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60370d40 | 1 | ;;; select.el --- lisp portion of standard selection support |
3109d63f | 2 | |
30764597 | 3 | ;; Maintainer: FSF |
3109d63f ER |
4 | ;; Keywords: internal |
5 | ||
8f1204db | 6 | ;; Copyright (c) 1993, 1994 Free Software Foundation, Inc. |
3109d63f ER |
7 | ;; Based partially on earlier release by Lucid. |
8 | ||
9 | ;; This file is part of GNU Emacs. | |
10 | ||
11 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
12 | ;; it under the terms of the GNU General Public License as published by | |
13 | ;; the Free Software Foundation; either version 2, or (at your option) | |
14 | ;; any later version. | |
15 | ||
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
b578f267 EN |
22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
23 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
24 | ;; Boston, MA 02111-1307, USA. | |
3109d63f | 25 | |
60370d40 PJ |
26 | ;;; Commentary: |
27 | ||
3109d63f ER |
28 | ;;; Code: |
29 | ||
30 | ;; This is for temporary compatibility with pre-release Emacs 19. | |
31e1d920 | 31 | (defalias 'x-selection 'x-get-selection) |
3109d63f ER |
32 | (defun x-get-selection (&optional type data-type) |
33 | "Return the value of an X Windows selection. | |
34 | The argument TYPE (default `PRIMARY') says which selection, | |
4029fd9a | 35 | and the argument DATA-TYPE (default `STRING') says |
76058c27 EZ |
36 | how to convert the data. |
37 | ||
38 | TYPE may be `SECONDARY' or `CLIPBOARD', in addition to `PRIMARY'. | |
39 | DATA-TYPE is usually `STRING', but can also be one of the symbols | |
40 | in `selection-converter-alist', which see." | |
4029fd9a | 41 | (x-get-selection-internal (or type 'PRIMARY) (or data-type 'STRING))) |
3109d63f ER |
42 | |
43 | (defun x-get-clipboard () | |
44 | "Return text pasted to the clipboard." | |
45 | (x-get-selection-internal 'CLIPBOARD 'STRING)) | |
46 | ||
47 | (defun x-set-selection (type data) | |
48 | "Make an X Windows selection of type TYPE and value DATA. | |
49 | The argument TYPE (default `PRIMARY') says which selection, | |
50 | and DATA specifies the contents. DATA may be a string, | |
5038b790 RS |
51 | a symbol, an integer (or a cons of two integers or list of two integers). |
52 | ||
53 | The selection may also be a cons of two markers pointing to the same buffer, | |
54 | or an overlay. In these cases, the selection is considered to be the text | |
55 | between the markers *at whatever time the selection is examined*. | |
56 | Thus, editing done in the buffer after you specify the selection | |
57 | can alter the effective value of the selection. | |
58 | ||
59 | The data may also be a vector of valid non-vector selection values. | |
60 | ||
1b270b55 GM |
61 | Interactively, the text of the region is used as the selection value |
62 | if the prefix arg is set." | |
3109d63f | 63 | (interactive (if (not current-prefix-arg) |
5038b790 | 64 | (list 'PRIMARY (read-string "Set text for pasting: ")) |
1b270b55 | 65 | (list 'PRIMARY (buffer-substring (region-beginning) (region-end))))) |
3109d63f ER |
66 | ;; This is for temporary compatibility with pre-release Emacs 19. |
67 | (if (stringp type) | |
68 | (setq type (intern type))) | |
69 | (or (x-valid-simple-selection-p data) | |
70 | (and (vectorp data) | |
71 | (let ((valid t) | |
72 | (i (1- (length data)))) | |
73 | (while (>= i 0) | |
74 | (or (x-valid-simple-selection-p (aref data i)) | |
75 | (setq valid nil)) | |
76 | (setq i (1- i))) | |
77 | valid)) | |
78 | (signal 'error (list "invalid selection" data))) | |
79 | (or type (setq type 'PRIMARY)) | |
80 | (if data | |
81 | (x-own-selection-internal type data) | |
82 | (x-disown-selection-internal type)) | |
83 | data) | |
84 | ||
85 | (defun x-valid-simple-selection-p (data) | |
86 | (or (stringp data) | |
87 | (symbolp data) | |
88 | (integerp data) | |
89 | (and (consp data) | |
90 | (integerp (car data)) | |
91 | (or (integerp (cdr data)) | |
