Mercurial > hg > xemacs-beta
annotate src/select-gtk.c @ 5609:3152c2c21461
Correct and clarify docstring, #'load-time-value
lisp/ChangeLog addition:
2011-12-09 Aidan Kehoe <kehoea@parhasard.net>
* cl-macs.el (load-time-value):
Clarify the docstring here, thanks for pointing out its inaccuracy
Julian Bradfield.
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Fri, 09 Dec 2011 08:38:07 +0000 |
| parents | 56144c8593a8 |
| children | 79e9934779c1 |
| rev | line source |
|---|---|
| 462 | 1 /* GTK selection processing for XEmacs |
| 2 Copyright (C) 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc. | |
| 771 | 3 Copyright (C) 2001 Ben Wing. |
| 462 | 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 |
| 462 | 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. |
| 462 | 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/>. */ |
| 462 | 19 |
| 20 /* Synched up with: Not synched with FSF. */ | |
| 21 | |
| 22 /* Authorship: | |
| 23 | |
| 24 Written by Kevin Gallo for FSF Emacs. | |
| 25 Rewritten for mswindows by Jonathan Harris, December 1997 for 21.0. | |
| 26 Rewritten for GTK by William Perry, April 2000 for 21.1 | |
| 27 */ | |
| 28 | |
| 29 | |
| 30 #include <config.h> | |
| 31 #include "lisp.h" | |
| 872 | 32 |
| 462 | 33 #include "buffer.h" |
| 872 | 34 #include "device-impl.h" |
| 35 #include "events.h" | |
| 36 #include "frame.h" | |
| 37 #include "opaque.h" | |
| 462 | 38 #include "select.h" |
| 872 | 39 |
| 40 #include "console-gtk-impl.h" | |
| 462 | 41 |
| 42 static Lisp_Object Vretrieved_selection; | |
| 43 static gboolean waiting_for_selection; | |
| 44 Lisp_Object Vgtk_sent_selection_hooks; | |
| 45 | |
| 778 | 46 extern int lisp_to_time (Lisp_Object, time_t *); |
| 47 extern Lisp_Object time_to_lisp (time_t); | |
| 48 | |
| 647 | 49 static GdkAtom |
| 2286 | 50 symbol_to_gtk_atom (struct device *UNUSED (d), Lisp_Object sym, |
| 51 int only_if_exists) | |
| 647 | 52 { |
| 53 if (NILP (sym)) return GDK_SELECTION_PRIMARY; | |
| 54 if (EQ (sym, Qt)) return GDK_SELECTION_SECONDARY; | |
| 55 if (EQ (sym, QPRIMARY)) return GDK_SELECTION_PRIMARY; | |
| 56 if (EQ (sym, QSECONDARY)) return GDK_SELECTION_SECONDARY; | |
| 57 | |
| 58 { | |
| 59 const Extbyte *nameext; | |
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60 nameext = LISP_STRING_TO_EXTERNAL (Fsymbol_name (sym), Qctext); |
| 647 | 61 return gdk_atom_intern (nameext, only_if_exists ? TRUE : FALSE); |
| 62 } | |
| 63 } | |
| 462 | 64 |
| 647 | 65 static Lisp_Object |
| 2286 | 66 atom_to_symbol (struct device *UNUSED (d), GdkAtom atom) |
| 647 | 67 { |
| 68 if (atom == GDK_SELECTION_PRIMARY) return (QPRIMARY); | |
| 69 if (atom == GDK_SELECTION_SECONDARY) return (QSECONDARY); | |
| 70 | |
| 71 { | |
| 867 | 72 Ibyte *intstr; |
| 647 | 73 Extbyte *str = gdk_atom_name (atom); |
| 74 | |
| 75 if (! str) return Qnil; | |
| 462 | 76 |
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77 intstr = EXTERNAL_TO_ITEXT (str, Qctext); |
| 647 | 78 g_free (str); |
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79 return intern_istring (intstr); |
| 647 | 80 } |
| 81 } | |
| 82 | |
| 4984 | 83 #define THIS_IS_GTK |
