Mercurial > hg > xemacs-beta
annotate src/select.c @ 5936:574f0cded429 cygwin
try to replace all nnnL or nnnUL constants with EMACS_[U]INT
author | Henry Thompson <ht@markup.co.uk> |
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date | Sun, 13 Dec 2015 13:22:58 +0000 |
parents | 79e9934779c1 |
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rev | line source |
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414 | 1 /* Generic selection processing for XEmacs |
2 Copyright (C) 1999 Free Software Foundation, Inc. | |
3 Copyright (C) 1999 Andy Piper. | |
4 | |
5 This file is part of XEmacs. | |
6 | |
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7 XEmacs is free software: you can redistribute it and/or modify it |
414 | 8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation, either version 3 of the License, or (at your |
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10 option) any later version. |
414 | 11 |
12 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 for more details. | |
16 | |
17 You should have received a copy of the GNU General Public License | |
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18 along with XEmacs. If not, see <http://www.gnu.org/licenses/>. */ |
414 | 19 |
20 /* Synched up with: Not synched with FSF. */ | |
21 | |
22 #include <config.h> | |
23 #include "lisp.h" | |
24 | |
25 #include "buffer.h" | |
872 | 26 #include "device-impl.h" |
442 | 27 #include "extents.h" |
414 | 28 #include "console.h" |
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29 #include "fontcolor.h" |
414 | 30 |
31 #include "frame.h" | |
32 #include "opaque.h" | |
33 #include "select.h" | |
34 | |
442 | 35 /* X Atoms */ |
414 | 36 Lisp_Object QPRIMARY, QSECONDARY, QSTRING, QINTEGER, QCLIPBOARD, QTIMESTAMP, |
37 QTEXT, QDELETE, QMULTIPLE, QINCR, QEMACS_TMP, QTARGETS, QATOM, QNULL, | |
38 QATOM_PAIR, QCOMPOUND_TEXT; | |
39 | |
442 | 40 /* Windows clipboard formats */ |
41 Lisp_Object QCF_TEXT, QCF_BITMAP, QCF_METAFILEPICT, QCF_SYLK, QCF_DIF, | |
42 QCF_TIFF, QCF_OEMTEXT, QCF_DIB, QCF_DIBV5, QCF_PALETTE, QCF_PENDATA, | |
43 QCF_RIFF, QCF_WAVE, QCF_UNICODETEXT, QCF_ENHMETAFILE, QCF_HDROP, QCF_LOCALE, | |
44 QCF_OWNERDISPLAY, QCF_DSPTEXT, QCF_DSPBITMAP, QCF_DSPMETAFILEPICT, | |
45 QCF_DSPENHMETAFILE; | |
46 | |
47 /* Selection strategy symbols */ | |
48 Lisp_Object Qreplace_all, Qreplace_existing; | |
49 | |
414 | 50 /* "Selection owner couldn't convert selection" */ |
51 Lisp_Object Qselection_conversion_error; | |
52 | |
442 | 53 /* A couple of Lisp functions */ |
54 Lisp_Object Qselect_convert_in, Qselect_convert_out, Qselect_coerce; | |
55 | |
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56 Lisp_Object Qlost_selection_hooks; |
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57 |
442 | 58 /* These are alists whose CARs are selection-types (whose names are the same |
59 as the names of X Atoms or Windows clipboard formats) and whose CDRs are | |
60 the names of Lisp functions to call to convert the given Emacs selection | |
61 value to a string representing the given selection type. This is for | |
62 elisp-level extension of the emacs selection handling. | |
414 | 63 */ |
442 | 64 Lisp_Object Vselection_converter_out_alist; |
65 Lisp_Object Vselection_converter_in_alist; | |
66 Lisp_Object Vselection_coercion_alist; | |
67 Lisp_Object Vselection_appender_alist; | |
68 Lisp_Object Vselection_buffer_killed_alist; | |
69 Lisp_Object Vselection_coercible_types; | |
414 | 70 |
71 Lisp_Object Vlost_selection_hooks; | |
72 | |
73 /* This is an association list whose elements are of the form | |
74 ( selection-name selection-value selection-timestamp ) | |
75 selection-name is a lisp symbol, whose name is the name of an X Atom. | |
442 | 76 selection-value is a list of cons pairs that emacs owns for that selection. |
77 Each pair consists of (type . value), where type is nil or a | |
78 selection data type, and value is any type of Lisp object. | |
414 | 79 selection-timestamp is the time at which emacs began owning this selection, |
80 as a cons of two 16-bit numbers (making a 32 bit time). | |
81 If there is an entry in this alist, then it can be assumed that emacs owns | |
82 that selection. | |
83 The only (eq) parts of this list that are visible from elisp are the | |
84 selection-values. | |
85 */ | |
86 Lisp_Object Vselection_alist; | |
87 | |
442 | 88 /* Given a selection-name and desired type, this looks up our local copy of |
89 the selection value and converts it to the type. */ | |
414 | 90 static Lisp_Object |
91 get_local_selection (Lisp_Object selection_symbol, Lisp_Object target_type) | |
92 { | |
