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c88ab9ce ER |
1 | ;;; simple.el --- basic editing commands for Emacs |
2 | ||
7683b5c2 | 3 | ;; Copyright (C) 1985, 86, 87, 93, 94, 95, 96, 97, 98, 99, 2000 |
69c1dd37 | 4 | ;; Free Software Foundation, Inc. |
2076c87c JB |
5 | |
6 | ;; This file is part of GNU Emacs. | |
7 | ||
8 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
9 | ;; it under the terms of the GNU General Public License as published by | |
3a801d0c | 10 | ;; the Free Software Foundation; either version 2, or (at your option) |
2076c87c JB |
11 | ;; any later version. |
12 | ||
13 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
14 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | ;; GNU General Public License for more details. | |
17 | ||
18 | ;; You should have received a copy of the GNU General Public License | |
b578f267 EN |
19 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
20 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | ;; Boston, MA 02111-1307, USA. | |
2076c87c | 22 | |
d9ecc911 ER |
23 | ;;; Commentary: |
24 | ||
25 | ;; A grab-bag of basic Emacs commands not specifically related to some | |
26 | ;; major mode or to file-handling. | |
27 | ||
3a801d0c | 28 | ;;; Code: |
2076c87c | 29 | |
d01a33cf | 30 | (eval-when-compile |
a339f909 | 31 | (autoload 'widget-convert "wid-edit") |
9023837e | 32 | (autoload 'shell-mode "shell") |
d01a33cf GM |
33 | (require 'cl)) |
34 | ||
35 | ||
69c1dd37 RS |
36 | (defgroup killing nil |
37 | "Killing and yanking commands" | |
38 | :group 'editing) | |
39 | ||
69c1dd37 RS |
40 | (defgroup paren-matching nil |
41 | "Highlight (un)matching of parens and expressions." | |
69c1dd37 RS |
42 | :group 'matching) |
43 | ||
44 | ||
93be67de KH |
45 | (defun fundamental-mode () |
46 | "Major mode not specialized for anything in particular. | |
47 | Other major modes are defined by comparison with this one." | |
48 | (interactive) | |
49 | (kill-all-local-variables)) | |
eaae8106 | 50 | |
93be67de KH |
51 | ;; Making and deleting lines. |
52 | ||
30bb9754 | 53 | (defun newline (&optional arg) |
d133d835 | 54 | "Insert a newline, and move to left margin of the new line if it's blank. |
30bb9754 | 55 | The newline is marked with the text-property `hard'. |
76c64e24 | 56 | With ARG, insert that many newlines. |
30bb9754 BG |
57 | In Auto Fill mode, if no numeric arg, break the preceding line if it's long." |
58 | (interactive "*P") | |
4c4cbf11 | 59 | (barf-if-buffer-read-only) |
30bb9754 BG |
60 | ;; Inserting a newline at the end of a line produces better redisplay in |
61 | ;; try_window_id than inserting at the beginning of a line, and the textual | |
62 | ;; result is the same. So, if we're at beginning of line, pretend to be at | |
63 | ;; the end of the previous line. | |
1e722f9f | 64 | (let ((flag (and (not (bobp)) |
30bb9754 | 65 | (bolp) |
1cd24721 RS |
66 | ;; Make sure no functions want to be told about |
67 | ;; the range of the changes. | |
1cd24721 RS |
68 | (not after-change-functions) |
69 | (not before-change-functions) | |
fd977703 RS |
70 | ;; Make sure there are no markers here. |
71 | (not (buffer-has-markers-at (1- (point)))) | |
2f047f6c | 72 | (not (buffer-has-markers-at (point))) |
1cd24721 RS |
73 | ;; Make sure no text properties want to know |
74 | ;; where the change was. | |
75 | (not (get-char-property (1- (point)) 'modification-hooks)) | |
76 | (not (get-char-property (1- (point)) 'insert-behind-hooks)) | |
77 | (or (eobp) | |
78 | (not (get-char-property (point) 'insert-in-front-hooks))) | |
31a5333f MB |
79 | ;; Make sure the newline before point isn't intangible. |
80 | (not (get-char-property (1- (point)) 'intangible)) | |
81 | ;; Make sure the newline before point isn't read-only. | |
82 | (not (get-char-property (1- (point)) 'read-only)) | |
83 | ;; Make sure the newline before point isn't invisible. | |
84 | (not (get-char-property (1- (point)) 'invisible)) | |
85 | ;; Make sure the newline before point has the same | |
86 | ;; properties as the char before it (if any). | |
1e722f9f | 87 | (< (or (previous-property-change (point)) -2) |
d133d835 RS |
88 | (- (point) 2)))) |
89 | (was-page-start (and (bolp) | |
90 | (looking-at page-delimiter))) | |
91 | (beforepos (point))) | |
30bb9754 BG |
92 | (if flag (backward-char 1)) |
93 | ;; Call self-insert so that auto-fill, abbrev expansion etc. happens. | |
94 | ;; Set last-command-char to tell self-insert what to insert. | |
95 | (let ((last-command-char ?\n) | |
96 | ;; Don't auto-fill if we have a numeric argument. | |
3954fff9 RS |
97 | ;; Also not if flag is true (it would fill wrong line); |
98 | ;; there is no need to since we're at BOL. | |
99 | (auto-fill-function (if (or arg flag) nil auto-fill-function))) | |
4cc9d0dc RS |
100 | (unwind-protect |
101 | (self-insert-command (prefix-numeric-value arg)) | |
102 | ;; If we get an error in self-insert-command, put point at right place. | |
103 | (if flag (forward-char 1)))) | |
2f047f6c KH |
104 | ;; Even if we did *not* get an error, keep that forward-char; |
105 | ;; all further processing should apply to the newline that the user | |
106 | ;; thinks he inserted. | |
107 | ||
30bb9754 BG |
108 | ;; Mark the newline(s) `hard'. |
109 | (if use-hard-newlines | |
2f047f6c | 110 | (set-hard-newline-properties |
55741b46 | 111 | (- (point) (if arg (prefix-numeric-value arg) 1)) (point))) |
d133d835 RS |
112 | ;; If the newline leaves the previous line blank, |
113 | ;; and we have a left margin, delete that from the blank line. | |
114 | (or flag | |
115 | (save-excursion | |
116 | (goto-char beforepos) | |
117 | (beginning-of-line) | |
118 | (and (looking-at "[ \t]$") | |
119 | (> (current-left-margin) 0) | |
120 | (delete-region (point) (progn (end-of-line) (point)))))) | |
d133d835 RS |
121 | ;; Indent the line after the newline, except in one case: |
122 | ;; when we added the newline at the beginning of a line | |
123 | ;; which starts a page. | |
124 | (or was-page-start | |
125 | (move-to-left-margin nil t))) | |
30bb9754 BG |
126 | nil) |
127 | ||
55741b46 RS |
128 | (defun set-hard-newline-properties (from to) |
129 | (let ((sticky (get-text-property from 'rear-nonsticky))) | |
130 | (put-text-property from to 'hard 't) | |
131 | ;; If rear-nonsticky is not "t", add 'hard to rear-nonsticky list | |
132 | (if (and (listp sticky) (not (memq 'hard sticky))) | |
133 | (put-text-property from (point) 'rear-nonsticky | |
134 | (cons 'hard sticky))))) | |
eaae8106 | 135 | |
2076c87c | 136 | (defun open-line (arg) |
ff1fbe3e | 137 | "Insert a newline and leave point before it. |
3db1e3b5 | 138 | If there is a fill prefix and/or a left-margin, insert them on the new line |
d133d835 | 139 | if the line would have been blank. |
616ed245 | 140 | With arg N, insert N newlines." |
2076c87c | 141 | (interactive "*p") |
616ed245 | 142 | (let* ((do-fill-prefix (and fill-prefix (bolp))) |
3db1e3b5 | 143 | (do-left-margin (and (bolp) (> (current-left-margin) 0))) |
28191e20 | 144 | (loc (point))) |
d133d835 RS |
145 | (newline arg) |
146 | (goto-char loc) | |
28191e20 | 147 | (while (> arg 0) |
d133d835 RS |
148 | (cond ((bolp) |
149 | (if do-left-margin (indent-to (current-left-margin))) | |
150 | (if do-fill-prefix (insert-and-inherit fill-prefix)))) | |
151 | (forward-line 1) | |
28191e20 | 152 | (setq arg (1- arg))) |
d133d835 RS |
153 | (goto-char loc) |
154 | (end-of-line))) | |
2076c87c JB |
155 | |
156 | (defun split-line () | |
157 | "Split current line, moving portion beyond point vertically down." | |
158 | (interactive "*") | |
159 | (skip-chars-forward " \t") | |
160 | (let ((col (current-column)) | |
161 | (pos (point))) | |
28191e20 | 162 | (newline 1) |
2076c87c JB |
163 | (indent-to col 0) |
164 | (goto-char pos))) | |
165 | ||
2076c87c JB |
166 | (defun delete-indentation (&optional arg) |
167 | "Join this line to previous and fix up whitespace at join. | |
ccc58657 | 168 | If there is a fill prefix, delete it from the beginning of this line. |
2076c87c JB |
169 | With argument, join this line to following line." |
170 | (interactive "*P") | |
171 | (beginning-of-line) | |
172 | (if arg (forward-line 1)) | |
173 | (if (eq (preceding-char) ?\n) | |
174 | (progn | |
175 | (delete-region (point) (1- (point))) | |
ccc58657 RS |
176 | ;; If the second line started with the fill prefix, |
177 | ;; delete the prefix. | |
178 | (if (and fill-prefix | |
01b8e020 | 179 | (<= (+ (point) (length fill-prefix)) (point-max)) |
ccc58657 RS |
180 | (string= fill-prefix |
181 | (buffer-substring (point) | |
182 | (+ (point) (length fill-prefix))))) | |
183 | (delete-region (point) (+ (point) (length fill-prefix)))) | |
2076c87c JB |
184 | (fixup-whitespace)))) |
185 | ||
fc025090 | 186 | (defalias 'join-line #'delete-indentation) ; easier to find |
eaae8106 | 187 | |
2076c87c JB |
188 | (defun delete-blank-lines () |
189 | "On blank line, delete all surrounding blank lines, leaving just one. | |
190 | On isolated blank line, delete that one. | |
6d30d416 | 191 | On nonblank line, delete any immediately following blank lines." |
2076c87c JB |
192 | (interactive "*") |
193 | (let (thisblank singleblank) | |
194 | (save-excursion | |
195 | (beginning-of-line) | |
196 | (setq thisblank (looking-at "[ \t]*$")) | |
70e14c01 | 197 | ;; Set singleblank if there is just one blank line here. |
2076c87c JB |
198 | (setq singleblank |
199 | (and thisblank | |
200 | (not (looking-at "[ \t]*\n[ \t]*$")) | |
201 | (or (bobp) | |
202 | (progn (forward-line -1) | |
203 | (not (looking-at "[ \t]*$"))))))) | |
70e14c01 | 204 | ;; Delete preceding blank lines, and this one too if it's the only one. |
2076c87c JB |
205 | (if thisblank |
206 | (progn | |
207 | (beginning-of-line) | |
208 | (if singleblank (forward-line 1)) | |
209 | (delete-region (point) | |
210 | (if (re-search-backward "[^ \t\n]" nil t) | |
211 | (progn (forward-line 1) (point)) | |
212 | (point-min))))) | |
70e14c01 JB |
213 | ;; Delete following blank lines, unless the current line is blank |
214 | ;; and there are no following blank lines. | |
2076c87c JB |
215 | (if (not (and thisblank singleblank)) |
216 | (save-excursion | |
217 | (end-of-line) | |
218 | (forward-line 1) | |
219 | (delete-region (point) | |
220 | (if (re-search-forward "[^ \t\n]" nil t) | |
221 | (progn (beginning-of-line) (point)) | |
70e14c01 JB |
222 | (point-max))))) |
223 | ;; Handle the special case where point is followed by newline and eob. | |
224 | ;; Delete the line, leaving point at eob. | |
225 | (if (looking-at "^[ \t]*\n\\'") | |
226 | (delete-region (point) (point-max))))) | |
2076c87c | 227 | |
eaae8106 SS |
228 | (defun delete-trailing-whitespace () |
229 | "Delete all the trailing whitespace across the current buffer. | |
230 | All whitespace after the last non-whitespace character in a line is deleted. | |
231 | This respects narrowing, created by \\[narrow-to-region] and friends." | |
232 | (interactive "*") | |
233 | (save-match-data | |
234 | (save-excursion | |
5c9b3fac | 235 | (let (eol bol) |
eaae8106 | 236 | (goto-char (point-min)) |
5c9b3fac MB |
237 | (while (re-search-forward "\\s-$" nil t) |
238 | (skip-syntax-backward "-" (save-excursion (forward-line 0) (point))) | |
239 | (delete-region (point) (match-end 0))))))) | |
eaae8106 | 240 | |
2076c87c JB |
241 | (defun newline-and-indent () |
242 | "Insert a newline, then indent according to major mode. | |
ff1fbe3e | 243 | Indentation is done using the value of `indent-line-function'. |
2076c87c | 244 | In programming language modes, this is the same as TAB. |
ff1fbe3e | 245 | In some text modes, where TAB inserts a tab, this command indents to the |
eed5698b | 246 | column specified by the function `current-left-margin'." |
2076c87c | 247 | (interactive "*") |
5ff4ba3d | 248 | (delete-horizontal-space t) |
46947372 | 249 | (newline) |
2076c87c JB |
250 | (indent-according-to-mode)) |
251 | ||
252 | (defun reindent-then-newline-and-indent () | |
253 | "Reindent current line, insert newline, then indent the new line. | |
254 | Indentation of both lines is done according to the current major mode, | |
ff1fbe3e | 255 | which means calling the current value of `indent-line-function'. |
2076c87c JB |
256 | In programming language modes, this is the same as TAB. |
257 | In some text modes, where TAB inserts a tab, this indents to the | |
eed5698b | 258 | column specified by the function `current-left-margin'." |
2076c87c JB |
259 | (interactive "*") |
260 | (save-excursion | |
5ff4ba3d | 261 | (delete-horizontal-space t) |
2076c87c | 262 | (indent-according-to-mode)) |
46947372 | 263 | (newline) |
2076c87c | 264 | (indent-according-to-mode)) |
eaae8106 | 265 | |
93be67de KH |
266 | (defun quoted-insert (arg) |
267 | "Read next input character and insert it. | |
268 | This is useful for inserting control characters. | |
2076c87c | 269 | |
93be67de KH |
270 | If the first character you type after this command is an octal digit, |
271 | you should type a sequence of octal digits which specify a character code. | |
272 | Any nondigit terminates the sequence. If the terminator is a RET, | |
273 | it is discarded; any other terminator is used itself as input. | |
274 | The variable `read-quoted-char-radix' specifies the radix for this feature; | |
275 | set it to 10 or 16 to use decimal or hex instead of octal. | |
dff7d67f | 276 | |
93be67de KH |
277 | In overwrite mode, this function inserts the character anyway, and |
278 | does not handle octal digits specially. This means that if you use | |
279 | overwrite as your normal editing mode, you can use this function to | |
280 | insert characters when necessary. | |
dff7d67f | 281 | |
93be67de KH |
282 | In binary overwrite mode, this function does overwrite, and octal |
283 | digits are interpreted as a character code. This is intended to be | |
284 | useful for editing binary files." | |
285 | (interactive "*p") | |
286 | (let ((char (if (or (not overwrite-mode) | |
287 | (eq overwrite-mode 'overwrite-mode-binary)) | |
288 | (read-quoted-char) | |
289 | (read-char)))) | |
290 | ;; Assume character codes 0240 - 0377 stand for characters in some | |
291 | ;; single-byte character set, and convert them to Emacs | |
292 | ;; characters. | |
293 | (if (and enable-multibyte-characters | |
294 | (>= char ?\240) | |
295 | (<= char ?\377)) | |
296 | (setq char (unibyte-char-to-multibyte char))) | |
297 | (if (> arg 0) | |
298 | (if (eq overwrite-mode 'overwrite-mode-binary) | |
299 | (delete-char arg))) | |
300 | (while (> arg 0) | |
301 | (insert-and-inherit char) | |
302 | (setq arg (1- arg))))) | |
eaae8106 | 303 | |
93be67de KH |
304 | (defun forward-to-indentation (arg) |
305 | "Move forward ARG lines and position at first nonblank character." | |
306 | (interactive "p") | |
307 | (forward-line arg) | |
308 | (skip-chars-forward " \t")) | |
cc2b2b6c | 309 | |
93be67de KH |
310 | (defun backward-to-indentation (arg) |
311 | "Move backward ARG lines and position at first nonblank character." | |
312 | (interactive "p") | |
313 | (forward-line (- arg)) | |
314 | (skip-chars-forward " \t")) | |
2076c87c | 315 | |
93be67de KH |
316 | (defun back-to-indentation () |
317 | "Move point to the first non-whitespace character on this line." | |
318 | (interactive) | |
319 | (beginning-of-line 1) | |
320 | (skip-chars-forward " \t")) | |
321 | ||
322 | (defun fixup-whitespace () | |
323 | "Fixup white space between objects around point. | |
324 | Leave one space or none, according to the context." | |
325 | (interactive "*") | |
326 | (save-excursion | |
327 | (delete-horizontal-space) | |
328 | (if (or (looking-at "^\\|\\s)") | |
329 | (save-excursion (forward-char -1) | |
330 | (looking-at "$\\|\\s(\\|\\s'"))) | |
331 | nil | |
332 | (insert ?\ )))) | |
333 | ||
5ff4ba3d MB |
334 | (defun delete-horizontal-space (&optional backward-only) |
335 | "Delete all spaces and tabs around point. | |
336 | If BACKWARD-ONLY is non-nil, only delete spaces before point." | |
93be67de | 337 | (interactive "*") |
5ff4ba3d MB |
338 | (delete-region |
339 | (if backward-only | |
340 | (point) | |
341 | (progn | |
342 | (skip-chars-forward " \t" (field-end)) | |
343 | (point))) | |
344 | (progn | |
345 | (skip-chars-backward " \t" (field-beginning nil t)) | |
346 | (point)))) | |
93be67de KH |
347 | |
348 | (defun just-one-space () | |
349 | "Delete all spaces and tabs around point, leaving one space." | |
350 | (interactive "*") | |
5ff4ba3d | 351 | (skip-chars-backward " \t" (field-beginning)) |
93be67de KH |
352 | (if (= (following-char) ? ) |
353 | (forward-char 1) | |
354 | (insert ? )) | |
5ff4ba3d MB |
355 | (delete-region |
356 | (point) | |
357 | (progn | |
358 | (skip-chars-forward " \t" (field-end nil t)) | |
359 | (point)))) | |
eaae8106 | 360 | |
2076c87c JB |
361 | (defun beginning-of-buffer (&optional arg) |
362 | "Move point to the beginning of the buffer; leave mark at previous position. | |
c66587fe RS |
363 | With arg N, put point N/10 of the way from the beginning. |
364 | ||
365 | If the buffer is narrowed, this command uses the beginning and size | |
366 | of the accessible part of the buffer. | |
ff1fbe3e RS |
367 | |
368 | Don't use this command in Lisp programs! | |
2076c87c JB |
369 | \(goto-char (point-min)) is faster and avoids clobbering the mark." |
370 | (interactive "P") | |
371 | (push-mark) | |
c66587fe RS |
372 | (let ((size (- (point-max) (point-min)))) |
373 | (goto-char (if arg | |
374 | (+ (point-min) | |
375 | (if (> size 10000) | |
376 | ;; Avoid overflow for large buffer sizes! | |
377 | (* (prefix-numeric-value arg) | |
378 | (/ size 10)) | |
379 | (/ (+ 10 (* size (prefix-numeric-value arg))) 10))) | |
380 | (point-min)))) | |
2076c87c JB |
381 | (if arg (forward-line 1))) |
382 | ||
383 | (defun end-of-buffer (&optional arg) | |
384 | "Move point to the end of the buffer; leave mark at previous position. | |
c66587fe RS |
385 | With arg N, put point N/10 of the way from the end. |
386 | ||
387 | If the buffer is narrowed, this command uses the beginning and size | |
388 | of the accessible part of the buffer. | |
ff1fbe3e RS |
389 | |
390 | Don't use this command in Lisp programs! | |
2076c87c JB |
391 | \(goto-char (point-max)) is faster and avoids clobbering the mark." |
392 | (interactive "P") | |
393 | (push-mark) | |
c66587fe RS |
394 | (let ((size (- (point-max) (point-min)))) |
395 | (goto-char (if arg | |
396 | (- (point-max) | |
397 | (if (> size 10000) | |
398 | ;; Avoid overflow for large buffer sizes! | |
399 | (* (prefix-numeric-value arg) | |
400 | (/ size 10)) | |
401 | (/ (* size (prefix-numeric-value arg)) 10))) | |
402 | (point-max)))) | |
3a801d0c ER |
403 | ;; If we went to a place in the middle of the buffer, |
404 | ;; adjust it to the beginning of a line. | |
314808dc GM |
405 | (cond (arg (forward-line 1)) |
406 | ((< (point) (window-end nil t)) | |
407 | ;; If the end of the buffer is not already on the screen, | |
408 | ;; then scroll specially to put it near, but not at, the bottom. | |
409 | (overlay-recenter (point)) | |
410 | (recenter -3)))) | |
2076c87c JB |
411 | |
412 | (defun mark-whole-buffer () | |
70e14c01 JB |
413 | "Put point at beginning and mark at end of buffer. |
414 | You probably should not use this function in Lisp programs; | |
415 | it is usually a mistake for a Lisp function to use any subroutine | |
416 | that uses or sets the mark." | |
2076c87c JB |
417 | (interactive) |
418 | (push-mark (point)) | |
fd0f4056 | 419 | (push-mark (point-max) nil t) |
2076c87c | 420 | (goto-char (point-min))) |
fa65f20b | 421 | |
eaae8106 | 422 | |
93be67de KH |
423 | ;; Counting lines, one way or another. |
424 | ||
425 | (defun goto-line (arg) | |
426 | "Goto line ARG, counting from line 1 at beginning of buffer." | |
427 | (interactive "NGoto line: ") | |
428 | (setq arg (prefix-numeric-value arg)) | |
429 | (save-restriction | |
430 | (widen) | |
431 | (goto-char 1) | |
432 | (if (eq selective-display t) | |
433 | (re-search-forward "[\n\C-m]" nil 'end (1- arg)) | |
434 | (forward-line (1- arg))))) | |
2076c87c JB |
435 | |
436 | (defun count-lines-region (start end) | |
eb8c3be9 | 437 | "Print number of lines and characters in the region." |
2076c87c JB |
438 | (interactive "r") |
439 | (message "Region has %d lines, %d characters" | |
440 | (count-lines start end) (- end start))) | |
441 | ||
442 | (defun what-line () | |
2578be76 | 443 | "Print the current buffer line number and narrowed line number of point." |
2076c87c | 444 | (interactive) |
2578be76 | 445 | (let ((opoint (point)) start) |
2076c87c | 446 | (save-excursion |
2578be76 RS |
447 | (save-restriction |
448 | (goto-char (point-min)) | |
449 | (widen) | |
450 | (beginning-of-line) | |
451 | (setq start (point)) | |
452 | (goto-char opoint) | |
453 | (beginning-of-line) | |
454 | (if (/= start 1) | |
455 | (message "line %d (narrowed line %d)" | |
456 | (1+ (count-lines 1 (point))) | |
457 | (1+ (count-lines start (point)))) | |
458 | (message "Line %d" (1+ (count-lines 1 (point))))))))) | |
459 | ||
2076c87c JB |
460 | (defun count-lines (start end) |
461 | "Return number of lines between START and END. | |
462 | This is usually the number of newlines between them, | |
ff1fbe3e | 463 | but can be one more if START is not equal to END |
2076c87c | 464 | and the greater of them is not at the start of a line." |
e406700d RS |
465 | (save-excursion |
466 | (save-restriction | |
467 | (narrow-to-region start end) | |
468 | (goto-char (point-min)) | |
469 | (if (eq selective-display t) | |
470 | (save-match-data | |
dde92ca6 RS |
471 | (let ((done 0)) |
472 | (while (re-search-forward "[\n\C-m]" nil t 40) | |
473 | (setq done (+ 40 done))) | |
474 | (while (re-search-forward "[\n\C-m]" nil t 1) | |
475 | (setq done (+ 1 done))) | |
043efc41 RS |
476 | (goto-char (point-max)) |
477 | (if (and (/= start end) | |
478 | (not (bolp))) | |
479 | (1+ done) | |
e406700d RS |
480 | done))) |
481 | (- (buffer-size) (forward-line (buffer-size))))))) | |
eaae8106 | 482 | |
d5d99b80 KH |
483 | (defun what-cursor-position (&optional detail) |
484 | "Print info on cursor position (on screen and within buffer). | |
e38dff0c | 485 | Also describe the character after point, and give its character code |
c6fcc518 KH |
486 | in octal, decimal and hex. |
487 | ||
488 | For a non-ASCII multibyte character, also give its encoding in the | |
489 | buffer's selected coding system if the coding system encodes the | |
490 | character safely. If the character is encoded into one byte, that | |
491 | code is shown in hex. If the character is encoded into more than one | |
492 | byte, just \"...\" is shown. | |
e5a902cf | 493 | |
24dad5d5 KH |
494 | In addition, with prefix argument, show details about that character |
495 | in *Help* buffer. See also the command `describe-char-after'." | |
d5d99b80 | 496 | (interactive "P") |
2076c87c JB |
497 | (let* ((char (following-char)) |
498 | (beg (point-min)) | |
499 | (end (point-max)) | |
500 | (pos (point)) | |
501 | (total (buffer-size)) | |
502 | (percent (if (> total 50000) | |
503 | ;; Avoid overflow from multiplying by 100! | |
504 | (/ (+ (/ total 200) (1- pos)) (max (/ total 100) 1)) | |
505 | (/ (+ (/ total 2) (* 100 (1- pos))) (max total 1)))) | |
506 | (hscroll (if (= (window-hscroll) 0) | |
507 | "" | |
508 | (format " Hscroll=%d" (window-hscroll)))) | |
509 | (col (current-column))) | |
510 | (if (= pos end) | |
511 | (if (or (/= beg 1) (/= end (1+ total))) | |
74fd2380 | 512 | (message "point=%d of %d (%d%%) <%d - %d> column %d %s" |
2076c87c | 513 | pos total percent beg end col hscroll) |
74fd2380 | 514 | (message "point=%d of %d (%d%%) column %d %s" |
2076c87c | 515 | pos total percent col hscroll)) |
c6fcc518 KH |
516 | (let ((coding buffer-file-coding-system) |
517 | encoded encoding-msg) | |
518 | (if (or (not coding) | |
519 | (eq (coding-system-type coding) t)) | |
520 | (setq coding default-buffer-file-coding-system)) | |
28fd4883 KH |
521 | (if (not (char-valid-p char)) |
522 | (setq encoding-msg | |
523 | (format "(0%o, %d, 0x%x, invalid)" char char char)) | |
524 | (setq encoded (and (>= char 128) (encode-coding-char char coding))) | |
525 | (setq encoding-msg | |
526 | (if encoded | |
24dad5d5 | 527 | (format "(0%o, %d, 0x%x, file %s)" |
28fd4883 | 528 | char char char |
24dad5d5 | 529 | (if (> (length encoded) 1) |
28fd4883 | 530 | "..." |
24dad5d5 | 531 | (encoded-string-description encoded coding))) |
28fd4883 | 532 | (format "(0%o, %d, 0x%x)" char char char)))) |
e5e89e48 | 533 | (if detail |
24dad5d5 KH |
534 | ;; We show the detailed information about CHAR. |
535 | (describe-char-after (point))) | |
536 | (if (or (/= beg 1) (/= end (1+ total))) | |
537 | (message "Char: %s %s point=%d of %d (%d%%) <%d - %d> column %d %s" | |
e5a902cf KH |
538 | (if (< char 256) |
539 | (single-key-description char) | |
f0d16a7f | 540 | (buffer-substring-no-properties (point) (1+ (point)))) |
24dad5d5 KH |
