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8473 lines
338 KiB
EmacsLisp
8473 lines
338 KiB
EmacsLisp
;;; simple.el --- basic editing commands for Emacs -*- lexical-binding: t -*-
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;; Copyright (C) 1985-1987, 1993-2015 Free Software Foundation, Inc.
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;; Maintainer: emacs-devel@gnu.org
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;; Keywords: internal
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;; Package: emacs
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; A grab-bag of basic Emacs commands not specifically related to some
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;; major mode or to file-handling.
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;;; Code:
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(eval-when-compile (require 'cl-lib))
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(declare-function widget-convert "wid-edit" (type &rest args))
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(declare-function shell-mode "shell" ())
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;;; From compile.el
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(defvar compilation-current-error)
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(defvar compilation-context-lines)
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(defcustom idle-update-delay 0.5
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"Idle time delay before updating various things on the screen.
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Various Emacs features that update auxiliary information when point moves
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wait this many seconds after Emacs becomes idle before doing an update."
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:type 'number
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:group 'display
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:version "22.1")
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(defgroup killing nil
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"Killing and yanking commands."
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:group 'editing)
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(defgroup paren-matching nil
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"Highlight (un)matching of parens and expressions."
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:group 'matching)
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;;; next-error support framework
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(defgroup next-error nil
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"`next-error' support framework."
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:group 'compilation
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:version "22.1")
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(defface next-error
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'((t (:inherit region)))
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"Face used to highlight next error locus."
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:group 'next-error
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:version "22.1")
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(defcustom next-error-highlight 0.5
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"Highlighting of locations in selected source buffers.
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If a number, highlight the locus in `next-error' face for the given time
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in seconds, or until the next command is executed.
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If t, highlight the locus until the next command is executed, or until
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some other locus replaces it.
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If nil, don't highlight the locus in the source buffer.
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If `fringe-arrow', indicate the locus by the fringe arrow
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indefinitely until some other locus replaces it."
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:type '(choice (number :tag "Highlight for specified time")
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(const :tag "Semipermanent highlighting" t)
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(const :tag "No highlighting" nil)
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(const :tag "Fringe arrow" fringe-arrow))
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:group 'next-error
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:version "22.1")
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(defcustom next-error-highlight-no-select 0.5
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"Highlighting of locations in `next-error-no-select'.
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If number, highlight the locus in `next-error' face for given time in seconds.
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If t, highlight the locus indefinitely until some other locus replaces it.
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If nil, don't highlight the locus in the source buffer.
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If `fringe-arrow', indicate the locus by the fringe arrow
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indefinitely until some other locus replaces it."
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:type '(choice (number :tag "Highlight for specified time")
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(const :tag "Semipermanent highlighting" t)
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(const :tag "No highlighting" nil)
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(const :tag "Fringe arrow" fringe-arrow))
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:group 'next-error
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:version "22.1")
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(defcustom next-error-recenter nil
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"Display the line in the visited source file recentered as specified.
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If non-nil, the value is passed directly to `recenter'."
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:type '(choice (integer :tag "Line to recenter to")
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(const :tag "Center of window" (4))
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(const :tag "No recentering" nil))
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:group 'next-error
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:version "23.1")
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(defcustom next-error-hook nil
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"List of hook functions run by `next-error' after visiting source file."
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:type 'hook
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:group 'next-error)
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(defvar next-error-highlight-timer nil)
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(defvar next-error-overlay-arrow-position nil)
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(put 'next-error-overlay-arrow-position 'overlay-arrow-string (purecopy "=>"))
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(add-to-list 'overlay-arrow-variable-list 'next-error-overlay-arrow-position)
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(defvar next-error-last-buffer nil
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"The most recent `next-error' buffer.
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A buffer becomes most recent when its compilation, grep, or
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similar mode is started, or when it is used with \\[next-error]
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or \\[compile-goto-error].")
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(defvar next-error-function nil
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"Function to use to find the next error in the current buffer.
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The function is called with 2 parameters:
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ARG is an integer specifying by how many errors to move.
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RESET is a boolean which, if non-nil, says to go back to the beginning
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of the errors before moving.
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Major modes providing compile-like functionality should set this variable
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to indicate to `next-error' that this is a candidate buffer and how
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to navigate in it.")
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(make-variable-buffer-local 'next-error-function)
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(defvar next-error-move-function nil
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"Function to use to move to an error locus.
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It takes two arguments, a buffer position in the error buffer
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and a buffer position in the error locus buffer.
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The buffer for the error locus should already be current.
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nil means use goto-char using the second argument position.")
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(make-variable-buffer-local 'next-error-move-function)
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(defsubst next-error-buffer-p (buffer
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&optional avoid-current
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extra-test-inclusive
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extra-test-exclusive)
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"Test if BUFFER is a `next-error' capable buffer.
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If AVOID-CURRENT is non-nil, treat the current buffer
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as an absolute last resort only.
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The function EXTRA-TEST-INCLUSIVE, if non-nil, is called in each buffer
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that normally would not qualify. If it returns t, the buffer
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in question is treated as usable.
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The function EXTRA-TEST-EXCLUSIVE, if non-nil, is called in each buffer
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that would normally be considered usable. If it returns nil,
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that buffer is rejected."
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(and (buffer-name buffer) ;First make sure it's live.
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(not (and avoid-current (eq buffer (current-buffer))))
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(with-current-buffer buffer
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(if next-error-function ; This is the normal test.
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;; Optionally reject some buffers.
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(if extra-test-exclusive
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(funcall extra-test-exclusive)
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t)
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;; Optionally accept some other buffers.
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(and extra-test-inclusive
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(funcall extra-test-inclusive))))))
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(defun next-error-find-buffer (&optional avoid-current
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extra-test-inclusive
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extra-test-exclusive)
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"Return a `next-error' capable buffer.
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If AVOID-CURRENT is non-nil, treat the current buffer
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as an absolute last resort only.
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The function EXTRA-TEST-INCLUSIVE, if non-nil, is called in each buffer
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that normally would not qualify. If it returns t, the buffer
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in question is treated as usable.
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The function EXTRA-TEST-EXCLUSIVE, if non-nil, is called in each buffer
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that would normally be considered usable. If it returns nil,
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that buffer is rejected."
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(or
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;; 1. If one window on the selected frame displays such buffer, return it.
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(let ((window-buffers
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(delete-dups
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(delq nil (mapcar (lambda (w)
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(if (next-error-buffer-p
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(window-buffer w)
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avoid-current
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extra-test-inclusive extra-test-exclusive)
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(window-buffer w)))
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(window-list))))))
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(if (eq (length window-buffers) 1)
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(car window-buffers)))
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;; 2. If next-error-last-buffer is an acceptable buffer, use that.
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(if (and next-error-last-buffer
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(next-error-buffer-p next-error-last-buffer avoid-current
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extra-test-inclusive extra-test-exclusive))
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next-error-last-buffer)
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;; 3. If the current buffer is acceptable, choose it.
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(if (next-error-buffer-p (current-buffer) avoid-current
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extra-test-inclusive extra-test-exclusive)
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(current-buffer))
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;; 4. Look for any acceptable buffer.
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(let ((buffers (buffer-list)))
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(while (and buffers
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(not (next-error-buffer-p
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(car buffers) avoid-current
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extra-test-inclusive extra-test-exclusive)))
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(setq buffers (cdr buffers)))
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(car buffers))
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;; 5. Use the current buffer as a last resort if it qualifies,
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;; even despite AVOID-CURRENT.
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(and avoid-current
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(next-error-buffer-p (current-buffer) nil
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extra-test-inclusive extra-test-exclusive)
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(progn
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(message "This is the only buffer with error message locations")
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(current-buffer)))
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;; 6. Give up.
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(error "No buffers contain error message locations")))
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(defun next-error (&optional arg reset)
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"Visit next `next-error' message and corresponding source code.
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If all the error messages parsed so far have been processed already,
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the message buffer is checked for new ones.
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A prefix ARG specifies how many error messages to move;
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negative means move back to previous error messages.
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Just \\[universal-argument] as a prefix means reparse the error message buffer
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and start at the first error.
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The RESET argument specifies that we should restart from the beginning.
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\\[next-error] normally uses the most recently started
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compilation, grep, or occur buffer. It can also operate on any
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buffer with output from the \\[compile], \\[grep] commands, or,
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more generally, on any buffer in Compilation mode or with
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Compilation Minor mode enabled, or any buffer in which
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`next-error-function' is bound to an appropriate function.
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To specify use of a particular buffer for error messages, type
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\\[next-error] in that buffer when it is the only one displayed
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in the current frame.
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Once \\[next-error] has chosen the buffer for error messages, it
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runs `next-error-hook' with `run-hooks', and stays with that buffer
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until you use it in some other buffer which uses Compilation mode
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or Compilation Minor mode.
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To control which errors are matched, customize the variable
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`compilation-error-regexp-alist'."
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(interactive "P")
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(if (consp arg) (setq reset t arg nil))
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(when (setq next-error-last-buffer (next-error-find-buffer))
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;; we know here that next-error-function is a valid symbol we can funcall
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(with-current-buffer next-error-last-buffer
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(funcall next-error-function (prefix-numeric-value arg) reset)
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(when next-error-recenter
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(recenter next-error-recenter))
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(run-hooks 'next-error-hook))))
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(defun next-error-internal ()
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"Visit the source code corresponding to the `next-error' message at point."
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(setq next-error-last-buffer (current-buffer))
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;; we know here that next-error-function is a valid symbol we can funcall
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(with-current-buffer next-error-last-buffer
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(funcall next-error-function 0 nil)
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(when next-error-recenter
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(recenter next-error-recenter))
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(run-hooks 'next-error-hook)))
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(defalias 'goto-next-locus 'next-error)
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(defalias 'next-match 'next-error)
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(defun previous-error (&optional n)
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"Visit previous `next-error' message and corresponding source code.
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Prefix arg N says how many error messages to move backwards (or
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forwards, if negative).
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This operates on the output from the \\[compile] and \\[grep] commands."
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(interactive "p")
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(next-error (- (or n 1))))
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(defun first-error (&optional n)
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"Restart at the first error.
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Visit corresponding source code.
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With prefix arg N, visit the source code of the Nth error.
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This operates on the output from the \\[compile] command, for instance."
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(interactive "p")
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(next-error n t))
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(defun next-error-no-select (&optional n)
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"Move point to the next error in the `next-error' buffer and highlight match.
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Prefix arg N says how many error messages to move forwards (or
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backwards, if negative).
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Finds and highlights the source line like \\[next-error], but does not
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select the source buffer."
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(interactive "p")
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(let ((next-error-highlight next-error-highlight-no-select))
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(next-error n))
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(pop-to-buffer next-error-last-buffer))
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(defun previous-error-no-select (&optional n)
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"Move point to the previous error in the `next-error' buffer and highlight match.
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Prefix arg N says how many error messages to move backwards (or
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forwards, if negative).
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Finds and highlights the source line like \\[previous-error], but does not
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select the source buffer."
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(interactive "p")
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(next-error-no-select (- (or n 1))))
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;; Internal variable for `next-error-follow-mode-post-command-hook'.
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(defvar next-error-follow-last-line nil)
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(define-minor-mode next-error-follow-minor-mode
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"Minor mode for compilation, occur and diff modes.
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With a prefix argument ARG, enable mode if ARG is positive, and
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disable it otherwise. If called from Lisp, enable mode if ARG is
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omitted or nil.
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When turned on, cursor motion in the compilation, grep, occur or diff
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buffer causes automatic display of the corresponding source code location."
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:group 'next-error :init-value nil :lighter " Fol"
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(if (not next-error-follow-minor-mode)
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(remove-hook 'post-command-hook 'next-error-follow-mode-post-command-hook t)
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(add-hook 'post-command-hook 'next-error-follow-mode-post-command-hook nil t)
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(make-local-variable 'next-error-follow-last-line)))
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;; Used as a `post-command-hook' by `next-error-follow-mode'
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;; for the *Compilation* *grep* and *Occur* buffers.
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(defun next-error-follow-mode-post-command-hook ()
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(unless (equal next-error-follow-last-line (line-number-at-pos))
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(setq next-error-follow-last-line (line-number-at-pos))
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(condition-case nil
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(let ((compilation-context-lines nil))
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(setq compilation-current-error (point))
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(next-error-no-select 0))
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(error t))))
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;;;
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(defun fundamental-mode ()
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"Major mode not specialized for anything in particular.
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Other major modes are defined by comparison with this one."
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(interactive)
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(kill-all-local-variables)
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(run-mode-hooks))
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;; Special major modes to view specially formatted data rather than files.
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(defvar special-mode-map
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(let ((map (make-sparse-keymap)))
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(suppress-keymap map)
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(define-key map "q" 'quit-window)
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(define-key map " " 'scroll-up-command)
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(define-key map [?\S-\ ] 'scroll-down-command)
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(define-key map "\C-?" 'scroll-down-command)
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(define-key map "?" 'describe-mode)
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(define-key map "h" 'describe-mode)
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(define-key map ">" 'end-of-buffer)
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(define-key map "<" 'beginning-of-buffer)
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(define-key map "g" 'revert-buffer)
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map))
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(put 'special-mode 'mode-class 'special)
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(define-derived-mode special-mode nil "Special"
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"Parent major mode from which special major modes should inherit."
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(setq buffer-read-only t))
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;; Making and deleting lines.
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(defvar self-insert-uses-region-functions nil
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"Special hook to tell if `self-insert-command' will use the region.
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It must be called via `run-hook-with-args-until-success' with no arguments.
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Any `post-self-insert-command' which consumes the region should
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register a function on this hook so that things like `delete-selection-mode'
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can refrain from consuming the region.")
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(defvar hard-newline (propertize "\n" 'hard t 'rear-nonsticky '(hard))
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"Propertized string representing a hard newline character.")
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(defun newline (&optional arg interactive)
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"Insert a newline, and move to left margin of the new line if it's blank.
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If option `use-hard-newlines' is non-nil, the newline is marked with the
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text-property `hard'.
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With ARG, insert that many newlines.
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If `electric-indent-mode' is enabled, this indents the final new line
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that it adds, and reindents the preceding line. To just insert
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a newline, use \\[electric-indent-just-newline].
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Calls `auto-fill-function' if the current column number is greater
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than the value of `fill-column' and ARG is nil.
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A non-nil INTERACTIVE argument means to run the `post-self-insert-hook'."
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(interactive "*P\np")
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(barf-if-buffer-read-only)
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;; Call self-insert so that auto-fill, abbrev expansion etc. happens.
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;; Set last-command-event to tell self-insert what to insert.
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(let* ((was-page-start (and (bolp) (looking-at page-delimiter)))
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(beforepos (point))
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(last-command-event ?\n)
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;; Don't auto-fill if we have a numeric argument.
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(auto-fill-function (if arg nil auto-fill-function))
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(postproc
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;; Do the rest in post-self-insert-hook, because we want to do it
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;; *before* other functions on that hook.
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(lambda ()
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(cl-assert (eq ?\n (char-before)))
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;; Mark the newline(s) `hard'.
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(if use-hard-newlines
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(set-hard-newline-properties
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(- (point) (prefix-numeric-value arg)) (point)))
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;; If the newline leaves the previous line blank, and we
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;; have a left margin, delete that from the blank line.
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(save-excursion
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(goto-char beforepos)
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(beginning-of-line)
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(and (looking-at "[ \t]$")
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(> (current-left-margin) 0)
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(delete-region (point)
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(line-end-position))))
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;; Indent the line after the newline, except in one case:
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||
;; when we added the newline at the beginning of a line which
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;; starts a page.
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(or was-page-start
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(move-to-left-margin nil t)))))
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(unwind-protect
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(if (not interactive)
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;; FIXME: For non-interactive uses, many calls actually just want
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;; (insert "\n"), so maybe we should do just that, so as to avoid
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;; the risk of filling or running abbrevs unexpectedly.
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(let ((post-self-insert-hook (list postproc)))
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(self-insert-command (prefix-numeric-value arg)))
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(unwind-protect
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(progn
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(add-hook 'post-self-insert-hook postproc nil t)
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(self-insert-command (prefix-numeric-value arg)))
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;; We first used let-binding to protect the hook, but that was naive
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;; since add-hook affects the symbol-default value of the variable,
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;; whereas the let-binding might only protect the buffer-local value.
|
||
(remove-hook 'post-self-insert-hook postproc t)))
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||
(cl-assert (not (member postproc post-self-insert-hook)))
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(cl-assert (not (member postproc (default-value 'post-self-insert-hook))))))
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nil)
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(defun set-hard-newline-properties (from to)
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(let ((sticky (get-text-property from 'rear-nonsticky)))
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(put-text-property from to 'hard 't)
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||
;; If rear-nonsticky is not "t", add 'hard to rear-nonsticky list
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(if (and (listp sticky) (not (memq 'hard sticky)))
|
||
(put-text-property from (point) 'rear-nonsticky
|
||
(cons 'hard sticky)))))
|
||
|
||
(declare-function electric-indent-just-newline "electric")
|
||
(defun open-line (n &optional interactive)
|
||
"Insert a newline and leave point before it.
|
||
If `electric-indent-mode' is enabled, indent the new line if it's
|
||
not empty.
|
||
If there is a fill prefix and/or a `left-margin', insert them on
|
||
the new line. If the old line would have been blank, insert them
|
||
on the old line as well.
|
||
|
||
With arg N, insert N newlines.
|
||
A non-nil INTERACTIVE argument means to run the `post-self-insert-hook'."
|
||
(interactive "*p\np")
|
||
(let* ((do-fill-prefix (and fill-prefix (bolp)))
|
||
(do-left-margin (and (bolp) (> (current-left-margin) 0)))
|
||
(loc (point-marker))
|
||
;; Don't expand an abbrev before point.
|
||
(abbrev-mode nil))
|
||
(if (and interactive
|
||
(looking-at-p "[[:space:]]*$"))
|
||
(electric-indent-just-newline n)
|
||
(newline n interactive))
|
||
(goto-char loc)
|
||
(while (> n 0)
|
||
(cond ((bolp)
|
||
(if do-left-margin (indent-to (current-left-margin)))
|
||
(if do-fill-prefix (insert-and-inherit fill-prefix))))
|
||
(forward-line 1)
|
||
(setq n (1- n)))
|
||
(goto-char loc)
|
||
;; Necessary in case a margin or prefix was inserted.
|
||
(end-of-line)))
|
||
|
||
(defun split-line (&optional arg)
|
||
"Split current line, moving portion beyond point vertically down.
|
||
If the current line starts with `fill-prefix', insert it on the new
|
||
line as well. With prefix ARG, don't insert `fill-prefix' on new line.
|
||
|
||
When called from Lisp code, ARG may be a prefix string to copy."
|
||
(interactive "*P")
|
||
(skip-chars-forward " \t")
|
||
(let* ((col (current-column))
|
||
(pos (point))
|
||
;; What prefix should we check for (nil means don't).
|
||
(prefix (cond ((stringp arg) arg)
|
||
(arg nil)
|
||
(t fill-prefix)))
|
||
;; Does this line start with it?
|
||
(have-prfx (and prefix
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(looking-at (regexp-quote prefix))))))
|
||
(newline 1)
|
||
(if have-prfx (insert-and-inherit prefix))
|
||
(indent-to col 0)
|
||
(goto-char pos)))
|
||
|
||
(defun delete-indentation (&optional arg)
|
||
"Join this line to previous and fix up whitespace at join.
|
||
If there is a fill prefix, delete it from the beginning of this line.
|
||
With argument, join this line to following line."
|
||
(interactive "*P")
|
||
(beginning-of-line)
|
||
(if arg (forward-line 1))
|
||
(if (eq (preceding-char) ?\n)
|
||
(progn
|
||
(delete-region (point) (1- (point)))
|
||
;; If the second line started with the fill prefix,
|
||
;; delete the prefix.
|
||
(if (and fill-prefix
|
||
(<= (+ (point) (length fill-prefix)) (point-max))
|
||
(string= fill-prefix
|
||
(buffer-substring (point)
|
||
(+ (point) (length fill-prefix)))))
|
||
(delete-region (point) (+ (point) (length fill-prefix))))
|
||
(fixup-whitespace))))
|
||
|
||
(defalias 'join-line #'delete-indentation) ; easier to find
|
||
|
||
(defun delete-blank-lines ()
|
||
"On blank line, delete all surrounding blank lines, leaving just one.
|
||
On isolated blank line, delete that one.
|
||
On nonblank line, delete any immediately following blank lines."
|
||
(interactive "*")
|
||
(let (thisblank singleblank)
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(setq thisblank (looking-at "[ \t]*$"))
|
||
;; Set singleblank if there is just one blank line here.
|
||
(setq singleblank
|
||
(and thisblank
|
||
(not (looking-at "[ \t]*\n[ \t]*$"))
|
||
(or (bobp)
|
||
(progn (forward-line -1)
|
||
(not (looking-at "[ \t]*$")))))))
|
||
;; Delete preceding blank lines, and this one too if it's the only one.
|
||
(if thisblank
|
||
(progn
|
||
(beginning-of-line)
|
||
(if singleblank (forward-line 1))
|
||
(delete-region (point)
|
||
(if (re-search-backward "[^ \t\n]" nil t)
|
||
(progn (forward-line 1) (point))
|
||
(point-min)))))
|
||
;; Delete following blank lines, unless the current line is blank
|
||
;; and there are no following blank lines.
|
||
(if (not (and thisblank singleblank))
|
||
(save-excursion
|
||
(end-of-line)
|
||
(forward-line 1)
|
||
(delete-region (point)
|
||
(if (re-search-forward "[^ \t\n]" nil t)
|
||
(progn (beginning-of-line) (point))
|
||
(point-max)))))
|
||
;; Handle the special case where point is followed by newline and eob.
|
||
;; Delete the line, leaving point at eob.
|
||
(if (looking-at "^[ \t]*\n\\'")
|
||
(delete-region (point) (point-max)))))
|
||
|
||
(defcustom delete-trailing-lines t
|
||
"If non-nil, \\[delete-trailing-whitespace] deletes trailing lines.
|
||
Trailing lines are deleted only if `delete-trailing-whitespace'
|
||
is called on the entire buffer (rather than an active region)."
|
||
:type 'boolean
|
||
:group 'editing
|
||
:version "24.3")
|
||
|
||
(defun delete-trailing-whitespace (&optional start end)
|
||
"Delete trailing whitespace between START and END.
|
||
If called interactively, START and END are the start/end of the
|
||
region if the mark is active, or of the buffer's accessible
|
||
portion if the mark is inactive.
|
||
|
||
This command deletes whitespace characters after the last
|
||
non-whitespace character in each line between START and END. It
|
||
does not consider formfeed characters to be whitespace.
|
||
|
||
If this command acts on the entire buffer (i.e. if called
|
||
interactively with the mark inactive, or called from Lisp with
|
||
END nil), it also deletes all trailing lines at the end of the
|
||
buffer if the variable `delete-trailing-lines' is non-nil."
|
||
(interactive (progn
|
||
(barf-if-buffer-read-only)
|
||
(if (use-region-p)
|
||
(list (region-beginning) (region-end))
|
||
(list nil nil))))
|
||
(save-match-data
|
||
(save-excursion
|
||
(let ((end-marker (copy-marker (or end (point-max))))
|
||
(start (or start (point-min))))
|
||
(goto-char start)
|
||
(while (re-search-forward "\\s-$" end-marker t)
|
||
(skip-syntax-backward "-" (line-beginning-position))
|
||
;; Don't delete formfeeds, even if they are considered whitespace.
|
||
(if (looking-at-p ".*\f")
|
||
(goto-char (match-end 0)))
|
||
(delete-region (point) (match-end 0)))
|
||
;; Delete trailing empty lines.
|
||
(goto-char end-marker)
|
||
(when (and (not end)
|
||
delete-trailing-lines
|
||
;; Really the end of buffer.
|
||
(= (point-max) (1+ (buffer-size)))
|
||
(<= (skip-chars-backward "\n") -2))
|
||
(delete-region (1+ (point)) end-marker))
|
||
(set-marker end-marker nil))))
|
||
;; Return nil for the benefit of `write-file-functions'.
|
||
nil)
|
||
|
||
(defun newline-and-indent ()
|
||
"Insert a newline, then indent according to major mode.
|
||
Indentation is done using the value of `indent-line-function'.
|
||
In programming language modes, this is the same as TAB.
|
||
In some text modes, where TAB inserts a tab, this command indents to the
|
||
column specified by the function `current-left-margin'."
|
||
(interactive "*")
|
||
(delete-horizontal-space t)
|
||
(newline nil t)
|
||
(indent-according-to-mode))
|
||
|
||
(defun reindent-then-newline-and-indent ()
|
||
"Reindent current line, insert newline, then indent the new line.
|
||
Indentation of both lines is done according to the current major mode,
|
||
which means calling the current value of `indent-line-function'.
|
||
In programming language modes, this is the same as TAB.
|
||
In some text modes, where TAB inserts a tab, this indents to the
|
||
column specified by the function `current-left-margin'."
|
||
(interactive "*")
|
||
(let ((pos (point)))
|
||
;; Be careful to insert the newline before indenting the line.
|
||
;; Otherwise, the indentation might be wrong.
|
||
(newline)
|
||
(save-excursion
|
||
(goto-char pos)
|
||
;; We are at EOL before the call to indent-according-to-mode, and
|
||
;; after it we usually are as well, but not always. We tried to
|
||
;; address it with `save-excursion' but that uses a normal marker
|
||
;; whereas we need `move after insertion', so we do the save/restore
|
||
;; by hand.
|
||
(setq pos (copy-marker pos t))
|
||
(indent-according-to-mode)
|
||
(goto-char pos)
|
||
;; Remove the trailing white-space after indentation because
|
||
;; indentation may introduce the whitespace.
|
||
(delete-horizontal-space t))
|
||
(indent-according-to-mode)))
|
||
|
||
(defcustom read-quoted-char-radix 8
|
||
"Radix for \\[quoted-insert] and other uses of `read-quoted-char'.
|
||
Legitimate radix values are 8, 10 and 16."
|
||
:type '(choice (const 8) (const 10) (const 16))
|
||
:group 'editing-basics)
|
||
|
||
(defun read-quoted-char (&optional prompt)
|
||
"Like `read-char', but do not allow quitting.
|
||
Also, if the first character read is an octal digit,
|
||
we read any number of octal digits and return the
|
||
specified character code. Any nondigit terminates the sequence.
|
||
If the terminator is RET, it is discarded;
|
||
any other terminator is used itself as input.
|
||
|
||
The optional argument PROMPT specifies a string to use to prompt the user.
|
||
The variable `read-quoted-char-radix' controls which radix to use
|
||
for numeric input."
|
||
(let ((message-log-max nil)
|
||
(help-events (delq nil (mapcar (lambda (c) (unless (characterp c) c))
|
||
help-event-list)))
|
||
done (first t) (code 0) translated)
|
||
(while (not done)
|
||
(let ((inhibit-quit first)
|
||
;; Don't let C-h or other help chars get the help
|
||
;; message--only help function keys. See bug#16617.
|
||
(help-char nil)
|
||
(help-event-list help-events)
|
||
(help-form
|
||
"Type the special character you want to use,
|
||
or the octal character code.
|
||
RET terminates the character code and is discarded;
|
||
any other non-digit terminates the character code and is then used as input."))
|
||
(setq translated (read-key (and prompt (format "%s-" prompt))))
|
||
(if inhibit-quit (setq quit-flag nil)))
|
||
(if (integerp translated)
|
||
(setq translated (char-resolve-modifiers translated)))
|
||
(cond ((null translated))
|
||
((not (integerp translated))
|
||
(setq unread-command-events
|
||
(nconc (listify-key-sequence (this-single-command-raw-keys))
|
||
unread-command-events)
|
||
done t))
|
||
((/= (logand translated ?\M-\^@) 0)
|
||
;; Turn a meta-character into a character with the 0200 bit set.
|
||
(setq code (logior (logand translated (lognot ?\M-\^@)) 128)
|
||
done t))
|
||
((and (<= ?0 translated)
|
||
(< translated (+ ?0 (min 10 read-quoted-char-radix))))
|
||
(setq code (+ (* code read-quoted-char-radix) (- translated ?0)))
|
||
(and prompt (setq prompt (message "%s %c" prompt translated))))
|
||
((and (<= ?a (downcase translated))
|
||
(< (downcase translated)
|
||
(+ ?a -10 (min 36 read-quoted-char-radix))))
|
||
(setq code (+ (* code read-quoted-char-radix)
|
||
(+ 10 (- (downcase translated) ?a))))
|
||
(and prompt (setq prompt (message "%s %c" prompt translated))))
|
||
((and (not first) (eq translated ?\C-m))
|
||
(setq done t))
|
||
((not first)
|
||
(setq unread-command-events
|
||
(nconc (listify-key-sequence (this-single-command-raw-keys))
|
||
unread-command-events)
|
||
done t))
|
||
(t (setq code translated
|
||
done t)))
|
||
(setq first nil))
|
||
code))
|
||
|
||
(defun quoted-insert (arg)
|
||
"Read next input character and insert it.
|
||
This is useful for inserting control characters.
|
||
With argument, insert ARG copies of the character.
|
||
|
||
If the first character you type after this command is an octal digit,
|
||
you should type a sequence of octal digits which specify a character code.
|
||
Any nondigit terminates the sequence. If the terminator is a RET,
|
||
it is discarded; any other terminator is used itself as input.
|
||
The variable `read-quoted-char-radix' specifies the radix for this feature;
|
||
set it to 10 or 16 to use decimal or hex instead of octal.
|
||
|
||
In overwrite mode, this function inserts the character anyway, and
|
||
does not handle octal digits specially. This means that if you use
|
||
overwrite as your normal editing mode, you can use this function to
|
||
insert characters when necessary.
|
||
|
||
In binary overwrite mode, this function does overwrite, and octal
|
||
digits are interpreted as a character code. This is intended to be
|
||
useful for editing binary files."
|
||
(interactive "*p")
|
||
(let* ((char
|
||
;; Avoid "obsolete" warnings for translation-table-for-input.
|
||
(with-no-warnings
|
||
(let (translation-table-for-input input-method-function)
|
||
(if (or (not overwrite-mode)
|
||
(eq overwrite-mode 'overwrite-mode-binary))
|
||
(read-quoted-char)
|
||
(read-char))))))
|
||
;; This used to assume character codes 0240 - 0377 stand for
|
||
;; characters in some single-byte character set, and converted them
|
||
;; to Emacs characters. But in 23.1 this feature is deprecated
|
||
;; in favor of inserting the corresponding Unicode characters.
|
||
;; (if (and enable-multibyte-characters
|
||
;; (>= char ?\240)
|
||
;; (<= char ?\377))
|
||
;; (setq char (unibyte-char-to-multibyte char)))
|
||
(unless (characterp char)
|
||
(user-error "%s is not a valid character"
|
||
(key-description (vector char))))
|
||
(if (> arg 0)
|
||
(if (eq overwrite-mode 'overwrite-mode-binary)
|
||
(delete-char arg)))
|
||
(while (> arg 0)
|
||
(insert-and-inherit char)
|
||
(setq arg (1- arg)))))
|
||
|
||
(defun forward-to-indentation (&optional arg)
|
||
"Move forward ARG lines and position at first nonblank character."
|
||
(interactive "^p")
|
||
(forward-line (or arg 1))
|
||
(skip-chars-forward " \t"))
|
||
|
||
(defun backward-to-indentation (&optional arg)
|
||
"Move backward ARG lines and position at first nonblank character."
|
||
(interactive "^p")
|
||
(forward-line (- (or arg 1)))
|
||
(skip-chars-forward " \t"))
|
||
|
||
(defun back-to-indentation ()
|
||
"Move point to the first non-whitespace character on this line."
|
||
(interactive "^")
|
||
(beginning-of-line 1)
|
||
(skip-syntax-forward " " (line-end-position))
|
||
;; Move back over chars that have whitespace syntax but have the p flag.
|
||
(backward-prefix-chars))
|
||
|
||
(defun fixup-whitespace ()
|
||
"Fixup white space between objects around point.
|
||
Leave one space or none, according to the context."
|
||
(interactive "*")
|
||
(save-excursion
|
||
(delete-horizontal-space)
|
||
(if (or (looking-at "^\\|\\s)")
|
||
(save-excursion (forward-char -1)
|
||
(looking-at "$\\|\\s(\\|\\s'")))
|
||
nil
|
||
(insert ?\s))))
|
||
|
||
(defun delete-horizontal-space (&optional backward-only)
|
||
"Delete all spaces and tabs around point.
|
||
If BACKWARD-ONLY is non-nil, only delete them before point."
|
||
(interactive "*P")
|
||
(let ((orig-pos (point)))
|
||
(delete-region
|
||
(if backward-only
|
||
orig-pos
|
||
(progn
|
||
(skip-chars-forward " \t")
|
||
(constrain-to-field nil orig-pos t)))
|
||
(progn
|
||
(skip-chars-backward " \t")
|
||
(constrain-to-field nil orig-pos)))))
|
||
|
||
(defun just-one-space (&optional n)
|
||
"Delete all spaces and tabs around point, leaving one space (or N spaces).
|
||
If N is negative, delete newlines as well, leaving -N spaces.
|
||
See also `cycle-spacing'."
|
||
(interactive "*p")
|
||
(cycle-spacing n nil 'single-shot))
|
||
|
||
(defvar cycle-spacing--context nil
|
||
"Store context used in consecutive calls to `cycle-spacing' command.
|
||
The first time `cycle-spacing' runs, it saves in this variable:
|
||
its N argument, the original point position, and the original spacing
|
||
around point.")
|
||
|
||
(defun cycle-spacing (&optional n preserve-nl-back mode)
|
||
"Manipulate whitespace around point in a smart way.
|
||
In interactive use, this function behaves differently in successive
|
||
consecutive calls.
|
||
|
||
The first call in a sequence acts like `just-one-space'.
|
||
It deletes all spaces and tabs around point, leaving one space
|
||
\(or N spaces). N is the prefix argument. If N is negative,
|
||
it deletes newlines as well, leaving -N spaces.
|
||
\(If PRESERVE-NL-BACK is non-nil, it does not delete newlines before point.)
|
||
|
||
The second call in a sequence deletes all spaces.
|
||
|
||
The third call in a sequence restores the original whitespace (and point).
|
||
|
||
If MODE is `single-shot', it only performs the first step in the sequence.
|
||
If MODE is `fast' and the first step would not result in any change
|
||
\(i.e., there are exactly (abs N) spaces around point),
|
||
the function goes straight to the second step.
|
||
|
||
Repeatedly calling the function with different values of N starts a
|
||
new sequence each time."
|
||
(interactive "*p")
|
||
(let ((orig-pos (point))
|
||
(skip-characters (if (and n (< n 0)) " \t\n\r" " \t"))
|
||
(num (abs (or n 1))))
|
||
(skip-chars-backward (if preserve-nl-back " \t" skip-characters))
|
||
(constrain-to-field nil orig-pos)
|
||
(cond
|
||
;; Command run for the first time, single-shot mode or different argument
|
||
((or (eq 'single-shot mode)
|
||
(not (equal last-command this-command))
|
||
(not cycle-spacing--context)
|
||
(not (eq (car cycle-spacing--context) n)))
|
||
(let* ((start (point))
|
||
(num (- num (skip-chars-forward " " (+ num (point)))))
|
||
(mid (point))
|
||
(end (progn
|
||
(skip-chars-forward skip-characters)
|
||
(constrain-to-field nil orig-pos t))))
|
||
(setq cycle-spacing--context ;; Save for later.
|
||
;; Special handling for case where there was no space at all.
|
||
(unless (= start end)
|
||
(cons n (cons orig-pos (buffer-substring start (point))))))
|
||
;; If this run causes no change in buffer content, delete all spaces,
|
||
;; otherwise delete all excess spaces.
|
||
(delete-region (if (and (eq mode 'fast) (zerop num) (= mid end))
|
||
start mid) end)
|
||
(insert (make-string num ?\s))))
|
||
|
||
;; Command run for the second time.
|
||
((not (equal orig-pos (point)))
|
||
(delete-region (point) orig-pos))
|
||
|
||
;; Command run for the third time.
|
||
(t
|
||
(insert (cddr cycle-spacing--context))
|
||
(goto-char (cadr cycle-spacing--context))
|
||
(setq cycle-spacing--context nil)))))
|
||
|
||
(defun beginning-of-buffer (&optional arg)
|
||
"Move point to the beginning of the buffer.
|
||
With numeric arg N, put point N/10 of the way from the beginning.
|
||
If the buffer is narrowed, this command uses the beginning of the
|
||
accessible part of the buffer.
|
||
|
||
If Transient Mark mode is disabled, leave mark at previous
|
||
position, unless a \\[universal-argument] prefix is supplied."
|
||
(declare (interactive-only "use `(goto-char (point-min))' instead."))
|
||
(interactive "^P")
|
||
(or (consp arg)
|
||
(region-active-p)
|
||
(push-mark))
|
||
(let ((size (- (point-max) (point-min))))
|
||
(goto-char (if (and arg (not (consp arg)))
|
||
(+ (point-min)
|
||
(if (> size 10000)
|
||
;; Avoid overflow for large buffer sizes!
|
||
(* (prefix-numeric-value arg)
|
||
(/ size 10))
|
||
(/ (+ 10 (* size (prefix-numeric-value arg))) 10)))
|
||
(point-min))))
|
||
(if (and arg (not (consp arg))) (forward-line 1)))
|
||
|
||
(defun end-of-buffer (&optional arg)
|
||
"Move point to the end of the buffer.
|
||
With numeric arg N, put point N/10 of the way from the end.
|
||
If the buffer is narrowed, this command uses the end of the
|
||
accessible part of the buffer.
|
||
|
||
If Transient Mark mode is disabled, leave mark at previous
|
||
position, unless a \\[universal-argument] prefix is supplied."
|
||
(declare (interactive-only "use `(goto-char (point-max))' instead."))
|
||
(interactive "^P")
|
||
(or (consp arg) (region-active-p) (push-mark))
|
||
(let ((size (- (point-max) (point-min))))
|
||
(goto-char (if (and arg (not (consp arg)))
|
||
(- (point-max)
|
||
(if (> size 10000)
|
||
;; Avoid overflow for large buffer sizes!
|
||
(* (prefix-numeric-value arg)
|
||
(/ size 10))
|
||
(/ (* size (prefix-numeric-value arg)) 10)))
|
||
(point-max))))
|
||
;; If we went to a place in the middle of the buffer,
|
||
;; adjust it to the beginning of a line.
|
||
(cond ((and arg (not (consp arg))) (forward-line 1))
|
||
((and (eq (current-buffer) (window-buffer))
|
||
(> (point) (window-end nil t)))
|
||
;; If the end of the buffer is not already on the screen,
|
||
;; then scroll specially to put it near, but not at, the bottom.
|
||
(overlay-recenter (point))
|
||
(recenter -3))))
|
||
|
||
(defcustom delete-active-region t
|
||
"Whether single-char deletion commands delete an active region.
|
||
This has an effect only if Transient Mark mode is enabled, and
|
||
affects `delete-forward-char' and `delete-backward-char', though
|
||
not `delete-char'.
|
||
|
||
If the value is the symbol `kill', the active region is killed
|
||
instead of deleted."
|
||
:type '(choice (const :tag "Delete active region" t)
|
||
(const :tag "Kill active region" kill)
|
||
(const :tag "Do ordinary deletion" nil))
|
||
:group 'killing
|
||
:version "24.1")
|
||
|
||
(defvar region-extract-function
|
||
(lambda (delete)
|
||
(when (region-beginning)
|
||
(if (eq delete 'delete-only)
|
||
(delete-region (region-beginning) (region-end))
|
||
(filter-buffer-substring (region-beginning) (region-end) delete))))
|
||
"Function to get the region's content.
|
||
Called with one argument DELETE.
|
||
If DELETE is `delete-only', then only delete the region and the return value
|
||
is undefined. If DELETE is nil, just return the content as a string.
|
||
If anything else, delete the region and return its content as a string.")
|
||
|
||
(defun delete-backward-char (n &optional killflag)
|
||
"Delete the previous N characters (following if N is negative).
|
||
If Transient Mark mode is enabled, the mark is active, and N is 1,
|
||
delete the text in the region and deactivate the mark instead.
|
||
To disable this, set option `delete-active-region' to nil.
|
||
|
||
Optional second arg KILLFLAG, if non-nil, means to kill (save in
|
||
kill ring) instead of delete. Interactively, N is the prefix
|
||
arg, and KILLFLAG is set if N is explicitly specified.
|
||
|
||
In Overwrite mode, single character backward deletion may replace
|
||
tabs with spaces so as to back over columns, unless point is at
|
||
the end of the line."
|
||
(declare (interactive-only delete-char))
|
||
(interactive "p\nP")
|
||
(unless (integerp n)
|
||
(signal 'wrong-type-argument (list 'integerp n)))
|
||
(cond ((and (use-region-p)
|
||
delete-active-region
|
||
(= n 1))
|
||
;; If a region is active, kill or delete it.
|
||
(if (eq delete-active-region 'kill)
|
||
(kill-region (region-beginning) (region-end) 'region)
|
||
(funcall region-extract-function 'delete-only)))
|
||
;; In Overwrite mode, maybe untabify while deleting
|
||
((null (or (null overwrite-mode)
|
||
(<= n 0)
|
||
(memq (char-before) '(?\t ?\n))
|
||
(eobp)
|
||
(eq (char-after) ?\n)))
|
||
(let ((ocol (current-column)))
|
||
(delete-char (- n) killflag)
|
||
(save-excursion
|
||
(insert-char ?\s (- ocol (current-column)) nil))))
|
||
;; Otherwise, do simple deletion.
|
||
(t (delete-char (- n) killflag))))
|
||
|
||
(defun delete-forward-char (n &optional killflag)
|
||
"Delete the following N characters (previous if N is negative).
|
||
If Transient Mark mode is enabled, the mark is active, and N is 1,
|
||
delete the text in the region and deactivate the mark instead.
|
||
To disable this, set variable `delete-active-region' to nil.
|
||
|
||
Optional second arg KILLFLAG non-nil means to kill (save in kill
|
||
ring) instead of delete. Interactively, N is the prefix arg, and
|
||
KILLFLAG is set if N was explicitly specified."
|
||
(declare (interactive-only delete-char))
|
||
(interactive "p\nP")
|
||
(unless (integerp n)
|
||
(signal 'wrong-type-argument (list 'integerp n)))
|
||
(cond ((and (use-region-p)
|
||
delete-active-region
|
||
(= n 1))
|
||
;; If a region is active, kill or delete it.
|
||
(if (eq delete-active-region 'kill)
|
||
(kill-region (region-beginning) (region-end) 'region)
|
||
(funcall region-extract-function 'delete-only)))
|
||
|
||
;; Otherwise, do simple deletion.
|
||
(t (delete-char n killflag))))
|
||
|
||
(defun mark-whole-buffer ()
|
||
"Put point at beginning and mark at end of buffer.
|
||
If narrowing is in effect, only uses the accessible part of the buffer.
|
||
You probably should not use this function in Lisp programs;
|
||
it is usually a mistake for a Lisp function to use any subroutine
|
||
that uses or sets the mark."
|
||
(declare (interactive-only t))
|
||
(interactive)
|
||
(push-mark (point))
|
||
(push-mark (point-max) nil t)
|
||
(goto-char (point-min)))
|
||
|
||
|
||
;; Counting lines, one way or another.
|
||
|
||
(defun goto-line (line &optional buffer)
|
||
"Go to LINE, counting from line 1 at beginning of buffer.
|
||
If called interactively, a numeric prefix argument specifies
|
||
LINE; without a numeric prefix argument, read LINE from the
|
||
minibuffer.
|
||
|
||
If optional argument BUFFER is non-nil, switch to that buffer and
|
||
move to line LINE there. If called interactively with \\[universal-argument]
|
||
as argument, BUFFER is the most recently selected other buffer.
|
||
|
||
Prior to moving point, this function sets the mark (without
|
||
activating it), unless Transient Mark mode is enabled and the
|
||
mark is already active.
|
||
|
||
This function is usually the wrong thing to use in a Lisp program.
|
||
What you probably want instead is something like:
|
||
(goto-char (point-min))
|
||
(forward-line (1- N))
|
||
If at all possible, an even better solution is to use char counts
|
||
rather than line counts."
|
||
(declare (interactive-only forward-line))
|
||
(interactive
|
||
(if (and current-prefix-arg (not (consp current-prefix-arg)))
|
||
(list (prefix-numeric-value current-prefix-arg))
|
||
;; Look for a default, a number in the buffer at point.
|
||
(let* ((default
|
||
(save-excursion
|
||
(skip-chars-backward "0-9")
|
||
(if (looking-at "[0-9]")
|
||
(string-to-number
|
||
(buffer-substring-no-properties
|
||
(point)
|
||
(progn (skip-chars-forward "0-9")
|
||
(point)))))))
|
||
;; Decide if we're switching buffers.
|
||
(buffer
|
||
(if (consp current-prefix-arg)
|
||
(other-buffer (current-buffer) t)))
|
||
(buffer-prompt
|
||
(if buffer
|
||
(concat " in " (buffer-name buffer))
|
||
"")))
|
||
;; Read the argument, offering that number (if any) as default.
|
||
(list (read-number (format "Goto line%s: " buffer-prompt)
|
||
(list default (line-number-at-pos)))
|
||
buffer))))
|
||
;; Switch to the desired buffer, one way or another.
|
||
(if buffer
|
||
(let ((window (get-buffer-window buffer)))
|
||
(if window (select-window window)
|
||
(switch-to-buffer-other-window buffer))))
|
||
;; Leave mark at previous position
|
||
(or (region-active-p) (push-mark))
|
||
;; Move to the specified line number in that buffer.
|
||
(save-restriction
|
||
(widen)
|
||
(goto-char (point-min))
|
||
(if (eq selective-display t)
|
||
(re-search-forward "[\n\C-m]" nil 'end (1- line))
|
||
(forward-line (1- line)))))
|
||
|
||
(defun count-words-region (start end &optional arg)
|
||
"Count the number of words in the region.
|
||
If called interactively, print a message reporting the number of
|
||
lines, words, and characters in the region (whether or not the
|
||
region is active); with prefix ARG, report for the entire buffer
|
||
rather than the region.
|
||
|
||
If called from Lisp, return the number of words between positions
|
||
START and END."
|
||
(interactive (if current-prefix-arg
|
||
(list nil nil current-prefix-arg)
|
||
(list (region-beginning) (region-end) nil)))
|
||
(cond ((not (called-interactively-p 'any))
|
||
(count-words start end))
|
||
(arg
|
||
(count-words--buffer-message))
|
||
(t
|
||
(count-words--message "Region" start end))))
|
||
|
||
(defun count-words (start end)
|
||
"Count words between START and END.
|
||
If called interactively, START and END are normally the start and
|
||
end of the buffer; but if the region is active, START and END are
|
||
the start and end of the region. Print a message reporting the
|
||
number of lines, words, and chars.
|
||
|
||
If called from Lisp, return the number of words between START and
|
||
END, without printing any message."
|
||
(interactive (list nil nil))
|
||
(cond ((not (called-interactively-p 'any))
|
||
(let ((words 0))
|
||
(save-excursion
|
||
(save-restriction
|
||
(narrow-to-region start end)
|
||
(goto-char (point-min))
|
||
(while (forward-word 1)
|
||
(setq words (1+ words)))))
|
||
words))
|
||
((use-region-p)
|
||
(call-interactively 'count-words-region))
|
||
(t
|
||
(count-words--buffer-message))))
|
||
|
||
(defun count-words--buffer-message ()
|
||
(count-words--message
|
||
(if (buffer-narrowed-p) "Narrowed part of buffer" "Buffer")
|
||
(point-min) (point-max)))
|
||
|
||
(defun count-words--message (str start end)
|
||
(let ((lines (count-lines start end))
|
||
(words (count-words start end))
|
||
(chars (- end start)))
|
||
(message "%s has %d line%s, %d word%s, and %d character%s."