93 Lisp_Object local_value = assq_no_quit (selection_symbol, Vselection_alist); | |
94 | |
442 | 95 if (!NILP (local_value)) |
96 { | |
97 Lisp_Object value_list = XCAR (XCDR (local_value)); | |
98 Lisp_Object value; | |
414 | 99 |
442 | 100 /* First try to find an entry of the appropriate type */ |
101 value = assq_no_quit (target_type, value_list); | |
102 | |
103 if (!NILP (value)) | |
104 return XCDR (value); | |
414 | 105 } |
106 | |
442 | 107 return Qnil; |
414 | 108 } |
109 | |
3025 | 110 /* #### Should perhaps handle `MULTIPLE'. The code below is now completely |
442 | 111 broken due to a re-organization of get_local_selection, but I've left |
112 it here should anyone show an interest - ajh */ | |
113 #if 0 | |
114 else if (CONSP (target_type) && | |
115 XCAR (target_type) == QMULTIPLE) | |
116 { | |
117 Lisp_Object pairs = XCDR (target_type); | |
118 int len = XVECTOR_LENGTH (pairs); | |
119 int i; | |
120 /* If the target is MULTIPLE, then target_type looks like | |
121 (MULTIPLE . [[SELECTION1 TARGET1] [SELECTION2 TARGET2] ... ]) | |
122 We modify the second element of each pair in the vector and | |
123 return it as [[SELECTION1 <value1>] [SELECTION2 <value2>] ... ] | |
124 */ | |
125 for (i = 0; i < len; i++) | |
126 { | |
127 Lisp_Object pair = XVECTOR_DATA (pairs) [i]; | |
128 XVECTOR_DATA (pair) [1] = | |
129 x_get_local_selection (XVECTOR_DATA (pair) [0], | |
130 XVECTOR_DATA (pair) [1]); | |
131 } | |
132 return pairs; | |
133 } | |
134 #endif | |
135 | |
136 DEFUN ("own-selection-internal", Fown_selection_internal, 2, 5, 0, /* | |
444 | 137 Give the selection SELECTION-NAME the value SELECTION-VALUE. |
138 SELECTION-NAME is a symbol, typically PRIMARY, SECONDARY, or CLIPBOARD. | |
139 SELECTION-VALUE is typically a string, or a cons of two markers, but may be | |
442 | 140 anything that the functions on selection-converter-out-alist know about. |
444 | 141 Optional arg HOW-TO-ADD specifies how the selection will be combined |
843 | 142 with any existing selection(s) - see `own-selection' for more |
143 information. | |
444 | 144 Optional arg DATA-TYPE is a window-system-specific type. |
145 Optional arg DEVICE specifies the device on which to assert the selection. | |
146 It defaults to the selected device. | |
414 | 147 */ |
442 | 148 (selection_name, selection_value, how_to_add, data_type, device)) |
414 | 149 { |
442 | 150 Lisp_Object selection_time, selection_data, prev_value = Qnil, |
151 value_list = Qnil; | |
152 Lisp_Object prev_real_value = Qnil; | |
440 | 153 struct gcpro gcpro1; |
458 | 154 int owned_p = 0; |
414 | 155 |
156 CHECK_SYMBOL (selection_name); | |
563 | 157 if (NILP (selection_value)) |
158 invalid_argument ("`selection-value' may not be nil", Qunbound); | |
414 | 159 |
160 if (NILP (device)) | |
161 device = Fselected_device (Qnil); | |
162 | |
442 | 163 if (!EQ (how_to_add, Qappend) && !EQ (how_to_add, Qt) |
164 && !EQ (how_to_add, Qreplace_existing) | |
165 && !EQ (how_to_add, Qreplace_all) && !NILP (how_to_add)) | |
563 | 166 invalid_constant ("`how-to-add' must be nil, append, replace_all, " |
167 "replace_existing or t", how_to_add); | |
442 | 168 |
169 #ifdef MULE | |
170 if (NILP (data_type)) | |
171 data_type = QCOMPOUND_TEXT; | |
172 #else | |
173 if (NILP (data_type)) | |
174 data_type = QSTRING; | |
175 #endif | |
176 | |
177 /* Examine the how-to-add argument */ | |
178 if (EQ (how_to_add, Qreplace_all) || NILP (how_to_add)) | |
179 { | |
180 Lisp_Object local_selection_data = assq_no_quit (selection_name, | |
181 Vselection_alist); | |
182 | |
183 if (!NILP (local_selection_data)) | |
184 { | |
458 | 185 owned_p = 1; |
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186 Vselection_alist |
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187 = delq_no_quit (local_selection_data, Vselection_alist); |
442 | 188 } |
189 } | |
190 else | |
191 { | |
192 /* Look for a previous value */ | |
193 prev_value = assq_no_quit (selection_name, Vselection_alist); | |
194 | |
195 if (!NILP (prev_value)) | |
458 | 196 { |
197 owned_p = 1; | |
198 value_list = XCAR (XCDR (prev_value)); | |
199 } | |
440 | 200 |
442 | 201 if (!NILP (value_list)) |
202 prev_real_value = assq_no_quit (data_type, value_list); | |
203 } | |
204 | |
205 /* Append values if necessary */ | |
206 if (!NILP (value_list) && (EQ (how_to_add, Qappend) || EQ (how_to_add, Qt))) | |
414 | 207 { |
442 | 208 /* Did we have anything of this type previously? */ |
209 if (!NILP (prev_real_value)) | |
210 { | |
211 if ((NILP (data_type) && STRINGP (selection_value) | |
212 && STRINGP (XCDR (prev_real_value))) | |
213 || !NILP (data_type)) | |
214 { | |
215 Lisp_Object function = assq_no_quit (data_type, | |