92 | (and (consp (cdr data)) | |
93 | (integerp (car (cdr data)))))) | |
6eac0de6 | 94 | (overlayp data) |
3109d63f ER |
95 | (and (consp data) |
96 | (markerp (car data)) | |
97 | (markerp (cdr data)) | |
98 | (marker-buffer (car data)) | |
99 | (marker-buffer (cdr data)) | |
100 | (eq (marker-buffer (car data)) | |
101 | (marker-buffer (cdr data))) | |
102 | (buffer-name (marker-buffer (car data))) | |
103 | (buffer-name (marker-buffer (cdr data)))))) | |
104 | \f | |
105 | ;;; Cut Buffer support | |
106 | ||
107 | (defun x-get-cut-buffer (&optional which-one) | |
8157ac14 PJ |
108 | "Returns the value of one of the 8 X server cut-buffers. |
109 | Optional arg WHICH-ONE should be a number from 0 to 7, defaulting to 0. | |
3109d63f ER |
110 | Cut buffers are considered obsolete; you should use selections instead." |
111 | (x-get-cut-buffer-internal | |
112 | (if which-one | |
113 | (aref [CUT_BUFFER0 CUT_BUFFER1 CUT_BUFFER2 CUT_BUFFER3 | |
114 | CUT_BUFFER4 CUT_BUFFER5 CUT_BUFFER6 CUT_BUFFER7] | |
115 | which-one) | |
116 | 'CUT_BUFFER0))) | |
117 | ||
39479f7e | 118 | (defun x-set-cut-buffer (string &optional push) |
3109d63f | 119 | "Store STRING into the X server's primary cut buffer. |
39479f7e RS |
120 | If PUSH is non-nil, also rotate the cut buffers: |
121 | this means the previous value of the primary cut buffer moves the second | |
3109d63f ER |
122 | cut buffer, and the second to the third, and so on (there are 8 buffers.) |
123 | Cut buffers are considered obsolete; you should use selections instead." | |
124 | ;; Check the data type of STRING. | |
125 | (substring string 0 0) | |
39479f7e RS |
126 | (if push |
127 | (x-rotate-cut-buffers-internal 1)) | |
3109d63f ER |
128 | (x-store-cut-buffer-internal 'CUT_BUFFER0 string)) |
129 | ||
130 | \f | |
131 | ;;; Functions to convert the selection into various other selection types. | |
132 | ;;; Every selection type that Emacs handles is implemented this way, except | |
133 | ;;; for TIMESTAMP, which is a special case. | |
134 | ||
135 | (defun xselect-convert-to-string (selection type value) | |
eb1416b9 KH |
136 | (let (str coding) |
137 | ;; Get the actual string from VALUE. | |
138 | (cond ((stringp value) | |
139 | (setq str value)) | |
140 | ||
141 | ((overlayp value) | |
142 | (save-excursion | |
143 | (or (buffer-name (overlay-buffer value)) | |
144 | (error "selection is in a killed buffer")) | |
145 | (set-buffer (overlay-buffer value)) | |
146 | (setq str (buffer-substring (overlay-start value) | |
147 | (overlay-end value))))) | |
148 | ((and (consp value) | |
149 | (markerp (car value)) | |
150 | (markerp (cdr value))) | |
151 | (or (eq (marker-buffer (car value)) (marker-buffer (cdr value))) | |
152 | (signal 'error | |
153 | (list "markers must be in the same buffer" | |
154 | (car value) (cdr value)))) | |
155 | (save-excursion | |
156 | (set-buffer (or (marker-buffer (car value)) | |
157 | (error "selection is in a killed buffer"))) | |
158 | (setq str (buffer-substring (car value) (cdr value)))))) | |
159 | ||
160 | (when str | |
161 | ;; If TYPE is nil, this is a local request, thus return STR as | |
162 | ;; is. Otherwise, encode STR. | |
163 | (if (not type) | |
164 | str | |
165 | (setq coding (or next-selection-coding-system selection-coding-system)) | |
166 | (if coding | |
167 | (setq coding (coding-system-base coding)) | |
168 | (setq coding 'raw-text)) | |
169 | ;; Suppress producing escape sequences for compositions. | |
170 | (remove-text-properties 0 (length str) '(composition nil) str) | |
171 | (cond | |
172 | ((eq type 'TEXT) | |
173 | (if (not (multibyte-string-p str)) | |
174 | ;; Don't have to encode unibyte string. | |
175 | (setq type 'STRING) | |
176 | ;; If STR contains only ASCII, Latin-1, and raw bytes, | |
177 | ;; encode STR by iso-latin-1, and return it as type | |
178 | ;; `STRING'. Otherwise, encode STR by CODING. In that | |
179 | ;; case, the returing type depends on CODING. | |
