Commit | Line | Data |
---|---|---|
c88ab9ce | 1 | ;;; subr.el --- basic lisp subroutines for Emacs |
630cc463 | 2 | |
2308acda | 3 | ;; Copyright (C) 1985, 86, 92, 94, 95, 99, 2000, 2001, 2002, 2003 |
fe10cef0 | 4 | ;; Free Software Foundation, Inc. |
be9b65ac | 5 | |
30764597 PJ |
6 | ;; Maintainer: FSF |
7 | ;; Keywords: internal | |
8 | ||
be9b65ac DL |
9 | ;; This file is part of GNU Emacs. |
10 | ||
11 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
12 | ;; it under the terms of the GNU General Public License as published by | |
492878e4 | 13 | ;; the Free Software Foundation; either version 2, or (at your option) |
be9b65ac DL |
14 | ;; any later version. |
15 | ||
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
b578f267 EN |
22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
23 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
24 | ;; Boston, MA 02111-1307, USA. | |
be9b65ac | 25 | |
60370d40 PJ |
26 | ;;; Commentary: |
27 | ||
630cc463 | 28 | ;;; Code: |
77a5664f RS |
29 | (defvar custom-declare-variable-list nil |
30 | "Record `defcustom' calls made before `custom.el' is loaded to handle them. | |
31 | Each element of this list holds the arguments to one call to `defcustom'.") | |
32 | ||
68e3e5f5 | 33 | ;; Use this, rather than defcustom, in subr.el and other files loaded |
77a5664f RS |
34 | ;; before custom.el. |
35 | (defun custom-declare-variable-early (&rest arguments) | |
36 | (setq custom-declare-variable-list | |
37 | (cons arguments custom-declare-variable-list))) | |
2c642c03 GM |
38 | |
39 | \f | |
40 | (defun macro-declaration-function (macro decl) | |
41 | "Process a declaration found in a macro definition. | |
42 | This is set as the value of the variable `macro-declaration-function'. | |
43 | MACRO is the name of the macro being defined. | |
44 | DECL is a list `(declare ...)' containing the declarations. | |
45 | The return value of this function is not used." | |
46 | (dolist (d (cdr decl)) | |
47 | (cond ((and (consp d) (eq (car d) 'indent)) | |
48 | (put macro 'lisp-indent-function (cadr d))) | |
49 | ((and (consp d) (eq (car d) 'debug)) | |
50 | (put macro 'edebug-form-spec (cadr d))) | |
51 | (t | |
52 | (message "Unknown declaration %s" d))))) | |
53 | ||
54 | (setq macro-declaration-function 'macro-declaration-function) | |
55 | ||
9a5336ae JB |
56 | \f |
57 | ;;;; Lisp language features. | |
58 | ||
0764e16f SM |
59 | (defalias 'not 'null) |
60 | ||
9a5336ae JB |
61 | (defmacro lambda (&rest cdr) |
62 | "Return a lambda expression. | |
63 | A call of the form (lambda ARGS DOCSTRING INTERACTIVE BODY) is | |
64 | self-quoting; the result of evaluating the lambda expression is the | |
65 | expression itself. The lambda expression may then be treated as a | |
bec0d7f9 RS |
66 | function, i.e., stored as the function value of a symbol, passed to |
67 | funcall or mapcar, etc. | |
68 | ||
9a5336ae | 69 | ARGS should take the same form as an argument list for a `defun'. |
8fd68088 RS |
70 | DOCSTRING is an optional documentation string. |
71 | If present, it should describe how to call the function. | |
72 | But documentation strings are usually not useful in nameless functions. | |
9a5336ae JB |
73 | INTERACTIVE should be a call to the function `interactive', which see. |
74 | It may also be omitted. | |
374d3fe7 | 75 | BODY should be a list of Lisp expressions." |
9a5336ae JB |
76 | ;; Note that this definition should not use backquotes; subr.el should not |
77 | ;; depend on backquote.el. | |
78 | (list 'function (cons 'lambda cdr))) | |
79 | ||
1be152fc | 80 | (defmacro push (newelt listname) |
fa65505b | 81 | "Add NEWELT to the list stored in the symbol LISTNAME. |
1be152fc | 82 | This is equivalent to (setq LISTNAME (cons NEWELT LISTNAME)). |
d270117a | 83 | LISTNAME must be a symbol." |
22d85d00 DL |
84 | (list 'setq listname |
85 | (list 'cons newelt listname))) | |
d270117a RS |
86 | |
87 | (defmacro pop (listname) | |
88 | "Return the first element of LISTNAME's value, and remove it from the list. | |
89 | LISTNAME must be a symbol whose value is a list. | |
90 | If the value is nil, `pop' returns nil but does not actually | |
91 | change the list." | |
54993fa4 MB |
92 | (list 'car |
93 | (list 'prog1 listname | |
94 | (list 'setq listname (list 'cdr listname))))) | |
d270117a | 95 | |
debff3c3 | 96 | (defmacro when (cond &rest body) |
b021ef18 | 97 | "If COND yields non-nil, do BODY, else return nil." |
debff3c3 | 98 | (list 'if cond (cons 'progn body))) |
9a5336ae | 99 | |
debff3c3 | 100 | (defmacro unless (cond &rest body) |
b021ef18 | 101 | "If COND yields nil, do BODY, else return nil." |
debff3c3 | 102 | (cons 'if (cons cond (cons nil body)))) |
d370591d | 103 | |
a0b0756a RS |
104 | (defmacro dolist (spec &rest body) |
105 | "(dolist (VAR LIST [RESULT]) BODY...): loop over a list. | |
106 | Evaluate BODY with VAR bound to each car from LIST, in turn. | |
107 | Then evaluate RESULT to get return value, default nil." | |
e4295aa1 RS |
108 | (let ((temp (make-symbol "--dolist-temp--"))) |
109 | (list 'let (list (list temp (nth 1 spec)) (car spec)) | |
110 | (list 'while temp | |
111 | (list 'setq (car spec) (list 'car temp)) | |
112 | (cons 'progn | |
113 | (append body | |
114 | (list (list 'setq temp (list 'cdr temp)))))) | |
115 | (if (cdr (cdr spec)) | |
116 | (cons 'progn | |
117 | (cons (list 'setq (car spec) nil) (cdr (cdr spec)))))))) | |
a0b0756a RS |
118 | |
119 | (defmacro dotimes (spec &rest body) | |
120 | "(dotimes (VAR COUNT [RESULT]) BODY...): loop a certain number of times. | |
121 | Evaluate BODY with VAR bound to successive integers running from 0, | |
122 | inclusive, to COUNT, exclusive. Then evaluate RESULT to get | |
123 | the return value (nil if RESULT is omitted)." | |
e4295aa1 RS |
124 | (let ((temp (make-symbol "--dotimes-temp--"))) |
125 | (list 'let (list (list temp (nth 1 spec)) (list (car spec) 0)) | |
126 | (list 'while (list '< (car spec) temp) | |
127 | (cons 'progn | |
128 | (append body (list (list 'setq (car spec) | |
129 | (list '1+ (car spec))))))) | |
130 | (if (cdr (cdr spec)) | |
131 | (car (cdr (cdr spec))) | |
132 | nil)))) | |
a0b0756a | 133 | |
d370591d RS |
134 | (defsubst caar (x) |
135 | "Return the car of the car of X." | |
136 | (car (car x))) | |
137 | ||
138 | (defsubst cadr (x) | |
139 | "Return the car of the cdr of X." | |
140 | (car (cdr x))) | |
141 | ||
142 | (defsubst cdar (x) | |
143 | "Return the cdr of the car of X." | |
144 | (cdr (car x))) | |
145 | ||
146 | (defsubst cddr (x) | |
147 | "Return the cdr of the cdr of X." | |
148 | (cdr (cdr x))) | |
e8c32c99 | 149 | |
369fba5f RS |
150 | (defun last (x &optional n) |
151 | "Return the last link of the list X. Its car is the last element. | |
152 | If X is nil, return nil. | |
153 | If N is non-nil, return the Nth-to-last link of X. | |
154 | If N is bigger than the length of X, return X." | |
155 | (if n | |
156 | (let ((m 0) (p x)) | |
157 | (while (consp p) | |
158 | (setq m (1+ m) p (cdr p))) | |
159 | (if (<= n 0) p | |
160 | (if (< n m) (nthcdr (- m n) x) x))) | |
6bfdc2e2 | 161 | (while (consp (cdr x)) |
369fba5f RS |
162 | (setq x (cdr x))) |
163 | x)) | |
526d204e | 164 | |
1c1c65de KH |
165 | (defun butlast (x &optional n) |
166 | "Returns a copy of LIST with the last N elements removed." | |
167 | (if (and n (<= n 0)) x | |
168 | (nbutlast (copy-sequence x) n))) | |
169 | ||
170 | (defun nbutlast (x &optional n) | |
171 | "Modifies LIST to remove the last N elements." | |
172 | (let ((m (length x))) | |
173 | (or n (setq n 1)) | |
174 | (and (< n m) | |
175 | (progn | |
176 | (if (> n 0) (setcdr (nthcdr (- (1- m) n) x) nil)) | |
177 | x)))) | |
178 | ||
0ed2c9b6 | 179 | (defun number-sequence (from &optional to inc) |
abd9177a | 180 | "Return a sequence of numbers from FROM to TO (both inclusive) as a list. |
0ed2c9b6 VJL |
181 | INC is the increment used between numbers in the sequence. |
182 | So, the Nth element of the list is (+ FROM (* N INC)) where N counts from | |
183 | zero. | |
184 | If INC is nil, it defaults to 1 (one). | |
abd9177a | 185 | If TO is nil, it defaults to FROM. |
0ed2c9b6 VJL |
186 | If TO is less than FROM, the value is nil. |
187 | Note that FROM, TO and INC can be integer or float." | |
188 | (if (not to) | |
189 | (list from) | |
190 | (or inc (setq inc 1)) | |
191 | (let (seq) | |
192 | (while (<= from to) | |
193 | (setq seq (cons from seq) | |
194 | from (+ from inc))) | |
195 | (nreverse seq)))) | |
abd9177a | 196 | |
13157efc | 197 | (defun remove (elt seq) |
963f49a2 | 198 | "Return a copy of SEQ with all occurrences of ELT removed. |
13157efc GM |
199 | SEQ must be a list, vector, or string. The comparison is done with `equal'." |
200 | (if (nlistp seq) | |
201 | ;; If SEQ isn't a list, there's no need to copy SEQ because | |
202 | ;; `delete' will return a new object. | |
203 | (delete elt seq) | |
204 | (delete elt (copy-sequence seq)))) | |
205 | ||
206 | (defun remq (elt list) | |
264ef586 | 207 | "Return a copy of LIST with all occurrences of ELT removed. |
13157efc GM |
208 | The comparison is done with `eq'." |
209 | (if (memq elt list) | |
210 | (delq elt (copy-sequence list)) | |
211 | list)) | |
212 | ||
a176c9eb CW |
213 | (defun copy-tree (tree &optional vecp) |
214 | "Make a copy of TREE. | |
215 | If TREE is a cons cell, this recursively copies both its car and its cdr. | |
cfebd4db | 216 | Contrast to `copy-sequence', which copies only along the cdrs. With second |
a176c9eb CW |
217 | argument VECP, this copies vectors as well as conses." |
218 | (if (consp tree) | |
cfebd4db RS |
219 | (let (result) |
220 | (while (consp tree) | |
221 | (let ((newcar (car tree))) | |
222 | (if (or (consp (car tree)) (and vecp (vectorp (car tree)))) | |
223 | (setq newcar (copy-tree (car tree) vecp))) | |
224 | (push newcar result)) | |
225 | (setq tree (cdr tree))) | |
68b08950 | 226 | (nconc (nreverse result) tree)) |
a176c9eb CW |
227 | (if (and vecp (vectorp tree)) |
228 | (let ((i (length (setq tree (copy-sequence tree))))) | |
229 | (while (>= (setq i (1- i)) 0) | |
cfebd4db RS |
230 | (aset tree i (copy-tree (aref tree i) vecp))) |
231 | tree) | |
232 | tree))) | |
a176c9eb | 233 | |
8a288450 RS |
234 | (defun assoc-default (key alist &optional test default) |
235 | "Find object KEY in a pseudo-alist ALIST. | |
236 | ALIST is a list of conses or objects. Each element (or the element's car, | |
237 | if it is a cons) is compared with KEY by evaluating (TEST (car elt) KEY). | |
238 | If that is non-nil, the element matches; | |
239 | then `assoc-default' returns the element's cdr, if it is a cons, | |
526d204e | 240 | or DEFAULT if the element is not a cons. |
8a288450 RS |
241 | |
242 | If no element matches, the value is nil. | |
243 | If TEST is omitted or nil, `equal' is used." | |
244 | (let (found (tail alist) value) | |
245 | (while (and tail (not found)) | |
246 | (let ((elt (car tail))) | |
247 | (when (funcall (or test 'equal) (if (consp elt) (car elt) elt) key) | |
248 | (setq found t value (if (consp elt) (cdr elt) default)))) | |
249 | (setq tail (cdr tail))) | |
250 | value)) | |
98aae5f6 KH |
251 | |
252 | (defun assoc-ignore-case (key alist) | |
253 | "Like `assoc', but ignores differences in case and text representation. | |
254 | KEY must be a string. Upper-case and lower-case letters are treated as equal. | |
255 | Unibyte strings are converted to multibyte for comparison." | |
256 | (let (element) | |
257 | (while (and alist (not element)) | |
258 | (if (eq t (compare-strings key 0 nil (car (car alist)) 0 nil t)) | |
259 | (setq element (car alist))) | |
260 | (setq alist (cdr alist))) | |
261 | element)) | |
262 | ||
263 | (defun assoc-ignore-representation (key alist) | |
264 | "Like `assoc', but ignores differences in text representation. | |
264ef586 | 265 | KEY must be a string. |
98aae5f6 KH |
266 | Unibyte strings are converted to multibyte for comparison." |
267 | (let (element) | |
268 | (while (and alist (not element)) | |
269 | (if (eq t (compare-strings key 0 nil (car (car alist)) 0 nil)) | |
270 | (setq element (car alist))) | |
271 | (setq alist (cdr alist))) | |
272 | element)) | |
cbbc3205 GM |
273 | |
274 | (defun member-ignore-case (elt list) | |
275 | "Like `member', but ignores differences in case and text representation. | |
276 | ELT must be a string. Upper-case and lower-case letters are treated as equal. | |
d86a3084 RS |
277 | Unibyte strings are converted to multibyte for comparison. |
278 | Non-strings in LIST are ignored." | |
279 | (while (and list | |
280 | (not (and (stringp (car list)) | |
281 | (eq t (compare-strings elt 0 nil (car list) 0 nil t))))) | |
242c13e8 MB |
282 | (setq list (cdr list))) |
283 | list) | |
cbbc3205 | 284 | |
9a5336ae | 285 | \f |
9a5336ae | 286 | ;;;; Keymap support. |
be9b65ac DL |
287 | |
288 | (defun undefined () | |
289 | (interactive) | |
290 | (ding)) | |
291 | ||
292 | ;Prevent the \{...} documentation construct | |
293 | ;from mentioning keys that run this command. | |
294 | (put 'undefined 'suppress-keymap t) | |
295 | ||
296 | (defun suppress-keymap (map &optional nodigits) | |
297 | "Make MAP override all normally self-inserting keys to be undefined. | |
298 | Normally, as an exception, digits and minus-sign are set to make prefix args, | |
299 | but optional second arg NODIGITS non-nil treats them like other chars." | |
098ba983 | 300 | (define-key map [remap self-insert-command] 'undefined) |
be9b65ac DL |
301 | (or nodigits |
302 | (let (loop) | |
303 | (define-key map "-" 'negative-argument) | |
304 | ;; Make plain numbers do numeric args. | |
305 | (setq loop ?0) | |
306 | (while (<= loop ?9) | |
307 | (define-key map (char-to-string loop) 'digit-argument) | |
308 | (setq loop (1+ loop)))))) | |
309 | ||
be9b65ac DL |
310 | ;Moved to keymap.c |
311 | ;(defun copy-keymap (keymap) | |
264ef586 | 312 | ; "Return a copy of KEYMAP" |
be9b65ac DL |
313 | ; (while (not (keymapp keymap)) |
314 | ; (setq keymap (signal 'wrong-type-argument (list 'keymapp keymap)))) | |
315 | ; (if (vectorp keymap) | |
316 | ; (copy-sequence keymap) | |
317 | ; (copy-alist keymap))) | |
318 | ||
f14dbba7 KH |
319 | (defvar key-substitution-in-progress nil |
320 | "Used internally by substitute-key-definition.") | |
321 | ||
7f2c2edd | 322 | (defun substitute-key-definition (olddef newdef keymap &optional oldmap prefix) |
be9b65ac DL |
323 | "Replace OLDDEF with NEWDEF for any keys in KEYMAP now defined as OLDDEF. |
324 | In other words, OLDDEF is replaced with NEWDEF where ever it appears. | |
4656b314 | 325 | Alternatively, if optional fourth argument OLDMAP is specified, we redefine |