| 84 #include "select-xlike-inc.c" | |
| 85 #undef THIS_IS_GTK | |
| 647 | 86 |
| 87 | |
| 462 | 88 /* Set the selection data to GDK_NONE and NULL data, meaning we were |
| 89 ** unable to do what they wanted. | |
| 90 */ | |
| 91 static void | |
| 92 gtk_decline_selection_request (GtkSelectionData *data) | |
| 93 { | |
| 94 gtk_selection_data_set (data, GDK_NONE, 0, NULL, 0); | |
| 95 } | |
| 96 | |
| 97 /* Used as an unwind-protect clause so that, if a selection-converter signals | |
| 98 an error, we tell the requestor that we were unable to do what they wanted | |
| 99 before we throw to top-level or go into the debugger or whatever. | |
| 100 */ | |
| 101 struct _selection_closure | |
| 102 { | |
| 103 GtkSelectionData *data; | |
| 104 gboolean successful; | |
| 105 }; | |
| 106 | |
| 107 static Lisp_Object | |
| 108 gtk_selection_request_lisp_error (Lisp_Object closure) | |
| 109 { | |
| 110 struct _selection_closure *cl = (struct _selection_closure *) | |
| 111 get_opaque_ptr (closure); | |
| 112 | |
| 113 free_opaque_ptr (closure); | |
| 114 if (cl->successful == TRUE) | |
| 115 return Qnil; | |
| 116 gtk_decline_selection_request (cl->data); | |
| 117 return Qnil; | |
| 118 } | |
| 119 | |
| 120 /* This provides the current selection to a requester. | |
| 121 ** | |
| 122 ** This is connected to the selection_get() signal of the application | |
| 123 ** shell in device-gtk.c:gtk_init_device(). | |
| 124 ** | |
| 125 ** This is radically different than the old selection code (21.1.x), | |
| 126 ** but has been modeled after the X code, and appears to work. | |
| 127 ** | |
| 128 ** WMP Feb 12 2001 | |
| 129 */ | |
| 130 void | |
| 2286 | 131 emacs_gtk_selection_handle (GtkWidget *UNUSED (widget), |
| 462 | 132 GtkSelectionData *selection_data, |
| 2286 | 133 guint UNUSED (info), |
| 462 | 134 guint time_stamp, |
| 2286 | 135 gpointer UNUSED (data)) |
| 462 | 136 { |
| 137 /* This function can GC */ | |
| 138 struct gcpro gcpro1, gcpro2; | |
| 139 Lisp_Object temp_obj; | |
| 140 Lisp_Object selection_symbol; | |
| 141 Lisp_Object target_symbol = Qnil; | |
| 142 Lisp_Object converted_selection = Qnil; | |
| 143 guint32 local_selection_time; | |
| 144 Lisp_Object successful_p = Qnil; | |
| 145 int count; | |
| 146 struct device *d = decode_gtk_device (Qnil); | |
| 147 struct _selection_closure *cl = NULL; | |
| 148 | |
| 149 GCPRO2 (converted_selection, target_symbol); | |
| 150 | |
| 151 selection_symbol = atom_to_symbol (d, selection_data->selection); | |
| 152 target_symbol = atom_to_symbol (d, selection_data->target); | |
| 153 | |
| 154 #if 0 /* #### MULTIPLE doesn't work yet */ | |
| 155 if (EQ (target_symbol, QMULTIPLE)) | |
| 156 target_symbol = fetch_multiple_target (selection_data); | |
| 157 #endif | |
| 158 | |
| 2620 | 159 temp_obj = get_selection_raw_time(selection_symbol); |
| 462 | 160 |
| 161 if (NILP (temp_obj)) | |
| 162 { | |
| 163 /* We don't appear to have the selection. */ | |
| 164 gtk_decline_selection_request (selection_data); | |
| 165 | |
| 166 goto DONE_LABEL; | |
| 167 } | |
| 168 | |
| 169 local_selection_time = * (guint32 *) XOPAQUE_DATA (temp_obj); | |
| 170 | |
