Commit | Line | Data |
---|---|---|
0ec8351b | 1 | ;;; cc-cmds.el --- user level commands for CC Mode |
785eecbb | 2 | |
130c507e | 3 | ;; Copyright (C) 1985,1987,1992-2001 Free Software Foundation, Inc. |
785eecbb | 4 | |
b8ded794 GM |
5 | ;; Authors: 2000- Martin Stjernholm |
6 | ;; 1998-1999 Barry A. Warsaw and Martin Stjernholm | |
0ec8351b | 7 | ;; 1992-1997 Barry A. Warsaw |
785eecbb RS |
8 | ;; 1987 Dave Detlefs and Stewart Clamen |
9 | ;; 1985 Richard M. Stallman | |
0ec8351b | 10 | ;; Maintainer: bug-cc-mode@gnu.org |
785eecbb | 11 | ;; Created: 22-Apr-1997 (split from cc-mode.el) |
a7c7b186 | 12 | ;; Version: See cc-mode.el |
785eecbb RS |
13 | ;; Keywords: c languages oop |
14 | ||
15 | ;; This file is part of GNU Emacs. | |
16 | ||
17 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
18 | ;; it under the terms of the GNU General Public License as published by | |
19 | ;; the Free Software Foundation; either version 2, or (at your option) | |
20 | ;; any later version. | |
21 | ||
22 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
23 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
24 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
25 | ;; GNU General Public License for more details. | |
26 | ||
27 | ;; You should have received a copy of the GNU General Public License | |
130c507e GM |
28 | ;; along with this program; see the file COPYING. If not, write to |
29 | ;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
785eecbb RS |
30 | ;; Boston, MA 02111-1307, USA. |
31 | ||
3afbc435 PJ |
32 | ;;; Commentary: |
33 | ||
34 | ;;; Code: | |
35 | ||
0ec8351b | 36 | (eval-when-compile |
51f606de | 37 | (let ((load-path |
130c507e GM |
38 | (if (and (boundp 'byte-compile-dest-file) |
39 | (stringp byte-compile-dest-file)) | |
40 | (cons (file-name-directory byte-compile-dest-file) load-path) | |
51f606de | 41 | load-path))) |
130c507e GM |
42 | (require 'cc-bytecomp))) |
43 | ||
44 | (cc-require 'cc-defs) | |
45 | (cc-require 'cc-vars) | |
46 | (cc-require 'cc-langs) | |
47 | (cc-require 'cc-engine) | |
48 | ||
49 | ;; Silence the compiler. | |
50 | (cc-bytecomp-defvar delete-key-deletes-forward) ; XEmacs 20+ | |
51 | (cc-bytecomp-defun delete-forward-p) ; XEmacs 21+ | |
52 | (cc-bytecomp-obsolete-fun insert-and-inherit) ; Marked obsolete in XEmacs 19 | |
53 | (cc-bytecomp-defvar filladapt-mode) ; c-fill-paragraph contains a kludge | |
54 | ; which looks at this. | |
0ec8351b | 55 | |
51f606de | 56 | \f |
785eecbb RS |
57 | (defun c-calculate-state (arg prevstate) |
58 | ;; Calculate the new state of PREVSTATE, t or nil, based on arg. If | |
59 | ;; arg is nil or zero, toggle the state. If arg is negative, turn | |
60 | ;; the state off, and if arg is positive, turn the state on | |
61 | (if (or (not arg) | |
62 | (zerop (setq arg (prefix-numeric-value arg)))) | |
63 | (not prevstate) | |
64 | (> arg 0))) | |
65 | ||
66 | ;; Auto-newline and hungry-delete | |
130c507e | 67 | (defun c-toggle-auto-state (&optional arg) |
785eecbb | 68 | "Toggle auto-newline feature. |
130c507e GM |
69 | Optional numeric ARG, if supplied, turns on auto-newline when |
70 | positive, turns it off when negative, and just toggles it when zero or | |
71 | left out. | |
785eecbb RS |
72 | |
73 | When the auto-newline feature is enabled (as evidenced by the `/a' or | |
74 | `/ah' on the modeline after the mode name) newlines are automatically | |
75 | inserted after special characters such as brace, comma, semi-colon, | |
76 | and colon." | |
77 | (interactive "P") | |
78 | (setq c-auto-newline (c-calculate-state arg c-auto-newline)) | |
79 | (c-update-modeline) | |
80 | (c-keep-region-active)) | |
81 | ||
130c507e | 82 | (defun c-toggle-hungry-state (&optional arg) |
785eecbb | 83 | "Toggle hungry-delete-key feature. |
130c507e GM |
84 | Optional numeric ARG, if supplied, turns on hungry-delete when |
85 | positive, turns it off when negative, and just toggles it when zero or | |
86 | left out. | |
785eecbb RS |
87 | |
88 | When the hungry-delete-key feature is enabled (as evidenced by the | |
89 | `/h' or `/ah' on the modeline after the mode name) the delete key | |
90 | gobbles all preceding whitespace in one fell swoop." | |
91 | (interactive "P") | |
92 | (setq c-hungry-delete-key (c-calculate-state arg c-hungry-delete-key)) | |
93 | (c-update-modeline) | |
94 | (c-keep-region-active)) | |
95 | ||
130c507e | 96 | (defun c-toggle-auto-hungry-state (&optional arg) |
785eecbb | 97 | "Toggle auto-newline and hungry-delete-key features. |
130c507e | 98 | Optional numeric ARG, if supplied, turns on auto-newline and |
785eecbb | 99 | hungry-delete when positive, turns them off when negative, and just |
130c507e | 100 | toggles them when zero or left out. |
785eecbb RS |
101 | |
102 | See `c-toggle-auto-state' and `c-toggle-hungry-state' for details." | |
103 | (interactive "P") | |
104 | (setq c-auto-newline (c-calculate-state arg c-auto-newline)) | |
105 | (setq c-hungry-delete-key (c-calculate-state arg c-hungry-delete-key)) | |
106 | (c-update-modeline) | |
107 | (c-keep-region-active)) | |
108 | ||
109 | \f | |
110 | ;; Electric keys | |
111 | ||
785eecbb RS |
112 | (defun c-electric-backspace (arg) |
113 | "Deletes preceding character or whitespace. | |
114 | If `c-hungry-delete-key' is non-nil, as evidenced by the \"/h\" or | |
115 | \"/ah\" string on the mode line, then all preceding whitespace is | |
fdea67e7 EZ |
116 | consumed. If however a prefix argument is supplied, or |
117 | `c-hungry-delete-key' is nil, or point is inside a literal then the | |
118 | function in the variable `c-backspace-function' is called. | |
785eecbb RS |
119 | |
120 | See also \\[c-electric-delete]." | |
28c236de | 121 | (interactive "*P") |
785eecbb RS |
122 | (if (or (not c-hungry-delete-key) |
123 | arg | |
124 | (c-in-literal)) | |
125 | (funcall c-backspace-function (prefix-numeric-value arg)) | |
126 | (let ((here (point))) | |
127 | (skip-chars-backward " \t\n") | |
128 | (if (/= (point) here) | |
129 | (delete-region (point) here) | |
130 | (funcall c-backspace-function 1) | |
131 | )))) | |
132 | ||
fdea67e7 EZ |
133 | (defun c-electric-delete-forward (arg) |
134 | "Deletes following character or whitespace. | |
135 | If `c-hungry-delete-key' is non-nil, as evidenced by the \"/h\" or | |
136 | \"/ah\" string on the mode line, then all following whitespace is | |
137 | consumed. If however a prefix argument is supplied, or | |
138 | `c-hungry-delete-key' is nil, or point is inside a literal then the | |
139 | function in the variable `c-delete-function' is called." | |
140 | (interactive "*P") | |
141 | (if (or (not c-hungry-delete-key) | |
142 | arg | |
143 | (c-in-literal)) | |
144 | (funcall c-delete-function (prefix-numeric-value arg)) | |
145 | (let ((here (point))) | |
146 | (skip-chars-forward " \t\n") | |
147 | (if (/= (point) here) | |
148 | (delete-region (point) here) | |
149 | (funcall c-delete-function 1))))) | |
150 | ||
785eecbb RS |
151 | (defun c-electric-delete (arg) |
152 | "Deletes preceding or following character or whitespace. | |
fdea67e7 EZ |
153 | This function either deletes forward as `c-electric-delete-forward' or |
154 | backward as `c-electric-backspace', depending on the configuration: | |
155 | ||
156 | If the function `delete-forward-p' is defined (XEmacs 21) and returns | |
157 | non-nil, it deletes forward. Else, if the variable | |
158 | `delete-key-deletes-forward' is defined (XEmacs 20) and is set to | |
159 | non-nil, it deletes forward. Otherwise it deletes backward. | |
160 | ||
161 | Note: This is the way in XEmacs 20 and later to choose the correct | |
162 | action for the [delete] key, whichever key that means. In other | |
163 | flavors this function isn't used, instead it's left to the user to | |
164 | bind [delete] to either \\[c-electric-delete-forward] or \\[c-electric-backspace] as appropriate | |
165 | \(the keymap `function-key-map' is useful for that). Emacs 21 handles | |
166 | that automatically, though." | |
28c236de | 167 | (interactive "*P") |
0ec8351b BW |
168 | (if (or (and (fboundp 'delete-forward-p) ;XEmacs 21 |
169 | (delete-forward-p)) | |
170 | (and (boundp 'delete-key-deletes-forward) ;XEmacs 20 | |
171 | delete-key-deletes-forward)) | |
fdea67e7 | 172 | (c-electric-delete-forward arg) |
785eecbb RS |
173 | (c-electric-backspace arg))) |
174 | ||
175 | (defun c-electric-pound (arg) | |
176 | "Electric pound (`#') insertion. | |
177 | Inserts a `#' character specially depending on the variable | |
178 | `c-electric-pound-behavior'. If a numeric ARG is supplied, or if | |
179 | point is inside a literal, nothing special happens." | |
28c236de | 180 | (interactive "*P") |
0ec8351b BW |
181 | (if (or arg |
182 | (not (memq 'alignleft c-electric-pound-behavior)) | |
183 | (save-excursion (skip-chars-backward " \t") (not (bolp))) | |
184 | (c-in-literal)) | |
785eecbb RS |
185 | ;; do nothing special |
186 | (self-insert-command (prefix-numeric-value arg)) | |
187 | ;; place the pound character at the left edge | |
188 | (let ((pos (- (point-max) (point))) | |
189 | (bolp (bolp))) | |
190 | (beginning-of-line) | |
191 | (delete-horizontal-space) | |
192 | (insert-char last-command-char 1) | |
193 | (and (not bolp) | |
194 | (goto-char (- (point-max) pos))) | |
195 | ))) | |
196 | ||
197 | (defun c-electric-brace (arg) | |
198 | "Insert a brace. | |
199 | ||
200 | If the auto-newline feature is turned on, as evidenced by the \"/a\" | |
201 | or \"/ah\" string on the mode line, newlines are inserted before and | |
202 | after braces based on the value of `c-hanging-braces-alist'. | |
203 | ||
204 | Also, the line is re-indented unless a numeric ARG is supplied, there | |
b8ded794 GM |
205 | are non-whitespace characters present on the line after the brace, the |
206 | brace is inserted inside a literal, or `c-syntactic-indentation' is | |
207 | nil. | |
0ec8351b BW |
208 | |
209 | This function does various newline cleanups based on the value of | |
210 | `c-cleanup-list'." | |
28c236de | 211 | (interactive "*P") |
785eecbb RS |
212 | (let* ((c-state-cache (c-parse-state)) |
213 | (safepos (c-safe-position (point) c-state-cache)) | |
214 | (literal (c-in-literal safepos))) | |
215 | ;; if we're in a literal, or we're not at the end of the line, or | |
216 | ;; a numeric arg is provided, or auto-newlining is turned off, | |
217 | ;; then just insert the character. | |
0ec8351b BW |
218 | (if (or literal |
219 | arg | |
785eecbb RS |
220 | (not (looking-at "[ \t]*$"))) |
221 | (self-insert-command (prefix-numeric-value arg)) | |
28c236de RS |
222 | (let* ((syms |
223 | ;; This is the list of brace syntactic symbols that can | |
224 | ;; hang. If any new ones are added to c-offsets-alist, | |
225 | ;; they should be added here as well. | |
226 | '(class-open class-close defun-open defun-close | |
227 | inline-open inline-close | |
228 | brace-list-open brace-list-close | |
0ec8351b | 229 | brace-list-intro brace-entry-open |
28c236de RS |
230 | block-open block-close |
231 | substatement-open statement-case-open | |
232 | extern-lang-open extern-lang-close | |
233 | namespace-open namespace-close | |
0ec8351b | 234 | inexpr-class-open inexpr-class-close |
28c236de | 235 | )) |
785eecbb RS |
236 | ;; we want to inhibit blinking the paren since this will |
237 | ;; be most disruptive. we'll blink it ourselves later on | |
238 | (old-blink-paren blink-paren-function) | |
239 | blink-paren-function | |
240 | (insertion-point (point)) | |
241 | delete-temp-newline | |
811fd07a RS |
242 | (preserve-p (and (not (bobp)) |
243 | (eq ?\ (char-syntax (char-before))))) | |
785eecbb RS |
244 | ;; shut this up too |
245 | (c-echo-syntactic-information-p nil) | |
246 | (syntax (progn | |
247 | ;; only insert a newline if there is | |
248 | ;; non-whitespace behind us | |
249 | (if (save-excursion | |
250 | (skip-chars-backward " \t") | |
251 | (not (bolp))) | |
252 | (progn (newline) | |
253 | (setq delete-temp-newline t))) | |
b8ded794 GM |
254 | (if (eq last-command-char ?{) |
255 | (setq c-state-cache (cons (point) c-state-cache))) | |
785eecbb RS |
256 | (self-insert-command (prefix-numeric-value arg)) |
257 | ;; state cache doesn't change | |
258 | (c-guess-basic-syntax))) | |
259 | (newlines (and | |
260 | c-auto-newline | |
0ec8351b BW |
261 | (or (c-lookup-lists |
262 | syms | |
263 | ;; Substitute inexpr-class and class-open | |
264 | ;; or class-close with inexpr-class-open | |
265 | ;; or inexpr-class-close. | |
266 | (if (assq 'inexpr-class syntax) | |
267 | (cond ((assq 'class-open syntax) | |
268 | '((inexpr-class-open))) | |
269 | ((assq 'class-close syntax) | |
270 | '((inexpr-class-close))) | |
271 | (t syntax)) | |
272 | syntax) | |
273 | c-hanging-braces-alist) | |
785eecbb | 274 | '(ignore before after))))) |
0ec8351b BW |
275 | ;; Do not try to insert newlines around a special (Pike-style) |
276 | ;; brace list. | |
277 | (if (and c-special-brace-lists | |
0ec8351b BW |
278 | (save-excursion |
279 | (c-safe (if (= (char-before) ?{) | |
280 | (forward-char -1) | |
281 | (c-forward-sexp -1)) | |
282 | (c-looking-at-special-brace-list)))) | |
283 | (setq newlines nil)) | |
785eecbb RS |
284 | ;; If syntax is a function symbol, then call it using the |
285 | ;; defined semantics. | |
286 | (if (and (not (consp (cdr newlines))) | |
287 | (functionp (cdr newlines))) | |
288 | (let ((c-syntactic-context syntax)) | |
289 | (setq newlines | |
290 | (funcall (cdr newlines) (car newlines) insertion-point)))) | |
291 | ;; does a newline go before the open brace? | |
292 | (if (memq 'before newlines) | |
293 | ;; we leave the newline we've put in there before, | |
294 | ;; but we need to re-indent the line above | |
130c507e GM |
295 | (let (old-ind |
296 | (old-point-max (point-max)) | |
297 | (pos (- (point-max) (point))) | |
0ec8351b | 298 | (here (point))) |
785eecbb | 299 | (forward-line -1) |
130c507e | 300 | (setq old-ind (c-point 'boi)) |
0ec8351b BW |
301 | (let ((c-state-cache (c-whack-state (point) c-state-cache))) |
302 | ;; we may need to update the cache. this should | |
303 | ;; still be faster than recalculating the state | |
304 | ;; in many cases | |
305 | (save-excursion | |
