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2383 lines
85 KiB
EmacsLisp
2383 lines
85 KiB
EmacsLisp
;;; simple.el --- basic editing commands for Emacs
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;; Copyright (C) 1985, 1986, 1987, 1993, 1994 Free Software Foundation, Inc.
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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 2, or (at your option)
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;; 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; see the file COPYING. If not, write to
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;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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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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(defun open-line (arg)
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"Insert a newline and leave point before it.
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If there is a fill prefix, insert the fill prefix on the new line
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if the line would have been empty.
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With arg N, insert N newlines."
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(interactive "*p")
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(let* ((do-fill-prefix (and fill-prefix (bolp)))
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(flag (and (null do-fill-prefix) (bolp) (not (bobp)))))
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;; If this is a simple case, and we are at the beginning of a line,
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;; actually insert the newline *before* the preceding newline
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;; instead of after. That makes better display behavior.
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(if flag
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(progn
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;; If undo is enabled, don't let this hack be visible:
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;; record the real value of point as the place to move back to
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;; if we undo this insert.
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(if (not (eq buffer-undo-list t))
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(setq buffer-undo-list (cons (point) buffer-undo-list)))
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(forward-char -1)))
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(save-excursion
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(while (> arg 0)
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(if do-fill-prefix (insert fill-prefix))
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(insert ?\n)
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(setq arg (1- arg))))
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(end-of-line)
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(if flag (forward-char 1))))
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(defun split-line ()
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"Split current line, moving portion beyond point vertically down."
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(interactive "*")
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(skip-chars-forward " \t")
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(let ((col (current-column))
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(pos (point)))
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(insert ?\n)
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(indent-to col 0)
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(goto-char pos)))
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(defun quoted-insert (arg)
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"Read next input character and insert it.
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This is useful for inserting control characters.
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You may also type up to 3 octal digits, to insert a character with that code.
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In overwrite mode, this function inserts the character anyway, and
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does not handle octal digits specially. This means that if you use
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overwrite as your normal editing mode, you can use this function to
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insert characters when necessary.
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In binary overwrite mode, this function does overwrite, and octal
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digits are interpreted as a character code. This is supposed to make
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this function useful in editing binary files."
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(interactive "*p")
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(let ((char (if (or (not overwrite-mode)
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(eq overwrite-mode 'overwrite-mode-binary))
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(read-quoted-char)
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(read-char))))
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(if (eq overwrite-mode 'overwrite-mode-binary)
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(delete-char arg))
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(insert-char char arg)))
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(defun delete-indentation (&optional arg)
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"Join this line to previous and fix up whitespace at join.
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If there is a fill prefix, delete it from the beginning of this line.
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With argument, join this line to following line."
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(interactive "*P")
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(beginning-of-line)
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(if arg (forward-line 1))
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(if (eq (preceding-char) ?\n)
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(progn
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(delete-region (point) (1- (point)))
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;; If the second line started with the fill prefix,
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;; delete the prefix.
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(if (and fill-prefix
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(<= (+ (point) (length fill-prefix)) (point-max))
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(string= fill-prefix
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(buffer-substring (point)
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(+ (point) (length fill-prefix)))))
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(delete-region (point) (+ (point) (length fill-prefix))))
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(fixup-whitespace))))
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(defun fixup-whitespace ()
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"Fixup white space between objects around point.
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Leave one space or none, according to the context."
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(interactive "*")
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(save-excursion
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(delete-horizontal-space)
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(if (or (looking-at "^\\|\\s)")
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(save-excursion (forward-char -1)
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(looking-at "$\\|\\s(\\|\\s'")))
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nil
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(insert ?\ ))))
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(defun delete-horizontal-space ()
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"Delete all spaces and tabs around point."
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(interactive "*")
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(skip-chars-backward " \t")
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(delete-region (point) (progn (skip-chars-forward " \t") (point))))
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(defun just-one-space ()
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"Delete all spaces and tabs around point, leaving one space."
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(interactive "*")
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(skip-chars-backward " \t")
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(if (= (following-char) ? )
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(forward-char 1)
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(insert ? ))
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(delete-region (point) (progn (skip-chars-forward " \t") (point))))
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(defun delete-blank-lines ()
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"On blank line, delete all surrounding blank lines, leaving just one.
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On isolated blank line, delete that one.
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On nonblank line, delete all blank lines that follow it."
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(interactive "*")
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(let (thisblank singleblank)
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(save-excursion
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(beginning-of-line)
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(setq thisblank (looking-at "[ \t]*$"))
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;; Set singleblank if there is just one blank line here.
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(setq singleblank
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(and thisblank
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(not (looking-at "[ \t]*\n[ \t]*$"))
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(or (bobp)
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(progn (forward-line -1)
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(not (looking-at "[ \t]*$")))))))
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;; Delete preceding blank lines, and this one too if it's the only one.
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(if thisblank
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(progn
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(beginning-of-line)
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(if singleblank (forward-line 1))
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(delete-region (point)
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(if (re-search-backward "[^ \t\n]" nil t)
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(progn (forward-line 1) (point))
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(point-min)))))
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;; Delete following blank lines, unless the current line is blank
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;; and there are no following blank lines.
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(if (not (and thisblank singleblank))
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(save-excursion
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(end-of-line)
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(forward-line 1)
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(delete-region (point)
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(if (re-search-forward "[^ \t\n]" nil t)
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(progn (beginning-of-line) (point))
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(point-max)))))
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;; Handle the special case where point is followed by newline and eob.
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;; Delete the line, leaving point at eob.
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(if (looking-at "^[ \t]*\n\\'")
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(delete-region (point) (point-max)))))
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(defun back-to-indentation ()
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"Move point to the first non-whitespace character on this line."
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(interactive)
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(beginning-of-line 1)
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(skip-chars-forward " \t"))
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(defun newline-and-indent ()
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"Insert a newline, then indent according to major mode.
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Indentation is done using the value of `indent-line-function'.
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In programming language modes, this is the same as TAB.
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In some text modes, where TAB inserts a tab, this command indents to the
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column specified by the variable `left-margin'."
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(interactive "*")
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(delete-region (point) (progn (skip-chars-backward " \t") (point)))
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(newline)
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(indent-according-to-mode))
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(defun reindent-then-newline-and-indent ()
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"Reindent current line, insert newline, then indent the new line.
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Indentation of both lines is done according to the current major mode,
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which means calling the current value of `indent-line-function'.
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In programming language modes, this is the same as TAB.
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In some text modes, where TAB inserts a tab, this indents to the
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column specified by the variable `left-margin'."
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(interactive "*")
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(save-excursion
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(delete-region (point) (progn (skip-chars-backward " \t") (point)))
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(indent-according-to-mode))
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(newline)
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(indent-according-to-mode))
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;; Internal subroutine of delete-char
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(defun kill-forward-chars (arg)
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(if (listp arg) (setq arg (car arg)))
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(if (eq arg '-) (setq arg -1))
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(kill-region (point) (+ (point) arg)))
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;; Internal subroutine of backward-delete-char
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(defun kill-backward-chars (arg)
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(if (listp arg) (setq arg (car arg)))
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(if (eq arg '-) (setq arg -1))
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(kill-region (point) (- (point) arg)))
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(defun backward-delete-char-untabify (arg &optional killp)
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"Delete characters backward, changing tabs into spaces.
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Delete ARG chars, and kill (save in kill ring) if KILLP is non-nil.
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Interactively, ARG is the prefix arg (default 1)
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and KILLP is t if prefix arg is was specified."
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(interactive "*p\nP")
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(let ((count arg))
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(save-excursion
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(while (and (> count 0) (not (bobp)))
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(if (= (preceding-char) ?\t)
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(let ((col (current-column)))
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(forward-char -1)
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(setq col (- col (current-column)))
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(insert-char ?\ col)
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(delete-char 1)))
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(forward-char -1)
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(setq count (1- count)))))
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(delete-backward-char arg killp)
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;; In overwrite mode, back over columns while clearing them out,
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;; unless at end of line.
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(and overwrite-mode (not (eolp))
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(save-excursion (insert-char ?\ arg))))
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(defun zap-to-char (arg char)
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"Kill up to and including ARG'th occurrence of CHAR.
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Goes backward if ARG is negative; error if CHAR not found."
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(interactive "p\ncZap to char: ")
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(kill-region (point) (progn
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(search-forward (char-to-string char) nil nil arg)
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; (goto-char (if (> arg 0) (1- (point)) (1+ (point))))
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(point))))
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(defun beginning-of-buffer (&optional arg)
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"Move point to the beginning of the buffer; leave mark at previous position.
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With arg N, put point N/10 of the way from the true beginning.
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Don't use this command in Lisp programs!
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\(goto-char (point-min)) is faster and avoids clobbering the mark."
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(interactive "P")
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(push-mark)
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(goto-char (if arg
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(if (> (buffer-size) 10000)
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;; Avoid overflow for large buffer sizes!
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(* (prefix-numeric-value arg)
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(/ (buffer-size) 10))
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(/ (+ 10 (* (buffer-size) (prefix-numeric-value arg))) 10))
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(point-min)))
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(if arg (forward-line 1)))
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(defun end-of-buffer (&optional arg)
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"Move point to the end of the buffer; leave mark at previous position.
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With arg N, put point N/10 of the way from the true end.
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Don't use this command in Lisp programs!
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\(goto-char (point-max)) is faster and avoids clobbering the mark."
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(interactive "P")
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(push-mark)
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(goto-char (if arg
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(- (1+ (buffer-size))
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(if (> (buffer-size) 10000)
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;; Avoid overflow for large buffer sizes!
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(* (prefix-numeric-value arg)
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(/ (buffer-size) 10))
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(/ (* (buffer-size) (prefix-numeric-value arg)) 10)))
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(point-max)))
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;; If we went to a place in the middle of the buffer,
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;; adjust it to the beginning of a line.
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(if arg (forward-line 1)
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;; If the end of the buffer is not already on the screen,
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;; then scroll specially to put it near, but not at, the bottom.
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(if (let ((old-point (point)))
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(save-excursion
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(goto-char (window-start))
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(vertical-motion (window-height))
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(< (point) old-point)))
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(recenter -3))))
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(defun mark-whole-buffer ()
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"Put point at beginning and mark at end of buffer.
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You probably should not use this function in Lisp programs;
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it is usually a mistake for a Lisp function to use any subroutine
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that uses or sets the mark."