| 171 if (time_stamp != GDK_CURRENT_TIME && | |
| 172 local_selection_time > time_stamp) | |
| 173 { | |
| 174 /* Someone asked for the selection, and we have one, but not the one | |
| 175 they're looking for. */ | |
| 176 gtk_decline_selection_request (selection_data); | |
| 177 goto DONE_LABEL; | |
| 178 } | |
| 179 | |
| 180 converted_selection = select_convert_out (selection_symbol, | |
| 181 target_symbol, Qnil); | |
| 182 | |
| 183 /* #### Is this the right thing to do? I'm no X expert. -- ajh */ | |
| 184 if (NILP (converted_selection)) | |
| 185 { | |
| 186 /* We don't appear to have a selection in that data type. */ | |
| 187 gtk_decline_selection_request (selection_data); | |
| 188 goto DONE_LABEL; | |
| 189 } | |
| 190 | |
| 191 count = specpdl_depth (); | |
| 192 | |
| 2367 | 193 cl = xnew (struct _selection_closure); |
| 462 | 194 cl->data = selection_data; |
| 195 cl->successful = FALSE; | |
| 196 | |
| 197 record_unwind_protect (gtk_selection_request_lisp_error, | |
| 198 make_opaque_ptr (cl)); | |
| 199 | |
| 200 { | |
| 2367 | 201 Rawbyte *data; |
| 665 | 202 Bytecount size; |
| 462 | 203 int format; |
| 204 GdkAtom type; | |
| 205 lisp_data_to_selection_data (d, converted_selection, | |
| 206 &data, &type, &size, &format); | |
| 207 | |
| 647 | 208 gtk_selection_data_set (selection_data, type, format, data, |
| 209 /* #### is this right? */ | |
| 210 (unsigned int) size); | |
| 462 | 211 successful_p = Qt; |
| 212 /* Tell x_selection_request_lisp_error() it's cool. */ | |
| 213 cl->successful = TRUE; | |
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214 xfree (data); |
| 462 | 215 } |
| 216 | |
| 771 | 217 unbind_to (count); |
| 462 | 218 |
| 219 DONE_LABEL: | |
| 220 | |
| 1726 | 221 if (cl) |
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222 xfree (cl); |
| 462 | 223 |
| 224 UNGCPRO; | |
| 225 | |
| 226 /* Let random lisp code notice that the selection has been asked for. */ | |
| 227 { | |
| 228 Lisp_Object val = Vgtk_sent_selection_hooks; | |
| 229 if (!UNBOUNDP (val) && !NILP (val)) | |
| 230 { | |
| 231 Lisp_Object rest; | |
| 232 if (CONSP (val) && !EQ (XCAR (val), Qlambda)) | |
| 233 for (rest = val; !NILP (rest); rest = Fcdr (rest)) | |
| 234 call3 (Fcar (rest), selection_symbol, target_symbol, successful_p); | |
| 235 else | |
| 236 call3 (val, selection_symbol, target_symbol, successful_p); | |
| 237 } | |
| 238 } | |
| 239 } | |
| 240 | |
| 241 | |
| 746 | 242 void |
| 2286 | 243 emacs_gtk_selection_clear_event_handle (GtkWidget *UNUSED (widget), |
| 746 | 244 GdkEventSelection *event, |
| 2286 | 245 gpointer UNUSED (data)) |
| 746 | 246 { |
| 247 GdkAtom selection = event->selection; | |
| 248 guint32 changed_owner_time = event->time; | |
| 249 struct device *d = decode_gtk_device (Qnil); | |
| 250 | |
| 251 Lisp_Object selection_symbol, local_selection_time_lisp; | |
| 252 guint32 local_selection_time; | |
| 253 | |
| 254 selection_symbol = atom_to_symbol (d, selection); | |
| 255 | |
| 2620 | 256 local_selection_time_lisp = get_selection_raw_time (selection_symbol); |
| 746 | 257 |
| 258 /* We don't own the selection, so that's fine. */ | |
| 259 if (NILP (local_selection_time_lisp)) | |