ff77cf40 | 326 | in KEYMAP as NEWDEF those keys which are defined as OLDDEF in OLDMAP." |
739f2672 GM |
327 | ;; Don't document PREFIX in the doc string because we don't want to |
328 | ;; advertise it. It's meant for recursive calls only. Here's its | |
329 | ;; meaning | |
264ef586 | 330 | |
739f2672 GM |
331 | ;; If optional argument PREFIX is specified, it should be a key |
332 | ;; prefix, a string. Redefined bindings will then be bound to the | |
333 | ;; original key, with PREFIX added at the front. | |
7f2c2edd RS |
334 | (or prefix (setq prefix "")) |
335 | (let* ((scan (or oldmap keymap)) | |
336 | (vec1 (vector nil)) | |
f14dbba7 KH |
337 | (prefix1 (vconcat prefix vec1)) |
338 | (key-substitution-in-progress | |
339 | (cons scan key-substitution-in-progress))) | |
7f2c2edd RS |
340 | ;; Scan OLDMAP, finding each char or event-symbol that |
341 | ;; has any definition, and act on it with hack-key. | |
342 | (while (consp scan) | |
343 | (if (consp (car scan)) | |
344 | (let ((char (car (car scan))) | |
345 | (defn (cdr (car scan)))) | |
346 | ;; The inside of this let duplicates exactly | |
347 | ;; the inside of the following let that handles array elements. | |
348 | (aset vec1 0 char) | |
349 | (aset prefix1 (length prefix) char) | |
44d798af | 350 | (let (inner-def skipped) |
7f2c2edd RS |
351 | ;; Skip past menu-prompt. |
352 | (while (stringp (car-safe defn)) | |
44d798af | 353 | (setq skipped (cons (car defn) skipped)) |
7f2c2edd | 354 | (setq defn (cdr defn))) |
e025dddf RS |
355 | ;; Skip past cached key-equivalence data for menu items. |
356 | (and (consp defn) (consp (car defn)) | |
357 | (setq defn (cdr defn))) | |
7f2c2edd | 358 | (setq inner-def defn) |
e025dddf | 359 | ;; Look past a symbol that names a keymap. |
7f2c2edd RS |
360 | (while (and (symbolp inner-def) |
361 | (fboundp inner-def)) | |
362 | (setq inner-def (symbol-function inner-def))) | |
328a37ec RS |
363 | (if (or (eq defn olddef) |
364 | ;; Compare with equal if definition is a key sequence. | |
365 | ;; That is useful for operating on function-key-map. | |
366 | (and (or (stringp defn) (vectorp defn)) | |
367 | (equal defn olddef))) | |
44d798af | 368 | (define-key keymap prefix1 (nconc (nreverse skipped) newdef)) |
f14dbba7 | 369 | (if (and (keymapp defn) |
350b7567 RS |
370 | ;; Avoid recursively scanning |
371 | ;; where KEYMAP does not have a submap. | |
afd9831b RS |
372 | (let ((elt (lookup-key keymap prefix1))) |
373 | (or (null elt) | |
374 | (keymapp elt))) | |
350b7567 | 375 | ;; Avoid recursively rescanning keymap being scanned. |
f14dbba7 KH |
376 | (not (memq inner-def |
377 | key-substitution-in-progress))) | |
e025dddf RS |
378 | ;; If this one isn't being scanned already, |
379 | ;; scan it now. | |
7f2c2edd RS |
380 | (substitute-key-definition olddef newdef keymap |
381 | inner-def | |
382 | prefix1))))) | |
916cc49f | 383 | (if (vectorp (car scan)) |
7f2c2edd RS |
384 | (let* ((array (car scan)) |
385 | (len (length array)) | |
386 | (i 0)) | |
387 | (while (< i len) | |
388 | (let ((char i) (defn (aref array i))) | |
389 | ;; The inside of this let duplicates exactly | |
390 | ;; the inside of the previous let. | |
391 | (aset vec1 0 char) | |
392 | (aset prefix1 (length prefix) char) | |
44d798af | 393 | (let (inner-def skipped) |
7f2c2edd RS |
394 | ;; Skip past menu-prompt. |
395 | (while (stringp (car-safe defn)) | |
44d798af | 396 | (setq skipped (cons (car defn) skipped)) |
7f2c2edd | 397 | (setq defn (cdr defn))) |
e025dddf RS |
398 | (and (consp defn) (consp (car defn)) |
399 | (setq defn (cdr defn))) | |
7f2c2edd RS |
400 | (setq inner-def defn) |
401 | (while (and (symbolp inner-def) | |
402 | (fboundp inner-def)) | |
403 | (setq inner-def (symbol-function inner-def))) | |
328a37ec RS |
404 | (if (or (eq defn olddef) |
405 | (and (or (stringp defn) (vectorp defn)) | |
406 | (equal defn olddef))) | |
44d798af RS |
407 | (define-key keymap prefix1 |
408 | (nconc (nreverse skipped) newdef)) | |
f14dbba7 | 409 | (if (and (keymapp defn) |
afd9831b RS |
410 | (let ((elt (lookup-key keymap prefix1))) |
411 | (or (null elt) | |
412 | (keymapp elt))) | |
f14dbba7 KH |
413 | (not (memq inner-def |
414 | key-substitution-in-progress))) | |
7f2c2edd RS |
415 | (substitute-key-definition olddef newdef keymap |
416 | inner-def | |
417 | prefix1))))) | |
97fd9abf RS |
418 | (setq i (1+ i)))) |
419 | (if (char-table-p (car scan)) | |
420 | (map-char-table | |
421 | (function (lambda (char defn) | |
422 | (let () | |
423 | ;; The inside of this let duplicates exactly | |
424 | ;; the inside of the previous let, | |
425 | ;; except that it uses set-char-table-range | |
426 | ;; instead of define-key. | |
427 | (aset vec1 0 char) | |
428 | (aset prefix1 (length prefix) char) | |
429 | (let (inner-def skipped) | |
430 | ;; Skip past menu-prompt. | |
431 | (while (stringp (car-safe defn)) | |
432 | (setq skipped (cons (car defn) skipped)) | |
433 | (setq defn (cdr defn))) | |
434 | (and (consp defn) (consp (car defn)) | |
435 | (setq defn (cdr defn))) | |
436 | (setq inner-def defn) | |
437 | (while (and (symbolp inner-def) | |
438 | (fboundp inner-def)) | |
439 | (setq inner-def (symbol-function inner-def))) | |
440 | (if (or (eq defn olddef) | |
441 | (and (or (stringp defn) (vectorp defn)) | |
442 | (equal defn olddef))) | |
9a5114ac RS |
443 | (define-key keymap prefix1 |
444 | (nconc (nreverse skipped) newdef)) | |
97fd9abf RS |
445 | (if (and (keymapp defn) |
446 | (let ((elt (lookup-key keymap prefix1))) | |
447 | (or (null elt) | |
448 | (keymapp elt))) | |
449 | (not (memq inner-def | |
450 | key-substitution-in-progress))) | |
451 | (substitute-key-definition olddef newdef keymap | |
452 | inner-def | |
453 | prefix1))))))) | |
454 | (car scan))))) | |
7f2c2edd | 455 | (setq scan (cdr scan))))) |
9a5336ae | 456 | |
4ced66fd | 457 | (defun define-key-after (keymap key definition &optional after) |
4434d61b RS |
458 | "Add binding in KEYMAP for KEY => DEFINITION, right after AFTER's binding. |
459 | This is like `define-key' except that the binding for KEY is placed | |
460 | just after the binding for the event AFTER, instead of at the beginning | |
c34a9d34 RS |
461 | of the map. Note that AFTER must be an event type (like KEY), NOT a command |
462 | \(like DEFINITION). | |
463 | ||
4ced66fd | 464 | If AFTER is t or omitted, the new binding goes at the end of the keymap. |
08b1f8a1 | 465 | AFTER should be a single event type--a symbol or a character, not a sequence. |
c34a9d34 | 466 | |
4ced66fd | 467 | Bindings are always added before any inherited map. |
c34a9d34 | 468 | |
4ced66fd DL |
469 | The order of bindings in a keymap matters when it is used as a menu." |
470 | (unless after (setq after t)) | |
4434d61b RS |
471 | (or (keymapp keymap) |
472 | (signal 'wrong-type-argument (list 'keymapp keymap))) | |
08b1f8a1 GM |
473 | (setq key |
474 | (if (<= (length key) 1) (aref key 0) | |
475 | (setq keymap (lookup-key keymap | |
476 | (apply 'vector | |
477 | (butlast (mapcar 'identity key))))) | |
478 | (aref key (1- (length key))))) | |
479 | (let ((tail keymap) done inserted) | |
4434d61b RS |
480 | (while (and (not done) tail) |
481 | ;; Delete any earlier bindings for the same key. | |
08b1f8a1 | 482 | (if (eq (car-safe (car (cdr tail))) key) |
4434d61b | 483 | (setcdr tail (cdr (cdr tail)))) |
08b1f8a1 GM |
484 | ;; If we hit an included map, go down that one. |
485 | (if (keymapp (car tail)) (setq tail (car tail))) | |
4434d61b RS |
486 | ;; When we reach AFTER's binding, insert the new binding after. |
487 | ;; If we reach an inherited keymap, insert just before that. | |
113d28a8 | 488 | ;; If we reach the end of this keymap, insert at the end. |
c34a9d34 RS |
489 | (if (or (and (eq (car-safe (car tail)) after) |
490 | (not (eq after t))) | |
113d28a8 RS |
491 | (eq (car (cdr tail)) 'keymap) |
492 | (null (cdr tail))) | |
4434d61b | 493 | (progn |
113d28a8 RS |
494 | ;; Stop the scan only if we find a parent keymap. |
495 | ;; Keep going past the inserted element | |
496 | ;; so we can delete any duplications that come later. | |
497 | (if (eq (car (cdr tail)) 'keymap) | |
498 | (setq done t)) | |
499 | ;; Don't insert more than once. | |
500 | (or inserted | |
08b1f8a1 | 501 | (setcdr tail (cons (cons key definition) (cdr tail)))) |
113d28a8 | 502 | (setq inserted t))) |
4434d61b RS |
503 | (setq tail (cdr tail))))) |
504 | ||
51fa3961 | 505 | |
d128fe85 RS |
506 | (defmacro kbd (keys) |
507 | "Convert KEYS to the internal Emacs key representation. | |
508 | KEYS should be a string constant in the format used for | |
509 | saving keyboard macros (see `insert-kbd-macro')." | |
510 | (read-kbd-macro keys)) | |
511 | ||
8bed5e3d RS |
512 | (put 'keyboard-translate-table 'char-table-extra-slots 0) |
513 | ||
9a5336ae JB |
514 | (defun keyboard-translate (from to) |
515 | "Translate character FROM to TO at a low level. | |
516 | This function creates a `keyboard-translate-table' if necessary | |
517 | and then modifies one entry in it." | |
8bed5e3d RS |
518 | (or (char-table-p keyboard-translate-table) |
519 | (setq keyboard-translate-table | |
520 | (make-char-table 'keyboard-translate-table nil))) | |
9a5336ae JB |
521 | (aset keyboard-translate-table from to)) |
522 | ||
523 | \f | |
264ef586 | 524 | ;;;; The global keymap tree. |
9a5336ae JB |
525 | |
526 | ;;; global-map, esc-map, and ctl-x-map have their values set up in | |
527 | ;;; keymap.c; we just give them docstrings here. | |
528 | ||
529 | (defvar global-map nil | |
530 | "Default global keymap mapping Emacs keyboard input into commands. | |
531 | The value is a keymap which is usually (but not necessarily) Emacs's | |
532 | global map.") | |
533 | ||
534 | (defvar esc-map nil | |
535 | "Default keymap for ESC (meta) commands. | |
536 | The normal global definition of the character ESC indirects to this keymap.") | |
537 | ||
538 | (defvar ctl-x-map nil | |
539 | "Default keymap for C-x commands. | |
540 | The normal global definition of the character C-x indirects to this keymap.") | |
541 | ||
542 | (defvar ctl-x-4-map (make-sparse-keymap) | |
03eeb110 | 543 | "Keymap for subcommands of C-x 4.") |
059184dd | 544 | (defalias 'ctl-x-4-prefix ctl-x-4-map) |
9a5336ae JB |
545 | (define-key ctl-x-map "4" 'ctl-x-4-prefix) |
546 | ||
547 | (defvar ctl-x-5-map (make-sparse-keymap) | |
548 | "Keymap for frame commands.") | |
059184dd | 549 | (defalias 'ctl-x-5-prefix ctl-x-5-map) |
9a5336ae JB |
550 | (define-key ctl-x-map "5" 'ctl-x-5-prefix) |
551 | ||
0f03054a | 552 | \f |
9a5336ae JB |
553 | ;;;; Event manipulation functions. |
554 | ||
da16e648 KH |
555 | ;; The call to `read' is to ensure that the value is computed at load time |
556 | ;; and not compiled into the .elc file. The value is negative on most | |
557 | ;; machines, but not on all! | |
558 | (defconst listify-key-sequence-1 (logior 128 (read "?\\M-\\^@"))) | |
114137b8 | 559 | |
cde6d7e3 RS |
560 | (defun listify-key-sequence (key) |
561 | "Convert a key sequence to a list of events." | |
562 | (if (vectorp key) | |
563 | (append key nil) | |
564 | (mapcar (function (lambda (c) | |
565 | (if (> c 127) | |
114137b8 | 566 | (logxor c listify-key-sequence-1) |
cde6d7e3 RS |
567 | c))) |
568 | (append key nil)))) | |
569 | ||
53e5a4e8 RS |
570 | (defsubst eventp (obj) |
571 | "True if the argument is an event object." | |
572 | (or (integerp obj) | |
573 | (and (symbolp obj) | |
574 | (get obj 'event-symbol-elements)) | |
575 | (and (consp obj) | |
576 | (symbolp (car obj)) | |
577 | (get (car obj) 'event-symbol-elements)))) | |
578 | ||
579 | (defun event-modifiers (event) | |
580 | "Returns a list of symbols representing the modifier keys in event EVENT. | |
581 | The elements of the list may include `meta', `control', | |
32295976 RS |
582 | `shift', `hyper', `super', `alt', `click', `double', `triple', `drag', |
583 | and `down'." | |
53e5a4e8 RS |
584 | (let ((type event)) |
585 | (if (listp type) | |
586 | (setq type (car type))) | |
587 | (if (symbolp type) | |
588 | (cdr (get type 'event-symbol-elements)) | |
589 | (let ((list nil)) | |
da16e648 | 590 | (or (zerop (logand type ?\M-\^@)) |
53e5a4e8 | 591 | (setq list (cons 'meta list))) |
da16e648 | 592 | (or (and (zerop (logand type ?\C-\^@)) |
53e5a4e8 RS |
593 | (>= (logand type 127) 32)) |
594 | (setq list (cons 'control list))) | |
da16e648 | 595 | (or (and (zerop (logand type ?\S-\^@)) |
53e5a4e8 RS |
596 | (= (logand type 255) (downcase (logand type 255)))) |
597 | (setq list (cons 'shift list))) | |
da16e648 | 598 | (or (zerop (logand type ?\H-\^@)) |
53e5a4e8 | 599 | (setq list (cons 'hyper list))) |
da16e648 | 600 | (or (zerop (logand type ?\s-\^@)) |
53e5a4e8 | 601 | (setq list (cons 'super list))) |
da16e648 | 602 | (or (zerop (logand type ?\A-\^@)) |
53e5a4e8 RS |
603 | (setq list (cons 'alt list))) |
604 | list)))) | |
605 | ||
d63de416 RS |
606 | (defun event-basic-type (event) |
607 | "Returns the basic type of the given event (all modifiers removed). | |
7a0485b2 | 608 | The value is a printing character (not upper case) or a symbol." |
2b0f4ba5 JB |
609 | (if (consp event) |
610 | (setq event (car event))) | |
d63de416 RS |
611 | (if (symbolp event) |
612 | (car (get event 'event-symbol-elements)) | |
613 | (let ((base (logand event (1- (lsh 1 18))))) | |
614 | (downcase (if (< base 32) (logior base 64) base))))) | |
615 | ||
0f03054a RS |
616 | (defsubst mouse-movement-p (object) |
617 | "Return non-nil if OBJECT is a mouse movement event." | |
618 | (and (consp object) | |
619 | (eq (car object) 'mouse-movement))) | |
620 | ||
621 | (defsubst event-start (event) | |
622 | "Return the starting position of EVENT. | |
623 | If EVENT is a mouse press or a mouse click, this returns the location | |
624 | of the event. | |
625 | If EVENT is a drag, this returns the drag's starting position. | |
626 | The return value is of the form | |
e55c21be | 627 | (WINDOW BUFFER-POSITION (X . Y) TIMESTAMP) |
0f03054a | 628 | The `posn-' functions access elements of such lists." |
5ef6a86d SM |
629 | (if (consp event) (nth 1 event) |
630 | (list (selected-window) (point) '(0 . 0) 0))) | |
0f03054a RS |
631 | |
632 | (defsubst event-end (event) | |
633 | "Return the ending location of EVENT. EVENT should be a click or drag event. | |
634 | If EVENT is a click event, this function is the same as `event-start'. | |
635 | The return value is of the form | |
e55c21be | 636 | (WINDOW BUFFER-POSITION (X . Y) TIMESTAMP) |
0f03054a | 637 | The `posn-' functions access elements of such lists." |
5ef6a86d SM |
