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c88ab9ce ER |
1 | ;;; simple.el --- basic editing commands for Emacs |
2 | ||
9e50756b | 3 | ;; Copyright (C) 1985, 1986, 1987, 1993, 1994 Free Software Foundation, Inc. |
2076c87c JB |
4 | |
5 | ;; This file is part of GNU Emacs. | |
6 | ||
7 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
8 | ;; it under the terms of the GNU General Public License as published by | |
3a801d0c | 9 | ;; the Free Software Foundation; either version 2, or (at your option) |
2076c87c JB |
10 | ;; any later version. |
11 | ||
12 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
13 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | ;; GNU General Public License for more details. | |
16 | ||
17 | ;; You should have received a copy of the GNU General Public License | |
18 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
19 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | ||
d9ecc911 ER |
21 | ;;; Commentary: |
22 | ||
23 | ;; A grab-bag of basic Emacs commands not specifically related to some | |
24 | ;; major mode or to file-handling. | |
25 | ||
3a801d0c | 26 | ;;; Code: |
2076c87c JB |
27 | |
28 | (defun open-line (arg) | |
ff1fbe3e | 29 | "Insert a newline and leave point before it. |
616ed245 RS |
30 | If there is a fill prefix, insert the fill prefix on the new line |
31 | if the line would have been empty. | |
32 | With arg N, insert N newlines." | |
2076c87c | 33 | (interactive "*p") |
616ed245 RS |
34 | (let* ((do-fill-prefix (and fill-prefix (bolp))) |
35 | (flag (and (null do-fill-prefix) (bolp) (not (bobp))))) | |
62c48f87 RS |
36 | ;; If this is a simple case, and we are at the beginning of a line, |
37 | ;; actually insert the newline *before* the preceding newline | |
38 | ;; instead of after. That makes better display behavior. | |
39 | (if flag | |
40 | (progn | |
41 | ;; If undo is enabled, don't let this hack be visible: | |
42 | ;; record the real value of point as the place to move back to | |
43 | ;; if we undo this insert. | |
e917fa07 | 44 | (if (not (eq buffer-undo-list t)) |
62c48f87 RS |
45 | (setq buffer-undo-list (cons (point) buffer-undo-list))) |
46 | (forward-char -1))) | |
aa648601 RS |
47 | (save-excursion |
48 | (while (> arg 0) | |
49 | (if do-fill-prefix (insert fill-prefix)) | |
50 | (insert ?\n) | |
51 | (setq arg (1- arg)))) | |
52 | (end-of-line) | |
2076c87c JB |
53 | (if flag (forward-char 1)))) |
54 | ||
55 | (defun split-line () | |
56 | "Split current line, moving portion beyond point vertically down." | |
57 | (interactive "*") | |
58 | (skip-chars-forward " \t") | |
59 | (let ((col (current-column)) | |
60 | (pos (point))) | |
61 | (insert ?\n) | |
62 | (indent-to col 0) | |
63 | (goto-char pos))) | |
64 | ||
65 | (defun quoted-insert (arg) | |
66 | "Read next input character and insert it. | |
ff1fbe3e | 67 | This is useful for inserting control characters. |
dbc4e1c1 | 68 | You may also type up to 3 octal digits, to insert a character with that code. |
b6a22db0 JB |
69 | |
70 | In overwrite mode, this function inserts the character anyway, and | |
71 | does not handle octal digits specially. This means that if you use | |
72 | overwrite as your normal editing mode, you can use this function to | |
73 | insert characters when necessary. | |
74 | ||
75 | In binary overwrite mode, this function does overwrite, and octal | |
76 | digits are interpreted as a character code. This is supposed to make | |
77 | this function useful in editing binary files." | |
2076c87c | 78 | (interactive "*p") |
b6a22db0 JB |
79 | (let ((char (if (or (not overwrite-mode) |
80 | (eq overwrite-mode 'overwrite-mode-binary)) | |
81 | (read-quoted-char) | |
82 | (read-char)))) | |
83 | (if (eq overwrite-mode 'overwrite-mode-binary) | |
84 | (delete-char arg)) | |
1537a263 | 85 | (insert-char char arg))) |
2076c87c JB |
86 | |
87 | (defun delete-indentation (&optional arg) | |
88 | "Join this line to previous and fix up whitespace at join. | |
ccc58657 | 89 | If there is a fill prefix, delete it from the beginning of this line. |
2076c87c JB |
90 | With argument, join this line to following line." |
91 | (interactive "*P") | |
92 | (beginning-of-line) | |
93 | (if arg (forward-line 1)) | |
94 | (if (eq (preceding-char) ?\n) | |
95 | (progn | |
96 | (delete-region (point) (1- (point))) | |
ccc58657 RS |
97 | ;; If the second line started with the fill prefix, |
98 | ;; delete the prefix. | |
99 | (if (and fill-prefix | |
01b8e020 | 100 | (<= (+ (point) (length fill-prefix)) (point-max)) |
ccc58657 RS |
101 | (string= fill-prefix |
102 | (buffer-substring (point) | |
103 | (+ (point) (length fill-prefix))))) | |
104 | (delete-region (point) (+ (point) (length fill-prefix)))) | |
2076c87c JB |
105 | (fixup-whitespace)))) |
106 | ||
107 | (defun fixup-whitespace () | |
108 | "Fixup white space between objects around point. | |
109 | Leave one space or none, according to the context." | |
110 | (interactive "*") | |
111 | (save-excursion | |
112 | (delete-horizontal-space) | |
113 | (if (or (looking-at "^\\|\\s)") | |
114 | (save-excursion (forward-char -1) | |
115 | (looking-at "$\\|\\s(\\|\\s'"))) | |
116 | nil | |
117 | (insert ?\ )))) | |
118 | ||
119 | (defun delete-horizontal-space () | |
120 | "Delete all spaces and tabs around point." | |
121 | (interactive "*") | |
122 | (skip-chars-backward " \t") | |
123 | (delete-region (point) (progn (skip-chars-forward " \t") (point)))) | |
124 | ||
125 | (defun just-one-space () | |
126 | "Delete all spaces and tabs around point, leaving one space." | |
127 | (interactive "*") | |
128 | (skip-chars-backward " \t") | |
129 | (if (= (following-char) ? ) | |
130 | (forward-char 1) | |
131 | (insert ? )) | |
132 | (delete-region (point) (progn (skip-chars-forward " \t") (point)))) | |
133 | ||
134 | (defun delete-blank-lines () | |
135 | "On blank line, delete all surrounding blank lines, leaving just one. | |
136 | On isolated blank line, delete that one. | |
6d30d416 | 137 | On nonblank line, delete any immediately following blank lines." |
2076c87c JB |
138 | (interactive "*") |
139 | (let (thisblank singleblank) | |
140 | (save-excursion | |
141 | (beginning-of-line) | |
142 | (setq thisblank (looking-at "[ \t]*$")) | |
70e14c01 | 143 | ;; Set singleblank if there is just one blank line here. |
2076c87c JB |
144 | (setq singleblank |
145 | (and thisblank | |
146 | (not (looking-at "[ \t]*\n[ \t]*$")) | |
147 | (or (bobp) | |
148 | (progn (forward-line -1) | |
149 | (not (looking-at "[ \t]*$"))))))) | |
70e14c01 | 150 | ;; Delete preceding blank lines, and this one too if it's the only one. |
2076c87c JB |
151 | (if thisblank |
152 | (progn | |
153 | (beginning-of-line) | |
154 | (if singleblank (forward-line 1)) | |
155 | (delete-region (point) | |
156 | (if (re-search-backward "[^ \t\n]" nil t) | |
157 | (progn (forward-line 1) (point)) | |
158 | (point-min))))) | |
70e14c01 JB |
159 | ;; Delete following blank lines, unless the current line is blank |
160 | ;; and there are no following blank lines. | |
2076c87c JB |
161 | (if (not (and thisblank singleblank)) |
162 | (save-excursion | |
163 | (end-of-line) | |
164 | (forward-line 1) | |
165 | (delete-region (point) | |
166 | (if (re-search-forward "[^ \t\n]" nil t) | |
167 | (progn (beginning-of-line) (point)) | |
70e14c01 JB |
168 | (point-max))))) |
169 | ;; Handle the special case where point is followed by newline and eob. | |
170 | ;; Delete the line, leaving point at eob. | |
171 | (if (looking-at "^[ \t]*\n\\'") | |
172 | (delete-region (point) (point-max))))) | |
2076c87c JB |
173 | |
174 | (defun back-to-indentation () | |
175 | "Move point to the first non-whitespace character on this line." | |
176 | (interactive) | |
177 | (beginning-of-line 1) | |
178 | (skip-chars-forward " \t")) | |
179 | ||
180 | (defun newline-and-indent () | |
181 | "Insert a newline, then indent according to major mode. | |
ff1fbe3e | 182 | Indentation is done using the value of `indent-line-function'. |
2076c87c | 183 | In programming language modes, this is the same as TAB. |
ff1fbe3e RS |
184 | In some text modes, where TAB inserts a tab, this command indents to the |
185 | column specified by the variable `left-margin'." | |
2076c87c JB |
186 | (interactive "*") |
187 | (delete-region (point) (progn (skip-chars-backward " \t") (point))) | |
46947372 | 188 | (newline) |
2076c87c JB |
189 | (indent-according-to-mode)) |
190 | ||
191 | (defun reindent-then-newline-and-indent () | |
192 | "Reindent current line, insert newline, then indent the new line. | |
193 | Indentation of both lines is done according to the current major mode, | |
ff1fbe3e | 194 | which means calling the current value of `indent-line-function'. |
2076c87c JB |
195 | In programming language modes, this is the same as TAB. |
196 | In some text modes, where TAB inserts a tab, this indents to the | |
ff1fbe3e | 197 | column specified by the variable `left-margin'." |
2076c87c JB |
198 | (interactive "*") |
199 | (save-excursion | |
200 | (delete-region (point) (progn (skip-chars-backward " \t") (point))) | |
201 | (indent-according-to-mode)) | |
46947372 | 202 | (newline) |
2076c87c JB |
203 | (indent-according-to-mode)) |
204 | ||
dff7d67f RS |
205 | ;; Internal subroutine of delete-char |
206 | (defun kill-forward-chars (arg) | |
207 | (if (listp arg) (setq arg (car arg))) | |
208 | (if (eq arg '-) (setq arg -1)) | |
209 | (kill-region (point) (+ (point) arg))) | |
210 | ||
211 | ;; Internal subroutine of backward-delete-char | |
212 | (defun kill-backward-chars (arg) | |
213 | (if (listp arg) (setq arg (car arg))) | |
214 | (if (eq arg '-) (setq arg -1)) | |
215 | (kill-region (point) (- (point) arg))) | |
216 | ||
2076c87c JB |
217 | (defun backward-delete-char-untabify (arg &optional killp) |
218 | "Delete characters backward, changing tabs into spaces. | |
219 | Delete ARG chars, and kill (save in kill ring) if KILLP is non-nil. | |
220 | Interactively, ARG is the prefix arg (default 1) | |
aba05ae4 | 221 | and KILLP is t if a prefix arg was specified." |
2076c87c JB |
222 | (interactive "*p\nP") |
223 | (let ((count arg)) | |
224 | (save-excursion | |
225 | (while (and (> count 0) (not (bobp))) | |
226 | (if (= (preceding-char) ?\t) | |
227 | (let ((col (current-column))) | |
228 | (forward-char -1) | |
229 | (setq col (- col (current-column))) | |
230 | (insert-char ?\ col) | |
231 | (delete-char 1))) | |
232 | (forward-char -1) | |
233 | (setq count (1- count))))) | |
234 | (delete-backward-char arg killp) | |
235 | ;; In overwrite mode, back over columns while clearing them out, | |
236 | ;; unless at end of line. | |
237 | (and overwrite-mode (not (eolp)) | |
238 | (save-excursion (insert-char ?\ arg)))) | |
239 | ||
240 | (defun zap-to-char (arg char) | |
241 | "Kill up to and including ARG'th occurrence of CHAR. | |
242 | Goes backward if ARG is negative; error if CHAR not found." | |
243 | (interactive "p\ncZap to char: ") | |
244 | (kill-region (point) (progn | |
245 | (search-forward (char-to-string char) nil nil arg) | |
246 | ; (goto-char (if (> arg 0) (1- (point)) (1+ (point)))) | |
247 | (point)))) | |
248 | ||
249 | (defun beginning-of-buffer (&optional arg) | |
250 | "Move point to the beginning of the buffer; leave mark at previous position. | |
251 | With arg N, put point N/10 of the way from the true beginning. | |
ff1fbe3e RS |
252 | |
253 | Don't use this command in Lisp programs! | |
2076c87c JB |
254 | \(goto-char (point-min)) is faster and avoids clobbering the mark." |
255 | (interactive "P") | |
256 | (push-mark) | |
257 | (goto-char (if arg | |
258 | (if (> (buffer-size) 10000) | |
259 | ;; Avoid overflow for large buffer sizes! | |
260 | (* (prefix-numeric-value arg) | |
261 | (/ (buffer-size) 10)) | |
262 | (/ (+ 10 (* (buffer-size) (prefix-numeric-value arg))) 10)) | |
263 | (point-min))) | |
264 | (if arg (forward-line 1))) | |
265 | ||
266 | (defun end-of-buffer (&optional arg) | |
267 | "Move point to the end of the buffer; leave mark at previous position. | |
268 | With arg N, put point N/10 of the way from the true end. | |
ff1fbe3e RS |
269 | |
270 | Don't use this command in Lisp programs! | |
2076c87c JB |
271 | \(goto-char (point-max)) is faster and avoids clobbering the mark." |
272 | (interactive "P") | |
273 | (push-mark) | |
274 | (goto-char (if arg | |
275 | (- (1+ (buffer-size)) | |
276 | (if (> (buffer-size) 10000) | |
277 | ;; Avoid overflow for large buffer sizes! | |
278 | (* (prefix-numeric-value arg) | |
279 | (/ (buffer-size) 10)) | |
280 | (/ (* (buffer-size) (prefix-numeric-value arg)) 10))) | |
281 | (point-max))) | |
3a801d0c ER |
282 | ;; If we went to a place in the middle of the buffer, |
283 | ;; adjust it to the beginning of a line. | |
2076c87c | 284 | (if arg (forward-line 1) |
3a801d0c ER |
285 | ;; If the end of the buffer is not already on the screen, |
286 | ;; then scroll specially to put it near, but not at, the bottom. | |
287 | (if (let ((old-point (point))) | |
288 | (save-excursion | |
289 | (goto-char (window-start)) | |
290 | (vertical-motion (window-height)) | |
291 | (< (point) old-point))) | |
97dfc68c RS |
292 | (progn |
293 | (overlay-recenter (point)) | |
294 | (recenter -3))))) | |
2076c87c JB |
295 | |
296 | (defun mark-whole-buffer () | |
70e14c01 JB |
297 | "Put point at beginning and mark at end of buffer. |
298 | You probably should not use this function in Lisp programs; | |
299 | it is usually a mistake for a Lisp function to use any subroutine | |
300 | that uses or sets the mark." | |
2076c87c JB |
301 | (interactive) |
302 | (push-mark (point)) | |
fd0f4056 | 303 | (push-mark (point-max) nil t) |
2076c87c JB |
304 | (goto-char (point-min))) |
305 | ||
306 | (defun count-lines-region (start end) | |
eb8c3be9 | 307 | "Print number of lines and characters in the region." |
2076c87c JB |
308 | (interactive "r") |
309 | (message "Region has %d lines, %d characters" | |
310 | (count-lines start end) (- end start))) | |
311 | ||
312 | (defun what-line () | |
313 | "Print the current line number (in the buffer) of point." | |
314 | (interactive) | |
315 | (save-restriction | |
316 | (widen) | |
317 | (save-excursion | |
318 | (beginning-of-line) | |
319 | (message "Line %d" | |
320 | (1+ (count-lines 1 (point))))))) | |
321 | ||
322 | (defun count-lines (start end) | |
323 | "Return number of lines between START and END. | |
324 | This is usually the number of newlines between them, | |
ff1fbe3e | 325 | but can be one more if START is not equal to END |
2076c87c | 326 | and the greater of them is not at the start of a line." |
dde92ca6 RS |
327 | (save-match-data |
328 | (save-excursion | |
329 | (save-restriction | |
330 | (narrow-to-region start end) | |
331 | (goto-char (point-min)) | |
332 | (if (eq selective-display t) | |
333 | (let ((done 0)) | |
334 | (while (re-search-forward "[\n\C-m]" nil t 40) | |
335 | (setq done (+ 40 done))) | |
336 | (while (re-search-forward "[\n\C-m]" nil t 1) | |
337 | (setq done (+ 1 done))) | |
043efc41 RS |
338 | (goto-char (point-max)) |
339 | (if (and (/= start end) | |
340 | (not (bolp))) | |
341 | (1+ done) | |
342 | done)) | |
dde92ca6 | 343 | (- (buffer-size) (forward-line (buffer-size)))))))) |
2076c87c JB |
344 | |
345 | (defun what-cursor-position () | |
346 | "Print info on cursor position (on screen and within buffer)." | |
347 | (interactive) | |
348 | (let* ((char (following-char)) | |
349 | (beg (point-min)) | |
350 | (end (point-max)) | |
351 | (pos (point)) | |
352 | (total (buffer-size)) | |
353 | (percent (if (> total 50000) | |
354 | ;; Avoid overflow from multiplying by 100! | |
355 | (/ (+ (/ total 200) (1- pos)) (max (/ total 100) 1)) | |
356 | (/ (+ (/ total 2) (* 100 (1- pos))) (max total 1)))) | |
