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c88ab9ce | 1 | ;;; subr.el --- basic lisp subroutines for Emacs |
630cc463 | 2 | |
73b0cd50 | 3 | ;; Copyright (C) 1985-1986, 1992, 1994-1995, 1999-2011 |
3226d6ca | 4 | ;; Free Software Foundation, Inc. |
be9b65ac | 5 | |
30764597 PJ |
6 | ;; Maintainer: FSF |
7 | ;; Keywords: internal | |
bd78fa1d | 8 | ;; Package: emacs |
30764597 | 9 | |
be9b65ac DL |
10 | ;; This file is part of GNU Emacs. |
11 | ||
eb3fa2cf | 12 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
be9b65ac | 13 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
14 | ;; the Free Software Foundation, either version 3 of the License, or |
15 | ;; (at your option) any later version. | |
be9b65ac DL |
16 | |
17 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;; GNU General Public License for more details. | |
21 | ||
22 | ;; You should have received a copy of the GNU General Public License | |
eb3fa2cf | 23 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
be9b65ac | 24 | |
60370d40 PJ |
25 | ;;; Commentary: |
26 | ||
630cc463 | 27 | ;;; Code: |
d0fc47ed | 28 | |
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 | 38 | |
708bb6f8 RS |
39 | (defmacro declare-function (fn file &optional arglist fileonly) |
40 | "Tell the byte-compiler that function FN is defined, in FILE. | |
41 | Optional ARGLIST is the argument list used by the function. The | |
42 | FILE argument is not used by the byte-compiler, but by the | |
43 | `check-declare' package, which checks that FILE contains a | |
44 | definition for FN. ARGLIST is used by both the byte-compiler and | |
45 | `check-declare' to check for consistency. | |
46 | ||
47 | FILE can be either a Lisp file (in which case the \".el\" | |
48 | extension is optional), or a C file. C files are expanded | |
49 | relative to the Emacs \"src/\" directory. Lisp files are | |
50 | searched for using `locate-library', and if that fails they are | |
51 | expanded relative to the location of the file containing the | |
52 | declaration. A FILE with an \"ext:\" prefix is an external file. | |
53 | `check-declare' will check such files if they are found, and skip | |
54 | them without error if they are not. | |
55 | ||
56 | FILEONLY non-nil means that `check-declare' will only check that | |
57 | FILE exists, not that it defines FN. This is intended for | |
58 | function-definitions that `check-declare' does not recognize, e.g. | |
59 | `defstruct'. | |
60 | ||
61 | To specify a value for FILEONLY without passing an argument list, | |
3fa173b4 | 62 | set ARGLIST to t. This is necessary because nil means an |
708bb6f8 RS |
63 | empty argument list, rather than an unspecified one. |
64 | ||
65 | Note that for the purposes of `check-declare', this statement | |
a4d2c321 | 66 | must be the first non-whitespace on a line. |
708bb6f8 | 67 | |
83031738 | 68 | For more information, see Info node `(elisp)Declaring Functions'." |
708bb6f8 RS |
69 | ;; Does nothing - byte-compile-declare-function does the work. |
70 | nil) | |
e224699a | 71 | |
2c642c03 | 72 | \f |
c4f484f2 | 73 | ;;;; Basic Lisp macros. |
9a5336ae | 74 | |
0764e16f SM |
75 | (defalias 'not 'null) |
76 | ||
6b61353c | 77 | (defmacro noreturn (form) |
70c6db6c LT |
78 | "Evaluate FORM, expecting it not to return. |
79 | If FORM does return, signal an error." | |
6b61353c KH |
80 | `(prog1 ,form |
81 | (error "Form marked with `noreturn' did return"))) | |
82 | ||
83 | (defmacro 1value (form) | |
70c6db6c LT |
84 | "Evaluate FORM, expecting a constant return value. |
85 | This is the global do-nothing version. There is also `testcover-1value' | |
86 | that complains if FORM ever does return differing values." | |
6b61353c KH |
87 | form) |
88 | ||
8285ccd2 RS |
89 | (defmacro def-edebug-spec (symbol spec) |
90 | "Set the `edebug-form-spec' property of SYMBOL according to SPEC. | |
e32721f5 GM |
91 | Both SYMBOL and SPEC are unevaluated. The SPEC can be: |
92 | 0 (instrument no arguments); t (instrument all arguments); | |
93 | a symbol (naming a function with an Edebug specification); or a list. | |
94 | The elements of the list describe the argument types; see | |
95 | \(info \"(elisp)Specification List\") for details." | |
8285ccd2 RS |
96 | `(put (quote ,symbol) 'edebug-form-spec (quote ,spec))) |
97 | ||
9a5336ae JB |
98 | (defmacro lambda (&rest cdr) |
99 | "Return a lambda expression. | |
100 | A call of the form (lambda ARGS DOCSTRING INTERACTIVE BODY) is | |
101 | self-quoting; the result of evaluating the lambda expression is the | |
102 | expression itself. The lambda expression may then be treated as a | |
bec0d7f9 | 103 | function, i.e., stored as the function value of a symbol, passed to |
265b3f2a | 104 | `funcall' or `mapcar', etc. |
bec0d7f9 | 105 | |
9a5336ae | 106 | ARGS should take the same form as an argument list for a `defun'. |
8fd68088 RS |
107 | DOCSTRING is an optional documentation string. |
108 | If present, it should describe how to call the function. | |
109 | But documentation strings are usually not useful in nameless functions. | |
9a5336ae JB |
110 | INTERACTIVE should be a call to the function `interactive', which see. |
111 | It may also be omitted. | |
a478f3e1 JB |
112 | BODY should be a list of Lisp expressions. |
113 | ||
114 | \(fn ARGS [DOCSTRING] [INTERACTIVE] BODY)" | |
9a5336ae JB |
115 | ;; Note that this definition should not use backquotes; subr.el should not |
116 | ;; depend on backquote.el. | |
117 | (list 'function (cons 'lambda cdr))) | |
118 | ||
a69c67e8 CY |
119 | (if (null (featurep 'cl)) |
120 | (progn | |
354f0faf SM |
121 | ;; If we reload subr.el after having loaded CL, be careful not to |
122 | ;; overwrite CL's extended definition of `dolist', `dotimes', | |
123 | ;; `declare', `push' and `pop'. | |
1be152fc | 124 | (defmacro push (newelt listname) |
fa65505b | 125 | "Add NEWELT to the list stored in the symbol LISTNAME. |
1be152fc | 126 | This is equivalent to (setq LISTNAME (cons NEWELT LISTNAME)). |
d270117a | 127 | LISTNAME must be a symbol." |
f30e0cd8 | 128 | (declare (debug (form sexp))) |
22d85d00 | 129 | (list 'setq listname |
354f0faf | 130 | (list 'cons newelt listname))) |
d270117a RS |
131 | |
132 | (defmacro pop (listname) | |
133 | "Return the first element of LISTNAME's value, and remove it from the list. | |
134 | LISTNAME must be a symbol whose value is a list. | |
135 | If the value is nil, `pop' returns nil but does not actually | |
136 | change the list." | |
f30e0cd8 | 137 | (declare (debug (sexp))) |
54993fa4 | 138 | (list 'car |
354f0faf | 139 | (list 'prog1 listname |
a69c67e8 CY |
140 | (list 'setq listname (list 'cdr listname))))) |
141 | )) | |
d270117a | 142 | |
debff3c3 | 143 | (defmacro when (cond &rest body) |
7f67eea0 KS |
144 | "If COND yields non-nil, do BODY, else return nil. |
145 | When COND yields non-nil, eval BODY forms sequentially and return | |
146 | value of last one, or nil if there are none. | |
147 | ||
ebc3ae14 | 148 | \(fn COND BODY...)" |
d47f7515 | 149 | (declare (indent 1) (debug t)) |
debff3c3 | 150 | (list 'if cond (cons 'progn body))) |
9a5336ae | 151 | |
debff3c3 | 152 | (defmacro unless (cond &rest body) |
7f67eea0 KS |
153 | "If COND yields nil, do BODY, else return nil. |
154 | When COND yields nil, eval BODY forms sequentially and return | |
155 | value of last one, or nil if there are none. | |
156 | ||
ebc3ae14 | 157 | \(fn COND BODY...)" |
d47f7515 | 158 | (declare (indent 1) (debug t)) |
debff3c3 | 159 | (cons 'if (cons cond (cons nil body)))) |
d370591d | 160 | |
a69c67e8 CY |
161 | (if (null (featurep 'cl)) |
162 | (progn | |
354f0faf SM |
163 | ;; If we reload subr.el after having loaded CL, be careful not to |
164 | ;; overwrite CL's extended definition of `dolist', `dotimes', | |
165 | ;; `declare', `push' and `pop'. | |
01d16e16 RS |
166 | (defvar --dolist-tail-- nil |
167 | "Temporary variable used in `dolist' expansion.") | |
168 | ||
a0b0756a | 169 | (defmacro dolist (spec &rest body) |
d47f7515 | 170 | "Loop over a list. |
a0b0756a | 171 | Evaluate BODY with VAR bound to each car from LIST, in turn. |
d47f7515 SM |
172 | Then evaluate RESULT to get return value, default nil. |
173 | ||
d775d486 | 174 | \(fn (VAR LIST [RESULT]) BODY...)" |
d47f7515 | 175 | (declare (indent 1) (debug ((symbolp form &optional form) body))) |
01d16e16 RS |
176 | ;; It would be cleaner to create an uninterned symbol, |
177 | ;; but that uses a lot more space when many functions in many files | |
178 | ;; use dolist. | |
179 | (let ((temp '--dolist-tail--)) | |
d47f7515 SM |
180 | `(let ((,temp ,(nth 1 spec)) |
181 | ,(car spec)) | |
182 | (while ,temp | |
183 | (setq ,(car spec) (car ,temp)) | |
01d16e16 RS |
184 | ,@body |
185 | (setq ,temp (cdr ,temp))) | |
d47f7515 SM |
186 | ,@(if (cdr (cdr spec)) |
187 | `((setq ,(car spec) nil) ,@(cdr (cdr spec))))))) | |
a0b0756a | 188 | |
01d16e16 RS |
189 | (defvar --dotimes-limit-- nil |
190 | "Temporary variable used in `dotimes' expansion.") | |
191 | ||
a0b0756a | 192 | (defmacro dotimes (spec &rest body) |
d47f7515 | 193 | "Loop a certain number of times. |
a0b0756a RS |
194 | Evaluate BODY with VAR bound to successive integers running from 0, |
195 | inclusive, to COUNT, exclusive. Then evaluate RESULT to get | |
d47f7515 SM |
196 | the return value (nil if RESULT is omitted). |
197 | ||
d775d486 | 198 | \(fn (VAR COUNT [RESULT]) BODY...)" |
d47f7515 | 199 | (declare (indent 1) (debug dolist)) |
01d16e16 RS |
200 | ;; It would be cleaner to create an uninterned symbol, |
201 | ;; but that uses a lot more space when many functions in many files | |
202 | ;; use dotimes. | |
203 | (let ((temp '--dotimes-limit--) | |
d47f7515 SM |
204 | (start 0) |
205 | (end (nth 1 spec))) | |
206 | `(let ((,temp ,end) | |
207 | (,(car spec) ,start)) | |
208 | (while (< ,(car spec) ,temp) | |
209 | ,@body | |
210 | (setq ,(car spec) (1+ ,(car spec)))) | |
211 | ,@(cdr (cdr spec))))) | |
a0b0756a | 212 | |
6b61353c KH |
213 | (defmacro declare (&rest specs) |
214 | "Do not evaluate any arguments and return nil. | |
215 | Treated as a declaration when used at the right place in a | |
a478f3e1 | 216 | `defmacro' form. \(See Info anchor `(elisp)Definition of declare'.)" |
a69c67e8 CY |
217 | nil) |
218 | )) | |
6b5de136 GM |
219 | |
220 | (defmacro ignore-errors (&rest body) | |
221 | "Execute BODY; if an error occurs, return nil. | |
222 | Otherwise, return result of last form in BODY." | |
7467d0a8 | 223 | (declare (debug t) (indent 0)) |
6b5de136 | 224 | `(condition-case nil (progn ,@body) (error nil))) |
c4f484f2 RS |
225 | \f |
226 | ;;;; Basic Lisp functions. | |
227 | ||
228 | (defun ignore (&rest ignore) | |
229 | "Do nothing and return nil. | |
230 | This function accepts any number of arguments, but ignores them." | |
231 | (interactive) | |
232 | nil) | |
233 | ||
fd6c5134 | 234 | ;; Signal a compile-error if the first arg is missing. |
c4f484f2 RS |
235 | (defun error (&rest args) |
236 | "Signal an error, making error message by passing all args to `format'. | |
237 | In Emacs, the convention is that error messages start with a capital | |
238 | letter but *do not* end with a period. Please follow this convention | |
fd6c5134 | 239 | for the sake of consistency." |
c4f484f2 RS |
240 | (while t |
241 | (signal 'error (list (apply 'format args))))) | |
f3a30a50 | 242 | (set-advertised-calling-convention 'error '(string &rest args) "23.1") |
c4f484f2 RS |
243 | |
244 | ;; We put this here instead of in frame.el so that it's defined even on | |
245 | ;; systems where frame.el isn't loaded. | |
246 | (defun frame-configuration-p (object) | |
247 | "Return non-nil if OBJECT seems to be a frame configuration. | |
248 | Any list whose car is `frame-configuration' is assumed to be a frame | |
249 | configuration." | |
250 | (and (consp object) | |
251 | (eq (car object) 'frame-configuration))) | |
252 | ||
253 | (defun functionp (object) | |
fc944cd4 | 254 | "Non-nil if OBJECT is a function." |
c4f484f2 RS |
255 | (or (and (symbolp object) (fboundp object) |
256 | (condition-case nil | |
257 | (setq object (indirect-function object)) | |
258 | (error nil)) | |
259 | (eq (car-safe object) 'autoload) | |
260 | (not (car-safe (cdr-safe (cdr-safe (cdr-safe (cdr-safe object))))))) | |
fc944cd4 SM |
261 | (and (subrp object) |
262 | ;; Filter out special forms. | |
263 | (not (eq 'unevalled (cdr (subr-arity object))))) | |
264 | (byte-code-function-p object) | |
c4f484f2 | 265 | (eq (car-safe object) 'lambda))) |
c4f484f2 RS |
266 | \f |
267 | ;;;; List functions. | |
6b61353c | 268 | |
d370591d RS |
269 | (defsubst caar (x) |
270 | "Return the car of the car of X." | |
271 | (car (car x))) | |
272 | ||
273 | (defsubst cadr (x) | |
274 | "Return the car of the cdr of X." | |
275 | (car (cdr x))) | |
276 | ||
277 | (defsubst cdar (x) | |
278 | "Return the cdr of the car of X." | |
279 | (cdr (car x))) | |
280 | ||
281 | (defsubst cddr (x) | |
282 | "Return the cdr of the cdr of X." | |
283 | (cdr (cdr x))) | |
e8c32c99 | 284 | |
a478f3e1 JB |
285 | (defun last (list &optional n) |
286 | "Return the last link of LIST. Its car is the last element. | |
287 | If LIST is nil, return nil. | |
288 | If N is non-nil, return the Nth-to-last link of LIST. | |
289 | If N is bigger than the length of LIST, return LIST." | |
369fba5f | 290 | (if n |
10e4702a | 291 | (and (>= n 0) |
88f427d5 | 292 | (let ((m (safe-length list))) |
35744400 IS |
293 | (if (< n m) (nthcdr (- m n) list) list))) |
294 | (and list | |
88f427d5 | 295 | (nthcdr (1- (safe-length list)) list)))) |
526d204e | 296 | |
a478f3e1 | 297 | (defun butlast (list &optional n) |
a3111ae4 | 298 | "Return a copy of LIST with the last N elements removed." |
a478f3e1 JB |
299 | (if (and n (<= n 0)) list |
300 | (nbutlast (copy-sequence list) n))) | |
1c1c65de | 301 | |
a478f3e1 | 302 | (defun nbutlast (list &optional n) |
1c1c65de | 303 | "Modifies LIST to remove the last N elements." |
a478f3e1 | 304 | (let ((m (length list))) |
1c1c65de KH |
305 | (or n (setq n 1)) |
306 | (and (< n m) | |
307 | (progn | |
a478f3e1 JB |
308 | (if (> n 0) (setcdr (nthcdr (- (1- m) n) list) nil)) |
309 | list)))) | |
1c1c65de | 310 | |
6b61353c KH |
311 | (defun delete-dups (list) |
312 | "Destructively remove `equal' duplicates from LIST. | |
313 | Store the result in LIST and return it. LIST must be a proper list. | |
314 | Of several `equal' occurrences of an element in LIST, the first | |
315 | one is kept." | |
316 | (let ((tail list)) | |
317 | (while tail | |
318 | (setcdr tail (delete (car tail) (cdr tail))) | |
319 | (setq tail (cdr tail)))) | |
320 | list) | |
321 | ||
0ed2c9b6 | 322 | (defun number-sequence (from &optional to inc) |
abd9177a | 323 | "Return a sequence of numbers from FROM to TO (both inclusive) as a list. |
6b61353c KH |
324 | INC is the increment used between numbers in the sequence and defaults to 1. |
325 | So, the Nth element of the list is \(+ FROM \(* N INC)) where N counts from | |
326 | zero. TO is only included if there is an N for which TO = FROM + N * INC. | |
327 | If TO is nil or numerically equal to FROM, return \(FROM). | |
328 | If INC is positive and TO is less than FROM, or INC is negative | |
329 | and TO is larger than FROM, return nil. | |
330 | If INC is zero and TO is neither nil nor numerically equal to | |
331 | FROM, signal an error. | |
332 | ||
333 | This function is primarily designed for integer arguments. | |
334 | Nevertheless, FROM, TO and INC can be integer or float. However, | |
335 | floating point arithmetic is inexact. For instance, depending on | |
336 | the machine, it may quite well happen that | |
337 | \(number-sequence 0.4 0.6 0.2) returns the one element list \(0.4), | |
338 | whereas \(number-sequence 0.4 0.8 0.2) returns a list with three | |
339 | elements. Thus, if some of the arguments are floats and one wants | |
340 | to make sure that TO is included, one may have to explicitly write | |
341 | TO as \(+ FROM \(* N INC)) or use a variable whose value was | |
342 | computed with this exact expression. Alternatively, you can, | |
343 | of course, also replace TO with a slightly larger value | |
344 | \(or a slightly more negative value if INC is negative)." | |
345 | (if (or (not to) (= from to)) | |
0ed2c9b6 VJL |
346 | (list from) |
347 | (or inc (setq inc 1)) | |
6b61353c KH |
348 | (when (zerop inc) (error "The increment can not be zero")) |
349 | (let (seq (n 0) (next from)) | |
350 | (if (> inc 0) | |
351 | (while (<= next to) | |
352 | (setq seq (cons next seq) | |
353 | n (1+ n) | |
354 | next (+ from (* n inc)))) | |
355 | (while (>= next to) | |
356 | (setq seq (cons next seq) | |
357 | n (1+ n) | |
358 | next (+ from (* n inc))))) | |
0ed2c9b6 | 359 | (nreverse seq)))) |
abd9177a | 360 | |
a176c9eb CW |
361 | (defun copy-tree (tree &optional vecp) |
362 | "Make a copy of TREE. | |
363 | If TREE is a cons cell, this recursively copies both its car and its cdr. | |
cfebd4db | 364 | Contrast to `copy-sequence', which copies only along the cdrs. With second |
a176c9eb CW |
365 | argument VECP, this copies vectors as well as conses." |
366 | (if (consp tree) | |
cfebd4db RS |
367 | (let (result) |
368 | (while (consp tree) | |
369 | (let ((newcar (car tree))) | |
370 | (if (or (consp (car tree)) (and vecp (vectorp (car tree)))) | |
371 | (setq newcar (copy-tree (car tree) vecp))) | |
372 | (push newcar result)) | |
373 | (setq tree (cdr tree))) | |
68b08950 | 374 | (nconc (nreverse result) tree)) |
a176c9eb CW |
375 | (if (and vecp (vectorp tree)) |
376 | (let ((i (length (setq tree (copy-sequence tree))))) | |
377 | (while (>= (setq i (1- i)) 0) | |
cfebd4db RS |
378 | (aset tree i (copy-tree (aref tree i) vecp))) |
379 | tree) | |
380 | tree))) | |
c4f484f2 RS |
381 | \f |
382 | ;;;; Various list-search functions. | |
a176c9eb | 383 | |
8a288450 RS |
384 | (defun assoc-default (key alist &optional test default) |
385 | "Find object KEY in a pseudo-alist ALIST. | |
753bc4f6 CY |
386 | ALIST is a list of conses or objects. Each element |
387 | (or the element's car, if it is a cons) is compared with KEY by | |
388 | calling TEST, with two arguments: (i) the element or its car, | |
389 | and (ii) KEY. | |
390 | If that is non-nil, the element matches; then `assoc-default' | |
391 | returns the element's cdr, if it is a cons, or DEFAULT if the | |
392 | element is not a cons. | |
8a288450 RS |
393 | |
394 | If no element matches, the value is nil. | |
395 | If TEST is omitted or nil, `equal' is used." | |
396 | (let (found (tail alist) value) | |
397 | (while (and tail (not found)) | |
398 | (let ((elt (car tail))) | |
399 | (when (funcall (or test 'equal) (if (consp elt) (car elt) elt) key) | |
400 | (setq found t value (if (consp elt) (cdr elt) default)))) | |
401 | (setq tail (cdr tail))) | |
402 | value)) | |
98aae5f6 | 403 | |
2b69ccfd | 404 | (make-obsolete 'assoc-ignore-case 'assoc-string "22.1") |
98aae5f6 KH |
405 | (defun assoc-ignore-case (key alist) |
406 | "Like `assoc', but ignores differences in case and text representation. | |
407 | KEY must be a string. Upper-case and lower-case letters are treated as equal. | |
408 | Unibyte strings are converted to multibyte for comparison." | |
6b61353c | 409 | (assoc-string key alist t)) |
98aae5f6 | 410 | |
2b69ccfd | 411 | (make-obsolete 'assoc-ignore-representation 'assoc-string "22.1") |
98aae5f6 KH |
412 | (defun assoc-ignore-representation (key alist) |
413 | "Like `assoc', but ignores differences in text representation. | |
264ef586 | 414 | KEY must be a string. |
98aae5f6 | 415 | Unibyte strings are converted to multibyte for comparison." |
6b61353c | 416 | (assoc-string key alist nil)) |
cbbc3205 GM |
417 | |
418 | (defun member-ignore-case (elt list) | |
5612fd08 | 419 | "Like `member', but ignore differences in case and text representation. |
cbbc3205 | 420 | ELT must be a string. Upper-case and lower-case letters are treated as equal. |
d86a3084 RS |
421 | Unibyte strings are converted to multibyte for comparison. |
422 | Non-strings in LIST are ignored." | |
423 | (while (and list | |
424 | (not (and (stringp (car list)) | |
425 | (eq t (compare-strings elt 0 nil (car list) 0 nil t))))) | |
242c13e8 MB |
426 | (setq list (cdr list))) |
427 | list) | |
cbbc3205 | 428 | |
c4f484f2 RS |
429 | (defun assq-delete-all (key alist) |
430 | "Delete from ALIST all elements whose car is `eq' to KEY. | |
431 | Return the modified alist. | |
432 | Elements of ALIST that are not conses are ignored." | |
433 | (while (and (consp (car alist)) | |
434 | (eq (car (car alist)) key)) | |
435 | (setq alist (cdr alist))) | |
436 | (let ((tail alist) tail-cdr) | |
437 | (while (setq tail-cdr (cdr tail)) | |
438 | (if (and (consp (car tail-cdr)) | |
439 | (eq (car (car tail-cdr)) key)) | |
440 | (setcdr tail (cdr tail-cdr)) | |
441 | (setq tail tail-cdr)))) | |
442 | alist) | |
443 | ||
444 | (defun rassq-delete-all (value alist) | |
445 | "Delete from ALIST all elements whose cdr is `eq' to VALUE. | |
446 | Return the modified alist. | |
447 | Elements of ALIST that are not conses are ignored." | |
448 | (while (and (consp (car alist)) | |
449 | (eq (cdr (car alist)) value)) | |
450 | (setq alist (cdr alist))) | |
451 | (let ((tail alist) tail-cdr) | |
452 | (while (setq tail-cdr (cdr tail)) | |
453 | (if (and (consp (car tail-cdr)) | |
454 | (eq (cdr (car tail-cdr)) value)) | |
455 | (setcdr tail (cdr tail-cdr)) | |
456 | (setq tail tail-cdr)))) | |
457 | alist) | |
458 | ||
459 | (defun remove (elt seq) | |
460 | "Return a copy of SEQ with all occurrences of ELT removed. | |
461 | SEQ must be a list, vector, or string. The comparison is done with `equal'." | |
462 | (if (nlistp seq) | |
463 | ;; If SEQ isn't a list, there's no need to copy SEQ because | |
464 | ;; `delete' will return a new object. | |
465 | (delete elt seq) | |
466 | (delete elt (copy-sequence seq)))) | |
467 | ||
468 | (defun remq (elt list) | |
469 | "Return LIST with all occurrences of ELT removed. | |
470 | The comparison is done with `eq'. Contrary to `delq', this does not use | |
471 | side-effects, and the argument LIST is not modified." | |
472 | (if (memq elt list) | |
473 | (delq elt (copy-sequence list)) | |
474 | list)) | |
9a5336ae | 475 | \f |
9a5336ae | 476 | ;;;; Keymap support. |
be9b65ac | 477 | |
c4f484f2 RS |
478 | (defmacro kbd (keys) |
479 | "Convert KEYS to the internal Emacs key representation. | |
480 | KEYS should be a string constant in the format used for | |
481 | saving keyboard macros (see `edmacro-mode')." | |
482 | (read-kbd-macro keys)) | |
483 | ||
be9b65ac | 484 | (defun undefined () |
3fa173b4 | 485 | "Beep to tell the user this binding is undefined." |
be9b65ac DL |
486 | (interactive) |
487 | (ding)) | |
488 | ||
c4f484f2 RS |
489 | ;; Prevent the \{...} documentation construct |
490 | ;; from mentioning keys that run this command. | |
be9b65ac DL |
491 | (put 'undefined 'suppress-keymap t) |
492 | ||
493 | (defun suppress-keymap (map &optional nodigits) | |
494 | "Make MAP override all normally self-inserting keys to be undefined. | |
495 | Normally, as an exception, digits and minus-sign are set to make prefix args, | |
496 | but optional second arg NODIGITS non-nil treats them like other chars." | |
098ba983 | 497 | (define-key map [remap self-insert-command] 'undefined) |
be9b65ac DL |
498 | (or nodigits |
499 | (let (loop) | |
500 | (define-key map "-" 'negative-argument) | |
501 | ;; Make plain numbers do numeric args. | |
502 | (setq loop ?0) | |
503 | (while (<= loop ?9) | |
504 | (define-key map (char-to-string loop) 'digit-argument) | |
505 | (setq loop (1+ loop)))))) | |
506 | ||
4ced66fd | 507 | (defun define-key-after (keymap key definition &optional after) |
4434d61b RS |
508 | "Add binding in KEYMAP for KEY => DEFINITION, right after AFTER's binding. |
509 | This is like `define-key' except that the binding for KEY is placed | |
510 | just after the binding for the event AFTER, instead of at the beginning | |
c34a9d34 RS |
511 | of the map. Note that AFTER must be an event type (like KEY), NOT a command |
512 | \(like DEFINITION). | |
513 | ||
4ced66fd | 514 | If AFTER is t or omitted, the new binding goes at the end of the keymap. |
08b1f8a1 | 515 | AFTER should be a single event type--a symbol or a character, not a sequence. |
