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https://git.savannah.gnu.org/git/emacs.git
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c93a62d8c1
(c-electric-backspace): Must get 'supercede property values to work with delsel and pending-del. (c-electric-brace): Fix ebola eradication consequence in the preserve-p test.
1375 lines
47 KiB
EmacsLisp
1375 lines
47 KiB
EmacsLisp
;;; cc-cmds.el --- user level commands for CC Mode
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;; Copyright (C) 1985,87,92,93,94,95,96,97 Free Software Foundation, Inc.
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;; Authors: 1992-1997 Barry A. Warsaw
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;; 1987 Dave Detlefs and Stewart Clamen
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;; 1985 Richard M. Stallman
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;; Maintainer: cc-mode-help@python.org
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;; Created: 22-Apr-1997 (split from cc-mode.el)
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;; Version: 5.13
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;; Keywords: c languages oop
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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 the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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(eval-when-compile
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(require 'cc-defs))
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(defun c-calculate-state (arg prevstate)
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;; Calculate the new state of PREVSTATE, t or nil, based on arg. If
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;; arg is nil or zero, toggle the state. If arg is negative, turn
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;; the state off, and if arg is positive, turn the state on
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(if (or (not arg)
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(zerop (setq arg (prefix-numeric-value arg))))
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(not prevstate)
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(> arg 0)))
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;; Auto-newline and hungry-delete
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(defun c-toggle-auto-state (arg)
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"Toggle auto-newline feature.
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Optional numeric ARG, if supplied turns on auto-newline when positive,
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turns it off when negative, and just toggles it when zero.
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When the auto-newline feature is enabled (as evidenced by the `/a' or
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`/ah' on the modeline after the mode name) newlines are automatically
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inserted after special characters such as brace, comma, semi-colon,
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and colon."
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(interactive "P")
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(setq c-auto-newline (c-calculate-state arg c-auto-newline))
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(c-update-modeline)
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(c-keep-region-active))
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(defun c-toggle-hungry-state (arg)
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"Toggle hungry-delete-key feature.
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Optional numeric ARG, if supplied turns on hungry-delete when positive,
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turns it off when negative, and just toggles it when zero.
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When the hungry-delete-key feature is enabled (as evidenced by the
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`/h' or `/ah' on the modeline after the mode name) the delete key
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gobbles all preceding whitespace in one fell swoop."
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(interactive "P")
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(setq c-hungry-delete-key (c-calculate-state arg c-hungry-delete-key))
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(c-update-modeline)
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(c-keep-region-active))
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(defun c-toggle-auto-hungry-state (arg)
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"Toggle auto-newline and hungry-delete-key features.
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Optional numeric ARG, if supplied turns on auto-newline and
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hungry-delete when positive, turns them off when negative, and just
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toggles them when zero.
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See `c-toggle-auto-state' and `c-toggle-hungry-state' for details."
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(interactive "P")
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(setq c-auto-newline (c-calculate-state arg c-auto-newline))
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(setq c-hungry-delete-key (c-calculate-state arg c-hungry-delete-key))
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(c-update-modeline)
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(c-keep-region-active))
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;; Electric keys
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;; Note: In XEmacs 20.3 the Delete and BackSpace keysyms have been
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;; separated and "\177" is no longer an alias for both keys. Also,
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;; the variable delete-key-deletes-forward controls in which direction
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;; the Delete keysym deletes characters. The functions
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;; c-electric-delete and c-electric-backspace attempt to deal with
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;; this new functionality. For Emacs 19 and XEmacs 19 backwards
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;; compatibility, the old behavior has moved to c-electric-backspace
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;; and c-backspace-function.
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(defun c-electric-backspace (arg)
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"Deletes preceding character or whitespace.
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If `c-hungry-delete-key' is non-nil, as evidenced by the \"/h\" or
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\"/ah\" string on the mode line, then all preceding whitespace is
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consumed. If however an ARG is supplied, or `c-hungry-delete-key' is
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nil, or point is inside a literal then the function in the variable
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`c-backspace-function' is called.
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See also \\[c-electric-delete]."
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(interactive "P")
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(if (or (not c-hungry-delete-key)
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arg
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(c-in-literal))
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(funcall c-backspace-function (prefix-numeric-value arg))
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(let ((here (point)))
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(skip-chars-backward " \t\n")
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(if (/= (point) here)
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(delete-region (point) here)
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(funcall c-backspace-function 1)
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))))
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(defun c-electric-delete (arg)
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"Deletes preceding or following character or whitespace.
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The behavior of this function depends on the variable
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`delete-key-deletes-forward'. If this variable is nil (or does not
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exist, as in older Emacsen), then this function behaves identical to
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\\[c-electric-backspace].
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If `delete-key-deletes-forward' is non-nil, then deletion occurs in
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the forward direction. So if `c-hungry-delete-key' is non-nil, as
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evidenced by the \"/h\" or \"/ah\" string on the mode line, then all
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following whitespace is consumed. If however an ARG is supplied, or
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`c-hungry-delete-key' is nil, or point is inside a literal then the
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function in the variable `c-delete-function' is called."
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(interactive "P")
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(if (and (boundp 'delete-key-deletes-forward)
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delete-key-deletes-forward)
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(if (or (not c-hungry-delete-key)
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arg
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(c-in-literal))
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(funcall c-delete-function (prefix-numeric-value arg))
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(let ((here (point)))
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(skip-chars-forward " \t\n")
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(if (/= (point) here)
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(delete-region (point) here)
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(funcall c-delete-function 1))))
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;; act just like c-electric-backspace
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(c-electric-backspace arg)))
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(defun c-electric-pound (arg)
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"Electric pound (`#') insertion.
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Inserts a `#' character specially depending on the variable
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`c-electric-pound-behavior'. If a numeric ARG is supplied, or if
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point is inside a literal, nothing special happens."
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(interactive "P")
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(if (or (c-in-literal)
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arg
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(not (memq 'alignleft c-electric-pound-behavior)))
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;; do nothing special
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(self-insert-command (prefix-numeric-value arg))
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;; place the pound character at the left edge
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(let ((pos (- (point-max) (point)))
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(bolp (bolp)))
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(beginning-of-line)
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(delete-horizontal-space)
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(insert-char last-command-char 1)
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(and (not bolp)
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(goto-char (- (point-max) pos)))
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)))
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(defun c-electric-brace (arg)
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"Insert a brace.
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If the auto-newline feature is turned on, as evidenced by the \"/a\"
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or \"/ah\" string on the mode line, newlines are inserted before and
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after braces based on the value of `c-hanging-braces-alist'.
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Also, the line is re-indented unless a numeric ARG is supplied, there
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are non-whitespace characters present on the line after the brace, or
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the brace is inserted inside a literal."
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(interactive "P")
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(let* ((c-state-cache (c-parse-state))
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(safepos (c-safe-position (point) c-state-cache))
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(literal (c-in-literal safepos)))
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;; if we're in a literal, or we're not at the end of the line, or
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;; a numeric arg is provided, or auto-newlining is turned off,
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;; then just insert the character.