357 | (hscroll (if (= (window-hscroll) 0) | |
358 | "" | |
359 | (format " Hscroll=%d" (window-hscroll)))) | |
360 | (col (current-column))) | |
361 | (if (= pos end) | |
362 | (if (or (/= beg 1) (/= end (1+ total))) | |
363 | (message "point=%d of %d(%d%%) <%d - %d> column %d %s" | |
364 | pos total percent beg end col hscroll) | |
365 | (message "point=%d of %d(%d%%) column %d %s" | |
366 | pos total percent col hscroll)) | |
367 | (if (or (/= beg 1) (/= end (1+ total))) | |
368 | (message "Char: %s (0%o) point=%d of %d(%d%%) <%d - %d> column %d %s" | |
369 | (single-key-description char) char pos total percent beg end col hscroll) | |
370 | (message "Char: %s (0%o) point=%d of %d(%d%%) column %d %s" | |
371 | (single-key-description char) char pos total percent col hscroll))))) | |
372 | ||
373 | (defun fundamental-mode () | |
374 | "Major mode not specialized for anything in particular. | |
375 | Other major modes are defined by comparison with this one." | |
376 | (interactive) | |
377 | (kill-all-local-variables)) | |
378 | ||
4578d35d | 379 | (defvar read-expression-map (cons 'keymap minibuffer-local-map) |
854c16c5 RS |
380 | "Minibuffer keymap used for reading Lisp expressions.") |
381 | (define-key read-expression-map "\M-\t" 'lisp-complete-symbol) | |
382 | ||
2076c87c JB |
383 | (put 'eval-expression 'disabled t) |
384 | ||
8570b0ca RM |
385 | (defvar read-expression-history nil) |
386 | ||
387 | ;; We define this, rather than making `eval' interactive, | |
2076c87c JB |
388 | ;; for the sake of completion of names like eval-region, eval-current-buffer. |
389 | (defun eval-expression (expression) | |
390 | "Evaluate EXPRESSION and print value in minibuffer. | |
eb57c304 | 391 | Value is also consed on to front of the variable `values'." |
adca5fa6 | 392 | (interactive |
b387ef9a RS |
393 | (list (read-from-minibuffer "Eval: " |
394 | nil read-expression-map t | |
395 | 'read-expression-history))) | |
2076c87c JB |
396 | (setq values (cons (eval expression) values)) |
397 | (prin1 (car values) t)) | |
398 | ||
399 | (defun edit-and-eval-command (prompt command) | |
400 | "Prompting with PROMPT, let user edit COMMAND and eval result. | |
401 | COMMAND is a Lisp expression. Let user edit that expression in | |
402 | the minibuffer, then read and evaluate the result." | |
b387ef9a RS |
403 | (let ((command (read-from-minibuffer prompt |
404 | (prin1-to-string command) | |
405 | read-expression-map t | |
406 | '(command-history . 1)))) | |
2076c87c JB |
407 | (eval command))) |
408 | ||
ebb61177 | 409 | (defun repeat-complex-command (arg) |
2076c87c JB |
410 | "Edit and re-evaluate last complex command, or ARGth from last. |
411 | A complex command is one which used the minibuffer. | |
412 | The command is placed in the minibuffer as a Lisp form for editing. | |
413 | The result is executed, repeating the command as changed. | |
414 | If the command has been changed or is not the most recent previous command | |
415 | it is added to the front of the command history. | |
eb6e9899 RS |
416 | You can use the minibuffer history commands \\<minibuffer-local-map>\\[next-history-element] and \\[previous-history-element] |
417 | to get different commands to edit and resubmit." | |
2076c87c | 418 | (interactive "p") |
ba343182 | 419 | (let ((elt (nth (1- arg) command-history)) |
ebb61177 | 420 | (minibuffer-history-position arg) |
ba343182 | 421 | (minibuffer-history-sexp-flag t) |
2076c87c JB |
422 | newcmd) |
423 | (if elt | |
854c16c5 | 424 | (progn |
eab22e27 | 425 | (setq newcmd |
7908d27c RS |
426 | (let ((print-level nil)) |
427 | (read-from-minibuffer | |
428 | "Redo: " (prin1-to-string elt) read-expression-map t | |
429 | (cons 'command-history arg)))) | |
eab22e27 | 430 | |
db16f109 RS |
431 | ;; If command was added to command-history as a string, |
432 | ;; get rid of that. We want only evallable expressions there. | |
433 | (if (stringp (car command-history)) | |
434 | (setq command-history (cdr command-history))) | |
435 | ||
436 | ;; If command to be redone does not match front of history, | |
437 | ;; add it to the history. | |
438 | (or (equal newcmd (car command-history)) | |
439 | (setq command-history (cons newcmd command-history))) | |
2076c87c JB |
440 | (eval newcmd)) |
441 | (ding)))) | |
e91f80c4 | 442 | \f |
854c16c5 RS |
443 | (defvar minibuffer-history nil |
444 | "Default minibuffer history list. | |
445 | This is used for all minibuffer input | |
446 | except when an alternate history list is specified.") | |
447 | (defvar minibuffer-history-sexp-flag nil | |
c2d4b6d9 | 448 | "Non-nil when doing history operations on `command-history'. |
854c16c5 RS |
449 | More generally, indicates that the history list being acted on |
450 | contains expressions rather than strings.") | |
e91f80c4 RS |
451 | (setq minibuffer-history-variable 'minibuffer-history) |
452 | (setq minibuffer-history-position nil) | |
854c16c5 | 453 | (defvar minibuffer-history-search-history nil) |
e91f80c4 | 454 | |
29929437 | 455 | (mapcar |
d0678801 RM |
456 | (lambda (key-and-command) |
457 | (mapcar | |
458 | (lambda (keymap-and-completionp) | |
459 | ;; Arg is (KEYMAP-SYMBOL . COMPLETION-MAP-P). | |
460 | ;; If the cdr of KEY-AND-COMMAND (the command) is a cons, | |
461 | ;; its car is used if COMPLETION-MAP-P is nil, its cdr if it is t. | |
462 | (define-key (symbol-value (car keymap-and-completionp)) | |
463 | (car key-and-command) | |
464 | (let ((command (cdr key-and-command))) | |
465 | (if (consp command) | |
b5e6f936 RM |
466 | ;; (and ... nil) => ... turns back on the completion-oriented |
467 | ;; history commands which rms turned off since they seem to | |
468 | ;; do things he doesn't like. | |
469 | (if (and (cdr keymap-and-completionp) nil) ;XXX turned off | |
d81362b0 | 470 | (progn (error "EMACS BUG!") (cdr command)) |
d0678801 RM |
471 | (car command)) |
472 | command)))) | |
473 | '((minibuffer-local-map . nil) | |
474 | (minibuffer-local-ns-map . nil) | |
475 | (minibuffer-local-completion-map . t) | |
476 | (minibuffer-local-must-match-map . t) | |
477 | (read-expression-map . nil)))) | |
d81362b0 RM |
478 | '(("\en" . (next-history-element . next-complete-history-element)) |
479 | ([next] . (next-history-element . next-complete-history-element)) | |
480 | ("\ep" . (previous-history-element . previous-complete-history-element)) | |
481 | ([prior] . (previous-history-element . previous-complete-history-element)) | |
29929437 JB |
482 | ("\er" . previous-matching-history-element) |
483 | ("\es" . next-matching-history-element))) | |
e91f80c4 | 484 | |
e91f80c4 | 485 | (defun previous-matching-history-element (regexp n) |
854c16c5 RS |
486 | "Find the previous history element that matches REGEXP. |
487 | \(Previous history elements refer to earlier actions.) | |
488 | With prefix argument N, search for Nth previous match. | |
489 | If N is negative, find the next or Nth next match." | |
490 | (interactive | |
c1172a19 RS |
491 | (let* ((enable-recursive-minibuffers t) |
492 | (minibuffer-history-sexp-flag nil) | |
493 | (regexp (read-from-minibuffer "Previous element matching (regexp): " | |
494 | nil | |
495 | minibuffer-local-map | |
496 | nil | |
497 | 'minibuffer-history-search-history))) | |
498 | ;; Use the last regexp specified, by default, if input is empty. | |
499 | (list (if (string= regexp "") | |
500 | (setcar minibuffer-history-search-history | |
501 | (nth 1 minibuffer-history-search-history)) | |
502 | regexp) | |
854c16c5 | 503 | (prefix-numeric-value current-prefix-arg)))) |
e91f80c4 | 504 | (let ((history (symbol-value minibuffer-history-variable)) |
ccc58657 | 505 | prevpos |
e91f80c4 RS |
506 | (pos minibuffer-history-position)) |
507 | (while (/= n 0) | |
508 | (setq prevpos pos) | |
509 | (setq pos (min (max 1 (+ pos (if (< n 0) -1 1))) (length history))) | |
510 | (if (= pos prevpos) | |
511 | (error (if (= pos 1) | |
ccc58657 RS |
512 | "No later matching history item" |
513 | "No earlier matching history item"))) | |
e91f80c4 RS |
514 | (if (string-match regexp |
515 | (if minibuffer-history-sexp-flag | |
7908d27c RS |
516 | (let ((print-level nil)) |
517 | (prin1-to-string (nth (1- pos) history))) | |
e91f80c4 | 518 | (nth (1- pos) history))) |
854c16c5 | 519 | (setq n (+ n (if (< n 0) 1 -1))))) |
e91f80c4 RS |
520 | (setq minibuffer-history-position pos) |
521 | (erase-buffer) | |
522 | (let ((elt (nth (1- pos) history))) | |
523 | (insert (if minibuffer-history-sexp-flag | |
7908d27c RS |
524 | (let ((print-level nil)) |
525 | (prin1-to-string elt)) | |
e91f80c4 | 526 | elt))) |
854c16c5 RS |
527 | (goto-char (point-min))) |
528 | (if (or (eq (car (car command-history)) 'previous-matching-history-element) | |
529 | (eq (car (car command-history)) 'next-matching-history-element)) | |
530 | (setq command-history (cdr command-history)))) | |
e91f80c4 | 531 | |
e91f80c4 | 532 | (defun next-matching-history-element (regexp n) |
854c16c5 RS |
533 | "Find the next history element that matches REGEXP. |
534 | \(The next history element refers to a more recent action.) | |
535 | With prefix argument N, search for Nth next match. | |
536 | If N is negative, find the previous or Nth previous match." | |
537 | (interactive | |
c1172a19 RS |
538 | (let* ((enable-recursive-minibuffers t) |
539 | (minibuffer-history-sexp-flag nil) | |
540 | (regexp (read-from-minibuffer "Next element matching (regexp): " | |
541 | nil | |
542 | minibuffer-local-map | |
543 | nil | |
544 | 'minibuffer-history-search-history))) | |
545 | ;; Use the last regexp specified, by default, if input is empty. | |
546 | (list (if (string= regexp "") | |
547 | (setcar minibuffer-history-search-history | |
548 | (nth 1 minibuffer-history-search-history)) | |
549 | regexp) | |
854c16c5 | 550 | (prefix-numeric-value current-prefix-arg)))) |
e91f80c4 | 551 | (previous-matching-history-element regexp (- n))) |
2076c87c | 552 | |
ebb61177 RS |
553 | (defun next-history-element (n) |
554 | "Insert the next element of the minibuffer history into the minibuffer." | |
2076c87c | 555 | (interactive "p") |
ebb61177 RS |
556 | (let ((narg (min (max 1 (- minibuffer-history-position n)) |
557 | (length (symbol-value minibuffer-history-variable))))) | |
558 | (if (= minibuffer-history-position narg) | |
559 | (error (if (= minibuffer-history-position 1) | |
ccc58657 RS |
560 | "End of history; no next item" |
561 | "Beginning of history; no preceding item")) | |
2076c87c | 562 | (erase-buffer) |
ebb61177 | 563 | (setq minibuffer-history-position narg) |
ba343182 RS |
564 | (let ((elt (nth (1- minibuffer-history-position) |
565 | (symbol-value minibuffer-history-variable)))) | |
566 | (insert | |
567 | (if minibuffer-history-sexp-flag | |
7908d27c RS |
568 | (let ((print-level nil)) |
569 | (prin1-to-string elt)) | |
770970cb | 570 | elt))) |
2076c87c JB |
571 | (goto-char (point-min))))) |
572 | ||
ebb61177 | 573 | (defun previous-history-element (n) |
3ee3a076 | 574 | "Inserts the previous element of the minibuffer history into the minibuffer." |
2076c87c | 575 | (interactive "p") |
2c5e21c1 | 576 | (next-history-element (- n))) |
d0678801 RM |
577 | |
578 | (defun next-complete-history-element (n) | |
1f6fcec3 | 579 | "Get next element of history which is a completion of minibuffer contents." |
d0678801 | 580 | (interactive "p") |
b5e6f936 RM |
581 | (let ((point-at-start (point))) |
582 | (next-matching-history-element | |
583 | (concat "^" (regexp-quote (buffer-substring (point-min) (point)))) n) | |
584 | ;; next-matching-history-element always puts us at (point-min). | |
585 | ;; Move to the position we were at before changing the buffer contents. | |
586 | ;; This is still sensical, because the text before point has not changed. | |
587 | (goto-char point-at-start))) | |
d0678801 RM |
588 | |
589 | (defun previous-complete-history-element (n) | |
1f6fcec3 RS |
590 | "\ |
591 | Get previous element of history which is a completion of minibuffer contents." | |
d0678801 RM |
592 | (interactive "p") |
593 | (next-complete-history-element (- n))) | |
e91f80c4 | 594 | \f |
2076c87c JB |
595 | (defun goto-line (arg) |
596 | "Goto line ARG, counting from line 1 at beginning of buffer." | |
597 | (interactive "NGoto line: ") | |
5f1a943c | 598 | (setq arg (prefix-numeric-value arg)) |
2076c87c JB |
599 | (save-restriction |
600 | (widen) | |
601 | (goto-char 1) | |
602 | (if (eq selective-display t) | |
603 | (re-search-forward "[\n\C-m]" nil 'end (1- arg)) | |
604 | (forward-line (1- arg))))) | |
605 | ||
606 | ;Put this on C-x u, so we can force that rather than C-_ into startup msg | |
dff7d67f | 607 | (define-function 'advertised-undo 'undo) |
2076c87c JB |
608 | |
609 | (defun undo (&optional arg) | |
610 | "Undo some previous changes. | |
611 | Repeat this command to undo more changes. | |
612 | A numeric argument serves as a repeat count." | |
613 | (interactive "*p") | |
456c617c RS |
614 | ;; If we don't get all the way thru, make last-command indicate that |
615 | ;; for the following command. | |
616 | (setq this-command t) | |
b553cffa RS |
617 | (let ((modified (buffer-modified-p)) |
618 | (recent-save (recent-auto-save-p))) | |
71e40adf JB |
619 | (or (eq (selected-window) (minibuffer-window)) |
620 | (message "Undo!")) | |
2076c87c JB |
621 | (or (eq last-command 'undo) |
622 | (progn (undo-start) | |
623 | (undo-more 1))) | |
2076c87c | 624 | (undo-more (or arg 1)) |
2512c9f0 RS |
625 | ;; Don't specify a position in the undo record for the undo command. |
626 | ;; Instead, undoing this should move point to where the change is. | |
627 | (let ((tail buffer-undo-list) | |
628 | done) | |
629 | (while (and tail (not done) (not (null (car tail)))) | |
630 | (if (integerp (car tail)) | |
631 | (progn | |
632 | (setq done t) | |
633 | (setq buffer-undo-list (delq (car tail) buffer-undo-list)))) | |
634 | (setq tail (cdr tail)))) | |
2076c87c | 635 | (and modified (not (buffer-modified-p)) |
456c617c RS |
636 | (delete-auto-save-file-if-necessary recent-save))) |
637 | ;; If we do get all the way thru, make this-command indicate that. | |
638 | (setq this-command 'undo)) | |
2076c87c | 639 | |
278b0a58 RS |
640 | (defvar pending-undo-list nil |
641 | "Within a run of consecutive undo commands, list remaining to be undone.") | |
642 | ||
2076c87c | 643 | (defun undo-start () |
ff1fbe3e RS |
644 | "Set `pending-undo-list' to the front of the undo list. |
645 | The next call to `undo-more' will undo the most recently made change." | |
2076c87c JB |
646 | (if (eq buffer-undo-list t) |
647 | (error "No undo information in this buffer")) | |
648 | (setq pending-undo-list buffer-undo-list)) | |
649 | ||
650 | (defun undo-more (count) | |
651 | "Undo back N undo-boundaries beyond what was already undone recently. | |
ff1fbe3e RS |
652 | Call `undo-start' to get ready to undo recent changes, |
653 | then call `undo-more' one or more times to undo them." | |
2076c87c JB |
654 | (or pending-undo-list |
655 | (error "No further undo information")) | |
656 | (setq pending-undo-list (primitive-undo count pending-undo-list))) | |
657 | ||
009ef402 RS |
658 | (defvar shell-command-history nil |
659 | "History list for some commands that read shell commands.") | |
660 | ||
d0d74413 | 661 | (defun shell-command (command &optional output-buffer) |
2076c87c JB |
662 | "Execute string COMMAND in inferior shell; display output, if any. |
663 | If COMMAND ends in ampersand, execute it asynchronously. | |
d0d74413 RS |
664 | The output appears in the buffer `*Shell Command*'. |
665 | ||
666 | The optional second argument OUTPUT-BUFFER, if non-nil, | |
667 | says to put the output in some other buffer. | |
668 | If OUTPUT-BUFFER is a buffer or buffer name, put the output there. | |