541 | encoding-msg pos total percent beg end col hscroll) |
542 | (message "Char: %s %s point=%d of %d (%d%%) column %d %s" | |
543 | (if (< char 256) | |
544 | (single-key-description char) | |
545 | (buffer-substring-no-properties (point) (1+ (point)))) | |
546 | encoding-msg pos total percent col hscroll)))))) | |
eaae8106 | 547 | |
76c64e24 SM |
548 | (defvar read-expression-map |
549 | (let ((m (make-sparse-keymap))) | |
550 | (define-key m "\M-\t" 'lisp-complete-symbol) | |
551 | (set-keymap-parent m minibuffer-local-map) | |
552 | m) | |
854c16c5 | 553 | "Minibuffer keymap used for reading Lisp expressions.") |
854c16c5 | 554 | |
8570b0ca RM |
555 | (defvar read-expression-history nil) |
556 | ||
b49df39d RS |
557 | (defcustom eval-expression-print-level 4 |
558 | "*Value to use for `print-level' when printing value in `eval-expression'." | |
559 | :group 'lisp | |
560 | :type 'integer | |
561 | :version "21.1") | |
562 | ||
563 | (defcustom eval-expression-print-length 12 | |
564 | "*Value to use for `print-length' when printing value in `eval-expression'." | |
565 | :group 'lisp | |
56437999 | 566 | :type '(choice (const nil) integer) |
b49df39d RS |
567 | :version "21.1") |
568 | ||
569 | (defcustom eval-expression-debug-on-error t | |
ed8bcabe GM |
570 | "*Non-nil means set `debug-on-error' when evaluating in `eval-expression'. |
571 | If nil, don't change the value of `debug-on-error'." | |
b49df39d RS |
572 | :group 'lisp |
573 | :type 'boolean | |
574 | :version "21.1") | |
575 | ||
8570b0ca | 576 | ;; We define this, rather than making `eval' interactive, |
2076c87c | 577 | ;; for the sake of completion of names like eval-region, eval-current-buffer. |
ecb7ad00 RS |
578 | (defun eval-expression (eval-expression-arg |
579 | &optional eval-expression-insert-value) | |
2076c87c | 580 | "Evaluate EXPRESSION and print value in minibuffer. |
eb57c304 | 581 | Value is also consed on to front of the variable `values'." |
adca5fa6 | 582 | (interactive |
b387ef9a RS |
583 | (list (read-from-minibuffer "Eval: " |
584 | nil read-expression-map t | |
ecb7ad00 RS |
585 | 'read-expression-history) |
586 | current-prefix-arg)) | |
eaae8106 | 587 | |
ed8bcabe GM |
588 | (if (null eval-expression-debug-on-error) |
589 | (setq values (cons (eval eval-expression-arg) values)) | |
590 | (let ((old-value (make-symbol "t")) new-value) | |
591 | ;; Bind debug-on-error to something unique so that we can | |
592 | ;; detect when evaled code changes it. | |
593 | (let ((debug-on-error old-value)) | |
594 | (setq values (cons (eval eval-expression-arg) values)) | |
595 | (setq new-value debug-on-error)) | |
596 | ;; If evaled code has changed the value of debug-on-error, | |
597 | ;; propagate that change to the global binding. | |
598 | (unless (eq old-value new-value) | |
599 | (setq debug-on-error new-value)))) | |
eaae8106 | 600 | |
b49df39d RS |
601 | (let ((print-length eval-expression-print-length) |
602 | (print-level eval-expression-print-level)) | |
603 | (prin1 (car values) | |
604 | (if eval-expression-insert-value (current-buffer) t)))) | |
2076c87c JB |
605 | |
606 | (defun edit-and-eval-command (prompt command) | |
607 | "Prompting with PROMPT, let user edit COMMAND and eval result. | |
608 | COMMAND is a Lisp expression. Let user edit that expression in | |
609 | the minibuffer, then read and evaluate the result." | |
b387ef9a RS |
610 | (let ((command (read-from-minibuffer prompt |
611 | (prin1-to-string command) | |
612 | read-expression-map t | |
613 | '(command-history . 1)))) | |
5d6c83ae | 614 | ;; If command was added to command-history as a string, |
1f238ac2 | 615 | ;; get rid of that. We want only evaluable expressions there. |
5d6c83ae KH |
616 | (if (stringp (car command-history)) |
617 | (setq command-history (cdr command-history))) | |
618 | ||
619 | ;; If command to be redone does not match front of history, | |
620 | ;; add it to the history. | |
621 | (or (equal command (car command-history)) | |
622 | (setq command-history (cons command command-history))) | |
2076c87c JB |
623 | (eval command))) |
624 | ||
ebb61177 | 625 | (defun repeat-complex-command (arg) |
2076c87c JB |
626 | "Edit and re-evaluate last complex command, or ARGth from last. |
627 | A complex command is one which used the minibuffer. | |
628 | The command is placed in the minibuffer as a Lisp form for editing. | |
629 | The result is executed, repeating the command as changed. | |
630 | If the command has been changed or is not the most recent previous command | |
631 | it is added to the front of the command history. | |
eb6e9899 RS |
632 | You can use the minibuffer history commands \\<minibuffer-local-map>\\[next-history-element] and \\[previous-history-element] |
633 | to get different commands to edit and resubmit." | |
2076c87c | 634 | (interactive "p") |
ba343182 | 635 | (let ((elt (nth (1- arg) command-history)) |
2076c87c JB |
636 | newcmd) |
637 | (if elt | |
854c16c5 | 638 | (progn |
eab22e27 | 639 | (setq newcmd |
74ae5fab RS |
640 | (let ((print-level nil) |
641 | (minibuffer-history-position arg) | |
99ea24de | 642 | (minibuffer-history-sexp-flag (1+ (minibuffer-depth)))) |
7908d27c RS |
643 | (read-from-minibuffer |
644 | "Redo: " (prin1-to-string elt) read-expression-map t | |
645 | (cons 'command-history arg)))) | |
eab22e27 | 646 | |
db16f109 | 647 | ;; If command was added to command-history as a string, |
1f238ac2 | 648 | ;; get rid of that. We want only evaluable expressions there. |
db16f109 RS |
649 | (if (stringp (car command-history)) |
650 | (setq command-history (cdr command-history))) | |
651 | ||
652 | ;; If command to be redone does not match front of history, | |
653 | ;; add it to the history. | |
654 | (or (equal newcmd (car command-history)) | |
655 | (setq command-history (cons newcmd command-history))) | |
2076c87c JB |
656 | (eval newcmd)) |
657 | (ding)))) | |
eaae8106 | 658 | |
854c16c5 RS |
659 | (defvar minibuffer-history nil |
660 | "Default minibuffer history list. | |
661 | This is used for all minibuffer input | |
662 | except when an alternate history list is specified.") | |
663 | (defvar minibuffer-history-sexp-flag nil | |
c2d4b6d9 | 664 | "Non-nil when doing history operations on `command-history'. |
854c16c5 | 665 | More generally, indicates that the history list being acted on |
99ea24de KH |
666 | contains expressions rather than strings. |
667 | It is only valid if its value equals the current minibuffer depth, | |
668 | to handle recursive uses of the minibuffer.") | |
e91f80c4 RS |
669 | (setq minibuffer-history-variable 'minibuffer-history) |
670 | (setq minibuffer-history-position nil) | |
854c16c5 | 671 | (defvar minibuffer-history-search-history nil) |
e91f80c4 | 672 | |
29929437 | 673 | (mapcar |
d0678801 RM |
674 | (lambda (key-and-command) |
675 | (mapcar | |
676 | (lambda (keymap-and-completionp) | |
677 | ;; Arg is (KEYMAP-SYMBOL . COMPLETION-MAP-P). | |
678 | ;; If the cdr of KEY-AND-COMMAND (the command) is a cons, | |
679 | ;; its car is used if COMPLETION-MAP-P is nil, its cdr if it is t. | |
680 | (define-key (symbol-value (car keymap-and-completionp)) | |
681 | (car key-and-command) | |
682 | (let ((command (cdr key-and-command))) | |
683 | (if (consp command) | |
b5e6f936 RM |
684 | ;; (and ... nil) => ... turns back on the completion-oriented |
685 | ;; history commands which rms turned off since they seem to | |
686 | ;; do things he doesn't like. | |
687 | (if (and (cdr keymap-and-completionp) nil) ;XXX turned off | |
d81362b0 | 688 | (progn (error "EMACS BUG!") (cdr command)) |
d0678801 RM |
689 | (car command)) |
690 | command)))) | |
691 | '((minibuffer-local-map . nil) | |
692 | (minibuffer-local-ns-map . nil) | |
693 | (minibuffer-local-completion-map . t) | |
694 | (minibuffer-local-must-match-map . t) | |
695 | (read-expression-map . nil)))) | |
d81362b0 RM |
696 | '(("\en" . (next-history-element . next-complete-history-element)) |
697 | ([next] . (next-history-element . next-complete-history-element)) | |
698 | ("\ep" . (previous-history-element . previous-complete-history-element)) | |
699 | ([prior] . (previous-history-element . previous-complete-history-element)) | |
29929437 JB |
700 | ("\er" . previous-matching-history-element) |
701 | ("\es" . next-matching-history-element))) | |
e91f80c4 | 702 | |
93cee14b RS |
703 | (defvar minibuffer-text-before-history nil |
704 | "Text that was in this minibuffer before any history commands. | |
705 | This is nil if there have not yet been any history commands | |
706 | in this use of the minibuffer.") | |
707 | ||
708 | (add-hook 'minibuffer-setup-hook 'minibuffer-history-initialize) | |
709 | ||
710 | (defun minibuffer-history-initialize () | |
711 | (setq minibuffer-text-before-history nil)) | |
712 | ||
6e7d0ff7 MB |
713 | (defun minibuffer-avoid-prompt (new old) |
714 | "A point-motion hook for the minibuffer, that moves point out of the prompt." | |
715 | (constrain-to-field nil (point-max))) | |
716 | ||
6e30a99a RS |
717 | (defcustom minibuffer-history-case-insensitive-variables nil |
718 | "*Minibuffer history variables for which matching should ignore case. | |
719 | If a history variable is a member of this list, then the | |
720 | \\[previous-matching-history-element] and \\[next-matching-history-element]\ | |
721 | commands ignore case when searching it, regardless of `case-fold-search'." | |
722 | :type '(repeat variable) | |
723 | :group 'minibuffer) | |
724 | ||
e91f80c4 | 725 | (defun previous-matching-history-element (regexp n) |
854c16c5 RS |
726 | "Find the previous history element that matches REGEXP. |
727 | \(Previous history elements refer to earlier actions.) | |
728 | With prefix argument N, search for Nth previous match. | |
5c2010f0 | 729 | If N is negative, find the next or Nth next match. |
6e30a99a RS |
730 | An uppercase letter in REGEXP makes the search case-sensitive. |
731 | See also `minibuffer-history-case-insensitive-variables'." | |
854c16c5 | 732 | (interactive |
c1172a19 | 733 | (let* ((enable-recursive-minibuffers t) |
c1172a19 RS |
734 | (regexp (read-from-minibuffer "Previous element matching (regexp): " |
735 | nil | |
736 | minibuffer-local-map | |
737 | nil | |
738 | 'minibuffer-history-search-history))) | |
739 | ;; Use the last regexp specified, by default, if input is empty. | |
740 | (list (if (string= regexp "") | |
a8e96cea KH |
741 | (if minibuffer-history-search-history |
742 | (car minibuffer-history-search-history) | |
743 | (error "No previous history search regexp")) | |
c1172a19 | 744 | regexp) |
854c16c5 | 745 | (prefix-numeric-value current-prefix-arg)))) |
e276a14a MB |
746 | (unless (zerop n) |
747 | (if (and (zerop minibuffer-history-position) | |
748 | (null minibuffer-text-before-history)) | |
749 | (setq minibuffer-text-before-history (field-string (point-max)))) | |
750 | (let ((history (symbol-value minibuffer-history-variable)) | |
751 | (case-fold-search | |
752 | (if (isearch-no-upper-case-p regexp t) ; assume isearch.el is dumped | |
753 | ;; On some systems, ignore case for file names. | |
754 | (if (memq minibuffer-history-variable | |
755 | minibuffer-history-case-insensitive-variables) | |
756 | t | |
757 | ;; Respect the user's setting for case-fold-search: | |
758 | case-fold-search) | |
759 | nil)) | |
760 | prevpos | |
761 | match-string | |
762 | match-offset | |
763 | (pos minibuffer-history-position)) | |
764 | (while (/= n 0) | |
765 | (setq prevpos pos) | |
766 | (setq pos (min (max 1 (+ pos (if (< n 0) -1 1))) (length history))) | |
767 | (when (= pos prevpos) | |
e91f80c4 | 768 | (error (if (= pos 1) |
ccc58657 RS |
769 | "No later matching history item" |
770 | "No earlier matching history item"))) | |
e276a14a MB |
771 | (setq match-string |
772 | (if (eq minibuffer-history-sexp-flag (minibuffer-depth)) | |
7908d27c | 773 | (let ((print-level nil)) |
e276a14a MB |
774 | (prin1-to-string (nth (1- pos) history))) |
775 | (nth (1- pos) history))) | |
776 | (setq match-offset | |
777 | (if (< n 0) | |
778 | (and (string-match regexp match-string) | |
779 | (match-end 0)) | |
780 | (and (string-match (concat ".*\\(" regexp "\\)") match-string) | |
781 | (match-beginning 1)))) | |
782 | (when match-offset | |
783 | (setq n (+ n (if (< n 0) 1 -1))))) | |
784 | (setq minibuffer-history-position pos) | |
785 | (goto-char (point-max)) | |
786 | (delete-field) | |
787 | (insert match-string) | |
788 | (goto-char (+ (field-beginning) match-offset)))) | |
854c16c5 RS |
789 | (if (or (eq (car (car command-history)) 'previous-matching-history-element) |
790 | (eq (car (car command-history)) 'next-matching-history-element)) | |
791 | (setq command-history (cdr command-history)))) | |
e91f80c4 | 792 | |
e91f80c4 | 793 | (defun next-matching-history-element (regexp n) |
854c16c5 RS |
794 | "Find the next history element that matches REGEXP. |
795 | \(The next history element refers to a more recent action.) | |
796 | With prefix argument N, search for Nth next match. | |
5c2010f0 RS |
797 | If N is negative, find the previous or Nth previous match. |
798 | An uppercase letter in REGEXP makes the search case-sensitive." | |
854c16c5 | 799 | (interactive |
c1172a19 | 800 | (let* ((enable-recursive-minibuffers t) |
c1172a19 RS |
801 | (regexp (read-from-minibuffer "Next element matching (regexp): " |
802 | nil | |
803 | minibuffer-local-map | |
804 | nil | |
805 | 'minibuffer-history-search-history))) | |
806 | ;; Use the last regexp specified, by default, if input is empty. | |
807 | (list (if (string= regexp "") | |
808 | (setcar minibuffer-history-search-history | |
809 | (nth 1 minibuffer-history-search-history)) | |
810 | regexp) | |
854c16c5 | 811 | (prefix-numeric-value current-prefix-arg)))) |
e91f80c4 | 812 | (previous-matching-history-element regexp (- n))) |
2076c87c | 813 | |
8dc3ba7d MB |
814 | (defvar minibuffer-temporary-goal-position nil) |
815 | ||
ebb61177 RS |
816 | (defun next-history-element (n) |
817 | "Insert the next element of the minibuffer history into the minibuffer." | |
2076c87c | 818 | (interactive "p") |
0818b15e | 819 | (or (zerop n) |
93cee14b RS |
820 | (let ((narg (- minibuffer-history-position n)) |
821 | (minimum (if minibuffer-default -1 0)) | |
068c712c | 822 | elt minibuffer-returned-to-present) |
93cee14b RS |
823 | (if (and (zerop minibuffer-history-position) |
824 | (null minibuffer-text-before-history)) | |
a4d1159b | 825 | (setq minibuffer-text-before-history (field-string (point-max)))) |
93cee14b | 826 | (if (< narg minimum) |
81091543 RS |
827 | (if minibuffer-default |
828 | (error "End of history; no next item") | |
829 | (error "End of history; no default available"))) | |
93cee14b RS |
830 | (if (> narg (length (symbol-value minibuffer-history-variable))) |
831 | (error "Beginning of history; no preceding item")) | |
8dc3ba7d MB |
832 | (unless (or (eq last-command 'next-history-element) |
833 | (eq last-command 'previous-history-element)) | |
834 | (let ((prompt-end (field-beginning (point-max)))) | |
835 | (set (make-local-variable 'minibuffer-temporary-goal-position) | |
836 | (cond ((<= (point) prompt-end) prompt-end) | |
837 | ((eobp) nil) | |
838 | (t (point)))))) | |
a4d1159b | 839 | (goto-char (point-max)) |
12de1411 | 840 | (delete-field) |
93cee14b RS |
841 | (setq minibuffer-history-position narg) |
842 | (cond ((= narg -1) | |
843 | (setq elt minibuffer-default)) | |
844 | ((= narg 0) | |
54c548db | 845 | (setq elt (or minibuffer-text-before-history "")) |
068c712c | 846 | (setq minibuffer-returned-to-present t) |
93cee14b RS |
847 | (setq minibuffer-text-before-history nil)) |
848 | (t (setq elt (nth (1- minibuffer-history-position) | |
849 | (symbol-value minibuffer-history-variable))))) | |
850 | (insert | |
068c712c KH |
851 | (if (and (eq minibuffer-history-sexp-flag (minibuffer-depth)) |
852 | (not minibuffer-returned-to-present)) | |
93cee14b RS |
853 | (let ((print-level nil)) |
854 | (prin1-to-string elt)) | |
855 | elt)) | |
8dc3ba7d | 856 | (goto-char (or minibuffer-temporary-goal-position (point-max)))))) |
2076c87c | 857 | |
ebb61177 | 858 | (defun previous-history-element (n) |
3ee3a076 | 859 | "Inserts the previous element of the minibuffer history into the minibuffer." |
2076c87c | 860 | (interactive "p") |
2c5e21c1 | 861 | (next-history-element (- n))) |
d0678801 RM |
862 | |
863 | (defun next-complete-history-element (n) | |
a4d1159b GM |
864 | "Get next history element which completes the minibuffer before the point. |
865 | The contents of the minibuffer after the point are deleted, and replaced | |
866 | by the new completion." | |
d0678801 | 867 | (interactive "p") |
b5e6f936 RM |
868 | (let ((point-at-start (point))) |
869 | (next-matching-history-element | |
a4d1159b GM |
870 | (concat |
871 | "^" (regexp-quote (buffer-substring (field-beginning) (point)))) | |
872 | n) | |
b5e6f936 RM |
873 | ;; next-matching-history-element always puts us at (point-min). |
874 | ;; Move to the position we were at before changing the buffer contents. | |
875 | ;; This is still sensical, because the text before point has not changed. | |
876 | (goto-char point-at-start))) | |
d0678801 RM |
877 | |
878 | (defun previous-complete-history-element (n) | |
1f6fcec3 | 879 | "\ |
a4d1159b GM |
880 | Get previous history element which completes the minibuffer before the point. |
881 | The contents of the minibuffer after the point are deleted, and replaced | |
882 | by the new completion." | |
d0678801 RM |
883 | (interactive "p") |
884 | (next-complete-history-element (- n))) | |
a4d1159b GM |
885 | |
886 | ;; These two functions are for compatibility with the old subrs of the | |
887 | ;; same name. | |
888 | ||
889 | (defun minibuffer-prompt-width () | |
890 | "Return the display width of the minibuffer prompt. | |
891 | Return 0 if current buffer is not a mini-buffer." | |
892 | ;; Return the width of everything before the field at the end of | |
893 | ;; the buffer; this should be 0 for normal buffers. | |
894 | (1- (field-beginning (point-max)))) | |
895 | ||
896 | (defun minibuffer-prompt-end () | |
897 | "Return the buffer position of the end of the minibuffer prompt. | |
b90d06b0 | 898 | Return (point-min) if current buffer is not a mini-buffer." |
bf2083f9 GM |
899 | (field-beginning (point-max))) |
900 | ||
b90d06b0 MB |
901 | (defun minibuffer-contents () |
902 | "Return the user input in a minbuffer as a string. | |
903 | The current buffer must be a minibuffer." | |
904 | (field-string (point-max))) | |
905 | ||
906 | (defun minibuffer-contents-no-properties () | |
907 | "Return the user input in a minbuffer as a string, without text-properties. | |
908 | The current buffer must be a minibuffer." | |
909 | (field-string-no-properties (point-max))) | |
910 | ||
911 | (defun delete-minibuffer-contents () | |
912 | "Delete all user input in a minibuffer. | |
913 | The current buffer must be a minibuffer." | |
914 | (delete-field (point-max))) | |
eaae8106 | 915 | |
2076c87c | 916 | ;Put this on C-x u, so we can force that rather than C-_ into startup msg |
e462e42f | 917 | (defalias 'advertised-undo 'undo) |
2076c87c JB |
918 | |
919 | (defun undo (&optional arg) | |
920 | "Undo some previous changes. | |
921 | Repeat this command to undo more changes. | |
65627aad RS |
922 | A numeric argument serves as a repeat count. |
923 | ||
3c1b77ca MB |
924 | In Transient Mark mode when the mark is active, only undo changes within |
925 | the current region. Similarly, when not in Transient Mark mode, just C-u | |
926 | as an argument limits undo to changes within the current region." | |
65627aad | 927 | (interactive "*P") |
456c617c RS |
928 | ;; If we don't get all the way thru, make last-command indicate that |
929 | ;; for the following command. | |
930 | (setq this-command t) | |
b553cffa RS |
931 | (let ((modified (buffer-modified-p)) |
932 | (recent-save (recent-auto-save-p))) | |
71e40adf JB |
933 | (or (eq (selected-window) (minibuffer-window)) |
934 | (message "Undo!")) | |
3c1b77ca MB |
935 | (unless (eq last-command 'undo) |
936 | (if (if transient-mark-mode mark-active (and arg (not (numberp arg)))) | |
937 | (undo-start (region-beginning) (region-end)) | |
938 | (undo-start)) | |
939 | ;; get rid of initial undo boundary | |
940 | (undo-more 1)) | |
941 | (undo-more | |
942 | (if (or transient-mark-mode (numberp arg)) | |
943 | (prefix-numeric-value arg) | |
944 | 1)) | |
2512c9f0 RS |
945 | ;; Don't specify a position in the undo record for the undo command. |
946 | ;; Instead, undoing this should move point to where the change is. | |
947 | (let ((tail buffer-undo-list) | |
948 | done) | |
949 | (while (and tail (not done) (not (null (car tail)))) | |
950 | (if (integerp (car tail)) | |
951 | (progn | |
952 | (setq done t) | |
953 | (setq buffer-undo-list (delq (car tail) buffer-undo-list)))) | |
954 | (setq tail (cdr tail)))) | |
2076c87c | 955 | (and modified (not (buffer-modified-p)) |
456c617c RS |
956 | (delete-auto-save-file-if-necessary recent-save))) |
957 | ;; If we do get all the way thru, make this-command indicate that. | |
958 | (setq this-command 'undo)) | |
2076c87c | 959 | |
278b0a58 RS |
960 | (defvar pending-undo-list nil |
961 | "Within a run of consecutive undo commands, list remaining to be undone.") | |
962 | ||
52d1110d RS |
963 | (defvar undo-in-progress nil |
964 | "Non-nil while performing an undo. | |
965 | Some change-hooks test this variable to do something different.") | |
966 | ||
2076c87c JB |
967 | (defun undo-more (count) |
968 | "Undo back N undo-boundaries beyond what was already undone recently. | |
ff1fbe3e RS |
969 | Call `undo-start' to get ready to undo recent changes, |
970 | then call `undo-more' one or more times to undo them." | |
2076c87c JB |
971 | (or pending-undo-list |
972 | (error "No further undo information")) | |
52d1110d RS |
973 | (let ((undo-in-progress t)) |
974 | (setq pending-undo-list (primitive-undo count pending-undo-list)))) | |
2076c87c | 975 | |
65627aad RS |
976 | ;; Deep copy of a list |
977 | (defun undo-copy-list (list) | |
978 | "Make a copy of undo list LIST." | |
979 | (mapcar 'undo-copy-list-1 list)) | |
980 | ||
981 | (defun undo-copy-list-1 (elt) | |
982 | (if (consp elt) | |
983 | (cons (car elt) (undo-copy-list-1 (cdr elt))) | |
984 | elt)) | |
985 | ||
986 | (defun undo-start (&optional beg end) | |
987 | "Set `pending-undo-list' to the front of the undo list. | |
988 | The next call to `undo-more' will undo the most recently made change. | |
989 | If BEG and END are specified, then only undo elements | |
990 | that apply to text between BEG and END are used; other undo elements | |
991 | are ignored. If BEG and END are nil, all undo elements are used." | |
992 | (if (eq buffer-undo-list t) | |
993 | (error "No undo information in this buffer")) | |
1e722f9f | 994 | (setq pending-undo-list |
65627aad RS |
995 | (if (and beg end (not (= beg end))) |
996 | (undo-make-selective-list (min beg end) (max beg end)) | |
997 | buffer-undo-list))) | |
998 | ||
999 | (defvar undo-adjusted-markers) | |
1000 | ||
1001 | (defun undo-make-selective-list (start end) | |
1002 | "Return a list of undo elements for the region START to END. | |
1003 | The elements come from `buffer-undo-list', but we keep only | |
1004 | the elements inside this region, and discard those outside this region. | |
1005 | If we find an element that crosses an edge of this region, | |
1006 | we stop and ignore all further elements." | |
1007 | (let ((undo-list-copy (undo-copy-list buffer-undo-list)) | |
1008 | (undo-list (list nil)) | |
1009 | undo-adjusted-markers | |
1010 | some-rejected | |
1011 | undo-elt undo-elt temp-undo-list delta) | |
1012 | (while undo-list-copy | |
1013 | (setq undo-elt (car undo-list-copy)) | |
1014 | (let ((keep-this | |
1015 | (cond ((and (consp undo-elt) (eq (car undo-elt) t)) | |
1016 | ;; This is a "was unmodified" element. | |
1017 | ;; Keep it if we have kept everything thus far. | |
1018 | (not some-rejected)) | |
1019 | (t | |
1020 | (undo-elt-in-region undo-elt start end))))) | |
1021 | (if keep-this | |
1022 | (progn | |
1023 | (setq end (+ end (cdr (undo-delta undo-elt)))) | |
1024 | ;; Don't put two nils together in the list | |
1025 | (if (not (and (eq (car undo-list) nil) | |
1026 | (eq undo-elt nil))) | |
1027 | (setq undo-list (cons undo-elt undo-list)))) | |
1028 | (if (undo-elt-crosses-region undo-elt start end) | |
1029 | (setq undo-list-copy nil) | |
1030 | (setq some-rejected t) | |
1031 | (setq temp-undo-list (cdr undo-list-copy)) | |
1032 | (setq delta (undo-delta undo-elt)) | |
1033 | ||
1034 | (when (/= (cdr delta) 0) | |
1035 | (let ((position (car delta)) | |
1036 | (offset (cdr delta))) | |
1037 | ||
1038 | ;; Loop down the earlier events adjusting their buffer positions | |
1039 | ;; to reflect the fact that a change to the buffer isn't being | |
1040 | ;; undone. We only need to process those element types which | |