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(if (or literal arg
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; (not c-auto-newline)
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(not (looking-at "[ \t]*$")))
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(self-insert-command (prefix-numeric-value arg))
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(let* ((syms '(class-open class-close defun-open defun-close
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inline-open inline-close brace-list-open brace-list-close
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brace-list-intro brace-list-entry block-open block-close
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substatement-open statement-case-open
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extern-lang-open extern-lang-close))
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;; we want to inhibit blinking the paren since this will
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;; be most disruptive. we'll blink it ourselves later on
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(old-blink-paren blink-paren-function)
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blink-paren-function
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(insertion-point (point))
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delete-temp-newline
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(preserve-p (eq ?\ (char-syntax (char-before))))
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;; shut this up too
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(c-echo-syntactic-information-p nil)
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(syntax (progn
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;; only insert a newline if there is
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;; non-whitespace behind us
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(if (save-excursion
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(skip-chars-backward " \t")
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(not (bolp)))
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(progn (newline)
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(setq delete-temp-newline t)))
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(self-insert-command (prefix-numeric-value arg))
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;; state cache doesn't change
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(c-guess-basic-syntax)))
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(newlines (and
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c-auto-newline
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(or (c-lookup-lists syms syntax c-hanging-braces-alist)
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'(ignore before after)))))
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;; If syntax is a function symbol, then call it using the
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;; defined semantics.
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(if (and (not (consp (cdr newlines)))
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(functionp (cdr newlines)))
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(let ((c-syntactic-context syntax))
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(setq newlines
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(funcall (cdr newlines) (car newlines) insertion-point))))
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;; does a newline go before the open brace?
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(if (memq 'before newlines)
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;; we leave the newline we've put in there before,
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;; but we need to re-indent the line above
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(let ((pos (- (point-max) (point)))
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(here (point))
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(c-state-cache c-state-cache))
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(forward-line -1)
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;; we may need to update the cache. this should still be
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;; faster than recalculating the state in many cases
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(save-excursion
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(save-restriction
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(narrow-to-region here (point))
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(if (and (c-safe (progn (backward-up-list -1) t))
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(memq (char-before) '(?\) ?}))
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(progn (widen)
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(c-safe (progn (forward-sexp -1) t))))
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(setq c-state-cache
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(c-hack-state (point) 'open c-state-cache))
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(if (and (car c-state-cache)
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(not (consp (car c-state-cache)))
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(<= (point) (car c-state-cache)))
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(setq c-state-cache (cdr c-state-cache))
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))))
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(let ((here (point))
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(shift (c-indent-line)))
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(setq c-state-cache (c-adjust-state (c-point 'bol) here
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(- shift) c-state-cache)))
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(goto-char (- (point-max) pos))
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;; if the buffer has changed due to the indentation, we
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;; need to recalculate syntax for the current line, but
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;; we won't need to update the state cache.
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(if (/= (point) here)
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(setq syntax (c-guess-basic-syntax))))
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;; must remove the newline we just stuck in (if we really did it)
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(and delete-temp-newline
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(save-excursion
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;; if there is whitespace before point, then preserve
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;; at least one space.
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(delete-indentation)
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(just-one-space)
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(if (not preserve-p)
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(delete-char -1))))
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;; since we're hanging the brace, we need to recalculate
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;; syntax. Update the state to accurately reflect the
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;; beginning of the line. We punt if we cross any open or
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;; closed parens because its just too hard to modify the
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;; known state. This limitation will be fixed in v5.
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(save-excursion
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(let ((bol (c-point 'bol)))
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(if (zerop (car (parse-partial-sexp bol (1- (point)))))
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(setq c-state-cache (c-whack-state bol c-state-cache)
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syntax (c-guess-basic-syntax))
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;; gotta punt. this requires some horrible kludgery
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(beginning-of-line)
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(makunbound 'c-state-cache)
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(setq c-state-cache (c-parse-state)
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syntax nil))))
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)
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;; now adjust the line's indentation. don't update the state
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;; cache since c-guess-basic-syntax isn't called when the
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;; syntax is passed to c-indent-line
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(let ((here (point))
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(shift (c-indent-line syntax)))
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(setq c-state-cache (c-adjust-state (c-point 'bol) here
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(- shift) c-state-cache)))
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;; Do all appropriate clean ups
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(let ((here (point))
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(pos (- (point-max) (point)))
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mbeg mend)
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;; clean up empty defun braces
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(if (and c-auto-newline
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(memq 'empty-defun-braces c-cleanup-list)
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(eq last-command-char ?\})
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(c-intersect-lists '(defun-close class-close inline-close)
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syntax)
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(progn
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(forward-char -1)
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(skip-chars-backward " \t\n")
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(eq (char-before) ?\{))
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;; make sure matching open brace isn't in a comment
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(not (c-in-literal)))
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(delete-region (point) (1- here)))
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;; clean up brace-else-brace
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(if (and c-auto-newline
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(memq 'brace-else-brace c-cleanup-list)
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(eq last-command-char ?\{)
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(re-search-backward "}[ \t\n]*else[ \t\n]*{" nil t)
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(progn
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(setq mbeg (match-beginning 0)
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mend (match-end 0))
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(= mend here))
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(not (c-in-literal)))
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(progn
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(delete-region mbeg mend)
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(insert "} else {")))
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;; clean up brace-elseif-brace
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(if (and c-auto-newline
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(memq 'brace-elseif-brace c-cleanup-list)
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(eq last-command-char ?\{)
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(re-search-backward "}[ \t\n]*else[ \t\n]+if[ \t\n]*" nil t)
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(save-excursion
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(goto-char (match-end 0))
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(c-safe (forward-sexp 1))
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(skip-chars-forward " \t\n")
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(setq mbeg (match-beginning 0)
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mend (match-end 0))
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(= here (1+ (point))))
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(not (c-in-literal)))
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(progn
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(delete-region mbeg mend)
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(insert "} else if ")))
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(goto-char (- (point-max) pos))
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)
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;; does a newline go after the brace?
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(if (memq 'after newlines)
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(progn
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(newline)
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;; update on c-state-cache
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(let* ((bufpos (- (point) 2))
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(which (if (eq (char-after bufpos) ?{) 'open 'close))
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(c-state-cache (c-hack-state bufpos which c-state-cache)))
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(c-indent-line))))
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;; blink the paren
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(and (eq last-command-char ?\})
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old-blink-paren
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(save-excursion
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(c-backward-syntactic-ws safepos)
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(funcall old-blink-paren)))
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))))
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(defun c-electric-slash (arg)
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"Insert a slash character.
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If slash is second of a double-slash C++ style comment introducing
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construct, and we are on a comment-only-line, indent line as comment.
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If numeric ARG is supplied or point is inside a literal, indentation
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is inhibited."
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(interactive "P")
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(let ((indentp (and (not arg)
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(eq (char-before) ?/)
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(eq last-command-char ?/)
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(not (c-in-literal))))
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;; shut this up
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(c-echo-syntactic-information-p nil))
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(self-insert-command (prefix-numeric-value arg))
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(if indentp
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(c-indent-line))))
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(defun c-electric-star (arg)
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"Insert a star character.