306 | (save-restriction | |
307 | (narrow-to-region here (point)) | |
308 | (if (and (c-safe (progn (backward-up-list -1) t)) | |
309 | (memq (char-before) '(?\) ?})) | |
310 | (progn (widen) | |
311 | (c-safe (progn (c-forward-sexp -1) | |
312 | t)))) | |
313 | (setq c-state-cache | |
314 | (c-hack-state (point) 'open c-state-cache))))) | |
b8ded794 | 315 | (if c-syntactic-indentation |
130c507e GM |
316 | (indent-according-to-mode))) |
317 | (setq c-state-cache (c-adjust-state (c-point 'bol) old-point-max | |
318 | (- (c-point 'boi) old-ind) | |
0ec8351b | 319 | c-state-cache)) |
785eecbb RS |
320 | (goto-char (- (point-max) pos)) |
321 | ;; if the buffer has changed due to the indentation, we | |
322 | ;; need to recalculate syntax for the current line, but | |
323 | ;; we won't need to update the state cache. | |
324 | (if (/= (point) here) | |
325 | (setq syntax (c-guess-basic-syntax)))) | |
326 | ;; must remove the newline we just stuck in (if we really did it) | |
327 | (and delete-temp-newline | |
328 | (save-excursion | |
329 | ;; if there is whitespace before point, then preserve | |
330 | ;; at least one space. | |
331 | (delete-indentation) | |
332 | (just-one-space) | |
b8ded794 | 333 | (setq c-state-cache (c-whack-state (point) c-state-cache)) |
785eecbb RS |
334 | (if (not preserve-p) |
335 | (delete-char -1)))) | |
336 | ;; since we're hanging the brace, we need to recalculate | |
337 | ;; syntax. Update the state to accurately reflect the | |
338 | ;; beginning of the line. We punt if we cross any open or | |
339 | ;; closed parens because its just too hard to modify the | |
340 | ;; known state. This limitation will be fixed in v5. | |
341 | (save-excursion | |
342 | (let ((bol (c-point 'bol))) | |
343 | (if (zerop (car (parse-partial-sexp bol (1- (point))))) | |
b8ded794 | 344 | (setq syntax (c-guess-basic-syntax)) |
785eecbb RS |
345 | ;; gotta punt. this requires some horrible kludgery |
346 | (beginning-of-line) | |
130c507e GM |
347 | (setq c-state-cache nil |
348 | c-state-cache (c-parse-state) | |
785eecbb RS |
349 | syntax nil)))) |
350 | ) | |
130c507e GM |
351 | ;; Now adjust the line's indentation. Don't update the state |
352 | ;; cache since c-guess-basic-syntax isn't called when | |
353 | ;; c-syntactic-context is set. | |
354 | (let* ((old-ind (c-point 'boi)) | |
355 | (old-point-max (point-max)) | |
356 | (c-syntactic-context syntax)) | |
357 | (indent-according-to-mode) | |
358 | (setq c-state-cache (c-adjust-state (c-point 'bol) old-point-max | |
359 | (- (c-point 'boi) old-ind) | |
0ec8351b | 360 | c-state-cache))) |
785eecbb RS |
361 | ;; Do all appropriate clean ups |
362 | (let ((here (point)) | |
363 | (pos (- (point-max) (point))) | |
51f606de | 364 | mbeg mend tmp) |
785eecbb RS |
365 | ;; clean up empty defun braces |
366 | (if (and c-auto-newline | |
367 | (memq 'empty-defun-braces c-cleanup-list) | |
368 | (eq last-command-char ?\}) | |
369 | (c-intersect-lists '(defun-close class-close inline-close) | |
370 | syntax) | |
371 | (progn | |
372 | (forward-char -1) | |
373 | (skip-chars-backward " \t\n") | |
374 | (eq (char-before) ?\{)) | |
375 | ;; make sure matching open brace isn't in a comment | |
376 | (not (c-in-literal))) | |
377 | (delete-region (point) (1- here))) | |
51f606de GM |
378 | ;; clean up brace-else-brace and brace-elseif-brace |
379 | (when (and c-auto-newline | |
380 | (eq last-command-char ?\{) | |
381 | (not (c-in-literal))) | |
382 | (cond | |
383 | ((and (memq 'brace-else-brace c-cleanup-list) | |
785eecbb RS |
384 | (re-search-backward "}[ \t\n]*else[ \t\n]*{" nil t) |
385 | (progn | |
386 | (setq mbeg (match-beginning 0) | |
387 | mend (match-end 0)) | |
51f606de GM |
388 | (eq (match-end 0) here))) |
389 | (delete-region mbeg mend) | |
390 | (insert "} else {")) | |
391 | ((and (memq 'brace-elseif-brace c-cleanup-list) | |
392 | (progn | |
393 | (goto-char (1- here)) | |
394 | (setq mend (point)) | |
395 | (skip-chars-backward " \t\n") | |
396 | (setq mbeg (point)) | |
397 | (eq (char-before) ?\))) | |
398 | (= (c-backward-token-1 1 t) 0) | |
399 | (eq (char-after) ?\() | |
400 | (progn | |
401 | (setq tmp (point)) | |
402 | (re-search-backward "}[ \t\n]*else[ \t\n]+if[ \t\n]*" | |
403 | nil t)) | |
404 | (eq (match-end 0) tmp)) | |
405 | (delete-region mbeg mend) | |
406 | (goto-char mbeg) | |
407 | (insert " ")))) | |
785eecbb RS |
408 | (goto-char (- (point-max) pos)) |
409 | ) | |
410 | ;; does a newline go after the brace? | |
411 | (if (memq 'after newlines) | |
412 | (progn | |
413 | (newline) | |
414 | ;; update on c-state-cache | |
415 | (let* ((bufpos (- (point) 2)) | |
416 | (which (if (eq (char-after bufpos) ?{) 'open 'close)) | |
417 | (c-state-cache (c-hack-state bufpos which c-state-cache))) | |
130c507e | 418 | (indent-according-to-mode)))) |
785eecbb RS |
419 | ;; blink the paren |
420 | (and (eq last-command-char ?\}) | |
421 | old-blink-paren | |
422 | (save-excursion | |
423 | (c-backward-syntactic-ws safepos) | |
424 | (funcall old-blink-paren))) | |
425 | )))) | |
0ec8351b | 426 | |
785eecbb RS |
427 | (defun c-electric-slash (arg) |
428 | "Insert a slash character. | |
0fc3821e RS |
429 | |
430 | Indent the line as a comment, if: | |
431 | ||
432 | 1. The slash is second of a `//' line oriented comment introducing | |
433 | token and we are on a comment-only-line, or | |
434 | ||
435 | 2. The slash is part of a `*/' token that closes a block oriented | |
436 | comment. | |
437 | ||
b8ded794 GM |
438 | If a numeric ARG is supplied, point is inside a literal, or |
439 | `c-syntactic-indentation' is nil, indentation is inhibited." | |
28c236de | 440 | (interactive "*P") |
0fc3821e | 441 | (let* ((ch (char-before)) |
b8ded794 GM |
442 | (indentp (and c-syntactic-indentation |
443 | (not arg) | |
0fc3821e RS |
444 | (eq last-command-char ?/) |
445 | (or (and (eq ch ?/) | |
446 | (not (c-in-literal))) | |
447 | (and (eq ch ?*) | |
448 | (c-in-literal))) | |
449 | )) | |
450 | ;; shut this up | |
451 | (c-echo-syntactic-information-p nil)) | |
785eecbb RS |
452 | (self-insert-command (prefix-numeric-value arg)) |
453 | (if indentp | |
130c507e | 454 | (indent-according-to-mode)))) |
785eecbb RS |
455 | |
456 | (defun c-electric-star (arg) | |
457 | "Insert a star character. | |
458 | If the star is the second character of a C style comment introducing | |
459 | construct, and we are on a comment-only-line, indent line as comment. | |
b8ded794 GM |
460 | If a numeric ARG is supplied, point is inside a literal, or |
461 | `c-syntactic-indentation' is nil, indentation is inhibited." | |
28c236de | 462 | (interactive "*P") |
785eecbb RS |
463 | (self-insert-command (prefix-numeric-value arg)) |
464 | ;; if we are in a literal, or if arg is given do not re-indent the | |
465 | ;; current line, unless this star introduces a comment-only line. | |
b8ded794 GM |
466 | (if (and c-syntactic-indentation |
467 | (not arg) | |
785eecbb RS |
468 | (memq (c-in-literal) '(c)) |
469 | (eq (char-before) ?*) | |
470 | (save-excursion | |
471 | (forward-char -1) | |
472 | (skip-chars-backward "*") | |
473 | (if (eq (char-before) ?/) | |
474 | (forward-char -1)) | |
475 | (skip-chars-backward " \t") | |
476 | (bolp))) | |
130c507e GM |
477 | (let (c-echo-syntactic-information-p) ; shut this up |
478 | (indent-according-to-mode)) | |
785eecbb RS |
479 | )) |
480 | ||
481 | (defun c-electric-semi&comma (arg) | |
482 | "Insert a comma or semicolon. | |
483 | When the auto-newline feature is turned on, as evidenced by the \"/a\" | |
484 | or \"/ah\" string on the mode line, a newline might be inserted. See | |
485 | the variable `c-hanging-semi&comma-criteria' for how newline insertion | |
486 | is determined. | |
487 | ||
488 | When semicolon is inserted, the line is re-indented unless a numeric | |
489 | arg is supplied, point is inside a literal, or there are | |
b8ded794 GM |
490 | non-whitespace characters on the line following the semicolon, or |
491 | `c-syntactic-indentation' is nil. | |
0ec8351b BW |
492 | |
493 | Based on the value of `c-cleanup-list', this function cleans up commas | |
494 | following brace lists and semicolons following defuns." | |
28c236de | 495 | (interactive "*P") |
785eecbb RS |
496 | (let* ((lim (c-most-enclosing-brace (c-parse-state))) |
497 | (literal (c-in-literal lim)) | |
498 | (here (point)) | |
499 | ;; shut this up | |
500 | (c-echo-syntactic-information-p nil)) | |
501 | (if (or literal | |
502 | arg | |
503 | (not (looking-at "[ \t]*$"))) | |
504 | (self-insert-command (prefix-numeric-value arg)) | |
505 | ;; do some special stuff with the character | |
506 | (self-insert-command (prefix-numeric-value arg)) | |
0ec8351b BW |
507 | ;; do all cleanups and newline insertions if c-auto-newline is |
508 | ;; turned on | |
509 | (if (not c-auto-newline) | |
b8ded794 | 510 | (if c-syntactic-indentation |
130c507e | 511 | (indent-according-to-mode)) |
785eecbb RS |
512 | ;; clean ups |
513 | (let ((pos (- (point-max) (point)))) | |
514 | (if (and (or (and | |
515 | (eq last-command-char ?,) | |
516 | (memq 'list-close-comma c-cleanup-list)) | |
517 | (and | |
518 | (eq last-command-char ?\;) | |
519 | (memq 'defun-close-semi c-cleanup-list))) | |
520 | (progn | |
521 | (forward-char -1) | |
522 | (skip-chars-backward " \t\n") | |
523 | (eq (char-before) ?})) | |
524 | ;; make sure matching open brace isn't in a comment | |
525 | (not (c-in-literal lim))) | |
526 | (delete-region (point) here)) | |
527 | (goto-char (- (point-max) pos))) | |
528 | ;; re-indent line | |
b8ded794 | 529 | (if c-syntactic-indentation |
130c507e | 530 | (indent-according-to-mode)) |
785eecbb RS |
531 | ;; check to see if a newline should be added |
532 | (let ((criteria c-hanging-semi&comma-criteria) | |
533 | answer add-newline-p) | |
534 | (while criteria | |
535 | (setq answer (funcall (car criteria))) | |
536 | ;; only nil value means continue checking | |
537 | (if (not answer) | |
538 | (setq criteria (cdr criteria)) | |
539 | (setq criteria nil) | |
540 | ;; only 'stop specifically says do not add a newline | |
541 | (setq add-newline-p (not (eq answer 'stop))) | |
542 | )) | |
543 | (if add-newline-p | |
544 | (progn (newline) | |
130c507e | 545 | (indent-according-to-mode))) |
785eecbb RS |
546 | ))))) |
547 | ||
548 | (defun c-electric-colon (arg) | |
549 | "Insert a colon. | |
550 | ||
551 | If the auto-newline feature is turned on, as evidenced by the \"/a\" | |
552 | or \"/ah\" string on the mode line, newlines are inserted before and | |
553 | after colons based on the value of `c-hanging-colons-alist'. | |
554 | ||
555 | Also, the line is re-indented unless a numeric ARG is supplied, there | |
b8ded794 GM |
556 | are non-whitespace characters present on the line after the colon, the |
557 | colon is inserted inside a literal, or `c-syntactic-indentation' is | |
558 | nil. | |
785eecbb RS |
559 | |
560 | This function cleans up double colon scope operators based on the | |
561 | value of `c-cleanup-list'." | |
28c236de | 562 | (interactive "*P") |
785eecbb RS |
563 | (let* ((bod (c-point 'bod)) |
564 | (literal (c-in-literal bod)) | |
28c236de | 565 | syntax newlines is-scope-op |
785eecbb RS |
566 | ;; shut this up |
567 | (c-echo-syntactic-information-p nil)) | |
568 | (if (or literal | |
569 | arg | |
570 | (not (looking-at "[ \t]*$"))) | |
571 | (self-insert-command (prefix-numeric-value arg)) | |
572 | ;; insert the colon, then do any specified cleanups | |
573 | (self-insert-command (prefix-numeric-value arg)) | |
574 | (let ((pos (- (point-max) (point))) | |
575 | (here (point))) | |
576 | (if (and c-auto-newline | |
577 | (memq 'scope-operator c-cleanup-list) | |
578 | (eq (char-before) ?:) | |
579 | (progn | |
580 | (forward-char -1) | |
581 | (skip-chars-backward " \t\n") | |
582 | (eq (char-before) ?:)) | |
583 | (not (c-in-literal)) | |
584 | (not (eq (char-after (- (point) 2)) ?:))) | |
28c236de RS |
585 | (progn |
586 | (delete-region (point) (1- here)) | |
587 | (setq is-scope-op t))) | |
785eecbb RS |
588 | (goto-char (- (point-max) pos))) |
589 | ;; lets do some special stuff with the colon character | |
590 | (setq syntax (c-guess-basic-syntax) | |
591 | ;; some language elements can only be determined by | |
592 | ;; checking the following line. Lets first look for ones | |
593 | ;; that can be found when looking on the line with the | |
594 | ;; colon | |
595 | newlines | |
596 | (and c-auto-newline | |
597 | (or (c-lookup-lists '(case-label label access-label) | |
598 | syntax c-hanging-colons-alist) | |
599 | (c-lookup-lists '(member-init-intro inher-intro) | |
0ec8351b BW |
600 | (let ((buffer-undo-list t)) |
601 | (insert "\n") | |
602 | (unwind-protect | |
603 | (c-guess-basic-syntax) | |
604 | (delete-char -1))) | |
785eecbb | 605 | c-hanging-colons-alist)))) |
b8ded794 GM |
606 | ;; indent the current line if it's done syntactically. |
607 | (if c-syntactic-indentation | |
130c507e GM |
608 | (let ((c-syntactic-context syntax)) |
609 | (indent-according-to-mode))) | |
785eecbb RS |
610 | ;; does a newline go before the colon? Watch out for already |
611 | ;; non-hung colons. However, we don't unhang them because that | |
612 | ;; would be a cleanup (and anti-social). | |
613 | (if (and (memq 'before newlines) | |
28c236de | 614 | (not is-scope-op) |
785eecbb RS |
615 | (save-excursion |
616 | (skip-chars-backward ": \t") | |
617 | (not (bolp)))) | |
618 | (let ((pos (- (point-max) (point)))) | |
619 | (forward-char -1) | |
620 | (newline) | |
130c507e | 621 | (indent-according-to-mode) |
785eecbb RS |
622 | (goto-char (- (point-max) pos)))) |
623 | ;; does a newline go after the colon? | |
28c236de RS |
624 | (if (and (memq 'after (cdr-safe newlines)) |
625 | (not is-scope-op)) | |
785eecbb RS |
626 | (progn |
627 | (newline) | |
130c507e | 628 | (indent-according-to-mode))) |
785eecbb RS |
629 | ))) |
630 | ||
631 | (defun c-electric-lt-gt (arg) | |
632 | "Insert a less-than, or greater-than character. | |
0ec8351b BW |
633 | The line will be re-indented if the character inserted is the second |
634 | of a C++ style stream operator and the buffer is in C++ mode. | |
b8ded794 GM |
635 | Exceptions are when a numeric argument is supplied, point is inside a |