1041 | ;; undo-elt-in-region will return as being in the region since | |
1042 | ;; only those types can ever get into the output | |
1043 | ||
1044 | (while temp-undo-list | |
1045 | (setq undo-elt (car temp-undo-list)) | |
1046 | (cond ((integerp undo-elt) | |
1047 | (if (>= undo-elt position) | |
1048 | (setcar temp-undo-list (- undo-elt offset)))) | |
1049 | ((atom undo-elt) nil) | |
1050 | ((stringp (car undo-elt)) | |
1051 | ;; (TEXT . POSITION) | |
1052 | (let ((text-pos (abs (cdr undo-elt))) | |
1053 | (point-at-end (< (cdr undo-elt) 0 ))) | |
1054 | (if (>= text-pos position) | |
1e722f9f | 1055 | (setcdr undo-elt (* (if point-at-end -1 1) |
65627aad RS |
1056 | (- text-pos offset)))))) |
1057 | ((integerp (car undo-elt)) | |
1058 | ;; (BEGIN . END) | |
1059 | (when (>= (car undo-elt) position) | |
1060 | (setcar undo-elt (- (car undo-elt) offset)) | |
1061 | (setcdr undo-elt (- (cdr undo-elt) offset)))) | |
1062 | ((null (car undo-elt)) | |
1063 | ;; (nil PROPERTY VALUE BEG . END) | |
1064 | (let ((tail (nthcdr 3 undo-elt))) | |
1065 | (when (>= (car tail) position) | |
1066 | (setcar tail (- (car tail) offset)) | |
1067 | (setcdr tail (- (cdr tail) offset)))))) | |
1068 | (setq temp-undo-list (cdr temp-undo-list)))))))) | |
1069 | (setq undo-list-copy (cdr undo-list-copy))) | |
1070 | (nreverse undo-list))) | |
1071 | ||
1072 | (defun undo-elt-in-region (undo-elt start end) | |
1073 | "Determine whether UNDO-ELT falls inside the region START ... END. | |
1074 | If it crosses the edge, we return nil." | |
1075 | (cond ((integerp undo-elt) | |
1076 | (and (>= undo-elt start) | |
1077 | (< undo-elt end))) | |
1078 | ((eq undo-elt nil) | |
1079 | t) | |
1080 | ((atom undo-elt) | |
1081 | nil) | |
1082 | ((stringp (car undo-elt)) | |
1083 | ;; (TEXT . POSITION) | |
1084 | (and (>= (abs (cdr undo-elt)) start) | |
1085 | (< (abs (cdr undo-elt)) end))) | |
1086 | ((and (consp undo-elt) (markerp (car undo-elt))) | |
1087 | ;; This is a marker-adjustment element (MARKER . ADJUSTMENT). | |
1088 | ;; See if MARKER is inside the region. | |
1089 | (let ((alist-elt (assq (car undo-elt) undo-adjusted-markers))) | |
1090 | (unless alist-elt | |
1091 | (setq alist-elt (cons (car undo-elt) | |
1092 | (marker-position (car undo-elt)))) | |
1093 | (setq undo-adjusted-markers | |
1094 | (cons alist-elt undo-adjusted-markers))) | |
1095 | (and (cdr alist-elt) | |
1096 | (>= (cdr alist-elt) start) | |
1097 | (< (cdr alist-elt) end)))) | |
1098 | ((null (car undo-elt)) | |
1099 | ;; (nil PROPERTY VALUE BEG . END) | |
1100 | (let ((tail (nthcdr 3 undo-elt))) | |
1101 | (and (>= (car tail) start) | |
1102 | (< (cdr tail) end)))) | |
1103 | ((integerp (car undo-elt)) | |
1104 | ;; (BEGIN . END) | |
1105 | (and (>= (car undo-elt) start) | |
1106 | (< (cdr undo-elt) end))))) | |
1107 | ||
1108 | (defun undo-elt-crosses-region (undo-elt start end) | |
1109 | "Test whether UNDO-ELT crosses one edge of that region START ... END. | |
1110 | This assumes we have already decided that UNDO-ELT | |
1111 | is not *inside* the region START...END." | |
1112 | (cond ((atom undo-elt) nil) | |
1113 | ((null (car undo-elt)) | |
1114 | ;; (nil PROPERTY VALUE BEG . END) | |
1115 | (let ((tail (nthcdr 3 undo-elt))) | |
1116 | (not (or (< (car tail) end) | |
1117 | (> (cdr tail) start))))) | |
1118 | ((integerp (car undo-elt)) | |
1119 | ;; (BEGIN . END) | |
1120 | (not (or (< (car undo-elt) end) | |
1121 | (> (cdr undo-elt) start)))))) | |
1122 | ||
1123 | ;; Return the first affected buffer position and the delta for an undo element | |
1124 | ;; delta is defined as the change in subsequent buffer positions if we *did* | |
1125 | ;; the undo. | |
1126 | (defun undo-delta (undo-elt) | |
1127 | (if (consp undo-elt) | |
1128 | (cond ((stringp (car undo-elt)) | |
1129 | ;; (TEXT . POSITION) | |
1130 | (cons (abs (cdr undo-elt)) (length (car undo-elt)))) | |
1131 | ((integerp (car undo-elt)) | |
1132 | ;; (BEGIN . END) | |
1133 | (cons (car undo-elt) (- (car undo-elt) (cdr undo-elt)))) | |
1134 | (t | |
1135 | '(0 . 0))) | |
1136 | '(0 . 0))) | |
eaae8106 | 1137 | |
009ef402 RS |
1138 | (defvar shell-command-history nil |
1139 | "History list for some commands that read shell commands.") | |
1140 | ||
59fc41e5 RS |
1141 | (defvar shell-command-switch "-c" |
1142 | "Switch used to have the shell execute its command line argument.") | |
1143 | ||
cc039f78 KH |
1144 | (defvar shell-command-default-error-buffer nil |
1145 | "*Buffer name for `shell-command' and `shell-command-on-region' error output. | |
1146 | This buffer is used when `shell-command' or 'shell-command-on-region' | |
1147 | is run interactively. A value of nil means that output to stderr and | |
1148 | stdout will be intermixed in the output stream.") | |
1149 | ||
1150 | (defun shell-command (command &optional output-buffer error-buffer) | |
2076c87c | 1151 | "Execute string COMMAND in inferior shell; display output, if any. |
0b3f96d4 | 1152 | With prefix argument, insert the COMMAND's output at point. |
d382f610 | 1153 | |
2076c87c | 1154 | If COMMAND ends in ampersand, execute it asynchronously. |
d382f610 | 1155 | The output appears in the buffer `*Async Shell Command*'. |
bcad4985 | 1156 | That buffer is in shell mode. |
d382f610 | 1157 | |
939ac10c GM |
1158 | Otherwise, COMMAND is executed synchronously. The output appears in |
1159 | the buffer `*Shell Command Output*'. If the output is short enough to | |
1160 | display in the echo area (which is determined by the variables | |
1161 | `resize-mini-windows' and `max-mini-window-height'), it is shown | |
1162 | there, but it is nonetheless available in buffer `*Shell Command | |
1163 | Output*' even though that buffer is not automatically displayed. If | |
1164 | there is no output, or if output is inserted in the current buffer, | |
1165 | then `*Shell Command Output*' is deleted. | |
d0d74413 | 1166 | |
07f458c1 RS |
1167 | To specify a coding system for converting non-ASCII characters |
1168 | in the shell command output, use \\[universal-coding-system-argument] | |
1169 | before this command. | |
1170 | ||
1171 | Noninteractive callers can specify coding systems by binding | |
1172 | `coding-system-for-read' and `coding-system-for-write'. | |
1173 | ||
d0d74413 RS |
1174 | The optional second argument OUTPUT-BUFFER, if non-nil, |
1175 | says to put the output in some other buffer. | |
1176 | If OUTPUT-BUFFER is a buffer or buffer name, put the output there. | |
1177 | If OUTPUT-BUFFER is not a buffer and not nil, | |
1178 | insert output in current buffer. (This cannot be done asynchronously.) | |
cc039f78 KH |
1179 | In either case, the output is inserted after point (leaving mark after it). |
1180 | ||
1181 | If the optional third argument ERROR-BUFFER is non-nil, it is a buffer | |
1182 | or buffer name to which to direct the command's standard error output. | |
1183 | If it is nil, error output is mingled with regular output. | |
1184 | In an interactive call, the variable `shell-command-default-error-buffer' | |
1185 | specifies the value of ERROR-BUFFER." | |
1186 | ||
aa00b92d RS |
1187 | (interactive (list (read-from-minibuffer "Shell command: " |
1188 | nil nil nil 'shell-command-history) | |
cc039f78 KH |
1189 | current-prefix-arg |
1190 | shell-command-default-error-buffer)) | |
c7edd03c KH |
1191 | ;; Look for a handler in case default-directory is a remote file name. |
1192 | (let ((handler | |
1193 | (find-file-name-handler (directory-file-name default-directory) | |
1194 | 'shell-command))) | |
1195 | (if handler | |
cc039f78 | 1196 | (funcall handler 'shell-command command output-buffer error-buffer) |
c7edd03c KH |
1197 | (if (and output-buffer |
1198 | (not (or (bufferp output-buffer) (stringp output-buffer)))) | |
cc039f78 | 1199 | (let ((error-file |
1e722f9f | 1200 | (if error-buffer |
b005abd5 | 1201 | (make-temp-file |
171a45d9 EZ |
1202 | (expand-file-name "scor" |
1203 | (or small-temporary-file-directory | |
1204 | temporary-file-directory))) | |
cc039f78 KH |
1205 | nil))) |
1206 | (barf-if-buffer-read-only) | |
63437623 | 1207 | (push-mark nil t) |
cc039f78 KH |
1208 | ;; We do not use -f for csh; we will not support broken use of |
1209 | ;; .cshrcs. Even the BSD csh manual says to use | |
1210 | ;; "if ($?prompt) exit" before things which are not useful | |
1211 | ;; non-interactively. Besides, if someone wants their other | |
1212 | ;; aliases for shell commands then they can still have them. | |
1e722f9f | 1213 | (call-process shell-file-name nil |
cc039f78 KH |
1214 | (if error-file |
1215 | (list t error-file) | |
1216 | t) | |
1217 | nil shell-command-switch command) | |
1218 | (when (and error-file (file-exists-p error-file)) | |
1219 | (if (< 0 (nth 7 (file-attributes error-file))) | |
1220 | (with-current-buffer (get-buffer-create error-buffer) | |
1221 | (let ((pos-from-end (- (point-max) (point)))) | |
1222 | (or (bobp) | |
1223 | (insert "\f\n")) | |
1224 | ;; Do no formatting while reading error file, | |
1225 | ;; because that can run a shell command, and we | |
1226 | ;; don't want that to cause an infinite recursion. | |
1227 | (format-insert-file error-file nil) | |
1228 | ;; Put point after the inserted errors. | |
1229 | (goto-char (- (point-max) pos-from-end))) | |
1230 | (display-buffer (current-buffer)))) | |
1231 | (delete-file error-file)) | |
1232 | ;; This is like exchange-point-and-mark, but doesn't | |
1233 | ;; activate the mark. It is cleaner to avoid activation, | |
1234 | ;; even though the command loop would deactivate the mark | |
1235 | ;; because we inserted text. | |
1236 | (goto-char (prog1 (mark t) | |
1237 | (set-marker (mark-marker) (point) | |
1238 | (current-buffer))))) | |
c7edd03c KH |
1239 | ;; Preserve the match data in case called from a program. |
1240 | (save-match-data | |
1241 | (if (string-match "[ \t]*&[ \t]*$" command) | |
1242 | ;; Command ending with ampersand means asynchronous. | |
1243 | (let ((buffer (get-buffer-create | |
1244 | (or output-buffer "*Async Shell Command*"))) | |
1245 | (directory default-directory) | |
1246 | proc) | |
1247 | ;; Remove the ampersand. | |
1248 | (setq command (substring command 0 (match-beginning 0))) | |
1249 | ;; If will kill a process, query first. | |
1250 | (setq proc (get-buffer-process buffer)) | |
1251 | (if proc | |
1252 | (if (yes-or-no-p "A command is running. Kill it? ") | |
1253 | (kill-process proc) | |
1254 | (error "Shell command in progress"))) | |
1255 | (save-excursion | |
1256 | (set-buffer buffer) | |
1257 | (setq buffer-read-only nil) | |
1258 | (erase-buffer) | |
1259 | (display-buffer buffer) | |
1260 | (setq default-directory directory) | |
1e722f9f | 1261 | (setq proc (start-process "Shell" buffer shell-file-name |
c7edd03c KH |
1262 | shell-command-switch command)) |
1263 | (setq mode-line-process '(":%s")) | |
1264 | (require 'shell) (shell-mode) | |
1265 | (set-process-sentinel proc 'shell-command-sentinel) | |
1266 | )) | |
cc039f78 KH |
1267 | (shell-command-on-region (point) (point) command |
1268 | output-buffer nil error-buffer))))))) | |
eaae8106 | 1269 | |
f69aad2b MB |
1270 | (defun display-message-or-buffer (message |
1271 | &optional buffer-name not-this-window frame) | |
1272 | "Display MESSAGE in the echo area if possible, otherwise in a pop-up buffer. | |
1273 | MESSAGE may be either a string or a buffer. | |
1274 | ||
1275 | A buffer is displayed using `display-buffer' if MESSAGE is too long for | |
939ac10c GM |
1276 | the maximum height of the echo area, as defined by `max-mini-window-height' |
1277 | if `resize-mini-windows' is non-nil. | |
f69aad2b | 1278 | |
2a3f00bf MB |
1279 | Returns either the string shown in the echo area, or when a pop-up |
1280 | buffer is used, the window used to display it. | |
1281 | ||
f69aad2b MB |
1282 | If MESSAGE is a string, then the optional argument BUFFER-NAME is the |
1283 | name of the buffer used to display it in the case where a pop-up buffer | |
1284 | is used, defaulting to `*Message*'. In the case where MESSAGE is a | |
1285 | string and it is displayed in the echo area, it is not specified whether | |
1286 | the contents are inserted into the buffer anyway. | |
1287 | ||
1288 | Optional arguments NOT-THIS-WINDOW and FRAME are as for `display-buffer', | |
1289 | and only used if a buffer is displayed." | |
1290 | (cond ((and (stringp message) (not (string-match "\n" message))) | |
1291 | ;; Trivial case where we can use the echo area | |
1292 | (message "%s" message)) | |
1293 | ((and (stringp message) | |
1294 | (= (string-match "\n" message) (1- (length message)))) | |
1295 | ;; Trivial case where we can just remove single trailing newline | |
1296 | (message "%s" (substring message 0 (1- (length message))))) | |
1297 | (t | |
1298 | ;; General case | |
1299 | (with-current-buffer | |
1300 | (if (bufferp message) | |
1301 | message | |
1302 | (get-buffer-create (or buffer-name "*Message*"))) | |
1303 | ||
1304 | (unless (bufferp message) | |
1305 | (erase-buffer) | |
1306 | (insert message)) | |
1307 | ||
1308 | (let ((lines | |
1309 | (if (= (buffer-size) 0) | |
1310 | 0 | |
1311 | (count-lines (point-min) (point-max))))) | |
1312 | (cond ((or (<= lines 1) | |
1313 | (<= lines | |
939ac10c GM |
1314 | (if resize-mini-windows |
1315 | (cond ((floatp max-mini-window-height) | |
1316 | (* (frame-height) | |
1317 | max-mini-window-height)) | |
1318 | ((integerp max-mini-window-height) | |
1319 | max-mini-window-height) | |
1320 | (t | |
1321 | 1)) | |
1322 | 1))) | |
f69aad2b MB |
1323 | ;; Echo area |
1324 | (goto-char (point-max)) | |
1325 | (when (bolp) | |
1326 | (backward-char 1)) | |
1327 | (message "%s" (buffer-substring (point-min) (point)))) | |
1328 | (t | |
1329 | ;; Buffer | |
1330 | (goto-char (point-min)) | |
1331 | (display-buffer message not-this-window frame)))))))) | |
1332 | ||
1333 | ||
2076c87c JB |
1334 | ;; We have a sentinel to prevent insertion of a termination message |
1335 | ;; in the buffer itself. | |
1336 | (defun shell-command-sentinel (process signal) | |
bcad4985 | 1337 | (if (memq (process-status process) '(exit signal)) |
1e722f9f | 1338 | (message "%s: %s." |
bcad4985 KH |
1339 | (car (cdr (cdr (process-command process)))) |
1340 | (substring signal 0 -1)))) | |
2076c87c | 1341 | |
d0d74413 | 1342 | (defun shell-command-on-region (start end command |
cce1c318 RS |
1343 | &optional output-buffer replace |
1344 | error-buffer) | |
2076c87c JB |
1345 | "Execute string COMMAND in inferior shell with region as input. |
1346 | Normally display output (if any) in temp buffer `*Shell Command Output*'; | |
a0184aeb DL |
1347 | Prefix arg means replace the region with it. Return the exit code of |
1348 | COMMAND. | |
56c0450e | 1349 | |
07f458c1 RS |
1350 | To specify a coding system for converting non-ASCII characters |
1351 | in the input and output to the shell command, use \\[universal-coding-system-argument] | |
1352 | before this command. By default, the input (from the current buffer) | |
1353 | is encoded in the same coding system that will be used to save the file, | |
1354 | `buffer-file-coding-system'. If the output is going to replace the region, | |
1355 | then it is decoded from that same coding system. | |
1356 | ||
8923a211 RS |
1357 | The noninteractive arguments are START, END, COMMAND, OUTPUT-BUFFER, |
1358 | REPLACE, ERROR-BUFFER. Noninteractive callers can specify coding | |
1359 | systems by binding `coding-system-for-read' and | |
1360 | `coding-system-for-write'. | |
2076c87c | 1361 | |
06933804 | 1362 | If the output is short enough to display in the echo area (which is |
939ac10c GM |
1363 | determined by the variable `max-mini-window-height' if |
1364 | `resize-mini-windows' is non-nil), it is shown there, but it is | |
1365 | nonetheless available in buffer `*Shell Command Output*' even though | |
1366 | that buffer is not automatically displayed. If there is no output, or | |
1367 | if output is inserted in the current buffer, then `*Shell Command | |
1368 | Output*' is deleted. | |
d0d74413 | 1369 | |
56c0450e RS |
1370 | If the optional fourth argument OUTPUT-BUFFER is non-nil, |
1371 | that says to put the output in some other buffer. | |
d0d74413 RS |
1372 | If OUTPUT-BUFFER is a buffer or buffer name, put the output there. |
1373 | If OUTPUT-BUFFER is not a buffer and not nil, | |
1374 | insert output in the current buffer. | |
cce1c318 RS |
1375 | In either case, the output is inserted after point (leaving mark after it). |
1376 | ||
8923a211 RS |
1377 | If REPLACE, the optional fifth argument, is non-nil, that means insert |
1378 | the output in place of text from START to END, putting point and mark | |
1379 | around it. | |
1380 | ||
b735c991 | 1381 | If optional sixth argument ERROR-BUFFER is non-nil, it is a buffer |
cce1c318 | 1382 | or buffer name to which to direct the command's standard error output. |
7fd47839 | 1383 | If it is nil, error output is mingled with regular output. |
cc039f78 KH |
1384 | In an interactive call, the variable `shell-command-default-error-buffer' |
1385 | specifies the value of ERROR-BUFFER." | |
cae49185 RS |
1386 | (interactive (let ((string |
1387 | ;; Do this before calling region-beginning | |
1388 | ;; and region-end, in case subprocess output | |
1389 | ;; relocates them while we are in the minibuffer. | |
1390 | (read-from-minibuffer "Shell command on region: " | |
1391 | nil nil nil | |
1392 | 'shell-command-history))) | |
2b03c506 RS |
1393 | ;; call-interactively recognizes region-beginning and |
1394 | ;; region-end specially, leaving them in the history. | |
1395 | (list (region-beginning) (region-end) | |
cae49185 RS |
1396 | string |
1397 | current-prefix-arg | |
7fd47839 | 1398 | current-prefix-arg |
cc039f78 | 1399 | shell-command-default-error-buffer))) |
cce1c318 | 1400 | (let ((error-file |
171a45d9 | 1401 | (if error-buffer |
b005abd5 | 1402 | (make-temp-file |
171a45d9 EZ |
1403 | (expand-file-name "scor" |
1404 | (or small-temporary-file-directory | |
1405 | temporary-file-directory))) | |
a0184aeb DL |
1406 | nil)) |
1407 | exit-status) | |
7fd47839 RS |
1408 | (if (or replace |
1409 | (and output-buffer | |
748d6ca4 | 1410 | (not (or (bufferp output-buffer) (stringp output-buffer))))) |
7fd47839 RS |
1411 | ;; Replace specified region with output from command. |
1412 | (let ((swap (and replace (< start end)))) | |
1413 | ;; Don't muck with mark unless REPLACE says we should. | |
1414 | (goto-char start) | |
1415 | (and replace (push-mark)) | |
a0184aeb DL |
1416 | (setq exit-status |
1417 | (call-process-region start end shell-file-name t | |
1418 | (if error-file | |
1419 | (list t error-file) | |
1420 | t) | |
1421 | nil shell-command-switch command)) | |
7fd47839 RS |
1422 | (let ((shell-buffer (get-buffer "*Shell Command Output*"))) |
1423 | (and shell-buffer (not (eq shell-buffer (current-buffer))) | |
1424 | (kill-buffer shell-buffer))) | |
1425 | ;; Don't muck with mark unless REPLACE says we should. | |
1426 | (and replace swap (exchange-point-and-mark))) | |
1427 | ;; No prefix argument: put the output in a temp buffer, | |
1428 | ;; replacing its entire contents. | |
1429 | (let ((buffer (get-buffer-create | |
1430 | (or output-buffer "*Shell Command Output*"))) | |
a0184aeb | 1431 | (success nil)) |
7fd47839 RS |
1432 | (unwind-protect |
1433 | (if (eq buffer (current-buffer)) | |
1434 | ;; If the input is the same buffer as the output, | |
1435 | ;; delete everything but the specified region, | |
1436 | ;; then replace that region with the output. | |
1437 | (progn (setq buffer-read-only nil) | |
1438 | (delete-region (max start end) (point-max)) | |
1439 | (delete-region (point-min) (min start end)) | |
1440 | (setq exit-status | |
1441 | (call-process-region (point-min) (point-max) | |
1e722f9f | 1442 | shell-file-name t |
7fd47839 RS |
1443 | (if error-file |
1444 | (list t error-file) | |
1445 | t) | |
a0184aeb DL |
1446 | nil shell-command-switch |
1447 | command))) | |
1448 | ;; Clear the output buffer, then run the command with | |
1449 | ;; output there. | |
c2e303c8 GM |
1450 | (let ((directory default-directory)) |
1451 | (save-excursion | |
1452 | (set-buffer buffer) | |
1453 | (setq buffer-read-only nil) | |
1454 | (if (not output-buffer) | |
1455 | (setq default-directory directory)) | |
1456 | (erase-buffer))) | |
7fd47839 RS |
1457 | (setq exit-status |
1458 | (call-process-region start end shell-file-name nil | |
1459 | (if error-file | |
1460 | (list buffer error-file) | |
1461 | buffer) | |
a0184aeb | 1462 | nil shell-command-switch command))) |
a92da273 | 1463 | (setq success (and exit-status (equal 0 exit-status))) |
7fd47839 | 1464 | ;; Report the amount of output. |
f69aad2b MB |
1465 | (if (with-current-buffer buffer (> (point-max) (point-min))) |
1466 | ;; There's some output, display it | |
1467 | (display-message-or-buffer buffer) | |
1468 | ;; No output; error? | |
1469 | (message (if (and error-file | |
1470 | (< 0 (nth 7 (file-attributes error-file)))) | |
1471 | "(Shell command %sed with some error output)" | |
1472 | "(Shell command %sed with no output)") | |
1473 | (if (equal 0 exit-status) "succeed" "fail")) | |
1474 | (kill-buffer buffer))))) | |
1475 | ||
cc039f78 KH |
1476 | (when (and error-file (file-exists-p error-file)) |
1477 | (if (< 0 (nth 7 (file-attributes error-file))) | |
1478 | (with-current-buffer (get-buffer-create error-buffer) | |
1479 | (let ((pos-from-end (- (point-max) (point)))) | |
1480 | (or (bobp) | |
1481 | (insert "\f\n")) | |
1482 | ;; Do no formatting while reading error file, | |
1483 | ;; because that can run a shell command, and we | |
1484 | ;; don't want that to cause an infinite recursion. | |
1485 | (format-insert-file error-file nil) | |
1486 | ;; Put point after the inserted errors. | |
1487 | (goto-char (- (point-max) pos-from-end))) | |
1488 | (display-buffer (current-buffer)))) | |
1489 | (delete-file error-file)) | |
a0184aeb | 1490 | exit-status)) |
1e722f9f | 1491 | |
d589bd99 RS |
1492 | (defun shell-command-to-string (command) |
1493 | "Execute shell command COMMAND and return its output as a string." | |
1494 | (with-output-to-string | |
17cc9013 RS |
1495 | (with-current-buffer |
1496 | standard-output | |
1497 | (call-process shell-file-name nil t nil shell-command-switch command)))) | |
eaae8106 | 1498 | |
1b43f83f | 1499 | (defvar universal-argument-map |
69d4c3c4 KH |
1500 | (let ((map (make-sparse-keymap))) |
1501 | (define-key map [t] 'universal-argument-other-key) | |
b9ff190d | 1502 | (define-key map (vector meta-prefix-char t) 'universal-argument-other-key) |
69d4c3c4 KH |
1503 | (define-key map [switch-frame] nil) |
1504 | (define-key map [?\C-u] 'universal-argument-more) | |
1505 | (define-key map [?-] 'universal-argument-minus) | |
1506 | (define-key map [?0] 'digit-argument) | |
1507 | (define-key map [?1] 'digit-argument) | |
1508 | (define-key map [?2] 'digit-argument) | |
1509 | (define-key map [?3] 'digit-argument) | |
1510 | (define-key map [?4] 'digit-argument) | |
1511 | (define-key map [?5] 'digit-argument) | |
1512 | (define-key map [?6] 'digit-argument) | |
1513 | (define-key map [?7] 'digit-argument) | |
1514 | (define-key map [?8] 'digit-argument) | |
1515 | (define-key map [?9] 'digit-argument) | |
bd7acc8d GM |
1516 | (define-key map [kp-0] 'digit-argument) |
1517 | (define-key map [kp-1] 'digit-argument) | |
1518 | (define-key map [kp-2] 'digit-argument) | |
1519 | (define-key map [kp-3] 'digit-argument) | |
1520 | (define-key map [kp-4] 'digit-argument) | |
1521 | (define-key map [kp-5] 'digit-argument) | |
1522 | (define-key map [kp-6] 'digit-argument) | |
1523 | (define-key map [kp-7] 'digit-argument) | |
1524 | (define-key map [kp-8] 'digit-argument) | |
1525 | (define-key map [kp-9] 'digit-argument) | |
1526 | (define-key map [kp-subtract] 'universal-argument-minus) | |
69d4c3c4 KH |
1527 | map) |
1528 | "Keymap used while processing \\[universal-argument].") | |
1529 | ||
0de84e16 RS |
1530 | (defvar universal-argument-num-events nil |
1531 | "Number of argument-specifying events read by `universal-argument'. | |
1532 | `universal-argument-other-key' uses this to discard those events | |
1533 | from (this-command-keys), and reread only the final command.") | |
1534 | ||
e8d1a377 KH |
1535 | (defun universal-argument () |
1536 | "Begin a numeric argument for the following command. | |
1537 | Digits or minus sign following \\[universal-argument] make up the numeric argument. | |
1538 | \\[universal-argument] following the digits or minus sign ends the argument. | |
1539 | \\[universal-argument] without digits or minus sign provides 4 as argument. | |
1540 | Repeating \\[universal-argument] without digits or minus sign | |
0565d307 RS |
1541 | multiplies the argument by 4 each time. |
1542 | For some commands, just \\[universal-argument] by itself serves as a flag | |
a697fc62 RS |
1543 | which is different in effect from any particular numeric argument. |