216 Vselection_appender_alist); | |
217 | |
218 if (NILP (function)) | |
563 | 219 signal_error (Qinvalid_argument, |
220 "Cannot append selections of supplied types (no function)", | |
221 data_type); | |
442 | 222 |
223 function = XCDR (function); | |
224 | |
225 selection_value = call4 (function, | |
226 selection_name, | |
227 data_type, | |
228 XCDR (prev_real_value), | |
229 selection_value); | |
230 | |
231 if (NILP (selection_value)) | |
563 | 232 signal_error (Qinvalid_argument, |
233 "Cannot append selections of supplied types (function returned nil)", | |
234 data_type); | |
442 | 235 } |
236 else | |
563 | 237 signal_error_2 (Qinvalid_argument, "Cannot append selections of supplied types (data type nil and both values not strings)", |
238 XCDR (prev_real_value), | |
239 selection_value); | |
442 | 240 } |
241 | |
242 selection_data = Fcons (data_type, selection_value); | |
243 value_list = Fcons (selection_data, value_list); | |
244 } | |
245 | |
246 if (!NILP (prev_real_value)) | |
247 { | |
248 Lisp_Object rest; /* We know it isn't the CAR, so it's easy. */ | |
249 | |
250 /* Delete the old type entry from the list */ | |
251 for (rest = value_list; !NILP (rest); rest = Fcdr (rest)) | |
252 if (EQ (prev_real_value, Fcar (XCDR (rest)))) | |
414 | 253 { |
254 XCDR (rest) = Fcdr (XCDR (rest)); | |
255 break; | |
256 } | |
257 } | |
442 | 258 else |
259 { | |
260 value_list = Fcons (Fcons (data_type, selection_value), | |
261 value_list); | |
262 } | |
414 | 263 |
442 | 264 /* Complete the local cache update; note that we destructively |
265 modify the current list entry if there is one */ | |
266 if (NILP (prev_value)) | |
267 { | |
268 selection_data = list3 (selection_name, value_list, Qnil); | |
269 Vselection_alist = Fcons (selection_data, Vselection_alist); | |
270 } | |
271 else | |
272 { | |
273 selection_data = prev_value; | |
274 Fsetcar (XCDR (selection_data), value_list); | |
275 } | |
276 | |
277 GCPRO1 (selection_data); | |
278 | |
279 /* have to do device specific stuff last so that methods can access the | |
414 | 280 selection_alist */ |
2620 | 281 |
282 /* If you are re-implementing this for another redisplay type, either make | |
283 certain that the selection time will fit within thirty-two bits, or | |
284 redesign get-xemacs-selection-timestamp to return, say, a bignum, and | |
285 convert the device-specific timestamp to a bignum before storing it in | |
286 this list. The current practice is to blindly assume that the timestamp | |
287 is thirty-two bits, which will work for extant architectures. */ | |
288 | |
414 | 289 if (HAS_DEVMETH_P (XDEVICE (device), own_selection)) |
290 selection_time = DEVMETH (XDEVICE (device), own_selection, | |
442 | 291 (selection_name, selection_value, |
458 | 292 how_to_add, data_type, owned_p)); |
414 | 293 else |
294 selection_time = Qnil; | |
295 | |
296 Fsetcar (XCDR (XCDR (selection_data)), selection_time); | |
297 | |
440 | 298 UNGCPRO; |
299 | |
414 | 300 return selection_value; |
301 } | |
302 | |
442 | 303 DEFUN ("register-selection-data-type", Fregister_selection_data_type, 1,2,0, /* |
304 Register a new selection data type DATA-TYPE, optionally on the specified | |
305 DEVICE. Returns the device-specific data type identifier, or nil if the | |
306 device does not support this feature or the registration fails. */ | |
307 (data_type, device)) | |
308 { | |
309 /* Check arguments */ | |
310 CHECK_STRING (data_type); | |
311 | |
312 if (NILP (device)) | |
313 device = Fselected_device (Qnil); | |
314 | |
315 if (HAS_DEVMETH_P (XDEVICE (device), register_selection_data_type)) | |
316 return DEVMETH (XDEVICE (device), register_selection_data_type, | |
317 (data_type)); | |
318 else | |
319 return Qnil; | |
320 } | |
321 | |
322 DEFUN ("selection-data-type-name", Fselection_data_type_name, 1, 2, 0, /* | |
323 Retrieve the name of the specified selection data type DATA-TYPE, optionally | |
324 on the specified DEVICE. Returns either a string or a symbol on success, and | |
325 nil if the device does not support this feature or the type is not known. */ | |
326 (data_type, device)) | |
327 { | |
328 if (NILP (device)) | |
329 device = Fselected_device (Qnil); | |
330 | |
331 if (HAS_DEVMETH_P (XDEVICE (device), selection_data_type_name)) | |
332 return DEVMETH (XDEVICE (device), selection_data_type_name, (data_type)); | |
333 else | |
334 return Qnil; | |
335 } | |
336 | |
337 DEFUN ("available-selection-types", Favailable_selection_types, 1, 2, 0, /* | |
338 Retrieve a list of currently available types of selection associated with | |
339 the given SELECTION-NAME, optionally on the specified DEVICE. This list | |