638 | (if (consp event) (nth (if (consp (nth 2 event)) 2 1) event) |
639 | (list (selected-window) (point) '(0 . 0) 0))) | |
0f03054a | 640 | |
32295976 RS |
641 | (defsubst event-click-count (event) |
642 | "Return the multi-click count of EVENT, a click or drag event. | |
643 | The return value is a positive integer." | |
5ef6a86d | 644 | (if (and (consp event) (integerp (nth 2 event))) (nth 2 event) 1)) |
32295976 | 645 | |
0f03054a RS |
646 | (defsubst posn-window (position) |
647 | "Return the window in POSITION. | |
648 | POSITION should be a list of the form | |
e55c21be | 649 | (WINDOW BUFFER-POSITION (X . Y) TIMESTAMP) |
0f03054a RS |
650 | as returned by the `event-start' and `event-end' functions." |
651 | (nth 0 position)) | |
652 | ||
653 | (defsubst posn-point (position) | |
654 | "Return the buffer location in POSITION. | |
655 | POSITION should be a list of the form | |
e55c21be | 656 | (WINDOW BUFFER-POSITION (X . Y) TIMESTAMP) |
0f03054a | 657 | as returned by the `event-start' and `event-end' functions." |
15db4e0e JB |
658 | (if (consp (nth 1 position)) |
659 | (car (nth 1 position)) | |
660 | (nth 1 position))) | |
0f03054a | 661 | |
e55c21be RS |
662 | (defsubst posn-x-y (position) |
663 | "Return the x and y coordinates in POSITION. | |
0f03054a | 664 | POSITION should be a list of the form |
e55c21be | 665 | (WINDOW BUFFER-POSITION (X . Y) TIMESTAMP) |
0f03054a RS |
666 | as returned by the `event-start' and `event-end' functions." |
667 | (nth 2 position)) | |
668 | ||
ed627e08 | 669 | (defun posn-col-row (position) |
dbbcac56 | 670 | "Return the column and row in POSITION, measured in characters. |
e55c21be RS |
671 | POSITION should be a list of the form |
672 | (WINDOW BUFFER-POSITION (X . Y) TIMESTAMP) | |
ed627e08 RS |
673 | as returned by the `event-start' and `event-end' functions. |
674 | For a scroll-bar event, the result column is 0, and the row | |
675 | corresponds to the vertical position of the click in the scroll bar." | |
3a24cce0 | 676 | (let* ((pair (nth 2 position)) |
194600a8 | 677 | (window (posn-window position))) |
dbbcac56 KH |
678 | (if (eq (if (consp (nth 1 position)) |
679 | (car (nth 1 position)) | |
680 | (nth 1 position)) | |
ed627e08 RS |
681 | 'vertical-scroll-bar) |
682 | (cons 0 (scroll-bar-scale pair (1- (window-height window)))) | |
dbbcac56 KH |
683 | (if (eq (if (consp (nth 1 position)) |
684 | (car (nth 1 position)) | |
685 | (nth 1 position)) | |
ed627e08 RS |
686 | 'horizontal-scroll-bar) |
687 | (cons (scroll-bar-scale pair (window-width window)) 0) | |
9ba60df9 RS |
688 | (let* ((frame (if (framep window) window (window-frame window))) |
689 | (x (/ (car pair) (frame-char-width frame))) | |
ee24a852 | 690 | (y (/ (cdr pair) (+ (frame-char-height frame) |
194600a8 JPW |
691 | (or (frame-parameter frame 'line-spacing) |
692 | default-line-spacing | |
693 | 0))))) | |
ed627e08 | 694 | (cons x y)))))) |
e55c21be | 695 | |
0f03054a RS |
696 | (defsubst posn-timestamp (position) |
697 | "Return the timestamp of POSITION. | |
698 | POSITION should be a list of the form | |
e55c21be | 699 | (WINDOW BUFFER-POSITION (X . Y) TIMESTAMP) |
f415c00c | 700 | as returned by the `event-start' and `event-end' functions." |
0f03054a | 701 | (nth 3 position)) |
9a5336ae | 702 | |
0f03054a | 703 | \f |
9a5336ae JB |
704 | ;;;; Obsolescent names for functions. |
705 | ||
059184dd ER |
706 | (defalias 'dot 'point) |
707 | (defalias 'dot-marker 'point-marker) | |
708 | (defalias 'dot-min 'point-min) | |
709 | (defalias 'dot-max 'point-max) | |
710 | (defalias 'window-dot 'window-point) | |
711 | (defalias 'set-window-dot 'set-window-point) | |
712 | (defalias 'read-input 'read-string) | |
713 | (defalias 'send-string 'process-send-string) | |
714 | (defalias 'send-region 'process-send-region) | |
715 | (defalias 'show-buffer 'set-window-buffer) | |
716 | (defalias 'buffer-flush-undo 'buffer-disable-undo) | |
717 | (defalias 'eval-current-buffer 'eval-buffer) | |
718 | (defalias 'compiled-function-p 'byte-code-function-p) | |
ae1cc031 | 719 | (defalias 'define-function 'defalias) |
be9b65ac | 720 | |
0cba3a0f | 721 | (defalias 'sref 'aref) |
2598a293 | 722 | (make-obsolete 'sref 'aref "20.4") |
1c12af5c | 723 | (make-obsolete 'char-bytes "now always returns 1." "20.4") |
9af6aa14 | 724 | (make-obsolete 'chars-in-region "use (abs (- BEG END))." "20.3") |
b4591b37 JB |
725 | (make-obsolete 'dot 'point "before 19.15") |
726 | (make-obsolete 'dot-max 'point-max "before 19.15") | |
727 | (make-obsolete 'dot-min 'point-min "before 19.15") | |
728 | (make-obsolete 'dot-marker 'point-marker "before 19.15") | |
729 | (make-obsolete 'buffer-flush-undo 'buffer-disable-undo "before 19.15") | |
730 | (make-obsolete 'baud-rate "use the baud-rate variable instead." "before 19.15") | |
731 | (make-obsolete 'compiled-function-p 'byte-code-function-p "before 19.15") | |
732 | (make-obsolete 'define-function 'defalias "20.1") | |
6bb762b3 | 733 | |
676927b7 PJ |
734 | (defun insert-string (&rest args) |
735 | "Mocklisp-compatibility insert function. | |
736 | Like the function `insert' except that any argument that is a number | |
737 | is converted into a string by expressing it in decimal." | |
738 | (dolist (el args) | |
739 | (insert (if (integerp el) (number-to-string el) el)))) | |
9e028368 SM |
740 | (make-obsolete 'insert-string 'insert "21.4") |
741 | (defun makehash (&optional test) (make-hash-table :test (or test 'eql))) | |
742 | (make-obsolete 'makehash 'make-hash-table "21.4") | |
676927b7 | 743 | |
9a5336ae JB |
744 | ;; Some programs still use this as a function. |
745 | (defun baud-rate () | |
8eb93953 | 746 | "Return the value of the `baud-rate' variable." |
9a5336ae JB |
747 | baud-rate) |
748 | ||
0a5c0893 MB |
749 | (defalias 'focus-frame 'ignore) |
750 | (defalias 'unfocus-frame 'ignore) | |
bd292357 JB |
751 | |
752 | \f | |
753 | ;;;; Obsolescence declarations for variables. | |
754 | ||
755 | (make-obsolete-variable 'directory-sep-char "do not use it." "21.1") | |
756 | (make-obsolete-variable 'mode-line-inverse-video "use the appropriate faces instead." "21.1") | |
757 | (make-obsolete-variable 'unread-command-char | |
758 | "use `unread-command-events' instead. That variable is a list of events to reread, so it now uses nil to mean `no event', instead of -1." | |
759 | "before 19.15") | |
760 | (make-obsolete-variable 'executing-macro 'executing-kbd-macro "before 19.34") | |
761 | (make-obsolete-variable 'post-command-idle-hook | |
762 | "use timers instead, with `run-with-idle-timer'." "before 19.34") | |
763 | (make-obsolete-variable 'post-command-idle-delay | |
764 | "use timers instead, with `run-with-idle-timer'." "before 19.34") | |
765 | ||
9a5336ae JB |
766 | \f |
767 | ;;;; Alternate names for functions - these are not being phased out. | |
768 | ||
059184dd ER |
769 | (defalias 'string= 'string-equal) |
770 | (defalias 'string< 'string-lessp) | |
771 | (defalias 'move-marker 'set-marker) | |
059184dd ER |
772 | (defalias 'rplaca 'setcar) |
773 | (defalias 'rplacd 'setcdr) | |
eb8c3be9 | 774 | (defalias 'beep 'ding) ;preserve lingual purity |
059184dd ER |
775 | (defalias 'indent-to-column 'indent-to) |
776 | (defalias 'backward-delete-char 'delete-backward-char) | |
777 | (defalias 'search-forward-regexp (symbol-function 're-search-forward)) | |
778 | (defalias 'search-backward-regexp (symbol-function 're-search-backward)) | |
779 | (defalias 'int-to-string 'number-to-string) | |
024ae2c6 | 780 | (defalias 'store-match-data 'set-match-data) |
112f332f | 781 | (defalias 'make-variable-frame-localizable 'make-variable-frame-local) |
d6c22d46 | 782 | ;; These are the XEmacs names: |
475fb2fb KH |
783 | (defalias 'point-at-eol 'line-end-position) |
784 | (defalias 'point-at-bol 'line-beginning-position) | |
37f6661a JB |
785 | |
786 | ;;; Should this be an obsolete name? If you decide it should, you get | |
787 | ;;; to go through all the sources and change them. | |
059184dd | 788 | (defalias 'string-to-int 'string-to-number) |
be9b65ac | 789 | \f |
9a5336ae | 790 | ;;;; Hook manipulation functions. |
be9b65ac | 791 | |
0e4d378b RS |
792 | (defun make-local-hook (hook) |
793 | "Make the hook HOOK local to the current buffer. | |
71c78f01 RS |
794 | The return value is HOOK. |
795 | ||
c344cf32 SM |
796 | You never need to call this function now that `add-hook' does it for you |
797 | if its LOCAL argument is non-nil. | |
798 | ||
0e4d378b RS |
799 | When a hook is local, its local and global values |
800 | work in concert: running the hook actually runs all the hook | |
801 | functions listed in *either* the local value *or* the global value | |
802 | of the hook variable. | |
803 | ||
08b1f8a1 | 804 | This function works by making t a member of the buffer-local value, |
7dd1926e RS |
805 | which acts as a flag to run the hook functions in the default value as |
806 | well. This works for all normal hooks, but does not work for most | |
807 | non-normal hooks yet. We will be changing the callers of non-normal | |
808 | hooks so that they can handle localness; this has to be done one by | |
809 | one. | |
810 | ||
811 | This function does nothing if HOOK is already local in the current | |
812 | buffer. | |
0e4d378b RS |
813 | |
814 | Do not use `make-local-variable' to make a hook variable buffer-local." | |
815 | (if (local-variable-p hook) | |
816 | nil | |
817 | (or (boundp hook) (set hook nil)) | |
818 | (make-local-variable hook) | |
71c78f01 RS |
819 | (set hook (list t))) |
820 | hook) | |
8eb93953 | 821 | (make-obsolete 'make-local-hook "not necessary any more." "21.1") |
0e4d378b RS |
822 | |
823 | (defun add-hook (hook function &optional append local) | |
32295976 RS |
824 | "Add to the value of HOOK the function FUNCTION. |
825 | FUNCTION is not added if already present. | |
826 | FUNCTION is added (if necessary) at the beginning of the hook list | |
827 | unless the optional argument APPEND is non-nil, in which case | |
828 | FUNCTION is added at the end. | |
829 | ||
0e4d378b RS |
830 | The optional fourth argument, LOCAL, if non-nil, says to modify |
831 | the hook's buffer-local value rather than its default value. | |
61a3d8c4 RS |
832 | This makes the hook buffer-local if needed, and it makes t a member |
833 | of the buffer-local value. That acts as a flag to run the hook | |
834 | functions in the default value as well as in the local value. | |
0e4d378b | 835 | |
32295976 RS |
836 | HOOK should be a symbol, and FUNCTION may be any valid function. If |
837 | HOOK is void, it is first set to nil. If HOOK's value is a single | |
aa09b5ca | 838 | function, it is changed to a list of functions." |
be9b65ac | 839 | (or (boundp hook) (set hook nil)) |
0e4d378b | 840 | (or (default-boundp hook) (set-default hook nil)) |
08b1f8a1 GM |
841 | (if local (unless (local-variable-if-set-p hook) |
842 | (set (make-local-variable hook) (list t))) | |
8947a5e2 SM |
843 | ;; Detect the case where make-local-variable was used on a hook |
844 | ;; and do what we used to do. | |
845 | (unless (and (consp (symbol-value hook)) (memq t (symbol-value hook))) | |
846 | (setq local t))) | |
847 | (let ((hook-value (if local (symbol-value hook) (default-value hook)))) | |
848 | ;; If the hook value is a single function, turn it into a list. | |
849 | (when (or (not (listp hook-value)) (eq (car hook-value) 'lambda)) | |
2248c40d | 850 | (setq hook-value (list hook-value))) |
8947a5e2 SM |
851 | ;; Do the actual addition if necessary |
852 | (unless (member function hook-value) | |
853 | (setq hook-value | |
854 | (if append | |
855 | (append hook-value (list function)) | |
856 | (cons function hook-value)))) | |
857 | ;; Set the actual variable | |
858 | (if local (set hook hook-value) (set-default hook hook-value)))) | |
0e4d378b RS |
859 | |
860 | (defun remove-hook (hook function &optional local) | |
24980d16 RS |
861 | "Remove from the value of HOOK the function FUNCTION. |
862 | HOOK should be a symbol, and FUNCTION may be any valid function. If | |
863 | FUNCTION isn't the value of HOOK, or, if FUNCTION doesn't appear in the | |
0e4d378b RS |
864 | list of hooks to run in HOOK, then nothing is done. See `add-hook'. |
865 | ||
866 | The optional third argument, LOCAL, if non-nil, says to modify | |
867 | the hook's buffer-local value rather than its default value. | |
08b1f8a1 | 868 | This makes the hook buffer-local if needed." |
8947a5e2 SM |
869 | (or (boundp hook) (set hook nil)) |
870 | (or (default-boundp hook) (set-default hook nil)) | |
08b1f8a1 GM |
871 | (if local (unless (local-variable-if-set-p hook) |
872 | (set (make-local-variable hook) (list t))) | |
8947a5e2 SM |
873 | ;; Detect the case where make-local-variable was used on a hook |
874 | ;; and do what we used to do. | |
875 | (unless (and (consp (symbol-value hook)) (memq t (symbol-value hook))) | |
876 | (setq local t))) | |
877 | (let ((hook-value (if local (symbol-value hook) (default-value hook)))) | |
e4da9c1c SM |
878 | ;; Remove the function, for both the list and the non-list cases. |
879 | (if (or (not (listp hook-value)) (eq (car hook-value) 'lambda)) | |
880 | (if (equal hook-value function) (setq hook-value nil)) | |
881 | (setq hook-value (delete function (copy-sequence hook-value)))) | |
8947a5e2 SM |
882 | ;; If the function is on the global hook, we need to shadow it locally |
883 | ;;(when (and local (member function (default-value hook)) | |
884 | ;; (not (member (cons 'not function) hook-value))) | |
885 | ;; (push (cons 'not function) hook-value)) | |
886 | ;; Set the actual variable | |
1087f3e6 RS |
887 | (if (not local) |
888 | (set-default hook hook-value) | |
889 | (if (equal hook-value '(t)) | |
890 | (kill-local-variable hook) | |
891 | (set hook hook-value))))) | |
6e3af630 | 892 | |
c8bfa689 | 893 | (defun add-to-list (list-var element &optional append) |
8851c1f0 | 894 | "Add to the value of LIST-VAR the element ELEMENT if it isn't there yet. |
9f0b1f09 | 895 | The test for presence of ELEMENT is done with `equal'. |
c8bfa689 MB |
896 | If ELEMENT is added, it is added at the beginning of the list, |
897 | unless the optional argument APPEND is non-nil, in which case | |
898 | ELEMENT is added at the end. | |
508bcbca | 899 | |
daebae3d PJ |
900 | The return value is the new value of LIST-VAR. |
901 | ||
8851c1f0 RS |
902 | If you want to use `add-to-list' on a variable that is not defined |
903 | until a certain package is loaded, you should put the call to `add-to-list' | |
904 | into a hook function that will be run only after loading the package. | |
905 | `eval-after-load' provides one way to do this. In some cases | |