1544 | These commands include \\[set-mark-command] and \\[start-kbd-macro]." | |
69d4c3c4 KH |
1545 | (interactive) |
1546 | (setq prefix-arg (list 4)) | |
0de84e16 | 1547 | (setq universal-argument-num-events (length (this-command-keys))) |
69d4c3c4 | 1548 | (setq overriding-terminal-local-map universal-argument-map)) |
e8d1a377 | 1549 | |
69d4c3c4 KH |
1550 | ;; A subsequent C-u means to multiply the factor by 4 if we've typed |
1551 | ;; nothing but C-u's; otherwise it means to terminate the prefix arg. | |
1552 | (defun universal-argument-more (arg) | |
e8d1a377 | 1553 | (interactive "P") |
69d4c3c4 KH |
1554 | (if (consp arg) |
1555 | (setq prefix-arg (list (* 4 (car arg)))) | |
1cd24721 RS |
1556 | (if (eq arg '-) |
1557 | (setq prefix-arg (list -4)) | |
1558 | (setq prefix-arg arg) | |
1559 | (setq overriding-terminal-local-map nil))) | |
0de84e16 | 1560 | (setq universal-argument-num-events (length (this-command-keys)))) |
e8d1a377 KH |
1561 | |
1562 | (defun negative-argument (arg) | |
1563 | "Begin a negative numeric argument for the next command. | |
1564 | \\[universal-argument] following digits or minus sign ends the argument." | |
1565 | (interactive "P") | |
69d4c3c4 KH |
1566 | (cond ((integerp arg) |
1567 | (setq prefix-arg (- arg))) | |
1568 | ((eq arg '-) | |
1569 | (setq prefix-arg nil)) | |
1570 | (t | |
b9ff190d | 1571 | (setq prefix-arg '-))) |
0de84e16 | 1572 | (setq universal-argument-num-events (length (this-command-keys))) |
b9ff190d | 1573 | (setq overriding-terminal-local-map universal-argument-map)) |
69d4c3c4 KH |
1574 | |
1575 | (defun digit-argument (arg) | |
1576 | "Part of the numeric argument for the next command. | |
1577 | \\[universal-argument] following digits or minus sign ends the argument." | |
1578 | (interactive "P") | |
bd7acc8d GM |
1579 | (let* ((char (if (integerp last-command-char) |
1580 | last-command-char | |
1581 | (get last-command-char 'ascii-character))) | |
1582 | (digit (- (logand char ?\177) ?0))) | |
69d4c3c4 KH |
1583 | (cond ((integerp arg) |
1584 | (setq prefix-arg (+ (* arg 10) | |
1585 | (if (< arg 0) (- digit) digit)))) | |
1586 | ((eq arg '-) | |
1587 | ;; Treat -0 as just -, so that -01 will work. | |
1588 | (setq prefix-arg (if (zerop digit) '- (- digit)))) | |
1589 | (t | |
b9ff190d | 1590 | (setq prefix-arg digit)))) |
0de84e16 | 1591 | (setq universal-argument-num-events (length (this-command-keys))) |
b9ff190d | 1592 | (setq overriding-terminal-local-map universal-argument-map)) |
69d4c3c4 KH |
1593 | |
1594 | ;; For backward compatibility, minus with no modifiers is an ordinary | |
1595 | ;; command if digits have already been entered. | |
1596 | (defun universal-argument-minus (arg) | |
1597 | (interactive "P") | |
1598 | (if (integerp arg) | |
1599 | (universal-argument-other-key arg) | |
1600 | (negative-argument arg))) | |
1601 | ||
1602 | ;; Anything else terminates the argument and is left in the queue to be | |
1603 | ;; executed as a command. | |
1604 | (defun universal-argument-other-key (arg) | |
1605 | (interactive "P") | |
1606 | (setq prefix-arg arg) | |
0de84e16 RS |
1607 | (let* ((key (this-command-keys)) |
1608 | (keylist (listify-key-sequence key))) | |
1609 | (setq unread-command-events | |
06697cdb RS |
1610 | (append (nthcdr universal-argument-num-events keylist) |
1611 | unread-command-events))) | |
f0ef2555 | 1612 | (reset-this-command-lengths) |
69d4c3c4 | 1613 | (setq overriding-terminal-local-map nil)) |
eaae8106 | 1614 | |
93be67de | 1615 | ;;;; Window system cut and paste hooks. |
70e14c01 JB |
1616 | |
1617 | (defvar interprogram-cut-function nil | |
1618 | "Function to call to make a killed region available to other programs. | |
1619 | ||
1620 | Most window systems provide some sort of facility for cutting and | |
9f112a3d RS |
1621 | pasting text between the windows of different programs. |
1622 | This variable holds a function that Emacs calls whenever text | |
1623 | is put in the kill ring, to make the new kill available to other | |
70e14c01 JB |
1624 | programs. |
1625 | ||
9f112a3d RS |
1626 | The function takes one or two arguments. |
1627 | The first argument, TEXT, is a string containing | |
1628 | the text which should be made available. | |
1629 | The second, PUSH, if non-nil means this is a \"new\" kill; | |
1630 | nil means appending to an \"old\" kill.") | |
70e14c01 JB |
1631 | |
1632 | (defvar interprogram-paste-function nil | |
1633 | "Function to call to get text cut from other programs. | |
1634 | ||
1635 | Most window systems provide some sort of facility for cutting and | |
9f112a3d RS |
1636 | pasting text between the windows of different programs. |
1637 | This variable holds a function that Emacs calls to obtain | |
70e14c01 JB |
1638 | text that other programs have provided for pasting. |
1639 | ||
1640 | The function should be called with no arguments. If the function | |
1641 | returns nil, then no other program has provided such text, and the top | |
1642 | of the Emacs kill ring should be used. If the function returns a | |
daa37602 JB |
1643 | string, that string should be put in the kill ring as the latest kill. |
1644 | ||
1645 | Note that the function should return a string only if a program other | |
1646 | than Emacs has provided a string for pasting; if Emacs provided the | |
1647 | most recent string, the function should return nil. If it is | |
1648 | difficult to tell whether Emacs or some other program provided the | |
1649 | current string, it is probably good enough to return nil if the string | |
1650 | is equal (according to `string=') to the last text Emacs provided.") | |
70e14c01 JB |
1651 | |
1652 | ||
eaae8106 | 1653 | |
70e14c01 | 1654 | ;;;; The kill ring data structure. |
2076c87c JB |
1655 | |
1656 | (defvar kill-ring nil | |
70e14c01 JB |
1657 | "List of killed text sequences. |
1658 | Since the kill ring is supposed to interact nicely with cut-and-paste | |
1659 | facilities offered by window systems, use of this variable should | |
1660 | interact nicely with `interprogram-cut-function' and | |
1661 | `interprogram-paste-function'. The functions `kill-new', | |
1662 | `kill-append', and `current-kill' are supposed to implement this | |
1663 | interaction; you may want to use them instead of manipulating the kill | |
1664 | ring directly.") | |
2076c87c | 1665 | |
bffa4d92 | 1666 | (defcustom kill-ring-max 60 |
69c1dd37 RS |
1667 | "*Maximum length of kill ring before oldest elements are thrown away." |
1668 | :type 'integer | |
1669 | :group 'killing) | |
2076c87c JB |
1670 | |
1671 | (defvar kill-ring-yank-pointer nil | |
1672 | "The tail of the kill ring whose car is the last thing yanked.") | |
1673 | ||
f914dc91 | 1674 | (defun kill-new (string &optional replace) |
70e14c01 JB |
1675 | "Make STRING the latest kill in the kill ring. |
1676 | Set the kill-ring-yank pointer to point to it. | |
f914dc91 KH |
1677 | If `interprogram-cut-function' is non-nil, apply it to STRING. |
1678 | Optional second argument REPLACE non-nil means that STRING will replace | |
1679 | the front of the kill ring, rather than being added to the list." | |
f1d01ba2 KH |
1680 | (and (fboundp 'menu-bar-update-yank-menu) |
1681 | (menu-bar-update-yank-menu string (and replace (car kill-ring)))) | |
ab7e20d5 | 1682 | (if (and replace kill-ring) |
f914dc91 KH |
1683 | (setcar kill-ring string) |
1684 | (setq kill-ring (cons string kill-ring)) | |
1685 | (if (> (length kill-ring) kill-ring-max) | |
1686 | (setcdr (nthcdr (1- kill-ring-max) kill-ring) nil))) | |
70e14c01 JB |
1687 | (setq kill-ring-yank-pointer kill-ring) |
1688 | (if interprogram-cut-function | |
657a33ab | 1689 | (funcall interprogram-cut-function string (not replace)))) |
70e14c01 | 1690 | |
2076c87c | 1691 | (defun kill-append (string before-p) |
70e14c01 JB |
1692 | "Append STRING to the end of the latest kill in the kill ring. |
1693 | If BEFORE-P is non-nil, prepend STRING to the kill. | |
88c1aa79 | 1694 | If `interprogram-cut-function' is set, pass the resulting kill to |
70e14c01 | 1695 | it." |
f914dc91 KH |
1696 | (kill-new (if before-p |
1697 | (concat string (car kill-ring)) | |
1698 | (concat (car kill-ring) string)) t)) | |
70e14c01 JB |
1699 | |
1700 | (defun current-kill (n &optional do-not-move) | |
1701 | "Rotate the yanking point by N places, and then return that kill. | |
1702 | If N is zero, `interprogram-paste-function' is set, and calling it | |
1703 | returns a string, then that string is added to the front of the | |
1704 | kill ring and returned as the latest kill. | |
1e722f9f | 1705 | If optional arg DO-NOT-MOVE is non-nil, then don't actually move the |
70e14c01 JB |
1706 | yanking point; just return the Nth kill forward." |
1707 | (let ((interprogram-paste (and (= n 0) | |
1708 | interprogram-paste-function | |
1709 | (funcall interprogram-paste-function)))) | |
1710 | (if interprogram-paste | |
1711 | (progn | |
1712 | ;; Disable the interprogram cut function when we add the new | |
1713 | ;; text to the kill ring, so Emacs doesn't try to own the | |
1714 | ;; selection, with identical text. | |
1715 | (let ((interprogram-cut-function nil)) | |
1716 | (kill-new interprogram-paste)) | |
1717 | interprogram-paste) | |
1718 | (or kill-ring (error "Kill ring is empty")) | |
47096a67 PE |
1719 | (let ((ARGth-kill-element |
1720 | (nthcdr (mod (- n (length kill-ring-yank-pointer)) | |
1721 | (length kill-ring)) | |
1722 | kill-ring))) | |
70e14c01 JB |
1723 | (or do-not-move |
1724 | (setq kill-ring-yank-pointer ARGth-kill-element)) | |
1725 | (car ARGth-kill-element))))) | |
c88ab9ce | 1726 | |
c88ab9ce | 1727 | |
eaae8106 | 1728 | |
70e14c01 | 1729 | ;;;; Commands for manipulating the kill ring. |
c88ab9ce | 1730 | |
69c1dd37 RS |
1731 | (defcustom kill-read-only-ok nil |
1732 | "*Non-nil means don't signal an error for killing read-only text." | |
1733 | :type 'boolean | |
1734 | :group 'killing) | |
e6291fe1 | 1735 | |
3a5da8a8 RS |
1736 | (put 'text-read-only 'error-conditions |
1737 | '(text-read-only buffer-read-only error)) | |
1738 | (put 'text-read-only 'error-message "Text is read-only") | |
1739 | ||
2076c87c JB |
1740 | (defun kill-region (beg end) |
1741 | "Kill between point and mark. | |
1742 | The text is deleted but saved in the kill ring. | |
1743 | The command \\[yank] can retrieve it from there. | |
1744 | \(If you want to kill and then yank immediately, use \\[copy-region-as-kill].) | |
2aa7a8bf JB |
1745 | If the buffer is read-only, Emacs will beep and refrain from deleting |
1746 | the text, but put the text in the kill ring anyway. This means that | |
1747 | you can use the killing commands to copy text from a read-only buffer. | |
2076c87c JB |
1748 | |
1749 | This is the primitive for programs to kill text (as opposed to deleting it). | |
1750 | Supply two arguments, character numbers indicating the stretch of text | |
1751 | to be killed. | |
1752 | Any command that calls this function is a \"kill command\". | |
1753 | If the previous command was also a kill command, | |
1754 | the text killed this time appends to the text killed last time | |
1755 | to make one entry in the kill ring." | |
e761e42c | 1756 | (interactive "r") |
ccd19b9f | 1757 | (condition-case nil |
a1eb02bd SM |
1758 | (let ((string (delete-and-extract-region beg end))) |
1759 | (when string ;STRING is nil if BEG = END | |
1760 | ;; Add that string to the kill ring, one way or another. | |
1761 | (if (eq last-command 'kill-region) | |
1762 | (kill-append string (< end beg)) | |
1763 | (kill-new string))) | |
ccd19b9f KH |
1764 | (setq this-command 'kill-region)) |
1765 | ((buffer-read-only text-read-only) | |
1766 | ;; The code above failed because the buffer, or some of the characters | |
1767 | ;; in the region, are read-only. | |
1768 | ;; We should beep, in case the user just isn't aware of this. | |
1769 | ;; However, there's no harm in putting | |
1770 | ;; the region's text in the kill ring, anyway. | |
1771 | (copy-region-as-kill beg end) | |
cb3e1b4c RS |
1772 | ;; Set this-command now, so it will be set even if we get an error. |
1773 | (setq this-command 'kill-region) | |
1774 | ;; This should barf, if appropriate, and give us the correct error. | |
ccd19b9f KH |
1775 | (if kill-read-only-ok |
1776 | (message "Read only text copied to kill ring") | |
ccd19b9f KH |
1777 | ;; Signal an error if the buffer is read-only. |
1778 | (barf-if-buffer-read-only) | |
1779 | ;; If the buffer isn't read-only, the text is. | |
1780 | (signal 'text-read-only (list (current-buffer))))))) | |
2076c87c | 1781 | |
a382890a KH |
1782 | ;; copy-region-as-kill no longer sets this-command, because it's confusing |
1783 | ;; to get two copies of the text when the user accidentally types M-w and | |
1784 | ;; then corrects it with the intended C-w. | |
2076c87c JB |
1785 | (defun copy-region-as-kill (beg end) |
1786 | "Save the region as if killed, but don't kill it. | |
0e264847 | 1787 | In Transient Mark mode, deactivate the mark. |
46947372 JB |
1788 | If `interprogram-cut-function' is non-nil, also save the text for a window |
1789 | system cut and paste." | |
2076c87c JB |
1790 | (interactive "r") |
1791 | (if (eq last-command 'kill-region) | |
1792 | (kill-append (buffer-substring beg end) (< end beg)) | |
70e14c01 | 1793 | (kill-new (buffer-substring beg end))) |
1e722f9f | 1794 | (if transient-mark-mode |
5c7319b6 | 1795 | (setq deactivate-mark t)) |
2076c87c JB |
1796 | nil) |
1797 | ||
1798 | (defun kill-ring-save (beg end) | |
0964e562 | 1799 | "Save the region as if killed, but don't kill it. |
0e264847 | 1800 | In Transient Mark mode, deactivate the mark. |
0964e562 | 1801 | If `interprogram-cut-function' is non-nil, also save the text for a window |
0e264847 RS |
1802 | system cut and paste. |
1803 | ||
1804 | This command is similar to `copy-region-as-kill', except that it gives | |
1805 | visual feedback indicating the extent of the region being copied." | |
2076c87c JB |
1806 | (interactive "r") |
1807 | (copy-region-as-kill beg end) | |
3a801d0c | 1808 | (if (interactive-p) |
66050f10 RS |
1809 | (let ((other-end (if (= (point) beg) end beg)) |
1810 | (opoint (point)) | |
1811 | ;; Inhibit quitting so we can make a quit here | |
1812 | ;; look like a C-g typed as a command. | |
1813 | (inhibit-quit t)) | |
1814 | (if (pos-visible-in-window-p other-end (selected-window)) | |
1815 | (progn | |
1816 | ;; Swap point and mark. | |
1817 | (set-marker (mark-marker) (point) (current-buffer)) | |
1818 | (goto-char other-end) | |
1819 | (sit-for 1) | |
1820 | ;; Swap back. | |
1821 | (set-marker (mark-marker) other-end (current-buffer)) | |
1822 | (goto-char opoint) | |
1823 | ;; If user quit, deactivate the mark | |
1824 | ;; as C-g would as a command. | |
e4e593ae | 1825 | (and quit-flag mark-active |
fcadf1c7 | 1826 | (deactivate-mark))) |
66050f10 RS |
1827 | (let* ((killed-text (current-kill 0)) |
1828 | (message-len (min (length killed-text) 40))) | |
1829 | (if (= (point) beg) | |
1830 | ;; Don't say "killed"; that is misleading. | |
1831 | (message "Saved text until \"%s\"" | |
1832 | (substring killed-text (- message-len))) | |
1833 | (message "Saved text from \"%s\"" | |
1834 | (substring killed-text 0 message-len)))))))) | |
2076c87c | 1835 | |
c75d4986 KH |
1836 | (defun append-next-kill (&optional interactive) |
1837 | "Cause following command, if it kills, to append to previous kill. | |
1838 | The argument is used for internal purposes; do not supply one." | |
1839 | (interactive "p") | |
1840 | ;; We don't use (interactive-p), since that breaks kbd macros. | |
1841 | (if interactive | |
2076c87c JB |
1842 | (progn |
1843 | (setq this-command 'kill-region) | |
1844 | (message "If the next command is a kill, it will append")) | |
1845 | (setq last-command 'kill-region))) | |
eaae8106 | 1846 | |
93be67de | 1847 | ;; Yanking. |
2076c87c | 1848 | |
2076c87c | 1849 | (defun yank-pop (arg) |
ff1fbe3e RS |
1850 | "Replace just-yanked stretch of killed text with a different stretch. |
1851 | This command is allowed only immediately after a `yank' or a `yank-pop'. | |
2076c87c | 1852 | At such a time, the region contains a stretch of reinserted |
ff1fbe3e | 1853 | previously-killed text. `yank-pop' deletes that text and inserts in its |
2076c87c JB |
1854 | place a different stretch of killed text. |
1855 | ||
1856 | With no argument, the previous kill is inserted. | |
ff1fbe3e RS |
1857 | With argument N, insert the Nth previous kill. |
1858 | If N is negative, this is a more recent kill. | |
2076c87c JB |
1859 | |
1860 | The sequence of kills wraps around, so that after the oldest one | |
1861 | comes the newest one." | |
1862 | (interactive "*p") | |
1863 | (if (not (eq last-command 'yank)) | |
1864 | (error "Previous command was not a yank")) | |
1865 | (setq this-command 'yank) | |
3a5da8a8 RS |
1866 | (let ((inhibit-read-only t) |
1867 | (before (< (point) (mark t)))) | |
9a1277dd | 1868 | (delete-region (point) (mark t)) |
fd0f4056 | 1869 | (set-marker (mark-marker) (point) (current-buffer)) |
6cd829a8 | 1870 | (let ((opoint (point))) |
7ae13091 | 1871 | (insert (current-kill arg)) |
6cd829a8 RS |
1872 | (let ((inhibit-read-only t)) |
1873 | (remove-text-properties opoint (point) '(read-only nil)))) | |
fd0f4056 RS |
1874 | (if before |
1875 | ;; This is like exchange-point-and-mark, but doesn't activate the mark. | |
1876 | ;; It is cleaner to avoid activation, even though the command | |
1877 | ;; loop would deactivate the mark because we inserted text. | |
1878 | (goto-char (prog1 (mark t) | |
1879 | (set-marker (mark-marker) (point) (current-buffer)))))) | |
0964e562 | 1880 | nil) |
2076c87c JB |
1881 | |
1882 | (defun yank (&optional arg) | |
1883 | "Reinsert the last stretch of killed text. | |
1884 | More precisely, reinsert the stretch of killed text most recently | |
ff1fbe3e RS |
1885 | killed OR yanked. Put point at end, and set mark at beginning. |
1886 | With just C-u as argument, same but put point at beginning (and mark at end). | |
1887 | With argument N, reinsert the Nth most recently killed stretch of killed | |
2076c87c JB |
1888 | text. |
1889 | See also the command \\[yank-pop]." | |
1890 | (interactive "*P") | |
456c617c RS |
1891 | ;; If we don't get all the way thru, make last-command indicate that |
1892 | ;; for the following command. | |
1893 | (setq this-command t) | |
2076c87c | 1894 | (push-mark (point)) |
6cd829a8 | 1895 | (let ((opoint (point))) |
7ae13091 RS |
1896 | (insert (current-kill (cond |
1897 | ((listp arg) 0) | |
1898 | ((eq arg '-) -1) | |
1899 | (t (1- arg))))) | |
6cd829a8 RS |
1900 | (let ((inhibit-read-only t)) |
1901 | (remove-text-properties opoint (point) '(read-only nil)))) | |
2076c87c | 1902 | (if (consp arg) |
fd0f4056 RS |
1903 | ;; This is like exchange-point-and-mark, but doesn't activate the mark. |
1904 | ;; It is cleaner to avoid activation, even though the command | |
1905 | ;; loop would deactivate the mark because we inserted text. | |
1906 | (goto-char (prog1 (mark t) | |
1907 | (set-marker (mark-marker) (point) (current-buffer))))) | |
456c617c RS |
1908 | ;; If we do get all the way thru, make this-command indicate that. |
1909 | (setq this-command 'yank) | |
0964e562 | 1910 | nil) |
70e14c01 JB |
1911 | |
1912 | (defun rotate-yank-pointer (arg) | |
1913 | "Rotate the yanking point in the kill ring. | |
1914 | With argument, rotate that many kills forward (or backward, if negative)." | |
1915 | (interactive "p") | |
1916 | (current-kill arg)) | |
eaae8106 | 1917 | |
93be67de KH |
1918 | ;; Some kill commands. |
1919 | ||
1920 | ;; Internal subroutine of delete-char | |
1921 | (defun kill-forward-chars (arg) | |
1922 | (if (listp arg) (setq arg (car arg))) | |
1923 | (if (eq arg '-) (setq arg -1)) | |
1924 | (kill-region (point) (forward-point arg))) | |
1925 | ||
1926 | ;; Internal subroutine of backward-delete-char | |
1927 | (defun kill-backward-chars (arg) | |
1928 | (if (listp arg) (setq arg (car arg))) | |
1929 | (if (eq arg '-) (setq arg -1)) | |
1930 | (kill-region (point) (forward-point (- arg)))) | |
1931 | ||
1932 | (defcustom backward-delete-char-untabify-method 'untabify | |
1933 | "*The method for untabifying when deleting backward. | |
1e722f9f SS |
1934 | Can be `untabify' -- turn a tab to many spaces, then delete one space; |
1935 | `hungry' -- delete all whitespace, both tabs and spaces; | |
1936 | `all' -- delete all whitespace, including tabs, spaces and newlines; | |
93be67de | 1937 | nil -- just delete one character." |
1e722f9f | 1938 | :type '(choice (const untabify) (const hungry) (const all) (const nil)) |
93be67de KH |
1939 | :group 'killing) |
1940 | ||
1941 | (defun backward-delete-char-untabify (arg &optional killp) | |
1942 | "Delete characters backward, changing tabs into spaces. | |
1943 | The exact behavior depends on `backward-delete-char-untabify-method'. | |
1944 | Delete ARG chars, and kill (save in kill ring) if KILLP is non-nil. | |
1945 | Interactively, ARG is the prefix arg (default 1) | |
1946 | and KILLP is t if a prefix arg was specified." | |
1947 | (interactive "*p\nP") | |
1948 | (when (eq backward-delete-char-untabify-method 'untabify) | |
1949 | (let ((count arg)) | |
1950 | (save-excursion | |
1951 | (while (and (> count 0) (not (bobp))) | |
1952 | (if (= (preceding-char) ?\t) | |
1953 | (let ((col (current-column))) | |
1954 | (forward-char -1) | |
1955 | (setq col (- col (current-column))) | |
1956 | (insert-char ?\ col) | |
1957 | (delete-char 1))) | |
1958 | (forward-char -1) | |
1959 | (setq count (1- count)))))) | |
1960 | (delete-backward-char | |
1e722f9f SS |
1961 | (let ((skip (cond ((eq backward-delete-char-untabify-method 'hungry) " \t") |
1962 | ((eq backward-delete-char-untabify-method 'all) | |
1963 | " \t\n\r")))) | |
1964 | (if skip | |
1965 | (let ((wh (- (point) (save-excursion (skip-chars-backward skip) | |
93be67de KH |
1966 | (point))))) |
1967 | (+ arg (if (zerop wh) 0 (1- wh)))) | |
1e722f9f | 1968 | arg)) |
93be67de KH |
1969 | killp)) |
1970 | ||
1971 | (defun zap-to-char (arg char) | |
1972 | "Kill up to and including ARG'th occurrence of CHAR. | |
1973 | Case is ignored if `case-fold-search' is non-nil in the current buffer. | |
1974 | Goes backward if ARG is negative; error if CHAR not found." | |
e761e42c | 1975 | (interactive "p\ncZap to char: ") |
93be67de KH |
1976 | (kill-region (point) (progn |
1977 | (search-forward (char-to-string char) nil nil arg) | |
1978 | ; (goto-char (if (> arg 0) (1- (point)) (1+ (point)))) | |
1979 | (point)))) | |
eaae8106 | 1980 | |
93be67de KH |
1981 | ;; kill-line and its subroutines. |
1982 | ||
1983 | (defcustom kill-whole-line nil | |
1984 | "*If non-nil, `kill-line' with no arg at beg of line kills the whole line." | |
1985 | :type 'boolean | |
1986 | :group 'killing) | |
1987 | ||
1988 | (defun kill-line (&optional arg) | |
1989 | "Kill the rest of the current line; if no nonblanks there, kill thru newline. | |
1990 | With prefix argument, kill that many lines from point. | |
1991 | Negative arguments kill lines backward. | |
8be7408c | 1992 | With zero argument, kills the text before point on the current line. |
93be67de KH |
1993 | |
1994 | When calling from a program, nil means \"no arg\", | |
1995 | a number counts as a prefix arg. | |
1996 | ||
1997 | To kill a whole line, when point is not at the beginning, type \ | |
1998 | \\[beginning-of-line] \\[kill-line] \\[kill-line]. | |
1999 | ||
2000 | If `kill-whole-line' is non-nil, then this command kills the whole line | |
2001 | including its terminating newline, when used at the beginning of a line | |
2002 | with no argument. As a consequence, you can always kill a whole line | |
2003 | by typing \\[beginning-of-line] \\[kill-line]." | |
e761e42c | 2004 | (interactive "P") |
93be67de KH |
2005 | (kill-region (point) |
2006 | ;; It is better to move point to the other end of the kill | |
2007 | ;; before killing. That way, in a read-only buffer, point | |
2008 | ;; moves across the text that is copied to the kill ring. | |
2009 | ;; The choice has no effect on undo now that undo records | |
2010 | ;; the value of point from before the command was run. | |
2011 | (progn | |
2012 | (if arg | |
2013 | (forward-visible-line (prefix-numeric-value arg)) | |
2014 | (if (eobp) | |
2015 | (signal 'end-of-buffer nil)) | |
2016 | (if (or (looking-at "[ \t]*$") (and kill-whole-line (bolp))) | |
2017 | (forward-visible-line 1) | |
2018 | (end-of-visible-line))) | |
2019 | (point)))) | |
2020 | ||
2021 | (defun forward-visible-line (arg) | |
2022 | "Move forward by ARG lines, ignoring currently invisible newlines only. | |
2023 | If ARG is negative, move backward -ARG lines. | |
2024 | If ARG is zero, move to the beginning of the current line." | |
2025 | (condition-case nil | |
2026 | (if (> arg 0) | |
2027 | (while (> arg 0) | |
2028 | (or (zerop (forward-line 1)) | |
2029 | (signal 'end-of-buffer nil)) | |