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(interactive)
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(push-mark (point))
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(push-mark (point-max) nil t)
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(goto-char (point-min)))
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(defun count-lines-region (start end)
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"Print number of lines and characters in the region."
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(interactive "r")
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(message "Region has %d lines, %d characters"
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(count-lines start end) (- end start)))
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(defun what-line ()
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"Print the current line number (in the buffer) of point."
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(interactive)
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(save-restriction
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(widen)
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(save-excursion
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(beginning-of-line)
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(message "Line %d"
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(1+ (count-lines 1 (point)))))))
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(defun count-lines (start end)
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"Return number of lines between START and END.
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This is usually the number of newlines between them,
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but can be one more if START is not equal to END
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and the greater of them is not at the start of a line."
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(save-match-data
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(save-excursion
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(save-restriction
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(narrow-to-region start end)
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(goto-char (point-min))
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(if (eq selective-display t)
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(let ((done 0))
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(while (re-search-forward "[\n\C-m]" nil t 40)
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(setq done (+ 40 done)))
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(while (re-search-forward "[\n\C-m]" nil t 1)
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(setq done (+ 1 done)))
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(goto-char (point-max))
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(if (and (/= start end)
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(not (bolp)))
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(1+ done)
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done))
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(- (buffer-size) (forward-line (buffer-size))))))))
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(defun what-cursor-position ()
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"Print info on cursor position (on screen and within buffer)."
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(interactive)
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(let* ((char (following-char))
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(beg (point-min))
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(end (point-max))
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(pos (point))
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(total (buffer-size))
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(percent (if (> total 50000)
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;; Avoid overflow from multiplying by 100!
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(/ (+ (/ total 200) (1- pos)) (max (/ total 100) 1))
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(/ (+ (/ total 2) (* 100 (1- pos))) (max total 1))))
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(hscroll (if (= (window-hscroll) 0)
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""
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(format " Hscroll=%d" (window-hscroll))))
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(col (current-column)))
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(if (= pos end)
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(if (or (/= beg 1) (/= end (1+ total)))
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(message "point=%d of %d(%d%%) <%d - %d> column %d %s"
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pos total percent beg end col hscroll)
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(message "point=%d of %d(%d%%) column %d %s"
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pos total percent col hscroll))
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(if (or (/= beg 1) (/= end (1+ total)))
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(message "Char: %s (0%o) point=%d of %d(%d%%) <%d - %d> column %d %s"
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(single-key-description char) char pos total percent beg end col hscroll)
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(message "Char: %s (0%o) point=%d of %d(%d%%) column %d %s"
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(single-key-description char) char pos total percent col hscroll)))))
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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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(defvar read-expression-map (cons 'keymap minibuffer-local-map)
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"Minibuffer keymap used for reading Lisp expressions.")
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(define-key read-expression-map "\M-\t" 'lisp-complete-symbol)
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(put 'eval-expression 'disabled t)
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(defvar read-expression-history nil)
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;; We define this, rather than making `eval' interactive,
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;; for the sake of completion of names like eval-region, eval-current-buffer.
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(defun eval-expression (expression)
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"Evaluate EXPRESSION and print value in minibuffer.
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Value is also consed on to front of the variable `values'."
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(interactive
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(list (read-from-minibuffer "Eval: "
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nil read-expression-map t
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'read-expression-history)))
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(setq values (cons (eval expression) values))
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(prin1 (car values) t))
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(defun edit-and-eval-command (prompt command)
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"Prompting with PROMPT, let user edit COMMAND and eval result.
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COMMAND is a Lisp expression. Let user edit that expression in
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the minibuffer, then read and evaluate the result."
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(let ((command (read-from-minibuffer prompt
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(prin1-to-string command)
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read-expression-map t
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'(command-history . 1))))
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(eval command)))
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(defun repeat-complex-command (arg)
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"Edit and re-evaluate last complex command, or ARGth from last.
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A complex command is one which used the minibuffer.
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The command is placed in the minibuffer as a Lisp form for editing.
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The result is executed, repeating the command as changed.
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If the command has been changed or is not the most recent previous command
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it is added to the front of the command history.
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You can use the minibuffer history commands \\<minibuffer-local-map>\\[next-history-element] and \\[previous-history-element]
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to get different commands to edit and resubmit."
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(interactive "p")
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(let ((elt (nth (1- arg) command-history))
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(minibuffer-history-position arg)
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(minibuffer-history-sexp-flag t)
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newcmd)
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(if elt
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(progn
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(setq newcmd
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(read-from-minibuffer
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"Redo: " (prin1-to-string elt) read-expression-map t
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(cons 'command-history arg)))
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;; If command was added to command-history as a string,
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;; get rid of that. We want only evallable expressions there.
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(if (stringp (car command-history))
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(setq command-history (cdr command-history)))
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;; If command to be redone does not match front of history,
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;; add it to the history.
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(or (equal newcmd (car command-history))
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(setq command-history (cons newcmd command-history)))
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(eval newcmd))
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(ding))))
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(defvar minibuffer-history nil
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"Default minibuffer history list.
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This is used for all minibuffer input
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except when an alternate history list is specified.")
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(defvar minibuffer-history-sexp-flag nil
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"Nonzero when doing history operations on `command-history'.
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More generally, indicates that the history list being acted on
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contains expressions rather than strings.")
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(setq minibuffer-history-variable 'minibuffer-history)
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(setq minibuffer-history-position nil)
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(defvar minibuffer-history-search-history nil)
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(mapcar
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(lambda (key-and-command)
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(mapcar
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(lambda (keymap-and-completionp)
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;; Arg is (KEYMAP-SYMBOL . COMPLETION-MAP-P).
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;; If the cdr of KEY-AND-COMMAND (the command) is a cons,
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||
;; its car is used if COMPLETION-MAP-P is nil, its cdr if it is t.
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||
(define-key (symbol-value (car keymap-and-completionp))
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(car key-and-command)
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||
(let ((command (cdr key-and-command)))
|
||
(if (consp command)
|
||
;; (and ... nil) => ... turns back on the completion-oriented
|
||
;; history commands which rms turned off since they seem to
|
||
;; do things he doesn't like.
|
||
(if (and (cdr keymap-and-completionp) nil) ;XXX turned off
|
||
(progn (error "EMACS BUG!") (cdr command))
|
||
(car command))
|
||
command))))
|
||
'((minibuffer-local-map . nil)
|
||
(minibuffer-local-ns-map . nil)
|
||
(minibuffer-local-completion-map . t)
|
||
(minibuffer-local-must-match-map . t)
|
||
(read-expression-map . nil))))
|
||
'(("\en" . (next-history-element . next-complete-history-element))
|
||
([next] . (next-history-element . next-complete-history-element))
|
||
("\ep" . (previous-history-element . previous-complete-history-element))
|
||
([prior] . (previous-history-element . previous-complete-history-element))
|
||
("\er" . previous-matching-history-element)
|
||
("\es" . next-matching-history-element)))
|
||
|
||
(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."
|
||
(interactive
|
||
(let* ((enable-recursive-minibuffers t)
|
||
(minibuffer-history-sexp-flag nil)
|
||
(regexp (read-from-minibuffer "Previous element matching (regexp): "
|
||
nil
|
||
minibuffer-local-map
|
||
nil
|
||
'minibuffer-history-search-history)))
|
||
;; Use the last regexp specified, by default, if input is empty.
|
||
(list (if (string= regexp "")
|
||
(setcar minibuffer-history-search-history
|
||
(nth 1 minibuffer-history-search-history))
|
||
regexp)
|
||
(prefix-numeric-value current-prefix-arg))))
|
||
(let ((history (symbol-value minibuffer-history-variable))
|
||
prevpos
|
||
(pos minibuffer-history-position))
|
||
(while (/= n 0)
|
||
(setq prevpos pos)
|
||
(setq pos (min (max 1 (+ pos (if (< n 0) -1 1))) (length history)))
|
||
(if (= pos prevpos)
|
||
(error (if (= pos 1)
|
||
"No later matching history item"
|
||
"No earlier matching history item")))
|
||
(if (string-match regexp
|
||
(if minibuffer-history-sexp-flag
|
||
(prin1-to-string (nth (1- pos) history))
|
||
(nth (1- pos) history)))
|
||
(setq n (+ n (if (< n 0) 1 -1)))))
|
||
(setq minibuffer-history-position pos)
|
||
(erase-buffer)
|
||
(let ((elt (nth (1- pos) history)))
|
||
(insert (if minibuffer-history-sexp-flag
|
||
(prin1-to-string elt)
|
||
elt)))
|
||
(goto-char (point-min)))
|
||
(if (or (eq (car (car command-history)) 'previous-matching-history-element)
|
||
(eq (car (car command-history)) '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."
|
||
(interactive
|
||
(let* ((enable-recursive-minibuffers t)
|
||
(minibuffer-history-sexp-flag nil)
|
||
(regexp (read-from-minibuffer "Next element matching (regexp): "
|
||
nil
|
||
minibuffer-local-map
|
||
nil
|
||
'minibuffer-history-search-history)))
|
||
;; Use the last regexp specified, by default, if input is empty.
|
||
(list (if (string= regexp "")
|
||
(setcar minibuffer-history-search-history
|
||
(nth 1 minibuffer-history-search-history))
|
||
regexp)
|
||
(prefix-numeric-value current-prefix-arg))))
|
||
(previous-matching-history-element regexp (- n)))
|
||
|
||
(defun next-history-element (n)
|
||
"Insert the next element of the minibuffer history into the minibuffer."
|
||
(interactive "p")
|
||
(let ((narg (min (max 1 (- minibuffer-history-position n))
|
||
(length (symbol-value minibuffer-history-variable)))))
|
||
(if (= minibuffer-history-position narg)
|
||
(error (if (= minibuffer-history-position 1)
|
||
"End of history; no next item"
|
||
"Beginning of history; no preceding item"))
|
||
(erase-buffer)
|
||
(setq minibuffer-history-position narg)
|
||
(let ((elt (nth (1- minibuffer-history-position)
|
||
(symbol-value minibuffer-history-variable))))
|
||
(insert
|
||
(if minibuffer-history-sexp-flag
|
||
(prin1-to-string elt)
|
||
elt)))
|
||
(goto-char (point-min)))))
|
||
|
||
(defun previous-history-element (n)
|
||
"Inserts the previous element of the minibuffer history into the minibuffer."