c34a9d34 | 516 | |
4ced66fd | 517 | Bindings are always added before any inherited map. |
c34a9d34 | 518 | |
4ced66fd DL |
519 | The order of bindings in a keymap matters when it is used as a menu." |
520 | (unless after (setq after t)) | |
4434d61b RS |
521 | (or (keymapp keymap) |
522 | (signal 'wrong-type-argument (list 'keymapp keymap))) | |
08b1f8a1 GM |
523 | (setq key |
524 | (if (<= (length key) 1) (aref key 0) | |
525 | (setq keymap (lookup-key keymap | |
526 | (apply 'vector | |
527 | (butlast (mapcar 'identity key))))) | |
528 | (aref key (1- (length key))))) | |
529 | (let ((tail keymap) done inserted) | |
4434d61b RS |
530 | (while (and (not done) tail) |
531 | ;; Delete any earlier bindings for the same key. | |
08b1f8a1 | 532 | (if (eq (car-safe (car (cdr tail))) key) |
4434d61b | 533 | (setcdr tail (cdr (cdr tail)))) |
08b1f8a1 GM |
534 | ;; If we hit an included map, go down that one. |
535 | (if (keymapp (car tail)) (setq tail (car tail))) | |
4434d61b RS |
536 | ;; When we reach AFTER's binding, insert the new binding after. |
537 | ;; If we reach an inherited keymap, insert just before that. | |
113d28a8 | 538 | ;; If we reach the end of this keymap, insert at the end. |
c34a9d34 RS |
539 | (if (or (and (eq (car-safe (car tail)) after) |
540 | (not (eq after t))) | |
113d28a8 RS |
541 | (eq (car (cdr tail)) 'keymap) |
542 | (null (cdr tail))) | |
4434d61b | 543 | (progn |
113d28a8 RS |
544 | ;; Stop the scan only if we find a parent keymap. |
545 | ;; Keep going past the inserted element | |
546 | ;; so we can delete any duplications that come later. | |
547 | (if (eq (car (cdr tail)) 'keymap) | |
548 | (setq done t)) | |
549 | ;; Don't insert more than once. | |
550 | (or inserted | |
08b1f8a1 | 551 | (setcdr tail (cons (cons key definition) (cdr tail)))) |
113d28a8 | 552 | (setq inserted t))) |
4434d61b RS |
553 | (setq tail (cdr tail))))) |
554 | ||
a10cca6c | 555 | (defun map-keymap-sorted (function keymap) |
14694a59 RS |
556 | "Implement `map-keymap' with sorting. |
557 | Don't call this function; it is for internal use only." | |
a10cca6c SM |
558 | (let (list) |
559 | (map-keymap (lambda (a b) (push (cons a b) list)) | |
560 | keymap) | |
561 | (setq list (sort list | |
562 | (lambda (a b) | |
563 | (setq a (car a) b (car b)) | |
564 | (if (integerp a) | |
565 | (if (integerp b) (< a b) | |
566 | t) | |
567 | (if (integerp b) t | |
568 | ;; string< also accepts symbols. | |
569 | (string< a b)))))) | |
570 | (dolist (p list) | |
571 | (funcall function (car p) (cdr p))))) | |
51fa3961 | 572 | |
00f7c5ed SM |
573 | (defun keymap-canonicalize (map) |
574 | "Return an equivalent keymap, without inheritance." | |
575 | (let ((bindings ()) | |
c099a588 AS |
576 | (ranges ()) |
577 | (prompt (keymap-prompt map))) | |
00f7c5ed SM |
578 | (while (keymapp map) |
579 | (setq map (map-keymap-internal | |
580 | (lambda (key item) | |
581 | (if (consp key) | |
582 | ;; Treat char-ranges specially. | |
583 | (push (cons key item) ranges) | |
584 | (push (cons key item) bindings))) | |
585 | map))) | |
c099a588 | 586 | (setq map (funcall (if ranges 'make-keymap 'make-sparse-keymap) prompt)) |
00f7c5ed SM |
587 | (dolist (binding ranges) |
588 | ;; Treat char-ranges specially. | |
64981d1a | 589 | (define-key map (vector (car binding)) (cdr binding))) |
00f7c5ed SM |
590 | (dolist (binding (prog1 bindings (setq bindings ()))) |
591 | (let* ((key (car binding)) | |
592 | (item (cdr binding)) | |
593 | (oldbind (assq key bindings))) | |
594 | ;; Newer bindings override older. | |
595 | (if oldbind (setq bindings (delq oldbind bindings))) | |
596 | (when item ;nil bindings just hide older ones. | |
597 | (push binding bindings)))) | |
598 | (nconc map bindings))) | |
599 | ||
8bed5e3d RS |
600 | (put 'keyboard-translate-table 'char-table-extra-slots 0) |
601 | ||
9a5336ae JB |
602 | (defun keyboard-translate (from to) |
603 | "Translate character FROM to TO at a low level. | |
604 | This function creates a `keyboard-translate-table' if necessary | |
605 | and then modifies one entry in it." | |
8bed5e3d RS |
606 | (or (char-table-p keyboard-translate-table) |
607 | (setq keyboard-translate-table | |
608 | (make-char-table 'keyboard-translate-table nil))) | |
9a5336ae | 609 | (aset keyboard-translate-table from to)) |
9a5336ae | 610 | \f |
c4f484f2 | 611 | ;;;; Key binding commands. |
9a5336ae | 612 | |
c4f484f2 RS |
613 | (defun global-set-key (key command) |
614 | "Give KEY a global binding as COMMAND. | |
615 | COMMAND is the command definition to use; usually it is | |
616 | a symbol naming an interactively-callable function. | |
617 | KEY is a key sequence; noninteractively, it is a string or vector | |
618 | of characters or event types, and non-ASCII characters with codes | |
619 | above 127 (such as ISO Latin-1) can be included if you use a vector. | |
9a5336ae | 620 | |
c4f484f2 RS |
621 | Note that if KEY has a local binding in the current buffer, |
622 | that local binding will continue to shadow any global binding | |
623 | that you make with this function." | |
624 | (interactive "KSet key globally: \nCSet key %s to command: ") | |
625 | (or (vectorp key) (stringp key) | |
626 | (signal 'wrong-type-argument (list 'arrayp key))) | |
627 | (define-key (current-global-map) key command)) | |
9a5336ae | 628 | |
c4f484f2 RS |
629 | (defun local-set-key (key command) |
630 | "Give KEY a local binding as COMMAND. | |
631 | COMMAND is the command definition to use; usually it is | |
632 | a symbol naming an interactively-callable function. | |
633 | KEY is a key sequence; noninteractively, it is a string or vector | |
634 | of characters or event types, and non-ASCII characters with codes | |
635 | above 127 (such as ISO Latin-1) can be included if you use a vector. | |
9a5336ae | 636 | |
c4f484f2 RS |
637 | The binding goes in the current buffer's local map, |
638 | which in most cases is shared with all other buffers in the same major mode." | |
639 | (interactive "KSet key locally: \nCSet key %s locally to command: ") | |
640 | (let ((map (current-local-map))) | |
641 | (or map | |
642 | (use-local-map (setq map (make-sparse-keymap)))) | |
643 | (or (vectorp key) (stringp key) | |
644 | (signal 'wrong-type-argument (list 'arrayp key))) | |
645 | (define-key map key command))) | |
9a5336ae | 646 | |
c4f484f2 RS |
647 | (defun global-unset-key (key) |
648 | "Remove global binding of KEY. | |
649 | KEY is a string or vector representing a sequence of keystrokes." | |
650 | (interactive "kUnset key globally: ") | |
651 | (global-set-key key nil)) | |
9a5336ae | 652 | |
c4f484f2 RS |
653 | (defun local-unset-key (key) |
654 | "Remove local binding of KEY. | |
655 | KEY is a string or vector representing a sequence of keystrokes." | |
656 | (interactive "kUnset key locally: ") | |
657 | (if (current-local-map) | |
658 | (local-set-key key nil)) | |
659 | nil) | |
660 | \f | |
661 | ;;;; substitute-key-definition and its subroutines. | |
662 | ||
663 | (defvar key-substitution-in-progress nil | |
c8227332 | 664 | "Used internally by `substitute-key-definition'.") |
c4f484f2 RS |
665 | |
666 | (defun substitute-key-definition (olddef newdef keymap &optional oldmap prefix) | |
667 | "Replace OLDDEF with NEWDEF for any keys in KEYMAP now defined as OLDDEF. | |
668 | In other words, OLDDEF is replaced with NEWDEF where ever it appears. | |
669 | Alternatively, if optional fourth argument OLDMAP is specified, we redefine | |
670 | in KEYMAP as NEWDEF those keys which are defined as OLDDEF in OLDMAP. | |
671 | ||
fda11e85 RS |
672 | If you don't specify OLDMAP, you can usually get the same results |
673 | in a cleaner way with command remapping, like this: | |
50d16788 JB |
674 | \(define-key KEYMAP [remap OLDDEF] NEWDEF) |
675 | \n(fn OLDDEF NEWDEF KEYMAP &optional OLDMAP)" | |
c4f484f2 RS |
676 | ;; Don't document PREFIX in the doc string because we don't want to |
677 | ;; advertise it. It's meant for recursive calls only. Here's its | |
678 | ;; meaning | |
679 | ||
680 | ;; If optional argument PREFIX is specified, it should be a key | |
681 | ;; prefix, a string. Redefined bindings will then be bound to the | |
682 | ;; original key, with PREFIX added at the front. | |
683 | (or prefix (setq prefix "")) | |
684 | (let* ((scan (or oldmap keymap)) | |
685 | (prefix1 (vconcat prefix [nil])) | |
686 | (key-substitution-in-progress | |
687 | (cons scan key-substitution-in-progress))) | |
688 | ;; Scan OLDMAP, finding each char or event-symbol that | |
689 | ;; has any definition, and act on it with hack-key. | |
690 | (map-keymap | |
691 | (lambda (char defn) | |
692 | (aset prefix1 (length prefix) char) | |
693 | (substitute-key-definition-key defn olddef newdef prefix1 keymap)) | |
694 | scan))) | |
695 | ||
696 | (defun substitute-key-definition-key (defn olddef newdef prefix keymap) | |
697 | (let (inner-def skipped menu-item) | |
698 | ;; Find the actual command name within the binding. | |
699 | (if (eq (car-safe defn) 'menu-item) | |
700 | (setq menu-item defn defn (nth 2 defn)) | |
701 | ;; Skip past menu-prompt. | |
702 | (while (stringp (car-safe defn)) | |
703 | (push (pop defn) skipped)) | |
704 | ;; Skip past cached key-equivalence data for menu items. | |
705 | (if (consp (car-safe defn)) | |
706 | (setq defn (cdr defn)))) | |
707 | (if (or (eq defn olddef) | |
708 | ;; Compare with equal if definition is a key sequence. | |
709 | ;; That is useful for operating on function-key-map. | |
710 | (and (or (stringp defn) (vectorp defn)) | |
711 | (equal defn olddef))) | |
712 | (define-key keymap prefix | |
713 | (if menu-item | |
714 | (let ((copy (copy-sequence menu-item))) | |
715 | (setcar (nthcdr 2 copy) newdef) | |
716 | copy) | |
717 | (nconc (nreverse skipped) newdef))) | |
718 | ;; Look past a symbol that names a keymap. | |
719 | (setq inner-def | |
cf25c647 | 720 | (or (indirect-function defn t) defn)) |
c4f484f2 RS |
721 | ;; For nested keymaps, we use `inner-def' rather than `defn' so as to |
722 | ;; avoid autoloading a keymap. This is mostly done to preserve the | |
723 | ;; original non-autoloading behavior of pre-map-keymap times. | |
724 | (if (and (keymapp inner-def) | |
725 | ;; Avoid recursively scanning | |
726 | ;; where KEYMAP does not have a submap. | |
727 | (let ((elt (lookup-key keymap prefix))) | |
728 | (or (null elt) (natnump elt) (keymapp elt))) | |
729 | ;; Avoid recursively rescanning keymap being scanned. | |
730 | (not (memq inner-def key-substitution-in-progress))) | |
731 | ;; If this one isn't being scanned already, scan it now. | |
732 | (substitute-key-definition olddef newdef keymap inner-def prefix))))) | |
9a5336ae JB |
733 | |
734 | \f | |
264ef586 | 735 | ;;;; The global keymap tree. |
9a5336ae | 736 | |
354f0faf SM |
737 | ;; global-map, esc-map, and ctl-x-map have their values set up in |
738 | ;; keymap.c; we just give them docstrings here. | |
9a5336ae JB |
739 | |
740 | (defvar global-map nil | |
741 | "Default global keymap mapping Emacs keyboard input into commands. | |
742 | The value is a keymap which is usually (but not necessarily) Emacs's | |
743 | global map.") | |
744 | ||
745 | (defvar esc-map nil | |
746 | "Default keymap for ESC (meta) commands. | |
747 | The normal global definition of the character ESC indirects to this keymap.") | |
748 | ||
749 | (defvar ctl-x-map nil | |
750 | "Default keymap for C-x commands. | |
751 | The normal global definition of the character C-x indirects to this keymap.") | |
752 | ||
753 | (defvar ctl-x-4-map (make-sparse-keymap) | |
03eeb110 | 754 | "Keymap for subcommands of C-x 4.") |
059184dd | 755 | (defalias 'ctl-x-4-prefix ctl-x-4-map) |
9a5336ae JB |
756 | (define-key ctl-x-map "4" 'ctl-x-4-prefix) |
757 | ||
758 | (defvar ctl-x-5-map (make-sparse-keymap) | |
759 | "Keymap for frame commands.") | |
059184dd | 760 | (defalias 'ctl-x-5-prefix ctl-x-5-map) |
9a5336ae JB |
761 | (define-key ctl-x-map "5" 'ctl-x-5-prefix) |
762 | ||
0f03054a | 763 | \f |
9a5336ae JB |
764 | ;;;; Event manipulation functions. |
765 | ||
03a74b84 | 766 | (defconst listify-key-sequence-1 (logior 128 ?\M-\C-@)) |
114137b8 | 767 | |
cde6d7e3 RS |
768 | (defun listify-key-sequence (key) |
769 | "Convert a key sequence to a list of events." | |
770 | (if (vectorp key) | |
771 | (append key nil) | |
772 | (mapcar (function (lambda (c) | |
773 | (if (> c 127) | |
114137b8 | 774 | (logxor c listify-key-sequence-1) |
cde6d7e3 | 775 | c))) |
d47f7515 | 776 | key))) |
cde6d7e3 | 777 | |
53e5a4e8 RS |
778 | (defsubst eventp (obj) |
779 | "True if the argument is an event object." | |
7a2937ce SM |
780 | (or (and (integerp obj) |
781 | ;; Filter out integers too large to be events. | |
782 | ;; M is the biggest modifier. | |
783 | (zerop (logand obj (lognot (1- (lsh ?\M-\^@ 1))))) | |
327719ee | 784 | (characterp (event-basic-type obj))) |
53e5a4e8 RS |
785 | (and (symbolp obj) |
786 | (get obj 'event-symbol-elements)) | |
787 | (and (consp obj) | |
788 | (symbolp (car obj)) | |
789 | (get (car obj) 'event-symbol-elements)))) | |
790 | ||
791 | (defun event-modifiers (event) | |
a3111ae4 | 792 | "Return a list of symbols representing the modifier keys in event EVENT. |
53e5a4e8 | 793 | The elements of the list may include `meta', `control', |
32295976 | 794 | `shift', `hyper', `super', `alt', `click', `double', `triple', `drag', |
0e91dc92 LT |
795 | and `down'. |
796 | EVENT may be an event or an event type. If EVENT is a symbol | |
797 | that has never been used in an event that has been read as input | |
798 | in the current Emacs session, then this function can return nil, | |
799 | even when EVENT actually has modifiers." | |
53e5a4e8 RS |
800 | (let ((type event)) |
801 | (if (listp type) | |
802 | (setq type (car type))) | |
803 | (if (symbolp type) | |
58da34c7 SM |
804 | ;; Don't read event-symbol-elements directly since we're not |
805 | ;; sure the symbol has already been parsed. | |
806 | (cdr (internal-event-symbol-parse-modifiers type)) | |
5572c97f RS |
807 | (let ((list nil) |
808 | (char (logand type (lognot (logior ?\M-\^@ ?\C-\^@ ?\S-\^@ | |
809 | ?\H-\^@ ?\s-\^@ ?\A-\^@))))) | |
810 | (if (not (zerop (logand type ?\M-\^@))) | |
9166dbf6 | 811 | (push 'meta list)) |
5572c97f RS |
812 | (if (or (not (zerop (logand type ?\C-\^@))) |
813 | (< char 32)) | |
9166dbf6 | 814 | (push 'control list)) |
5572c97f RS |
815 | (if (or (not (zerop (logand type ?\S-\^@))) |
816 | (/= char (downcase char))) | |
9166dbf6 | 817 | (push 'shift list)) |
da16e648 | 818 | (or (zerop (logand type ?\H-\^@)) |
9166dbf6 | 819 | (push 'hyper list)) |
da16e648 | 820 | (or (zerop (logand type ?\s-\^@)) |
9166dbf6 | 821 | (push 'super list)) |
da16e648 | 822 | (or (zerop (logand type ?\A-\^@)) |
9166dbf6 | 823 | (push 'alt list)) |
53e5a4e8 RS |
824 | list)))) |
825 | ||
d63de416 | 826 | (defun event-basic-type (event) |
a3111ae4 | 827 | "Return the basic type of the given event (all modifiers removed). |
0e91dc92 LT |
828 | The value is a printing character (not upper case) or a symbol. |
829 | EVENT may be an event or an event type. If EVENT is a symbol | |
830 | that has never been used in an event that has been read as input | |
831 | in the current Emacs session, then this function may return nil." | |
2b0f4ba5 JB |
832 | (if (consp event) |
833 | (setq event (car event))) | |
d63de416 RS |
834 | (if (symbolp event) |
835 | (car (get event 'event-symbol-elements)) | |
9aca2476 RS |
836 | (let* ((base (logand event (1- ?\A-\^@))) |
837 | (uncontrolled (if (< base 32) (logior base 64) base))) | |
838 | ;; There are some numbers that are invalid characters and | |
839 | ;; cause `downcase' to get an error. | |
840 | (condition-case () | |
841 | (downcase uncontrolled) | |
842 | (error uncontrolled))))) | |
d63de416 | 843 | |
0f03054a RS |
844 | (defsubst mouse-movement-p (object) |
845 | "Return non-nil if OBJECT is a mouse movement event." | |
9166dbf6 | 846 | (eq (car-safe object) 'mouse-movement)) |
0f03054a | 847 | |
5ad4f91c SS |
848 | (defun mouse-event-p (object) |
849 | "Return non-nil if OBJECT is a mouse click event." | |
850 | ;; is this really correct? maybe remove mouse-movement? | |
851 | (memq (event-basic-type object) '(mouse-1 mouse-2 mouse-3 mouse-movement))) | |
852 | ||
0f03054a RS |
853 | (defsubst event-start (event) |
854 | "Return the starting position of EVENT. | |
c88aaf48 CY |
855 | EVENT should be a click, drag, or key press event. |
856 | If it is a key press event, the return value has the form | |
857 | (WINDOW POS (0 . 0) 0) | |
858 | If it is a click or drag event, it has the form | |
6b61353c KH |
859 | (WINDOW AREA-OR-POS (X . Y) TIMESTAMP OBJECT POS (COL . ROW) |
860 | IMAGE (DX . DY) (WIDTH . HEIGHT)) | |
c88aaf48 CY |
861 | The `posn-' functions access elements of such lists. |
862 | For more information, see Info node `(elisp)Click Events'. | |
863 | ||
864 | If EVENT is a mouse or key press or a mouse click, this is the | |
865 | position of the event. If EVENT is a drag, this is the starting | |
866 | position of the drag." | |
5ef6a86d SM |
867 | (if (consp event) (nth 1 event) |
868 | (list (selected-window) (point) '(0 . 0) 0))) | |
0f03054a RS |
869 | |
870 | (defsubst event-end (event) | |
6b61353c KH |
871 | "Return the ending location of EVENT. |
872 | EVENT should be a click, drag, or key press event. | |
c88aaf48 CY |
873 | If EVENT is a key press event, the return value has the form |
874 | (WINDOW POS (0 . 0) 0) | |
875 | If EVENT is a click event, this function is the same as | |
876 | `event-start'. For click and drag events, the return value has | |
877 | the form | |
6b61353c KH |
878 | (WINDOW AREA-OR-POS (X . Y) TIMESTAMP OBJECT POS (COL . ROW) |
879 | IMAGE (DX . DY) (WIDTH . HEIGHT)) | |
c88aaf48 CY |
880 | The `posn-' functions access elements of such lists. |
881 | For more information, see Info node `(elisp)Click Events'. | |
882 | ||
883 | If EVENT is a mouse or key press or a mouse click, this is the | |
884 | position of the event. If EVENT is a drag, this is the starting | |
885 | position of the drag." | |
5ef6a86d SM |
886 | (if (consp event) (nth (if (consp (nth 2 event)) 2 1) event) |
887 | (list (selected-window) (point) '(0 . 0) 0))) | |
0f03054a | 888 | |
32295976 RS |
889 | (defsubst event-click-count (event) |
890 | "Return the multi-click count of EVENT, a click or drag event. | |
891 | The return value is a positive integer." | |
5ef6a86d | 892 | (if (and (consp event) (integerp (nth 2 event))) (nth 2 event) 1)) |
c4f484f2 RS |
893 | \f |
894 | ;;;; Extracting fields of the positions in an event. | |
32295976 | 895 | |
0f03054a RS |
896 | (defsubst posn-window (position) |
897 | "Return the window in POSITION. | |
6b61353c KH |
898 | POSITION should be a list of the form returned by the `event-start' |
899 | and `event-end' functions." | |
0f03054a RS |
900 | (nth 0 position)) |
901 | ||
6b61353c KH |
902 | (defsubst posn-area (position) |
903 | "Return the window area recorded in POSITION, or nil for the text area. | |
904 | POSITION should be a list of the form returned by the `event-start' | |
905 | and `event-end' functions." | |
906 | (let ((area (if (consp (nth 1 position)) | |
907 | (car (nth 1 position)) | |
908 | (nth 1 position)))) | |
909 | (and (symbolp area) area))) | |
910 | ||
0f03054a RS |
911 | (defsubst posn-point (position) |
912 | "Return the buffer location in POSITION. | |
6b61353c KH |
913 | POSITION should be a list of the form returned by the `event-start' |
914 | and `event-end' functions." | |
915 | (or (nth 5 position) | |
916 | (if (consp (nth 1 position)) | |
917 | (car (nth 1 position)) | |
918 | (nth 1 position)))) | |
919 | ||
920 | (defun posn-set-point (position) | |
921 | "Move point to POSITION. | |
922 | Select the corresponding window as well." | |
c8227332 VJL |
923 | (if (not (windowp (posn-window position))) |
924 | (error "Position not in text area of window")) | |
925 | (select-window (posn-window position)) | |
926 | (if (numberp (posn-point position)) | |
927 | (goto-char (posn-point position)))) | |
0f03054a | 928 | |
e55c21be RS |
929 | (defsubst posn-x-y (position) |
930 | "Return the x and y coordinates in POSITION. | |
74194465 CY |
931 | The return value has the form (X . Y), where X and Y are given in |
932 | pixels. POSITION should be a list of the form returned by | |
933 | `event-start' and `event-end'." | |
0f03054a RS |
934 | (nth 2 position)) |
935 | ||
aa360da1 GM |
936 | (declare-function scroll-bar-scale "scroll-bar" (num-denom whole)) |
937 | ||
ed627e08 | 938 | (defun posn-col-row (position) |
6b61353c KH |
939 | "Return the nominal column and row in POSITION, measured in characters. |
940 | The column and row values are approximations calculated from the x | |
941 | and y coordinates in POSITION and the frame's default character width | |
942 | and height. | |
ed627e08 | 943 | For a scroll-bar event, the result column is 0, and the row |
6b61353c KH |
944 | corresponds to the vertical position of the click in the scroll bar. |
945 | POSITION should be a list of the form returned by the `event-start' | |
946 | and `event-end' functions." | |
947 | (let* ((pair (posn-x-y position)) | |
948 | (window (posn-window position)) | |
949 | (area (posn-area position))) | |
950 | (cond | |
951 | ((null window) | |
952 | '(0 . 0)) | |
953 | ((eq area 'vertical-scroll-bar) | |
954 | (cons 0 (scroll-bar-scale pair (1- (window-height window))))) | |
955 | ((eq area 'horizontal-scroll-bar) | |
956 | (cons (scroll-bar-scale pair (window-width window)) 0)) | |
957 | (t | |
958 | (let* ((frame (if (framep window) window (window-frame window))) | |
7beba943 CY |
959 | ;; FIXME: This should take line-spacing properties on |
960 | ;; newlines into account. | |
961 | (spacing (when (display-graphic-p frame) | |
962 | (or (with-current-buffer (window-buffer window) | |
963 | line-spacing) | |
964 | (frame-parameter frame 'line-spacing))))) | |
965 | (cond ((floatp spacing) | |
966 | (setq spacing (truncate (* spacing | |
967 | (frame-char-height frame))))) | |
968 | ((null spacing) | |
969 | (setq spacing 0))) | |
970 | (cons (/ (car pair) (frame-char-width frame)) | |
e68afd74 | 971 | (- (/ (cdr pair) (+ (frame-char-height frame) spacing)) |
11aad4e9 EZ |
972 | (if (null (with-current-buffer (window-buffer window) |
973 | header-line-format)) | |
974 | 0 1)))))))) | |
6b61353c KH |
975 | |
976 | (defun posn-actual-col-row (position) | |
977 | "Return the actual column and row in POSITION, measured in characters. | |
978 | These are the actual row number in the window and character number in that row. | |
979 | Return nil if POSITION does not contain the actual position; in that case | |
980 | `posn-col-row' can be used to get approximate values. | |
981 | POSITION should be a list of the form returned by the `event-start' | |
982 | and `event-end' functions." | |
983 | (nth 6 position)) | |
e55c21be | 984 | |
0f03054a RS |
985 | (defsubst posn-timestamp (position) |
986 | "Return the timestamp of POSITION. | |
6b61353c KH |
987 | POSITION should be a list of the form returned by the `event-start' |
988 | and `event-end' functions." | |
0f03054a | 989 | (nth 3 position)) |
9a5336ae | 990 | |
6b61353c | 991 | (defsubst posn-string (position) |
79a09c9c KS |
992 | "Return the string object of POSITION. |
993 | Value is a cons (STRING . STRING-POS), or nil if not a string. | |
6b61353c KH |
994 | POSITION should be a list of the form returned by the `event-start' |
995 | and `event-end' functions." | |
996 | (nth 4 position)) | |
997 | ||
998 | (defsubst posn-image (position) | |
79a09c9c | 999 | "Return the image object of POSITION. |
0c3f75f6 | 1000 | Value is a list (image ...), or nil if not an image. |
6b61353c KH |
1001 | POSITION should be a list of the form returned by the `event-start' |
1002 | and `event-end' functions." | |
1003 | (nth 7 position)) | |
1004 | ||
1005 | (defsubst posn-object (position) | |
1006 | "Return the object (image or string) of POSITION. | |
79a09c9c KS |
1007 | Value is a list (image ...) for an image object, a cons cell |
1008 | \(STRING . STRING-POS) for a string object, and nil for a buffer position. | |
6b61353c KH |
1009 | POSITION should be a list of the form returned by the `event-start' |