669 | If OUTPUT-BUFFER is not a buffer and not nil, | |
670 | insert output in current buffer. (This cannot be done asynchronously.) | |
671 | In either case, the output is inserted after point (leaving mark after it)." | |
aa00b92d RS |
672 | (interactive (list (read-from-minibuffer "Shell command: " |
673 | nil nil nil 'shell-command-history) | |
674 | current-prefix-arg)) | |
d0d74413 RS |
675 | (if (and output-buffer |
676 | (not (or (bufferp output-buffer) (stringp output-buffer)))) | |
2076c87c JB |
677 | (progn (barf-if-buffer-read-only) |
678 | (push-mark) | |
679 | ;; We do not use -f for csh; we will not support broken use of | |
680 | ;; .cshrcs. Even the BSD csh manual says to use | |
681 | ;; "if ($?prompt) exit" before things which are not useful | |
682 | ;; non-interactively. Besides, if someone wants their other | |
683 | ;; aliases for shell commands then they can still have them. | |
684 | (call-process shell-file-name nil t nil | |
685 | "-c" command) | |
c3e46f0c RS |
686 | ;; This is like exchange-point-and-mark, but doesn't activate the mark. |
687 | ;; It is cleaner to avoid activation, even though the command | |
688 | ;; loop would deactivate the mark because we inserted text. | |
689 | (goto-char (prog1 (mark t) | |
690 | (set-marker (mark-marker) (point) | |
691 | (current-buffer))))) | |
2076c87c JB |
692 | ;; Preserve the match data in case called from a program. |
693 | (let ((data (match-data))) | |
694 | (unwind-protect | |
695 | (if (string-match "[ \t]*&[ \t]*$" command) | |
696 | ;; Command ending with ampersand means asynchronous. | |
d0d74413 RS |
697 | (let ((buffer (get-buffer-create |
698 | (or output-buffer "*Shell-Command*"))) | |
2076c87c JB |
699 | (directory default-directory) |
700 | proc) | |
701 | ;; Remove the ampersand. | |
702 | (setq command (substring command 0 (match-beginning 0))) | |
703 | ;; If will kill a process, query first. | |
704 | (setq proc (get-buffer-process buffer)) | |
705 | (if proc | |
706 | (if (yes-or-no-p "A command is running. Kill it? ") | |
707 | (kill-process proc) | |
708 | (error "Shell command in progress"))) | |
709 | (save-excursion | |
710 | (set-buffer buffer) | |
a9594ce3 | 711 | (setq buffer-read-only nil) |
2076c87c JB |
712 | (erase-buffer) |
713 | (display-buffer buffer) | |
714 | (setq default-directory directory) | |
715 | (setq proc (start-process "Shell" buffer | |
716 | shell-file-name "-c" command)) | |
3f655c8a | 717 | (setq mode-line-process '(":%s")) |
2076c87c JB |
718 | (set-process-sentinel proc 'shell-command-sentinel) |
719 | (set-process-filter proc 'shell-command-filter) | |
720 | )) | |
721 | (shell-command-on-region (point) (point) command nil)) | |
722 | (store-match-data data))))) | |
723 | ||
724 | ;; We have a sentinel to prevent insertion of a termination message | |
725 | ;; in the buffer itself. | |
726 | (defun shell-command-sentinel (process signal) | |
d7e84efb RS |
727 | (if (and (memq (process-status process) '(exit signal)) |
728 | (buffer-name (process-buffer process))) | |
2076c87c JB |
729 | (progn |
730 | (message "%s: %s." | |
731 | (car (cdr (cdr (process-command process)))) | |
732 | (substring signal 0 -1)) | |
733 | (save-excursion | |
734 | (set-buffer (process-buffer process)) | |
735 | (setq mode-line-process nil)) | |
736 | (delete-process process)))) | |
737 | ||
738 | (defun shell-command-filter (proc string) | |
739 | ;; Do save-excursion by hand so that we can leave point numerically unchanged | |
740 | ;; despite an insertion immediately after it. | |
741 | (let* ((obuf (current-buffer)) | |
742 | (buffer (process-buffer proc)) | |
743 | opoint | |
744 | (window (get-buffer-window buffer)) | |
745 | (pos (window-start window))) | |
746 | (unwind-protect | |
747 | (progn | |
748 | (set-buffer buffer) | |
3886f8e2 RS |
749 | (or (= (point) (point-max)) |
750 | (setq opoint (point))) | |
2076c87c JB |
751 | (goto-char (point-max)) |
752 | (insert-before-markers string)) | |
753 | ;; insert-before-markers moved this marker: set it back. | |
754 | (set-window-start window pos) | |
755 | ;; Finish our save-excursion. | |
3886f8e2 RS |
756 | (if opoint |
757 | (goto-char opoint)) | |
2076c87c JB |
758 | (set-buffer obuf)))) |
759 | ||
d0d74413 RS |
760 | (defun shell-command-on-region (start end command |
761 | &optional output-buffer interactive) | |
2076c87c JB |
762 | "Execute string COMMAND in inferior shell with region as input. |
763 | Normally display output (if any) in temp buffer `*Shell Command Output*'; | |
764 | Prefix arg means replace the region with it. | |
765 | Noninteractive args are START, END, COMMAND, FLAG. | |
766 | Noninteractively FLAG means insert output in place of text from START to END, | |
767 | and put point at the end, but don't alter the mark. | |
768 | ||
769 | If the output is one line, it is displayed in the echo area, | |
770 | but it is nonetheless available in buffer `*Shell Command Output*' | |
771 | even though that buffer is not automatically displayed. If there is no output | |
772 | or output is inserted in the current buffer then `*Shell Command Output*' is | |
d0d74413 RS |
773 | deleted. |
774 | ||
775 | The optional second argument OUTPUT-BUFFER, if non-nil, | |
776 | says to put the output in some other buffer. | |
777 | If OUTPUT-BUFFER is a buffer or buffer name, put the output there. | |
778 | If OUTPUT-BUFFER is not a buffer and not nil, | |
779 | insert output in the current buffer. | |
780 | In either case, the output is inserted after point (leaving mark after it)." | |
082c7686 | 781 | (interactive (list (region-beginning) (region-end) |
aa00b92d RS |
782 | (read-from-minibuffer "Shell command on region: " |
783 | nil nil nil 'shell-command-history) | |
2076c87c JB |
784 | current-prefix-arg |
785 | (prefix-numeric-value current-prefix-arg))) | |
d0d74413 RS |
786 | (if (and output-buffer |
787 | (not (or (bufferp output-buffer) (stringp output-buffer)))) | |
2076c87c JB |
788 | ;; Replace specified region with output from command. |
789 | (let ((swap (and interactive (< (point) (mark))))) | |
790 | ;; Don't muck with mark | |
791 | ;; unless called interactively. | |
792 | (and interactive (push-mark)) | |
793 | (call-process-region start end shell-file-name t t nil | |
794 | "-c" command) | |
b5f7c943 KH |
795 | (let ((shell-buffer (get-buffer "*Shell Command Output*"))) |
796 | (and shell-buffer (not (eq shell-buffer (current-buffer))) | |
797 | (kill-buffer shell-buffer))) | |
2076c87c JB |
798 | (and interactive swap (exchange-point-and-mark))) |
799 | ;; No prefix argument: put the output in a temp buffer, | |
800 | ;; replacing its entire contents. | |
d0d74413 RS |
801 | (let ((buffer (get-buffer-create |
802 | (or output-buffer "*Shell Command Output*"))) | |
34ee0963 RS |
803 | (success nil)) |
804 | (unwind-protect | |
805 | (if (eq buffer (current-buffer)) | |
806 | ;; If the input is the same buffer as the output, | |
807 | ;; delete everything but the specified region, | |
808 | ;; then replace that region with the output. | |
a9594ce3 RS |
809 | (progn (setq buffer-read-only nil) |
810 | (delete-region end (point-max)) | |
34ee0963 RS |
811 | (delete-region (point-min) start) |
812 | (call-process-region (point-min) (point-max) | |
813 | shell-file-name t t nil | |
814 | "-c" command) | |
815 | (setq success t)) | |
816 | ;; Clear the output buffer, then run the command with output there. | |
817 | (save-excursion | |
818 | (set-buffer buffer) | |
a9594ce3 | 819 | (setq buffer-read-only nil) |
34ee0963 RS |
820 | (erase-buffer)) |
821 | (call-process-region start end shell-file-name | |
822 | nil buffer nil | |
823 | "-c" command) | |
824 | (setq success t)) | |
825 | ;; Report the amount of output. | |
826 | (let ((lines (save-excursion | |
827 | (set-buffer buffer) | |
828 | (if (= (buffer-size) 0) | |
829 | 0 | |
830 | (count-lines (point-min) (point-max)))))) | |
831 | (cond ((= lines 0) | |
832 | (if success | |
833 | (message "(Shell command completed with no output)")) | |
834 | (kill-buffer buffer)) | |
835 | ((and success (= lines 1)) | |
836 | (message "%s" | |
837 | (save-excursion | |
838 | (set-buffer buffer) | |
839 | (goto-char (point-min)) | |
840 | (buffer-substring (point) | |
4ec982c5 | 841 | (progn (end-of-line) (point)))))) |
34ee0963 RS |
842 | (t |
843 | (set-window-start (display-buffer buffer) 1)))))))) | |
2076c87c JB |
844 | \f |
845 | (defun universal-argument () | |
846 | "Begin a numeric argument for the following command. | |
847 | Digits or minus sign following \\[universal-argument] make up the numeric argument. | |
848 | \\[universal-argument] following the digits or minus sign ends the argument. | |
849 | \\[universal-argument] without digits or minus sign provides 4 as argument. | |
850 | Repeating \\[universal-argument] without digits or minus sign | |
851 | multiplies the argument by 4 each time." | |
852 | (interactive nil) | |
c637ae6f JB |
853 | (let ((factor 4) |
854 | key) | |
70e14c01 JB |
855 | ;; (describe-arg (list factor) 1) |
856 | (setq key (read-key-sequence nil t)) | |
c637ae6f JB |
857 | (while (equal (key-binding key) 'universal-argument) |
858 | (setq factor (* 4 factor)) | |
70e14c01 JB |
859 | ;; (describe-arg (list factor) 1) |
860 | (setq key (read-key-sequence nil t))) | |
c637ae6f JB |
861 | (prefix-arg-internal key factor nil))) |
862 | ||
863 | (defun prefix-arg-internal (key factor value) | |
2076c87c JB |
864 | (let ((sign 1)) |
865 | (if (and (numberp value) (< value 0)) | |
866 | (setq sign -1 value (- value))) | |
867 | (if (eq value '-) | |
868 | (setq sign -1 value nil)) | |
70e14c01 | 869 | ;; (describe-arg value sign) |
c637ae6f JB |
870 | (while (equal key "-") |
871 | (setq sign (- sign) factor nil) | |
70e14c01 JB |
872 | ;; (describe-arg value sign) |
873 | (setq key (read-key-sequence nil t))) | |
bd307392 JB |
874 | (while (and (stringp key) |
875 | (= (length key) 1) | |
c637ae6f JB |
876 | (not (string< key "0")) |
877 | (not (string< "9" key))) | |
878 | (setq value (+ (* (if (numberp value) value 0) 10) | |
879 | (- (aref key 0) ?0)) | |
880 | factor nil) | |
70e14c01 JB |
881 | ;; (describe-arg value sign) |
882 | (setq key (read-key-sequence nil t))) | |
2076c87c | 883 | (setq prefix-arg |
c637ae6f | 884 | (cond (factor (list factor)) |
2076c87c JB |
885 | ((numberp value) (* value sign)) |
886 | ((= sign -1) '-))) | |
c637ae6f JB |
887 | ;; Calling universal-argument after digits |
888 | ;; terminates the argument but is ignored. | |
889 | (if (eq (key-binding key) 'universal-argument) | |
890 | (progn | |
891 | (describe-arg value sign) | |
70e14c01 | 892 | (setq key (read-key-sequence nil t)))) |
d70202c0 | 893 | (setq unread-command-events (listify-key-sequence key)))) |
c637ae6f JB |
894 | |
895 | (defun describe-arg (value sign) | |
896 | (cond ((numberp value) | |
897 | (message "Arg: %d" (* value sign))) | |
898 | ((consp value) | |
899 | (message "Arg: [%d]" (car value))) | |
900 | ((< sign 0) | |
901 | (message "Arg: -")))) | |
2076c87c JB |
902 | |
903 | (defun digit-argument (arg) | |
904 | "Part of the numeric argument for the next command. | |
905 | \\[universal-argument] following digits or minus sign ends the argument." | |
906 | (interactive "P") | |
c637ae6f JB |
907 | (prefix-arg-internal (char-to-string (logand last-command-char ?\177)) |
908 | nil arg)) | |
2076c87c JB |
909 | |
910 | (defun negative-argument (arg) | |
911 | "Begin a negative numeric argument for the next command. | |
912 | \\[universal-argument] following digits or minus sign ends the argument." | |
913 | (interactive "P") | |
c637ae6f | 914 | (prefix-arg-internal "-" nil arg)) |
2076c87c JB |
915 | \f |
916 | (defun forward-to-indentation (arg) | |
917 | "Move forward ARG lines and position at first nonblank character." | |
918 | (interactive "p") | |
919 | (forward-line arg) | |
920 | (skip-chars-forward " \t")) | |
921 | ||
922 | (defun backward-to-indentation (arg) | |
923 | "Move backward ARG lines and position at first nonblank character." | |
924 | (interactive "p") | |
925 | (forward-line (- arg)) | |
926 | (skip-chars-forward " \t")) | |
927 | ||
38ebcf29 | 928 | (defvar kill-whole-line nil |
dff7d67f | 929 | "*If non-nil, `kill-line' with no arg at beg of line kills the whole line.") |
38ebcf29 | 930 | |
2076c87c | 931 | (defun kill-line (&optional arg) |
dff7d67f | 932 | "Kill the rest of the current line; if no nonblanks there, kill thru newline. |
2076c87c JB |
933 | With prefix argument, kill that many lines from point. |
934 | Negative arguments kill lines backward. | |
935 | ||
936 | When calling from a program, nil means \"no arg\", | |
dff7d67f RS |
937 | a number counts as a prefix arg. |
938 | ||
939 | If `kill-whole-line' is non-nil, then kill the whole line | |
940 | when given no argument at the beginning of a line." | |
2076c87c JB |
941 | (interactive "P") |
942 | (kill-region (point) | |
e6291fe1 RS |
943 | ;; It is better to move point to the other end of the kill |
944 | ;; before killing. That way, in a read-only buffer, point | |
945 | ;; moves across the text that is copied to the kill ring. | |
946 | ;; The choice has no effect on undo now that undo records | |
947 | ;; the value of point from before the command was run. | |
948 | (progn | |
2076c87c JB |
949 | (if arg |
950 | (forward-line (prefix-numeric-value arg)) | |
951 | (if (eobp) | |
952 | (signal 'end-of-buffer nil)) | |
38ebcf29 | 953 | (if (or (looking-at "[ \t]*$") (and kill-whole-line (bolp))) |
2076c87c JB |
954 | (forward-line 1) |
955 | (end-of-line))) | |
956 | (point)))) | |
957 | \f | |
70e14c01 JB |
958 | ;;;; Window system cut and paste hooks. |
959 | ||
960 | (defvar interprogram-cut-function nil | |
961 | "Function to call to make a killed region available to other programs. | |
962 | ||
963 | Most window systems provide some sort of facility for cutting and | |
9f112a3d RS |
964 | pasting text between the windows of different programs. |
965 | This variable holds a function that Emacs calls whenever text | |
966 | is put in the kill ring, to make the new kill available to other | |
70e14c01 JB |
967 | programs. |
968 | ||
9f112a3d RS |
969 | The function takes one or two arguments. |
970 | The first argument, TEXT, is a string containing | |
971 | the text which should be made available. | |
972 | The second, PUSH, if non-nil means this is a \"new\" kill; | |
973 | nil means appending to an \"old\" kill.") | |
70e14c01 JB |
974 | |
975 | (defvar interprogram-paste-function nil | |
976 | "Function to call to get text cut from other programs. | |
977 | ||
978 | Most window systems provide some sort of facility for cutting and | |
9f112a3d RS |
979 | pasting text between the windows of different programs. |
980 | This variable holds a function that Emacs calls to obtain | |
70e14c01 JB |
981 | text that other programs have provided for pasting. |
982 | ||
983 | The function should be called with no arguments. If the function | |
984 | returns nil, then no other program has provided such text, and the top | |
985 | of the Emacs kill ring should be used. If the function returns a | |
daa37602 JB |
986 | string, that string should be put in the kill ring as the latest kill. |
987 | ||
988 | Note that the function should return a string only if a program other | |
989 | than Emacs has provided a string for pasting; if Emacs provided the | |
990 | most recent string, the function should return nil. If it is | |
991 | difficult to tell whether Emacs or some other program provided the | |
992 | current string, it is probably good enough to return nil if the string | |
993 | is equal (according to `string=') to the last text Emacs provided.") | |