|
||
(interactive "p")
|
||
(next-history-element (- n)))
|
||
|
||
(defun next-complete-history-element (n)
|
||
"Get next element of history which is a completion of minibuffer contents."
|
||
(interactive "p")
|
||
(let ((point-at-start (point)))
|
||
(next-matching-history-element
|
||
(concat "^" (regexp-quote (buffer-substring (point-min) (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 sensical, because the text before point has not changed.
|
||
(goto-char point-at-start)))
|
||
|
||
(defun previous-complete-history-element (n)
|
||
"\
|
||
Get previous element of history which is a completion of minibuffer contents."
|
||
(interactive "p")
|
||
(next-complete-history-element (- n)))
|
||
|
||
(defun goto-line (arg)
|
||
"Goto line ARG, counting from line 1 at beginning of buffer."
|
||
(interactive "NGoto line: ")
|
||
(save-restriction
|
||
(widen)
|
||
(goto-char 1)
|
||
(if (eq selective-display t)
|
||
(re-search-forward "[\n\C-m]" nil 'end (1- arg))
|
||
(forward-line (1- arg)))))
|
||
|
||
;Put this on C-x u, so we can force that rather than C-_ into startup msg
|
||
(define-function 'advertised-undo 'undo)
|
||
|
||
(defun undo (&optional arg)
|
||
"Undo some previous changes.
|
||
Repeat this command to undo more changes.
|
||
A numeric argument serves as a repeat count."
|
||
(interactive "*p")
|
||
(let ((modified (buffer-modified-p))
|
||
(recent-save (recent-auto-save-p)))
|
||
(or (eq (selected-window) (minibuffer-window))
|
||
(message "Undo!"))
|
||
(or (eq last-command 'undo)
|
||
(progn (undo-start)
|
||
(undo-more 1)))
|
||
(setq this-command 'undo)
|
||
(undo-more (or arg 1))
|
||
(and modified (not (buffer-modified-p))
|
||
(delete-auto-save-file-if-necessary recent-save))))
|
||
|
||
(defvar pending-undo-list nil
|
||
"Within a run of consecutive undo commands, list remaining to be undone.")
|
||
|
||
(defun undo-start ()
|
||
"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 (eq buffer-undo-list t)
|
||
(error "No undo information in this buffer"))
|
||
(setq pending-undo-list buffer-undo-list))
|
||
|
||
(defun undo-more (count)
|
||
"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 pending-undo-list
|
||
(error "No further undo information"))
|
||
(setq pending-undo-list (primitive-undo count pending-undo-list)))
|
||
|
||
(defvar shell-command-history nil
|
||
"History list for some commands that read shell commands.")
|
||
|
||
(defun shell-command (command &optional flag)
|
||
"Execute string COMMAND in inferior shell; display output, if any.
|
||
If COMMAND ends in ampersand, execute it asynchronously.
|
||
|
||
Optional second arg non-nil (prefix arg, if interactive)
|
||
means insert output in current buffer after point (leave mark after it).
|
||
This cannot be done asynchronously."
|
||
(interactive (list (read-from-minibuffer "Shell command: "
|
||
nil nil nil 'shell-command-history)
|
||
current-prefix-arg))
|
||
(if flag
|
||
(progn (barf-if-buffer-read-only)
|
||
(push-mark)
|
||
;; We do not use -f for csh; we will not support broken use of
|
||
;; .cshrcs. Even the BSD csh manual says to use
|
||
;; "if ($?prompt) exit" before things which are not useful
|
||
;; non-interactively. Besides, if someone wants their other
|
||
;; aliases for shell commands then they can still have them.
|
||
(call-process shell-file-name nil t nil
|
||
"-c" command)
|
||
;; This is like exchange-point-and-mark, but doesn't activate the mark.
|
||
;; It is cleaner to avoid activation, even though the command
|
||
;; loop would deactivate the mark because we inserted text.
|
||
(goto-char (prog1 (mark t)
|
||
(set-marker (mark-marker) (point)
|
||
(current-buffer)))))
|
||
;; Preserve the match data in case called from a program.
|
||
(let ((data (match-data)))
|
||
(unwind-protect
|
||
(if (string-match "[ \t]*&[ \t]*$" command)
|
||
;; Command ending with ampersand means asynchronous.
|
||
(let ((buffer (get-buffer-create "*shell-command*"))
|
||
(directory default-directory)
|
||
proc)
|
||
;; Remove the ampersand.
|
||
(setq command (substring command 0 (match-beginning 0)))
|
||
;; If will kill a process, query first.
|
||
(setq proc (get-buffer-process buffer))
|
||
(if proc
|
||
(if (yes-or-no-p "A command is running. Kill it? ")
|
||
(kill-process proc)
|
||
(error "Shell command in progress")))
|
||
(save-excursion
|
||
(set-buffer buffer)
|
||
(erase-buffer)
|
||
(display-buffer buffer)
|
||
(setq default-directory directory)
|
||
(setq proc (start-process "Shell" buffer
|
||
shell-file-name "-c" command))
|
||
(setq mode-line-process '(": %s"))
|
||
(set-process-sentinel proc 'shell-command-sentinel)
|
||
(set-process-filter proc 'shell-command-filter)
|
||
))
|
||
(shell-command-on-region (point) (point) command nil))
|
||
(store-match-data data)))))
|
||
|
||
;; 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))
|
||
(progn
|
||
(message "%s: %s."
|
||
(car (cdr (cdr (process-command process))))
|
||
(substring signal 0 -1))
|
||
(save-excursion
|
||
(set-buffer (process-buffer process))
|
||
(setq mode-line-process nil))
|
||
(delete-process process))))
|
||
|
||
(defun shell-command-filter (proc string)
|
||
;; Do save-excursion by hand so that we can leave point numerically unchanged
|
||
;; despite an insertion immediately after it.
|
||
(let* ((obuf (current-buffer))
|
||
(buffer (process-buffer proc))
|
||
opoint
|
||
(window (get-buffer-window buffer))
|
||
(pos (window-start window)))
|
||
(unwind-protect
|
||
(progn
|
||
(set-buffer buffer)
|
||
(setq opoint (point))
|
||
(goto-char (point-max))
|
||
(insert-before-markers string))
|
||
;; insert-before-markers moved this marker: set it back.
|
||
(set-window-start window pos)
|
||
;; Finish our save-excursion.
|
||
(goto-char opoint)
|
||
(set-buffer obuf))))
|
||
|
||
(defun shell-command-on-region (start end command &optional flag interactive)
|
||
"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.
|
||
Noninteractive args are START, END, COMMAND, FLAG.
|
||
Noninteractively FLAG means insert output in place of text from START to END,
|
||
and put point at the end, but don't alter the mark.
|
||
|
||
If the output is one line, it is displayed in the echo area,
|
||
but it is nonetheless available in buffer `*Shell Command Output*'
|
||
even though that buffer is not automatically displayed. If there is no output
|
||
or output is inserted in the current buffer then `*Shell Command Output*' is
|
||
deleted."
|
||
(interactive (list (region-beginning) (region-end)
|
||
(read-from-minibuffer "Shell command on region: "
|
||
nil nil nil 'shell-command-history)
|
||
current-prefix-arg
|
||
(prefix-numeric-value current-prefix-arg)))
|
||
(if flag
|
||
;; Replace specified region with output from command.
|
||
(let ((swap (and interactive (< (point) (mark)))))
|
||
;; Don't muck with mark
|
||
;; unless called interactively.
|
||
(and interactive (push-mark))
|
||
(call-process-region start end shell-file-name t t nil
|
||
"-c" command)
|
||
(if (get-buffer "*Shell Command Output*")
|
||
(kill-buffer "*Shell Command Output*"))
|
||
(and interactive swap (exchange-point-and-mark)))
|
||
;; No prefix argument: put the output in a temp buffer,
|
||
;; replacing its entire contents.
|
||
(let ((buffer (get-buffer-create "*Shell Command Output*"))
|
||
(success nil))
|
||
(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 (delete-region end (point-max))
|
||
(delete-region (point-min) start)
|
||
(call-process-region (point-min) (point-max)
|
||
shell-file-name t t nil
|
||
"-c" command)
|
||
(setq success t))
|
||
;; Clear the output buffer, then run the command with output there.
|
||
(save-excursion
|
||
(set-buffer buffer)
|
||
(erase-buffer))
|
||
(call-process-region start end shell-file-name
|
||
nil buffer nil
|
||
"-c" command)
|
||
(setq success t))
|
||
;; Report the amount of output.
|
||
(let ((lines (save-excursion
|
||
(set-buffer buffer)
|
||
(if (= (buffer-size) 0)
|
||
0
|
||
(count-lines (point-min) (point-max))))))
|
||
(cond ((= lines 0)
|
||
(if success
|
||
(message "(Shell command completed with no output)"))
|
||
(kill-buffer buffer))
|
||
((and success (= lines 1))
|
||
(message "%s"
|
||
(save-excursion
|
||
(set-buffer buffer)
|
||
(goto-char (point-min))
|
||
(buffer-substring (point)
|
||
(progn (end-of-line) (point)))))
|
||
(kill-buffer buffer))
|
||
(t
|
||
(set-window-start (display-buffer buffer) 1))))))))
|
||
|
||
(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."
|
||
(interactive nil)
|
||
(let ((factor 4)
|
||
key)
|
||
;; (describe-arg (list factor) 1)
|
||
(setq key (read-key-sequence nil t))
|
||
(while (equal (key-binding key) 'universal-argument)
|
||
(setq factor (* 4 factor))
|
||
;; (describe-arg (list factor) 1)
|
||
(setq key (read-key-sequence nil t)))
|
||
(prefix-arg-internal key factor nil)))
|
||
|
||
(defun prefix-arg-internal (key factor value)
|
||
(let ((sign 1))
|
||
(if (and (numberp value) (< value 0))
|
||
(setq sign -1 value (- value)))
|
||
(if (eq value '-)
|
||
(setq sign -1 value nil))
|
||
;; (describe-arg value sign)
|
||
(while (equal key "-")
|
||
(setq sign (- sign) factor nil)
|
||
;; (describe-arg value sign)
|
||
(setq key (read-key-sequence nil t)))
|
||
(while (and (stringp key)
|
||
(= (length key) 1)
|
||
(not (string< key "0"))
|
||
(not (string< "9" key)))
|
||
(setq value (+ (* (if (numberp value) value 0) 10)
|
||
(- (aref key 0) ?0))
|
||
factor nil)
|
||
;; (describe-arg value sign)
|
||
(setq key (read-key-sequence nil t)))
|
||
(setq prefix-arg
|
||
(cond (factor (list factor))
|
||
((numberp value) (* value sign))
|
||
((= sign -1) '-)))
|
||
;; Calling universal-argument after digits
|
||
;; terminates the argument but is ignored.