636 | literal, or `c-syntactic-indentation' is nil, in which case the line | |
637 | will not be re-indented." | |
28c236de | 638 | (interactive "*P") |
b8ded794 GM |
639 | (let ((indentp (and c-syntactic-indentation |
640 | (not arg) | |
785eecbb RS |
641 | (eq (char-before) last-command-char) |
642 | (not (c-in-literal)))) | |
643 | ;; shut this up | |
644 | (c-echo-syntactic-information-p nil)) | |
645 | (self-insert-command (prefix-numeric-value arg)) | |
646 | (if indentp | |
130c507e | 647 | (indent-according-to-mode)))) |
785eecbb | 648 | |
0ec8351b BW |
649 | (defun c-electric-paren (arg) |
650 | "Insert a parenthesis. | |
651 | ||
130c507e GM |
652 | Some newline cleanups are done if appropriate; see the variable |
653 | `c-cleanup-list'. | |
0ec8351b BW |
654 | |
655 | Also, the line is re-indented unless a numeric ARG is supplied, there | |
51f606de | 656 | are non-whitespace characters present on the line after the |
b8ded794 GM |
657 | parenthesis, the parenthesis is inserted inside a literal, or |
658 | `c-syntactic-indentation' is nil." | |
0ec8351b BW |
659 | (interactive "*P") |
660 | (let (;; shut this up | |
661 | (c-echo-syntactic-information-p nil)) | |
662 | (if (or arg | |
0ec8351b BW |
663 | (c-in-literal (c-point 'bod))) |
664 | (self-insert-command (prefix-numeric-value arg)) | |
665 | ;; do some special stuff with the character | |
666 | (let* (;; We want to inhibit blinking the paren since this will | |
667 | ;; be most disruptive. We'll blink it ourselves | |
668 | ;; afterwards. | |
669 | (old-blink-paren blink-paren-function) | |
670 | blink-paren-function) | |
671 | (self-insert-command (prefix-numeric-value arg)) | |
130c507e GM |
672 | (when (looking-at "[ \t]*$") |
673 | (if c-syntactic-indentation | |
674 | (indent-according-to-mode)) | |
675 | (when c-auto-newline | |
676 | ;; Do all appropriate clean ups | |
677 | (let ((here (point)) | |
678 | (pos (- (point-max) (point))) | |
679 | mbeg mend) | |
680 | ;; clean up brace-elseif-brace | |
681 | (if (and (memq 'brace-elseif-brace c-cleanup-list) | |
682 | (eq last-command-char ?\() | |
683 | (re-search-backward "}[ \t\n]*else[ \t\n]+if[ \t\n]*(" | |
684 | nil t) | |
685 | (save-excursion | |
686 | (setq mbeg (match-beginning 0) | |
687 | mend (match-end 0)) | |
688 | (= mend here)) | |
689 | (not (c-in-literal))) | |
690 | (progn | |
691 | (delete-region mbeg mend) | |
692 | (insert "} else if ("))) | |
693 | ;; clean up brace-catch-brace | |
694 | (if (and (memq 'brace-catch-brace c-cleanup-list) | |
695 | (eq last-command-char ?\() | |
696 | (re-search-backward "}[ \t\n]*catch[ \t\n]*(" nil t) | |
697 | (save-excursion | |
698 | (setq mbeg (match-beginning 0) | |
699 | mend (match-end 0)) | |
700 | (= mend here)) | |
701 | (not (c-in-literal))) | |
702 | (progn | |
703 | (delete-region mbeg mend) | |
704 | (insert "} catch ("))) | |
705 | (goto-char (- (point-max) pos)) | |
706 | ))) | |
707 | (let (beg (end (1- (point)))) | |
708 | (cond ((and (memq 'space-before-funcall c-cleanup-list) | |
709 | (eq last-command-char ?\() | |
710 | (save-excursion | |
711 | (backward-char) | |
712 | (skip-chars-backward " \t") | |
713 | (setq beg (point)) | |
714 | (c-on-identifier))) | |
715 | (save-excursion | |
716 | (delete-region beg end) | |
717 | (goto-char beg) | |
718 | (insert " "))) | |
719 | ((and (memq 'compact-empty-funcall c-cleanup-list) | |
720 | (eq last-command-char ?\)) | |
721 | (save-excursion | |
722 | (c-safe (backward-char 2)) | |
723 | (when (looking-at "()") | |
724 | (setq end (point)) | |
725 | (skip-chars-backward " \t") | |
726 | (setq beg (point)) | |
727 | (c-on-identifier)))) | |
728 | (delete-region beg end)))) | |
51f606de GM |
729 | (if old-blink-paren |
730 | (funcall old-blink-paren)))))) | |
0ec8351b | 731 | |
130c507e GM |
732 | (defun c-electric-continued-statement () |
733 | "Reindent the current line if appropriate. | |
734 | ||
735 | This function is used to reindent the line after a keyword which | |
736 | continues an earlier statement is typed, e.g. an \"else\" or the | |
737 | \"while\" in a do-while block. | |
738 | ||
739 | The line is reindented if there is nothing but whitespace before the | |
740 | keyword on the line, the keyword is not inserted inside a literal, and | |
741 | `c-syntactic-indentation' is non-nil." | |
742 | (let (;; shut this up | |
743 | (c-echo-syntactic-information-p nil)) | |
744 | (when (and c-syntactic-indentation | |
745 | (not (eq last-command-char ?_)) | |
746 | (= (save-excursion | |
747 | (skip-syntax-backward "w") | |
748 | (point)) | |
749 | (c-point 'boi)) | |
750 | (not (c-in-literal (c-point 'bod)))) | |
751 | (indent-according-to-mode)))) | |
785eecbb RS |
752 | |
753 | \f | |
754 | ;; better movement routines for ThisStyleOfVariablesCommonInCPlusPlus | |
755 | ;; originally contributed by Terry_Glanfield.Southern@rxuk.xerox.com | |
756 | (defun c-forward-into-nomenclature (&optional arg) | |
757 | "Move forward to end of a nomenclature section or word. | |
758 | With arg, to it arg times." | |
759 | (interactive "p") | |
760 | (let ((case-fold-search nil)) | |
761 | (if (> arg 0) | |
762 | (re-search-forward "\\W*\\([A-Z]*[a-z0-9]*\\)" (point-max) t arg) | |
763 | (while (and (< arg 0) | |
764 | (re-search-backward | |
765 | "\\(\\(\\W\\|[a-z0-9]\\)[A-Z]+\\|\\W\\w+\\)" | |
766 | (point-min) 0)) | |
767 | (forward-char 1) | |
768 | (setq arg (1+ arg))))) | |
769 | (c-keep-region-active)) | |
770 | ||
771 | (defun c-backward-into-nomenclature (&optional arg) | |
772 | "Move backward to beginning of a nomenclature section or word. | |
773 | With optional ARG, move that many times. If ARG is negative, move | |
774 | forward." | |
775 | (interactive "p") | |
776 | (c-forward-into-nomenclature (- arg)) | |
777 | (c-keep-region-active)) | |
778 | ||
779 | (defun c-scope-operator () | |
780 | "Insert a double colon scope operator at point. | |
781 | No indentation or other \"electric\" behavior is performed." | |
28c236de | 782 | (interactive "*") |
785eecbb RS |
783 | (insert "::")) |
784 | ||
28c236de RS |
785 | (defun c-beginning-of-defun (&optional arg) |
786 | "Move backward to the beginning of a defun. | |
787 | With argument, do it that many times. Negative arg -N | |
788 | means move forward to Nth following beginning of defun. | |
789 | Returns t unless search stops due to beginning or end of buffer. | |
790 | ||
791 | Unlike the built-in `beginning-of-defun' this tries to be smarter | |
792 | about finding the char with open-parenthesis syntax that starts the | |
793 | defun." | |
794 | (interactive "p") | |
51f606de | 795 | (unless arg (setq arg 1)) |
28c236de RS |
796 | (if (< arg 0) |
797 | (c-end-of-defun (- arg)) | |
798 | (while (> arg 0) | |
799 | (let ((state (nreverse (c-parse-state))) | |
800 | prevbod bod) | |
801 | (while (and state (not bod)) | |
802 | (setq bod (car state) | |
803 | state (cdr state)) | |
804 | (if (consp bod) | |
805 | (setq prevbod (car bod) | |
806 | bod nil))) | |
807 | (cond | |
808 | (bod (goto-char bod)) | |
809 | (prevbod (goto-char prevbod)) | |
51f606de GM |
810 | (t (goto-char (point-min)) |
811 | (setq arg 0))) | |
812 | (setq arg (1- arg)))) | |
813 | (c-keep-region-active) | |
814 | (= arg 0))) | |
28c236de RS |
815 | |
816 | (defun c-end-of-defun (&optional arg) | |
817 | "Move forward to next end of defun. With argument, do it that many times. | |
818 | Negative argument -N means move back to Nth preceding end of defun. | |
51f606de | 819 | Returns t unless search stops due to beginning or end of buffer. |
28c236de RS |
820 | |
821 | An end of a defun occurs right after the close-parenthesis that matches | |
822 | the open-parenthesis that starts a defun; see `beginning-of-defun'." | |
823 | (interactive "p") | |
0ec8351b BW |
824 | (if (not arg) |
825 | (setq arg 1)) | |
28c236de RS |
826 | (if (< arg 0) |
827 | (c-beginning-of-defun (- arg)) | |
828 | (while (> arg 0) | |
51f606de GM |
829 | (let ((pos (point)) |
830 | eol) | |
831 | (while (and (c-safe (down-list 1) t) | |
832 | (not (eq (char-before) ?{))) | |
833 | ;; skip down into the next defun-block | |
834 | (forward-char -1) | |
835 | (c-forward-sexp)) | |
836 | (c-beginning-of-defun 1) | |
837 | (setq eol (c-point 'eol)) | |
838 | (c-forward-sexp) | |
839 | (if (< eol (point)) | |
840 | ;; Don't move to next line for one line defuns. | |
841 | (forward-line 1)) | |
842 | (when (<= (point) pos) | |
843 | (goto-char (point-max)) | |
844 | (setq arg 0)) | |
845 | (setq arg (1- arg)))) | |
846 | (c-keep-region-active) | |
847 | (= arg 0))) | |
28c236de | 848 | |
785eecbb RS |
849 | \f |
850 | (defun c-beginning-of-statement (&optional count lim sentence-flag) | |
851 | "Go to the beginning of the innermost C statement. | |
852 | With prefix arg, go back N - 1 statements. If already at the | |
28c236de RS |
853 | beginning of a statement then go to the beginning of the closest |
854 | preceding one, moving into nested blocks if necessary (use | |
130c507e GM |
855 | \\[backward-sexp] to skip over a block). If within or next to a |
856 | comment or multiline string, move by sentences instead of statements. | |
785eecbb RS |
857 | |
858 | When called from a program, this function takes 3 optional args: the | |
859 | repetition count, a buffer position limit which is the farthest back | |
130c507e GM |
860 | to search for the syntactic context, and a flag saying whether to do |
861 | sentence motion in or near comments and multiline strings." | |
785eecbb RS |
862 | (interactive (list (prefix-numeric-value current-prefix-arg) |
863 | nil t)) | |
28c236de RS |
864 | (let* ((count (or count 1)) |
865 | here | |
866 | (range (c-collect-line-comments (c-literal-limits lim)))) | |
867 | (while (and (/= count 0) | |
868 | (or (not lim) (> (point) lim))) | |
869 | (setq here (point)) | |
870 | (if (and (not range) sentence-flag) | |
871 | (save-excursion | |
872 | ;; Find the comment next to point if we're not in one. | |
873 | (if (> count 0) | |
130c507e GM |
874 | (if (c-forward-comment -1) |
875 | (setq range (cons (point) | |
876 | (progn (c-forward-comment 1) (point)))) | |
877 | (skip-chars-backward " \t\n\r\f") | |
878 | (setq range (point)) | |
879 | (setq range | |
880 | (if (eq (char-before) ?\") | |
881 | (c-safe (c-backward-sexp 1) | |
882 | (cons (point) range))))) | |
883 | ;; skip-syntax-* doesn't count \n as whitespace.. | |
884 | (skip-chars-forward " \t\n\r\f") | |
885 | (if (eq (char-after) ?\") | |
886 | (setq range (cons (point) | |
887 | (progn | |
888 | (c-forward-sexp 1) | |
889 | (point)))) | |
890 | (setq range (point)) | |
891 | (setq range (if (c-forward-comment 1) | |
892 | (cons range (point)) | |
893 | nil)))) | |
28c236de RS |
894 | (setq range (c-collect-line-comments range)))) |
895 | (if (and (< count 0) (= here (point-max))) | |
896 | ;; Special case because eob might be in a literal. | |
897 | (setq range nil)) | |
898 | (if range | |
899 | (if (and sentence-flag | |
130c507e GM |
900 | (or (/= (char-syntax (char-after (car range))) ?\") |
901 | ;; Only visit a string if it spans more than one line. | |
902 | (save-excursion | |
903 | (goto-char (car range)) | |
904 | (skip-chars-forward "^\n" (cdr range)) | |
905 | (< (point) (cdr range))))) | |
51f606de | 906 | (let* ((lit-type (c-literal-type range)) |
130c507e GM |
907 | (line-prefix (concat "[ \t]*\\(" |
908 | c-current-comment-prefix | |
909 | "\\)[ \t]*")) | |
910 | (beg (if (eq lit-type 'string) | |
911 | (1+ (car range)) | |
912 | (save-excursion | |
913 | (goto-char (car range)) | |
914 | (max (progn | |
915 | (looking-at comment-start-skip) | |
916 | (match-end 0)) | |
917 | (progn | |
918 | (looking-at line-prefix) | |
919 | (match-end 0)))))) | |
920 | (end (- (cdr range) (if (eq lit-type 'c) 2 1))) | |
921 | (beg-of-para (if (eq lit-type 'string) | |
922 | (lambda ()) | |
923 | (lambda () | |
924 | (beginning-of-line) | |
925 | (if (looking-at line-prefix) | |
926 | (goto-char (match-end 0))))))) | |
28c236de | 927 | (save-restriction |
130c507e GM |
928 | ;; Move by sentence, but not past the limit of the |
929 | ;; literal, narrowed to the appropriate | |
930 | ;; paragraph(s). | |
931 | (narrow-to-region (save-excursion | |
932 | (let ((pos (min here end))) | |
933 | (goto-char pos) | |
934 | (forward-paragraph -1) | |
935 | (if (looking-at paragraph-separate) | |
936 | (forward-line)) | |
937 | (when (> (point) beg) | |
938 | (funcall beg-of-para) | |
939 | (when (>= (point) pos) | |
940 | (forward-paragraph -2) | |
941 | (funcall beg-of-para))) | |
942 | (max (point) beg))) | |
943 | end) | |
51f606de GM |
944 | (c-safe (forward-sentence (if (< count 0) 1 -1))) |
945 | (if (and (memq lit-type '(c c++)) | |
946 | ;; Check if we stopped due to a comment | |
947 | ;; prefix and not a sentence end. | |
130c507e GM |
948 | (/= (point) (point-min)) |
949 | (/= (point) (point-max)) | |
51f606de GM |
950 | (save-excursion |
951 | (beginning-of-line) | |
130c507e | 952 | (looking-at line-prefix)) |
51f606de GM |
953 | (>= (point) (match-beginning 0)) |
954 | (/= (match-beginning 1) (match-end 1)) | |
955 | (or (< (point) (match-end 0)) | |
956 | (and | |
957 | (= (point) (match-end 0)) | |
958 | ;; The comment prefix may contain | |
959 | ;; characters that is regarded as end | |
960 | ;; of sentence. | |
961 | (or (eolp) | |
962 | (and | |
963 | (save-excursion | |
964 | (forward-paragraph -1) | |
965 | (< (point) (match-beginning 0))) | |
966 | (save-excursion | |
967 | (beginning-of-line) | |
968 | (or (not (re-search-backward | |
969 | sentence-end | |
970 | (c-point 'bopl) | |
971 | t)) | |
972 | (< (match-end 0) | |
973 | (c-point 'eol))))))))) | |
974 | (setq count (+ count (if (< count 0) -1 1))) | |
975 | (if (< count 0) | |
976 | (progn | |
977 | ;; In block comments, if there's only | |
978 | ;; horizontal ws between the text and the | |
979 | ;; comment ender, stop before it. Stop after | |
980 | ;; the ender if there's either nothing or | |
981 | ;; newlines between. | |
130c507e GM |
982 | (when (and (eq lit-type 'c) |
983 | (eq (point) (point-max))) | |
51f606de | 984 | (widen) |
130c507e GM |
985 | (when (or (= (skip-chars-backward " \t") 0) |