340 does not take into account any possible conversions that might take place, | |
341 so it should be taken as a minimal estimate of what is available. | |
342 */ | |
343 (selection_name, device)) | |
344 { | |
345 Lisp_Object types = Qnil, rest; | |
346 struct gcpro gcpro1; | |
347 | |
348 CHECK_SYMBOL (selection_name); | |
349 | |
350 if (NILP (device)) | |
351 device = Fselected_device (Qnil); | |
352 | |
353 GCPRO1 (types); | |
354 | |
355 /* First check the device */ | |
356 if (HAS_DEVMETH_P (XDEVICE (device), available_selection_types)) | |
357 types = DEVMETH (XDEVICE (device), available_selection_types, | |
358 (selection_name)); | |
359 | |
360 /* Now look in the list */ | |
361 rest = assq_no_quit (selection_name, Vselection_alist); | |
362 | |
363 if (NILP (rest)) | |
364 { | |
365 UNGCPRO; | |
366 | |
367 return types; | |
368 } | |
369 | |
370 /* Examine the types and cons them onto the front of the list */ | |
371 for (rest = XCAR (XCDR (rest)); !NILP (rest); rest = XCDR (rest)) | |
372 { | |
373 Lisp_Object value = XCDR (XCAR (rest)); | |
374 Lisp_Object type = XCAR (XCAR (rest)); | |
375 | |
376 types = Fcons (type, types); | |
377 | |
378 if ((STRINGP (value) || EXTENTP (value)) | |
379 && (NILP (type) || EQ (type, QSTRING) | |
380 || EQ (type, QTEXT) || EQ (type, QCOMPOUND_TEXT))) | |
381 types = Fcons (QTEXT, Fcons (QCOMPOUND_TEXT, Fcons (QSTRING, types))); | |
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382 else if (FIXNUMP (value) && NILP (type)) |
442 | 383 types = Fcons (QINTEGER, types); |
384 else if (SYMBOLP (value) && NILP (type)) | |
385 types = Fcons (QATOM, types); | |
386 } | |
387 | |
388 UNGCPRO; | |
389 | |
390 return types; | |
391 } | |
392 | |
414 | 393 /* remove a selection from our local copy |
394 */ | |
395 void | |
396 handle_selection_clear (Lisp_Object selection_symbol) | |
397 { | |
442 | 398 Lisp_Object local_selection_data = assq_no_quit (selection_symbol, |
399 Vselection_alist); | |
414 | 400 |
401 /* Well, we already believe that we don't own it, so that's just fine. */ | |
402 if (NILP (local_selection_data)) return; | |
403 | |
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404 /* Otherwise, we're really honest and truly being told to drop it. */ |
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405 Vselection_alist = delq_no_quit (local_selection_data, Vselection_alist); |
414 | 406 |
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407 /* Let random lisp code notice that the selection has been stolen. */ |
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408 va_run_hook_with_args (Qlost_selection_hooks, 1, selection_symbol); |
414 | 409 } |
410 | |
411 DEFUN ("disown-selection-internal", Fdisown_selection_internal, 1, 3, 0, /* | |
412 If we own the named selection, then disown it (make there be no selection). | |
413 */ | |
414 (selection_name, selection_time, device)) | |
415 { | |
416 if (NILP (assq_no_quit (selection_name, Vselection_alist))) | |
417 return Qnil; /* Don't disown the selection when we're not the owner. */ | |
418 | |
419 if (NILP (device)) | |
420 device = Fselected_device (Qnil); | |
421 | |
422 MAYBE_DEVMETH (XDEVICE (device), disown_selection, | |
423 (selection_name, selection_time)); | |
442 | 424 |
414 | 425 handle_selection_clear (selection_name); |
426 | |
427 return Qt; | |
428 } | |
429 | |
430 DEFUN ("selection-owner-p", Fselection_owner_p, 0, 1, 0, /* | |
444 | 431 Return t if the current emacs process owns SELECTION. |
432 SELECTION should be the name of the selection in question, typically one of | |
414 | 433 the symbols PRIMARY, SECONDARY, or CLIPBOARD. (For convenience, the symbol |
434 nil is the same as PRIMARY, and t is the same as SECONDARY.) | |
435 */ | |
436 (selection)) | |
437 { | |
438 CHECK_SYMBOL (selection); | |
439 if (EQ (selection, Qnil)) selection = QPRIMARY; | |
440 else if (EQ (selection, Qt)) selection = QSECONDARY; | |
441 | |
442 return NILP (Fassq (selection, Vselection_alist)) ? Qnil : Qt; | |
443 } | |
444 | |
442 | 445 DEFUN ("selection-exists-p", Fselection_exists_p, 0, 3, 0, /* |
444 | 446 Whether there is currently an owner for SELECTION. |
447 SELECTION should be the name of the selection in question, typically one of | |
414 | 448 the symbols PRIMARY, SECONDARY, or CLIPBOARD. (For convenience, the symbol |
449 nil is the same as PRIMARY, and t is the same as SECONDARY.) | |
444 | 450 Optionally, the window-system DATA-TYPE and the DEVICE may be specified. |
414 | 451 */ |
442 | 452 (selection, data_type, device)) |
414 | 453 { |
454 CHECK_SYMBOL (selection); | |
442 | 455 if (NILP (data_type) |
456 && !NILP (Fselection_owner_p (selection))) | |
414 | 457 return Qt; |