2030 | ;; If the following character is currently invisible, | |
2031 | ;; skip all characters with that same `invisible' property value, | |
2032 | ;; then find the next newline. | |
2033 | (while (and (not (eobp)) | |
2034 | (let ((prop | |
2035 | (get-char-property (point) 'invisible))) | |
2036 | (if (eq buffer-invisibility-spec t) | |
2037 | prop | |
2038 | (or (memq prop buffer-invisibility-spec) | |
2039 | (assq prop buffer-invisibility-spec))))) | |
2040 | (goto-char | |
2041 | (if (get-text-property (point) 'invisible) | |
2042 | (or (next-single-property-change (point) 'invisible) | |
2043 | (point-max)) | |
2044 | (next-overlay-change (point)))) | |
2045 | (or (zerop (forward-line 1)) | |
2046 | (signal 'end-of-buffer nil))) | |
2047 | (setq arg (1- arg))) | |
2048 | (let ((first t)) | |
2049 | (while (or first (< arg 0)) | |
2050 | (if (zerop arg) | |
2051 | (beginning-of-line) | |
2052 | (or (zerop (forward-line -1)) | |
2053 | (signal 'beginning-of-buffer nil))) | |
2054 | (while (and (not (bobp)) | |
2055 | (let ((prop | |
2056 | (get-char-property (1- (point)) 'invisible))) | |
2057 | (if (eq buffer-invisibility-spec t) | |
2058 | prop | |
2059 | (or (memq prop buffer-invisibility-spec) | |
2060 | (assq prop buffer-invisibility-spec))))) | |
2061 | (goto-char | |
2062 | (if (get-text-property (1- (point)) 'invisible) | |
2063 | (or (previous-single-property-change (point) 'invisible) | |
2064 | (point-min)) | |
2065 | (previous-overlay-change (point)))) | |
2066 | (or (zerop (forward-line -1)) | |
2067 | (signal 'beginning-of-buffer nil))) | |
2068 | (setq first nil) | |
2069 | (setq arg (1+ arg))))) | |
2070 | ((beginning-of-buffer end-of-buffer) | |
2071 | nil))) | |
70e14c01 | 2072 | |
93be67de KH |
2073 | (defun end-of-visible-line () |
2074 | "Move to end of current visible line." | |
2075 | (end-of-line) | |
2076 | ;; If the following character is currently invisible, | |
2077 | ;; skip all characters with that same `invisible' property value, | |
2078 | ;; then find the next newline. | |
2079 | (while (and (not (eobp)) | |
2080 | (let ((prop | |
2081 | (get-char-property (point) 'invisible))) | |
2082 | (if (eq buffer-invisibility-spec t) | |
2083 | prop | |
2084 | (or (memq prop buffer-invisibility-spec) | |
2085 | (assq prop buffer-invisibility-spec))))) | |
2086 | (if (get-text-property (point) 'invisible) | |
2087 | (goto-char (next-single-property-change (point) 'invisible)) | |
2088 | (goto-char (next-overlay-change (point)))) | |
2089 | (end-of-line))) | |
eaae8106 | 2090 | |
2076c87c JB |
2091 | (defun insert-buffer (buffer) |
2092 | "Insert after point the contents of BUFFER. | |
2093 | Puts mark after the inserted text. | |
6cb6e7a2 GM |
2094 | BUFFER may be a buffer or a buffer name. |
2095 | ||
2096 | This function is meant for the user to run interactively. | |
2097 | Don't call it from programs!" | |
c3d4f949 | 2098 | (interactive |
a3e7c391 FP |
2099 | (list |
2100 | (progn | |
2101 | (barf-if-buffer-read-only) | |
2102 | (read-buffer "Insert buffer: " | |
2103 | (if (eq (selected-window) (next-window (selected-window))) | |
2104 | (other-buffer (current-buffer)) | |
2105 | (window-buffer (next-window (selected-window)))) | |
2106 | t)))) | |
2076c87c JB |
2107 | (or (bufferp buffer) |
2108 | (setq buffer (get-buffer buffer))) | |
2109 | (let (start end newmark) | |
2110 | (save-excursion | |
2111 | (save-excursion | |
2112 | (set-buffer buffer) | |
2113 | (setq start (point-min) end (point-max))) | |
2114 | (insert-buffer-substring buffer start end) | |
2115 | (setq newmark (point))) | |
1537a263 JB |
2116 | (push-mark newmark)) |
2117 | nil) | |
2076c87c JB |
2118 | |
2119 | (defun append-to-buffer (buffer start end) | |
2120 | "Append to specified buffer the text of the region. | |
2121 | It is inserted into that buffer before its point. | |
2122 | ||
2123 | When calling from a program, give three arguments: | |
2124 | BUFFER (or buffer name), START and END. | |
2125 | START and END specify the portion of the current buffer to be copied." | |
70e14c01 | 2126 | (interactive |
5d771766 | 2127 | (list (read-buffer "Append to buffer: " (other-buffer (current-buffer) t)) |
23efee2c | 2128 | (region-beginning) (region-end))) |
2076c87c JB |
2129 | (let ((oldbuf (current-buffer))) |
2130 | (save-excursion | |
c069a480 GM |
2131 | (let* ((append-to (get-buffer-create buffer)) |
2132 | (windows (get-buffer-window-list append-to t t)) | |
2133 | point) | |
2134 | (set-buffer append-to) | |
2135 | (setq point (point)) | |
2136 | (barf-if-buffer-read-only) | |
2137 | (insert-buffer-substring oldbuf start end) | |
2138 | (dolist (window windows) | |
2139 | (when (= (window-point window) point) | |
2140 | (set-window-point window (point)))))))) | |
2076c87c JB |
2141 | |
2142 | (defun prepend-to-buffer (buffer start end) | |
2143 | "Prepend to specified buffer the text of the region. | |
2144 | It is inserted into that buffer after its point. | |
2145 | ||
2146 | When calling from a program, give three arguments: | |
2147 | BUFFER (or buffer name), START and END. | |
2148 | START and END specify the portion of the current buffer to be copied." | |
2149 | (interactive "BPrepend to buffer: \nr") | |
2150 | (let ((oldbuf (current-buffer))) | |
2151 | (save-excursion | |
2152 | (set-buffer (get-buffer-create buffer)) | |
74399eac | 2153 | (barf-if-buffer-read-only) |
2076c87c JB |
2154 | (save-excursion |
2155 | (insert-buffer-substring oldbuf start end))))) | |
2156 | ||
2157 | (defun copy-to-buffer (buffer start end) | |
2158 | "Copy to specified buffer the text of the region. | |
2159 | It is inserted into that buffer, replacing existing text there. | |
2160 | ||
2161 | When calling from a program, give three arguments: | |
2162 | BUFFER (or buffer name), START and END. | |
2163 | START and END specify the portion of the current buffer to be copied." | |
2164 | (interactive "BCopy to buffer: \nr") | |
2165 | (let ((oldbuf (current-buffer))) | |
2166 | (save-excursion | |
2167 | (set-buffer (get-buffer-create buffer)) | |
74399eac | 2168 | (barf-if-buffer-read-only) |
2076c87c JB |
2169 | (erase-buffer) |
2170 | (save-excursion | |
2171 | (insert-buffer-substring oldbuf start end))))) | |
eaae8106 | 2172 | |
62d1c1fc RM |
2173 | (put 'mark-inactive 'error-conditions '(mark-inactive error)) |
2174 | (put 'mark-inactive 'error-message "The mark is not active now") | |
2175 | ||
af39530e | 2176 | (defun mark (&optional force) |
c7c8b31e | 2177 | "Return this buffer's mark value as integer; error if mark inactive. |
af39530e | 2178 | If optional argument FORCE is non-nil, access the mark value |
c7c8b31e RS |
2179 | even if the mark is not currently active, and return nil |
2180 | if there is no mark at all. | |
af39530e | 2181 | |
2076c87c JB |
2182 | If you are using this in an editing command, you are most likely making |
2183 | a mistake; see the documentation of `set-mark'." | |
0e3a7b14 | 2184 | (if (or force (not transient-mark-mode) mark-active mark-even-if-inactive) |
af39530e | 2185 | (marker-position (mark-marker)) |
62d1c1fc | 2186 | (signal 'mark-inactive nil))) |
2076c87c | 2187 | |
19d35374 RM |
2188 | ;; Many places set mark-active directly, and several of them failed to also |
2189 | ;; run deactivate-mark-hook. This shorthand should simplify. | |
2190 | (defsubst deactivate-mark () | |
2191 | "Deactivate the mark by setting `mark-active' to nil. | |
fcadf1c7 | 2192 | \(That makes a difference only in Transient Mark mode.) |
19d35374 | 2193 | Also runs the hook `deactivate-mark-hook'." |
a4b9d3da RS |
2194 | (if transient-mark-mode |
2195 | (progn | |
2196 | (setq mark-active nil) | |
2197 | (run-hooks 'deactivate-mark-hook)))) | |
19d35374 | 2198 | |
2076c87c JB |
2199 | (defun set-mark (pos) |
2200 | "Set this buffer's mark to POS. Don't use this function! | |
2201 | That is to say, don't use this function unless you want | |
2202 | the user to see that the mark has moved, and you want the previous | |
2203 | mark position to be lost. | |
2204 | ||
2205 | Normally, when a new mark is set, the old one should go on the stack. | |
2206 | This is why most applications should use push-mark, not set-mark. | |
2207 | ||
ff1fbe3e | 2208 | Novice Emacs Lisp programmers often try to use the mark for the wrong |
2076c87c JB |
2209 | purposes. The mark saves a location for the user's convenience. |
2210 | Most editing commands should not alter the mark. | |
2211 | To remember a location for internal use in the Lisp program, | |
2212 | store it in a Lisp variable. Example: | |
2213 | ||
2214 | (let ((beg (point))) (forward-line 1) (delete-region beg (point)))." | |
2215 | ||
fcadf1c7 RS |
2216 | (if pos |
2217 | (progn | |
2218 | (setq mark-active t) | |
2219 | (run-hooks 'activate-mark-hook) | |
2220 | (set-marker (mark-marker) pos (current-buffer))) | |
24c22852 RS |
2221 | ;; Normally we never clear mark-active except in Transient Mark mode. |
2222 | ;; But when we actually clear out the mark value too, | |
2223 | ;; we must clear mark-active in any mode. | |
2224 | (setq mark-active nil) | |
2225 | (run-hooks 'deactivate-mark-hook) | |
2226 | (set-marker (mark-marker) nil))) | |
2076c87c JB |
2227 | |
2228 | (defvar mark-ring nil | |
e55e2267 | 2229 | "The list of former marks of the current buffer, most recent first.") |
2076c87c | 2230 | (make-variable-buffer-local 'mark-ring) |
e55e2267 | 2231 | (put 'mark-ring 'permanent-local t) |
2076c87c | 2232 | |
69c1dd37 RS |
2233 | (defcustom mark-ring-max 16 |
2234 | "*Maximum size of mark ring. Start discarding off end if gets this big." | |
2235 | :type 'integer | |
2236 | :group 'editing-basics) | |
2076c87c | 2237 | |
dc029f0b RM |
2238 | (defvar global-mark-ring nil |
2239 | "The list of saved global marks, most recent first.") | |
2240 | ||
69c1dd37 | 2241 | (defcustom global-mark-ring-max 16 |
dc029f0b | 2242 | "*Maximum size of global mark ring. \ |
69c1dd37 RS |
2243 | Start discarding off end if gets this big." |
2244 | :type 'integer | |
2245 | :group 'editing-basics) | |
dc029f0b | 2246 | |
2076c87c JB |
2247 | (defun set-mark-command (arg) |
2248 | "Set mark at where point is, or jump to mark. | |
dc029f0b RM |
2249 | With no prefix argument, set mark, push old mark position on local mark |
2250 | ring, and push mark on global mark ring. | |
2251 | With argument, jump to mark, and pop a new position for mark off the ring | |
2252 | \(does not affect global mark ring\). | |
2076c87c | 2253 | |
ff1fbe3e | 2254 | Novice Emacs Lisp programmers often try to use the mark for the wrong |
2076c87c JB |
2255 | purposes. See the documentation of `set-mark' for more information." |
2256 | (interactive "P") | |
2257 | (if (null arg) | |
9a1277dd | 2258 | (progn |
fd0f4056 | 2259 | (push-mark nil nil t)) |
af39530e | 2260 | (if (null (mark t)) |
2076c87c | 2261 | (error "No mark set in this buffer") |
9a1277dd | 2262 | (goto-char (mark t)) |
2076c87c JB |
2263 | (pop-mark)))) |
2264 | ||
fd0f4056 | 2265 | (defun push-mark (&optional location nomsg activate) |
2076c87c | 2266 | "Set mark at LOCATION (point, by default) and push old mark on mark ring. |
f1382a3d RM |
2267 | If the last global mark pushed was not in the current buffer, |
2268 | also push LOCATION on the global mark ring. | |
fd0f4056 | 2269 | Display `Mark set' unless the optional second arg NOMSG is non-nil. |
8cdc660f | 2270 | In Transient Mark mode, activate mark if optional third arg ACTIVATE non-nil. |
2076c87c | 2271 | |
ff1fbe3e | 2272 | Novice Emacs Lisp programmers often try to use the mark for the wrong |
9a1277dd RS |
2273 | purposes. See the documentation of `set-mark' for more information. |
2274 | ||
2275 | In Transient Mark mode, this does not activate the mark." | |
af39530e | 2276 | (if (null (mark t)) |
2076c87c JB |
2277 | nil |
2278 | (setq mark-ring (cons (copy-marker (mark-marker)) mark-ring)) | |
2279 | (if (> (length mark-ring) mark-ring-max) | |
2280 | (progn | |
2281 | (move-marker (car (nthcdr mark-ring-max mark-ring)) nil) | |
2282 | (setcdr (nthcdr (1- mark-ring-max) mark-ring) nil)))) | |
9a1277dd | 2283 | (set-marker (mark-marker) (or location (point)) (current-buffer)) |
dc029f0b | 2284 | ;; Now push the mark on the global mark ring. |
f1382a3d | 2285 | (if (and global-mark-ring |
e08d3f7c | 2286 | (eq (marker-buffer (car global-mark-ring)) (current-buffer))) |
f1382a3d RM |
2287 | ;; The last global mark pushed was in this same buffer. |
2288 | ;; Don't push another one. | |
2289 | nil | |
2290 | (setq global-mark-ring (cons (copy-marker (mark-marker)) global-mark-ring)) | |
dc029f0b RM |
2291 | (if (> (length global-mark-ring) global-mark-ring-max) |
2292 | (progn | |
2293 | (move-marker (car (nthcdr global-mark-ring-max global-mark-ring)) | |
2294 | nil) | |
f1382a3d | 2295 | (setcdr (nthcdr (1- global-mark-ring-max) global-mark-ring) nil)))) |
efcf38c7 | 2296 | (or nomsg executing-kbd-macro (> (minibuffer-depth) 0) |
2076c87c | 2297 | (message "Mark set")) |
8cdc660f RS |
2298 | (if (or activate (not transient-mark-mode)) |
2299 | (set-mark (mark t))) | |
2076c87c JB |
2300 | nil) |
2301 | ||
2302 | (defun pop-mark () | |
2303 | "Pop off mark ring into the buffer's actual mark. | |
2304 | Does not set point. Does nothing if mark ring is empty." | |
2305 | (if mark-ring | |
2306 | (progn | |
2307 | (setq mark-ring (nconc mark-ring (list (copy-marker (mark-marker))))) | |
9a1277dd | 2308 | (set-marker (mark-marker) (+ 0 (car mark-ring)) (current-buffer)) |
19d35374 | 2309 | (deactivate-mark) |
2076c87c | 2310 | (move-marker (car mark-ring) nil) |
9a1277dd | 2311 | (if (null (mark t)) (ding)) |
2076c87c JB |
2312 | (setq mark-ring (cdr mark-ring))))) |
2313 | ||
e462e42f | 2314 | (defalias 'exchange-dot-and-mark 'exchange-point-and-mark) |
2076c87c | 2315 | (defun exchange-point-and-mark () |
af39530e RS |
2316 | "Put the mark where point is now, and point where the mark is now. |
2317 | This command works even when the mark is not active, | |
2318 | and it reactivates the mark." | |
2076c87c | 2319 | (interactive nil) |
af39530e | 2320 | (let ((omark (mark t))) |
2076c87c JB |
2321 | (if (null omark) |
2322 | (error "No mark set in this buffer")) | |
2323 | (set-mark (point)) | |
2324 | (goto-char omark) | |
2325 | nil)) | |
e23c2c21 | 2326 | |
22c3935a | 2327 | (defun transient-mark-mode (arg) |
e23c2c21 | 2328 | "Toggle Transient Mark mode. |
b411b5fa | 2329 | With arg, turn Transient Mark mode on if arg is positive, off otherwise. |
e23c2c21 | 2330 | |
5dd1220d RS |
2331 | In Transient Mark mode, when the mark is active, the region is highlighted. |
2332 | Changing the buffer \"deactivates\" the mark. | |
2333 | So do certain other operations that set the mark | |
2334 | but whose main purpose is something else--for example, | |
2335 | incremental search, \\[beginning-of-buffer], and \\[end-of-buffer]." | |
22c3935a | 2336 | (interactive "P") |
e23c2c21 RS |
2337 | (setq transient-mark-mode |
2338 | (if (null arg) | |
2339 | (not transient-mark-mode) | |
2c5d387c | 2340 | (> (prefix-numeric-value arg) 0))) |
22c3935a RS |
2341 | (if (interactive-p) |
2342 | (if transient-mark-mode | |
2343 | (message "Transient Mark mode enabled") | |
2344 | (message "Transient Mark mode disabled")))) | |
dc029f0b RM |
2345 | |
2346 | (defun pop-global-mark () | |
2347 | "Pop off global mark ring and jump to the top location." | |
2348 | (interactive) | |
52b6d445 RS |
2349 | ;; Pop entries which refer to non-existent buffers. |
2350 | (while (and global-mark-ring (not (marker-buffer (car global-mark-ring)))) | |
2351 | (setq global-mark-ring (cdr global-mark-ring))) | |
dc029f0b RM |
2352 | (or global-mark-ring |
2353 | (error "No global mark set")) | |
2354 | (let* ((marker (car global-mark-ring)) | |
2355 | (buffer (marker-buffer marker)) | |
2356 | (position (marker-position marker))) | |
34c31301 RS |
2357 | (setq global-mark-ring (nconc (cdr global-mark-ring) |
2358 | (list (car global-mark-ring)))) | |
dc029f0b RM |
2359 | (set-buffer buffer) |
2360 | (or (and (>= position (point-min)) | |
2361 | (<= position (point-max))) | |
2362 | (widen)) | |
2363 | (goto-char position) | |
2364 | (switch-to-buffer buffer))) | |
eaae8106 | 2365 | |
95791033 | 2366 | (defcustom next-line-add-newlines nil |
69c1dd37 RS |
2367 | "*If non-nil, `next-line' inserts newline to avoid `end of buffer' error." |
2368 | :type 'boolean | |
2369 | :group 'editing-basics) | |
38ebcf29 | 2370 | |
2076c87c JB |
2371 | (defun next-line (arg) |
2372 | "Move cursor vertically down ARG lines. | |
2373 | If there is no character in the target line exactly under the current column, | |
2374 | the cursor is positioned after the character in that line which spans this | |
2375 | column, or at the end of the line if it is not long enough. | |
38ebcf29 | 2376 | If there is no line in the buffer after this one, behavior depends on the |
1a2c3941 RS |
2377 | value of `next-line-add-newlines'. If non-nil, it inserts a newline character |
2378 | to create a line, and moves the cursor to that line. Otherwise it moves the | |
e47d38f6 | 2379 | cursor to the end of the buffer. |
2076c87c JB |
2380 | |
2381 | The command \\[set-goal-column] can be used to create | |
85969cb1 RS |
2382 | a semipermanent goal column for this command. |
2383 | Then instead of trying to move exactly vertically (or as close as possible), | |
2384 | this command moves to the specified goal column (or as close as possible). | |
2385 | The goal column is stored in the variable `goal-column', which is nil | |
2386 | when there is no goal column. | |
2076c87c JB |
2387 | |
2388 | If you are thinking of using this in a Lisp program, consider | |
2389 | using `forward-line' instead. It is usually easier to use | |
2390 | and more reliable (no dependence on goal column, etc.)." | |
2391 | (interactive "p") | |
028922cf RS |
2392 | (if (and next-line-add-newlines (= arg 1)) |
2393 | (let ((opoint (point))) | |
3534a809 RS |
2394 | (end-of-line) |
2395 | (if (eobp) | |
28191e20 | 2396 | (newline 1) |
028922cf RS |
2397 | (goto-char opoint) |
2398 | (line-move arg))) | |
1a2c3941 RS |
2399 | (if (interactive-p) |
2400 | (condition-case nil | |
2401 | (line-move arg) | |
2402 | ((beginning-of-buffer end-of-buffer) (ding))) | |
2403 | (line-move arg))) | |
2076c87c JB |
2404 | nil) |
2405 | ||
2406 | (defun previous-line (arg) | |
2407 | "Move cursor vertically up ARG lines. | |
2408 | If there is no character in the target line exactly over the current column, | |
2409 | the cursor is positioned after the character in that line which spans this | |
2410 | column, or at the end of the line if it is not long enough. | |
2411 | ||
2412 | The command \\[set-goal-column] can be used to create | |
85969cb1 RS |
2413 | a semipermanent goal column for this command. |
2414 | Then instead of trying to move exactly vertically (or as close as possible), | |
2415 | this command moves to the specified goal column (or as close as possible). | |
2416 | The goal column is stored in the variable `goal-column', which is nil | |
2417 | when there is no goal column. | |
2076c87c JB |
2418 | |
2419 | If you are thinking of using this in a Lisp program, consider using | |
c2e8a012 | 2420 | `forward-line' with a negative argument instead. It is usually easier |
2076c87c JB |
2421 | to use and more reliable (no dependence on goal column, etc.)." |
2422 | (interactive "p") | |
1a2c3941 RS |
2423 | (if (interactive-p) |
2424 | (condition-case nil | |
2425 | (line-move (- arg)) | |
2426 | ((beginning-of-buffer end-of-buffer) (ding))) | |
2427 | (line-move (- arg))) | |
2076c87c | 2428 | nil) |
eaae8106 | 2429 | |
69c1dd37 | 2430 | (defcustom track-eol nil |
2076c87c JB |
2431 | "*Non-nil means vertical motion starting at end of line keeps to ends of lines. |
2432 | This means moving to the end of each line moved onto. | |
69c1dd37 RS |
2433 | The beginning of a blank line does not count as the end of a line." |
2434 | :type 'boolean | |
2435 | :group 'editing-basics) | |
2436 | ||
2437 | (defcustom goal-column nil | |
2438 | "*Semipermanent goal column for vertical motion, as set by \\[set-goal-column], or nil." | |
2439 | :type '(choice integer | |
2440 | (const :tag "None" nil)) | |
2441 | :group 'editing-basics) | |
912c6728 | 2442 | (make-variable-buffer-local 'goal-column) |
2076c87c JB |
2443 | |
2444 | (defvar temporary-goal-column 0 | |
2445 | "Current goal column for vertical motion. | |
2446 | It is the column where point was | |
2447 | at the start of current run of vertical motion commands. | |
c637ae6f | 2448 | When the `track-eol' feature is doing its job, the value is 9999.") |
2076c87c | 2449 | |
69c1dd37 | 2450 | (defcustom line-move-ignore-invisible nil |
098fc1fb | 2451 | "*Non-nil means \\[next-line] and \\[previous-line] ignore invisible lines. |
69c1dd37 RS |
2452 | Outline mode sets this." |
2453 | :type 'boolean | |
2454 | :group 'editing-basics) | |
098fc1fb | 2455 | |
8c745744 RS |
2456 | ;; This is the guts of next-line and previous-line. |
2457 | ;; Arg says how many lines to move. | |
2076c87c | 2458 | (defun line-move (arg) |
2596511d RS |
2459 | ;; Don't run any point-motion hooks, and disregard intangibility, |
2460 | ;; for intermediate positions. | |
2461 | (let ((inhibit-point-motion-hooks t) | |
2462 | (opoint (point)) | |
6c8499b9 | 2463 | new line-end line-beg) |
2596511d RS |
2464 | (unwind-protect |
2465 | (progn | |
2466 | (if (not (or (eq last-command 'next-line) | |
2467 | (eq last-command 'previous-line))) | |
2468 | (setq temporary-goal-column | |
2469 | (if (and track-eol (eolp) | |
2470 | ;; Don't count beg of empty line as end of line | |
2471 | ;; unless we just did explicit end-of-line. | |
2472 | (or (not (bolp)) (eq last-command 'end-of-line))) | |
2473 | 9999 | |
2474 | (current-column)))) | |
2475 | (if (and (not (integerp selective-display)) | |
2476 | (not line-move-ignore-invisible)) | |
2477 | ;; Use just newline characters. | |
2478 | (or (if (> arg 0) | |
2479 | (progn (if (> arg 1) (forward-line (1- arg))) | |
2480 | ;; This way of moving forward ARG lines | |
2481 | ;; verifies that we have a newline after the last one. | |
2482 | ;; It doesn't get confused by intangible text. | |
2483 | (end-of-line) | |
2484 | (zerop (forward-line 1))) | |
2485 | (and (zerop (forward-line arg)) | |
2486 | (bolp))) | |
2487 | (signal (if (< arg 0) | |
2488 | 'beginning-of-buffer | |
2489 | 'end-of-buffer) | |
2490 | nil)) | |
2491 | ;; Move by arg lines, but ignore invisible ones. | |
2492 | (while (> arg 0) | |
2493 | (end-of-line) | |
2494 | (and (zerop (vertical-motion 1)) | |
2495 | (signal 'end-of-buffer nil)) | |
2496 | ;; If the following character is currently invisible, | |
2497 | ;; skip all characters with that same `invisible' property value. | |
2498 | (while (and (not (eobp)) | |
2499 | (let ((prop | |
2500 | (get-char-property (point) 'invisible))) | |
2501 | (if (eq buffer-invisibility-spec t) | |
2502 | prop | |
2503 | (or (memq prop buffer-invisibility-spec) | |
2504 | (assq prop buffer-invisibility-spec))))) | |
2505 | (if (get-text-property (point) 'invisible) | |
2506 | (goto-char (next-single-property-change (point) 'invisible)) | |
2507 | (goto-char (next-overlay-change (point))))) | |
2508 | (setq arg (1- arg))) | |
2509 | (while (< arg 0) | |
2510 | (beginning-of-line) | |
2511 | (and (zerop (vertical-motion -1)) | |
2512 | (signal 'beginning-of-buffer nil)) | |
2513 | (while (and (not (bobp)) | |
2514 | (let ((prop | |
2515 | (get-char-property (1- (point)) 'invisible))) | |
2516 | (if (eq buffer-invisibility-spec t) | |
2517 | prop | |
2518 | (or (memq prop buffer-invisibility-spec) | |
2519 | (assq prop buffer-invisibility-spec))))) | |
2520 | (if (get-text-property (1- (point)) 'invisible) | |
2521 | (goto-char (previous-single-property-change (point) 'invisible)) | |
2522 | (goto-char (previous-overlay-change (point))))) | |
2523 | (setq arg (1+ arg)))) | |
0565d307 RS |
2524 | (let ((buffer-invisibility-spec nil)) |
2525 | (move-to-column (or goal-column temporary-goal-column)))) | |
50be475d RS |
2526 | (setq new (point)) |
2527 | ;; If we are moving into some intangible text, | |
2528 | ;; look for following text on the same line which isn't intangible | |
2529 | ;; and move there. | |
6c8499b9 RS |
2530 | (setq line-end (save-excursion (end-of-line) (point))) |
2531 | (setq line-beg (save-excursion (beginning-of-line) (point))) | |
50be475d RS |
2532 | (let ((after (and (< new (point-max)) |
2533 | (get-char-property new 'intangible))) | |
2534 | (before (and (> new (point-min)) | |
6c8499b9 RS |
2535 | (get-char-property (1- new) 'intangible)))) |
2536 | (when (and before (eq before after) | |
2537 | (not (bolp))) | |
50be475d RS |
2538 | (goto-char (point-min)) |
2539 | (let ((inhibit-point-motion-hooks nil)) | |
2540 | (goto-char new)) | |
2541 | (if (<= new line-end) | |
2542 | (setq new (point))))) | |
6c8499b9 RS |
2543 | ;; NEW is where we want to move to. |