|
||
str
|
||
lines (if (= lines 1) "" "s")
|
||
words (if (= words 1) "" "s")
|
||
chars (if (= chars 1) "" "s"))))
|
||
|
||
(define-obsolete-function-alias 'count-lines-region 'count-words-region "24.1")
|
||
|
||
(defun what-line ()
|
||
"Print the current buffer line number and narrowed line number of point."
|
||
(interactive)
|
||
(let ((start (point-min))
|
||
(n (line-number-at-pos)))
|
||
(if (= start 1)
|
||
(message "Line %d" n)
|
||
(save-excursion
|
||
(save-restriction
|
||
(widen)
|
||
(message "line %d (narrowed line %d)"
|
||
(+ n (line-number-at-pos start) -1) n))))))
|
||
|
||
(defun count-lines (start end)
|
||
"Return number of lines between START and END.
|
||
This is usually the number of newlines between them,
|
||
but can be one more if START is not equal to END
|
||
and the greater of them is not at the start of a line."
|
||
(save-excursion
|
||
(save-restriction
|
||
(narrow-to-region start end)
|
||
(goto-char (point-min))
|
||
(if (eq selective-display t)
|
||
(save-match-data
|
||
(let ((done 0))
|
||
(while (re-search-forward "[\n\C-m]" nil t 40)
|
||
(setq done (+ 40 done)))
|
||
(while (re-search-forward "[\n\C-m]" nil t 1)
|
||
(setq done (+ 1 done)))
|
||
(goto-char (point-max))
|
||
(if (and (/= start end)
|
||
(not (bolp)))
|
||
(1+ done)
|
||
done)))
|
||
(- (buffer-size) (forward-line (buffer-size)))))))
|
||
|
||
(defun line-number-at-pos (&optional pos)
|
||
"Return (narrowed) buffer line number at position POS.
|
||
If POS is nil, use current buffer location.
|
||
Counting starts at (point-min), so the value refers
|
||
to the contents of the accessible portion of the buffer."
|
||
(let ((opoint (or pos (point))) start)
|
||
(save-excursion
|
||
(goto-char (point-min))
|
||
(setq start (point))
|
||
(goto-char opoint)
|
||
(forward-line 0)
|
||
(1+ (count-lines start (point))))))
|
||
|
||
(defun what-cursor-position (&optional detail)
|
||
"Print info on cursor position (on screen and within buffer).
|
||
Also describe the character after point, and give its character code
|
||
in octal, decimal and hex.
|
||
|
||
For a non-ASCII multibyte character, also give its encoding in the
|
||
buffer's selected coding system if the coding system encodes the
|
||
character safely. If the character is encoded into one byte, that
|
||
code is shown in hex. If the character is encoded into more than one
|
||
byte, just \"...\" is shown.
|
||
|
||
In addition, with prefix argument, show details about that character
|
||
in *Help* buffer. See also the command `describe-char'."
|
||
(interactive "P")
|
||
(let* ((char (following-char))
|
||
(bidi-fixer
|
||
;; If the character is one of LRE, LRO, RLE, RLO, it will
|
||
;; start a directional embedding, which could completely
|
||
;; disrupt the rest of the line (e.g., RLO will display the
|
||
;; rest of the line right-to-left). So we put an invisible
|
||
;; PDF character after these characters, to end the
|
||
;; embedding, which eliminates any effects on the rest of
|
||
;; the line. For RLE and RLO we also append an invisible
|
||
;; LRM, to avoid reordering the following numerical
|
||
;; characters. For LRI/RLI/FSI we append a PDI.
|
||
(cond ((memq char '(?\x202a ?\x202d))
|
||
(propertize (string ?\x202c) 'invisible t))
|
||
((memq char '(?\x202b ?\x202e))
|
||
(propertize (string ?\x202c ?\x200e) 'invisible t))
|
||
((memq char '(?\x2066 ?\x2067 ?\x2068))
|
||
(propertize (string ?\x2069) 'invisible t))
|
||
;; Strong right-to-left characters cause reordering of
|
||
;; the following numerical characters which show the
|
||
;; codepoint, so append LRM to countermand that.
|
||
((memq (get-char-code-property char 'bidi-class) '(R AL))
|
||
(propertize (string ?\x200e) 'invisible t))
|
||
(t
|
||
"")))
|
||
(beg (point-min))
|
||
(end (point-max))
|
||
(pos (point))
|
||
(total (buffer-size))
|
||
(percent (round (* 100.0 (1- pos)) (max 1 total)))
|
||
(hscroll (if (= (window-hscroll) 0)
|
||
""
|
||
(format " Hscroll=%d" (window-hscroll))))
|
||
(col (current-column)))
|
||
(if (= pos end)
|
||
(if (or (/= beg 1) (/= end (1+ total)))
|
||
(message "point=%d of %d (%d%%) <%d-%d> column=%d%s"
|
||
pos total percent beg end col hscroll)
|
||
(message "point=%d of %d (EOB) column=%d%s"
|
||
pos total col hscroll))
|
||
(let ((coding buffer-file-coding-system)
|
||
encoded encoding-msg display-prop under-display)
|
||
(if (or (not coding)
|
||
(eq (coding-system-type coding) t))
|
||
(setq coding (default-value 'buffer-file-coding-system)))
|
||
(if (eq (char-charset char) 'eight-bit)
|
||
(setq encoding-msg
|
||
(format "(%d, #o%o, #x%x, raw-byte)" char char char))
|
||
;; Check if the character is displayed with some `display'
|
||
;; text property. In that case, set under-display to the
|
||
;; buffer substring covered by that property.
|
||
(setq display-prop (get-char-property pos 'display))
|
||
(if display-prop
|
||
(let ((to (or (next-single-char-property-change pos 'display)
|
||
(point-max))))
|
||
(if (< to (+ pos 4))
|
||
(setq under-display "")
|
||
(setq under-display "..."
|
||
to (+ pos 4)))
|
||
(setq under-display
|
||
(concat (buffer-substring-no-properties pos to)
|
||
under-display)))
|
||
(setq encoded (and (>= char 128) (encode-coding-char char coding))))
|
||
(setq encoding-msg
|
||
(if display-prop
|
||
(if (not (stringp display-prop))
|
||
(format "(%d, #o%o, #x%x, part of display \"%s\")"
|
||
char char char under-display)
|
||
(format "(%d, #o%o, #x%x, part of display \"%s\"->\"%s\")"
|
||
char char char under-display display-prop))
|
||
(if encoded
|
||
(format "(%d, #o%o, #x%x, file %s)"
|
||
char char char
|
||
(if (> (length encoded) 1)
|
||
"..."
|
||
(encoded-string-description encoded coding)))
|
||
(format "(%d, #o%o, #x%x)" char char char)))))
|
||
(if detail
|
||
;; We show the detailed information about CHAR.
|
||
(describe-char (point)))
|
||
(if (or (/= beg 1) (/= end (1+ total)))
|
||
(message "Char: %s%s %s point=%d of %d (%d%%) <%d-%d> column=%d%s"
|
||
(if (< char 256)
|
||
(single-key-description char)
|
||
(buffer-substring-no-properties (point) (1+ (point))))
|
||
bidi-fixer
|
||
encoding-msg pos total percent beg end col hscroll)
|
||
(message "Char: %s%s %s point=%d of %d (%d%%) column=%d%s"
|
||
(if enable-multibyte-characters
|
||
(if (< char 128)
|
||
(single-key-description char)
|
||
(buffer-substring-no-properties (point) (1+ (point))))
|
||
(single-key-description char))
|
||
bidi-fixer encoding-msg pos total percent col hscroll))))))
|
||
|
||
;; Initialize read-expression-map. It is defined at C level.
|
||
(defvar read-expression-map
|
||
(let ((m (make-sparse-keymap)))
|
||
(define-key m "\M-\t" 'completion-at-point)
|
||
;; Might as well bind TAB to completion, since inserting a TAB char is
|
||
;; much too rarely useful.
|
||
(define-key m "\t" 'completion-at-point)
|
||
(set-keymap-parent m minibuffer-local-map)
|
||
m))
|
||
|
||
(defun read-minibuffer (prompt &optional initial-contents)
|
||
"Return a Lisp object read using the minibuffer, unevaluated.
|
||
Prompt with PROMPT. If non-nil, optional second arg INITIAL-CONTENTS
|
||
is a string to insert in the minibuffer before reading.
|
||
\(INITIAL-CONTENTS can also be a cons of a string and an integer.
|
||
Such arguments are used as in `read-from-minibuffer'.)"
|
||
;; Used for interactive spec `x'.
|
||
(read-from-minibuffer prompt initial-contents minibuffer-local-map
|
||
t 'minibuffer-history))
|
||
|
||
(defun eval-minibuffer (prompt &optional initial-contents)
|
||
"Return value of Lisp expression read using the minibuffer.
|
||
Prompt with PROMPT. If non-nil, optional second arg INITIAL-CONTENTS
|
||
is a string to insert in the minibuffer before reading.
|
||
\(INITIAL-CONTENTS can also be a cons of a string and an integer.
|
||
Such arguments are used as in `read-from-minibuffer'.)"
|
||
;; Used for interactive spec `X'.
|
||
(eval (read--expression prompt initial-contents)))
|
||
|
||
(defvar minibuffer-completing-symbol nil
|
||
"Non-nil means completing a Lisp symbol in the minibuffer.")
|
||
(make-obsolete-variable 'minibuffer-completing-symbol nil "24.1" 'get)
|
||
|
||
(defvar minibuffer-default nil
|
||
"The current default value or list of default values in the minibuffer.
|
||
The functions `read-from-minibuffer' and `completing-read' bind
|
||
this variable locally.")
|
||
|
||
(defcustom eval-expression-print-level 4
|
||
"Value for `print-level' while printing value in `eval-expression'.
|
||
A value of nil means no limit."
|
||
:group 'lisp
|
||
:type '(choice (const :tag "No Limit" nil) integer)
|
||
:version "21.1")
|
||
|
||
(defcustom eval-expression-print-length 12
|
||
"Value for `print-length' while printing value in `eval-expression'.
|
||
A value of nil means no limit."
|
||
:group 'lisp
|
||
:type '(choice (const :tag "No Limit" nil) integer)
|
||
:version "21.1")
|
||
|
||
(defcustom eval-expression-debug-on-error t
|
||
"If non-nil set `debug-on-error' to t in `eval-expression'.
|
||
If nil, don't change the value of `debug-on-error'."
|
||
:group 'lisp
|
||
:type 'boolean
|
||
:version "21.1")
|
||
|
||
(defun eval-expression-print-format (value)
|
||
"Format VALUE as a result of evaluated expression.
|
||
Return a formatted string which is displayed in the echo area
|
||
in addition to the value printed by prin1 in functions which
|
||
display the result of expression evaluation."
|
||
(if (and (integerp value)
|
||
(or (eq standard-output t)
|
||
(zerop (prefix-numeric-value current-prefix-arg))))
|
||
(let ((char-string
|
||
(if (and (characterp value)
|
||
(char-displayable-p value))
|
||
(prin1-char value))))
|
||
(if char-string
|
||
(format " (#o%o, #x%x, %s)" value value char-string)
|
||
(format " (#o%o, #x%x)" value value)))))
|
||
|
||
(defvar eval-expression-minibuffer-setup-hook nil
|
||
"Hook run by `eval-expression' when entering the minibuffer.")
|
||
|
||
(defun read--expression (prompt &optional initial-contents)
|
||
(let ((minibuffer-completing-symbol t))
|
||
(minibuffer-with-setup-hook
|
||
(lambda ()
|
||
;; FIXME: call emacs-lisp-mode?
|
||
(add-function :before-until (local 'eldoc-documentation-function)
|
||
#'elisp-eldoc-documentation-function)
|
||
(add-hook 'completion-at-point-functions
|
||
#'elisp-completion-at-point nil t)
|
||
(run-hooks 'eval-expression-minibuffer-setup-hook))
|
||
(read-from-minibuffer prompt initial-contents
|
||
read-expression-map t
|
||
'read-expression-history))))
|
||
|
||
;; We define this, rather than making `eval' interactive,
|
||
;; for the sake of completion of names like eval-region, eval-buffer.
|
||
(defun eval-expression (exp &optional insert-value)
|
||
"Evaluate EXP and print value in the echo area.
|
||
When called interactively, read an Emacs Lisp expression and evaluate it.
|
||
Value is also consed on to front of the variable `values'.
|
||
Optional argument INSERT-VALUE non-nil (interactively, with prefix
|
||
argument) means insert the result into the current buffer instead of
|
||
printing it in the echo area.
|
||
|
||
Normally, this function truncates long output according to the value
|
||
of the variables `eval-expression-print-length' and
|
||
`eval-expression-print-level'. With a prefix argument of zero,
|
||
however, there is no such truncation. Such a prefix argument
|
||
also causes integers to be printed in several additional formats
|
||
\(octal, hexadecimal, and character).
|
||
|
||
Runs the hook `eval-expression-minibuffer-setup-hook' on entering the
|
||
minibuffer.
|
||
|
||
If `eval-expression-debug-on-error' is non-nil, which is the default,
|
||
this command arranges for all errors to enter the debugger."
|
||
(interactive
|
||
(list (read--expression "Eval: ")
|
||
current-prefix-arg))
|
||
|
||
(if (null eval-expression-debug-on-error)
|
||
(push (eval exp lexical-binding) values)
|
||
(let ((old-value (make-symbol "t")) new-value)
|
||
;; Bind debug-on-error to something unique so that we can
|
||
;; detect when evalled code changes it.
|
||
(let ((debug-on-error old-value))
|
||
(push (eval (macroexpand-all exp) lexical-binding) values)
|
||
(setq new-value debug-on-error))
|
||
;; If evalled code has changed the value of debug-on-error,
|
||
;; propagate that change to the global binding.
|
||
(unless (eq old-value new-value)
|
||
(setq debug-on-error new-value))))
|
||
|
||
(let ((print-length (and (not (zerop (prefix-numeric-value insert-value)))
|
||
eval-expression-print-length))
|
||
(print-level (and (not (zerop (prefix-numeric-value insert-value)))
|
||
eval-expression-print-level))
|
||
(deactivate-mark))
|
||
(if insert-value
|
||
(with-no-warnings
|
||
(let ((standard-output (current-buffer)))
|
||
(prog1
|
||
(prin1 (car values))
|
||
(when (zerop (prefix-numeric-value insert-value))
|
||
(let ((str (eval-expression-print-format (car values))))
|
||
(if str (princ str)))))))
|
||
(prog1
|
||
(prin1 (car values) t)
|
||
(let ((str (eval-expression-print-format (car values))))
|
||
(if str (princ str t)))))))
|
||
|
||
(defun edit-and-eval-command (prompt command)
|
||
"Prompting with PROMPT, let user edit COMMAND and eval result.
|
||
COMMAND is a Lisp expression. Let user edit that expression in
|
||
the minibuffer, then read and evaluate the result."
|
||
(let ((command
|
||
(let ((print-level nil)
|
||
(minibuffer-history-sexp-flag (1+ (minibuffer-depth))))
|
||
(unwind-protect
|
||
(read-from-minibuffer prompt
|
||
(prin1-to-string command)
|
||
read-expression-map t
|
||
'command-history)
|
||
;; If command was added to command-history as a string,
|
||
;; get rid of that. We want only evaluable expressions there.
|
||
(if (stringp (car command-history))
|
||
(setq command-history (cdr command-history)))))))
|
||
|
||
;; If command to be redone does not match front of history,
|
||
;; add it to the history.
|
||
(or (equal command (car command-history))
|
||
(setq command-history (cons command command-history)))
|
||
(eval command)))
|
||
|
||
(defun repeat-complex-command (arg)
|
||
"Edit and re-evaluate last complex command, or ARGth from last.
|
||
A complex command is one which used the minibuffer.
|
||
The command is placed in the minibuffer as a Lisp form for editing.
|
||
The result is executed, repeating the command as changed.
|
||
If the command has been changed or is not the most recent previous
|
||
command it is added to the front of the command history.
|
||
You can use the minibuffer history commands \
|
||
\\<minibuffer-local-map>\\[next-history-element] and \\[previous-history-element]
|
||
to get different commands to edit and resubmit."
|
||
(interactive "p")
|
||
(let ((elt (nth (1- arg) command-history))
|
||
newcmd)
|
||
(if elt
|
||
(progn
|
||
(setq newcmd
|
||
(let ((print-level nil)
|
||
(minibuffer-history-position arg)
|
||
(minibuffer-history-sexp-flag (1+ (minibuffer-depth))))
|
||
(unwind-protect
|
||
(read-from-minibuffer
|
||
"Redo: " (prin1-to-string elt) read-expression-map t
|
||
(cons 'command-history arg))
|
||
|
||
;; If command was added to command-history as a
|
||
;; string, get rid of that. We want only
|
||
;; evaluable expressions there.
|
||
(if (stringp (car command-history))
|
||
(setq command-history (cdr command-history))))))
|
||
|
||
;; If command to be redone does not match front of history,
|
||
;; add it to the history.
|
||
(or (equal newcmd (car command-history))
|
||
(setq command-history (cons newcmd command-history)))
|
||
(apply #'funcall-interactively
|
||
(car newcmd)
|
||
(mapcar (lambda (e) (eval e t)) (cdr newcmd))))
|
||
(if command-history
|
||
(error "Argument %d is beyond length of command history" arg)
|
||
(error "There are no previous complex commands to repeat")))))
|
||
|
||
|
||
(defvar extended-command-history nil)
|
||
(defvar execute-extended-command--last-typed nil)
|
||
|
||
(defun read-extended-command ()
|
||
"Read command name to invoke in `execute-extended-command'."
|
||
(minibuffer-with-setup-hook
|
||
(lambda ()
|
||
(add-hook 'post-self-insert-hook
|
||
(lambda ()
|
||
(setq execute-extended-command--last-typed
|
||
(minibuffer-contents)))
|
||
nil 'local)
|
||
(set (make-local-variable 'minibuffer-default-add-function)
|
||
(lambda ()
|
||
;; Get a command name at point in the original buffer
|
||
;; to propose it after M-n.
|
||
(with-current-buffer (window-buffer (minibuffer-selected-window))
|
||
(and (commandp (function-called-at-point))
|
||
(format "%S" (function-called-at-point)))))))
|
||
;; Read a string, completing from and restricting to the set of
|
||
;; all defined commands. Don't provide any initial input.
|
||
;; Save the command read on the extended-command history list.
|
||
(completing-read
|
||
(concat (cond
|
||
((eq current-prefix-arg '-) "- ")
|
||
((and (consp current-prefix-arg)
|
||
(eq (car current-prefix-arg) 4)) "C-u ")
|
||
((and (consp current-prefix-arg)
|
||
(integerp (car current-prefix-arg)))
|
||
(format "%d " (car current-prefix-arg)))
|
||
((integerp current-prefix-arg)
|
||
(format "%d " current-prefix-arg)))
|
||
;; This isn't strictly correct if `execute-extended-command'
|
||
;; is bound to anything else (e.g. [menu]).
|
||
;; It could use (key-description (this-single-command-keys)),
|
||
;; but actually a prompt other than "M-x" would be confusing,
|
||
;; because "M-x" is a well-known prompt to read a command
|
||
;; and it serves as a shorthand for "Extended command: ".
|
||
"M-x ")
|
||
(lambda (string pred action)
|
||
(let ((pred
|
||
(if (memq action '(nil t))
|
||
;; Exclude obsolete commands from completions.
|
||
(lambda (sym)
|
||
(and (funcall pred sym)
|
||
(or (equal string (symbol-name sym))
|
||
(not (get sym 'byte-obsolete-info)))))
|
||
pred)))
|
||
(complete-with-action action obarray string pred)))
|
||
#'commandp t nil 'extended-command-history)))
|
||
|
||
(defcustom suggest-key-bindings t
|
||
"Non-nil means show the equivalent key-binding when M-x command has one.
|
||
The value can be a length of time to show the message for.
|
||
If the value is non-nil and not a number, we wait 2 seconds."
|
||
:group 'keyboard
|
||
:type '(choice (const :tag "off" nil)
|
||
(integer :tag "time" 2)
|
||
(other :tag "on")))
|
||
|
||
(defun execute-extended-command--shorter-1 (name length)
|
||
(cond
|
||
((zerop length) (list ""))
|
||
((equal name "") nil)
|
||
(t
|
||
(nconc (mapcar (lambda (s) (concat (substring name 0 1) s))
|
||
(execute-extended-command--shorter-1
|
||
(substring name 1) (1- length)))
|
||
(when (string-match "\\`\\(-\\)?[^-]*" name)
|
||
(execute-extended-command--shorter-1
|
||
(substring name (match-end 0)) length))))))
|
||
|
||
(defun execute-extended-command--shorter (name typed)
|
||
(let ((candidates '())
|
||
(max (length typed))
|
||
(len 1)
|
||
binding)
|
||
(while (and (not binding)
|
||
(progn
|
||
(unless candidates
|
||
(setq len (1+ len))
|
||
(setq candidates (execute-extended-command--shorter-1
|
||
name len)))
|
||
;; Don't show the help message if the binding isn't
|
||
;; significantly shorter than the M-x command the user typed.
|
||
(< len (- max 5))))
|
||
(let ((candidate (pop candidates)))
|
||
(when (equal name
|
||
(car-safe (completion-try-completion
|
||
candidate obarray 'commandp len)))
|
||
(setq binding candidate))))
|
||
binding))
|
||
|
||
(defun execute-extended-command (prefixarg &optional command-name typed)
|
||
;; Based on Fexecute_extended_command in keyboard.c of Emacs.
|
||
;; Aaron S. Hawley <aaron.s.hawley(at)gmail.com> 2009-08-24
|
||
"Read a command name, then read the arguments and call the command.
|
||
To pass a prefix argument to the command you are
|
||
invoking, give a prefix argument to `execute-extended-command'."
|
||
(declare (interactive-only command-execute))
|
||
;; FIXME: Remember the actual text typed by the user before completion,
|
||
;; so that we don't later on suggest the same shortening.
|
||
(interactive
|
||
(let ((execute-extended-command--last-typed nil))
|
||
(list current-prefix-arg
|
||
(read-extended-command)
|
||
execute-extended-command--last-typed)))
|
||
;; Emacs<24 calling-convention was with a single `prefixarg' argument.
|
||
(unless command-name
|
||
(let ((current-prefix-arg prefixarg) ; for prompt
|
||
(execute-extended-command--last-typed nil))
|
||
(setq command-name (read-extended-command))
|
||
(setq typed execute-extended-command--last-typed)))
|
||
(let* ((function (and (stringp command-name) (intern-soft command-name)))
|
||
(binding (and suggest-key-bindings
|
||
(not executing-kbd-macro)
|
||
(where-is-internal function overriding-local-map t))))
|
||
(unless (commandp function)
|
||
(error "`%s' is not a valid command name" command-name))
|
||
(setq this-command function)
|
||
;; Normally `real-this-command' should never be changed, but here we really
|
||
;; want to pretend that M-x <cmd> RET is nothing more than a "key
|
||
;; binding" for <cmd>, so the command the user really wanted to run is
|
||
;; `function' and not `execute-extended-command'. The difference is
|
||
;; visible in cases such as M-x <cmd> RET and then C-x z (bug#11506).
|
||
(setq real-this-command function)
|
||
(let ((prefix-arg prefixarg))
|
||
(command-execute function 'record))
|
||
;; If enabled, show which key runs this command.
|
||
;; But first wait, and skip the message if there is input.
|
||
(let* ((waited
|
||
;; If this command displayed something in the echo area;
|
||
;; wait a few seconds, then display our suggestion message.
|
||
;; FIXME: Wait *after* running post-command-hook!
|
||
;; FIXME: Don't wait if execute-extended-command--shorter won't
|
||
;; find a better answer anyway!
|
||
(when suggest-key-bindings
|
||
(sit-for (cond
|
||
((zerop (length (current-message))) 0)
|
||
((numberp suggest-key-bindings) suggest-key-bindings)
|
||
(t 2))))))
|
||
(when (and waited (not (consp unread-command-events)))
|
||
(unless (or binding executing-kbd-macro (not (symbolp function))
|
||
(<= (length (symbol-name function)) 2))
|
||
;; There's no binding for CMD. Let's try and find the shortest
|
||
;; string to use in M-x.
|
||
;; FIXME: Can be slow. Cache it maybe?
|
||
(while-no-input
|
||
(setq binding (execute-extended-command--shorter
|
||
(symbol-name function) typed))))
|
||
(when binding
|
||
(with-temp-message
|
||
(format-message "You can run the command `%s' with %s"
|
||
function
|
||
(if (stringp binding)
|
||
(concat "M-x " binding " RET")
|
||
(key-description binding)))
|
||
(sit-for (if (numberp suggest-key-bindings)
|
||
suggest-key-bindings
|
||
2))))))))
|
||
|
||
(defun command-execute (cmd &optional record-flag keys special)
|
||
;; BEWARE: Called directly from the C code.
|
||
"Execute CMD as an editor command.
|
||
CMD must be a symbol that satisfies the `commandp' predicate.
|
||
Optional second arg RECORD-FLAG non-nil
|
||
means unconditionally put this command in the variable `command-history'.
|
||
Otherwise, that is done only if an arg is read using the minibuffer.
|
||
The argument KEYS specifies the value to use instead of (this-command-keys)
|
||
when reading the arguments; if it is nil, (this-command-keys) is used.
|
||
The argument SPECIAL, if non-nil, means that this command is executing
|
||
a special event, so ignore the prefix argument and don't clear it."
|
||
(setq debug-on-next-call nil)
|
||
(let ((prefixarg (unless special
|
||
;; FIXME: This should probably be done around
|
||
;; pre-command-hook rather than here!
|
||
(prog1 prefix-arg
|
||
(setq current-prefix-arg prefix-arg)
|
||
(setq prefix-arg nil)
|
||
(when current-prefix-arg
|
||
(prefix-command-update))))))
|
||
(if (and (symbolp cmd)
|
||
(get cmd 'disabled)
|
||
disabled-command-function)
|
||
;; FIXME: Weird calling convention!
|
||
(run-hooks 'disabled-command-function)
|
||
(let ((final cmd))
|
||
(while
|
||
(progn
|
||
(setq final (indirect-function final))
|
||
(if (autoloadp final)
|
||
(setq final (autoload-do-load final cmd)))))
|
||
(cond
|
||
((arrayp final)
|
||
;; If requested, place the macro in the command history. For
|
||
;; other sorts of commands, call-interactively takes care of this.
|
||
(when record-flag
|
||
(push `(execute-kbd-macro ,final ,prefixarg) command-history)
|
||
;; Don't keep command history around forever.
|
||
(when (and (numberp history-length) (> history-length 0))
|
||
(let ((cell (nthcdr history-length command-history)))
|
||
(if (consp cell) (setcdr cell nil)))))
|
||
(execute-kbd-macro final prefixarg))
|
||
(t
|
||
;; Pass `cmd' rather than `final', for the backtrace's sake.
|
||
(prog1 (call-interactively cmd record-flag keys)
|
||
(when (and (symbolp cmd)
|
||
(get cmd 'byte-obsolete-info)
|
||
(not (get cmd 'command-execute-obsolete-warned)))
|
||
(put cmd 'command-execute-obsolete-warned t)
|
||
(message "%s" (macroexp--obsolete-warning
|
||
cmd (get cmd 'byte-obsolete-info) "command"))))))))))
|
||
|
||
(defvar minibuffer-history nil
|
||
"Default minibuffer history list.
|
||
This is used for all minibuffer input
|
||
except when an alternate history list is specified.
|
||
|
||
Maximum length of the history list is determined by the value
|
||
of `history-length', which see.")
|
||
(defvar minibuffer-history-sexp-flag nil
|
||
"Control whether history list elements are expressions or strings.
|
||
If the value of this variable equals current minibuffer depth,
|
||
they are expressions; otherwise they are strings.
|
||
\(That convention is designed to do the right thing for
|
||
recursive uses of the minibuffer.)")
|
||
(setq minibuffer-history-variable 'minibuffer-history)
|
||
(setq minibuffer-history-position nil) ;; Defvar is in C code.
|
||
(defvar minibuffer-history-search-history nil)
|
||
|
||
(defvar minibuffer-text-before-history nil
|
||
"Text that was in this minibuffer before any history commands.
|
||
This is nil if there have not yet been any history commands
|
||
in this use of the minibuffer.")
|
||
|
||
(add-hook 'minibuffer-setup-hook 'minibuffer-history-initialize)
|
||
|
||
(defun minibuffer-history-initialize ()
|
||
(setq minibuffer-text-before-history nil))
|
||
|
||
(defun minibuffer-avoid-prompt (_new _old)
|
||
"A point-motion hook for the minibuffer, that moves point out of the prompt."
|
||
(declare (obsolete cursor-intangible-mode "25.1"))
|
||
(constrain-to-field nil (point-max)))
|
||
|
||
(defcustom minibuffer-history-case-insensitive-variables nil
|
||
"Minibuffer history variables for which matching should ignore case.
|
||
If a history variable is a member of this list, then the
|
||
\\[previous-matching-history-element] and \\[next-matching-history-element]\
|
||
commands ignore case when searching it, regardless of `case-fold-search'."
|
||
:type '(repeat variable)
|
||
:group 'minibuffer)
|
||
|
||
(defun previous-matching-history-element (regexp n)
|
||
"Find the previous history element that matches REGEXP.
|
||
\(Previous history elements refer to earlier actions.)
|
||
With prefix argument N, search for Nth previous match.
|
||
If N is negative, find the next or Nth next match.
|
||
Normally, history elements are matched case-insensitively if
|
||
`case-fold-search' is non-nil, but an uppercase letter in REGEXP
|
||
makes the search case-sensitive.
|
||
See also `minibuffer-history-case-insensitive-variables'."
|
||
(interactive
|
||
(let* ((enable-recursive-minibuffers t)
|
||
(regexp (read-from-minibuffer "Previous element matching (regexp): "
|
||
nil
|
||
minibuffer-local-map
|
||
nil
|
||
'minibuffer-history-search-history
|
||
(car minibuffer-history-search-history))))
|
||
;; Use the last regexp specified, by default, if input is empty.
|
||
(list (if (string= regexp "")
|
||
(if minibuffer-history-search-history
|
||
(car minibuffer-history-search-history)
|
||
(user-error "No previous history search regexp"))
|
||
regexp)
|
||
(prefix-numeric-value current-prefix-arg))))
|
||
(unless (zerop n)
|
||
(if (and (zerop minibuffer-history-position)
|
||
(null minibuffer-text-before-history))
|
||
(setq minibuffer-text-before-history
|
||
(minibuffer-contents-no-properties)))
|
||
(let ((history (symbol-value minibuffer-history-variable))
|
||
(case-fold-search
|
||
(if (isearch-no-upper-case-p regexp t) ; assume isearch.el is dumped
|
||
;; On some systems, ignore case for file names.
|
||
(if (memq minibuffer-history-variable
|
||
minibuffer-history-case-insensitive-variables)
|
||
t
|
||
;; Respect the user's setting for case-fold-search:
|
||
case-fold-search)
|
||
nil))
|
||
prevpos
|
||
match-string
|
||
match-offset
|
||
(pos minibuffer-history-position))
|
||
(while (/= n 0)
|
||
(setq prevpos pos)
|
||
(setq pos (min (max 1 (+ pos (if (< n 0) -1 1))) (length history)))
|
||
(when (= pos prevpos)
|
||
(user-error (if (= pos 1)
|
||
"No later matching history item"
|
||
"No earlier matching history item")))
|
||
(setq match-string
|
||
(if (eq minibuffer-history-sexp-flag (minibuffer-depth))
|
||
(let ((print-level nil))
|
||
(prin1-to-string (nth (1- pos) history)))
|
||
(nth (1- pos) history)))
|
||
(setq match-offset
|
||
(if (< n 0)
|
||
(and (string-match regexp match-string)
|
||
(match-end 0))
|
||
(and (string-match (concat ".*\\(" regexp "\\)") match-string)
|
||
(match-beginning 1))))
|
||
(when match-offset
|
||
(setq n (+ n (if (< n 0) 1 -1)))))
|
||
(setq minibuffer-history-position pos)
|
||
(goto-char (point-max))
|
||
(delete-minibuffer-contents)
|
||
(insert match-string)
|
||
(goto-char (+ (minibuffer-prompt-end) match-offset))))
|
||
(if (memq (car (car command-history)) '(previous-matching-history-element
|
||
next-matching-history-element))
|
||
(setq command-history (cdr command-history))))
|
||
|
||
(defun next-matching-history-element (regexp n)
|
||
"Find the next history element that matches REGEXP.
|
||
\(The next history element refers to a more recent action.)
|
||
With prefix argument N, search for Nth next match.
|
||
If N is negative, find the previous or Nth previous match.
|
||
Normally, history elements are matched case-insensitively if
|
||
`case-fold-search' is non-nil, but an uppercase letter in REGEXP
|
||
makes the search case-sensitive."
|
||
(interactive
|
||
(let* ((enable-recursive-minibuffers t)
|
||
(regexp (read-from-minibuffer "Next element matching (regexp): "
|
||
nil
|
||
minibuffer-local-map
|
||
nil
|
||
'minibuffer-history-search-history
|
||
(car minibuffer-history-search-history))))
|
||
;; Use the last regexp specified, by default, if input is empty.
|
||
(list (if (string= regexp "")
|
||
(if minibuffer-history-search-history
|
||
(car minibuffer-history-search-history)
|
||
(user-error "No previous history search regexp"))
|
||
regexp)
|
||
(prefix-numeric-value current-prefix-arg))))
|
||
(previous-matching-history-element regexp (- n)))
|
||
|
||
(defvar minibuffer-temporary-goal-position nil)
|
||
|
||
(defvar minibuffer-default-add-function 'minibuffer-default-add-completions
|
||
"Function run by `goto-history-element' before consuming default values.
|
||
This is useful to dynamically add more elements to the list of default values
|
||
when `goto-history-element' reaches the end of this list.
|
||
Before calling this function `goto-history-element' sets the variable
|
||
`minibuffer-default-add-done' to t, so it will call this function only
|
||
once. In special cases, when this function needs to be called more
|
||
than once, it can set `minibuffer-default-add-done' to nil explicitly,
|
||
overriding the setting of this variable to t in `goto-history-element'.")
|
||
|
||
(defvar minibuffer-default-add-done nil
|
||
"When nil, add more elements to the end of the list of default values.
|
||
The value nil causes `goto-history-element' to add more elements to
|
||
the list of defaults when it reaches the end of this list. It does
|
||
this by calling a function defined by `minibuffer-default-add-function'.")
|
||
|
||
(make-variable-buffer-local 'minibuffer-default-add-done)
|
||
|
||
(defun minibuffer-default-add-completions ()
|
||
"Return a list of all completions without the default value.
|
||
This function is used to add all elements of the completion table to
|
||
the end of the list of defaults just after the default value."
|
||
(let ((def minibuffer-default)
|
||
(all (all-completions ""
|
||
minibuffer-completion-table
|
||
minibuffer-completion-predicate)))
|
||
(if (listp def)
|
||
(append def all)
|
||
(cons def (delete def all)))))
|
||
|
||
(defun goto-history-element (nabs)
|
||
"Puts element of the minibuffer history in the minibuffer.
|
||
The argument NABS specifies the absolute history position."
|
||
(interactive "p")
|
||
(when (and (not minibuffer-default-add-done)
|
||
(functionp minibuffer-default-add-function)
|
||
(< nabs (- (if (listp minibuffer-default)
|
||
(length minibuffer-default)
|
||
1))))
|
||
(setq minibuffer-default-add-done t
|
||
minibuffer-default (funcall minibuffer-default-add-function)))
|
||
(let ((minimum (if minibuffer-default
|
||
(- (if (listp minibuffer-default)
|
||
(length minibuffer-default)
|
||
1))
|
||
0))
|
||
elt minibuffer-returned-to-present)
|
||
(if (and (zerop minibuffer-history-position)
|
||
(null minibuffer-text-before-history))
|
||
(setq minibuffer-text-before-history
|
||
(minibuffer-contents-no-properties)))
|
||
(if (< nabs minimum)
|
||
(user-error (if minibuffer-default
|
||
"End of defaults; no next item"
|
||
"End of history; no default available")))
|
||
(if (> nabs (if (listp (symbol-value minibuffer-history-variable))
|
||
(length (symbol-value minibuffer-history-variable))
|
||
0))
|
||
(user-error "Beginning of history; no preceding item"))
|
||
(unless (memq last-command '(next-history-element
|
||
previous-history-element))
|
||
(let ((prompt-end (minibuffer-prompt-end)))
|
||
(set (make-local-variable 'minibuffer-temporary-goal-position)
|
||
(cond ((<= (point) prompt-end) prompt-end)
|
||
((eobp) nil)
|
||
(t (point))))))
|
||
(goto-char (point-max))
|
||
(delete-minibuffer-contents)
|
||
(setq minibuffer-history-position nabs)
|
||
(cond ((< nabs 0)
|
||
(setq elt (if (listp minibuffer-default)
|
||
(nth (1- (abs nabs)) minibuffer-default)
|
||
minibuffer-default)))
|
||
((= nabs 0)
|
||
(setq elt (or minibuffer-text-before-history ""))
|
||
(setq minibuffer-returned-to-present t)
|
||
(setq minibuffer-text-before-history nil))
|
||
(t (setq elt (nth (1- minibuffer-history-position)
|
||
(symbol-value minibuffer-history-variable)))))
|
||
(insert
|
||
(if (and (eq minibuffer-history-sexp-flag (minibuffer-depth))
|
||
(not minibuffer-returned-to-present))
|
||
(let ((print-level nil))
|
||
(prin1-to-string elt))
|
||
elt))
|
||
(goto-char (or minibuffer-temporary-goal-position (point-max)))))
|
||
|
||
(defun next-history-element (n)
|
||
"Puts next element of the minibuffer history in the minibuffer.
|
||
With argument N, it uses the Nth following element."
|
||
(interactive "p")
|
||
(or (zerop n)
|
||
(goto-history-element (- minibuffer-history-position n))))
|
||
|
||
(defun previous-history-element (n)
|
||
"Puts previous element of the minibuffer history in the minibuffer.
|
||
With argument N, it uses the Nth previous element."
|
||
(interactive "p")
|
||
(or (zerop n)
|
||
(goto-history-element (+ minibuffer-history-position n))))
|
||
|
||
(defun next-line-or-history-element (&optional arg)
|
||
"Move cursor vertically down ARG lines, or to the next history element.
|
||
When point moves over the bottom line of multi-line minibuffer, puts ARGth
|
||
next element of the minibuffer history in the minibuffer."
|
||
(interactive "^p")
|
||
(or arg (setq arg 1))
|
||
(let* ((old-point (point))
|
||
;; Remember the original goal column of possibly multi-line input
|
||
;; excluding the length of the prompt on the first line.
|
||
(prompt-end (minibuffer-prompt-end))
|
||
(old-column (unless (and (eolp) (> (point) prompt-end))
|
||
(if (= (line-number-at-pos) 1)
|
||
(max (- (current-column) (1- prompt-end)) 0)
|
||
(current-column)))))
|
||
(condition-case nil
|
||
(with-no-warnings
|
||
(next-line arg))
|
||
(end-of-buffer
|
||
;; Restore old position since `line-move-visual' moves point to
|
||
;; the end of the line when it fails to go to the next line.
|
||
(goto-char old-point)
|
||
(next-history-element arg)
|
||
;; Restore the original goal column on the last line
|
||
;; of possibly multi-line input.
|
||
(goto-char (point-max))
|
||
(when old-column
|
||
(if (= (line-number-at-pos) 1)
|
||
(move-to-column (+ old-column (1- (minibuffer-prompt-end))))
|
||
(move-to-column old-column)))))))
|
||
|
||
(defun previous-line-or-history-element (&optional arg)
|
||
"Move cursor vertically up ARG lines, or to the previous history element.
|
||
When point moves over the top line of multi-line minibuffer, puts ARGth
|
||
previous element of the minibuffer history in the minibuffer."
|
||
(interactive "^p")
|
||
(or arg (setq arg 1))
|
||
(let* ((old-point (point))
|
||
;; Remember the original goal column of possibly multi-line input
|
||
;; excluding the length of the prompt on the first line.
|
||
(prompt-end (minibuffer-prompt-end))
|
||
(old-column (unless (and (eolp) (> (point) prompt-end))
|
||
(if (= (line-number-at-pos) 1)
|
||
(max (- (current-column) (1- prompt-end)) 0)
|
||
(current-column)))))
|
||
(condition-case nil
|
||
(with-no-warnings
|
||
(previous-line arg))
|
||
(beginning-of-buffer
|
||
;; Restore old position since `line-move-visual' moves point to
|
||
;; the beginning of the line when it fails to go to the previous line.
|
||
(goto-char old-point)
|
||
(previous-history-element arg)
|
||
;; Restore the original goal column on the first line
|
||
;; of possibly multi-line input.
|
||
(goto-char (minibuffer-prompt-end))
|
||
(if old-column
|
||
(if (= (line-number-at-pos) 1)
|
||
(move-to-column (+ old-column (1- (minibuffer-prompt-end))))
|
||
(move-to-column old-column))
|
||
(goto-char (line-end-position)))))))
|
||
|
||
(defun next-complete-history-element (n)
|
||
"Get next history element which completes the minibuffer before the point.
|
||
The contents of the minibuffer after the point are deleted, and replaced
|
||
by the new completion."
|
||
(interactive "p")
|
||
(let ((point-at-start (point)))
|
||
(next-matching-history-element
|
||
(concat
|
||
"^" (regexp-quote (buffer-substring (minibuffer-prompt-end) (point))))
|
||
n)
|
||
;; next-matching-history-element always puts us at (point-min).
|
||
;; Move to the position we were at before changing the buffer contents.
|
||
;; This is still sensible, because the text before point has not changed.
|
||
(goto-char point-at-start)))
|
||
|
||
(defun previous-complete-history-element (n)
|
||
"\
|
||
Get previous history element which completes the minibuffer before the point.
|
||
The contents of the minibuffer after the point are deleted, and replaced
|
||
by the new completion."
|
||
(interactive "p")
|
||
(next-complete-history-element (- n)))
|
||
|
||
;; For compatibility with the old subr of the same name.
|
||
(defun minibuffer-prompt-width ()
|
||
"Return the display width of the minibuffer prompt.
|
||
Return 0 if current buffer is not a minibuffer."
|
||
;; Return the width of everything before the field at the end of
|
||
;; the buffer; this should be 0 for normal buffers.
|
||
(1- (minibuffer-prompt-end)))
|
||
|
||
;; isearch minibuffer history
|
||
(add-hook 'minibuffer-setup-hook 'minibuffer-history-isearch-setup)
|
||
|
||
(defvar minibuffer-history-isearch-message-overlay)
|
||
(make-variable-buffer-local 'minibuffer-history-isearch-message-overlay)
|
||
|
||
(defun minibuffer-history-isearch-setup ()
|
||
"Set up a minibuffer for using isearch to search the minibuffer history.
|
||
Intended to be added to `minibuffer-setup-hook'."
|
||
(set (make-local-variable 'isearch-search-fun-function)
|
||
'minibuffer-history-isearch-search)
|
||
(set (make-local-variable 'isearch-message-function)
|
||
'minibuffer-history-isearch-message)
|
||
(set (make-local-variable 'isearch-wrap-function)
|
||
'minibuffer-history-isearch-wrap)
|
||
(set (make-local-variable 'isearch-push-state-function)
|
||
'minibuffer-history-isearch-push-state)
|
||
(add-hook 'isearch-mode-end-hook 'minibuffer-history-isearch-end nil t))
|
||
|
||
(defun minibuffer-history-isearch-end ()
|
||
"Clean up the minibuffer after terminating isearch in the minibuffer."
|
||
(if minibuffer-history-isearch-message-overlay
|
||
(delete-overlay minibuffer-history-isearch-message-overlay)))
|
||
|
||
(defun minibuffer-history-isearch-search ()
|
||
"Return the proper search function, for isearch in minibuffer history."
|
||
(lambda (string bound noerror)
|
||
(let ((search-fun
|
||
;; Use standard functions to search within minibuffer text
|
||
(isearch-search-fun-default))
|
||
found)
|
||
;; Avoid lazy-highlighting matches in the minibuffer prompt when
|
||
;; searching forward. Lazy-highlight calls this lambda with the
|
||
;; bound arg, so skip the minibuffer prompt.
|
||
(if (and bound isearch-forward (< (point) (minibuffer-prompt-end)))
|
||
(goto-char (minibuffer-prompt-end)))
|
||
(or
|
||
;; 1. First try searching in the initial minibuffer text
|
||
(funcall search-fun string
|
||
(if isearch-forward bound (minibuffer-prompt-end))
|
||
noerror)
|
||
;; 2. If the above search fails, start putting next/prev history
|
||
;; elements in the minibuffer successively, and search the string
|
||
;; in them. Do this only when bound is nil (i.e. not while
|
||
;; lazy-highlighting search strings in the current minibuffer text).
|
||
(unless bound
|
||
(condition-case nil
|
||
(progn
|
||
(while (not found)
|
||
(cond (isearch-forward
|
||
(next-history-element 1)
|
||
(goto-char (minibuffer-prompt-end)))
|
||
(t
|
||
(previous-history-element 1)
|
||
(goto-char (point-max))))
|
||
(setq isearch-barrier (point) isearch-opoint (point))
|
||
;; After putting the next/prev history element, search
|
||
;; the string in them again, until next-history-element
|
||
;; or previous-history-element raises an error at the
|
||
;; beginning/end of history.
|
||
(setq found (funcall search-fun string
|
||
(unless isearch-forward
|
||
;; For backward search, don't search
|
||
;; in the minibuffer prompt
|
||
(minibuffer-prompt-end))
|
||
noerror)))
|
||
;; Return point of the new search result
|
||
(point))
|
||
;; Return nil when next(prev)-history-element fails
|
||
(error nil)))))))
|
||
|
||
(defun minibuffer-history-isearch-message (&optional c-q-hack ellipsis)
|
||
"Display the minibuffer history search prompt.
|
||
If there are no search errors, this function displays an overlay with
|
||
the isearch prompt which replaces the original minibuffer prompt.
|
||
Otherwise, it displays the standard isearch message returned from
|
||
the function `isearch-message'."
|
||
(if (not (and (minibufferp) isearch-success (not isearch-error)))
|
||
;; Use standard function `isearch-message' when not in the minibuffer,
|
||
;; or search fails, or has an error (like incomplete regexp).
|
||
;; This function overwrites minibuffer text with isearch message,
|
||
;; so it's possible to see what is wrong in the search string.
|
||
(isearch-message c-q-hack ellipsis)
|
||
;; Otherwise, put the overlay with the standard isearch prompt over
|
||
;; the initial minibuffer prompt.
|
||
(if (overlayp minibuffer-history-isearch-message-overlay)
|
||
(move-overlay minibuffer-history-isearch-message-overlay
|
||
(point-min) (minibuffer-prompt-end))
|
||
(setq minibuffer-history-isearch-message-overlay
|
||
(make-overlay (point-min) (minibuffer-prompt-end)))
|
||
(overlay-put minibuffer-history-isearch-message-overlay 'evaporate t))
|
||
(overlay-put minibuffer-history-isearch-message-overlay
|
||
'display (isearch-message-prefix c-q-hack ellipsis))
|
||
;; And clear any previous isearch message.
|
||
(message "")))
|
||
|
||
(defun minibuffer-history-isearch-wrap ()
|
||
"Wrap the minibuffer history search when search fails.
|
||
Move point to the first history element for a forward search,
|
||
or to the last history element for a backward search."
|
||
;; When `minibuffer-history-isearch-search' fails on reaching the
|
||
;; beginning/end of the history, wrap the search to the first/last
|
||
;; minibuffer history element.