458 | |
459 if (NILP (device)) | |
460 device = Fselected_device (Qnil); | |
461 | |
462 return HAS_DEVMETH_P (XDEVICE (device), selection_exists_p) ? | |
442 | 463 DEVMETH (XDEVICE (device), selection_exists_p, (selection, data_type)) |
414 | 464 : Qnil; |
465 } | |
466 | |
2620 | 467 Lisp_Object |
468 get_selection_raw_time(Lisp_Object selection) | |
469 { | |
470 Lisp_Object local_value = assq_no_quit (selection, Vselection_alist); | |
471 | |
472 if (!NILP (local_value)) | |
473 { | |
474 return XCAR (XCDR (XCDR (local_value))); | |
475 } | |
476 return Qnil; | |
477 } | |
478 | |
442 | 479 /* Get the timestamp of the given selection */ |
2620 | 480 DEFUN ("get-xemacs-selection-timestamp", Fget_selection_timestamp, 1, 1, 0, /* |
2757 | 481 Return timestamp for SELECTION, if it belongs to XEmacs and exists. |
2620 | 482 |
483 The timestamp is a cons of two integers, the first being the higher-order | |
484 sixteen bits of the device-specific thirty-two-bit quantity, the second | |
485 being the lower-order sixteen bits of same. Expect to see this API change | |
486 when and if redisplay on a window system with timestamps wider than 32bits | |
487 happens. | |
442 | 488 */ |
489 (selection)) | |
490 { | |
2620 | 491 Lisp_Object val = get_selection_raw_time(selection); |
442 | 492 |
2620 | 493 if (!NILP (val)) |
494 { | |
495 return word_to_lisp(* (UINT_32_BIT *) XOPAQUE_DATA (val)); | |
496 } | |
442 | 497 |
498 return Qnil; | |
499 } | |
500 | |
414 | 501 /* Request the selection value from the owner. If we are the owner, |
843 | 502 simply return our selection value. If we are not the owner, this |
503 will block until all of the data has arrived. | |
414 | 504 */ |
505 DEFUN ("get-selection-internal", Fget_selection_internal, 2, 3, 0, /* | |
506 Return text selected from some window-system window. | |
444 | 507 SELECTION is a symbol, typically PRIMARY, SECONDARY, or CLIPBOARD. |
508 TARGET-TYPE is the type of data desired, typically STRING or COMPOUND_TEXT. | |
414 | 509 Under Mule, if the resultant data comes back as 8-bit data in type |
510 TEXT or COMPOUND_TEXT, it will be decoded as Compound Text. | |
511 */ | |
444 | 512 (selection, target_type, device)) |
414 | 513 { |
514 /* This function can GC */ | |
515 Lisp_Object val = Qnil; | |
516 struct gcpro gcpro1, gcpro2; | |
442 | 517 GCPRO2 (target_type, val); |
444 | 518 CHECK_SYMBOL (selection); |
414 | 519 |
520 if (NILP (device)) | |
521 device = Fselected_device (Qnil); | |
522 | |
442 | 523 #ifdef MULE |
524 if (NILP (target_type)) | |
525 target_type = QCOMPOUND_TEXT; | |
526 #else | |
527 if (NILP (target_type)) | |
528 target_type = QSTRING; | |
529 #endif | |
530 | |
414 | 531 #if 0 /* #### MULTIPLE doesn't work yet and probably never will */ |
532 if (CONSP (target_type) && | |
533 XCAR (target_type) == QMULTIPLE) | |
534 { | |
535 CHECK_VECTOR (XCDR (target_type)); | |
536 /* So we don't destructively modify this... */ | |
537 target_type = copy_multiple_data (target_type); | |
538 } | |
539 #endif | |
442 | 540 |
541 /* Used to check that target_type was a symbol. This is no longer | |
542 necessarily the case, because the type might be registered with | |
543 the device (in which case target_type would be a device-specific | |
544 identifier - probably an integer) - ajh */ | |
414 | 545 |
444 | 546 val = get_local_selection (selection, target_type); |
414 | 547 |
442 | 548 if (!NILP (val)) |
414 | 549 { |
442 | 550 /* If we get something from the local cache, we may need to convert |
551 it slightly - to do this, we call select-coerce */ | |
843 | 552 val = call3 (Qselect_coerce, selection, target_type, val); |
442 | 553 } |
554 else if (HAS_DEVMETH_P (XDEVICE (device), get_foreign_selection)) | |
555 { | |
556 /* Nothing in the local cache; try the window system */ | |
414 | 557 val = DEVMETH (XDEVICE (device), get_foreign_selection, |
444 | 558 (selection, target_type)); |
414 | 559 } |
442 | 560 |
561 if (NILP (val)) | |
414 | 562 { |
442 | 563 /* Still nothing. Try coercion. */ |
564 | |
565 /* Try looking in selection-coercible-types to see if any of | |
566 them are present for this selection. We try them *in order*; | |
567 the first for which a conversion succeeds gets returned. */ | |
568 EXTERNAL_LIST_LOOP_2 (element, Vselection_coercible_types) | |
414 | 569 { |
444 | 570 val = get_local_selection (selection, element); |
442 | 571 |
572 if (NILP (val)) | |
573 continue; | |
574 | |
444 | 575 val = call3 (Qselect_coerce, selection, target_type, val); |
442 | 576 |
577 if (!NILP (val)) | |
578 break; | |
414 | 579 } |
580 } | |
442 | 581 |
582 /* Used to call clean_local_selection here... but that really belonged | |