| 260 return; | |
| 261 | |
| 262 local_selection_time = *(guint32 *) XOPAQUE_DATA (local_selection_time_lisp); | |
| 263 | |
| 264 /* This SelectionClear is for a selection that we no longer own, so we can | |
| 265 disregard it. (That is, we have reasserted the selection since this | |
| 266 request was generated.) | |
| 267 */ | |
| 268 if (changed_owner_time != GDK_CURRENT_TIME && | |
| 269 local_selection_time > changed_owner_time) | |
| 270 return; | |
| 271 | |
| 272 handle_selection_clear (selection_symbol); | |
| 273 } | |
| 274 | |
| 275 | |
| 462 | 276 |
| 277 static GtkWidget *reading_selection_reply; | |
| 278 static GdkAtom reading_which_selection; | |
| 279 static int selection_reply_timed_out; | |
| 280 | |
| 281 /* Gets the current selection owned by another application */ | |
| 282 void | |
| 2286 | 283 emacs_gtk_selection_received (GtkWidget *UNUSED (widget), |
| 462 | 284 GtkSelectionData *selection_data, |
| 2286 | 285 gpointer UNUSED (user_data)) |
| 462 | 286 { |
| 287 waiting_for_selection = FALSE; | |
| 288 Vretrieved_selection = Qnil; | |
| 289 | |
| 290 reading_selection_reply = NULL; | |
| 291 | |
| 292 signal_fake_event (); | |
| 293 | |
| 294 if (selection_data->length < 0) | |
| 295 { | |
| 296 return; | |
| 297 } | |
| 298 | |
| 299 Vretrieved_selection = | |
| 300 selection_data_to_lisp_data (NULL, | |
| 301 selection_data->data, | |
| 302 selection_data->length, | |
| 303 selection_data->type, | |
| 304 selection_data->format); | |
| 305 } | |
| 306 | |
| 307 static int | |
| 2286 | 308 selection_reply_done (void *UNUSED (ignore)) |
| 462 | 309 { |
| 310 return !reading_selection_reply; | |
| 311 } | |
| 312 | |
| 313 /* Do protocol to read selection-data from the server. | |
| 314 Converts this to lisp data and returns it. | |
| 315 */ | |
| 316 static Lisp_Object | |
| 317 gtk_get_foreign_selection (Lisp_Object selection_symbol, | |
| 318 Lisp_Object target_type) | |
| 319 { | |
| 320 /* This function can GC */ | |
| 321 struct device *d = decode_gtk_device (Qnil); | |
| 322 GtkWidget *requestor = DEVICE_GTK_APP_SHELL (d); | |
| 323 guint32 requestor_time = DEVICE_GTK_MOUSE_TIMESTAMP (d); | |
| 324 GdkAtom selection_atom = symbol_to_gtk_atom (d, selection_symbol, 0); | |
| 325 int speccount; | |
| 326 GdkAtom type_atom = symbol_to_gtk_atom (d, (CONSP (target_type) ? | |
| 327 XCAR (target_type) : target_type), 0); | |
| 328 | |
| 329 gtk_selection_convert (requestor, selection_atom, type_atom, | |
| 330 requestor_time); | |
| 331 | |
| 332 signal_fake_event (); | |
| 333 | |
| 334 /* Block until the reply has been read. */ | |
| 335 reading_selection_reply = requestor; | |
| 336 reading_which_selection = selection_atom; | |
| 337 selection_reply_timed_out = 0; | |
| 338 | |
| 339 speccount = specpdl_depth (); | |
| 340 | |
| 341 #if 0 | |
| 342 /* add a timeout handler */ | |
| 343 if (gtk_selection_timeout > 0) | |
| 344 { | |
|
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345 Lisp_Object id = Fadd_timeout (make_fixnum (x_selection_timeout), |
| 462 | 346 Qx_selection_reply_timeout_internal, |
| 347 Qnil, Qnil); | |
| 348 record_unwind_protect (Fdisable_timeout, id); | |