|
||
(if (eq (key-binding key) 'universal-argument)
|
||
(progn
|
||
(describe-arg value sign)
|
||
(setq key (read-key-sequence nil t))))
|
||
(setq unread-command-events (listify-key-sequence key))))
|
||
|
||
(defun describe-arg (value sign)
|
||
(cond ((numberp value)
|
||
(message "Arg: %d" (* value sign)))
|
||
((consp value)
|
||
(message "Arg: [%d]" (car value)))
|
||
((< sign 0)
|
||
(message "Arg: -"))))
|
||
|
||
(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-arg-internal (char-to-string (logand last-command-char ?\177))
|
||
nil arg))
|
||
|
||
(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-arg-internal "-" nil arg))
|
||
|
||
(defun forward-to-indentation (arg)
|
||
"Move forward ARG lines and position at first nonblank character."
|
||
(interactive "p")
|
||
(forward-line arg)
|
||
(skip-chars-forward " \t"))
|
||
|
||
(defun backward-to-indentation (arg)
|
||
"Move backward ARG lines and position at first nonblank character."
|
||
(interactive "p")
|
||
(forward-line (- arg))
|
||
(skip-chars-forward " \t"))
|
||
|
||
(defvar kill-whole-line nil
|
||
"*If non-nil, `kill-line' with no arg at beg of line kills the whole line.")
|
||
|
||
(defun kill-line (&optional arg)
|
||
"Kill the rest of the current line; if no nonblanks there, kill thru newline.
|
||
With prefix argument, kill that many lines from point.
|
||
Negative arguments kill lines backward.
|
||
|
||
When calling from a program, nil means \"no arg\",
|
||
a number counts as a prefix arg.
|
||
|
||
If `kill-whole-line' is non-nil, then kill the whole line
|
||
when given no argument at the beginning of a line."
|
||
(interactive "P")
|
||
(kill-region (point)
|
||
;; Don't shift point before doing the delete; that way,
|
||
;; undo will record the right position of point.
|
||
(save-excursion
|
||
(if arg
|
||
(forward-line (prefix-numeric-value arg))
|
||
(if (eobp)
|
||
(signal 'end-of-buffer nil))
|
||
(if (or (looking-at "[ \t]*$") (and kill-whole-line (bolp)))
|
||
(forward-line 1)
|
||
(end-of-line)))
|
||
(point))))
|
||
|
||
;;;; Window system cut and paste hooks.
|
||
|
||
(defvar interprogram-cut-function nil
|
||
"Function to call to make a killed region available to other programs.
|
||
|
||
Most window systems provide some sort of facility for cutting and
|
||
pasting text between the windows of different programs.
|
||
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 or two arguments.
|
||
The first argument, TEXT, is a string containing
|
||
the text which should be made available.
|
||
The second, PUSH, if non-nil means this is a \"new\" kill;
|
||
nil means appending to an \"old\" kill.")
|
||
|
||
(defvar interprogram-paste-function nil
|
||
"Function to call to get text cut from other programs.
|
||
|
||
Most window systems provide some sort of facility for cutting and
|
||
pasting text between the windows of different programs.
|
||
This variable holds a function that Emacs calls to obtain
|
||
text that other programs have provided for pasting.
|
||
|
||
The function should be called with no arguments. If the function
|
||
returns nil, then no other program has provided such text, and the top
|
||
of the Emacs kill ring should be used. If the function returns a
|
||
string, that string should be put in the kill ring as the latest kill.
|
||
|
||
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.")
|
||
|
||
(defconst kill-ring-max 30
|
||
"*Maximum length of kill ring before oldest elements are thrown away.")
|
||
|
||
(defvar kill-ring-yank-pointer nil
|
||
"The tail of the kill ring whose car is the last thing yanked.")
|
||
|
||
(defun kill-new (string)
|
||
"Make STRING the latest kill in the kill ring.
|
||
Set the kill-ring-yank pointer to point to it.
|
||
If `interprogram-cut-function' is non-nil, apply it to STRING."
|
||
(setq kill-ring (cons 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 t)))
|
||
|
||
(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.
|
||
If `interprogram-cut-function' is set, pass the resulting kill to
|
||
it."
|
||
(setcar kill-ring
|
||
(if before-p
|
||
(concat string (car kill-ring))
|
||
(concat (car kill-ring) string)))
|
||
(if interprogram-cut-function
|
||
(funcall interprogram-cut-function (car kill-ring))))
|
||
|
||
(defun current-kill (n &optional do-not-move)
|
||
"Rotate the yanking point by N places, and then return that kill.
|
||
If N is zero, `interprogram-paste-function' is set, and calling it
|
||
returns a string, then that string is added to the front of the
|
||
kill ring and returned as the latest kill.
|
||
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))
|
||
(kill-new interprogram-paste))
|
||
interprogram-paste)
|
||
(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)))
|
||
(or do-not-move
|
||
(setq kill-ring-yank-pointer ARGth-kill-element))
|
||
(car ARGth-kill-element)))))
|
||
|
||
|
||
|
||
;;;; Commands for manipulating the kill ring.
|
||
|
||
(defun kill-region (beg end)
|
||
"Kill between point and mark.
|
||
The text is deleted but saved in the kill ring.
|
||
The command \\[yank] can retrieve it from there.
|
||
\(If you want to kill and then yank immediately, use \\[copy-region-as-kill].)
|
||
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.
|
||
|
||
This is the primitive for programs to kill text (as opposed to deleting it).
|
||
Supply two arguments, character numbers 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."
|
||
(interactive "r")
|
||
(cond
|
||
|
||
;; If the buffer is read-only, we should beep, in case the person
|
||
;; just isn't aware of this. However, there's no harm in putting
|
||
;; the region's text in the kill ring, anyway.
|
||
((and buffer-read-only (not inhibit-read-only))
|
||
(copy-region-as-kill beg end)
|
||
;; This should always barf, and give us the correct error.
|
||
(barf-if-buffer-read-only))
|
||
|
||
;; In certain cases, we can arrange for the undo list and the kill
|
||
;; ring to share the same string object. This code does that.
|
||
((not (or (eq buffer-undo-list t)
|
||
(eq last-command 'kill-region)
|
||
(equal beg end)))
|
||
;; Don't let the undo list be truncated before we can even access it.
|
||
(let ((undo-strong-limit (+ (- (max beg end) (min beg end)) 100))
|
||
(old-list buffer-undo-list)
|
||
tail)
|
||
(delete-region beg end)
|
||
;; Search back in buffer-undo-list for this string,
|
||
;; in case a change hook made property changes.
|
||
(setq tail buffer-undo-list)
|
||
(while (not (stringp (car (car tail))))
|
||
(setq tail (cdr tail)))
|
||
;; Take the same string recorded for undo
|
||
;; and put it in the kill-ring.
|
||
(kill-new (car (car tail)))
|
||
(setq this-command 'kill-region)))
|
||
|
||
(t
|
||
(copy-region-as-kill beg end)
|
||
(delete-region beg end))))
|
||
|
||
(defun copy-region-as-kill (beg end)
|
||
"Save the region as if killed, but don't kill it.
|
||
If `interprogram-cut-function' is non-nil, also save the text for a window
|
||
system cut and paste."
|
||
(interactive "r")
|
||
(if (eq last-command 'kill-region)
|
||
(kill-append (buffer-substring beg end) (< end beg))
|
||
(kill-new (buffer-substring beg end)))
|
||
(setq this-command 'kill-region)
|
||
nil)
|
||
|
||
(defun kill-ring-save (beg end)
|
||
"Save the region as if killed, but don't kill it.
|
||
This command is similar to `copy-region-as-kill', except that it gives
|
||
visual feedback indicating the extent of the region being copied.
|
||
If `interprogram-cut-function' is non-nil, also save the text for a window
|
||
system cut and paste."
|
||
(interactive "r")
|
||
(copy-region-as-kill beg end)
|
||
(if (interactive-p)
|
||
(let ((other-end (if (= (point) beg) end beg))
|
||
(opoint (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 other-end (selected-window))
|
||
(progn
|
||
;; Swap point and mark.
|
||
(set-marker (mark-marker) (point) (current-buffer))
|
||
(goto-char other-end)
|
||
(sit-for 1)
|
||
;; Swap back.
|
||
(set-marker (mark-marker) other-end (current-buffer))
|
||
(goto-char opoint)
|
||
;; If user quit, deactivate the mark
|
||
;; as C-g would as a command.
|
||
(and quit-flag mark-active
|
||
(deactivate-mark)))
|
||
(let* ((killed-text (current-kill 0))
|
||
(message-len (min (length killed-text) 40)))
|
||
(if (= (point) beg)
|
||
;; Don't say "killed"; that is misleading.
|
||
(message "Saved text until \"%s\""
|
||
(substring killed-text (- message-len)))
|
||
(message "Saved text from \"%s\""
|
||
(substring killed-text 0 message-len))))))))
|
||
|
||
(defun append-next-kill ()
|
||
"Cause following command, if it kills, to append to previous kill."
|
||
(interactive)
|
||
(if (interactive-p)
|
||
(progn
|
||
(setq this-command 'kill-region)
|
||
(message "If the next command is a kill, it will append"))
|
||
(setq last-command 'kill-region)))
|
||
|
||
(defun yank-pop (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."
|
||
(interactive "*p")
|
||
(if (not (eq last-command 'yank))
|
||
(error "Previous command was not a yank"))
|
||
(setq this-command 'yank)
|
||
(let ((before (< (point) (mark t))))
|
||
(delete-region (point) (mark t))
|
||
(set-marker (mark-marker) (point) (current-buffer))
|
||
(insert (current-kill arg))
|
||
(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 the last stretch of killed text.
|
||
More precisely, reinsert the stretch of killed text most recently
|
||
killed OR yanked. Put point at end, and set mark at beginning.
