| 1 | /* X Selection processing for emacs |
| 2 | Copyright (C) 1990, 1992 Free Software Foundation. |
| 3 | |
| 4 | This file is part of GNU Emacs. |
| 5 | |
| 6 | GNU Emacs is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2, or (at your option) |
| 9 | any later version. |
| 10 | |
| 11 | GNU Emacs is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with GNU Emacs; see the file COPYING. If not, write to |
| 18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 19 | |
| 20 | #include "config.h" |
| 21 | #include "lisp.h" |
| 22 | #include "xterm.h" |
| 23 | #include "buffer.h" |
| 24 | #include "frame.h" |
| 25 | |
| 26 | #ifdef HAVE_X11 |
| 27 | |
| 28 | /* Macros for X Selections */ |
| 29 | #define MAX_SELECTION(dpy) (((dpy)->max_request_size << 2) - 100) |
| 30 | #define SELECTION_LENGTH(len,format) ((len) * ((format) >> 2)) |
| 31 | |
| 32 | /* The timestamp of the last input event we received from the X server. */ |
| 33 | unsigned long last_event_timestamp; |
| 34 | |
| 35 | /* t if a mouse button is depressed. */ |
| 36 | extern Lisp_Object Vmouse_grabbed; |
| 37 | |
| 38 | /* When emacs became the PRIMARY selection owner. */ |
| 39 | Time x_begin_selection_own; |
| 40 | |
| 41 | /* When emacs became the SECONDARY selection owner. */ |
| 42 | Time x_begin_secondary_selection_own; |
| 43 | |
| 44 | /* When emacs became the CLIPBOARD selection owner. */ |
| 45 | Time x_begin_clipboard_own; |
| 46 | |
| 47 | /* The value of the current CLIPBOARD selection. */ |
| 48 | Lisp_Object Vx_clipboard_value; |
| 49 | |
| 50 | /* The value of the current PRIMARY selection. */ |
| 51 | Lisp_Object Vx_selection_value; |
| 52 | |
| 53 | /* The value of the current SECONDARY selection. */ |
| 54 | Lisp_Object Vx_secondary_selection_value; |
| 55 | |
| 56 | /* Types of selections we may make. Note that Qcut_buffer0 isn't really |
| 57 | a selection, but it acts like one for the sake of Fx_own_selection and |
| 58 | Fx_selection_value. */ |
| 59 | Lisp_Object Qprimary, Qsecondary, Qclipboard, Qcut_buffer0; |
| 60 | |
| 61 | /* Emacs' selection property identifiers. */ |
| 62 | Atom Xatom_emacs_selection; |
| 63 | Atom Xatom_emacs_secondary_selection; |
| 64 | |
| 65 | /* Clipboard selection atom. */ |
| 66 | Atom Xatom_clipboard_selection; |
| 67 | |
| 68 | /* Clipboard atom. */ |
| 69 | Atom Xatom_clipboard; |
| 70 | |
| 71 | /* Atom for indicating incremental selection transfer. */ |
| 72 | Atom Xatom_incremental; |
| 73 | |
| 74 | /* Atom for indicating multiple selection request list */ |
| 75 | Atom Xatom_multiple; |
| 76 | |
| 77 | /* Atom for what targets emacs handles. */ |
| 78 | Atom Xatom_targets; |
| 79 | |
| 80 | /* Atom for indicating timstamp selection request */ |
| 81 | Atom Xatom_timestamp; |
| 82 | |
| 83 | /* Atom requesting we delete our selection. */ |
| 84 | Atom Xatom_delete; |
| 85 | |
| 86 | /* Selection magic. */ |
| 87 | Atom Xatom_insert_selection; |
| 88 | |
| 89 | /* Type of property for INSERT_SELECTION. */ |
| 90 | Atom Xatom_pair; |
| 91 | |
| 92 | /* More selection magic. */ |
| 93 | Atom Xatom_insert_property; |
| 94 | |
| 95 | /* Atom for indicating property type TEXT */ |
| 96 | Atom Xatom_text; |
| 97 | |