| 349 } | |
| 350 #endif | |
| 351 | |
| 352 /* This is ^Gable */ | |
| 353 wait_delaying_user_input (selection_reply_done, 0); | |
| 354 | |
| 355 if (selection_reply_timed_out) | |
| 563 | 356 signal_error (Qselection_conversion_error, "timed out waiting for reply from selection owner", Qunbound); |
| 462 | 357 |
| 771 | 358 unbind_to (speccount); |
| 462 | 359 |
| 360 /* otherwise, the selection is waiting for us on the requested property. */ | |
| 361 return select_convert_in (selection_symbol, | |
| 362 target_type, | |
| 363 Vretrieved_selection); | |
| 364 } | |
| 365 | |
| 366 | |
| 367 #if 0 | |
| 368 static void | |
| 369 gtk_get_window_property (struct device *d, GtkWidget *window, GdkAtom property, | |
| 370 Extbyte **data_ret, int *bytes_ret, | |
| 371 GdkAtom *actual_type_ret, int *actual_format_ret, | |
| 372 unsigned long *actual_size_ret, int delete_p) | |
| 373 { | |
| 647 | 374 /* deleted */ |
| 462 | 375 } |
| 376 | |
| 377 | |
| 378 static void | |
| 379 receive_incremental_selection (Display *display, Window window, Atom property, | |
| 380 /* this one is for error messages only */ | |
| 381 Lisp_Object target_type, | |
| 382 unsigned int min_size_bytes, | |
| 383 Extbyte **data_ret, int *size_bytes_ret, | |
| 384 Atom *type_ret, int *format_ret, | |
| 385 unsigned long *size_ret) | |
| 386 { | |
| 647 | 387 /* deleted */ |
| 462 | 388 } |
| 389 | |
| 390 | |
| 391 static Lisp_Object | |
| 392 gtk_get_window_property_as_lisp_data (struct device *d, | |
| 393 GtkWidget *window, | |
| 394 GdkAtom property, | |
| 395 /* next two for error messages only */ | |
| 396 Lisp_Object target_type, | |
| 397 GdkAtom selection_atom) | |
| 398 { | |
| 647 | 399 /* deleted */ |
| 462 | 400 } |
| 401 #endif | |
| 402 | |
| 403 | |
| 404 | |
| 405 static Lisp_Object | |
| 2286 | 406 gtk_own_selection (Lisp_Object selection_name, |
| 407 Lisp_Object UNUSED (selection_value), | |
| 408 Lisp_Object UNUSED (how_to_add), | |
| 409 Lisp_Object UNUSED (selection_type), int UNUSED (owned_p)) | |
| 462 | 410 { |
| 411 struct device *d = decode_gtk_device (Qnil); | |
| 412 GtkWidget *selecting_window = GTK_WIDGET (DEVICE_GTK_APP_SHELL (d)); | |
| 413 /* Use the time of the last-read mouse or keyboard event. | |
| 414 For selection purposes, we use this as a sleazy way of knowing what the | |
| 415 current time is in server-time. This assumes that the most recently read | |
| 416 mouse or keyboard event has something to do with the assertion of the | |
| 417 selection, which is probably true. | |
| 418 */ | |
| 419 guint32 thyme = DEVICE_GTK_MOUSE_TIMESTAMP (d); | |
| 420 GdkAtom selection_atom; | |
| 421 | |
| 422 CHECK_SYMBOL (selection_name); | |
| 423 selection_atom = symbol_to_gtk_atom (d, selection_name, 0); | |
| 424 | |
| 425 gtk_selection_owner_set (selecting_window, | |
| 426 selection_atom, | |
| 427 thyme); | |
| 428 | |
| 2620 | 429 /* [[ We do NOT use time_to_lisp() here any more, like we used to. |
| 462 | 430 That assumed equivalence of time_t and Time, which is not |
| 431 necessarily the case (e.g. under OSF on the Alphas, where | |