|
||
With just C-u as argument, same but put point at beginning (and mark at end).
|
||
With argument N, reinsert the Nth most recently killed stretch of killed
|
||
text.
|
||
See also the command \\[yank-pop]."
|
||
(interactive "*P")
|
||
(push-mark (point))
|
||
(insert (current-kill (cond
|
||
((listp arg) 0)
|
||
((eq arg '-) -1)
|
||
(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)))))
|
||
nil)
|
||
|
||
(defun rotate-yank-pointer (arg)
|
||
"Rotate the yanking point in the kill ring.
|
||
With argument, rotate that many kills forward (or backward, if negative)."
|
||
(interactive "p")
|
||
(current-kill arg))
|
||
|
||
|
||
(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."
|
||
(interactive (list (progn (barf-if-buffer-read-only)
|
||
(read-buffer "Insert buffer: " (other-buffer) t))))
|
||
(or (bufferp buffer)
|
||
(setq buffer (get-buffer buffer)))
|
||
(let (start end newmark)
|
||
(save-excursion
|
||
(save-excursion
|
||
(set-buffer buffer)
|
||
(setq start (point-min) end (point-max)))
|
||
(insert-buffer-substring buffer start end)
|
||
(setq newmark (point)))
|
||
(push-mark newmark))
|
||
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 nil t))
|
||
(region-beginning) (region-end)))
|
||
(let ((oldbuf (current-buffer)))
|
||
(save-excursion
|
||
(set-buffer (get-buffer-create buffer))
|
||
(insert-buffer-substring oldbuf start end))))
|
||
|
||
(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)))
|
||
(save-excursion
|
||
(set-buffer (get-buffer-create buffer))
|
||
(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)))
|
||
(save-excursion
|
||
(set-buffer (get-buffer-create buffer))
|
||
(erase-buffer)
|
||
(save-excursion
|
||
(insert-buffer-substring oldbuf start end)))))
|
||
|
||
(defvar mark-even-if-inactive nil
|
||
"*Non-nil means you can use the mark even when inactive.
|
||
This option makes a difference in Transient Mark mode.
|
||
When the option is non-nil, deactivation of the mark
|
||
turns off region highlighting, but commands that use the mark
|
||
behave as if the mark were still active.")
|
||
|
||
(put 'mark-inactive 'error-conditions '(mark-inactive error))
|
||
(put 'mark-inactive 'error-message "The mark is not active now")
|
||
|
||
(defun mark (&optional force)
|
||
"Return this buffer's mark value as integer; error if mark inactive.
|
||
If optional argument FORCE is non-nil, access the mark value
|
||
even if the mark is not currently active, and return nil
|
||
if there is no mark at all.
|
||
|
||
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 mark-active mark-even-if-inactive)
|
||
(marker-position (mark-marker))
|
||
(signal 'mark-inactive nil)))
|
||
|
||
;; Many places set mark-active directly, and several of them failed to also
|
||
;; run deactivate-mark-hook. This shorthand should simplify.
|
||
(defsubst deactivate-mark ()
|
||
"Deactivate the mark by setting `mark-active' to nil.
|
||
\(That makes a difference only in Transient Mark mode.)
|
||
Also runs the hook `deactivate-mark-hook'."
|
||
(setq mark-active nil)
|
||
(run-hooks 'deactivate-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
|
||
(setq mark-active t)
|
||
(run-hooks 'activate-mark-hook)
|
||
(set-marker (mark-marker) pos (current-buffer)))
|
||
(deactivate-mark)
|
||
(set-marker (mark-marker) pos (current-buffer))))
|
||
|
||
(defvar mark-ring nil
|
||
"The list of saved former marks of the current buffer,
|
||
most recent first.")
|
||
(make-variable-buffer-local 'mark-ring)
|
||
|
||
(defconst mark-ring-max 16
|
||
"*Maximum size of mark ring. Start discarding off end if gets this big.")
|
||
|
||
(defvar global-mark-ring nil
|
||
"The list of saved global marks, most recent first.")
|
||
|
||
(defconst global-mark-ring-max 16
|
||
"*Maximum size of global mark ring. \
|
||
Start discarding off end if gets this big.")
|
||
|
||
(defun set-mark-command (arg)
|
||
"Set mark at where point is, or jump to mark.
|
||
With no prefix argument, set mark, push old mark position on local mark
|
||
ring, and push mark on global mark ring.
|
||
With argument, jump to mark, and pop a new position for mark off the ring
|
||
\(does not affect global mark ring\).
|
||
|
||
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")
|
||
(if (null arg)
|
||
(progn
|
||
(push-mark nil nil t))
|
||
(if (null (mark t))
|
||
(error "No mark set in this buffer")
|
||
(goto-char (mark t))
|
||
(pop-mark))))
|
||
|
||
(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.
|
||
In Transient Mark mode, activate mark if optional third arg ACTIVATE 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, this does not activate the mark."
|
||
(if (null (mark t))
|
||
nil
|
||
(setq mark-ring (cons (copy-marker (mark-marker)) mark-ring))
|
||
(if (> (length mark-ring) mark-ring-max)
|
||
(progn
|
||
(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))
|
||
(if (> (length global-mark-ring) global-mark-ring-max)
|
||
(progn
|
||
(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-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."
|
||
(if mark-ring
|
||
(progn
|
||
(setq mark-ring (nconc mark-ring (list (copy-marker (mark-marker)))))
|
||
(set-marker (mark-marker) (+ 0 (car mark-ring)) (current-buffer))
|
||
(deactivate-mark)
|
||
(move-marker (car mark-ring) nil)
|
||
(if (null (mark t)) (ding))
|
||
(setq mark-ring (cdr mark-ring)))))
|
||
|
||
(define-function 'exchange-dot-and-mark 'exchange-point-and-mark)
|
||
(defun exchange-point-and-mark ()
|
||
"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."
|
||
(interactive nil)
|
||
(let ((omark (mark t)))
|
||
(if (null omark)
|
||
(error "No mark set in this buffer"))
|
||
(set-mark (point))
|
||
(goto-char omark)
|
||
nil))
|
||
|
||
(defun transient-mark-mode (arg)
|
||
"Toggle Transient Mark mode.
|
||
With arg, turn Transient Mark mode on if arg is positive, off otherwise.
|
||
|
||
In Transient Mark mode, when the mark is active, the region is highlighted.
|
||
Changing the buffer \"deactivates\" the mark.
|
||
So do 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]."
|
||
(interactive "P")
|
||
(setq transient-mark-mode
|
||
(if (null arg)
|
||
(not transient-mark-mode)
|
||
(> (prefix-numeric-value arg) 0))))
|
||
|
||
(defun pop-global-mark ()
|
||
"Pop off global mark ring and jump to the top location."
|
||
(interactive)
|
||
(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 (cdr global-mark-ring))
|
||
(set-buffer buffer)
|
||
(or (and (>= position (point-min))
|
||
(<= position (point-max)))
|
||
(widen))
|
||
(goto-char position)
|
||
(switch-to-buffer buffer)))
|
||
(define-key ctl-x-map "\C-@" 'pop-global-mark)
|
||
(define-key ctl-x-map [C-SPC] 'pop-global-mark)
|
||
|
||
|
||
(defvar next-line-add-newlines t
|
||
"*If non-nil, `next-line' inserts newline to avoid `end of buffer' error.")
|
||
|
||
(defun next-line (arg)
|
||
"Move cursor vertically down ARG lines.
|
||
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, a newline character is inserted
|
||
to create a line and the cursor moves to that line, otherwise the cursor is
|
||
moved to the end of the buffer (if already at the end of the buffer, an error
|
||
is signaled).
|
||
|
||
The command \\[set-goal-column] can be used to create
|
||
a semipermanent goal column to which this command always moves.
|
||
Then it does not try to move vertically. This goal column is stored
|
||
in `goal-column', which is nil when there is none.
|
||
|
||
If you are thinking of using this in a Lisp program, consider
|
||
using `forward-line' instead. It is usually easier to use
|
||
and more reliable (no dependence on goal column, etc.)."
|
||
(interactive "p")
|
||
(if (and next-line-add-newlines (= arg 1))
|
||
(let ((opoint (point)))
|
||
(forward-line 1)
|
||
(if (or (= opoint (point)) (not (eq (preceding-char) ?\n)))
|
||
(insert ?\n)
|
||
(goto-char opoint)
|
||
(line-move arg)))
|
||
(line-move arg))
|
||
nil)
|
||
|
||
(defun previous-line (arg)
|
||
"Move cursor vertically up ARG lines.
|
||
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.
|
||
|
||
The command \\[set-goal-column] can be used to create
|
||
a semipermanent goal column to which this command always moves.
|
||
Then it does not try to move vertically.
|
||
|
||
If you are thinking of using this in a Lisp program, consider using
|
||
`forward-line' with a negative argument instead. It is usually easier
|
||
to use and more reliable (no dependence on goal column, etc.)."
|
||
(interactive "p")
|
||
(line-move (- arg))
|
||
nil)
|
||
|
||
(defconst 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.")
|
||
|
||
(defvar goal-column nil
|
||
"*Semipermanent goal column for vertical motion, as set by \\[set-goal-column], or nil.")
|
||
(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 current run of vertical motion commands.
|
||
When the `track-eol' feature is doing its job, the value is 9999.")
|
||
|
||
(defun line-move (arg)
|
||
(let ((signal
|
||
(catch 'exit
|
||
(if (not (or (eq last-command 'next-line)
|
||
(eq last-command '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 'end-of-line)))
|
||
9999
|
||
(current-column))))
|
||
(if (not (integerp selective-display))
|
||
(or (and (zerop (forward-line arg))
|
||
(bolp))
|
||
(throw 'exit (if (bobp)
|
||
'beginning-of-buffer
|
||
'end-of-buffer)))
|
||
;; Move by arg lines, but ignore invisible ones.