906 | other hooks, such as major mode hooks, can do the job." | |
15171a06 KH |
907 | (if (member element (symbol-value list-var)) |
908 | (symbol-value list-var) | |
c8bfa689 MB |
909 | (set list-var |
910 | (if append | |
911 | (append (symbol-value list-var) (list element)) | |
912 | (cons element (symbol-value list-var)))))) | |
448a0170 MB |
913 | |
914 | \f | |
915 | ;;; Load history | |
916 | ||
a2c4ae01 RS |
917 | ;;; (defvar symbol-file-load-history-loaded nil |
918 | ;;; "Non-nil means we have loaded the file `fns-VERSION.el' in `exec-directory'. | |
919 | ;;; That file records the part of `load-history' for preloaded files, | |
920 | ;;; which is cleared out before dumping to make Emacs smaller.") | |
921 | ||
922 | ;;; (defun load-symbol-file-load-history () | |
923 | ;;; "Load the file `fns-VERSION.el' in `exec-directory' if not already done. | |
924 | ;;; That file records the part of `load-history' for preloaded files, | |
925 | ;;; which is cleared out before dumping to make Emacs smaller." | |
926 | ;;; (unless symbol-file-load-history-loaded | |
927 | ;;; (load (expand-file-name | |
928 | ;;; ;; fns-XX.YY.ZZ.el does not work on DOS filesystem. | |
929 | ;;; (if (eq system-type 'ms-dos) | |
930 | ;;; "fns.el" | |
931 | ;;; (format "fns-%s.el" emacs-version)) | |
932 | ;;; exec-directory) | |
933 | ;;; ;; The file name fns-%s.el already has a .el extension. | |
934 | ;;; nil nil t) | |
935 | ;;; (setq symbol-file-load-history-loaded t))) | |
448a0170 MB |
936 | |
937 | (defun symbol-file (function) | |
938 | "Return the input source from which FUNCTION was loaded. | |
939 | The value is normally a string that was passed to `load': | |
940 | either an absolute file name, or a library name | |
941 | \(with no directory name and no `.el' or `.elc' at the end). | |
942 | It can also be nil, if the definition is not associated with any file." | |
e9f13a95 SM |
943 | (if (and (symbolp function) (fboundp function) |
944 | (eq 'autoload (car-safe (symbol-function function)))) | |
945 | (nth 1 (symbol-function function)) | |
946 | (let ((files load-history) | |
cb21744e | 947 | file) |
e9f13a95 | 948 | (while files |
12320833 | 949 | (if (member function (cdr (car files))) |
e9f13a95 SM |
950 | (setq file (car (car files)) files nil)) |
951 | (setq files (cdr files))) | |
952 | file))) | |
448a0170 | 953 | |
be9b65ac | 954 | \f |
9a5336ae JB |
955 | ;;;; Specifying things to do after certain files are loaded. |
956 | ||
957 | (defun eval-after-load (file form) | |
958 | "Arrange that, if FILE is ever loaded, FORM will be run at that time. | |
959 | This makes or adds to an entry on `after-load-alist'. | |
90914938 | 960 | If FILE is already loaded, evaluate FORM right now. |
12c7071c | 961 | It does nothing if FORM is already on the list for FILE. |
19594307 DL |
962 | FILE must match exactly. Normally FILE is the name of a library, |
963 | with no directory or extension specified, since that is how `load' | |
a2d7836f SM |
964 | is normally called. |
965 | FILE can also be a feature (i.e. a symbol), in which case FORM is | |
966 | evaluated whenever that feature is `provide'd." | |
12c7071c | 967 | (let ((elt (assoc file after-load-alist))) |
a2d7836f SM |
968 | ;; Make sure there is an element for FILE. |
969 | (unless elt (setq elt (list file)) (push elt after-load-alist)) | |
970 | ;; Add FORM to the element if it isn't there. | |
971 | (unless (member form (cdr elt)) | |
972 | (nconc elt (list form)) | |
973 | ;; If the file has been loaded already, run FORM right away. | |
974 | (if (if (symbolp file) | |
975 | (featurep file) | |
976 | ;; Make sure `load-history' contains the files dumped with | |
977 | ;; Emacs for the case that FILE is one of them. | |
e9f13a95 | 978 | ;; (load-symbol-file-load-history) |
a2d7836f SM |
979 | (assoc file load-history)) |
980 | (eval form)))) | |
9a5336ae JB |
981 | form) |
982 | ||
983 | (defun eval-next-after-load (file) | |
984 | "Read the following input sexp, and run it whenever FILE is loaded. | |
985 | This makes or adds to an entry on `after-load-alist'. | |
986 | FILE should be the name of a library, with no directory name." | |
987 | (eval-after-load file (read))) | |
7aaacaff RS |
988 | \f |
989 | ;;; make-network-process wrappers | |
990 | ||
991 | (if (featurep 'make-network-process) | |
992 | (progn | |
993 | ||
994 | (defun open-network-stream (name buffer host service) | |
995 | "Open a TCP connection for a service to a host. | |
996 | Returns a subprocess-object to represent the connection. | |
997 | Input and output work as for subprocesses; `delete-process' closes it. | |
998 | Args are NAME BUFFER HOST SERVICE. | |
999 | NAME is name for process. It is modified if necessary to make it unique. | |
1000 | BUFFER is the buffer (or buffer-name) to associate with the process. | |
1001 | Process output goes at end of that buffer, unless you specify | |
1002 | an output stream or filter function to handle the output. | |
1003 | BUFFER may be also nil, meaning that this process is not associated | |
1004 | with any buffer | |
1005 | Third arg is name of the host to connect to, or its IP address. | |
1006 | Fourth arg SERVICE is name of the service desired, or an integer | |
1007 | specifying a port number to connect to." | |
1008 | (make-network-process :name name :buffer buffer | |
1009 | :host host :service service)) | |
1010 | ||
1011 | (defun open-network-stream-nowait (name buffer host service &optional sentinel filter) | |
1012 | "Initiate connection to a TCP connection for a service to a host. | |
1013 | It returns nil if non-blocking connects are not supported; otherwise, | |
1014 | it returns a subprocess-object to represent the connection. | |
1015 | ||
1016 | This function is similar to `open-network-stream', except that this | |
1017 | function returns before the connection is established. When the | |
1018 | connection is completed, the sentinel function will be called with | |
1019 | second arg matching `open' (if successful) or `failed' (on error). | |
1020 | ||
1021 | Args are NAME BUFFER HOST SERVICE SENTINEL FILTER. | |
1022 | NAME, BUFFER, HOST, and SERVICE are as for `open-network-stream'. | |
1023 | Optional args, SENTINEL and FILTER specifies the sentinel and filter | |
1024 | functions to be used for this network stream." | |
1025 | (if (featurep 'make-network-process '(:nowait t)) | |
1026 | (make-network-process :name name :buffer buffer :nowait t | |
1027 | :host host :service service | |
1028 | :filter filter :sentinel sentinel))) | |
1029 | ||
1030 | (defun open-network-stream-server (name buffer service &optional sentinel filter) | |
1031 | "Create a network server process for a TCP service. | |
1032 | It returns nil if server processes are not supported; otherwise, | |
1033 | it returns a subprocess-object to represent the server. | |
1034 | ||
1035 | When a client connects to the specified service, a new subprocess | |
1036 | is created to handle the new connection, and the sentinel function | |
1037 | is called for the new process. | |
1038 | ||
1039 | Args are NAME BUFFER SERVICE SENTINEL FILTER. | |
1040 | NAME is name for the server process. Client processes are named by | |
1041 | appending the ip-address and port number of the client to NAME. | |
1042 | BUFFER is the buffer (or buffer-name) to associate with the server | |
1043 | process. Client processes will not get a buffer if a process filter | |
1044 | is specified or BUFFER is nil; otherwise, a new buffer is created for | |
1045 | the client process. The name is similar to the process name. | |
1046 | Third arg SERVICE is name of the service desired, or an integer | |
1047 | specifying a port number to connect to. It may also be t to selected | |
1048 | an unused port number for the server. | |
1049 | Optional args, SENTINEL and FILTER specifies the sentinel and filter | |
1050 | functions to be used for the client processes; the server process | |
1051 | does not use these function." | |
1052 | (if (featurep 'make-network-process '(:server t)) | |
1053 | (make-network-process :name name :buffer buffer | |
1054 | :service service :server t :noquery t | |
1055 | :sentinel sentinel :filter filter))) | |
1056 | ||
1057 | )) ;; (featurep 'make-network-process) | |
1058 | ||
1059 | ||
1060 | ;; compatibility | |
1061 | ||
1062 | (defun process-kill-without-query (process &optional flag) | |
1063 | "Say no query needed if PROCESS is running when Emacs is exited. | |
1064 | Optional second argument if non-nil says to require a query. | |
264ef586 | 1065 | Value is t if a query was formerly required. |
7aaacaff RS |
1066 | New code should not use this function; use `process-query-on-exit-flag' |
1067 | or `set-process-query-on-exit-flag' instead." | |
1068 | (let ((old (process-query-on-exit-flag process))) | |
1069 | (set-process-query-on-exit-flag process nil) | |
1070 | old)) | |
9a5336ae | 1071 | |
34368d12 KS |
1072 | ;; process plist management |
1073 | ||
1074 | (defun process-get (process propname) | |
1075 | "Return the value of PROCESS' PROPNAME property. | |
1076 | This is the last value stored with `(process-put PROCESS PROPNAME VALUE)'." | |
1077 | (plist-get (process-plist process) propname)) | |
1078 | ||
1079 | (defun process-put (process propname value) | |
1080 | "Change PROCESS' PROPNAME property to VALUE. | |
1081 | It can be retrieved with `(process-get PROCESS PROPNAME)'." | |
f1180544 | 1082 | (set-process-plist process |
34368d12 KS |
1083 | (plist-put (process-plist process) propname value))) |
1084 | ||
9a5336ae JB |
1085 | \f |
1086 | ;;;; Input and display facilities. | |
1087 | ||
77a5664f | 1088 | (defvar read-quoted-char-radix 8 |
1ba764de | 1089 | "*Radix for \\[quoted-insert] and other uses of `read-quoted-char'. |
77a5664f RS |
1090 | Legitimate radix values are 8, 10 and 16.") |
1091 | ||
1092 | (custom-declare-variable-early | |
264ef586 | 1093 | 'read-quoted-char-radix 8 |
77a5664f | 1094 | "*Radix for \\[quoted-insert] and other uses of `read-quoted-char'. |
1ba764de RS |
1095 | Legitimate radix values are 8, 10 and 16." |
1096 | :type '(choice (const 8) (const 10) (const 16)) | |
1097 | :group 'editing-basics) | |
1098 | ||
9a5336ae | 1099 | (defun read-quoted-char (&optional prompt) |
2444730b RS |
1100 | "Like `read-char', but do not allow quitting. |
1101 | Also, if the first character read is an octal digit, | |
1102 | we read any number of octal digits and return the | |
569b03f2 | 1103 | specified character code. Any nondigit terminates the sequence. |
1ba764de | 1104 | If the terminator is RET, it is discarded; |
2444730b RS |
1105 | any other terminator is used itself as input. |
1106 | ||
569b03f2 RS |
1107 | The optional argument PROMPT specifies a string to use to prompt the user. |
1108 | The variable `read-quoted-char-radix' controls which radix to use | |
1109 | for numeric input." | |
c83256a0 | 1110 | (let ((message-log-max nil) done (first t) (code 0) char translated) |
2444730b RS |
1111 | (while (not done) |
1112 | (let ((inhibit-quit first) | |
42e636f0 KH |
1113 | ;; Don't let C-h get the help message--only help function keys. |
1114 | (help-char nil) | |
1115 | (help-form | |
1116 | "Type the special character you want to use, | |
2444730b | 1117 | or the octal character code. |
1ba764de | 1118 | RET terminates the character code and is discarded; |
2444730b | 1119 | any other non-digit terminates the character code and is then used as input.")) |
3f0161d0 | 1120 | (setq char (read-event (and prompt (format "%s-" prompt)) t)) |
9a5336ae | 1121 | (if inhibit-quit (setq quit-flag nil))) |
3f0161d0 SM |
1122 | ;; Translate TAB key into control-I ASCII character, and so on. |
1123 | ;; Note: `read-char' does it using the `ascii-character' property. | |
1124 | ;; We could try and use read-key-sequence instead, but then C-q ESC | |
1125 | ;; or C-q C-x might not return immediately since ESC or C-x might be | |
1126 | ;; bound to some prefix in function-key-map or key-translation-map. | |
c83256a0 RS |
1127 | (setq translated char) |
1128 | (let ((translation (lookup-key function-key-map (vector char)))) | |
1129 | (if (arrayp translation) | |
1130 | (setq translated (aref translation 0)))) | |
1131 | (cond ((null translated)) | |
1132 | ((not (integerp translated)) | |
1133 | (setq unread-command-events (list char) | |
1ba764de | 1134 | done t)) |
c83256a0 | 1135 | ((/= (logand translated ?\M-\^@) 0) |
bf896a1b | 1136 | ;; Turn a meta-character into a character with the 0200 bit set. |
c83256a0 | 1137 | (setq code (logior (logand translated (lognot ?\M-\^@)) 128) |
bf896a1b | 1138 | done t)) |
c83256a0 RS |
1139 | ((and (<= ?0 translated) (< translated (+ ?0 (min 10 read-quoted-char-radix)))) |
1140 | (setq code (+ (* code read-quoted-char-radix) (- translated ?0))) | |
1141 | (and prompt (setq prompt (message "%s %c" prompt translated)))) | |
1142 | ((and (<= ?a (downcase translated)) | |
1143 | (< (downcase translated) (+ ?a -10 (min 26 read-quoted-char-radix)))) | |
92304bc8 | 1144 | (setq code (+ (* code read-quoted-char-radix) |
c83256a0 RS |
1145 | (+ 10 (- (downcase translated) ?a)))) |
1146 | (and prompt (setq prompt (message "%s %c" prompt translated)))) | |
1147 | ((and (not first) (eq translated ?\C-m)) | |
2444730b RS |
1148 | (setq done t)) |
1149 | ((not first) | |
c83256a0 | 1150 | (setq unread-command-events (list char) |
2444730b | 1151 | done t)) |
c83256a0 | 1152 | (t (setq code translated |
2444730b RS |
1153 | done t))) |
1154 | (setq first nil)) | |
bf896a1b | 1155 | code)) |
9a5336ae | 1156 | |
44071d6b RS |
1157 | (defun read-passwd (prompt &optional confirm default) |
1158 | "Read a password, prompting with PROMPT. Echo `.' for each character typed. | |
e0e4cb7a | 1159 | End with RET, LFD, or ESC. DEL or C-h rubs out. C-u kills line. |
44071d6b RS |
1160 | Optional argument CONFIRM, if non-nil, then read it twice to make sure. |
1161 | Optional DEFAULT is a default password to use instead of empty input." | |
1162 | (if confirm | |
1163 | (let (success) | |
1164 | (while (not success) | |
1165 | (let ((first (read-passwd prompt nil default)) | |
1166 | (second (read-passwd "Confirm password: " nil default))) | |
1167 | (if (equal first second) | |
fe10cef0 GM |
1168 | (progn |
1169 | (and (arrayp second) (fillarray second ?\0)) | |
1170 | (setq success first)) | |
1171 | (and (arrayp first) (fillarray first ?\0)) | |
1172 | (and (arrayp second) (fillarray second ?\0)) | |
44071d6b RS |
1173 | (message "Password not repeated accurately; please start over") |
1174 | (sit-for 1)))) | |