1010 | and `event-end' functions." | |
1011 | (or (posn-image position) (posn-string position))) | |
1012 | ||
1013 | (defsubst posn-object-x-y (position) | |
1014 | "Return the x and y coordinates relative to the object of POSITION. | |
74194465 CY |
1015 | The return value has the form (DX . DY), where DX and DY are |
1016 | given in pixels. POSITION should be a list of the form returned | |
1017 | by `event-start' and `event-end'." | |
6b61353c KH |
1018 | (nth 8 position)) |
1019 | ||
1020 | (defsubst posn-object-width-height (position) | |
1021 | "Return the pixel width and height of the object of POSITION. | |
74194465 CY |
1022 | The return value has the form (WIDTH . HEIGHT). POSITION should |
1023 | be a list of the form returned by `event-start' and `event-end'." | |
6b61353c KH |
1024 | (nth 9 position)) |
1025 | ||
0f03054a | 1026 | \f |
9a5336ae JB |
1027 | ;;;; Obsolescent names for functions. |
1028 | ||
9d28c33e SM |
1029 | (define-obsolete-function-alias 'window-dot 'window-point "22.1") |
1030 | (define-obsolete-function-alias 'set-window-dot 'set-window-point "22.1") | |
1031 | (define-obsolete-function-alias 'read-input 'read-string "22.1") | |
1032 | (define-obsolete-function-alias 'show-buffer 'set-window-buffer "22.1") | |
1033 | (define-obsolete-function-alias 'eval-current-buffer 'eval-buffer "22.1") | |
1034 | (define-obsolete-function-alias 'string-to-int 'string-to-number "22.1") | |
1035 | ||
9d28c33e SM |
1036 | (make-obsolete 'forward-point "use (+ (point) N) instead." "23.1") |
1037 | ||
1038 | (defun insert-string (&rest args) | |
1039 | "Mocklisp-compatibility insert function. | |
1040 | Like the function `insert' except that any argument that is a number | |
1041 | is converted into a string by expressing it in decimal." | |
1042 | (dolist (el args) | |
1043 | (insert (if (integerp el) (number-to-string el) el)))) | |
1044 | (make-obsolete 'insert-string 'insert "22.1") | |
1045 | ||
1046 | (defun makehash (&optional test) (make-hash-table :test (or test 'eql))) | |
1047 | (make-obsolete 'makehash 'make-hash-table "22.1") | |
1048 | ||
1049 | ;; These are used by VM and some old programs | |
1050 | (defalias 'focus-frame 'ignore "") | |
1051 | (make-obsolete 'focus-frame "it does nothing." "22.1") | |
1052 | (defalias 'unfocus-frame 'ignore "") | |
1053 | (make-obsolete 'unfocus-frame "it does nothing." "22.1") | |
1054 | (make-obsolete 'make-variable-frame-local | |
1055 | "explicitly check for a frame-parameter instead." "22.2") | |
1056 | (make-obsolete 'interactive-p 'called-interactively-p "23.2") | |
f3a30a50 | 1057 | (set-advertised-calling-convention 'called-interactively-p '(kind) "23.1") |
4fcc3d32 | 1058 | (set-advertised-calling-convention |
f3a30a50 SM |
1059 | 'all-completions '(string collection &optional predicate) "23.1") |
1060 | (set-advertised-calling-convention 'unintern '(name obarray) "23.3") | |
9d28c33e SM |
1061 | \f |
1062 | ;;;; Obsolescence declarations for variables, and aliases. | |
1063 | ||
4e3b4528 SM |
1064 | ;; Special "default-FOO" variables which contain the default value of |
1065 | ;; the "FOO" variable are nasty. Their implementation is brittle, and | |
1066 | ;; slows down several unrelated variable operations; furthermore, they | |
1067 | ;; can lead to really odd behavior if you decide to make them | |
1068 | ;; buffer-local. | |
1069 | ||
1070 | ;; Not used at all in Emacs, last time I checked: | |
1071 | (make-obsolete-variable 'default-mode-line-format 'mode-line-format "23.2") | |
1072 | (make-obsolete-variable 'default-header-line-format 'header-line-format "23.2") | |
1073 | (make-obsolete-variable 'default-line-spacing 'line-spacing "23.2") | |
1074 | (make-obsolete-variable 'default-abbrev-mode 'abbrev-mode "23.2") | |
1075 | (make-obsolete-variable 'default-ctl-arrow 'ctl-arrow "23.2") | |
4e3b4528 SM |
1076 | (make-obsolete-variable 'default-truncate-lines 'truncate-lines "23.2") |
1077 | (make-obsolete-variable 'default-left-margin 'left-margin "23.2") | |
1078 | (make-obsolete-variable 'default-tab-width 'tab-width "23.2") | |
1079 | (make-obsolete-variable 'default-case-fold-search 'case-fold-search "23.2") | |
1080 | (make-obsolete-variable 'default-left-margin-width 'left-margin-width "23.2") | |
1081 | (make-obsolete-variable 'default-right-margin-width 'right-margin-width "23.2") | |
1082 | (make-obsolete-variable 'default-left-fringe-width 'left-fringe-width "23.2") | |
1083 | (make-obsolete-variable 'default-right-fringe-width 'right-fringe-width "23.2") | |
1084 | (make-obsolete-variable 'default-fringes-outside-margins 'fringes-outside-margins "23.2") | |
1085 | (make-obsolete-variable 'default-scroll-bar-width 'scroll-bar-width "23.2") | |
1086 | (make-obsolete-variable 'default-vertical-scroll-bar 'vertical-scroll-bar "23.2") | |
1087 | (make-obsolete-variable 'default-indicate-empty-lines 'indicate-empty-lines "23.2") | |
1088 | (make-obsolete-variable 'default-indicate-buffer-boundaries 'indicate-buffer-boundaries "23.2") | |
1089 | (make-obsolete-variable 'default-fringe-indicator-alist 'fringe-indicator-alist "23.2") | |
1090 | (make-obsolete-variable 'default-fringe-cursor-alist 'fringe-cursor-alist "23.2") | |
1091 | (make-obsolete-variable 'default-scroll-up-aggressively 'scroll-up-aggressively "23.2") | |
1092 | (make-obsolete-variable 'default-scroll-down-aggressively 'scroll-down-aggressively "23.2") | |
1093 | (make-obsolete-variable 'default-fill-column 'fill-column "23.2") | |
1094 | (make-obsolete-variable 'default-cursor-type 'cursor-type "23.2") | |
1095 | (make-obsolete-variable 'default-buffer-file-type 'buffer-file-type "23.2") | |
1096 | (make-obsolete-variable 'default-cursor-in-non-selected-windows 'cursor-in-non-selected-windows "23.2") | |
1097 | (make-obsolete-variable 'default-buffer-file-coding-system 'buffer-file-coding-system "23.2") | |
1098 | (make-obsolete-variable 'default-major-mode 'major-mode "23.2") | |
1099 | (make-obsolete-variable 'default-enable-multibyte-characters | |
1100 | "use enable-multibyte-characters or set-buffer-multibyte instead" "23.2") | |
1101 | ||
50d4ba39 | 1102 | (make-obsolete-variable 'define-key-rebound-commands nil "23.2") |
379ec02c SM |
1103 | (make-obsolete-variable 'redisplay-end-trigger-functions 'jit-lock-register "23.1") |
1104 | (make-obsolete 'window-redisplay-end-trigger nil "23.1") | |
1105 | (make-obsolete 'set-window-redisplay-end-trigger nil "23.1") | |
1106 | ||
1107 | (make-obsolete 'process-filter-multibyte-p nil "23.1") | |
1108 | (make-obsolete 'set-process-filter-multibyte nil "23.1") | |
1109 | ||
c8227332 VJL |
1110 | (make-obsolete-variable |
1111 | 'mode-line-inverse-video | |
1112 | "use the appropriate faces instead." | |
1113 | "21.1") | |
1114 | (make-obsolete-variable | |
1115 | 'unread-command-char | |
1116 | "use `unread-command-events' instead. That variable is a list of events | |
304bbefc | 1117 | to reread, so it now uses nil to mean `no event', instead of -1." |
c8227332 | 1118 | "before 19.15") |
bd292357 | 1119 | |
8ee7e9db LT |
1120 | ;; Lisp manual only updated in 22.1. |
1121 | (define-obsolete-variable-alias 'executing-macro 'executing-kbd-macro | |
c8227332 | 1122 | "before 19.34") |
8ee7e9db | 1123 | |
0ecd53f8 | 1124 | (defvaralias 'x-lost-selection-hooks 'x-lost-selection-functions) |
c8227332 VJL |
1125 | (make-obsolete-variable 'x-lost-selection-hooks |
1126 | 'x-lost-selection-functions "22.1") | |
0ecd53f8 | 1127 | (defvaralias 'x-sent-selection-hooks 'x-sent-selection-functions) |
c8227332 VJL |
1128 | (make-obsolete-variable 'x-sent-selection-hooks |
1129 | 'x-sent-selection-functions "22.1") | |
9e247d24 | 1130 | |
b46957e2 EZ |
1131 | ;; This was introduced in 21.4 for pre-unicode unification. That |
1132 | ;; usage was rendered obsolete in 23.1 which uses Unicode internally. | |
1133 | ;; Other uses are possible, so this variable is not _really_ obsolete, | |
1134 | ;; but Stefan insists to mark it so. | |
1135 | (make-obsolete-variable 'translation-table-for-input nil "23.1") | |
1136 | ||
9e247d24 | 1137 | (defvaralias 'messages-buffer-max-lines 'message-log-max) |
d293848d GM |
1138 | |
1139 | ;; These aliases exist in Emacs 19.34, and probably before, but were | |
1140 | ;; only marked as obsolete in 23.1. | |
fb2bae29 | 1141 | ;; The lisp manual (since at least Emacs 21) describes them as |
d293848d GM |
1142 | ;; existing "for compatibility with Emacs version 18". |
1143 | (define-obsolete-variable-alias 'last-input-char 'last-input-event | |
1144 | "at least 19.34") | |
1145 | (define-obsolete-variable-alias 'last-command-char 'last-command-event | |
1146 | "at least 19.34") | |
1147 | ||
9a5336ae JB |
1148 | \f |
1149 | ;;;; Alternate names for functions - these are not being phased out. | |
1150 | ||
a18ff988 JB |
1151 | (defalias 'send-string 'process-send-string) |
1152 | (defalias 'send-region 'process-send-region) | |
059184dd ER |
1153 | (defalias 'string= 'string-equal) |
1154 | (defalias 'string< 'string-lessp) | |
1155 | (defalias 'move-marker 'set-marker) | |
059184dd ER |
1156 | (defalias 'rplaca 'setcar) |
1157 | (defalias 'rplacd 'setcdr) | |
eb8c3be9 | 1158 | (defalias 'beep 'ding) ;preserve lingual purity |
059184dd ER |
1159 | (defalias 'indent-to-column 'indent-to) |
1160 | (defalias 'backward-delete-char 'delete-backward-char) | |
1161 | (defalias 'search-forward-regexp (symbol-function 're-search-forward)) | |
1162 | (defalias 'search-backward-regexp (symbol-function 're-search-backward)) | |
1163 | (defalias 'int-to-string 'number-to-string) | |
024ae2c6 | 1164 | (defalias 'store-match-data 'set-match-data) |
e6979067 | 1165 | (defalias 'chmod 'set-file-modes) |
53374291 | 1166 | (defalias 'mkdir 'make-directory) |
d6c22d46 | 1167 | ;; These are the XEmacs names: |
475fb2fb KH |
1168 | (defalias 'point-at-eol 'line-end-position) |
1169 | (defalias 'point-at-bol 'line-beginning-position) | |
37f6661a | 1170 | |
c4f484f2 RS |
1171 | (defalias 'user-original-login-name 'user-login-name) |
1172 | ||
be9b65ac | 1173 | \f |
9a5336ae | 1174 | ;;;; Hook manipulation functions. |
be9b65ac | 1175 | |
0e4d378b | 1176 | (defun add-hook (hook function &optional append local) |
32295976 RS |
1177 | "Add to the value of HOOK the function FUNCTION. |
1178 | FUNCTION is not added if already present. | |
1179 | FUNCTION is added (if necessary) at the beginning of the hook list | |
1180 | unless the optional argument APPEND is non-nil, in which case | |
1181 | FUNCTION is added at the end. | |
1182 | ||
0e4d378b RS |
1183 | The optional fourth argument, LOCAL, if non-nil, says to modify |
1184 | the hook's buffer-local value rather than its default value. | |
61a3d8c4 RS |
1185 | This makes the hook buffer-local if needed, and it makes t a member |
1186 | of the buffer-local value. That acts as a flag to run the hook | |
1187 | functions in the default value as well as in the local value. | |
0e4d378b | 1188 | |
32295976 RS |
1189 | HOOK should be a symbol, and FUNCTION may be any valid function. If |
1190 | HOOK is void, it is first set to nil. If HOOK's value is a single | |
aa09b5ca | 1191 | function, it is changed to a list of functions." |
be9b65ac | 1192 | (or (boundp hook) (set hook nil)) |
0e4d378b | 1193 | (or (default-boundp hook) (set-default hook nil)) |
08b1f8a1 GM |
1194 | (if local (unless (local-variable-if-set-p hook) |
1195 | (set (make-local-variable hook) (list t))) | |
8947a5e2 SM |
1196 | ;; Detect the case where make-local-variable was used on a hook |
1197 | ;; and do what we used to do. | |
1198 | (unless (and (consp (symbol-value hook)) (memq t (symbol-value hook))) | |
1199 | (setq local t))) | |
1200 | (let ((hook-value (if local (symbol-value hook) (default-value hook)))) | |
1201 | ;; If the hook value is a single function, turn it into a list. | |
1202 | (when (or (not (listp hook-value)) (eq (car hook-value) 'lambda)) | |
2248c40d | 1203 | (setq hook-value (list hook-value))) |
8947a5e2 SM |
1204 | ;; Do the actual addition if necessary |
1205 | (unless (member function hook-value) | |
ff917d63 DN |
1206 | (when (stringp function) |
1207 | (setq function (purecopy function))) | |
8947a5e2 SM |
1208 | (setq hook-value |
1209 | (if append | |
1210 | (append hook-value (list function)) | |
1211 | (cons function hook-value)))) | |
1212 | ;; Set the actual variable | |
35310461 RS |
1213 | (if local |
1214 | (progn | |
1215 | ;; If HOOK isn't a permanent local, | |
1216 | ;; but FUNCTION wants to survive a change of modes, | |
1217 | ;; mark HOOK as partially permanent. | |
1218 | (and (symbolp function) | |
1219 | (get function 'permanent-local-hook) | |
1220 | (not (get hook 'permanent-local)) | |
1221 | (put hook 'permanent-local 'permanent-local-hook)) | |
1222 | (set hook hook-value)) | |
1223 | (set-default hook hook-value)))) | |
0e4d378b RS |
1224 | |
1225 | (defun remove-hook (hook function &optional local) | |
24980d16 RS |
1226 | "Remove from the value of HOOK the function FUNCTION. |
1227 | HOOK should be a symbol, and FUNCTION may be any valid function. If | |
1228 | FUNCTION isn't the value of HOOK, or, if FUNCTION doesn't appear in the | |
0e4d378b RS |
1229 | list of hooks to run in HOOK, then nothing is done. See `add-hook'. |
1230 | ||
1231 | The optional third argument, LOCAL, if non-nil, says to modify | |
6b61353c | 1232 | the hook's buffer-local value rather than its default value." |
8947a5e2 SM |
1233 | (or (boundp hook) (set hook nil)) |
1234 | (or (default-boundp hook) (set-default hook nil)) | |
6b61353c KH |
1235 | ;; Do nothing if LOCAL is t but this hook has no local binding. |
1236 | (unless (and local (not (local-variable-p hook))) | |
8947a5e2 SM |
1237 | ;; Detect the case where make-local-variable was used on a hook |
1238 | ;; and do what we used to do. | |
6b61353c KH |
1239 | (when (and (local-variable-p hook) |
1240 | (not (and (consp (symbol-value hook)) | |
1241 | (memq t (symbol-value hook))))) | |
1242 | (setq local t)) | |
1243 | (let ((hook-value (if local (symbol-value hook) (default-value hook)))) | |
1244 | ;; Remove the function, for both the list and the non-list cases. | |
1245 | (if (or (not (listp hook-value)) (eq (car hook-value) 'lambda)) | |
1246 | (if (equal hook-value function) (setq hook-value nil)) | |
1247 | (setq hook-value (delete function (copy-sequence hook-value)))) | |
1248 | ;; If the function is on the global hook, we need to shadow it locally | |
1249 | ;;(when (and local (member function (default-value hook)) | |
1250 | ;; (not (member (cons 'not function) hook-value))) | |
1251 | ;; (push (cons 'not function) hook-value)) | |
1252 | ;; Set the actual variable | |
1253 | (if (not local) | |
1254 | (set-default hook hook-value) | |
1255 | (if (equal hook-value '(t)) | |
1256 | (kill-local-variable hook) | |
1257 | (set hook hook-value)))))) | |
6e3af630 | 1258 | |
62e197b1 | 1259 | (defun add-to-list (list-var element &optional append compare-fn) |
4072ef25 | 1260 | "Add ELEMENT to the value of LIST-VAR if it isn't there yet. |
62e197b1 RS |
1261 | The test for presence of ELEMENT is done with `equal', |
1262 | or with COMPARE-FN if that's non-nil. | |
c8bfa689 MB |
1263 | If ELEMENT is added, it is added at the beginning of the list, |
1264 | unless the optional argument APPEND is non-nil, in which case | |
1265 | ELEMENT is added at the end. | |
508bcbca | 1266 | |
daebae3d PJ |
1267 | The return value is the new value of LIST-VAR. |
1268 | ||
8851c1f0 RS |
1269 | If you want to use `add-to-list' on a variable that is not defined |
1270 | until a certain package is loaded, you should put the call to `add-to-list' | |
1271 | into a hook function that will be run only after loading the package. | |
1272 | `eval-after-load' provides one way to do this. In some cases | |
1273 | other hooks, such as major mode hooks, can do the job." | |
fb1a5d8a | 1274 | (if (cond |
78bdfbf3 | 1275 | ((null compare-fn) |
62e197b1 | 1276 | (member element (symbol-value list-var))) |
fb1a5d8a KS |
1277 | ((eq compare-fn 'eq) |
1278 | (memq element (symbol-value list-var))) | |
1279 | ((eq compare-fn 'eql) | |
1280 | (memql element (symbol-value list-var))) | |
78bdfbf3 | 1281 | (t |
2d1dd54d DK |
1282 | (let ((lst (symbol-value list-var))) |
1283 | (while (and lst | |
1284 | (not (funcall compare-fn element (car lst)))) | |
1285 | (setq lst (cdr lst))) | |
1286 | lst))) | |
15171a06 | 1287 | (symbol-value list-var) |
c8bfa689 MB |
1288 | (set list-var |
1289 | (if append | |
1290 | (append (symbol-value list-var) (list element)) | |
1291 | (cons element (symbol-value list-var)))))) | |
448a0170 | 1292 | |
cbbd0b5a KS |
1293 | |
1294 | (defun add-to-ordered-list (list-var element &optional order) | |
4072ef25 | 1295 | "Add ELEMENT to the value of LIST-VAR if it isn't there yet. |
ef1eef06 | 1296 | The test for presence of ELEMENT is done with `eq'. |
cbbd0b5a KS |
1297 | |
1298 | The resulting list is reordered so that the elements are in the | |
ef1eef06 KS |
1299 | order given by each element's numeric list order. Elements |
1300 | without a numeric list order are placed at the end of the list. | |
cbbd0b5a | 1301 | |
4072ef25 LT |
1302 | If the third optional argument ORDER is a number (integer or |
1303 | float), set the element's list order to the given value. If | |
1304 | ORDER is nil or omitted, do not change the numeric order of | |
1305 | ELEMENT. If ORDER has any other value, remove the numeric order | |
1306 | of ELEMENT if it has one. | |
8da6c2f8 | 1307 | |
219fd6cf | 1308 | The list order for each element is stored in LIST-VAR's |
8da6c2f8 | 1309 | `list-order' property. |
cbbd0b5a KS |
1310 | |
1311 | The return value is the new value of LIST-VAR." | |
219fd6cf SM |
1312 | (let ((ordering (get list-var 'list-order))) |
1313 | (unless ordering | |
1314 | (put list-var 'list-order | |
1315 | (setq ordering (make-hash-table :weakness 'key :test 'eq)))) | |
8da6c2f8 | 1316 | (when order |
ef1eef06 KS |
1317 | (puthash element (and (numberp order) order) ordering)) |
1318 | (unless (memq element (symbol-value list-var)) | |
1319 | (set list-var (cons element (symbol-value list-var)))) | |
8da6c2f8 KS |
1320 | (set list-var (sort (symbol-value list-var) |
1321 | (lambda (a b) | |
219fd6cf SM |
1322 | (let ((oa (gethash a ordering)) |
1323 | (ob (gethash b ordering))) | |
ef1eef06 KS |
1324 | (if (and oa ob) |
1325 | (< oa ob) | |
1326 | oa))))))) | |
6b04bd6e | 1327 | |
d7494911 | 1328 | (defun add-to-history (history-var newelt &optional maxelt keep-all) |
6b04bd6e KS |
1329 | "Add NEWELT to the history list stored in the variable HISTORY-VAR. |
1330 | Return the new history list. | |
1331 | If MAXELT is non-nil, it specifies the maximum length of the history. | |
1332 | Otherwise, the maximum history length is the value of the `history-length' | |
1333 | property on symbol HISTORY-VAR, if set, or the value of the `history-length' | |
1334 | variable. | |
d7494911 KS |
1335 | Remove duplicates of NEWELT if `history-delete-duplicates' is non-nil. |
1336 | If optional fourth arg KEEP-ALL is non-nil, add NEWELT to history even | |
1337 | if it is empty or a duplicate." | |
6b04bd6e KS |
1338 | (unless maxelt |
1339 | (setq maxelt (or (get history-var 'history-length) | |
1340 | history-length))) | |
1341 | (let ((history (symbol-value history-var)) | |
1342 | tail) | |
d7494911 KS |
1343 | (when (and (listp history) |
1344 | (or keep-all | |
1345 | (not (stringp newelt)) | |
1346 | (> (length newelt) 0)) | |
1347 | (or keep-all | |
1348 | (not (equal (car history) newelt)))) | |
1349 | (if history-delete-duplicates | |
1350 | (delete newelt history)) | |
1351 | (setq history (cons newelt history)) | |
1352 | (when (integerp maxelt) | |
1353 | (if (= 0 maxelt) | |
1354 | (setq history nil) | |
1355 | (setq tail (nthcdr (1- maxelt) history)) | |
1356 | (when (consp tail) | |
1357 | (setcdr tail nil))))) | |
6b04bd6e KS |
1358 | (set history-var history))) |
1359 | ||
c4f484f2 RS |
1360 | \f |
1361 | ;;;; Mode hooks. | |
1362 | ||
1363 | (defvar delay-mode-hooks nil | |
1364 | "If non-nil, `run-mode-hooks' should delay running the hooks.") | |
1365 | (defvar delayed-mode-hooks nil | |
1366 | "List of delayed mode hooks waiting to be run.") | |
1367 | (make-variable-buffer-local 'delayed-mode-hooks) | |
1368 | (put 'delay-mode-hooks 'permanent-local t) | |
cbbd0b5a | 1369 | |
c4f484f2 RS |
1370 | (defvar after-change-major-mode-hook nil |
1371 | "Normal hook run at the very end of major mode functions.") | |
1372 | ||
1373 | (defun run-mode-hooks (&rest hooks) | |
1374 | "Run mode hooks `delayed-mode-hooks' and HOOKS, or delay HOOKS. | |
5612fd08 GM |
1375 | Execution is delayed if the variable `delay-mode-hooks' is non-nil. |
1376 | Otherwise, runs the mode hooks and then `after-change-major-mode-hook'. | |
337a64d1 SM |
1377 | Major mode functions should use this instead of `run-hooks' when running their |
1378 | FOO-mode-hook." | |
c4f484f2 RS |
1379 | (if delay-mode-hooks |
1380 | ;; Delaying case. | |
1381 | (dolist (hook hooks) | |
1382 | (push hook delayed-mode-hooks)) | |
1383 | ;; Normal case, just run the hook as before plus any delayed hooks. | |
1384 | (setq hooks (nconc (nreverse delayed-mode-hooks) hooks)) | |
1385 | (setq delayed-mode-hooks nil) | |
1386 | (apply 'run-hooks hooks) | |
1387 | (run-hooks 'after-change-major-mode-hook))) | |
1388 | ||
1389 | (defmacro delay-mode-hooks (&rest body) | |
1390 | "Execute BODY, but delay any `run-mode-hooks'. | |
1391 | These hooks will be executed by the first following call to | |
1392 | `run-mode-hooks' that occurs outside any `delayed-mode-hooks' form. | |
1393 | Only affects hooks run in the current buffer." | |
1394 | (declare (debug t) (indent 0)) | |
1395 | `(progn | |
1396 | (make-local-variable 'delay-mode-hooks) | |
1397 | (let ((delay-mode-hooks t)) | |
1398 | ,@body))) | |
1399 | ||
1400 | ;; PUBLIC: find if the current mode derives from another. | |
1401 | ||
1402 | (defun derived-mode-p (&rest modes) | |
1403 | "Non-nil if the current major mode is derived from one of MODES. | |
1404 | Uses the `derived-mode-parent' property of the symbol to trace backwards." | |
1405 | (let ((parent major-mode)) | |
1406 | (while (and (not (memq parent modes)) | |
1407 | (setq parent (get parent 'derived-mode-parent)))) | |
1408 | parent)) | |
1409 | \f | |
1410 | ;;;; Minor modes. | |
1411 | ||
1412 | ;; If a minor mode is not defined with define-minor-mode, | |
1413 | ;; add it here explicitly. | |
1414 | ;; isearch-mode is deliberately excluded, since you should | |
1415 | ;; not call it yourself. | |
1416 | (defvar minor-mode-list '(auto-save-mode auto-fill-mode abbrev-mode | |
1417 | overwrite-mode view-mode | |
1418 | hs-minor-mode) | |
1419 | "List of all minor mode functions.") | |
1420 | ||
1421 | (defun add-minor-mode (toggle name &optional keymap after toggle-fun) | |
1422 | "Register a new minor mode. | |
1423 | ||
1424 | This is an XEmacs-compatibility function. Use `define-minor-mode' instead. | |
1425 | ||
1426 | TOGGLE is a symbol which is the name of a buffer-local variable that | |
1427 | is toggled on or off to say whether the minor mode is active or not. | |
1428 | ||
1429 | NAME specifies what will appear in the mode line when the minor mode | |
1430 | is active. NAME should be either a string starting with a space, or a | |
1431 | symbol whose value is such a string. | |
1432 | ||
1433 | Optional KEYMAP is the keymap for the minor mode that will be added | |
1434 | to `minor-mode-map-alist'. | |
1435 | ||
1436 | Optional AFTER specifies that TOGGLE should be added after AFTER | |
1437 | in `minor-mode-alist'. | |
1438 | ||
1439 | Optional TOGGLE-FUN is an interactive function to toggle the mode. | |
1440 | It defaults to (and should by convention be) TOGGLE. | |
1441 | ||
1442 | If TOGGLE has a non-nil `:included' property, an entry for the mode is | |
1443 | included in the mode-line minor mode menu. | |
1444 | If TOGGLE has a `:menu-tag', that is used for the menu item's label." | |
1445 | (unless (memq toggle minor-mode-list) | |
1446 | (push toggle minor-mode-list)) | |
1447 | ||
1448 | (unless toggle-fun (setq toggle-fun toggle)) | |
1449 | (unless (eq toggle-fun toggle) | |
1450 | (put toggle :minor-mode-function toggle-fun)) | |
1451 | ;; Add the name to the minor-mode-alist. | |