|
||
(while (> arg 0)
|
||
(end-of-line)
|
||
(and (zerop (vertical-motion 1))
|
||
(throw 'exit 'end-of-buffer))
|
||
(setq arg (1- arg)))
|
||
(while (< arg 0)
|
||
(beginning-of-line)
|
||
(and (zerop (vertical-motion -1))
|
||
(throw 'exit 'beginning-of-buffer))
|
||
(setq arg (1+ arg))))
|
||
(move-to-column (or goal-column temporary-goal-column))
|
||
nil)))
|
||
(cond
|
||
((eq signal 'beginning-of-buffer)
|
||
(message "Beginning of buffer")
|
||
(ding))
|
||
((eq signal 'end-of-buffer)
|
||
(message "End of buffer")
|
||
(ding)))))
|
||
|
||
;;; 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, 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))
|
||
(message (substitute-command-keys
|
||
"Goal column %d (use \\[set-goal-column] with an arg to unset it)")
|
||
goal-column))
|
||
nil)
|
||
|
||
;;; Partial support for horizontal autoscrolling. Someday, this feature
|
||
;;; will be built into the C level and all the (hscroll-point-visible) calls
|
||
;;; will go away.
|
||
|
||
(defvar hscroll-step 0
|
||
"*The number of columns to try scrolling a window by when point moves out.
|
||
If that fails to bring point back on frame, point is centered instead.
|
||
If this is zero, point is always centered after it moves off frame.")
|
||
|
||
(defun hscroll-point-visible ()
|
||
"Scrolls the window horizontally to make point visible."
|
||
(let* ((here (current-column))
|
||
(left (window-hscroll))
|
||
(right (- (+ left (window-width)) 3)))
|
||
(cond
|
||
;; Should we recenter?
|
||
((or (< here (- left hscroll-step))
|
||
(> here (+ right hscroll-step)))
|
||
(set-window-hscroll
|
||
(selected-window)
|
||
;; Recenter, but don't show too much white space off the end of
|
||
;; the line.
|
||
(max 0
|
||
(min (- (save-excursion (end-of-line) (current-column))
|
||
(window-width)
|
||
-5)
|
||
(- here (/ (window-width) 2))))))
|
||
;; Should we scroll left?
|
||
((> here right)
|
||
(scroll-left hscroll-step))
|
||
;; Or right?
|
||
((< here left)
|
||
(scroll-right hscroll-step)))))
|
||
|
||
;; rms: (1) The definitions of arrow keys should not simply restate
|
||
;; what keys they are. The arrow keys should run the ordinary commands.
|
||
;; (2) The arrow keys are just one of many common ways of moving point
|
||
;; within a line. Real horizontal autoscrolling would be a good feature,
|
||
;; but supporting it only for arrow keys is too incomplete to be desirable.
|
||
|
||
;;;;; Make arrow keys do the right thing for improved terminal support
|
||
;;;;; When we implement true horizontal autoscrolling, right-arrow and
|
||
;;;;; left-arrow can lose the (if truncate-lines ...) clause and become
|
||
;;;;; aliases. These functions are bound to the corresponding keyboard
|
||
;;;;; events in loaddefs.el.
|
||
|
||
;;(defun right-arrow (arg)
|
||
;; "Move right one character on the screen (with prefix ARG, that many chars).
|
||
;;Scroll right if needed to keep point horizontally onscreen."
|
||
;; (interactive "P")
|
||
;; (forward-char arg)
|
||
;; (hscroll-point-visible))
|
||
|
||
;;(defun left-arrow (arg)
|
||
;; "Move left one character on the screen (with prefix ARG, that many chars).
|
||
;;Scroll left if needed to keep point horizontally onscreen."
|
||
;; (interactive "P")
|
||
;; (backward-char arg)
|
||
;; (hscroll-point-visible))
|
||
|
||
(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")
|
||
(and (null arg) (eolp) (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."
|
||
(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 'forward-sexp arg))
|
||
|
||
(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 1)
|
||
(progn
|
||
;; Move forward over a line,
|
||
;; but create a newline if none exists yet.
|
||
(end-of-line)
|
||
(if (eobp)
|
||
(newline)
|
||
(forward-char 1)))
|
||
(forward-line arg))))
|
||
arg))
|
||
|
||
(defun transpose-subr (mover arg)
|
||
(let (start1 end1 start2 end2)
|
||
(if (= arg 0)
|
||
(progn
|
||
(save-excursion
|
||
(funcall mover 1)
|
||
(setq end2 (point))
|
||
(funcall mover -1)
|
||
(setq start2 (point))
|
||
(goto-char (mark))
|
||
(funcall mover 1)
|
||
(setq end1 (point))
|
||
(funcall mover -1)
|
||
(setq start1 (point))
|
||
(transpose-subr-1))
|
||
(exchange-point-and-mark)))
|
||
(while (> arg 0)
|
||
(funcall mover -1)
|
||
(setq start1 (point))
|
||
(funcall mover 1)
|
||
(setq end1 (point))
|
||
(funcall mover 1)
|
||
(setq end2 (point))
|
||
(funcall mover -1)
|
||
(setq start2 (point))
|
||
(transpose-subr-1)
|
||
(goto-char end2)
|
||
(setq arg (1- arg)))
|
||
(while (< arg 0)
|
||
(funcall mover -1)
|
||
(setq start2 (point))
|
||
(funcall mover -1)
|
||
(setq start1 (point))
|
||
(funcall mover 1)
|
||
(setq end1 (point))
|
||
(funcall mover 1)
|
||
(setq end2 (point))
|
||
(transpose-subr-1)
|
||
(setq arg (1+ arg)))))
|
||
|
||
(defun transpose-subr-1 ()
|
||
(if (> (min end1 end2) (max start1 start2))
|
||
(error "Don't have two things to transpose"))
|
||
(let ((word1 (buffer-substring start1 end1))
|
||
(word2 (buffer-substring start2 end2)))
|
||
(delete-region start2 end2)
|
||
(goto-char start2)
|
||
(insert word1)
|
||
(goto-char (if (< start1 start2) start1
|
||
(+ start1 (- (length word1) (length word2)))))
|
||
(delete-char (length word1))
|
||
(insert word2)))
|
||
|
||
(defconst comment-column 32
|
||
"*Column to indent right-margin comments to.
|
||
Setting this variable automatically makes it local to the current buffer.
|
||
Each mode establishes a different default value for this variable; you
|
||
can the value for a particular mode using that mode's hook.")
|
||
(make-variable-buffer-local 'comment-column)
|
||
|
||
(defconst comment-start nil
|
||
"*String to insert to start a new comment, or nil if no comment syntax defined.")
|
||
|
||
(defconst comment-start-skip nil
|
||
"*Regexp to match the start of a comment plus everything up to its body.
|
||
If there are any \\(...\\) pairs, the comment delimiter text is held to begin
|
||
at the place matched by the close of the first pair.")
|
||
|
||
(defconst comment-end ""
|
||
"*String to insert to end a new comment.
|
||
Should be an empty string if comments are terminated by end-of-line.")
|
||
|
||
(defconst comment-indent-hook nil
|
||
"Obsolete variable for function to compute desired indentation for a comment.
|
||
This function is called with no args with point at the beginning of
|
||
the comment's starting delimiter.")
|
||
|
||
(defconst comment-indent-function
|
||
'(lambda () comment-column)
|
||
"Function to compute desired indentation for a comment.
|
||
This function is called with no args with point at the beginning of
|
||
the comment's starting delimiter.")
|
||
|
||
(defun indent-for-comment ()
|
||
"Indent this line's comment to comment column, or insert an empty comment."
|
||
(interactive "*")
|
||
(beginning-of-line 1)
|
||
(if (null comment-start)
|
||
(error "No comment syntax defined")
|
||
(let* ((eolpos (save-excursion (end-of-line) (point)))
|
||
cpos indent begpos)
|
||
(if (re-search-forward comment-start-skip eolpos 'move)
|
||
(progn (setq cpos (point-marker))
|
||
;; Find the start of the comment delimiter.
|
||
;; If there were paren-pairs in comment-start-skip,
|
||
;; position at the end of the first pair.
|
||
(if (match-end 1)
|
||
(goto-char (match-end 1))
|
||
;; If comment-start-skip matched a string with
|
||
;; internal whitespace (not final whitespace) then
|
||
;; the delimiter start at the end of that
|
||
;; whitespace. Otherwise, it starts at the
|
||
;; beginning of what was matched.
|
||
(skip-syntax-backward " " (match-beginning 0))
|
||
(skip-syntax-backward "^ " (match-beginning 0)))))
|
||
(setq begpos (point))
|
||
;; Compute desired indent.
|
||
(if (= (current-column)
|
||
(setq indent (if comment-indent-hook
|
||
(funcall comment-indent-hook)
|
||
(funcall comment-indent-function))))
|
||
(goto-char begpos)
|
||
;; If that's different from current, change it.
|
||
(skip-chars-backward " \t")
|
||
(delete-region (point) begpos)
|
||
(indent-to indent))
|
||
;; An existing comment?
|
||
(if cpos
|
||
(progn (goto-char cpos)
|
||
(set-marker cpos nil))
|
||
;; No, insert one.
|
||
(insert comment-start)
|
||
(save-excursion
|
||
(insert comment-end))))))
|
||
|
||
(defun set-comment-column (arg)
|
||
"Set the comment column based on point.
|
||
With no arg, set the comment column to the current column.
|
||
With just minus as arg, kill any comment on this line.
|
||
With any other arg, set comment column to indentation of the previous comment
|
||
and then align or create a comment on this line at that column."
|
||
(interactive "P")
|
||
(if (eq arg '-)
|
||
(kill-comment nil)
|
||
(if arg
|
||
(progn
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(re-search-backward comment-start-skip)
|
||
(beginning-of-line)
|
||
(re-search-forward comment-start-skip)
|
||
(goto-char (match-beginning 0))
|
||
(setq comment-column (current-column))
|
||
(message "Comment column set to %d" comment-column))
|
||
(indent-for-comment))
|
||
(setq comment-column (current-column))
|
||
(message "Comment column set to %d" comment-column))))
|
||
|
||
(defun kill-comment (arg)
|
||
"Kill the comment on this line, if any.
|
||
With argument, kill comments on that many lines starting with this one."
|
||
;; this function loses in a lot of situations. it incorrectly recognises
|
||
;; comment delimiters sometimes (ergo, inside a string), doesn't work
|
||
;; with multi-line comments, can kill extra whitespace if comment wasn't
|
||
;; through end-of-line, et cetera.