70e14c01 JB |
994 | |
995 | ||
996 | \f | |
997 | ;;;; The kill ring data structure. | |
2076c87c JB |
998 | |
999 | (defvar kill-ring nil | |
70e14c01 JB |
1000 | "List of killed text sequences. |
1001 | Since the kill ring is supposed to interact nicely with cut-and-paste | |
1002 | facilities offered by window systems, use of this variable should | |
1003 | interact nicely with `interprogram-cut-function' and | |
1004 | `interprogram-paste-function'. The functions `kill-new', | |
1005 | `kill-append', and `current-kill' are supposed to implement this | |
1006 | interaction; you may want to use them instead of manipulating the kill | |
1007 | ring directly.") | |
2076c87c JB |
1008 | |
1009 | (defconst kill-ring-max 30 | |
1010 | "*Maximum length of kill ring before oldest elements are thrown away.") | |
1011 | ||
1012 | (defvar kill-ring-yank-pointer nil | |
1013 | "The tail of the kill ring whose car is the last thing yanked.") | |
1014 | ||
f914dc91 | 1015 | (defun kill-new (string &optional replace) |
70e14c01 JB |
1016 | "Make STRING the latest kill in the kill ring. |
1017 | Set the kill-ring-yank pointer to point to it. | |
f914dc91 KH |
1018 | If `interprogram-cut-function' is non-nil, apply it to STRING. |
1019 | Optional second argument REPLACE non-nil means that STRING will replace | |
1020 | the front of the kill ring, rather than being added to the list." | |
f1d01ba2 KH |
1021 | (and (fboundp 'menu-bar-update-yank-menu) |
1022 | (menu-bar-update-yank-menu string (and replace (car kill-ring)))) | |
f914dc91 KH |
1023 | (if replace |
1024 | (setcar kill-ring string) | |
1025 | (setq kill-ring (cons string kill-ring)) | |
1026 | (if (> (length kill-ring) kill-ring-max) | |
1027 | (setcdr (nthcdr (1- kill-ring-max) kill-ring) nil))) | |
70e14c01 JB |
1028 | (setq kill-ring-yank-pointer kill-ring) |
1029 | (if interprogram-cut-function | |
9f112a3d | 1030 | (funcall interprogram-cut-function string t))) |
70e14c01 | 1031 | |
2076c87c | 1032 | (defun kill-append (string before-p) |
70e14c01 JB |
1033 | "Append STRING to the end of the latest kill in the kill ring. |
1034 | If BEFORE-P is non-nil, prepend STRING to the kill. | |
88c1aa79 | 1035 | If `interprogram-cut-function' is set, pass the resulting kill to |
70e14c01 | 1036 | it." |
f914dc91 KH |
1037 | (kill-new (if before-p |
1038 | (concat string (car kill-ring)) | |
1039 | (concat (car kill-ring) string)) t)) | |
70e14c01 JB |
1040 | |
1041 | (defun current-kill (n &optional do-not-move) | |
1042 | "Rotate the yanking point by N places, and then return that kill. | |
1043 | If N is zero, `interprogram-paste-function' is set, and calling it | |
1044 | returns a string, then that string is added to the front of the | |
1045 | kill ring and returned as the latest kill. | |
1046 | If optional arg DO-NOT-MOVE is non-nil, then don't actually move the | |
1047 | yanking point; just return the Nth kill forward." | |
1048 | (let ((interprogram-paste (and (= n 0) | |
1049 | interprogram-paste-function | |
1050 | (funcall interprogram-paste-function)))) | |
1051 | (if interprogram-paste | |
1052 | (progn | |
1053 | ;; Disable the interprogram cut function when we add the new | |
1054 | ;; text to the kill ring, so Emacs doesn't try to own the | |
1055 | ;; selection, with identical text. | |
1056 | (let ((interprogram-cut-function nil)) | |
1057 | (kill-new interprogram-paste)) | |
1058 | interprogram-paste) | |
1059 | (or kill-ring (error "Kill ring is empty")) | |
47096a67 PE |
1060 | (let ((ARGth-kill-element |
1061 | (nthcdr (mod (- n (length kill-ring-yank-pointer)) | |
1062 | (length kill-ring)) | |
1063 | kill-ring))) | |
70e14c01 JB |
1064 | (or do-not-move |
1065 | (setq kill-ring-yank-pointer ARGth-kill-element)) | |
1066 | (car ARGth-kill-element))))) | |
c88ab9ce | 1067 | |
c88ab9ce | 1068 | |
70e14c01 JB |
1069 | \f |
1070 | ;;;; Commands for manipulating the kill ring. | |
c88ab9ce | 1071 | |
e6291fe1 RS |
1072 | (defvar kill-read-only-ok nil |
1073 | "*Non-nil means don't signal an error for killing read-only text.") | |
1074 | ||
2076c87c JB |
1075 | (defun kill-region (beg end) |
1076 | "Kill between point and mark. | |
1077 | The text is deleted but saved in the kill ring. | |
1078 | The command \\[yank] can retrieve it from there. | |
1079 | \(If you want to kill and then yank immediately, use \\[copy-region-as-kill].) | |
2aa7a8bf JB |
1080 | If the buffer is read-only, Emacs will beep and refrain from deleting |
1081 | the text, but put the text in the kill ring anyway. This means that | |
1082 | you can use the killing commands to copy text from a read-only buffer. | |
2076c87c JB |
1083 | |
1084 | This is the primitive for programs to kill text (as opposed to deleting it). | |
1085 | Supply two arguments, character numbers indicating the stretch of text | |
1086 | to be killed. | |
1087 | Any command that calls this function is a \"kill command\". | |
1088 | If the previous command was also a kill command, | |
1089 | the text killed this time appends to the text killed last time | |
1090 | to make one entry in the kill ring." | |
2aa7a8bf | 1091 | (interactive "r") |
70e14c01 | 1092 | (cond |
2aa7a8bf JB |
1093 | |
1094 | ;; If the buffer is read-only, we should beep, in case the person | |
1095 | ;; just isn't aware of this. However, there's no harm in putting | |
1096 | ;; the region's text in the kill ring, anyway. | |
e6291fe1 RS |
1097 | ((or (and buffer-read-only (not inhibit-read-only)) |
1098 | (text-property-not-all beg end 'read-only nil)) | |
2aa7a8bf | 1099 | (copy-region-as-kill beg end) |
1537a263 | 1100 | ;; This should always barf, and give us the correct error. |
e6291fe1 RS |
1101 | (if kill-read-only-ok |
1102 | (message "Read only text copied to kill ring") | |
1103 | (barf-if-buffer-read-only))) | |
2aa7a8bf JB |
1104 | |
1105 | ;; In certain cases, we can arrange for the undo list and the kill | |
1106 | ;; ring to share the same string object. This code does that. | |
70e14c01 JB |
1107 | ((not (or (eq buffer-undo-list t) |
1108 | (eq last-command 'kill-region) | |
7e37cd30 | 1109 | (equal beg end))) |
70e14c01 | 1110 | ;; Don't let the undo list be truncated before we can even access it. |
12bcd3b6 RS |
1111 | (let ((undo-strong-limit (+ (- (max beg end) (min beg end)) 100)) |
1112 | (old-list buffer-undo-list) | |
1113 | tail) | |
70e14c01 | 1114 | (delete-region beg end) |
12bcd3b6 RS |
1115 | ;; Search back in buffer-undo-list for this string, |
1116 | ;; in case a change hook made property changes. | |
1117 | (setq tail buffer-undo-list) | |
1118 | (while (not (stringp (car (car tail)))) | |
1119 | (setq tail (cdr tail))) | |
70e14c01 JB |
1120 | ;; Take the same string recorded for undo |
1121 | ;; and put it in the kill-ring. | |
12bcd3b6 | 1122 | (kill-new (car (car tail))) |
70e14c01 | 1123 | (setq this-command 'kill-region))) |
2aa7a8bf | 1124 | |
70e14c01 | 1125 | (t |
2076c87c | 1126 | (copy-region-as-kill beg end) |
70e14c01 | 1127 | (delete-region beg end)))) |
2076c87c | 1128 | |
2076c87c JB |
1129 | (defun copy-region-as-kill (beg end) |
1130 | "Save the region as if killed, but don't kill it. | |
46947372 JB |
1131 | If `interprogram-cut-function' is non-nil, also save the text for a window |
1132 | system cut and paste." | |
2076c87c JB |
1133 | (interactive "r") |
1134 | (if (eq last-command 'kill-region) | |
1135 | (kill-append (buffer-substring beg end) (< end beg)) | |
70e14c01 JB |
1136 | (kill-new (buffer-substring beg end))) |
1137 | (setq this-command 'kill-region) | |
2076c87c JB |
1138 | nil) |
1139 | ||
1140 | (defun kill-ring-save (beg end) | |
0964e562 | 1141 | "Save the region as if killed, but don't kill it. |
230c6b36 | 1142 | This command is similar to `copy-region-as-kill', except that it gives |
0964e562 JB |
1143 | visual feedback indicating the extent of the region being copied. |
1144 | If `interprogram-cut-function' is non-nil, also save the text for a window | |
1145 | system cut and paste." | |
2076c87c JB |
1146 | (interactive "r") |
1147 | (copy-region-as-kill beg end) | |
3a801d0c | 1148 | (if (interactive-p) |
66050f10 RS |
1149 | (let ((other-end (if (= (point) beg) end beg)) |
1150 | (opoint (point)) | |
1151 | ;; Inhibit quitting so we can make a quit here | |
1152 | ;; look like a C-g typed as a command. | |
1153 | (inhibit-quit t)) | |
1154 | (if (pos-visible-in-window-p other-end (selected-window)) | |
1155 | (progn | |
1156 | ;; Swap point and mark. | |
1157 | (set-marker (mark-marker) (point) (current-buffer)) | |
1158 | (goto-char other-end) | |
1159 | (sit-for 1) | |
1160 | ;; Swap back. | |
1161 | (set-marker (mark-marker) other-end (current-buffer)) | |
1162 | (goto-char opoint) | |
1163 | ;; If user quit, deactivate the mark | |
1164 | ;; as C-g would as a command. | |
e4e593ae | 1165 | (and quit-flag mark-active |
fcadf1c7 | 1166 | (deactivate-mark))) |
66050f10 RS |
1167 | (let* ((killed-text (current-kill 0)) |
1168 | (message-len (min (length killed-text) 40))) | |
1169 | (if (= (point) beg) | |
1170 | ;; Don't say "killed"; that is misleading. | |
1171 | (message "Saved text until \"%s\"" | |
1172 | (substring killed-text (- message-len))) | |
1173 | (message "Saved text from \"%s\"" | |
1174 | (substring killed-text 0 message-len)))))))) | |
2076c87c JB |
1175 | |
1176 | (defun append-next-kill () | |
ff1fbe3e | 1177 | "Cause following command, if it kills, to append to previous kill." |
2076c87c JB |
1178 | (interactive) |
1179 | (if (interactive-p) | |
1180 | (progn | |
1181 | (setq this-command 'kill-region) | |
1182 | (message "If the next command is a kill, it will append")) | |
1183 | (setq last-command 'kill-region))) | |
1184 | ||
2076c87c | 1185 | (defun yank-pop (arg) |
ff1fbe3e RS |
1186 | "Replace just-yanked stretch of killed text with a different stretch. |
1187 | This command is allowed only immediately after a `yank' or a `yank-pop'. | |
2076c87c | 1188 | At such a time, the region contains a stretch of reinserted |
ff1fbe3e | 1189 | previously-killed text. `yank-pop' deletes that text and inserts in its |
2076c87c JB |
1190 | place a different stretch of killed text. |
1191 | ||
1192 | With no argument, the previous kill is inserted. | |
ff1fbe3e RS |
1193 | With argument N, insert the Nth previous kill. |
1194 | If N is negative, this is a more recent kill. | |
2076c87c JB |
1195 | |
1196 | The sequence of kills wraps around, so that after the oldest one | |
1197 | comes the newest one." | |
1198 | (interactive "*p") | |
1199 | (if (not (eq last-command 'yank)) | |
1200 | (error "Previous command was not a yank")) | |
1201 | (setq this-command 'yank) | |
9a1277dd RS |
1202 | (let ((before (< (point) (mark t)))) |
1203 | (delete-region (point) (mark t)) | |
fd0f4056 | 1204 | (set-marker (mark-marker) (point) (current-buffer)) |
70e14c01 | 1205 | (insert (current-kill arg)) |
fd0f4056 RS |
1206 | (if before |
1207 | ;; This is like exchange-point-and-mark, but doesn't activate the mark. | |
1208 | ;; It is cleaner to avoid activation, even though the command | |
1209 | ;; loop would deactivate the mark because we inserted text. | |
1210 | (goto-char (prog1 (mark t) | |
1211 | (set-marker (mark-marker) (point) (current-buffer)))))) | |
0964e562 | 1212 | nil) |
2076c87c JB |
1213 | |
1214 | (defun yank (&optional arg) | |
1215 | "Reinsert the last stretch of killed text. | |
1216 | More precisely, reinsert the stretch of killed text most recently | |
ff1fbe3e RS |
1217 | killed OR yanked. Put point at end, and set mark at beginning. |
1218 | With just C-u as argument, same but put point at beginning (and mark at end). | |
1219 | With argument N, reinsert the Nth most recently killed stretch of killed | |
2076c87c JB |
1220 | text. |
1221 | See also the command \\[yank-pop]." | |
1222 | (interactive "*P") | |
456c617c RS |
1223 | ;; If we don't get all the way thru, make last-command indicate that |
1224 | ;; for the following command. | |
1225 | (setq this-command t) | |
2076c87c | 1226 | (push-mark (point)) |
70e14c01 JB |
1227 | (insert (current-kill (cond |
1228 | ((listp arg) 0) | |
1229 | ((eq arg '-) -1) | |
1230 | (t (1- arg))))) | |
2076c87c | 1231 | (if (consp arg) |
fd0f4056 RS |
1232 | ;; This is like exchange-point-and-mark, but doesn't activate the mark. |
1233 | ;; It is cleaner to avoid activation, even though the command | |
1234 | ;; loop would deactivate the mark because we inserted text. | |
1235 | (goto-char (prog1 (mark t) | |
1236 | (set-marker (mark-marker) (point) (current-buffer))))) | |
456c617c RS |
1237 | ;; If we do get all the way thru, make this-command indicate that. |
1238 | (setq this-command 'yank) | |
0964e562 | 1239 | nil) |
70e14c01 JB |
1240 | |
1241 | (defun rotate-yank-pointer (arg) | |
1242 | "Rotate the yanking point in the kill ring. | |
1243 | With argument, rotate that many kills forward (or backward, if negative)." | |
1244 | (interactive "p") | |
1245 | (current-kill arg)) | |
1246 | ||
2076c87c JB |
1247 | \f |
1248 | (defun insert-buffer (buffer) | |
1249 | "Insert after point the contents of BUFFER. | |
1250 | Puts mark after the inserted text. | |
1251 | BUFFER may be a buffer or a buffer name." | |
58ff020d | 1252 | (interactive (list (progn (barf-if-buffer-read-only) |
8be055fd RS |
1253 | (read-buffer "Insert buffer: " |
1254 | (other-buffer (current-buffer) t) | |
1255 | t)))) | |
2076c87c JB |
1256 | (or (bufferp buffer) |
1257 | (setq buffer (get-buffer buffer))) | |
1258 | (let (start end newmark) | |
1259 | (save-excursion | |
1260 | (save-excursion | |
1261 | (set-buffer buffer) | |
1262 | (setq start (point-min) end (point-max))) | |
1263 | (insert-buffer-substring buffer start end) | |
1264 | (setq newmark (point))) | |
1537a263 JB |
1265 | (push-mark newmark)) |
1266 | nil) | |
2076c87c JB |
1267 | |
1268 | (defun append-to-buffer (buffer start end) | |
1269 | "Append to specified buffer the text of the region. | |
1270 | It is inserted into that buffer before its point. | |
1271 | ||
1272 | When calling from a program, give three arguments: | |
1273 | BUFFER (or buffer name), START and END. | |
1274 | START and END specify the portion of the current buffer to be copied." | |
70e14c01 | 1275 | (interactive |
23efee2c RS |
1276 | (list (read-buffer "Append to buffer: " (other-buffer nil t)) |
1277 | (region-beginning) (region-end))) | |
2076c87c JB |
1278 | (let ((oldbuf (current-buffer))) |
1279 | (save-excursion | |
1280 | (set-buffer (get-buffer-create buffer)) | |
1281 | (insert-buffer-substring oldbuf start end)))) | |
1282 | ||
1283 | (defun prepend-to-buffer (buffer start end) | |
1284 | "Prepend to specified buffer the text of the region. | |
1285 | It is inserted into that buffer after its point. | |
1286 | ||
1287 | When calling from a program, give three arguments: | |
1288 | BUFFER (or buffer name), START and END. | |
1289 | START and END specify the portion of the current buffer to be copied." | |
1290 | (interactive "BPrepend to buffer: \nr") | |
1291 | (let ((oldbuf (current-buffer))) | |
1292 | (save-excursion | |
1293 | (set-buffer (get-buffer-create buffer)) | |
1294 | (save-excursion | |
1295 | (insert-buffer-substring oldbuf start end))))) | |
1296 | ||
1297 | (defun copy-to-buffer (buffer start end) | |
1298 | "Copy to specified buffer the text of the region. | |
1299 | It is inserted into that buffer, replacing existing text there. | |
1300 | ||
1301 | When calling from a program, give three arguments: | |
1302 | BUFFER (or buffer name), START and END. | |
1303 | START and END specify the portion of the current buffer to be copied." | |
1304 | (interactive "BCopy to buffer: \nr") | |
1305 | (let ((oldbuf (current-buffer))) | |
1306 | (save-excursion | |
1307 | (set-buffer (get-buffer-create buffer)) | |