1452 | (when name | |
1453 | (let ((existing (assq toggle minor-mode-alist))) | |
1454 | (if existing | |
1455 | (setcdr existing (list name)) | |
1456 | (let ((tail minor-mode-alist) found) | |
1457 | (while (and tail (not found)) | |
1458 | (if (eq after (caar tail)) | |
1459 | (setq found tail) | |
1460 | (setq tail (cdr tail)))) | |
1461 | (if found | |
1462 | (let ((rest (cdr found))) | |
1463 | (setcdr found nil) | |
1464 | (nconc found (list (list toggle name)) rest)) | |
365f8d85 | 1465 | (push (list toggle name) minor-mode-alist)))))) |
c4f484f2 RS |
1466 | ;; Add the toggle to the minor-modes menu if requested. |
1467 | (when (get toggle :included) | |
1468 | (define-key mode-line-mode-menu | |
1469 | (vector toggle) | |
1470 | (list 'menu-item | |
1471 | (concat | |
1472 | (or (get toggle :menu-tag) | |
1473 | (if (stringp name) name (symbol-name toggle))) | |
1474 | (let ((mode-name (if (symbolp name) (symbol-value name)))) | |
1475 | (if (and (stringp mode-name) (string-match "[^ ]+" mode-name)) | |
1476 | (concat " (" (match-string 0 mode-name) ")")))) | |
1477 | toggle-fun | |
1478 | :button (cons :toggle toggle)))) | |
cbbd0b5a | 1479 | |
c4f484f2 RS |
1480 | ;; Add the map to the minor-mode-map-alist. |
1481 | (when keymap | |
1482 | (let ((existing (assq toggle minor-mode-map-alist))) | |
1483 | (if existing | |
1484 | (setcdr existing keymap) | |
1485 | (let ((tail minor-mode-map-alist) found) | |
1486 | (while (and tail (not found)) | |
1487 | (if (eq after (caar tail)) | |
1488 | (setq found tail) | |
1489 | (setq tail (cdr tail)))) | |
1490 | (if found | |
1491 | (let ((rest (cdr found))) | |
1492 | (setcdr found nil) | |
1493 | (nconc found (list (cons toggle keymap)) rest)) | |
365f8d85 | 1494 | (push (cons toggle keymap) minor-mode-map-alist))))))) |
448a0170 MB |
1495 | \f |
1496 | ;;; Load history | |
1497 | ||
9e247d24 | 1498 | (defun symbol-file (symbol &optional type) |
37fda77e MR |
1499 | "Return the name of the file that defined SYMBOL. |
1500 | The value is normally an absolute file name. It can also be nil, | |
1501 | if the definition is not associated with any file. If SYMBOL | |
1502 | specifies an autoloaded function, the value can be a relative | |
1503 | file name without extension. | |
1504 | ||
1505 | If TYPE is nil, then any kind of definition is acceptable. If | |
1506 | TYPE is `defun', `defvar', or `defface', that specifies function | |
1507 | definition, variable definition, or face definition only." | |
9e247d24 RS |
1508 | (if (and (or (null type) (eq type 'defun)) |
1509 | (symbolp symbol) (fboundp symbol) | |
1510 | (eq 'autoload (car-safe (symbol-function symbol)))) | |
1511 | (nth 1 (symbol-function symbol)) | |
e9f13a95 | 1512 | (let ((files load-history) |
cb21744e | 1513 | file) |
e9f13a95 | 1514 | (while files |
9e247d24 RS |
1515 | (if (if type |
1516 | (if (eq type 'defvar) | |
1517 | ;; Variables are present just as their names. | |
1518 | (member symbol (cdr (car files))) | |
1519 | ;; Other types are represented as (TYPE . NAME). | |
1520 | (member (cons type symbol) (cdr (car files)))) | |
1521 | ;; We accept all types, so look for variable def | |
1522 | ;; and then for any other kind. | |
1523 | (or (member symbol (cdr (car files))) | |
1524 | (rassq symbol (cdr (car files))))) | |
e9f13a95 SM |
1525 | (setq file (car (car files)) files nil)) |
1526 | (setq files (cdr files))) | |
1527 | file))) | |
448a0170 | 1528 | |
059a552c RF |
1529 | (defun locate-library (library &optional nosuffix path interactive-call) |
1530 | "Show the precise file name of Emacs library LIBRARY. | |
c9ae6ddd EZ |
1531 | LIBRARY should be a relative file name of the library, a string. |
1532 | It can omit the suffix (a.k.a. file-name extension) if NOSUFFIX is | |
1533 | nil (which is the default, see below). | |
059a552c RF |
1534 | This command searches the directories in `load-path' like `\\[load-library]' |
1535 | to find the file that `\\[load-library] RET LIBRARY RET' would load. | |
1536 | Optional second arg NOSUFFIX non-nil means don't add suffixes `load-suffixes' | |
1537 | to the specified name LIBRARY. | |
1538 | ||
1539 | If the optional third arg PATH is specified, that list of directories | |
1540 | is used instead of `load-path'. | |
1541 | ||
3ac9d254 | 1542 | When called from a program, the file name is normally returned as a |
059a552c RF |
1543 | string. When run interactively, the argument INTERACTIVE-CALL is t, |
1544 | and the file name is displayed in the echo area." | |
1545 | (interactive (list (completing-read "Locate library: " | |
6a021917 SM |
1546 | (apply-partially |
1547 | 'locate-file-completion-table | |
1548 | load-path (get-load-suffixes))) | |
059a552c RF |
1549 | nil nil |
1550 | t)) | |
1551 | (let ((file (locate-file library | |
1552 | (or path load-path) | |
667b73dc LT |
1553 | (append (unless nosuffix (get-load-suffixes)) |
1554 | load-file-rep-suffixes)))) | |
059a552c RF |
1555 | (if interactive-call |
1556 | (if file | |
1557 | (message "Library is file %s" (abbreviate-file-name file)) | |
1558 | (message "No library %s in search path" library))) | |
1559 | file)) | |
1560 | ||
be9b65ac | 1561 | \f |
adbe2d11 RS |
1562 | ;;;; Specifying things to do later. |
1563 | ||
33d74677 | 1564 | (defun load-history-regexp (file) |
0988217a RS |
1565 | "Form a regexp to find FILE in `load-history'. |
1566 | FILE, a string, is described in the function `eval-after-load'." | |
33d74677 AM |
1567 | (if (file-name-absolute-p file) |
1568 | (setq file (file-truename file))) | |
0988217a | 1569 | (concat (if (file-name-absolute-p file) "\\`" "\\(\\`\\|/\\)") |
33d74677 AM |
1570 | (regexp-quote file) |
1571 | (if (file-name-extension file) | |
1572 | "" | |
1573 | ;; Note: regexp-opt can't be used here, since we need to call | |
1574 | ;; this before Emacs has been fully started. 2006-05-21 | |
1575 | (concat "\\(" (mapconcat 'regexp-quote load-suffixes "\\|") "\\)?")) | |
1576 | "\\(" (mapconcat 'regexp-quote jka-compr-load-suffixes "\\|") | |
1577 | "\\)?\\'")) | |
1578 | ||
1579 | (defun load-history-filename-element (file-regexp) | |
0988217a | 1580 | "Get the first elt of `load-history' whose car matches FILE-REGEXP. |
33d74677 AM |
1581 | Return nil if there isn't one." |
1582 | (let* ((loads load-history) | |
1583 | (load-elt (and loads (car loads)))) | |
1584 | (save-match-data | |
1585 | (while (and loads | |
1586 | (or (null (car load-elt)) | |
1587 | (not (string-match file-regexp (car load-elt))))) | |
1588 | (setq loads (cdr loads) | |
1589 | load-elt (and loads (car loads))))) | |
1590 | load-elt)) | |
1591 | ||
f291fe60 | 1592 | (put 'eval-after-load 'lisp-indent-function 1) |
9a5336ae JB |
1593 | (defun eval-after-load (file form) |
1594 | "Arrange that, if FILE is ever loaded, FORM will be run at that time. | |
90914938 | 1595 | If FILE is already loaded, evaluate FORM right now. |
33d74677 AM |
1596 | |
1597 | If a matching file is loaded again, FORM will be evaluated again. | |
1598 | ||
1599 | If FILE is a string, it may be either an absolute or a relative file | |
1600 | name, and may have an extension \(e.g. \".el\") or may lack one, and | |
1601 | additionally may or may not have an extension denoting a compressed | |
1602 | format \(e.g. \".gz\"). | |
1603 | ||
0988217a RS |
1604 | When FILE is absolute, this first converts it to a true name by chasing |
1605 | symbolic links. Only a file of this name \(see next paragraph regarding | |
33d74677 AM |
1606 | extensions) will trigger the evaluation of FORM. When FILE is relative, |
1607 | a file whose absolute true name ends in FILE will trigger evaluation. | |
1608 | ||
1609 | When FILE lacks an extension, a file name with any extension will trigger | |
1610 | evaluation. Otherwise, its extension must match FILE's. A further | |
1611 | extension for a compressed format \(e.g. \".gz\") on FILE will not affect | |
1612 | this name matching. | |
1613 | ||
1614 | Alternatively, FILE can be a feature (i.e. a symbol), in which case FORM | |
3fa173b4 | 1615 | is evaluated at the end of any file that `provide's this feature. |
33d74677 AM |
1616 | |
1617 | Usually FILE is just a library name like \"font-lock\" or a feature name | |
1618 | like 'font-lock. | |
1619 | ||
1620 | This function makes or adds to an entry on `after-load-alist'." | |
1621 | ;; Add this FORM into after-load-alist (regardless of whether we'll be | |
1622 | ;; evaluating it now). | |
1623 | (let* ((regexp-or-feature | |
3fa173b4 SM |
1624 | (if (stringp file) |
1625 | (setq file (purecopy (load-history-regexp file))) | |
1626 | file)) | |
33d74677 AM |
1627 | (elt (assoc regexp-or-feature after-load-alist))) |
1628 | (unless elt | |
1629 | (setq elt (list regexp-or-feature)) | |
1630 | (push elt after-load-alist)) | |
3fa173b4 SM |
1631 | (when (symbolp regexp-or-feature) |
1632 | ;; For features, the after-load-alist elements get run when `provide' is | |
1633 | ;; called rather than at the end of the file. So add an indirection to | |
1634 | ;; make sure that `form' is really run "after-load" in case the provide | |
1635 | ;; call happens early. | |
1636 | (setq form | |
1637 | `(when load-file-name | |
1638 | (let ((fun (make-symbol "eval-after-load-helper"))) | |
1639 | (fset fun `(lambda (file) | |
1640 | (if (not (equal file ',load-file-name)) | |
1641 | nil | |
1642 | (remove-hook 'after-load-functions ',fun) | |
1643 | ,',form))) | |
1644 | (add-hook 'after-load-functions fun))))) | |
33d74677 | 1645 | ;; Add FORM to the element unless it's already there. |
a2d7836f | 1646 | (unless (member form (cdr elt)) |
ff917d63 | 1647 | (nconc elt (purecopy (list form)))) |
33d74677 AM |
1648 | |
1649 | ;; Is there an already loaded file whose name (or `provide' name) | |
1650 | ;; matches FILE? | |
1651 | (if (if (stringp file) | |
1652 | (load-history-filename-element regexp-or-feature) | |
1653 | (featurep file)) | |
1654 | (eval form)))) | |
1655 | ||
838ff458 SM |
1656 | (defvar after-load-functions nil |
1657 | "Special hook run after loading a file. | |
1658 | Each function there is called with a single argument, the absolute | |
1659 | name of the file just loaded.") | |
1660 | ||
33d74677 AM |
1661 | (defun do-after-load-evaluation (abs-file) |
1662 | "Evaluate all `eval-after-load' forms, if any, for ABS-FILE. | |
5766c380 SM |
1663 | ABS-FILE, a string, should be the absolute true name of a file just loaded. |
1664 | This function is called directly from the C code." | |
1665 | ;; Run the relevant eval-after-load forms. | |
060c08b5 JB |
1666 | (mapc #'(lambda (a-l-element) |
1667 | (when (and (stringp (car a-l-element)) | |
1668 | (string-match-p (car a-l-element) abs-file)) | |
1669 | ;; discard the file name regexp | |
1670 | (mapc #'eval (cdr a-l-element)))) | |
5766c380 SM |
1671 | after-load-alist) |
1672 | ;; Complain when the user uses obsolete files. | |
838ff458 | 1673 | (when (string-match-p "/obsolete/[^/]*\\'" abs-file) |
5766c380 SM |
1674 | (run-with-timer 0 nil |
1675 | (lambda (file) | |
1676 | (message "Package %s is obsolete!" | |
1677 | (substring file 0 | |
1678 | (string-match "\\.elc?\\>" file)))) | |
838ff458 SM |
1679 | (file-name-nondirectory abs-file))) |
1680 | ;; Finally, run any other hook. | |
1681 | (run-hook-with-args 'after-load-functions abs-file)) | |
9a5336ae JB |
1682 | |
1683 | (defun eval-next-after-load (file) | |
1684 | "Read the following input sexp, and run it whenever FILE is loaded. | |
1685 | This makes or adds to an entry on `after-load-alist'. | |
1686 | FILE should be the name of a library, with no directory name." | |
1687 | (eval-after-load file (read))) | |
354f0faf | 1688 | (make-obsolete 'eval-next-after-load `eval-after-load "23.2") |
7aaacaff | 1689 | \f |
c4f484f2 RS |
1690 | ;;;; Process stuff. |
1691 | ||
d43c8d03 GM |
1692 | (defun process-lines (program &rest args) |
1693 | "Execute PROGRAM with ARGS, returning its output as a list of lines. | |
1694 | Signal an error if the program returns with a non-zero exit status." | |
1695 | (with-temp-buffer | |
1696 | (let ((status (apply 'call-process program nil (current-buffer) nil args))) | |
1697 | (unless (eq status 0) | |
1698 | (error "%s exited with status %s" program status)) | |
1699 | (goto-char (point-min)) | |
1700 | (let (lines) | |
1701 | (while (not (eobp)) | |
1702 | (setq lines (cons (buffer-substring-no-properties | |
1703 | (line-beginning-position) | |
1704 | (line-end-position)) | |
1705 | lines)) | |
1706 | (forward-line 1)) | |
1707 | (nreverse lines))))) | |
1708 | ||
c4f484f2 | 1709 | ;; open-network-stream is a wrapper around make-network-process. |
7aaacaff | 1710 | |
149d2fd3 KS |
1711 | (when (featurep 'make-network-process) |
1712 | (defun open-network-stream (name buffer host service) | |
c8227332 | 1713 | "Open a TCP connection for a service to a host. |
7aaacaff RS |
1714 | Returns a subprocess-object to represent the connection. |
1715 | Input and output work as for subprocesses; `delete-process' closes it. | |
a478f3e1 | 1716 | |
00b9254c GM |
1717 | NAME is the name for the process. It is modified if necessary to make |
1718 | it unique. | |
6ec6d6f4 GM |
1719 | BUFFER is the buffer (or buffer name) to associate with the |
1720 | process. Process output goes at end of that buffer. BUFFER may | |
1721 | be nil, meaning that this process is not associated with any buffer. | |
1722 | HOST is the name or IP address of the host to connect to. | |
1723 | SERVICE is the name of the service desired, or an integer specifying | |
1724 | a port number to connect to. | |
1725 | ||
1726 | This is a wrapper around `make-network-process', and only offers a | |
1727 | subset of its functionality." | |
c8227332 VJL |
1728 | (make-network-process :name name :buffer buffer |
1729 | :host host :service service))) | |
7aaacaff RS |
1730 | |
1731 | ;; compatibility | |
1732 | ||
c8227332 VJL |
1733 | (make-obsolete |
1734 | 'process-kill-without-query | |
1735 | "use `process-query-on-exit-flag' or `set-process-query-on-exit-flag'." | |
1736 | "22.1") | |
7aaacaff RS |
1737 | (defun process-kill-without-query (process &optional flag) |
1738 | "Say no query needed if PROCESS is running when Emacs is exited. | |
1739 | Optional second argument if non-nil says to require a query. | |
a478f3e1 | 1740 | Value is t if a query was formerly required." |
7aaacaff RS |
1741 | (let ((old (process-query-on-exit-flag process))) |
1742 | (set-process-query-on-exit-flag process nil) | |
1743 | old)) | |
9a5336ae | 1744 | |
d842b103 JL |
1745 | (defun process-kill-buffer-query-function () |
1746 | "Ask before killing a buffer that has a running process." | |
1747 | (let ((process (get-buffer-process (current-buffer)))) | |
1748 | (or (not process) | |
1749 | (not (memq (process-status process) '(run stop open listen))) | |
1750 | (not (process-query-on-exit-flag process)) | |
1751 | (yes-or-no-p "Buffer has a running process; kill it? ")))) | |
1752 | ||
1753 | (add-hook 'kill-buffer-query-functions 'process-kill-buffer-query-function) | |
1754 | ||
34368d12 KS |
1755 | ;; process plist management |
1756 | ||
1757 | (defun process-get (process propname) | |
1758 | "Return the value of PROCESS' PROPNAME property. | |
1759 | This is the last value stored with `(process-put PROCESS PROPNAME VALUE)'." | |
1760 | (plist-get (process-plist process) propname)) | |
1761 | ||
1762 | (defun process-put (process propname value) | |
1763 | "Change PROCESS' PROPNAME property to VALUE. | |
1764 | It can be retrieved with `(process-get PROCESS PROPNAME)'." | |
f1180544 | 1765 | (set-process-plist process |
34368d12 KS |
1766 | (plist-put (process-plist process) propname value))) |
1767 | ||
9a5336ae JB |
1768 | \f |
1769 | ;;;; Input and display facilities. | |
1770 | ||
77a5664f | 1771 | (defvar read-quoted-char-radix 8 |
1ba764de | 1772 | "*Radix for \\[quoted-insert] and other uses of `read-quoted-char'. |
77a5664f RS |
1773 | Legitimate radix values are 8, 10 and 16.") |
1774 | ||
1775 | (custom-declare-variable-early | |
264ef586 | 1776 | 'read-quoted-char-radix 8 |
77a5664f | 1777 | "*Radix for \\[quoted-insert] and other uses of `read-quoted-char'. |
1ba764de | 1778 | Legitimate radix values are 8, 10 and 16." |
c8227332 VJL |
1779 | :type '(choice (const 8) (const 10) (const 16)) |
1780 | :group 'editing-basics) | |
1ba764de | 1781 | |
03a74b84 SM |
1782 | (defconst read-key-empty-map (make-sparse-keymap)) |
1783 | ||
79bd5ba1 | 1784 | (defvar read-key-delay 0.01) ;Fast enough for 100Hz repeat rate, hopefully. |
03a74b84 SM |
1785 | |
1786 | (defun read-key (&optional prompt) | |
1787 | "Read a key from the keyboard. | |
1788 | Contrary to `read-event' this will not return a raw event but instead will | |
1789 | obey the input decoding and translations usually done by `read-key-sequence'. | |
1790 | So escape sequences and keyboard encoding are taken into account. | |
1791 | When there's an ambiguity because the key looks like the prefix of | |
1792 | some sort of escape sequence, the ambiguity is resolved via `read-key-delay'." | |
1793 | (let ((overriding-terminal-local-map read-key-empty-map) | |
1794 | (overriding-local-map nil) | |
3ff78624 | 1795 | (echo-keystrokes 0) |
03a74b84 SM |
1796 | (old-global-map (current-global-map)) |
1797 | (timer (run-with-idle-timer | |
1798 | ;; Wait long enough that Emacs has the time to receive and | |
1799 | ;; process all the raw events associated with the single-key. | |
1800 | ;; But don't wait too long, or the user may find the delay | |
1801 | ;; annoying (or keep hitting more keys which may then get | |
1802 | ;; lost or misinterpreted). | |
1803 | ;; This is only relevant for keys which Emacs perceives as | |
1804 | ;; "prefixes", such as C-x (because of the C-x 8 map in | |
1805 | ;; key-translate-table and the C-x @ map in function-key-map) | |
1806 | ;; or ESC (because of terminal escape sequences in | |
1807 | ;; input-decode-map). | |
1808 | read-key-delay t | |
1809 | (lambda () | |
1810 | (let ((keys (this-command-keys-vector))) | |
1811 | (unless (zerop (length keys)) | |
1812 | ;; `keys' is non-empty, so the user has hit at least | |
1813 | ;; one key; there's no point waiting any longer, even | |
1814 | ;; though read-key-sequence thinks we should wait | |
1815 | ;; for more input to decide how to interpret the | |
1816 | ;; current input. | |
1817 | (throw 'read-key keys))))))) | |
1818 | (unwind-protect | |
1819 | (progn | |
186e86db SM |
1820 | (use-global-map |
1821 | (let ((map (make-sparse-keymap))) | |
1822 | ;; Don't hide the menu-bar and tool-bar entries. | |
1823 | (define-key map [menu-bar] (lookup-key global-map [menu-bar])) | |
1824 | (define-key map [tool-bar] (lookup-key global-map [tool-bar])) | |
1825 | map)) | |
79bd5ba1 | 1826 | (aref (catch 'read-key (read-key-sequence-vector prompt nil t)) 0)) |
03a74b84 SM |
1827 | (cancel-timer timer) |
1828 | (use-global-map old-global-map)))) | |
1829 | ||
9a5336ae | 1830 | (defun read-quoted-char (&optional prompt) |
2444730b RS |
1831 | "Like `read-char', but do not allow quitting. |
1832 | Also, if the first character read is an octal digit, | |
1833 | we read any number of octal digits and return the | |
569b03f2 | 1834 | specified character code. Any nondigit terminates the sequence. |
1ba764de | 1835 | If the terminator is RET, it is discarded; |
2444730b RS |
1836 | any other terminator is used itself as input. |
1837 | ||
569b03f2 RS |
1838 | The optional argument PROMPT specifies a string to use to prompt the user. |
1839 | The variable `read-quoted-char-radix' controls which radix to use | |
1840 | for numeric input." | |
c83256a0 | 1841 | (let ((message-log-max nil) done (first t) (code 0) char translated) |
2444730b RS |
1842 | (while (not done) |
1843 | (let ((inhibit-quit first) | |
42e636f0 KH |
1844 | ;; Don't let C-h get the help message--only help function keys. |
1845 | (help-char nil) | |
1846 | (help-form | |
1847 | "Type the special character you want to use, | |
2444730b | 1848 | or the octal character code. |
1ba764de | 1849 | RET terminates the character code and is discarded; |
2444730b | 1850 | any other non-digit terminates the character code and is then used as input.")) |
3f0161d0 | 1851 | (setq char (read-event (and prompt (format "%s-" prompt)) t)) |
9a5336ae | 1852 | (if inhibit-quit (setq quit-flag nil))) |
3f0161d0 SM |
1853 | ;; Translate TAB key into control-I ASCII character, and so on. |
1854 | ;; Note: `read-char' does it using the `ascii-character' property. | |
278847cd SM |
1855 | ;; We should try and use read-key instead. |
1856 | (let ((translation (lookup-key local-function-key-map (vector char)))) | |
b8add347 SM |
1857 | (setq translated (if (arrayp translation) |
1858 | (aref translation 0) | |
1859 | char))) | |
1860 | (if (integerp translated) | |
1861 | (setq translated (char-resolve-modifiers translated))) | |
c83256a0 RS |
1862 | (cond ((null translated)) |
1863 | ((not (integerp translated)) | |
1864 | (setq unread-command-events (list char) | |
1ba764de | 1865 | done t)) |
c83256a0 | 1866 | ((/= (logand translated ?\M-\^@) 0) |
bf896a1b | 1867 | ;; Turn a meta-character into a character with the 0200 bit set. |
c83256a0 | 1868 | (setq code (logior (logand translated (lognot ?\M-\^@)) 128) |
bf896a1b | 1869 | done t)) |
4fcc3d32 SM |
1870 | ((and (<= ?0 translated) |
1871 | (< translated (+ ?0 (min 10 read-quoted-char-radix)))) | |
c83256a0 RS |
1872 | (setq code (+ (* code read-quoted-char-radix) (- translated ?0))) |
1873 | (and prompt (setq prompt (message "%s %c" prompt translated)))) | |
1874 | ((and (<= ?a (downcase translated)) | |
4fcc3d32 SM |
1875 | (< (downcase translated) |
1876 | (+ ?a -10 (min 36 read-quoted-char-radix)))) | |
92304bc8 | 1877 | (setq code (+ (* code read-quoted-char-radix) |
c83256a0 RS |
1878 | (+ 10 (- (downcase translated) ?a)))) |
1879 | (and prompt (setq prompt (message "%s %c" prompt translated)))) | |
1880 | ((and (not first) (eq translated ?\C-m)) | |
2444730b RS |
1881 | (setq done t)) |
1882 | ((not first) | |
c83256a0 | 1883 | (setq unread-command-events (list char) |
2444730b | 1884 | done t)) |
c83256a0 | 1885 | (t (setq code translated |
2444730b RS |
1886 | done t))) |
1887 | (setq first nil)) | |
bf896a1b | 1888 | code)) |
9a5336ae | 1889 | |
266725f1 SJ |
1890 | (defun read-passwd (prompt &optional confirm default) |
1891 | "Read a password, prompting with PROMPT, and return it. | |
1892 | If optional CONFIRM is non-nil, read the password twice to make sure. | |
1893 | Optional DEFAULT is a default password to use instead of empty input. | |
1894 | ||
1895 | This function echoes `.' for each character that the user types. | |
08640de5 CY |
1896 | |
1897 | The user ends with RET, LFD, or ESC. DEL or C-h rubs out. | |
1898 | C-y yanks the current kill. C-u kills line. | |
266725f1 | 1899 | C-g quits; if `inhibit-quit' was non-nil around this function, |
3fa173b4 | 1900 | then it returns nil if the user types C-g, but `quit-flag' remains set. |
266725f1 SJ |
1901 | |
1902 | Once the caller uses the password, it can erase the password | |
1903 | by doing (clear-string STRING)." | |
1904 | (with-local-quit | |
1905 | (if confirm | |
1906 | (let (success) | |
1907 | (while (not success) | |
1908 | (let ((first (read-passwd prompt nil default)) | |
1909 | (second (read-passwd "Confirm password: " nil default))) | |
1910 | (if (equal first second) | |
1911 | (progn | |
1912 | (and (arrayp second) (clear-string second)) | |
1913 | (setq success first)) | |
1914 | (and (arrayp first) (clear-string first)) | |
1915 | (and (arrayp second) (clear-string second)) | |
1916 | (message "Password not repeated accurately; please start over") | |
1917 | (sit-for 1)))) | |
1918 | success) | |
1919 | (let ((pass nil) | |
870560eb RS |
1920 | ;; Copy it so that add-text-properties won't modify |
1921 | ;; the object that was passed in by the caller. | |
1922 | (prompt (copy-sequence prompt)) | |
266725f1 SJ |
1923 | (c 0) |
1924 | (echo-keystrokes 0) | |
7c447c3f | 1925 | (cursor-in-echo-area t) |
d4a263ba CY |
1926 | (message-log-max nil) |
1927 | (stop-keys (list 'return ?\r ?\n ?\e)) | |
1928 | (rubout-keys (list 'backspace ?\b ?\177))) | |
a4b1de6e EZ |
1929 | (add-text-properties 0 (length prompt) |