|
||
(interactive "P")
|
||
(or comment-start-skip (error "No comment syntax defined"))
|
||
(let ((count (prefix-numeric-value arg)) endc)
|
||
(while (> count 0)
|
||
(save-excursion
|
||
(end-of-line)
|
||
(setq endc (point))
|
||
(beginning-of-line)
|
||
(and (string< "" comment-end)
|
||
(setq endc
|
||
(progn
|
||
(re-search-forward (regexp-quote comment-end) endc 'move)
|
||
(skip-chars-forward " \t")
|
||
(point))))
|
||
(beginning-of-line)
|
||
(if (re-search-forward comment-start-skip endc t)
|
||
(progn
|
||
(goto-char (match-beginning 0))
|
||
(skip-chars-backward " \t")
|
||
(kill-region (point) endc)
|
||
;; to catch comments a line beginnings
|
||
(indent-according-to-mode))))
|
||
(if arg (forward-line 1))
|
||
(setq count (1- count)))))
|
||
|
||
(defun comment-region (beg end &optional arg)
|
||
"Comment or uncomment each line in the region.
|
||
With just C-u prefix arg, uncomment each line in region.
|
||
Numeric prefix arg ARG means use ARG comment characters.
|
||
If ARG is negative, delete that many comment characters instead.
|
||
Comments are terminated on each line, even for syntax in which newline does
|
||
not end the comment. Blank lines do not get comments."
|
||
;; if someone wants it to only put a comment-start at the beginning and
|
||
;; comment-end at the end then typing it, C-x C-x, closing it, C-x C-x
|
||
;; is easy enough. No option is made here for other than commenting
|
||
;; every line.
|
||
(interactive "r\nP")
|
||
(or comment-start (error "No comment syntax is defined"))
|
||
(if (> beg end) (let (mid) (setq mid beg beg end end mid)))
|
||
(save-excursion
|
||
(save-restriction
|
||
(let ((cs comment-start) (ce comment-end)
|
||
numarg)
|
||
(if (consp arg) (setq numarg t)
|
||
(setq numarg (prefix-numeric-value arg))
|
||
;; For positive arg > 1, replicate the comment delims now,
|
||
;; then insert the replicated strings just once.
|
||
(while (> numarg 1)
|
||
(setq cs (concat cs comment-start)
|
||
ce (concat ce comment-end))
|
||
(setq numarg (1- numarg))))
|
||
;; Loop over all lines from BEG to END.
|
||
(narrow-to-region beg end)
|
||
(goto-char beg)
|
||
(while (not (eobp))
|
||
(if (or (eq numarg t) (< numarg 0))
|
||
(progn
|
||
;; Delete comment start from beginning of line.
|
||
(if (eq numarg t)
|
||
(while (looking-at (regexp-quote cs))
|
||
(delete-char (length cs)))
|
||
(let ((count numarg))
|
||
(while (and (> 1 (setq count (1+ count)))
|
||
(looking-at (regexp-quote cs)))
|
||
(delete-char (length cs)))))
|
||
;; Delete comment end from end of line.
|
||
(if (string= "" ce)
|
||
nil
|
||
(if (eq numarg t)
|
||
(progn
|
||
(end-of-line)
|
||
;; This is questionable if comment-end ends in
|
||
;; whitespace. That is pretty brain-damaged,
|
||
;; though.
|
||
(skip-chars-backward " \t")
|
||
(if (and (>= (- (point) (point-min)) (length ce))
|
||
(save-excursion
|
||
(backward-char (length ce))
|
||
(looking-at (regexp-quote ce))))
|
||
(delete-char (- (length ce)))))
|
||
(let ((count numarg))
|
||
(while (> 1 (setq count (1+ count)))
|
||
(end-of-line)
|
||
;; this is questionable if comment-end ends in whitespace
|
||
;; that is pretty brain-damaged though
|
||
(skip-chars-backward " \t")
|
||
(save-excursion
|
||
(backward-char (length ce))
|
||
(if (looking-at (regexp-quote ce))
|
||
(delete-char (length ce))))))))
|
||
(forward-line 1))
|
||
;; Insert at beginning and at end.
|
||
(if (looking-at "[ \t]*$") ()
|
||
(insert cs)
|
||
(if (string= "" ce) ()
|
||
(end-of-line)
|
||
(insert ce)))
|
||
(search-forward "\n" nil 'move)))))))
|
||
|
||
(defun backward-word (arg)
|
||
"Move backward until encountering the end of a word.
|
||
With argument, do this that many times.
|
||
In programs, it is faster to call `forward-word' with negative arg."
|
||
(interactive "p")
|
||
(forward-word (- arg)))
|
||
|
||
(defun mark-word (arg)
|
||
"Set mark arg words away from point."
|
||
(interactive "p")
|
||
(push-mark
|
||
(save-excursion
|
||
(forward-word arg)
|
||
(point))
|
||
nil t))
|
||
|
||
(defun kill-word (arg)
|
||
"Kill characters forward until encountering the end of a word.
|
||
With argument, do this that many times."
|
||
(interactive "p")
|
||
(kill-region (point) (save-excursion (forward-word arg) (point))))
|
||
|
||
(defun backward-kill-word (arg)
|
||
"Kill characters backward until encountering the end of a word.
|
||
With argument, do this that many times."
|
||
(interactive "p")
|
||
(kill-word (- arg)))
|
||
|
||
(defun current-word ()
|
||
"Return the word point is on as a string, if it's between two
|
||
word-constituent characters. If not, but it immediately follows one,
|
||
move back first. Otherwise, if point precedes a word constituent,
|
||
move forward first. Otherwise, move backwards until a word constituent
|
||
is found and get that word; if you reach a newline first, move forward
|
||
instead."
|
||
(interactive)
|
||
(save-excursion
|
||
(let ((oldpoint (point)) (start (point)) (end (point)))
|
||
(skip-syntax-backward "w_") (setq start (point))
|
||
(goto-char oldpoint)
|
||
(skip-syntax-forward "w_") (setq end (point))
|
||
(if (and (eq start oldpoint) (eq end oldpoint))
|
||
(progn
|
||
(skip-syntax-backward "^w_"
|
||
(save-excursion (beginning-of-line) (point)))
|
||
(if (eq (preceding-char) ?\n)
|
||
(progn
|
||
(skip-syntax-forward "^w_")
|
||
(setq start (point))
|
||
(skip-syntax-forward "w_")
|
||
(setq end (point)))
|
||
(setq end (point))
|
||
(skip-syntax-backward "w_")
|
||
(setq start (point)))))
|
||
(buffer-substring start end))))
|
||
|
||
(defconst fill-prefix nil
|
||
"*String for filling to insert at front of new line, or nil for none.
|
||
Setting this variable automatically makes it local to the current buffer.")
|
||
(make-variable-buffer-local 'fill-prefix)
|
||
|
||
(defconst auto-fill-inhibit-regexp nil
|
||
"*Regexp to match lines which should not be auto-filled.")
|
||
|
||
(defun do-auto-fill ()
|
||
(let (give-up)
|
||
(or (and auto-fill-inhibit-regexp
|
||
(save-excursion (beginning-of-line)
|
||
(looking-at auto-fill-inhibit-regexp)))
|
||
(while (and (not give-up) (> (current-column) fill-column))
|
||
;; Determine where to split the line.
|
||
(let ((fill-point
|
||
(let ((opoint (point))
|
||
bounce
|
||
(first t))
|
||
(save-excursion
|
||
(move-to-column (1+ fill-column))
|
||
;; Move back to a word boundary.
|
||
(while (or first
|
||
;; If this is after period and a single space,
|
||
;; move back once more--we don't want to break
|
||
;; the line there and make it look like a
|
||
;; sentence end.
|
||
(and (not (bobp))
|
||
(not bounce)
|
||
sentence-end-double-space
|
||
(save-excursion (forward-char -1)
|
||
(and (looking-at "\\. ")
|
||
(not (looking-at "\\. "))))))
|
||
(setq first nil)
|
||
(skip-chars-backward "^ \t\n")
|
||
;; If we find nowhere on the line to break it,
|
||
;; break after one word. Set bounce to t
|
||
;; so we will not keep going in this while loop.
|
||
(if (bolp)
|
||
(progn
|
||
(re-search-forward "[ \t]" opoint t)
|
||
(setq bounce t)))
|
||
(skip-chars-backward " \t"))
|
||
;; Let fill-point be set to the place where we end up.
|
||
(point)))))
|
||
;; If that place is not the beginning of the line,
|
||
;; break the line there.
|
||
(if (save-excursion
|
||
(goto-char fill-point)
|
||
(not (bolp)))
|
||
(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))
|
||
(indent-new-comment-line)
|
||
(save-excursion
|
||
(goto-char fill-point)
|
||
(indent-new-comment-line)))
|
||
;; 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)))
|
||
;; No place to break => stop trying.
|
||
(setq give-up t)))))))
|
||
|
||
(defconst comment-multi-line nil
|
||
"*Non-nil means \\[indent-new-comment-line] should continue same comment
|
||
on new line, with no new terminator or starter.
|
||
This is obsolete because you might as well use \\[newline-and-indent].")
|
||
|
||
(defun indent-new-comment-line ()
|
||
"Break line at point and indent, continuing comment if presently within one.
|
||
The body of the continued comment is indented under the previous comment line.
|
||
|
||
This command is intended for styles where you write a comment per line,
|
||
starting a new comment (and terminating it if necessary) on each line.
|
||
If you want to continue one comment across several lines, use \\[newline-and-indent]."
|
||
(interactive "*")
|
||
(let (comcol comstart)
|
||
(skip-chars-backward " \t")
|
||
(delete-region (point)
|
||
(progn (skip-chars-forward " \t")
|
||
(point)))
|
||
(insert ?\n)
|
||
(if (not comment-multi-line)
|
||
(save-excursion
|
||
(if (and comment-start-skip
|
||
(let ((opoint (point)))
|
||
(forward-line -1)
|
||
(re-search-forward comment-start-skip opoint t)))
|
||
;; The old line is a comment.
|
||
;; Set WIN to the pos of the comment-start.
|
||
;; But if the comment is empty, look at preceding lines
|
||
;; to find one that has a nonempty comment.
|
||
(let ((win (match-beginning 0)))
|
||
(while (and (eolp) (not (bobp))
|
||
(let (opoint)
|
||
(beginning-of-line)
|
||
(setq opoint (point))
|
||
(forward-line -1)
|
||
(re-search-forward comment-start-skip opoint t)))
|
||
(setq win (match-beginning 0)))
|
||
;; Indent this line like what we found.