180 | (let ((charsets (find-charset-string str))) | |
181 | (setq charsets | |
182 | (delq 'ascii | |
183 | (delq 'latin-iso8859-1 | |
184 | (delq 'eight-bit-control | |
185 | (delq 'eight-bit-graphic charsets))))) | |
186 | (if charsets | |
187 | (setq str (encode-coding-string str coding) | |
188 | type (if (memq coding '(compound-text | |
189 | compound-text-with-extensions)) | |
190 | 'COMPOUND_TEXT | |
191 | 'STRING)) | |
192 | (setq type 'STRING | |
193 | str (encode-coding-string str 'iso-latin-1)))))) | |
194 | ||
195 | ((eq type 'COMPOUND_TEXT) | |
196 | (setq str (encode-coding-string str coding))) | |
197 | ||
198 | ((eq type 'STRING) | |
199 | (if (memq coding '(compound-text | |
200 | compound-text-with-extensions)) | |
201 | (setq str (string-make-unibyte str)) | |
202 | (setq str (encode-coding-string str coding)))) | |
203 | ||
204 | ((eq type 'UTF8_STRING) | |
205 | (setq str (encode-coding-string str 'utf-8))) | |
206 | ||
207 | (t | |
208 | (error "Unknow selection type: %S" type)) | |
209 | )) | |
210 | ||
211 | (setq next-selection-coding-system nil) | |
212 | (cons type str)))) | |
213 | ||
3109d63f ER |
214 | |
215 | (defun xselect-convert-to-length (selection type value) | |
216 | (let ((value | |
217 | (cond ((stringp value) | |
218 | (length value)) | |
6eac0de6 RS |
219 | ((overlayp value) |
220 | (abs (- (overlay-end value) (overlay-start value)))) | |
3109d63f ER |
221 | ((and (consp value) |
222 | (markerp (car value)) | |
223 | (markerp (cdr value))) | |
224 | (or (eq (marker-buffer (car value)) | |
225 | (marker-buffer (cdr value))) | |
226 | (signal 'error | |
227 | (list "markers must be in the same buffer" | |
228 | (car value) (cdr value)))) | |
229 | (abs (- (car value) (cdr value))))))) | |
230 | (if value ; force it to be in 32-bit format. | |
231 | (cons (ash value -16) (logand value 65535)) | |
232 | nil))) | |
233 | ||
234 | (defun xselect-convert-to-targets (selection type value) | |
235 | ;; return a vector of atoms, but remove duplicates first. | |
236 | (let* ((all (cons 'TIMESTAMP (mapcar 'car selection-converter-alist))) | |
237 | (rest all)) | |
238 | (while rest | |
239 | (cond ((memq (car rest) (cdr rest)) | |
240 | (setcdr rest (delq (car rest) (cdr rest)))) | |
241 | ((eq (car (cdr rest)) '_EMACS_INTERNAL) ; shh, it's a secret | |
242 | (setcdr rest (cdr (cdr rest)))) | |
243 | (t | |
244 | (setq rest (cdr rest))))) | |
245 | (apply 'vector all))) | |
246 | ||
247 | (defun xselect-convert-to-delete (selection type value) | |
248 | (x-disown-selection-internal selection) | |
249 | ;; A return value of nil means that we do not know how to do this conversion, | |
250 | ;; and replies with an "error". A return value of NULL means that we have | |
251 | ;; done the conversion (and any side-effects) but have no value to return. | |
252 | 'NULL) | |
253 | ||
254 | (defun xselect-convert-to-filename (selection type value) | |
6eac0de6 RS |
255 | (cond ((overlayp value) |
256 | (buffer-file-name (or (overlay-buffer value) | |
257 | (error "selection is in a killed buffer")))) | |
3109d63f ER |
258 | ((and (consp value) |
259 | (markerp (car value)) | |
260 | (markerp (cdr value))) | |
261 | (buffer-file-name (or (marker-buffer (car value)) | |
262 | (error "selection is in a killed buffer")))) | |
263 | (t nil))) | |
264 | ||
265 | (defun xselect-convert-to-charpos (selection type value) | |
266 | (let (a b tmp) | |
6eac0de6 RS |
267 | (cond ((cond ((overlayp value) |
268 | (setq a (overlay-start value) | |
269 | b (overlay-end value))) | |
3109d63f ER |
270 | ((and (consp value) |
271 | (markerp (car value)) | |
272 | (markerp (cdr value))) | |
273 | (setq a (car value) | |
274 | b (cdr value)))) | |
275 | (setq a (1- a) b (1- b)) ; zero-based | |
276 | (if (< b a) (setq tmp a a b b tmp)) | |
277 | (cons 'SPAN | |
278 | (vector (cons (ash a -16) (logand a 65535)) | |
279 | (cons (ash b -16) (logand b 65535)))))))) | |
280 | ||
281 | (defun xselect-convert-to-lineno (selection type value) | |