1930 | minibuffer-prompt-properties prompt) | |
266725f1 SJ |
1931 | (while (progn (message "%s%s" |
1932 | prompt | |
1933 | (make-string (length pass) ?.)) | |
4fd15622 | 1934 | (setq c (read-key)) |
d4a263ba | 1935 | (not (memq c stop-keys))) |
266725f1 | 1936 | (clear-this-command-keys) |
d4a263ba CY |
1937 | (cond ((memq c rubout-keys) ; rubout |
1938 | (when (> (length pass) 0) | |
1939 | (let ((new-pass (substring pass 0 -1))) | |
1940 | (and (arrayp pass) (clear-string pass)) | |
1941 | (setq pass new-pass)))) | |
4fd15622 | 1942 | ((eq c ?\C-g) (keyboard-quit)) |
d4a263ba CY |
1943 | ((not (numberp c))) |
1944 | ((= c ?\C-u) ; kill line | |
08640de5 CY |
1945 | (and (arrayp pass) (clear-string pass)) |
1946 | (setq pass "")) | |
1947 | ((= c ?\C-y) ; yank | |
1948 | (let* ((str (condition-case nil | |
1949 | (current-kill 0) | |
1950 | (error nil))) | |
1951 | new-pass) | |
1952 | (when str | |
1953 | (setq new-pass | |
1954 | (concat pass | |
1955 | (substring-no-properties str))) | |
1956 | (and (arrayp pass) (clear-string pass)) | |
1957 | (setq c ?\0) | |
1958 | (setq pass new-pass)))) | |
d4a263ba | 1959 | ((characterp c) ; insert char |
08640de5 CY |
1960 | (let* ((new-char (char-to-string c)) |
1961 | (new-pass (concat pass new-char))) | |
1962 | (and (arrayp pass) (clear-string pass)) | |
1963 | (clear-string new-char) | |
1964 | (setq c ?\0) | |
08640de5 | 1965 | (setq pass new-pass))))) |
266725f1 SJ |
1966 | (message nil) |
1967 | (or pass default ""))))) | |
1968 | ||
6b61353c KH |
1969 | ;; This should be used by `call-interactively' for `n' specs. |
1970 | (defun read-number (prompt &optional default) | |
3238cde3 RS |
1971 | "Read a numeric value in the minibuffer, prompting with PROMPT. |
1972 | DEFAULT specifies a default value to return if the user just types RET. | |
1973 | The value of DEFAULT is inserted into PROMPT." | |
6b61353c KH |
1974 | (let ((n nil)) |
1975 | (when default | |
1976 | (setq prompt | |
2d14d61e MB |
1977 | (if (string-match "\\(\\):[ \t]*\\'" prompt) |
1978 | (replace-match (format " (default %s)" default) t t prompt 1) | |
1979 | (replace-regexp-in-string "[ \t]*\\'" | |
1980 | (format " (default %s) " default) | |
f8cf33b1 | 1981 | prompt t t)))) |
6b61353c KH |
1982 | (while |
1983 | (progn | |
1984 | (let ((str (read-from-minibuffer prompt nil nil nil nil | |
c7863346 SM |
1985 | (and default |
1986 | (number-to-string default))))) | |
219f06f7 RS |
1987 | (condition-case nil |
1988 | (setq n (cond | |
1989 | ((zerop (length str)) default) | |
1990 | ((stringp str) (read str)))) | |
1991 | (error nil))) | |
6b61353c KH |
1992 | (unless (numberp n) |
1993 | (message "Please enter a number.") | |
1994 | (sit-for 1) | |
1995 | t))) | |
1996 | n)) | |
0369eb85 | 1997 | |
3ef01959 CY |
1998 | (defun read-char-choice (prompt chars &optional inhibit-keyboard-quit) |
1999 | "Read and return one of CHARS, prompting for PROMPT. | |
2000 | Any input that is not one of CHARS is ignored. | |
2001 | ||
2002 | If optional argument INHIBIT-KEYBOARD-QUIT is non-nil, ignore | |
2003 | keyboard-quit events while waiting for a valid input." | |
2004 | (unless (consp chars) | |
2005 | (error "Called `read-char-choice' without valid char choices")) | |
2006 | (let ((cursor-in-echo-area t) | |
2007 | (executing-kbd-macro executing-kbd-macro) | |
2008 | char done) | |
2009 | (while (not done) | |
2010 | (unless (get-text-property 0 'face prompt) | |
2011 | (setq prompt (propertize prompt 'face 'minibuffer-prompt))) | |
2012 | (setq char (let ((inhibit-quit inhibit-keyboard-quit)) | |
973f1f2a | 2013 | (read-key prompt))) |
3ef01959 CY |
2014 | (cond |
2015 | ((not (numberp char))) | |
2016 | ((memq char chars) | |
2017 | (setq done t)) | |
2018 | ((and executing-kbd-macro (= char -1)) | |
2019 | ;; read-event returns -1 if we are in a kbd macro and | |
2020 | ;; there are no more events in the macro. Attempt to | |
2021 | ;; get an event interactively. | |
2022 | (setq executing-kbd-macro nil)))) | |
2023 | ;; Display the question with the answer. | |
2024 | (message "%s%s" prompt (char-to-string char)) | |
2025 | char)) | |
2026 | ||
0369eb85 CY |
2027 | (defun sit-for (seconds &optional nodisp obsolete) |
2028 | "Perform redisplay, then wait for SECONDS seconds or until input is available. | |
2029 | SECONDS may be a floating-point value. | |
2030 | \(On operating systems that do not support waiting for fractions of a | |
2031 | second, floating-point values are rounded down to the nearest integer.) | |
2032 | ||
2033 | If optional arg NODISP is t, don't redisplay, just wait for input. | |
2034 | Redisplay does not happen if input is available before it starts. | |
0369eb85 CY |
2035 | |
2036 | Value is t if waited the full time with no input arriving, and nil otherwise. | |
2037 | ||
d8120806 | 2038 | An obsolete, but still supported form is |
0369eb85 | 2039 | \(sit-for SECONDS &optional MILLISECONDS NODISP) |
d8120806 | 2040 | where the optional arg MILLISECONDS specifies an additional wait period, |
0369eb85 | 2041 | in milliseconds; this was useful when Emacs was built without |
fd6c5134 | 2042 | floating point support." |
000b06df GM |
2043 | (if (numberp nodisp) |
2044 | (setq seconds (+ seconds (* 1e-3 nodisp)) | |
2045 | nodisp obsolete) | |
2046 | (if obsolete (setq nodisp obsolete))) | |
790e0ef7 KS |
2047 | (cond |
2048 | (noninteractive | |
2049 | (sleep-for seconds) | |
2050 | t) | |
2051 | ((input-pending-p) | |
2052 | nil) | |
2053 | ((<= seconds 0) | |
2054 | (or nodisp (redisplay))) | |
2055 | (t | |
2056 | (or nodisp (redisplay)) | |
2057 | (let ((read (read-event nil nil seconds))) | |
2058 | (or (null read) | |
fb1a5d8a KS |
2059 | (progn |
2060 | ;; If last command was a prefix arg, e.g. C-u, push this event onto | |
2061 | ;; unread-command-events as (t . EVENT) so it will be added to | |
2062 | ;; this-command-keys by read-key-sequence. | |
2063 | (if (eq overriding-terminal-local-map universal-argument-map) | |
2064 | (setq read (cons t read))) | |
2065 | (push read unread-command-events) | |
2066 | nil)))))) | |
f3a30a50 | 2067 | (set-advertised-calling-convention 'sit-for '(seconds &optional nodisp) "22.1") |
8c51d2a2 | 2068 | |
9aea757b | 2069 | (defun y-or-n-p (prompt) |
8c51d2a2 | 2070 | "Ask user a \"y or n\" question. Return t if answer is \"y\". |
9aea757b CY |
2071 | PROMPT is the string to display to ask the question. It should |
2072 | end in a space; `y-or-n-p' adds \"(y or n) \" to it. | |
3d91e302 | 2073 | |
8c51d2a2 CY |
2074 | No confirmation of the answer is requested; a single character is enough. |
2075 | Also accepts Space to mean yes, or Delete to mean no. \(Actually, it uses | |
2076 | the bindings in `query-replace-map'; see the documentation of that variable | |
2077 | for more information. In this case, the useful bindings are `act', `skip', | |
2078 | `recenter', and `quit'.\) | |
2079 | ||
2080 | Under a windowing system a dialog box will be used if `last-nonmenu-event' | |
2081 | is nil and `use-dialog-box' is non-nil." | |
2082 | ;; ¡Beware! when I tried to edebug this code, Emacs got into a weird state | |
2083 | ;; where all the keys were unbound (i.e. it somehow got triggered | |
2084 | ;; within read-key, apparently). I had to kill it. | |
2085 | (let ((answer 'recenter)) | |
2086 | (if (and (display-popup-menus-p) | |
2087 | (listp last-nonmenu-event) | |
2088 | use-dialog-box) | |
2089 | (setq answer | |
2090 | (x-popup-dialog t `(,prompt ("yes" . act) ("No" . skip)))) | |
9aea757b | 2091 | (setq prompt (concat prompt |
8c51d2a2 CY |
2092 | (if (eq ?\s (aref prompt (1- (length prompt)))) |
2093 | "" " ") | |
2094 | "(y or n) ")) | |
2095 | (while | |
2096 | (let* ((key | |
2097 | (let ((cursor-in-echo-area t)) | |
2098 | (when minibuffer-auto-raise | |
2099 | (raise-frame (window-frame (minibuffer-window)))) | |
2100 | (read-key (propertize (if (eq answer 'recenter) | |
2101 | prompt | |
2102 | (concat "Please answer y or n. " | |
2103 | prompt)) | |
2104 | 'face 'minibuffer-prompt))))) | |
2105 | (setq answer (lookup-key query-replace-map (vector key) t)) | |
2106 | (cond | |
2107 | ((memq answer '(skip act)) nil) | |
2108 | ((eq answer 'recenter) (recenter) t) | |
2109 | ((memq answer '(exit-prefix quit)) (signal 'quit nil) t) | |
2110 | (t t))) | |
2111 | (ding) | |
2112 | (discard-input))) | |
2113 | (let ((ret (eq answer 'act))) | |
2114 | (unless noninteractive | |
2115 | (message "%s %s" prompt (if ret "y" "n"))) | |
2116 | ret))) | |
2117 | ||
e0e4cb7a | 2118 | \f |
2493767e RS |
2119 | ;;; Atomic change groups. |
2120 | ||
69cae2d4 RS |
2121 | (defmacro atomic-change-group (&rest body) |
2122 | "Perform BODY as an atomic change group. | |
2123 | This means that if BODY exits abnormally, | |
2124 | all of its changes to the current buffer are undone. | |
b9ab4064 | 2125 | This works regardless of whether undo is enabled in the buffer. |
69cae2d4 RS |
2126 | |
2127 | This mechanism is transparent to ordinary use of undo; | |
2128 | if undo is enabled in the buffer and BODY succeeds, the | |
2129 | user can undo the change normally." | |
6273dc68 | 2130 | (declare (indent 0) (debug t)) |
69cae2d4 RS |
2131 | (let ((handle (make-symbol "--change-group-handle--")) |
2132 | (success (make-symbol "--change-group-success--"))) | |
2133 | `(let ((,handle (prepare-change-group)) | |
cf191706 RS |
2134 | ;; Don't truncate any undo data in the middle of this. |
2135 | (undo-outer-limit nil) | |
2136 | (undo-limit most-positive-fixnum) | |
2137 | (undo-strong-limit most-positive-fixnum) | |
69cae2d4 RS |
2138 | (,success nil)) |
2139 | (unwind-protect | |
2140 | (progn | |
2141 | ;; This is inside the unwind-protect because | |
2142 | ;; it enables undo if that was disabled; we need | |
2143 | ;; to make sure that it gets disabled again. | |
2144 | (activate-change-group ,handle) | |
2145 | ,@body | |
2146 | (setq ,success t)) | |
2147 | ;; Either of these functions will disable undo | |
2148 | ;; if it was disabled before. | |
2149 | (if ,success | |
2150 | (accept-change-group ,handle) | |
2151 | (cancel-change-group ,handle)))))) | |
2152 | ||
62ea1306 | 2153 | (defun prepare-change-group (&optional buffer) |
69cae2d4 | 2154 | "Return a handle for the current buffer's state, for a change group. |
62ea1306 | 2155 | If you specify BUFFER, make a handle for BUFFER's state instead. |
69cae2d4 RS |
2156 | |
2157 | Pass the handle to `activate-change-group' afterward to initiate | |
2158 | the actual changes of the change group. | |
2159 | ||
2160 | To finish the change group, call either `accept-change-group' or | |
2161 | `cancel-change-group' passing the same handle as argument. Call | |
2162 | `accept-change-group' to accept the changes in the group as final; | |
2163 | call `cancel-change-group' to undo them all. You should use | |
2164 | `unwind-protect' to make sure the group is always finished. The call | |
2165 | to `activate-change-group' should be inside the `unwind-protect'. | |
2166 | Once you finish the group, don't use the handle again--don't try to | |
2167 | finish the same group twice. For a simple example of correct use, see | |
2168 | the source code of `atomic-change-group'. | |
2169 | ||
2170 | The handle records only the specified buffer. To make a multibuffer | |
2171 | change group, call this function once for each buffer you want to | |
2172 | cover, then use `nconc' to combine the returned values, like this: | |
2173 | ||
2174 | (nconc (prepare-change-group buffer-1) | |
2175 | (prepare-change-group buffer-2)) | |
2176 | ||
2177 | You can then activate that multibuffer change group with a single | |
2178 | call to `activate-change-group' and finish it with a single call | |
2179 | to `accept-change-group' or `cancel-change-group'." | |
2180 | ||
62ea1306 RS |
2181 | (if buffer |
2182 | (list (cons buffer (with-current-buffer buffer buffer-undo-list))) | |
2183 | (list (cons (current-buffer) buffer-undo-list)))) | |
69cae2d4 RS |
2184 | |
2185 | (defun activate-change-group (handle) | |
2186 | "Activate a change group made with `prepare-change-group' (which see)." | |
2187 | (dolist (elt handle) | |
2188 | (with-current-buffer (car elt) | |
2189 | (if (eq buffer-undo-list t) | |
2190 | (setq buffer-undo-list nil))))) | |
2191 | ||
2192 | (defun accept-change-group (handle) | |
2193 | "Finish a change group made with `prepare-change-group' (which see). | |
2194 | This finishes the change group by accepting its changes as final." | |
2195 | (dolist (elt handle) | |
2196 | (with-current-buffer (car elt) | |
2197 | (if (eq elt t) | |
2198 | (setq buffer-undo-list t))))) | |
2199 | ||
2200 | (defun cancel-change-group (handle) | |
2201 | "Finish a change group made with `prepare-change-group' (which see). | |
2202 | This finishes the change group by reverting all of its changes." | |
2203 | (dolist (elt handle) | |
2204 | (with-current-buffer (car elt) | |
2205 | (setq elt (cdr elt)) | |
d21cba62 MR |
2206 | (save-restriction |
2207 | ;; Widen buffer temporarily so if the buffer was narrowed within | |
2208 | ;; the body of `atomic-change-group' all changes can be undone. | |
2209 | (widen) | |
2210 | (let ((old-car | |
2211 | (if (consp elt) (car elt))) | |
2212 | (old-cdr | |
2213 | (if (consp elt) (cdr elt)))) | |
2214 | ;; Temporarily truncate the undo log at ELT. | |
2215 | (when (consp elt) | |
2216 | (setcar elt nil) (setcdr elt nil)) | |
2217 | (unless (eq last-command 'undo) (undo-start)) | |
2218 | ;; Make sure there's no confusion. | |
2219 | (when (and (consp elt) (not (eq elt (last pending-undo-list)))) | |
2220 | (error "Undoing to some unrelated state")) | |
2221 | ;; Undo it all. | |
2222 | (save-excursion | |
2223 | (while (listp pending-undo-list) (undo-more 1))) | |
2224 | ;; Reset the modified cons cell ELT to its original content. | |
2225 | (when (consp elt) | |
2226 | (setcar elt old-car) | |
2227 | (setcdr elt old-cdr)) | |
2228 | ;; Revert the undo info to what it was when we grabbed the state. | |
2229 | (setq buffer-undo-list elt)))))) | |
69cae2d4 | 2230 | \f |
c4f484f2 RS |
2231 | ;;;; Display-related functions. |
2232 | ||
a9d956be RS |
2233 | ;; For compatibility. |
2234 | (defalias 'redraw-modeline 'force-mode-line-update) | |
2235 | ||
9a5336ae | 2236 | (defun force-mode-line-update (&optional all) |
6b61353c KH |
2237 | "Force redisplay of the current buffer's mode line and header line. |
2238 | With optional non-nil ALL, force redisplay of all mode lines and | |
2239 | header lines. This function also forces recomputation of the | |
2240 | menu bar menus and the frame title." | |
03a74b84 | 2241 | (if all (with-current-buffer (other-buffer))) |
9a5336ae JB |
2242 | (set-buffer-modified-p (buffer-modified-p))) |
2243 | ||
aa3b4ded | 2244 | (defun momentary-string-display (string pos &optional exit-char message) |
be9b65ac | 2245 | "Momentarily display STRING in the buffer at POS. |
12092fb3 | 2246 | Display remains until next event is input. |
dbf284be | 2247 | If POS is a marker, only its position is used; its buffer is ignored. |
12092fb3 EZ |
2248 | Optional third arg EXIT-CHAR can be a character, event or event |
2249 | description list. EXIT-CHAR defaults to SPC. If the input is | |
2250 | EXIT-CHAR it is swallowed; otherwise it is then available as | |
2251 | input (as a command if nothing else). | |
be9b65ac DL |
2252 | Display MESSAGE (optional fourth arg) in the echo area. |
2253 | If MESSAGE is nil, instructions to type EXIT-CHAR are displayed there." | |
b754307b | 2254 | (or exit-char (setq exit-char ?\s)) |
f70c4736 | 2255 | (let ((ol (make-overlay pos pos)) |
bc91aee9 | 2256 | (str (copy-sequence string))) |
be9b65ac | 2257 | (unwind-protect |
f70c4736 SM |
2258 | (progn |
2259 | (save-excursion | |
bc91aee9 | 2260 | (overlay-put ol 'after-string str) |
f70c4736 SM |
2261 | (goto-char pos) |
2262 | ;; To avoid trouble with out-of-bounds position | |
2263 | (setq pos (point)) | |
bc91aee9 | 2264 | ;; If the string end is off screen, recenter now. |
f70c4736 SM |
2265 | (if (<= (window-end nil t) pos) |
2266 | (recenter (/ (window-height) 2)))) | |
2267 | (message (or message "Type %s to continue editing.") | |
2268 | (single-key-description exit-char)) | |
fe40dc63 JB |
2269 | (let ((event (read-event))) |
2270 | ;; `exit-char' can be an event, or an event description list. | |
2271 | (or (eq event exit-char) | |
2272 | (eq event (event-convert-list exit-char)) | |
2273 | (setq unread-command-events (list event))))) | |
f70c4736 | 2274 | (delete-overlay ol)))) |
be9b65ac | 2275 | |
9a5336ae | 2276 | \f |
aa3b4ded SM |
2277 | ;;;; Overlay operations |
2278 | ||
2279 | (defun copy-overlay (o) | |
2280 | "Return a copy of overlay O." | |
48b1e7cf SM |
2281 | (let ((o1 (if (overlay-buffer o) |
2282 | (make-overlay (overlay-start o) (overlay-end o) | |
2283 | ;; FIXME: there's no easy way to find the | |
2284 | ;; insertion-type of the two markers. | |
2285 | (overlay-buffer o)) | |
2286 | (let ((o1 (make-overlay (point-min) (point-min)))) | |
2287 | (delete-overlay o1) | |
28f0b072 | 2288 | o1))) |
aa3b4ded SM |
2289 | (props (overlay-properties o))) |
2290 | (while props | |
2291 | (overlay-put o1 (pop props) (pop props))) | |
2292 | o1)) | |
2293 | ||
f24485f1 | 2294 | (defun remove-overlays (&optional beg end name val) |
aa3b4ded | 2295 | "Clear BEG and END of overlays whose property NAME has value VAL. |
cba61075 JB |
2296 | Overlays might be moved and/or split. |
2297 | BEG and END default respectively to the beginning and end of buffer." | |
d6f5ac10 | 2298 | ;; This speeds up the loops over overlays. |
f24485f1 MY |
2299 | (unless beg (setq beg (point-min))) |
2300 | (unless end (setq end (point-max))) | |
ee6bb693 | 2301 | (overlay-recenter end) |
aa3b4ded SM |
2302 | (if (< end beg) |
2303 | (setq beg (prog1 end (setq end beg)))) | |
2304 | (save-excursion | |
2305 | (dolist (o (overlays-in beg end)) | |
2306 | (when (eq (overlay-get o name) val) | |
2307 | ;; Either push this overlay outside beg...end | |
2308 | ;; or split it to exclude beg...end | |
2309 | ;; or delete it entirely (if it is contained in beg...end). | |
2310 | (if (< (overlay-start o) beg) | |
2311 | (if (> (overlay-end o) end) | |
2312 | (progn | |
2313 | (move-overlay (copy-overlay o) | |
2314 | (overlay-start o) beg) | |
2315 | (move-overlay o end (overlay-end o))) | |
2316 | (move-overlay o (overlay-start o) beg)) | |
2317 | (if (> (overlay-end o) end) | |
2318 | (move-overlay o end (overlay-end o)) | |
2319 | (delete-overlay o))))))) | |
c5802acf | 2320 | \f |
9a5336ae JB |
2321 | ;;;; Miscellanea. |
2322 | ||
4fb17037 RS |
2323 | (defvar suspend-hook nil |
2324 | "Normal hook run by `suspend-emacs', before suspending.") | |
2325 | ||
2326 | (defvar suspend-resume-hook nil | |
2327 | "Normal hook run by `suspend-emacs', after Emacs is continued.") | |
2328 | ||
784bc7cd RS |
2329 | (defvar temp-buffer-show-hook nil |
2330 | "Normal hook run by `with-output-to-temp-buffer' after displaying the buffer. | |
2331 | When the hook runs, the temporary buffer is current, and the window it | |
5247a8e6 | 2332 | was displayed in is selected.") |
784bc7cd RS |
2333 | |
2334 | (defvar temp-buffer-setup-hook nil | |
2335 | "Normal hook run by `with-output-to-temp-buffer' at the start. | |
2336 | When the hook runs, the temporary buffer is current. | |
2337 | This hook is normally set up with a function to put the buffer in Help | |
2338 | mode.") | |
2339 | ||
448b61c9 RS |
2340 | ;; Avoid compiler warnings about this variable, |
2341 | ;; which has a special meaning on certain system types. | |
2342 | (defvar buffer-file-type nil | |
2343 | "Non-nil if the visited file is a binary file. | |
2344 | This variable is meaningful on MS-DOG and Windows NT. | |
2345 | On those systems, it is automatically local in every buffer. | |
2346 | On other systems, this variable is normally always nil.") | |
28ac46f8 JPW |
2347 | |
2348 | ;; The `assert' macro from the cl package signals | |
2349 | ;; `cl-assertion-failed' at runtime so always define it. | |
2350 | (put 'cl-assertion-failed 'error-conditions '(error)) | |
6bdad9ae | 2351 | (put 'cl-assertion-failed 'error-message (purecopy "Assertion failed")) |
28ac46f8 | 2352 | |
d8869c65 CY |
2353 | (defconst user-emacs-directory |
2354 | (if (eq system-type 'ms-dos) | |
2355 | ;; MS-DOS cannot have initial dot. | |
2356 | "~/_emacs.d/" | |
2357 | "~/.emacs.d/") | |
2358 | "Directory beneath which additional per-user Emacs-specific files are placed. | |
2359 | Various programs in Emacs store information in this directory. | |
d6c180c4 JB |
2360 | Note that this should end with a directory separator. |
2361 | See also `locate-user-emacs-file'.") | |
2362 | ||
2363 | (defun locate-user-emacs-file (new-name &optional old-name) | |
2364 | "Return an absolute per-user Emacs-specific file name. | |
2365 | If OLD-NAME is non-nil and ~/OLD-NAME exists, return ~/OLD-NAME. | |
2366 | Else return NEW-NAME in `user-emacs-directory', creating the | |
2367 | directory if it does not exist." | |
2368 | (convert-standard-filename | |
2369 | (let* ((home (concat "~" (or init-file-user ""))) | |
2370 | (at-home (and old-name (expand-file-name old-name home)))) | |
2371 | (if (and at-home (file-readable-p at-home)) | |
2372 | at-home | |
2bea2795 JB |
2373 | ;; Make sure `user-emacs-directory' exists, |
2374 | ;; unless we're in batch mode or dumping Emacs | |
2375 | (or noninteractive | |
2376 | purify-flag | |
b024d9f0 MD |
2377 | (file-accessible-directory-p |
2378 | (directory-file-name user-emacs-directory)) | |
2379 | (let ((umask (default-file-modes))) | |
2380 | (unwind-protect | |
2381 | (progn | |
2382 | (set-default-file-modes ?\700) | |
2383 | (make-directory user-emacs-directory)) | |
2384 | (set-default-file-modes umask)))) | |
03a74b84 SM |
2385 | (abbreviate-file-name |
2386 | (expand-file-name new-name user-emacs-directory)))))) | |
c4f484f2 RS |
2387 | \f |
2388 | ;;;; Misc. useful functions. | |
448b61c9 | 2389 | |
c4f484f2 RS |
2390 | (defun find-tag-default () |
2391 | "Determine default tag to search for, based on text at point. | |
2392 | If there is no plausible default, return nil." | |
9db3bfae MR |
2393 | (let (from to bound) |
2394 | (when (or (progn | |
2395 | ;; Look at text around `point'. | |
2396 | (save-excursion | |
2397 | (skip-syntax-backward "w_") (setq from (point))) | |
2398 | (save-excursion | |
2399 | (skip-syntax-forward "w_") (setq to (point))) | |
2400 | (> to from)) | |
2401 | ;; Look between `line-beginning-position' and `point'. | |
2402 | (save-excursion | |
2403 | (and (setq bound (line-beginning-position)) | |
2404 | (skip-syntax-backward "^w_" bound) | |
2405 | (> (setq to (point)) bound) | |
2406 | (skip-syntax-backward "w_") | |
2407 | (setq from (point)))) | |
2408 | ;; Look between `point' and `line-end-position'. | |
2409 | (save-excursion | |
2410 | (and (setq bound (line-end-position)) | |
2411 | (skip-syntax-forward "^w_" bound) | |
2412 | (< (setq from (point)) bound) | |
2413 | (skip-syntax-forward "w_") | |
2414 | (setq to (point))))) | |
2415 | (buffer-substring-no-properties from to)))) | |
a860d25f | 2416 | |
c4f484f2 RS |
2417 | (defun play-sound (sound) |
2418 | "SOUND is a list of the form `(sound KEYWORD VALUE...)'. | |
2419 | The following keywords are recognized: | |
9a5336ae | 2420 | |
c4f484f2 RS |
2421 | :file FILE - read sound data from FILE. If FILE isn't an |
2422 | absolute file name, it is searched in `data-directory'. | |
9a5336ae | 2423 | |
c4f484f2 RS |
2424 | :data DATA - read sound data from string DATA. |
2425 | ||
2426 | Exactly one of :file or :data must be present. | |
2427 | ||
2428 | :volume VOL - set volume to VOL. VOL must an integer in the | |
2429 | range 0..100 or a float in the range 0..1.0. If not specified, | |
2430 | don't change the volume setting of the sound device. | |
9a5336ae | 2431 | |
c4f484f2 | 2432 | :device DEVICE - play sound on DEVICE. If not specified, |
d7f90d6c JB |
2433 | a system-dependent default device name is used. |
2434 | ||
2435 | Note: :data and :device are currently not supported on Windows." | |
c4f484f2 RS |
2436 | (if (fboundp 'play-sound-internal) |
2437 | (play-sound-internal sound) | |
2438 | (error "This Emacs binary lacks sound support"))) | |
9a5336ae | 2439 | |
0ef97535 GM |