2544 | ;; LINE-BEG and LINE-END are the beginning and end of the line. | |
2545 | ;; Move there in just one step, from our starting position, | |
2546 | ;; with intangibility and point-motion hooks enabled this time. | |
2596511d RS |
2547 | (goto-char opoint) |
2548 | (setq inhibit-point-motion-hooks nil) | |
59b19d32 MB |
2549 | (goto-char (constrain-to-field new opoint nil t |
2550 | 'inhibit-line-move-field-capture)) | |
6c8499b9 RS |
2551 | ;; If intangibility processing moved us to a different line, |
2552 | ;; readjust the horizontal position within the line we ended up at. | |
2553 | (when (or (< (point) line-beg) (> (point) line-end)) | |
2554 | (setq new (point)) | |
2555 | (setq inhibit-point-motion-hooks t) | |
2556 | (setq line-end (save-excursion (end-of-line) (point))) | |
2557 | (beginning-of-line) | |
2558 | (setq line-beg (point)) | |
2559 | (let ((buffer-invisibility-spec nil)) | |
2560 | (move-to-column (or goal-column temporary-goal-column))) | |
2561 | (if (<= (point) line-end) | |
2562 | (setq new (point))) | |
2563 | (goto-char (point-min)) | |
2564 | (setq inhibit-point-motion-hooks nil) | |
59b19d32 MB |
2565 | (goto-char (constrain-to-field new opoint nil t |
2566 | 'inhibit-line-move-field-capture)) | |
6c8499b9 | 2567 | ))) |
2596511d | 2568 | nil) |
2076c87c | 2569 | |
d5ab2033 JB |
2570 | ;;; Many people have said they rarely use this feature, and often type |
2571 | ;;; it by accident. Maybe it shouldn't even be on a key. | |
2572 | (put 'set-goal-column 'disabled t) | |
2076c87c JB |
2573 | |
2574 | (defun set-goal-column (arg) | |
2575 | "Set the current horizontal position as a goal for \\[next-line] and \\[previous-line]. | |
2576 | Those commands will move to this position in the line moved to | |
2577 | rather than trying to keep the same horizontal position. | |
2578 | With a non-nil argument, clears out the goal column | |
912c6728 RS |
2579 | so that \\[next-line] and \\[previous-line] resume vertical motion. |
2580 | The goal column is stored in the variable `goal-column'." | |
2076c87c JB |
2581 | (interactive "P") |
2582 | (if arg | |
2583 | (progn | |
2584 | (setq goal-column nil) | |
2585 | (message "No goal column")) | |
2586 | (setq goal-column (current-column)) | |
2587 | (message (substitute-command-keys | |
2588 | "Goal column %d (use \\[set-goal-column] with an arg to unset it)") | |
2589 | goal-column)) | |
2590 | nil) | |
eaae8106 | 2591 | |
7492f5a6 RS |
2592 | |
2593 | (defun scroll-other-window-down (lines) | |
e47d38f6 RS |
2594 | "Scroll the \"other window\" down. |
2595 | For more details, see the documentation for `scroll-other-window'." | |
7492f5a6 RS |
2596 | (interactive "P") |
2597 | (scroll-other-window | |
2598 | ;; Just invert the argument's meaning. | |
2599 | ;; We can do that without knowing which window it will be. | |
2600 | (if (eq lines '-) nil | |
2601 | (if (null lines) '- | |
2602 | (- (prefix-numeric-value lines)))))) | |
e47d38f6 | 2603 | (define-key esc-map [?\C-\S-v] 'scroll-other-window-down) |
3aef9604 RS |
2604 | |
2605 | (defun beginning-of-buffer-other-window (arg) | |
2606 | "Move point to the beginning of the buffer in the other window. | |
2607 | Leave mark at previous position. | |
2608 | With arg N, put point N/10 of the way from the true beginning." | |
2609 | (interactive "P") | |
2610 | (let ((orig-window (selected-window)) | |
2611 | (window (other-window-for-scrolling))) | |
2612 | ;; We use unwind-protect rather than save-window-excursion | |
2613 | ;; because the latter would preserve the things we want to change. | |
2614 | (unwind-protect | |
2615 | (progn | |
2616 | (select-window window) | |
2617 | ;; Set point and mark in that window's buffer. | |
2618 | (beginning-of-buffer arg) | |
2619 | ;; Set point accordingly. | |
2620 | (recenter '(t))) | |
2621 | (select-window orig-window)))) | |
2622 | ||
2623 | (defun end-of-buffer-other-window (arg) | |
2624 | "Move point to the end of the buffer in the other window. | |
2625 | Leave mark at previous position. | |
2626 | With arg N, put point N/10 of the way from the true end." | |
2627 | (interactive "P") | |
2628 | ;; See beginning-of-buffer-other-window for comments. | |
2629 | (let ((orig-window (selected-window)) | |
2630 | (window (other-window-for-scrolling))) | |
2631 | (unwind-protect | |
2632 | (progn | |
2633 | (select-window window) | |
4500ff36 | 2634 | (end-of-buffer arg) |
3aef9604 RS |
2635 | (recenter '(t))) |
2636 | (select-window orig-window)))) | |
eaae8106 | 2637 | |
2076c87c JB |
2638 | (defun transpose-chars (arg) |
2639 | "Interchange characters around point, moving forward one character. | |
2640 | With prefix arg ARG, effect is to take character before point | |
2641 | and drag it forward past ARG other characters (backward if ARG negative). | |
2642 | If no argument and at end of line, the previous two chars are exchanged." | |
2643 | (interactive "*P") | |
2644 | (and (null arg) (eolp) (forward-char -1)) | |
2645 | (transpose-subr 'forward-char (prefix-numeric-value arg))) | |
2646 | ||
2647 | (defun transpose-words (arg) | |
2648 | "Interchange words around point, leaving point at end of them. | |
2649 | With prefix arg ARG, effect is to take word before or around point | |
2650 | and drag it forward past ARG other words (backward if ARG negative). | |
2651 | If ARG is zero, the words around or after point and around or after mark | |
2652 | are interchanged." | |
2653 | (interactive "*p") | |
2654 | (transpose-subr 'forward-word arg)) | |
2655 | ||
2656 | (defun transpose-sexps (arg) | |
2657 | "Like \\[transpose-words] but applies to sexps. | |
2658 | Does not work on a sexp that point is in the middle of | |
2659 | if it is a list or string." | |
2660 | (interactive "*p") | |
2661 | (transpose-subr 'forward-sexp arg)) | |
2662 | ||
2663 | (defun transpose-lines (arg) | |
2664 | "Exchange current line and previous line, leaving point after both. | |
2665 | With argument ARG, takes previous line and moves it past ARG lines. | |
2666 | With argument 0, interchanges line point is in with line mark is in." | |
2667 | (interactive "*p") | |
2668 | (transpose-subr (function | |
2669 | (lambda (arg) | |
d3f4ef3f | 2670 | (if (> arg 0) |
2076c87c | 2671 | (progn |
d3f4ef3f AS |
2672 | ;; Move forward over ARG lines, |
2673 | ;; but create newlines if necessary. | |
2674 | (setq arg (forward-line arg)) | |
2675 | (if (/= (preceding-char) ?\n) | |
2676 | (setq arg (1+ arg))) | |
2677 | (if (> arg 0) | |
2678 | (newline arg))) | |
2076c87c JB |
2679 | (forward-line arg)))) |
2680 | arg)) | |
2681 | ||
8b56e02d RS |
2682 | (defvar transpose-subr-start1) |
2683 | (defvar transpose-subr-start2) | |
2684 | (defvar transpose-subr-end1) | |
2685 | (defvar transpose-subr-end2) | |
2686 | ||
2076c87c | 2687 | (defun transpose-subr (mover arg) |
8b56e02d RS |
2688 | (let (transpose-subr-start1 |
2689 | transpose-subr-end1 | |
2690 | transpose-subr-start2 | |
2691 | transpose-subr-end2) | |
2076c87c JB |
2692 | (if (= arg 0) |
2693 | (progn | |
2694 | (save-excursion | |
2695 | (funcall mover 1) | |
8b56e02d | 2696 | (setq transpose-subr-end2 (point)) |
2076c87c | 2697 | (funcall mover -1) |
8b56e02d | 2698 | (setq transpose-subr-start2 (point)) |
2076c87c JB |
2699 | (goto-char (mark)) |
2700 | (funcall mover 1) | |
8b56e02d | 2701 | (setq transpose-subr-end1 (point)) |
2076c87c | 2702 | (funcall mover -1) |
8b56e02d | 2703 | (setq transpose-subr-start1 (point)) |
2076c87c | 2704 | (transpose-subr-1)) |
d3f4ef3f AS |
2705 | (exchange-point-and-mark)) |
2706 | (if (> arg 0) | |
2707 | (progn | |
2708 | (funcall mover -1) | |
8b56e02d | 2709 | (setq transpose-subr-start1 (point)) |
d3f4ef3f | 2710 | (funcall mover 1) |
8b56e02d | 2711 | (setq transpose-subr-end1 (point)) |
d3f4ef3f | 2712 | (funcall mover arg) |
8b56e02d | 2713 | (setq transpose-subr-end2 (point)) |
d3f4ef3f | 2714 | (funcall mover (- arg)) |
8b56e02d | 2715 | (setq transpose-subr-start2 (point)) |
d3f4ef3f | 2716 | (transpose-subr-1) |
8b56e02d | 2717 | (goto-char transpose-subr-end2)) |
d3f4ef3f | 2718 | (funcall mover -1) |
8b56e02d | 2719 | (setq transpose-subr-start2 (point)) |
d3f4ef3f | 2720 | (funcall mover 1) |
8b56e02d | 2721 | (setq transpose-subr-end2 (point)) |
d3f4ef3f | 2722 | (funcall mover (1- arg)) |
8b56e02d | 2723 | (setq transpose-subr-start1 (point)) |
d3f4ef3f | 2724 | (funcall mover (- arg)) |
8b56e02d | 2725 | (setq transpose-subr-end1 (point)) |
d3f4ef3f | 2726 | (transpose-subr-1))))) |
2076c87c JB |
2727 | |
2728 | (defun transpose-subr-1 () | |
8b56e02d RS |
2729 | (if (> (min transpose-subr-end1 transpose-subr-end2) |
2730 | (max transpose-subr-start1 transpose-subr-start2)) | |
2076c87c | 2731 | (error "Don't have two things to transpose")) |
8b56e02d | 2732 | (let* ((word1 (buffer-substring transpose-subr-start1 transpose-subr-end1)) |
d5d99b80 | 2733 | (len1 (length word1)) |
8b56e02d | 2734 | (word2 (buffer-substring transpose-subr-start2 transpose-subr-end2)) |
d5d99b80 | 2735 | (len2 (length word2))) |
8b56e02d RS |
2736 | (delete-region transpose-subr-start2 transpose-subr-end2) |
2737 | (goto-char transpose-subr-start2) | |
2076c87c | 2738 | (insert word1) |
8b56e02d RS |
2739 | (goto-char (if (< transpose-subr-start1 transpose-subr-start2) |
2740 | transpose-subr-start1 | |
2741 | (+ transpose-subr-start1 (- len1 len2)))) | |
d5d99b80 | 2742 | (delete-region (point) (+ (point) len1)) |
2076c87c | 2743 | (insert word2))) |
eaae8106 | 2744 | |
2076c87c JB |
2745 | (defun backward-word (arg) |
2746 | "Move backward until encountering the end of a word. | |
20ecc110 | 2747 | With argument, do this that many times." |
9e50756b | 2748 | (interactive "p") |
2076c87c JB |
2749 | (forward-word (- arg))) |
2750 | ||
2751 | (defun mark-word (arg) | |
2752 | "Set mark arg words away from point." | |
2753 | (interactive "p") | |
2754 | (push-mark | |
2755 | (save-excursion | |
2756 | (forward-word arg) | |
fd0f4056 RS |
2757 | (point)) |
2758 | nil t)) | |
2076c87c JB |
2759 | |
2760 | (defun kill-word (arg) | |
2761 | "Kill characters forward until encountering the end of a word. | |
2762 | With argument, do this that many times." | |
e761e42c | 2763 | (interactive "p") |
89ee2bf6 | 2764 | (kill-region (point) (progn (forward-word arg) (point)))) |
2076c87c JB |
2765 | |
2766 | (defun backward-kill-word (arg) | |
2767 | "Kill characters backward until encountering the end of a word. | |
2768 | With argument, do this that many times." | |
e761e42c | 2769 | (interactive "p") |
2076c87c | 2770 | (kill-word (- arg))) |
d7c64071 | 2771 | |
1e8c5ac4 RS |
2772 | (defun current-word (&optional strict) |
2773 | "Return the word point is on (or a nearby word) as a string. | |
2774 | If optional arg STRICT is non-nil, return nil unless point is within | |
2775 | or adjacent to a word." | |
d7c64071 ER |
2776 | (save-excursion |
2777 | (let ((oldpoint (point)) (start (point)) (end (point))) | |
2778 | (skip-syntax-backward "w_") (setq start (point)) | |
2779 | (goto-char oldpoint) | |
2780 | (skip-syntax-forward "w_") (setq end (point)) | |
2781 | (if (and (eq start oldpoint) (eq end oldpoint)) | |
1e8c5ac4 RS |
2782 | ;; Point is neither within nor adjacent to a word. |
2783 | (and (not strict) | |
2784 | (progn | |
2785 | ;; Look for preceding word in same line. | |
2786 | (skip-syntax-backward "^w_" | |
2787 | (save-excursion (beginning-of-line) | |
2788 | (point))) | |
2789 | (if (bolp) | |
2790 | ;; No preceding word in same line. | |
2791 | ;; Look for following word in same line. | |
2792 | (progn | |
2793 | (skip-syntax-forward "^w_" | |
2794 | (save-excursion (end-of-line) | |
2795 | (point))) | |
2796 | (setq start (point)) | |
2797 | (skip-syntax-forward "w_") | |
2798 | (setq end (point))) | |
2799 | (setq end (point)) | |
2800 | (skip-syntax-backward "w_") | |
2801 | (setq start (point))) | |
020db25f RS |
2802 | (buffer-substring-no-properties start end))) |
2803 | (buffer-substring-no-properties start end))))) | |
eaae8106 | 2804 | |
69c1dd37 | 2805 | (defcustom fill-prefix nil |
2076c87c | 2806 | "*String for filling to insert at front of new line, or nil for none. |
69c1dd37 RS |
2807 | Setting this variable automatically makes it local to the current buffer." |
2808 | :type '(choice (const :tag "None" nil) | |
2809 | string) | |
2810 | :group 'fill) | |
2076c87c JB |
2811 | (make-variable-buffer-local 'fill-prefix) |
2812 | ||
69c1dd37 RS |
2813 | (defcustom auto-fill-inhibit-regexp nil |
2814 | "*Regexp to match lines which should not be auto-filled." | |
2815 | :type '(choice (const :tag "None" nil) | |
2816 | regexp) | |
2817 | :group 'fill) | |
2076c87c | 2818 | |
58dd38f1 | 2819 | (defvar comment-line-break-function 'comment-indent-new-line |
b3ac9fa9 RS |
2820 | "*Mode-specific function which line breaks and continues a comment. |
2821 | ||
2822 | This function is only called during auto-filling of a comment section. | |
2823 | The function should take a single optional argument, which is a flag | |
2824 | indicating whether it should use soft newlines. | |
2825 | ||
2826 | Setting this variable automatically makes it local to the current buffer.") | |
2827 | ||
dbe524b6 | 2828 | ;; This function is used as the auto-fill-function of a buffer |
e2504204 KH |
2829 | ;; when Auto-Fill mode is enabled. |
2830 | ;; It returns t if it really did any work. | |
dbe524b6 RS |
2831 | ;; (Actually some major modes use a different auto-fill function, |
2832 | ;; but this one is the default one.) | |
2076c87c | 2833 | (defun do-auto-fill () |
a0170800 RS |
2834 | (let (fc justify bol give-up |
2835 | (fill-prefix fill-prefix)) | |
c18465c4 | 2836 | (if (or (not (setq justify (current-justification))) |
8f066a20 RS |
2837 | (null (setq fc (current-fill-column))) |
2838 | (and (eq justify 'left) | |
2839 | (<= (current-column) fc)) | |
1e722f9f | 2840 | (save-excursion (beginning-of-line) |
eed5698b RS |
2841 | (setq bol (point)) |
2842 | (and auto-fill-inhibit-regexp | |
2843 | (looking-at auto-fill-inhibit-regexp)))) | |
2844 | nil ;; Auto-filling not required | |
3db1e3b5 BG |
2845 | (if (memq justify '(full center right)) |
2846 | (save-excursion (unjustify-current-line))) | |
a0170800 RS |
2847 | |
2848 | ;; Choose a fill-prefix automatically. | |
2849 | (if (and adaptive-fill-mode | |
2850 | (or (null fill-prefix) (string= fill-prefix ""))) | |
e4b62d7c RS |
2851 | (let ((prefix |
2852 | (fill-context-prefix | |
2853 | (save-excursion (backward-paragraph 1) (point)) | |
50be475d | 2854 | (save-excursion (forward-paragraph 1) (point))))) |
e4b62d7c RS |
2855 | (and prefix (not (equal prefix "")) |
2856 | (setq fill-prefix prefix)))) | |
a0170800 | 2857 | |
eed5698b | 2858 | (while (and (not give-up) (> (current-column) fc)) |
e47d38f6 | 2859 | ;; Determine where to split the line. |
db893d00 RS |
2860 | (let* (after-prefix |
2861 | (fill-point | |
2862 | (let ((opoint (point)) | |
2863 | bounce | |
2864 | (first t)) | |
2865 | (save-excursion | |
2866 | (beginning-of-line) | |
2867 | (setq after-prefix (point)) | |
2868 | (and fill-prefix | |
2869 | (looking-at (regexp-quote fill-prefix)) | |
2870 | (setq after-prefix (match-end 0))) | |
2871 | (move-to-column (1+ fc)) | |
dbe524b6 RS |
2872 | ;; Move back to the point where we can break the line. |
2873 | ;; We break the line between word or | |
db893d00 RS |
2874 | ;; after/before the character which has character |
2875 | ;; category `|'. We search space, \c| followed by | |
dbe524b6 | 2876 | ;; a character, or \c| following a character. If |
db893d00 RS |
2877 | ;; not found, place the point at beginning of line. |
2878 | (while (or first | |
2879 | ;; If this is after period and a single space, | |
2880 | ;; move back once more--we don't want to break | |
2881 | ;; the line there and make it look like a | |
2882 | ;; sentence end. | |
2883 | (and (not (bobp)) | |
2884 | (not bounce) | |
2885 | sentence-end-double-space | |
2886 | (save-excursion (forward-char -1) | |
2887 | (and (looking-at "\\. ") | |
dbe524b6 RS |
2888 | (not (looking-at "\\. "))))) |
2889 | (and (not (bobp)) | |
2890 | (not bounce) | |
2891 | fill-nobreak-predicate | |
2892 | (funcall fill-nobreak-predicate))) | |
db893d00 RS |
2893 | (setq first nil) |
2894 | (re-search-backward "[ \t]\\|\\c|.\\|.\\c|\\|^") | |
2895 | ;; If we find nowhere on the line to break it, | |
2896 | ;; break after one word. Set bounce to t | |
2897 | ;; so we will not keep going in this while loop. | |
2898 | (if (<= (point) after-prefix) | |
2899 | (progn | |
2900 | (goto-char after-prefix) | |
2901 | (re-search-forward "[ \t]" opoint t) | |
2902 | (setq bounce t)) | |
2903 | (if (looking-at "[ \t]") | |
2904 | ;; Break the line at word boundary. | |
2905 | (skip-chars-backward " \t") | |
2906 | ;; Break the line after/before \c|. | |
2907 | (forward-char 1)))) | |
22c47bc5 | 2908 | (if enable-multibyte-characters |
eb400532 KH |
2909 | ;; If we are going to break the line after or |
2910 | ;; before a non-ascii character, we may have | |
2911 | ;; to run a special function for the charset | |
2912 | ;; of the character to find the correct break | |
2913 | ;; point. | |
2914 | (if (not (and (eq (charset-after (1- (point))) 'ascii) | |
2915 | (eq (charset-after (point)) 'ascii))) | |
2916 | (fill-find-break-point after-prefix))) | |
2917 | ||
db893d00 | 2918 | ;; Let fill-point be set to the place where we end up. |
4b9c8a06 RS |
2919 | ;; But move back before any whitespace here. |
2920 | (skip-chars-backward " \t") | |
db893d00 RS |
2921 | (point))))) |
2922 | ||
2923 | ;; See whether the place we found is any good. | |
e47d38f6 RS |
2924 | (if (save-excursion |
2925 | (goto-char fill-point) | |
07f458c1 | 2926 | (and (not (bolp)) |
db893d00 RS |
2927 | ;; There is no use breaking at end of line. |
2928 | (not (save-excursion (skip-chars-forward " ") (eolp))) | |
2929 | ;; It is futile to split at the end of the prefix | |
2930 | ;; since we would just insert the prefix again. | |
2931 | (not (and after-prefix (<= (point) after-prefix))) | |
07f458c1 RS |
2932 | ;; Don't split right after a comment starter |
2933 | ;; since we would just make another comment starter. | |
2934 | (not (and comment-start-skip | |
2935 | (let ((limit (point))) | |
2936 | (beginning-of-line) | |
2937 | (and (re-search-forward comment-start-skip | |
2938 | limit t) | |
2939 | (eq (point) limit))))))) | |
db893d00 | 2940 | ;; Ok, we have a useful place to break the line. Do it. |
e47d38f6 RS |
2941 | (let ((prev-column (current-column))) |
2942 | ;; If point is at the fill-point, do not `save-excursion'. | |
2943 | ;; Otherwise, if a comment prefix or fill-prefix is inserted, | |
2944 | ;; point will end up before it rather than after it. | |
2945 | (if (save-excursion | |
2946 | (skip-chars-backward " \t") | |
2947 | (= (point) fill-point)) | |
b3ac9fa9 | 2948 | (funcall comment-line-break-function t) |
e47d38f6 RS |
2949 | (save-excursion |
2950 | (goto-char fill-point) | |
b3ac9fa9 | 2951 | (funcall comment-line-break-function t))) |
e47d38f6 RS |
2952 | ;; Now do justification, if required |
2953 | (if (not (eq justify 'left)) | |
1e722f9f | 2954 | (save-excursion |
e47d38f6 RS |
2955 | (end-of-line 0) |
2956 | (justify-current-line justify nil t))) | |
2957 | ;; If making the new line didn't reduce the hpos of | |
2958 | ;; the end of the line, then give up now; | |
2959 | ;; trying again will not help. | |
2960 | (if (>= (current-column) prev-column) | |
2961 | (setq give-up t))) | |
db893d00 | 2962 | ;; No good place to break => stop trying. |
e47d38f6 | 2963 | (setq give-up t)))) |
24ebf92e | 2964 | ;; Justify last line. |
e2504204 | 2965 | (justify-current-line justify t t) |
1e722f9f | 2966 | t))) |
2076c87c | 2967 | |
24ebf92e RS |
2968 | (defvar normal-auto-fill-function 'do-auto-fill |
2969 | "The function to use for `auto-fill-function' if Auto Fill mode is turned on. | |
2970 | Some major modes set this.") | |
2971 | ||
d7465b15 | 2972 | (defun auto-fill-mode (&optional arg) |
24ebf92e RS |
2973 | "Toggle Auto Fill mode. |
2974 | With arg, turn Auto Fill mode on if and only if arg is positive. | |
2975 | In Auto Fill mode, inserting a space at a column beyond `current-fill-column' | |
2976 | automatically breaks the line at a previous space. | |
2977 | ||
2978 | The value of `normal-auto-fill-function' specifies the function to use | |
2979 | for `auto-fill-function' when turning Auto Fill mode on." | |
d7465b15 RS |
2980 | (interactive "P") |
2981 | (prog1 (setq auto-fill-function | |
2982 | (if (if (null arg) | |
2983 | (not auto-fill-function) | |
2984 | (> (prefix-numeric-value arg) 0)) | |
24ebf92e | 2985 | normal-auto-fill-function |
d7465b15 | 2986 | nil)) |
7911ecc8 | 2987 | (force-mode-line-update))) |
d7465b15 RS |
2988 | |
2989 | ;; This holds a document string used to document auto-fill-mode. | |
2990 | (defun auto-fill-function () | |
2991 | "Automatically break line at a previous space, in insertion of text." | |
2992 | nil) | |
2993 | ||
2994 | (defun turn-on-auto-fill () | |
2995 | "Unconditionally turn on Auto Fill mode." | |
2996 | (auto-fill-mode 1)) | |
3a99c819 GM |
2997 | |
2998 | (defun turn-off-auto-fill () | |
2999 | "Unconditionally turn off Auto Fill mode." | |
3000 | (auto-fill-mode -1)) | |
3001 | ||
7cbf1dc1 | 3002 | (custom-add-option 'text-mode-hook 'turn-on-auto-fill) |
d7465b15 RS |
3003 | |
3004 | (defun set-fill-column (arg) | |
4cc0ea11 | 3005 | "Set `fill-column' to specified argument. |
923efb99 | 3006 | Use \\[universal-argument] followed by a number to specify a column. |
4cc0ea11 | 3007 | Just \\[universal-argument] as argument means to use the current column." |
d7465b15 | 3008 | (interactive "P") |
f4520363 RS |
3009 | (if (consp arg) |
3010 | (setq arg (current-column))) | |
3011 | (if (not (integerp arg)) | |
3012 | ;; Disallow missing argument; it's probably a typo for C-x C-f. | |
3013 | (error "set-fill-column requires an explicit argument") | |
3014 | (message "Fill column set to %d (was %d)" arg fill-column) | |
3015 | (setq fill-column arg))) | |
eaae8106 | 3016 | |
2076c87c | 3017 | (defun set-selective-display (arg) |
ff1fbe3e RS |
3018 | "Set `selective-display' to ARG; clear it if no arg. |
3019 | When the value of `selective-display' is a number > 0, | |
3020 | lines whose indentation is >= that value are not displayed. | |
3021 | The variable `selective-display' has a separate value for each buffer." | |
2076c87c JB |
3022 | (interactive "P") |
3023 | (if (eq selective-display t) | |
3024 | (error "selective-display already in use for marked lines")) | |
c88ab9ce ER |
3025 | (let ((current-vpos |
3026 | (save-restriction | |
3027 | (narrow-to-region (point-min) (point)) | |
3028 | (goto-char (window-start)) | |
3029 | (vertical-motion (window-height))))) | |
3030 | (setq selective-display | |
3031 | (and arg (prefix-numeric-value arg))) | |
3032 | (recenter current-vpos)) | |
2076c87c JB |
3033 | (set-window-start (selected-window) (window-start (selected-window))) |
3034 | (princ "selective-display set to " t) | |
3035 | (prin1 selective-display t) | |
3036 | (princ "." t)) | |
3037 | ||
4f8f7f9f | 3038 | (defvar overwrite-mode-textual " Ovwrt" |
b6a22db0 | 3039 | "The string displayed in the mode line when in overwrite mode.") |
4f8f7f9f | 3040 | (defvar overwrite-mode-binary " Bin Ovwrt" |
b6a22db0 JB |
3041 | "The string displayed in the mode line when in binary overwrite mode.") |
3042 | ||
2076c87c JB |
3043 | (defun overwrite-mode (arg) |
3044 | "Toggle overwrite mode. | |
3045 | With arg, turn overwrite mode on iff arg is positive. | |
3046 | In overwrite mode, printing characters typed in replace existing text | |
b6a22db0 JB |
3047 | on a one-for-one basis, rather than pushing it to the right. At the |
3048 | end of a line, such characters extend the line. Before a tab, | |
3049 | such characters insert until the tab is filled in. | |
3050 | \\[quoted-insert] still inserts characters in overwrite mode; this | |
3051 | is supposed to make it easier to insert characters when necessary." | |
3052 | (interactive "P") | |
3053 | (setq overwrite-mode | |
3054 | (if (if (null arg) (not overwrite-mode) | |
3055 | (> (prefix-numeric-value arg) 0)) | |
3056 | 'overwrite-mode-textual)) | |
3057 | (force-mode-line-update)) | |
3058 | ||
3059 | (defun binary-overwrite-mode (arg) | |
3060 | "Toggle binary overwrite mode. | |
3061 | With arg, turn binary overwrite mode on iff arg is positive. | |
3062 | In binary overwrite mode, printing characters typed in replace | |
3063 | existing text. Newlines are not treated specially, so typing at the | |
3064 | end of a line joins the line to the next, with the typed character | |
3065 | between them. Typing before a tab character simply replaces the tab | |
3066 | with the character typed. | |
3067 | \\[quoted-insert] replaces the text at the cursor, just as ordinary | |
3068 | typing characters do. | |
3069 | ||
3070 | Note that binary overwrite mode is not its own minor mode; it is a | |