1175 | success) | |
1176 | (let ((pass nil) | |
1177 | (c 0) | |
1178 | (echo-keystrokes 0) | |
1179 | (cursor-in-echo-area t)) | |
1180 | (while (progn (message "%s%s" | |
1181 | prompt | |
1182 | (make-string (length pass) ?.)) | |
42ccb7c8 | 1183 | (setq c (read-char-exclusive nil t)) |
44071d6b | 1184 | (and (/= c ?\r) (/= c ?\n) (/= c ?\e))) |
719349f6 | 1185 | (clear-this-command-keys) |
44071d6b | 1186 | (if (= c ?\C-u) |
fe10cef0 GM |
1187 | (progn |
1188 | (and (arrayp pass) (fillarray pass ?\0)) | |
1189 | (setq pass "")) | |
44071d6b | 1190 | (if (and (/= c ?\b) (/= c ?\177)) |
fe10cef0 GM |
1191 | (let* ((new-char (char-to-string c)) |
1192 | (new-pass (concat pass new-char))) | |
1193 | (and (arrayp pass) (fillarray pass ?\0)) | |
1194 | (fillarray new-char ?\0) | |
1195 | (setq c ?\0) | |
1196 | (setq pass new-pass)) | |
44071d6b | 1197 | (if (> (length pass) 0) |
fe10cef0 GM |
1198 | (let ((new-pass (substring pass 0 -1))) |
1199 | (and (arrayp pass) (fillarray pass ?\0)) | |
1200 | (setq pass new-pass)))))) | |
44071d6b RS |
1201 | (message nil) |
1202 | (or pass default "")))) | |
e0e4cb7a | 1203 | \f |
2493767e RS |
1204 | ;;; Atomic change groups. |
1205 | ||
69cae2d4 RS |
1206 | (defmacro atomic-change-group (&rest body) |
1207 | "Perform BODY as an atomic change group. | |
1208 | This means that if BODY exits abnormally, | |
1209 | all of its changes to the current buffer are undone. | |
b9ab4064 | 1210 | This works regardless of whether undo is enabled in the buffer. |
69cae2d4 RS |
1211 | |
1212 | This mechanism is transparent to ordinary use of undo; | |
1213 | if undo is enabled in the buffer and BODY succeeds, the | |
1214 | user can undo the change normally." | |
1215 | (let ((handle (make-symbol "--change-group-handle--")) | |
1216 | (success (make-symbol "--change-group-success--"))) | |
1217 | `(let ((,handle (prepare-change-group)) | |
1218 | (,success nil)) | |
1219 | (unwind-protect | |
1220 | (progn | |
1221 | ;; This is inside the unwind-protect because | |
1222 | ;; it enables undo if that was disabled; we need | |
1223 | ;; to make sure that it gets disabled again. | |
1224 | (activate-change-group ,handle) | |
1225 | ,@body | |
1226 | (setq ,success t)) | |
1227 | ;; Either of these functions will disable undo | |
1228 | ;; if it was disabled before. | |
1229 | (if ,success | |
1230 | (accept-change-group ,handle) | |
1231 | (cancel-change-group ,handle)))))) | |
1232 | ||
1233 | (defun prepare-change-group (&optional buffer) | |
1234 | "Return a handle for the current buffer's state, for a change group. | |
1235 | If you specify BUFFER, make a handle for BUFFER's state instead. | |
1236 | ||
1237 | Pass the handle to `activate-change-group' afterward to initiate | |
1238 | the actual changes of the change group. | |
1239 | ||
1240 | To finish the change group, call either `accept-change-group' or | |
1241 | `cancel-change-group' passing the same handle as argument. Call | |
1242 | `accept-change-group' to accept the changes in the group as final; | |
1243 | call `cancel-change-group' to undo them all. You should use | |
1244 | `unwind-protect' to make sure the group is always finished. The call | |
1245 | to `activate-change-group' should be inside the `unwind-protect'. | |
1246 | Once you finish the group, don't use the handle again--don't try to | |
1247 | finish the same group twice. For a simple example of correct use, see | |
1248 | the source code of `atomic-change-group'. | |
1249 | ||
1250 | The handle records only the specified buffer. To make a multibuffer | |
1251 | change group, call this function once for each buffer you want to | |
1252 | cover, then use `nconc' to combine the returned values, like this: | |
1253 | ||
1254 | (nconc (prepare-change-group buffer-1) | |
1255 | (prepare-change-group buffer-2)) | |
1256 | ||
1257 | You can then activate that multibuffer change group with a single | |
1258 | call to `activate-change-group' and finish it with a single call | |
1259 | to `accept-change-group' or `cancel-change-group'." | |
1260 | ||
1261 | (list (cons (current-buffer) buffer-undo-list))) | |
1262 | ||
1263 | (defun activate-change-group (handle) | |
1264 | "Activate a change group made with `prepare-change-group' (which see)." | |
1265 | (dolist (elt handle) | |
1266 | (with-current-buffer (car elt) | |
1267 | (if (eq buffer-undo-list t) | |
1268 | (setq buffer-undo-list nil))))) | |
1269 | ||
1270 | (defun accept-change-group (handle) | |
1271 | "Finish a change group made with `prepare-change-group' (which see). | |
1272 | This finishes the change group by accepting its changes as final." | |
1273 | (dolist (elt handle) | |
1274 | (with-current-buffer (car elt) | |
1275 | (if (eq elt t) | |
1276 | (setq buffer-undo-list t))))) | |
1277 | ||
1278 | (defun cancel-change-group (handle) | |
1279 | "Finish a change group made with `prepare-change-group' (which see). | |
1280 | This finishes the change group by reverting all of its changes." | |
1281 | (dolist (elt handle) | |
1282 | (with-current-buffer (car elt) | |
1283 | (setq elt (cdr elt)) | |
264ef586 | 1284 | (let ((old-car |
69cae2d4 RS |
1285 | (if (consp elt) (car elt))) |
1286 | (old-cdr | |
1287 | (if (consp elt) (cdr elt)))) | |
1288 | ;; Temporarily truncate the undo log at ELT. | |
1289 | (when (consp elt) | |
1290 | (setcar elt nil) (setcdr elt nil)) | |
1291 | (unless (eq last-command 'undo) (undo-start)) | |
1292 | ;; Make sure there's no confusion. | |
1293 | (when (and (consp elt) (not (eq elt (last pending-undo-list)))) | |
1294 | (error "Undoing to some unrelated state")) | |
1295 | ;; Undo it all. | |
1296 | (while pending-undo-list (undo-more 1)) | |
1297 | ;; Reset the modified cons cell ELT to its original content. | |
1298 | (when (consp elt) | |
1299 | (setcar elt old-car) | |
1300 | (setcdr elt old-cdr)) | |
1301 | ;; Revert the undo info to what it was when we grabbed the state. | |
1302 | (setq buffer-undo-list elt))))) | |
1303 | \f | |
a9d956be RS |
1304 | ;; For compatibility. |
1305 | (defalias 'redraw-modeline 'force-mode-line-update) | |
1306 | ||
9a5336ae | 1307 | (defun force-mode-line-update (&optional all) |
dc756612 RS |
1308 | "Force the mode line of the current buffer to be redisplayed. |
1309 | With optional non-nil ALL, force redisplay of all mode lines." | |
9a5336ae JB |
1310 | (if all (save-excursion (set-buffer (other-buffer)))) |
1311 | (set-buffer-modified-p (buffer-modified-p))) | |
1312 | ||
aa3b4ded | 1313 | (defun momentary-string-display (string pos &optional exit-char message) |
be9b65ac DL |
1314 | "Momentarily display STRING in the buffer at POS. |
1315 | Display remains until next character is typed. | |
1316 | If the char is EXIT-CHAR (optional third arg, default is SPC) it is swallowed; | |
1317 | otherwise it is then available as input (as a command if nothing else). | |
1318 | Display MESSAGE (optional fourth arg) in the echo area. | |
1319 | If MESSAGE is nil, instructions to type EXIT-CHAR are displayed there." | |
1320 | (or exit-char (setq exit-char ?\ )) | |
c306e0e0 | 1321 | (let ((inhibit-read-only t) |
ca2ec1c5 RS |
1322 | ;; Don't modify the undo list at all. |
1323 | (buffer-undo-list t) | |
be9b65ac DL |
1324 | (modified (buffer-modified-p)) |
1325 | (name buffer-file-name) | |
1326 | insert-end) | |
1327 | (unwind-protect | |
1328 | (progn | |
1329 | (save-excursion | |
1330 | (goto-char pos) | |
1331 | ;; defeat file locking... don't try this at home, kids! | |
1332 | (setq buffer-file-name nil) | |
1333 | (insert-before-markers string) | |
3eec84bf RS |
1334 | (setq insert-end (point)) |
1335 | ;; If the message end is off screen, recenter now. | |
024ae2c6 | 1336 | (if (< (window-end nil t) insert-end) |
3eec84bf RS |
1337 | (recenter (/ (window-height) 2))) |
1338 | ;; If that pushed message start off the screen, | |
1339 | ;; scroll to start it at the top of the screen. | |
1340 | (move-to-window-line 0) | |
1341 | (if (> (point) pos) | |
1342 | (progn | |
1343 | (goto-char pos) | |
1344 | (recenter 0)))) | |
be9b65ac DL |
1345 | (message (or message "Type %s to continue editing.") |
1346 | (single-key-description exit-char)) | |
3547c855 | 1347 | (let ((char (read-event))) |
be9b65ac | 1348 | (or (eq char exit-char) |
dbc4e1c1 | 1349 | (setq unread-command-events (list char))))) |
be9b65ac DL |
1350 | (if insert-end |
1351 | (save-excursion | |
1352 | (delete-region pos insert-end))) | |
1353 | (setq buffer-file-name name) | |
1354 | (set-buffer-modified-p modified)))) | |
1355 | ||
9a5336ae | 1356 | \f |
aa3b4ded SM |
1357 | ;;;; Overlay operations |
1358 | ||
1359 | (defun copy-overlay (o) | |
1360 | "Return a copy of overlay O." | |
1361 | (let ((o1 (make-overlay (overlay-start o) (overlay-end o) | |
1362 | ;; FIXME: there's no easy way to find the | |
1363 | ;; insertion-type of the two markers. | |
1364 | (overlay-buffer o))) | |
1365 | (props (overlay-properties o))) | |
1366 | (while props | |
1367 | (overlay-put o1 (pop props) (pop props))) | |
1368 | o1)) | |
1369 | ||
1370 | (defun remove-overlays (beg end name val) | |
1371 | "Clear BEG and END of overlays whose property NAME has value VAL. | |
1372 | Overlays might be moved and or split." | |
1373 | (if (< end beg) | |
1374 | (setq beg (prog1 end (setq end beg)))) | |
1375 | (save-excursion | |
1376 | (dolist (o (overlays-in beg end)) | |
1377 | (when (eq (overlay-get o name) val) | |
1378 | ;; Either push this overlay outside beg...end | |
1379 | ;; or split it to exclude beg...end | |
1380 | ;; or delete it entirely (if it is contained in beg...end). | |
1381 | (if (< (overlay-start o) beg) | |
1382 | (if (> (overlay-end o) end) | |
1383 | (progn | |
1384 | (move-overlay (copy-overlay o) | |
1385 | (overlay-start o) beg) | |
1386 | (move-overlay o end (overlay-end o))) | |
1387 | (move-overlay o (overlay-start o) beg)) | |
1388 | (if (> (overlay-end o) end) | |
1389 | (move-overlay o end (overlay-end o)) | |
1390 | (delete-overlay o))))))) | |
c5802acf | 1391 | \f |
9a5336ae JB |
1392 | ;;;; Miscellanea. |
1393 | ||
448b61c9 RS |
1394 | ;; A number of major modes set this locally. |
1395 | ;; Give it a global value to avoid compiler warnings. | |
1396 | (defvar font-lock-defaults nil) | |
1397 | ||
4fb17037 RS |
1398 | (defvar suspend-hook nil |
1399 | "Normal hook run by `suspend-emacs', before suspending.") | |
1400 | ||
1401 | (defvar suspend-resume-hook nil | |
1402 | "Normal hook run by `suspend-emacs', after Emacs is continued.") | |
1403 | ||
784bc7cd RS |
1404 | (defvar temp-buffer-show-hook nil |
1405 | "Normal hook run by `with-output-to-temp-buffer' after displaying the buffer. | |
1406 | When the hook runs, the temporary buffer is current, and the window it | |
1407 | was displayed in is selected. This hook is normally set up with a | |
1408 | function to make the buffer read only, and find function names and | |
1409 | variable names in it, provided the major mode is still Help mode.") | |
1410 | ||
1411 | (defvar temp-buffer-setup-hook nil | |
1412 | "Normal hook run by `with-output-to-temp-buffer' at the start. | |
1413 | When the hook runs, the temporary buffer is current. | |
1414 | This hook is normally set up with a function to put the buffer in Help | |
1415 | mode.") | |
1416 | ||
448b61c9 RS |
1417 | ;; Avoid compiler warnings about this variable, |
1418 | ;; which has a special meaning on certain system types. | |
1419 | (defvar buffer-file-type nil | |
1420 | "Non-nil if the visited file is a binary file. | |
1421 | This variable is meaningful on MS-DOG and Windows NT. | |
1422 | On those systems, it is automatically local in every buffer. | |
1423 | On other systems, this variable is normally always nil.") | |
1424 | ||
a860d25f | 1425 | ;; This should probably be written in C (i.e., without using `walk-windows'). |
63503b24 | 1426 | (defun get-buffer-window-list (buffer &optional minibuf frame) |
a860d25f | 1427 | "Return windows currently displaying BUFFER, or nil if none. |
63503b24 | 1428 | See `walk-windows' for the meaning of MINIBUF and FRAME." |
43c5ac8c | 1429 | (let ((buffer (if (bufferp buffer) buffer (get-buffer buffer))) windows) |
a860d25f SM |
1430 | (walk-windows (function (lambda (window) |
1431 | (if (eq (window-buffer window) buffer) | |
1432 | (setq windows (cons window windows))))) | |
63503b24 | 1433 | minibuf frame) |
a860d25f SM |
1434 | windows)) |
1435 | ||
f9269e19 RS |
1436 | (defun ignore (&rest ignore) |
1437 | "Do nothing and return nil. | |
1438 | This function accepts any number of arguments, but ignores them." | |
c0f1a4f6 | 1439 | (interactive) |
9a5336ae JB |
1440 | nil) |
1441 | ||
1442 | (defun error (&rest args) | |
aa308ce2 RS |
1443 | "Signal an error, making error message by passing all args to `format'. |
1444 | In Emacs, the convention is that error messages start with a capital | |
1445 | letter but *do not* end with a period. Please follow this convention | |
1446 | for the sake of consistency." | |
9a5336ae JB |
1447 | (while t |
1448 | (signal 'error (list (apply 'format args))))) | |
1449 | ||
cef7ae6e | 1450 | (defalias 'user-original-login-name 'user-login-name) |
9a5336ae | 1451 | |
2493767e RS |
1452 | (defvar yank-excluded-properties) |
1453 | ||
8ed59ad5 KS |
1454 | (defun remove-yank-excluded-properties (start end) |
1455 | "Remove `yank-excluded-properties' between START and END positions. | |
1456 | Replaces `category' properties with their defined properties." | |
1457 | (let ((inhibit-read-only t)) | |
1458 | ;; Replace any `category' property with the properties it stands for. | |
1459 | (unless (memq yank-excluded-properties '(t nil)) | |
1460 | (save-excursion | |
1461 | (goto-char start) | |
1462 | (while (< (point) end) | |
1463 | (let ((cat (get-text-property (point) 'category)) | |
1464 | run-end) | |
8ed59ad5 KS |
1465 | (setq run-end |
1466 | (next-single-property-change (point) 'category nil end)) | |
ebaa3349 RS |
1467 | (when cat |
1468 | (let (run-end2 original) | |
1469 | (remove-list-of-text-properties (point) run-end '(category)) | |
1470 | (while (< (point) run-end) | |
1471 | (setq run-end2 (next-property-change (point) nil run-end)) | |
1472 | (setq original (text-properties-at (point))) | |
1473 | (set-text-properties (point) run-end2 (symbol-plist cat)) | |
1474 | (add-text-properties (point) run-end2 original) | |
1475 | (goto-char run-end2)))) | |
1476 | (goto-char run-end))))) | |
8ed59ad5 KS |
1477 | (if (eq yank-excluded-properties t) |
1478 | (set-text-properties start end nil) | |
ebaa3349 | 1479 | (remove-list-of-text-properties start end yank-excluded-properties)))) |