|
||
(if isearch-forward
|
||
(goto-history-element (length (symbol-value minibuffer-history-variable)))
|
||
(goto-history-element 0))
|
||
(setq isearch-success t)
|
||
(goto-char (if isearch-forward (minibuffer-prompt-end) (point-max))))
|
||
|
||
(defun minibuffer-history-isearch-push-state ()
|
||
"Save a function restoring the state of minibuffer history search.
|
||
Save `minibuffer-history-position' to the additional state parameter
|
||
in the search status stack."
|
||
(let ((pos minibuffer-history-position))
|
||
(lambda (cmd)
|
||
(minibuffer-history-isearch-pop-state cmd pos))))
|
||
|
||
(defun minibuffer-history-isearch-pop-state (_cmd hist-pos)
|
||
"Restore the minibuffer history search state.
|
||
Go to the history element by the absolute history position HIST-POS."
|
||
(goto-history-element hist-pos))
|
||
|
||
|
||
;Put this on C-x u, so we can force that rather than C-_ into startup msg
|
||
(define-obsolete-function-alias 'advertised-undo 'undo "23.2")
|
||
|
||
(defconst undo-equiv-table (make-hash-table :test 'eq :weakness t)
|
||
"Table mapping redo records to the corresponding undo one.
|
||
A redo record for undo-in-region maps to t.
|
||
A redo record for ordinary undo maps to the following (earlier) undo.")
|
||
|
||
(defvar undo-in-region nil
|
||
"Non-nil if `pending-undo-list' is not just a tail of `buffer-undo-list'.")
|
||
|
||
(defvar undo-no-redo nil
|
||
"If t, `undo' doesn't go through redo entries.")
|
||
|
||
(defvar pending-undo-list nil
|
||
"Within a run of consecutive undo commands, list remaining to be undone.
|
||
If t, we undid all the way to the end of it.")
|
||
|
||
(defun undo (&optional arg)
|
||
"Undo some previous changes.
|
||
Repeat this command to undo more changes.
|
||
A numeric ARG serves as a repeat count.
|
||
|
||
In Transient Mark mode when the mark is active, only undo changes within
|
||
the current region. Similarly, when not in Transient Mark mode, just \\[universal-argument]
|
||
as an argument limits undo to changes within the current region."
|
||
(interactive "*P")
|
||
;; Make last-command indicate for the next command that this was an undo.
|
||
;; That way, another undo will undo more.
|
||
;; If we get to the end of the undo history and get an error,
|
||
;; another undo command will find the undo history empty
|
||
;; and will get another error. To begin undoing the undos,
|
||
;; you must type some other command.
|
||
(let* ((modified (buffer-modified-p))
|
||
;; For an indirect buffer, look in the base buffer for the
|
||
;; auto-save data.
|
||
(base-buffer (or (buffer-base-buffer) (current-buffer)))
|
||
(recent-save (with-current-buffer base-buffer
|
||
(recent-auto-save-p)))
|
||
message)
|
||
;; If we get an error in undo-start,
|
||
;; the next command should not be a "consecutive undo".
|
||
;; So set `this-command' to something other than `undo'.
|
||
(setq this-command 'undo-start)
|
||
|
||
(unless (and (eq last-command 'undo)
|
||
(or (eq pending-undo-list t)
|
||
;; If something (a timer or filter?) changed the buffer
|
||
;; since the previous command, don't continue the undo seq.
|
||
(let ((list buffer-undo-list))
|
||
(while (eq (car list) nil)
|
||
(setq list (cdr list)))
|
||
;; If the last undo record made was made by undo
|
||
;; it shows nothing else happened in between.
|
||
(gethash list undo-equiv-table))))
|
||
(setq undo-in-region
|
||
(or (region-active-p) (and arg (not (numberp arg)))))
|
||
(if undo-in-region
|
||
(undo-start (region-beginning) (region-end))
|
||
(undo-start))
|
||
;; get rid of initial undo boundary
|
||
(undo-more 1))
|
||
;; If we got this far, the next command should be a consecutive undo.
|
||
(setq this-command 'undo)
|
||
;; Check to see whether we're hitting a redo record, and if
|
||
;; so, ask the user whether she wants to skip the redo/undo pair.
|
||
(let ((equiv (gethash pending-undo-list undo-equiv-table)))
|
||
(or (eq (selected-window) (minibuffer-window))
|
||
(setq message (format "%s%s!"
|
||
(if (or undo-no-redo (not equiv))
|
||
"Undo" "Redo")
|
||
(if undo-in-region " in region" ""))))
|
||
(when (and (consp equiv) undo-no-redo)
|
||
;; The equiv entry might point to another redo record if we have done
|
||
;; undo-redo-undo-redo-... so skip to the very last equiv.
|
||
(while (let ((next (gethash equiv undo-equiv-table)))
|
||
(if next (setq equiv next))))
|
||
(setq pending-undo-list equiv)))
|
||
(undo-more
|
||
(if (numberp arg)
|
||
(prefix-numeric-value arg)
|
||
1))
|
||
;; Record the fact that the just-generated undo records come from an
|
||
;; undo operation--that is, they are redo records.
|
||
;; In the ordinary case (not within a region), map the redo
|
||
;; record to the following undos.
|
||
;; I don't know how to do that in the undo-in-region case.
|
||
(let ((list buffer-undo-list))
|
||
;; Strip any leading undo boundaries there might be, like we do
|
||
;; above when checking.
|
||
(while (eq (car list) nil)
|
||
(setq list (cdr list)))
|
||
(puthash list
|
||
;; Prevent identity mapping. This can happen if
|
||
;; consecutive nils are erroneously in undo list.
|
||
(if (or undo-in-region (eq list pending-undo-list))
|
||
t
|
||
pending-undo-list)
|
||
undo-equiv-table))
|
||
;; Don't specify a position in the undo record for the undo command.
|
||
;; Instead, undoing this should move point to where the change is.
|
||
(let ((tail buffer-undo-list)
|
||
(prev nil))
|
||
(while (car tail)
|
||
(when (integerp (car tail))
|
||
(let ((pos (car tail)))
|
||
(if prev
|
||
(setcdr prev (cdr tail))
|
||
(setq buffer-undo-list (cdr tail)))
|
||
(setq tail (cdr tail))
|
||
(while (car tail)
|
||
(if (eq pos (car tail))
|
||
(if prev
|
||
(setcdr prev (cdr tail))
|
||
(setq buffer-undo-list (cdr tail)))
|
||
(setq prev tail))
|
||
(setq tail (cdr tail)))
|
||
(setq tail nil)))
|
||
(setq prev tail tail (cdr tail))))
|
||
;; Record what the current undo list says,
|
||
;; so the next command can tell if the buffer was modified in between.
|
||
(and modified (not (buffer-modified-p))
|
||
(with-current-buffer base-buffer
|
||
(delete-auto-save-file-if-necessary recent-save)))
|
||
;; Display a message announcing success.
|
||
(if message
|
||
(message "%s" message))))
|
||
|
||
(defun buffer-disable-undo (&optional buffer)
|
||
"Make BUFFER stop keeping undo information.
|
||
No argument or nil as argument means do this for the current buffer."
|
||
(interactive)
|
||
(with-current-buffer (if buffer (get-buffer buffer) (current-buffer))
|
||
(setq buffer-undo-list t)))
|
||
|
||
(defun undo-only (&optional arg)
|
||
"Undo some previous changes.
|
||
Repeat this command to undo more changes.
|
||
A numeric ARG serves as a repeat count.
|
||
Contrary to `undo', this will not redo a previous undo."
|
||
(interactive "*p")
|
||
(let ((undo-no-redo t)) (undo arg)))
|
||
|
||
(defvar undo-in-progress nil
|
||
"Non-nil while performing an undo.
|
||
Some change-hooks test this variable to do something different.")
|
||
|
||
(defun undo-more (n)
|
||
"Undo back N undo-boundaries beyond what was already undone recently.
|
||
Call `undo-start' to get ready to undo recent changes,
|
||
then call `undo-more' one or more times to undo them."
|
||
(or (listp pending-undo-list)
|
||
(user-error (concat "No further undo information"
|
||
(and undo-in-region " for region"))))
|
||
(let ((undo-in-progress t))
|
||
;; Note: The following, while pulling elements off
|
||
;; `pending-undo-list' will call primitive change functions which
|
||
;; will push more elements onto `buffer-undo-list'.
|
||
(setq pending-undo-list (primitive-undo n pending-undo-list))
|
||
(if (null pending-undo-list)
|
||
(setq pending-undo-list t))))
|
||
|
||
(defun primitive-undo (n list)
|
||
"Undo N records from the front of the list LIST.
|
||
Return what remains of the list."
|
||
|
||
;; This is a good feature, but would make undo-start
|
||
;; unable to do what is expected.
|
||
;;(when (null (car (list)))
|
||
;; ;; If the head of the list is a boundary, it is the boundary
|
||
;; ;; preceding this command. Get rid of it and don't count it.
|
||
;; (setq list (cdr list))))
|
||
|
||
(let ((arg n)
|
||
;; In a writable buffer, enable undoing read-only text that is
|
||
;; so because of text properties.
|
||
(inhibit-read-only t)
|
||
;; Don't let `intangible' properties interfere with undo.
|
||
(inhibit-point-motion-hooks t)
|
||
;; We use oldlist only to check for EQ. ++kfs
|
||
(oldlist buffer-undo-list)
|
||
(did-apply nil)
|
||
(next nil))
|
||
(while (> arg 0)
|
||
(while (setq next (pop list)) ;Exit inner loop at undo boundary.
|
||
;; Handle an integer by setting point to that value.
|
||
(pcase next
|
||
((pred integerp) (goto-char next))
|
||
;; Element (t . TIME) records previous modtime.
|
||
;; Preserve any flag of NONEXISTENT_MODTIME_NSECS or
|
||
;; UNKNOWN_MODTIME_NSECS.
|
||
(`(t . ,time)
|
||
;; If this records an obsolete save
|
||
;; (not matching the actual disk file)
|
||
;; then don't mark unmodified.
|
||
(when (or (equal time (visited-file-modtime))
|
||
(and (consp time)
|
||
(equal (list (car time) (cdr time))
|
||
(visited-file-modtime))))
|
||
(when (fboundp 'unlock-buffer)
|
||
(unlock-buffer))
|
||
(set-buffer-modified-p nil)))
|
||
;; Element (nil PROP VAL BEG . END) is property change.
|
||
(`(nil . ,(or `(,prop ,val ,beg . ,end) pcase--dontcare))
|
||
(when (or (> (point-min) beg) (< (point-max) end))
|
||
(error "Changes to be undone are outside visible portion of buffer"))
|
||
(put-text-property beg end prop val))
|
||
;; Element (BEG . END) means range was inserted.
|
||
(`(,(and beg (pred integerp)) . ,(and end (pred integerp)))
|
||
;; (and `(,beg . ,end) `(,(pred integerp) . ,(pred integerp)))
|
||
;; Ideally: `(,(pred integerp beg) . ,(pred integerp end))
|
||
(when (or (> (point-min) beg) (< (point-max) end))
|
||
(error "Changes to be undone are outside visible portion of buffer"))
|
||
;; Set point first thing, so that undoing this undo
|
||
;; does not send point back to where it is now.
|
||
(goto-char beg)
|
||
(delete-region beg end))
|
||
;; Element (apply FUN . ARGS) means call FUN to undo.
|
||
(`(apply . ,fun-args)
|
||
(let ((currbuff (current-buffer)))
|
||
(if (integerp (car fun-args))
|
||
;; Long format: (apply DELTA START END FUN . ARGS).
|
||
(pcase-let* ((`(,delta ,start ,end ,fun . ,args) fun-args)
|
||
(start-mark (copy-marker start nil))
|
||
(end-mark (copy-marker end t)))
|
||
(when (or (> (point-min) start) (< (point-max) end))
|
||
(error "Changes to be undone are outside visible portion of buffer"))
|
||
(apply fun args) ;; Use `save-current-buffer'?
|
||
;; Check that the function did what the entry
|
||
;; said it would do.
|
||
(unless (and (= start start-mark)
|
||
(= (+ delta end) end-mark))
|
||
(error "Changes to be undone by function different than announced"))
|
||
(set-marker start-mark nil)
|
||
(set-marker end-mark nil))
|
||
(apply fun-args))
|
||
(unless (eq currbuff (current-buffer))
|
||
(error "Undo function switched buffer"))
|
||
(setq did-apply t)))
|
||
;; Element (STRING . POS) means STRING was deleted.
|
||
(`(,(and string (pred stringp)) . ,(and pos (pred integerp)))
|
||
(when (let ((apos (abs pos)))
|
||
(or (< apos (point-min)) (> apos (point-max))))
|
||
(error "Changes to be undone are outside visible portion of buffer"))
|
||
(let (valid-marker-adjustments)
|
||
;; Check that marker adjustments which were recorded
|
||
;; with the (STRING . POS) record are still valid, ie
|
||
;; the markers haven't moved. We check their validity
|
||
;; before reinserting the string so as we don't need to
|
||
;; mind marker insertion-type.
|
||
(while (and (markerp (car-safe (car list)))
|
||
(integerp (cdr-safe (car list))))
|
||
(let* ((marker-adj (pop list))
|
||
(m (car marker-adj)))
|
||
(and (eq (marker-buffer m) (current-buffer))
|
||
(= pos m)
|
||
(push marker-adj valid-marker-adjustments))))
|
||
;; Insert string and adjust point
|
||
(if (< pos 0)
|
||
(progn
|
||
(goto-char (- pos))
|
||
(insert string))
|
||
(goto-char pos)
|
||
(insert string)
|
||
(goto-char pos))
|
||
;; Adjust the valid marker adjustments
|
||
(dolist (adj valid-marker-adjustments)
|
||
(set-marker (car adj)
|
||
(- (car adj) (cdr adj))))))
|
||
;; (MARKER . OFFSET) means a marker MARKER was adjusted by OFFSET.
|
||
(`(,(and marker (pred markerp)) . ,(and offset (pred integerp)))
|
||
(warn "Encountered %S entry in undo list with no matching (TEXT . POS) entry"
|
||
next)
|
||
;; Even though these elements are not expected in the undo
|
||
;; list, adjust them to be conservative for the 24.4
|
||
;; release. (Bug#16818)
|
||
(when (marker-buffer marker)
|
||
(set-marker marker
|
||
(- marker offset)
|
||
(marker-buffer marker))))
|
||
(_ (error "Unrecognized entry in undo list %S" next))))
|
||
(setq arg (1- arg)))
|
||
;; Make sure an apply entry produces at least one undo entry,
|
||
;; so the test in `undo' for continuing an undo series
|
||
;; will work right.
|
||
(if (and did-apply
|
||
(eq oldlist buffer-undo-list))
|
||
(setq buffer-undo-list
|
||
(cons (list 'apply 'cdr nil) buffer-undo-list))))
|
||
list)
|
||
|
||
;; Deep copy of a list
|
||
(defun undo-copy-list (list)
|
||
"Make a copy of undo list LIST."
|
||
(mapcar 'undo-copy-list-1 list))
|
||
|
||
(defun undo-copy-list-1 (elt)
|
||
(if (consp elt)
|
||
(cons (car elt) (undo-copy-list-1 (cdr elt)))
|
||
elt))
|
||
|
||
(defun undo-start (&optional beg end)
|
||
"Set `pending-undo-list' to the front of the undo list.
|
||
The next call to `undo-more' will undo the most recently made change.
|
||
If BEG and END are specified, then only undo elements
|
||
that apply to text between BEG and END are used; other undo elements
|
||
are ignored. If BEG and END are nil, all undo elements are used."
|
||
(if (eq buffer-undo-list t)
|
||
(user-error "No undo information in this buffer"))
|
||
(setq pending-undo-list
|
||
(if (and beg end (not (= beg end)))
|
||
(undo-make-selective-list (min beg end) (max beg end))
|
||
buffer-undo-list)))
|
||
|
||
;; The positions given in elements of the undo list are the positions
|
||
;; as of the time that element was recorded to undo history. In
|
||
;; general, subsequent buffer edits render those positions invalid in
|
||
;; the current buffer, unless adjusted according to the intervening
|
||
;; undo elements.
|
||
;;
|
||
;; Undo in region is a use case that requires adjustments to undo
|
||
;; elements. It must adjust positions of elements in the region based
|
||
;; on newer elements not in the region so as they may be correctly
|
||
;; applied in the current buffer. undo-make-selective-list
|
||
;; accomplishes this with its undo-deltas list of adjustments. An
|
||
;; example undo history from oldest to newest:
|
||
;;
|
||
;; buf pos:
|
||
;; 123456789 buffer-undo-list undo-deltas
|
||
;; --------- ---------------- -----------
|
||
;; aaa (1 . 4) (1 . -3)
|
||
;; aaba (3 . 4) N/A (in region)
|
||
;; ccaaba (1 . 3) (1 . -2)
|
||
;; ccaabaddd (7 . 10) (7 . -3)
|
||
;; ccaabdd ("ad" . 6) (6 . 2)
|
||
;; ccaabaddd (6 . 8) (6 . -2)
|
||
;; | |<-- region: "caab", from 2 to 6
|
||
;;
|
||
;; When the user starts a run of undos in region,
|
||
;; undo-make-selective-list is called to create the full list of in
|
||
;; region elements. Each element is adjusted forward chronologically
|
||
;; through undo-deltas to determine if it is in the region.
|
||
;;
|
||
;; In the above example, the insertion of "b" is (3 . 4) in the
|
||
;; buffer-undo-list. The undo-delta (1 . -2) causes (3 . 4) to become
|
||
;; (5 . 6). The next three undo-deltas cause no adjustment, so (5
|
||
;; . 6) is assessed as in the region and placed in the selective list.
|
||
;; Notably, the end of region itself adjusts from "2 to 6" to "2 to 5"
|
||
;; due to the selected element. The "b" insertion is the only element
|
||
;; fully in the region, so in this example undo-make-selective-list
|
||
;; returns (nil (5 . 6)).
|
||
;;
|
||
;; The adjustment of the (7 . 10) insertion of "ddd" shows an edge
|
||
;; case. It is adjusted through the undo-deltas: ((6 . 2) (6 . -2)).
|
||
;; Normally an undo-delta of (6 . 2) would cause positions after 6 to
|
||
;; adjust by 2. However, they shouldn't adjust to less than 6, so (7
|
||
;; . 10) adjusts to (6 . 8) due to the first undo delta.
|
||
;;
|
||
;; More interesting is how to adjust the "ddd" insertion due to the
|
||
;; next undo-delta: (6 . -2), corresponding to reinsertion of "ad".
|
||
;; If the reinsertion was a manual retyping of "ad", then the total
|
||
;; adjustment should be (7 . 10) -> (6 . 8) -> (8 . 10). However, if
|
||
;; the reinsertion was due to undo, one might expect the first "d"
|
||
;; character would again be a part of the "ddd" text, meaning its
|
||
;; total adjustment would be (7 . 10) -> (6 . 8) -> (7 . 10).
|
||
;;
|
||
;; undo-make-selective-list assumes in this situation that "ad" was a
|
||
;; new edit, even if it was inserted because of an undo.
|
||
;; Consequently, if the user undos in region "8 to 10" of the
|
||
;; "ccaabaddd" buffer, they could be surprised that it becomes
|
||
;; "ccaabad", as though the first "d" became detached from the
|
||
;; original "ddd" insertion. This quirk is a FIXME.
|
||
|
||
(defun undo-make-selective-list (start end)
|
||
"Return a list of undo elements for the region START to END.
|
||
The elements come from `buffer-undo-list', but we keep only the
|
||
elements inside this region, and discard those outside this
|
||
region. The elements' positions are adjusted so as the returned
|
||
list can be applied to the current buffer."
|
||
(let ((ulist buffer-undo-list)
|
||
;; A list of position adjusted undo elements in the region.
|
||
(selective-list (list nil))
|
||
;; A list of undo-deltas for out of region undo elements.
|
||
undo-deltas
|
||
undo-elt)
|
||
(while ulist
|
||
(when undo-no-redo
|
||
(while (gethash ulist undo-equiv-table)
|
||
(setq ulist (gethash ulist undo-equiv-table))))
|
||
(setq undo-elt (car ulist))
|
||
(cond
|
||
((null undo-elt)
|
||
;; Don't put two nils together in the list
|
||
(when (car selective-list)
|
||
(push nil selective-list)))
|
||
((and (consp undo-elt) (eq (car undo-elt) t))
|
||
;; This is a "was unmodified" element. Keep it
|
||
;; if we have kept everything thus far.
|
||
(when (not undo-deltas)
|
||
(push undo-elt selective-list)))
|
||
;; Skip over marker adjustments, instead relying
|
||
;; on finding them after (TEXT . POS) elements
|
||
((markerp (car-safe undo-elt))
|
||
nil)
|
||
(t
|
||
(let ((adjusted-undo-elt (undo-adjust-elt undo-elt
|
||
undo-deltas)))
|
||
(if (undo-elt-in-region adjusted-undo-elt start end)
|
||
(progn
|
||
(setq end (+ end (cdr (undo-delta adjusted-undo-elt))))
|
||
(push adjusted-undo-elt selective-list)
|
||
;; Keep (MARKER . ADJUSTMENT) if their (TEXT . POS) was
|
||
;; kept. primitive-undo may discard them later.
|
||
(when (and (stringp (car-safe adjusted-undo-elt))
|
||
(integerp (cdr-safe adjusted-undo-elt)))
|
||
(let ((list-i (cdr ulist)))
|
||
(while (markerp (car-safe (car list-i)))
|
||
(push (pop list-i) selective-list)))))
|
||
(let ((delta (undo-delta undo-elt)))
|
||
(when (/= 0 (cdr delta))
|
||
(push delta undo-deltas)))))))
|
||
(pop ulist))
|
||
(nreverse selective-list)))
|
||
|
||
(defun undo-elt-in-region (undo-elt start end)
|
||
"Determine whether UNDO-ELT falls inside the region START ... END.
|
||
If it crosses the edge, we return nil.
|
||
|
||
Generally this function is not useful for determining
|
||
whether (MARKER . ADJUSTMENT) undo elements are in the region,
|
||
because markers can be arbitrarily relocated. Instead, pass the
|
||
marker adjustment's corresponding (TEXT . POS) element."
|
||
(cond ((integerp undo-elt)
|
||
(and (>= undo-elt start)
|
||
(<= undo-elt end)))
|
||
((eq undo-elt nil)
|
||
t)
|
||
((atom undo-elt)
|
||
nil)
|
||
((stringp (car undo-elt))
|
||
;; (TEXT . POSITION)
|
||
(and (>= (abs (cdr undo-elt)) start)
|
||
(<= (abs (cdr undo-elt)) end)))
|
||
((and (consp undo-elt) (markerp (car undo-elt)))
|
||
;; (MARKER . ADJUSTMENT)
|
||
(<= start (car undo-elt) end))
|
||
((null (car undo-elt))
|
||
;; (nil PROPERTY VALUE BEG . END)
|
||
(let ((tail (nthcdr 3 undo-elt)))
|
||
(and (>= (car tail) start)
|
||
(<= (cdr tail) end))))
|
||
((integerp (car undo-elt))
|
||
;; (BEGIN . END)
|
||
(and (>= (car undo-elt) start)
|
||
(<= (cdr undo-elt) end)))))
|
||
|
||
(defun undo-elt-crosses-region (undo-elt start end)
|
||
"Test whether UNDO-ELT crosses one edge of that region START ... END.
|
||
This assumes we have already decided that UNDO-ELT
|
||
is not *inside* the region START...END."
|
||
(declare (obsolete nil "25.1"))
|
||
(cond ((atom undo-elt) nil)
|
||
((null (car undo-elt))
|
||
;; (nil PROPERTY VALUE BEG . END)
|
||
(let ((tail (nthcdr 3 undo-elt)))
|
||
(and (< (car tail) end)
|
||
(> (cdr tail) start))))
|
||
((integerp (car undo-elt))
|
||
;; (BEGIN . END)
|
||
(and (< (car undo-elt) end)
|
||
(> (cdr undo-elt) start)))))
|
||
|
||
(defun undo-adjust-elt (elt deltas)
|
||
"Return adjustment of undo element ELT by the undo DELTAS
|
||
list."
|
||
(pcase elt
|
||
;; POSITION
|
||
((pred integerp)
|
||
(undo-adjust-pos elt deltas))
|
||
;; (BEG . END)
|
||
(`(,(and beg (pred integerp)) . ,(and end (pred integerp)))
|
||
(undo-adjust-beg-end beg end deltas))
|
||
;; (TEXT . POSITION)
|
||
(`(,(and text (pred stringp)) . ,(and pos (pred integerp)))
|
||
(cons text (* (if (< pos 0) -1 1)
|
||
(undo-adjust-pos (abs pos) deltas))))
|
||
;; (nil PROPERTY VALUE BEG . END)
|
||
(`(nil . ,(or `(,prop ,val ,beg . ,end) pcase--dontcare))
|
||
`(nil ,prop ,val . ,(undo-adjust-beg-end beg end deltas)))
|
||
;; (apply DELTA START END FUN . ARGS)
|
||
;; FIXME
|
||
;; All others return same elt
|
||
(_ elt)))
|
||
|
||
;; (BEG . END) can adjust to the same positions, commonly when an
|
||
;; insertion was undone and they are out of region, for example:
|
||
;;
|
||
;; buf pos:
|
||
;; 123456789 buffer-undo-list undo-deltas
|
||
;; --------- ---------------- -----------
|
||
;; [...]
|
||
;; abbaa (2 . 4) (2 . -2)
|
||
;; aaa ("bb" . 2) (2 . 2)
|
||
;; [...]
|
||
;;
|
||
;; "bb" insertion (2 . 4) adjusts to (2 . 2) because of the subsequent
|
||
;; undo. Further adjustments to such an element should be the same as
|
||
;; for (TEXT . POSITION) elements. The options are:
|
||
;;
|
||
;; 1: POSITION adjusts using <= (use-< nil), resulting in behavior
|
||
;; analogous to marker insertion-type t.
|
||
;;
|
||
;; 2: POSITION adjusts using <, resulting in behavior analogous to
|
||
;; marker insertion-type nil.
|
||
;;
|
||
;; There was no strong reason to prefer one or the other, except that
|
||
;; the first is more consistent with prior undo in region behavior.
|
||
(defun undo-adjust-beg-end (beg end deltas)
|
||
"Return cons of adjustments to BEG and END by the undo DELTAS
|
||
list."
|
||
(let ((adj-beg (undo-adjust-pos beg deltas)))
|
||
;; Note: option 2 above would be like (cons (min ...) adj-end)
|
||
(cons adj-beg
|
||
(max adj-beg (undo-adjust-pos end deltas t)))))
|
||
|
||
(defun undo-adjust-pos (pos deltas &optional use-<)
|
||
"Return adjustment of POS by the undo DELTAS list, comparing
|
||
with < or <= based on USE-<."
|
||
(dolist (d deltas pos)
|
||
(when (if use-<
|
||
(< (car d) pos)
|
||
(<= (car d) pos))
|
||
(setq pos
|
||
;; Don't allow pos to become less than the undo-delta
|
||
;; position. This edge case is described in the overview
|
||
;; comments.
|
||
(max (car d) (- pos (cdr d)))))))
|
||
|
||
;; Return the first affected buffer position and the delta for an undo element
|
||
;; delta is defined as the change in subsequent buffer positions if we *did*
|
||
;; the undo.
|
||
(defun undo-delta (undo-elt)
|
||
(if (consp undo-elt)
|
||
(cond ((stringp (car undo-elt))
|
||
;; (TEXT . POSITION)
|
||
(cons (abs (cdr undo-elt)) (length (car undo-elt))))
|
||
((integerp (car undo-elt))
|
||
;; (BEGIN . END)
|
||
(cons (car undo-elt) (- (car undo-elt) (cdr undo-elt))))
|
||
(t
|
||
'(0 . 0)))
|
||
'(0 . 0)))
|
||
|
||
(defcustom undo-ask-before-discard nil
|
||
"If non-nil ask about discarding undo info for the current command.
|
||
Normally, Emacs discards the undo info for the current command if
|
||
it exceeds `undo-outer-limit'. But if you set this option
|
||
non-nil, it asks in the echo area whether to discard the info.
|
||
If you answer no, there is a slight risk that Emacs might crash, so
|
||
only do it if you really want to undo the command.
|
||
|
||
This option is mainly intended for debugging. You have to be
|
||
careful if you use it for other purposes. Garbage collection is
|
||
inhibited while the question is asked, meaning that Emacs might
|
||
leak memory. So you should make sure that you do not wait
|
||
excessively long before answering the question."
|
||
:type 'boolean
|
||
:group 'undo
|
||
:version "22.1")
|
||
|
||
(defvar undo-extra-outer-limit nil
|
||
"If non-nil, an extra level of size that's ok in an undo item.
|
||
We don't ask the user about truncating the undo list until the
|
||
current item gets bigger than this amount.
|
||
|
||
This variable only matters if `undo-ask-before-discard' is non-nil.")
|
||
(make-variable-buffer-local 'undo-extra-outer-limit)
|
||
|
||
;; When the first undo batch in an undo list is longer than
|
||
;; undo-outer-limit, this function gets called to warn the user that
|
||
;; the undo info for the current command was discarded. Garbage
|
||
;; collection is inhibited around the call, so it had better not do a
|
||
;; lot of consing.
|
||
(setq undo-outer-limit-function 'undo-outer-limit-truncate)
|
||
(defun undo-outer-limit-truncate (size)
|
||
(if undo-ask-before-discard
|
||
(when (or (null undo-extra-outer-limit)
|
||
(> size undo-extra-outer-limit))
|
||
;; Don't ask the question again unless it gets even bigger.
|
||
;; This applies, in particular, if the user quits from the question.
|
||
;; Such a quit quits out of GC, but something else will call GC
|
||
;; again momentarily. It will call this function again,
|
||
;; but we don't want to ask the question again.
|
||
(setq undo-extra-outer-limit (+ size 50000))
|
||
(if (let (use-dialog-box track-mouse executing-kbd-macro )
|
||
(yes-or-no-p (format-message
|
||
"Buffer `%s' undo info is %d bytes long; discard it? "
|
||
(buffer-name) size)))
|
||
(progn (setq buffer-undo-list nil)
|
||
(setq undo-extra-outer-limit nil)
|
||
t)
|
||
nil))
|
||
(display-warning '(undo discard-info)
|
||
(concat
|
||
(format-message
|
||
"Buffer `%s' undo info was %d bytes long.\n"
|
||
(buffer-name) size)
|
||
"The undo info was discarded because it exceeded \
|
||
`undo-outer-limit'.
|
||
|
||
This is normal if you executed a command that made a huge change
|
||
to the buffer. In that case, to prevent similar problems in the
|
||
future, set `undo-outer-limit' to a value that is large enough to
|
||
cover the maximum size of normal changes you expect a single
|
||
command to make, but not so large that it might exceed the
|
||
maximum memory allotted to Emacs.
|
||
|
||
If you did not execute any such command, the situation is
|
||
probably due to a bug and you should report it.
|
||
|
||
You can disable the popping up of this buffer by adding the entry
|
||
\(undo discard-info) to the user option `warning-suppress-types',
|
||
which is defined in the `warnings' library.\n")
|
||
:warning)
|
||
(setq buffer-undo-list nil)
|
||
t))
|
||
|
||
(defcustom password-word-equivalents
|
||
'("password" "passcode" "passphrase" "pass phrase"
|
||
; These are sorted according to the GNU en_US locale.
|
||
"암호" ; ko
|
||
"パスワード" ; ja
|
||
"ପ୍ରବେଶ ସଙ୍କେତ" ; or
|
||
"ពាក្យសម្ងាត់" ; km
|
||
"adgangskode" ; da
|
||
"contraseña" ; es
|
||
"contrasenya" ; ca
|
||
"geslo" ; sl
|
||
"hasło" ; pl
|
||
"heslo" ; cs, sk
|
||
"iphasiwedi" ; zu
|
||
"jelszó" ; hu
|
||
"lösenord" ; sv
|
||
"lozinka" ; hr, sr
|
||
"mật khẩu" ; vi
|
||
"mot de passe" ; fr
|
||
"parola" ; tr
|
||
"pasahitza" ; eu
|
||
"passord" ; nb
|
||
"passwort" ; de
|
||
"pasvorto" ; eo
|
||
"salasana" ; fi
|
||
"senha" ; pt
|
||
"slaptažodis" ; lt
|
||
"wachtwoord" ; nl
|
||
"كلمة السر" ; ar
|
||
"ססמה" ; he
|
||
"лозинка" ; sr
|
||
"пароль" ; kk, ru, uk
|
||
"गुप्तशब्द" ; mr
|
||
"शब्दकूट" ; hi
|
||
"પાસવર્ડ" ; gu
|
||
"సంకేతపదము" ; te
|
||
"ਪਾਸਵਰਡ" ; pa
|
||
"ಗುಪ್ತಪದ" ; kn
|
||
"கடவுச்சொல்" ; ta
|
||
"അടയാളവാക്ക്" ; ml
|
||
"গুপ্তশব্দ" ; as
|
||
"পাসওয়ার্ড" ; bn_IN
|
||
"රහස්පදය" ; si
|
||
"密码" ; zh_CN
|
||
"密碼" ; zh_TW
|
||
)
|
||
"List of words equivalent to \"password\".
|
||
This is used by Shell mode and other parts of Emacs to recognize
|
||
password prompts, including prompts in languages other than
|
||
English. Different case choices should not be assumed to be
|
||
included; callers should bind `case-fold-search' to t."
|
||
:type '(repeat string)
|
||
:version "24.4"
|
||
:group 'processes)
|
||
|
||
(defvar shell-command-history nil
|
||
"History list for some commands that read shell commands.
|
||
|
||
Maximum length of the history list is determined by the value
|
||
of `history-length', which see.")
|
||
|
||
(defvar shell-command-switch (purecopy "-c")
|
||
"Switch used to have the shell execute its command line argument.")
|
||
|
||
(defvar shell-command-default-error-buffer nil
|
||
"Buffer name for `shell-command' and `shell-command-on-region' error output.
|
||
This buffer is used when `shell-command' or `shell-command-on-region'
|
||
is run interactively. A value of nil means that output to stderr and
|
||
stdout will be intermixed in the output stream.")
|
||
|
||
(declare-function mailcap-file-default-commands "mailcap" (files))
|
||
(declare-function dired-get-filename "dired" (&optional localp no-error-if-not-filep))
|
||
|
||
(defun minibuffer-default-add-shell-commands ()
|
||
"Return a list of all commands associated with the current file.
|
||
This function is used to add all related commands retrieved by `mailcap'
|
||
to the end of the list of defaults just after the default value."
|
||
(interactive)
|
||
(let* ((filename (if (listp minibuffer-default)
|
||
(car minibuffer-default)
|
||
minibuffer-default))
|
||
(commands (and filename (require 'mailcap nil t)
|
||
(mailcap-file-default-commands (list filename)))))
|
||
(setq commands (mapcar (lambda (command)
|
||
(concat command " " filename))
|
||
commands))
|
||
(if (listp minibuffer-default)
|
||
(append minibuffer-default commands)
|
||
(cons minibuffer-default commands))))
|
||
|
||
(declare-function shell-completion-vars "shell" ())
|
||
|
||
(defvar minibuffer-local-shell-command-map
|
||
(let ((map (make-sparse-keymap)))
|
||
(set-keymap-parent map minibuffer-local-map)
|
||
(define-key map "\t" 'completion-at-point)
|
||
map)
|
||
"Keymap used for completing shell commands in minibuffer.")
|
||
|
||
(defun read-shell-command (prompt &optional initial-contents hist &rest args)
|
||
"Read a shell command from the minibuffer.
|
||
The arguments are the same as the ones of `read-from-minibuffer',
|
||
except READ and KEYMAP are missing and HIST defaults
|
||
to `shell-command-history'."
|
||
(require 'shell)
|
||
(minibuffer-with-setup-hook
|
||
(lambda ()
|
||
(shell-completion-vars)
|
||
(set (make-local-variable 'minibuffer-default-add-function)
|
||
'minibuffer-default-add-shell-commands))
|
||
(apply 'read-from-minibuffer prompt initial-contents
|
||
minibuffer-local-shell-command-map
|
||
nil
|
||
(or hist 'shell-command-history)
|
||
args)))
|
||
|
||
(defcustom async-shell-command-buffer 'confirm-new-buffer
|
||
"What to do when the output buffer is used by another shell command.
|
||
This option specifies how to resolve the conflict where a new command
|
||
wants to direct its output to the buffer `*Async Shell Command*',
|
||
but this buffer is already taken by another running shell command.
|
||
|
||
The value `confirm-kill-process' is used to ask for confirmation before
|
||
killing the already running process and running a new process
|
||
in the same buffer, `confirm-new-buffer' for confirmation before running
|
||
the command in a new buffer with a name other than the default buffer name,
|
||
`new-buffer' for doing the same without confirmation,
|
||
`confirm-rename-buffer' for confirmation before renaming the existing
|
||
output buffer and running a new command in the default buffer,
|
||
`rename-buffer' for doing the same without confirmation."
|
||
:type '(choice (const :tag "Confirm killing of running command"
|
||
confirm-kill-process)
|
||
(const :tag "Confirm creation of a new buffer"
|
||
confirm-new-buffer)
|
||
(const :tag "Create a new buffer"
|
||
new-buffer)
|
||
(const :tag "Confirm renaming of existing buffer"
|
||
confirm-rename-buffer)
|
||
(const :tag "Rename the existing buffer"
|
||
rename-buffer))
|
||
:group 'shell
|
||
:version "24.3")
|
||
|
||
(defun async-shell-command (command &optional output-buffer error-buffer)
|
||
"Execute string COMMAND asynchronously in background.
|
||
|
||
Like `shell-command', but adds `&' at the end of COMMAND
|
||
to execute it asynchronously.
|
||
|
||
The output appears in the buffer `*Async Shell Command*'.
|
||
That buffer is in shell mode.
|
||
|
||
You can configure `async-shell-command-buffer' to specify what to do in
|
||
case when `*Async Shell Command*' buffer is already taken by another
|
||
running shell command. To run COMMAND without displaying the output
|
||
in a window you can configure `display-buffer-alist' to use the action
|
||
`display-buffer-no-window' for the buffer `*Async Shell Command*'.
|
||
|
||
In Elisp, you will often be better served by calling `start-process'
|
||
directly, since it offers more control and does not impose the use of a
|
||
shell (with its need to quote arguments)."
|
||
(interactive
|
||
(list
|
||
(read-shell-command "Async shell command: " nil nil
|
||
(let ((filename
|
||
(cond
|
||
(buffer-file-name)
|
||
((eq major-mode 'dired-mode)
|
||
(dired-get-filename nil t)))))
|
||
(and filename (file-relative-name filename))))
|
||
current-prefix-arg
|
||
shell-command-default-error-buffer))
|
||
(unless (string-match "&[ \t]*\\'" command)
|
||
(setq command (concat command " &")))
|
||
(shell-command command output-buffer error-buffer))
|
||
|
||
(defun shell-command (command &optional output-buffer error-buffer)
|
||
"Execute string COMMAND in inferior shell; display output, if any.
|
||
With prefix argument, insert the COMMAND's output at point.
|
||
|
||
If COMMAND ends in `&', execute it asynchronously.
|
||
The output appears in the buffer `*Async Shell Command*'.
|
||
That buffer is in shell mode. You can also use
|
||
`async-shell-command' that automatically adds `&'.
|
||
|
||
Otherwise, COMMAND is executed synchronously. The output appears in
|
||
the buffer `*Shell Command Output*'. If the output is short enough to
|
||
display in the echo area (which is determined by the variables
|
||
`resize-mini-windows' and `max-mini-window-height'), it is shown
|
||
there, but it is nonetheless available in buffer `*Shell Command
|
||
Output*' even though that buffer is not automatically displayed.
|
||
|
||
To specify a coding system for converting non-ASCII characters
|
||
in the shell command output, use \\[universal-coding-system-argument] \
|
||
before this command.
|
||
|
||
Noninteractive callers can specify coding systems by binding
|
||
`coding-system-for-read' and `coding-system-for-write'.
|
||
|
||
The optional second argument OUTPUT-BUFFER, if non-nil,
|
||
says to put the output in some other buffer.
|
||
If OUTPUT-BUFFER is a buffer or buffer name, put the output there.
|
||
If OUTPUT-BUFFER is not a buffer and not nil,
|
||
insert output in current buffer. (This cannot be done asynchronously.)
|
||
In either case, the buffer is first erased, and the output is
|
||
inserted after point (leaving mark after it).
|
||
|
||
If the command terminates without error, but generates output,
|
||
and you did not specify \"insert it in the current buffer\",
|
||
the output can be displayed in the echo area or in its buffer.
|
||
If the output is short enough to display in the echo area
|
||
\(determined by the variable `max-mini-window-height' if
|
||
`resize-mini-windows' is non-nil), it is shown there.
|
||
Otherwise,the buffer containing the output is displayed.
|
||
|
||
If there is output and an error, and you did not specify \"insert it
|
||
in the current buffer\", a message about the error goes at the end
|
||
of the output.
|
||
|
||
If there is no output, or if output is inserted in the current buffer,
|
||
then `*Shell Command Output*' is deleted.
|
||
|
||
If the optional third argument ERROR-BUFFER is non-nil, it is a buffer
|
||
or buffer name to which to direct the command's standard error output.
|
||
If it is nil, error output is mingled with regular output.
|
||
In an interactive call, the variable `shell-command-default-error-buffer'
|
||
specifies the value of ERROR-BUFFER.
|
||
|
||
In Elisp, you will often be better served by calling `call-process' or
|
||
`start-process' directly, since it offers more control and does not impose
|
||
the use of a shell (with its need to quote arguments)."
|
||
|
||
(interactive
|
||
(list
|
||
(read-shell-command "Shell command: " nil nil
|
||
(let ((filename
|
||
(cond
|
||
(buffer-file-name)
|
||
((eq major-mode 'dired-mode)
|
||
(dired-get-filename nil t)))))
|
||
(and filename (file-relative-name filename))))
|
||
current-prefix-arg
|
||
shell-command-default-error-buffer))
|
||
;; Look for a handler in case default-directory is a remote file name.
|
||
(let ((handler
|
||
(find-file-name-handler (directory-file-name default-directory)
|
||
'shell-command)))
|
||
(if handler
|
||
(funcall handler 'shell-command command output-buffer error-buffer)
|
||
(if (and output-buffer
|
||
(not (or (bufferp output-buffer) (stringp output-buffer))))
|
||
;; Output goes in current buffer.
|
||
(let ((error-file
|
||
(if error-buffer
|
||
(make-temp-file
|
||
(expand-file-name "scor"
|
||
(or small-temporary-file-directory
|
||
temporary-file-directory)))
|
||
nil)))
|
||
(barf-if-buffer-read-only)
|
||
(push-mark nil t)
|
||
;; We do not use -f for csh; we will not support broken use of
|
||
;; .cshrcs. Even the BSD csh manual says to use
|
||
;; "if ($?prompt) exit" before things which are not useful
|
||
;; non-interactively. Besides, if someone wants their other
|
||
;; aliases for shell commands then they can still have them.
|
||
(call-process shell-file-name nil
|
||
(if error-file
|
||
(list t error-file)
|
||
t)
|
||
nil shell-command-switch command)
|
||
(when (and error-file (file-exists-p error-file))
|
||
(if (< 0 (nth 7 (file-attributes error-file)))
|
||
(with-current-buffer (get-buffer-create error-buffer)
|
||
(let ((pos-from-end (- (point-max) (point))))
|
||
(or (bobp)
|
||
(insert "\f\n"))
|
||
;; Do no formatting while reading error file,
|
||
;; because that can run a shell command, and we
|
||
;; don't want that to cause an infinite recursion.
|
||
(format-insert-file error-file nil)
|
||
;; Put point after the inserted errors.
|
||
(goto-char (- (point-max) pos-from-end)))
|
||
(display-buffer (current-buffer))))
|
||
(delete-file error-file))
|
||
;; This is like exchange-point-and-mark, but doesn't
|
||
;; activate the mark. It is cleaner to avoid activation,
|
||
;; even though the command loop would deactivate the mark
|
||
;; because we inserted text.
|
||
(goto-char (prog1 (mark t)
|
||
(set-marker (mark-marker) (point)
|
||
(current-buffer)))))
|
||
;; Output goes in a separate buffer.
|
||
;; Preserve the match data in case called from a program.
|
||
(save-match-data
|
||
(if (string-match "[ \t]*&[ \t]*\\'" command)
|
||
;; Command ending with ampersand means asynchronous.
|
||
(let ((buffer (get-buffer-create
|
||
(or output-buffer "*Async Shell Command*")))
|
||
(directory default-directory)
|
||
proc)
|
||
;; Remove the ampersand.
|
||
(setq command (substring command 0 (match-beginning 0)))
|
||
;; Ask the user what to do with already running process.
|
||
(setq proc (get-buffer-process buffer))
|
||
(when proc
|
||
(cond
|
||
((eq async-shell-command-buffer 'confirm-kill-process)
|
||
;; If will kill a process, query first.
|
||
(if (yes-or-no-p "A command is running in the default buffer. Kill it? ")
|
||
(kill-process proc)
|
||
(error "Shell command in progress")))
|
||
((eq async-shell-command-buffer 'confirm-new-buffer)
|
||
;; If will create a new buffer, query first.
|
||
(if (yes-or-no-p "A command is running in the default buffer. Use a new buffer? ")
|
||
(setq buffer (generate-new-buffer
|
||
(or (and (bufferp output-buffer) (buffer-name output-buffer))
|
||
output-buffer "*Async Shell Command*")))
|
||
(error "Shell command in progress")))
|
||
((eq async-shell-command-buffer 'new-buffer)
|
||
;; It will create a new buffer.
|
||
(setq buffer (generate-new-buffer
|
||
(or (and (bufferp output-buffer) (buffer-name output-buffer))
|
||
output-buffer "*Async Shell Command*"))))
|
||
((eq async-shell-command-buffer 'confirm-rename-buffer)
|
||
;; If will rename the buffer, query first.
|
||
(if (yes-or-no-p "A command is running in the default buffer. Rename it? ")
|
||
(progn
|
||
(with-current-buffer buffer
|
||
(rename-uniquely))
|
||
(setq buffer (get-buffer-create
|
||
(or output-buffer "*Async Shell Command*"))))
|
||
(error "Shell command in progress")))
|
||
((eq async-shell-command-buffer 'rename-buffer)
|
||
;; It will rename the buffer.
|
||
(with-current-buffer buffer
|
||
(rename-uniquely))
|
||
(setq buffer (get-buffer-create
|
||
(or output-buffer "*Async Shell Command*"))))))
|
||
(with-current-buffer buffer
|
||
(setq buffer-read-only nil)
|
||
;; Setting buffer-read-only to nil doesn't suffice
|
||
;; if some text has a non-nil read-only property,
|
||
;; which comint sometimes adds for prompts.
|
||
(let ((inhibit-read-only t))
|
||
(erase-buffer))
|
||
(display-buffer buffer '(nil (allow-no-window . t)))
|
||
(setq default-directory directory)
|
||
(setq proc (start-process "Shell" buffer shell-file-name
|
||
shell-command-switch command))
|
||
(setq mode-line-process '(":%s"))
|
||
(require 'shell) (shell-mode)
|
||
(set-process-sentinel proc 'shell-command-sentinel)
|
||
;; Use the comint filter for proper handling of carriage motion
|
||
;; (see `comint-inhibit-carriage-motion'),.
|
||
(set-process-filter proc 'comint-output-filter)
|
||
))
|
||
;; Otherwise, command is executed synchronously.
|
||
(shell-command-on-region (point) (point) command
|
||
output-buffer nil error-buffer)))))))
|
||
|
||
(defun display-message-or-buffer (message
|
||
&optional buffer-name not-this-window frame)
|
||
"Display MESSAGE in the echo area if possible, otherwise in a pop-up buffer.