3071 | specialization of overwrite-mode, entered by setting the | |
3072 | `overwrite-mode' variable to `overwrite-mode-binary'." | |
2076c87c JB |
3073 | (interactive "P") |
3074 | (setq overwrite-mode | |
b6a22db0 | 3075 | (if (if (null arg) |
a61099dd | 3076 | (not (eq overwrite-mode 'overwrite-mode-binary)) |
b6a22db0 JB |
3077 | (> (prefix-numeric-value arg) 0)) |
3078 | 'overwrite-mode-binary)) | |
3079 | (force-mode-line-update)) | |
eaae8106 | 3080 | |
69c1dd37 RS |
3081 | (defcustom line-number-mode t |
3082 | "*Non-nil means display line number in mode line." | |
3083 | :type 'boolean | |
3084 | :group 'editing-basics) | |
a61099dd RS |
3085 | |
3086 | (defun line-number-mode (arg) | |
3087 | "Toggle Line Number mode. | |
3088 | With arg, turn Line Number mode on iff arg is positive. | |
3089 | When Line Number mode is enabled, the line number appears | |
8dc9e2ef KH |
3090 | in the mode line. |
3091 | ||
3092 | Line numbers do not appear for very large buffers, see variable | |
3093 | `line-number-display-limit'." | |
a61099dd RS |
3094 | (interactive "P") |
3095 | (setq line-number-mode | |
3096 | (if (null arg) (not line-number-mode) | |
3097 | (> (prefix-numeric-value arg) 0))) | |
3098 | (force-mode-line-update)) | |
3099 | ||
69c1dd37 RS |
3100 | (defcustom column-number-mode nil |
3101 | "*Non-nil means display column number in mode line." | |
3102 | :type 'boolean | |
3103 | :group 'editing-basics) | |
bcad4985 KH |
3104 | |
3105 | (defun column-number-mode (arg) | |
3106 | "Toggle Column Number mode. | |
3107 | With arg, turn Column Number mode on iff arg is positive. | |
3108 | When Column Number mode is enabled, the column number appears | |
3109 | in the mode line." | |
3110 | (interactive "P") | |
3111 | (setq column-number-mode | |
3112 | (if (null arg) (not column-number-mode) | |
3113 | (> (prefix-numeric-value arg) 0))) | |
3114 | (force-mode-line-update)) | |
3115 | ||
4b384a8f | 3116 | (defgroup paren-blinking nil |
020db25f | 3117 | "Blinking matching of parens and expressions." |
4b384a8f SM |
3118 | :prefix "blink-matching-" |
3119 | :group 'paren-matching) | |
3120 | ||
69c1dd37 RS |
3121 | (defcustom blink-matching-paren t |
3122 | "*Non-nil means show matching open-paren when close-paren is inserted." | |
3123 | :type 'boolean | |
4b384a8f | 3124 | :group 'paren-blinking) |
2076c87c | 3125 | |
69c1dd37 | 3126 | (defcustom blink-matching-paren-on-screen t |
29fc44dd | 3127 | "*Non-nil means show matching open-paren when it is on screen. |
4b384a8f SM |
3128 | If nil, means don't show it (but the open-paren can still be shown |
3129 | when it is off screen)." | |
69c1dd37 | 3130 | :type 'boolean |
4b384a8f | 3131 | :group 'paren-blinking) |
29fc44dd | 3132 | |
4b384a8f | 3133 | (defcustom blink-matching-paren-distance (* 25 1024) |
69c1dd37 RS |
3134 | "*If non-nil, is maximum distance to search for matching open-paren." |
3135 | :type 'integer | |
4b384a8f | 3136 | :group 'paren-blinking) |
2076c87c | 3137 | |
69c1dd37 | 3138 | (defcustom blink-matching-delay 1 |
4b384a8f SM |
3139 | "*Time in seconds to delay after showing a matching paren." |
3140 | :type 'number | |
3141 | :group 'paren-blinking) | |
72dddf8b | 3142 | |
69c1dd37 | 3143 | (defcustom blink-matching-paren-dont-ignore-comments nil |
4b384a8f | 3144 | "*Non-nil means `blink-matching-paren' will not ignore comments." |
69c1dd37 | 3145 | :type 'boolean |
4b384a8f | 3146 | :group 'paren-blinking) |
903b7f65 | 3147 | |
2076c87c JB |
3148 | (defun blink-matching-open () |
3149 | "Move cursor momentarily to the beginning of the sexp before point." | |
3150 | (interactive) | |
3151 | (and (> (point) (1+ (point-min))) | |
2076c87c | 3152 | blink-matching-paren |
7e1ddd45 RS |
3153 | ;; Verify an even number of quoting characters precede the close. |
3154 | (= 1 (logand 1 (- (point) | |
3155 | (save-excursion | |
3156 | (forward-char -1) | |
3157 | (skip-syntax-backward "/\\") | |
3158 | (point))))) | |
2076c87c JB |
3159 | (let* ((oldpos (point)) |
3160 | (blinkpos) | |
3161 | (mismatch)) | |
3162 | (save-excursion | |
3163 | (save-restriction | |
3164 | (if blink-matching-paren-distance | |
3165 | (narrow-to-region (max (point-min) | |
3166 | (- (point) blink-matching-paren-distance)) | |
3167 | oldpos)) | |
3168 | (condition-case () | |
903b7f65 RS |
3169 | (let ((parse-sexp-ignore-comments |
3170 | (and parse-sexp-ignore-comments | |
3171 | (not blink-matching-paren-dont-ignore-comments)))) | |
3172 | (setq blinkpos (scan-sexps oldpos -1))) | |
2076c87c | 3173 | (error nil))) |
903b7f65 RS |
3174 | (and blinkpos |
3175 | (/= (char-syntax (char-after blinkpos)) | |
3176 | ?\$) | |
2076c87c | 3177 | (setq mismatch |
903b7f65 RS |
3178 | (or (null (matching-paren (char-after blinkpos))) |
3179 | (/= (char-after (1- oldpos)) | |
3180 | (matching-paren (char-after blinkpos)))))) | |
2076c87c JB |
3181 | (if mismatch (setq blinkpos nil)) |
3182 | (if blinkpos | |
a117eaee KH |
3183 | ;; Don't log messages about paren matching. |
3184 | (let (message-log-max) | |
2076c87c JB |
3185 | (goto-char blinkpos) |
3186 | (if (pos-visible-in-window-p) | |
29fc44dd KH |
3187 | (and blink-matching-paren-on-screen |
3188 | (sit-for blink-matching-delay)) | |
2076c87c JB |
3189 | (goto-char blinkpos) |
3190 | (message | |
3191 | "Matches %s" | |
e9f1d66d | 3192 | ;; Show what precedes the open in its line, if anything. |
2076c87c JB |
3193 | (if (save-excursion |
3194 | (skip-chars-backward " \t") | |
3195 | (not (bolp))) | |
3196 | (buffer-substring (progn (beginning-of-line) (point)) | |
3197 | (1+ blinkpos)) | |
e9f1d66d RS |
3198 | ;; Show what follows the open in its line, if anything. |
3199 | (if (save-excursion | |
3200 | (forward-char 1) | |
3201 | (skip-chars-forward " \t") | |
3202 | (not (eolp))) | |
3203 | (buffer-substring blinkpos | |
3204 | (progn (end-of-line) (point))) | |
267935b9 RS |
3205 | ;; Otherwise show the previous nonblank line, |
3206 | ;; if there is one. | |
3207 | (if (save-excursion | |
3208 | (skip-chars-backward "\n \t") | |
3209 | (not (bobp))) | |
3210 | (concat | |
3211 | (buffer-substring (progn | |
3212 | (skip-chars-backward "\n \t") | |
3213 | (beginning-of-line) | |
3214 | (point)) | |
3215 | (progn (end-of-line) | |
3216 | (skip-chars-backward " \t") | |
3217 | (point))) | |
3218 | ;; Replace the newline and other whitespace with `...'. | |
3219 | "..." | |
3220 | (buffer-substring blinkpos (1+ blinkpos))) | |
3221 | ;; There is nothing to show except the char itself. | |
3222 | (buffer-substring blinkpos (1+ blinkpos)))))))) | |
2076c87c JB |
3223 | (cond (mismatch |
3224 | (message "Mismatched parentheses")) | |
3225 | ((not blink-matching-paren-distance) | |
3226 | (message "Unmatched parenthesis")))))))) | |
3227 | ||
3228 | ;Turned off because it makes dbx bomb out. | |
3229 | (setq blink-paren-function 'blink-matching-open) | |
3230 | ||
9a1277dd RS |
3231 | ;; This executes C-g typed while Emacs is waiting for a command. |
3232 | ;; Quitting out of a program does not go through here; | |
3233 | ;; that happens in the QUIT macro at the C code level. | |
2076c87c | 3234 | (defun keyboard-quit () |
d5dae4e1 | 3235 | "Signal a `quit' condition. |
af39530e RS |
3236 | During execution of Lisp code, this character causes a quit directly. |
3237 | At top-level, as an editor command, this simply beeps." | |
2076c87c | 3238 | (interactive) |
19d35374 | 3239 | (deactivate-mark) |
2076c87c JB |
3240 | (signal 'quit nil)) |
3241 | ||
3242 | (define-key global-map "\C-g" 'keyboard-quit) | |
c66587fe | 3243 | |
1c6c6fde RS |
3244 | (defvar buffer-quit-function nil |
3245 | "Function to call to \"quit\" the current buffer, or nil if none. | |
3246 | \\[keyboard-escape-quit] calls this function when its more local actions | |
3247 | \(such as cancelling a prefix argument, minibuffer or region) do not apply.") | |
3248 | ||
c66587fe RS |
3249 | (defun keyboard-escape-quit () |
3250 | "Exit the current \"mode\" (in a generalized sense of the word). | |
3251 | This command can exit an interactive command such as `query-replace', | |
3252 | can clear out a prefix argument or a region, | |
3253 | can get out of the minibuffer or other recursive edit, | |
1c6c6fde RS |
3254 | cancel the use of the current buffer (for special-purpose buffers), |
3255 | or go back to just one window (by deleting all but the selected window)." | |
c66587fe RS |
3256 | (interactive) |
3257 | (cond ((eq last-command 'mode-exited) nil) | |
3258 | ((> (minibuffer-depth) 0) | |
3259 | (abort-recursive-edit)) | |
3260 | (current-prefix-arg | |
3261 | nil) | |
3262 | ((and transient-mark-mode | |
3263 | mark-active) | |
3264 | (deactivate-mark)) | |
1b657835 RS |
3265 | ((> (recursion-depth) 0) |
3266 | (exit-recursive-edit)) | |
1c6c6fde RS |
3267 | (buffer-quit-function |
3268 | (funcall buffer-quit-function)) | |
c66587fe | 3269 | ((not (one-window-p t)) |
1b657835 RS |
3270 | (delete-other-windows)) |
3271 | ((string-match "^ \\*" (buffer-name (current-buffer))) | |
3272 | (bury-buffer)))) | |
c66587fe | 3273 | |
1c6c6fde | 3274 | (define-key global-map "\e\e\e" 'keyboard-escape-quit) |
22e4ec98 | 3275 | |
618bd252 DL |
3276 | (defcustom input-mode-8-bit t |
3277 | "Control acceptance of 8-bit keyboard input. | |
22e4ec98 | 3278 | This may be useful for inputting non-ASCII characters if your keyboard |
618bd252 DL |
3279 | can generate them. It is not necessary to change this under a window |
3280 | system which can distinguish 8-bit characters and Meta keys. | |
22e4ec98 DL |
3281 | Setting this variable directly does not take effect; |
3282 | use either M-x customize or the function `set-input-mode'." | |
3283 | :set (lambda (symbol value) | |
3284 | (let ((mode (current-input-mode))) | |
3285 | (set-input-mode (nth 0 mode) (nth 1 mode) value))) | |
3286 | :initialize 'custom-initialize-default | |
618bd252 DL |
3287 | :type '(choice (const :tag "8-bit input for a Meta key" t) |
3288 | (const :tag "Direct 8-bit character input" 0) | |
3289 | (const :tag "Assume top bit is parity and ignore" nil)) | |
22e4ec98 DL |
3290 | :version "21.1" |
3291 | :link '(custom-manual "Single-Byte European Support") | |
3292 | :group 'keyboard) | |
eaae8106 | 3293 | |
7683b5c2 DL |
3294 | (defcustom read-mail-command 'rmail |
3295 | "*Your preference for a mail reading package. | |
9023837e DL |
3296 | This is used by some keybindings which support reading mail. |
3297 | See also `mail-user-agent' concerning sending mail." | |
7683b5c2 DL |
3298 | :type '(choice (function-item rmail) |
3299 | (function-item gnus) | |
3300 | (function-item mh-rmail) | |
3301 | (function :tag "Other")) | |
3302 | :version "21.1" | |
3303 | :group 'mail) | |
3304 | ||
69c1dd37 | 3305 | (defcustom mail-user-agent 'sendmail-user-agent |
a31ca314 | 3306 | "*Your preference for a mail composition package. |
9023837e | 3307 | Various Emacs Lisp packages (e.g. Reporter) require you to compose an |
a31ca314 RS |
3308 | outgoing email message. This variable lets you specify which |
3309 | mail-sending package you prefer. | |
3310 | ||
3311 | Valid values include: | |
3312 | ||
9023837e DL |
3313 | `sendmail-user-agent' -- use the default Emacs Mail package. |
3314 | See Info node `(emacs)Sending Mail'. | |
3315 | `mh-e-user-agent' -- use the Emacs interface to the MH mail system. | |
3316 | See Info node `(mh-e)'. | |
3317 | `message-user-agent' -- use the Gnus Message package. | |
3318 | See Info node `(message)'. | |
3319 | `gnus-user-agent' -- like `message-user-agent', but with Gnus | |
3320 | paraphernalia, particularly the Gcc: header for | |
3321 | archiving. | |
a31ca314 RS |
3322 | |
3323 | Additional valid symbols may be available; check with the author of | |
9023837e DL |
3324 | your package for details. |
3325 | ||
3326 | See also `read-mail-command' concerning reading mail." | |
69c1dd37 RS |
3327 | :type '(radio (function-item :tag "Default Emacs mail" |
3328 | :format "%t\n" | |
3329 | sendmail-user-agent) | |
3330 | (function-item :tag "Emacs interface to MH" | |
3331 | :format "%t\n" | |
3332 | mh-e-user-agent) | |
9023837e | 3333 | (function-item :tag "Gnus Message package" |
69c1dd37 RS |
3334 | :format "%t\n" |
3335 | message-user-agent) | |
9023837e DL |
3336 | (function-item :tag "Gnus Message with full Gnus features" |
3337 | :format "%t\n" | |
3338 | gnus-user-agent) | |
69c1dd37 RS |
3339 | (function :tag "Other")) |
3340 | :group 'mail) | |
a31ca314 RS |
3341 | |
3342 | (defun define-mail-user-agent (symbol composefunc sendfunc | |
3343 | &optional abortfunc hookvar) | |
3344 | "Define a symbol to identify a mail-sending package for `mail-user-agent'. | |
3345 | ||
3346 | SYMBOL can be any Lisp symbol. Its function definition and/or | |
3347 | value as a variable do not matter for this usage; we use only certain | |
3348 | properties on its property list, to encode the rest of the arguments. | |
3349 | ||
3350 | COMPOSEFUNC is program callable function that composes an outgoing | |
3351 | mail message buffer. This function should set up the basics of the | |
3352 | buffer without requiring user interaction. It should populate the | |
3183b230 RS |
3353 | standard mail headers, leaving the `to:' and `subject:' headers blank |
3354 | by default. | |
a31ca314 | 3355 | |
d0008a00 RS |
3356 | COMPOSEFUNC should accept several optional arguments--the same |
3357 | arguments that `compose-mail' takes. See that function's documentation. | |
a31ca314 | 3358 | |
3183b230 RS |
3359 | SENDFUNC is the command a user would run to send the message. |
3360 | ||
3361 | Optional ABORTFUNC is the command a user would run to abort the | |
a31ca314 RS |
3362 | message. For mail packages that don't have a separate abort function, |
3363 | this can be `kill-buffer' (the equivalent of omitting this argument). | |
3364 | ||
3365 | Optional HOOKVAR is a hook variable that gets run before the message | |
3183b230 RS |
3366 | is actually sent. Callers that use the `mail-user-agent' may |
3367 | install a hook function temporarily on this hook variable. | |
3368 | If HOOKVAR is nil, `mail-send-hook' is used. | |
a31ca314 RS |
3369 | |
3370 | The properties used on SYMBOL are `composefunc', `sendfunc', | |
3371 | `abortfunc', and `hookvar'." | |
3372 | (put symbol 'composefunc composefunc) | |
3373 | (put symbol 'sendfunc sendfunc) | |
3374 | (put symbol 'abortfunc (or abortfunc 'kill-buffer)) | |
3375 | (put symbol 'hookvar (or hookvar 'mail-send-hook))) | |
3376 | ||
3377 | (define-mail-user-agent 'sendmail-user-agent | |
34fbcdf3 | 3378 | 'sendmail-user-agent-compose |
a31ca314 RS |
3379 | 'mail-send-and-exit) |
3380 | ||
360b5483 RS |
3381 | (defun rfc822-goto-eoh () |
3382 | ;; Go to header delimiter line in a mail message, following RFC822 rules | |
3383 | (goto-char (point-min)) | |
3384 | (while (looking-at "^[^: \n]+:\\|^[ \t]") | |
3385 | (forward-line 1)) | |
3386 | (point)) | |
3387 | ||
34fbcdf3 RS |
3388 | (defun sendmail-user-agent-compose (&optional to subject other-headers continue |
3389 | switch-function yank-action | |
3390 | send-actions) | |
3391 | (if switch-function | |
3392 | (let ((special-display-buffer-names nil) | |
3393 | (special-display-regexps nil) | |
3394 | (same-window-buffer-names nil) | |
3395 | (same-window-regexps nil)) | |
3396 | (funcall switch-function "*mail*"))) | |
3397 | (let ((cc (cdr (assoc-ignore-case "cc" other-headers))) | |
0740c738 GM |
3398 | (in-reply-to (cdr (assoc-ignore-case "in-reply-to" other-headers))) |
3399 | (body (cdr (assoc-ignore-case "body" other-headers)))) | |
34fbcdf3 RS |
3400 | (or (mail continue to subject in-reply-to cc yank-action send-actions) |
3401 | continue | |
3402 | (error "Message aborted")) | |
3403 | (save-excursion | |
360b5483 | 3404 | (rfc822-goto-eoh) |
34fbcdf3 | 3405 | (while other-headers |
0740c738 GM |
3406 | (unless (member-ignore-case (car (car other-headers)) |
3407 | '("in-reply-to" "cc" "body")) | |
34fbcdf3 RS |
3408 | (insert (car (car other-headers)) ": " |
3409 | (cdr (car other-headers)) "\n")) | |
3410 | (setq other-headers (cdr other-headers))) | |
0740c738 GM |
3411 | (when body |
3412 | (forward-line 1) | |
3413 | (insert body)) | |
34fbcdf3 RS |
3414 | t))) |
3415 | ||
a31ca314 RS |
3416 | (define-mail-user-agent 'mh-e-user-agent |
3417 | 'mh-smail-batch 'mh-send-letter 'mh-fully-kill-draft | |
3418 | 'mh-before-send-letter-hook) | |
d0008a00 RS |
3419 | |
3420 | (defun compose-mail (&optional to subject other-headers continue | |
3421 | switch-function yank-action send-actions) | |
3422 | "Start composing a mail message to send. | |
3423 | This uses the user's chosen mail composition package | |
3424 | as selected with the variable `mail-user-agent'. | |
3425 | The optional arguments TO and SUBJECT specify recipients | |
3426 | and the initial Subject field, respectively. | |
3427 | ||
3428 | OTHER-HEADERS is an alist specifying additional | |
3429 | header fields. Elements look like (HEADER . VALUE) where both | |
3430 | HEADER and VALUE are strings. | |
3431 | ||
3432 | CONTINUE, if non-nil, says to continue editing a message already | |
3433 | being composed. | |
3434 | ||
3435 | SWITCH-FUNCTION, if non-nil, is a function to use to | |
3436 | switch to and display the buffer used for mail composition. | |
3437 | ||
3438 | YANK-ACTION, if non-nil, is an action to perform, if and when necessary, | |
06720de2 RS |
3439 | to insert the raw text of the message being replied to. |
3440 | It has the form (FUNCTION . ARGS). The user agent will apply | |
3441 | FUNCTION to ARGS, to insert the raw text of the original message. | |
3442 | \(The user agent will also run `mail-citation-hook', *after* the | |
3443 | original text has been inserted in this way.) | |
d0008a00 RS |
3444 | |
3445 | SEND-ACTIONS is a list of actions to call when the message is sent. | |
3446 | Each action has the form (FUNCTION . ARGS)." | |
b5f019be RS |
3447 | (interactive |
3448 | (list nil nil nil current-prefix-arg)) | |
d0008a00 RS |
3449 | (let ((function (get mail-user-agent 'composefunc))) |
3450 | (funcall function to subject other-headers continue | |
3451 | switch-function yank-action send-actions))) | |
b5f019be RS |
3452 | |
3453 | (defun compose-mail-other-window (&optional to subject other-headers continue | |
3454 | yank-action send-actions) | |
3455 | "Like \\[compose-mail], but edit the outgoing message in another window." | |
3456 | (interactive | |
3457 | (list nil nil nil current-prefix-arg)) | |
3458 | (compose-mail to subject other-headers continue | |
3459 | 'switch-to-buffer-other-window yank-action send-actions)) | |
3460 | ||
3461 | ||
3462 | (defun compose-mail-other-frame (&optional to subject other-headers continue | |
3463 | yank-action send-actions) | |
3464 | "Like \\[compose-mail], but edit the outgoing message in another frame." | |
3465 | (interactive | |
3466 | (list nil nil nil current-prefix-arg)) | |
3467 | (compose-mail to subject other-headers continue | |
3468 | 'switch-to-buffer-other-frame yank-action send-actions)) | |
eaae8106 | 3469 | |
610c1c68 RS |
3470 | (defvar set-variable-value-history nil |
3471 | "History of values entered with `set-variable'.") | |
3472 | ||
3473 | (defun set-variable (var val) | |
3474 | "Set VARIABLE to VALUE. VALUE is a Lisp object. | |
3475 | When using this interactively, enter a Lisp object for VALUE. | |
3476 | If you want VALUE to be a string, you must surround it with doublequotes. | |
3477 | VALUE is used literally, not evaluated. | |
3478 | ||
3479 | If VARIABLE has a `variable-interactive' property, that is used as if | |
3480 | it were the arg to `interactive' (which see) to interactively read VALUE. | |
3481 | ||
3482 | If VARIABLE has been defined with `defcustom', then the type information | |
3483 | in the definition is used to check that VALUE is valid." | |
e9dfb72e RS |
3484 | (interactive |
3485 | (let* ((default-var (variable-at-point)) | |
3486 | (var (if (symbolp default-var) | |
3487 | (read-variable (format "Set variable (default %s): " default-var) | |
3488 | default-var) | |
3489 | (read-variable "Set variable: "))) | |
610c1c68 RS |
3490 | (minibuffer-help-form '(describe-variable var)) |
3491 | (prop (get var 'variable-interactive)) | |
3492 | (prompt (format "Set %s to value: " var)) | |
3493 | (val (if prop | |
3494 | ;; Use VAR's `variable-interactive' property | |
3495 | ;; as an interactive spec for prompting. | |
3496 | (call-interactively `(lambda (arg) | |
3497 | (interactive ,prop) | |
3498 | arg)) | |
3499 | (read | |
3500 | (read-string prompt nil | |
3501 | 'set-variable-value-history))))) | |
3502 | (list var val))) | |
3503 | ||
f8496faa | 3504 | (let ((type (get var 'custom-type))) |
610c1c68 RS |
3505 | (when type |
3506 | ;; Match with custom type. | |
3507 | (require 'wid-edit) | |
610c1c68 RS |
3508 | (setq type (widget-convert type)) |
3509 | (unless (widget-apply type :match val) | |
1e722f9f | 3510 | (error "Value `%S' does not match type %S of %S" |
610c1c68 RS |
3511 | val (car type) var)))) |
3512 | (set var val)) | |
eaae8106 | 3513 | |
e8a700bf RS |
3514 | ;; Define the major mode for lists of completions. |
3515 | ||
98b45886 RS |
3516 | (defvar completion-list-mode-map nil |
3517 | "Local map for completion list buffers.") | |
ac29eb79 | 3518 | (or completion-list-mode-map |
e8a700bf RS |
3519 | (let ((map (make-sparse-keymap))) |
3520 | (define-key map [mouse-2] 'mouse-choose-completion) | |
eaf76065 | 3521 | (define-key map [down-mouse-2] nil) |
80298193 | 3522 | (define-key map "\C-m" 'choose-completion) |
1c6c6fde | 3523 | (define-key map "\e\e\e" 'delete-completion-window) |
dde69dbe RS |
3524 | (define-key map [left] 'previous-completion) |
3525 | (define-key map [right] 'next-completion) | |
ac29eb79 | 3526 | (setq completion-list-mode-map map))) |
e8a700bf RS |
3527 | |
3528 | ;; Completion mode is suitable only for specially formatted data. | |
ac29eb79 | 3529 | (put 'completion-list-mode 'mode-class 'special) |
e8a700bf | 3530 | |
98b45886 RS |
3531 | (defvar completion-reference-buffer nil |
3532 | "Record the buffer that was current when the completion list was requested. | |
3533 | This is a local variable in the completion list buffer. | |
ec39964e | 3534 | Initial value is nil to avoid some compiler warnings.") |
3819736b | 3535 | |
83434bda RS |
3536 | (defvar completion-no-auto-exit nil |
3537 | "Non-nil means `choose-completion-string' should never exit the minibuffer. | |
3538 | This also applies to other functions such as `choose-completion' | |
3539 | and `mouse-choose-completion'.") | |
3540 | ||
98b45886 RS |
3541 | (defvar completion-base-size nil |
3542 | "Number of chars at beginning of minibuffer not involved in completion. | |
3543 | This is a local variable in the completion list buffer | |
3544 | but it talks about the buffer in `completion-reference-buffer'. | |
3545 | If this is nil, it means to compare text to determine which part | |
3546 | of the tail end of the buffer's text is involved in completion.") | |
f6b293e3 | 3547 | |
1c6c6fde RS |
3548 | (defun delete-completion-window () |
3549 | "Delete the completion list window. | |
3550 | Go to the window from which completion was requested." | |
3551 | (interactive) | |
3552 | (let ((buf completion-reference-buffer)) | |
ddb2b181 RS |
3553 | (if (one-window-p t) |
3554 | (if (window-dedicated-p (selected-window)) | |
3555 | (delete-frame (selected-frame))) | |
3556 | (delete-window (selected-window)) | |
3557 | (if (get-buffer-window buf) | |
3558 | (select-window (get-buffer-window buf)))))) | |
1c6c6fde | 3559 | |
dde69dbe RS |
3560 | (defun previous-completion (n) |
3561 | "Move to the previous item in the completion list." | |
3562 | (interactive "p") | |
3563 | (next-completion (- n))) | |
3564 | ||
3565 | (defun next-completion (n) | |
3566 | "Move to the next item in the completion list. | |
1f238ac2 | 3567 | With prefix argument N, move N items (negative N means move backward)." |
dde69dbe | 3568 | (interactive "p") |
58dd38f1 SM |
3569 | (let ((beg (point-min)) (end (point-max))) |
3570 | (while (and (> n 0) (not (eobp))) | |
dde69dbe | 3571 | ;; If in a completion, move to the end of it. |
58dd38f1 SM |
3572 | (when (get-text-property (point) 'mouse-face) |
3573 | (goto-char (next-single-property-change (point) 'mouse-face nil end))) | |
dde69dbe | 3574 | ;; Move to start of next one. |
58dd38f1 SM |
3575 | (unless (get-text-property (point) 'mouse-face) |
3576 | (goto-char (next-single-property-change (point) 'mouse-face nil end))) | |
3577 | (setq n (1- n))) | |
3578 | (while (and (< n 0) (not (bobp))) | |
3579 | (let ((prop (get-text-property (1- (point)) 'mouse-face))) | |
3580 | ;; If in a completion, move to the start of it. | |
3581 | (when (and prop (eq prop (get-text-property (point) 'mouse-face))) | |
b61a81c2 | 3582 | (goto-char (previous-single-property-change |
58dd38f1 SM |
3583 | (point) 'mouse-face nil beg))) |