2440 | (declare-function w32-shell-dos-semantics "w32-fns" nil) |
2441 | ||
c4f484f2 | 2442 | (defun shell-quote-argument (argument) |
d7f90d6c | 2443 | "Quote ARGUMENT for passing as argument to an inferior shell." |
4bbf6b41 JR |
2444 | (if (or (eq system-type 'ms-dos) |
2445 | (and (eq system-type 'windows-nt) (w32-shell-dos-semantics))) | |
c4f484f2 RS |
2446 | ;; Quote using double quotes, but escape any existing quotes in |
2447 | ;; the argument with backslashes. | |
2448 | (let ((result "") | |
2449 | (start 0) | |
2450 | end) | |
2451 | (if (or (null (string-match "[^\"]" argument)) | |
2452 | (< (match-end 0) (length argument))) | |
2453 | (while (string-match "[\"]" argument start) | |
2454 | (setq end (match-beginning 0) | |
2455 | result (concat result (substring argument start end) | |
2456 | "\\" (substring argument end (1+ end))) | |
2457 | start (1+ end)))) | |
2458 | (concat "\"" result (substring argument start) "\"")) | |
4bbf6b41 JR |
2459 | (if (equal argument "") |
2460 | "''" | |
2461 | ;; Quote everything except POSIX filename characters. | |
2462 | ;; This should be safe enough even for really weird shells. | |
d5e632d8 SM |
2463 | (replace-regexp-in-string "\n" "'\n'" |
2464 | (replace-regexp-in-string "[^-0-9a-zA-Z_./\n]" "\\\\\\&" argument))))) | |
3e457225 RS |
2465 | |
2466 | (defun string-or-null-p (object) | |
2467 | "Return t if OBJECT is a string or nil. | |
2468 | Otherwise, return nil." | |
2469 | (or (stringp object) (null object))) | |
2470 | ||
26715e1b | 2471 | (defun booleanp (object) |
ac6ca7ba KR |
2472 | "Return t if OBJECT is one of the two canonical boolean values: t or nil. |
2473 | Otherwise, return nil." | |
2474 | (and (memq object '(nil t)) t)) | |
26715e1b | 2475 | |
1627b55f | 2476 | (defun field-at-pos (pos) |
d7f90d6c | 2477 | "Return the field at position POS, taking stickiness etc into account." |
1ecaae6c NR |
2478 | (let ((raw-field (get-char-property (field-beginning pos) 'field))) |
2479 | (if (eq raw-field 'boundary) | |
2480 | (get-char-property (1- (field-end pos)) 'field) | |
2481 | raw-field))) | |
2482 | ||
c4f484f2 RS |
2483 | \f |
2484 | ;;;; Support for yanking and text properties. | |
9a5336ae | 2485 | |
2493767e RS |
2486 | (defvar yank-excluded-properties) |
2487 | ||
8ed59ad5 KS |
2488 | (defun remove-yank-excluded-properties (start end) |
2489 | "Remove `yank-excluded-properties' between START and END positions. | |
2490 | Replaces `category' properties with their defined properties." | |
2491 | (let ((inhibit-read-only t)) | |
0f00e948 EZ |
2492 | ;; Replace any `category' property with the properties it stands |
2493 | ;; for. This is to remove `mouse-face' properties that are placed | |
2494 | ;; on categories in *Help* buffers' buttons. See | |
2495 | ;; http://lists.gnu.org/archive/html/emacs-devel/2002-04/msg00648.html | |
2496 | ;; for the details. | |
8ed59ad5 KS |
2497 | (unless (memq yank-excluded-properties '(t nil)) |
2498 | (save-excursion | |
2499 | (goto-char start) | |
2500 | (while (< (point) end) | |
2501 | (let ((cat (get-text-property (point) 'category)) | |
2502 | run-end) | |
8ed59ad5 KS |
2503 | (setq run-end |
2504 | (next-single-property-change (point) 'category nil end)) | |
ebaa3349 RS |
2505 | (when cat |
2506 | (let (run-end2 original) | |
2507 | (remove-list-of-text-properties (point) run-end '(category)) | |
2508 | (while (< (point) run-end) | |
2509 | (setq run-end2 (next-property-change (point) nil run-end)) | |
2510 | (setq original (text-properties-at (point))) | |
2511 | (set-text-properties (point) run-end2 (symbol-plist cat)) | |
2512 | (add-text-properties (point) run-end2 original) | |
2513 | (goto-char run-end2)))) | |
2514 | (goto-char run-end))))) | |
8ed59ad5 KS |
2515 | (if (eq yank-excluded-properties t) |
2516 | (set-text-properties start end nil) | |
ebaa3349 | 2517 | (remove-list-of-text-properties start end yank-excluded-properties)))) |
8ed59ad5 | 2518 | |
e0e80ec9 KS |
2519 | (defvar yank-undo-function) |
2520 | ||
2521 | (defun insert-for-yank (string) | |
3fa173b4 | 2522 | "Call `insert-for-yank-1' repetitively for each `yank-handler' segment. |
6b61353c KH |
2523 | |
2524 | See `insert-for-yank-1' for more details." | |
2525 | (let (to) | |
2526 | (while (setq to (next-single-property-change 0 'yank-handler string)) | |
2527 | (insert-for-yank-1 (substring string 0 to)) | |
2528 | (setq string (substring string to)))) | |
2529 | (insert-for-yank-1 string)) | |
2530 | ||
2531 | (defun insert-for-yank-1 (string) | |
e0e80ec9 | 2532 | "Insert STRING at point, stripping some text properties. |
6b61353c | 2533 | |
e0e80ec9 KS |
2534 | Strip text properties from the inserted text according to |
2535 | `yank-excluded-properties'. Otherwise just like (insert STRING). | |
2536 | ||
374d3fe7 | 2537 | If STRING has a non-nil `yank-handler' property on the first character, |
cc295a82 | 2538 | the normal insert behavior is modified in various ways. The value of |
fbe13428 | 2539 | the yank-handler property must be a list with one to four elements |
9dd10e25 | 2540 | with the following format: (FUNCTION PARAM NOEXCLUDE UNDO). |
e0e80ec9 KS |
2541 | When FUNCTION is present and non-nil, it is called instead of `insert' |
2542 | to insert the string. FUNCTION takes one argument--the object to insert. | |
2543 | If PARAM is present and non-nil, it replaces STRING as the object | |
2544 | passed to FUNCTION (or `insert'); for example, if FUNCTION is | |
2545 | `yank-rectangle', PARAM may be a list of strings to insert as a | |
2546 | rectangle. | |
2547 | If NOEXCLUDE is present and non-nil, the normal removal of the | |
5612fd08 | 2548 | `yank-excluded-properties' is not performed; instead FUNCTION is |
e0e80ec9 KS |
2549 | responsible for removing those properties. This may be necessary |
2550 | if FUNCTION adjusts point before or after inserting the object. | |
2551 | If UNDO is present and non-nil, it is a function that will be called | |
2552 | by `yank-pop' to undo the insertion of the current object. It is | |
f1180544 | 2553 | called with two arguments, the start and end of the current region. |
9dd10e25 | 2554 | FUNCTION may set `yank-undo-function' to override the UNDO value." |
57596fb6 KS |
2555 | (let* ((handler (and (stringp string) |
2556 | (get-text-property 0 'yank-handler string))) | |
2557 | (param (or (nth 1 handler) string)) | |
4f0f29aa | 2558 | (opoint (point)) |
029fd82c | 2559 | (inhibit-read-only inhibit-read-only) |
4f0f29aa RS |
2560 | end) |
2561 | ||
57596fb6 KS |
2562 | (setq yank-undo-function t) |
2563 | (if (nth 0 handler) ;; FUNCTION | |
2564 | (funcall (car handler) param) | |
e0e80ec9 | 2565 | (insert param)) |
4f0f29aa RS |
2566 | (setq end (point)) |
2567 | ||
029fd82c CY |
2568 | ;; Prevent read-only properties from interfering with the |
2569 | ;; following text property changes. | |
2570 | (setq inhibit-read-only t) | |
2571 | ||
4f0f29aa RS |
2572 | ;; What should we do with `font-lock-face' properties? |
2573 | (if font-lock-defaults | |
2574 | ;; No, just wipe them. | |
2575 | (remove-list-of-text-properties opoint end '(font-lock-face)) | |
2576 | ;; Convert them to `face'. | |
2577 | (save-excursion | |
2578 | (goto-char opoint) | |
2579 | (while (< (point) end) | |
2580 | (let ((face (get-text-property (point) 'font-lock-face)) | |
2581 | run-end) | |
2582 | (setq run-end | |
2583 | (next-single-property-change (point) 'font-lock-face nil end)) | |
2584 | (when face | |
2585 | (remove-text-properties (point) run-end '(font-lock-face nil)) | |
2586 | (put-text-property (point) run-end 'face face)) | |
2587 | (goto-char run-end))))) | |
2588 | ||
57596fb6 | 2589 | (unless (nth 2 handler) ;; NOEXCLUDE |
e0e80ec9 | 2590 | (remove-yank-excluded-properties opoint (point))) |
631890d8 RS |
2591 | |
2592 | ;; If last inserted char has properties, mark them as rear-nonsticky. | |
2593 | (if (and (> end opoint) | |
2594 | (text-properties-at (1- end))) | |
2595 | (put-text-property (1- end) end 'rear-nonsticky t)) | |
2596 | ||
c8227332 | 2597 | (if (eq yank-undo-function t) ;; not set by FUNCTION |
57596fb6 | 2598 | (setq yank-undo-function (nth 3 handler))) ;; UNDO |
c8227332 | 2599 | (if (nth 4 handler) ;; COMMAND |
57596fb6 | 2600 | (setq this-command (nth 4 handler))))) |
f1180544 | 2601 | |
a478f3e1 JB |
2602 | (defun insert-buffer-substring-no-properties (buffer &optional start end) |
2603 | "Insert before point a substring of BUFFER, without text properties. | |
3b8690f6 | 2604 | BUFFER may be a buffer or a buffer name. |
f8cf33b1 JB |
2605 | Arguments START and END are character positions specifying the substring. |
2606 | They default to the values of (point-min) and (point-max) in BUFFER." | |
3b8690f6 | 2607 | (let ((opoint (point))) |
a478f3e1 | 2608 | (insert-buffer-substring buffer start end) |
3b8690f6 KS |
2609 | (let ((inhibit-read-only t)) |
2610 | (set-text-properties opoint (point) nil)))) | |
2611 | ||
a478f3e1 JB |
2612 | (defun insert-buffer-substring-as-yank (buffer &optional start end) |
2613 | "Insert before point a part of BUFFER, stripping some text properties. | |
2614 | BUFFER may be a buffer or a buffer name. | |
f8cf33b1 JB |
2615 | Arguments START and END are character positions specifying the substring. |
2616 | They default to the values of (point-min) and (point-max) in BUFFER. | |
a478f3e1 JB |
2617 | Strip text properties from the inserted text according to |
2618 | `yank-excluded-properties'." | |
6b61353c KH |
2619 | ;; Since the buffer text should not normally have yank-handler properties, |
2620 | ;; there is no need to handle them here. | |
3b8690f6 | 2621 | (let ((opoint (point))) |
a478f3e1 | 2622 | (insert-buffer-substring buffer start end) |
8ed59ad5 | 2623 | (remove-yank-excluded-properties opoint (point)))) |
3b8690f6 | 2624 | |
2493767e | 2625 | \f |
c4f484f2 | 2626 | ;;;; Synchronous shell commands. |
2493767e | 2627 | |
be9b65ac DL |
2628 | (defun start-process-shell-command (name buffer &rest args) |
2629 | "Start a program in a subprocess. Return the process object for it. | |
be9b65ac | 2630 | NAME is name for process. It is modified if necessary to make it unique. |
54ce7cbf | 2631 | BUFFER is the buffer (or buffer name) to associate with the process. |
be9b65ac DL |
2632 | Process output goes at end of that buffer, unless you specify |
2633 | an output stream or filter function to handle the output. | |
2634 | BUFFER may be also nil, meaning that this process is not associated | |
2635 | with any buffer | |
03a74b84 SM |
2636 | COMMAND is the shell command to run. |
2637 | ||
2638 | An old calling convention accepted any number of arguments after COMMAND, | |
2639 | which were just concatenated to COMMAND. This is still supported but strongly | |
fd6c5134 | 2640 | discouraged." |
b59f6d7a RS |
2641 | ;; We used to use `exec' to replace the shell with the command, |
2642 | ;; but that failed to handle (...) and semicolon, etc. | |
7c2fb837 DN |
2643 | (start-process name buffer shell-file-name shell-command-switch |
2644 | (mapconcat 'identity args " "))) | |
f3ed9aca | 2645 | (set-advertised-calling-convention 'start-process-shell-command |
f3a30a50 | 2646 | '(name buffer command) "23.1") |
f3ed9aca | 2647 | |
a9e11582 MA |
2648 | (defun start-file-process-shell-command (name buffer &rest args) |
2649 | "Start a program in a subprocess. Return the process object for it. | |
fd6c5134 | 2650 | Similar to `start-process-shell-command', but calls `start-file-process'." |
a9e11582 MA |
2651 | (start-file-process |
2652 | name buffer | |
2653 | (if (file-remote-p default-directory) "/bin/sh" shell-file-name) | |
2654 | (if (file-remote-p default-directory) "-c" shell-command-switch) | |
2655 | (mapconcat 'identity args " "))) | |
f3ed9aca | 2656 | (set-advertised-calling-convention 'start-file-process-shell-command |
f3a30a50 | 2657 | '(name buffer command) "23.1") |
a9e11582 | 2658 | |
93aca633 MB |
2659 | (defun call-process-shell-command (command &optional infile buffer display |
2660 | &rest args) | |
2661 | "Execute the shell command COMMAND synchronously in separate process. | |
2662 | The remaining arguments are optional. | |
2663 | The program's input comes from file INFILE (nil means `/dev/null'). | |
2664 | Insert output in BUFFER before point; t means current buffer; | |
2665 | nil for BUFFER means discard it; 0 means discard and don't wait. | |
2666 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, | |
2667 | REAL-BUFFER says what to do with standard output, as above, | |
2668 | while STDERR-FILE says what to do with standard error in the child. | |
2669 | STDERR-FILE may be nil (discard standard error output), | |
2670 | t (mix it with ordinary output), or a file name string. | |
2671 | ||
2672 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
2673 | Remaining arguments are strings passed as additional arguments for COMMAND. | |
2674 | Wildcards and redirection are handled as usual in the shell. | |
2675 | ||
2676 | If BUFFER is 0, `call-process-shell-command' returns immediately with value nil. | |
2677 | Otherwise it waits for COMMAND to terminate and returns a numeric exit | |
2678 | status or a signal description string. | |
2679 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again." | |
7c2fb837 DN |
2680 | ;; We used to use `exec' to replace the shell with the command, |
2681 | ;; but that failed to handle (...) and semicolon, etc. | |
2682 | (call-process shell-file-name | |
2683 | infile buffer display | |
2684 | shell-command-switch | |
2685 | (mapconcat 'identity (cons command args) " "))) | |
a9e11582 MA |
2686 | |
2687 | (defun process-file-shell-command (command &optional infile buffer display | |
2688 | &rest args) | |
2689 | "Process files synchronously in a separate process. | |
2690 | Similar to `call-process-shell-command', but calls `process-file'." | |
2691 | (process-file | |
2692 | (if (file-remote-p default-directory) "/bin/sh" shell-file-name) | |
2693 | infile buffer display | |
2694 | (if (file-remote-p default-directory) "-c" shell-command-switch) | |
2695 | (mapconcat 'identity (cons command args) " "))) | |
a7ed4c2a | 2696 | \f |
c4f484f2 RS |
2697 | ;;;; Lisp macros to do various things temporarily. |
2698 | ||
83f57f49 MR |
2699 | (defmacro with-current-buffer (buffer-or-name &rest body) |
2700 | "Execute the forms in BODY with BUFFER-OR-NAME temporarily current. | |
2701 | BUFFER-OR-NAME must be a buffer or the name of an existing buffer. | |
2702 | The value returned is the value of the last form in BODY. See | |
2703 | also `with-temp-buffer'." | |
d47f7515 SM |
2704 | (declare (indent 1) (debug t)) |
2705 | `(save-current-buffer | |
83f57f49 | 2706 | (set-buffer ,buffer-or-name) |
d47f7515 SM |
2707 | ,@body)) |
2708 | ||
2709 | (defmacro with-selected-window (window &rest body) | |
2710 | "Execute the forms in BODY with WINDOW as the selected window. | |
2711 | The value returned is the value of the last form in BODY. | |
4c6d1e16 | 2712 | |
a5094f72 MR |
2713 | This macro saves and restores the selected window, as well as the |
2714 | selected window of each frame. It does not change the order of | |
2715 | recently selected windows. If the previously selected window of | |
2716 | some frame is no longer live at the end of BODY, that frame's | |
2717 | selected window is left alone. If the selected window is no | |
2718 | longer live, then whatever window is selected at the end of BODY | |
2719 | remains selected. | |
2720 | ||
2721 | This macro uses `save-current-buffer' to save and restore the | |
2722 | current buffer, since otherwise its normal operation could | |
2723 | potentially make a different buffer current. It does not alter | |
2724 | the buffer list ordering." | |
d47f7515 | 2725 | (declare (indent 1) (debug t)) |
4df623c0 RS |
2726 | ;; Most of this code is a copy of save-selected-window. |
2727 | `(let ((save-selected-window-window (selected-window)) | |
3f71ad3a RS |
2728 | ;; It is necessary to save all of these, because calling |
2729 | ;; select-window changes frame-selected-window for whatever | |
2730 | ;; frame that window is in. | |
4df623c0 RS |
2731 | (save-selected-window-alist |
2732 | (mapcar (lambda (frame) (list frame (frame-selected-window frame))) | |
2733 | (frame-list)))) | |
4c6d1e16 RS |
2734 | (save-current-buffer |
2735 | (unwind-protect | |
2736 | (progn (select-window ,window 'norecord) | |
2737 | ,@body) | |
2738 | (dolist (elt save-selected-window-alist) | |
2739 | (and (frame-live-p (car elt)) | |
2740 | (window-live-p (cadr elt)) | |
a5094f72 MR |
2741 | (set-frame-selected-window (car elt) (cadr elt) 'norecord))) |
2742 | (when (window-live-p save-selected-window-window) | |
2743 | (select-window save-selected-window-window 'norecord)))))) | |
a7f284ec | 2744 | |
c3e242d3 KL |
2745 | (defmacro with-selected-frame (frame &rest body) |
2746 | "Execute the forms in BODY with FRAME as the selected frame. | |
2747 | The value returned is the value of the last form in BODY. | |
a5094f72 MR |
2748 | |
2749 | This macro neither changes the order of recently selected windows | |
2750 | nor the buffer list." | |
c3e242d3 | 2751 | (declare (indent 1) (debug t)) |
632210dd KL |
2752 | (let ((old-frame (make-symbol "old-frame")) |
2753 | (old-buffer (make-symbol "old-buffer"))) | |
2754 | `(let ((,old-frame (selected-frame)) | |
2755 | (,old-buffer (current-buffer))) | |
2756 | (unwind-protect | |
a5094f72 | 2757 | (progn (select-frame ,frame 'norecord) |
632210dd | 2758 | ,@body) |
a5094f72 MR |
2759 | (when (frame-live-p ,old-frame) |
2760 | (select-frame ,old-frame 'norecord)) | |
2761 | (when (buffer-live-p ,old-buffer) | |
2762 | (set-buffer ,old-buffer)))))) | |
c3e242d3 | 2763 | |
e5bb8a8c SM |
2764 | (defmacro with-temp-file (file &rest body) |
2765 | "Create a new buffer, evaluate BODY there, and write the buffer to FILE. | |
2766 | The value returned is the value of the last form in BODY. | |
a2fdb55c | 2767 | See also `with-temp-buffer'." |
f291fe60 | 2768 | (declare (indent 1) (debug t)) |
a7ed4c2a | 2769 | (let ((temp-file (make-symbol "temp-file")) |
a2fdb55c EN |
2770 | (temp-buffer (make-symbol "temp-buffer"))) |
2771 | `(let ((,temp-file ,file) | |
2772 | (,temp-buffer | |
2773 | (get-buffer-create (generate-new-buffer-name " *temp file*")))) | |
2774 | (unwind-protect | |
2775 | (prog1 | |
2776 | (with-current-buffer ,temp-buffer | |
e5bb8a8c | 2777 | ,@body) |
a2fdb55c | 2778 | (with-current-buffer ,temp-buffer |
ab1d3835 | 2779 | (write-region nil nil ,temp-file nil 0))) |
a2fdb55c EN |
2780 | (and (buffer-name ,temp-buffer) |
2781 | (kill-buffer ,temp-buffer)))))) | |
2782 | ||
e5bb8a8c | 2783 | (defmacro with-temp-message (message &rest body) |
a600effe | 2784 | "Display MESSAGE temporarily if non-nil while BODY is evaluated. |
e5bb8a8c SM |
2785 | The original message is restored to the echo area after BODY has finished. |
2786 | The value returned is the value of the last form in BODY. | |
a600effe SM |
2787 | MESSAGE is written to the message log buffer if `message-log-max' is non-nil. |
2788 | If MESSAGE is nil, the echo area and message log buffer are unchanged. | |
2789 | Use a MESSAGE of \"\" to temporarily clear the echo area." | |
f291fe60 | 2790 | (declare (debug t) (indent 1)) |
110201c8 SM |
2791 | (let ((current-message (make-symbol "current-message")) |
2792 | (temp-message (make-symbol "with-temp-message"))) | |
2793 | `(let ((,temp-message ,message) | |
2794 | (,current-message)) | |
e5bb8a8c SM |
2795 | (unwind-protect |
2796 | (progn | |
110201c8 SM |
2797 | (when ,temp-message |
2798 | (setq ,current-message (current-message)) | |
aadf7ff3 | 2799 | (message "%s" ,temp-message)) |
e5bb8a8c | 2800 | ,@body) |
cad84646 RS |
2801 | (and ,temp-message |
2802 | (if ,current-message | |
2803 | (message "%s" ,current-message) | |
2804 | (message nil))))))) | |
e5bb8a8c SM |
2805 | |
2806 | (defmacro with-temp-buffer (&rest body) | |
2807 | "Create a temporary buffer, and evaluate BODY there like `progn'. | |
a2fdb55c | 2808 | See also `with-temp-file' and `with-output-to-string'." |
d47f7515 | 2809 | (declare (indent 0) (debug t)) |
a2fdb55c | 2810 | (let ((temp-buffer (make-symbol "temp-buffer"))) |
9166dbf6 | 2811 | `(let ((,temp-buffer (generate-new-buffer " *temp*"))) |
4a5e1832 SM |
2812 | ;; FIXME: kill-buffer can change current-buffer in some odd cases. |
2813 | (with-current-buffer ,temp-buffer | |
2814 | (unwind-protect | |
2815 | (progn ,@body) | |
2816 | (and (buffer-name ,temp-buffer) | |
2817 | (kill-buffer ,temp-buffer))))))) | |
a2fdb55c | 2818 | |
83a5aac5 | 2819 | (defmacro with-silent-modifications (&rest body) |
f291fe60 | 2820 | "Execute BODY, pretending it does not modify the buffer. |
83a5aac5 SM |
2821 | If BODY performs real modifications to the buffer's text, other |
2822 | than cosmetic ones, undo data may become corrupted. | |
2823 | Typically used around modifications of text-properties which do not really | |
2824 | affect the buffer's content." | |
2825 | (declare (debug t) (indent 0)) | |
2826 | (let ((modified (make-symbol "modified"))) | |
2827 | `(let* ((,modified (buffer-modified-p)) | |
2828 | (buffer-undo-list t) | |
2829 | (inhibit-read-only t) | |
2830 | (inhibit-modification-hooks t) | |
2831 | deactivate-mark | |
2832 | ;; Avoid setting and removing file locks and checking | |
2833 | ;; buffer's uptodate-ness w.r.t the underlying file. | |
2834 | buffer-file-name | |
2835 | buffer-file-truename) | |
2836 | (unwind-protect | |
2837 | (progn | |
2838 | ,@body) | |
2839 | (unless ,modified | |
2840 | (restore-buffer-modified-p nil)))))) | |
2841 | ||
5db7925d RS |
2842 | (defmacro with-output-to-string (&rest body) |
2843 | "Execute BODY, return the text it sent to `standard-output', as a string." | |
d47f7515 | 2844 | (declare (indent 0) (debug t)) |
a2fdb55c EN |
2845 | `(let ((standard-output |
2846 | (get-buffer-create (generate-new-buffer-name " *string-output*")))) | |
86ec740e RF |
2847 | (unwind-protect |
2848 | (progn | |
2849 | (let ((standard-output standard-output)) | |
2850 | ,@body) | |
2851 | (with-current-buffer standard-output | |
2852 | (buffer-string))) | |
2853 | (kill-buffer standard-output)))) | |
2ec9c94e | 2854 | |
0764e16f | 2855 | (defmacro with-local-quit (&rest body) |
53a7160c | 2856 | "Execute BODY, allowing quits to terminate BODY but not escape further. |
b9308c61 | 2857 | When a quit terminates BODY, `with-local-quit' returns nil but |
60f7e8b6 RS |
2858 | requests another quit. That quit will be processed as soon as quitting |
2859 | is allowed once again. (Immediately, if `inhibit-quit' is nil.)" | |
12320833 | 2860 | (declare (debug t) (indent 0)) |
0764e16f SM |
2861 | `(condition-case nil |
2862 | (let ((inhibit-quit nil)) | |
2863 | ,@body) | |
113fe928 RS |
2864 | (quit (setq quit-flag t) |
2865 | ;; This call is to give a chance to handle quit-flag | |
2866 | ;; in case inhibit-quit is nil. | |
2867 | ;; Without this, it will not be handled until the next function | |
2868 | ;; call, and that might allow it to exit thru a condition-case | |
2869 | ;; that intends to handle the quit signal next time. | |
2870 | (eval '(ignore nil))))) | |
0764e16f | 2871 | |
c2b53d7b RS |
2872 | (defmacro while-no-input (&rest body) |
2873 | "Execute BODY only as long as there's no pending input. | |
2874 | If input arrives, that ends the execution of BODY, | |
83047ee3 RS |
2875 | and `while-no-input' returns t. Quitting makes it return nil. |
2876 | If BODY finishes, `while-no-input' returns whatever value BODY produced." | |
c2b53d7b RS |
2877 | (declare (debug t) (indent 0)) |
2878 | (let ((catch-sym (make-symbol "input"))) | |
2879 | `(with-local-quit | |
2880 | (catch ',catch-sym | |
2881 | (let ((throw-on-input ',catch-sym)) | |
790e0ef7 | 2882 | (or (input-pending-p) |
ff7d73ac | 2883 | (progn ,@body))))))) |
c2b53d7b | 2884 | |
47ccb993 SM |
2885 | (defmacro condition-case-no-debug (var bodyform &rest handlers) |
2886 | "Like `condition-case' except that it does not catch anything when debugging. | |
2887 | More specifically if `debug-on-error' is set, then it does not catch any signal." | |
2888 | (declare (debug condition-case) (indent 2)) | |
2889 | (let ((bodysym (make-symbol "body"))) | |
2890 | `(let ((,bodysym (lambda () ,bodyform))) | |