|
||
MESSAGE may be either a string or a buffer.
|
||
|
||
A buffer is displayed using `display-buffer' if MESSAGE is too long for
|
||
the maximum height of the echo area, as defined by `max-mini-window-height'
|
||
if `resize-mini-windows' is non-nil.
|
||
|
||
Returns either the string shown in the echo area, or when a pop-up
|
||
buffer is used, the window used to display it.
|
||
|
||
If MESSAGE is a string, then the optional argument BUFFER-NAME is the
|
||
name of the buffer used to display it in the case where a pop-up buffer
|
||
is used, defaulting to `*Message*'. In the case where MESSAGE is a
|
||
string and it is displayed in the echo area, it is not specified whether
|
||
the contents are inserted into the buffer anyway.
|
||
|
||
Optional arguments NOT-THIS-WINDOW and FRAME are as for `display-buffer',
|
||
and only used if a buffer is displayed."
|
||
(cond ((and (stringp message) (not (string-match "\n" message)))
|
||
;; Trivial case where we can use the echo area
|
||
(message "%s" message))
|
||
((and (stringp message)
|
||
(= (string-match "\n" message) (1- (length message))))
|
||
;; Trivial case where we can just remove single trailing newline
|
||
(message "%s" (substring message 0 (1- (length message)))))
|
||
(t
|
||
;; General case
|
||
(with-current-buffer
|
||
(if (bufferp message)
|
||
message
|
||
(get-buffer-create (or buffer-name "*Message*")))
|
||
|
||
(unless (bufferp message)
|
||
(erase-buffer)
|
||
(insert message))
|
||
|
||
(let ((lines
|
||
(if (= (buffer-size) 0)
|
||
0
|
||
(count-screen-lines nil nil nil (minibuffer-window)))))
|
||
(cond ((= lines 0))
|
||
((and (or (<= lines 1)
|
||
(<= lines
|
||
(if resize-mini-windows
|
||
(cond ((floatp max-mini-window-height)
|
||
(* (frame-height)
|
||
max-mini-window-height))
|
||
((integerp max-mini-window-height)
|
||
max-mini-window-height)
|
||
(t
|
||
1))
|
||
1)))
|
||
;; Don't use the echo area if the output buffer is
|
||
;; already displayed in the selected frame.
|
||
(not (get-buffer-window (current-buffer))))
|
||
;; Echo area
|
||
(goto-char (point-max))
|
||
(when (bolp)
|
||
(backward-char 1))
|
||
(message "%s" (buffer-substring (point-min) (point))))
|
||
(t
|
||
;; Buffer
|
||
(goto-char (point-min))
|
||
(display-buffer (current-buffer)
|
||
not-this-window frame))))))))
|
||
|
||
|
||
;; We have a sentinel to prevent insertion of a termination message
|
||
;; in the buffer itself.
|
||
(defun shell-command-sentinel (process signal)
|
||
(if (memq (process-status process) '(exit signal))
|
||
(message "%s: %s."
|
||
(car (cdr (cdr (process-command process))))
|
||
(substring signal 0 -1))))
|
||
|
||
(defun shell-command-on-region (start end command
|
||
&optional output-buffer replace
|
||
error-buffer display-error-buffer)
|
||
"Execute string COMMAND in inferior shell with region as input.
|
||
Normally display output (if any) in temp buffer `*Shell Command Output*';
|
||
Prefix arg means replace the region with it. Return the exit code of
|
||
COMMAND.
|
||
|
||
To specify a coding system for converting non-ASCII characters
|
||
in the input and output to the shell command, use \\[universal-coding-system-argument]
|
||
before this command. By default, the input (from the current buffer)
|
||
is encoded using coding-system specified by `process-coding-system-alist',
|
||
falling back to `default-process-coding-system' if no match for COMMAND
|
||
is found in `process-coding-system-alist'.
|
||
|
||
Noninteractive callers can specify coding systems by binding
|
||
`coding-system-for-read' and `coding-system-for-write'.
|
||
|
||
If the command generates output, the output may be displayed
|
||
in the echo area or in a buffer.
|
||
If the output is short enough to display in the echo area
|
||
\(determined by the variable `max-mini-window-height' if
|
||
`resize-mini-windows' is non-nil), it is shown there.
|
||
Otherwise it is displayed in the buffer `*Shell Command Output*'.
|
||
The output is available in that buffer in both cases.
|
||
|
||
If there is output and an error, a message about the error
|
||
appears at the end of the output. If there is no output, or if
|
||
output is inserted in the current buffer, the buffer `*Shell
|
||
Command Output*' is deleted.
|
||
|
||
Optional fourth arg OUTPUT-BUFFER specifies where to put the
|
||
command's output. If the value is a buffer or buffer name,
|
||
put the output there. If the value is nil, use the buffer
|
||
`*Shell Command Output*'. Any other value, excluding nil,
|
||
means to insert the output in the current buffer. In either case,
|
||
the output is inserted after point (leaving mark after it).
|
||
|
||
Optional fifth arg REPLACE, if non-nil, means to insert the
|
||
output in place of text from START to END, putting point and mark
|
||
around it.
|
||
|
||
Optional sixth arg ERROR-BUFFER, if non-nil, specifies a buffer
|
||
or buffer name to which to direct the command's standard error
|
||
output. If nil, error output is mingled with regular output.
|
||
When called interactively, `shell-command-default-error-buffer'
|
||
is used for ERROR-BUFFER.
|
||
|
||
Optional seventh arg DISPLAY-ERROR-BUFFER, if non-nil, means to
|
||
display the error buffer if there were any errors. When called
|
||
interactively, this is t."
|
||
(interactive (let (string)
|
||
(unless (mark)
|
||
(user-error "The mark is not set now, so there is no region"))
|
||
;; Do this before calling region-beginning
|
||
;; and region-end, in case subprocess output
|
||
;; relocates them while we are in the minibuffer.
|
||
(setq string (read-shell-command "Shell command on region: "))
|
||
;; call-interactively recognizes region-beginning and
|
||
;; region-end specially, leaving them in the history.
|
||
(list (region-beginning) (region-end)
|
||
string
|
||
current-prefix-arg
|
||
current-prefix-arg
|
||
shell-command-default-error-buffer
|
||
t)))
|
||
(let ((error-file
|
||
(if error-buffer
|
||
(make-temp-file
|
||
(expand-file-name "scor"
|
||
(or small-temporary-file-directory
|
||
temporary-file-directory)))
|
||
nil))
|
||
exit-status)
|
||
(if (or replace
|
||
(and output-buffer
|
||
(not (or (bufferp output-buffer) (stringp output-buffer)))))
|
||
;; Replace specified region with output from command.
|
||
(let ((swap (and replace (< start end))))
|
||
;; Don't muck with mark unless REPLACE says we should.
|
||
(goto-char start)
|
||
(and replace (push-mark (point) 'nomsg))
|
||
(setq exit-status
|
||
(call-process-region start end shell-file-name replace
|
||
(if error-file
|
||
(list t error-file)
|
||
t)
|
||
nil shell-command-switch command))
|
||
;; It is rude to delete a buffer which the command is not using.
|
||
;; (let ((shell-buffer (get-buffer "*Shell Command Output*")))
|
||
;; (and shell-buffer (not (eq shell-buffer (current-buffer)))
|
||
;; (kill-buffer shell-buffer)))
|
||
;; Don't muck with mark unless REPLACE says we should.
|
||
(and replace swap (exchange-point-and-mark)))
|
||
;; No prefix argument: put the output in a temp buffer,
|
||
;; replacing its entire contents.
|
||
(let ((buffer (get-buffer-create
|
||
(or output-buffer "*Shell Command Output*"))))
|
||
(unwind-protect
|
||
(if (eq buffer (current-buffer))
|
||
;; If the input is the same buffer as the output,
|
||
;; delete everything but the specified region,
|
||
;; then replace that region with the output.
|
||
(progn (setq buffer-read-only nil)
|
||
(delete-region (max start end) (point-max))
|
||
(delete-region (point-min) (min start end))
|
||
(setq exit-status
|
||
(call-process-region (point-min) (point-max)
|
||
shell-file-name t
|
||
(if error-file
|
||
(list t error-file)
|
||
t)
|
||
nil shell-command-switch
|
||
command)))
|
||
;; Clear the output buffer, then run the command with
|
||
;; output there.
|
||
(let ((directory default-directory))
|
||
(with-current-buffer buffer
|
||
(setq buffer-read-only nil)
|
||
(if (not output-buffer)
|
||
(setq default-directory directory))
|
||
(erase-buffer)))
|
||
(setq exit-status
|
||
(call-process-region start end shell-file-name nil
|
||
(if error-file
|
||
(list buffer error-file)
|
||
buffer)
|
||
nil shell-command-switch command)))
|
||
;; Report the output.
|
||
(with-current-buffer buffer
|
||
(setq mode-line-process
|
||
(cond ((null exit-status)
|
||
" - Error")
|
||
((stringp exit-status)
|
||
(format " - Signal [%s]" exit-status))
|
||
((not (equal 0 exit-status))
|
||
(format " - Exit [%d]" exit-status)))))
|
||
(if (with-current-buffer buffer (> (point-max) (point-min)))
|
||
;; There's some output, display it
|
||
(display-message-or-buffer buffer)
|
||
;; No output; error?
|
||
(let ((output
|
||
(if (and error-file
|
||
(< 0 (nth 7 (file-attributes error-file))))
|
||
(format "some error output%s"
|
||
(if shell-command-default-error-buffer
|
||
(format " to the \"%s\" buffer"
|
||
shell-command-default-error-buffer)
|
||
""))
|
||
"no output")))
|
||
(cond ((null exit-status)
|
||
(message "(Shell command failed with error)"))
|
||
((equal 0 exit-status)
|
||
(message "(Shell command succeeded with %s)"
|
||
output))
|
||
((stringp exit-status)
|
||
(message "(Shell command killed by signal %s)"
|
||
exit-status))
|
||
(t
|
||
(message "(Shell command failed with code %d and %s)"
|
||
exit-status output))))
|
||
;; Don't kill: there might be useful info in the undo-log.
|
||
;; (kill-buffer buffer)
|
||
))))
|
||
|
||
(when (and error-file (file-exists-p error-file))
|
||
(if (< 0 (nth 7 (file-attributes error-file)))
|
||
(with-current-buffer (get-buffer-create error-buffer)
|
||
(let ((pos-from-end (- (point-max) (point))))
|
||
(or (bobp)
|
||
(insert "\f\n"))
|
||
;; Do no formatting while reading error file,
|
||
;; because that can run a shell command, and we
|
||
;; don't want that to cause an infinite recursion.
|
||
(format-insert-file error-file nil)
|
||
;; Put point after the inserted errors.
|
||
(goto-char (- (point-max) pos-from-end)))
|
||
(and display-error-buffer
|
||
(display-buffer (current-buffer)))))
|
||
(delete-file error-file))
|
||
exit-status))
|
||
|
||
(defun shell-command-to-string (command)
|
||
"Execute shell command COMMAND and return its output as a string."
|
||
(with-output-to-string
|
||
(with-current-buffer
|
||
standard-output
|
||
(process-file shell-file-name nil t nil shell-command-switch command))))
|
||
|
||
(defun process-file (program &optional infile buffer display &rest args)
|
||
"Process files synchronously in a separate process.
|
||
Similar to `call-process', but may invoke a file handler based on
|
||
`default-directory'. The current working directory of the
|
||
subprocess is `default-directory'.
|
||
|
||
File names in INFILE and BUFFER are handled normally, but file
|
||
names in ARGS should be relative to `default-directory', as they
|
||
are passed to the process verbatim. (This is a difference to
|
||
`call-process' which does not support file handlers for INFILE
|
||
and BUFFER.)
|
||
|
||
Some file handlers might not support all variants, for example
|
||
they might behave as if DISPLAY was nil, regardless of the actual
|
||
value passed."
|
||
(let ((fh (find-file-name-handler default-directory 'process-file))
|
||
lc stderr-file)
|
||
(unwind-protect
|
||
(if fh (apply fh 'process-file program infile buffer display args)
|
||
(when infile (setq lc (file-local-copy infile)))
|
||
(setq stderr-file (when (and (consp buffer) (stringp (cadr buffer)))
|
||
(make-temp-file "emacs")))
|
||
(prog1
|
||
(apply 'call-process program
|
||
(or lc infile)
|
||
(if stderr-file (list (car buffer) stderr-file) buffer)
|
||
display args)
|
||
(when stderr-file (copy-file stderr-file (cadr buffer) t))))
|
||
(when stderr-file (delete-file stderr-file))
|
||
(when lc (delete-file lc)))))
|
||
|
||
(defvar process-file-side-effects t
|
||
"Whether a call of `process-file' changes remote files.
|
||
|
||
By default, this variable is always set to t, meaning that a
|
||
call of `process-file' could potentially change any file on a
|
||
remote host. When set to nil, a file handler could optimize
|
||
its behavior with respect to remote file attribute caching.
|
||
|
||
You should only ever change this variable with a let-binding;
|
||
never with `setq'.")
|
||
|
||
(defun start-file-process (name buffer program &rest program-args)
|
||
"Start a program in a subprocess. Return the process object for it.
|
||
|
||
Similar to `start-process', but may invoke a file handler based on
|
||
`default-directory'. See Info node `(elisp)Magic File Names'.
|
||
|
||
This handler ought to run PROGRAM, perhaps on the local host,
|
||
perhaps on a remote host that corresponds to `default-directory'.
|
||
In the latter case, the local part of `default-directory' becomes
|
||
the working directory of the process.
|
||
|
||
PROGRAM and PROGRAM-ARGS might be file names. They are not
|
||
objects of file handler invocation. File handlers might not
|
||
support pty association, if PROGRAM is nil."
|
||
(let ((fh (find-file-name-handler default-directory 'start-file-process)))
|
||
(if fh (apply fh 'start-file-process name buffer program program-args)
|
||
(apply 'start-process name buffer program program-args))))
|
||
|
||
;;;; Process menu
|
||
|
||
(defvar tabulated-list-format)
|
||
(defvar tabulated-list-entries)
|
||
(defvar tabulated-list-sort-key)
|
||
(declare-function tabulated-list-init-header "tabulated-list" ())
|
||
(declare-function tabulated-list-print "tabulated-list"
|
||
(&optional remember-pos update))
|
||
|
||
(defvar process-menu-query-only nil)
|
||
|
||
(defvar process-menu-mode-map
|
||
(let ((map (make-sparse-keymap)))
|
||
(define-key map [?d] 'process-menu-delete-process)
|
||
map))
|
||
|
||
(define-derived-mode process-menu-mode tabulated-list-mode "Process Menu"
|
||
"Major mode for listing the processes called by Emacs."
|
||
(setq tabulated-list-format [("Process" 15 t)
|
||
("Status" 7 t)
|
||
("Buffer" 15 t)
|
||
("TTY" 12 t)
|
||
("Command" 0 t)])
|
||
(make-local-variable 'process-menu-query-only)
|
||
(setq tabulated-list-sort-key (cons "Process" nil))
|
||
(add-hook 'tabulated-list-revert-hook 'list-processes--refresh nil t)
|
||
(tabulated-list-init-header))
|
||
|
||
(defun process-menu-delete-process ()
|
||
"Kill process at point in a `list-processes' buffer."
|
||
(interactive)
|
||
(delete-process (tabulated-list-get-id))
|
||
(revert-buffer))
|
||
|
||
(defun list-processes--refresh ()
|
||
"Recompute the list of processes for the Process List buffer.
|
||
Also, delete any process that is exited or signaled."
|
||
(setq tabulated-list-entries nil)
|
||
(dolist (p (process-list))
|
||
(cond ((memq (process-status p) '(exit signal closed))
|
||
(delete-process p))
|
||
((or (not process-menu-query-only)
|
||
(process-query-on-exit-flag p))
|
||
(let* ((buf (process-buffer p))
|
||
(type (process-type p))
|
||
(name (process-name p))
|
||
(status (symbol-name (process-status p)))
|
||
(buf-label (if (buffer-live-p buf)
|
||
`(,(buffer-name buf)
|
||
face link
|
||
help-echo ,(format-message
|
||
"Visit buffer `%s'"
|
||
(buffer-name buf))
|
||
follow-link t
|
||
process-buffer ,buf
|
||
action process-menu-visit-buffer)
|
||
"--"))
|
||
(tty (or (process-tty-name p) "--"))
|
||
(cmd
|
||
(if (memq type '(network serial))
|
||
(let ((contact (process-contact p t)))
|
||
(if (eq type 'network)
|
||
(format "(%s %s)"
|
||
(if (plist-get contact :type)
|
||
"datagram"
|
||
"network")
|
||
(if (plist-get contact :server)
|
||
(format "server on %s"
|
||
(or
|
||
(plist-get contact :host)
|
||
(plist-get contact :local)))
|
||
(format "connection to %s"
|
||
(plist-get contact :host))))
|
||
(format "(serial port %s%s)"
|
||
(or (plist-get contact :port) "?")
|
||
(let ((speed (plist-get contact :speed)))
|
||
(if speed
|
||
(format " at %s b/s" speed)
|
||
"")))))
|
||
(mapconcat 'identity (process-command p) " "))))
|
||
(push (list p (vector name status buf-label tty cmd))
|
||
tabulated-list-entries))))))
|
||
|
||
(defun process-menu-visit-buffer (button)
|
||
(display-buffer (button-get button 'process-buffer)))
|
||
|
||
(defun list-processes (&optional query-only buffer)
|
||
"Display a list of all processes that are Emacs sub-processes.
|
||
If optional argument QUERY-ONLY is non-nil, only processes with
|
||
the query-on-exit flag set are listed.
|
||
Any process listed as exited or signaled is actually eliminated
|
||
after the listing is made.
|
||
Optional argument BUFFER specifies a buffer to use, instead of
|
||
\"*Process List*\".
|
||
The return value is always nil.
|
||
|
||
This function lists only processes that were launched by Emacs. To
|
||
see other processes running on the system, use `list-system-processes'."
|
||
(interactive)
|
||
(or (fboundp 'process-list)
|
||
(error "Asynchronous subprocesses are not supported on this system"))
|
||
(unless (bufferp buffer)
|
||
(setq buffer (get-buffer-create "*Process List*")))
|
||
(with-current-buffer buffer
|
||
(process-menu-mode)
|
||
(setq process-menu-query-only query-only)
|
||
(list-processes--refresh)
|
||
(tabulated-list-print))
|
||
(display-buffer buffer)
|
||
nil)
|
||
|
||
;;;; Prefix commands
|
||
|
||
(setq prefix-command--needs-update nil)
|
||
(setq prefix-command--last-echo nil)
|
||
|
||
(defun internal-echo-keystrokes-prefix ()
|
||
;; BEWARE: Called directly from the C code.
|
||
(if (not prefix-command--needs-update)
|
||
prefix-command--last-echo
|
||
(setq prefix-command--last-echo
|
||
(let ((strs nil))
|
||
(run-hook-wrapped 'prefix-command-echo-keystrokes-functions
|
||
(lambda (fun) (push (funcall fun) strs)))
|
||
(setq strs (delq nil strs))
|
||
(when strs (mapconcat #'identity strs " "))))))
|
||
|
||
(defvar prefix-command-echo-keystrokes-functions nil
|
||
"Abnormal hook which constructs the description of the current prefix state.
|
||
Each function is called with no argument, should return a string or nil.")
|
||
|
||
(defun prefix-command-update ()
|
||
"Update state of prefix commands.
|
||
Call it whenever you change the \"prefix command state\"."
|
||
(setq prefix-command--needs-update t))
|
||
|
||
(defvar prefix-command-preserve-state-hook nil
|
||
"Normal hook run when a command needs to preserve the prefix.")
|
||
|
||
(defun prefix-command-preserve-state ()
|
||
"Pass the current prefix command state to the next command.
|
||
Should be called by all prefix commands.
|
||
Runs `prefix-command-preserve-state-hook'."
|
||
(run-hooks 'prefix-command-preserve-state-hook)
|
||
;; If the current command is a prefix command, we don't want the next (real)
|
||
;; command to have `last-command' set to, say, `universal-argument'.
|
||
(setq this-command last-command)
|
||
(setq real-this-command real-last-command)
|
||
(prefix-command-update))
|
||
|
||
(defun reset-this-command-lengths ()
|
||
(declare (obsolete prefix-command-preserve-state "25.1"))
|
||
nil)
|
||
|
||
;;;;; The main prefix command.
|
||
|
||
;; FIXME: Declaration of `prefix-arg' should be moved here!?
|
||
|
||
(add-hook 'prefix-command-echo-keystrokes-functions
|
||
#'universal-argument--description)
|
||
(defun universal-argument--description ()
|
||
(when prefix-arg
|
||
(concat "C-u"
|
||
(pcase prefix-arg
|
||
(`(-) " -")
|
||
(`(,(and (pred integerp) n))
|
||
(let ((str ""))
|
||
(while (and (> n 4) (= (mod n 4) 0))
|
||
(setq str (concat str " C-u"))
|
||
(setq n (/ n 4)))
|
||
(if (= n 4) str (format " %s" prefix-arg))))
|
||
(_ (format " %s" prefix-arg))))))
|
||
|
||
(add-hook 'prefix-command-preserve-state-hook
|
||
#'universal-argument--preserve)
|
||
(defun universal-argument--preserve ()
|
||
(setq prefix-arg current-prefix-arg))
|
||
|
||
(defvar universal-argument-map
|
||
(let ((map (make-sparse-keymap))
|
||
(universal-argument-minus
|
||
;; For backward compatibility, minus with no modifiers is an ordinary
|
||
;; command if digits have already been entered.
|
||
`(menu-item "" negative-argument
|
||
:filter ,(lambda (cmd)
|
||
(if (integerp prefix-arg) nil cmd)))))
|
||
(define-key map [switch-frame]
|
||
(lambda (e) (interactive "e")
|
||
(handle-switch-frame e) (universal-argument--mode)))
|
||
(define-key map [?\C-u] 'universal-argument-more)
|
||
(define-key map [?-] universal-argument-minus)
|
||
(define-key map [?0] 'digit-argument)
|
||
(define-key map [?1] 'digit-argument)
|
||
(define-key map [?2] 'digit-argument)
|
||
(define-key map [?3] 'digit-argument)
|
||
(define-key map [?4] 'digit-argument)
|
||
(define-key map [?5] 'digit-argument)
|
||
(define-key map [?6] 'digit-argument)
|
||
(define-key map [?7] 'digit-argument)
|
||
(define-key map [?8] 'digit-argument)
|
||
(define-key map [?9] 'digit-argument)
|
||
(define-key map [kp-0] 'digit-argument)
|
||
(define-key map [kp-1] 'digit-argument)
|
||
(define-key map [kp-2] 'digit-argument)
|
||
(define-key map [kp-3] 'digit-argument)
|
||
(define-key map [kp-4] 'digit-argument)
|
||
(define-key map [kp-5] 'digit-argument)
|
||
(define-key map [kp-6] 'digit-argument)
|
||
(define-key map [kp-7] 'digit-argument)
|
||
(define-key map [kp-8] 'digit-argument)
|
||
(define-key map [kp-9] 'digit-argument)
|
||
(define-key map [kp-subtract] universal-argument-minus)
|
||
map)
|
||
"Keymap used while processing \\[universal-argument].")
|
||
|
||
(defun universal-argument--mode ()
|
||
(prefix-command-update)
|
||
(set-transient-map universal-argument-map nil))
|
||
|
||
(defun universal-argument ()
|
||
"Begin a numeric argument for the following command.
|
||
Digits or minus sign following \\[universal-argument] make up the numeric argument.
|
||
\\[universal-argument] following the digits or minus sign ends the argument.
|
||
\\[universal-argument] without digits or minus sign provides 4 as argument.
|
||
Repeating \\[universal-argument] without digits or minus sign
|
||
multiplies the argument by 4 each time.
|
||
For some commands, just \\[universal-argument] by itself serves as a flag
|
||
which is different in effect from any particular numeric argument.
|
||
These commands include \\[set-mark-command] and \\[start-kbd-macro]."
|
||
(interactive)
|
||
(prefix-command-preserve-state)
|
||
(setq prefix-arg (list 4))
|
||
(universal-argument--mode))
|
||
|
||
(defun universal-argument-more (arg)
|
||
;; A subsequent C-u means to multiply the factor by 4 if we've typed
|
||
;; nothing but C-u's; otherwise it means to terminate the prefix arg.
|
||
(interactive "P")
|
||
(prefix-command-preserve-state)
|
||
(setq prefix-arg (if (consp arg)
|
||
(list (* 4 (car arg)))
|
||
(if (eq arg '-)
|
||
(list -4)
|
||
arg)))
|
||
(when (consp prefix-arg) (universal-argument--mode)))
|
||
|
||
(defun negative-argument (arg)
|
||
"Begin a negative numeric argument for the next command.
|
||
\\[universal-argument] following digits or minus sign ends the argument."
|
||
(interactive "P")
|
||
(prefix-command-preserve-state)
|
||
(setq prefix-arg (cond ((integerp arg) (- arg))
|
||
((eq arg '-) nil)
|
||
(t '-)))
|
||
(universal-argument--mode))
|
||
|
||
(defun digit-argument (arg)
|
||
"Part of the numeric argument for the next command.
|
||
\\[universal-argument] following digits or minus sign ends the argument."
|
||
(interactive "P")
|
||
(prefix-command-preserve-state)
|
||
(let* ((char (if (integerp last-command-event)
|
||
last-command-event
|
||
(get last-command-event 'ascii-character)))
|
||
(digit (- (logand char ?\177) ?0)))
|
||
(setq prefix-arg (cond ((integerp arg)
|
||
(+ (* arg 10)
|
||
(if (< arg 0) (- digit) digit)))
|
||
((eq arg '-)
|
||
;; Treat -0 as just -, so that -01 will work.
|
||
(if (zerop digit) '- (- digit)))
|
||
(t
|
||
digit))))
|
||
(universal-argument--mode))
|
||
|
||
|
||
(defvar filter-buffer-substring-functions nil
|
||
"This variable is a wrapper hook around `buffer-substring--filter'.")
|
||
(make-obsolete-variable 'filter-buffer-substring-functions
|
||
'filter-buffer-substring-function "24.4")
|
||
|
||
(defvar filter-buffer-substring-function #'buffer-substring--filter
|
||
"Function to perform the filtering in `filter-buffer-substring'.
|
||
The function is called with the same 3 arguments (BEG END DELETE)
|
||
that `filter-buffer-substring' received. It should return the
|
||
buffer substring between BEG and END, after filtering. If DELETE is
|
||
non-nil, it should delete the text between BEG and END from the buffer.")
|
||
|
||
(defvar buffer-substring-filters nil
|
||
"List of filter functions for `buffer-substring--filter'.
|
||
Each function must accept a single argument, a string, and return a string.
|
||
The buffer substring is passed to the first function in the list,
|
||
and the return value of each function is passed to the next.
|
||
As a special convention, point is set to the start of the buffer text
|
||
being operated on (i.e., the first argument of `buffer-substring--filter')
|
||
before these functions are called.")
|
||
(make-obsolete-variable 'buffer-substring-filters
|
||
'filter-buffer-substring-function "24.1")
|
||
|
||
(defun filter-buffer-substring (beg end &optional delete)
|
||
"Return the buffer substring between BEG and END, after filtering.
|
||
If DELETE is non-nil, delete the text between BEG and END from the buffer.
|
||
|
||
This calls the function that `filter-buffer-substring-function' specifies
|
||
\(passing the same three arguments that it received) to do the work,
|
||
and returns whatever it does. The default function does no filtering,
|
||
unless a hook has been set.
|
||
|
||
Use `filter-buffer-substring' instead of `buffer-substring',
|
||
`buffer-substring-no-properties', or `delete-and-extract-region' when
|
||
you want to allow filtering to take place. For example, major or minor
|
||
modes can use `filter-buffer-substring-function' to extract characters
|
||
that are special to a buffer, and should not be copied into other buffers."
|
||
(funcall filter-buffer-substring-function beg end delete))
|
||
|
||
(defun buffer-substring--filter (beg end &optional delete)
|
||
"Default function to use for `filter-buffer-substring-function'.
|
||
Its arguments and return value are as specified for `filter-buffer-substring'.
|
||
This respects the wrapper hook `filter-buffer-substring-functions',
|
||
and the abnormal hook `buffer-substring-filters'.
|
||
No filtering is done unless a hook says to."
|
||
(with-wrapper-hook filter-buffer-substring-functions (beg end delete)
|
||
(cond
|
||
((or delete buffer-substring-filters)
|
||
(save-excursion
|
||
(goto-char beg)
|
||
(let ((string (if delete (delete-and-extract-region beg end)
|
||
(buffer-substring beg end))))
|
||
(dolist (filter buffer-substring-filters)
|
||
(setq string (funcall filter string)))
|
||
string)))
|
||
(t
|
||
(buffer-substring beg end)))))
|
||
|
||
|
||
;;;; Window system cut and paste hooks.
|
||
|
||
(defvar interprogram-cut-function #'gui-select-text
|
||
"Function to call to make a killed region available to other programs.
|
||
Most window systems provide a facility for cutting and pasting
|
||
text between different programs, such as the clipboard on X and
|
||
MS-Windows, or the pasteboard on Nextstep/Mac OS.
|
||
|
||
This variable holds a function that Emacs calls whenever text is
|
||
put in the kill ring, to make the new kill available to other
|
||
programs. The function takes one argument, TEXT, which is a
|
||
string containing the text which should be made available.")
|
||
|
||
(defvar interprogram-paste-function #'gui-selection-value
|
||
"Function to call to get text cut from other programs.
|
||
Most window systems provide a facility for cutting and pasting
|
||
text between different programs, such as the clipboard on X and
|
||
MS-Windows, or the pasteboard on Nextstep/Mac OS.
|
||
|
||
This variable holds a function that Emacs calls to obtain text
|
||
that other programs have provided for pasting. The function is
|
||
called with no arguments. If no other program has provided text
|
||
to paste, the function should return nil (in which case the
|
||
caller, usually `current-kill', should use the top of the Emacs
|
||
kill ring). If another program has provided text to paste, the
|
||
function should return that text as a string (in which case the
|
||
caller should put this string in the kill ring as the latest
|
||
kill).
|
||
|
||
The function may also return a list of strings if the window
|
||
system supports multiple selections. The first string will be
|
||
used as the pasted text, but the other will be placed in the kill
|
||
ring for easy access via `yank-pop'.
|
||
|
||
Note that the function should return a string only if a program
|
||
other than Emacs has provided a string for pasting; if Emacs
|
||
provided the most recent string, the function should return nil.
|
||
If it is difficult to tell whether Emacs or some other program
|
||
provided the current string, it is probably good enough to return
|
||
nil if the string is equal (according to `string=') to the last
|
||
text Emacs provided.")
|
||
|
||
|
||
|
||
;;;; The kill ring data structure.
|
||
|
||
(defvar kill-ring nil
|
||
"List of killed text sequences.
|
||
Since the kill ring is supposed to interact nicely with cut-and-paste
|
||
facilities offered by window systems, use of this variable should
|
||
interact nicely with `interprogram-cut-function' and
|
||
`interprogram-paste-function'. The functions `kill-new',
|
||
`kill-append', and `current-kill' are supposed to implement this
|
||
interaction; you may want to use them instead of manipulating the kill
|
||
ring directly.")
|
||
|
||
(defcustom kill-ring-max 60
|
||
"Maximum length of kill ring before oldest elements are thrown away."
|
||
:type 'integer
|
||
:group 'killing)
|
||
|
||
(defvar kill-ring-yank-pointer nil
|
||
"The tail of the kill ring whose car is the last thing yanked.")
|
||
|
||
(defcustom save-interprogram-paste-before-kill nil
|
||
"Save clipboard strings into kill ring before replacing them.
|
||
When one selects something in another program to paste it into Emacs,
|
||
but kills something in Emacs before actually pasting it,
|
||
this selection is gone unless this variable is non-nil,
|
||
in which case the other program's selection is saved in the `kill-ring'
|
||
before the Emacs kill and one can still paste it using \\[yank] \\[yank-pop]."
|
||
:type 'boolean
|
||
:group 'killing
|
||
:version "23.2")
|
||
|
||
(defcustom kill-do-not-save-duplicates nil
|
||
"Do not add a new string to `kill-ring' if it duplicates the last one.
|
||
The comparison is done using `equal-including-properties'."
|
||
:type 'boolean
|
||
:group 'killing
|
||
:version "23.2")
|
||
|
||
(defun kill-new (string &optional replace)
|
||
"Make STRING the latest kill in the kill ring.
|
||
Set `kill-ring-yank-pointer' to point to it.
|
||
If `interprogram-cut-function' is non-nil, apply it to STRING.
|
||
Optional second argument REPLACE non-nil means that STRING will replace
|
||
the front of the kill ring, rather than being added to the list.
|
||
|
||
When `save-interprogram-paste-before-kill' and `interprogram-paste-function'
|
||
are non-nil, saves the interprogram paste string(s) into `kill-ring' before
|
||
STRING.
|
||
|
||
When the yank handler has a non-nil PARAM element, the original STRING
|
||
argument is not used by `insert-for-yank'. However, since Lisp code
|
||
may access and use elements from the kill ring directly, the STRING
|
||
argument should still be a \"useful\" string for such uses."
|
||
(unless (and kill-do-not-save-duplicates
|
||
;; Due to text properties such as 'yank-handler that
|
||
;; can alter the contents to yank, comparison using
|
||
;; `equal' is unsafe.
|
||
(equal-including-properties string (car kill-ring)))
|
||
(if (fboundp 'menu-bar-update-yank-menu)
|
||
(menu-bar-update-yank-menu string (and replace (car kill-ring)))))
|
||
(when save-interprogram-paste-before-kill
|
||
(let ((interprogram-paste (and interprogram-paste-function
|
||
(funcall interprogram-paste-function))))
|
||
(when interprogram-paste
|
||
(dolist (s (if (listp interprogram-paste)
|
||
(nreverse interprogram-paste)
|
||
(list interprogram-paste)))
|
||
(unless (and kill-do-not-save-duplicates
|
||
(equal-including-properties s (car kill-ring)))
|
||
(push s kill-ring))))))
|
||
(unless (and kill-do-not-save-duplicates
|
||
(equal-including-properties string (car kill-ring)))
|
||
(if (and replace kill-ring)
|
||
(setcar kill-ring string)
|
||
(push string kill-ring)
|
||
(if (> (length kill-ring) kill-ring-max)
|
||
(setcdr (nthcdr (1- kill-ring-max) kill-ring) nil))))
|
||
(setq kill-ring-yank-pointer kill-ring)
|
||
(if interprogram-cut-function
|
||
(funcall interprogram-cut-function string)))
|
||
|
||
;; It has been argued that this should work similar to `self-insert-command'
|
||
;; which merges insertions in undo-list in groups of 20 (hard-coded in cmds.c).
|
||
(defcustom kill-append-merge-undo nil
|
||
"Whether appending to kill ring also makes \\[undo] restore both pieces of text simultaneously."
|
||
:type 'boolean
|
||
:group 'killing
|
||
:version "25.1")
|
||
|
||
(defun kill-append (string before-p)
|
||
"Append STRING to the end of the latest kill in the kill ring.
|
||
If BEFORE-P is non-nil, prepend STRING to the kill.
|
||
Also removes the last undo boundary in the current buffer,
|
||
depending on `kill-append-merge-undo'.
|
||
If `interprogram-cut-function' is set, pass the resulting kill to it."
|
||
(let* ((cur (car kill-ring)))
|
||
(kill-new (if before-p (concat string cur) (concat cur string))
|
||
(or (= (length cur) 0)
|
||
(equal nil (get-text-property 0 'yank-handler cur))))
|
||
(when (and kill-append-merge-undo (not buffer-read-only))
|
||
(let ((prev buffer-undo-list)
|
||
(next (cdr buffer-undo-list)))
|
||
;; find the next undo boundary
|
||
(while (car next)
|
||
(pop next)
|
||
(pop prev))
|
||
;; remove this undo boundary
|
||
(when prev
|
||
(setcdr prev (cdr next)))))))
|
||
|
||
(defcustom yank-pop-change-selection nil
|
||
"Whether rotating the kill ring changes the window system selection.
|
||
If non-nil, whenever the kill ring is rotated (usually via the
|
||
`yank-pop' command), Emacs also calls `interprogram-cut-function'
|
||
to copy the new kill to the window system selection."
|
||
:type 'boolean
|
||
:group 'killing
|
||
:version "23.1")
|
||
|
||
(defun current-kill (n &optional do-not-move)
|
||
"Rotate the yanking point by N places, and then return that kill.
|
||
If N is zero and `interprogram-paste-function' is set to a
|
||
function that returns a string or a list of strings, and if that
|
||
function doesn't return nil, then that string (or list) is added
|
||
to the front of the kill ring and the string (or first string in
|
||
the list) is returned as the latest kill.
|
||
|
||
If N is not zero, and if `yank-pop-change-selection' is
|
||
non-nil, use `interprogram-cut-function' to transfer the
|
||
kill at the new yank point into the window system selection.
|
||
|
||
If optional arg DO-NOT-MOVE is non-nil, then don't actually
|
||
move the yanking point; just return the Nth kill forward."
|
||
|
||
(let ((interprogram-paste (and (= n 0)
|
||
interprogram-paste-function
|
||
(funcall interprogram-paste-function))))
|
||
(if interprogram-paste
|
||
(progn
|
||
;; Disable the interprogram cut function when we add the new
|
||
;; text to the kill ring, so Emacs doesn't try to own the
|
||
;; selection, with identical text.
|
||
(let ((interprogram-cut-function nil))
|
||
(if (listp interprogram-paste)
|
||
(mapc 'kill-new (nreverse interprogram-paste))
|
||
(kill-new interprogram-paste)))
|
||
(car kill-ring))
|
||
(or kill-ring (error "Kill ring is empty"))
|
||
(let ((ARGth-kill-element
|
||
(nthcdr (mod (- n (length kill-ring-yank-pointer))
|
||
(length kill-ring))
|
||
kill-ring)))
|
||
(unless do-not-move
|
||
(setq kill-ring-yank-pointer ARGth-kill-element)
|
||
(when (and yank-pop-change-selection
|
||
(> n 0)
|
||
interprogram-cut-function)
|
||
(funcall interprogram-cut-function (car ARGth-kill-element))))
|
||
(car ARGth-kill-element)))))
|
||
|
||
|
||
|
||
;;;; Commands for manipulating the kill ring.
|
||
|
||
(defcustom kill-read-only-ok nil
|
||
"Non-nil means don't signal an error for killing read-only text."
|
||
:type 'boolean
|
||
:group 'killing)
|
||
|
||
(defun kill-region (beg end &optional region)
|
||
"Kill (\"cut\") text between point and mark.
|
||
This deletes the text from the buffer and saves it in the kill ring.
|
||
The command \\[yank] can retrieve it from there.
|
||
\(If you want to save the region without killing it, use \\[kill-ring-save].)
|
||
|
||
If you want to append the killed region to the last killed text,
|
||
use \\[append-next-kill] before \\[kill-region].
|
||
|
||
If the buffer is read-only, Emacs will beep and refrain from deleting
|
||
the text, but put the text in the kill ring anyway. This means that
|
||
you can use the killing commands to copy text from a read-only buffer.
|
||
|
||
Lisp programs should use this function for killing text.
|
||
(To delete text, use `delete-region'.)
|
||
Supply two arguments, character positions indicating the stretch of text
|
||
to be killed.
|
||
Any command that calls this function is a \"kill command\".
|
||
If the previous command was also a kill command,
|
||
the text killed this time appends to the text killed last time
|
||
to make one entry in the kill ring.
|
||
|
||
The optional argument REGION if non-nil, indicates that we're not just killing
|
||
some text between BEG and END, but we're killing the region."
|
||
;; Pass mark first, then point, because the order matters when
|
||
;; calling `kill-append'.
|
||
(interactive (list (mark) (point) 'region))
|
||
(unless (and beg end)
|
||
(user-error "The mark is not set now, so there is no region"))
|
||
(condition-case nil
|
||
(let ((string (if region
|
||
(funcall region-extract-function 'delete)
|
||
(filter-buffer-substring beg end 'delete))))
|
||
(when string ;STRING is nil if BEG = END
|
||
;; Add that string to the kill ring, one way or another.
|
||
(if (eq last-command 'kill-region)
|
||
(kill-append string (< end beg))
|
||
(kill-new string)))
|
||
(when (or string (eq last-command 'kill-region))
|
||
(setq this-command 'kill-region))
|
||
(setq deactivate-mark t)
|
||
nil)
|
||
((buffer-read-only text-read-only)
|
||
;; The code above failed because the buffer, or some of the characters
|
||
;; in the region, are read-only.
|
||
;; We should beep, in case the user just isn't aware of this.
|
||
;; However, there's no harm in putting
|
||
;; the region's text in the kill ring, anyway.
|
||
(copy-region-as-kill beg end region)
|
||
;; Set this-command now, so it will be set even if we get an error.
|
||
(setq this-command 'kill-region)
|
||
;; This should barf, if appropriate, and give us the correct error.
|
||
(if kill-read-only-ok
|
||
(progn (message "Read only text copied to kill ring") nil)
|
||
;; Signal an error if the buffer is read-only.
|
||
(barf-if-buffer-read-only)
|
||
;; If the buffer isn't read-only, the text is.
|
||
(signal 'text-read-only (list (current-buffer)))))))
|
||
|
||
;; copy-region-as-kill no longer sets this-command, because it's confusing
|
||
;; to get two copies of the text when the user accidentally types M-w and
|
||
;; then corrects it with the intended C-w.
|
||
(defun copy-region-as-kill (beg end &optional region)
|
||
"Save the region as if killed, but don't kill it.
|
||
In Transient Mark mode, deactivate the mark.
|
||
If `interprogram-cut-function' is non-nil, also save the text for a window
|
||
system cut and paste.
|
||
|
||
The optional argument REGION if non-nil, indicates that we're not just copying
|
||
some text between BEG and END, but we're copying the region.
|
||
|
||
This command's old key binding has been given to `kill-ring-save'."
|
||
;; Pass mark first, then point, because the order matters when
|
||
;; calling `kill-append'.
|
||
(interactive (list (mark) (point)
|
||
(prefix-numeric-value current-prefix-arg)))
|
||
(let ((str (if region
|
||
(funcall region-extract-function nil)
|
||
(filter-buffer-substring beg end))))
|
||
(if (eq last-command 'kill-region)
|
||
(kill-append str (< end beg))
|
||
(kill-new str)))
|
||
(setq deactivate-mark t)
|
||
nil)
|
||
|
||
(defun kill-ring-save (beg end &optional region)
|
||
"Save the region as if killed, but don't kill it.
|
||
In Transient Mark mode, deactivate the mark.
|
||
If `interprogram-cut-function' is non-nil, also save the text for a window
|
||
system cut and paste.
|
||
|
||
If you want to append the killed line to the last killed text,
|
||
use \\[append-next-kill] before \\[kill-ring-save].
|
||
|
||
The optional argument REGION if non-nil, indicates that we're not just copying
|
||
some text between BEG and END, but we're copying the region.
|
||
|
||
This command is similar to `copy-region-as-kill', except that it gives
|
||
visual feedback indicating the extent of the region being copied."
|
||
;; Pass mark first, then point, because the order matters when
|
||
;; calling `kill-append'.
|
||
(interactive (list (mark) (point)
|
||
(prefix-numeric-value current-prefix-arg)))
|
||
(copy-region-as-kill beg end region)
|
||
;; This use of called-interactively-p is correct because the code it
|
||
;; controls just gives the user visual feedback.
|
||
(if (called-interactively-p 'interactive)
|
||
(indicate-copied-region)))
|
||
|
||
(defun indicate-copied-region (&optional message-len)
|
||
"Indicate that the region text has been copied interactively.
|
||
If the mark is visible in the selected window, blink the cursor
|
||
between point and mark if there is currently no active region
|
||
highlighting.
|
||
|
||
If the mark lies outside the selected window, display an
|
||
informative message containing a sample of the copied text. The
|
||
optional argument MESSAGE-LEN, if non-nil, specifies the length
|
||
of this sample text; it defaults to 40."
|
||
(let ((mark (mark t))
|
||
(point (point))
|
||
;; Inhibit quitting so we can make a quit here
|
||
;; look like a C-g typed as a command.
|
||
(inhibit-quit t))
|
||
(if (pos-visible-in-window-p mark (selected-window))
|
||
;; Swap point-and-mark quickly so as to show the region that
|
||
;; was selected. Don't do it if the region is highlighted.
|
||
(unless (and (region-active-p)
|
||
(face-background 'region))
|
||
;; Swap point and mark.
|
||
(set-marker (mark-marker) (point) (current-buffer))
|
||
(goto-char mark)
|
||
(sit-for blink-matching-delay)
|
||
;; Swap back.
|
||
(set-marker (mark-marker) mark (current-buffer))
|
||
(goto-char point)
|
||
;; If user quit, deactivate the mark
|
||
;; as C-g would as a command.
|
||
(and quit-flag (region-active-p)
|
||
(deactivate-mark)))
|
||
(let ((len (min (abs (- mark point))
|
||
(or message-len 40))))
|
||
(if (< point mark)
|
||
;; Don't say "killed"; that is misleading.
|
||
(message "Saved text until \"%s\""
|
||
(buffer-substring-no-properties (- mark len) mark))
|
||
(message "Saved text from \"%s\""
|
||
(buffer-substring-no-properties mark (+ mark len))))))))
|
||
|
||
(defun append-next-kill (&optional interactive)
|
||
"Cause following command, if it kills, to add to previous kill.
|
||
If the next command kills forward from point, the kill is
|
||
appended to the previous killed text. If the command kills
|
||
backward, the kill is prepended. Kill commands that act on the
|
||
region, such as `kill-region', are regarded as killing forward if
|
||
point is after mark, and killing backward if point is before
|
||
mark.
|
||
|
||
If the next command is not a kill command, `append-next-kill' has
|
||
no effect.
|
||
|
||
The argument is used for internal purposes; do not supply one."
|
||
(interactive "p")
|
||
;; We don't use (interactive-p), since that breaks kbd macros.
|
||
(if interactive
|
||
(progn
|
||
(setq this-command 'kill-region)
|
||
(message "If the next command is a kill, it will append"))
|
||
(setq last-command 'kill-region)))
|
||
|
||
(defvar bidi-directional-controls-chars "\x202a-\x202e\x2066-\x2069"
|
||
"Character set that matches bidirectional formatting control characters.")
|
||
|
||
(defvar bidi-directional-non-controls-chars "^\x202a-\x202e\x2066-\x2069"
|
||
"Character set that matches any character except bidirectional controls.")
|
||
|
||
(defun squeeze-bidi-context-1 (from to category replacement)
|
||
"A subroutine of `squeeze-bidi-context'.
|
||
FROM and TO should be markers, CATEGORY and REPLACEMENT should be strings."
|
||
(let ((pt (copy-marker from))
|
||
(limit (copy-marker to))
|
||
(old-pt 0)
|
||
lim1)
|
||
(setq lim1 limit)
|
||
(goto-char pt)
|
||
(while (< pt limit)
|
||
(if (> pt old-pt)
|
||
(move-marker lim1
|
||
(save-excursion
|
||
;; L and R categories include embedding and
|
||
;; override controls, but we don't want to
|
||
;; replace them, because that might change
|
||
;; the visual order. Likewise with PDF and
|
||
;; isolate controls.
|
||
(+ pt (skip-chars-forward
|
||
bidi-directional-non-controls-chars
|
||
limit)))))
|
||
;; Replace any run of non-RTL characters by a single LRM.
|
||
(if (null (re-search-forward category lim1 t))
|
||
;; No more characters of CATEGORY, we are done.
|
||
(setq pt limit)
|
||
(replace-match replacement nil t)
|
||
(move-marker pt (point)))
|
||
(setq old-pt pt)
|
||
;; Skip directional controls, if any.