583 in Lisp (so the equivalent is now built-in to the INTEGER conversion | |
584 function select-convert-from-integer) - ajh */ | |
585 | |
414 | 586 UNGCPRO; |
587 return val; | |
588 } | |
589 | |
442 | 590 /* These are convenient interfaces to the lisp code in select.el; |
591 this way we can rename them easily rather than having to hunt everywhere. | |
592 Also, this gives us access to get_local_selection so that convert_out | |
593 can retrieve the internal selection value automatically if passed a | |
594 value of Qnil. */ | |
595 Lisp_Object | |
596 select_convert_in (Lisp_Object selection, | |
597 Lisp_Object type, | |
598 Lisp_Object value) | |
599 { | |
600 return call3 (Qselect_convert_in, selection, type, value); | |
601 } | |
602 | |
603 Lisp_Object | |
604 select_coerce (Lisp_Object selection, | |
605 Lisp_Object type, | |
606 Lisp_Object value) | |
607 { | |
608 return call3 (Qselect_coerce, selection, type, value); | |
609 } | |
610 | |
611 Lisp_Object | |
612 select_convert_out (Lisp_Object selection, | |
613 Lisp_Object type, | |
614 Lisp_Object value) | |
615 { | |
616 if (NILP (value)) | |
617 value = get_local_selection (selection, type); | |
618 | |
619 if (NILP (value)) | |
620 { | |
621 /* Try looking in selection-coercible-types to see if any of | |
622 them are present for this selection. We try them *in order*; | |
623 the first for which a conversion succeeds gets returned. */ | |
624 EXTERNAL_LIST_LOOP_2 (element, Vselection_coercible_types) | |
625 { | |
626 Lisp_Object ret; | |
627 | |
628 value = get_local_selection (selection, element); | |
629 | |
630 if (NILP (value)) | |
631 continue; | |
632 | |
633 ret = call3 (Qselect_convert_out, selection, type, value); | |
634 | |
635 if (!NILP (ret)) | |
636 return ret; | |
637 } | |
638 | |
639 return Qnil; | |
640 } | |
641 | |
642 return call3 (Qselect_convert_out, selection, type, value); | |
643 } | |
644 | |
645 | |
646 /* Gets called from kill-buffer; this lets us dispose of buffer-dependent | |
647 selections (or alternatively make them independent of the buffer) when | |
648 it gets vaped. */ | |
649 void | |
650 select_notify_buffer_kill (Lisp_Object buffer) | |
651 { | |
652 Lisp_Object rest; | |
653 struct gcpro gcpro1, gcpro2, gcpro3; | |
654 | |
655 /* For each element of Vselection_alist */ | |
656 for (rest = Vselection_alist; | |
657 !NILP (rest);) | |
658 { | |
659 Lisp_Object selection, values, prev = Qnil; | |
660 | |
661 selection = XCAR (rest); | |
662 | |
663 for (values = XCAR (XCDR (selection)); | |
664 !NILP (values); | |
665 values = XCDR (values)) | |
666 { | |
667 Lisp_Object value, handler_fn; | |
668 | |
669 /* Extract the (type . value) pair. */ | |
670 value = XCAR (values); | |
671 | |
672 /* Find the handler function (if any). */ | |
673 handler_fn = Fcdr (Fassq (XCAR (value), | |
674 Vselection_buffer_killed_alist)); | |
675 | |
676 if (!NILP (handler_fn)) | |
677 { | |
678 Lisp_Object newval; | |
679 | |
680 /* Protect ourselves, just in case some tomfool calls | |
681 own-selection from with the buffer-killed handler, then | |
682 causes a GC. Just as a note, *don't do this*. */ | |
683 GCPRO3 (rest, values, value); | |
684 | |
685 newval = call4 (handler_fn, XCAR (selection), XCAR (value), | |
686 XCDR (value), buffer); | |
687 | |
688 UNGCPRO; | |
689 | |
690 /* Set or delete the value (by destructively modifying | |
691 the list). */ | |
692 if (!NILP (newval)) | |
693 { | |
694 Fsetcdr (value, newval); | |
695 | |
696 prev = values; | |
697 } | |
698 else | |
699 { | |
700 if (NILP (prev)) | |
701 Fsetcar (XCDR (selection), XCDR (values)); | |
702 else | |
703 Fsetcdr (prev, XCDR (values)); | |
704 } | |
705 } | |
706 else | |
707 prev = values; | |
708 } | |
709 | |
710 /* If we have no values for this selection */ | |
711 if (NILP (XCAR (XCDR (selection)))) | |
712 { | |
713 /* Move on to the next element *first* */ | |
714 rest = XCDR (rest); | |
715 | |
716 /* Protect it and disown this selection */ | |
717 GCPRO1 (rest); | |
718 | |
719 Fdisown_selection_internal (XCAR (selection), Qnil, Qnil); | |
720 | |
721 UNGCPRO; | |
722 } | |
723 else | |
724 rest = XCDR (rest); | |
725 } | |
726 } | |
727 | |
728 | |
414 | 729 void |
730 syms_of_select (void) | |
731 { | |
732 DEFSUBR (Fown_selection_internal); | |
733 DEFSUBR (Fget_selection_internal); | |
442 | 734 DEFSUBR (Fget_selection_timestamp); |
414 | 735 DEFSUBR (Fselection_exists_p); |
736 DEFSUBR (Fdisown_selection_internal); | |
737 DEFSUBR (Fselection_owner_p); | |
442 | 738 DEFSUBR (Favailable_selection_types); |
739 DEFSUBR (Fregister_selection_data_type); | |
740 DEFSUBR (Fselection_data_type_name); | |