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If the star is the second character of a C style comment introducing
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construct, and we are on a comment-only-line, indent line as comment.
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If numeric ARG is supplied or point is inside a literal, indentation
|
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is inhibited."
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(interactive "P")
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(self-insert-command (prefix-numeric-value arg))
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;; if we are in a literal, or if arg is given do not re-indent the
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;; current line, unless this star introduces a comment-only line.
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(if (and (not arg)
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(memq (c-in-literal) '(c))
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(eq (char-before) ?*)
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(save-excursion
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(forward-char -1)
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(skip-chars-backward "*")
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(if (eq (char-before) ?/)
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(forward-char -1))
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(skip-chars-backward " \t")
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(bolp)))
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;; shut this up
|
||
(let (c-echo-syntactic-information-p)
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(c-indent-line))
|
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))
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(defun c-electric-semi&comma (arg)
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"Insert a comma or semicolon.
|
||
When the auto-newline feature is turned on, as evidenced by the \"/a\"
|
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or \"/ah\" string on the mode line, a newline might be inserted. See
|
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the variable `c-hanging-semi&comma-criteria' for how newline insertion
|
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is determined.
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||
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When semicolon is inserted, the line is re-indented unless a numeric
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arg is supplied, point is inside a literal, or there are
|
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non-whitespace characters on the line following the semicolon."
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||
(interactive "P")
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||
(let* ((lim (c-most-enclosing-brace (c-parse-state)))
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||
(literal (c-in-literal lim))
|
||
(here (point))
|
||
;; shut this up
|
||
(c-echo-syntactic-information-p nil))
|
||
(if (or literal
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||
arg
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(not (looking-at "[ \t]*$")))
|
||
(self-insert-command (prefix-numeric-value arg))
|
||
;; do some special stuff with the character
|
||
(self-insert-command (prefix-numeric-value arg))
|
||
;; do all cleanups, reindentations, and newline insertions, but
|
||
;; only if c-auto-newline is turned on
|
||
(if (not c-auto-newline) nil
|
||
;; clean ups
|
||
(let ((pos (- (point-max) (point))))
|
||
(if (and (or (and
|
||
(eq last-command-char ?,)
|
||
(memq 'list-close-comma c-cleanup-list))
|
||
(and
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||
(eq last-command-char ?\;)
|
||
(memq 'defun-close-semi c-cleanup-list)))
|
||
(progn
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||
(forward-char -1)
|
||
(skip-chars-backward " \t\n")
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||
(eq (char-before) ?}))
|
||
;; make sure matching open brace isn't in a comment
|
||
(not (c-in-literal lim)))
|
||
(delete-region (point) here))
|
||
(goto-char (- (point-max) pos)))
|
||
;; re-indent line
|
||
(c-indent-line)
|
||
;; check to see if a newline should be added
|
||
(let ((criteria c-hanging-semi&comma-criteria)
|
||
answer add-newline-p)
|
||
(while criteria
|
||
(setq answer (funcall (car criteria)))
|
||
;; only nil value means continue checking
|
||
(if (not answer)
|
||
(setq criteria (cdr criteria))
|
||
(setq criteria nil)
|
||
;; only 'stop specifically says do not add a newline
|
||
(setq add-newline-p (not (eq answer 'stop)))
|
||
))
|
||
(if add-newline-p
|
||
(progn (newline)
|
||
(c-indent-line)))
|
||
)))))
|
||
|
||
(defun c-electric-colon (arg)
|
||
"Insert a colon.
|
||
|
||
If the auto-newline feature is turned on, as evidenced by the \"/a\"
|
||
or \"/ah\" string on the mode line, newlines are inserted before and
|
||
after colons based on the value of `c-hanging-colons-alist'.
|
||
|
||
Also, the line is re-indented unless a numeric ARG is supplied, there
|
||
are non-whitespace characters present on the line after the colon, or
|
||
the colon is inserted inside a literal.
|
||
|
||
This function cleans up double colon scope operators based on the
|
||
value of `c-cleanup-list'."
|
||
(interactive "P")
|
||
(let* ((bod (c-point 'bod))
|
||
(literal (c-in-literal bod))
|
||
syntax newlines
|
||
;; shut this up
|
||
(c-echo-syntactic-information-p nil))
|
||
(if (or literal
|
||
arg
|
||
(not (looking-at "[ \t]*$")))
|
||
(self-insert-command (prefix-numeric-value arg))
|
||
;; insert the colon, then do any specified cleanups
|
||
(self-insert-command (prefix-numeric-value arg))
|
||
(let ((pos (- (point-max) (point)))
|
||
(here (point)))
|
||
(if (and c-auto-newline
|
||
(memq 'scope-operator c-cleanup-list)
|
||
(eq (char-before) ?:)
|
||
(progn
|
||
(forward-char -1)
|
||
(skip-chars-backward " \t\n")
|
||
(eq (char-before) ?:))
|
||
(not (c-in-literal))
|
||
(not (eq (char-after (- (point) 2)) ?:)))
|
||
(delete-region (point) (1- here)))
|
||
(goto-char (- (point-max) pos)))
|
||
;; lets do some special stuff with the colon character
|
||
(setq syntax (c-guess-basic-syntax)
|
||
;; some language elements can only be determined by
|
||
;; checking the following line. Lets first look for ones
|
||
;; that can be found when looking on the line with the
|
||
;; colon
|
||
newlines
|
||
(and c-auto-newline
|
||
(or (c-lookup-lists '(case-label label access-label)
|
||
syntax c-hanging-colons-alist)
|
||
(c-lookup-lists '(member-init-intro inher-intro)
|
||
(prog2
|
||
(insert "\n")
|
||
(c-guess-basic-syntax)
|
||
(delete-char -1))
|
||
c-hanging-colons-alist))))
|
||
;; indent the current line
|
||
(c-indent-line syntax)
|
||
;; does a newline go before the colon? Watch out for already
|
||
;; non-hung colons. However, we don't unhang them because that
|
||
;; would be a cleanup (and anti-social).
|
||
(if (and (memq 'before newlines)
|
||
(save-excursion
|
||
(skip-chars-backward ": \t")
|
||
(not (bolp))))
|
||
(let ((pos (- (point-max) (point))))
|
||
(forward-char -1)
|
||
(newline)
|
||
(c-indent-line)
|
||
(goto-char (- (point-max) pos))))
|
||
;; does a newline go after the colon?
|
||
(if (memq 'after (cdr-safe newlines))
|
||
(progn
|
||
(newline)
|
||
(c-indent-line)))
|
||
)))
|
||
|
||
(defun c-electric-lt-gt (arg)
|
||
"Insert a less-than, or greater-than character.
|
||
When the auto-newline feature is turned on, as evidenced by the \"/a\"
|
||
or \"/ah\" string on the mode line, the line will be re-indented if
|
||
the character inserted is the second of a C++ style stream operator
|
||
and the buffer is in C++ mode.