986 | (eq (point) (point-max)) | |
987 | (bolp)) | |
51f606de | 988 | (goto-char (cdr range))))) |
130c507e GM |
989 | (when (and (eq (point) (point-min)) |
990 | (looking-at "[ \t]*$")) | |
51f606de GM |
991 | ;; Stop before instead of after the comment |
992 | ;; starter if nothing follows it. | |
993 | (widen) | |
130c507e GM |
994 | (goto-char (car range)) |
995 | (if (and (eq lit-type 'string) (/= (point) here)) | |
996 | (setq count (1+ count) | |
997 | range nil)))))) | |
28c236de RS |
998 | ;; See if we should escape the literal. |
999 | (if (> count 0) | |
1000 | (if (< (point) here) | |
1001 | (setq count (1- count)) | |
1002 | (goto-char (car range)) | |
1003 | (setq range nil)) | |
1004 | (if (> (point) here) | |
1005 | (setq count (1+ count)) | |
1006 | (goto-char (cdr range)) | |
1007 | (setq range nil)))) | |
1008 | (goto-char (if (> count 0) (car range) (cdr range))) | |
1009 | (setq range nil)) | |
1010 | ;; Below we do approximately the same as | |
51f606de | 1011 | ;; c-beginning-of-statement-1 and c-end-of-statement-1, and |
28c236de RS |
1012 | ;; perhaps they should be changed, but that'd likely break a |
1013 | ;; lot in cc-engine. | |
1014 | (goto-char here) | |
28c236de | 1015 | (if (> count 0) |
51f606de GM |
1016 | (condition-case nil |
1017 | ;; Stop before `{' and after `;', `{', `}' and `};' | |
1018 | ;; when not followed by `}' or `)', but on the other | |
1019 | ;; side of the syntactic ws. Move by sexps and move | |
130c507e | 1020 | ;; into parens. Also stop before `#' when it's at boi |
51f606de | 1021 | ;; on a line. |
130c507e | 1022 | (let ((literal-pos (not sentence-flag)) |
51f606de GM |
1023 | (large-enough (- (point-max))) |
1024 | last last-below-line) | |
28c236de | 1025 | (catch 'done |
51f606de GM |
1026 | (while t |
1027 | (setq last (point)) | |
130c507e GM |
1028 | (when (and (or (eq (char-after) ?\{) |
1029 | (and (eq (char-after) ?#) | |
1030 | (eq (point) (c-point 'boi))) | |
1031 | ) | |
1032 | (/= here last)) | |
51f606de GM |
1033 | (unless (and c-special-brace-lists |
1034 | (eq (char-after) ?{) | |
1035 | (c-looking-at-special-brace-list)) | |
1036 | (if (and (eq (char-after) ?#) | |
1037 | (numberp last-below-line) | |
1038 | (not (eq last-below-line here))) | |
1039 | (goto-char last-below-line)) | |
1040 | (throw 'done t))) | |
130c507e | 1041 | (if literal-pos |
51f606de GM |
1042 | (c-forward-comment large-enough) |
1043 | (when (c-forward-comment -1) | |
1044 | ;; Record position of first comment. | |
1045 | (save-excursion | |
1046 | (c-forward-comment 1) | |
130c507e | 1047 | (setq literal-pos (point))) |
51f606de GM |
1048 | (c-forward-comment large-enough))) |
1049 | (unless last-below-line | |
1050 | (if (save-excursion | |
1051 | (re-search-forward "\\(^\\|[^\\]\\)$" last t)) | |
1052 | (setq last-below-line last))) | |
1053 | (cond ((bobp) ; Must handle bob specially. | |
1054 | (if (= here last) | |
1055 | (throw 'done t) | |
1056 | (goto-char last) | |
1057 | (throw 'done t))) | |
1058 | ((progn (backward-char) | |
1059 | (looking-at "[;{}]")) | |
1060 | (if (and c-special-brace-lists | |
1061 | (eq (char-after) ?{) | |
1062 | (c-looking-at-special-brace-list)) | |
1063 | (skip-syntax-backward "w_") ; Speedup only. | |
0ec8351b | 1064 | (if (or (= here last) |
51f606de GM |
1065 | (memq (char-after last) '(?\) ?}))) |
1066 | (if (and (eq (char-before) ?}) | |
1067 | (eq (char-after) ?\;)) | |
1068 | (backward-char)) | |
28c236de | 1069 | (goto-char last) |
51f606de GM |
1070 | (throw 'done t)))) |
1071 | ((= (char-syntax (char-after)) ?\") | |
130c507e GM |
1072 | (let ((end (point))) |
1073 | (forward-char) | |
1074 | (c-backward-sexp) | |
1075 | (save-excursion | |
1076 | (skip-chars-forward "^\n" end) | |
1077 | (when (< (point) end) | |
1078 | ;; Break at multiline string. | |
1079 | (setq literal-pos (1+ end)) | |
1080 | (throw 'done t))))) | |
51f606de GM |
1081 | (t (skip-syntax-backward "w_")) ; Speedup only. |
1082 | ))) | |
130c507e GM |
1083 | (if (and (numberp literal-pos) |
1084 | (< (point) literal-pos)) | |
1085 | ;; We jumped over a comment or string that | |
1086 | ;; should be investigated. | |
1087 | (goto-char literal-pos) | |
51f606de GM |
1088 | (setq count (1- count)))) |
1089 | (error | |
1090 | (goto-char (point-min)) | |
1091 | (setq count 0))) | |
1092 | (condition-case nil | |
130c507e | 1093 | ;; Stop before `{', `}', and `#' when it's at boi on a |
51f606de GM |
1094 | ;; line, but on the other side of the syntactic ws, and |
1095 | ;; after `;', `}' and `};'. Only stop before `{' if at | |
1096 | ;; top level or inside braces, though. Move by sexps | |
1097 | ;; and move into parens. Also stop at eol of lines | |
130c507e GM |
1098 | ;; with `#' at the boi. |
1099 | (let ((literal-pos (not sentence-flag)) | |
51f606de GM |
1100 | (large-enough (point-max)) |
1101 | last) | |
1102 | (catch 'done | |
1103 | (while t | |
1104 | (setq last (point)) | |
130c507e | 1105 | (if literal-pos |
51f606de GM |
1106 | (c-forward-comment large-enough) |
1107 | (if (progn | |
1108 | (skip-chars-forward " \t\n\r\f") | |
1109 | ;; Record position of first comment. | |
130c507e | 1110 | (setq literal-pos (point)) |
51f606de GM |
1111 | (c-forward-comment 1)) |
1112 | (c-forward-comment large-enough) | |
130c507e | 1113 | (setq literal-pos nil))) |
51f606de GM |
1114 | (cond ((and (eq (char-after) ?{) |
1115 | (not (and c-special-brace-lists | |
1116 | (c-looking-at-special-brace-list))) | |
1117 | (/= here last) | |
1118 | (save-excursion | |
1119 | (or (not (c-safe (up-list -1) t)) | |
1120 | (= (char-after) ?{)))) | |
1121 | (goto-char last) | |
1122 | (throw 'done t)) | |
1123 | ((and c-special-brace-lists | |
1124 | (eq (char-after) ?}) | |
1125 | (save-excursion | |
1126 | (and (c-safe (up-list -1) t) | |
1127 | (c-looking-at-special-brace-list)))) | |
1128 | (forward-char 1) | |
1129 | (skip-syntax-forward "w_")) ; Speedup only. | |
1130 | ((and (eq (char-after) ?}) | |
1131 | (/= here last)) | |
1132 | (goto-char last) | |
1133 | (throw 'done t)) | |
130c507e GM |
1134 | ((and (eq (char-after) ?#) |
1135 | (= (point) (c-point 'boi))) | |
51f606de GM |
1136 | (if (= here last) |
1137 | (or (re-search-forward "\\(^\\|[^\\]\\)$" nil t) | |
1138 | (goto-char (point-max))) | |
1139 | (goto-char last)) | |
1140 | (throw 'done t)) | |
1141 | ((looking-at ";\\|};?") | |
1142 | (goto-char (match-end 0)) | |
1143 | (throw 'done t)) | |
1144 | ((= (char-syntax (char-after)) ?\") | |
130c507e GM |
1145 | (let ((beg (point))) |
1146 | (c-forward-sexp) | |
1147 | (save-excursion | |
1148 | (skip-chars-backward "^\n" beg) | |
1149 | (when (> (point) beg) | |
1150 | ;; Break at multiline string. | |
1151 | (setq literal-pos beg) | |
1152 | (throw 'done t))))) | |
51f606de GM |
1153 | (t |
1154 | (forward-char 1) | |
1155 | (skip-syntax-forward "w_")) ; Speedup only. | |
1156 | ))) | |
130c507e GM |
1157 | (if (and (numberp literal-pos) |
1158 | (> (point) literal-pos)) | |
51f606de | 1159 | ;; We jumped over a comment that should be investigated. |
130c507e | 1160 | (goto-char literal-pos) |
51f606de GM |
1161 | (setq count (1+ count)))) |
1162 | (error | |
1163 | (goto-char (point-max)) | |
1164 | (setq count 0))) | |
1165 | )) | |
28c236de | 1166 | ;; If we haven't moved we're near a buffer limit. |
51f606de | 1167 | (when (and (not (zerop count)) (= (point) here)) |
28c236de | 1168 | (goto-char (if (> count 0) (point-min) (point-max))) |
130c507e | 1169 | (setq count 0)))) |
785eecbb RS |
1170 | (c-keep-region-active)) |
1171 | ||
1172 | (defun c-end-of-statement (&optional count lim sentence-flag) | |
1173 | "Go to the end of the innermost C statement. | |
28c236de RS |
1174 | With prefix arg, go forward N - 1 statements. Move forward to the end |
1175 | of the next statement if already at end, and move into nested blocks | |
130c507e GM |
1176 | \(use \\[forward-sexp] to skip over a block). If within or next to a |
1177 | comment or multiline string, move by sentences instead of statements. | |
785eecbb RS |
1178 | |
1179 | When called from a program, this function takes 3 optional args: the | |
1180 | repetition count, a buffer position limit which is the farthest back | |
130c507e GM |
1181 | to search for the syntactic context, and a flag saying whether to do |
1182 | sentence motion in or near comments and multiline strings." | |
785eecbb RS |
1183 | (interactive (list (prefix-numeric-value current-prefix-arg) |
1184 | nil t)) | |
1185 | (c-beginning-of-statement (- (or count 1)) lim sentence-flag) | |
1186 | (c-keep-region-active)) | |
1187 | ||
1188 | \f | |
1189 | ;; set up electric character functions to work with pending-del, | |
1190 | ;; (a.k.a. delsel) mode. All symbols get the t value except | |
c93a62d8 | 1191 | ;; the functions which delete, which gets 'supersede. |
785eecbb RS |
1192 | (mapcar |
1193 | (function | |
1194 | (lambda (sym) | |
1195 | (put sym 'delete-selection t) ; for delsel (Emacs) | |
1196 | (put sym 'pending-delete t))) ; for pending-del (XEmacs) | |
1197 | '(c-electric-pound | |
1198 | c-electric-brace | |
1199 | c-electric-slash | |
1200 | c-electric-star | |
1201 | c-electric-semi&comma | |
1202 | c-electric-lt-gt | |
0ec8351b BW |
1203 | c-electric-colon |
1204 | c-electric-paren)) | |
c93a62d8 RS |
1205 | (put 'c-electric-delete 'delete-selection 'supersede) ; delsel |
1206 | (put 'c-electric-delete 'pending-delete 'supersede) ; pending-del | |
1207 | (put 'c-electric-backspace 'delete-selection 'supersede) ; delsel | |
1208 | (put 'c-electric-backspace 'pending-delete 'supersede) ; pending-del | |
7443aaa6 SM |
1209 | (put 'c-electric-delete-forward 'delete-selection 'supersede) ; delsel |
1210 | (put 'c-electric-delete-forward 'pending-delete 'supersede) ; pending-del | |
785eecbb RS |
1211 | |
1212 | \f | |
1213 | ;; This is used by indent-for-comment to decide how much to indent a | |
1214 | ;; comment in C code based on its context. | |
1215 | (defun c-comment-indent () | |
1216 | (if (looking-at (concat "^\\(" c-comment-start-regexp "\\)")) | |
1217 | 0 ;Existing comment at bol stays there. | |
1218 | (let ((opoint (point)) | |
1219 | placeholder) | |
1220 | (save-excursion | |
1221 | (beginning-of-line) | |
1222 | (cond | |
1223 | ;; CASE 1: A comment following a solitary close-brace should | |
1224 | ;; have only one space. | |
1225 | ((looking-at (concat "[ \t]*}[ \t]*\\($\\|" | |
1226 | c-comment-start-regexp | |
1227 | "\\)")) | |
1228 | (search-forward "}") | |
1229 | (1+ (current-column))) | |
1230 | ;; CASE 2: 2 spaces after #endif | |
130c507e GM |
1231 | ((or (looking-at "[ \t]*#[ \t]*endif[ \t]*") |
1232 | (looking-at "[ \t]*#[ \t]*else[ \t]*")) | |
785eecbb | 1233 | 7) |
0ec8351b BW |
1234 | ;; CASE 3: when c-indent-comments-syntactically-p is t, |
1235 | ;; calculate the offset according to c-offsets-alist. | |
1236 | ;; E.g. identical to hitting TAB. | |
785eecbb RS |
1237 | ((and c-indent-comments-syntactically-p |
1238 | (save-excursion | |
1239 | (skip-chars-forward " \t") | |
0ec8351b | 1240 | (or (looking-at c-comment-start-regexp) |
785eecbb RS |
1241 | (eolp)))) |
1242 | (let ((syntax (c-guess-basic-syntax))) | |
1243 | ;; BOGOSITY ALERT: if we're looking at the eol, its | |
1244 | ;; because indent-for-comment hasn't put the comment-start | |
1245 | ;; in the buffer yet. this will screw up the syntactic | |
1246 | ;; analysis so we kludge in the necessary info. Another | |
1247 | ;; kludge is that if we're at the bol, then we really want | |
1248 | ;; to ignore any anchoring as specified by | |
1249 | ;; c-comment-only-line-offset since it doesn't apply here. | |
1250 | (if (save-excursion | |
130c507e | 1251 | (back-to-indentation) |
785eecbb RS |
1252 | (eolp)) |
1253 | (c-add-syntax 'comment-intro)) | |
1254 | (let ((c-comment-only-line-offset | |
1255 | (if (consp c-comment-only-line-offset) | |
1256 | c-comment-only-line-offset | |
1257 | (cons c-comment-only-line-offset | |
1258 | c-comment-only-line-offset)))) | |
130c507e | 1259 | (c-get-syntactic-indentation syntax)))) |
51f606de GM |
1260 | ;; CASE 4: If previous line is a comment-only line, use its |
1261 | ;; indentation if it's greater than comment-column. Leave at | |
1262 | ;; least one space between the comment and the last nonblank | |
1263 | ;; character in any case. | |
785eecbb RS |
1264 | ((save-excursion |
1265 | (beginning-of-line) | |
1266 | (and (not (bobp)) | |
1267 | (forward-line -1)) | |
1268 | (skip-chars-forward " \t") | |
1269 | (prog1 | |
1270 | (looking-at c-comment-start-regexp) | |
51f606de GM |
1271 | (setq placeholder (current-column)))) |
1272 | (goto-char opoint) | |
1273 | (skip-chars-backward " \t") | |
1274 | (max (if (bolp) 0 (1+ (current-column))) | |
1275 | placeholder | |
1276 | comment-column)) | |
785eecbb RS |
1277 | ;; CASE 5: If comment-column is 0, and nothing but space |
1278 | ;; before the comment, align it at 0 rather than 1. | |
1279 | ((progn | |
1280 | (goto-char opoint) | |
1281 | (skip-chars-backward " \t") | |
1282 | (and (= comment-column 0) (bolp))) | |
1283 | 0) | |
1284 | ;; CASE 6: indent at comment column except leave at least one | |
1285 | ;; space. | |
1286 | (t (max (1+ (current-column)) | |
1287 | comment-column)) | |
1288 | ))))) | |
1289 | ||
fd3b1ef6 | 1290 | \f |
785eecbb RS |
1291 | ;; used by outline-minor-mode |
1292 | (defun c-outline-level () | |
de28797f SM |
1293 | ;; This so that `current-column' DTRT in otherwise-hidden text. |
1294 | (let (buffer-invisibility-spec) | |
1295 | (save-excursion | |
1296 | (skip-chars-forward "\t ") | |
1297 | (current-column)))) | |
785eecbb RS |
1298 | |
1299 | \f | |
1300 | (defun c-up-conditional (count) | |
1301 | "Move back to the containing preprocessor conditional, leaving mark behind. | |
1302 | A prefix argument acts as a repeat count. With a negative argument, | |
1303 | move forward to the end of the containing preprocessor conditional. | |
51f606de GM |
1304 | |
1305 | `#elif' is treated like `#else' followed by `#if', so the function | |
1306 | stops at them when going backward, but not when going forward." | |
1307 | (interactive "p") | |
1308 | (c-forward-conditional (- count) -1) | |