414 | 741 |
442 | 742 /* Lisp Functions */ |
563 | 743 DEFSYMBOL (Qselect_convert_in); |
744 DEFSYMBOL (Qselect_convert_out); | |
745 DEFSYMBOL (Qselect_coerce); | |
442 | 746 |
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747 DEFSYMBOL (Qlost_selection_hooks); |
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748 |
442 | 749 /* X Atoms */ |
563 | 750 DEFSYMBOL (QPRIMARY); |
751 DEFSYMBOL (QSECONDARY); | |
752 DEFSYMBOL (QSTRING); | |
753 DEFSYMBOL (QINTEGER); | |
754 DEFSYMBOL (QCLIPBOARD); | |
755 DEFSYMBOL (QTIMESTAMP); | |
756 DEFSYMBOL (QTEXT); | |
757 DEFSYMBOL (QDELETE); | |
758 DEFSYMBOL (QMULTIPLE); | |
759 DEFSYMBOL (QINCR); | |
414 | 760 defsymbol (&QEMACS_TMP, "_EMACS_TMP_"); |
563 | 761 DEFSYMBOL (QTARGETS); |
762 DEFSYMBOL (QATOM); | |
414 | 763 defsymbol (&QATOM_PAIR, "ATOM_PAIR"); |
764 defsymbol (&QCOMPOUND_TEXT, "COMPOUND_TEXT"); | |
563 | 765 DEFSYMBOL (QNULL); |
414 | 766 |
442 | 767 /* Windows formats - these all start with CF_ */ |
768 defsymbol (&QCF_TEXT, "CF_TEXT"); | |
769 defsymbol (&QCF_BITMAP, "CF_BITMAP"); | |
770 defsymbol (&QCF_METAFILEPICT, "CF_METAFILEPICT"); | |
771 defsymbol (&QCF_SYLK, "CF_SYLK"); | |
772 defsymbol (&QCF_DIF, "CF_DIF"); | |
773 defsymbol (&QCF_TIFF, "CF_TIFF"); | |
774 defsymbol (&QCF_OEMTEXT, "CF_OEMTEXT"); | |
775 defsymbol (&QCF_DIB, "CF_DIB"); | |
776 defsymbol (&QCF_DIBV5, "CF_DIBV5"); | |
777 defsymbol (&QCF_PALETTE, "CF_PALETTE"); | |
778 defsymbol (&QCF_PENDATA, "CF_PENDATA"); | |
779 defsymbol (&QCF_RIFF, "CF_RIFF"); | |
780 defsymbol (&QCF_WAVE, "CF_WAVE"); | |
781 defsymbol (&QCF_UNICODETEXT, "CF_UNICODETEXT"); | |
782 defsymbol (&QCF_ENHMETAFILE, "CF_ENHMETAFILE"); | |
783 defsymbol (&QCF_HDROP, "CF_HDROP"); | |
784 defsymbol (&QCF_LOCALE, "CF_LOCALE"); | |
785 defsymbol (&QCF_OWNERDISPLAY, "CF_OWNERDISPLAY"); | |
786 defsymbol (&QCF_DSPTEXT, "CF_DSPTEXT"); | |
787 defsymbol (&QCF_DSPBITMAP, "CF_DSPBITMAP"); | |
788 defsymbol (&QCF_DSPMETAFILEPICT, "CF_DSPMETAFILEPICT"); | |
789 defsymbol (&QCF_DSPENHMETAFILE, "CF_DSPENHMETAFILE"); | |
790 | |
791 /* Selection strategies */ | |
563 | 792 DEFSYMBOL (Qreplace_all); |
793 DEFSYMBOL (Qreplace_existing); | |
442 | 794 |
563 | 795 DEFERROR_STANDARD (Qselection_conversion_error, Qconversion_error); |
414 | 796 } |
797 | |
798 void | |
799 vars_of_select (void) | |
800 { | |
801 Vselection_alist = Qnil; | |
802 staticpro (&Vselection_alist); | |
803 | |
442 | 804 DEFVAR_LISP ("selection-converter-alist", &Vselection_converter_out_alist /* |
805 An alist associating selection-types (such as STRING and TIMESTAMP) with | |
806 functions. This is an alias for `selection-converter-out-alist', and should | |
807 be considered obsolete. Use the new name instead. */ ); | |
808 | |
809 DEFVAR_LISP ("selection-converter-out-alist", | |
810 &Vselection_converter_out_alist /* | |
414 | 811 An alist associating selection-types (such as STRING and TIMESTAMP) with |
812 functions. These functions will be called with three args: the name | |
813 of the selection (typically PRIMARY, SECONDARY, or CLIPBOARD); a | |
814 desired type to which the selection should be converted; and the local | |
442 | 815 selection value (whatever had been passed to `own-selection'). |
816 | |
817 The return type of these functions depends upon the device in question; | |
818 for mswindows, a string should be returned containing data in the requested | |
819 format, or nil to indicate that the conversion could not be done. Additionally, | |
820 it is permissible to return a cons of the form (DATA-TYPE . STRING) suggesting | |
821 a new data type to use instead. | |
822 | |
823 For X, the return value should be one of: | |
414 | 824 |
825 -- nil (the conversion could not be done) | |
826 -- a cons of a symbol and any of the following values; the symbol | |
827 explicitly specifies the type that will be sent. | |
828 -- a string (If the type is not specified, then if Mule support exists, | |
829 the string will be converted to Compound Text and sent in | |
3025 | 830 the `COMPOUND_TEXT' format; otherwise (no Mule support), |
831 the string will be left as-is and sent in the `STRING' | |
414 | 832 format. If the type is specified, the string will be |
833 left as-is (or converted to binary format under Mule). | |
834 In all cases, 8-bit data it sent.) | |
835 -- a character (With Mule support, will be converted to Compound Text | |
836 whether or not a type is specified. If a type is not | |
3025 | 837 specified, a type of `STRING' or `COMPOUND_TEXT' will be |
414 | 838 sent, as for strings.) |
3025 | 839 -- the symbol `NULL' (Indicates that there is no meaningful return value. |
840 Empty 32-bit data with a type of `NULL' will be sent.) | |