| 432 Time is a 64-bit quantity and time_t is a 32-bit quantity). | |
| 433 | |
| 2620 | 434 Opaque pointers are the clean way to go here. ]] |
| 435 | |
| 436 See my comment on the same issue in select-x.c -- Aidan. */ | |
| 793 | 437 return make_opaque (&thyme, sizeof (thyme)); |
| 462 | 438 } |
| 439 | |
| 440 static void | |
| 441 gtk_disown_selection (Lisp_Object selection, Lisp_Object timeval) | |
| 442 { | |
| 443 struct device *d = decode_gtk_device (Qnil); | |
| 444 GdkAtom selection_atom; | |
| 445 guint32 timestamp; | |
| 446 | |
| 447 CHECK_SYMBOL (selection); | |
| 448 selection_atom = symbol_to_gtk_atom (d, selection, 0); | |
| 449 | |
| 450 if (NILP (timeval)) | |
| 451 timestamp = DEVICE_GTK_MOUSE_TIMESTAMP (d); | |
| 452 else | |
| 453 { | |
| 454 time_t the_time; | |
| 455 lisp_to_time (timeval, &the_time); | |
| 456 timestamp = (guint32) the_time; | |
| 457 } | |
| 458 | |
| 459 gtk_selection_owner_set (NULL, selection_atom, timestamp); | |
| 460 } | |
| 461 | |
| 462 static Lisp_Object | |
| 463 gtk_selection_exists_p (Lisp_Object selection, | |
| 2286 | 464 Lisp_Object UNUSED (selection_type)) |
| 462 | 465 { |
| 466 struct device *d = decode_gtk_device (Qnil); | |
| 467 | |
| 468 return (gdk_selection_owner_get (symbol_to_gtk_atom (d, selection, 0)) ? Qt : Qnil); | |
| 469 } | |
| 470 | |
| 471 | |
| 472 | |
| 473 /************************************************************************/ | |
| 474 /* initialization */ | |
| 475 /************************************************************************/ | |
| 476 | |
| 477 void | |
| 478 syms_of_select_gtk (void) | |
| 479 { | |
| 480 } | |
| 481 | |
| 482 void | |
| 483 console_type_create_select_gtk (void) | |
| 484 { | |
| 485 CONSOLE_HAS_METHOD (gtk, own_selection); | |
| 486 CONSOLE_HAS_METHOD (gtk, disown_selection); | |
| 487 CONSOLE_HAS_METHOD (gtk, selection_exists_p); | |
| 488 CONSOLE_HAS_METHOD (gtk, get_foreign_selection); | |
| 489 } | |
| 490 | |
| 491 void | |
| 492 vars_of_select_gtk (void) | |
| 493 { | |
| 494 staticpro (&Vretrieved_selection); | |
| 495 Vretrieved_selection = Qnil; | |
| 496 | |
| 497 DEFVAR_LISP ("gtk-sent-selection-hooks", &Vgtk_sent_selection_hooks /* | |
| 498 A function or functions to be called after we have responded to some | |
| 499 other client's request for the value of a selection that we own. The | |
| 500 function(s) will be called with four arguments: | |
| 501 - the name of the selection (typically PRIMARY, SECONDARY, or CLIPBOARD); | |
| 502 - the name of the selection-type which we were requested to convert the | |
| 503 selection into before sending (for example, STRING or LENGTH); | |
| 504 - and whether we successfully transmitted the selection. | |
| 505 We might have failed (and declined the request) for any number of reasons, | |
| 506 including being asked for a selection that we no longer own, or being asked | |
| 507 to convert into a type that we don't know about or that is inappropriate. | |
| 508 This hook doesn't let you change the behavior of emacs's selection replies, | |
| 509 it merely informs you that they have happened. | |
| 510 */ ); | |
| 511 Vgtk_sent_selection_hooks = Qunbound; | |
| 512 } |