3584 | ;; Move to end of the previous completion. | |
3585 | (unless (or (bobp) (get-text-property (1- (point)) 'mouse-face)) | |
3586 | (goto-char (previous-single-property-change | |
3587 | (point) 'mouse-face nil beg))) | |
3588 | ;; Move to the start of that one. | |
3589 | (goto-char (previous-single-property-change | |
3590 | (point) 'mouse-face nil beg)) | |
3591 | (setq n (1+ n)))))) | |
dde69dbe | 3592 | |
80298193 RS |
3593 | (defun choose-completion () |
3594 | "Choose the completion that point is in or next to." | |
3595 | (interactive) | |
f6b293e3 RS |
3596 | (let (beg end completion (buffer completion-reference-buffer) |
3597 | (base-size completion-base-size)) | |
6096f362 RS |
3598 | (if (and (not (eobp)) (get-text-property (point) 'mouse-face)) |
3599 | (setq end (point) beg (1+ (point)))) | |
3600 | (if (and (not (bobp)) (get-text-property (1- (point)) 'mouse-face)) | |
3f299281 | 3601 | (setq end (1- (point)) beg (point))) |
6096f362 RS |
3602 | (if (null beg) |
3603 | (error "No completion here")) | |
3604 | (setq beg (previous-single-property-change beg 'mouse-face)) | |
88dd3c24 | 3605 | (setq end (or (next-single-property-change end 'mouse-face) (point-max))) |
ab63960f RS |
3606 | (setq completion (buffer-substring beg end)) |
3607 | (let ((owindow (selected-window))) | |
3608 | (if (and (one-window-p t 'selected-frame) | |
3609 | (window-dedicated-p (selected-window))) | |
3610 | ;; This is a special buffer's frame | |
3611 | (iconify-frame (selected-frame)) | |
3612 | (or (window-dedicated-p (selected-window)) | |
3613 | (bury-buffer))) | |
3614 | (select-window owindow)) | |
f6b293e3 | 3615 | (choose-completion-string completion buffer base-size))) |
80298193 RS |
3616 | |
3617 | ;; Delete the longest partial match for STRING | |
3618 | ;; that can be found before POINT. | |
3619 | (defun choose-completion-delete-max-match (string) | |
3620 | (let ((opoint (point)) | |
3621 | (len (min (length string) | |
3622 | (- (point) (point-min))))) | |
3623 | (goto-char (- (point) (length string))) | |
61bbf6fe RS |
3624 | (if completion-ignore-case |
3625 | (setq string (downcase string))) | |
80298193 RS |
3626 | (while (and (> len 0) |
3627 | (let ((tail (buffer-substring (point) | |
3628 | (+ (point) len)))) | |
61bbf6fe RS |
3629 | (if completion-ignore-case |
3630 | (setq tail (downcase tail))) | |
80298193 RS |
3631 | (not (string= tail (substring string 0 len))))) |
3632 | (setq len (1- len)) | |
3633 | (forward-char 1)) | |
3634 | (delete-char len))) | |
3635 | ||
98b45886 RS |
3636 | ;; Switch to BUFFER and insert the completion choice CHOICE. |
3637 | ;; BASE-SIZE, if non-nil, says how many characters of BUFFER's text | |
3638 | ;; to keep. If it is nil, use choose-completion-delete-max-match instead. | |
74d0290b RS |
3639 | |
3640 | ;; If BUFFER is the minibuffer, exit the minibuffer | |
83434bda RS |
3641 | ;; unless it is reading a file name and CHOICE is a directory, |
3642 | ;; or completion-no-auto-exit is non-nil. | |
f6b293e3 | 3643 | (defun choose-completion-string (choice &optional buffer base-size) |
f436a90a RS |
3644 | (let ((buffer (or buffer completion-reference-buffer)) |
3645 | (mini-p (string-match "\\` \\*Minibuf-[0-9]+\\*\\'" (buffer-name buffer)))) | |
cf52ad58 RS |
3646 | ;; If BUFFER is a minibuffer, barf unless it's the currently |
3647 | ;; active minibuffer. | |
f436a90a | 3648 | (if (and mini-p |
45486731 RS |
3649 | (or (not (active-minibuffer-window)) |
3650 | (not (equal buffer | |
3651 | (window-buffer (active-minibuffer-window)))))) | |
cf52ad58 RS |
3652 | (error "Minibuffer is not active for completion") |
3653 | ;; Insert the completion into the buffer where completion was requested. | |
3654 | (set-buffer buffer) | |
f6b293e3 | 3655 | (if base-size |
f436a90a RS |
3656 | (delete-region (+ base-size (if mini-p |
3657 | (minibuffer-prompt-end) | |
3658 | (point-min))) | |
3659 | (point)) | |
f6b293e3 | 3660 | (choose-completion-delete-max-match choice)) |
cf52ad58 | 3661 | (insert choice) |
63240af1 RS |
3662 | (remove-text-properties (- (point) (length choice)) (point) |
3663 | '(mouse-face nil)) | |
cf52ad58 RS |
3664 | ;; Update point in the window that BUFFER is showing in. |
3665 | (let ((window (get-buffer-window buffer t))) | |
3666 | (set-window-point window (point))) | |
3667 | ;; If completing for the minibuffer, exit it with this choice. | |
83434bda RS |
3668 | (and (not completion-no-auto-exit) |
3669 | (equal buffer (window-buffer (minibuffer-window))) | |
8881ad9a | 3670 | minibuffer-completion-table |
74d0290b RS |
3671 | ;; If this is reading a file name, and the file name chosen |
3672 | ;; is a directory, don't exit the minibuffer. | |
3673 | (if (and (eq minibuffer-completion-table 'read-file-name-internal) | |
a4d1159b | 3674 | (file-directory-p (field-string (point-max)))) |
74d0290b RS |
3675 | (select-window (active-minibuffer-window)) |
3676 | (exit-minibuffer)))))) | |
80298193 | 3677 | |
ac29eb79 | 3678 | (defun completion-list-mode () |
e8a700bf | 3679 | "Major mode for buffers showing lists of possible completions. |
80298193 RS |
3680 | Type \\<completion-list-mode-map>\\[choose-completion] in the completion list\ |
3681 | to select the completion near point. | |
3682 | Use \\<completion-list-mode-map>\\[mouse-choose-completion] to select one\ | |
3683 | with the mouse." | |
e8a700bf RS |
3684 | (interactive) |
3685 | (kill-all-local-variables) | |
ac29eb79 RS |
3686 | (use-local-map completion-list-mode-map) |
3687 | (setq mode-name "Completion List") | |
3688 | (setq major-mode 'completion-list-mode) | |
f6b293e3 RS |
3689 | (make-local-variable 'completion-base-size) |
3690 | (setq completion-base-size nil) | |
ac29eb79 | 3691 | (run-hooks 'completion-list-mode-hook)) |
e8a700bf | 3692 | |
747a0e2f RS |
3693 | (defvar completion-setup-hook nil |
3694 | "Normal hook run at the end of setting up a completion list buffer. | |
3695 | When this hook is run, the current buffer is the one in which the | |
3696 | command to display the completion list buffer was run. | |
3697 | The completion list buffer is available as the value of `standard-output'.") | |
3698 | ||
98b45886 RS |
3699 | ;; This function goes in completion-setup-hook, so that it is called |
3700 | ;; after the text of the completion list buffer is written. | |
6096f362 | 3701 | |
e8a700bf RS |
3702 | (defun completion-setup-function () |
3703 | (save-excursion | |
98b45886 | 3704 | (let ((mainbuf (current-buffer))) |
3819736b RS |
3705 | (set-buffer standard-output) |
3706 | (completion-list-mode) | |
3707 | (make-local-variable 'completion-reference-buffer) | |
3708 | (setq completion-reference-buffer mainbuf) | |
50be475d RS |
3709 | (if (eq minibuffer-completion-table 'read-file-name-internal) |
3710 | ;; For file name completion, | |
3711 | ;; use the number of chars before the start of the | |
3712 | ;; last file name component. | |
3713 | (setq completion-base-size | |
3714 | (save-excursion | |
3715 | (set-buffer mainbuf) | |
3716 | (goto-char (point-max)) | |
3717 | (skip-chars-backward (format "^%c" directory-sep-char)) | |
0aad4805 | 3718 | (- (point) (minibuffer-prompt-end)))) |
19183a29 RS |
3719 | ;; Otherwise, in minibuffer, the whole input is being completed. |
3720 | (save-match-data | |
3721 | (if (string-match "\\` \\*Minibuf-[0-9]+\\*\\'" | |
3722 | (buffer-name mainbuf)) | |
3723 | (setq completion-base-size 0)))) | |
3819736b | 3724 | (goto-char (point-min)) |
0d6e23cf | 3725 | (if (display-mouse-p) |
3819736b | 3726 | (insert (substitute-command-keys |
80298193 RS |
3727 | "Click \\[mouse-choose-completion] on a completion to select it.\n"))) |
3728 | (insert (substitute-command-keys | |
3729 | "In this buffer, type \\[choose-completion] to \ | |
7d22ed15 | 3730 | select the completion near point.\n\n"))))) |
c88ab9ce | 3731 | |
e8a700bf | 3732 | (add-hook 'completion-setup-hook 'completion-setup-function) |
dde69dbe RS |
3733 | |
3734 | (define-key minibuffer-local-completion-map [prior] | |
3735 | 'switch-to-completions) | |
3736 | (define-key minibuffer-local-must-match-map [prior] | |
3737 | 'switch-to-completions) | |
3738 | (define-key minibuffer-local-completion-map "\M-v" | |
3739 | 'switch-to-completions) | |
3740 | (define-key minibuffer-local-must-match-map "\M-v" | |
3741 | 'switch-to-completions) | |
3742 | ||
3743 | (defun switch-to-completions () | |
3744 | "Select the completion list window." | |
3745 | (interactive) | |
9595fbdb RS |
3746 | ;; Make sure we have a completions window. |
3747 | (or (get-buffer-window "*Completions*") | |
3748 | (minibuffer-completion-help)) | |
fdbd7c4d KH |
3749 | (let ((window (get-buffer-window "*Completions*"))) |
3750 | (when window | |
3751 | (select-window window) | |
3752 | (goto-char (point-min)) | |
3753 | (search-forward "\n\n") | |
3754 | (forward-line 1)))) | |
eaae8106 | 3755 | |
82072f33 RS |
3756 | ;; Support keyboard commands to turn on various modifiers. |
3757 | ||
3758 | ;; These functions -- which are not commands -- each add one modifier | |
3759 | ;; to the following event. | |
3760 | ||
3761 | (defun event-apply-alt-modifier (ignore-prompt) | |
70cf9f08 KH |
3762 | "Add the Alt modifier to the following event. |
3763 | For example, type \\[event-apply-alt-modifier] & to enter Alt-&." | |
82072f33 RS |
3764 | (vector (event-apply-modifier (read-event) 'alt 22 "A-"))) |
3765 | (defun event-apply-super-modifier (ignore-prompt) | |
70cf9f08 KH |
3766 | "Add the Super modifier to the following event. |
3767 | For example, type \\[event-apply-super-modifier] & to enter Super-&." | |
82072f33 RS |
3768 | (vector (event-apply-modifier (read-event) 'super 23 "s-"))) |
3769 | (defun event-apply-hyper-modifier (ignore-prompt) | |
70cf9f08 KH |
3770 | "Add the Hyper modifier to the following event. |
3771 | For example, type \\[event-apply-hyper-modifier] & to enter Hyper-&." | |
82072f33 RS |
3772 | (vector (event-apply-modifier (read-event) 'hyper 24 "H-"))) |
3773 | (defun event-apply-shift-modifier (ignore-prompt) | |
70cf9f08 KH |
3774 | "Add the Shift modifier to the following event. |
3775 | For example, type \\[event-apply-shift-modifier] & to enter Shift-&." | |
82072f33 RS |
3776 | (vector (event-apply-modifier (read-event) 'shift 25 "S-"))) |
3777 | (defun event-apply-control-modifier (ignore-prompt) | |
70cf9f08 KH |
3778 | "Add the Ctrl modifier to the following event. |
3779 | For example, type \\[event-apply-control-modifier] & to enter Ctrl-&." | |
82072f33 RS |
3780 | (vector (event-apply-modifier (read-event) 'control 26 "C-"))) |
3781 | (defun event-apply-meta-modifier (ignore-prompt) | |
70cf9f08 KH |
3782 | "Add the Meta modifier to the following event. |
3783 | For example, type \\[event-apply-meta-modifier] & to enter Meta-&." | |
82072f33 RS |
3784 | (vector (event-apply-modifier (read-event) 'meta 27 "M-"))) |
3785 | ||
3786 | (defun event-apply-modifier (event symbol lshiftby prefix) | |
3787 | "Apply a modifier flag to event EVENT. | |
3788 | SYMBOL is the name of this modifier, as a symbol. | |
3789 | LSHIFTBY is the numeric value of this modifier, in keyboard events. | |
3790 | PREFIX is the string that represents this modifier in an event type symbol." | |
3791 | (if (numberp event) | |
3792 | (cond ((eq symbol 'control) | |
90bebcb0 KH |
3793 | (if (and (<= (downcase event) ?z) |
3794 | (>= (downcase event) ?a)) | |
82072f33 | 3795 | (- (downcase event) ?a -1) |
90bebcb0 KH |
3796 | (if (and (<= (downcase event) ?Z) |
3797 | (>= (downcase event) ?A)) | |
82072f33 RS |
3798 | (- (downcase event) ?A -1) |
3799 | (logior (lsh 1 lshiftby) event)))) | |
3800 | ((eq symbol 'shift) | |
3801 | (if (and (<= (downcase event) ?z) | |
3802 | (>= (downcase event) ?a)) | |
3803 | (upcase event) | |
3804 | (logior (lsh 1 lshiftby) event))) | |
3805 | (t | |
3806 | (logior (lsh 1 lshiftby) event))) | |
3807 | (if (memq symbol (event-modifiers event)) | |
3808 | event | |
3809 | (let ((event-type (if (symbolp event) event (car event)))) | |
3810 | (setq event-type (intern (concat prefix (symbol-name event-type)))) | |
3811 | (if (symbolp event) | |
3812 | event-type | |
3813 | (cons event-type (cdr event))))))) | |
3814 | ||
e5fff738 KH |
3815 | (define-key function-key-map [?\C-x ?@ ?h] 'event-apply-hyper-modifier) |
3816 | (define-key function-key-map [?\C-x ?@ ?s] 'event-apply-super-modifier) | |
3817 | (define-key function-key-map [?\C-x ?@ ?m] 'event-apply-meta-modifier) | |
3818 | (define-key function-key-map [?\C-x ?@ ?a] 'event-apply-alt-modifier) | |
3819 | (define-key function-key-map [?\C-x ?@ ?S] 'event-apply-shift-modifier) | |
3820 | (define-key function-key-map [?\C-x ?@ ?c] 'event-apply-control-modifier) | |
eaae8106 | 3821 | |
a3d1480b JB |
3822 | ;;;; Keypad support. |
3823 | ||
3824 | ;;; Make the keypad keys act like ordinary typing keys. If people add | |
3825 | ;;; bindings for the function key symbols, then those bindings will | |
3826 | ;;; override these, so this shouldn't interfere with any existing | |
3827 | ;;; bindings. | |
3828 | ||
0d173134 | 3829 | ;; Also tell read-char how to handle these keys. |
a3d1480b JB |
3830 | (mapcar |
3831 | (lambda (keypad-normal) | |
3832 | (let ((keypad (nth 0 keypad-normal)) | |
3833 | (normal (nth 1 keypad-normal))) | |
0d173134 | 3834 | (put keypad 'ascii-character normal) |
a3d1480b JB |
3835 | (define-key function-key-map (vector keypad) (vector normal)))) |
3836 | '((kp-0 ?0) (kp-1 ?1) (kp-2 ?2) (kp-3 ?3) (kp-4 ?4) | |
3837 | (kp-5 ?5) (kp-6 ?6) (kp-7 ?7) (kp-8 ?8) (kp-9 ?9) | |
3838 | (kp-space ?\ ) | |
3839 | (kp-tab ?\t) | |
3840 | (kp-enter ?\r) | |
3841 | (kp-multiply ?*) | |
3842 | (kp-add ?+) | |
3843 | (kp-separator ?,) | |
3844 | (kp-subtract ?-) | |
3845 | (kp-decimal ?.) | |
3846 | (kp-divide ?/) | |
3847 | (kp-equal ?=))) | |
3848 | ||
1e722f9f | 3849 | ;;;; |
b005abd5 | 3850 | ;;;; forking a twin copy of a buffer. |
1e722f9f | 3851 | ;;;; |
b005abd5 SM |
3852 | |
3853 | (defvar clone-buffer-hook nil | |
3854 | "Normal hook to run in the new buffer at the end of `clone-buffer'.") | |
3855 | ||
3856 | (defun clone-process (process &optional newname) | |
3857 | "Create a twin copy of PROCESS. | |
3858 | If NEWNAME is nil, it defaults to PROCESS' name; | |
3859 | NEWNAME is modified by adding or incrementing <N> at the end as necessary. | |
3860 | If PROCESS is associated with a buffer, the new process will be associated | |
3861 | with the current buffer instead. | |
3862 | Returns nil if PROCESS has already terminated." | |
3863 | (setq newname (or newname (process-name process))) | |
3864 | (if (string-match "<[0-9]+>\\'" newname) | |
3865 | (setq newname (substring newname 0 (match-beginning 0)))) | |
3866 | (when (memq (process-status process) '(run stop open)) | |
3867 | (let* ((process-connection-type (process-tty-name process)) | |
3868 | (old-kwoq (process-kill-without-query process nil)) | |
3869 | (new-process | |
3870 | (if (memq (process-status process) '(open)) | |
3871 | (apply 'open-network-stream newname | |
3872 | (if (process-buffer process) (current-buffer)) | |
3873 | (process-contact process)) | |
3874 | (apply 'start-process newname | |
3875 | (if (process-buffer process) (current-buffer)) | |
3876 | (process-command process))))) | |
3877 | (process-kill-without-query new-process old-kwoq) | |
3878 | (process-kill-without-query process old-kwoq) | |
3879 | (set-process-inherit-coding-system-flag | |
3880 | new-process (process-inherit-coding-system-flag process)) | |
3881 | (set-process-filter new-process (process-filter process)) | |
3882 | (set-process-sentinel new-process (process-sentinel process)) | |
3883 | new-process))) | |
3884 | ||
3885 | ;; things to maybe add (currently partly covered by `funcall mode': | |
3886 | ;; - syntax-table | |
3887 | ;; - overlays | |
3888 | (defun clone-buffer (&optional newname display-flag) | |
3889 | "Create a twin copy of the current buffer. | |
3890 | If NEWNAME is nil, it defaults to the current buffer's name; | |
3891 | NEWNAME is modified by adding or incrementing <N> at the end as necessary. | |
3892 | ||
3893 | If DISPLAY-FLAG is non-nil, the new buffer is shown with `pop-to-buffer'. | |
3894 | This runs the normal hook `clone-buffer-hook' in the new buffer | |
3895 | after it has been set up properly in other respects." | |
3896 | (interactive (list (if current-prefix-arg (read-string "Name: ")) | |
3897 | t)) | |
3898 | (if buffer-file-name | |
3899 | (error "Cannot clone a file-visiting buffer")) | |
3900 | (if (get major-mode 'no-clone) | |
3901 | (error "Cannot clone a buffer in %s mode" mode-name)) | |
3902 | (setq newname (or newname (buffer-name))) | |
3903 | (if (string-match "<[0-9]+>\\'" newname) | |
3904 | (setq newname (substring newname 0 (match-beginning 0)))) | |
3905 | (let ((buf (current-buffer)) | |
3906 | (ptmin (point-min)) | |
3907 | (ptmax (point-max)) | |
3908 | (pt (point)) | |
3909 | (mk (if mark-active (mark t))) | |
3910 | (modified (buffer-modified-p)) | |
3911 | (mode major-mode) | |
3912 | (lvars (buffer-local-variables)) | |
3913 | (process (get-buffer-process (current-buffer))) | |
3914 | (new (generate-new-buffer (or newname (buffer-name))))) | |
3915 | (save-restriction | |
3916 | (widen) | |
3917 | (with-current-buffer new | |
3918 | (insert-buffer-substring buf))) | |
3919 | (with-current-buffer new | |
3920 | (narrow-to-region ptmin ptmax) | |
3921 | (goto-char pt) | |
3922 | (if mk (set-mark mk)) | |
3923 | (set-buffer-modified-p modified) | |
3924 | ||
3925 | ;; Clone the old buffer's process, if any. | |
3926 | (when process (clone-process process)) | |
3927 | ||
3928 | ;; Now set up the major mode. | |
3929 | (funcall mode) | |
3930 | ||
3931 | ;; Set up other local variables. | |
3932 | (mapcar (lambda (v) | |
3933 | (condition-case () ;in case var is read-only | |
3934 | (if (symbolp v) | |
3935 | (makunbound v) | |
3936 | (set (make-local-variable (car v)) (cdr v))) | |
3937 | (error nil))) | |
3938 | lvars) | |
3939 | ||
3940 | ;; Run any hooks (typically set up by the major mode | |
3941 | ;; for cloning to work properly). | |
3942 | (run-hooks 'clone-buffer-hook)) | |
3943 | (if display-flag (pop-to-buffer new)) | |
3944 | new)) | |
3945 | ||
fa65f20b | 3946 | |
7e3afb04 | 3947 | (defun clone-indirect-buffer (newname display-flag &optional norecord) |
fa65f20b GM |
3948 | "Create an indirect buffer that is a twin copy of the current buffer. |
3949 | ||
3950 | Give the indirect buffer name NEWNAME. Interactively, read NEW-NAME | |
3951 | from the minibuffer when invoked with a prefix arg. If NEWNAME is nil | |
3952 | or if not called with a prefix arg, NEWNAME defaults to the current | |
3953 | buffer's name. The name is modified by adding a `<N>' suffix to it | |
3954 | or by incrementing the N in an existing suffix. | |
3955 | ||
3956 | DISPLAY-FLAG non-nil means show the new buffer with `pop-to-buffer'. | |
7e3afb04 GM |
3957 | This is always done when called interactively. |
3958 | ||
3959 | Optional last arg NORECORD non-nil means do not put this buffer at the | |
3960 | front of the list of recently selected ones." | |
fa65f20b GM |
3961 | (interactive (list (if current-prefix-arg |
3962 | (read-string "BName of indirect buffer: ")) | |
3963 | t)) | |
3964 | (setq newname (or newname (buffer-name))) | |
3965 | (if (string-match "<[0-9]+>\\'" newname) | |
3966 | (setq newname (substring newname 0 (match-beginning 0)))) | |
3967 | (let* ((name (generate-new-buffer-name newname)) | |
3968 | (buffer (make-indirect-buffer (current-buffer) name t))) | |
3969 | (when display-flag | |
58dd38f1 | 3970 | (pop-to-buffer buffer norecord)) |
fa65f20b GM |
3971 | buffer)) |
3972 | ||
3973 | ||
7e3afb04 GM |
3974 | (defun clone-indirect-buffer-other-window (buffer &optional norecord) |
3975 | "Create an indirect buffer that is a twin copy of BUFFER. | |
3976 | Select the new buffer in another window. | |
3977 | Optional second arg NORECORD non-nil means do not put this buffer at | |
3978 | the front of the list of recently selected ones." | |
3979 | (interactive "bClone buffer in other window: ") | |
3980 | (let ((popup-windows t)) | |
3981 | (set-buffer buffer) | |
3982 | (clone-indirect-buffer nil t norecord))) | |
3983 | ||
14583cb1 | 3984 | (define-key ctl-x-4-map "c" 'clone-indirect-buffer-other-window) |
7e3afb04 | 3985 | |
eaae8106 | 3986 | |
f1a9c7b9 GM |
3987 | ;;; Syntax stuff. |
3988 | ||
3989 | (defconst syntax-code-table | |
24dad5d5 KH |
3990 | '((?\ 0 "whitespace") |
3991 | (?- 0 "whitespace") | |
3992 | (?. 1 "punctuation") | |
3993 | (?w 2 "word") | |
3994 | (?_ 3 "symbol") | |
3995 | (?\( 4 "open parenthesis") | |
3996 | (?\) 5 "close parenthesis") | |
3997 | (?\' 6 "expression prefix") | |
3998 | (?\" 7 "string quote") | |
3999 | (?$ 8 "paired delimiter") | |
4000 | (?\\ 9 "escape") | |
4001 | (?/ 10 "character quote") | |
4002 | (?< 11 "comment start") | |
4003 | (?> 12 "comment end") | |
4004 | (?@ 13 "inherit") | |
4005 | (nil 14 "comment fence") | |
4006 | (nil 15 "string fence")) | |
4007 | "Alist of forms (CHAR CODE DESCRIPTION) mapping characters to syntax info. | |
f1a9c7b9 GM |
4008 | CHAR is a character that is allowed as first char in the string |
4009 | specifying the syntax when calling `modify-syntax-entry'. CODE is the | |
4010 | corresponing syntax code as it is stored in a syntax cell, and | |
24dad5d5 KH |
4011 | can be used as value of a `syntax-table' property. |
4012 | DESCRIPTION is the descriptive string for the syntax.") | |
f1a9c7b9 | 4013 | |
eaae8106 | 4014 | |
1d4b11bf GM |
4015 | ;;; Handling of Backspace and Delete keys. |
4016 | ||
4017 | (defcustom delete-key-deletes-forward nil | |
4018 | "Whether the Delete key should delete forward or not. | |
4019 | ||
4020 | On window systems, the default value of this option is chosen | |
4021 | according to the keyboard used. If the keyboard has both a Backspace | |
4022 | key and a Delete key, and both are mapped to their usual meanings, the | |
4023 | option's default value is set to t, so that Backspace can be used to | |
4024 | delete backward, and Delete can be used used to delete forward | |
4025 | ||
4026 | If not running under a window system, setting this option accomplishes | |
4027 | a similar effect by mapping C-h, which is usually generated by the | |
4028 | Backspace key, to DEL, and by mapping DEL to C-d via | |
4029 | `keyboard-translate'. The former functionality of C-h is available on | |
4030 | the F1 key. You should probably not use this setting if you don't | |
4031 | have both Backspace, Delete and F1 keys." | |
4032 | :type 'boolean | |
4033 | :group 'editing-basics | |
4034 | :version "21.1" | |
4035 | :set (lambda (symbol value) | |
4036 | ;; The fboundp is because of a problem with :set when | |
4037 | ;; dumping Emacs. It doesn't really matter. | |
4038 | (if (fboundp 'delete-key-deletes-forward-mode) | |
4039 | (delete-key-deletes-forward-mode (or value 0)) | |
4040 | (set-default symbol value)))) | |
4041 | ||
4042 | ||
4043 | (defun delete-key-deletes-forward-mode (&optional arg) | |
4044 | "Toggle Delete key deleting forward or backward. | |
4045 | With numeric arg, turn the mode on if and only iff ARG is positive. | |
4046 | For more details, see `delete-key-deleted-forward'." | |
4047 | (interactive "P") | |
4048 | (setq delete-key-deletes-forward | |
4049 | (if arg | |
4050 | (> (prefix-numeric-value arg) 0) | |
4051 | (not delete-key-deletes-forward))) | |
4052 | ||
13a9eed7 EZ |
4053 | (cond ((or (memq window-system '(x w32 mac pc)) |
4054 | (memq system-type '(ms-dos windows-nt))) | |
1d4b11bf GM |
4055 | (if delete-key-deletes-forward |
4056 | (progn | |
4057 | (define-key global-map [delete] 'delete-char) | |
4058 | (define-key global-map [C-delete] 'kill-word) | |
4059 | (define-key esc-map [C-delete] 'kill-sexp) | |
4060 | (define-key global-map [C-M-delete] 'kill-sexp)) | |
4061 | (define-key esc-map [C-delete] 'backward-kill-sexp) | |
4062 | (define-key global-map [C-M-delete] 'backward-kill-sexp) | |
4063 | (define-key global-map [C-delete] 'backward-kill-word) | |
4064 | (define-key global-map [delete] 'delete-backward-char))) | |
4065 | (t | |
4066 | (if delete-key-deletes-forward | |
4067 | (progn | |
4068 | (keyboard-translate ?\C-h ?\C-?) | |
4069 | (keyboard-translate ?\C-? ?\C-d)) | |
4070 | (keyboard-translate ?\C-h ?\C-h) | |
4071 | (keyboard-translate ?\C-? ?\C-?)))) | |
4072 | ||
4073 | (run-hooks 'delete-key-deletes-forward-hook) | |
4074 | (if (interactive-p) | |
4075 | (message "Delete key deletes %s" | |
4076 | (if delete-key-deletes-forward "forward" "backward")))) | |
4077 | ||
4078 | ||
9985d391 GM |
4079 | ;;; Misc |
4080 | ||
4081 | (defun byte-compiling-files-p () | |
4082 | "Return t if currently byte-compiling files." | |
4083 | (and (boundp 'byte-compile-current-file) | |
4084 | (stringp byte-compile-current-file))) | |
eaae8106 | 4085 | |
c88ab9ce | 4086 | ;;; simple.el ends here |