|
||
|
||
The line will also not be re-indented if a numeric argument is
|
||
supplied, or point is inside a literal."
|
||
(interactive "P")
|
||
(let ((indentp (and (not arg)
|
||
(eq (char-before) last-command-char)
|
||
(not (c-in-literal))))
|
||
;; shut this up
|
||
(c-echo-syntactic-information-p nil))
|
||
(self-insert-command (prefix-numeric-value arg))
|
||
(if indentp
|
||
(c-indent-line))))
|
||
|
||
|
||
|
||
;; better movement routines for ThisStyleOfVariablesCommonInCPlusPlus
|
||
;; originally contributed by Terry_Glanfield.Southern@rxuk.xerox.com
|
||
(defun c-forward-into-nomenclature (&optional arg)
|
||
"Move forward to end of a nomenclature section or word.
|
||
With arg, to it arg times."
|
||
(interactive "p")
|
||
(let ((case-fold-search nil))
|
||
(if (> arg 0)
|
||
(re-search-forward "\\W*\\([A-Z]*[a-z0-9]*\\)" (point-max) t arg)
|
||
(while (and (< arg 0)
|
||
(re-search-backward
|
||
"\\(\\(\\W\\|[a-z0-9]\\)[A-Z]+\\|\\W\\w+\\)"
|
||
(point-min) 0))
|
||
(forward-char 1)
|
||
(setq arg (1+ arg)))))
|
||
(c-keep-region-active))
|
||
|
||
(defun c-backward-into-nomenclature (&optional arg)
|
||
"Move backward to beginning of a nomenclature section or word.
|
||
With optional ARG, move that many times. If ARG is negative, move
|
||
forward."
|
||
(interactive "p")
|
||
(c-forward-into-nomenclature (- arg))
|
||
(c-keep-region-active))
|
||
|
||
(defun c-scope-operator ()
|
||
"Insert a double colon scope operator at point.
|
||
No indentation or other \"electric\" behavior is performed."
|
||
(interactive)
|
||
(insert "::"))
|
||
|
||
|
||
(defun c-beginning-of-statement (&optional count lim sentence-flag)
|
||
"Go to the beginning of the innermost C statement.
|
||
With prefix arg, go back N - 1 statements. If already at the
|
||
beginning of a statement then go to the beginning of the preceding
|
||
one. If within a string or comment, or next to a comment (only
|
||
whitespace between), move by sentences instead of statements.
|
||
|
||
When called from a program, this function takes 3 optional args: the
|
||
repetition count, a buffer position limit which is the farthest back
|
||
to search, and a flag saying whether to do sentence motion when in a
|
||
comment."
|
||
(interactive (list (prefix-numeric-value current-prefix-arg)
|
||
nil t))
|
||
(let ((here (point))
|
||
(count (or count 1))
|
||
(lim (or lim (c-point 'bod)))
|
||
state)
|
||
(save-excursion
|
||
(goto-char lim)
|
||
(setq state (parse-partial-sexp (point) here nil nil)))
|
||
(if (and sentence-flag
|
||
(or (nth 3 state)
|
||
(nth 4 state)
|
||
; (looking-at (concat "[ \t]*" comment-start-skip))
|
||
(save-excursion
|
||
(skip-chars-backward " \t")
|
||
(goto-char (- (point) 2))
|
||
(looking-at "\\*/"))))
|
||
(forward-sentence (- count))
|
||
(while (> count 0)
|
||
(c-beginning-of-statement-1 lim)
|
||
(setq count (1- count)))
|
||
(while (< count 0)
|
||
(c-end-of-statement-1)
|
||
(setq count (1+ count))))
|
||
;; its possible we've been left up-buf of lim
|
||
(goto-char (max (point) lim))
|
||
)
|
||
(c-keep-region-active))
|
||
|
||
(defun c-end-of-statement (&optional count lim sentence-flag)
|
||
"Go to the end of the innermost C statement.
|
||
|
||
With prefix arg, go forward N - 1 statements. Move forward to end of
|
||
the next statement if already at end. If within a string or comment,
|
||
move by sentences instead of statements.
|
||
|
||
When called from a program, this function takes 3 optional args: the
|
||
repetition count, a buffer position limit which is the farthest back
|
||
to search, and a flag saying whether to do sentence motion when in a
|
||
comment."
|
||
(interactive (list (prefix-numeric-value current-prefix-arg)
|
||
nil t))
|
||
(c-beginning-of-statement (- (or count 1)) lim sentence-flag)
|
||
(c-keep-region-active))
|
||
|
||
|
||
;; set up electric character functions to work with pending-del,
|
||
;; (a.k.a. delsel) mode. All symbols get the t value except
|
||
;; the functions which delete, which gets 'supersede.
|
||
(mapcar
|
||
(function
|
||
(lambda (sym)
|
||
(put sym 'delete-selection t) ; for delsel (Emacs)
|
||
(put sym 'pending-delete t))) ; for pending-del (XEmacs)
|
||
'(c-electric-pound
|
||
c-electric-brace
|
||
c-electric-slash
|
||
c-electric-star
|
||
c-electric-semi&comma
|
||
c-electric-lt-gt
|
||
c-electric-colon))
|
||
(put 'c-electric-delete 'delete-selection 'supersede) ; delsel
|
||
(put 'c-electric-delete 'pending-delete 'supersede) ; pending-del
|
||
(put 'c-electric-backspace 'delete-selection 'supersede) ; delsel
|
||
(put 'c-electric-backspace 'pending-delete 'supersede) ; pending-del
|
||
|
||
|
||
;; This is used by indent-for-comment to decide how much to indent a
|
||
;; comment in C code based on its context.
|
||
(defun c-comment-indent ()
|
||
(if (looking-at (concat "^\\(" c-comment-start-regexp "\\)"))
|
||
0 ;Existing comment at bol stays there.
|
||
(let ((opoint (point))
|
||
placeholder)
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(cond
|
||
;; CASE 1: A comment following a solitary close-brace should
|
||
;; have only one space.
|
||
((looking-at (concat "[ \t]*}[ \t]*\\($\\|"
|
||
c-comment-start-regexp
|
||
"\\)"))
|
||
(search-forward "}")
|
||
(1+ (current-column)))
|
||
;; CASE 2: 2 spaces after #endif
|
||
((or (looking-at "^#[ \t]*endif[ \t]*")
|
||
(looking-at "^#[ \t]*else[ \t]*"))
|
||
7)
|
||
;; CASE 3: when comment-column is nil, calculate the offset
|
||
;; according to c-offsets-alist. E.g. identical to hitting
|
||
;; TAB.