|
||
(goto-char win)
|
||
(setq comcol (current-column))
|
||
(setq comstart (buffer-substring (point) (match-end 0)))))))
|
||
(if comcol
|
||
(let ((comment-column comcol)
|
||
(comment-start comstart)
|
||
(comment-end comment-end))
|
||
(and comment-end (not (equal comment-end ""))
|
||
; (if (not comment-multi-line)
|
||
(progn
|
||
(forward-char -1)
|
||
(insert comment-end)
|
||
(forward-char 1))
|
||
; (setq comment-column (+ comment-column (length comment-start))
|
||
; comment-start "")
|
||
; )
|
||
)
|
||
(if (not (eolp))
|
||
(setq comment-end ""))
|
||
(insert ?\n)
|
||
(forward-char -1)
|
||
(indent-for-comment)
|
||
(save-excursion
|
||
;; Make sure we delete the newline inserted above.
|
||
(end-of-line)
|
||
(delete-char 1)))
|
||
(if fill-prefix
|
||
(insert fill-prefix)
|
||
(indent-according-to-mode)))))
|
||
|
||
(defun auto-fill-mode (&optional arg)
|
||
"Toggle auto-fill mode.
|
||
With arg, turn auto-fill mode on if and only if arg is positive.
|
||
In auto-fill mode, inserting a space at a column beyond fill-column
|
||
automatically breaks the line at a previous space."
|
||
(interactive "P")
|
||
(prog1 (setq auto-fill-function
|
||
(if (if (null arg)
|
||
(not auto-fill-function)
|
||
(> (prefix-numeric-value arg) 0))
|
||
'do-auto-fill
|
||
nil))
|
||
;; update mode-line
|
||
(set-buffer-modified-p (buffer-modified-p))))
|
||
|
||
(defun turn-on-auto-fill ()
|
||
"Unconditionally turn on Auto Fill mode."
|
||
(auto-fill-mode 1))
|
||
|
||
(defun set-fill-column (arg)
|
||
"Set `fill-column' to current column, or to argument if given.
|
||
The variable `fill-column' has a separate value for each buffer."
|
||
(interactive "P")
|
||
(setq fill-column (if (integerp arg) arg (current-column)))
|
||
(message "fill-column set to %d" fill-column))
|
||
|
||
(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 (selected-window)))
|
||
(princ "selective-display set to " t)
|
||
(prin1 selective-display t)
|
||
(princ "." t))
|
||
|
||
(defconst overwrite-mode-textual " Ovwrt"
|
||
"The string displayed in the mode line when in overwrite mode.")
|
||
(defconst overwrite-mode-binary " Bin Ovwrt"
|
||
"The string displayed in the mode line when in binary overwrite mode.")
|
||
|
||
(defun overwrite-mode (arg)
|
||
"Toggle overwrite mode.
|
||
With arg, turn overwrite mode on iff arg is positive.
|
||
In overwrite mode, 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."
|
||
(interactive "P")
|
||
(setq overwrite-mode
|
||
(if (if (null arg) (not overwrite-mode)
|
||
(> (prefix-numeric-value arg) 0))
|
||
'overwrite-mode-textual))
|
||
(force-mode-line-update))
|
||
|
||
(defun binary-overwrite-mode (arg)
|
||
"Toggle binary overwrite mode.
|
||
With arg, turn binary overwrite mode on iff arg is positive.
|
||
In binary overwrite mode, 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'."
|
||
(interactive "P")
|
||
(setq overwrite-mode
|
||
(if (if (null arg)
|
||
(not (eq overwrite-mode 'overwrite-mode-binary))
|
||
(> (prefix-numeric-value arg) 0))
|
||
'overwrite-mode-binary))
|
||
(force-mode-line-update))
|
||
|
||
(defvar line-number-mode nil
|
||
"*Non-nil means display line number in mode line.")
|
||
|
||
(defun line-number-mode (arg)
|
||
"Toggle Line Number mode.
|
||
With arg, turn Line Number mode on iff arg is positive.
|
||
When Line Number mode is enabled, the line number appears
|
||
in the mode line."
|
||
(interactive "P")
|
||
(setq line-number-mode
|
||
(if (null arg) (not line-number-mode)
|
||
(> (prefix-numeric-value arg) 0)))
|
||
(force-mode-line-update))
|
||
|
||
(defvar blink-matching-paren t
|
||
"*Non-nil means show matching open-paren when close-paren is inserted.")
|
||
|
||
(defconst blink-matching-paren-distance 12000
|
||
"*If non-nil, is maximum distance to search for matching open-paren.")
|
||
|
||
(defun blink-matching-open ()
|
||
"Move cursor momentarily to the beginning of the sexp before point."
|
||
(interactive)
|
||
(and (> (point) (1+ (point-min)))
|
||
(not (memq (char-syntax (char-after (- (point) 2))) '(?/ ?\\ )))
|
||
blink-matching-paren
|
||
(let* ((oldpos (point))
|
||
(blinkpos)
|
||
(mismatch))
|
||
(save-excursion
|
||
(save-restriction
|
||
(if blink-matching-paren-distance
|
||
(narrow-to-region (max (point-min)
|
||
(- (point) blink-matching-paren-distance))
|
||
oldpos))
|
||
(condition-case ()
|
||
(setq blinkpos (scan-sexps oldpos -1))
|
||
(error nil)))
|
||
(and blinkpos (/= (char-syntax (char-after blinkpos))
|
||
?\$)
|
||
(setq mismatch
|
||
(/= (char-after (1- oldpos))
|
||
(logand (lsh (aref (syntax-table)
|
||
(char-after blinkpos))
|
||
-8)
|
||
255))))
|
||
(if mismatch (setq blinkpos nil))
|
||
(if blinkpos
|
||
(progn
|
||
(goto-char blinkpos)
|
||
(if (pos-visible-in-window-p)
|
||
(sit-for 1)
|
||
(goto-char blinkpos)
|
||
(message
|
||
"Matches %s"
|
||
(if (save-excursion
|
||
(skip-chars-backward " \t")
|
||
(not (bolp)))
|
||
(buffer-substring (progn (beginning-of-line) (point))
|
||
(1+ blinkpos))
|
||
(buffer-substring blinkpos
|
||
(progn
|
||
(forward-char 1)
|
||
(skip-chars-forward "\n \t")
|
||
(end-of-line)
|
||
(point)))))))
|
||
(cond (mismatch
|
||
(message "Mismatched parentheses"))
|
||
((not blink-matching-paren-distance)
|
||
(message "Unmatched parenthesis"))))))))
|
||
|
||
;Turned off because it makes dbx bomb out.
|
||
(setq blink-paren-function 'blink-matching-open)
|
||
|
||
;; 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)
|
||
(deactivate-mark)
|
||
(signal 'quit nil))
|
||
|
||
(define-key global-map "\C-g" 'keyboard-quit)
|
||
|
||
(defun set-variable (var val)
|
||
"Set VARIABLE to VALUE. VALUE is a Lisp object.
|
||
When using this interactively, supply a Lisp expression for VALUE.
|
||
If you want VALUE to be a string, you must surround it with doublequotes.
|
||
|
||
If VARIABLE has a `variable-interactive' property, that is used as if
|
||
it were the arg to `interactive' (which see) to interactively read the value."
|
||
(interactive
|
||
(let* ((var (read-variable "Set variable: "))
|
||
(minibuffer-help-form
|
||
'(funcall myhelp))
|
||
(myhelp
|
||
(function
|
||
(lambda ()
|
||
(with-output-to-temp-buffer "*Help*"
|
||
(prin1 var)
|
||
(princ "\nDocumentation:\n")
|
||
(princ (substring (documentation-property var 'variable-documentation)
|
||
1))
|
||
(if (boundp var)
|
||
(let ((print-length 20))
|
||
(princ "\n\nCurrent value: ")
|
||
(prin1 (symbol-value var))))
|
||
nil)))))
|
||
(list var
|
||
(let ((prop (get var 'variable-interactive)))
|
||
(if prop
|
||
;; Use VAR's `variable-interactive' property
|
||
;; as an interactive spec for prompting.
|
||
(call-interactively (list 'lambda '(arg)
|
||
(list 'interactive prop)
|
||
'arg))
|
||
(eval-minibuffer (format "Set %s to value: " var)))))))
|
||
(set var val))
|
||
|
||
;; Define the major mode for lists of completions.
|
||
|
||
(defvar completion-list-mode-map nil)
|
||
(or completion-list-mode-map
|
||
(let ((map (make-sparse-keymap)))
|
||
(define-key map [mouse-2] 'mouse-choose-completion)
|
||
(setq completion-list-mode-map map)))
|
||
|
||
;; Completion mode is suitable only for specially formatted data.
|
||
(put 'completion-list-mode 'mode-class 'special)
|
||
|
||
(defun completion-list-mode ()
|
||
"Major mode for buffers showing lists of possible completions.
|
||
Type \\<completion-list-mode-map>\\[mouse-choose-completion] to select
|
||
a completion with the mouse."
|
||
(interactive)
|
||
(kill-all-local-variables)
|
||
(use-local-map completion-list-mode-map)
|
||
(setq mode-name "Completion List")
|
||
(setq major-mode 'completion-list-mode)
|
||
(run-hooks 'completion-list-mode-hook))
|
||
|
||
(defun completion-setup-function ()
|
||
(save-excursion
|
||
(completion-list-mode)
|
||
(goto-char (point-min))
|
||
(if window-system
|
||
(insert (substitute-command-keys
|
||
"Click \\[mouse-choose-completion] on a completion to select it.\n\n")))))
|
||
|
||
(add-hook 'completion-setup-hook 'completion-setup-function)
|
||
|
||
;;;; 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.
|
||
(mapcar
|
||
(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))))
|
||
'((kp-0 ?0) (kp-1 ?1) (kp-2 ?2) (kp-3 ?3) (kp-4 ?4)
|
||
(kp-5 ?5) (kp-6 ?6) (kp-7 ?7) (kp-8 ?8) (kp-9 ?9)
|
||
(kp-space ?\ )
|
||
(kp-tab ?\t)
|
||
(kp-enter ?\r)
|
||
(kp-multiply ?*)
|
||
(kp-add ?+)
|
||
(kp-separator ?,)
|
||
(kp-subtract ?-)
|
||
(kp-decimal ?.)
|
||
(kp-divide ?/)
|
||
(kp-equal ?=)))
|
||
|
||
;;; simple.el ends here
|