8ed59ad5 | 1480 | |
e0e80ec9 KS |
1481 | (defvar yank-undo-function) |
1482 | ||
1483 | (defun insert-for-yank (string) | |
1484 | "Insert STRING at point, stripping some text properties. | |
1485 | Strip text properties from the inserted text according to | |
1486 | `yank-excluded-properties'. Otherwise just like (insert STRING). | |
1487 | ||
374d3fe7 | 1488 | If STRING has a non-nil `yank-handler' property on the first character, |
e0e80ec9 KS |
1489 | the normal insert behaviour is modified in various ways. The value of |
1490 | the yank-handler property must be a list with one to five elements | |
9dd10e25 | 1491 | with the following format: (FUNCTION PARAM NOEXCLUDE UNDO). |
e0e80ec9 KS |
1492 | When FUNCTION is present and non-nil, it is called instead of `insert' |
1493 | to insert the string. FUNCTION takes one argument--the object to insert. | |
1494 | If PARAM is present and non-nil, it replaces STRING as the object | |
1495 | passed to FUNCTION (or `insert'); for example, if FUNCTION is | |
1496 | `yank-rectangle', PARAM may be a list of strings to insert as a | |
1497 | rectangle. | |
1498 | If NOEXCLUDE is present and non-nil, the normal removal of the | |
1499 | yank-excluded-properties is not performed; instead FUNCTION is | |
1500 | responsible for removing those properties. This may be necessary | |
1501 | if FUNCTION adjusts point before or after inserting the object. | |
1502 | If UNDO is present and non-nil, it is a function that will be called | |
1503 | by `yank-pop' to undo the insertion of the current object. It is | |
f1180544 | 1504 | called with two arguments, the start and end of the current region. |
9dd10e25 | 1505 | FUNCTION may set `yank-undo-function' to override the UNDO value." |
57596fb6 KS |
1506 | (let* ((handler (and (stringp string) |
1507 | (get-text-property 0 'yank-handler string))) | |
1508 | (param (or (nth 1 handler) string)) | |
e0e80ec9 | 1509 | (opoint (point))) |
57596fb6 KS |
1510 | (setq yank-undo-function t) |
1511 | (if (nth 0 handler) ;; FUNCTION | |
1512 | (funcall (car handler) param) | |
e0e80ec9 | 1513 | (insert param)) |
57596fb6 | 1514 | (unless (nth 2 handler) ;; NOEXCLUDE |
e0e80ec9 | 1515 | (remove-yank-excluded-properties opoint (point))) |
57596fb6 KS |
1516 | (if (eq yank-undo-function t) ;; not set by FUNCTION |
1517 | (setq yank-undo-function (nth 3 handler))) ;; UNDO | |
1518 | (if (nth 4 handler) ;; COMMAND | |
1519 | (setq this-command (nth 4 handler))))) | |
f1180544 | 1520 | |
3b8690f6 KS |
1521 | (defun insert-buffer-substring-no-properties (buf &optional start end) |
1522 | "Insert before point a substring of buffer BUFFER, without text properties. | |
1523 | BUFFER may be a buffer or a buffer name. | |
1524 | Arguments START and END are character numbers specifying the substring. | |
1525 | They default to the beginning and the end of BUFFER." | |
1526 | (let ((opoint (point))) | |
1527 | (insert-buffer-substring buf start end) | |
1528 | (let ((inhibit-read-only t)) | |
1529 | (set-text-properties opoint (point) nil)))) | |
1530 | ||
1531 | (defun insert-buffer-substring-as-yank (buf &optional start end) | |
1532 | "Insert before point a part of buffer BUFFER, stripping some text properties. | |
1533 | BUFFER may be a buffer or a buffer name. Arguments START and END are | |
1534 | character numbers specifying the substring. They default to the | |
1535 | beginning and the end of BUFFER. Strip text properties from the | |
1536 | inserted text according to `yank-excluded-properties'." | |
1537 | (let ((opoint (point))) | |
1538 | (insert-buffer-substring buf start end) | |
8ed59ad5 | 1539 | (remove-yank-excluded-properties opoint (point)))) |
3b8690f6 | 1540 | |
2493767e RS |
1541 | \f |
1542 | ;; Synchronous shell commands. | |
1543 | ||
be9b65ac DL |
1544 | (defun start-process-shell-command (name buffer &rest args) |
1545 | "Start a program in a subprocess. Return the process object for it. | |
1546 | Args are NAME BUFFER COMMAND &rest COMMAND-ARGS. | |
1547 | NAME is name for process. It is modified if necessary to make it unique. | |
1548 | BUFFER is the buffer or (buffer-name) to associate with the process. | |
1549 | Process output goes at end of that buffer, unless you specify | |
1550 | an output stream or filter function to handle the output. | |
1551 | BUFFER may be also nil, meaning that this process is not associated | |
1552 | with any buffer | |
1553 | Third arg is command name, the name of a shell command. | |
1554 | Remaining arguments are the arguments for the command. | |
4f1d6310 | 1555 | Wildcards and redirection are handled as usual in the shell." |
a247bf21 KH |
1556 | (cond |
1557 | ((eq system-type 'vax-vms) | |
1558 | (apply 'start-process name buffer args)) | |
b59f6d7a RS |
1559 | ;; We used to use `exec' to replace the shell with the command, |
1560 | ;; but that failed to handle (...) and semicolon, etc. | |
a247bf21 KH |
1561 | (t |
1562 | (start-process name buffer shell-file-name shell-command-switch | |
b59f6d7a | 1563 | (mapconcat 'identity args " "))))) |
93aca633 MB |
1564 | |
1565 | (defun call-process-shell-command (command &optional infile buffer display | |
1566 | &rest args) | |
1567 | "Execute the shell command COMMAND synchronously in separate process. | |
1568 | The remaining arguments are optional. | |
1569 | The program's input comes from file INFILE (nil means `/dev/null'). | |
1570 | Insert output in BUFFER before point; t means current buffer; | |
1571 | nil for BUFFER means discard it; 0 means discard and don't wait. | |
1572 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, | |
1573 | REAL-BUFFER says what to do with standard output, as above, | |
1574 | while STDERR-FILE says what to do with standard error in the child. | |
1575 | STDERR-FILE may be nil (discard standard error output), | |
1576 | t (mix it with ordinary output), or a file name string. | |
1577 | ||
1578 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
1579 | Remaining arguments are strings passed as additional arguments for COMMAND. | |
1580 | Wildcards and redirection are handled as usual in the shell. | |
1581 | ||
1582 | If BUFFER is 0, `call-process-shell-command' returns immediately with value nil. | |
1583 | Otherwise it waits for COMMAND to terminate and returns a numeric exit | |
1584 | status or a signal description string. | |
1585 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again." | |
1586 | (cond | |
1587 | ((eq system-type 'vax-vms) | |
1588 | (apply 'call-process command infile buffer display args)) | |
1589 | ;; We used to use `exec' to replace the shell with the command, | |
1590 | ;; but that failed to handle (...) and semicolon, etc. | |
1591 | (t | |
1592 | (call-process shell-file-name | |
1593 | infile buffer display | |
1594 | shell-command-switch | |
1595 | (mapconcat 'identity (cons command args) " "))))) | |
a7ed4c2a | 1596 | \f |
a7f284ec RS |
1597 | (defmacro with-current-buffer (buffer &rest body) |
1598 | "Execute the forms in BODY with BUFFER as the current buffer. | |
a2fdb55c EN |
1599 | The value returned is the value of the last form in BODY. |
1600 | See also `with-temp-buffer'." | |
ce87039d SM |
1601 | (cons 'save-current-buffer |
1602 | (cons (list 'set-buffer buffer) | |
1603 | body))) | |
a7f284ec | 1604 | |
e5bb8a8c SM |
1605 | (defmacro with-temp-file (file &rest body) |
1606 | "Create a new buffer, evaluate BODY there, and write the buffer to FILE. | |
1607 | The value returned is the value of the last form in BODY. | |
a2fdb55c | 1608 | See also `with-temp-buffer'." |
a7ed4c2a | 1609 | (let ((temp-file (make-symbol "temp-file")) |
a2fdb55c EN |
1610 | (temp-buffer (make-symbol "temp-buffer"))) |
1611 | `(let ((,temp-file ,file) | |
1612 | (,temp-buffer | |
1613 | (get-buffer-create (generate-new-buffer-name " *temp file*")))) | |
1614 | (unwind-protect | |
1615 | (prog1 | |
1616 | (with-current-buffer ,temp-buffer | |
e5bb8a8c | 1617 | ,@body) |
a2fdb55c EN |
1618 | (with-current-buffer ,temp-buffer |
1619 | (widen) | |
1620 | (write-region (point-min) (point-max) ,temp-file nil 0))) | |
1621 | (and (buffer-name ,temp-buffer) | |
1622 | (kill-buffer ,temp-buffer)))))) | |
1623 | ||
e5bb8a8c | 1624 | (defmacro with-temp-message (message &rest body) |
a600effe | 1625 | "Display MESSAGE temporarily if non-nil while BODY is evaluated. |
e5bb8a8c SM |
1626 | The original message is restored to the echo area after BODY has finished. |
1627 | The value returned is the value of the last form in BODY. | |
a600effe SM |
1628 | MESSAGE is written to the message log buffer if `message-log-max' is non-nil. |
1629 | If MESSAGE is nil, the echo area and message log buffer are unchanged. | |
1630 | Use a MESSAGE of \"\" to temporarily clear the echo area." | |
110201c8 SM |
1631 | (let ((current-message (make-symbol "current-message")) |
1632 | (temp-message (make-symbol "with-temp-message"))) | |
1633 | `(let ((,temp-message ,message) | |
1634 | (,current-message)) | |
e5bb8a8c SM |
1635 | (unwind-protect |
1636 | (progn | |
110201c8 SM |
1637 | (when ,temp-message |
1638 | (setq ,current-message (current-message)) | |
aadf7ff3 | 1639 | (message "%s" ,temp-message)) |
e5bb8a8c | 1640 | ,@body) |
cad84646 RS |
1641 | (and ,temp-message |
1642 | (if ,current-message | |
1643 | (message "%s" ,current-message) | |
1644 | (message nil))))))) | |
e5bb8a8c SM |
1645 | |
1646 | (defmacro with-temp-buffer (&rest body) | |
1647 | "Create a temporary buffer, and evaluate BODY there like `progn'. | |
a2fdb55c EN |
1648 | See also `with-temp-file' and `with-output-to-string'." |
1649 | (let ((temp-buffer (make-symbol "temp-buffer"))) | |
1650 | `(let ((,temp-buffer | |
1651 | (get-buffer-create (generate-new-buffer-name " *temp*")))) | |
1652 | (unwind-protect | |
1653 | (with-current-buffer ,temp-buffer | |
e5bb8a8c | 1654 | ,@body) |
a2fdb55c EN |
1655 | (and (buffer-name ,temp-buffer) |
1656 | (kill-buffer ,temp-buffer)))))) | |
1657 | ||
5db7925d RS |
1658 | (defmacro with-output-to-string (&rest body) |
1659 | "Execute BODY, return the text it sent to `standard-output', as a string." | |
a2fdb55c EN |
1660 | `(let ((standard-output |
1661 | (get-buffer-create (generate-new-buffer-name " *string-output*")))) | |
5db7925d RS |
1662 | (let ((standard-output standard-output)) |
1663 | ,@body) | |
a2fdb55c EN |
1664 | (with-current-buffer standard-output |
1665 | (prog1 | |
1666 | (buffer-string) | |
1667 | (kill-buffer nil))))) | |
2ec9c94e | 1668 | |
0764e16f SM |
1669 | (defmacro with-local-quit (&rest body) |
1670 | "Execute BODY with `inhibit-quit' temporarily bound to nil." | |
12320833 | 1671 | (declare (debug t) (indent 0)) |
0764e16f SM |
1672 | `(condition-case nil |
1673 | (let ((inhibit-quit nil)) | |
1674 | ,@body) | |
1675 | (quit (setq quit-flag t)))) | |
1676 | ||
2ec9c94e RS |
1677 | (defmacro combine-after-change-calls (&rest body) |
1678 | "Execute BODY, but don't call the after-change functions till the end. | |
1679 | If BODY makes changes in the buffer, they are recorded | |
1680 | and the functions on `after-change-functions' are called several times | |
1681 | when BODY is finished. | |
31aa282e | 1682 | The return value is the value of the last form in BODY. |
2ec9c94e RS |
1683 | |
1684 | If `before-change-functions' is non-nil, then calls to the after-change | |
1685 | functions can't be deferred, so in that case this macro has no effect. | |
1686 | ||
1687 | Do not alter `after-change-functions' or `before-change-functions' | |
1688 | in BODY." | |
1689 | `(unwind-protect | |
1690 | (let ((combine-after-change-calls t)) | |
1691 | . ,body) | |
1692 | (combine-after-change-execute))) | |
1693 | ||
c834b52c | 1694 | |
a13fe4c5 SM |
1695 | (defvar delay-mode-hooks nil |
1696 | "If non-nil, `run-mode-hooks' should delay running the hooks.") | |
1697 | (defvar delayed-mode-hooks nil | |
1698 | "List of delayed mode hooks waiting to be run.") | |
1699 | (make-variable-buffer-local 'delayed-mode-hooks) | |
1700 | ||
1701 | (defun run-mode-hooks (&rest hooks) | |
1702 | "Run mode hooks `delayed-mode-hooks' and HOOKS, or delay HOOKS. | |
1703 | Execution is delayed if `delay-mode-hooks' is non-nil. | |
1704 | Major mode functions should use this." | |
1705 | (if delay-mode-hooks | |
1706 | ;; Delaying case. | |
1707 | (dolist (hook hooks) | |
1708 | (push hook delayed-mode-hooks)) | |
1709 | ;; Normal case, just run the hook as before plus any delayed hooks. | |
1710 | (setq hooks (nconc (nreverse delayed-mode-hooks) hooks)) | |
1711 | (setq delayed-mode-hooks nil) | |
1712 | (apply 'run-hooks hooks))) | |
1713 | ||
1714 | (defmacro delay-mode-hooks (&rest body) | |
1715 | "Execute BODY, but delay any `run-mode-hooks'. | |
1716 | Only affects hooks run in the current buffer." | |
1717 | `(progn | |
1718 | (make-local-variable 'delay-mode-hooks) | |
1719 | (let ((delay-mode-hooks t)) | |
1720 | ,@body))) | |
1721 | ||
31ca596b RS |
1722 | ;; PUBLIC: find if the current mode derives from another. |
1723 | ||
1724 | (defun derived-mode-p (&rest modes) | |
1725 | "Non-nil if the current major mode is derived from one of MODES. | |
1726 | Uses the `derived-mode-parent' property of the symbol to trace backwards." | |
1727 | (let ((parent major-mode)) | |
1728 | (while (and (not (memq parent modes)) | |
1729 | (setq parent (get parent 'derived-mode-parent)))) | |
1730 | parent)) | |
1731 | ||
7e8539cc | 1732 | (defmacro with-syntax-table (table &rest body) |
7ec51784 | 1733 | "Evaluate BODY with syntax table of current buffer set to TABLE. |
7e8539cc RS |
1734 | The syntax table of the current buffer is saved, BODY is evaluated, and the |
1735 | saved table is restored, even in case of an abnormal exit. | |
1736 | Value is what BODY returns." | |
b3f07093 RS |
1737 | (let ((old-table (make-symbol "table")) |
1738 | (old-buffer (make-symbol "buffer"))) | |
7e8539cc RS |
1739 | `(let ((,old-table (syntax-table)) |
1740 | (,old-buffer (current-buffer))) | |
1741 | (unwind-protect | |
1742 | (progn | |
7ec51784 | 1743 | (set-syntax-table ,table) |
7e8539cc RS |
1744 | ,@body) |
1745 | (save-current-buffer | |
1746 | (set-buffer ,old-buffer) | |
1747 | (set-syntax-table ,old-table)))))) | |
a2fdb55c | 1748 | \f |
2493767e RS |
1749 | ;;; Matching and substitution |
1750 | ||
c7ca41e6 RS |
1751 | (defvar save-match-data-internal) |
1752 | ||
1753 | ;; We use save-match-data-internal as the local variable because | |
1754 | ;; that works ok in practice (people should not use that variable elsewhere). | |
1755 | ;; We used to use an uninterned symbol; the compiler handles that properly | |