|
||
((and c-indent-comments-syntactically-p
|
||
(save-excursion
|
||
(skip-chars-forward " \t")
|
||
(or (looking-at comment-start)
|
||
(eolp))))
|
||
(let ((syntax (c-guess-basic-syntax)))
|
||
;; BOGOSITY ALERT: if we're looking at the eol, its
|
||
;; because indent-for-comment hasn't put the comment-start
|
||
;; in the buffer yet. this will screw up the syntactic
|
||
;; analysis so we kludge in the necessary info. Another
|
||
;; kludge is that if we're at the bol, then we really want
|
||
;; to ignore any anchoring as specified by
|
||
;; c-comment-only-line-offset since it doesn't apply here.
|
||
(if (save-excursion
|
||
(beginning-of-line)
|
||
(skip-chars-forward " \t")
|
||
(eolp))
|
||
(c-add-syntax 'comment-intro))
|
||
(let ((c-comment-only-line-offset
|
||
(if (consp c-comment-only-line-offset)
|
||
c-comment-only-line-offset
|
||
(cons c-comment-only-line-offset
|
||
c-comment-only-line-offset))))
|
||
(apply '+ (mapcar 'c-get-offset syntax)))))
|
||
;; CASE 4: use comment-column if previous line is a
|
||
;; comment-only line indented to the left of comment-column
|
||
((save-excursion
|
||
(beginning-of-line)
|
||
(and (not (bobp))
|
||
(forward-line -1))
|
||
(skip-chars-forward " \t")
|
||
(prog1
|
||
(looking-at c-comment-start-regexp)
|
||
(setq placeholder (point))))
|
||
(goto-char placeholder)
|
||
(if (< (current-column) comment-column)
|
||
comment-column
|
||
(current-column)))
|
||
;; CASE 5: If comment-column is 0, and nothing but space
|
||
;; before the comment, align it at 0 rather than 1.
|
||
((progn
|
||
(goto-char opoint)
|
||
(skip-chars-backward " \t")
|
||
(and (= comment-column 0) (bolp)))
|
||
0)
|
||
;; CASE 6: indent at comment column except leave at least one
|
||
;; space.
|
||
(t (max (1+ (current-column))
|
||
comment-column))
|
||
)))))
|
||
|
||
;; used by outline-minor-mode
|
||
(defun c-outline-level ()
|
||
(save-excursion
|
||
(skip-chars-forward "\t ")
|
||
(current-column)))
|
||
|
||
|
||
(defun c-up-conditional (count)
|
||
"Move back to the containing preprocessor conditional, leaving mark behind.
|
||
A prefix argument acts as a repeat count. With a negative argument,
|
||
move forward to the end of the containing preprocessor conditional.
|
||
When going backwards, `#elif' is treated like `#else' followed by
|
||
`#if'. When going forwards, `#elif' is ignored."
|
||
(interactive "p")
|
||
(c-forward-conditional (- count) t)
|
||
(c-keep-region-active))
|
||
|
||
(defun c-backward-conditional (count &optional up-flag)
|
||
"Move back across a preprocessor conditional, leaving mark behind.
|
||
A prefix argument acts as a repeat count. With a negative argument,
|
||
move forward across a preprocessor conditional."
|
||
(interactive "p")
|
||
(c-forward-conditional (- count) up-flag)
|
||
(c-keep-region-active))
|
||
|
||
(defun c-forward-conditional (count &optional up-flag)
|
||
"Move forward across a preprocessor conditional, leaving mark behind.
|
||
A prefix argument acts as a repeat count. With a negative argument,
|
||
move backward across a preprocessor conditional."
|
||
(interactive "p")
|
||
(let* ((forward (> count 0))
|
||
(increment (if forward -1 1))
|
||
(search-function (if forward 're-search-forward 're-search-backward))
|
||
(new))
|
||
(save-excursion
|
||
(while (/= count 0)
|
||
(let ((depth (if up-flag 0 -1)) found)
|
||
(save-excursion
|
||
;; Find the "next" significant line in the proper direction.
|
||
(while (and (not found)
|
||
;; Rather than searching for a # sign that
|
||
;; comes at the beginning of a line aside from
|
||
;; whitespace, search first for a string
|
||
;; starting with # sign. Then verify what
|
||
;; precedes it. This is faster on account of
|
||
;; the fastmap feature of the regexp matcher.
|
||
(funcall search-function
|
||
"#[ \t]*\\(if\\|elif\\|endif\\)"
|
||
nil t))
|
||
(beginning-of-line)
|
||
;; Now verify it is really a preproc line.
|
||
(if (looking-at "^[ \t]*#[ \t]*\\(if\\|elif\\|endif\\)")
|
||
(let ((prev depth))
|
||
;; Update depth according to what we found.
|
||
(beginning-of-line)
|
||
(cond ((looking-at "[ \t]*#[ \t]*endif")
|
||
(setq depth (+ depth increment)))
|
||
((looking-at "[ \t]*#[ \t]*elif")
|
||
(if (and forward (= depth 0))
|
||
(setq found (point))))
|
||
(t (setq depth (- depth increment))))
|
||
;; If we are trying to move across, and we find an
|
||
;; end before we find a beginning, get an error.
|
||
(if (and (< prev 0) (< depth prev))
|
||
(error (if forward
|
||
"No following conditional at this level"
|
||
"No previous conditional at this level")))
|
||
;; When searching forward, start from next line so
|
||
;; that we don't find the same line again.
|
||
(if forward (forward-line 1))
|
||
;; If this line exits a level of conditional, exit
|
||
;; inner loop.
|
||
(if (< depth 0)
|
||
(setq found (point))))
|
||
;; else
|
||
(if forward (forward-line 1))
|
||
)))
|
||
(or found
|
||
(error "No containing preprocessor conditional"))
|
||
(goto-char (setq new found)))
|
||
(setq count (+ count increment))))
|
||
(push-mark)
|
||
(goto-char new))
|
||
(c-keep-region-active))
|
||
|
||
|
||
;; commands to indent lines, regions, defuns, and expressions
|
||
(defun c-indent-command (&optional whole-exp)
|
||
"Indent current line as C code, and/or insert some whitespace.
|
||
|
||
If `c-tab-always-indent' is t, always just indent the current line.
|
||
If nil, indent the current line only if point is at the left margin or
|
||
in the line's indentation; otherwise insert some whitespace[*]. If
|
||
other than nil or t, then some whitespace[*] is inserted only within
|
||
literals (comments and strings) and inside preprocessor directives,
|
||
but the line is always reindented.
|
||
|
||
A numeric argument, regardless of its value, means indent rigidly all
|
||
the lines of the expression starting after point so that this line
|
||
becomes properly indented. The relative indentation among the lines
|
||
of the expression are preserved.
|
||
|
||
[*] The amount and kind of whitespace inserted is controlled by the
|
||
variable `c-insert-tab-function', which is called to do the actual
|
||
insertion of whitespace. Normally the function in this variable
|
||
just inserts a tab character, or the equivalent number of spaces,
|
||
depending on the variable `indent-tabs-mode'."
|
||
|
||
(interactive "P")
|
||
(let ((bod (c-point 'bod)))
|
||
(if whole-exp
|
||
;; If arg, always indent this line as C
|
||
;; and shift remaining lines of expression the same amount.