1309 | (c-keep-region-active)) | |
1310 | ||
1311 | (defun c-up-conditional-with-else (count) | |
1312 | "Move back to the containing preprocessor conditional, including `#else'. | |
1313 | Just like `c-up-conditional', except it also stops at `#else' | |
1314 | directives." | |
1315 | (interactive "p") | |
1316 | (c-forward-conditional (- count) -1 t) | |
1317 | (c-keep-region-active)) | |
1318 | ||
1319 | (defun c-down-conditional (count) | |
1320 | "Move forward into the next preprocessor conditional, leaving mark behind. | |
1321 | A prefix argument acts as a repeat count. With a negative argument, | |
1322 | move backward into the previous preprocessor conditional. | |
1323 | ||
1324 | `#elif' is treated like `#else' followed by `#if', so the function | |
1325 | stops at them when going forward, but not when going backward." | |
785eecbb | 1326 | (interactive "p") |
51f606de | 1327 | (c-forward-conditional count 1) |
785eecbb RS |
1328 | (c-keep-region-active)) |
1329 | ||
51f606de GM |
1330 | (defun c-down-conditional-with-else (count) |
1331 | "Move forward into the next preprocessor conditional, including `#else'. | |
1332 | Just like `c-down-conditional', except it also stops at `#else' | |
1333 | directives." | |
1334 | (interactive "p") | |
1335 | (c-forward-conditional count 1 t) | |
1336 | (c-keep-region-active)) | |
1337 | ||
1338 | (defun c-backward-conditional (count &optional target-depth with-else) | |
785eecbb RS |
1339 | "Move back across a preprocessor conditional, leaving mark behind. |
1340 | A prefix argument acts as a repeat count. With a negative argument, | |
1341 | move forward across a preprocessor conditional." | |
1342 | (interactive "p") | |
51f606de | 1343 | (c-forward-conditional (- count) target-depth with-else) |
785eecbb RS |
1344 | (c-keep-region-active)) |
1345 | ||
51f606de | 1346 | (defun c-forward-conditional (count &optional target-depth with-else) |
785eecbb RS |
1347 | "Move forward across a preprocessor conditional, leaving mark behind. |
1348 | A prefix argument acts as a repeat count. With a negative argument, | |
51f606de GM |
1349 | move backward across a preprocessor conditional. |
1350 | ||
1351 | `#elif' is treated like `#else' followed by `#if', except that the | |
1352 | nesting level isn't changed when tracking subconditionals. | |
1353 | ||
1354 | The optional argument TARGET-DEPTH specifies the wanted nesting depth | |
1355 | after each scan. I.e. if TARGET-DEPTH is -1, the function will move | |
1356 | out of the enclosing conditional. A non-integer non-nil TARGET-DEPTH | |
1357 | counts as -1. | |
1358 | ||
1359 | If the optional argument WITH-ELSE is non-nil, `#else' directives are | |
1360 | treated as conditional clause limits. Normally they are ignored." | |
785eecbb RS |
1361 | (interactive "p") |
1362 | (let* ((forward (> count 0)) | |
1363 | (increment (if forward -1 1)) | |
1364 | (search-function (if forward 're-search-forward 're-search-backward)) | |
1365 | (new)) | |
51f606de GM |
1366 | (unless (integerp target-depth) |
1367 | (setq target-depth (if target-depth -1 0))) | |
785eecbb RS |
1368 | (save-excursion |
1369 | (while (/= count 0) | |
51f606de GM |
1370 | (let ((depth 0) |
1371 | ;; subdepth is the depth in "uninteresting" subtrees, | |
1372 | ;; i.e. those that takes us farther from the target | |
1373 | ;; depth instead of closer. | |
1374 | (subdepth 0) | |
1375 | found) | |
785eecbb RS |
1376 | (save-excursion |
1377 | ;; Find the "next" significant line in the proper direction. | |
1378 | (while (and (not found) | |
1379 | ;; Rather than searching for a # sign that | |
1380 | ;; comes at the beginning of a line aside from | |
1381 | ;; whitespace, search first for a string | |
1382 | ;; starting with # sign. Then verify what | |
1383 | ;; precedes it. This is faster on account of | |
1384 | ;; the fastmap feature of the regexp matcher. | |
1385 | (funcall search-function | |
51f606de | 1386 | "#[ \t]*\\(if\\|elif\\|endif\\|else\\)" |
785eecbb RS |
1387 | nil t)) |
1388 | (beginning-of-line) | |
1389 | ;; Now verify it is really a preproc line. | |
51f606de GM |
1390 | (if (looking-at "^[ \t]*#[ \t]*\\(if\\|elif\\|endif\\|else\\)") |
1391 | (let (dchange (directive (match-string 1))) | |
1392 | (cond ((string= directive "if") | |
1393 | (setq dchange (- increment))) | |
1394 | ((string= directive "endif") | |
1395 | (setq dchange increment)) | |
1396 | ((= subdepth 0) | |
1397 | ;; When we're not in an "uninteresting" | |
1398 | ;; subtree, we might want to act on "elif" | |
1399 | ;; and "else" too. | |
1400 | (if (cond (with-else | |
1401 | ;; Always move toward the target depth. | |
1402 | (setq dchange | |
1403 | (if (> target-depth 0) 1 -1))) | |
1404 | ((string= directive "elif") | |
1405 | (setq dchange (- increment)))) | |
1406 | ;; Ignore the change if it'd take us | |
1407 | ;; into an "uninteresting" subtree. | |
1408 | (if (eq (> dchange 0) (<= target-depth 0)) | |
1409 | (setq dchange nil))))) | |
1410 | (when dchange | |
1411 | (when (or (/= subdepth 0) | |
1412 | (eq (> dchange 0) (<= target-depth 0))) | |
1413 | (setq subdepth (+ subdepth dchange))) | |
1414 | (setq depth (+ depth dchange)) | |
1415 | ;; If we are trying to move across, and we find an | |
1416 | ;; end before we find a beginning, get an error. | |
1417 | (if (and (< depth target-depth) (< dchange 0)) | |
1418 | (error (if forward | |
1419 | "No following conditional at this level" | |
1420 | "No previous conditional at this level")))) | |
785eecbb RS |
1421 | ;; When searching forward, start from next line so |
1422 | ;; that we don't find the same line again. | |
1423 | (if forward (forward-line 1)) | |
51f606de GM |
1424 | ;; We found something if we've arrived at the |
1425 | ;; target depth. | |
1426 | (if (and dchange (= depth target-depth)) | |
785eecbb RS |
1427 | (setq found (point)))) |
1428 | ;; else | |
51f606de | 1429 | (if forward (forward-line 1))))) |
785eecbb RS |
1430 | (or found |
1431 | (error "No containing preprocessor conditional")) | |
1432 | (goto-char (setq new found))) | |
1433 | (setq count (+ count increment)))) | |
1434 | (push-mark) | |
1435 | (goto-char new)) | |
1436 | (c-keep-region-active)) | |
1437 | ||
1438 | \f | |
1439 | ;; commands to indent lines, regions, defuns, and expressions | |
b8ded794 | 1440 | (defun c-indent-command (&optional arg) |
785eecbb RS |
1441 | "Indent current line as C code, and/or insert some whitespace. |
1442 | ||
1443 | If `c-tab-always-indent' is t, always just indent the current line. | |
1444 | If nil, indent the current line only if point is at the left margin or | |
1445 | in the line's indentation; otherwise insert some whitespace[*]. If | |
1446 | other than nil or t, then some whitespace[*] is inserted only within | |
1447 | literals (comments and strings) and inside preprocessor directives, | |
1448 | but the line is always reindented. | |
1449 | ||
b8ded794 GM |
1450 | If `c-syntactic-indentation' is t, indentation is done according to |
1451 | the syntactic context. If it's nil, the line is just indented one | |
1452 | step according to `c-basic-offset'. In this mode, a numeric argument | |
1453 | indents a number of such steps, positive or negative, and an empty | |
1454 | prefix argument is equivalent to -1. | |
1455 | ||
1456 | If `c-syntactic-indentation' is t, then a numeric argument, regardless | |
1457 | of its value, means indent rigidly all the lines of the expression | |
1458 | starting after point so that this line becomes properly indented. The | |
1459 | relative indentation among the lines of the expression is preserved. | |
785eecbb RS |
1460 | |
1461 | [*] The amount and kind of whitespace inserted is controlled by the | |
1462 | variable `c-insert-tab-function', which is called to do the actual | |
1463 | insertion of whitespace. Normally the function in this variable | |
1464 | just inserts a tab character, or the equivalent number of spaces, | |
1465 | depending on the variable `indent-tabs-mode'." | |
1466 | ||
b8ded794 GM |
1467 | (interactive "p") |
1468 | (let ((bod (c-point 'bod)) | |
1469 | (indent-function | |
1470 | (if c-syntactic-indentation | |
130c507e | 1471 | (symbol-function 'indent-according-to-mode) |
b8ded794 GM |
1472 | (lambda () |
1473 | (let ((steps (cond ((not current-prefix-arg) 1) | |
1474 | ((equal current-prefix-arg '(4)) -1) | |
1475 | (t arg)))) | |
1476 | (c-shift-line-indentation (* steps c-basic-offset))) | |
1477 | )))) | |
1478 | (if (and c-syntactic-indentation current-prefix-arg) | |
1479 | ;; If c-syntactic-indentation and got arg, always indent this | |
1480 | ;; line as C and shift remaining lines of expression the same | |
1481 | ;; amount. | |
130c507e GM |
1482 | (let ((shift-amt (save-excursion |
1483 | (back-to-indentation) | |
1484 | (current-column))) | |
785eecbb | 1485 | beg end) |
130c507e GM |
1486 | (c-indent-line) |
1487 | (setq shift-amt (- (save-excursion | |
1488 | (back-to-indentation) | |
1489 | (current-column)) | |
1490 | shift-amt)) | |
785eecbb RS |
1491 | (save-excursion |
1492 | (if (eq c-tab-always-indent t) | |
1493 | (beginning-of-line)) | |
1494 | (setq beg (point)) | |
0ec8351b | 1495 | (c-forward-sexp 1) |
785eecbb RS |
1496 | (setq end (point)) |
1497 | (goto-char beg) | |
1498 | (forward-line 1) | |
1499 | (setq beg (point))) | |
1500 | (if (> end beg) | |
130c507e | 1501 | (indent-code-rigidly beg end shift-amt "#"))) |
b8ded794 | 1502 | ;; Else use c-tab-always-indent to determine behavior. |
785eecbb RS |
1503 | (cond |
1504 | ;; CASE 1: indent when at column zero or in lines indentation, | |
1505 | ;; otherwise insert a tab | |
1506 | ((not c-tab-always-indent) | |
1507 | (if (save-excursion | |
1508 | (skip-chars-backward " \t") | |
1509 | (not (bolp))) | |
1510 | (funcall c-insert-tab-function) | |
b8ded794 | 1511 | (funcall indent-function))) |
785eecbb RS |
1512 | ;; CASE 2: just indent the line |
1513 | ((eq c-tab-always-indent t) | |
b8ded794 | 1514 | (funcall indent-function)) |
785eecbb RS |
1515 | ;; CASE 3: if in a literal, insert a tab, but always indent the |
1516 | ;; line | |
1517 | (t | |
1518 | (if (c-in-literal bod) | |
1519 | (funcall c-insert-tab-function)) | |
b8ded794 | 1520 | (funcall indent-function) |
785eecbb RS |
1521 | ))))) |
1522 | ||
1523 | (defun c-indent-exp (&optional shutup-p) | |
130c507e GM |
1524 | "Indent each line in the balanced expression following point syntactically. |
1525 | If optional SHUTUP-P is non-nil, no errors are signalled if no | |
1526 | balanced expression is found." | |
28c236de | 1527 | (interactive "*P") |
51f606de | 1528 | (let ((here (point-marker)) |
130c507e | 1529 | end) |
51f606de | 1530 | (set-marker-insertion-type here t) |
785eecbb | 1531 | (unwind-protect |
130c507e | 1532 | (let ((start (progn |
785eecbb RS |
1533 | ;; try to be smarter about finding the range of |
1534 | ;; lines to indent. skip all following | |
130c507e GM |
1535 | ;; whitespace, then try to find any |
1536 | ;; opening paren on the current line | |
785eecbb | 1537 | (skip-chars-forward " \t\n") |
130c507e GM |
1538 | (save-restriction |
1539 | (narrow-to-region (point-min) (c-point 'eol)) | |
1540 | (c-safe (1- (scan-lists (point) 1 -1))))))) | |
785eecbb | 1541 | ;; find balanced expression end |
0ec8351b | 1542 | (setq end (and (c-safe (progn (c-forward-sexp 1) t)) |
130c507e | 1543 | (point))) |
785eecbb | 1544 | ;; sanity check |
130c507e GM |
1545 | (if (not start) |
1546 | (unless shutup-p | |
1547 | (error "Cannot find start of balanced expression to indent")) | |
19da29f9 GM |
1548 | (goto-char start) |
1549 | (forward-line) | |
1550 | (setq start (point)) | |
130c507e GM |
1551 | (if (not end) |
1552 | (unless shutup-p | |
1553 | (error "Cannot find end of balanced expression to indent")) | |
19da29f9 GM |
1554 | (if (< start end) |
1555 | (c-indent-region start end))))) | |
51f606de GM |
1556 | (goto-char here) |
1557 | (set-marker here nil)))) | |
785eecbb RS |
1558 | |
1559 | (defun c-indent-defun () | |
130c507e | 1560 | "Indent the current top-level function def, struct or class declaration |
b8ded794 | 1561 | syntactically." |
28c236de | 1562 | (interactive "*") |
785eecbb RS |
1563 | (let ((here (point-marker)) |
1564 | (c-echo-syntactic-information-p nil) | |
1565 | (brace (c-least-enclosing-brace (c-parse-state)))) | |
28c236de | 1566 | (goto-char (or brace (c-point 'bod))) |
785eecbb RS |
1567 | ;; if we're sitting at b-o-b, it might be because there was no |
1568 | ;; least enclosing brace and we were sitting on the defun's open | |
1569 | ;; brace. | |
1570 | (if (and (bobp) (not (eq (char-after) ?\{))) | |
1571 | (goto-char here)) | |
1572 | ;; if defun-prompt-regexp is non-nil, b-o-d might not leave us at | |
1573 | ;; the open brace. I consider this an Emacs bug. | |
1574 | (and (boundp 'defun-prompt-regexp) | |
1575 | defun-prompt-regexp | |
1576 | (looking-at defun-prompt-regexp) | |
1577 | (goto-char (match-end 0))) | |
1578 | ;; catch all errors in c-indent-exp so we can 1. give more | |
1579 | ;; meaningful error message, and 2. restore point | |
1580 | (unwind-protect | |
1581 | (c-indent-exp) | |
1582 | (goto-char here) | |
1583 | (set-marker here nil)))) | |
1584 | ||
130c507e GM |
1585 | (defun c-indent-region (start end &optional quiet) |
1586 | "Indent every line whose first char is between START and END inclusive. | |
1587 | Be silent about syntactic errors if the optional argument QUIET is non-nil." | |
785eecbb RS |
1588 | (save-excursion |
1589 | (goto-char start) | |
1590 | ;; Advance to first nonblank line. | |
1591 | (skip-chars-forward " \t\n") | |
1592 | (beginning-of-line) | |
130c507e GM |
1593 | (setq c-parsing-error |
1594 | (or (let ((endmark (copy-marker end)) | |
1595 | (c-parsing-error nil) | |
1596 | ;; shut up any echo msgs on indiv lines | |
1597 | (c-echo-syntactic-information-p nil)) | |
1598 | (unwind-protect | |
1599 | (progn | |
1600 | (c-progress-init start end 'c-indent-region) | |
1601 | (while (and (bolp) | |
1602 | (not (eobp)) | |
1603 | (< (point) endmark)) | |
1604 | ;; update progress | |
1605 | (c-progress-update) | |
1606 | ;; skip blank lines | |
1607 | (skip-chars-forward " \t\n") | |
1608 | (beginning-of-line) | |