1308 | (erase-buffer) | |
1309 | (save-excursion | |
1310 | (insert-buffer-substring oldbuf start end))))) | |
1311 | \f | |
0bf0c097 RS |
1312 | (defvar mark-even-if-inactive nil |
1313 | "*Non-nil means you can use the mark even when inactive. | |
1314 | This option makes a difference in Transient Mark mode. | |
1315 | When the option is non-nil, deactivation of the mark | |
1316 | turns off region highlighting, but commands that use the mark | |
1317 | behave as if the mark were still active.") | |
1318 | ||
62d1c1fc RM |
1319 | (put 'mark-inactive 'error-conditions '(mark-inactive error)) |
1320 | (put 'mark-inactive 'error-message "The mark is not active now") | |
1321 | ||
af39530e | 1322 | (defun mark (&optional force) |
c7c8b31e | 1323 | "Return this buffer's mark value as integer; error if mark inactive. |
af39530e | 1324 | If optional argument FORCE is non-nil, access the mark value |
c7c8b31e RS |
1325 | even if the mark is not currently active, and return nil |
1326 | if there is no mark at all. | |
af39530e | 1327 | |
2076c87c JB |
1328 | If you are using this in an editing command, you are most likely making |
1329 | a mistake; see the documentation of `set-mark'." | |
0bf0c097 | 1330 | (if (or force mark-active mark-even-if-inactive) |
af39530e | 1331 | (marker-position (mark-marker)) |
62d1c1fc | 1332 | (signal 'mark-inactive nil))) |
2076c87c | 1333 | |
19d35374 RM |
1334 | ;; Many places set mark-active directly, and several of them failed to also |
1335 | ;; run deactivate-mark-hook. This shorthand should simplify. | |
1336 | (defsubst deactivate-mark () | |
1337 | "Deactivate the mark by setting `mark-active' to nil. | |
fcadf1c7 | 1338 | \(That makes a difference only in Transient Mark mode.) |
19d35374 | 1339 | Also runs the hook `deactivate-mark-hook'." |
a4b9d3da RS |
1340 | (if transient-mark-mode |
1341 | (progn | |
1342 | (setq mark-active nil) | |
1343 | (run-hooks 'deactivate-mark-hook)))) | |
19d35374 | 1344 | |
2076c87c JB |
1345 | (defun set-mark (pos) |
1346 | "Set this buffer's mark to POS. Don't use this function! | |
1347 | That is to say, don't use this function unless you want | |
1348 | the user to see that the mark has moved, and you want the previous | |
1349 | mark position to be lost. | |
1350 | ||
1351 | Normally, when a new mark is set, the old one should go on the stack. | |
1352 | This is why most applications should use push-mark, not set-mark. | |
1353 | ||
ff1fbe3e | 1354 | Novice Emacs Lisp programmers often try to use the mark for the wrong |
2076c87c JB |
1355 | purposes. The mark saves a location for the user's convenience. |
1356 | Most editing commands should not alter the mark. | |
1357 | To remember a location for internal use in the Lisp program, | |
1358 | store it in a Lisp variable. Example: | |
1359 | ||
1360 | (let ((beg (point))) (forward-line 1) (delete-region beg (point)))." | |
1361 | ||
fcadf1c7 RS |
1362 | (if pos |
1363 | (progn | |
1364 | (setq mark-active t) | |
1365 | (run-hooks 'activate-mark-hook) | |
1366 | (set-marker (mark-marker) pos (current-buffer))) | |
24c22852 RS |
1367 | ;; Normally we never clear mark-active except in Transient Mark mode. |
1368 | ;; But when we actually clear out the mark value too, | |
1369 | ;; we must clear mark-active in any mode. | |
1370 | (setq mark-active nil) | |
1371 | (run-hooks 'deactivate-mark-hook) | |
1372 | (set-marker (mark-marker) nil))) | |
2076c87c JB |
1373 | |
1374 | (defvar mark-ring nil | |
e55e2267 | 1375 | "The list of former marks of the current buffer, most recent first.") |
2076c87c | 1376 | (make-variable-buffer-local 'mark-ring) |
e55e2267 | 1377 | (put 'mark-ring 'permanent-local t) |
2076c87c JB |
1378 | |
1379 | (defconst mark-ring-max 16 | |
1380 | "*Maximum size of mark ring. Start discarding off end if gets this big.") | |
1381 | ||
dc029f0b RM |
1382 | (defvar global-mark-ring nil |
1383 | "The list of saved global marks, most recent first.") | |
1384 | ||
1385 | (defconst global-mark-ring-max 16 | |
1386 | "*Maximum size of global mark ring. \ | |
1387 | Start discarding off end if gets this big.") | |
1388 | ||
2076c87c JB |
1389 | (defun set-mark-command (arg) |
1390 | "Set mark at where point is, or jump to mark. | |
dc029f0b RM |
1391 | With no prefix argument, set mark, push old mark position on local mark |
1392 | ring, and push mark on global mark ring. | |
1393 | With argument, jump to mark, and pop a new position for mark off the ring | |
1394 | \(does not affect global mark ring\). | |
2076c87c | 1395 | |
ff1fbe3e | 1396 | Novice Emacs Lisp programmers often try to use the mark for the wrong |
2076c87c JB |
1397 | purposes. See the documentation of `set-mark' for more information." |
1398 | (interactive "P") | |
1399 | (if (null arg) | |
9a1277dd | 1400 | (progn |
fd0f4056 | 1401 | (push-mark nil nil t)) |
af39530e | 1402 | (if (null (mark t)) |
2076c87c | 1403 | (error "No mark set in this buffer") |
9a1277dd | 1404 | (goto-char (mark t)) |
2076c87c JB |
1405 | (pop-mark)))) |
1406 | ||
fd0f4056 | 1407 | (defun push-mark (&optional location nomsg activate) |
2076c87c | 1408 | "Set mark at LOCATION (point, by default) and push old mark on mark ring. |
f1382a3d RM |
1409 | If the last global mark pushed was not in the current buffer, |
1410 | also push LOCATION on the global mark ring. | |
fd0f4056 | 1411 | Display `Mark set' unless the optional second arg NOMSG is non-nil. |
8cdc660f | 1412 | In Transient Mark mode, activate mark if optional third arg ACTIVATE non-nil. |
2076c87c | 1413 | |
ff1fbe3e | 1414 | Novice Emacs Lisp programmers often try to use the mark for the wrong |
9a1277dd RS |
1415 | purposes. See the documentation of `set-mark' for more information. |
1416 | ||
1417 | In Transient Mark mode, this does not activate the mark." | |
af39530e | 1418 | (if (null (mark t)) |
2076c87c JB |
1419 | nil |
1420 | (setq mark-ring (cons (copy-marker (mark-marker)) mark-ring)) | |
1421 | (if (> (length mark-ring) mark-ring-max) | |
1422 | (progn | |
1423 | (move-marker (car (nthcdr mark-ring-max mark-ring)) nil) | |
1424 | (setcdr (nthcdr (1- mark-ring-max) mark-ring) nil)))) | |
9a1277dd | 1425 | (set-marker (mark-marker) (or location (point)) (current-buffer)) |
dc029f0b | 1426 | ;; Now push the mark on the global mark ring. |
f1382a3d | 1427 | (if (and global-mark-ring |
e08d3f7c | 1428 | (eq (marker-buffer (car global-mark-ring)) (current-buffer))) |
f1382a3d RM |
1429 | ;; The last global mark pushed was in this same buffer. |
1430 | ;; Don't push another one. | |
1431 | nil | |
1432 | (setq global-mark-ring (cons (copy-marker (mark-marker)) global-mark-ring)) | |
dc029f0b RM |
1433 | (if (> (length global-mark-ring) global-mark-ring-max) |
1434 | (progn | |
1435 | (move-marker (car (nthcdr global-mark-ring-max global-mark-ring)) | |
1436 | nil) | |
f1382a3d | 1437 | (setcdr (nthcdr (1- global-mark-ring-max) global-mark-ring) nil)))) |
2076c87c JB |
1438 | (or nomsg executing-macro (> (minibuffer-depth) 0) |
1439 | (message "Mark set")) | |
8cdc660f RS |
1440 | (if (or activate (not transient-mark-mode)) |
1441 | (set-mark (mark t))) | |
2076c87c JB |
1442 | nil) |
1443 | ||
1444 | (defun pop-mark () | |
1445 | "Pop off mark ring into the buffer's actual mark. | |
1446 | Does not set point. Does nothing if mark ring is empty." | |
1447 | (if mark-ring | |
1448 | (progn | |
1449 | (setq mark-ring (nconc mark-ring (list (copy-marker (mark-marker))))) | |
9a1277dd | 1450 | (set-marker (mark-marker) (+ 0 (car mark-ring)) (current-buffer)) |
19d35374 | 1451 | (deactivate-mark) |
2076c87c | 1452 | (move-marker (car mark-ring) nil) |
9a1277dd | 1453 | (if (null (mark t)) (ding)) |
2076c87c JB |
1454 | (setq mark-ring (cdr mark-ring))))) |
1455 | ||
dff7d67f | 1456 | (define-function 'exchange-dot-and-mark 'exchange-point-and-mark) |
2076c87c | 1457 | (defun exchange-point-and-mark () |
af39530e RS |
1458 | "Put the mark where point is now, and point where the mark is now. |
1459 | This command works even when the mark is not active, | |
1460 | and it reactivates the mark." | |
2076c87c | 1461 | (interactive nil) |
af39530e | 1462 | (let ((omark (mark t))) |
2076c87c JB |
1463 | (if (null omark) |
1464 | (error "No mark set in this buffer")) | |
1465 | (set-mark (point)) | |
1466 | (goto-char omark) | |
1467 | nil)) | |
e23c2c21 RS |
1468 | |
1469 | (defun transient-mark-mode (arg) | |
1470 | "Toggle Transient Mark mode. | |
b411b5fa | 1471 | With arg, turn Transient Mark mode on if arg is positive, off otherwise. |
e23c2c21 | 1472 | |
5dd1220d RS |
1473 | In Transient Mark mode, when the mark is active, the region is highlighted. |
1474 | Changing the buffer \"deactivates\" the mark. | |
1475 | So do certain other operations that set the mark | |
1476 | but whose main purpose is something else--for example, | |
1477 | incremental search, \\[beginning-of-buffer], and \\[end-of-buffer]." | |
e23c2c21 RS |
1478 | (interactive "P") |
1479 | (setq transient-mark-mode | |
1480 | (if (null arg) | |
1481 | (not transient-mark-mode) | |
1482 | (> (prefix-numeric-value arg) 0)))) | |
dc029f0b RM |
1483 | |
1484 | (defun pop-global-mark () | |
1485 | "Pop off global mark ring and jump to the top location." | |
1486 | (interactive) | |
52b6d445 RS |
1487 | ;; Pop entries which refer to non-existent buffers. |
1488 | (while (and global-mark-ring (not (marker-buffer (car global-mark-ring)))) | |
1489 | (setq global-mark-ring (cdr global-mark-ring))) | |
dc029f0b RM |
1490 | (or global-mark-ring |
1491 | (error "No global mark set")) | |
1492 | (let* ((marker (car global-mark-ring)) | |
1493 | (buffer (marker-buffer marker)) | |
1494 | (position (marker-position marker))) | |
1495 | (setq global-mark-ring (cdr global-mark-ring)) | |
1496 | (set-buffer buffer) | |
1497 | (or (and (>= position (point-min)) | |
1498 | (<= position (point-max))) | |
1499 | (widen)) | |
1500 | (goto-char position) | |
1501 | (switch-to-buffer buffer))) | |
2076c87c | 1502 | \f |
38ebcf29 | 1503 | (defvar next-line-add-newlines t |
dff7d67f | 1504 | "*If non-nil, `next-line' inserts newline to avoid `end of buffer' error.") |
38ebcf29 | 1505 | |
2076c87c JB |
1506 | (defun next-line (arg) |
1507 | "Move cursor vertically down ARG lines. | |
1508 | If there is no character in the target line exactly under the current column, | |
1509 | the cursor is positioned after the character in that line which spans this | |
1510 | column, or at the end of the line if it is not long enough. | |
38ebcf29 ER |
1511 | If there is no line in the buffer after this one, behavior depends on the |
1512 | value of next-line-add-newlines. If non-nil, a newline character is inserted | |
1513 | to create a line and the cursor moves to that line, otherwise the cursor is | |
1514 | moved to the end of the buffer (if already at the end of the buffer, an error | |
1515 | is signaled). | |
2076c87c JB |
1516 | |
1517 | The command \\[set-goal-column] can be used to create | |
1518 | a semipermanent goal column to which this command always moves. | |
1519 | Then it does not try to move vertically. This goal column is stored | |
1520 | in `goal-column', which is nil when there is none. | |
1521 | ||
1522 | If you are thinking of using this in a Lisp program, consider | |
1523 | using `forward-line' instead. It is usually easier to use | |
1524 | and more reliable (no dependence on goal column, etc.)." | |
1525 | (interactive "p") | |
028922cf RS |
1526 | (if (and next-line-add-newlines (= arg 1)) |
1527 | (let ((opoint (point))) | |
3534a809 RS |
1528 | (end-of-line) |
1529 | (if (eobp) | |
028922cf RS |
1530 | (insert ?\n) |
1531 | (goto-char opoint) | |
1532 | (line-move arg))) | |
1533 | (line-move arg)) | |
2076c87c JB |
1534 | nil) |
1535 | ||
1536 | (defun previous-line (arg) | |
1537 | "Move cursor vertically up ARG lines. | |
1538 | If there is no character in the target line exactly over the current column, | |
1539 | the cursor is positioned after the character in that line which spans this | |
1540 | column, or at the end of the line if it is not long enough. | |
1541 | ||
1542 | The command \\[set-goal-column] can be used to create | |
1543 | a semipermanent goal column to which this command always moves. | |
1544 | Then it does not try to move vertically. | |
1545 | ||
1546 | If you are thinking of using this in a Lisp program, consider using | |
c2e8a012 | 1547 | `forward-line' with a negative argument instead. It is usually easier |
2076c87c JB |
1548 | to use and more reliable (no dependence on goal column, etc.)." |
1549 | (interactive "p") | |
1550 | (line-move (- arg)) | |
1551 | nil) | |
1552 | ||
1553 | (defconst track-eol nil | |
1554 | "*Non-nil means vertical motion starting at end of line keeps to ends of lines. | |
1555 | This means moving to the end of each line moved onto. | |
1556 | The beginning of a blank line does not count as the end of a line.") | |
1557 | ||
912c6728 RS |
1558 | (defvar goal-column nil |
1559 | "*Semipermanent goal column for vertical motion, as set by \\[set-goal-column], or nil.") | |
1560 | (make-variable-buffer-local 'goal-column) | |
2076c87c JB |
1561 | |
1562 | (defvar temporary-goal-column 0 | |
1563 | "Current goal column for vertical motion. | |
1564 | It is the column where point was | |
1565 | at the start of current run of vertical motion commands. | |
c637ae6f | 1566 | When the `track-eol' feature is doing its job, the value is 9999.") |
2076c87c JB |
1567 | |
1568 | (defun line-move (arg) | |
1d8f6c8c RS |
1569 | (if (not (or (eq last-command 'next-line) |
1570 | (eq last-command 'previous-line))) | |
1571 | (setq temporary-goal-column | |
1572 | (if (and track-eol (eolp) | |
1573 | ;; Don't count beg of empty line as end of line | |
1574 | ;; unless we just did explicit end-of-line. | |
1575 | (or (not (bolp)) (eq last-command 'end-of-line))) | |
1576 | 9999 | |
1577 | (current-column)))) | |
1578 | (if (not (integerp selective-display)) | |
3534a809 RS |
1579 | (or (if (> arg 0) |
1580 | (progn (if (> arg 1) (forward-line (1- arg))) | |
1581 | ;; This way of moving forward ARG lines | |
1582 | ;; verifies that we have a newline after the last one. | |
1583 | ;; It doesn't get confused by intangible text. | |
1584 | (end-of-line) | |
1585 | (zerop (forward-line 1))) | |
1586 | (and (zerop (forward-line arg)) | |
1587 | (bolp))) | |
1d8f6c8c RS |
1588 | (signal (if (bobp) |
1589 | 'beginning-of-buffer | |
1590 | 'end-of-buffer) | |
1591 | nil)) | |
1592 | ;; Move by arg lines, but ignore invisible ones. | |
1593 | (while (> arg 0) | |
1594 | (end-of-line) | |
1595 | (and (zerop (vertical-motion 1)) | |
1596 | (signal 'end-of-buffer nil)) | |
1597 | (setq arg (1- arg))) | |
1598 | (while (< arg 0) | |
1599 | (beginning-of-line) | |
1600 | (and (zerop (vertical-motion -1)) | |
1601 | (signal 'beginning-of-buffer nil)) | |
1602 | (setq arg (1+ arg)))) | |
1603 | (move-to-column (or goal-column temporary-goal-column)) | |
1604 | nil) | |
2076c87c | 1605 | |
d5ab2033 JB |
1606 | ;;; Many people have said they rarely use this feature, and often type |
1607 | ;;; it by accident. Maybe it shouldn't even be on a key. | |
1608 | (put 'set-goal-column 'disabled t) | |
2076c87c JB |
1609 | |
1610 | (defun set-goal-column (arg) | |
1611 | "Set the current horizontal position as a goal for \\[next-line] and \\[previous-line]. | |
1612 | Those commands will move to this position in the line moved to | |
1613 | rather than trying to keep the same horizontal position. | |
1614 | With a non-nil argument, clears out the goal column | |
912c6728 RS |
1615 | so that \\[next-line] and \\[previous-line] resume vertical motion. |
1616 | The goal column is stored in the variable `goal-column'." | |
2076c87c JB |