|
||
(let ((shift-amt (c-indent-line))
|
||
beg end)
|
||
(save-excursion
|
||
(if (eq c-tab-always-indent t)
|
||
(beginning-of-line))
|
||
(setq beg (point))
|
||
(forward-sexp 1)
|
||
(setq end (point))
|
||
(goto-char beg)
|
||
(forward-line 1)
|
||
(setq beg (point)))
|
||
(if (> end beg)
|
||
(indent-code-rigidly beg end (- shift-amt) "#")))
|
||
;; No arg supplied, use c-tab-always-indent to determine
|
||
;; behavior
|
||
(cond
|
||
;; CASE 1: indent when at column zero or in lines indentation,
|
||
;; otherwise insert a tab
|
||
((not c-tab-always-indent)
|
||
(if (save-excursion
|
||
(skip-chars-backward " \t")
|
||
(not (bolp)))
|
||
(funcall c-insert-tab-function)
|
||
(c-indent-line)))
|
||
;; CASE 2: just indent the line
|
||
((eq c-tab-always-indent t)
|
||
(c-indent-line))
|
||
;; CASE 3: if in a literal, insert a tab, but always indent the
|
||
;; line
|
||
(t
|
||
(if (c-in-literal bod)
|
||
(funcall c-insert-tab-function))
|
||
(c-indent-line)
|
||
)))))
|
||
|
||
(defun c-indent-exp (&optional shutup-p)
|
||
"Indent each line in balanced expression following point.
|
||
Optional SHUTUP-P if non-nil, inhibits message printing and error checking."
|
||
(interactive "P")
|
||
(let ((here (point))
|
||
end progress-p)
|
||
(unwind-protect
|
||
(let ((c-echo-syntactic-information-p nil) ;keep quiet for speed
|
||
(start (progn
|
||
;; try to be smarter about finding the range of
|
||
;; lines to indent. skip all following
|
||
;; whitespace. failing that, try to find any
|
||
;; opening brace on the current line
|
||
(skip-chars-forward " \t\n")
|
||
(if (memq (char-after) '(?\( ?\[ ?\{))
|
||
(point)
|
||
(let ((state (parse-partial-sexp (point)
|
||
(c-point 'eol))))
|
||
(and (nth 1 state)
|
||
(goto-char (nth 1 state))
|
||
(memq (char-after) '(?\( ?\[ ?\{))
|
||
(point)))))))
|
||
;; find balanced expression end
|
||
(setq end (and (c-safe (progn (forward-sexp 1) t))
|
||
(point-marker)))
|
||
;; sanity check
|
||
(and (not start)
|
||
(not shutup-p)
|
||
(error "Cannot find start of balanced expression to indent."))
|
||
(and (not end)
|
||
(not shutup-p)
|
||
(error "Cannot find end of balanced expression to indent."))
|
||
(c-progress-init start end 'c-indent-exp)
|
||
(setq progress-p t)
|
||
(goto-char start)
|
||
(beginning-of-line)
|
||
(while (< (point) end)
|
||
(if (not (looking-at "[ \t]*$"))
|
||
(c-indent-line))
|
||
(c-progress-update)
|
||
(forward-line 1)))
|
||
;; make sure marker is deleted
|
||
(and end
|
||
(set-marker end nil))
|
||
(and progress-p
|
||
(c-progress-fini 'c-indent-exp))
|
||
(goto-char here))))
|
||
|
||
(defun c-indent-defun ()
|
||
"Re-indents the current top-level function def, struct or class declaration."
|
||
(interactive)
|
||
(let ((here (point-marker))
|
||
(c-echo-syntactic-information-p nil)
|
||
(brace (c-least-enclosing-brace (c-parse-state))))
|
||
(if brace
|
||
(goto-char brace)
|
||
(beginning-of-defun))
|
||
;; if we're sitting at b-o-b, it might be because there was no
|
||
;; least enclosing brace and we were sitting on the defun's open
|
||
;; brace.
|
||
(if (and (bobp) (not (eq (char-after) ?\{)))
|
||
(goto-char here))
|
||
;; if defun-prompt-regexp is non-nil, b-o-d might not leave us at
|
||
;; the open brace. I consider this an Emacs bug.
|
||
(and (boundp 'defun-prompt-regexp)
|
||
defun-prompt-regexp
|
||
(looking-at defun-prompt-regexp)
|
||
(goto-char (match-end 0)))
|
||
;; catch all errors in c-indent-exp so we can 1. give more
|
||
;; meaningful error message, and 2. restore point
|
||
(unwind-protect
|
||
(c-indent-exp)
|
||
(goto-char here)
|
||
(set-marker here nil))))
|
||
|
||
(defun c-indent-region (start end)
|
||
;; Indent every line whose first char is between START and END inclusive.
|
||
(save-excursion
|
||
(goto-char start)
|
||
;; Advance to first nonblank line.
|
||
(skip-chars-forward " \t\n")
|
||
(beginning-of-line)
|
||
(let (endmark)
|
||
(unwind-protect
|
||
(let ((c-tab-always-indent t)
|
||
;; shut up any echo msgs on indiv lines
|
||
(c-echo-syntactic-information-p nil)
|
||
fence)
|
||
(c-progress-init start end 'c-indent-region)
|
||
(setq endmark (copy-marker end))
|
||
(while (and (bolp)
|
||
(not (eobp))
|
||
(< (point) endmark))
|
||
;; update progress
|
||
(c-progress-update)
|
||
;; Indent one line as with TAB.
|
||
(let (nextline sexpend sexpbeg)
|
||
;; skip blank lines
|
||
(skip-chars-forward " \t\n")
|
||
(beginning-of-line)
|
||
;; indent the current line
|
||
(c-indent-line)
|
||
(setq fence (point))
|
||
(if (save-excursion
|
||
(beginning-of-line)
|
||
(looking-at "[ \t]*#"))
|
||
(forward-line 1)
|
||
(save-excursion
|
||
;; Find beginning of following line.
|
||
(setq nextline (c-point 'bonl))
|
||
;; Find first beginning-of-sexp for sexp extending past
|
||
;; this line.
|
||
(beginning-of-line)
|
||
(while (< (point) nextline)
|
||
(condition-case nil
|
||
(progn
|
||
(forward-sexp 1)
|
||
(setq sexpend (point)))
|
||
(error (setq sexpend nil)
|
||
(goto-char nextline)))
|
||
(c-forward-syntactic-ws))
|
||
(if sexpend
|
||
(progn
|
||
;; make sure the sexp we found really starts on the
|
||
;; current line and extends past it
|
||
(goto-char sexpend)
|
||
(setq sexpend (point-marker))
|
||
(c-safe (backward-sexp 1))
|
||
(setq sexpbeg (point))))
|
||
(if (and sexpbeg (< sexpbeg fence))
|
||
(setq sexpbeg fence)))
|
||
;; check to see if the next line starts a
|
||
;; comment-only line
|
||
(save-excursion
|
||
(forward-line 1)
|
||
(skip-chars-forward " \t")
|
||
(if (looking-at c-comment-start-regexp)
|
||
(setq sexpbeg (c-point 'bol))))
|
||
;; If that sexp ends within the region, indent it all at
|
||
;; once, fast.