1609 | ;; indent the current line | |
1610 | (c-indent-line nil t) | |
1611 | (forward-line))) | |
1612 | (set-marker endmark nil) | |
1613 | (c-progress-fini 'c-indent-region)) | |
1614 | (c-echo-parsing-error quiet)) | |
1615 | c-parsing-error)))) | |
785eecbb RS |
1616 | |
1617 | (defun c-mark-function () | |
0ec8351b | 1618 | "Put mark at end of current top-level defun, point at beginning." |
785eecbb RS |
1619 | (interactive) |
1620 | (let ((here (point)) | |
0ec8351b BW |
1621 | (eod (c-point 'eod)) |
1622 | (state (c-parse-state))) | |
1623 | ;; Are we sitting at the top level, someplace between either the | |
1624 | ;; beginning of buffer, or the nearest preceding defun? If so, | |
1625 | ;; try first to figure out whether we're sitting on the | |
1626 | ;; introduction to a top-level defun, in which case we want to | |
1627 | ;; mark the entire defun we're sitting on. | |
1628 | ;; | |
1629 | ;; If we're sitting on anything else at the top-level, we want to | |
1630 | ;; just mark the statement that we're on | |
1631 | (if (or (and (consp (car state)) | |
1632 | (= (length state) 1)) | |
1633 | (null state)) | |
1634 | ;; Are we in the whitespace after the nearest preceding defun? | |
1635 | (if (and state | |
1636 | (looking-at "[ \t]*$") | |
1637 | (= (save-excursion | |
1638 | (c-backward-syntactic-ws) | |
1639 | (skip-chars-backward ";") | |
1640 | (point)) | |
130c507e | 1641 | (cdr (car state)))) |
0ec8351b BW |
1642 | (progn |
1643 | (setq eod (point)) | |
130c507e | 1644 | (goto-char (car (car state))) |
0ec8351b BW |
1645 | (c-beginning-of-statement-1)) |
1646 | (if (= ?{ (save-excursion | |
1647 | (c-end-of-statement-1) | |
1648 | (char-before))) | |
1649 | ;; We must be in a defuns's introduction | |
1650 | (progn | |
1651 | (c-end-of-statement-1) | |
1652 | (skip-chars-backward "{") | |
1653 | (c-beginning-of-statement-1) | |
1654 | (c-forward-syntactic-ws)) | |
1655 | ;; Just mark the statement | |
1656 | (c-end-of-statement-1) | |
1657 | (forward-line 1) | |
1658 | (setq eod (point)) | |
1659 | (c-beginning-of-statement-1))) | |
1660 | ;; We are inside some enclosing brace structure, so we first | |
1661 | ;; need to find our way to the least enclosing brace. Then, in | |
1662 | ;; both cases, we to mark the region from the beginning of the | |
1663 | ;; current statement, until the end of the next following defun | |
1664 | (while (and state) | |
1665 | (or (consp (car state)) | |
1666 | (goto-char (car state))) | |
1667 | (setq state (cdr state))) | |
1668 | (c-beginning-of-statement-1)) | |
785eecbb RS |
1669 | (push-mark here) |
1670 | (push-mark eod nil t))) | |
1671 | ||
130c507e GM |
1672 | (defun c-fn-region-is-active-p () |
1673 | ;; Function version of the macro for use in places that aren't | |
1674 | ;; compiled, e.g. in the menus. | |
1675 | (c-region-is-active-p)) | |
1676 | ||
0ec8351b BW |
1677 | (defun c-indent-line-or-region () |
1678 | "When the region is active, indent it. Otherwise indent the current line." | |
1679 | ;; Emacs has a variable called mark-active, XEmacs uses region-active-p | |
1680 | (interactive) | |
1681 | (if (c-region-is-active-p) | |
1682 | (c-indent-region (region-beginning) (region-end)) | |
130c507e | 1683 | (indent-according-to-mode))) |
0ec8351b | 1684 | |
785eecbb RS |
1685 | \f |
1686 | ;; for progress reporting | |
1687 | (defvar c-progress-info nil) | |
1688 | ||
1689 | (defun c-progress-init (start end context) | |
a7c7b186 KH |
1690 | (cond |
1691 | ;; Be silent | |
1692 | ((not c-progress-interval)) | |
1693 | ;; Start the progress update messages. If this Emacs doesn't have | |
1694 | ;; a built-in timer, just be dumb about it. | |
1695 | ((not (fboundp 'current-time)) | |
130c507e | 1696 | (message "Indenting region... (this may take a while)")) |
a7c7b186 KH |
1697 | ;; If progress has already been initialized, do nothing. otherwise |
1698 | ;; initialize the counter with a vector of: | |
1699 | ;; [start end lastsec context] | |
1700 | (c-progress-info) | |
1701 | (t (setq c-progress-info (vector start | |
785eecbb RS |
1702 | (save-excursion |
1703 | (goto-char end) | |
1704 | (point-marker)) | |
1705 | (nth 1 (current-time)) | |
1706 | context)) | |
130c507e | 1707 | (message "Indenting region...")) |
a7c7b186 | 1708 | )) |
785eecbb RS |
1709 | |
1710 | (defun c-progress-update () | |
1711 | ;; update progress | |
1712 | (if (not (and c-progress-info c-progress-interval)) | |
1713 | nil | |
1714 | (let ((now (nth 1 (current-time))) | |
1715 | (start (aref c-progress-info 0)) | |
1716 | (end (aref c-progress-info 1)) | |
1717 | (lastsecs (aref c-progress-info 2))) | |
1718 | ;; should we update? currently, update happens every 2 seconds, | |
1719 | ;; what's the right value? | |
1720 | (if (< c-progress-interval (- now lastsecs)) | |
1721 | (progn | |
130c507e | 1722 | (message "Indenting region... (%d%% complete)" |
785eecbb RS |
1723 | (/ (* 100 (- (point) start)) (- end start))) |
1724 | (aset c-progress-info 2 now))) | |
1725 | ))) | |
1726 | ||
1727 | (defun c-progress-fini (context) | |
1728 | ;; finished | |
a7c7b186 KH |
1729 | (if (not c-progress-interval) |
1730 | nil | |
1731 | (if (or (eq context (aref c-progress-info 3)) | |
1732 | (eq context t)) | |
1733 | (progn | |
1734 | (set-marker (aref c-progress-info 1) nil) | |
1735 | (setq c-progress-info nil) | |
130c507e | 1736 | (message "Indenting region... done"))))) |
785eecbb RS |
1737 | |
1738 | ||
1739 | \f | |
1740 | ;;; This page handles insertion and removal of backslashes for C macros. | |
1741 | ||
1742 | (defun c-backslash-region (from to delete-flag) | |
1743 | "Insert, align, or delete end-of-line backslashes on the lines in the region. | |
1744 | With no argument, inserts backslashes and aligns existing backslashes. | |
1745 | With an argument, deletes the backslashes. | |
1746 | ||
1747 | This function does not modify blank lines at the start of the region. | |
1748 | If the region ends at the start of a line, it always deletes the | |
1749 | backslash (if any) at the end of the previous line. | |
0ec8351b | 1750 | |
785eecbb RS |
1751 | You can put the region around an entire macro definition and use this |
1752 | command to conveniently insert and align the necessary backslashes." | |
28c236de | 1753 | (interactive "*r\nP") |
785eecbb RS |
1754 | (save-excursion |
1755 | (goto-char from) | |
1756 | (let ((column c-backslash-column) | |
1757 | (endmark (make-marker))) | |
1758 | (move-marker endmark to) | |
1759 | ;; Compute the smallest column number past the ends of all the lines. | |
1760 | (if (not delete-flag) | |
1761 | (while (< (point) to) | |
1762 | (end-of-line) | |
1763 | (if (eq (char-before) ?\\) | |
1764 | (progn (forward-char -1) | |
1765 | (skip-chars-backward " \t"))) | |
1766 | (setq column (max column (1+ (current-column)))) | |
1767 | (forward-line 1))) | |
1768 | ;; Adjust upward to a tab column, if that doesn't push past the margin. | |
1769 | (if (> (% column tab-width) 0) | |
1770 | (let ((adjusted (* (/ (+ column tab-width -1) tab-width) tab-width))) | |
1771 | (if (< adjusted (window-width)) | |
1772 | (setq column adjusted)))) | |
1773 | ;; Don't modify blank lines at start of region. | |
1774 | (goto-char from) | |
1775 | (while (and (< (point) endmark) (eolp)) | |
1776 | (forward-line 1)) | |
1777 | ;; Add or remove backslashes on all the lines. | |
1778 | (while (< (point) endmark) | |
1779 | (if (and (not delete-flag) | |
1780 | ;; Un-backslashify the last line | |
1781 | ;; if the region ends right at the start of the next line. | |
1782 | (save-excursion | |
1783 | (forward-line 1) | |
1784 | (< (point) endmark))) | |
1785 | (c-append-backslash column) | |
1786 | (c-delete-backslash)) | |
1787 | (forward-line 1)) | |
28c236de | 1788 | (move-marker endmark nil)))) |
785eecbb RS |
1789 | |
1790 | (defun c-append-backslash (column) | |
1791 | (end-of-line) | |
1792 | (if (eq (char-before) ?\\) | |
1793 | (progn (forward-char -1) | |
1794 | (delete-horizontal-space) | |
1795 | (indent-to column)) | |
1796 | (indent-to column) | |
1797 | (insert "\\"))) | |
1798 | ||
1799 | (defun c-delete-backslash () | |
1800 | (end-of-line) | |
1801 | (or (bolp) | |
1802 | (progn | |
1803 | (forward-char -1) | |
1804 | (if (looking-at "\\\\") | |
1805 | (delete-region (1+ (point)) | |
1806 | (progn (skip-chars-backward " \t") (point))))))) | |
1807 | ||
51f606de | 1808 | |
785eecbb | 1809 | \f |
51f606de GM |
1810 | ;;; Line breaking and paragraph filling. |
1811 | ||
130c507e GM |
1812 | (defvar c-auto-fill-prefix t) |
1813 | (defvar c-lit-limits nil) | |
1814 | (defvar c-lit-type nil) | |
1815 | ||
51f606de GM |
1816 | ;; The filling code is based on a simple theory; leave the intricacies |
1817 | ;; of the text handling to the currently active mode for that | |
1818 | ;; (e.g. adaptive-fill-mode or filladapt-mode) and do as little as | |
1819 | ;; possible to make them work correctly wrt the comment and string | |
1820 | ;; separators, one-line paragraphs etc. Unfortunately, when it comes | |
1821 | ;; to it, there's quite a lot of special cases to handle which makes | |
1822 | ;; the code anything but simple. The intention is that it will work | |
1823 | ;; with any well-written text filling package that preserves a fill | |
1824 | ;; prefix. | |
1825 | ;; | |
1826 | ;; We temporarily mask comment starters and enders as necessary for | |
1827 | ;; the filling code to do its job on a seemingly normal text block. | |
1828 | ;; We do _not_ mask the fill prefix, so it's up to the filling code to | |
1829 | ;; preserve it correctly (especially important when filling C++ style | |
1830 | ;; line comments). By default, we set up and use adaptive-fill-mode, | |
1831 | ;; which is standard in all supported Emacs flavors. | |
1832 | ||
1833 | (defun c-guess-fill-prefix (lit-limits lit-type) | |
1834 | ;; Determine the appropriate comment fill prefix for a block or line | |
1835 | ;; comment. Return a cons of the prefix string and the column where | |
1836 | ;; it ends. If fill-prefix is set, it'll override. Note that this | |
1837 | ;; function also uses the value of point in some heuristics. | |
1838 | (let* ((here (point)) | |
1839 | (prefix-regexp (concat "[ \t]*\\(" | |
130c507e | 1840 | c-current-comment-prefix |
51f606de GM |
1841 | "\\)[ \t]*")) |
1842 | (comment-start-regexp (if (eq lit-type 'c++) | |
1843 | prefix-regexp | |
1844 | comment-start-skip)) | |
130c507e | 1845 | prefix-line comment-prefix res comment-text-end) |
51f606de GM |
1846 | (cond |
1847 | (fill-prefix | |
1848 | (setq res (cons fill-prefix | |
1849 | ;; Ugly way of getting the column after the fill | |
1850 | ;; prefix; it'd be nice with a current-column | |
1851 | ;; that works on strings.. | |
1852 | (let ((buffer-modified (buffer-modified-p)) | |
1853 | (buffer-undo-list t) | |
1854 | (start (point))) | |
1855 | (unwind-protect | |
1856 | (progn | |
1857 | (insert ?\n fill-prefix) | |
1858 | (current-column)) | |
1859 | (delete-region start (point)) | |
1860 | (set-buffer-modified-p buffer-modified)))))) | |
1861 | ((eq lit-type 'c++) | |
1862 | (save-excursion | |
1863 | ;; Set fallback for comment-prefix if none is found. | |
130c507e GM |
1864 | (setq comment-prefix "// " |
1865 | comment-text-end (cdr lit-limits)) | |
51f606de GM |
1866 | (beginning-of-line) |
1867 | (if (> (point) (car lit-limits)) | |
1868 | ;; The current line is not the comment starter, so the | |
1869 | ;; comment has more than one line, and it can therefore be | |
1870 | ;; used to find the comment fill prefix. | |
1871 | (setq prefix-line (point)) | |
1872 | (goto-char (car lit-limits)) | |
1873 | (if (and (= (forward-line 1) 0) | |
1874 | (< (point) (cdr lit-limits))) | |
1875 | ;; The line after the comment starter is inside the | |
1876 | ;; comment, so we can use it. | |
1877 | (setq prefix-line (point)) | |
1878 | ;; The comment is only one line. Take the comment prefix | |
1879 | ;; from it and keep the indentation. | |
1880 | (goto-char (car lit-limits)) | |
1881 | (if (looking-at prefix-regexp) | |
1882 | (goto-char (match-end 0)) | |
1883 | (forward-char 2) | |
1884 | (skip-chars-forward " \t")) | |
1885 | (setq res | |
1886 | (if (eq (c-point 'boi) (car lit-limits)) | |
1887 | ;; There is only whitespace before the comment | |
1888 | ;; starter; take the prefix straight from this | |
1889 | ;; line. | |
1890 | (cons (buffer-substring-no-properties | |
1891 | (c-point 'bol) (point)) | |
1892 | (current-column)) | |
1893 | ;; There is code before the comment starter, so we | |
1894 | ;; have to temporarily insert and indent a new | |
1895 | ;; line to get the right space/tab mix in the | |
1896 | ;; indentation. | |
1897 | (let ((buffer-modified (buffer-modified-p)) | |
1898 | (buffer-undo-list t) | |
1899 | (prefix-len (- (point) (car lit-limits))) | |
1900 | tmp) | |
1901 | (unwind-protect | |
1902 | (progn | |
1903 | (goto-char (car lit-limits)) | |
1904 | (indent-to (prog1 (current-column) | |
1905 | (insert ?\n))) | |
1906 | (setq tmp (point)) | |
1907 | (forward-char prefix-len) | |
1908 | (cons (buffer-substring-no-properties | |
1909 | (c-point 'bol) (point)) | |
1910 | (current-column))) | |
1911 | (delete-region (car lit-limits) tmp) | |
1912 | (set-buffer-modified-p buffer-modified)))) | |
1913 | ))))) | |
1914 | (t | |
1915 | (save-excursion | |
130c507e | 1916 | (setq comment-text-end (- (cdr lit-limits) 2)) |
51f606de GM |
1917 | (beginning-of-line) |
1918 | (if (and (> (point) (car lit-limits)) | |
1919 | (not (and (looking-at "[ \t]*\\*/") | |
1920 | (eq (cdr lit-limits) (match-end 0))))) | |
1921 | ;; The current line is not the comment starter and | |
1922 | ;; contains more than just the ender, so it's good enough | |
1923 | ;; to be used for the comment fill prefix. | |
1924 | (setq prefix-line (point)) | |
1925 | (goto-char (car lit-limits)) | |
1926 | (if (or (/= (forward-line 1) 0) | |
1927 | (>= (point) (cdr lit-limits)) | |
1928 | (and (looking-at "[ \t]*\\*/") | |
1929 | (eq (cdr lit-limits) (match-end 0))) | |
1930 | (and (looking-at prefix-regexp) | |
1931 | (<= (1- (cdr lit-limits)) (match-end 0))) | |
1932 | (and (< here (point)) | |
1933 | (or (not (match-beginning 0)) | |