|
||
(move-marker
|
||
pt (+ pt (skip-chars-forward bidi-directional-controls-chars limit))))))
|
||
|
||
(defun squeeze-bidi-context (from to)
|
||
"Replace characters between FROM and TO while keeping bidi context.
|
||
|
||
This function replaces the region of text with as few characters
|
||
as possible, while preserving the effect that region will have on
|
||
bidirectional display before and after the region."
|
||
(let ((start (set-marker (make-marker)
|
||
(if (> from 0) from (+ (point-max) from))))
|
||
(end (set-marker (make-marker) to))
|
||
;; This is for when they copy text with read-only text
|
||
;; properties.
|
||
(inhibit-read-only t))
|
||
(if (null (marker-position end))
|
||
(setq end (point-max-marker)))
|
||
;; Replace each run of non-RTL characters with a single LRM.
|
||
(squeeze-bidi-context-1 start end "\\CR+" "\x200e")
|
||
;; Replace each run of non-LTR characters with a single RLM. Note
|
||
;; that the \cR category includes both the Arabic Letter (AL) and
|
||
;; R characters; here we ignore the distinction between them,
|
||
;; because that distinction only affects Arabic Number (AN)
|
||
;; characters, which are weak and don't affect the reordering.
|
||
(squeeze-bidi-context-1 start end "\\CL+" "\x200f")))
|
||
|
||
(defun line-substring-with-bidi-context (start end &optional no-properties)
|
||
"Return buffer text between START and END with its bidi context.
|
||
|
||
START and END are assumed to belong to the same physical line
|
||
of buffer text. This function prepends and appends to the text
|
||
between START and END bidi control characters that preserve the
|
||
visual order of that text when it is inserted at some other place."
|
||
(if (or (< start (point-min))
|
||
(> end (point-max)))
|
||
(signal 'args-out-of-range (list (current-buffer) start end)))
|
||
(let ((buf (current-buffer))
|
||
substr para-dir from to)
|
||
(save-excursion
|
||
(goto-char start)
|
||
(setq para-dir (current-bidi-paragraph-direction))
|
||
(setq from (line-beginning-position)
|
||
to (line-end-position))
|
||
(goto-char from)
|
||
;; If we don't have any mixed directional characters in the
|
||
;; entire line, we can just copy the substring without adding
|
||
;; any context.
|
||
(if (or (looking-at-p "\\CR*$")
|
||
(looking-at-p "\\CL*$"))
|
||
(setq substr (if no-properties
|
||
(buffer-substring-no-properties start end)
|
||
(buffer-substring start end)))
|
||
(setq substr
|
||
(with-temp-buffer
|
||
(if no-properties
|
||
(insert-buffer-substring-no-properties buf from to)
|
||
(insert-buffer-substring buf from to))
|
||
(squeeze-bidi-context 1 (1+ (- start from)))
|
||
(squeeze-bidi-context (- end to) nil)
|
||
(buffer-substring 1 (point-max)))))
|
||
|
||
;; Wrap the string in LRI/RLI..PDI pair to achieve 2 effects:
|
||
;; (1) force the string to have the same base embedding
|
||
;; direction as the paragraph direction at the source, no matter
|
||
;; what is the paragraph direction at destination; and (2) avoid
|
||
;; affecting the visual order of the surrounding text at
|
||
;; destination if there are characters of different
|
||
;; directionality there.
|
||
(concat (if (eq para-dir 'left-to-right) "\x2066" "\x2067")
|
||
substr "\x2069"))))
|
||
|
||
(defun buffer-substring-with-bidi-context (start end &optional no-properties)
|
||
"Return portion of current buffer between START and END with bidi context.
|
||
|
||
This function works similar to `buffer-substring', but it prepends and
|
||
appends to the text bidi directional control characters necessary to
|
||
preserve the visual appearance of the text if it is inserted at another
|
||
place. This is useful when the buffer substring includes bidirectional
|
||
text and control characters that cause non-trivial reordering on display.
|
||
If copied verbatim, such text can have a very different visual appearance,
|
||
and can also change the visual appearance of the surrounding text at the
|
||
destination of the copy.
|
||
|
||
Optional argument NO-PROPERTIES, if non-nil, means copy the text without
|
||
the text properties."
|
||
(let (line-end substr)
|
||
(if (or (< start (point-min))
|
||
(> end (point-max)))
|
||
(signal 'args-out-of-range (list (current-buffer) start end)))
|
||
(save-excursion
|
||
(goto-char start)
|
||
(setq line-end (min end (line-end-position)))
|
||
(while (< start end)
|
||
(setq substr
|
||
(concat substr
|
||
(if substr "\n" "")
|
||
(line-substring-with-bidi-context start line-end
|
||
no-properties)))
|
||
(forward-line 1)
|
||
(setq start (point))
|
||
(setq line-end (min end (line-end-position))))
|
||
substr)))
|
||
|
||
;; Yanking.
|
||
|
||
(defcustom yank-handled-properties
|
||
'((font-lock-face . yank-handle-font-lock-face-property)
|
||
(category . yank-handle-category-property))
|
||
"List of special text property handling conditions for yanking.
|
||
Each element should have the form (PROP . FUN), where PROP is a
|
||
property symbol and FUN is a function. When the `yank' command
|
||
inserts text into the buffer, it scans the inserted text for
|
||
stretches of text that have `eq' values of the text property
|
||
PROP; for each such stretch of text, FUN is called with three
|
||
arguments: the property's value in that text, and the start and
|
||
end positions of the text.
|
||
|
||
This is done prior to removing the properties specified by
|
||
`yank-excluded-properties'."
|
||
:group 'killing
|
||
:type '(repeat (cons (symbol :tag "property symbol")
|
||
function))
|
||
:version "24.3")
|
||
|
||
;; This is actually used in subr.el but defcustom does not work there.
|
||
(defcustom yank-excluded-properties
|
||
'(category field follow-link fontified font-lock-face help-echo
|
||
intangible invisible keymap local-map mouse-face read-only
|
||
yank-handler)
|
||
"Text properties to discard when yanking.
|
||
The value should be a list of text properties to discard or t,
|
||
which means to discard all text properties.
|
||
|
||
See also `yank-handled-properties'."
|
||
:type '(choice (const :tag "All" t) (repeat symbol))
|
||
:group 'killing
|
||
:version "24.3")
|
||
|
||
(defvar yank-window-start nil)
|
||
(defvar yank-undo-function nil
|
||
"If non-nil, function used by `yank-pop' to delete last stretch of yanked text.
|
||
Function is called with two parameters, START and END corresponding to
|
||
the value of the mark and point; it is guaranteed that START <= END.
|
||
Normally set from the UNDO element of a yank-handler; see `insert-for-yank'.")
|
||
|
||
(defun yank-pop (&optional arg)
|
||
"Replace just-yanked stretch of killed text with a different stretch.
|
||
This command is allowed only immediately after a `yank' or a `yank-pop'.
|
||
At such a time, the region contains a stretch of reinserted
|
||
previously-killed text. `yank-pop' deletes that text and inserts in its
|
||
place a different stretch of killed text.
|
||
|
||
With no argument, the previous kill is inserted.
|
||
With argument N, insert the Nth previous kill.
|
||
If N is negative, this is a more recent kill.
|
||
|
||
The sequence of kills wraps around, so that after the oldest one
|
||
comes the newest one.
|
||
|
||
When this command inserts killed text into the buffer, it honors
|
||
`yank-excluded-properties' and `yank-handler' as described in the
|
||
doc string for `insert-for-yank-1', which see."
|
||
(interactive "*p")
|
||
(if (not (eq last-command 'yank))
|
||
(user-error "Previous command was not a yank"))
|
||
(setq this-command 'yank)
|
||
(unless arg (setq arg 1))
|
||
(let ((inhibit-read-only t)
|
||
(before (< (point) (mark t))))
|
||
(if before
|
||
(funcall (or yank-undo-function 'delete-region) (point) (mark t))
|
||
(funcall (or yank-undo-function 'delete-region) (mark t) (point)))
|
||
(setq yank-undo-function nil)
|
||
(set-marker (mark-marker) (point) (current-buffer))
|
||
(insert-for-yank (current-kill arg))
|
||
;; Set the window start back where it was in the yank command,
|
||
;; if possible.
|
||
(set-window-start (selected-window) yank-window-start t)
|
||
(if before
|
||
;; This is like exchange-point-and-mark, but doesn't activate the mark.
|
||
;; It is cleaner to avoid activation, even though the command
|
||
;; loop would deactivate the mark because we inserted text.
|
||
(goto-char (prog1 (mark t)
|
||
(set-marker (mark-marker) (point) (current-buffer))))))
|
||
nil)
|
||
|
||
(defun yank (&optional arg)
|
||
"Reinsert (\"paste\") the last stretch of killed text.
|
||
More precisely, reinsert the most recent kill, which is the
|
||
stretch of killed text most recently killed OR yanked. Put point
|
||
at the end, and set mark at the beginning without activating it.
|
||
With just \\[universal-argument] as argument, put point at beginning, and mark at end.
|
||
With argument N, reinsert the Nth most recent kill.
|
||
|
||
When this command inserts text into the buffer, it honors the
|
||
`yank-handled-properties' and `yank-excluded-properties'
|
||
variables, and the `yank-handler' text property. See
|
||
`insert-for-yank-1' for details.
|
||
|
||
See also the command `yank-pop' (\\[yank-pop])."
|
||
(interactive "*P")
|
||
(setq yank-window-start (window-start))
|
||
;; If we don't get all the way thru, make last-command indicate that
|
||
;; for the following command.
|
||
(setq this-command t)
|
||
(push-mark (point))
|
||
(insert-for-yank (current-kill (cond
|
||
((listp arg) 0)
|
||
((eq arg '-) -2)
|
||
(t (1- arg)))))
|
||
(if (consp arg)
|
||
;; This is like exchange-point-and-mark, but doesn't activate the mark.
|
||
;; It is cleaner to avoid activation, even though the command
|
||
;; loop would deactivate the mark because we inserted text.
|
||
(goto-char (prog1 (mark t)
|
||
(set-marker (mark-marker) (point) (current-buffer)))))
|
||
;; If we do get all the way thru, make this-command indicate that.
|
||
(if (eq this-command t)
|
||
(setq this-command 'yank))
|
||
nil)
|
||
|
||
(defun rotate-yank-pointer (arg)
|
||
"Rotate the yanking point in the kill ring.
|
||
With ARG, rotate that many kills forward (or backward, if negative)."
|
||
(interactive "p")
|
||
(current-kill arg))
|
||
|
||
;; Some kill commands.
|
||
|
||
;; Internal subroutine of delete-char
|
||
(defun kill-forward-chars (arg)
|
||
(if (listp arg) (setq arg (car arg)))
|
||
(if (eq arg '-) (setq arg -1))
|
||
(kill-region (point) (+ (point) arg)))
|
||
|
||
;; Internal subroutine of backward-delete-char
|
||
(defun kill-backward-chars (arg)
|
||
(if (listp arg) (setq arg (car arg)))
|
||
(if (eq arg '-) (setq arg -1))
|
||
(kill-region (point) (- (point) arg)))
|
||
|
||
(defcustom backward-delete-char-untabify-method 'untabify
|
||
"The method for untabifying when deleting backward.
|
||
Can be `untabify' -- turn a tab to many spaces, then delete one space;
|
||
`hungry' -- delete all whitespace, both tabs and spaces;
|
||
`all' -- delete all whitespace, including tabs, spaces and newlines;
|
||
nil -- just delete one character."
|
||
:type '(choice (const untabify) (const hungry) (const all) (const nil))
|
||
:version "20.3"
|
||
:group 'killing)
|
||
|
||
(defun backward-delete-char-untabify (arg &optional killp)
|
||
"Delete characters backward, changing tabs into spaces.
|
||
The exact behavior depends on `backward-delete-char-untabify-method'.
|
||
Delete ARG chars, and kill (save in kill ring) if KILLP is non-nil.
|
||
Interactively, ARG is the prefix arg (default 1)
|
||
and KILLP is t if a prefix arg was specified."
|
||
(interactive "*p\nP")
|
||
(when (eq backward-delete-char-untabify-method 'untabify)
|
||
(let ((count arg))
|
||
(save-excursion
|
||
(while (and (> count 0) (not (bobp)))
|
||
(if (= (preceding-char) ?\t)
|
||
(let ((col (current-column)))
|
||
(forward-char -1)
|
||
(setq col (- col (current-column)))
|
||
(insert-char ?\s col)
|
||
(delete-char 1)))
|
||
(forward-char -1)
|
||
(setq count (1- count))))))
|
||
(let* ((skip (cond ((eq backward-delete-char-untabify-method 'hungry) " \t")
|
||
((eq backward-delete-char-untabify-method 'all)
|
||
" \t\n\r")))
|
||
(n (if skip
|
||
(let* ((oldpt (point))
|
||
(wh (- oldpt (save-excursion
|
||
(skip-chars-backward skip)
|
||
(constrain-to-field nil oldpt)))))
|
||
(+ arg (if (zerop wh) 0 (1- wh))))
|
||
arg)))
|
||
;; Avoid warning about delete-backward-char
|
||
(with-no-warnings (delete-backward-char n killp))))
|
||
|
||
(defun zap-to-char (arg char)
|
||
"Kill up to and including ARGth occurrence of CHAR.
|
||
Case is ignored if `case-fold-search' is non-nil in the current buffer.
|
||
Goes backward if ARG is negative; error if CHAR not found."
|
||
(interactive (list (prefix-numeric-value current-prefix-arg)
|
||
(read-char "Zap to char: " t)))
|
||
;; Avoid "obsolete" warnings for translation-table-for-input.
|
||
(with-no-warnings
|
||
(if (char-table-p translation-table-for-input)
|
||
(setq char (or (aref translation-table-for-input char) char))))
|
||
(kill-region (point) (progn
|
||
(search-forward (char-to-string char) nil nil arg)
|
||
(point))))
|
||
|
||
;; kill-line and its subroutines.
|
||
|
||
(defcustom kill-whole-line nil
|
||
"If non-nil, `kill-line' with no arg at start of line kills the whole line."
|
||
:type 'boolean
|
||
:group 'killing)
|
||
|
||
(defun kill-line (&optional arg)
|
||
"Kill the rest of the current line; if no nonblanks there, kill thru newline.
|
||
With prefix argument ARG, kill that many lines from point.
|
||
Negative arguments kill lines backward.
|
||
With zero argument, kills the text before point on the current line.
|
||
|
||
When calling from a program, nil means \"no arg\",
|
||
a number counts as a prefix arg.
|
||
|
||
To kill a whole line, when point is not at the beginning, type \
|
||
\\[move-beginning-of-line] \\[kill-line] \\[kill-line].
|
||
|
||
If `show-trailing-whitespace' is non-nil, this command will just
|
||
kill the rest of the current line, even if there are only
|
||
nonblanks there.
|
||
|
||
If option `kill-whole-line' is non-nil, then this command kills the whole line
|
||
including its terminating newline, when used at the beginning of a line
|
||
with no argument. As a consequence, you can always kill a whole line
|
||
by typing \\[move-beginning-of-line] \\[kill-line].
|
||
|
||
If you want to append the killed line to the last killed text,
|
||
use \\[append-next-kill] before \\[kill-line].
|
||
|
||
If the buffer is read-only, Emacs will beep and refrain from deleting
|
||
the line, but put the line in the kill ring anyway. This means that
|
||
you can use this command to copy text from a read-only buffer.
|
||
\(If the variable `kill-read-only-ok' is non-nil, then this won't
|
||
even beep.)"
|
||
(interactive "P")
|
||
(kill-region (point)
|
||
;; It is better to move point to the other end of the kill
|
||
;; before killing. That way, in a read-only buffer, point
|
||
;; moves across the text that is copied to the kill ring.
|
||
;; The choice has no effect on undo now that undo records
|
||
;; the value of point from before the command was run.
|
||
(progn
|
||
(if arg
|
||
(forward-visible-line (prefix-numeric-value arg))
|
||
(if (eobp)
|
||
(signal 'end-of-buffer nil))
|
||
(let ((end
|
||
(save-excursion
|
||
(end-of-visible-line) (point))))
|
||
(if (or (save-excursion
|
||
;; If trailing whitespace is visible,
|
||
;; don't treat it as nothing.
|
||
(unless show-trailing-whitespace
|
||
(skip-chars-forward " \t" end))
|
||
(= (point) end))
|
||
(and kill-whole-line (bolp)))
|
||
(forward-visible-line 1)
|
||
(goto-char end))))
|
||
(point))))
|
||
|
||
(defun kill-whole-line (&optional arg)
|
||
"Kill current line.
|
||
With prefix ARG, kill that many lines starting from the current line.
|
||
If ARG is negative, kill backward. Also kill the preceding newline.
|
||
\(This is meant to make \\[repeat] work well with negative arguments.)
|
||
If ARG is zero, kill current line but exclude the trailing newline."
|
||
(interactive "p")
|
||
(or arg (setq arg 1))
|
||
(if (and (> arg 0) (eobp) (save-excursion (forward-visible-line 0) (eobp)))
|
||
(signal 'end-of-buffer nil))
|
||
(if (and (< arg 0) (bobp) (save-excursion (end-of-visible-line) (bobp)))
|
||
(signal 'beginning-of-buffer nil))
|
||
(unless (eq last-command 'kill-region)
|
||
(kill-new "")
|
||
(setq last-command 'kill-region))
|
||
(cond ((zerop arg)
|
||
;; We need to kill in two steps, because the previous command
|
||
;; could have been a kill command, in which case the text
|
||
;; before point needs to be prepended to the current kill
|
||
;; ring entry and the text after point appended. Also, we
|
||
;; need to use save-excursion to avoid copying the same text
|
||
;; twice to the kill ring in read-only buffers.
|
||
(save-excursion
|
||
(kill-region (point) (progn (forward-visible-line 0) (point))))
|
||
(kill-region (point) (progn (end-of-visible-line) (point))))
|
||
((< arg 0)
|
||
(save-excursion
|
||
(kill-region (point) (progn (end-of-visible-line) (point))))
|
||
(kill-region (point)
|
||
(progn (forward-visible-line (1+ arg))
|
||
(unless (bobp) (backward-char))
|
||
(point))))
|
||
(t
|
||
(save-excursion
|
||
(kill-region (point) (progn (forward-visible-line 0) (point))))
|
||
(kill-region (point)
|
||
(progn (forward-visible-line arg) (point))))))
|
||
|
||
(defun forward-visible-line (arg)
|
||
"Move forward by ARG lines, ignoring currently invisible newlines only.
|
||
If ARG is negative, move backward -ARG lines.
|
||
If ARG is zero, move to the beginning of the current line."
|
||
(condition-case nil
|
||
(if (> arg 0)
|
||
(progn
|
||
(while (> arg 0)
|
||
(or (zerop (forward-line 1))
|
||
(signal 'end-of-buffer nil))
|
||
;; If the newline we just skipped is invisible,
|
||
;; don't count it.
|
||
(let ((prop
|
||
(get-char-property (1- (point)) 'invisible)))
|
||
(if (if (eq buffer-invisibility-spec t)
|
||
prop
|
||
(or (memq prop buffer-invisibility-spec)
|
||
(assq prop buffer-invisibility-spec)))
|
||
(setq arg (1+ arg))))
|
||
(setq arg (1- arg)))
|
||
;; If invisible text follows, and it is a number of complete lines,
|
||
;; skip it.
|
||
(let ((opoint (point)))
|
||
(while (and (not (eobp))
|
||
(let ((prop
|
||
(get-char-property (point) 'invisible)))
|
||
(if (eq buffer-invisibility-spec t)
|
||
prop
|
||
(or (memq prop buffer-invisibility-spec)
|
||
(assq prop buffer-invisibility-spec)))))
|
||
(goto-char
|
||
(if (get-text-property (point) 'invisible)
|
||
(or (next-single-property-change (point) 'invisible)
|
||
(point-max))
|
||
(next-overlay-change (point)))))
|
||
(unless (bolp)
|
||
(goto-char opoint))))
|
||
(let ((first t))
|
||
(while (or first (<= arg 0))
|
||
(if first
|
||
(beginning-of-line)
|
||
(or (zerop (forward-line -1))
|
||
(signal 'beginning-of-buffer nil)))
|
||
;; If the newline we just moved to is invisible,
|
||
;; don't count it.
|
||
(unless (bobp)
|
||
(let ((prop
|
||
(get-char-property (1- (point)) 'invisible)))
|
||
(unless (if (eq buffer-invisibility-spec t)
|
||
prop
|
||
(or (memq prop buffer-invisibility-spec)
|
||
(assq prop buffer-invisibility-spec)))
|
||
(setq arg (1+ arg)))))
|
||
(setq first nil))
|
||
;; If invisible text follows, and it is a number of complete lines,
|
||
;; skip it.
|
||
(let ((opoint (point)))
|
||
(while (and (not (bobp))
|
||
(let ((prop
|
||
(get-char-property (1- (point)) 'invisible)))
|
||
(if (eq buffer-invisibility-spec t)
|
||
prop
|
||
(or (memq prop buffer-invisibility-spec)
|
||
(assq prop buffer-invisibility-spec)))))
|
||
(goto-char
|
||
(if (get-text-property (1- (point)) 'invisible)
|
||
(or (previous-single-property-change (point) 'invisible)
|
||
(point-min))
|
||
(previous-overlay-change (point)))))
|
||
(unless (bolp)
|
||
(goto-char opoint)))))
|
||
((beginning-of-buffer end-of-buffer)
|
||
nil)))
|
||
|
||
(defun end-of-visible-line ()
|
||
"Move to end of current visible line."
|
||
(end-of-line)
|
||
;; If the following character is currently invisible,
|
||
;; skip all characters with that same `invisible' property value,
|
||
;; then find the next newline.
|
||
(while (and (not (eobp))
|
||
(save-excursion
|
||
(skip-chars-forward "^\n")
|
||
(let ((prop
|
||
(get-char-property (point) 'invisible)))
|
||
(if (eq buffer-invisibility-spec t)
|
||
prop
|
||
(or (memq prop buffer-invisibility-spec)
|
||
(assq prop buffer-invisibility-spec))))))
|
||
(skip-chars-forward "^\n")
|
||
(if (get-text-property (point) 'invisible)
|
||
(goto-char (or (next-single-property-change (point) 'invisible)
|
||
(point-max)))
|
||
(goto-char (next-overlay-change (point))))
|
||
(end-of-line)))
|
||
|
||
(defun insert-buffer (buffer)
|
||
"Insert after point the contents of BUFFER.
|
||
Puts mark after the inserted text.
|
||
BUFFER may be a buffer or a buffer name."
|
||
(declare (interactive-only insert-buffer-substring))
|
||
(interactive
|
||
(list
|
||
(progn
|
||
(barf-if-buffer-read-only)
|
||
(read-buffer "Insert buffer: "
|
||
(if (eq (selected-window) (next-window))
|
||
(other-buffer (current-buffer))
|
||
(window-buffer (next-window)))
|
||
t))))
|
||
(push-mark
|
||
(save-excursion
|
||
(insert-buffer-substring (get-buffer buffer))
|
||
(point)))
|
||
nil)
|
||
|
||
(defun append-to-buffer (buffer start end)
|
||
"Append to specified buffer the text of the region.
|
||
It is inserted into that buffer before its point.
|
||
|
||
When calling from a program, give three arguments:
|
||
BUFFER (or buffer name), START and END.
|
||
START and END specify the portion of the current buffer to be copied."
|
||
(interactive
|
||
(list (read-buffer "Append to buffer: " (other-buffer (current-buffer) t))
|
||
(region-beginning) (region-end)))
|
||
(let* ((oldbuf (current-buffer))
|
||
(append-to (get-buffer-create buffer))
|
||
(windows (get-buffer-window-list append-to t t))
|
||
point)
|
||
(save-excursion
|
||
(with-current-buffer append-to
|
||
(setq point (point))
|
||
(barf-if-buffer-read-only)
|
||
(insert-buffer-substring oldbuf start end)
|
||
(dolist (window windows)
|
||
(when (= (window-point window) point)
|
||
(set-window-point window (point))))))))
|
||
|
||
(defun prepend-to-buffer (buffer start end)
|
||
"Prepend to specified buffer the text of the region.
|
||
It is inserted into that buffer after its point.
|
||
|
||
When calling from a program, give three arguments:
|
||
BUFFER (or buffer name), START and END.
|
||
START and END specify the portion of the current buffer to be copied."
|
||
(interactive "BPrepend to buffer: \nr")
|
||
(let ((oldbuf (current-buffer)))
|
||
(with-current-buffer (get-buffer-create buffer)
|
||
(barf-if-buffer-read-only)
|
||
(save-excursion
|
||
(insert-buffer-substring oldbuf start end)))))
|
||
|
||
(defun copy-to-buffer (buffer start end)
|
||
"Copy to specified buffer the text of the region.
|
||
It is inserted into that buffer, replacing existing text there.
|
||
|
||
When calling from a program, give three arguments:
|
||
BUFFER (or buffer name), START and END.
|
||
START and END specify the portion of the current buffer to be copied."
|
||
(interactive "BCopy to buffer: \nr")
|
||
(let ((oldbuf (current-buffer)))
|
||
(with-current-buffer (get-buffer-create buffer)
|
||
(barf-if-buffer-read-only)
|
||
(erase-buffer)
|
||
(save-excursion
|
||
(insert-buffer-substring oldbuf start end)))))
|
||
|
||
(define-error 'mark-inactive (purecopy "The mark is not active now"))
|
||
|
||
(defvar activate-mark-hook nil
|
||
"Hook run when the mark becomes active.
|
||
It is also run at the end of a command, if the mark is active and
|
||
it is possible that the region may have changed.")
|
||
|
||
(defvar deactivate-mark-hook nil
|
||
"Hook run when the mark becomes inactive.")
|
||
|
||
(defun mark (&optional force)
|
||
"Return this buffer's mark value as integer, or nil if never set.
|
||
|
||
In Transient Mark mode, this function signals an error if
|
||
the mark is not active. However, if `mark-even-if-inactive' is non-nil,
|
||
or the argument FORCE is non-nil, it disregards whether the mark
|
||
is active, and returns an integer or nil in the usual way.
|
||
|
||
If you are using this in an editing command, you are most likely making
|
||
a mistake; see the documentation of `set-mark'."
|
||
(if (or force (not transient-mark-mode) mark-active mark-even-if-inactive)
|
||
(marker-position (mark-marker))
|
||
(signal 'mark-inactive nil)))
|
||
|
||
;; Behind display-selections-p.
|
||
|
||
(defun deactivate-mark (&optional force)
|
||
"Deactivate the mark.
|
||
If Transient Mark mode is disabled, this function normally does
|
||
nothing; but if FORCE is non-nil, it deactivates the mark anyway.
|
||
|
||
Deactivating the mark sets `mark-active' to nil, updates the
|
||
primary selection according to `select-active-regions', and runs
|
||
`deactivate-mark-hook'.
|
||
|
||
If Transient Mark mode was temporarily enabled, reset the value
|
||
of the variable `transient-mark-mode'; if this causes Transient
|
||
Mark mode to be disabled, don't change `mark-active' to nil or
|
||
run `deactivate-mark-hook'."
|
||
(when (or (region-active-p) force)
|
||
(when (and (if (eq select-active-regions 'only)
|
||
(eq (car-safe transient-mark-mode) 'only)
|
||
select-active-regions)
|
||
(region-active-p)
|
||
(display-selections-p))
|
||
;; The var `saved-region-selection', if non-nil, is the text in
|
||
;; the region prior to the last command modifying the buffer.
|
||
;; Set the selection to that, or to the current region.
|
||
(cond (saved-region-selection
|
||
(if (gui-backend-selection-owner-p 'PRIMARY)
|
||
(gui-set-selection 'PRIMARY saved-region-selection))
|
||
(setq saved-region-selection nil))
|
||
;; If another program has acquired the selection, region
|
||
;; deactivation should not clobber it (Bug#11772).
|
||
((and (/= (region-beginning) (region-end))
|
||
(or (gui-backend-selection-owner-p 'PRIMARY)
|
||
(null (gui-backend-selection-exists-p 'PRIMARY))))
|
||
(gui-set-selection 'PRIMARY
|
||
(funcall region-extract-function nil)))))
|
||
(when mark-active (force-mode-line-update)) ;Refresh toolbar (bug#16382).
|
||
(cond
|
||
((eq (car-safe transient-mark-mode) 'only)
|
||
(setq transient-mark-mode (cdr transient-mark-mode))
|
||
(if (eq transient-mark-mode (default-value 'transient-mark-mode))
|
||
(kill-local-variable 'transient-mark-mode)))
|
||
((eq transient-mark-mode 'lambda)
|
||
(kill-local-variable 'transient-mark-mode)))
|
||
(setq mark-active nil)
|
||
(run-hooks 'deactivate-mark-hook)
|
||
(redisplay--update-region-highlight (selected-window))))
|
||
|
||
(defun activate-mark (&optional no-tmm)
|
||
"Activate the mark.
|
||
If NO-TMM is non-nil, leave `transient-mark-mode' alone."
|
||
(when (mark t)
|
||
(unless (region-active-p)
|
||
(force-mode-line-update) ;Refresh toolbar (bug#16382).
|
||
(setq mark-active t)
|
||
(unless (or transient-mark-mode no-tmm)
|
||
(setq-local transient-mark-mode 'lambda))
|
||
(run-hooks 'activate-mark-hook))))
|
||
|
||
(defun set-mark (pos)
|
||
"Set this buffer's mark to POS. Don't use this function!
|
||
That is to say, don't use this function unless you want
|
||
the user to see that the mark has moved, and you want the previous
|
||
mark position to be lost.
|
||
|
||
Normally, when a new mark is set, the old one should go on the stack.
|
||
This is why most applications should use `push-mark', not `set-mark'.
|
||
|
||
Novice Emacs Lisp programmers often try to use the mark for the wrong
|
||
purposes. The mark saves a location for the user's convenience.
|
||
Most editing commands should not alter the mark.
|
||
To remember a location for internal use in the Lisp program,
|
||
store it in a Lisp variable. Example:
|
||
|
||
(let ((beg (point))) (forward-line 1) (delete-region beg (point)))."
|
||
(if pos
|
||
(progn
|
||
(set-marker (mark-marker) pos (current-buffer))
|
||
(activate-mark 'no-tmm))
|
||
;; Normally we never clear mark-active except in Transient Mark mode.
|
||
;; But when we actually clear out the mark value too, we must
|
||
;; clear mark-active in any mode.
|
||
(deactivate-mark t)
|
||
;; `deactivate-mark' sometimes leaves mark-active non-nil, but
|
||
;; it should never be nil if the mark is nil.
|
||
(setq mark-active nil)
|
||
(set-marker (mark-marker) nil)))
|
||
|
||
(defun save-mark-and-excursion--save ()
|
||
(cons
|
||
(let ((mark (mark-marker)))
|
||
(and (marker-position mark) (copy-marker mark)))
|
||
mark-active))
|
||
|
||
(defun save-mark-and-excursion--restore (saved-mark-info)
|
||
(let ((saved-mark (car saved-mark-info))
|
||
(omark (marker-position (mark-marker)))
|
||
(nmark nil)
|
||
(saved-mark-active (cdr saved-mark-info)))
|
||
;; Mark marker
|
||
(if (null saved-mark)
|
||
(set-marker (mark-marker) nil)
|
||
(setf nmark (marker-position saved-mark))
|
||
(set-marker (mark-marker) nmark)
|
||
(set-marker saved-mark nil))
|
||
;; Mark active
|
||
(let ((cur-mark-active mark-active))
|
||
(setq mark-active saved-mark-active)
|
||
;; If mark is active now, and either was not active or was at a
|
||
;; different place, run the activate hook.
|
||
(if saved-mark-active
|
||
(when (or (not cur-mark-active)
|
||
(not (eq omark nmark)))
|
||
(run-hooks 'activate-mark-hook))
|
||
;; If mark has ceased to be active, run deactivate hook.
|
||
(when cur-mark-active
|
||
(run-hooks 'deactivate-mark-hook))))))
|
||
|
||
(defmacro save-mark-and-excursion (&rest body)
|
||
"Like `save-excursion', but also save and restore the mark state.
|
||
This macro does what `save-excursion' did before Emacs 25.1."
|
||
(let ((saved-marker-sym (make-symbol "saved-marker")))
|
||
`(let ((,saved-marker-sym (save-mark-and-excursion--save)))
|
||
(unwind-protect
|
||
(save-excursion ,@body)
|
||
(save-mark-and-excursion--restore ,saved-marker-sym)))))
|
||
|
||
(defcustom use-empty-active-region nil
|
||
"Whether \"region-aware\" commands should act on empty regions.
|
||
If nil, region-aware commands treat empty regions as inactive.
|
||
If non-nil, region-aware commands treat the region as active as
|
||
long as the mark is active, even if the region is empty.
|
||
|
||
Region-aware commands are those that act on the region if it is
|
||
active and Transient Mark mode is enabled, and on the text near
|
||
point otherwise."
|
||
:type 'boolean
|
||
:version "23.1"
|
||
:group 'editing-basics)
|
||
|
||
(defun use-region-p ()
|
||
"Return t if the region is active and it is appropriate to act on it.
|
||
This is used by commands that act specially on the region under
|
||
Transient Mark mode.
|
||
|
||
The return value is t if Transient Mark mode is enabled and the
|
||
mark is active; furthermore, if `use-empty-active-region' is nil,
|
||
the region must not be empty. Otherwise, the return value is nil.
|
||
|
||
For some commands, it may be appropriate to ignore the value of
|
||
`use-empty-active-region'; in that case, use `region-active-p'."
|
||
(and (region-active-p)
|
||
(or use-empty-active-region (> (region-end) (region-beginning)))))
|
||
|
||
(defun region-active-p ()
|
||
"Return non-nil if Transient Mark mode is enabled and the mark is active.
|
||
|
||
Some commands act specially on the region when Transient Mark
|
||
mode is enabled. Usually, such commands should use
|
||
`use-region-p' instead of this function, because `use-region-p'
|
||
also checks the value of `use-empty-active-region'."
|
||
(and transient-mark-mode mark-active
|
||
;; FIXME: Somehow we sometimes end up with mark-active non-nil but
|
||
;; without the mark being set (e.g. bug#17324). We really should fix
|
||
;; that problem, but in the mean time, let's make sure we don't say the
|
||
;; region is active when there's no mark.
|
||
(progn (cl-assert (mark)) t)))
|
||
|
||
|
||
(defvar redisplay-unhighlight-region-function
|
||
(lambda (rol) (when (overlayp rol) (delete-overlay rol))))
|
||
|
||
(defvar redisplay-highlight-region-function
|
||
(lambda (start end window rol)
|
||
(if (not (overlayp rol))
|
||
(let ((nrol (make-overlay start end)))
|
||
(funcall redisplay-unhighlight-region-function rol)
|
||
(overlay-put nrol 'window window)
|
||
(overlay-put nrol 'face 'region)
|
||
;; Normal priority so that a large region doesn't hide all the
|
||
;; overlays within it, but high secondary priority so that if it
|
||
;; ends/starts in the middle of a small overlay, that small overlay
|
||
;; won't hide the region's boundaries.
|
||
(overlay-put nrol 'priority '(nil . 100))
|
||
nrol)
|
||
(unless (and (eq (overlay-buffer rol) (current-buffer))
|
||
(eq (overlay-start rol) start)
|
||
(eq (overlay-end rol) end))
|
||
(move-overlay rol start end (current-buffer)))
|
||
rol)))
|
||
|
||
(defun redisplay--update-region-highlight (window)
|
||
(let ((rol (window-parameter window 'internal-region-overlay)))
|
||
(if (not (and (region-active-p)
|
||
(or highlight-nonselected-windows
|
||
(eq window (selected-window))
|
||
(and (window-minibuffer-p)
|
||
(eq window (minibuffer-selected-window))))))
|
||
(funcall redisplay-unhighlight-region-function rol)
|
||
(let* ((pt (window-point window))
|
||
(mark (mark))
|
||
(start (min pt mark))
|
||
(end (max pt mark))
|
||
(new
|
||
(funcall redisplay-highlight-region-function
|
||
start end window rol)))
|
||
(unless (equal new rol)
|
||
(set-window-parameter window 'internal-region-overlay
|
||
new))))))
|
||
|
||
(defvar pre-redisplay-functions (list #'redisplay--update-region-highlight)
|
||
"Hook run just before redisplay.
|
||
It is called in each window that is to be redisplayed. It takes one argument,
|
||
which is the window that will be redisplayed. When run, the `current-buffer'
|
||
is set to the buffer displayed in that window.")
|
||
|
||
(defun redisplay--pre-redisplay-functions (windows)
|
||
(with-demoted-errors "redisplay--pre-redisplay-functions: %S"
|
||
(if (null windows)
|
||
(with-current-buffer (window-buffer (selected-window))
|
||
(run-hook-with-args 'pre-redisplay-functions (selected-window)))
|
||
(dolist (win (if (listp windows) windows (window-list-1 nil nil t)))
|
||
(with-current-buffer (window-buffer win)
|
||
(run-hook-with-args 'pre-redisplay-functions win))))))
|
||
|
||
(add-function :before pre-redisplay-function
|
||
#'redisplay--pre-redisplay-functions)
|
||
|
||
|
||
(defvar-local mark-ring nil
|
||
"The list of former marks of the current buffer, most recent first.")
|
||
(put 'mark-ring 'permanent-local t)
|
||
|
||
(defcustom mark-ring-max 16
|
||
"Maximum size of mark ring. Start discarding off end if gets this big."
|
||
:type 'integer
|
||
:group 'editing-basics)
|
||
|
||
(defvar global-mark-ring nil
|
||
"The list of saved global marks, most recent first.")
|
||
|
||
(defcustom global-mark-ring-max 16
|
||
"Maximum size of global mark ring. \
|
||
Start discarding off end if gets this big."
|
||
:type 'integer
|
||
:group 'editing-basics)
|
||
|
||
(defun pop-to-mark-command ()
|
||
"Jump to mark, and pop a new position for mark off the ring.
|
||
\(Does not affect global mark ring)."
|
||
(interactive)
|
||
(if (null (mark t))
|
||
(user-error "No mark set in this buffer")
|
||
(if (= (point) (mark t))
|
||
(message "Mark popped"))
|
||
(goto-char (mark t))
|
||
(pop-mark)))
|
||
|
||
(defun push-mark-command (arg &optional nomsg)
|
||
"Set mark at where point is.
|
||
If no prefix ARG and mark is already set there, just activate it.
|
||
Display `Mark set' unless the optional second arg NOMSG is non-nil."
|
||
(interactive "P")
|
||
(let ((mark (mark t)))
|
||
(if (or arg (null mark) (/= mark (point)))
|
||
(push-mark nil nomsg t)
|
||
(activate-mark 'no-tmm)
|
||
(unless nomsg
|
||
(message "Mark activated")))))
|
||
|
||
(defcustom set-mark-command-repeat-pop nil
|
||
"Non-nil means repeating \\[set-mark-command] after popping mark pops it again.
|
||
That means that C-u \\[set-mark-command] \\[set-mark-command]
|
||
will pop the mark twice, and
|
||
C-u \\[set-mark-command] \\[set-mark-command] \\[set-mark-command]
|
||
will pop the mark three times.
|
||
|
||
A value of nil means \\[set-mark-command]'s behavior does not change
|
||
after C-u \\[set-mark-command]."
|
||
:type 'boolean
|
||
:group 'editing-basics)
|
||
|
||
(defun set-mark-command (arg)
|
||
"Set the mark where point is, or jump to the mark.
|
||
Setting the mark also alters the region, which is the text
|
||
between point and mark; this is the closest equivalent in
|
||
Emacs to what some editors call the \"selection\".
|
||
|
||
With no prefix argument, set the mark at point, and push the
|
||
old mark position on local mark ring. Also push the old mark on
|
||
global mark ring, if the previous mark was set in another buffer.
|
||
|
||
When Transient Mark Mode is off, immediately repeating this
|
||
command activates `transient-mark-mode' temporarily.
|
||
|
||
With prefix argument (e.g., \\[universal-argument] \\[set-mark-command]), \
|
||
jump to the mark, and set the mark from
|
||
position popped off the local mark ring (this does not affect the global
|
||
mark ring). Use \\[pop-global-mark] to jump to a mark popped off the global
|
||
mark ring (see `pop-global-mark').
|
||
|
||
If `set-mark-command-repeat-pop' is non-nil, repeating
|
||
the \\[set-mark-command] command with no prefix argument pops the next position
|
||
off the local (or global) mark ring and jumps there.
|
||
|
||
With \\[universal-argument] \\[universal-argument] as prefix
|
||
argument, unconditionally set mark where point is, even if
|
||
`set-mark-command-repeat-pop' is non-nil.
|
||
|
||
Novice Emacs Lisp programmers often try to use the mark for the wrong
|
||
purposes. See the documentation of `set-mark' for more information."
|
||
(interactive "P")
|
||
(cond ((eq transient-mark-mode 'lambda)
|
||
(kill-local-variable 'transient-mark-mode))
|
||
((eq (car-safe transient-mark-mode) 'only)
|
||
(deactivate-mark)))
|
||
(cond
|
||
((and (consp arg) (> (prefix-numeric-value arg) 4))
|
||
(push-mark-command nil))
|
||
((not (eq this-command 'set-mark-command))
|
||
(if arg
|
||
(pop-to-mark-command)
|
||
(push-mark-command t)))
|
||
((and set-mark-command-repeat-pop
|
||
(eq last-command 'pop-global-mark)
|
||
(not arg))
|
||
(setq this-command 'pop-global-mark)
|
||
(pop-global-mark))
|
||
((or (and set-mark-command-repeat-pop
|
||
(eq last-command 'pop-to-mark-command))
|
||
arg)
|
||
(setq this-command 'pop-to-mark-command)
|
||
(pop-to-mark-command))
|
||
((eq last-command 'set-mark-command)
|
||
(if (region-active-p)
|
||
(progn
|
||
(deactivate-mark)
|
||
(message "Mark deactivated"))
|
||
(activate-mark)
|
||
(message "Mark activated")))
|
||
(t
|
||
(push-mark-command nil))))
|
||
|
||
(defun push-mark (&optional location nomsg activate)
|
||
"Set mark at LOCATION (point, by default) and push old mark on mark ring.
|
||
If the last global mark pushed was not in the current buffer,
|
||
also push LOCATION on the global mark ring.
|
||
Display `Mark set' unless the optional second arg NOMSG is non-nil.
|
||
|
||
Novice Emacs Lisp programmers often try to use the mark for the wrong
|
||
purposes. See the documentation of `set-mark' for more information.
|
||
|
||
In Transient Mark mode, activate mark if optional third arg ACTIVATE non-nil."
|
||
(unless (null (mark t))
|
||
(setq mark-ring (cons (copy-marker (mark-marker)) mark-ring))
|
||
(when (> (length mark-ring) mark-ring-max)
|
||
(move-marker (car (nthcdr mark-ring-max mark-ring)) nil)
|
||
(setcdr (nthcdr (1- mark-ring-max) mark-ring) nil)))
|
||
(set-marker (mark-marker) (or location (point)) (current-buffer))
|
||
;; Now push the mark on the global mark ring.
|
||
(if (and global-mark-ring
|
||
(eq (marker-buffer (car global-mark-ring)) (current-buffer)))
|
||
;; The last global mark pushed was in this same buffer.
|
||
;; Don't push another one.
|
||
nil
|
||
(setq global-mark-ring (cons (copy-marker (mark-marker)) global-mark-ring))
|
||
(when (> (length global-mark-ring) global-mark-ring-max)
|
||
(move-marker (car (nthcdr global-mark-ring-max global-mark-ring)) nil)
|
||
(setcdr (nthcdr (1- global-mark-ring-max) global-mark-ring) nil)))
|
||
(or nomsg executing-kbd-macro (> (minibuffer-depth) 0)
|
||
(message "Mark set"))
|
||
(if (or activate (not transient-mark-mode))
|
||
(set-mark (mark t)))
|
||
nil)
|
||
|
||
(defun pop-mark ()
|
||
"Pop off mark ring into the buffer's actual mark.
|
||
Does not set point. Does nothing if mark ring is empty."
|
||
(when mark-ring
|
||
(setq mark-ring (nconc mark-ring (list (copy-marker (mark-marker)))))
|
||
(set-marker (mark-marker) (+ 0 (car mark-ring)) (current-buffer))
|
||
(move-marker (car mark-ring) nil)
|
||
(if (null (mark t)) (ding))
|
||
(setq mark-ring (cdr mark-ring)))
|
||
(deactivate-mark))
|
||
|
||
(define-obsolete-function-alias
|
||
'exchange-dot-and-mark 'exchange-point-and-mark "23.3")
|
||
(defun exchange-point-and-mark (&optional arg)
|
||
"Put the mark where point is now, and point where the mark is now.
|
||
This command works even when the mark is not active,
|
||
and it reactivates the mark.
|
||
|
||
If Transient Mark mode is on, a prefix ARG deactivates the mark
|
||
if it is active, and otherwise avoids reactivating it. If
|
||
Transient Mark mode is off, a prefix ARG enables Transient Mark
|
||
mode temporarily."
|
||
(interactive "P")
|
||
(let ((omark (mark t))
|
||
(temp-highlight (eq (car-safe transient-mark-mode) 'only)))
|
||
(if (null omark)
|
||
(user-error "No mark set in this buffer"))
|
||
(set-mark (point))
|
||
(goto-char omark)
|
||
(cond (temp-highlight
|
||
(setq-local transient-mark-mode (cons 'only transient-mark-mode)))
|
||
((or (and arg (region-active-p)) ; (xor arg (not (region-active-p)))
|
||
(not (or arg (region-active-p))))
|
||
(deactivate-mark))
|
||
(t (activate-mark)))
|
||
nil))
|
||
|
||
(defcustom shift-select-mode t
|
||
"When non-nil, shifted motion keys activate the mark momentarily.
|
||
|
||
While the mark is activated in this way, any shift-translated point
|
||
motion key extends the region, and if Transient Mark mode was off, it
|
||
is temporarily turned on. Furthermore, the mark will be deactivated
|
||
by any subsequent point motion key that was not shift-translated, or
|
||
by any action that normally deactivates the mark in Transient Mark mode.
|
||
|
||
See `this-command-keys-shift-translated' for the meaning of
|
||
shift-translation."
|
||
:type 'boolean
|
||
:group 'editing-basics)
|
||
|
||
(defun handle-shift-selection ()
|
||
"Activate/deactivate mark depending on invocation thru shift translation.
|
||
This function is called by `call-interactively' when a command
|
||
with a `^' character in its `interactive' spec is invoked, before
|
||
running the command itself.
|
||
|
||
If `shift-select-mode' is enabled and the command was invoked
|
||
through shift translation, set the mark and activate the region
|
||
temporarily, unless it was already set in this way. See
|
||
`this-command-keys-shift-translated' for the meaning of shift
|
||
translation.
|
||
|
||
Otherwise, if the region has been activated temporarily,
|
||
deactivate it, and restore the variable `transient-mark-mode' to
|
||
its earlier value."
|
||
(cond ((and shift-select-mode this-command-keys-shift-translated)
|
||
(unless (and mark-active
|
||
(eq (car-safe transient-mark-mode) 'only))
|
||
(setq-local transient-mark-mode
|
||
(cons 'only
|
||
(unless (eq transient-mark-mode 'lambda)
|
||
transient-mark-mode)))
|
||
(push-mark nil nil t)))
|
||
((eq (car-safe transient-mark-mode) 'only)
|
||
(setq transient-mark-mode (cdr transient-mark-mode))
|
||
(if (eq transient-mark-mode (default-value 'transient-mark-mode))
|
||
(kill-local-variable 'transient-mark-mode))
|
||
(deactivate-mark))))
|
||
|
||
(define-minor-mode transient-mark-mode
|
||
"Toggle Transient Mark mode.