|
||
(condition-case nil
|
||
(if (and sexpend
|
||
(> sexpend nextline)
|
||
(<= sexpend endmark))
|
||
(progn
|
||
(goto-char sexpbeg)
|
||
(c-indent-exp 'shutup)
|
||
(c-progress-update)
|
||
(goto-char sexpend)))
|
||
(error
|
||
(goto-char sexpbeg)
|
||
(c-indent-line)))
|
||
;; Move to following line and try again.
|
||
(and sexpend
|
||
(markerp sexpend)
|
||
(set-marker sexpend nil))
|
||
(forward-line 1)
|
||
(setq fence (point))))))
|
||
(set-marker endmark nil)
|
||
(c-progress-fini 'c-indent-region)
|
||
(c-echo-parsing-error)
|
||
))))
|
||
|
||
(defun c-mark-function ()
|
||
"Put mark at end of a C, C++, or Objective-C defun, point at beginning."
|
||
(interactive)
|
||
(let ((here (point))
|
||
;; there should be a c-point position for 'eod
|
||
(eod (save-excursion (end-of-defun) (point)))
|
||
(state (c-parse-state))
|
||
brace)
|
||
(while state
|
||
(setq brace (car state))
|
||
(if (consp brace)
|
||
(goto-char (cdr brace))
|
||
(goto-char brace))
|
||
(setq state (cdr state)))
|
||
(if (eq (char-after) ?{)
|
||
(progn
|
||
(forward-line -1)
|
||
(while (not (or (bobp)
|
||
(looking-at "[ \t]*$")))
|
||
(forward-line -1)))
|
||
(forward-line 1)
|
||
(skip-chars-forward " \t\n"))
|
||
(push-mark here)
|
||
(push-mark eod nil t)))
|
||
|
||
|
||
;; for progress reporting
|
||
(defvar c-progress-info nil)
|
||
|
||
(defun c-progress-init (start end context)
|
||
;; start the progress update messages. if this emacs doesn't have a
|
||
;; built-in timer, just be dumb about it
|
||
(if (not (fboundp 'current-time))
|
||
(message "indenting region... (this may take a while)")
|
||
;; if progress has already been initialized, do nothing. otherwise
|
||
;; initialize the counter with a vector of:
|
||
;; [start end lastsec context]
|
||
(if c-progress-info
|
||
()
|
||
(setq c-progress-info (vector start
|
||
(save-excursion
|
||
(goto-char end)
|
||
(point-marker))
|
||
(nth 1 (current-time))
|
||
context))
|
||
(message "indenting region..."))))
|
||
|
||
(defun c-progress-update ()
|
||
;; update progress
|
||
(if (not (and c-progress-info c-progress-interval))
|
||
nil
|
||
(let ((now (nth 1 (current-time)))
|
||
(start (aref c-progress-info 0))
|
||
(end (aref c-progress-info 1))
|
||
(lastsecs (aref c-progress-info 2)))
|
||
;; should we update? currently, update happens every 2 seconds,
|
||
;; what's the right value?
|
||
(if (< c-progress-interval (- now lastsecs))
|
||
(progn
|
||
(message "indenting region... (%d%% complete)"
|
||
(/ (* 100 (- (point) start)) (- end start)))
|
||
(aset c-progress-info 2 now)))
|
||
)))
|
||
|
||
(defun c-progress-fini (context)
|
||
;; finished
|
||
(if (or (eq context (aref c-progress-info 3))
|
||
(eq context t))
|
||
(progn
|
||
(set-marker (aref c-progress-info 1) nil)
|
||
(setq c-progress-info nil)
|
||
(message "indenting region...done"))))
|
||
|
||
|
||
|
||
;;; This page handles insertion and removal of backslashes for C macros.
|
||
|
||
(defun c-backslash-region (from to delete-flag)
|
||
"Insert, align, or delete end-of-line backslashes on the lines in the region.
|
||
With no argument, inserts backslashes and aligns existing backslashes.
|
||
With an argument, deletes the backslashes.
|
||
|
||
This function does not modify blank lines at the start of the region.
|
||
If the region ends at the start of a line, it always deletes the
|
||
backslash (if any) at the end of the previous line.
|
||
|
||
You can put the region around an entire macro definition and use this
|
||
command to conveniently insert and align the necessary backslashes."
|
||
(interactive "r\nP")
|
||
(save-excursion
|
||
(goto-char from)
|
||
(let ((column c-backslash-column)
|
||
(endmark (make-marker)))
|
||
(move-marker endmark to)
|
||
;; Compute the smallest column number past the ends of all the lines.
|
||
(if (not delete-flag)
|
||
(while (< (point) to)
|
||
(end-of-line)
|
||
(if (eq (char-before) ?\\)
|
||
(progn (forward-char -1)
|
||
(skip-chars-backward " \t")))
|
||
(setq column (max column (1+ (current-column))))
|
||
(forward-line 1)))
|
||
;; Adjust upward to a tab column, if that doesn't push past the margin.
|
||
(if (> (% column tab-width) 0)
|
||
(let ((adjusted (* (/ (+ column tab-width -1) tab-width) tab-width)))
|
||
(if (< adjusted (window-width))
|
||
(setq column adjusted))))
|
||
;; Don't modify blank lines at start of region.
|
||
(goto-char from)
|
||
(while (and (< (point) endmark) (eolp))
|
||
(forward-line 1))
|
||
;; Add or remove backslashes on all the lines.
|
||
(while (< (point) endmark)
|
||
(if (and (not delete-flag)
|
||
;; Un-backslashify the last line
|
||
;; if the region ends right at the start of the next line.
|
||
(save-excursion
|
||
(forward-line 1)
|
||
(< (point) endmark)))
|
||
(c-append-backslash column)
|
||
(c-delete-backslash))
|
||
(forward-line 1))
|
||
(move-marker endmark nil)))
|
||
(c-keep-region-active))
|
||
|
||
(defun c-append-backslash (column)
|
||
(end-of-line)
|
||
(if (eq (char-before) ?\\)
|
||
(progn (forward-char -1)
|
||
(delete-horizontal-space)
|
||
(indent-to column))
|
||
(indent-to column)
|
||
(insert "\\")))
|
||
|
||
(defun c-delete-backslash ()
|
||
(end-of-line)
|
||
(or (bolp)
|
||
(progn
|
||
(forward-char -1)
|
||
(if (looking-at "\\\\")
|
||
(delete-region (1+ (point))
|
||
(progn (skip-chars-backward " \t") (point)))))))
|
||
|
||
|
||
(defun c-fill-paragraph (&optional arg)
|
||
"Like \\[fill-paragraph] but handles C and C++ style comments.
|
||
If any of the current line is a comment or within a comment,
|
||
fill the comment or the paragraph of it that point is in,
|
||
preserving the comment indentation or line-starting decorations.
|
||
|
||
Optional prefix ARG means justify paragraph as well."
|
||
(interactive "P")
|
||
(let* (comment-start-place
|
||
(first-line
|
||
;; Check for obvious entry to comment.