| 98 | /* Kinds of protocol things we may receive. */ |
| 99 | Atom Xatom_wm_take_focus; |
| 100 | Atom Xatom_wm_save_yourself; |
| 101 | Atom Xatom_wm_delete_window; |
| 102 | |
| 103 | /* Communication with window managers. */ |
| 104 | Atom Xatom_wm_protocols; |
| 105 | |
| 106 | /* These are to handle incremental selection transfer. */ |
| 107 | Window incr_requestor; |
| 108 | Atom incr_property; |
| 109 | int incr_nbytes; |
| 110 | unsigned char *incr_value; |
| 111 | unsigned char *incr_ptr; |
| 112 | |
| 113 | /* SELECTION OWNER CODE */ |
| 114 | |
| 115 | |
| 116 | /* Request selection ownership if we do not already have it. */ |
| 117 | |
| 118 | static int |
| 119 | own_selection (selection_type, time) |
| 120 | Atom selection_type; |
| 121 | Time time; |
| 122 | { |
| 123 | Window owner_window, selecting_window; |
| 124 | |
| 125 | if ((EQ (selection_type, Qprimary) && !NILP (Vx_selection_value)) |
| 126 | || ((EQ (selection_type, Qsecondary)) && !NILP (Vx_secondary_selection_value)) |
| 127 | || ((EQ (selection_type, Qclipboard)) && !NILP (Vx_clipboard_value))) |
| 128 | return 1; |
| 129 | |
| 130 | selecting_window = selected_frame->display.x->window_desc; |
| 131 | XSetSelectionOwner (x_current_display, selection_type, |
| 132 | selecting_window, time); |
| 133 | owner_window = XGetSelectionOwner (x_current_display, selection_type); |
| 134 | |
| 135 | if (owner_window != selecting_window) |
| 136 | return 0; |
| 137 | |
| 138 | return 1; |
| 139 | } |
| 140 | |
| 141 | /* Become the selection owner and make our data the selection value. |
| 142 | If we are already the owner, merely change data and timestamp values. |
| 143 | This avoids generating SelectionClear events for ourselves. */ |
| 144 | |
| 145 | DEFUN ("x-own-selection", Fx_own_selection, Sx_own_selection, |
| 146 | 1, 2, "", |
| 147 | "Make STRING the selection value. Default is the primary selection,\n\ |
| 148 | but optional second argument TYPE may specify secondary or clipboard.\n\ |
| 149 | \n\ |
| 150 | TYPE may also be cut-buffer0, indicating that Emacs should set the X\n\ |
| 151 | cut buffer 0 to STRING. This is for compatibility with older X\n\ |
| 152 | applications which still use the cut buffers; new applications should\n\ |
| 153 | use X selections.") |
| 154 | (string, type) |
| 155 | register Lisp_Object string, type; |
| 156 | { |
| 157 | Atom selection_type; |
| 158 | Lisp_Object val; |
| 159 | Time event_time = last_event_timestamp; |
| 160 | CHECK_STRING (string, 0); |
| 161 | |
| 162 | if (NILP (type) || EQ (type, Qprimary)) |
| 163 | { |
| 164 | BLOCK_INPUT; |
| 165 | if (own_selection (XA_PRIMARY, event_time)) |
| 166 | { |
| 167 | x_begin_selection_own = event_time; |
| 168 | val = Vx_selection_value = string; |
| 169 | } |
| 170 | UNBLOCK_INPUT; |
| 171 | } |
| 172 | else if (EQ (type, Qsecondary)) |
| 173 | { |
| 174 | BLOCK_INPUT; |
| 175 | if (own_selection (XA_SECONDARY, event_time)) |
| 176 | { |
| 177 | x_begin_secondary_selection_own = event_time; |
| 178 | val = Vx_secondary_selection_value = string; |
| 179 | } |
| 180 | UNBLOCK_INPUT; |
| 181 | } |
| 182 | else if (EQ (type, Qclipboard)) |
| 183 | { |
| 184 | BLOCK_INPUT; |
| 185 | if (own_selection (Xatom_clipboard, event_time)) |