|
||
With a prefix argument ARG, enable Transient Mark mode if ARG is
|
||
positive, and disable it otherwise. If called from Lisp, enable
|
||
Transient Mark mode if ARG is omitted or nil.
|
||
|
||
Transient Mark mode is a global minor mode. When enabled, the
|
||
region is highlighted with the `region' face whenever the mark
|
||
is active. The mark is \"deactivated\" by changing the buffer,
|
||
and after certain other operations that set the mark but whose
|
||
main purpose is something else--for example, incremental search,
|
||
\\[beginning-of-buffer], and \\[end-of-buffer].
|
||
|
||
You can also deactivate the mark by typing \\[keyboard-quit] or
|
||
\\[keyboard-escape-quit].
|
||
|
||
Many commands change their behavior when Transient Mark mode is
|
||
in effect and the mark is active, by acting on the region instead
|
||
of their usual default part of the buffer's text. Examples of
|
||
such commands include \\[comment-dwim], \\[flush-lines], \\[keep-lines],
|
||
\\[query-replace], \\[query-replace-regexp], \\[ispell], and \\[undo].
|
||
To see the documentation of commands which are sensitive to the
|
||
Transient Mark mode, invoke \\[apropos-documentation] and type \"transient\"
|
||
or \"mark.*active\" at the prompt."
|
||
:global t
|
||
;; It's defined in C/cus-start, this stops the d-m-m macro defining it again.
|
||
:variable (default-value 'transient-mark-mode))
|
||
|
||
(defvar widen-automatically t
|
||
"Non-nil means it is ok for commands to call `widen' when they want to.
|
||
Some commands will do this in order to go to positions outside
|
||
the current accessible part of the buffer.
|
||
|
||
If `widen-automatically' is nil, these commands will do something else
|
||
as a fallback, and won't change the buffer bounds.")
|
||
|
||
(defvar non-essential nil
|
||
"Whether the currently executing code is performing an essential task.
|
||
This variable should be non-nil only when running code which should not
|
||
disturb the user. E.g. it can be used to prevent Tramp from prompting the
|
||
user for a password when we are simply scanning a set of files in the
|
||
background or displaying possible completions before the user even asked
|
||
for it.")
|
||
|
||
(defun pop-global-mark ()
|
||
"Pop off global mark ring and jump to the top location."
|
||
(interactive)
|
||
;; Pop entries which refer to non-existent buffers.
|
||
(while (and global-mark-ring (not (marker-buffer (car global-mark-ring))))
|
||
(setq global-mark-ring (cdr global-mark-ring)))
|
||
(or global-mark-ring
|
||
(error "No global mark set"))
|
||
(let* ((marker (car global-mark-ring))
|
||
(buffer (marker-buffer marker))
|
||
(position (marker-position marker)))
|
||
(setq global-mark-ring (nconc (cdr global-mark-ring)
|
||
(list (car global-mark-ring))))
|
||
(set-buffer buffer)
|
||
(or (and (>= position (point-min))
|
||
(<= position (point-max)))
|
||
(if widen-automatically
|
||
(widen)
|
||
(error "Global mark position is outside accessible part of buffer")))
|
||
(goto-char position)
|
||
(switch-to-buffer buffer)))
|
||
|
||
(defcustom next-line-add-newlines nil
|
||
"If non-nil, `next-line' inserts newline to avoid `end of buffer' error."
|
||
:type 'boolean
|
||
:version "21.1"
|
||
:group 'editing-basics)
|
||
|
||
(defun next-line (&optional arg try-vscroll)
|
||
"Move cursor vertically down ARG lines.
|
||
Interactively, vscroll tall lines if `auto-window-vscroll' is enabled.
|
||
Non-interactively, use TRY-VSCROLL to control whether to vscroll tall
|
||
lines: if either `auto-window-vscroll' or TRY-VSCROLL is nil, this
|
||
function will not vscroll.
|
||
|
||
ARG defaults to 1.
|
||
|
||
If there is no character in the target line exactly under the current column,
|
||
the cursor is positioned after the character in that line which spans this
|
||
column, or at the end of the line if it is not long enough.
|
||
If there is no line in the buffer after this one, behavior depends on the
|
||
value of `next-line-add-newlines'. If non-nil, it inserts a newline character
|
||
to create a line, and moves the cursor to that line. Otherwise it moves the
|
||
cursor to the end of the buffer.
|
||
|
||
If the variable `line-move-visual' is non-nil, this command moves
|
||
by display lines. Otherwise, it moves by buffer lines, without
|
||
taking variable-width characters or continued lines into account.
|
||
|
||
The command \\[set-goal-column] can be used to create
|
||
a semipermanent goal column for this command.
|
||
Then instead of trying to move exactly vertically (or as close as possible),
|
||
this command moves to the specified goal column (or as close as possible).
|
||
The goal column is stored in the variable `goal-column', which is nil
|
||
when there is no goal column. Note that setting `goal-column'
|
||
overrides `line-move-visual' and causes this command to move by buffer
|
||
lines rather than by display lines."
|
||
(declare (interactive-only forward-line))
|
||
(interactive "^p\np")
|
||
(or arg (setq arg 1))
|
||
(if (and next-line-add-newlines (= arg 1))
|
||
(if (save-excursion (end-of-line) (eobp))
|
||
;; When adding a newline, don't expand an abbrev.
|
||
(let ((abbrev-mode nil))
|
||
(end-of-line)
|
||
(insert (if use-hard-newlines hard-newline "\n")))
|
||
(line-move arg nil nil try-vscroll))
|
||
(if (called-interactively-p 'interactive)
|
||
(condition-case err
|
||
(line-move arg nil nil try-vscroll)
|
||
((beginning-of-buffer end-of-buffer)
|
||
(signal (car err) (cdr err))))
|
||
(line-move arg nil nil try-vscroll)))
|
||
nil)
|
||
|
||
(defun previous-line (&optional arg try-vscroll)
|
||
"Move cursor vertically up ARG lines.
|
||
Interactively, vscroll tall lines if `auto-window-vscroll' is enabled.
|
||
Non-interactively, use TRY-VSCROLL to control whether to vscroll tall
|
||
lines: if either `auto-window-vscroll' or TRY-VSCROLL is nil, this
|
||
function will not vscroll.
|
||
|
||
ARG defaults to 1.
|
||
|
||
If there is no character in the target line exactly over the current column,
|
||
the cursor is positioned after the character in that line which spans this
|
||
column, or at the end of the line if it is not long enough.
|
||
|
||
If the variable `line-move-visual' is non-nil, this command moves
|
||
by display lines. Otherwise, it moves by buffer lines, without
|
||
taking variable-width characters or continued lines into account.
|
||
|
||
The command \\[set-goal-column] can be used to create
|
||
a semipermanent goal column for this command.
|
||
Then instead of trying to move exactly vertically (or as close as possible),
|
||
this command moves to the specified goal column (or as close as possible).
|
||
The goal column is stored in the variable `goal-column', which is nil
|
||
when there is no goal column. Note that setting `goal-column'
|
||
overrides `line-move-visual' and causes this command to move by buffer
|
||
lines rather than by display lines."
|
||
(declare (interactive-only
|
||
"use `forward-line' with negative argument instead."))
|
||
(interactive "^p\np")
|
||
(or arg (setq arg 1))
|
||
(if (called-interactively-p 'interactive)
|
||
(condition-case err
|
||
(line-move (- arg) nil nil try-vscroll)
|
||
((beginning-of-buffer end-of-buffer)
|
||
(signal (car err) (cdr err))))
|
||
(line-move (- arg) nil nil try-vscroll))
|
||
nil)
|
||
|
||
(defcustom track-eol nil
|
||
"Non-nil means vertical motion starting at end of line keeps to ends of lines.
|
||
This means moving to the end of each line moved onto.
|
||
The beginning of a blank line does not count as the end of a line.
|
||
This has no effect when the variable `line-move-visual' is non-nil."
|
||
:type 'boolean
|
||
:group 'editing-basics)
|
||
|
||
(defcustom goal-column nil
|
||
"Semipermanent goal column for vertical motion, as set by \\[set-goal-column], or nil.
|
||
A non-nil setting overrides the variable `line-move-visual', which see."
|
||
:type '(choice integer
|
||
(const :tag "None" nil))
|
||
:group 'editing-basics)
|
||
(make-variable-buffer-local 'goal-column)
|
||
|
||
(defvar temporary-goal-column 0
|
||
"Current goal column for vertical motion.
|
||
It is the column where point was at the start of the current run
|
||
of vertical motion commands.
|
||
|
||
When moving by visual lines via the function `line-move-visual', it is a cons
|
||
cell (COL . HSCROLL), where COL is the x-position, in pixels,
|
||
divided by the default column width, and HSCROLL is the number of
|
||
columns by which window is scrolled from left margin.
|
||
|
||
When the `track-eol' feature is doing its job, the value is
|
||
`most-positive-fixnum'.")
|
||
|
||
(defcustom line-move-ignore-invisible t
|
||
"Non-nil means commands that move by lines ignore invisible newlines.
|
||
When this option is non-nil, \\[next-line], \\[previous-line], \\[move-end-of-line], and \\[move-beginning-of-line] behave
|
||
as if newlines that are invisible didn't exist, and count
|
||
only visible newlines. Thus, moving across across 2 newlines
|
||
one of which is invisible will be counted as a one-line move.
|
||
Also, a non-nil value causes invisible text to be ignored when
|
||
counting columns for the purposes of keeping point in the same
|
||
column by \\[next-line] and \\[previous-line].
|
||
|
||
Outline mode sets this."
|
||
:type 'boolean
|
||
:group 'editing-basics)
|
||
|
||
(defcustom line-move-visual t
|
||
"When non-nil, `line-move' moves point by visual lines.
|
||
This movement is based on where the cursor is displayed on the
|
||
screen, instead of relying on buffer contents alone. It takes
|
||
into account variable-width characters and line continuation.
|
||
If nil, `line-move' moves point by logical lines.
|
||
A non-nil setting of `goal-column' overrides the value of this variable
|
||
and forces movement by logical lines.
|
||
A window that is horizontally scrolled also forces movement by logical
|
||
lines."
|
||
:type 'boolean
|
||
:group 'editing-basics
|
||
:version "23.1")
|
||
|
||
;; Only used if display-graphic-p.
|
||
(declare-function font-info "font.c" (name &optional frame))
|
||
|
||
(defun default-font-height ()
|
||
"Return the height in pixels of the current buffer's default face font.
|
||
|
||
If the default font is remapped (see `face-remapping-alist'), the
|
||
function returns the height of the remapped face."
|
||
(let ((default-font (face-font 'default)))
|
||
(cond
|
||
((and (display-multi-font-p)
|
||
;; Avoid calling font-info if the frame's default font was
|
||
;; not changed since the frame was created. That's because
|
||
;; font-info is expensive for some fonts, see bug #14838.
|
||
(not (string= (frame-parameter nil 'font) default-font)))
|
||
(aref (font-info default-font) 3))
|
||
(t (frame-char-height)))))
|
||
|
||
(defun default-font-width ()
|
||
"Return the width in pixels of the current buffer's default face font.
|
||
|
||
If the default font is remapped (see `face-remapping-alist'), the
|
||
function returns the width of the remapped face."
|
||
(let ((default-font (face-font 'default)))
|
||
(cond
|
||
((and (display-multi-font-p)
|
||
;; Avoid calling font-info if the frame's default font was
|
||
;; not changed since the frame was created. That's because
|
||
;; font-info is expensive for some fonts, see bug #14838.
|
||
(not (string= (frame-parameter nil 'font) default-font)))
|
||
(let* ((info (font-info (face-font 'default)))
|
||
(width (aref info 11)))
|
||
(if (> width 0)
|
||
width
|
||
(aref info 10))))
|
||
(t (frame-char-width)))))
|
||
|
||
(defun default-line-height ()
|
||
"Return the pixel height of current buffer's default-face text line.
|
||
|
||
The value includes `line-spacing', if any, defined for the buffer
|
||
or the frame."
|
||
(let ((dfh (default-font-height))
|
||
(lsp (if (display-graphic-p)
|
||
(or line-spacing
|
||
(default-value 'line-spacing)
|
||
(frame-parameter nil 'line-spacing)
|
||
0)
|
||
0)))
|
||
(if (floatp lsp)
|
||
(setq lsp (truncate (* (frame-char-height) lsp))))
|
||
(+ dfh lsp)))
|
||
|
||
(defun window-screen-lines ()
|
||
"Return the number of screen lines in the text area of the selected window.
|
||
|
||
This is different from `window-text-height' in that this function counts
|
||
lines in units of the height of the font used by the default face displayed
|
||
in the window, not in units of the frame's default font, and also accounts
|
||
for `line-spacing', if any, defined for the window's buffer or frame.
|
||
|
||
The value is a floating-point number."
|
||
(let ((edges (window-inside-pixel-edges))
|
||
(dlh (default-line-height)))
|
||
(/ (float (- (nth 3 edges) (nth 1 edges))) dlh)))
|
||
|
||
;; Returns non-nil if partial move was done.
|
||
(defun line-move-partial (arg noerror to-end)
|
||
(if (< arg 0)
|
||
;; Move backward (up).
|
||
;; If already vscrolled, reduce vscroll
|
||
(let ((vs (window-vscroll nil t))
|
||
(dlh (default-line-height)))
|
||
(when (> vs dlh)
|
||
(set-window-vscroll nil (- vs dlh) t)))
|
||
|
||
;; Move forward (down).
|
||
(let* ((lh (window-line-height -1))
|
||
(rowh (car lh))
|
||
(vpos (nth 1 lh))
|
||
(ypos (nth 2 lh))
|
||
(rbot (nth 3 lh))
|
||
(this-lh (window-line-height))
|
||
(this-height (car this-lh))
|
||
(this-ypos (nth 2 this-lh))
|
||
(dlh (default-line-height))
|
||
(wslines (window-screen-lines))
|
||
(edges (window-inside-pixel-edges))
|
||
(winh (- (nth 3 edges) (nth 1 edges) 1))
|
||
py vs last-line)
|
||
(if (> (mod wslines 1.0) 0.0)
|
||
(setq wslines (round (+ wslines 0.5))))
|
||
(when (or (null lh)
|
||
(>= rbot dlh)
|
||
(<= ypos (- dlh))
|
||
(null this-lh)
|
||
(<= this-ypos (- dlh)))
|
||
(unless lh
|
||
(let ((wend (pos-visible-in-window-p t nil t)))
|
||
(setq rbot (nth 3 wend)
|
||
rowh (nth 4 wend)
|
||
vpos (nth 5 wend))))
|
||
(unless this-lh
|
||
(let ((wstart (pos-visible-in-window-p nil nil t)))
|
||
(setq this-ypos (nth 2 wstart)
|
||
this-height (nth 4 wstart))))
|
||
(setq py
|
||
(or (nth 1 this-lh)
|
||
(let ((ppos (posn-at-point))
|
||
col-row)
|
||
(setq col-row (posn-actual-col-row ppos))
|
||
(if col-row
|
||
(- (cdr col-row) (window-vscroll))
|
||
(cdr (posn-col-row ppos))))))
|
||
;; VPOS > 0 means the last line is only partially visible.
|
||
;; But if the part that is visible is at least as tall as the
|
||
;; default font, that means the line is actually fully
|
||
;; readable, and something like line-spacing is hidden. So in
|
||
;; that case we accept the last line in the window as still
|
||
;; visible, and consider the margin as starting one line
|
||
;; later.
|
||
(if (and vpos (> vpos 0))
|
||
(if (and rowh
|
||
(>= rowh (default-font-height))
|
||
(< rowh dlh))
|
||
(setq last-line (min (- wslines scroll-margin) vpos))
|
||
(setq last-line (min (- wslines scroll-margin 1) (1- vpos)))))
|
||
(cond
|
||
;; If last line of window is fully visible, and vscrolling
|
||
;; more would make this line invisible, move forward.
|
||
((and (or (< (setq vs (window-vscroll nil t)) dlh)
|
||
(null this-height)
|
||
(<= this-height dlh))
|
||
(or (null rbot) (= rbot 0)))
|
||
nil)
|
||
;; If cursor is not in the bottom scroll margin, and the
|
||
;; current line is is not too tall, move forward.
|
||
((and (or (null this-height) (<= this-height winh))
|
||
vpos
|
||
(> vpos 0)
|
||
(< py last-line))
|
||
nil)
|
||
;; When already vscrolled, we vscroll some more if we can,
|
||
;; or clear vscroll and move forward at end of tall image.
|
||
((> vs 0)
|
||
(when (or (and rbot (> rbot 0))
|
||
(and this-height (> this-height dlh)))
|
||
(set-window-vscroll nil (+ vs dlh) t)))
|
||
;; If cursor just entered the bottom scroll margin, move forward,
|
||
;; but also optionally vscroll one line so redisplay won't recenter.
|
||
((and vpos
|
||
(> vpos 0)
|
||
(= py last-line))
|
||
;; Don't vscroll if the partially-visible line at window
|
||
;; bottom is not too tall (a.k.a. "just one more text
|
||
;; line"): in that case, we do want redisplay to behave
|
||
;; normally, i.e. recenter or whatever.
|
||
;;
|
||
;; Note: ROWH + RBOT from the value returned by
|
||
;; pos-visible-in-window-p give the total height of the
|
||
;; partially-visible glyph row at the end of the window. As
|
||
;; we are dealing with floats, we disregard sub-pixel
|
||
;; discrepancies between that and DLH.
|
||
(if (and rowh rbot (>= (- (+ rowh rbot) winh) 1))
|
||
(set-window-vscroll nil dlh t))
|
||
(line-move-1 arg noerror to-end)
|
||
t)
|
||
;; If there are lines above the last line, scroll-up one line.
|
||
((and vpos (> vpos 0))
|
||
(scroll-up 1)
|
||
t)
|
||
;; Finally, start vscroll.
|
||
(t
|
||
(set-window-vscroll nil dlh t)))))))
|
||
|
||
|
||
;; This is like line-move-1 except that it also performs
|
||
;; vertical scrolling of tall images if appropriate.
|
||
;; That is not really a clean thing to do, since it mixes
|
||
;; scrolling with cursor motion. But so far we don't have
|
||
;; a cleaner solution to the problem of making C-n do something
|
||
;; useful given a tall image.
|
||
(defun line-move (arg &optional noerror to-end try-vscroll)
|
||
"Move forward ARG lines.
|
||
If NOERROR, don't signal an error if we can't move ARG lines.
|
||
TO-END is unused.
|
||
TRY-VSCROLL controls whether to vscroll tall lines: if either
|
||
`auto-window-vscroll' or TRY-VSCROLL is nil, this function will
|
||
not vscroll."
|
||
(if noninteractive
|
||
(line-move-1 arg noerror to-end)
|
||
(unless (and auto-window-vscroll try-vscroll
|
||
;; Only vscroll for single line moves
|
||
(= (abs arg) 1)
|
||
;; Under scroll-conservatively, the display engine
|
||
;; does this better.
|
||
(zerop scroll-conservatively)
|
||
;; But don't vscroll in a keyboard macro.
|
||
(not defining-kbd-macro)
|
||
(not executing-kbd-macro)
|
||
(line-move-partial arg noerror to-end))
|
||
(set-window-vscroll nil 0 t)
|
||
(if (and line-move-visual
|
||
;; Display-based column are incompatible with goal-column.
|
||
(not goal-column)
|
||
;; When the text in the window is scrolled to the left,
|
||
;; display-based motion doesn't make sense (because each
|
||
;; logical line occupies exactly one screen line).
|
||
(not (> (window-hscroll) 0))
|
||
;; Likewise when the text _was_ scrolled to the left
|
||
;; when the current run of vertical motion commands
|
||
;; started.
|
||
(not (and (memq last-command
|
||
`(next-line previous-line ,this-command))
|
||
auto-hscroll-mode
|
||
(numberp temporary-goal-column)
|
||
(>= temporary-goal-column
|
||
(- (window-width) hscroll-margin)))))
|
||
(prog1 (line-move-visual arg noerror)
|
||
;; If we moved into a tall line, set vscroll to make
|
||
;; scrolling through tall images more smooth.
|
||
(let ((lh (line-pixel-height))
|
||
(edges (window-inside-pixel-edges))
|
||
(dlh (default-line-height))
|
||
winh)
|
||
(setq winh (- (nth 3 edges) (nth 1 edges) 1))
|
||
(if (and (< arg 0)
|
||
(< (point) (window-start))
|
||
(> lh winh))
|
||
(set-window-vscroll
|
||
nil
|
||
(- lh dlh) t))))
|
||
(line-move-1 arg noerror to-end)))))
|
||
|
||
;; Display-based alternative to line-move-1.
|
||
;; Arg says how many lines to move. The value is t if we can move the
|
||
;; specified number of lines.
|
||
(defun line-move-visual (arg &optional noerror)
|
||
"Move ARG lines forward.
|
||
If NOERROR, don't signal an error if we can't move that many lines."
|
||
(let ((opoint (point))
|
||
(hscroll (window-hscroll))
|
||
target-hscroll)
|
||
;; Check if the previous command was a line-motion command, or if
|
||
;; we were called from some other command.
|
||
(if (and (consp temporary-goal-column)
|
||
(memq last-command `(next-line previous-line ,this-command)))
|
||
;; If so, there's no need to reset `temporary-goal-column',
|
||
;; but we may need to hscroll.
|
||
(if (or (/= (cdr temporary-goal-column) hscroll)
|
||
(> (cdr temporary-goal-column) 0))
|
||
(setq target-hscroll (cdr temporary-goal-column)))
|
||
;; Otherwise, we should reset `temporary-goal-column'.
|
||
(let ((posn (posn-at-point))
|
||
x-pos)
|
||
(cond
|
||
;; Handle the `overflow-newline-into-fringe' case:
|
||
((eq (nth 1 posn) 'right-fringe)
|
||
(setq temporary-goal-column (cons (- (window-width) 1) hscroll)))
|
||
((car (posn-x-y posn))
|
||
(setq x-pos (car (posn-x-y posn)))
|
||
;; In R2L lines, the X pixel coordinate is measured from the
|
||
;; left edge of the window, but columns are still counted
|
||
;; from the logical-order beginning of the line, i.e. from
|
||
;; the right edge in this case. We need to adjust for that.
|
||
(if (eq (current-bidi-paragraph-direction) 'right-to-left)
|
||
(setq x-pos (- (window-body-width nil t) 1 x-pos)))
|
||
(setq temporary-goal-column
|
||
(cons (/ (float x-pos)
|
||
(frame-char-width))
|
||
hscroll))))))
|
||
(if target-hscroll
|
||
(set-window-hscroll (selected-window) target-hscroll))
|
||
;; vertical-motion can move more than it was asked to if it moves
|
||
;; across display strings with newlines. We don't want to ring
|
||
;; the bell and announce beginning/end of buffer in that case.
|
||
(or (and (or (and (>= arg 0)
|
||
(>= (vertical-motion
|
||
(cons (or goal-column
|
||
(if (consp temporary-goal-column)
|
||
(car temporary-goal-column)
|
||
temporary-goal-column))
|
||
arg))
|
||
arg))
|
||
(and (< arg 0)
|
||
(<= (vertical-motion
|
||
(cons (or goal-column
|
||
(if (consp temporary-goal-column)
|
||
(car temporary-goal-column)
|
||
temporary-goal-column))
|
||
arg))
|
||
arg)))
|
||
(or (>= arg 0)
|
||
(/= (point) opoint)
|
||
;; If the goal column lies on a display string,
|
||
;; `vertical-motion' advances the cursor to the end
|
||
;; of the string. For arg < 0, this can cause the
|
||
;; cursor to get stuck. (Bug#3020).
|
||
(= (vertical-motion arg) arg)))
|
||
(unless noerror
|
||
(signal (if (< arg 0) 'beginning-of-buffer 'end-of-buffer)
|
||
nil)))))
|
||
|
||
;; This is the guts of next-line and previous-line.
|
||
;; Arg says how many lines to move.
|
||
;; The value is t if we can move the specified number of lines.
|
||
(defun line-move-1 (arg &optional noerror _to-end)
|
||
;; Don't run any point-motion hooks, and disregard intangibility,
|
||
;; for intermediate positions.
|
||
(let ((inhibit-point-motion-hooks t)
|
||
(opoint (point))
|
||
(orig-arg arg))
|
||
(if (consp temporary-goal-column)
|
||
(setq temporary-goal-column (+ (car temporary-goal-column)
|
||
(cdr temporary-goal-column))))
|
||
(unwind-protect
|
||
(progn
|
||
(if (not (memq last-command '(next-line previous-line)))
|
||
(setq temporary-goal-column
|
||
(if (and track-eol (eolp)
|
||
;; Don't count beg of empty line as end of line
|
||
;; unless we just did explicit end-of-line.
|
||
(or (not (bolp)) (eq last-command 'move-end-of-line)))
|
||
most-positive-fixnum
|
||
(current-column))))
|
||
|
||
(if (not (or (integerp selective-display)
|
||
line-move-ignore-invisible))
|
||
;; Use just newline characters.
|
||
;; Set ARG to 0 if we move as many lines as requested.
|
||
(or (if (> arg 0)
|
||
(progn (if (> arg 1) (forward-line (1- arg)))
|
||
;; This way of moving forward ARG lines
|
||
;; verifies that we have a newline after the last one.
|
||
;; It doesn't get confused by intangible text.
|
||
(end-of-line)
|
||
(if (zerop (forward-line 1))
|
||
(setq arg 0)))
|
||
(and (zerop (forward-line arg))
|
||
(bolp)
|
||
(setq arg 0)))
|
||
(unless noerror
|
||
(signal (if (< arg 0)
|
||
'beginning-of-buffer
|
||
'end-of-buffer)
|
||
nil)))
|
||
;; Move by arg lines, but ignore invisible ones.
|
||
(let (done)
|
||
(while (and (> arg 0) (not done))
|
||
;; If the following character is currently invisible,
|
||
;; skip all characters with that same `invisible' property value.
|
||
(while (and (not (eobp)) (invisible-p (point)))
|
||
(goto-char (next-char-property-change (point))))
|
||
;; Move a line.
|
||
;; We don't use `end-of-line', since we want to escape
|
||
;; from field boundaries occurring exactly at point.
|
||
(goto-char (constrain-to-field
|
||
(let ((inhibit-field-text-motion t))
|
||
(line-end-position))
|
||
(point) t t
|
||
'inhibit-line-move-field-capture))
|
||
;; If there's no invisibility here, move over the newline.
|
||
(cond
|
||
((eobp)
|
||
(if (not noerror)
|
||
(signal 'end-of-buffer nil)
|
||
(setq done t)))
|
||
((and (> arg 1) ;; Use vertical-motion for last move
|
||
(not (integerp selective-display))
|
||
(not (invisible-p (point))))
|
||
;; We avoid vertical-motion when possible
|
||
;; because that has to fontify.
|
||
(forward-line 1))
|
||
;; Otherwise move a more sophisticated way.
|
||
((zerop (vertical-motion 1))
|
||
(if (not noerror)
|
||
(signal 'end-of-buffer nil)
|
||
(setq done t))))
|
||
(unless done
|
||
(setq arg (1- arg))))
|
||
;; The logic of this is the same as the loop above,
|
||
;; it just goes in the other direction.
|
||
(while (and (< arg 0) (not done))
|
||
;; For completely consistency with the forward-motion
|
||
;; case, we should call beginning-of-line here.
|
||
;; However, if point is inside a field and on a
|
||
;; continued line, the call to (vertical-motion -1)
|
||
;; below won't move us back far enough; then we return
|
||
;; to the same column in line-move-finish, and point
|
||
;; gets stuck -- cyd
|
||
(forward-line 0)
|
||
(cond
|
||
((bobp)
|
||
(if (not noerror)
|
||
(signal 'beginning-of-buffer nil)
|
||
(setq done t)))
|
||
((and (< arg -1) ;; Use vertical-motion for last move
|
||
(not (integerp selective-display))
|
||
(not (invisible-p (1- (point)))))
|
||
(forward-line -1))
|
||
((zerop (vertical-motion -1))
|
||
(if (not noerror)
|
||
(signal 'beginning-of-buffer nil)
|
||
(setq done t))))
|
||
(unless done
|
||
(setq arg (1+ arg))
|
||
(while (and ;; Don't move over previous invis lines
|
||
;; if our target is the middle of this line.
|
||
(or (zerop (or goal-column temporary-goal-column))
|
||
(< arg 0))
|
||
(not (bobp)) (invisible-p (1- (point))))
|
||
(goto-char (previous-char-property-change (point))))))))
|
||
;; This is the value the function returns.
|
||
(= arg 0))
|
||
|
||
(cond ((> arg 0)
|
||
;; If we did not move down as far as desired, at least go
|
||
;; to end of line. Be sure to call point-entered and
|
||
;; point-left-hooks.
|
||
(let* ((npoint (prog1 (line-end-position)
|
||
(goto-char opoint)))
|
||
(inhibit-point-motion-hooks nil))
|
||
(goto-char npoint)))
|
||
((< arg 0)
|
||
;; If we did not move up as far as desired,
|
||
;; at least go to beginning of line.
|
||
(let* ((npoint (prog1 (line-beginning-position)
|
||
(goto-char opoint)))
|
||
(inhibit-point-motion-hooks nil))
|
||
(goto-char npoint)))
|
||
(t
|
||
(line-move-finish (or goal-column temporary-goal-column)
|
||
opoint (> orig-arg 0)))))))
|
||
|
||
(defun line-move-finish (column opoint forward)
|
||
(let ((repeat t))
|
||
(while repeat
|
||
;; Set REPEAT to t to repeat the whole thing.
|
||
(setq repeat nil)
|
||
|
||
(let (new
|
||
(old (point))
|
||
(line-beg (line-beginning-position))
|
||
(line-end
|
||
;; Compute the end of the line
|
||
;; ignoring effectively invisible newlines.
|
||
(save-excursion
|
||
;; Like end-of-line but ignores fields.
|
||
(skip-chars-forward "^\n")
|
||
(while (and (not (eobp)) (invisible-p (point)))
|
||
(goto-char (next-char-property-change (point)))
|
||
(skip-chars-forward "^\n"))
|
||
(point))))
|
||
|
||
;; Move to the desired column.
|
||
(line-move-to-column (truncate column))
|
||
|
||
;; Corner case: suppose we start out in a field boundary in
|
||
;; the middle of a continued line. When we get to
|
||
;; line-move-finish, point is at the start of a new *screen*
|
||
;; line but the same text line; then line-move-to-column would
|
||
;; move us backwards. Test using C-n with point on the "x" in
|
||
;; (insert "a" (propertize "x" 'field t) (make-string 89 ?y))
|
||
(and forward
|
||
(< (point) old)
|
||
(goto-char old))
|
||
|
||
(setq new (point))
|
||
|
||
;; Process intangibility within a line.
|
||
;; With inhibit-point-motion-hooks bound to nil, a call to
|
||
;; goto-char moves point past intangible text.
|
||
|
||
;; However, inhibit-point-motion-hooks controls both the
|
||
;; intangibility and the point-entered/point-left hooks. The
|
||
;; following hack avoids calling the point-* hooks
|
||
;; unnecessarily. Note that we move *forward* past intangible
|
||
;; text when the initial and final points are the same.
|
||
(goto-char new)
|
||
(let ((inhibit-point-motion-hooks nil))
|
||
(goto-char new)
|
||
|
||
;; If intangibility moves us to a different (later) place
|
||
;; in the same line, use that as the destination.
|
||
(if (<= (point) line-end)
|
||
(setq new (point))
|
||
;; If that position is "too late",
|
||
;; try the previous allowable position.
|
||
;; See if it is ok.
|
||
(backward-char)
|
||
(if (if forward
|
||
;; If going forward, don't accept the previous
|
||
;; allowable position if it is before the target line.
|
||
(< line-beg (point))
|
||
;; If going backward, don't accept the previous
|
||
;; allowable position if it is still after the target line.
|
||
(<= (point) line-end))
|
||
(setq new (point))
|
||
;; As a last resort, use the end of the line.
|
||
(setq new line-end))))
|
||
|
||
;; Now move to the updated destination, processing fields
|
||
;; as well as intangibility.
|
||
(goto-char opoint)
|
||
(let ((inhibit-point-motion-hooks nil))
|
||
(goto-char
|
||
;; Ignore field boundaries if the initial and final
|
||
;; positions have the same `field' property, even if the
|
||
;; fields are non-contiguous. This seems to be "nicer"
|
||
;; behavior in many situations.
|
||
(if (eq (get-char-property new 'field)
|
||
(get-char-property opoint 'field))
|
||
new
|
||
(constrain-to-field new opoint t t
|
||
'inhibit-line-move-field-capture))))
|
||
|
||
;; If all this moved us to a different line,
|
||
;; retry everything within that new line.
|
||
(when (or (< (point) line-beg) (> (point) line-end))
|
||
;; Repeat the intangibility and field processing.
|
||
(setq repeat t))))))
|
||
|
||
(defun line-move-to-column (col)
|
||
"Try to find column COL, considering invisibility.
|
||
This function works only in certain cases,
|
||
because what we really need is for `move-to-column'
|
||
and `current-column' to be able to ignore invisible text."
|
||
(if (zerop col)
|
||
(beginning-of-line)
|
||
(move-to-column col))
|
||
|
||
(when (and line-move-ignore-invisible
|
||
(not (bolp)) (invisible-p (1- (point))))
|
||
(let ((normal-location (point))
|
||
(normal-column (current-column)))
|
||
;; If the following character is currently invisible,
|
||
;; skip all characters with that same `invisible' property value.
|
||
(while (and (not (eobp))
|
||
(invisible-p (point)))
|
||
(goto-char (next-char-property-change (point))))
|
||
;; Have we advanced to a larger column position?
|
||
(if (> (current-column) normal-column)
|
||
;; We have made some progress towards the desired column.
|
||
;; See if we can make any further progress.
|
||
(line-move-to-column (+ (current-column) (- col normal-column)))
|
||
;; Otherwise, go to the place we originally found
|
||
;; and move back over invisible text.
|
||
;; that will get us to the same place on the screen
|
||
;; but with a more reasonable buffer position.
|
||
(goto-char normal-location)
|
||
(let ((line-beg
|
||
;; We want the real line beginning, so it's consistent
|
||
;; with bolp below, otherwise we might infloop.
|
||
(let ((inhibit-field-text-motion t))
|
||
(line-beginning-position))))
|
||
(while (and (not (bolp)) (invisible-p (1- (point))))
|
||
(goto-char (previous-char-property-change (point) line-beg))))))))
|
||
|
||
(defun move-end-of-line (arg)
|
||
"Move point to end of current line as displayed.
|
||
With argument ARG not nil or 1, move forward ARG - 1 lines first.
|
||
If point reaches the beginning or end of buffer, it stops there.
|
||
|
||
To ignore the effects of the `intangible' text or overlay
|
||
property, bind `inhibit-point-motion-hooks' to t.
|
||
If there is an image in the current line, this function
|
||
disregards newlines that are part of the text on which the image
|
||
rests."
|
||
(interactive "^p")
|
||
(or arg (setq arg 1))
|
||
(let (done)
|
||
(while (not done)
|
||
(let ((newpos
|
||
(save-excursion
|
||
(let ((goal-column 0)
|
||
(line-move-visual nil))
|
||
(and (line-move arg t)
|
||
;; With bidi reordering, we may not be at bol,
|
||
;; so make sure we are.
|
||
(skip-chars-backward "^\n")
|
||
(not (bobp))
|
||
(progn
|
||
(while (and (not (bobp)) (invisible-p (1- (point))))
|
||
(goto-char (previous-single-char-property-change
|
||
(point) 'invisible)))
|
||
(backward-char 1)))
|
||
(point)))))
|
||
(goto-char newpos)
|
||
(if (and (> (point) newpos)
|
||
(eq (preceding-char) ?\n))
|
||
(backward-char 1)
|
||
(if (and (> (point) newpos) (not (eobp))
|
||
(not (eq (following-char) ?\n)))
|
||
;; If we skipped something intangible and now we're not
|
||
;; really at eol, keep going.
|
||
(setq arg 1)
|
||
(setq done t)))))))
|
||
|
||
(defun move-beginning-of-line (arg)
|
||
"Move point to beginning of current line as displayed.
|
||
\(If there's an image in the line, this disregards newlines
|
||
which are part of the text that the image rests on.)
|
||
|
||
With argument ARG not nil or 1, move forward ARG - 1 lines first.
|
||
If point reaches the beginning or end of buffer, it stops there.
|
||
To ignore intangibility, bind `inhibit-point-motion-hooks' to t."
|
||
(interactive "^p")
|
||
(or arg (setq arg 1))
|
||
|
||
(let ((orig (point))
|
||
first-vis first-vis-field-value)
|
||
|
||
;; Move by lines, if ARG is not 1 (the default).
|
||
(if (/= arg 1)
|
||
(let ((line-move-visual nil))
|
||
(line-move (1- arg) t)))
|
||
|
||
;; Move to beginning-of-line, ignoring fields and invisible text.
|
||
(skip-chars-backward "^\n")
|
||
(while (and (not (bobp)) (invisible-p (1- (point))))
|
||
(goto-char (previous-char-property-change (point)))
|
||
(skip-chars-backward "^\n"))
|
||
|
||
;; Now find first visible char in the line.
|
||
(while (and (< (point) orig) (invisible-p (point)))
|
||
(goto-char (next-char-property-change (point) orig)))
|
||
(setq first-vis (point))
|
||
|
||
;; See if fields would stop us from reaching FIRST-VIS.
|
||
(setq first-vis-field-value
|
||
(constrain-to-field first-vis orig (/= arg 1) t nil))
|
||
|
||
(goto-char (if (/= first-vis-field-value first-vis)
|
||
;; If yes, obey them.
|
||
first-vis-field-value
|
||
;; Otherwise, move to START with attention to fields.
|
||
;; (It is possible that fields never matter in this case.)
|
||
(constrain-to-field (point) orig
|
||
(/= arg 1) t nil)))))
|
||
|
||
|
||
;; Many people have said they rarely use this feature, and often type
|
||
;; it by accident. Maybe it shouldn't even be on a key.
|
||
(put 'set-goal-column 'disabled t)
|
||
|
||
(defun set-goal-column (arg)
|
||
"Set the current horizontal position as a goal for \\[next-line] and \\[previous-line].
|
||
Those commands will move to this position in the line moved to
|
||
rather than trying to keep the same horizontal position.
|
||
With a non-nil argument ARG, clears out the goal column
|
||
so that \\[next-line] and \\[previous-line] resume vertical motion.
|
||
The goal column is stored in the variable `goal-column'."
|
||
(interactive "P")
|
||
(if arg
|
||
(progn
|
||
(setq goal-column nil)
|
||
(message "No goal column"))
|
||
(setq goal-column (current-column))
|
||
;; The older method below can be erroneous if `set-goal-column' is bound
|
||
;; to a sequence containing %
|
||
;;(message (substitute-command-keys
|
||
;;"Goal column %d (use \\[set-goal-column] with an arg to unset it)")
|
||
;;goal-column)
|
||
(message "%s"
|
||
(concat
|
||
(format "Goal column %d " goal-column)
|
||
(substitute-command-keys
|
||
"(use \\[set-goal-column] with an arg to unset it)")))
|
||
|
||
)
|
||
nil)
|
||
|
||
;;; Editing based on visual lines, as opposed to logical lines.
|
||
|
||
(defun end-of-visual-line (&optional n)
|
||
"Move point to end of current visual line.
|
||
With argument N not nil or 1, move forward N - 1 visual lines first.
|
||
If point reaches the beginning or end of buffer, it stops there.
|
||
To ignore intangibility, bind `inhibit-point-motion-hooks' to t."
|
||
(interactive "^p")
|
||
(or n (setq n 1))
|
||
(if (/= n 1)
|
||
(let ((line-move-visual t))
|
||
(line-move (1- n) t)))
|
||
;; Unlike `move-beginning-of-line', `move-end-of-line' doesn't
|
||
;; constrain to field boundaries, so we don't either.
|
||
(vertical-motion (cons (window-width) 0)))
|
||
|
||
(defun beginning-of-visual-line (&optional n)
|
||
"Move point to beginning of current visual line.
|
||
With argument N not nil or 1, move forward N - 1 visual lines first.
|
||
If point reaches the beginning or end of buffer, it stops there.
|
||
To ignore intangibility, bind `inhibit-point-motion-hooks' to t."
|
||
(interactive "^p")
|
||
(or n (setq n 1))
|
||
(let ((opoint (point)))
|
||
(if (/= n 1)
|
||
(let ((line-move-visual t))
|
||
(line-move (1- n) t)))
|
||
(vertical-motion 0)
|
||
;; Constrain to field boundaries, like `move-beginning-of-line'.
|
||
(goto-char (constrain-to-field (point) opoint (/= n 1)))))
|
||
|
||
(defun kill-visual-line (&optional arg)
|
||
"Kill the rest of the visual line.
|
||
With prefix argument ARG, kill that many visual lines from point.
|
||
If ARG is negative, kill visual lines backward.
|
||
If ARG is zero, kill the text before point on the current visual
|
||
line.
|
||
|
||
If you want to append the killed line to the last killed text,
|
||
use \\[append-next-kill] before \\[kill-line].
|
||
|
||
If the buffer is read-only, Emacs will beep and refrain from deleting
|
||
the line, but put the line in the kill ring anyway. This means that
|
||
you can use this command to copy text from a read-only buffer.
|
||
\(If the variable `kill-read-only-ok' is non-nil, then this won't
|
||
even beep.)"
|
||
(interactive "P")
|
||
;; Like in `kill-line', it's better to move point to the other end
|
||
;; of the kill before killing.
|
||
(let ((opoint (point))
|
||
(kill-whole-line (and kill-whole-line (bolp))))
|
||
(if arg
|
||
(vertical-motion (prefix-numeric-value arg))
|
||
(end-of-visual-line 1)
|
||
(if (= (point) opoint)
|
||
(vertical-motion 1)
|
||
;; Skip any trailing whitespace at the end of the visual line.
|
||
;; We used to do this only if `show-trailing-whitespace' is
|
||
;; nil, but that's wrong; the correct thing would be to check
|
||
;; whether the trailing whitespace is highlighted. But, it's
|
||
;; OK to just do this unconditionally.
|
||
(skip-chars-forward " \t")))
|
||
(kill-region opoint (if (and kill-whole-line (looking-at "\n"))
|
||
(1+ (point))
|
||
(point)))))
|
||
|
||
(defun next-logical-line (&optional arg try-vscroll)
|
||
"Move cursor vertically down ARG lines.
|
||
This is identical to `next-line', except that it always moves
|
||
by logical lines instead of visual lines, ignoring the value of
|
||
the variable `line-move-visual'."
|
||
(interactive "^p\np")
|
||
(let ((line-move-visual nil))
|
||
(with-no-warnings
|
||
(next-line arg try-vscroll))))
|
||
|
||
(defun previous-logical-line (&optional arg try-vscroll)
|
||
"Move cursor vertically up ARG lines.
|
||
This is identical to `previous-line', except that it always moves
|
||
by logical lines instead of visual lines, ignoring the value of
|
||
the variable `line-move-visual'."
|
||
(interactive "^p\np")
|
||
(let ((line-move-visual nil))
|
||
(with-no-warnings
|
||
(previous-line arg try-vscroll))))
|
||
|
||
(defgroup visual-line nil
|
||
"Editing based on visual lines."
|
||
:group 'convenience
|
||
:version "23.1")
|
||
|
||
(defvar visual-line-mode-map
|
||
(let ((map (make-sparse-keymap)))
|
||
(define-key map [remap kill-line] 'kill-visual-line)
|
||
(define-key map [remap move-beginning-of-line] 'beginning-of-visual-line)
|
||
(define-key map [remap move-end-of-line] 'end-of-visual-line)
|
||
;; These keybindings interfere with xterm function keys. Are
|
||
;; there any other suitable bindings?
|
||
;; (define-key map "\M-[" 'previous-logical-line)
|
||
;; (define-key map "\M-]" 'next-logical-line)
|
||
map))
|
||
|
||
(defcustom visual-line-fringe-indicators '(nil nil)
|
||
"How fringe indicators are shown for wrapped lines in `visual-line-mode'.
|
||
The value should be a list of the form (LEFT RIGHT), where LEFT
|
||
and RIGHT are symbols representing the bitmaps to display, to
|
||
indicate wrapped lines, in the left and right fringes respectively.
|
||
See also `fringe-indicator-alist'.
|
||
The default is not to display fringe indicators for wrapped lines.
|
||
This variable does not affect fringe indicators displayed for
|
||
other purposes."
|
||
:type '(list (choice (const :tag "Hide left indicator" nil)
|
||
(const :tag "Left curly arrow" left-curly-arrow)
|
||
(symbol :tag "Other bitmap"))
|
||
(choice (const :tag "Hide right indicator" nil)
|
||
(const :tag "Right curly arrow" right-curly-arrow)
|
||
(symbol :tag "Other bitmap")))
|
||
:set (lambda (symbol value)
|
||
(dolist (buf (buffer-list))
|
||
(with-current-buffer buf
|
||
(when (and (boundp 'visual-line-mode)
|
||
(symbol-value 'visual-line-mode))
|
||
(setq fringe-indicator-alist
|
||
(cons (cons 'continuation value)
|
||
(assq-delete-all
|
||
'continuation
|
||
(copy-tree fringe-indicator-alist)))))))
|
||
(set-default symbol value)))
|
||
|
||
(defvar visual-line--saved-state nil)
|
||
|
||
(define-minor-mode visual-line-mode
|
||
"Toggle visual line based editing (Visual Line mode).
|
||
With a prefix argument ARG, enable Visual Line mode if ARG is
|
||
positive, and disable it otherwise. If called from Lisp, enable
|
||
the mode if ARG is omitted or nil.
|
||
|
||
When Visual Line mode is enabled, `word-wrap' is turned on in
|
||
this buffer, and simple editing commands are redefined to act on
|
||
visual lines, not logical lines. See Info node `Visual Line
|
||
Mode' for details."
|
||
:keymap visual-line-mode-map
|
||
:group 'visual-line
|
||
:lighter " Wrap"
|
||
(if visual-line-mode
|
||
(progn
|
||
(set (make-local-variable 'visual-line--saved-state) nil)
|
||
;; Save the local values of some variables, to be restored if
|
||
;; visual-line-mode is turned off.
|
||
(dolist (var '(line-move-visual truncate-lines
|
||
truncate-partial-width-windows
|
||
word-wrap fringe-indicator-alist))
|
||
(if (local-variable-p var)
|
||
(push (cons var (symbol-value var))
|
||
visual-line--saved-state)))
|
||
(set (make-local-variable 'line-move-visual) t)
|
||
(set (make-local-variable 'truncate-partial-width-windows) nil)
|
||
(setq truncate-lines nil
|
||
word-wrap t
|
||
fringe-indicator-alist
|
||
(cons (cons 'continuation visual-line-fringe-indicators)
|
||
fringe-indicator-alist)))
|
||
(kill-local-variable 'line-move-visual)
|
||
(kill-local-variable 'word-wrap)
|
||
(kill-local-variable 'truncate-lines)
|
||
(kill-local-variable 'truncate-partial-width-windows)
|
||
(kill-local-variable 'fringe-indicator-alist)
|
||
(dolist (saved visual-line--saved-state)
|
||
(set (make-local-variable (car saved)) (cdr saved)))
|
||
(kill-local-variable 'visual-line--saved-state)))
|
||
|
||
(defun turn-on-visual-line-mode ()
|
||
(visual-line-mode 1))
|
||
|
||
(define-globalized-minor-mode global-visual-line-mode
|
||
visual-line-mode turn-on-visual-line-mode)
|
||
|
||
|
||
(defun transpose-chars (arg)
|
||
"Interchange characters around point, moving forward one character.
|
||
With prefix arg ARG, effect is to take character before point
|
||
and drag it forward past ARG other characters (backward if ARG negative).