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(skip-chars-forward " \t\n")
|
||
(and (looking-at comment-start-skip)
|
||
(setq comment-start-place (point)))))
|
||
(re1 "\\|[ \t]*/\\*[ \t]*$\\|[ \t]*\\*/[ \t]*$\\|[ \t/*]*$"))
|
||
(if (and c-double-slash-is-comments-p
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(looking-at ".*//")))
|
||
(let ((fill-prefix fill-prefix)
|
||
;; Lines containing just a comment start or just an end
|
||
;; should not be filled into paragraphs they are next
|
||
;; to.
|
||
(paragraph-start (concat paragraph-start re1))
|
||
(paragraph-separate (concat paragraph-separate re1)))
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
;; Move up to first line of this comment.
|
||
(while (and (not (bobp))
|
||
(looking-at "[ \t]*//[ \t]*[^ \t\n]"))
|
||
(forward-line -1))
|
||
(if (not (looking-at ".*//[ \t]*[^ \t\n]"))
|
||
(forward-line 1))
|
||
;; Find the comment start in this line.
|
||
(re-search-forward "[ \t]*//[ \t]*")
|
||
;; Set the fill-prefix to be what all lines except the first
|
||
;; should start with. But do not alter a user set fill-prefix.
|
||
(if (null fill-prefix)
|
||
(setq fill-prefix (buffer-substring (match-beginning 0)
|
||
(match-end 0))))
|
||
(save-restriction
|
||
;; Narrow down to just the lines of this comment.
|
||
(narrow-to-region (c-point 'bol)
|
||
(save-excursion
|
||
(forward-line 1)
|
||
(while (looking-at fill-prefix)
|
||
(forward-line 1))
|
||
(point)))
|
||
(fill-paragraph arg)
|
||
t)))
|
||
;; else C style comments
|
||
(if (or first-line
|
||
;; t if we enter a comment between start of function and
|
||
;; this line.
|
||
(eq (c-in-literal) 'c)
|
||
;; t if this line contains a comment starter.
|
||
(setq first-line
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(prog1
|
||
(re-search-forward comment-start-skip
|
||
(save-excursion (end-of-line)
|
||
(point))
|
||
t)
|
||
(setq comment-start-place (point))))))
|
||
;; Inside a comment: fill one comment paragraph.
|
||
(let ((fill-prefix
|
||
;; The prefix for each line of this paragraph
|
||
;; is the appropriate part of the start of this line,
|
||
;; up to the column at which text should be indented.
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(if (looking-at "[ \t]*/\\*.*\\*/")
|
||
(progn (re-search-forward comment-start-skip)
|
||
(make-string (current-column) ?\ ))
|
||
(if first-line (forward-line 1))
|
||
|
||
(let ((line-width (progn (end-of-line) (current-column))))
|
||
(beginning-of-line)
|
||
(prog1
|
||
(buffer-substring
|
||
(point)
|
||
|
||
;; How shall we decide where the end of the
|
||
;; fill-prefix is?
|
||
(progn
|
||
(beginning-of-line)
|
||
(skip-chars-forward " \t*" (c-point 'eol))
|
||
;; kludge alert, watch out for */, in
|
||
;; which case fill-prefix should *not*
|
||
;; be "*"!
|
||
(if (and (eq (char-after) ?/)
|
||
(eq (char-before) ?*))
|
||
(forward-char -1))
|
||
(point)))
|
||
|
||
;; If the comment is only one line followed
|
||
;; by a blank line, calling move-to-column
|
||
;; above may have added some spaces and tabs
|
||
;; to the end of the line; the fill-paragraph
|
||
;; function will then delete it and the
|
||
;; newline following it, so we'll lose a
|
||
;; blank line when we shouldn't. So delete
|
||
;; anything move-to-column added to the end
|
||
;; of the line. We record the line width
|
||
;; instead of the position of the old line
|
||
;; end because move-to-column might break a
|
||
;; tab into spaces, and the new characters
|
||
;; introduced there shouldn't be deleted.
|
||
|
||
;; If you can see a better way to do this,
|
||
;; please make the change. This seems very
|
||
;; messy to me.
|
||
(delete-region (progn (move-to-column line-width)
|
||
(point))
|
||
(progn (end-of-line) (point))))))))
|
||
|
||
;; Lines containing just a comment start or just an end
|
||
;; should not be filled into paragraphs they are next
|
||
;; to.
|
||
(paragraph-start (concat paragraph-start re1))
|
||
(paragraph-separate (concat paragraph-separate re1))
|
||
(chars-to-delete 0)
|
||
)
|
||
(save-restriction
|
||
;; Don't fill the comment together with the code
|
||
;; following it. So temporarily exclude everything
|
||
;; before the comment start, and everything after the
|
||
;; line where the comment ends. If comment-start-place
|
||
;; is non-nil, the comment starter is there. Otherwise,
|
||
;; point is inside the comment.
|
||
(narrow-to-region (save-excursion
|
||
(if comment-start-place
|
||
(goto-char comment-start-place)
|
||
(search-backward "/*"))
|
||
(if (and (not c-hanging-comment-starter-p)
|
||
(looking-at
|
||
(concat c-comment-start-regexp
|
||
"[ \t]*$")))
|
||
(forward-line 1))
|
||
;; Protect text before the comment
|
||
;; start by excluding it. Add
|
||
;; spaces to bring back proper
|
||
;; indentation of that point.
|
||
(let ((column (current-column)))
|
||
(prog1 (point)
|
||
(setq chars-to-delete column)
|
||
(insert-char ?\ column))))
|
||
(save-excursion
|
||
(if comment-start-place
|
||
(goto-char (+ comment-start-place 2)))
|
||
(search-forward "*/" nil 'move)
|
||
(forward-line 1)
|
||
(point)))
|
||
(fill-paragraph arg)
|
||
(save-excursion
|
||
;; Delete the chars we inserted to avoid clobbering
|
||
;; the stuff before the comment start.
|
||
(goto-char (point-min))
|
||
(if (> chars-to-delete 0)
|
||
(delete-region (point) (+ (point) chars-to-delete)))
|
||
;; Find the comment ender (should be on last line of
|
||
;; buffer, given the narrowing) and don't leave it on
|
||
;; its own line, unless that's the style that's desired.
|
||
(goto-char (point-max))
|
||
(forward-line -1)
|
||
(search-forward "*/" nil 'move)
|
||
(beginning-of-line)
|
||
(if (and c-hanging-comment-ender-p
|
||
(looking-at "[ \t]*\\*/"))
|
||
;(delete-indentation)))))
|
||
(let ((fill-column (+ fill-column 9999)))
|
||
(forward-line -1)
|
||
(fill-region-as-paragraph (point) (point-max))))))
|
||
t)))))
|
||
|
||
|
||
(provide 'cc-cmds)
|
||
;;; cc-cmds.el ends here
|