1934 | (looking-at "[ \t]*$")))) | |
1935 | ;; The comment is either one line or the next line | |
1936 | ;; contains just the comment ender. Also, if point is | |
1937 | ;; on the comment opener line and the following line is | |
130c507e | 1938 | ;; empty or doesn't match c-current-comment-prefix we |
51f606de GM |
1939 | ;; assume that this is in fact a not yet closed one line |
1940 | ;; comment, so we shouldn't look for the comment prefix | |
1941 | ;; on the next line. In these cases we have no | |
1942 | ;; information about a suitable comment prefix, so we | |
1943 | ;; resort to c-block-comment-prefix. | |
1944 | (setq comment-prefix (or c-block-comment-prefix "") | |
1945 | res (let ((buffer-modified (buffer-modified-p)) | |
1946 | (buffer-undo-list t) | |
1947 | tmp-pre tmp-post) | |
1948 | ;; The comment doesn't give any information | |
1949 | ;; about the indentation column. We'll have to | |
1950 | ;; temporarily insert a new comment line and | |
1951 | ;; indent it to find the correct column. | |
1952 | (unwind-protect | |
1953 | (progn | |
1954 | (goto-char (car lit-limits)) | |
1955 | (if (looking-at comment-start-regexp) | |
1956 | (goto-char (match-end 0)) | |
1957 | (forward-char 2) | |
1958 | (skip-chars-forward " \t")) | |
1959 | (when (eq (char-syntax (char-before)) ?\ ) | |
1960 | ;; If there's ws on the current | |
1961 | ;; line, we'll use it instead of | |
1962 | ;; what's ending comment-prefix. | |
1963 | (setq comment-prefix | |
1964 | (concat (substring comment-prefix | |
1965 | 0 (string-match | |
1966 | "\\s *\\'" | |
1967 | comment-prefix)) | |
1968 | (buffer-substring-no-properties | |
1969 | (save-excursion | |
1970 | (skip-chars-backward " \t") | |
1971 | (point)) | |
1972 | (point))))) | |
1973 | (setq tmp-pre (point-marker)) | |
1974 | ;; We insert an extra non-whitespace | |
1975 | ;; character before the line break and | |
1976 | ;; after comment-prefix in case it's | |
1977 | ;; "" or ends with whitespace. | |
1978 | (insert "x\n" comment-prefix ?x) | |
1979 | (setq tmp-post (point-marker)) | |
130c507e | 1980 | (indent-according-to-mode) |
51f606de GM |
1981 | (goto-char (1- tmp-post)) |
1982 | (cons (buffer-substring-no-properties | |
1983 | (c-point 'bol) (point)) | |
1984 | (current-column))) | |
1985 | (when tmp-post | |
1986 | (delete-region tmp-pre tmp-post) | |
1987 | (set-marker tmp-pre nil) | |
1988 | (set-marker tmp-post nil)) | |
1989 | (set-buffer-modified-p buffer-modified)))) | |
1990 | ;; Otherwise the line after the comment starter is good | |
1991 | ;; enough to find the prefix in. | |
1992 | (setq prefix-line (point))))))) | |
1993 | (or res | |
1994 | (save-excursion | |
1995 | ;; prefix-line is the bol of a line on which we should try | |
1996 | ;; to find the prefix. | |
1997 | (let* (fb-string fb-endpos ; Contains any fallback prefix found. | |
1998 | (test-line | |
1999 | (lambda () | |
2000 | (when (and (looking-at prefix-regexp) | |
130c507e GM |
2001 | (<= (match-end 0) comment-text-end)) |
2002 | (unless (eq (match-end 0) (c-point 'eol)) | |
2003 | ;; The match is fine if there's text after it. | |
2004 | (throw 'found (cons (buffer-substring-no-properties | |
2005 | (match-beginning 0) (match-end 0)) | |
2006 | (progn (goto-char (match-end 0)) | |
2007 | (current-column))))) | |
51f606de | 2008 | (unless fb-string |
130c507e GM |
2009 | ;; This match is better than nothing, so let's |
2010 | ;; remember it in case nothing better is found | |
2011 | ;; on another line. | |
51f606de GM |
2012 | (setq fb-string (buffer-substring-no-properties |
2013 | (match-beginning 0) (match-end 0)) | |
2014 | fb-endpos (match-end 0))) | |
51f606de | 2015 | t)))) |
130c507e | 2016 | (or (catch 'found |
51f606de GM |
2017 | ;; Search for a line which has text after the prefix |
2018 | ;; so that we get the proper amount of whitespace | |
2019 | ;; after it. We start with the current line, then | |
2020 | ;; search backwards, then forwards. | |
2021 | (goto-char prefix-line) | |
2022 | (when (and (funcall test-line) | |
130c507e GM |
2023 | (or (/= (match-end 1) (match-end 0)) |
2024 | ;; The whitespace is sucked up by the | |
2025 | ;; first [ \t]* glob if the prefix is empty. | |
2026 | (and (= (match-beginning 1) (match-end 1)) | |
2027 | (/= (match-beginning 0) (match-end 0))))) | |
51f606de GM |
2028 | ;; If the current line doesn't have text but do |
2029 | ;; have whitespace after the prefix, we'll use it. | |
130c507e GM |
2030 | (throw 'found (cons fb-string |
2031 | (progn (goto-char fb-endpos) | |
2032 | (current-column))))) | |
2033 | (if (eq lit-type 'c++) | |
2034 | ;; For line comments we can search up to and | |
2035 | ;; including the first line. | |
2036 | (while (and (zerop (forward-line -1)) | |
2037 | (>= (point) (car lit-limits))) | |
2038 | (funcall test-line)) | |
2039 | ;; For block comments we must stop before the | |
2040 | ;; block starter. | |
2041 | (while (and (zerop (forward-line -1)) | |
2042 | (> (point) (car lit-limits))) | |
2043 | (funcall test-line))) | |
51f606de GM |
2044 | (goto-char prefix-line) |
2045 | (while (and (zerop (forward-line 1)) | |
2046 | (< (point) (cdr lit-limits))) | |
2047 | (funcall test-line)) | |
130c507e | 2048 | (goto-char prefix-line) |
51f606de | 2049 | nil) |
130c507e | 2050 | (when fb-string |
51f606de GM |
2051 | ;; A good line wasn't found, but at least we have a |
2052 | ;; fallback that matches the comment prefix regexp. | |
2053 | (cond ((string-match "\\s \\'" fb-string) | |
2054 | ;; There are ws after the prefix, so let's use it. | |
2055 | (cons fb-string | |
2056 | (progn (goto-char fb-endpos) (current-column)))) | |
2057 | ((progn | |
2058 | ;; Check if there's any whitespace padding | |
2059 | ;; on the comment start line that we can | |
2060 | ;; use after the prefix. | |
2061 | (goto-char (car lit-limits)) | |
2062 | (if (looking-at comment-start-regexp) | |
2063 | (goto-char (match-end 0)) | |
2064 | (forward-char 2) | |
2065 | (skip-chars-forward " \t")) | |
2066 | (eq (char-syntax (char-before)) ?\ )) | |
2067 | (setq fb-string (buffer-substring-no-properties | |
2068 | (save-excursion | |
2069 | (skip-chars-backward " \t") | |
2070 | (point)) | |
2071 | (point))) | |
2072 | (goto-char fb-endpos) | |
2073 | (skip-chars-backward " \t") | |
2074 | (let ((buffer-modified (buffer-modified-p)) | |
2075 | (buffer-undo-list t) | |
2076 | (tmp (point))) | |
2077 | ;; Got to mess in the buffer once again to | |
2078 | ;; ensure the column gets correct. :P | |
2079 | (unwind-protect | |
2080 | (progn | |
2081 | (insert fb-string) | |
2082 | (cons (buffer-substring-no-properties | |
2083 | (c-point 'bol) | |
2084 | (point)) | |
2085 | (current-column))) | |
130c507e GM |
2086 | (delete-region tmp (point)) |
2087 | (set-buffer-modified-p buffer-modified)))) | |
51f606de GM |
2088 | (t |
2089 | ;; Last resort: Just add a single space after | |
2090 | ;; the prefix. | |
2091 | (cons (concat fb-string " ") | |
2092 | (progn (goto-char fb-endpos) | |
130c507e | 2093 | (1+ (current-column))))))) |
51f606de GM |
2094 | ;; The line doesn't match the comment prefix regexp. |
2095 | (if comment-prefix | |
2096 | ;; We have a fallback for line comments that we must use. | |
2097 | (cons (concat (buffer-substring-no-properties | |
2098 | prefix-line (c-point 'boi)) | |
2099 | comment-prefix) | |
2100 | (progn (back-to-indentation) | |
2101 | (+ (current-column) (length comment-prefix)))) | |
2102 | ;; Assume we are dealing with a "free text" block | |
2103 | ;; comment where the lines doesn't have any comment | |
2104 | ;; prefix at all and we should just fill it as | |
2105 | ;; normal text. | |
130c507e | 2106 | '("" . 0)))))) |
51f606de GM |
2107 | )) |
2108 | ||
785eecbb RS |
2109 | (defun c-fill-paragraph (&optional arg) |
2110 | "Like \\[fill-paragraph] but handles C and C++ style comments. | |
51f606de GM |
2111 | If any of the current line is a comment or within a comment, fill the |
2112 | comment or the paragraph of it that point is in, preserving the | |
2113 | comment indentation or line-starting decorations (see the | |
2114 | `c-comment-prefix-regexp' and `c-block-comment-prefix' variables for | |
2115 | details). | |
785eecbb | 2116 | |
f23da29a RS |
2117 | If point is inside multiline string literal, fill it. This currently |
2118 | does not respect escaped newlines, except for the special case when it | |
2119 | is the very first thing in the string. The intended use for this rule | |
2120 | is in situations like the following: | |
2121 | ||
2122 | char description[] = \"\\ | |
2123 | A very long description of something that you want to fill to make | |
2124 | nicely formatted output.\"\; | |
2125 | ||
2126 | If point is in any other situation, i.e. in normal code, do nothing. | |
2127 | ||
785eecbb | 2128 | Optional prefix ARG means justify paragraph as well." |
28c236de | 2129 | (interactive "*P") |
51f606de GM |
2130 | (let (lit-limits lit-type fill |
2131 | ;; beg and end limits the region to be filled. end is a marker. | |
2132 | beg end | |
130c507e | 2133 | ;; tmp-pre and tmp-post mark strings that are temporarily |
51f606de GM |
2134 | ;; inserted at the start and end of the region. tmp-pre is a |
2135 | ;; cons of the positions of the prepended string. tmp-post is | |
2136 | ;; a marker pointing to the single character of the appended | |
2137 | ;; string. | |
2138 | tmp-pre tmp-post | |
130c507e GM |
2139 | ;; If hang-ender-stuck isn't nil, the comment ender is |
2140 | ;; hanging. In that case it's set to the number of spaces | |
2141 | ;; that should be between the text and the ender. | |
2142 | hang-ender-stuck | |
2143 | (here (point))) | |
51f606de GM |
2144 | ;; Restore point on undo. It's necessary since we do a lot of |
2145 | ;; hidden inserts and deletes below that should be as transparent | |
2146 | ;; as possible. | |
2147 | (if (and buffer-undo-list (not (eq buffer-undo-list t))) | |
2148 | (setq buffer-undo-list (cons (point) buffer-undo-list))) | |
130c507e GM |
2149 | (save-restriction |
2150 | ;; Widen to catch comment limits correctly. | |
2151 | (widen) | |
2152 | (setq lit-limits (c-collect-line-comments (c-literal-limits nil t)) | |
2153 | lit-type (c-literal-type lit-limits))) | |
51f606de | 2154 | (save-excursion |
130c507e GM |
2155 | (unless (c-safe (backward-char) |
2156 | (forward-paragraph) | |
2157 | (>= (point) here)) | |
2158 | (goto-char here) | |
2159 | (forward-paragraph)) | |
2160 | (setq end (point-marker))) | |
2161 | (save-excursion | |
2162 | (unless (c-safe (forward-char) | |
2163 | (backward-paragraph) | |
2164 | (<= (point) here)) | |
2165 | (goto-char here) | |
2166 | (backward-paragraph)) | |
51f606de | 2167 | (setq beg (point))) |
130c507e GM |
2168 | (unwind-protect |
2169 | (progn | |
2170 | (cond | |
2171 | ((eq lit-type 'c++) ; Line comment. | |
2172 | (save-excursion | |
2173 | ;; Fill to the comment or paragraph end, whichever | |
2174 | ;; comes first. | |
2175 | (set-marker end (min end (cdr lit-limits))) | |
2176 | (when (<= beg (car lit-limits)) | |
2177 | ;; The region to be filled includes the comment | |
2178 | ;; starter, so we must check it. | |
2179 | (goto-char (car lit-limits)) | |
2180 | (back-to-indentation) | |
2181 | (if (eq (point) (car lit-limits)) | |
2182 | ;; Include the first line in the fill. | |
2183 | (setq beg (c-point 'bol)) | |
2184 | ;; The first line contains code before the | |
2185 | ;; comment. We must fake a line that doesn't. | |
2186 | (setq tmp-pre t))) | |
2187 | )) | |
2188 | ((eq lit-type 'c) ; Block comment. | |
2189 | (when (>= end (cdr lit-limits)) | |
2190 | ;; The region to be filled includes the comment ender. | |
2191 | (unless (save-excursion | |
2192 | (goto-char (cdr lit-limits)) | |
2193 | (beginning-of-line) | |
2194 | (and (looking-at (concat "[ \t]*\\(" | |
2195 | c-current-comment-prefix | |
2196 | "\\)\\*/")) | |
2197 | (eq (cdr lit-limits) (match-end 0)) | |
2198 | ;; Leave the comment ender on its own line. | |
2199 | (set-marker end (point)))) | |
2200 | ;; The comment ender should hang. Replace all cruft | |
2201 | ;; between it and the last word with one or two 'x' | |
2202 | ;; and include it in the fill. We'll change them back | |
2203 | ;; spaces afterwards. | |
2204 | (let* ((ender-start (save-excursion | |
2205 | (goto-char (cdr lit-limits)) | |
2206 | (skip-syntax-backward "^w ") | |
2207 | (point))) | |
2208 | (point-rel (- ender-start here)) | |
2209 | spaces) | |
2210 | (save-excursion | |
2211 | (goto-char (cdr lit-limits)) | |
2212 | (setq tmp-post (point-marker)) | |
2213 | (insert ?\n) | |
2214 | (set-marker end (point)) | |
2215 | (forward-line -1) | |
2216 | (if (and (looking-at (concat "[ \t]*\\(\\(" | |
2217 | c-current-comment-prefix | |
2218 | "\\)[ \t]*\\)")) | |
2219 | (eq ender-start (match-end 0))) | |
2220 | ;; The comment ender is prefixed by nothing | |
2221 | ;; but a comment line prefix. Remove it | |
2222 | ;; along with surrounding ws. | |
2223 | (setq spaces (- (match-end 1) (match-end 2))) | |
2224 | (goto-char ender-start)) | |
2225 | (skip-chars-backward " \t\r\n") | |
2226 | (if (/= (point) ender-start) | |
2227 | (progn | |
2228 | (if (<= here (point)) | |
2229 | ;; Don't adjust point below if it's | |
2230 | ;; before the string we replace. | |
2231 | (setq point-rel -1)) | |
2232 | ;; Keep one or two spaces between the text and | |
2233 | ;; the ender, depending on how many there are now. | |
2234 | (unless spaces (setq spaces (- ender-start (point)))) | |
2235 | (setq spaces (max (min spaces 2) 1)) | |
2236 | ;; Insert the filler first to keep marks right. | |
2237 | (insert (make-string spaces ?x)) | |
2238 | (delete-region (point) (+ ender-start spaces)) | |
2239 | (setq hang-ender-stuck spaces) | |
2240 | (setq point-rel | |
2241 | (and (>= point-rel 0) | |
2242 | (- (point) (min point-rel spaces))))) | |
2243 | (setq point-rel nil))) | |
2244 | (if point-rel | |
2245 | ;; Point was in the middle of the string we | |
2246 | ;; replaced above, so put it back in the same | |
2247 | ;; relative position, counting from the end. | |
2248 | (goto-char point-rel)) | |
2249 | ))) | |
2250 | (when (<= beg (car lit-limits)) | |