|
||
If no argument and at end of line, the previous two chars are exchanged."
|
||
(interactive "*P")
|
||
(when (and (null arg) (eolp) (not (bobp))
|
||
(not (get-text-property (1- (point)) 'read-only)))
|
||
(forward-char -1))
|
||
(transpose-subr 'forward-char (prefix-numeric-value arg)))
|
||
|
||
(defun transpose-words (arg)
|
||
"Interchange words around point, leaving point at end of them.
|
||
With prefix arg ARG, effect is to take word before or around point
|
||
and drag it forward past ARG other words (backward if ARG negative).
|
||
If ARG is zero, the words around or after point and around or after mark
|
||
are interchanged."
|
||
;; FIXME: `foo a!nd bar' should transpose into `bar and foo'.
|
||
(interactive "*p")
|
||
(transpose-subr 'forward-word arg))
|
||
|
||
(defun transpose-sexps (arg)
|
||
"Like \\[transpose-words] but applies to sexps.
|
||
Does not work on a sexp that point is in the middle of
|
||
if it is a list or string."
|
||
(interactive "*p")
|
||
(transpose-subr
|
||
(lambda (arg)
|
||
;; Here we should try to simulate the behavior of
|
||
;; (cons (progn (forward-sexp x) (point))
|
||
;; (progn (forward-sexp (- x)) (point)))
|
||
;; Except that we don't want to rely on the second forward-sexp
|
||
;; putting us back to where we want to be, since forward-sexp-function
|
||
;; might do funny things like infix-precedence.
|
||
(if (if (> arg 0)
|
||
(looking-at "\\sw\\|\\s_")
|
||
(and (not (bobp))
|
||
(save-excursion (forward-char -1) (looking-at "\\sw\\|\\s_"))))
|
||
;; Jumping over a symbol. We might be inside it, mind you.
|
||
(progn (funcall (if (> arg 0)
|
||
'skip-syntax-backward 'skip-syntax-forward)
|
||
"w_")
|
||
(cons (save-excursion (forward-sexp arg) (point)) (point)))
|
||
;; Otherwise, we're between sexps. Take a step back before jumping
|
||
;; to make sure we'll obey the same precedence no matter which direction
|
||
;; we're going.
|
||
(funcall (if (> arg 0) 'skip-syntax-backward 'skip-syntax-forward) " .")
|
||
(cons (save-excursion (forward-sexp arg) (point))
|
||
(progn (while (or (forward-comment (if (> arg 0) 1 -1))
|
||
(not (zerop (funcall (if (> arg 0)
|
||
'skip-syntax-forward
|
||
'skip-syntax-backward)
|
||
".")))))
|
||
(point)))))
|
||
arg 'special))
|
||
|
||
(defun transpose-lines (arg)
|
||
"Exchange current line and previous line, leaving point after both.
|
||
With argument ARG, takes previous line and moves it past ARG lines.
|
||
With argument 0, interchanges line point is in with line mark is in."
|
||
(interactive "*p")
|
||
(transpose-subr (function
|
||
(lambda (arg)
|
||
(if (> arg 0)
|
||
(progn
|
||
;; Move forward over ARG lines,
|
||
;; but create newlines if necessary.
|
||
(setq arg (forward-line arg))
|
||
(if (/= (preceding-char) ?\n)
|
||
(setq arg (1+ arg)))
|
||
(if (> arg 0)
|
||
(newline arg)))
|
||
(forward-line arg))))
|
||
arg))
|
||
|
||
;; FIXME seems to leave point BEFORE the current object when ARG = 0,
|
||
;; which seems inconsistent with the ARG /= 0 case.
|
||
;; FIXME document SPECIAL.
|
||
(defun transpose-subr (mover arg &optional special)
|
||
"Subroutine to do the work of transposing objects.
|
||
Works for lines, sentences, paragraphs, etc. MOVER is a function that
|
||
moves forward by units of the given object (e.g. forward-sentence,
|
||
forward-paragraph). If ARG is zero, exchanges the current object
|
||
with the one containing mark. If ARG is an integer, moves the
|
||
current object past ARG following (if ARG is positive) or
|
||
preceding (if ARG is negative) objects, leaving point after the
|
||
current object."
|
||
(let ((aux (if special mover
|
||
(lambda (x)
|
||
(cons (progn (funcall mover x) (point))
|
||
(progn (funcall mover (- x)) (point))))))
|
||
pos1 pos2)
|
||
(cond
|
||
((= arg 0)
|
||
(save-excursion
|
||
(setq pos1 (funcall aux 1))
|
||
(goto-char (or (mark) (error "No mark set in this buffer")))
|
||
(setq pos2 (funcall aux 1))
|
||
(transpose-subr-1 pos1 pos2))
|
||
(exchange-point-and-mark))
|
||
((> arg 0)
|
||
(setq pos1 (funcall aux -1))
|
||
(setq pos2 (funcall aux arg))
|
||
(transpose-subr-1 pos1 pos2)
|
||
(goto-char (car pos2)))
|
||
(t
|
||
(setq pos1 (funcall aux -1))
|
||
(goto-char (car pos1))
|
||
(setq pos2 (funcall aux arg))
|
||
(transpose-subr-1 pos1 pos2)))))
|
||
|
||
(defun transpose-subr-1 (pos1 pos2)
|
||
(when (> (car pos1) (cdr pos1)) (setq pos1 (cons (cdr pos1) (car pos1))))
|
||
(when (> (car pos2) (cdr pos2)) (setq pos2 (cons (cdr pos2) (car pos2))))
|
||
(when (> (car pos1) (car pos2))
|
||
(let ((swap pos1))
|
||
(setq pos1 pos2 pos2 swap)))
|
||
(if (> (cdr pos1) (car pos2)) (error "Don't have two things to transpose"))
|
||
(atomic-change-group
|
||
;; This sequence of insertions attempts to preserve marker
|
||
;; positions at the start and end of the transposed objects.
|
||
(let* ((word (buffer-substring (car pos2) (cdr pos2)))
|
||
(len1 (- (cdr pos1) (car pos1)))
|
||
(len2 (length word))
|
||
(boundary (make-marker)))
|
||
(set-marker boundary (car pos2))
|
||
(goto-char (cdr pos1))
|
||
(insert-before-markers word)
|
||
(setq word (delete-and-extract-region (car pos1) (+ (car pos1) len1)))
|
||
(goto-char boundary)
|
||
(insert word)
|
||
(goto-char (+ boundary len1))
|
||
(delete-region (point) (+ (point) len2))
|
||
(set-marker boundary nil))))
|
||
|
||
(defun backward-word (&optional arg)
|
||
"Move backward until encountering the beginning of a word.
|
||
With argument ARG, do this that many times.
|
||
If ARG is omitted or nil, move point backward one word."
|
||
(interactive "^p")
|
||
(forward-word (- (or arg 1))))
|
||
|
||
(defun mark-word (&optional arg allow-extend)
|
||
"Set mark ARG words away from point.
|
||
The place mark goes is the same place \\[forward-word] would
|
||
move to with the same argument.
|
||
Interactively, if this command is repeated
|
||
or (in Transient Mark mode) if the mark is active,
|
||
it marks the next ARG words after the ones already marked."
|
||
(interactive "P\np")
|
||
(cond ((and allow-extend
|
||
(or (and (eq last-command this-command) (mark t))
|
||
(region-active-p)))
|
||
(setq arg (if arg (prefix-numeric-value arg)
|
||
(if (< (mark) (point)) -1 1)))
|
||
(set-mark
|
||
(save-excursion
|
||
(goto-char (mark))
|
||
(forward-word arg)
|
||
(point))))
|
||
(t
|
||
(push-mark
|
||
(save-excursion
|
||
(forward-word (prefix-numeric-value arg))
|
||
(point))
|
||
nil t))))
|
||
|
||
(defun kill-word (arg)
|
||
"Kill characters forward until encountering the end of a word.
|
||
With argument ARG, do this that many times."
|
||
(interactive "p")
|
||
(kill-region (point) (progn (forward-word arg) (point))))
|
||
|
||
(defun backward-kill-word (arg)
|
||
"Kill characters backward until encountering the beginning of a word.
|
||
With argument ARG, do this that many times."
|
||
(interactive "p")
|
||
(kill-word (- arg)))
|
||
|
||
(defun current-word (&optional strict really-word)
|
||
"Return the symbol or word that point is on (or a nearby one) as a string.
|
||
The return value includes no text properties.
|
||
If optional arg STRICT is non-nil, return nil unless point is within
|
||
or adjacent to a symbol or word. In all cases the value can be nil
|
||
if there is no word nearby.
|
||
The function, belying its name, normally finds a symbol.
|
||
If optional arg REALLY-WORD is non-nil, it finds just a word."
|
||
(save-excursion
|
||
(let* ((oldpoint (point)) (start (point)) (end (point))
|
||
(syntaxes (if really-word "w" "w_"))
|
||
(not-syntaxes (concat "^" syntaxes)))
|
||
(skip-syntax-backward syntaxes) (setq start (point))
|
||
(goto-char oldpoint)
|
||
(skip-syntax-forward syntaxes) (setq end (point))
|
||
(when (and (eq start oldpoint) (eq end oldpoint)
|
||
;; Point is neither within nor adjacent to a word.
|
||
(not strict))
|
||
;; Look for preceding word in same line.
|
||
(skip-syntax-backward not-syntaxes (line-beginning-position))
|
||
(if (bolp)
|
||
;; No preceding word in same line.
|
||
;; Look for following word in same line.
|
||
(progn
|
||
(skip-syntax-forward not-syntaxes (line-end-position))
|
||
(setq start (point))
|
||
(skip-syntax-forward syntaxes)
|
||
(setq end (point)))
|
||
(setq end (point))
|
||
(skip-syntax-backward syntaxes)
|
||
(setq start (point))))
|
||
;; If we found something nonempty, return it as a string.
|
||
(unless (= start end)
|
||
(buffer-substring-no-properties start end)))))
|
||
|
||
(defcustom fill-prefix nil
|
||
"String for filling to insert at front of new line, or nil for none."
|
||
:type '(choice (const :tag "None" nil)
|
||
string)
|
||
:group 'fill)
|
||
(make-variable-buffer-local 'fill-prefix)
|
||
(put 'fill-prefix 'safe-local-variable 'string-or-null-p)
|
||
|
||
(defcustom auto-fill-inhibit-regexp nil
|
||
"Regexp to match lines which should not be auto-filled."
|
||
:type '(choice (const :tag "None" nil)
|
||
regexp)
|
||
:group 'fill)
|
||
|
||
(defun do-auto-fill ()
|
||
"The default value for `normal-auto-fill-function'.
|
||
This is the default auto-fill function, some major modes use a different one.
|
||
Returns t if it really did any work."
|
||
(let (fc justify give-up
|
||
(fill-prefix fill-prefix))
|
||
(if (or (not (setq justify (current-justification)))
|
||
(null (setq fc (current-fill-column)))
|
||
(and (eq justify 'left)
|
||
(<= (current-column) fc))
|
||
(and auto-fill-inhibit-regexp
|
||
(save-excursion (beginning-of-line)
|
||
(looking-at auto-fill-inhibit-regexp))))
|
||
nil ;; Auto-filling not required
|
||
(if (memq justify '(full center right))
|
||
(save-excursion (unjustify-current-line)))
|
||
|
||
;; Choose a fill-prefix automatically.
|
||
(when (and adaptive-fill-mode
|
||
(or (null fill-prefix) (string= fill-prefix "")))
|
||
(let ((prefix
|
||
(fill-context-prefix
|
||
(save-excursion (fill-forward-paragraph -1) (point))
|
||
(save-excursion (fill-forward-paragraph 1) (point)))))
|
||
(and prefix (not (equal prefix ""))
|
||
;; Use auto-indentation rather than a guessed empty prefix.
|
||
(not (and fill-indent-according-to-mode
|
||
(string-match "\\`[ \t]*\\'" prefix)))
|
||
(setq fill-prefix prefix))))
|
||
|
||
(while (and (not give-up) (> (current-column) fc))
|
||
;; Determine where to split the line.
|
||
(let* (after-prefix
|
||
(fill-point
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(setq after-prefix (point))
|
||
(and fill-prefix
|
||
(looking-at (regexp-quote fill-prefix))
|
||
(setq after-prefix (match-end 0)))
|
||
(move-to-column (1+ fc))
|
||
(fill-move-to-break-point after-prefix)
|
||
(point))))
|
||
|
||
;; See whether the place we found is any good.
|
||
(if (save-excursion
|
||
(goto-char fill-point)
|
||
(or (bolp)
|
||
;; There is no use breaking at end of line.
|
||
(save-excursion (skip-chars-forward " ") (eolp))
|
||
;; It is futile to split at the end of the prefix
|
||
;; since we would just insert the prefix again.
|
||
(and after-prefix (<= (point) after-prefix))
|
||
;; Don't split right after a comment starter
|
||
;; since we would just make another comment starter.
|
||
(and comment-start-skip
|
||
(let ((limit (point)))
|
||
(beginning-of-line)
|
||
(and (re-search-forward comment-start-skip
|
||
limit t)
|
||
(eq (point) limit))))))
|
||
;; No good place to break => stop trying.
|
||
(setq give-up t)
|
||
;; Ok, we have a useful place to break the line. Do it.
|
||
(let ((prev-column (current-column)))
|
||
;; If point is at the fill-point, do not `save-excursion'.
|
||
;; Otherwise, if a comment prefix or fill-prefix is inserted,
|
||
;; point will end up before it rather than after it.
|
||
(if (save-excursion
|
||
(skip-chars-backward " \t")
|
||
(= (point) fill-point))
|
||
(default-indent-new-line t)
|
||
(save-excursion
|
||
(goto-char fill-point)
|
||
(default-indent-new-line t)))
|
||
;; Now do justification, if required
|
||
(if (not (eq justify 'left))
|
||
(save-excursion
|
||
(end-of-line 0)
|
||
(justify-current-line justify nil t)))
|
||
;; If making the new line didn't reduce the hpos of
|
||
;; the end of the line, then give up now;
|
||
;; trying again will not help.
|
||
(if (>= (current-column) prev-column)
|
||
(setq give-up t))))))
|
||
;; Justify last line.
|
||
(justify-current-line justify t t)
|
||
t)))
|
||
|
||
(defvar comment-line-break-function 'comment-indent-new-line
|
||
"Mode-specific function which line breaks and continues a comment.
|
||
This function is called during auto-filling when a comment syntax
|
||
is defined.
|
||
The function should take a single optional argument, which is a flag
|
||
indicating whether it should use soft newlines.")
|
||
|
||
(defun default-indent-new-line (&optional soft)
|
||
"Break line at point and indent.
|
||
If a comment syntax is defined, call `comment-indent-new-line'.
|
||
|
||
The inserted newline is marked hard if variable `use-hard-newlines' is true,
|
||
unless optional argument SOFT is non-nil."
|
||
(interactive)
|
||
(if comment-start
|
||
(funcall comment-line-break-function soft)
|
||
;; Insert the newline before removing empty space so that markers
|
||
;; get preserved better.
|
||
(if soft (insert-and-inherit ?\n) (newline 1))
|
||
(save-excursion (forward-char -1) (delete-horizontal-space))
|
||
(delete-horizontal-space)
|
||
|
||
(if (and fill-prefix (not adaptive-fill-mode))
|
||
;; Blindly trust a non-adaptive fill-prefix.
|
||
(progn
|
||
(indent-to-left-margin)
|
||
(insert-before-markers-and-inherit fill-prefix))
|
||
|
||
(cond
|
||
;; If there's an adaptive prefix, use it unless we're inside
|
||
;; a comment and the prefix is not a comment starter.
|
||
(fill-prefix
|
||
(indent-to-left-margin)
|
||
(insert-and-inherit fill-prefix))
|
||
;; If we're not inside a comment, just try to indent.
|
||
(t (indent-according-to-mode))))))
|
||
|
||
(defvar normal-auto-fill-function 'do-auto-fill
|
||
"The function to use for `auto-fill-function' if Auto Fill mode is turned on.
|
||
Some major modes set this.")
|
||
|
||
(put 'auto-fill-function :minor-mode-function 'auto-fill-mode)
|
||
;; `functions' and `hooks' are usually unsafe to set, but setting
|
||
;; auto-fill-function to nil in a file-local setting is safe and
|
||
;; can be useful to prevent auto-filling.
|
||
(put 'auto-fill-function 'safe-local-variable 'null)
|
||
|
||
(define-minor-mode auto-fill-mode
|
||
"Toggle automatic line breaking (Auto Fill mode).
|
||
With a prefix argument ARG, enable Auto Fill mode if ARG is
|
||
positive, and disable it otherwise. If called from Lisp, enable
|
||
the mode if ARG is omitted or nil.
|
||
|
||
When Auto Fill mode is enabled, inserting a space at a column
|
||
beyond `current-fill-column' automatically breaks the line at a
|
||
previous space.
|
||
|
||
When `auto-fill-mode' is on, the `auto-fill-function' variable is
|
||
non-nil.
|
||
|
||
The value of `normal-auto-fill-function' specifies the function to use
|
||
for `auto-fill-function' when turning Auto Fill mode on."
|
||
:variable (auto-fill-function
|
||
. (lambda (v) (setq auto-fill-function
|
||
(if v normal-auto-fill-function)))))
|
||
|
||
;; This holds a document string used to document auto-fill-mode.
|
||
(defun auto-fill-function ()
|
||
"Automatically break line at a previous space, in insertion of text."
|
||
nil)
|
||
|
||
(defun turn-on-auto-fill ()
|
||
"Unconditionally turn on Auto Fill mode."
|
||
(auto-fill-mode 1))
|
||
|
||
(defun turn-off-auto-fill ()
|
||
"Unconditionally turn off Auto Fill mode."
|
||
(auto-fill-mode -1))
|
||
|
||
(custom-add-option 'text-mode-hook 'turn-on-auto-fill)
|
||
|
||
(defun set-fill-column (arg)
|
||
"Set `fill-column' to specified argument.
|
||
Use \\[universal-argument] followed by a number to specify a column.
|
||
Just \\[universal-argument] as argument means to use the current column."
|
||
(interactive
|
||
(list (or current-prefix-arg
|
||
;; We used to use current-column silently, but C-x f is too easily
|
||
;; typed as a typo for C-x C-f, so we turned it into an error and
|
||
;; now an interactive prompt.
|
||
(read-number "Set fill-column to: " (current-column)))))
|
||
(if (consp arg)
|
||
(setq arg (current-column)))
|
||
(if (not (integerp arg))
|
||
;; Disallow missing argument; it's probably a typo for C-x C-f.
|
||
(error "set-fill-column requires an explicit argument")
|
||
(message "Fill column set to %d (was %d)" arg fill-column)
|
||
(setq fill-column arg)))
|
||
|
||
(defun set-selective-display (arg)
|
||
"Set `selective-display' to ARG; clear it if no arg.
|
||
When the value of `selective-display' is a number > 0,
|
||
lines whose indentation is >= that value are not displayed.
|
||
The variable `selective-display' has a separate value for each buffer."
|
||
(interactive "P")
|
||
(if (eq selective-display t)
|
||
(error "selective-display already in use for marked lines"))
|
||
(let ((current-vpos
|
||
(save-restriction
|
||
(narrow-to-region (point-min) (point))
|
||
(goto-char (window-start))
|
||
(vertical-motion (window-height)))))
|
||
(setq selective-display
|
||
(and arg (prefix-numeric-value arg)))
|
||
(recenter current-vpos))
|
||
(set-window-start (selected-window) (window-start))
|
||
(princ "selective-display set to " t)
|
||
(prin1 selective-display t)
|
||
(princ "." t))
|
||
|
||
(defvaralias 'indicate-unused-lines 'indicate-empty-lines)
|
||
|
||
(defun toggle-truncate-lines (&optional arg)
|
||
"Toggle truncating of long lines for the current buffer.
|
||
When truncating is off, long lines are folded.
|
||
With prefix argument ARG, truncate long lines if ARG is positive,
|
||
otherwise fold them. Note that in side-by-side windows, this
|
||
command has no effect if `truncate-partial-width-windows' is
|
||
non-nil."
|
||
(interactive "P")
|
||
(setq truncate-lines
|
||
(if (null arg)
|
||
(not truncate-lines)
|
||
(> (prefix-numeric-value arg) 0)))
|
||
(force-mode-line-update)
|
||
(unless truncate-lines
|
||
(let ((buffer (current-buffer)))
|
||
(walk-windows (lambda (window)
|
||
(if (eq buffer (window-buffer window))
|
||
(set-window-hscroll window 0)))
|
||
nil t)))
|
||
(message "Truncate long lines %s"
|
||
(if truncate-lines "enabled" "disabled")))
|
||
|
||
(defun toggle-word-wrap (&optional arg)
|
||
"Toggle whether to use word-wrapping for continuation lines.
|
||
With prefix argument ARG, wrap continuation lines at word boundaries
|
||
if ARG is positive, otherwise wrap them at the right screen edge.
|
||
This command toggles the value of `word-wrap'. It has no effect
|
||
if long lines are truncated."
|
||
(interactive "P")
|
||
(setq word-wrap
|
||
(if (null arg)
|
||
(not word-wrap)
|
||
(> (prefix-numeric-value arg) 0)))
|
||
(force-mode-line-update)
|
||
(message "Word wrapping %s"
|
||
(if word-wrap "enabled" "disabled")))
|
||
|
||
(defvar overwrite-mode-textual (purecopy " Ovwrt")
|
||
"The string displayed in the mode line when in overwrite mode.")
|
||
(defvar overwrite-mode-binary (purecopy " Bin Ovwrt")
|
||
"The string displayed in the mode line when in binary overwrite mode.")
|
||
|
||
(define-minor-mode overwrite-mode
|
||
"Toggle Overwrite mode.
|
||
With a prefix argument ARG, enable Overwrite mode if ARG is
|
||
positive, and disable it otherwise. If called from Lisp, enable
|
||
the mode if ARG is omitted or nil.
|
||
|
||
When Overwrite mode is enabled, printing characters typed in
|
||
replace existing text on a one-for-one basis, rather than pushing
|
||
it to the right. At the end of a line, such characters extend
|
||
the line. Before a tab, such characters insert until the tab is
|
||
filled in. \\[quoted-insert] still inserts characters in
|
||
overwrite mode; this is supposed to make it easier to insert
|
||
characters when necessary."
|
||
:variable (overwrite-mode
|
||
. (lambda (v) (setq overwrite-mode (if v 'overwrite-mode-textual)))))
|
||
|
||
(define-minor-mode binary-overwrite-mode
|
||
"Toggle Binary Overwrite mode.
|
||
With a prefix argument ARG, enable Binary Overwrite mode if ARG
|
||
is positive, and disable it otherwise. If called from Lisp,
|
||
enable the mode if ARG is omitted or nil.
|
||
|
||
When Binary Overwrite mode is enabled, printing characters typed
|
||
in replace existing text. Newlines are not treated specially, so
|
||
typing at the end of a line joins the line to the next, with the
|
||
typed character between them. Typing before a tab character
|
||
simply replaces the tab with the character typed.
|
||
\\[quoted-insert] replaces the text at the cursor, just as
|
||
ordinary typing characters do.
|
||
|
||
Note that Binary Overwrite mode is not its own minor mode; it is
|
||
a specialization of overwrite mode, entered by setting the
|
||
`overwrite-mode' variable to `overwrite-mode-binary'."
|
||
:variable (overwrite-mode
|
||
. (lambda (v) (setq overwrite-mode (if v 'overwrite-mode-binary)))))
|
||
|
||
(define-minor-mode line-number-mode
|
||
"Toggle line number display in the mode line (Line Number mode).
|
||
With a prefix argument ARG, enable Line Number mode if ARG is
|
||
positive, and disable it otherwise. If called from Lisp, enable
|
||
the mode if ARG is omitted or nil.
|
||
|
||
Line numbers do not appear for very large buffers and buffers
|
||
with very long lines; see variables `line-number-display-limit'
|
||
and `line-number-display-limit-width'."
|
||
:init-value t :global t :group 'mode-line)
|
||
|
||
(define-minor-mode column-number-mode
|
||
"Toggle column number display in the mode line (Column Number mode).
|
||
With a prefix argument ARG, enable Column Number mode if ARG is
|
||
positive, and disable it otherwise.
|
||
|
||
If called from Lisp, enable the mode if ARG is omitted or nil."
|
||
:global t :group 'mode-line)
|
||
|
||
(define-minor-mode size-indication-mode
|
||
"Toggle buffer size display in the mode line (Size Indication mode).
|
||
With a prefix argument ARG, enable Size Indication mode if ARG is
|
||
positive, and disable it otherwise.
|
||
|
||
If called from Lisp, enable the mode if ARG is omitted or nil."
|
||
:global t :group 'mode-line)
|
||
|
||
(define-minor-mode auto-save-mode
|
||
"Toggle auto-saving in the current buffer (Auto Save mode).
|
||
With a prefix argument ARG, enable Auto Save mode if ARG is
|
||
positive, and disable it otherwise.
|
||
|
||
If called from Lisp, enable the mode if ARG is omitted or nil."
|
||
:variable ((and buffer-auto-save-file-name
|
||
;; If auto-save is off because buffer has shrunk,
|
||
;; then toggling should turn it on.
|
||
(>= buffer-saved-size 0))
|
||
. (lambda (val)
|
||
(setq buffer-auto-save-file-name
|
||
(cond
|
||
((null val) nil)
|
||
((and buffer-file-name auto-save-visited-file-name
|
||
(not buffer-read-only))
|
||
buffer-file-name)
|
||
(t (make-auto-save-file-name))))))
|
||
;; If -1 was stored here, to temporarily turn off saving,
|
||
;; turn it back on.
|
||
(and (< buffer-saved-size 0)
|
||
(setq buffer-saved-size 0)))
|
||
|
||
(defgroup paren-blinking nil
|
||
"Blinking matching of parens and expressions."
|
||
:prefix "blink-matching-"
|
||
:group 'paren-matching)
|
||
|
||
(defcustom blink-matching-paren t
|
||
"Non-nil means show matching open-paren when close-paren is inserted.
|
||
If t, highlight the paren. If `jump', briefly move cursor to its
|
||
position. If `jump-offscreen', move cursor there even if the
|
||
position is off screen. With any other non-nil value, the
|
||
off-screen position of the opening paren will be shown in the
|
||
echo area."
|
||
:type '(choice
|
||
(const :tag "Disable" nil)
|
||
(const :tag "Highlight" t)
|
||
(const :tag "Move cursor" jump)
|
||
(const :tag "Move cursor, even if off screen" jump-offscreen))
|
||
:group 'paren-blinking)
|
||
|
||
(defcustom blink-matching-paren-on-screen t
|
||
"Non-nil means show matching open-paren when it is on screen.
|
||
If nil, don't show it (but the open-paren can still be shown
|
||
in the echo area when it is off screen).
|
||
|
||
This variable has no effect if `blink-matching-paren' is nil.
|
||
\(In that case, the open-paren is never shown.)
|
||
It is also ignored if `show-paren-mode' is enabled."
|
||
:type 'boolean
|
||
:group 'paren-blinking)
|
||
|
||
(defcustom blink-matching-paren-distance (* 100 1024)
|
||
"If non-nil, maximum distance to search backwards for matching open-paren.
|
||
If nil, search stops at the beginning of the accessible portion of the buffer."
|
||
:version "23.2" ; 25->100k
|
||
:type '(choice (const nil) integer)
|
||
:group 'paren-blinking)
|
||
|
||
(defcustom blink-matching-delay 1
|
||
"Time in seconds to delay after showing a matching paren."
|
||
:type 'number
|
||
:group 'paren-blinking)
|
||
|
||
(defcustom blink-matching-paren-dont-ignore-comments nil
|
||
"If nil, `blink-matching-paren' ignores comments.
|
||
More precisely, when looking for the matching parenthesis,
|
||
it skips the contents of comments that end before point."
|
||
:type 'boolean
|
||
:group 'paren-blinking)
|
||
|
||
(defun blink-matching-check-mismatch (start end)
|
||
"Return whether or not START...END are matching parens.
|
||
END is the current point and START is the blink position.
|
||
START might be nil if no matching starter was found.
|
||
Returns non-nil if we find there is a mismatch."
|
||
(let* ((end-syntax (syntax-after (1- end)))
|
||
(matching-paren (and (consp end-syntax)
|
||
(eq (syntax-class end-syntax) 5)
|
||
(cdr end-syntax))))
|
||
;; For self-matched chars like " and $, we can't know when they're
|
||
;; mismatched or unmatched, so we can only do it for parens.
|
||
(when matching-paren
|
||
(not (and start
|
||
(or
|
||
(eq (char-after start) matching-paren)
|
||
;; The cdr might hold a new paren-class info rather than
|
||
;; a matching-char info, in which case the two CDRs
|
||
;; should match.
|
||
(eq matching-paren (cdr-safe (syntax-after start)))))))))
|
||
|
||
(defvar blink-matching-check-function #'blink-matching-check-mismatch
|
||
"Function to check parentheses mismatches.
|
||
The function takes two arguments (START and END) where START is the
|
||
position just before the opening token and END is the position right after.
|
||
START can be nil, if it was not found.
|
||
The function should return non-nil if the two tokens do not match.")
|
||
|
||
(defvar blink-matching--overlay
|
||
(let ((ol (make-overlay (point) (point) nil t)))
|
||
(overlay-put ol 'face 'show-paren-match)
|
||
(delete-overlay ol)
|
||
ol)
|
||
"Overlay used to highlight the matching paren.")
|
||
|
||
(defun blink-matching-open ()
|
||
"Momentarily highlight the beginning of the sexp before point."
|
||
(interactive)
|
||
(when (and (not (bobp))
|
||
blink-matching-paren)
|
||
(let* ((oldpos (point))
|
||
(message-log-max nil) ; Don't log messages about paren matching.
|
||
(blinkpos
|
||
(save-excursion
|
||
(save-restriction
|
||
(if blink-matching-paren-distance
|
||
(narrow-to-region
|
||
(max (minibuffer-prompt-end) ;(point-min) unless minibuf.
|
||
(- (point) blink-matching-paren-distance))
|
||
oldpos))
|
||
(let ((parse-sexp-ignore-comments
|
||
(and parse-sexp-ignore-comments
|
||
(not blink-matching-paren-dont-ignore-comments))))
|
||
(condition-case ()
|
||
(progn
|
||
(syntax-propertize (point))
|
||
(forward-sexp -1)
|
||
;; backward-sexp skips backward over prefix chars,
|
||
;; so move back to the matching paren.
|
||
(while (and (< (point) (1- oldpos))
|
||
(let ((code (syntax-after (point))))
|
||
(or (eq (syntax-class code) 6)
|
||
(eq (logand 1048576 (car code))
|
||
1048576))))
|
||
(forward-char 1))
|
||
(point))
|
||
(error nil))))))
|
||
(mismatch (funcall blink-matching-check-function blinkpos oldpos)))
|
||
(cond
|
||
(mismatch
|
||
(if blinkpos
|
||
(if (minibufferp)
|
||
(minibuffer-message "Mismatched parentheses")
|
||
(message "Mismatched parentheses"))
|
||
(if (minibufferp)
|
||
(minibuffer-message "No matching parenthesis found")
|
||
(message "No matching parenthesis found"))))
|
||
((not blinkpos) nil)
|
||
((or
|
||
(eq blink-matching-paren 'jump-offscreen)
|
||
(pos-visible-in-window-p blinkpos))
|
||
;; Matching open within window, temporarily move to or highlight
|
||
;; char after blinkpos but only if `blink-matching-paren-on-screen'
|
||
;; is non-nil.
|
||
(and blink-matching-paren-on-screen
|
||
(not show-paren-mode)
|
||
(if (memq blink-matching-paren '(jump jump-offscreen))
|
||
(save-excursion
|
||
(goto-char blinkpos)
|
||
(sit-for blink-matching-delay))
|
||
(unwind-protect
|
||
(progn
|
||
(move-overlay blink-matching--overlay blinkpos (1+ blinkpos)
|
||
(current-buffer))
|
||
(sit-for blink-matching-delay))
|
||
(delete-overlay blink-matching--overlay)))))
|
||
(t
|
||
(let ((open-paren-line-string
|
||
(save-excursion
|
||
(goto-char blinkpos)
|
||
;; Show what precedes the open in its line, if anything.
|
||
(cond
|
||
((save-excursion (skip-chars-backward " \t") (not (bolp)))
|
||
(buffer-substring (line-beginning-position)
|
||
(1+ blinkpos)))
|
||
;; Show what follows the open in its line, if anything.
|
||
((save-excursion
|
||
(forward-char 1)
|
||
(skip-chars-forward " \t")
|
||
(not (eolp)))
|
||
(buffer-substring blinkpos
|
||
(line-end-position)))
|
||
;; Otherwise show the previous nonblank line,
|
||
;; if there is one.
|
||
((save-excursion (skip-chars-backward "\n \t") (not (bobp)))
|
||
(concat
|
||
(buffer-substring (progn
|
||
(skip-chars-backward "\n \t")
|
||
(line-beginning-position))
|
||
(progn (end-of-line)
|
||
(skip-chars-backward " \t")
|
||
(point)))
|
||
;; Replace the newline and other whitespace with `...'.
|
||
"..."
|
||
(buffer-substring blinkpos (1+ blinkpos))))
|
||
;; There is nothing to show except the char itself.
|
||
(t (buffer-substring blinkpos (1+ blinkpos)))))))
|
||
(minibuffer-message
|
||
"Matches %s"
|
||
(substring-no-properties open-paren-line-string))))))))
|
||
|
||
(defvar blink-paren-function 'blink-matching-open
|
||
"Function called, if non-nil, whenever a close parenthesis is inserted.
|
||
More precisely, a char with closeparen syntax is self-inserted.")
|
||
|
||
(defun blink-paren-post-self-insert-function ()
|
||
(when (and (eq (char-before) last-command-event) ; Sanity check.
|
||
(memq (char-syntax last-command-event) '(?\) ?\$))
|
||
blink-paren-function
|
||
(not executing-kbd-macro)
|
||
(not noninteractive)
|
||
;; Verify an even number of quoting characters precede the close.
|
||
;; FIXME: Also check if this parenthesis closes a comment as
|
||
;; can happen in Pascal and SML.
|
||
(= 1 (logand 1 (- (point)
|
||
(save-excursion
|
||
(forward-char -1)
|
||
(skip-syntax-backward "/\\")
|
||
(point))))))
|
||
(funcall blink-paren-function)))
|
||
|
||
(put 'blink-paren-post-self-insert-function 'priority 100)
|
||
|
||
(add-hook 'post-self-insert-hook #'blink-paren-post-self-insert-function
|
||
;; Most likely, this hook is nil, so this arg doesn't matter,
|
||
;; but I use it as a reminder that this function usually
|
||
;; likes to be run after others since it does
|
||
;; `sit-for'. That's also the reason it get a `priority' prop
|
||
;; of 100.
|
||
'append)
|
||
|
||
;; This executes C-g typed while Emacs is waiting for a command.
|
||
;; Quitting out of a program does not go through here;
|
||
;; that happens in the QUIT macro at the C code level.
|
||
(defun keyboard-quit ()
|
||
"Signal a `quit' condition.
|
||
During execution of Lisp code, this character causes a quit directly.
|
||
At top-level, as an editor command, this simply beeps."
|
||
(interactive)
|
||
;; Avoid adding the region to the window selection.
|
||
(setq saved-region-selection nil)
|
||
(let (select-active-regions)
|
||
(deactivate-mark))
|
||
(if (fboundp 'kmacro-keyboard-quit)
|
||
(kmacro-keyboard-quit))
|
||
(when completion-in-region-mode
|
||
(completion-in-region-mode -1))
|
||
;; Force the next redisplay cycle to remove the "Def" indicator from
|
||
;; all the mode lines.
|
||
(if defining-kbd-macro
|
||
(force-mode-line-update t))
|
||
(setq defining-kbd-macro nil)
|
||
(let ((debug-on-quit nil))
|
||
(signal 'quit nil)))
|
||
|
||
(defvar buffer-quit-function nil
|
||
"Function to call to \"quit\" the current buffer, or nil if none.
|
||
\\[keyboard-escape-quit] calls this function when its more local actions
|
||
\(such as canceling a prefix argument, minibuffer or region) do not apply.")
|
||
|
||
(defun keyboard-escape-quit ()
|
||
"Exit the current \"mode\" (in a generalized sense of the word).
|
||
This command can exit an interactive command such as `query-replace',
|
||
can clear out a prefix argument or a region,
|
||
can get out of the minibuffer or other recursive edit,
|
||
cancel the use of the current buffer (for special-purpose buffers),
|
||
or go back to just one window (by deleting all but the selected window)."
|
||
(interactive)
|
||
(cond ((eq last-command 'mode-exited) nil)
|
||
((region-active-p)
|
||
(deactivate-mark))
|
||
((> (minibuffer-depth) 0)
|
||
(abort-recursive-edit))
|
||
(current-prefix-arg
|
||
nil)
|
||
((> (recursion-depth) 0)
|
||
(exit-recursive-edit))
|
||
(buffer-quit-function
|
||
(funcall buffer-quit-function))
|
||
((not (one-window-p t))
|
||
(delete-other-windows))
|
||
((string-match "^ \\*" (buffer-name (current-buffer)))
|
||
(bury-buffer))))
|
||
|
||
(defun play-sound-file (file &optional volume device)
|
||
"Play sound stored in FILE.
|
||
VOLUME and DEVICE correspond to the keywords of the sound
|
||
specification for `play-sound'."
|
||
(interactive "fPlay sound file: ")
|
||
(let ((sound (list :file file)))
|
||
(if volume
|
||
(plist-put sound :volume volume))
|
||
(if device
|
||
(plist-put sound :device device))
|
||
(push 'sound sound)
|
||
(play-sound sound)))
|
||
|
||
|
||
(defcustom read-mail-command 'rmail
|
||
"Your preference for a mail reading package.
|
||
This is used by some keybindings which support reading mail.
|
||
See also `mail-user-agent' concerning sending mail."
|
||
:type '(radio (function-item :tag "Rmail" :format "%t\n" rmail)
|
||
(function-item :tag "Gnus" :format "%t\n" gnus)
|
||
(function-item :tag "Emacs interface to MH"
|
||
:format "%t\n" mh-rmail)
|
||
(function :tag "Other"))
|
||
:version "21.1"
|
||
:group 'mail)
|
||
|
||
(defcustom mail-user-agent 'message-user-agent
|
||
"Your preference for a mail composition package.
|
||
Various Emacs Lisp packages (e.g. Reporter) require you to compose an
|
||
outgoing email message. This variable lets you specify which
|
||
mail-sending package you prefer.
|
||
|
||
Valid values include:
|
||
|
||
`message-user-agent' -- use the Message package.
|
||
See Info node `(message)'.
|
||
`sendmail-user-agent' -- use the Mail package.
|
||
See Info node `(emacs)Sending Mail'.
|
||
`mh-e-user-agent' -- use the Emacs interface to the MH mail system.
|
||
See Info node `(mh-e)'.
|
||
`gnus-user-agent' -- like `message-user-agent', but with Gnus
|
||
paraphernalia if Gnus is running, particularly
|
||
the Gcc: header for archiving.
|
||
|
||
Additional valid symbols may be available; check with the author of
|
||
your package for details. The function should return non-nil if it
|
||
succeeds.
|
||
|
||
See also `read-mail-command' concerning reading mail."
|
||
:type '(radio (function-item :tag "Message package"
|
||
:format "%t\n"
|
||
message-user-agent)
|
||
(function-item :tag "Mail package"
|
||
:format "%t\n"
|
||
sendmail-user-agent)
|
||
(function-item :tag "Emacs interface to MH"
|
||
:format "%t\n"
|
||
mh-e-user-agent)
|
||
(function-item :tag "Message with full Gnus features"
|
||
:format "%t\n"
|
||
gnus-user-agent)
|
||
(function :tag "Other"))
|
||
:version "23.2" ; sendmail->message
|
||
:group 'mail)
|
||
|
||
(defcustom compose-mail-user-agent-warnings t
|
||
"If non-nil, `compose-mail' warns about changes in `mail-user-agent'.
|
||
If the value of `mail-user-agent' is the default, and the user
|
||
appears to have customizations applying to the old default,
|
||
`compose-mail' issues a warning."
|
||
:type 'boolean
|
||
:version "23.2"
|
||
:group 'mail)
|
||
|
||
(defun rfc822-goto-eoh ()
|
||
"If the buffer starts with a mail header, move point to the header's end.
|
||
Otherwise, moves to `point-min'.
|
||
The end of the header is the start of the next line, if there is one,
|
||
else the end of the last line. This function obeys RFC822."
|
||
(goto-char (point-min))
|
||
(when (re-search-forward
|
||
"^\\([:\n]\\|[^: \t\n]+[ \t\n]\\)" nil 'move)
|
||
(goto-char (match-beginning 0))))
|
||
|
||
;; Used by Rmail (e.g., rmail-forward).
|
||
(defvar mail-encode-mml nil
|
||
"If non-nil, mail-user-agent's `sendfunc' command should mml-encode
|
||
the outgoing message before sending it.")
|
||
|
||
(defun compose-mail (&optional to subject other-headers continue
|
||
switch-function yank-action send-actions
|
||
return-action)
|
||
"Start composing a mail message to send.
|
||
This uses the user's chosen mail composition package
|
||
as selected with the variable `mail-user-agent'.
|
||
The optional arguments TO and SUBJECT specify recipients
|
||
and the initial Subject field, respectively.
|
||
|
||
OTHER-HEADERS is an alist specifying additional
|
||
header fields. Elements look like (HEADER . VALUE) where both
|
||
HEADER and VALUE are strings.
|
||
|
||
CONTINUE, if non-nil, says to continue editing a message already
|
||
being composed. Interactively, CONTINUE is the prefix argument.
|
||
|
||
SWITCH-FUNCTION, if non-nil, is a function to use to
|
||
switch to and display the buffer used for mail composition.
|
||
|
||
YANK-ACTION, if non-nil, is an action to perform, if and when necessary,
|
||
to insert the raw text of the message being replied to.
|
||
It has the form (FUNCTION . ARGS). The user agent will apply
|
||
FUNCTION to ARGS, to insert the raw text of the original message.
|
||
\(The user agent will also run `mail-citation-hook', *after* the
|
||
original text has been inserted in this way.)
|
||
|
||
SEND-ACTIONS is a list of actions to call when the message is sent.
|
||
Each action has the form (FUNCTION . ARGS).
|
||
|
||
RETURN-ACTION, if non-nil, is an action for returning to the
|
||
caller. It has the form (FUNCTION . ARGS). The function is
|
||
called after the mail has been sent or put aside, and the mail
|
||
buffer buried."
|
||
(interactive
|
||
(list nil nil nil current-prefix-arg))
|
||
|
||
;; In Emacs 23.2, the default value of `mail-user-agent' changed
|
||
;; from sendmail-user-agent to message-user-agent. Some users may
|
||
;; encounter incompatibilities. This hack tries to detect problems
|
||
;; and warn about them.
|
||
(and compose-mail-user-agent-warnings
|
||
(eq mail-user-agent 'message-user-agent)
|
||
(let (warn-vars)
|
||
(dolist (var '(mail-mode-hook mail-send-hook mail-setup-hook
|
||
mail-yank-hooks mail-archive-file-name
|
||
mail-default-reply-to mail-mailing-lists
|
||
mail-self-blind))
|
||
(and (boundp var)
|
||
(symbol-value var)
|
||
(push var warn-vars)))
|
||
(when warn-vars
|
||
(display-warning 'mail
|
||
(format-message "\
|
||
The default mail mode is now Message mode.
|
||
You have the following Mail mode variable%s customized:
|
||
\n %s\n\nTo use Mail mode, set `mail-user-agent' to sendmail-user-agent.
|
||
To disable this warning, set `compose-mail-user-agent-warnings' to nil."
|
||
(if (> (length warn-vars) 1) "s" "")
|
||
(mapconcat 'symbol-name
|
||
warn-vars " "))))))
|
||
|
||
(let ((function (get mail-user-agent 'composefunc)))
|
||
(funcall function to subject other-headers continue switch-function
|
||
yank-action send-actions return-action)))
|
||
|
||
(defun compose-mail-other-window (&optional to subject other-headers continue
|
||
yank-action send-actions
|
||
return-action)
|
||
"Like \\[compose-mail], but edit the outgoing message in another window."
|
||
(interactive (list nil nil nil current-prefix-arg))
|
||
(compose-mail to subject other-headers continue
|
||
'switch-to-buffer-other-window yank-action send-actions
|
||
return-action))
|
||
|
||
(defun compose-mail-other-frame (&optional to subject other-headers continue
|
||
yank-action send-actions
|
||
return-action)
|
||
"Like \\[compose-mail], but edit the outgoing message in another frame."
|
||
(interactive (list nil nil nil current-prefix-arg))
|
||
(compose-mail to subject other-headers continue
|
||
'switch-to-buffer-other-frame yank-action send-actions
|
||
return-action))
|
||
|
||
|
||
(defvar set-variable-value-history nil
|
||
"History of values entered with `set-variable'.
|
||
|
||
Maximum length of the history list is determined by the value
|
||
of `history-length', which see.")
|
||
|
||
(defun set-variable (variable value &optional make-local)
|
||
"Set VARIABLE to VALUE. VALUE is a Lisp object.
|
||
VARIABLE should be a user option variable name, a Lisp variable
|
||
meant to be customized by users. You should enter VALUE in Lisp syntax,
|
||
so if you want VALUE to be a string, you must surround it with doublequotes.
|
||
VALUE is used literally, not evaluated.
|
||
|
||
If VARIABLE has a `variable-interactive' property, that is used as if
|
||
it were the arg to `interactive' (which see) to interactively read VALUE.
|
||
|
||
If VARIABLE has been defined with `defcustom', then the type information
|
||
in the definition is used to check that VALUE is valid.
|
||
|
||
Note that this function is at heart equivalent to the basic `set' function.
|
||
For a variable defined with `defcustom', it does not pay attention to
|
||
any :set property that the variable might have (if you want that, use
|
||
\\[customize-set-variable] instead).
|
||
|
||
With a prefix argument, set VARIABLE to VALUE buffer-locally."
|
||
(interactive
|
||
(let* ((default-var (variable-at-point))
|
||
(var (if (custom-variable-p default-var)
|
||
(read-variable (format "Set variable (default %s): " default-var)
|
||
default-var)
|
||
(read-variable "Set variable: ")))
|
||
(minibuffer-help-form '(describe-variable var))
|
||
(prop (get var 'variable-interactive))
|
||
(obsolete (car (get var 'byte-obsolete-variable)))
|
||
(prompt (format "Set %s %s to value: " var
|
||
(cond ((local-variable-p var)
|
||
"(buffer-local)")
|
||
((or current-prefix-arg
|
||
(local-variable-if-set-p var))
|
||
"buffer-locally")
|
||
(t "globally"))))
|
||
(val (progn
|
||
(when obsolete
|
||
(message (concat "`%S' is obsolete; "
|
||
(if (symbolp obsolete) "use `%S' instead" "%s"))
|
||
var obsolete)
|
||
(sit-for 3))
|
||
(if prop
|
||
;; Use VAR's `variable-interactive' property
|
||
;; as an interactive spec for prompting.
|
||
(call-interactively `(lambda (arg)
|
||
(interactive ,prop)
|
||
arg))
|
||
(read-from-minibuffer prompt nil
|
||
read-expression-map t
|
||
'set-variable-value-history
|
||
(format "%S" (symbol-value var)))))))
|
||
(list var val current-prefix-arg)))
|
||
|
||
(and (custom-variable-p variable)
|
||
(not (get variable 'custom-type))
|
||
(custom-load-symbol variable))
|
||
(let ((type (get variable 'custom-type)))
|
||
(when type
|
||
;; Match with custom type.