282 | (let (a b buf tmp) | |
283 | (cond ((cond ((and (consp value) | |
284 | (markerp (car value)) | |
285 | (markerp (cdr value))) | |
286 | (setq a (marker-position (car value)) | |
287 | b (marker-position (cdr value)) | |
288 | buf (marker-buffer (car value)))) | |
6eac0de6 RS |
289 | ((overlayp value) |
290 | (setq buf (overlay-buffer value) | |
291 | a (overlay-start value) | |
292 | b (overlay-end value))) | |
3109d63f ER |
293 | ) |
294 | (save-excursion | |
295 | (set-buffer buf) | |
296 | (setq a (count-lines 1 a) | |
297 | b (count-lines 1 b))) | |
298 | (if (< b a) (setq tmp a a b b tmp)) | |
299 | (cons 'SPAN | |
300 | (vector (cons (ash a -16) (logand a 65535)) | |
301 | (cons (ash b -16) (logand b 65535)))))))) | |
302 | ||
303 | (defun xselect-convert-to-colno (selection type value) | |
304 | (let (a b buf tmp) | |
305 | (cond ((cond ((and (consp value) | |
306 | (markerp (car value)) | |
307 | (markerp (cdr value))) | |
308 | (setq a (car value) | |
309 | b (cdr value) | |
310 | buf (marker-buffer a))) | |
6eac0de6 RS |
311 | ((overlayp value) |
312 | (setq buf (overlay-buffer value) | |
313 | a (overlay-start value) | |
314 | b (overlay-end value))) | |
3109d63f ER |
315 | ) |
316 | (save-excursion | |
317 | (set-buffer buf) | |
318 | (goto-char a) | |
319 | (setq a (current-column)) | |
320 | (goto-char b) | |
321 | (setq b (current-column))) | |
322 | (if (< b a) (setq tmp a a b b tmp)) | |
323 | (cons 'SPAN | |
324 | (vector (cons (ash a -16) (logand a 65535)) | |
325 | (cons (ash b -16) (logand b 65535)))))))) | |
326 | ||
327 | (defun xselect-convert-to-os (selection type size) | |
328 | (symbol-name system-type)) | |
329 | ||
330 | (defun xselect-convert-to-host (selection type size) | |
331 | (system-name)) | |
332 | ||
333 | (defun xselect-convert-to-user (selection type size) | |
334 | (user-full-name)) | |
335 | ||
336 | (defun xselect-convert-to-class (selection type size) | |
47a31c6b PJ |
337 | "Convert selection to class. |
338 | This function returns the string \"Emacs\"." | |
7e773fb4 | 339 | "Emacs") |
3109d63f ER |
340 | |
341 | ;; We do not try to determine the name Emacs was invoked with, | |
342 | ;; because it is not clean for a program's behavior to depend on that. | |
343 | (defun xselect-convert-to-name (selection type size) | |
47a31c6b PJ |
344 | "Convert selection to name. |
345 | This function returns the string \"emacs\"." | |
3109d63f ER |
346 | "emacs") |
347 | ||
348 | (defun xselect-convert-to-integer (selection type value) | |
349 | (and (integerp value) | |
350 | (cons (ash value -16) (logand value 65535)))) | |
351 | ||
352 | (defun xselect-convert-to-atom (selection type value) | |
353 | (and (symbolp value) value)) | |
354 | ||
355 | (defun xselect-convert-to-identity (selection type value) ; used internally | |
356 | (vector value)) | |
357 | ||
358 | (setq selection-converter-alist | |
359 | '((TEXT . xselect-convert-to-string) | |
79501c8d | 360 | (COMPOUND_TEXT . xselect-convert-to-string) |
3109d63f | 361 | (STRING . xselect-convert-to-string) |
eb1416b9 | 362 | (UTF8_STRING . xselect-convert-to-string) |
3109d63f ER |
363 | (TARGETS . xselect-convert-to-targets) |
364 | (LENGTH . xselect-convert-to-length) | |
365 | (DELETE . xselect-convert-to-delete) | |
366 | (FILE_NAME . xselect-convert-to-filename) | |
367 | (CHARACTER_POSITION . xselect-convert-to-charpos) | |
368 | (LINE_NUMBER . xselect-convert-to-lineno) | |
369 | (COLUMN_NUMBER . xselect-convert-to-colno) | |
370 | (OWNER_OS . xselect-convert-to-os) | |
371 | (HOST_NAME . xselect-convert-to-host) | |
372 | (USER . xselect-convert-to-user) | |
373 | (CLASS . xselect-convert-to-class) | |
374 | (NAME . xselect-convert-to-name) | |
375 | (ATOM . xselect-convert-to-atom) | |
376 | (INTEGER . xselect-convert-to-integer) | |
377 | (_EMACS_INTERNAL . xselect-convert-to-identity) | |
378 | )) | |
379 | ||
380 | (provide 'select) | |
381 | ||
60370d40 | 382 | ;;; select.el ends here |