2891 | (if debug-on-error | |
2892 | (funcall ,bodysym) | |
2893 | (condition-case ,var | |
2894 | (funcall ,bodysym) | |
2895 | ,@handlers))))) | |
2896 | ||
2897 | (defmacro with-demoted-errors (&rest body) | |
2898 | "Run BODY and demote any errors to simple messages. | |
2899 | If `debug-on-error' is non-nil, run BODY without catching its errors. | |
2900 | This is to be used around code which is not expected to signal an error | |
04bf5b65 | 2901 | but which should be robust in the unexpected case that an error is signaled." |
47ccb993 SM |
2902 | (declare (debug t) (indent 0)) |
2903 | (let ((err (make-symbol "err"))) | |
2904 | `(condition-case-no-debug ,err | |
2905 | (progn ,@body) | |
7f0ea0ff | 2906 | (error (message "Error: %S" ,err) nil)))) |
47ccb993 | 2907 | |
2ec9c94e RS |
2908 | (defmacro combine-after-change-calls (&rest body) |
2909 | "Execute BODY, but don't call the after-change functions till the end. | |
2910 | If BODY makes changes in the buffer, they are recorded | |
2911 | and the functions on `after-change-functions' are called several times | |
2912 | when BODY is finished. | |
31aa282e | 2913 | The return value is the value of the last form in BODY. |
2ec9c94e RS |
2914 | |
2915 | If `before-change-functions' is non-nil, then calls to the after-change | |
2916 | functions can't be deferred, so in that case this macro has no effect. | |
2917 | ||
2918 | Do not alter `after-change-functions' or `before-change-functions' | |
2919 | in BODY." | |
d47f7515 | 2920 | (declare (indent 0) (debug t)) |
2ec9c94e RS |
2921 | `(unwind-protect |
2922 | (let ((combine-after-change-calls t)) | |
2923 | . ,body) | |
2924 | (combine-after-change-execute))) | |
6a978be3 CY |
2925 | |
2926 | (defmacro with-case-table (table &rest body) | |
2927 | "Execute the forms in BODY with TABLE as the current case table. | |
2928 | The value returned is the value of the last form in BODY." | |
2929 | (declare (indent 1) (debug t)) | |
8d6fd8d4 JPW |
2930 | (let ((old-case-table (make-symbol "table")) |
2931 | (old-buffer (make-symbol "buffer"))) | |
2932 | `(let ((,old-case-table (current-case-table)) | |
2933 | (,old-buffer (current-buffer))) | |
2934 | (unwind-protect | |
2935 | (progn (set-case-table ,table) | |
2936 | ,@body) | |
2937 | (with-current-buffer ,old-buffer | |
2938 | (set-case-table ,old-case-table)))))) | |
c4f484f2 | 2939 | \f |
c4f484f2 | 2940 | ;;; Matching and match data. |
2493767e | 2941 | |
c7ca41e6 RS |
2942 | (defvar save-match-data-internal) |
2943 | ||
2944 | ;; We use save-match-data-internal as the local variable because | |
2945 | ;; that works ok in practice (people should not use that variable elsewhere). | |
2946 | ;; We used to use an uninterned symbol; the compiler handles that properly | |
2947 | ;; now, but it generates slower code. | |
9a5336ae | 2948 | (defmacro save-match-data (&rest body) |
e4d03691 JB |
2949 | "Execute the BODY forms, restoring the global value of the match data. |
2950 | The value returned is the value of the last form in BODY." | |
64ed733a PE |
2951 | ;; It is better not to use backquote here, |
2952 | ;; because that makes a bootstrapping problem | |
2953 | ;; if you need to recompile all the Lisp files using interpreted code. | |
d47f7515 | 2954 | (declare (indent 0) (debug t)) |
64ed733a PE |
2955 | (list 'let |
2956 | '((save-match-data-internal (match-data))) | |
2957 | (list 'unwind-protect | |
2958 | (cons 'progn body) | |
d1fab151 KS |
2959 | ;; It is safe to free (evaporate) markers immediately here, |
2960 | ;; as Lisp programs should not copy from save-match-data-internal. | |
a0ef72df | 2961 | '(set-match-data save-match-data-internal 'evaporate)))) |
993713ce | 2962 | |
cd323f89 | 2963 | (defun match-string (num &optional string) |
993713ce SM |
2964 | "Return string of text matched by last search. |
2965 | NUM specifies which parenthesized expression in the last regexp. | |
2966 | Value is nil if NUMth pair didn't match, or there were less than NUM pairs. | |
2967 | Zero means the entire text matched by the whole regexp or whole string. | |
2968 | STRING should be given if the last search was by `string-match' on STRING." | |
cd323f89 SM |
2969 | (if (match-beginning num) |
2970 | (if string | |
2971 | (substring string (match-beginning num) (match-end num)) | |
2972 | (buffer-substring (match-beginning num) (match-end num))))) | |
58f950b4 | 2973 | |
bb760c71 RS |
2974 | (defun match-string-no-properties (num &optional string) |
2975 | "Return string of text matched by last search, without text properties. | |
2976 | NUM specifies which parenthesized expression in the last regexp. | |
2977 | Value is nil if NUMth pair didn't match, or there were less than NUM pairs. | |
2978 | Zero means the entire text matched by the whole regexp or whole string. | |
2979 | STRING should be given if the last search was by `string-match' on STRING." | |
2980 | (if (match-beginning num) | |
2981 | (if string | |
6b61353c KH |
2982 | (substring-no-properties string (match-beginning num) |
2983 | (match-end num)) | |
bb760c71 RS |
2984 | (buffer-substring-no-properties (match-beginning num) |
2985 | (match-end num))))) | |
2986 | ||
8c2e721a JL |
2987 | |
2988 | (defun match-substitute-replacement (replacement | |
2989 | &optional fixedcase literal string subexp) | |
2990 | "Return REPLACEMENT as it will be inserted by `replace-match'. | |
2991 | In other words, all back-references in the form `\\&' and `\\N' | |
2992 | are substituted with actual strings matched by the last search. | |
2993 | Optional FIXEDCASE, LITERAL, STRING and SUBEXP have the same | |
2994 | meaning as for `replace-match'." | |
2995 | (let ((match (match-string 0 string))) | |
2996 | (save-match-data | |
2997 | (set-match-data (mapcar (lambda (x) | |
2998 | (if (numberp x) | |
2999 | (- x (match-beginning 0)) | |
3000 | x)) | |
3001 | (match-data t))) | |
3002 | (replace-match replacement fixedcase literal match subexp)))) | |
3003 | ||
3004 | ||
46065dd4 | 3005 | (defun looking-back (regexp &optional limit greedy) |
f30e0cd8 | 3006 | "Return non-nil if text before point matches regular expression REGEXP. |
991b32c3 | 3007 | Like `looking-at' except matches before point, and is slower. |
01d16e16 RS |
3008 | LIMIT if non-nil speeds up the search by specifying a minimum |
3009 | starting position, to avoid checking matches that would start | |
3010 | before LIMIT. | |
46065dd4 | 3011 | |
cde27dd2 CY |
3012 | If GREEDY is non-nil, extend the match backwards as far as |
3013 | possible, stopping when a single additional previous character | |
3014 | cannot be part of a match for REGEXP. When the match is | |
3dcde186 | 3015 | extended, its starting position is allowed to occur before |
cde27dd2 | 3016 | LIMIT." |
46065dd4 RS |
3017 | (let ((start (point)) |
3018 | (pos | |
3019 | (save-excursion | |
3020 | (and (re-search-backward (concat "\\(?:" regexp "\\)\\=") limit t) | |
3021 | (point))))) | |
3022 | (if (and greedy pos) | |
3023 | (save-restriction | |
3024 | (narrow-to-region (point-min) start) | |
3025 | (while (and (> pos (point-min)) | |
3026 | (save-excursion | |
3027 | (goto-char pos) | |
3028 | (backward-char 1) | |
3029 | (looking-at (concat "\\(?:" regexp "\\)\\'")))) | |
3030 | (setq pos (1- pos))) | |
3031 | (save-excursion | |
3032 | (goto-char pos) | |
3033 | (looking-at (concat "\\(?:" regexp "\\)\\'"))))) | |
3034 | (not (null pos)))) | |
3035 | ||
45595a4f RS |
3036 | (defsubst looking-at-p (regexp) |
3037 | "\ | |
3038 | Same as `looking-at' except this function does not change the match data." | |
3039 | (let ((inhibit-changing-match-data t)) | |
3040 | (looking-at regexp))) | |
3041 | ||
3042 | (defsubst string-match-p (regexp string &optional start) | |
3043 | "\ | |
3044 | Same as `string-match' except this function does not change the match data." | |
3045 | (let ((inhibit-changing-match-data t)) | |
3046 | (string-match regexp string start))) | |
3047 | ||
c4f484f2 RS |
3048 | (defun subregexp-context-p (regexp pos &optional start) |
3049 | "Return non-nil if POS is in a normal subregexp context in REGEXP. | |
3050 | A subregexp context is one where a sub-regexp can appear. | |
3051 | A non-subregexp context is for example within brackets, or within a | |
3052 | repetition bounds operator `\\=\\{...\\}', or right after a `\\'. | |
3053 | If START is non-nil, it should be a position in REGEXP, smaller | |
3054 | than POS, and known to be in a subregexp context." | |
3055 | ;; Here's one possible implementation, with the great benefit that it | |
3056 | ;; reuses the regexp-matcher's own parser, so it understands all the | |
3057 | ;; details of the syntax. A disadvantage is that it needs to match the | |
3058 | ;; error string. | |
3059 | (condition-case err | |
3060 | (progn | |
3061 | (string-match (substring regexp (or start 0) pos) "") | |
3062 | t) | |
3063 | (invalid-regexp | |
3064 | (not (member (cadr err) '("Unmatched [ or [^" | |
3065 | "Unmatched \\{" | |
3066 | "Trailing backslash"))))) | |
3067 | ;; An alternative implementation: | |
3068 | ;; (defconst re-context-re | |
3069 | ;; (let* ((harmless-ch "[^\\[]") | |
3070 | ;; (harmless-esc "\\\\[^{]") | |
3071 | ;; (class-harmless-ch "[^][]") | |
3072 | ;; (class-lb-harmless "[^]:]") | |
3073 | ;; (class-lb-colon-maybe-charclass ":\\([a-z]+:]\\)?") | |
3074 | ;; (class-lb (concat "\\[\\(" class-lb-harmless | |
3075 | ;; "\\|" class-lb-colon-maybe-charclass "\\)")) | |
3076 | ;; (class | |
3077 | ;; (concat "\\[^?]?" | |
3078 | ;; "\\(" class-harmless-ch | |
3079 | ;; "\\|" class-lb "\\)*" | |
3080 | ;; "\\[?]")) ; special handling for bare [ at end of re | |
3081 | ;; (braces "\\\\{[0-9,]+\\\\}")) | |
3082 | ;; (concat "\\`\\(" harmless-ch "\\|" harmless-esc | |
3083 | ;; "\\|" class "\\|" braces "\\)*\\'")) | |
3084 | ;; "Matches any prefix that corresponds to a normal subregexp context.") | |
3085 | ;; (string-match re-context-re (substring regexp (or start 0) pos)) | |
3086 | ) | |
3087 | \f | |
3088 | ;;;; split-string | |
498535fb | 3089 | |
6a646626 JB |
3090 | (defconst split-string-default-separators "[ \f\t\n\r\v]+" |
3091 | "The default value of separators for `split-string'. | |
3092 | ||
3093 | A regexp matching strings of whitespace. May be locale-dependent | |
3094 | \(as yet unimplemented). Should not match non-breaking spaces. | |
3095 | ||
3096 | Warning: binding this to a different value and using it as default is | |
3097 | likely to have undesired semantics.") | |
3098 | ||
3099 | ;; The specification says that if both SEPARATORS and OMIT-NULLS are | |
3100 | ;; defaulted, OMIT-NULLS should be treated as t. Simplifying the logical | |
3101 | ;; expression leads to the equivalent implementation that if SEPARATORS | |
3102 | ;; is defaulted, OMIT-NULLS is treated as t. | |
3103 | (defun split-string (string &optional separators omit-nulls) | |
203998e5 | 3104 | "Split STRING into substrings bounded by matches for SEPARATORS. |
6a646626 JB |
3105 | |
3106 | The beginning and end of STRING, and each match for SEPARATORS, are | |
3107 | splitting points. The substrings matching SEPARATORS are removed, and | |
3108 | the substrings between the splitting points are collected as a list, | |
edce3654 | 3109 | which is returned. |
b222b786 | 3110 | |
6a646626 JB |
3111 | If SEPARATORS is non-nil, it should be a regular expression matching text |
3112 | which separates, but is not part of, the substrings. If nil it defaults to | |
3113 | `split-string-default-separators', normally \"[ \\f\\t\\n\\r\\v]+\", and | |
3114 | OMIT-NULLS is forced to t. | |
3115 | ||
a478f3e1 | 3116 | If OMIT-NULLS is t, zero-length substrings are omitted from the list \(so |
6a646626 JB |
3117 | that for the default value of SEPARATORS leading and trailing whitespace |
3118 | are effectively trimmed). If nil, all zero-length substrings are retained, | |
3119 | which correctly parses CSV format, for example. | |
3120 | ||
3121 | Note that the effect of `(split-string STRING)' is the same as | |
55e45419 | 3122 | `(split-string STRING split-string-default-separators t)'. In the rare |
6a646626 JB |
3123 | case that you wish to retain zero-length substrings when splitting on |
3124 | whitespace, use `(split-string STRING split-string-default-separators)'. | |
b021ef18 DL |
3125 | |
3126 | Modifies the match data; use `save-match-data' if necessary." | |
6a646626 JB |
3127 | (let ((keep-nulls (not (if separators omit-nulls t))) |
3128 | (rexp (or separators split-string-default-separators)) | |
edce3654 | 3129 | (start 0) |
b222b786 | 3130 | notfirst |
edce3654 | 3131 | (list nil)) |
b222b786 RS |
3132 | (while (and (string-match rexp string |
3133 | (if (and notfirst | |
3134 | (= start (match-beginning 0)) | |
3135 | (< start (length string))) | |
3136 | (1+ start) start)) | |
6a646626 | 3137 | (< start (length string))) |
b222b786 | 3138 | (setq notfirst t) |
6a646626 | 3139 | (if (or keep-nulls (< start (match-beginning 0))) |
edce3654 RS |
3140 | (setq list |
3141 | (cons (substring string start (match-beginning 0)) | |
3142 | list))) | |
3143 | (setq start (match-end 0))) | |
6a646626 | 3144 | (if (or keep-nulls (< start (length string))) |
edce3654 RS |
3145 | (setq list |
3146 | (cons (substring string start) | |
3147 | list))) | |
3148 | (nreverse list))) | |
0b93ff3a | 3149 | |
e80b3849 | 3150 | (defun combine-and-quote-strings (strings &optional separator) |
0b93ff3a NR |
3151 | "Concatenate the STRINGS, adding the SEPARATOR (default \" \"). |
3152 | This tries to quote the strings to avoid ambiguity such that | |
e80b3849 | 3153 | (split-string-and-unquote (combine-and-quote-strings strs)) == strs |
0b93ff3a | 3154 | Only some SEPARATORs will work properly." |
9f2bd2e7 SM |
3155 | (let* ((sep (or separator " ")) |
3156 | (re (concat "[\\\"]" "\\|" (regexp-quote sep)))) | |
0b93ff3a NR |
3157 | (mapconcat |
3158 | (lambda (str) | |
9f2bd2e7 | 3159 | (if (string-match re str) |
0b93ff3a NR |
3160 | (concat "\"" (replace-regexp-in-string "[\\\"]" "\\\\\\&" str) "\"") |
3161 | str)) | |
3162 | strings sep))) | |
3163 | ||
e80b3849 | 3164 | (defun split-string-and-unquote (string &optional separator) |
0b93ff3a | 3165 | "Split the STRING into a list of strings. |
e80b3849 RS |
3166 | It understands Emacs Lisp quoting within STRING, such that |
3167 | (split-string-and-unquote (combine-and-quote-strings strs)) == strs | |
0b93ff3a NR |
3168 | The SEPARATOR regexp defaults to \"\\s-+\"." |
3169 | (let ((sep (or separator "\\s-+")) | |
d551d20d | 3170 | (i (string-match "\"" string))) |
e80b3849 RS |
3171 | (if (null i) |
3172 | (split-string string sep t) ; no quoting: easy | |
0b93ff3a NR |
3173 | (append (unless (eq i 0) (split-string (substring string 0 i) sep t)) |
3174 | (let ((rfs (read-from-string string i))) | |
3175 | (cons (car rfs) | |
e80b3849 RS |
3176 | (split-string-and-unquote (substring string (cdr rfs)) |
3177 | sep))))))) | |
0b93ff3a | 3178 | |
c4f484f2 RS |
3179 | \f |
3180 | ;;;; Replacement in strings. | |
1ccaea52 AI |
3181 | |
3182 | (defun subst-char-in-string (fromchar tochar string &optional inplace) | |
3183 | "Replace FROMCHAR with TOCHAR in STRING each time it occurs. | |
3184 | Unless optional argument INPLACE is non-nil, return a new string." | |
e6e71807 SM |
3185 | (let ((i (length string)) |
3186 | (newstr (if inplace string (copy-sequence string)))) | |
3187 | (while (> i 0) | |
3188 | (setq i (1- i)) | |
3189 | (if (eq (aref newstr i) fromchar) | |
3190 | (aset newstr i tochar))) | |
3191 | newstr)) | |
b021ef18 | 3192 | |
1697159c | 3193 | (defun replace-regexp-in-string (regexp rep string &optional |
c8227332 | 3194 | fixedcase literal subexp start) |
b021ef18 DL |
3195 | "Replace all matches for REGEXP with REP in STRING. |
3196 | ||
3197 | Return a new string containing the replacements. | |
3198 | ||
3199 | Optional arguments FIXEDCASE, LITERAL and SUBEXP are like the | |
3200 | arguments with the same names of function `replace-match'. If START | |
3201 | is non-nil, start replacements at that index in STRING. | |
3202 | ||
3203 | REP is either a string used as the NEWTEXT arg of `replace-match' or a | |
23bb94bb RS |
3204 | function. If it is a function, it is called with the actual text of each |
3205 | match, and its value is used as the replacement text. When REP is called, | |
3fa173b4 | 3206 | the match data are the result of matching REGEXP against a substring |
23bb94bb | 3207 | of STRING. |
b021ef18 | 3208 | |
1697159c DL |
3209 | To replace only the first match (if any), make REGEXP match up to \\' |
3210 | and replace a sub-expression, e.g. | |
c9bcb507 | 3211 | (replace-regexp-in-string \"\\\\(foo\\\\).*\\\\'\" \"bar\" \" foo foo\" nil nil 1) |
1697159c DL |
3212 | => \" bar foo\" |
3213 | " | |
b021ef18 DL |
3214 | |
3215 | ;; To avoid excessive consing from multiple matches in long strings, | |
3216 | ;; don't just call `replace-match' continually. Walk down the | |
3217 | ;; string looking for matches of REGEXP and building up a (reversed) | |
3218 | ;; list MATCHES. This comprises segments of STRING which weren't | |
3219 | ;; matched interspersed with replacements for segments that were. | |
08b1f8a1 | 3220 | ;; [For a `large' number of replacements it's more efficient to |
b021ef18 DL |
3221 | ;; operate in a temporary buffer; we can't tell from the function's |
3222 | ;; args whether to choose the buffer-based implementation, though it | |
3223 | ;; might be reasonable to do so for long enough STRING.] | |
3224 | (let ((l (length string)) | |
3225 | (start (or start 0)) | |
3226 | matches str mb me) | |
3227 | (save-match-data | |
3228 | (while (and (< start l) (string-match regexp string start)) | |
3229 | (setq mb (match-beginning 0) | |
3230 | me (match-end 0)) | |
a9853251 SM |
3231 | ;; If we matched the empty string, make sure we advance by one char |
3232 | (when (= me mb) (setq me (min l (1+ mb)))) | |
3233 | ;; Generate a replacement for the matched substring. | |
3234 | ;; Operate only on the substring to minimize string consing. | |
3235 | ;; Set up match data for the substring for replacement; | |
3236 | ;; presumably this is likely to be faster than munging the | |
3237 | ;; match data directly in Lisp. | |
3238 | (string-match regexp (setq str (substring string mb me))) | |
3239 | (setq matches | |
3240 | (cons (replace-match (if (stringp rep) | |
3241 | rep | |
3242 | (funcall rep (match-string 0 str))) | |
3243 | fixedcase literal str subexp) | |
c8227332 | 3244 | (cons (substring string start mb) ; unmatched prefix |
a9853251 SM |
3245 | matches))) |
3246 | (setq start me)) | |
b021ef18 DL |
3247 | ;; Reconstruct a string from the pieces. |
3248 | (setq matches (cons (substring string start l) matches)) ; leftover | |
3249 | (apply #'concat (nreverse matches))))) | |
a7ed4c2a | 3250 | \f |
cb190d7d SM |
3251 | (defun string-prefix-p (str1 str2 &optional ignore-case) |
3252 | "Return non-nil if STR1 is a prefix of STR2. | |
3253 | If IGNORE-CASE is non-nil, the comparison is done without paying attention | |
3254 | to case differences." | |
3255 | (eq t (compare-strings str1 nil nil | |
3256 | str2 0 (length str1) ignore-case))) | |
3257 | \f | |
c4f484f2 | 3258 | ;;;; invisibility specs |
df8e73e1 | 3259 | |
c4f484f2 RS |
3260 | (defun add-to-invisibility-spec (element) |
3261 | "Add ELEMENT to `buffer-invisibility-spec'. | |
3262 | See documentation for `buffer-invisibility-spec' for the kind of elements | |
3263 | that can be added." | |
3264 | (if (eq buffer-invisibility-spec t) | |
3265 | (setq buffer-invisibility-spec (list t))) | |
3266 | (setq buffer-invisibility-spec | |
3267 | (cons element buffer-invisibility-spec))) | |
3268 | ||
3269 | (defun remove-from-invisibility-spec (element) | |
3270 | "Remove ELEMENT from `buffer-invisibility-spec'." | |
3271 | (if (consp buffer-invisibility-spec) | |
c8227332 VJL |
3272 | (setq buffer-invisibility-spec |
3273 | (delete element buffer-invisibility-spec)))) | |
a7ed4c2a | 3274 | \f |
c4f484f2 RS |
3275 | ;;;; Syntax tables. |
3276 | ||
3277 | (defmacro with-syntax-table (table &rest body) | |
3278 | "Evaluate BODY with syntax table of current buffer set to TABLE. | |
3279 | The syntax table of the current buffer is saved, BODY is evaluated, and the | |
3280 | saved table is restored, even in case of an abnormal exit. | |
3281 | Value is what BODY returns." | |
f291fe60 | 3282 | (declare (debug t) (indent 1)) |
c4f484f2 RS |
3283 | (let ((old-table (make-symbol "table")) |
3284 | (old-buffer (make-symbol "buffer"))) | |
3285 | `(let ((,old-table (syntax-table)) | |
3286 | (,old-buffer (current-buffer))) | |
3287 | (unwind-protect | |
3288 | (progn | |
3289 | (set-syntax-table ,table) | |
3290 | ,@body) | |
3291 | (save-current-buffer | |
3292 | (set-buffer ,old-buffer) | |
3293 | (set-syntax-table ,old-table)))))) | |
8af7df60 | 3294 | |
297d863b | 3295 | (defun make-syntax-table (&optional oldtable) |
984f718a | 3296 | "Return a new syntax table. |
0764e16f SM |
3297 | Create a syntax table which inherits from OLDTABLE (if non-nil) or |
3298 | from `standard-syntax-table' otherwise." | |
3299 | (let ((table (make-char-table 'syntax-table nil))) | |
3300 | (set-char-table-parent table (or oldtable (standard-syntax-table))) | |
3301 | table)) | |
31aa282e | 3302 | |
e9f13a95 | 3303 | (defun syntax-after (pos) |
9d1ffd5a EZ |
3304 | "Return the raw syntax of the char after POS. |
3305 | If POS is outside the buffer's accessible portion, return nil." | |
e9f13a95 | 3306 | (unless (or (< pos (point-min)) (>= pos (point-max))) |
d8ac3d27 SM |
3307 | (let ((st (if parse-sexp-lookup-properties |
3308 | (get-char-property pos 'syntax-table)))) | |
3309 | (if (consp st) st | |
3310 | (aref (or st (syntax-table)) (char-after pos)))))) | |
e9f13a95 | 3311 | |
cdd8dc28 | 3312 | (defun syntax-class (syntax) |
9d1ffd5a EZ |
3313 | "Return the syntax class part of the syntax descriptor SYNTAX. |
3314 | If SYNTAX is nil, return nil." | |
3315 | (and syntax (logand (car syntax) 65535))) | |
2493767e | 3316 | \f |
c4f484f2 | 3317 | ;;;; Text clones |
a13fe4c5 SM |
3318 | |
3319 | (defun text-clone-maintain (ol1 after beg end &optional len) | |
3320 | "Propagate the changes made under the overlay OL1 to the other clones. | |
3321 | This is used on the `modification-hooks' property of text clones." | |
3322 | (when (and after (not undo-in-progress) (overlay-start ol1)) | |
3323 | (let ((margin (if (overlay-get ol1 'text-clone-spreadp) 1 0))) | |
3324 | (setq beg (max beg (+ (overlay-start ol1) margin))) | |
3325 | (setq end (min end (- (overlay-end ol1) margin))) | |
3326 | (when (<= beg end) | |
3327 | (save-excursion | |
3328 | (when (overlay-get ol1 'text-clone-syntax) | |
3329 | ;; Check content of the clone's text. | |
3330 | (let ((cbeg (+ (overlay-start ol1) margin)) | |
3331 | (cend (- (overlay-end ol1) margin))) | |
3332 | (goto-char cbeg) | |
3333 | (save-match-data | |
3334 | (if (not (re-search-forward | |
3335 | (overlay-get ol1 'text-clone-syntax) cend t)) | |
3336 | ;; Mark the overlay for deletion. | |
3337 | (overlay-put ol1 'text-clones nil) | |
3338 | (when (< (match-end 0) cend) | |
3339 | ;; Shrink the clone at its end. | |
3340 | (setq end (min end (match-end 0))) | |
3341 | (move-overlay ol1 (overlay-start ol1) | |
3342 | (+ (match-end 0) margin))) | |
3343 | (when (> (match-beginning 0) cbeg) | |
3344 | ;; Shrink the clone at its beginning. | |
3345 | (setq beg (max (match-beginning 0) beg)) | |
3346 | (move-overlay ol1 (- (match-beginning 0) margin) | |
3347 | (overlay-end ol1))))))) | |
3348 | ;; Now go ahead and update the clones. | |
3349 | (let ((head (- beg (overlay-start ol1))) | |
3350 | (tail (- (overlay-end ol1) end)) | |
3351 | (str (buffer-substring beg end)) | |
3352 | (nothing-left t) | |
3353 | (inhibit-modification-hooks t)) | |
3354 | (dolist (ol2 (overlay-get ol1 'text-clones)) | |
3355 | (let ((oe (overlay-end ol2))) | |
3356 | (unless (or (eq ol1 ol2) (null oe)) | |
3357 | (setq nothing-left nil) | |
3358 | (let ((mod-beg (+ (overlay-start ol2) head))) | |
3359 | ;;(overlay-put ol2 'modification-hooks nil) | |
3360 | (goto-char (- (overlay-end ol2) tail)) | |
3361 | (unless (> mod-beg (point)) | |
3362 | (save-excursion (insert str)) | |
3363 | (delete-region mod-beg (point))) | |