1617 | (interactive "P") |
1618 | (if arg | |
1619 | (progn | |
1620 | (setq goal-column nil) | |
1621 | (message "No goal column")) | |
1622 | (setq goal-column (current-column)) | |
1623 | (message (substitute-command-keys | |
1624 | "Goal column %d (use \\[set-goal-column] with an arg to unset it)") | |
1625 | goal-column)) | |
1626 | nil) | |
1627 | \f | |
0d5bbbf7 ER |
1628 | ;;; Partial support for horizontal autoscrolling. Someday, this feature |
1629 | ;;; will be built into the C level and all the (hscroll-point-visible) calls | |
1630 | ;;; will go away. | |
1631 | ||
1632 | (defvar hscroll-step 0 | |
1633 | "*The number of columns to try scrolling a window by when point moves out. | |
1634 | If that fails to bring point back on frame, point is centered instead. | |
1635 | If this is zero, point is always centered after it moves off frame.") | |
1636 | ||
1637 | (defun hscroll-point-visible () | |
26c5bf8e KH |
1638 | "Scrolls the selected window horizontally to make point visible." |
1639 | (save-excursion | |
1640 | (set-buffer (window-buffer)) | |
1641 | (if (not (or truncate-lines | |
1642 | (> (window-hscroll) 0) | |
1643 | (and truncate-partial-width-windows | |
1644 | (< (window-width) (frame-width))))) | |
1645 | ;; Point is always visible when lines are wrapped. | |
1646 | () | |
1647 | ;; If point is on the invisible part of the line before window-start, | |
1648 | ;; then hscrolling can't bring it back, so reset window-start first. | |
1649 | (and (< (point) (window-start)) | |
1650 | (let ((ws-bol (save-excursion | |
1651 | (goto-char (window-start)) | |
1652 | (beginning-of-line) | |
1653 | (point)))) | |
1654 | (and (>= (point) ws-bol) | |
1655 | (set-window-start nil ws-bol)))) | |
1656 | (let* ((here (hscroll-window-column)) | |
1657 | (left (min (window-hscroll) 1)) | |
1658 | (right (1- (window-width)))) | |
1659 | ;; Allow for the truncation glyph, if we're not exactly at eol. | |
1660 | (if (not (and (= here right) | |
1661 | (= (following-char) ?\n))) | |
1662 | (setq right (1- right))) | |
1663 | (cond | |
1664 | ;; If too far away, just recenter. But don't show too much | |
1665 | ;; white space off the end of the line. | |
1666 | ((or (< here (- left hscroll-step)) | |
1667 | (> here (+ right hscroll-step))) | |
1668 | (let ((eol (save-excursion (end-of-line) (hscroll-window-column)))) | |
1669 | (scroll-left (min (- here (/ (window-width) 2)) | |
1670 | (- eol (window-width) -5))))) | |
1671 | ;; Within range. Scroll by one step (or maybe not at all). | |
1672 | ((< here left) | |
1673 | (scroll-right hscroll-step)) | |
1674 | ((> here right) | |
1675 | (scroll-left hscroll-step))))))) | |
1676 | ||
1677 | ;; This function returns the window's idea of the display column of point, | |
1678 | ;; assuming that the window is already known to be truncated rather than | |
1679 | ;; wrapped, and that we've already handled the case where point is on the | |
1680 | ;; part of the line before window-start. We ignore window-width; if point | |
1681 | ;; is beyond the right margin, we want to know how far. The return value | |
1682 | ;; includes the effects of window-hscroll, window-start, and the prompt | |
1683 | ;; string in the minibuffer. It may be negative due to hscroll. | |
1684 | (defun hscroll-window-column () | |
1685 | (let* ((hscroll (window-hscroll)) | |
1686 | (startpos (save-excursion | |
1687 | (beginning-of-line) | |
1688 | (if (= (point) (save-excursion | |
1689 | (goto-char (window-start)) | |
1690 | (beginning-of-line) | |
1691 | (point))) | |
1692 | (goto-char (window-start))) | |
1693 | (point))) | |
1694 | (hpos (+ (if (and (eq (selected-window) (minibuffer-window)) | |
1695 | (= 1 (window-start)) | |
1696 | (= startpos (point-min))) | |
1697 | (minibuffer-prompt-width) | |
1698 | 0) | |
1699 | (min 0 (- 1 hscroll)))) | |
1700 | val) | |
1701 | (car (cdr (compute-motion startpos (cons hpos 0) | |
1702 | (point) (cons 0 1) | |
1703 | 1000000 (cons hscroll 0) nil))))) | |
1704 | ||
0d5bbbf7 | 1705 | |
dff7d67f RS |
1706 | ;; rms: (1) The definitions of arrow keys should not simply restate |
1707 | ;; what keys they are. The arrow keys should run the ordinary commands. | |
1708 | ;; (2) The arrow keys are just one of many common ways of moving point | |
1709 | ;; within a line. Real horizontal autoscrolling would be a good feature, | |
1710 | ;; but supporting it only for arrow keys is too incomplete to be desirable. | |
1711 | ||
1712 | ;;;;; Make arrow keys do the right thing for improved terminal support | |
1713 | ;;;;; When we implement true horizontal autoscrolling, right-arrow and | |
1714 | ;;;;; left-arrow can lose the (if truncate-lines ...) clause and become | |
1715 | ;;;;; aliases. These functions are bound to the corresponding keyboard | |
1716 | ;;;;; events in loaddefs.el. | |
1717 | ||
1718 | ;;(defun right-arrow (arg) | |
1719 | ;; "Move right one character on the screen (with prefix ARG, that many chars). | |
1720 | ;;Scroll right if needed to keep point horizontally onscreen." | |
1721 | ;; (interactive "P") | |
1722 | ;; (forward-char arg) | |
1723 | ;; (hscroll-point-visible)) | |
1724 | ||
1725 | ;;(defun left-arrow (arg) | |
1726 | ;; "Move left one character on the screen (with prefix ARG, that many chars). | |
1727 | ;;Scroll left if needed to keep point horizontally onscreen." | |
1728 | ;; (interactive "P") | |
1729 | ;; (backward-char arg) | |
1730 | ;; (hscroll-point-visible)) | |
7492f5a6 RS |
1731 | |
1732 | (defun scroll-other-window-down (lines) | |
1733 | "Scroll the \"other window\" down." | |
1734 | (interactive "P") | |
1735 | (scroll-other-window | |
1736 | ;; Just invert the argument's meaning. | |
1737 | ;; We can do that without knowing which window it will be. | |
1738 | (if (eq lines '-) nil | |
1739 | (if (null lines) '- | |
1740 | (- (prefix-numeric-value lines)))))) | |
3aef9604 RS |
1741 | |
1742 | (defun beginning-of-buffer-other-window (arg) | |
1743 | "Move point to the beginning of the buffer in the other window. | |
1744 | Leave mark at previous position. | |
1745 | With arg N, put point N/10 of the way from the true beginning." | |
1746 | (interactive "P") | |
1747 | (let ((orig-window (selected-window)) | |
1748 | (window (other-window-for-scrolling))) | |
1749 | ;; We use unwind-protect rather than save-window-excursion | |
1750 | ;; because the latter would preserve the things we want to change. | |
1751 | (unwind-protect | |
1752 | (progn | |
1753 | (select-window window) | |
1754 | ;; Set point and mark in that window's buffer. | |
1755 | (beginning-of-buffer arg) | |
1756 | ;; Set point accordingly. | |
1757 | (recenter '(t))) | |
1758 | (select-window orig-window)))) | |
1759 | ||
1760 | (defun end-of-buffer-other-window (arg) | |
1761 | "Move point to the end of the buffer in the other window. | |
1762 | Leave mark at previous position. | |
1763 | With arg N, put point N/10 of the way from the true end." | |
1764 | (interactive "P") | |
1765 | ;; See beginning-of-buffer-other-window for comments. | |
1766 | (let ((orig-window (selected-window)) | |
1767 | (window (other-window-for-scrolling))) | |
1768 | (unwind-protect | |
1769 | (progn | |
1770 | (select-window window) | |
4500ff36 | 1771 | (end-of-buffer arg) |
3aef9604 RS |
1772 | (recenter '(t))) |
1773 | (select-window orig-window)))) | |
38ebcf29 | 1774 | \f |
2076c87c JB |
1775 | (defun transpose-chars (arg) |
1776 | "Interchange characters around point, moving forward one character. | |
1777 | With prefix arg ARG, effect is to take character before point | |
1778 | and drag it forward past ARG other characters (backward if ARG negative). | |
1779 | If no argument and at end of line, the previous two chars are exchanged." | |
1780 | (interactive "*P") | |
1781 | (and (null arg) (eolp) (forward-char -1)) | |
1782 | (transpose-subr 'forward-char (prefix-numeric-value arg))) | |
1783 | ||
1784 | (defun transpose-words (arg) | |
1785 | "Interchange words around point, leaving point at end of them. | |
1786 | With prefix arg ARG, effect is to take word before or around point | |
1787 | and drag it forward past ARG other words (backward if ARG negative). | |
1788 | If ARG is zero, the words around or after point and around or after mark | |
1789 | are interchanged." | |
1790 | (interactive "*p") | |
1791 | (transpose-subr 'forward-word arg)) | |
1792 | ||
1793 | (defun transpose-sexps (arg) | |
1794 | "Like \\[transpose-words] but applies to sexps. | |
1795 | Does not work on a sexp that point is in the middle of | |
1796 | if it is a list or string." | |
1797 | (interactive "*p") | |
1798 | (transpose-subr 'forward-sexp arg)) | |
1799 | ||
1800 | (defun transpose-lines (arg) | |
1801 | "Exchange current line and previous line, leaving point after both. | |
1802 | With argument ARG, takes previous line and moves it past ARG lines. | |
1803 | With argument 0, interchanges line point is in with line mark is in." | |
1804 | (interactive "*p") | |
1805 | (transpose-subr (function | |
1806 | (lambda (arg) | |
1807 | (if (= arg 1) | |
1808 | (progn | |
1809 | ;; Move forward over a line, | |
1810 | ;; but create a newline if none exists yet. | |
1811 | (end-of-line) | |
1812 | (if (eobp) | |
1813 | (newline) | |
1814 | (forward-char 1))) | |
1815 | (forward-line arg)))) | |
1816 | arg)) | |
1817 | ||
1818 | (defun transpose-subr (mover arg) | |
1819 | (let (start1 end1 start2 end2) | |
1820 | (if (= arg 0) | |
1821 | (progn | |
1822 | (save-excursion | |
1823 | (funcall mover 1) | |
1824 | (setq end2 (point)) | |
1825 | (funcall mover -1) | |
1826 | (setq start2 (point)) | |
1827 | (goto-char (mark)) | |
1828 | (funcall mover 1) | |
1829 | (setq end1 (point)) | |
1830 | (funcall mover -1) | |
1831 | (setq start1 (point)) | |
1832 | (transpose-subr-1)) | |
1833 | (exchange-point-and-mark))) | |
1834 | (while (> arg 0) | |
1835 | (funcall mover -1) | |
1836 | (setq start1 (point)) | |
1837 | (funcall mover 1) | |
1838 | (setq end1 (point)) | |
1839 | (funcall mover 1) | |
1840 | (setq end2 (point)) | |
1841 | (funcall mover -1) | |
1842 | (setq start2 (point)) | |
1843 | (transpose-subr-1) | |
1844 | (goto-char end2) | |
1845 | (setq arg (1- arg))) | |
1846 | (while (< arg 0) | |
1847 | (funcall mover -1) | |
1848 | (setq start2 (point)) | |
1849 | (funcall mover -1) | |
1850 | (setq start1 (point)) | |
1851 | (funcall mover 1) | |
1852 | (setq end1 (point)) | |
1853 | (funcall mover 1) | |
1854 | (setq end2 (point)) | |
1855 | (transpose-subr-1) | |
1856 | (setq arg (1+ arg))))) | |
1857 | ||
1858 | (defun transpose-subr-1 () | |
1859 | (if (> (min end1 end2) (max start1 start2)) | |
1860 | (error "Don't have two things to transpose")) | |
1861 | (let ((word1 (buffer-substring start1 end1)) | |
1862 | (word2 (buffer-substring start2 end2))) | |
1863 | (delete-region start2 end2) | |
1864 | (goto-char start2) | |
1865 | (insert word1) | |
1866 | (goto-char (if (< start1 start2) start1 | |
1867 | (+ start1 (- (length word1) (length word2))))) | |
1868 | (delete-char (length word1)) | |
1869 | (insert word2))) | |
1870 | \f | |
1871 | (defconst comment-column 32 | |
1872 | "*Column to indent right-margin comments to. | |
8a8fa723 JB |
1873 | Setting this variable automatically makes it local to the current buffer. |
1874 | Each mode establishes a different default value for this variable; you | |
b492f73b | 1875 | can set the value for a particular mode using that mode's hook.") |
2076c87c JB |
1876 | (make-variable-buffer-local 'comment-column) |
1877 | ||
1878 | (defconst comment-start nil | |
1879 | "*String to insert to start a new comment, or nil if no comment syntax defined.") | |
1880 | ||
1881 | (defconst comment-start-skip nil | |
1882 | "*Regexp to match the start of a comment plus everything up to its body. | |
1883 | If there are any \\(...\\) pairs, the comment delimiter text is held to begin | |
1884 | at the place matched by the close of the first pair.") | |
1885 | ||
1886 | (defconst comment-end "" | |
1887 | "*String to insert to end a new comment. | |
1888 | Should be an empty string if comments are terminated by end-of-line.") | |
1889 | ||
ec9a76e3 JB |
1890 | (defconst comment-indent-hook nil |
1891 | "Obsolete variable for function to compute desired indentation for a comment. | |
1892 | This function is called with no args with point at the beginning of | |
1893 | the comment's starting delimiter.") | |
1894 | ||
1895 | (defconst comment-indent-function | |
2076c87c JB |
1896 | '(lambda () comment-column) |
1897 | "Function to compute desired indentation for a comment. | |
1898 | This function is called with no args with point at the beginning of | |
1899 | the comment's starting delimiter.") | |
1900 | ||
1901 | (defun indent-for-comment () | |
1902 | "Indent this line's comment to comment column, or insert an empty comment." | |
1903 | (interactive "*") | |
1904 | (beginning-of-line 1) | |
1905 | (if (null comment-start) | |
1906 | (error "No comment syntax defined") | |
1907 | (let* ((eolpos (save-excursion (end-of-line) (point))) | |
1908 | cpos indent begpos) | |
1909 | (if (re-search-forward comment-start-skip eolpos 'move) | |
1910 | (progn (setq cpos (point-marker)) | |
1911 | ;; Find the start of the comment delimiter. | |
1912 | ;; If there were paren-pairs in comment-start-skip, | |
1913 | ;; position at the end of the first pair. | |
1914 | (if (match-end 1) | |
1915 | (goto-char (match-end 1)) | |
9d0f559a RM |
1916 | ;; If comment-start-skip matched a string with |
1917 | ;; internal whitespace (not final whitespace) then | |
1918 | ;; the delimiter start at the end of that | |
1919 | ;; whitespace. Otherwise, it starts at the | |
1920 | ;; beginning of what was matched. | |
1921 | (skip-syntax-backward " " (match-beginning 0)) | |
1922 | (skip-syntax-backward "^ " (match-beginning 0))))) | |
2076c87c JB |
1923 | (setq begpos (point)) |
1924 | ;; Compute desired indent. | |
1925 | (if (= (current-column) | |
9d0f559a RM |
1926 | (setq indent (if comment-indent-hook |
1927 | (funcall comment-indent-hook) | |
1928 | (funcall comment-indent-function)))) | |
2076c87c JB |
1929 | (goto-char begpos) |
1930 | ;; If that's different from current, change it. | |
1931 | (skip-chars-backward " \t") | |
1932 | (delete-region (point) begpos) | |
1933 | (indent-to indent)) | |
1934 | ;; An existing comment? | |
1935 | (if cpos | |
1936 | (progn (goto-char cpos) | |
1937 | (set-marker cpos nil)) | |
1938 | ;; No, insert one. | |
1939 | (insert comment-start) | |
1940 | (save-excursion | |
1941 | (insert comment-end)))))) | |
1942 | ||
1943 | (defun set-comment-column (arg) | |
1944 | "Set the comment column based on point. | |
1945 | With no arg, set the comment column to the current column. | |
1946 | With just minus as arg, kill any comment on this line. | |
1947 | With any other arg, set comment column to indentation of the previous comment | |
1948 | and then align or create a comment on this line at that column." | |
1949 | (interactive "P") | |
1950 | (if (eq arg '-) | |
1951 | (kill-comment nil) | |
1952 | (if arg | |
1953 | (progn | |
1954 | (save-excursion | |
1955 | (beginning-of-line) | |
1956 | (re-search-backward comment-start-skip) | |
1957 | (beginning-of-line) | |
1958 | (re-search-forward comment-start-skip) | |
1959 | (goto-char (match-beginning 0)) | |
1960 | (setq comment-column (current-column)) | |
1961 | (message "Comment column set to %d" comment-column)) | |
1962 | (indent-for-comment)) | |
1963 | (setq comment-column (current-column)) | |
1964 | (message "Comment column set to %d" comment-column)))) | |
1965 | ||
1966 | (defun kill-comment (arg) | |
1967 | "Kill the comment on this line, if any. | |
1968 | With argument, kill comments on that many lines starting with this one." | |