2251 | ;; The region to be filled includes the comment starter. | |
51f606de GM |
2252 | (save-excursion |
2253 | (goto-char (car lit-limits)) | |
130c507e GM |
2254 | (if (looking-at (concat "\\(" comment-start-skip "\\)$")) |
2255 | ;; Begin filling with the next line. | |
2256 | (setq beg (c-point 'bonl)) | |
2257 | ;; Fake the fill prefix in the first line. | |
2258 | (setq tmp-pre t))))) | |
2259 | ((eq lit-type 'string) ; String. | |
2260 | (save-excursion | |
2261 | (when (>= end (cdr lit-limits)) | |
2262 | (goto-char (1- (cdr lit-limits))) | |
2263 | (setq tmp-post (point-marker)) | |
2264 | (insert ?\n) | |
2265 | (set-marker end (point))) | |
2266 | (when (<= beg (car lit-limits)) | |
2267 | (goto-char (1+ (car lit-limits))) | |
2268 | (setq beg (if (looking-at "\\\\$") | |
2269 | ;; Leave the start line if it's | |
2270 | ;; nothing but an escaped newline. | |
2271 | (1+ (match-end 0)) | |
2272 | (point)))))) | |
2273 | (t (setq beg nil))) | |
2274 | (when tmp-pre | |
2275 | ;; Temporarily insert the fill prefix after the comment | |
2276 | ;; starter so that the first line looks like any other | |
2277 | ;; comment line in the narrowed region. | |
2278 | (setq fill (c-guess-fill-prefix lit-limits lit-type)) | |
2279 | (unless (string-match (concat "\\`[ \t]*\\(" | |
2280 | c-current-comment-prefix | |
2281 | "\\)[ \t]*\\'") | |
2282 | (car fill)) | |
2283 | ;; Oops, the prefix doesn't match the comment prefix | |
2284 | ;; regexp. This could produce very confusing | |
2285 | ;; results with adaptive fill packages together with | |
2286 | ;; the insert prefix magic below, since the prefix | |
2287 | ;; often doesn't appear at all. So let's warn about | |
2288 | ;; it. | |
2289 | (message "\ | |
2290 | Warning: Regexp from `c-comment-prefix-regexp' doesn't match the comment prefix %S" | |
2291 | (car fill))) | |
2292 | ;; Find the right spot on the line, break it, insert | |
2293 | ;; the fill prefix and make sure we're back in the | |
2294 | ;; same column by temporarily prefixing the first word | |
2295 | ;; with a number of 'x'. | |
2296 | (save-excursion | |
2297 | (goto-char (car lit-limits)) | |
2298 | (if (looking-at (if (eq lit-type 'c++) | |
fdea67e7 | 2299 | c-current-comment-prefix |
130c507e GM |
2300 | comment-start-skip)) |
2301 | (goto-char (match-end 0)) | |
2302 | (forward-char 2) | |
2303 | (skip-chars-forward " \t")) | |
2304 | (while (< (current-column) (cdr fill)) (forward-char 1)) | |
2305 | (let ((col (current-column))) | |
2306 | (setq beg (1+ (point)) | |
2307 | tmp-pre (list (point))) | |
2308 | (unwind-protect | |
2309 | (progn | |
2310 | (insert ?\n (car fill)) | |
2311 | (insert (make-string (- col (current-column)) ?x))) | |
2312 | (setcdr tmp-pre (point)))))) | |
2313 | (when beg | |
2314 | (let ((fill-paragraph-function | |
2315 | ;; Avoid infinite recursion. | |
2316 | (if (not (eq fill-paragraph-function 'c-fill-paragraph)) | |
2317 | fill-paragraph-function)) | |
2318 | (fill-prefix | |
2319 | (or fill-prefix | |
2320 | ;; Kludge: If the function that adapts the fill prefix | |
2321 | ;; doesn't produce the required comment starter for line | |
2322 | ;; comments, then force it by setting fill-prefix. | |
2323 | (when (and (eq lit-type 'c++) | |
2324 | ;; Kludge the kludge: filladapt-mode doesn't | |
2325 | ;; have this problem, but it doesn't override | |
2326 | ;; fill-context-prefix currently (version | |
2327 | ;; 2.12). | |
2328 | (not (and (boundp 'filladapt-mode) | |
2329 | filladapt-mode)) | |
2330 | (not (string-match | |
2331 | "\\`[ \t]*//" | |
2332 | (or (fill-context-prefix beg end) | |
2333 | "")))) | |
2334 | (car (or fill (c-guess-fill-prefix | |
2335 | lit-limits lit-type)))))) | |
2336 | (point-rel (cond ((< here beg) (- here beg)) | |
2337 | ((> here end) (- here end))))) | |
2338 | ;; Preparations finally done! Now we can call the | |
2339 | ;; real fill function. | |
2340 | (save-restriction | |
2341 | (narrow-to-region beg end) | |
2342 | (fill-paragraph arg)) | |
2343 | (if point-rel | |
2344 | ;; Restore point if it was outside the region. | |
2345 | (if (< point-rel 0) | |
2346 | (goto-char (+ beg point-rel)) | |
2347 | (goto-char (+ end point-rel)))) | |
2348 | ))) | |
2349 | (when (consp tmp-pre) | |
2350 | (delete-region (car tmp-pre) (cdr tmp-pre))) | |
2351 | (when tmp-post | |
2352 | (save-excursion | |
2353 | (goto-char tmp-post) | |
2354 | (delete-char 1)) | |
2355 | (when hang-ender-stuck | |
2356 | ;; Preserve point even if it's in the middle of the string | |
2357 | ;; we replace; save-excursion doesn't work in that case. | |
2358 | (setq here (point)) | |
2359 | (goto-char tmp-post) | |
2360 | (skip-syntax-backward "^w ") | |
2361 | (forward-char (- hang-ender-stuck)) | |
2362 | (insert (make-string hang-ender-stuck ?\ )) | |
2363 | (delete-char hang-ender-stuck) | |
2364 | (goto-char here)) | |
2365 | (set-marker tmp-post nil)) | |
2366 | (set-marker end nil))) | |
51f606de GM |
2367 | ;; Always return t. This has the effect that if filling isn't done |
2368 | ;; above, it isn't done at all, and it's therefore effectively | |
2369 | ;; disabled in normal code. | |
2370 | t) | |
2371 | ||
2372 | (defun c-do-auto-fill () | |
2373 | ;; Do automatic filling if not inside a context where it should be | |
2374 | ;; ignored. | |
2375 | (let ((c-auto-fill-prefix | |
2376 | ;; The decision whether the line should be broken is actually | |
2377 | ;; done in c-indent-new-comment-line, which do-auto-fill | |
2378 | ;; calls to break lines. We just set this special variable | |
2379 | ;; so that we'll know when we're called from there. It's | |
2380 | ;; also used to detect whether fill-prefix is user set or | |
2381 | ;; generated automatically by do-auto-fill. | |
2382 | fill-prefix)) | |
2383 | (do-auto-fill))) | |
2384 | ||
2385 | (defun c-indent-new-comment-line (&optional soft) | |
2386 | "Break line at point and indent, continuing comment if within one. | |
2387 | If inside a comment and `comment-multi-line' is non-nil, the | |
2388 | indentation and line prefix are preserved (see the | |
2389 | `c-comment-prefix-regexp' and `c-block-comment-prefix' variables for | |
b8ded794 GM |
2390 | details). If inside a single line comment and `comment-multi-line' is |
2391 | nil, a new comment of the same type is started on the next line and | |
2392 | indented as appropriate for comments. | |
51f606de GM |
2393 | |
2394 | If a fill prefix is specified, it overrides all the above." | |
2395 | (interactive) | |
2396 | (let ((fill-prefix fill-prefix) | |
2397 | (do-line-break | |
2398 | (lambda () | |
2399 | (delete-region (progn (skip-chars-backward " \t") (point)) | |
2400 | (progn (skip-chars-forward " \t") (point))) | |
2401 | (if soft (insert-and-inherit ?\n) (newline 1)))) | |
2402 | ;; Already know the literal type and limits when called from | |
2403 | ;; c-context-line-break. | |
130c507e GM |
2404 | (c-lit-limits c-lit-limits) |
2405 | (c-lit-type c-lit-type)) | |
2406 | (when (not (eq c-auto-fill-prefix t)) | |
51f606de GM |
2407 | ;; Called from do-auto-fill. |
2408 | (unless c-lit-limits | |
2409 | (setq c-lit-limits (c-literal-limits nil nil t))) | |
2410 | (unless c-lit-type | |
2411 | (setq c-lit-type (c-literal-type c-lit-limits))) | |
2412 | (if (memq (cond ((eq c-lit-type 'pound) | |
2413 | ;; Come to think about it, "pound" is a bit | |
2414 | ;; of a misnomer, so call it "cpp" instead | |
2415 | ;; in user interaction. | |
2416 | 'cpp) | |
2417 | ((null c-lit-type) 'code) | |
2418 | (t c-lit-type)) | |
2419 | c-ignore-auto-fill) | |
2420 | (setq fill-prefix t) ; Used as flag in the cond. | |
b8ded794 GM |
2421 | (if (and (null c-auto-fill-prefix) |
2422 | (eq c-lit-type 'c) | |
2423 | (<= (c-point 'bol) (car c-lit-limits))) | |
2424 | ;; The adaptive fill function has generated a prefix, but | |
2425 | ;; we're on the first line in a block comment so it'll be | |
2426 | ;; wrong. Ignore it to guess a better one below. | |
2427 | (setq fill-prefix nil) | |
2428 | (when (and (eq c-lit-type 'c++) | |
2429 | (not (string-match "\\`[ \t]*//" (or fill-prefix "")))) | |
2430 | ;; Kludge: If the function that adapted the fill prefix | |
2431 | ;; doesn't produce the required comment starter for line | |
2432 | ;; comments, then we ignore it. | |
2433 | (setq fill-prefix nil))) | |
2434 | )) | |
51f606de GM |
2435 | (cond ((eq fill-prefix t) |
2436 | ;; A call from do-auto-fill which should be ignored. | |
2437 | ) | |
2438 | (fill-prefix | |
2439 | ;; A fill-prefix overrides anything. | |
2440 | (funcall do-line-break) | |
2441 | (insert-and-inherit fill-prefix)) | |
2442 | ((progn | |
2443 | (unless c-lit-limits | |
2444 | (setq c-lit-limits (c-literal-limits nil nil t))) | |
2445 | (unless c-lit-type | |
2446 | (setq c-lit-type (c-literal-type c-lit-limits))) | |
2447 | (memq c-lit-type '(c c++))) | |
b8ded794 GM |
2448 | (if (or comment-multi-line |
2449 | (save-excursion | |
2450 | (goto-char (car c-lit-limits)) | |
2451 | (end-of-line) | |
2452 | (< (point) (cdr c-lit-limits)))) | |
51f606de GM |
2453 | ;; Inside a comment that should be continued. |
2454 | (let ((fill (c-guess-fill-prefix | |
2455 | (setq c-lit-limits | |
2456 | (c-collect-line-comments c-lit-limits)) | |
2457 | c-lit-type)) | |
2458 | (pos (point))) | |
2459 | (if (save-excursion | |
2460 | (back-to-indentation) | |
2461 | (> (point) (car c-lit-limits)) | |
130c507e | 2462 | (looking-at c-current-comment-prefix)) |
51f606de GM |
2463 | (progn |
2464 | ;; Skip forward past the fill prefix in case | |
2465 | ;; we're standing in it. | |
2466 | (while (and (< (current-column) (cdr fill)) | |
2467 | (not (eolp))) | |
2468 | (forward-char 1)) | |
2469 | (if (> (point) (if (and (eq c-lit-type 'c) | |
2470 | (save-excursion | |
2471 | (forward-char -2) | |
2472 | (looking-at "\\*/"))) | |
2473 | (- (cdr c-lit-limits) 2) | |
2474 | (cdr c-lit-limits))) | |
2475 | (progn | |
2476 | ;; The skip takes us out of the comment; | |
2477 | ;; insert the fill prefix at bol instead | |
2478 | ;; and keep the position. | |
2479 | (setq pos (copy-marker pos t)) | |
2480 | (beginning-of-line) | |
2481 | (insert-and-inherit (car fill)) | |
2482 | (if soft (insert-and-inherit ?\n) (newline 1)) | |
2483 | (goto-char pos) | |
2484 | (set-marker pos nil)) | |
2485 | (funcall do-line-break) | |
2486 | (insert-and-inherit (car fill)))) | |
2487 | (funcall do-line-break) | |
2488 | (insert-and-inherit (car fill)))) | |
2489 | ;; Inside a comment that should be broken. | |
2490 | (let ((comment-start comment-start) | |
2491 | (comment-end comment-end) | |
2492 | col) | |
2493 | (if (eq c-lit-type 'c) | |
2494 | (unless (string-match "[ \t]*/\\*" comment-start) | |
2495 | (setq comment-start "/* " comment-end " */")) | |
2496 | (unless (string-match "[ \t]*//" comment-start) | |
2497 | (setq comment-start "// " comment-end ""))) | |
2498 | (setq col (save-excursion | |
2499 | (back-to-indentation) | |
2500 | (current-column))) | |
2501 | (funcall do-line-break) | |
2502 | (when (and comment-end (not (equal comment-end ""))) | |
2503 | (forward-char -1) | |
2504 | (insert-and-inherit comment-end) | |
2505 | (forward-char 1)) | |
2506 | ;; c-comment-indent may look at the current | |
2507 | ;; indentation, so let's start out with the same | |
2508 | ;; indentation as the previous one. | |
2509 | (indent-to col) | |
2510 | (insert-and-inherit comment-start) | |
2511 | (indent-for-comment)))) | |
2512 | (t | |
2513 | ;; Somewhere else in the code. | |
2514 | (let ((col (save-excursion | |
2515 | (while (progn (back-to-indentation) | |
2516 | (and (looking-at "^\\s *$") | |
2517 | (= (forward-line -1) 0)))) | |
2518 | (current-column)))) | |
2519 | (funcall do-line-break) | |
2520 | (indent-to col)))))) | |
2521 | ||
2522 | (defalias 'c-comment-line-break-function 'c-indent-new-comment-line) | |
2523 | (make-obsolete 'c-comment-line-break-function 'c-indent-new-comment-line) | |
2524 | ||
2525 | ;; advice for indent-new-comment-line for older Emacsen | |
2526 | (unless (boundp 'comment-line-break-function) | |
130c507e | 2527 | (defvar c-inside-line-break-advice nil) |
51f606de GM |
2528 | (defadvice indent-new-comment-line (around c-line-break-advice |
2529 | activate preactivate) | |
2530 | "Call `c-indent-new-comment-line' if in CC Mode." | |
130c507e | 2531 | (if (or c-inside-line-break-advice |
51f606de GM |
2532 | (not c-buffer-is-cc-mode)) |
2533 | ad-do-it | |
130c507e | 2534 | (let ((c-inside-line-break-advice t)) |
51f606de GM |
2535 | (c-indent-new-comment-line (ad-get-arg 0)))))) |
2536 | ||
2537 | (defun c-context-line-break () | |
2538 | "Do a line break suitable to the context. | |
2539 | ||
2540 | When point is outside a comment, insert a newline and indent according | |
2541 | to the syntactic context. | |
2542 | ||
2543 | When point is inside a comment, continue it with the appropriate | |
2544 | comment prefix (see the `c-comment-prefix-regexp' and | |
2545 | `c-block-comment-prefix' variables for details). The end of a | |
2546 | C++-style line comment doesn't count as inside the comment, though." | |
2547 | (interactive "*") | |
2548 | (let* ((c-lit-limits (c-literal-limits nil nil t)) | |
2549 | (c-lit-type (c-literal-type c-lit-limits))) | |
2550 | (if (or (eq c-lit-type 'c) | |
2551 | (and (eq c-lit-type 'c++) | |
2552 | (< (point) | |
2553 | (1- (cdr (setq c-lit-limits | |
2554 | (c-collect-line-comments c-lit-limits))))))) | |
2555 | (let ((comment-multi-line t) | |
2556 | (fill-prefix nil)) | |
2557 | (c-indent-new-comment-line)) | |
2558 | (delete-region (point) (progn (skip-chars-backward " \t") (point))) | |
2559 | (newline) | |
2560 | ;; c-indent-line may look at the current indentation, so let's | |
2561 | ;; start out with the same indentation as the previous line. | |
2562 | (let ((col (save-excursion | |
2563 | (forward-line -1) | |
2564 | (while (progn (back-to-indentation) | |
2565 | (and (looking-at "^\\s *$") | |
2566 | (= (forward-line -1) 0)))) | |
2567 | (current-column)))) | |
2568 | (indent-to col)) | |
130c507e | 2569 | (indent-according-to-mode)))) |
785eecbb RS |
2570 | |
2571 | \f | |
130c507e | 2572 | (cc-provide 'cc-cmds) |
3afbc435 | 2573 | |
785eecbb | 2574 | ;;; cc-cmds.el ends here |