1756 | ;; now, but it generates slower code. | |
9a5336ae | 1757 | (defmacro save-match-data (&rest body) |
e4d03691 JB |
1758 | "Execute the BODY forms, restoring the global value of the match data. |
1759 | The value returned is the value of the last form in BODY." | |
64ed733a PE |
1760 | ;; It is better not to use backquote here, |
1761 | ;; because that makes a bootstrapping problem | |
1762 | ;; if you need to recompile all the Lisp files using interpreted code. | |
1763 | (list 'let | |
1764 | '((save-match-data-internal (match-data))) | |
1765 | (list 'unwind-protect | |
1766 | (cons 'progn body) | |
1767 | '(set-match-data save-match-data-internal)))) | |
993713ce | 1768 | |
cd323f89 | 1769 | (defun match-string (num &optional string) |
993713ce SM |
1770 | "Return string of text matched by last search. |
1771 | NUM specifies which parenthesized expression in the last regexp. | |
1772 | Value is nil if NUMth pair didn't match, or there were less than NUM pairs. | |
1773 | Zero means the entire text matched by the whole regexp or whole string. | |
1774 | STRING should be given if the last search was by `string-match' on STRING." | |
cd323f89 SM |
1775 | (if (match-beginning num) |
1776 | (if string | |
1777 | (substring string (match-beginning num) (match-end num)) | |
1778 | (buffer-substring (match-beginning num) (match-end num))))) | |
58f950b4 | 1779 | |
bb760c71 RS |
1780 | (defun match-string-no-properties (num &optional string) |
1781 | "Return string of text matched by last search, without text properties. | |
1782 | NUM specifies which parenthesized expression in the last regexp. | |
1783 | Value is nil if NUMth pair didn't match, or there were less than NUM pairs. | |
1784 | Zero means the entire text matched by the whole regexp or whole string. | |
1785 | STRING should be given if the last search was by `string-match' on STRING." | |
1786 | (if (match-beginning num) | |
1787 | (if string | |
1788 | (let ((result | |
1789 | (substring string (match-beginning num) (match-end num)))) | |
1790 | (set-text-properties 0 (length result) nil result) | |
1791 | result) | |
1792 | (buffer-substring-no-properties (match-beginning num) | |
1793 | (match-end num))))) | |
1794 | ||
edce3654 RS |
1795 | (defun split-string (string &optional separators) |
1796 | "Splits STRING into substrings where there are matches for SEPARATORS. | |
1797 | Each match for SEPARATORS is a splitting point. | |
1798 | The substrings between the splitting points are made into a list | |
1799 | which is returned. | |
b222b786 RS |
1800 | If SEPARATORS is absent, it defaults to \"[ \\f\\t\\n\\r\\v]+\". |
1801 | ||
1802 | If there is match for SEPARATORS at the beginning of STRING, we do not | |
1803 | include a null substring for that. Likewise, if there is a match | |
b021ef18 DL |
1804 | at the end of STRING, we don't include a null substring for that. |
1805 | ||
1806 | Modifies the match data; use `save-match-data' if necessary." | |
edce3654 RS |
1807 | (let ((rexp (or separators "[ \f\t\n\r\v]+")) |
1808 | (start 0) | |
b222b786 | 1809 | notfirst |
edce3654 | 1810 | (list nil)) |
b222b786 RS |
1811 | (while (and (string-match rexp string |
1812 | (if (and notfirst | |
1813 | (= start (match-beginning 0)) | |
1814 | (< start (length string))) | |
1815 | (1+ start) start)) | |
1816 | (< (match-beginning 0) (length string))) | |
1817 | (setq notfirst t) | |
7eb47123 | 1818 | (or (eq (match-beginning 0) 0) |
b222b786 RS |
1819 | (and (eq (match-beginning 0) (match-end 0)) |
1820 | (eq (match-beginning 0) start)) | |
edce3654 RS |
1821 | (setq list |
1822 | (cons (substring string start (match-beginning 0)) | |
1823 | list))) | |
1824 | (setq start (match-end 0))) | |
1825 | (or (eq start (length string)) | |
1826 | (setq list | |
1827 | (cons (substring string start) | |
1828 | list))) | |
1829 | (nreverse list))) | |
1ccaea52 AI |
1830 | |
1831 | (defun subst-char-in-string (fromchar tochar string &optional inplace) | |
1832 | "Replace FROMCHAR with TOCHAR in STRING each time it occurs. | |
1833 | Unless optional argument INPLACE is non-nil, return a new string." | |
e6e71807 SM |
1834 | (let ((i (length string)) |
1835 | (newstr (if inplace string (copy-sequence string)))) | |
1836 | (while (> i 0) | |
1837 | (setq i (1- i)) | |
1838 | (if (eq (aref newstr i) fromchar) | |
1839 | (aset newstr i tochar))) | |
1840 | newstr)) | |
b021ef18 | 1841 | |
1697159c DL |
1842 | (defun replace-regexp-in-string (regexp rep string &optional |
1843 | fixedcase literal subexp start) | |
b021ef18 DL |
1844 | "Replace all matches for REGEXP with REP in STRING. |
1845 | ||
1846 | Return a new string containing the replacements. | |
1847 | ||
1848 | Optional arguments FIXEDCASE, LITERAL and SUBEXP are like the | |
1849 | arguments with the same names of function `replace-match'. If START | |
1850 | is non-nil, start replacements at that index in STRING. | |
1851 | ||
1852 | REP is either a string used as the NEWTEXT arg of `replace-match' or a | |
1853 | function. If it is a function it is applied to each match to generate | |
1854 | the replacement passed to `replace-match'; the match-data at this | |
1855 | point are such that match 0 is the function's argument. | |
1856 | ||
1697159c DL |
1857 | To replace only the first match (if any), make REGEXP match up to \\' |
1858 | and replace a sub-expression, e.g. | |
c9bcb507 | 1859 | (replace-regexp-in-string \"\\\\(foo\\\\).*\\\\'\" \"bar\" \" foo foo\" nil nil 1) |
1697159c DL |
1860 | => \" bar foo\" |
1861 | " | |
b021ef18 DL |
1862 | |
1863 | ;; To avoid excessive consing from multiple matches in long strings, | |
1864 | ;; don't just call `replace-match' continually. Walk down the | |
1865 | ;; string looking for matches of REGEXP and building up a (reversed) | |
1866 | ;; list MATCHES. This comprises segments of STRING which weren't | |
1867 | ;; matched interspersed with replacements for segments that were. | |
08b1f8a1 | 1868 | ;; [For a `large' number of replacements it's more efficient to |
b021ef18 DL |
1869 | ;; operate in a temporary buffer; we can't tell from the function's |
1870 | ;; args whether to choose the buffer-based implementation, though it | |
1871 | ;; might be reasonable to do so for long enough STRING.] | |
1872 | (let ((l (length string)) | |
1873 | (start (or start 0)) | |
1874 | matches str mb me) | |
1875 | (save-match-data | |
1876 | (while (and (< start l) (string-match regexp string start)) | |
1877 | (setq mb (match-beginning 0) | |
1878 | me (match-end 0)) | |
a9853251 SM |
1879 | ;; If we matched the empty string, make sure we advance by one char |
1880 | (when (= me mb) (setq me (min l (1+ mb)))) | |
1881 | ;; Generate a replacement for the matched substring. | |
1882 | ;; Operate only on the substring to minimize string consing. | |
1883 | ;; Set up match data for the substring for replacement; | |
1884 | ;; presumably this is likely to be faster than munging the | |
1885 | ;; match data directly in Lisp. | |
1886 | (string-match regexp (setq str (substring string mb me))) | |
1887 | (setq matches | |
1888 | (cons (replace-match (if (stringp rep) | |
1889 | rep | |
1890 | (funcall rep (match-string 0 str))) | |
1891 | fixedcase literal str subexp) | |
1892 | (cons (substring string start mb) ; unmatched prefix | |
1893 | matches))) | |
1894 | (setq start me)) | |
b021ef18 DL |
1895 | ;; Reconstruct a string from the pieces. |
1896 | (setq matches (cons (substring string start l) matches)) ; leftover | |
1897 | (apply #'concat (nreverse matches))))) | |
a7ed4c2a | 1898 | \f |
8af7df60 RS |
1899 | (defun shell-quote-argument (argument) |
1900 | "Quote an argument for passing as argument to an inferior shell." | |
c1c74b43 | 1901 | (if (eq system-type 'ms-dos) |
8ee75d03 EZ |
1902 | ;; Quote using double quotes, but escape any existing quotes in |
1903 | ;; the argument with backslashes. | |
1904 | (let ((result "") | |
1905 | (start 0) | |
1906 | end) | |
1907 | (if (or (null (string-match "[^\"]" argument)) | |
1908 | (< (match-end 0) (length argument))) | |
1909 | (while (string-match "[\"]" argument start) | |
1910 | (setq end (match-beginning 0) | |
1911 | result (concat result (substring argument start end) | |
1912 | "\\" (substring argument end (1+ end))) | |
1913 | start (1+ end)))) | |
1914 | (concat "\"" result (substring argument start) "\"")) | |
c1c74b43 RS |
1915 | (if (eq system-type 'windows-nt) |
1916 | (concat "\"" argument "\"") | |
e1b65a6b RS |
1917 | (if (equal argument "") |
1918 | "''" | |
1919 | ;; Quote everything except POSIX filename characters. | |
1920 | ;; This should be safe enough even for really weird shells. | |
1921 | (let ((result "") (start 0) end) | |
1922 | (while (string-match "[^-0-9a-zA-Z_./]" argument start) | |
1923 | (setq end (match-beginning 0) | |
1924 | result (concat result (substring argument start end) | |
1925 | "\\" (substring argument end (1+ end))) | |
1926 | start (1+ end))) | |
1927 | (concat result (substring argument start))))))) | |
8af7df60 | 1928 | |
297d863b | 1929 | (defun make-syntax-table (&optional oldtable) |
984f718a | 1930 | "Return a new syntax table. |
0764e16f SM |
1931 | Create a syntax table which inherits from OLDTABLE (if non-nil) or |
1932 | from `standard-syntax-table' otherwise." | |
1933 | (let ((table (make-char-table 'syntax-table nil))) | |
1934 | (set-char-table-parent table (or oldtable (standard-syntax-table))) | |
1935 | table)) | |
31aa282e | 1936 | |
e9f13a95 SM |
1937 | (defun syntax-after (pos) |
1938 | "Return the syntax of the char after POS." | |
1939 | (unless (or (< pos (point-min)) (>= pos (point-max))) | |
1940 | (let ((st (if parse-sexp-lookup-properties | |
1941 | (get-char-property pos 'syntax-table)))) | |
1942 | (if (consp st) st | |
1943 | (aref (or st (syntax-table)) (char-after pos)))))) | |
1944 | ||
31aa282e KH |
1945 | (defun add-to-invisibility-spec (arg) |
1946 | "Add elements to `buffer-invisibility-spec'. | |
1947 | See documentation for `buffer-invisibility-spec' for the kind of elements | |
1948 | that can be added." | |
c525c13c RS |
1949 | (if (eq buffer-invisibility-spec t) |
1950 | (setq buffer-invisibility-spec (list t))) | |
1951 | (setq buffer-invisibility-spec | |
1952 | (cons arg buffer-invisibility-spec))) | |
31aa282e KH |
1953 | |
1954 | (defun remove-from-invisibility-spec (arg) | |
1955 | "Remove elements from `buffer-invisibility-spec'." | |
e93b8cbb | 1956 | (if (consp buffer-invisibility-spec) |
071a2a71 | 1957 | (setq buffer-invisibility-spec (delete arg buffer-invisibility-spec)))) |
baed0109 RS |
1958 | \f |
1959 | (defun global-set-key (key command) | |
1960 | "Give KEY a global binding as COMMAND. | |
7bba1895 KH |
1961 | COMMAND is the command definition to use; usually it is |
1962 | a symbol naming an interactively-callable function. | |
1963 | KEY is a key sequence; noninteractively, it is a string or vector | |
1964 | of characters or event types, and non-ASCII characters with codes | |
1965 | above 127 (such as ISO Latin-1) can be included if you use a vector. | |
1966 | ||
1967 | Note that if KEY has a local binding in the current buffer, | |
1968 | that local binding will continue to shadow any global binding | |
1969 | that you make with this function." | |
baed0109 | 1970 | (interactive "KSet key globally: \nCSet key %s to command: ") |
a2f9aa84 | 1971 | (or (vectorp key) (stringp key) |
baed0109 | 1972 | (signal 'wrong-type-argument (list 'arrayp key))) |
ff663bbe | 1973 | (define-key (current-global-map) key command)) |
baed0109 RS |
1974 | |
1975 | (defun local-set-key (key command) | |
1976 | "Give KEY a local binding as COMMAND. | |
7bba1895 KH |
1977 | COMMAND is the command definition to use; usually it is |
1978 | a symbol naming an interactively-callable function. | |
1979 | KEY is a key sequence; noninteractively, it is a string or vector | |
1980 | of characters or event types, and non-ASCII characters with codes | |
1981 | above 127 (such as ISO Latin-1) can be included if you use a vector. | |
1982 | ||
baed0109 RS |
1983 | The binding goes in the current buffer's local map, |
1984 | which in most cases is shared with all other buffers in the same major mode." | |
1985 | (interactive "KSet key locally: \nCSet key %s locally to command: ") | |
1986 | (let ((map (current-local-map))) | |
1987 | (or map | |
1988 | (use-local-map (setq map (make-sparse-keymap)))) | |
a2f9aa84 | 1989 | (or (vectorp key) (stringp key) |
baed0109 | 1990 | (signal 'wrong-type-argument (list 'arrayp key))) |
ff663bbe | 1991 | (define-key map key command))) |
984f718a | 1992 | |
baed0109 RS |
1993 | (defun global-unset-key (key) |
1994 | "Remove global binding of KEY. | |
1995 | KEY is a string representing a sequence of keystrokes." | |
1996 | (interactive "kUnset key globally: ") | |
1997 | (global-set-key key nil)) | |
1998 | ||
db2474b8 | 1999 | (defun local-unset-key (key) |
baed0109 RS |
2000 | "Remove local binding of KEY. |
2001 | KEY is a string representing a sequence of keystrokes." | |
2002 | (interactive "kUnset key locally: ") | |
2003 | (if (current-local-map) | |
db2474b8 | 2004 | (local-set-key key nil)) |
baed0109 RS |
2005 | nil) |
2006 | \f | |
4809d0dd KH |
2007 | ;; We put this here instead of in frame.el so that it's defined even on |
2008 | ;; systems where frame.el isn't loaded. | |
2009 | (defun frame-configuration-p (object) | |
2010 | "Return non-nil if OBJECT seems to be a frame configuration. | |
2011 | Any list whose car is `frame-configuration' is assumed to be a frame | |
2012 | configuration." | |
2013 | (and (consp object) | |
2014 | (eq (car object) 'frame-configuration))) | |
2015 | ||
a9a44ed1 | 2016 | (defun functionp (object) |
0764e16f | 2017 | "Non-nil iff OBJECT is a type of object that can be called as a function." |
a2d7836f | 2018 | (or (and (symbolp object) (fboundp object) |
d7d563e3 RS |
2019 | (condition-case nil |
2020 | (setq object (indirect-function object)) | |
2021 | (error nil)) | |
0764e16f | 2022 | (eq (car-safe object) 'autoload) |
f1d37f3c | 2023 | (not (car-safe (cdr-safe (cdr-safe (cdr-safe (cdr-safe object))))))) |
0764e16f | 2024 | (subrp object) (byte-code-function-p object) |
60ab6064 | 2025 | (eq (car-safe object) 'lambda))) |
a9a44ed1 | 2026 | |
f65fab59 GM |
2027 | (defun interactive-form (function) |
2028 | "Return the interactive form of FUNCTION. | |
2029 | If function is a command (see `commandp'), value is a list of the form | |
d3200788 | 2030 | \(interactive SPEC). If function is not a command, return nil." |
f65fab59 GM |
2031 | (setq function (indirect-function function)) |