414 | 841 -- a symbol (Will be converted into an atom. If the type is not specified, |
3025 | 842 a type of `ATOM' will be sent.) |
414 | 843 -- an integer (Will be converted into a 16-bit or 32-bit integer depending |
844 on the value. If the type is not specified, a type of | |
3025 | 845 `INTEGER' will be sent.) |
414 | 846 -- a cons (HIGH . LOW) of integers (Will be converted into a 32-bit integer. |
847 If the type is not specified, a type of | |
3025 | 848 `INTEGER' will be sent.) |
414 | 849 -- a vector of symbols (Will be converted into a list of atoms. If the type |
3025 | 850 is not specified, a type of `ATOM' will be sent.) |
414 | 851 -- a vector of integers (Will be converted into a list of 16-bit integers. |
3025 | 852 If the type is not specified, a type of `INTEGER' |
414 | 853 will be sent.) |
854 -- a vector of integers and/or conses (HIGH . LOW) of integers | |
855 (Will be converted into a list of 16-bit integers. | |
3025 | 856 If the type is not specified, a type of `INTEGER' |
442 | 857 will be sent.) |
858 */ ); | |
859 Vselection_converter_out_alist = Qnil; | |
860 | |
861 DEFVAR_LISP ("selection-converter-in-alist", | |
862 &Vselection_converter_in_alist /* | |
863 An alist associating selection-types (such as STRING and TIMESTAMP) with | |
864 functions. These functions will be called with three args: the name | |
865 of the selection (typically PRIMARY, SECONDARY or CLIPBOARD); the | |
866 type from which the selection should be converted; and the selection | |
867 value. These functions should return a suitable representation of the | |
868 value, or nil to indicate that the conversion was not possible. | |
869 | |
870 See also `selection-converter-out-alist'. */ ); | |
871 Vselection_converter_in_alist = Qnil; | |
872 | |
873 DEFVAR_LISP ("selection-coercion-alist", | |
874 &Vselection_coercion_alist /* | |
875 An alist associating selection-types (such as STRING and TIMESTAMP) with | |
876 functions. These functions will be called with three args; the name | |
877 of the selection (typically PRIMARY, SECONDARY or CLIPBOARD); the type | |
878 from which the selection should be converted, and the selection value. | |
879 The value passed will be *exactly the same value* that was given to | |
880 `own-selection'; it should be converted into something suitable for | |
881 return to a program calling `get-selection' with the appropriate | |
882 parameters. | |
883 | |
884 See also `selection-converter-in-alist' and | |
885 `selection-converter-out-alist'. */); | |
886 Vselection_coercion_alist = Qnil; | |
887 | |
888 DEFVAR_LISP ("selection-appender-alist", | |
889 &Vselection_appender_alist /* | |
890 An alist associating selection-types (such as STRING and TIMESTAMP) with | |
891 functions. These functions will be called with four args; the name | |
892 of the selection (typically PRIMARY, SECONDARY or CLIPBOARD); the type | |
893 of the selection; and two selection values. The functions are expected to | |
894 return a value representing the catenation of the two values, or nil to | |
895 indicate that this was not possible. */ ); | |
896 Vselection_appender_alist = Qnil; | |
897 | |
898 DEFVAR_LISP ("selection-buffer-killed-alist", | |
899 &Vselection_buffer_killed_alist /* | |
900 An alist associating selection-types (such as STRING and TIMESTAMP) with | |
901 functions. These functions will be called whenever a buffer is killed, | |
902 with four args: the name of the selection (typically PRIMARY, SECONDARY | |
903 or CLIPBOARD); the type of the selection; the value of the selection; and | |
904 the buffer that has just been killed. These functions should return a new | |
905 selection value, or nil to indicate that the selection value should be | |
906 deleted. */ ); | |
907 Vselection_buffer_killed_alist = Qnil; | |
908 | |
909 DEFVAR_LISP ("selection-coercible-types", | |
910 &Vselection_coercible_types /* | |
911 A list of selection types that are coercible---that is, types that may be | |
912 automatically converted to another type. Selection values with types in this | |
913 list may be subject to conversion attempts to other types. */ ); | |
914 Vselection_coercible_types = Qnil; | |
414 | 915 |
916 DEFVAR_LISP ("lost-selection-hooks", &Vlost_selection_hooks /* | |
917 A function or functions to be called after we have been notified | |
918 that we have lost the selection. The function(s) will be called with one | |
919 argument, a symbol naming the selection (typically PRIMARY, SECONDARY, or | |
920 CLIPBOARD). | |
921 */ ); | |
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922 Vlost_selection_hooks = Qnil; |
414 | 923 } |