1969 | ;; this function loses in a lot of situations. it incorrectly recognises | |
1970 | ;; comment delimiters sometimes (ergo, inside a string), doesn't work | |
1971 | ;; with multi-line comments, can kill extra whitespace if comment wasn't | |
1972 | ;; through end-of-line, et cetera. | |
1973 | (interactive "P") | |
1974 | (or comment-start-skip (error "No comment syntax defined")) | |
1975 | (let ((count (prefix-numeric-value arg)) endc) | |
1976 | (while (> count 0) | |
1977 | (save-excursion | |
1978 | (end-of-line) | |
1979 | (setq endc (point)) | |
1980 | (beginning-of-line) | |
1981 | (and (string< "" comment-end) | |
1982 | (setq endc | |
1983 | (progn | |
1984 | (re-search-forward (regexp-quote comment-end) endc 'move) | |
1985 | (skip-chars-forward " \t") | |
1986 | (point)))) | |
1987 | (beginning-of-line) | |
1988 | (if (re-search-forward comment-start-skip endc t) | |
1989 | (progn | |
1990 | (goto-char (match-beginning 0)) | |
1991 | (skip-chars-backward " \t") | |
1992 | (kill-region (point) endc) | |
1993 | ;; to catch comments a line beginnings | |
1994 | (indent-according-to-mode)))) | |
1995 | (if arg (forward-line 1)) | |
1996 | (setq count (1- count))))) | |
1997 | ||
1998 | (defun comment-region (beg end &optional arg) | |
f28039bb RS |
1999 | "Comment or uncomment each line in the region. |
2000 | With just C-u prefix arg, uncomment each line in region. | |
2001 | Numeric prefix arg ARG means use ARG comment characters. | |
2076c87c JB |
2002 | If ARG is negative, delete that many comment characters instead. |
2003 | Comments are terminated on each line, even for syntax in which newline does | |
2004 | not end the comment. Blank lines do not get comments." | |
2005 | ;; if someone wants it to only put a comment-start at the beginning and | |
2006 | ;; comment-end at the end then typing it, C-x C-x, closing it, C-x C-x | |
2007 | ;; is easy enough. No option is made here for other than commenting | |
2008 | ;; every line. | |
f28039bb | 2009 | (interactive "r\nP") |
2076c87c JB |
2010 | (or comment-start (error "No comment syntax is defined")) |
2011 | (if (> beg end) (let (mid) (setq mid beg beg end end mid))) | |
2012 | (save-excursion | |
2013 | (save-restriction | |
f28039bb RS |
2014 | (let ((cs comment-start) (ce comment-end) |
2015 | numarg) | |
2016 | (if (consp arg) (setq numarg t) | |
2017 | (setq numarg (prefix-numeric-value arg)) | |
2018 | ;; For positive arg > 1, replicate the comment delims now, | |
2019 | ;; then insert the replicated strings just once. | |
2020 | (while (> numarg 1) | |
2021 | (setq cs (concat cs comment-start) | |
2022 | ce (concat ce comment-end)) | |
2023 | (setq numarg (1- numarg)))) | |
2024 | ;; Loop over all lines from BEG to END. | |
2076c87c JB |
2025 | (narrow-to-region beg end) |
2026 | (goto-char beg) | |
2027 | (while (not (eobp)) | |
f28039bb RS |
2028 | (if (or (eq numarg t) (< numarg 0)) |
2029 | (progn | |
2030 | ;; Delete comment start from beginning of line. | |
2031 | (if (eq numarg t) | |
2032 | (while (looking-at (regexp-quote cs)) | |
2033 | (delete-char (length cs))) | |
2034 | (let ((count numarg)) | |
2035 | (while (and (> 1 (setq count (1+ count))) | |
2036 | (looking-at (regexp-quote cs))) | |
2037 | (delete-char (length cs))))) | |
2038 | ;; Delete comment end from end of line. | |
2039 | (if (string= "" ce) | |
2040 | nil | |
2041 | (if (eq numarg t) | |
2042 | (progn | |
2043 | (end-of-line) | |
2044 | ;; This is questionable if comment-end ends in | |
2045 | ;; whitespace. That is pretty brain-damaged, | |
2046 | ;; though. | |
2047 | (skip-chars-backward " \t") | |
2048 | (if (and (>= (- (point) (point-min)) (length ce)) | |
2049 | (save-excursion | |
2050 | (backward-char (length ce)) | |
2051 | (looking-at (regexp-quote ce)))) | |
2052 | (delete-char (- (length ce))))) | |
ee095968 RS |
2053 | (let ((count numarg)) |
2054 | (while (> 1 (setq count (1+ count))) | |
2055 | (end-of-line) | |
2056 | ;; this is questionable if comment-end ends in whitespace | |
2057 | ;; that is pretty brain-damaged though | |
2058 | (skip-chars-backward " \t") | |
2059 | (save-excursion | |
2060 | (backward-char (length ce)) | |
2061 | (if (looking-at (regexp-quote ce)) | |
2062 | (delete-char (length ce)))))))) | |
6e88ed49 | 2063 | (forward-line 1)) |
f28039bb | 2064 | ;; Insert at beginning and at end. |
2076c87c JB |
2065 | (if (looking-at "[ \t]*$") () |
2066 | (insert cs) | |
2067 | (if (string= "" ce) () | |
2068 | (end-of-line) | |
2069 | (insert ce))) | |
2070 | (search-forward "\n" nil 'move))))))) | |
2071 | \f | |
2072 | (defun backward-word (arg) | |
2073 | "Move backward until encountering the end of a word. | |
2074 | With argument, do this that many times. | |
ff1fbe3e | 2075 | In programs, it is faster to call `forward-word' with negative arg." |
9e50756b | 2076 | (interactive "p") |
2076c87c JB |
2077 | (forward-word (- arg))) |
2078 | ||
2079 | (defun mark-word (arg) | |
2080 | "Set mark arg words away from point." | |
2081 | (interactive "p") | |
2082 | (push-mark | |
2083 | (save-excursion | |
2084 | (forward-word arg) | |
fd0f4056 RS |
2085 | (point)) |
2086 | nil t)) | |
2076c87c JB |
2087 | |
2088 | (defun kill-word (arg) | |
2089 | "Kill characters forward until encountering the end of a word. | |
2090 | With argument, do this that many times." | |
2091 | (interactive "p") | |
e6291fe1 | 2092 | (kill-region (point) (progn (forward-word arg) (point)))) |
2076c87c JB |
2093 | |
2094 | (defun backward-kill-word (arg) | |
2095 | "Kill characters backward until encountering the end of a word. | |
2096 | With argument, do this that many times." | |
2097 | (interactive "p") | |
2098 | (kill-word (- arg))) | |
d7c64071 | 2099 | |
1e8c5ac4 RS |
2100 | (defun current-word (&optional strict) |
2101 | "Return the word point is on (or a nearby word) as a string. | |
2102 | If optional arg STRICT is non-nil, return nil unless point is within | |
2103 | or adjacent to a word." | |
d7c64071 ER |
2104 | (save-excursion |
2105 | (let ((oldpoint (point)) (start (point)) (end (point))) | |
2106 | (skip-syntax-backward "w_") (setq start (point)) | |
2107 | (goto-char oldpoint) | |
2108 | (skip-syntax-forward "w_") (setq end (point)) | |
2109 | (if (and (eq start oldpoint) (eq end oldpoint)) | |
1e8c5ac4 RS |
2110 | ;; Point is neither within nor adjacent to a word. |
2111 | (and (not strict) | |
2112 | (progn | |
2113 | ;; Look for preceding word in same line. | |
2114 | (skip-syntax-backward "^w_" | |
2115 | (save-excursion (beginning-of-line) | |
2116 | (point))) | |
2117 | (if (bolp) | |
2118 | ;; No preceding word in same line. | |
2119 | ;; Look for following word in same line. | |
2120 | (progn | |
2121 | (skip-syntax-forward "^w_" | |
2122 | (save-excursion (end-of-line) | |
2123 | (point))) | |
2124 | (setq start (point)) | |
2125 | (skip-syntax-forward "w_") | |
2126 | (setq end (point))) | |
2127 | (setq end (point)) | |
2128 | (skip-syntax-backward "w_") | |
2129 | (setq start (point))) | |
2130 | (buffer-substring start end))) | |
2131 | (buffer-substring start end))))) | |
2076c87c JB |
2132 | \f |
2133 | (defconst fill-prefix nil | |
2134 | "*String for filling to insert at front of new line, or nil for none. | |
2135 | Setting this variable automatically makes it local to the current buffer.") | |
2136 | (make-variable-buffer-local 'fill-prefix) | |
2137 | ||
2138 | (defconst auto-fill-inhibit-regexp nil | |
2139 | "*Regexp to match lines which should not be auto-filled.") | |
2140 | ||
2141 | (defun do-auto-fill () | |
2142 | (let (give-up) | |
2143 | (or (and auto-fill-inhibit-regexp | |
2144 | (save-excursion (beginning-of-line) | |
2145 | (looking-at auto-fill-inhibit-regexp))) | |
2146 | (while (and (not give-up) (> (current-column) fill-column)) | |
756811fb | 2147 | ;; Determine where to split the line. |
2076c87c | 2148 | (let ((fill-point |
756811fb RS |
2149 | (let ((opoint (point)) |
2150 | bounce | |
2151 | (first t)) | |
2076c87c JB |
2152 | (save-excursion |
2153 | (move-to-column (1+ fill-column)) | |
756811fb RS |
2154 | ;; Move back to a word boundary. |
2155 | (while (or first | |
2156 | ;; If this is after period and a single space, | |
2157 | ;; move back once more--we don't want to break | |
2158 | ;; the line there and make it look like a | |
2159 | ;; sentence end. | |
2160 | (and (not (bobp)) | |
2161 | (not bounce) | |
2162 | sentence-end-double-space | |
2163 | (save-excursion (forward-char -1) | |
2164 | (and (looking-at "\\. ") | |
2165 | (not (looking-at "\\. ")))))) | |
2166 | (setq first nil) | |
2167 | (skip-chars-backward "^ \t\n") | |
2168 | ;; If we find nowhere on the line to break it, | |
2169 | ;; break after one word. Set bounce to t | |
2170 | ;; so we will not keep going in this while loop. | |
2171 | (if (bolp) | |
2172 | (progn | |
2173 | (re-search-forward "[ \t]" opoint t) | |
2174 | (setq bounce t))) | |
2175 | (skip-chars-backward " \t")) | |
2176 | ;; Let fill-point be set to the place where we end up. | |
2076c87c | 2177 | (point))))) |
756811fb RS |
2178 | ;; If that place is not the beginning of the line, |
2179 | ;; break the line there. | |
2076c87c JB |
2180 | (if (save-excursion |
2181 | (goto-char fill-point) | |
2182 | (not (bolp))) | |
34b45e32 RS |
2183 | (let ((prev-column (current-column))) |
2184 | ;; If point is at the fill-point, do not `save-excursion'. | |
2185 | ;; Otherwise, if a comment prefix or fill-prefix is inserted, | |
2186 | ;; point will end up before it rather than after it. | |
2187 | (if (save-excursion | |
2188 | (skip-chars-backward " \t") | |
2189 | (= (point) fill-point)) | |
2190 | (indent-new-comment-line) | |
2191 | (save-excursion | |
2192 | (goto-char fill-point) | |
2193 | (indent-new-comment-line))) | |
2194 | ;; If making the new line didn't reduce the hpos of | |
2195 | ;; the end of the line, then give up now; | |
2196 | ;; trying again will not help. | |
2197 | (if (>= (current-column) prev-column) | |
2198 | (setq give-up t))) | |
2076c87c JB |
2199 | ;; No place to break => stop trying. |
2200 | (setq give-up t))))))) | |
2201 | ||
d7465b15 RS |
2202 | (defun auto-fill-mode (&optional arg) |
2203 | "Toggle auto-fill mode. | |
2204 | With arg, turn Auto-Fill mode on if and only if arg is positive. | |
2205 | In Auto-Fill mode, inserting a space at a column beyond `fill-column' | |
2206 | automatically breaks the line at a previous space." | |
2207 | (interactive "P") | |
2208 | (prog1 (setq auto-fill-function | |
2209 | (if (if (null arg) | |
2210 | (not auto-fill-function) | |
2211 | (> (prefix-numeric-value arg) 0)) | |
2212 | 'do-auto-fill | |
2213 | nil)) | |
2214 | ;; update mode-line | |
2215 | (set-buffer-modified-p (buffer-modified-p)))) | |
2216 | ||
2217 | ;; This holds a document string used to document auto-fill-mode. | |
2218 | (defun auto-fill-function () | |
2219 | "Automatically break line at a previous space, in insertion of text." | |
2220 | nil) | |
2221 | ||
2222 | (defun turn-on-auto-fill () | |
2223 | "Unconditionally turn on Auto Fill mode." | |
2224 | (auto-fill-mode 1)) | |
2225 | ||
2226 | (defun set-fill-column (arg) | |
2227 | "Set `fill-column' to current column, or to argument if given. | |
2228 | The variable `fill-column' has a separate value for each buffer." | |
2229 | (interactive "P") | |
2230 | (setq fill-column (if (integerp arg) arg (current-column))) | |
2231 | (message "fill-column set to %d" fill-column)) | |
2232 | \f | |
2076c87c JB |
2233 | (defconst comment-multi-line nil |
2234 | "*Non-nil means \\[indent-new-comment-line] should continue same comment | |
c88ab9ce ER |
2235 | on new line, with no new terminator or starter. |
2236 | This is obsolete because you might as well use \\[newline-and-indent].") | |
2076c87c JB |
2237 | |
2238 | (defun indent-new-comment-line () | |
d7465b15 RS |
2239 | "Break line at point and indent, continuing comment if within one. |
2240 | This indents the body of the continued comment | |
2241 | under the previous comment line. | |
c88ab9ce ER |
2242 | |
2243 | This command is intended for styles where you write a comment per line, | |
2244 | starting a new comment (and terminating it if necessary) on each line. | |
2245 | If you want to continue one comment across several lines, use \\[newline-and-indent]." | |
2076c87c JB |
2246 | (interactive "*") |
2247 | (let (comcol comstart) | |
2248 | (skip-chars-backward " \t") | |
2249 | (delete-region (point) | |
2250 | (progn (skip-chars-forward " \t") | |
2251 | (point))) | |
2252 | (insert ?\n) | |
c88ab9ce ER |
2253 | (if (not comment-multi-line) |
2254 | (save-excursion | |
2255 | (if (and comment-start-skip | |
2256 | (let ((opoint (point))) | |
2257 | (forward-line -1) | |
2258 | (re-search-forward comment-start-skip opoint t))) | |
2259 | ;; The old line is a comment. | |
2260 | ;; Set WIN to the pos of the comment-start. | |
2261 | ;; But if the comment is empty, look at preceding lines | |
2262 | ;; to find one that has a nonempty comment. | |
2263 | (let ((win (match-beginning 0))) | |
2264 | (while (and (eolp) (not (bobp)) | |
2265 | (let (opoint) | |
2266 | (beginning-of-line) | |
2267 | (setq opoint (point)) | |
2268 | (forward-line -1) | |
2269 | (re-search-forward comment-start-skip opoint t))) | |
2270 | (setq win (match-beginning 0))) | |
2271 | ;; Indent this line like what we found. | |
2272 | (goto-char win) | |
2273 | (setq comcol (current-column)) | |
2274 | (setq comstart (buffer-substring (point) (match-end 0))))))) | |
2076c87c JB |
2275 | (if comcol |
2276 | (let ((comment-column comcol) | |
2277 | (comment-start comstart) | |
2278 | (comment-end comment-end)) | |
2279 | (and comment-end (not (equal comment-end "")) | |
c88ab9ce | 2280 | ; (if (not comment-multi-line) |
2076c87c JB |
2281 | (progn |
2282 | (forward-char -1) | |
2283 | (insert comment-end) | |
2284 | (forward-char 1)) | |
c88ab9ce ER |
2285 | ; (setq comment-column (+ comment-column (length comment-start)) |
2286 | ; comment-start "") | |
2287 | ; ) | |
2288 | ) | |
2076c87c JB |
2289 | (if (not (eolp)) |
2290 | (setq comment-end "")) | |
2291 | (insert ?\n) | |
2292 | (forward-char -1) | |
2293 | (indent-for-comment) | |
2294 | (save-excursion | |
2295 | ;; Make sure we delete the newline inserted above. | |
2296 | (end-of-line) | |
2297 | (delete-char 1))) | |
2298 | (if fill-prefix | |
2299 | (insert fill-prefix) | |
2300 | (indent-according-to-mode))))) | |
2076c87c JB |
2301 | \f |
2302 | (defun set-selective-display (arg) | |
ff1fbe3e RS |
2303 | "Set `selective-display' to ARG; clear it if no arg. |
2304 | When the value of `selective-display' is a number > 0, | |
2305 | lines whose indentation is >= that value are not displayed. | |
2306 | The variable `selective-display' has a separate value for each buffer." | |
2076c87c JB |
2307 | (interactive "P") |
2308 | (if (eq selective-display t) | |
2309 | (error "selective-display already in use for marked lines")) | |
c88ab9ce ER |
2310 | (let ((current-vpos |
2311 | (save-restriction | |
2312 | (narrow-to-region (point-min) (point)) | |
2313 | (goto-char (window-start)) | |
2314 | (vertical-motion (window-height))))) | |
2315 | (setq selective-display | |
2316 | (and arg (prefix-numeric-value arg))) | |
2317 | (recenter current-vpos)) | |
2076c87c JB |
2318 | (set-window-start (selected-window) (window-start (selected-window))) |
2319 | (princ "selective-display set to " t) | |
2320 | (prin1 selective-display t) | |
2321 | (princ "." t)) | |
2322 | ||
b6a22db0 JB |
2323 | (defconst overwrite-mode-textual " Ovwrt" |
2324 | "The string displayed in the mode line when in overwrite mode.") | |
2325 | (defconst overwrite-mode-binary " Bin Ovwrt" | |