2032 | (when (commandp function) | |
2033 | (cond ((byte-code-function-p function) | |
2034 | (when (> (length function) 5) | |
2035 | (let ((spec (aref function 5))) | |
2036 | (if spec | |
2037 | (list 'interactive spec) | |
2038 | (list 'interactive))))) | |
2039 | ((subrp function) | |
2040 | (subr-interactive-form function)) | |
2041 | ((eq (car-safe function) 'lambda) | |
2042 | (setq function (cddr function)) | |
2043 | (when (stringp (car function)) | |
2044 | (setq function (cdr function))) | |
2045 | (let ((form (car function))) | |
a27b451e | 2046 | (when (eq (car-safe form) 'interactive) |
f65fab59 | 2047 | (copy-sequence form))))))) |
630cc463 | 2048 | |
d3a61a11 | 2049 | (defun assq-delete-all (key alist) |
a62d6695 DL |
2050 | "Delete from ALIST all elements whose car is KEY. |
2051 | Return the modified alist." | |
a62d6695 DL |
2052 | (let ((tail alist)) |
2053 | (while tail | |
2054 | (if (eq (car (car tail)) key) | |
2055 | (setq alist (delq (car tail) alist))) | |
2056 | (setq tail (cdr tail))) | |
2057 | alist)) | |
2058 | ||
10cf1ba8 | 2059 | (defun make-temp-file (prefix &optional dir-flag suffix) |
cdd9f643 RS |
2060 | "Create a temporary file. |
2061 | The returned file name (created by appending some random characters at the end | |
5ef6a86d | 2062 | of PREFIX, and expanding against `temporary-file-directory' if necessary), |
cdd9f643 RS |
2063 | is guaranteed to point to a newly created empty file. |
2064 | You can then use `write-region' to write new data into the file. | |
2065 | ||
10cf1ba8 RS |
2066 | If DIR-FLAG is non-nil, create a new empty directory instead of a file. |
2067 | ||
2068 | If SUFFIX is non-nil, add that at the end of the file name." | |
1c12af5c SM |
2069 | (let ((umask (default-file-modes)) |
2070 | file) | |
2071 | (unwind-protect | |
2072 | (progn | |
2073 | ;; Create temp files with strict access rights. It's easy to | |
2074 | ;; loosen them later, whereas it's impossible to close the | |
2075 | ;; time-window of loose permissions otherwise. | |
2076 | (set-default-file-modes ?\700) | |
2077 | (while (condition-case () | |
2078 | (progn | |
2079 | (setq file | |
2080 | (make-temp-name | |
2081 | (expand-file-name prefix temporary-file-directory))) | |
2082 | (if suffix | |
2083 | (setq file (concat file suffix))) | |
2084 | (if dir-flag | |
2085 | (make-directory file) | |
2086 | (write-region "" nil file nil 'silent nil 'excl)) | |
2087 | nil) | |
2088 | (file-already-exists t)) | |
2089 | ;; the file was somehow created by someone else between | |
2090 | ;; `make-temp-name' and `write-region', let's try again. | |
2091 | nil) | |
2092 | file) | |
2093 | ;; Reset the umask. | |
2094 | (set-default-file-modes umask)))) | |
cdd9f643 | 2095 | |
d7d47268 | 2096 | \f |
7dde432d RS |
2097 | ;; If a minor mode is not defined with define-minor-mode, |
2098 | ;; add it here explicitly. | |
2099 | ;; isearch-mode is deliberately excluded, since you should | |
2100 | ;; not call it yourself. | |
2101 | (defvar minor-mode-list '(auto-save-mode auto-fill-mode abbrev-mode | |
2102 | overwrite-mode view-mode) | |
2103 | "List of all minor mode functions.") | |
2104 | ||
c94f4677 | 2105 | (defun add-minor-mode (toggle name &optional keymap after toggle-fun) |
d7d47268 | 2106 | "Register a new minor mode. |
c94f4677 | 2107 | |
0b2cf11f SM |
2108 | This is an XEmacs-compatibility function. Use `define-minor-mode' instead. |
2109 | ||
c94f4677 GM |
2110 | TOGGLE is a symbol which is the name of a buffer-local variable that |
2111 | is toggled on or off to say whether the minor mode is active or not. | |
2112 | ||
2113 | NAME specifies what will appear in the mode line when the minor mode | |
2114 | is active. NAME should be either a string starting with a space, or a | |
2115 | symbol whose value is such a string. | |
2116 | ||
2117 | Optional KEYMAP is the keymap for the minor mode that will be added | |
2118 | to `minor-mode-map-alist'. | |
2119 | ||
2120 | Optional AFTER specifies that TOGGLE should be added after AFTER | |
2121 | in `minor-mode-alist'. | |
2122 | ||
0b2cf11f SM |
2123 | Optional TOGGLE-FUN is an interactive function to toggle the mode. |
2124 | It defaults to (and should by convention be) TOGGLE. | |
2125 | ||
2126 | If TOGGLE has a non-nil `:included' property, an entry for the mode is | |
2127 | included in the mode-line minor mode menu. | |
2128 | If TOGGLE has a `:menu-tag', that is used for the menu item's label." | |
7dde432d RS |
2129 | (unless (memq toggle minor-mode-list) |
2130 | (push toggle minor-mode-list)) | |
2131 | ||
0b2cf11f | 2132 | (unless toggle-fun (setq toggle-fun toggle)) |
0b2cf11f | 2133 | ;; Add the name to the minor-mode-alist. |
c94f4677 | 2134 | (when name |
0b2cf11f | 2135 | (let ((existing (assq toggle minor-mode-alist))) |
0b2cf11f SM |
2136 | (if existing |
2137 | (setcdr existing (list name)) | |
2138 | (let ((tail minor-mode-alist) found) | |
2139 | (while (and tail (not found)) | |
2140 | (if (eq after (caar tail)) | |
2141 | (setq found tail) | |
2142 | (setq tail (cdr tail)))) | |
2143 | (if found | |
2144 | (let ((rest (cdr found))) | |
2145 | (setcdr found nil) | |
2146 | (nconc found (list (list toggle name)) rest)) | |
2147 | (setq minor-mode-alist (cons (list toggle name) | |
2148 | minor-mode-alist))))))) | |
69cae2d4 RS |
2149 | ;; Add the toggle to the minor-modes menu if requested. |
2150 | (when (get toggle :included) | |
2151 | (define-key mode-line-mode-menu | |
2152 | (vector toggle) | |
2153 | (list 'menu-item | |
2154 | (concat | |
2155 | (or (get toggle :menu-tag) | |
2156 | (if (stringp name) name (symbol-name toggle))) | |
1c12af5c SM |
2157 | (let ((mode-name (if (symbolp name) (symbol-value name)))) |
2158 | (if (and (stringp mode-name) (string-match "[^ ]+" mode-name)) | |
2159 | (concat " (" (match-string 0 mode-name) ")")))) | |
69cae2d4 RS |
2160 | toggle-fun |
2161 | :button (cons :toggle toggle)))) | |
2162 | ||
1c12af5c | 2163 | ;; Add the map to the minor-mode-map-alist. |
c94f4677 GM |
2164 | (when keymap |
2165 | (let ((existing (assq toggle minor-mode-map-alist))) | |
0b2cf11f SM |
2166 | (if existing |
2167 | (setcdr existing keymap) | |
2168 | (let ((tail minor-mode-map-alist) found) | |
2169 | (while (and tail (not found)) | |
2170 | (if (eq after (caar tail)) | |
2171 | (setq found tail) | |
2172 | (setq tail (cdr tail)))) | |
2173 | (if found | |
2174 | (let ((rest (cdr found))) | |
2175 | (setcdr found nil) | |
2176 | (nconc found (list (cons toggle keymap)) rest)) | |
2177 | (setq minor-mode-map-alist (cons (cons toggle keymap) | |
2178 | minor-mode-map-alist)))))))) | |
2493767e | 2179 | \f |
a13fe4c5 SM |
2180 | ;; Clones ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2181 | ||
2182 | (defun text-clone-maintain (ol1 after beg end &optional len) | |
2183 | "Propagate the changes made under the overlay OL1 to the other clones. | |
2184 | This is used on the `modification-hooks' property of text clones." | |
2185 | (when (and after (not undo-in-progress) (overlay-start ol1)) | |
2186 | (let ((margin (if (overlay-get ol1 'text-clone-spreadp) 1 0))) | |
2187 | (setq beg (max beg (+ (overlay-start ol1) margin))) | |
2188 | (setq end (min end (- (overlay-end ol1) margin))) | |
2189 | (when (<= beg end) | |
2190 | (save-excursion | |
2191 | (when (overlay-get ol1 'text-clone-syntax) | |
2192 | ;; Check content of the clone's text. | |
2193 | (let ((cbeg (+ (overlay-start ol1) margin)) | |
2194 | (cend (- (overlay-end ol1) margin))) | |
2195 | (goto-char cbeg) | |
2196 | (save-match-data | |
2197 | (if (not (re-search-forward | |
2198 | (overlay-get ol1 'text-clone-syntax) cend t)) | |
2199 | ;; Mark the overlay for deletion. | |
2200 | (overlay-put ol1 'text-clones nil) | |
2201 | (when (< (match-end 0) cend) | |
2202 | ;; Shrink the clone at its end. | |
2203 | (setq end (min end (match-end 0))) | |
2204 | (move-overlay ol1 (overlay-start ol1) | |
2205 | (+ (match-end 0) margin))) | |
2206 | (when (> (match-beginning 0) cbeg) | |
2207 | ;; Shrink the clone at its beginning. | |
2208 | (setq beg (max (match-beginning 0) beg)) | |
2209 | (move-overlay ol1 (- (match-beginning 0) margin) | |
2210 | (overlay-end ol1))))))) | |
2211 | ;; Now go ahead and update the clones. | |
2212 | (let ((head (- beg (overlay-start ol1))) | |
2213 | (tail (- (overlay-end ol1) end)) | |
2214 | (str (buffer-substring beg end)) | |
2215 | (nothing-left t) | |
2216 | (inhibit-modification-hooks t)) | |
2217 | (dolist (ol2 (overlay-get ol1 'text-clones)) | |
2218 | (let ((oe (overlay-end ol2))) | |
2219 | (unless (or (eq ol1 ol2) (null oe)) | |
2220 | (setq nothing-left nil) | |
2221 | (let ((mod-beg (+ (overlay-start ol2) head))) | |
2222 | ;;(overlay-put ol2 'modification-hooks nil) | |
2223 | (goto-char (- (overlay-end ol2) tail)) | |
2224 | (unless (> mod-beg (point)) | |
2225 | (save-excursion (insert str)) | |
2226 | (delete-region mod-beg (point))) | |
2227 | ;;(overlay-put ol2 'modification-hooks '(text-clone-maintain)) | |
2228 | )))) | |
2229 | (if nothing-left (delete-overlay ol1)))))))) | |
2230 | ||
2231 | (defun text-clone-create (start end &optional spreadp syntax) | |
2232 | "Create a text clone of START...END at point. | |
2233 | Text clones are chunks of text that are automatically kept identical: | |
2234 | changes done to one of the clones will be immediately propagated to the other. | |
2235 | ||
2236 | The buffer's content at point is assumed to be already identical to | |
2237 | the one between START and END. | |
2238 | If SYNTAX is provided it's a regexp that describes the possible text of | |
2239 | the clones; the clone will be shrunk or killed if necessary to ensure that | |
2240 | its text matches the regexp. | |
2241 | If SPREADP is non-nil it indicates that text inserted before/after the | |
2242 | clone should be incorporated in the clone." | |
2243 | ;; To deal with SPREADP we can either use an overlay with `nil t' along | |
2244 | ;; with insert-(behind|in-front-of)-hooks or use a slightly larger overlay | |
2245 | ;; (with a one-char margin at each end) with `t nil'. | |
2246 | ;; We opted for a larger overlay because it behaves better in the case | |
2247 | ;; where the clone is reduced to the empty string (we want the overlay to | |
2248 | ;; stay when the clone's content is the empty string and we want to use | |
2249 | ;; `evaporate' to make sure those overlays get deleted when needed). | |
264ef586 | 2250 | ;; |
a13fe4c5 SM |
2251 | (let* ((pt-end (+ (point) (- end start))) |
2252 | (start-margin (if (or (not spreadp) (bobp) (<= start (point-min))) | |
2253 | 0 1)) | |
2254 | (end-margin (if (or (not spreadp) | |
2255 | (>= pt-end (point-max)) | |
2256 | (>= start (point-max))) | |
2257 | 0 1)) | |
2258 | (ol1 (make-overlay (- start start-margin) (+ end end-margin) nil t)) | |
2259 | (ol2 (make-overlay (- (point) start-margin) (+ pt-end end-margin) nil t)) | |
2260 | (dups (list ol1 ol2))) | |
2261 | (overlay-put ol1 'modification-hooks '(text-clone-maintain)) | |
2262 | (when spreadp (overlay-put ol1 'text-clone-spreadp t)) | |
2263 | (when syntax (overlay-put ol1 'text-clone-syntax syntax)) | |
2264 | ;;(overlay-put ol1 'face 'underline) | |
2265 | (overlay-put ol1 'evaporate t) | |
2266 | (overlay-put ol1 'text-clones dups) | |
264ef586 | 2267 | ;; |
a13fe4c5 SM |
2268 | (overlay-put ol2 'modification-hooks '(text-clone-maintain)) |
2269 | (when spreadp (overlay-put ol2 'text-clone-spreadp t)) | |
2270 | (when syntax (overlay-put ol2 'text-clone-syntax syntax)) | |
2271 | ;;(overlay-put ol2 'face 'underline) | |
2272 | (overlay-put ol2 'evaporate t) | |
2273 | (overlay-put ol2 'text-clones dups))) | |
27c079eb | 2274 | |
324cd947 PJ |
2275 | (defun play-sound (sound) |
2276 | "SOUND is a list of the form `(sound KEYWORD VALUE...)'. | |
2277 | The following keywords are recognized: | |
2278 | ||
2279 | :file FILE - read sound data from FILE. If FILE isn't an | |
2280 | absolute file name, it is searched in `data-directory'. | |
2281 | ||
2282 | :data DATA - read sound data from string DATA. | |
2283 | ||
2284 | Exactly one of :file or :data must be present. | |
2285 | ||
2286 | :volume VOL - set volume to VOL. VOL must an integer in the | |
2287 | range 0..100 or a float in the range 0..1.0. If not specified, | |
2288 | don't change the volume setting of the sound device. | |
2289 | ||
2290 | :device DEVICE - play sound on DEVICE. If not specified, | |
2291 | a system-dependent default device name is used." | |
2292 | (unless (fboundp 'play-sound-internal) | |
2293 | (error "This Emacs binary lacks sound support")) | |
2294 | (play-sound-internal sound)) | |
2295 | ||
27c079eb SM |
2296 | (defun define-mail-user-agent (symbol composefunc sendfunc |
2297 | &optional abortfunc hookvar) | |
2298 | "Define a symbol to identify a mail-sending package for `mail-user-agent'. | |
2299 | ||
2300 | SYMBOL can be any Lisp symbol. Its function definition and/or | |
2301 | value as a variable do not matter for this usage; we use only certain | |
2302 | properties on its property list, to encode the rest of the arguments. | |
2303 | ||
2304 | COMPOSEFUNC is program callable function that composes an outgoing | |
2305 | mail message buffer. This function should set up the basics of the | |
2306 | buffer without requiring user interaction. It should populate the | |
2307 | standard mail headers, leaving the `to:' and `subject:' headers blank | |
2308 | by default. | |
2309 | ||
2310 | COMPOSEFUNC should accept several optional arguments--the same | |
2311 | arguments that `compose-mail' takes. See that function's documentation. | |
2312 | ||
2313 | SENDFUNC is the command a user would run to send the message. | |
2314 | ||
2315 | Optional ABORTFUNC is the command a user would run to abort the | |
2316 | message. For mail packages that don't have a separate abort function, | |
2317 | this can be `kill-buffer' (the equivalent of omitting this argument). | |
2318 | ||
2319 | Optional HOOKVAR is a hook variable that gets run before the message | |
2320 | is actually sent. Callers that use the `mail-user-agent' may | |
2321 | install a hook function temporarily on this hook variable. | |
2322 | If HOOKVAR is nil, `mail-send-hook' is used. | |
2323 | ||
2324 | The properties used on SYMBOL are `composefunc', `sendfunc', | |
2325 | `abortfunc', and `hookvar'." | |
2326 | (put symbol 'composefunc composefunc) | |
2327 | (put symbol 'sendfunc sendfunc) | |
2328 | (put symbol 'abortfunc (or abortfunc 'kill-buffer)) | |
2329 | (put symbol 'hookvar (or hookvar 'mail-send-hook))) | |
2330 | ||
630cc463 | 2331 | ;;; subr.el ends here |