|
||
(require 'cus-edit)
|
||
(setq type (widget-convert type))
|
||
(unless (widget-apply type :match value)
|
||
(user-error "Value `%S' does not match type %S of %S"
|
||
value (car type) variable))))
|
||
|
||
(if make-local
|
||
(make-local-variable variable))
|
||
|
||
(set variable value)
|
||
|
||
;; Force a thorough redisplay for the case that the variable
|
||
;; has an effect on the display, like `tab-width' has.
|
||
(force-mode-line-update))
|
||
|
||
;; Define the major mode for lists of completions.
|
||
|
||
(defvar completion-list-mode-map
|
||
(let ((map (make-sparse-keymap)))
|
||
(define-key map [mouse-2] 'choose-completion)
|
||
(define-key map [follow-link] 'mouse-face)
|
||
(define-key map [down-mouse-2] nil)
|
||
(define-key map "\C-m" 'choose-completion)
|
||
(define-key map "\e\e\e" 'delete-completion-window)
|
||
(define-key map [left] 'previous-completion)
|
||
(define-key map [right] 'next-completion)
|
||
(define-key map [?\t] 'next-completion)
|
||
(define-key map [backtab] 'previous-completion)
|
||
(define-key map "q" 'quit-window)
|
||
(define-key map "z" 'kill-this-buffer)
|
||
map)
|
||
"Local map for completion list buffers.")
|
||
|
||
;; Completion mode is suitable only for specially formatted data.
|
||
(put 'completion-list-mode 'mode-class 'special)
|
||
|
||
(defvar completion-reference-buffer nil
|
||
"Record the buffer that was current when the completion list was requested.
|
||
This is a local variable in the completion list buffer.
|
||
Initial value is nil to avoid some compiler warnings.")
|
||
|
||
(defvar completion-no-auto-exit nil
|
||
"Non-nil means `choose-completion-string' should never exit the minibuffer.
|
||
This also applies to other functions such as `choose-completion'.")
|
||
|
||
(defvar completion-base-position nil
|
||
"Position of the base of the text corresponding to the shown completions.
|
||
This variable is used in the *Completions* buffers.
|
||
Its value is a list of the form (START END) where START is the place
|
||
where the completion should be inserted and END (if non-nil) is the end
|
||
of the text to replace. If END is nil, point is used instead.")
|
||
|
||
(defvar completion-list-insert-choice-function #'completion--replace
|
||
"Function to use to insert the text chosen in *Completions*.
|
||
Called with three arguments (BEG END TEXT), it should replace the text
|
||
between BEG and END with TEXT. Expected to be set buffer-locally
|
||
in the *Completions* buffer.")
|
||
|
||
(defvar completion-base-size nil
|
||
"Number of chars before point not involved in completion.
|
||
This is a local variable in the completion list buffer.
|
||
It refers to the chars in the minibuffer if completing in the
|
||
minibuffer, or in `completion-reference-buffer' otherwise.
|
||
Only characters in the field at point are included.
|
||
|
||
If nil, Emacs determines which part of the tail end of the
|
||
buffer's text is involved in completion by comparing the text
|
||
directly.")
|
||
(make-obsolete-variable 'completion-base-size 'completion-base-position "23.2")
|
||
|
||
(defun delete-completion-window ()
|
||
"Delete the completion list window.
|
||
Go to the window from which completion was requested."
|
||
(interactive)
|
||
(let ((buf completion-reference-buffer))
|
||
(if (one-window-p t)
|
||
(if (window-dedicated-p) (delete-frame))
|
||
(delete-window (selected-window))
|
||
(if (get-buffer-window buf)
|
||
(select-window (get-buffer-window buf))))))
|
||
|
||
(defun previous-completion (n)
|
||
"Move to the previous item in the completion list."
|
||
(interactive "p")
|
||
(next-completion (- n)))
|
||
|
||
(defun next-completion (n)
|
||
"Move to the next item in the completion list.
|
||
With prefix argument N, move N items (negative N means move backward)."
|
||
(interactive "p")
|
||
(let ((beg (point-min)) (end (point-max)))
|
||
(while (and (> n 0) (not (eobp)))
|
||
;; If in a completion, move to the end of it.
|
||
(when (get-text-property (point) 'mouse-face)
|
||
(goto-char (next-single-property-change (point) 'mouse-face nil end)))
|
||
;; Move to start of next one.
|
||
(unless (get-text-property (point) 'mouse-face)
|
||
(goto-char (next-single-property-change (point) 'mouse-face nil end)))
|
||
(setq n (1- n)))
|
||
(while (and (< n 0) (not (bobp)))
|
||
(let ((prop (get-text-property (1- (point)) 'mouse-face)))
|
||
;; If in a completion, move to the start of it.
|
||
(when (and prop (eq prop (get-text-property (point) 'mouse-face)))
|
||
(goto-char (previous-single-property-change
|
||
(point) 'mouse-face nil beg)))
|
||
;; Move to end of the previous completion.
|
||
(unless (or (bobp) (get-text-property (1- (point)) 'mouse-face))
|
||
(goto-char (previous-single-property-change
|
||
(point) 'mouse-face nil beg)))
|
||
;; Move to the start of that one.
|
||
(goto-char (previous-single-property-change
|
||
(point) 'mouse-face nil beg))
|
||
(setq n (1+ n))))))
|
||
|
||
(defun choose-completion (&optional event)
|
||
"Choose the completion at point.
|
||
If EVENT, use EVENT's position to determine the starting position."
|
||
(interactive (list last-nonmenu-event))
|
||
;; In case this is run via the mouse, give temporary modes such as
|
||
;; isearch a chance to turn off.
|
||
(run-hooks 'mouse-leave-buffer-hook)
|
||
(with-current-buffer (window-buffer (posn-window (event-start event)))
|
||
(let ((buffer completion-reference-buffer)
|
||
(base-size completion-base-size)
|
||
(base-position completion-base-position)
|
||
(insert-function completion-list-insert-choice-function)
|
||
(choice
|
||
(save-excursion
|
||
(goto-char (posn-point (event-start event)))
|
||
(let (beg end)
|
||
(cond
|
||
((and (not (eobp)) (get-text-property (point) 'mouse-face))
|
||
(setq end (point) beg (1+ (point))))
|
||
((and (not (bobp))
|
||
(get-text-property (1- (point)) 'mouse-face))
|
||
(setq end (1- (point)) beg (point)))
|
||
(t (error "No completion here")))
|
||
(setq beg (previous-single-property-change beg 'mouse-face))
|
||
(setq end (or (next-single-property-change end 'mouse-face)
|
||
(point-max)))
|
||
(buffer-substring-no-properties beg end)))))
|
||
|
||
(unless (buffer-live-p buffer)
|
||
(error "Destination buffer is dead"))
|
||
(quit-window nil (posn-window (event-start event)))
|
||
|
||
(with-current-buffer buffer
|
||
(choose-completion-string
|
||
choice buffer
|
||
(or base-position
|
||
(when base-size
|
||
;; Someone's using old completion code that doesn't know
|
||
;; about base-position yet.
|
||
(list (+ base-size (field-beginning))))
|
||
;; If all else fails, just guess.
|
||
(list (choose-completion-guess-base-position choice)))
|
||
insert-function)))))
|
||
|
||
;; Delete the longest partial match for STRING
|
||
;; that can be found before POINT.
|
||
(defun choose-completion-guess-base-position (string)
|
||
(save-excursion
|
||
(let ((opoint (point))
|
||
len)
|
||
;; Try moving back by the length of the string.
|
||
(goto-char (max (- (point) (length string))
|
||
(minibuffer-prompt-end)))
|
||
;; See how far back we were actually able to move. That is the
|
||
;; upper bound on how much we can match and delete.
|
||
(setq len (- opoint (point)))
|
||
(if completion-ignore-case
|
||
(setq string (downcase string)))
|
||
(while (and (> len 0)
|
||
(let ((tail (buffer-substring (point) opoint)))
|
||
(if completion-ignore-case
|
||
(setq tail (downcase tail)))
|
||
(not (string= tail (substring string 0 len)))))
|
||
(setq len (1- len))
|
||
(forward-char 1))
|
||
(point))))
|
||
|
||
(defun choose-completion-delete-max-match (string)
|
||
(declare (obsolete choose-completion-guess-base-position "23.2"))
|
||
(delete-region (choose-completion-guess-base-position string) (point)))
|
||
|
||
(defvar choose-completion-string-functions nil
|
||
"Functions that may override the normal insertion of a completion choice.
|
||
These functions are called in order with three arguments:
|
||
CHOICE - the string to insert in the buffer,
|
||
BUFFER - the buffer in which the choice should be inserted,
|
||
BASE-POSITION - where to insert the completion.
|
||
|
||
If a function in the list returns non-nil, that function is supposed
|
||
to have inserted the CHOICE in the BUFFER, and possibly exited
|
||
the minibuffer; no further functions will be called.
|
||
|
||
If all functions in the list return nil, that means to use
|
||
the default method of inserting the completion in BUFFER.")
|
||
|
||
(defun choose-completion-string (choice &optional
|
||
buffer base-position insert-function)
|
||
"Switch to BUFFER and insert the completion choice CHOICE.
|
||
BASE-POSITION says where to insert the completion.
|
||
INSERT-FUNCTION says how to insert the completion and falls
|
||
back on `completion-list-insert-choice-function' when nil."
|
||
|
||
;; If BUFFER is the minibuffer, exit the minibuffer
|
||
;; unless it is reading a file name and CHOICE is a directory,
|
||
;; or completion-no-auto-exit is non-nil.
|
||
|
||
;; Some older code may call us passing `base-size' instead of
|
||
;; `base-position'. It's difficult to make any use of `base-size',
|
||
;; so we just ignore it.
|
||
(unless (consp base-position)
|
||
(message "Obsolete `base-size' passed to choose-completion-string")
|
||
(setq base-position nil))
|
||
|
||
(let* ((buffer (or buffer completion-reference-buffer))
|
||
(mini-p (minibufferp buffer)))
|
||
;; If BUFFER is a minibuffer, barf unless it's the currently
|
||
;; active minibuffer.
|
||
(if (and mini-p
|
||
(not (and (active-minibuffer-window)
|
||
(equal buffer
|
||
(window-buffer (active-minibuffer-window))))))
|
||
(error "Minibuffer is not active for completion")
|
||
;; Set buffer so buffer-local choose-completion-string-functions works.
|
||
(set-buffer buffer)
|
||
(unless (run-hook-with-args-until-success
|
||
'choose-completion-string-functions
|
||
;; The fourth arg used to be `mini-p' but was useless
|
||
;; (since minibufferp can be used on the `buffer' arg)
|
||
;; and indeed unused. The last used to be `base-size', so we
|
||
;; keep it to try and avoid breaking old code.
|
||
choice buffer base-position nil)
|
||
;; This remove-text-properties should be unnecessary since `choice'
|
||
;; comes from buffer-substring-no-properties.
|
||
;;(remove-text-properties 0 (length choice) '(mouse-face nil) choice)
|
||
;; Insert the completion into the buffer where it was requested.
|
||
(funcall (or insert-function completion-list-insert-choice-function)
|
||
(or (car base-position) (point))
|
||
(or (cadr base-position) (point))
|
||
choice)
|
||
;; Update point in the window that BUFFER is showing in.
|
||
(let ((window (get-buffer-window buffer t)))
|
||
(set-window-point window (point)))
|
||
;; If completing for the minibuffer, exit it with this choice.
|
||
(and (not completion-no-auto-exit)
|
||
(minibufferp buffer)
|
||
minibuffer-completion-table
|
||
;; If this is reading a file name, and the file name chosen
|
||
;; is a directory, don't exit the minibuffer.
|
||
(let* ((result (buffer-substring (field-beginning) (point)))
|
||
(bounds
|
||
(completion-boundaries result minibuffer-completion-table
|
||
minibuffer-completion-predicate
|
||
"")))
|
||
(if (eq (car bounds) (length result))
|
||
;; The completion chosen leads to a new set of completions
|
||
;; (e.g. it's a directory): don't exit the minibuffer yet.
|
||
(let ((mini (active-minibuffer-window)))
|
||
(select-window mini)
|
||
(when minibuffer-auto-raise
|
||
(raise-frame (window-frame mini))))
|
||
(exit-minibuffer))))))))
|
||
|
||
(define-derived-mode completion-list-mode nil "Completion List"
|
||
"Major mode for buffers showing lists of possible completions.
|
||
Type \\<completion-list-mode-map>\\[choose-completion] in the completion list\
|
||
to select the completion near point.
|
||
Or click to select one with the mouse.
|
||
|
||
\\{completion-list-mode-map}"
|
||
(set (make-local-variable 'completion-base-size) nil))
|
||
|
||
(defun completion-list-mode-finish ()
|
||
"Finish setup of the completions buffer.
|
||
Called from `temp-buffer-show-hook'."
|
||
(when (eq major-mode 'completion-list-mode)
|
||
(setq buffer-read-only t)))
|
||
|
||
(add-hook 'temp-buffer-show-hook 'completion-list-mode-finish)
|
||
|
||
|
||
;; Variables and faces used in `completion-setup-function'.
|
||
|
||
(defcustom completion-show-help t
|
||
"Non-nil means show help message in *Completions* buffer."
|
||
:type 'boolean
|
||
:version "22.1"
|
||
:group 'completion)
|
||
|
||
;; This function goes in completion-setup-hook, so that it is called
|
||
;; after the text of the completion list buffer is written.
|
||
(defun completion-setup-function ()
|
||
(let* ((mainbuf (current-buffer))
|
||
(base-dir
|
||
;; FIXME: This is a bad hack. We try to set the default-directory
|
||
;; in the *Completions* buffer so that the relative file names
|
||
;; displayed there can be treated as valid file names, independently
|
||
;; from the completion context. But this suffers from many problems:
|
||
;; - It's not clear when the completions are file names. With some
|
||
;; completion tables (e.g. bzr revision specs), the listed
|
||
;; completions can mix file names and other things.
|
||
;; - It doesn't pay attention to possible quoting.
|
||
;; - With fancy completion styles, the code below will not always
|
||
;; find the right base directory.
|
||
(if minibuffer-completing-file-name
|
||
(file-name-as-directory
|
||
(expand-file-name
|
||
(buffer-substring (minibuffer-prompt-end)
|
||
(- (point) (or completion-base-size 0))))))))
|
||
(with-current-buffer standard-output
|
||
(let ((base-size completion-base-size) ;Read before killing localvars.
|
||
(base-position completion-base-position)
|
||
(insert-fun completion-list-insert-choice-function))
|
||
(completion-list-mode)
|
||
(set (make-local-variable 'completion-base-size) base-size)
|
||
(set (make-local-variable 'completion-base-position) base-position)
|
||
(set (make-local-variable 'completion-list-insert-choice-function)
|
||
insert-fun))
|
||
(set (make-local-variable 'completion-reference-buffer) mainbuf)
|
||
(if base-dir (setq default-directory base-dir))
|
||
;; Maybe insert help string.
|
||
(when completion-show-help
|
||
(goto-char (point-min))
|
||
(if (display-mouse-p)
|
||
(insert "Click on a completion to select it.\n"))
|
||
(insert (substitute-command-keys
|
||
"In this buffer, type \\[choose-completion] to \
|
||
select the completion near point.\n\n"))))))
|
||
|
||
(add-hook 'completion-setup-hook 'completion-setup-function)
|
||
|
||
(define-key minibuffer-local-completion-map [prior] 'switch-to-completions)
|
||
(define-key minibuffer-local-completion-map "\M-v" 'switch-to-completions)
|
||
|
||
(defun switch-to-completions ()
|
||
"Select the completion list window."
|
||
(interactive)
|
||
(let ((window (or (get-buffer-window "*Completions*" 0)
|
||
;; Make sure we have a completions window.
|
||
(progn (minibuffer-completion-help)
|
||
(get-buffer-window "*Completions*" 0)))))
|
||
(when window
|
||
(select-window window)
|
||
;; In the new buffer, go to the first completion.
|
||
;; FIXME: Perhaps this should be done in `minibuffer-completion-help'.
|
||
(when (bobp)
|
||
(next-completion 1)))))
|
||
|
||
;;; Support keyboard commands to turn on various modifiers.
|
||
|
||
;; These functions -- which are not commands -- each add one modifier
|
||
;; to the following event.
|
||
|
||
(defun event-apply-alt-modifier (_ignore-prompt)
|
||
"\\<function-key-map>Add the Alt modifier to the following event.
|
||
For example, type \\[event-apply-alt-modifier] & to enter Alt-&."
|
||
(vector (event-apply-modifier (read-event) 'alt 22 "A-")))
|
||
(defun event-apply-super-modifier (_ignore-prompt)
|
||
"\\<function-key-map>Add the Super modifier to the following event.
|
||
For example, type \\[event-apply-super-modifier] & to enter Super-&."
|
||
(vector (event-apply-modifier (read-event) 'super 23 "s-")))
|
||
(defun event-apply-hyper-modifier (_ignore-prompt)
|
||
"\\<function-key-map>Add the Hyper modifier to the following event.
|
||
For example, type \\[event-apply-hyper-modifier] & to enter Hyper-&."
|
||
(vector (event-apply-modifier (read-event) 'hyper 24 "H-")))
|
||
(defun event-apply-shift-modifier (_ignore-prompt)
|
||
"\\<function-key-map>Add the Shift modifier to the following event.
|
||
For example, type \\[event-apply-shift-modifier] & to enter Shift-&."
|
||
(vector (event-apply-modifier (read-event) 'shift 25 "S-")))
|
||
(defun event-apply-control-modifier (_ignore-prompt)
|
||
"\\<function-key-map>Add the Ctrl modifier to the following event.
|
||
For example, type \\[event-apply-control-modifier] & to enter Ctrl-&."
|
||
(vector (event-apply-modifier (read-event) 'control 26 "C-")))
|
||
(defun event-apply-meta-modifier (_ignore-prompt)
|
||
"\\<function-key-map>Add the Meta modifier to the following event.
|
||
For example, type \\[event-apply-meta-modifier] & to enter Meta-&."
|
||
(vector (event-apply-modifier (read-event) 'meta 27 "M-")))
|
||
|
||
(defun event-apply-modifier (event symbol lshiftby prefix)
|
||
"Apply a modifier flag to event EVENT.
|
||
SYMBOL is the name of this modifier, as a symbol.
|
||
LSHIFTBY is the numeric value of this modifier, in keyboard events.
|
||
PREFIX is the string that represents this modifier in an event type symbol."
|
||
(if (numberp event)
|
||
(cond ((eq symbol 'control)
|
||
(if (and (<= (downcase event) ?z)
|
||
(>= (downcase event) ?a))
|
||
(- (downcase event) ?a -1)
|
||
(if (and (<= (downcase event) ?Z)
|
||
(>= (downcase event) ?A))
|
||
(- (downcase event) ?A -1)
|
||
(logior (lsh 1 lshiftby) event))))
|
||
((eq symbol 'shift)
|
||
(if (and (<= (downcase event) ?z)
|
||
(>= (downcase event) ?a))
|
||
(upcase event)
|
||
(logior (lsh 1 lshiftby) event)))
|
||
(t
|
||
(logior (lsh 1 lshiftby) event)))
|
||
(if (memq symbol (event-modifiers event))
|
||
event
|
||
(let ((event-type (if (symbolp event) event (car event))))
|
||
(setq event-type (intern (concat prefix (symbol-name event-type))))
|
||
(if (symbolp event)
|
||
event-type
|
||
(cons event-type (cdr event)))))))
|
||
|
||
(define-key function-key-map [?\C-x ?@ ?h] 'event-apply-hyper-modifier)
|
||
(define-key function-key-map [?\C-x ?@ ?s] 'event-apply-super-modifier)
|
||
(define-key function-key-map [?\C-x ?@ ?m] 'event-apply-meta-modifier)
|
||
(define-key function-key-map [?\C-x ?@ ?a] 'event-apply-alt-modifier)
|
||
(define-key function-key-map [?\C-x ?@ ?S] 'event-apply-shift-modifier)
|
||
(define-key function-key-map [?\C-x ?@ ?c] 'event-apply-control-modifier)
|
||
|
||
;;;; Keypad support.
|
||
|
||
;; Make the keypad keys act like ordinary typing keys. If people add
|
||
;; bindings for the function key symbols, then those bindings will
|
||
;; override these, so this shouldn't interfere with any existing
|
||
;; bindings.
|
||
|
||
;; Also tell read-char how to handle these keys.
|
||
(mapc
|
||
(lambda (keypad-normal)
|
||
(let ((keypad (nth 0 keypad-normal))
|
||
(normal (nth 1 keypad-normal)))
|
||
(put keypad 'ascii-character normal)
|
||
(define-key function-key-map (vector keypad) (vector normal))))
|
||
;; See also kp-keys bound in bindings.el.
|
||
'((kp-space ?\s)
|
||
(kp-tab ?\t)
|
||
(kp-enter ?\r)
|
||
(kp-separator ?,)
|
||
(kp-equal ?=)
|
||
;; Do the same for various keys that are represented as symbols under
|
||
;; GUIs but naturally correspond to characters.
|
||
(backspace 127)
|
||
(delete 127)
|
||
(tab ?\t)
|
||
(linefeed ?\n)
|
||
(clear ?\C-l)
|
||
(return ?\C-m)
|
||
(escape ?\e)
|
||
))
|
||
|
||
;;;;
|
||
;;;; forking a twin copy of a buffer.
|
||
;;;;
|
||
|
||
(defvar clone-buffer-hook nil
|
||
"Normal hook to run in the new buffer at the end of `clone-buffer'.")
|
||
|
||
(defvar clone-indirect-buffer-hook nil
|
||
"Normal hook to run in the new buffer at the end of `clone-indirect-buffer'.")
|
||
|
||
(defun clone-process (process &optional newname)
|
||
"Create a twin copy of PROCESS.
|
||
If NEWNAME is nil, it defaults to PROCESS' name;
|
||
NEWNAME is modified by adding or incrementing <N> at the end as necessary.
|
||
If PROCESS is associated with a buffer, the new process will be associated
|
||
with the current buffer instead.
|
||
Returns nil if PROCESS has already terminated."
|
||
(setq newname (or newname (process-name process)))
|
||
(if (string-match "<[0-9]+>\\'" newname)
|
||
(setq newname (substring newname 0 (match-beginning 0))))
|
||
(when (memq (process-status process) '(run stop open))
|
||
(let* ((process-connection-type (process-tty-name process))
|
||
(new-process
|
||
(if (memq (process-status process) '(open))
|
||
(let ((args (process-contact process t)))
|
||
(setq args (plist-put args :name newname))
|
||
(setq args (plist-put args :buffer
|
||
(if (process-buffer process)
|
||
(current-buffer))))
|
||
(apply 'make-network-process args))
|
||
(apply 'start-process newname
|
||
(if (process-buffer process) (current-buffer))
|
||
(process-command process)))))
|
||
(set-process-query-on-exit-flag
|
||
new-process (process-query-on-exit-flag process))
|
||
(set-process-inherit-coding-system-flag
|
||
new-process (process-inherit-coding-system-flag process))
|
||
(set-process-filter new-process (process-filter process))
|
||
(set-process-sentinel new-process (process-sentinel process))
|
||
(set-process-plist new-process (copy-sequence (process-plist process)))
|
||
new-process)))
|
||
|
||
;; things to maybe add (currently partly covered by `funcall mode'):
|
||
;; - syntax-table
|
||
;; - overlays
|
||
(defun clone-buffer (&optional newname display-flag)
|
||
"Create and return a twin copy of the current buffer.
|
||
Unlike an indirect buffer, the new buffer can be edited
|
||
independently of the old one (if it is not read-only).
|
||
NEWNAME is the name of the new buffer. It may be modified by
|
||
adding or incrementing <N> at the end as necessary to create a
|
||
unique buffer name. If nil, it defaults to the name of the
|
||
current buffer, with the proper suffix. If DISPLAY-FLAG is
|
||
non-nil, the new buffer is shown with `pop-to-buffer'. Trying to
|
||
clone a file-visiting buffer, or a buffer whose major mode symbol
|
||
has a non-nil `no-clone' property, results in an error.
|
||
|
||
Interactively, DISPLAY-FLAG is t and NEWNAME is the name of the
|
||
current buffer with appropriate suffix. However, if a prefix
|
||
argument is given, then the command prompts for NEWNAME in the
|
||
minibuffer.
|
||
|
||
This runs the normal hook `clone-buffer-hook' in the new buffer
|
||
after it has been set up properly in other respects."
|
||
(interactive
|
||
(progn
|
||
(if buffer-file-name
|
||
(error "Cannot clone a file-visiting buffer"))
|
||
(if (get major-mode 'no-clone)
|
||
(error "Cannot clone a buffer in %s mode" mode-name))
|
||
(list (if current-prefix-arg
|
||
(read-buffer "Name of new cloned buffer: " (current-buffer)))
|
||
t)))
|
||
(if buffer-file-name
|
||
(error "Cannot clone a file-visiting buffer"))
|
||
(if (get major-mode 'no-clone)
|
||
(error "Cannot clone a buffer in %s mode" mode-name))
|
||
(setq newname (or newname (buffer-name)))
|
||
(if (string-match "<[0-9]+>\\'" newname)
|
||
(setq newname (substring newname 0 (match-beginning 0))))
|
||
(let ((buf (current-buffer))
|
||
(ptmin (point-min))
|
||
(ptmax (point-max))
|
||
(pt (point))
|
||
(mk (if mark-active (mark t)))
|
||
(modified (buffer-modified-p))
|
||
(mode major-mode)
|
||
(lvars (buffer-local-variables))
|
||
(process (get-buffer-process (current-buffer)))
|
||
(new (generate-new-buffer (or newname (buffer-name)))))
|
||
(save-restriction
|
||
(widen)
|
||
(with-current-buffer new
|
||
(insert-buffer-substring buf)))
|
||
(with-current-buffer new
|
||
(narrow-to-region ptmin ptmax)
|
||
(goto-char pt)
|
||
(if mk (set-mark mk))
|
||
(set-buffer-modified-p modified)
|
||
|
||
;; Clone the old buffer's process, if any.
|
||
(when process (clone-process process))
|
||
|
||
;; Now set up the major mode.
|
||
(funcall mode)
|
||
|
||
;; Set up other local variables.
|
||
(mapc (lambda (v)
|
||
(condition-case () ;in case var is read-only
|
||
(if (symbolp v)
|
||
(makunbound v)
|
||
(set (make-local-variable (car v)) (cdr v)))
|
||
(error nil)))
|
||
lvars)
|
||
|
||
;; Run any hooks (typically set up by the major mode
|
||
;; for cloning to work properly).
|
||
(run-hooks 'clone-buffer-hook))
|
||
(if display-flag
|
||
;; Presumably the current buffer is shown in the selected frame, so
|
||
;; we want to display the clone elsewhere.
|
||
(let ((same-window-regexps nil)
|
||
(same-window-buffer-names))
|
||
(pop-to-buffer new)))
|
||
new))
|
||
|
||
|
||
(defun clone-indirect-buffer (newname display-flag &optional norecord)
|
||
"Create an indirect buffer that is a twin copy of the current buffer.
|
||
|
||
Give the indirect buffer name NEWNAME. Interactively, read NEWNAME
|
||
from the minibuffer when invoked with a prefix arg. If NEWNAME is nil
|
||
or if not called with a prefix arg, NEWNAME defaults to the current
|
||
buffer's name. The name is modified by adding a `<N>' suffix to it
|
||
or by incrementing the N in an existing suffix. Trying to clone a
|
||
buffer whose major mode symbol has a non-nil `no-clone-indirect'
|
||
property results in an error.
|
||
|
||
DISPLAY-FLAG non-nil means show the new buffer with `pop-to-buffer'.
|
||
This is always done when called interactively.
|
||
|
||
Optional third arg NORECORD non-nil means do not put this buffer at the
|
||
front of the list of recently selected ones.
|
||
|
||
Returns the newly created indirect buffer."
|
||
(interactive
|
||
(progn
|
||
(if (get major-mode 'no-clone-indirect)
|
||
(error "Cannot indirectly clone a buffer in %s mode" mode-name))
|
||
(list (if current-prefix-arg
|
||
(read-buffer "Name of indirect buffer: " (current-buffer)))
|
||
t)))
|
||
(if (get major-mode 'no-clone-indirect)
|
||
(error "Cannot indirectly clone a buffer in %s mode" mode-name))
|
||
(setq newname (or newname (buffer-name)))
|
||
(if (string-match "<[0-9]+>\\'" newname)
|
||
(setq newname (substring newname 0 (match-beginning 0))))
|
||
(let* ((name (generate-new-buffer-name newname))
|
||
(buffer (make-indirect-buffer (current-buffer) name t)))
|
||
(with-current-buffer buffer
|
||
(run-hooks 'clone-indirect-buffer-hook))
|
||
(when display-flag
|
||
(pop-to-buffer buffer norecord))
|
||
buffer))
|
||
|
||
|
||
(defun clone-indirect-buffer-other-window (newname display-flag &optional norecord)
|
||
"Like `clone-indirect-buffer' but display in another window."
|
||
(interactive
|
||
(progn
|
||
(if (get major-mode 'no-clone-indirect)
|
||
(error "Cannot indirectly clone a buffer in %s mode" mode-name))
|
||
(list (if current-prefix-arg
|
||
(read-buffer "Name of indirect buffer: " (current-buffer)))
|
||
t)))
|
||
(let ((pop-up-windows t))
|
||
(clone-indirect-buffer newname display-flag norecord)))
|
||
|
||
|
||
;;; Handling of Backspace and Delete keys.
|
||
|
||
(defcustom normal-erase-is-backspace 'maybe
|
||
"Set the default behavior of the Delete and Backspace keys.
|
||
|
||
If set to t, Delete key deletes forward and Backspace key deletes
|
||
backward.
|
||
|
||
If set to nil, both Delete and Backspace keys delete backward.
|
||
|
||
If set to 'maybe (which is the default), Emacs automatically
|
||
selects a behavior. On window systems, the behavior depends on
|
||
the keyboard used. If the keyboard has both a Backspace key and
|
||
a Delete key, and both are mapped to their usual meanings, the
|
||
option's default value is set to t, so that Backspace can be used
|
||
to delete backward, and Delete can be used to delete forward.
|
||
|
||
If not running under a window system, customizing this option
|
||
accomplishes a similar effect by mapping C-h, which is usually
|
||
generated by the Backspace key, to DEL, and by mapping DEL to C-d
|
||
via `keyboard-translate'. The former functionality of C-h is
|
||
available on the F1 key. You should probably not use this
|
||
setting if you don't have both Backspace, Delete and F1 keys.
|
||
|
||
Setting this variable with setq doesn't take effect. Programmatically,
|
||
call `normal-erase-is-backspace-mode' (which see) instead."
|
||
:type '(choice (const :tag "Off" nil)
|
||
(const :tag "Maybe" maybe)
|
||
(other :tag "On" t))
|
||
:group 'editing-basics
|
||
:version "21.1"
|
||
:set (lambda (symbol value)
|
||
;; The fboundp is because of a problem with :set when
|
||
;; dumping Emacs. It doesn't really matter.
|
||
(if (fboundp 'normal-erase-is-backspace-mode)
|
||
(normal-erase-is-backspace-mode (or value 0))
|
||
(set-default symbol value))))
|
||
|
||
(defun normal-erase-is-backspace-setup-frame (&optional frame)
|
||
"Set up `normal-erase-is-backspace-mode' on FRAME, if necessary."
|
||
(unless frame (setq frame (selected-frame)))
|
||
(with-selected-frame frame
|
||
(unless (terminal-parameter nil 'normal-erase-is-backspace)
|
||
(normal-erase-is-backspace-mode
|
||
(if (if (eq normal-erase-is-backspace 'maybe)
|
||
(and (not noninteractive)
|
||
(or (memq system-type '(ms-dos windows-nt))
|
||
(memq window-system '(w32 ns))
|
||
(and (memq window-system '(x))
|
||
(fboundp 'x-backspace-delete-keys-p)
|
||
(x-backspace-delete-keys-p))
|
||
;; If the terminal Emacs is running on has erase char
|
||
;; set to ^H, use the Backspace key for deleting
|
||
;; backward, and the Delete key for deleting forward.
|
||
(and (null window-system)
|
||
(eq tty-erase-char ?\^H))))
|
||
normal-erase-is-backspace)
|
||
1 0)))))
|
||
|
||
(define-minor-mode normal-erase-is-backspace-mode
|
||
"Toggle the Erase and Delete mode of the Backspace and Delete keys.
|
||
With a prefix argument ARG, enable this feature if ARG is
|
||
positive, and disable it otherwise. If called from Lisp, enable
|
||
the mode if ARG is omitted or nil.
|
||
|
||
On window systems, when this mode is on, Delete is mapped to C-d
|
||
and Backspace is mapped to DEL; when this mode is off, both
|
||
Delete and Backspace are mapped to DEL. (The remapping goes via
|
||
`local-function-key-map', so binding Delete or Backspace in the
|
||
global or local keymap will override that.)
|
||
|
||
In addition, on window systems, the bindings of C-Delete, M-Delete,
|
||
C-M-Delete, C-Backspace, M-Backspace, and C-M-Backspace are changed in
|
||
the global keymap in accordance with the functionality of Delete and
|
||
Backspace. For example, if Delete is remapped to C-d, which deletes
|
||
forward, C-Delete is bound to `kill-word', but if Delete is remapped
|
||
to DEL, which deletes backward, C-Delete is bound to
|
||
`backward-kill-word'.
|
||
|
||
If not running on a window system, a similar effect is accomplished by
|
||
remapping C-h (normally produced by the Backspace key) and DEL via
|
||
`keyboard-translate': if this mode is on, C-h is mapped to DEL and DEL
|
||
to C-d; if it's off, the keys are not remapped.
|
||
|
||
When not running on a window system, and this mode is turned on, the
|
||
former functionality of C-h is available on the F1 key. You should
|
||
probably not turn on this mode on a text-only terminal if you don't
|
||
have both Backspace, Delete and F1 keys.
|
||
|
||
See also `normal-erase-is-backspace'."
|
||
:variable ((eq (terminal-parameter nil 'normal-erase-is-backspace) 1)
|
||
. (lambda (v)
|
||
(setf (terminal-parameter nil 'normal-erase-is-backspace)
|
||
(if v 1 0))))
|
||
(let ((enabled (eq 1 (terminal-parameter
|
||
nil 'normal-erase-is-backspace))))
|
||
|
||
(cond ((or (memq window-system '(x w32 ns pc))
|
||
(memq system-type '(ms-dos windows-nt)))
|
||
(let ((bindings
|
||
`(([M-delete] [M-backspace])
|
||
([C-M-delete] [C-M-backspace])
|
||
([?\e C-delete] [?\e C-backspace]))))
|
||
|
||
(if enabled
|
||
(progn
|
||
(define-key local-function-key-map [delete] [deletechar])
|
||
(define-key local-function-key-map [kp-delete] [deletechar])
|
||
(define-key local-function-key-map [backspace] [?\C-?])
|
||
(dolist (b bindings)
|
||
;; Not sure if input-decode-map is really right, but
|
||
;; keyboard-translate-table (used below) only works
|
||
;; for integer events, and key-translation-table is
|
||
;; global (like the global-map, used earlier).
|
||
(define-key input-decode-map (car b) nil)
|
||
(define-key input-decode-map (cadr b) nil)))
|
||
(define-key local-function-key-map [delete] [?\C-?])
|
||
(define-key local-function-key-map [kp-delete] [?\C-?])
|
||
(define-key local-function-key-map [backspace] [?\C-?])
|
||
(dolist (b bindings)
|
||
(define-key input-decode-map (car b) (cadr b))
|
||
(define-key input-decode-map (cadr b) (car b))))))
|
||
(t
|
||
(if enabled
|
||
(progn
|
||
(keyboard-translate ?\C-h ?\C-?)
|
||
(keyboard-translate ?\C-? ?\C-d))
|
||
(keyboard-translate ?\C-h ?\C-h)
|
||
(keyboard-translate ?\C-? ?\C-?))))
|
||
|
||
(if (called-interactively-p 'interactive)
|
||
(message "Delete key deletes %s"
|
||
(if (eq 1 (terminal-parameter nil 'normal-erase-is-backspace))
|
||
"forward" "backward")))))
|
||
|
||
(defvar vis-mode-saved-buffer-invisibility-spec nil
|
||
"Saved value of `buffer-invisibility-spec' when Visible mode is on.")
|
||
|
||
(define-minor-mode read-only-mode
|
||
"Change whether the current buffer is read-only.
|
||
With prefix argument ARG, make the buffer read-only if ARG is
|
||
positive, otherwise make it writable. If buffer is read-only
|
||
and `view-read-only' is non-nil, enter view mode.
|
||
|
||
Do not call this from a Lisp program unless you really intend to
|
||
do the same thing as the \\[read-only-mode] command, including
|
||
possibly enabling or disabling View mode. Also, note that this
|
||
command works by setting the variable `buffer-read-only', which
|
||
does not affect read-only regions caused by text properties. To
|
||
ignore read-only status in a Lisp program (whether due to text
|
||
properties or buffer state), bind `inhibit-read-only' temporarily
|
||
to a non-nil value."
|
||
:variable buffer-read-only
|
||
(cond
|
||
((and (not buffer-read-only) view-mode)
|
||
(View-exit-and-edit)
|
||
(make-local-variable 'view-read-only)
|
||
(setq view-read-only t)) ; Must leave view mode.
|
||
((and buffer-read-only view-read-only
|
||
;; If view-mode is already active, `view-mode-enter' is a nop.
|
||
(not view-mode)
|
||
(not (eq (get major-mode 'mode-class) 'special)))
|
||
(view-mode-enter))))
|
||
|
||
(define-minor-mode visible-mode
|
||
"Toggle making all invisible text temporarily visible (Visible mode).
|
||
With a prefix argument ARG, enable Visible mode if ARG is
|
||
positive, and disable it otherwise. If called from Lisp, enable
|
||
the mode if ARG is omitted or nil.
|
||
|
||
This mode works by saving the value of `buffer-invisibility-spec'
|
||
and setting it to nil."
|
||
:lighter " Vis"
|
||
:group 'editing-basics
|
||
(when (local-variable-p 'vis-mode-saved-buffer-invisibility-spec)
|
||
(setq buffer-invisibility-spec vis-mode-saved-buffer-invisibility-spec)
|
||
(kill-local-variable 'vis-mode-saved-buffer-invisibility-spec))
|
||
(when visible-mode
|
||
(set (make-local-variable 'vis-mode-saved-buffer-invisibility-spec)
|
||
buffer-invisibility-spec)
|
||
(setq buffer-invisibility-spec nil)))
|
||
|
||
(defvar messages-buffer-mode-map
|
||
(let ((map (make-sparse-keymap)))
|
||
(set-keymap-parent map special-mode-map)
|
||
(define-key map "g" nil) ; nothing to revert
|
||
map))
|
||
|
||
(define-derived-mode messages-buffer-mode special-mode "Messages"
|
||
"Major mode used in the \"*Messages*\" buffer.")
|
||
|
||
(defun messages-buffer ()
|
||
"Return the \"*Messages*\" buffer.
|
||
If it does not exist, create and it switch it to `messages-buffer-mode'."
|
||
(or (get-buffer "*Messages*")
|
||
(with-current-buffer (get-buffer-create "*Messages*")
|
||
(messages-buffer-mode)
|
||
(current-buffer))))
|
||
|
||
|
||
;; Minibuffer prompt stuff.
|
||
|
||
;;(defun minibuffer-prompt-modification (start end)
|
||
;; (error "You cannot modify the prompt"))
|
||
;;
|
||
;;
|
||
;;(defun minibuffer-prompt-insertion (start end)
|
||
;; (let ((inhibit-modification-hooks t))
|
||
;; (delete-region start end)
|
||
;; ;; Discard undo information for the text insertion itself
|
||
;; ;; and for the text deletion.above.
|
||
;; (when (consp buffer-undo-list)
|
||
;; (setq buffer-undo-list (cddr buffer-undo-list)))
|
||
;; (message "You cannot modify the prompt")))
|
||
;;
|
||
;;
|
||
;;(setq minibuffer-prompt-properties
|
||
;; (list 'modification-hooks '(minibuffer-prompt-modification)
|
||
;; 'insert-in-front-hooks '(minibuffer-prompt-insertion)))
|
||
|
||
|
||
;;;; Problematic external packages.
|
||
|
||
;; rms says this should be done by specifying symbols that define
|
||
;; versions together with bad values. This is therefore not as
|
||
;; flexible as it could be. See the thread:
|
||
;; http://lists.gnu.org/archive/html/emacs-devel/2007-08/msg00300.html
|
||
(defconst bad-packages-alist
|
||
;; Not sure exactly which semantic versions have problems.
|
||
;; Definitely 2.0pre3, probably all 2.0pre's before this.
|
||
'((semantic semantic-version "\\`2\\.0pre[1-3]\\'"
|
||
"The version of `semantic' loaded does not work in Emacs 22.
|
||
It can cause constant high CPU load.
|
||
Upgrade to at least Semantic 2.0pre4 (distributed with CEDET 1.0pre4).")
|
||
;; CUA-mode does not work with GNU Emacs version 22.1 and newer.
|
||
;; Except for version 1.2, all of the 1.x and 2.x version of cua-mode
|
||
;; provided the `CUA-mode' feature. Since this is no longer true,
|
||
;; we can warn the user if the `CUA-mode' feature is ever provided.
|
||
(CUA-mode t nil
|
||
"CUA-mode is now part of the standard GNU Emacs distribution,
|
||
so you can now enable CUA via the Options menu or by customizing `cua-mode'.
|
||
|
||
You have loaded an older version of CUA-mode which does not work
|
||
correctly with this version of Emacs. You should remove the old
|
||
version and use the one distributed with Emacs."))
|
||
"Alist of packages known to cause problems in this version of Emacs.
|
||
Each element has the form (PACKAGE SYMBOL REGEXP STRING).
|
||
PACKAGE is either a regular expression to match file names, or a
|
||
symbol (a feature name), like for `with-eval-after-load'.
|
||
SYMBOL is either the name of a string variable, or t. Upon
|
||
loading PACKAGE, if SYMBOL is t or matches REGEXP, display a
|
||
warning using STRING as the message.")
|
||
|
||
(defun bad-package-check (package)
|
||
"Run a check using the element from `bad-packages-alist' matching PACKAGE."
|
||
(condition-case nil
|
||
(let* ((list (assoc package bad-packages-alist))
|
||
(symbol (nth 1 list)))
|
||
(and list
|
||
(boundp symbol)
|
||
(or (eq symbol t)
|
||
(and (stringp (setq symbol (eval symbol)))
|
||
(string-match-p (nth 2 list) symbol)))
|
||
(display-warning package (nth 3 list) :warning)))
|
||
(error nil)))
|
||
|
||
(dolist (elem bad-packages-alist)
|
||
(let ((pkg (car elem)))
|
||
(with-eval-after-load pkg
|
||
(bad-package-check pkg))))
|
||
|
||
|
||
;;; Generic dispatcher commands
|
||
|
||
;; Macro `define-alternatives' is used to create generic commands.
|
||
;; Generic commands are these (like web, mail, news, encrypt, irc, etc.)
|
||
;; that can have different alternative implementations where choosing
|
||
;; among them is exclusively a matter of user preference.
|
||
|
||
;; (define-alternatives COMMAND) creates a new interactive command
|
||
;; M-x COMMAND and a customizable variable COMMAND-alternatives.
|
||
;; Typically, the user will not need to customize this variable; packages
|
||
;; wanting to add alternative implementations should use
|
||
;;
|
||
;; ;;;###autoload (push '("My impl name" . my-impl-symbol) COMMAND-alternatives
|
||
|
||
(defmacro define-alternatives (command &rest customizations)
|
||
"Define the new command `COMMAND'.
|
||
|
||
The argument `COMMAND' should be a symbol.
|
||
|
||
Running `M-x COMMAND RET' for the first time prompts for which
|
||
alternative to use and records the selected command as a custom
|
||
variable.
|
||
|
||
Running `C-u M-x COMMAND RET' prompts again for an alternative
|
||
and overwrites the previous choice.
|
||
|
||
The variable `COMMAND-alternatives' contains an alist with
|
||
alternative implementations of COMMAND. `define-alternatives'
|
||
does not have any effect until this variable is set.
|
||
|
||
CUSTOMIZATIONS, if non-nil, should be composed of alternating
|
||
`defcustom' keywords and values to add to the declaration of
|
||
`COMMAND-alternatives' (typically :group and :version)."
|
||
(let* ((command-name (symbol-name command))
|
||
(varalt-name (concat command-name "-alternatives"))
|
||
(varalt-sym (intern varalt-name))
|
||
(varimp-sym (intern (concat command-name "--implementation"))))
|
||
`(progn
|
||
|
||
(defcustom ,varalt-sym nil
|
||
,(format "Alist of alternative implementations for the `%s' command.
|
||
|
||
Each entry must be a pair (ALTNAME . ALTFUN), where:
|
||
ALTNAME - The name shown at user to describe the alternative implementation.
|
||
ALTFUN - The function called to implement this alternative."
|
||
command-name)
|
||
:type '(alist :key-type string :value-type function)
|
||
,@customizations)
|
||
|
||
(put ',varalt-sym 'definition-name ',command)
|
||
(defvar ,varimp-sym nil "Internal use only.")
|
||
|
||
(defun ,command (&optional arg)
|
||
,(format "Run generic command `%s'.
|
||
If used for the first time, or with interactive ARG, ask the user which
|
||
implementation to use for `%s'. The variable `%s'
|
||
contains the list of implementations currently supported for this command."
|
||
command-name command-name varalt-name)
|
||
(interactive "P")
|
||
(when (or arg (null ,varimp-sym))
|
||
(let ((val (completing-read
|
||
,(format-message
|
||
"Select implementation for command `%s': "
|
||
command-name)
|
||
,varalt-sym nil t)))
|
||
(unless (string-equal val "")
|
||
(when (null ,varimp-sym)
|
||
(message
|
||
"Use C-u M-x %s RET`to select another implementation"
|
||
,command-name)
|
||
(sit-for 3))
|
||
(customize-save-variable ',varimp-sym
|
||
(cdr (assoc-string val ,varalt-sym))))))
|
||
(if ,varimp-sym
|
||
(call-interactively ,varimp-sym)
|
||
(message "%s" ,(format-message
|
||
"No implementation selected for command `%s'"
|
||
command-name)))))))
|
||
|
||
|
||
;;; Functions for changing capitalization that Do What I Mean
|
||
(defun upcase-dwim (arg)
|
||
"Upcase words in the region, if active; if not, upcase word at point.
|
||
If the region is active, this function calls `upcase-region'.
|
||
Otherwise, it calls `upcase-word', with prefix argument passed to it
|
||
to upcase ARG words."
|
||
(interactive "*p")
|
||
(if (use-region-p)
|
||
(upcase-region (region-beginning) (region-end))
|
||
(upcase-word arg)))
|
||
|
||
(defun downcase-dwim (arg)
|
||
"Downcase words in the region, if active; if not, downcase word at point.
|
||
If the region is active, this function calls `downcase-region'.
|
||
Otherwise, it calls `downcase-word', with prefix argument passed to it
|
||
to downcase ARG words."
|
||
(interactive "*p")
|
||
(if (use-region-p)
|
||
(downcase-region (region-beginning) (region-end))
|
||
(downcase-word arg)))
|
||
|
||
(defun capitalize-dwim (arg)
|
||
"Capitalize words in the region, if active; if not, capitalize word at point.
|
||
If the region is active, this function calls `capitalize-region'.
|
||
Otherwise, it calls `capitalize-word', with prefix argument passed to it
|
||
to capitalize ARG words."
|
||
(interactive "*p")
|
||
(if (use-region-p)
|
||
(capitalize-region (region-beginning) (region-end))
|
||
(capitalize-word arg)))
|
||
|
||
|
||
|
||
(provide 'simple)
|
||
|
||
;;; simple.el ends here
|