2326 | "The string displayed in the mode line when in binary overwrite mode.") | |
2327 | ||
2076c87c JB |
2328 | (defun overwrite-mode (arg) |
2329 | "Toggle overwrite mode. | |
2330 | With arg, turn overwrite mode on iff arg is positive. | |
2331 | In overwrite mode, printing characters typed in replace existing text | |
b6a22db0 JB |
2332 | on a one-for-one basis, rather than pushing it to the right. At the |
2333 | end of a line, such characters extend the line. Before a tab, | |
2334 | such characters insert until the tab is filled in. | |
2335 | \\[quoted-insert] still inserts characters in overwrite mode; this | |
2336 | is supposed to make it easier to insert characters when necessary." | |
2337 | (interactive "P") | |
2338 | (setq overwrite-mode | |
2339 | (if (if (null arg) (not overwrite-mode) | |
2340 | (> (prefix-numeric-value arg) 0)) | |
2341 | 'overwrite-mode-textual)) | |
2342 | (force-mode-line-update)) | |
2343 | ||
2344 | (defun binary-overwrite-mode (arg) | |
2345 | "Toggle binary overwrite mode. | |
2346 | With arg, turn binary overwrite mode on iff arg is positive. | |
2347 | In binary overwrite mode, printing characters typed in replace | |
2348 | existing text. Newlines are not treated specially, so typing at the | |
2349 | end of a line joins the line to the next, with the typed character | |
2350 | between them. Typing before a tab character simply replaces the tab | |
2351 | with the character typed. | |
2352 | \\[quoted-insert] replaces the text at the cursor, just as ordinary | |
2353 | typing characters do. | |
2354 | ||
2355 | Note that binary overwrite mode is not its own minor mode; it is a | |
2356 | specialization of overwrite-mode, entered by setting the | |
2357 | `overwrite-mode' variable to `overwrite-mode-binary'." | |
2076c87c JB |
2358 | (interactive "P") |
2359 | (setq overwrite-mode | |
b6a22db0 | 2360 | (if (if (null arg) |
a61099dd | 2361 | (not (eq overwrite-mode 'overwrite-mode-binary)) |
b6a22db0 JB |
2362 | (> (prefix-numeric-value arg) 0)) |
2363 | 'overwrite-mode-binary)) | |
2364 | (force-mode-line-update)) | |
2076c87c | 2365 | \f |
a61099dd RS |
2366 | (defvar line-number-mode nil |
2367 | "*Non-nil means display line number in mode line.") | |
2368 | ||
2369 | (defun line-number-mode (arg) | |
2370 | "Toggle Line Number mode. | |
2371 | With arg, turn Line Number mode on iff arg is positive. | |
2372 | When Line Number mode is enabled, the line number appears | |
2373 | in the mode line." | |
2374 | (interactive "P") | |
2375 | (setq line-number-mode | |
2376 | (if (null arg) (not line-number-mode) | |
2377 | (> (prefix-numeric-value arg) 0))) | |
2378 | (force-mode-line-update)) | |
2379 | ||
2076c87c JB |
2380 | (defvar blink-matching-paren t |
2381 | "*Non-nil means show matching open-paren when close-paren is inserted.") | |
2382 | ||
37315725 RS |
2383 | (defconst blink-matching-paren-distance 12000 |
2384 | "*If non-nil, is maximum distance to search for matching open-paren.") | |
2076c87c JB |
2385 | |
2386 | (defun blink-matching-open () | |
2387 | "Move cursor momentarily to the beginning of the sexp before point." | |
2388 | (interactive) | |
2389 | (and (> (point) (1+ (point-min))) | |
4e24c6b1 | 2390 | (not (memq (char-syntax (char-after (- (point) 2))) '(?/ ?\\ ))) |
2076c87c JB |
2391 | blink-matching-paren |
2392 | (let* ((oldpos (point)) | |
2393 | (blinkpos) | |
2394 | (mismatch)) | |
2395 | (save-excursion | |
2396 | (save-restriction | |
2397 | (if blink-matching-paren-distance | |
2398 | (narrow-to-region (max (point-min) | |
2399 | (- (point) blink-matching-paren-distance)) | |
2400 | oldpos)) | |
2401 | (condition-case () | |
2402 | (setq blinkpos (scan-sexps oldpos -1)) | |
2403 | (error nil))) | |
2404 | (and blinkpos (/= (char-syntax (char-after blinkpos)) | |
2405 | ?\$) | |
2406 | (setq mismatch | |
2407 | (/= (char-after (1- oldpos)) | |
7492f5a6 | 2408 | (matching-paren (char-after blinkpos))))) |
2076c87c JB |
2409 | (if mismatch (setq blinkpos nil)) |
2410 | (if blinkpos | |
2411 | (progn | |
2412 | (goto-char blinkpos) | |
2413 | (if (pos-visible-in-window-p) | |
2414 | (sit-for 1) | |
2415 | (goto-char blinkpos) | |
2416 | (message | |
2417 | "Matches %s" | |
e9f1d66d | 2418 | ;; Show what precedes the open in its line, if anything. |
2076c87c JB |
2419 | (if (save-excursion |
2420 | (skip-chars-backward " \t") | |
2421 | (not (bolp))) | |
2422 | (buffer-substring (progn (beginning-of-line) (point)) | |
2423 | (1+ blinkpos)) | |
e9f1d66d RS |
2424 | ;; Show what follows the open in its line, if anything. |
2425 | (if (save-excursion | |
2426 | (forward-char 1) | |
2427 | (skip-chars-forward " \t") | |
2428 | (not (eolp))) | |
2429 | (buffer-substring blinkpos | |
2430 | (progn (end-of-line) (point))) | |
267935b9 RS |
2431 | ;; Otherwise show the previous nonblank line, |
2432 | ;; if there is one. | |
2433 | (if (save-excursion | |
2434 | (skip-chars-backward "\n \t") | |
2435 | (not (bobp))) | |
2436 | (concat | |
2437 | (buffer-substring (progn | |
2438 | (skip-chars-backward "\n \t") | |
2439 | (beginning-of-line) | |
2440 | (point)) | |
2441 | (progn (end-of-line) | |
2442 | (skip-chars-backward " \t") | |
2443 | (point))) | |
2444 | ;; Replace the newline and other whitespace with `...'. | |
2445 | "..." | |
2446 | (buffer-substring blinkpos (1+ blinkpos))) | |
2447 | ;; There is nothing to show except the char itself. | |
2448 | (buffer-substring blinkpos (1+ blinkpos)))))))) | |
2076c87c JB |
2449 | (cond (mismatch |
2450 | (message "Mismatched parentheses")) | |
2451 | ((not blink-matching-paren-distance) | |
2452 | (message "Unmatched parenthesis")))))))) | |
2453 | ||
2454 | ;Turned off because it makes dbx bomb out. | |
2455 | (setq blink-paren-function 'blink-matching-open) | |
2456 | ||
9a1277dd RS |
2457 | ;; This executes C-g typed while Emacs is waiting for a command. |
2458 | ;; Quitting out of a program does not go through here; | |
2459 | ;; that happens in the QUIT macro at the C code level. | |
2076c87c | 2460 | (defun keyboard-quit () |
af39530e RS |
2461 | "Signal a quit condition. |
2462 | During execution of Lisp code, this character causes a quit directly. | |
2463 | At top-level, as an editor command, this simply beeps." | |
2076c87c | 2464 | (interactive) |
19d35374 | 2465 | (deactivate-mark) |
2076c87c JB |
2466 | (signal 'quit nil)) |
2467 | ||
2468 | (define-key global-map "\C-g" 'keyboard-quit) | |
2469 | \f | |
2470 | (defun set-variable (var val) | |
2471 | "Set VARIABLE to VALUE. VALUE is a Lisp object. | |
2472 | When using this interactively, supply a Lisp expression for VALUE. | |
3a801d0c ER |
2473 | If you want VALUE to be a string, you must surround it with doublequotes. |
2474 | ||
2475 | If VARIABLE has a `variable-interactive' property, that is used as if | |
2476 | it were the arg to `interactive' (which see) to interactively read the value." | |
2076c87c JB |
2477 | (interactive |
2478 | (let* ((var (read-variable "Set variable: ")) | |
2479 | (minibuffer-help-form | |
2480 | '(funcall myhelp)) | |
2481 | (myhelp | |
2482 | (function | |
2483 | (lambda () | |
2484 | (with-output-to-temp-buffer "*Help*" | |
2485 | (prin1 var) | |
2486 | (princ "\nDocumentation:\n") | |
2487 | (princ (substring (documentation-property var 'variable-documentation) | |
2488 | 1)) | |
2489 | (if (boundp var) | |
2490 | (let ((print-length 20)) | |
2491 | (princ "\n\nCurrent value: ") | |
2492 | (prin1 (symbol-value var)))) | |
2493 | nil))))) | |
2494 | (list var | |
3a801d0c ER |
2495 | (let ((prop (get var 'variable-interactive))) |
2496 | (if prop | |
2497 | ;; Use VAR's `variable-interactive' property | |
2498 | ;; as an interactive spec for prompting. | |
2499 | (call-interactively (list 'lambda '(arg) | |
2500 | (list 'interactive prop) | |
2501 | 'arg)) | |
2502 | (eval-minibuffer (format "Set %s to value: " var))))))) | |
2076c87c | 2503 | (set var val)) |
e8a700bf RS |
2504 | \f |
2505 | ;; Define the major mode for lists of completions. | |
2506 | ||
ac29eb79 RS |
2507 | (defvar completion-list-mode-map nil) |
2508 | (or completion-list-mode-map | |
e8a700bf RS |
2509 | (let ((map (make-sparse-keymap))) |
2510 | (define-key map [mouse-2] 'mouse-choose-completion) | |
eaf76065 | 2511 | (define-key map [down-mouse-2] nil) |
80298193 RS |
2512 | (define-key map "\C-m" 'choose-completion) |
2513 | (define-key map [return] 'choose-completion) | |
ac29eb79 | 2514 | (setq completion-list-mode-map map))) |
e8a700bf RS |
2515 | |
2516 | ;; Completion mode is suitable only for specially formatted data. | |
ac29eb79 | 2517 | (put 'completion-list-mode 'mode-class 'special) |
e8a700bf | 2518 | |
3819736b RS |
2519 | ;; Record the buffer that was current when the completion list was requested. |
2520 | (defvar completion-reference-buffer) | |
2521 | ||
f6b293e3 RS |
2522 | ;; This records the length of the text at the beginning of the buffer |
2523 | ;; which was not included in the completion. | |
2524 | (defvar completion-base-size nil) | |
2525 | ||
80298193 RS |
2526 | (defun choose-completion () |
2527 | "Choose the completion that point is in or next to." | |
2528 | (interactive) | |
f6b293e3 RS |
2529 | (let (beg end completion (buffer completion-reference-buffer) |
2530 | (base-size completion-base-size)) | |
6096f362 RS |
2531 | (if (and (not (eobp)) (get-text-property (point) 'mouse-face)) |
2532 | (setq end (point) beg (1+ (point)))) | |
2533 | (if (and (not (bobp)) (get-text-property (1- (point)) 'mouse-face)) | |
2534 | (setq end (1- (point)) beg(point))) | |
2535 | (if (null beg) | |
2536 | (error "No completion here")) | |
2537 | (setq beg (previous-single-property-change beg 'mouse-face)) | |
88dd3c24 | 2538 | (setq end (or (next-single-property-change end 'mouse-face) (point-max))) |
ab63960f RS |
2539 | (setq completion (buffer-substring beg end)) |
2540 | (let ((owindow (selected-window))) | |
2541 | (if (and (one-window-p t 'selected-frame) | |
2542 | (window-dedicated-p (selected-window))) | |
2543 | ;; This is a special buffer's frame | |
2544 | (iconify-frame (selected-frame)) | |
2545 | (or (window-dedicated-p (selected-window)) | |
2546 | (bury-buffer))) | |
2547 | (select-window owindow)) | |
f6b293e3 | 2548 | (choose-completion-string completion buffer base-size))) |
80298193 RS |
2549 | |
2550 | ;; Delete the longest partial match for STRING | |
2551 | ;; that can be found before POINT. | |
2552 | (defun choose-completion-delete-max-match (string) | |
2553 | (let ((opoint (point)) | |
2554 | (len (min (length string) | |
2555 | (- (point) (point-min))))) | |
2556 | (goto-char (- (point) (length string))) | |
61bbf6fe RS |
2557 | (if completion-ignore-case |
2558 | (setq string (downcase string))) | |
80298193 RS |
2559 | (while (and (> len 0) |
2560 | (let ((tail (buffer-substring (point) | |
2561 | (+ (point) len)))) | |
61bbf6fe RS |
2562 | (if completion-ignore-case |
2563 | (setq tail (downcase tail))) | |
80298193 RS |
2564 | (not (string= tail (substring string 0 len))))) |
2565 | (setq len (1- len)) | |
2566 | (forward-char 1)) | |
2567 | (delete-char len))) | |
2568 | ||
f6b293e3 | 2569 | (defun choose-completion-string (choice &optional buffer base-size) |
80298193 | 2570 | (let ((buffer (or buffer completion-reference-buffer))) |
cf52ad58 RS |
2571 | ;; If BUFFER is a minibuffer, barf unless it's the currently |
2572 | ;; active minibuffer. | |
2573 | (if (and (string-match "\\` \\*Minibuf-[0-9]+\\*\\'" (buffer-name buffer)) | |
2574 | (or (not (minibuffer-window-active-p (minibuffer-window))) | |
2575 | (not (equal buffer (window-buffer (minibuffer-window)))))) | |
2576 | (error "Minibuffer is not active for completion") | |
2577 | ;; Insert the completion into the buffer where completion was requested. | |
2578 | (set-buffer buffer) | |
f6b293e3 RS |
2579 | (if base-size |
2580 | (delete-region (+ base-size (point-min)) (point)) | |
2581 | (choose-completion-delete-max-match choice)) | |
cf52ad58 | 2582 | (insert choice) |
63240af1 RS |
2583 | (remove-text-properties (- (point) (length choice)) (point) |
2584 | '(mouse-face nil)) | |
cf52ad58 RS |
2585 | ;; Update point in the window that BUFFER is showing in. |
2586 | (let ((window (get-buffer-window buffer t))) | |
2587 | (set-window-point window (point))) | |
2588 | ;; If completing for the minibuffer, exit it with this choice. | |
2589 | (and (equal buffer (window-buffer (minibuffer-window))) | |
8881ad9a RS |
2590 | minibuffer-completion-table |
2591 | (exit-minibuffer))))) | |
80298193 | 2592 | |
ac29eb79 | 2593 | (defun completion-list-mode () |
e8a700bf | 2594 | "Major mode for buffers showing lists of possible completions. |
80298193 RS |
2595 | Type \\<completion-list-mode-map>\\[choose-completion] in the completion list\ |
2596 | to select the completion near point. | |
2597 | Use \\<completion-list-mode-map>\\[mouse-choose-completion] to select one\ | |
2598 | with the mouse." | |
e8a700bf RS |
2599 | (interactive) |
2600 | (kill-all-local-variables) | |
ac29eb79 RS |
2601 | (use-local-map completion-list-mode-map) |
2602 | (setq mode-name "Completion List") | |
2603 | (setq major-mode 'completion-list-mode) | |
f6b293e3 RS |
2604 | (make-local-variable 'completion-base-size) |
2605 | (setq completion-base-size nil) | |
ac29eb79 | 2606 | (run-hooks 'completion-list-mode-hook)) |
e8a700bf | 2607 | |
6096f362 RS |
2608 | (defvar completion-fixup-function nil) |
2609 | ||
e8a700bf RS |
2610 | (defun completion-setup-function () |
2611 | (save-excursion | |
3819736b RS |
2612 | (let ((mainbuf (current-buffer))) |
2613 | (set-buffer standard-output) | |
2614 | (completion-list-mode) | |
2615 | (make-local-variable 'completion-reference-buffer) | |
2616 | (setq completion-reference-buffer mainbuf) | |
2617 | (goto-char (point-min)) | |
2618 | (if window-system | |
2619 | (insert (substitute-command-keys | |
80298193 RS |
2620 | "Click \\[mouse-choose-completion] on a completion to select it.\n"))) |
2621 | (insert (substitute-command-keys | |
2622 | "In this buffer, type \\[choose-completion] to \ | |
c26bb96e KH |
2623 | select the completion near point.\n\n")) |
2624 | (forward-line 1) | |
6096f362 RS |
2625 | (while (re-search-forward "[^ \t\n]+\\( [^ \t\n]+\\)*" nil t) |
2626 | (let ((beg (match-beginning 0)) | |
2627 | (end (point))) | |
2628 | (if completion-fixup-function | |
2629 | (funcall completion-fixup-function)) | |
2630 | (put-text-property beg (point) 'mouse-face 'highlight) | |
2631 | (goto-char end)))))) | |
c88ab9ce | 2632 | |
e8a700bf | 2633 | (add-hook 'completion-setup-hook 'completion-setup-function) |
a3d1480b JB |
2634 | \f |
2635 | ;;;; Keypad support. | |
2636 | ||
2637 | ;;; Make the keypad keys act like ordinary typing keys. If people add | |
2638 | ;;; bindings for the function key symbols, then those bindings will | |
2639 | ;;; override these, so this shouldn't interfere with any existing | |
2640 | ;;; bindings. | |
2641 | ||
0d173134 | 2642 | ;; Also tell read-char how to handle these keys. |
a3d1480b JB |
2643 | (mapcar |
2644 | (lambda (keypad-normal) | |
2645 | (let ((keypad (nth 0 keypad-normal)) | |
2646 | (normal (nth 1 keypad-normal))) | |
0d173134 | 2647 | (put keypad 'ascii-character normal) |
a3d1480b JB |
2648 | (define-key function-key-map (vector keypad) (vector normal)))) |
2649 | '((kp-0 ?0) (kp-1 ?1) (kp-2 ?2) (kp-3 ?3) (kp-4 ?4) | |
2650 | (kp-5 ?5) (kp-6 ?6) (kp-7 ?7) (kp-8 ?8) (kp-9 ?9) | |
2651 | (kp-space ?\ ) | |
2652 | (kp-tab ?\t) | |
2653 | (kp-enter ?\r) | |
2654 | (kp-multiply ?*) | |
2655 | (kp-add ?+) | |
2656 | (kp-separator ?,) | |
2657 | (kp-subtract ?-) | |
2658 | (kp-decimal ?.) | |
2659 | (kp-divide ?/) | |
2660 | (kp-equal ?=))) | |
2661 | ||
c88ab9ce | 2662 | ;;; simple.el ends here |