3364 | ;;(overlay-put ol2 'modification-hooks '(text-clone-maintain)) | |
3365 | )))) | |
3366 | (if nothing-left (delete-overlay ol1)))))))) | |
3367 | ||
3368 | (defun text-clone-create (start end &optional spreadp syntax) | |
3369 | "Create a text clone of START...END at point. | |
3370 | Text clones are chunks of text that are automatically kept identical: | |
3371 | changes done to one of the clones will be immediately propagated to the other. | |
3372 | ||
3373 | The buffer's content at point is assumed to be already identical to | |
3374 | the one between START and END. | |
3375 | If SYNTAX is provided it's a regexp that describes the possible text of | |
3376 | the clones; the clone will be shrunk or killed if necessary to ensure that | |
3377 | its text matches the regexp. | |
3378 | If SPREADP is non-nil it indicates that text inserted before/after the | |
3379 | clone should be incorporated in the clone." | |
3380 | ;; To deal with SPREADP we can either use an overlay with `nil t' along | |
3381 | ;; with insert-(behind|in-front-of)-hooks or use a slightly larger overlay | |
3382 | ;; (with a one-char margin at each end) with `t nil'. | |
3383 | ;; We opted for a larger overlay because it behaves better in the case | |
3384 | ;; where the clone is reduced to the empty string (we want the overlay to | |
3385 | ;; stay when the clone's content is the empty string and we want to use | |
3386 | ;; `evaporate' to make sure those overlays get deleted when needed). | |
264ef586 | 3387 | ;; |
a13fe4c5 SM |
3388 | (let* ((pt-end (+ (point) (- end start))) |
3389 | (start-margin (if (or (not spreadp) (bobp) (<= start (point-min))) | |
3390 | 0 1)) | |
3391 | (end-margin (if (or (not spreadp) | |
3392 | (>= pt-end (point-max)) | |
3393 | (>= start (point-max))) | |
3394 | 0 1)) | |
3395 | (ol1 (make-overlay (- start start-margin) (+ end end-margin) nil t)) | |
3396 | (ol2 (make-overlay (- (point) start-margin) (+ pt-end end-margin) nil t)) | |
3397 | (dups (list ol1 ol2))) | |
3398 | (overlay-put ol1 'modification-hooks '(text-clone-maintain)) | |
3399 | (when spreadp (overlay-put ol1 'text-clone-spreadp t)) | |
3400 | (when syntax (overlay-put ol1 'text-clone-syntax syntax)) | |
3401 | ;;(overlay-put ol1 'face 'underline) | |
3402 | (overlay-put ol1 'evaporate t) | |
3403 | (overlay-put ol1 'text-clones dups) | |
264ef586 | 3404 | ;; |
a13fe4c5 SM |
3405 | (overlay-put ol2 'modification-hooks '(text-clone-maintain)) |
3406 | (when spreadp (overlay-put ol2 'text-clone-spreadp t)) | |
3407 | (when syntax (overlay-put ol2 'text-clone-syntax syntax)) | |
3408 | ;;(overlay-put ol2 'face 'underline) | |
3409 | (overlay-put ol2 'evaporate t) | |
3410 | (overlay-put ol2 'text-clones dups))) | |
c4f484f2 RS |
3411 | \f |
3412 | ;;;; Mail user agents. | |
27c079eb | 3413 | |
c4f484f2 RS |
3414 | ;; Here we include just enough for other packages to be able |
3415 | ;; to define them. | |
324cd947 | 3416 | |
27c079eb SM |
3417 | (defun define-mail-user-agent (symbol composefunc sendfunc |
3418 | &optional abortfunc hookvar) | |
3419 | "Define a symbol to identify a mail-sending package for `mail-user-agent'. | |
3420 | ||
3421 | SYMBOL can be any Lisp symbol. Its function definition and/or | |
3422 | value as a variable do not matter for this usage; we use only certain | |
3423 | properties on its property list, to encode the rest of the arguments. | |
3424 | ||
3425 | COMPOSEFUNC is program callable function that composes an outgoing | |
3426 | mail message buffer. This function should set up the basics of the | |
3427 | buffer without requiring user interaction. It should populate the | |
3428 | standard mail headers, leaving the `to:' and `subject:' headers blank | |
3429 | by default. | |
3430 | ||
3431 | COMPOSEFUNC should accept several optional arguments--the same | |
3432 | arguments that `compose-mail' takes. See that function's documentation. | |
3433 | ||
3434 | SENDFUNC is the command a user would run to send the message. | |
3435 | ||
3436 | Optional ABORTFUNC is the command a user would run to abort the | |
3437 | message. For mail packages that don't have a separate abort function, | |
3438 | this can be `kill-buffer' (the equivalent of omitting this argument). | |
3439 | ||
3440 | Optional HOOKVAR is a hook variable that gets run before the message | |
3441 | is actually sent. Callers that use the `mail-user-agent' may | |
3442 | install a hook function temporarily on this hook variable. | |
3443 | If HOOKVAR is nil, `mail-send-hook' is used. | |
3444 | ||
3445 | The properties used on SYMBOL are `composefunc', `sendfunc', | |
3446 | `abortfunc', and `hookvar'." | |
3447 | (put symbol 'composefunc composefunc) | |
3448 | (put symbol 'sendfunc sendfunc) | |
3449 | (put symbol 'abortfunc (or abortfunc 'kill-buffer)) | |
3450 | (put symbol 'hookvar (or hookvar 'mail-send-hook))) | |
c4f484f2 RS |
3451 | \f |
3452 | ;;;; Progress reporters. | |
b4329caa EZ |
3453 | |
3454 | ;; Progress reporter has the following structure: | |
3455 | ;; | |
3456 | ;; (NEXT-UPDATE-VALUE . [NEXT-UPDATE-TIME | |
3457 | ;; MIN-VALUE | |
3458 | ;; MAX-VALUE | |
3459 | ;; MESSAGE | |
3460 | ;; MIN-CHANGE | |
3461 | ;; MIN-TIME]) | |
3462 | ;; | |
3463 | ;; This weirdeness is for optimization reasons: we want | |
3464 | ;; `progress-reporter-update' to be as fast as possible, so | |
3465 | ;; `(car reporter)' is better than `(aref reporter 0)'. | |
3466 | ;; | |
3467 | ;; NEXT-UPDATE-TIME is a float. While `float-time' loses a couple | |
3468 | ;; digits of precision, it doesn't really matter here. On the other | |
3469 | ;; hand, it greatly simplifies the code. | |
3470 | ||
9326ba26 | 3471 | (defsubst progress-reporter-update (reporter &optional value) |
c85152fc | 3472 | "Report progress of an operation in the echo area. |
9326ba26 CY |
3473 | REPORTER should be the result of a call to `make-progress-reporter'. |
3474 | ||
3475 | If REPORTER is a numerical progress reporter---i.e. if it was | |
3476 | made using non-nil MIN-VALUE and MAX-VALUE arguments to | |
3477 | `make-progress-reporter'---then VALUE should be a number between | |
3478 | MIN-VALUE and MAX-VALUE. | |
c85152fc | 3479 | |
9326ba26 | 3480 | If REPORTER is a non-numerical reporter, VALUE should be nil. |
b4329caa | 3481 | |
9326ba26 CY |
3482 | This function is relatively inexpensive. If the change since |
3483 | last update is too small or insufficient time has passed, it does | |
3484 | nothing." | |
3485 | (when (or (not (numberp value)) ; For pulsing reporter | |
3486 | (>= value (car reporter))) ; For numerical reporter | |
3487 | (progress-reporter-do-update reporter value))) | |
3488 | ||
3489 | (defun make-progress-reporter (message &optional min-value max-value | |
3490 | current-value min-change min-time) | |
3491 | "Return progress reporter object for use with `progress-reporter-update'. | |
3492 | ||
3493 | MESSAGE is shown in the echo area, with a status indicator | |
3494 | appended to the end. When you call `progress-reporter-done', the | |
3495 | word \"done\" is printed after the MESSAGE. You can change the | |
3496 | MESSAGE of an existing progress reporter by calling | |
3497 | `progress-reporter-force-update'. | |
3498 | ||
3499 | MIN-VALUE and MAX-VALUE, if non-nil, are starting (0% complete) | |
3500 | and final (100% complete) states of operation; the latter should | |
3501 | be larger. In this case, the status message shows the percentage | |
3502 | progress. | |
3503 | ||
3504 | If MIN-VALUE and/or MAX-VALUE is omitted or nil, the status | |
3505 | message shows a \"spinning\", non-numeric indicator. | |
3506 | ||
3507 | Optional CURRENT-VALUE is the initial progress; the default is | |
3508 | MIN-VALUE. | |
3509 | Optional MIN-CHANGE is the minimal change in percents to report; | |
3510 | the default is 1%. | |
3511 | CURRENT-VALUE and MIN-CHANGE do not have any effect if MIN-VALUE | |
3512 | and/or MAX-VALUE are nil. | |
3513 | ||
3514 | Optional MIN-TIME specifies the minimum interval time between | |
3515 | echo area updates (default is 0.2 seconds.) If the function | |
3516 | `float-time' is not present, time is not tracked at all. If the | |
3517 | OS is not capable of measuring fractions of seconds, this | |
3518 | parameter is effectively rounded up." | |
b4329caa EZ |
3519 | (unless min-time |
3520 | (setq min-time 0.2)) | |
3521 | (let ((reporter | |
9326ba26 CY |
3522 | ;; Force a call to `message' now |
3523 | (cons (or min-value 0) | |
b4329caa EZ |
3524 | (vector (if (and (fboundp 'float-time) |
3525 | (>= min-time 0.02)) | |
3526 | (float-time) nil) | |
3527 | min-value | |
3528 | max-value | |
3529 | message | |
3530 | (if min-change (max (min min-change 50) 1) 1) | |
3531 | min-time)))) | |
3532 | (progress-reporter-update reporter (or current-value min-value)) | |
3533 | reporter)) | |
3534 | ||
9326ba26 | 3535 | (defun progress-reporter-force-update (reporter &optional value new-message) |
b4329caa EZ |
3536 | "Report progress of an operation in the echo area unconditionally. |
3537 | ||
9326ba26 CY |
3538 | The first two arguments are the same as in `progress-reporter-update'. |
3539 | NEW-MESSAGE, if non-nil, sets a new message for the reporter." | |
b4329caa EZ |
3540 | (let ((parameters (cdr reporter))) |
3541 | (when new-message | |
3542 | (aset parameters 3 new-message)) | |
3543 | (when (aref parameters 0) | |
3544 | (aset parameters 0 (float-time))) | |
3545 | (progress-reporter-do-update reporter value))) | |
3546 | ||
9326ba26 CY |
3547 | (defvar progress-reporter--pulse-characters ["-" "\\" "|" "/"] |
3548 | "Characters to use for pulsing progress reporters.") | |
3549 | ||
b4329caa EZ |
3550 | (defun progress-reporter-do-update (reporter value) |
3551 | (let* ((parameters (cdr reporter)) | |
9326ba26 | 3552 | (update-time (aref parameters 0)) |
b4329caa EZ |
3553 | (min-value (aref parameters 1)) |
3554 | (max-value (aref parameters 2)) | |
9326ba26 | 3555 | (text (aref parameters 3)) |
b4329caa EZ |
3556 | (current-time (float-time)) |
3557 | (enough-time-passed | |
3558 | ;; See if enough time has passed since the last update. | |
3559 | (or (not update-time) | |
3560 | (when (>= current-time update-time) | |
3561 | ;; Calculate time for the next update | |
3562 | (aset parameters 0 (+ update-time (aref parameters 5))))))) | |
9326ba26 CY |
3563 | (cond ((and min-value max-value) |
3564 | ;; Numerical indicator | |
3565 | (let* ((one-percent (/ (- max-value min-value) 100.0)) | |
3566 | (percentage (if (= max-value min-value) | |
3567 | 0 | |
3568 | (truncate (/ (- value min-value) | |
3569 | one-percent))))) | |
3570 | ;; Calculate NEXT-UPDATE-VALUE. If we are not printing | |
3571 | ;; message because not enough time has passed, use 1 | |
3572 | ;; instead of MIN-CHANGE. This makes delays between echo | |
3573 | ;; area updates closer to MIN-TIME. | |
3574 | (setcar reporter | |
3575 | (min (+ min-value (* (+ percentage | |
3576 | (if enough-time-passed | |
3577 | ;; MIN-CHANGE | |
3578 | (aref parameters 4) | |
3579 | 1)) | |
3580 | one-percent)) | |
3581 | max-value)) | |
3582 | (when (integerp value) | |
3583 | (setcar reporter (ceiling (car reporter)))) | |
3584 | ;; Only print message if enough time has passed | |
3585 | (when enough-time-passed | |
3586 | (if (> percentage 0) | |
3587 | (message "%s%d%%" text percentage) | |
3588 | (message "%s" text))))) | |
3589 | ;; Pulsing indicator | |
3590 | (enough-time-passed | |
3591 | (let ((index (mod (1+ (car reporter)) 4)) | |
3592 | (message-log-max nil)) | |
3593 | (setcar reporter index) | |
3594 | (message "%s %s" | |
3595 | text | |
3596 | (aref progress-reporter--pulse-characters | |
3597 | index))))))) | |
b4329caa EZ |
3598 | |
3599 | (defun progress-reporter-done (reporter) | |
3600 | "Print reporter's message followed by word \"done\" in echo area." | |
3601 | (message "%sdone" (aref (cdr reporter) 3))) | |
3602 | ||
aa56124a SM |
3603 | (defmacro dotimes-with-progress-reporter (spec message &rest body) |
3604 | "Loop a certain number of times and report progress in the echo area. | |
3605 | Evaluate BODY with VAR bound to successive integers running from | |
3606 | 0, inclusive, to COUNT, exclusive. Then evaluate RESULT to get | |
3607 | the return value (nil if RESULT is omitted). | |
3608 | ||
3609 | At each iteration MESSAGE followed by progress percentage is | |
3610 | printed in the echo area. After the loop is finished, MESSAGE | |
3611 | followed by word \"done\" is printed. This macro is a | |
3612 | convenience wrapper around `make-progress-reporter' and friends. | |
3613 | ||
3614 | \(fn (VAR COUNT [RESULT]) MESSAGE BODY...)" | |
3615 | (declare (indent 2) (debug ((symbolp form &optional form) form body))) | |
3616 | (let ((temp (make-symbol "--dotimes-temp--")) | |
3617 | (temp2 (make-symbol "--dotimes-temp2--")) | |
3618 | (start 0) | |
3619 | (end (nth 1 spec))) | |
3620 | `(let ((,temp ,end) | |
3621 | (,(car spec) ,start) | |
3622 | (,temp2 (make-progress-reporter ,message ,start ,end))) | |
3623 | (while (< ,(car spec) ,temp) | |
3624 | ,@body | |
3625 | (progress-reporter-update ,temp2 | |
3626 | (setq ,(car spec) (1+ ,(car spec))))) | |
3627 | (progress-reporter-done ,temp2) | |
3628 | nil ,@(cdr (cdr spec))))) | |
ca548b00 | 3629 | |
e9454757 | 3630 | \f |
c4f484f2 | 3631 | ;;;; Comparing version strings. |
e9454757 | 3632 | |
2f7f4bee | 3633 | (defconst version-separator "." |
b29f5b7b | 3634 | "Specify the string used to separate the version elements. |
e9454757 VJL |
3635 | |
3636 | Usually the separator is \".\", but it can be any other string.") | |
3637 | ||
3638 | ||
2f7f4bee | 3639 | (defconst version-regexp-alist |
b29f5b7b VJL |
3640 | '(("^[-_+ ]?alpha$" . -3) |
3641 | ("^[-_+]$" . -3) ; treat "1.2.3-20050920" and "1.2-3" as alpha releases | |
3642 | ("^[-_+ ]cvs$" . -3) ; treat "1.2.3-CVS" as alpha release | |
3643 | ("^[-_+ ]?beta$" . -2) | |
e2046ecf | 3644 | ("^[-_+ ]?\\(pre\\|rcc\\)$" . -1)) |
b29f5b7b | 3645 | "Specify association between non-numeric version and its priority. |
e9454757 VJL |
3646 | |
3647 | This association is used to handle version string like \"1.0pre2\", | |
3648 | \"0.9alpha1\", etc. It's used by `version-to-list' (which see) to convert the | |
94785022 | 3649 | non-numeric part of a version string to an integer. For example: |
e9454757 VJL |
3650 | |
3651 | String Version Integer List Version | |
3652 | \"1.0pre2\" (1 0 -1 2) | |
3653 | \"1.0PRE2\" (1 0 -1 2) | |
3654 | \"22.8beta3\" (22 8 -2 3) | |
c71abb54 | 3655 | \"22.8 Beta3\" (22 8 -2 3) |
e9454757 VJL |
3656 | \"0.9alpha1\" (0 9 -3 1) |
3657 | \"0.9AlphA1\" (0 9 -3 1) | |
c71abb54 | 3658 | \"0.9 alpha\" (0 9 -3) |
e9454757 VJL |
3659 | |
3660 | Each element has the following form: | |
3661 | ||
3662 | (REGEXP . PRIORITY) | |
3663 | ||
3664 | Where: | |
3665 | ||
3666 | REGEXP regexp used to match non-numeric part of a version string. | |
94785022 | 3667 | It should begin with the `^' anchor and end with a `$' to |
d74a5c91 EZ |
3668 | prevent false hits. Letter-case is ignored while matching |
3669 | REGEXP. | |
e9454757 | 3670 | |
94785022 | 3671 | PRIORITY a negative integer specifying non-numeric priority of REGEXP.") |
e9454757 VJL |
3672 | |
3673 | ||
3674 | (defun version-to-list (ver) | |
94785022 | 3675 | "Convert version string VER into a list of integers. |
e9454757 VJL |
3676 | |
3677 | The version syntax is given by the following EBNF: | |
3678 | ||
3679 | VERSION ::= NUMBER ( SEPARATOR NUMBER )*. | |
3680 | ||
3681 | NUMBER ::= (0|1|2|3|4|5|6|7|8|9)+. | |
3682 | ||
3683 | SEPARATOR ::= `version-separator' (which see) | |
3684 | | `version-regexp-alist' (which see). | |
3685 | ||
d74a5c91 EZ |
3686 | The NUMBER part is optional if SEPARATOR is a match for an element |
3687 | in `version-regexp-alist'. | |
3688 | ||
94785022 | 3689 | Examples of valid version syntax: |
e9454757 | 3690 | |
d74a5c91 | 3691 | 1.0pre2 1.0.7.5 22.8beta3 0.9alpha1 6.9.30Beta |
e9454757 | 3692 | |
94785022 | 3693 | Examples of invalid version syntax: |
e9454757 VJL |
3694 | |
3695 | 1.0prepre2 1.0..7.5 22.8X3 alpha3.2 .5 | |
3696 | ||
94785022 | 3697 | Examples of version conversion: |
e9454757 | 3698 | |
94785022 | 3699 | Version String Version as a List of Integers |
e9454757 VJL |
3700 | \"1.0.7.5\" (1 0 7 5) |
3701 | \"1.0pre2\" (1 0 -1 2) | |
3702 | \"1.0PRE2\" (1 0 -1 2) | |
3703 | \"22.8beta3\" (22 8 -2 3) | |
3704 | \"22.8Beta3\" (22 8 -2 3) | |
3705 | \"0.9alpha1\" (0 9 -3 1) | |
3706 | \"0.9AlphA1\" (0 9 -3 1) | |
3707 | \"0.9alpha\" (0 9 -3) | |
3708 | ||
3709 | See documentation for `version-separator' and `version-regexp-alist'." | |
c71abb54 | 3710 | (or (and (stringp ver) (> (length ver) 0)) |
e9454757 | 3711 | (error "Invalid version string: '%s'" ver)) |
c71abb54 KS |
3712 | ;; Change .x.y to 0.x.y |
3713 | (if (and (>= (length ver) (length version-separator)) | |
3714 | (string-equal (substring ver 0 (length version-separator)) | |
c8227332 | 3715 | version-separator)) |
c71abb54 | 3716 | (setq ver (concat "0" ver))) |
e9454757 VJL |
3717 | (save-match-data |
3718 | (let ((i 0) | |
d74a5c91 | 3719 | (case-fold-search t) ; ignore case in matching |
e9454757 VJL |
3720 | lst s al) |
3721 | (while (and (setq s (string-match "[0-9]+" ver i)) | |
3722 | (= s i)) | |
3723 | ;; handle numeric part | |
3724 | (setq lst (cons (string-to-number (substring ver i (match-end 0))) | |
3725 | lst) | |
3726 | i (match-end 0)) | |
3727 | ;; handle non-numeric part | |
3728 | (when (and (setq s (string-match "[^0-9]+" ver i)) | |
3729 | (= s i)) | |
3730 | (setq s (substring ver i (match-end 0)) | |
3731 | i (match-end 0)) | |
3732 | ;; handle alpha, beta, pre, etc. separator | |
3733 | (unless (string= s version-separator) | |
3734 | (setq al version-regexp-alist) | |
3735 | (while (and al (not (string-match (caar al) s))) | |
3736 | (setq al (cdr al))) | |
e2046ecf CY |
3737 | (cond (al |
3738 | (push (cdar al) lst)) | |
b29f5b7b | 3739 | ;; Convert 22.3a to 22.3.1, 22.3b to 22.3.2, etc. |
e2046ecf CY |
3740 | ((string-match "^[-_+ ]?\\([a-zA-Z]\\)$" s) |
3741 | (push (- (aref (downcase (match-string 1 s)) 0) ?a -1) | |
3742 | lst)) | |
3743 | (t (error "Invalid version syntax: '%s'" ver)))))) | |
e9454757 VJL |
3744 | (if (null lst) |
3745 | (error "Invalid version syntax: '%s'" ver) | |
3746 | (nreverse lst))))) | |
3747 | ||
3748 | ||
ca548b00 | 3749 | (defun version-list-< (l1 l2) |
94785022 | 3750 | "Return t if L1, a list specification of a version, is lower than L2. |
e9454757 | 3751 | |
94785022 EZ |
3752 | Note that a version specified by the list (1) is equal to (1 0), |
3753 | \(1 0 0), (1 0 0 0), etc. That is, the trailing zeros are insignificant. | |
3754 | Also, a version given by the list (1) is higher than (1 -1), which in | |
3755 | turn is higher than (1 -2), which is higher than (1 -3)." | |
e9454757 VJL |
3756 | (while (and l1 l2 (= (car l1) (car l2))) |
3757 | (setq l1 (cdr l1) | |
3758 | l2 (cdr l2))) | |
3759 | (cond | |
3760 | ;; l1 not null and l2 not null | |
3761 | ((and l1 l2) (< (car l1) (car l2))) | |
3762 | ;; l1 null and l2 null ==> l1 length = l2 length | |
3763 | ((and (null l1) (null l2)) nil) | |
3764 | ;; l1 not null and l2 null ==> l1 length > l2 length | |
ca548b00 | 3765 | (l1 (< (version-list-not-zero l1) 0)) |
e9454757 | 3766 | ;; l1 null and l2 not null ==> l2 length > l1 length |
ca548b00 | 3767 | (t (< 0 (version-list-not-zero l2))))) |
e9454757 VJL |
3768 | |
3769 | ||
ca548b00 | 3770 | (defun version-list-= (l1 l2) |
94785022 | 3771 | "Return t if L1, a list specification of a version, is equal to L2. |
e9454757 | 3772 | |
94785022 EZ |
3773 | Note that a version specified by the list (1) is equal to (1 0), |
3774 | \(1 0 0), (1 0 0 0), etc. That is, the trailing zeros are insignificant. | |
3775 | Also, a version given by the list (1) is higher than (1 -1), which in | |
3776 | turn is higher than (1 -2), which is higher than (1 -3)." | |
e9454757 VJL |
3777 | (while (and l1 l2 (= (car l1) (car l2))) |
3778 | (setq l1 (cdr l1) | |
3779 | l2 (cdr l2))) | |
3780 | (cond | |
3781 | ;; l1 not null and l2 not null | |
3782 | ((and l1 l2) nil) | |
3783 | ;; l1 null and l2 null ==> l1 length = l2 length | |
3784 | ((and (null l1) (null l2))) | |
3785 | ;; l1 not null and l2 null ==> l1 length > l2 length | |
ca548b00 | 3786 | (l1 (zerop (version-list-not-zero l1))) |
e9454757 | 3787 | ;; l1 null and l2 not null ==> l2 length > l1 length |
ca548b00 | 3788 | (t (zerop (version-list-not-zero l2))))) |
e9454757 VJL |
3789 | |
3790 | ||
ca548b00 | 3791 | (defun version-list-<= (l1 l2) |
94785022 | 3792 | "Return t if L1, a list specification of a version, is lower or equal to L2. |
e9454757 VJL |
3793 | |
3794 | Note that integer list (1) is equal to (1 0), (1 0 0), (1 0 0 0), | |
b29f5b7b | 3795 | etc. That is, the trailing zeroes are insignificant. Also, integer |
e9454757 VJL |
3796 | list (1) is greater than (1 -1) which is greater than (1 -2) |
3797 | which is greater than (1 -3)." | |
3798 | (while (and l1 l2 (= (car l1) (car l2))) | |
3799 | (setq l1 (cdr l1) | |
3800 | l2 (cdr l2))) | |
3801 | (cond | |
3802 | ;; l1 not null and l2 not null | |
3803 | ((and l1 l2) (< (car l1) (car l2))) | |
3804 | ;; l1 null and l2 null ==> l1 length = l2 length | |
3805 | ((and (null l1) (null l2))) | |
3806 | ;; l1 not null and l2 null ==> l1 length > l2 length | |
ca548b00 | 3807 | (l1 (<= (version-list-not-zero l1) 0)) |
e9454757 | 3808 | ;; l1 null and l2 not null ==> l2 length > l1 length |
ca548b00 | 3809 | (t (<= 0 (version-list-not-zero l2))))) |
e9454757 | 3810 | |
ca548b00 | 3811 | (defun version-list-not-zero (lst) |
94785022 | 3812 | "Return the first non-zero element of LST, which is a list of integers. |
e9454757 | 3813 | |
94785022 | 3814 | If all LST elements are zeros or LST is nil, return zero." |
ca548b00 KS |
3815 | (while (and lst (zerop (car lst))) |
3816 | (setq lst (cdr lst))) | |
3817 | (if lst | |
3818 | (car lst) | |
3819 | ;; there is no element different of zero | |
3820 | 0)) | |
e9454757 VJL |
3821 | |
3822 | ||
3823 | (defun version< (v1 v2) | |
94785022 | 3824 | "Return t if version V1 is lower (older) than V2. |
e9454757 VJL |
3825 | |
3826 | Note that version string \"1\" is equal to \"1.0\", \"1.0.0\", \"1.0.0.0\", | |
94785022 EZ |
3827 | etc. That is, the trailing \".0\"s are insignificant. Also, version |
3828 | string \"1\" is higher (newer) than \"1pre\", which is higher than \"1beta\", | |
3829 | which is higher than \"1alpha\"." | |
ca548b00 | 3830 | (version-list-< (version-to-list v1) (version-to-list v2))) |
e9454757 VJL |
3831 | |
3832 | ||
3833 | (defun version<= (v1 v2) | |
94785022 | 3834 | "Return t if version V1 is lower (older) than or equal to V2. |
e9454757 VJL |
3835 | |
3836 | Note that version string \"1\" is equal to \"1.0\", \"1.0.0\", \"1.0.0.0\", | |
b29f5b7b | 3837 | etc. That is, the trailing \".0\"s are insignificant. Also, version |
94785022 EZ |
3838 | string \"1\" is higher (newer) than \"1pre\", which is higher than \"1beta\", |
3839 | which is higher than \"1alpha\"." | |
ca548b00 | 3840 | (version-list-<= (version-to-list v1) (version-to-list v2))) |
e9454757 | 3841 | |
ca548b00 KS |
3842 | (defun version= (v1 v2) |
3843 | "Return t if version V1 is equal to V2. | |
e9454757 | 3844 | |
ca548b00 | 3845 | Note that version string \"1\" is equal to \"1.0\", \"1.0.0\", \"1.0.0.0\", |
b29f5b7b | 3846 | etc. That is, the trailing \".0\"s are insignificant. Also, version |
94785022 EZ |
3847 | string \"1\" is higher (newer) than \"1pre\", which is higher than \"1beta\", |
3848 | which is higher than \"1alpha\"." | |
ca548b00 | 3849 | (version-list-= (version-to-list v1) (version-to-list v2))) |
e9454757 | 3850 | |
18d433a7 CY |
3851 | \f |
3852 | ;;; Misc. | |
a3c20c83 DN |
3853 | (defconst menu-bar-separator '("--") |
3854 | "Separator for menus.") | |
18d433a7 CY |
3855 | |
3856 | ;; The following statement ought to be in print.c, but `provide' can't | |
3857 | ;; be used there. | |
5612fd08 | 3858 | ;; http://lists.gnu.org/archive/html/emacs-devel/2009-08/msg00236.html |
18d433a7 CY |
3859 | (when (hash-table-p (car (read-from-string |
3860 | (prin1-to-string (make-hash-table))))) | |
3861 | (provide 'hashtable-print-readable)) | |
3862 | ||
630cc463 | 3863 | ;;; subr.el ends here |