| 186 | { |
| 187 | x_begin_clipboard_own = event_time; |
| 188 | val = Vx_clipboard_value = string; |
| 189 | } |
| 190 | UNBLOCK_INPUT; |
| 191 | } |
| 192 | else if (EQ (type, Qcut_buffer0)) |
| 193 | { |
| 194 | BLOCK_INPUT; |
| 195 | XStoreBytes (x_current_display, |
| 196 | (char *) XSTRING (string)->data, |
| 197 | XSTRING (string)->size); |
| 198 | UNBLOCK_INPUT; |
| 199 | } |
| 200 | else |
| 201 | error ("Invalid X selection type"); |
| 202 | |
| 203 | return val; |
| 204 | } |
| 205 | |
| 206 | /* Clear our selection ownership data, as some other client has |
| 207 | become the owner. */ |
| 208 | |
| 209 | void |
| 210 | x_disown_selection (old_owner, selection, changed_owner_time) |
| 211 | Window *old_owner; |
| 212 | Atom selection; |
| 213 | Time changed_owner_time; |
| 214 | { |
| 215 | struct frame *s = x_window_to_frame (old_owner); |
| 216 | |
| 217 | if (s) /* We are the owner */ |
| 218 | { |
| 219 | if (selection == XA_PRIMARY) |
| 220 | { |
| 221 | x_begin_selection_own = 0; |
| 222 | Vx_selection_value = Qnil; |
| 223 | } |
| 224 | else if (selection == XA_SECONDARY) |
| 225 | { |
| 226 | x_begin_secondary_selection_own = 0; |
| 227 | Vx_secondary_selection_value = Qnil; |
| 228 | } |
| 229 | else if (selection == Xatom_clipboard) |
| 230 | { |
| 231 | x_begin_clipboard_own = 0; |
| 232 | Vx_clipboard_value = Qnil; |
| 233 | } |
| 234 | else |
| 235 | abort (); |
| 236 | } |
| 237 | else |
| 238 | abort (); /* Inconsistent state. */ |
| 239 | } |
| 240 | |
| 241 | int x_selection_alloc_error; |
| 242 | int x_converting_selection; |
| 243 | |
| 244 | /* Reply to some client's request for our selection data. Data is |
| 245 | placed in a property supplied by the requesting window. |
| 246 | |
| 247 | If the data exceeds the maximum amount the server can send, |
| 248 | then prepare to send it incrementally, and reply to the client with |
| 249 | the total size of the data. |
| 250 | |
| 251 | But first, check for all the other crufty stuff we could get. */ |
| 252 | |
| 253 | void |
| 254 | x_answer_selection_request (event) |
| 255 | XSelectionRequestEvent event; |
| 256 | { |
| 257 | Time emacs_own_time; |
| 258 | Lisp_Object selection_value; |
| 259 | XSelectionEvent evt; |
| 260 | int format = 8; /* We have only byte sized (text) data. */ |
| 261 | |
| 262 | evt.type = SelectionNotify; /* Construct reply event */ |
| 263 | evt.display = event.display; |
| 264 | evt.requestor = event.requestor; |
| 265 | evt.selection = event.selection; |
| 266 | evt.time = event.time; |
| 267 | evt.target = event.target; |
| 268 | |
| 269 | if (event.selection == XA_PRIMARY) |
| 270 | { |
| 271 | emacs_own_time = x_begin_selection_own; |
| 272 | selection_value = Vx_selection_value; |
| 273 | } |
| 274 | else if (event.selection == XA_SECONDARY) |
| 275 | { |
| 276 | emacs_own_time = x_begin_secondary_selection_own; |
| 277 | selection_value = Vx_secondary_selection_value; |
| 278 | } |
| 279 | else if (event.selection == Xatom_clipboard) |
| 280 | { |
| 281 | emacs_own_time = x_begin_clipboard_own; |
| 282 | selection_value = Vx_clipboard_value; |
| 283 | } |
| 284 | else |
| 285 | abort (); |
| 286 | |
| 287 | if (event.time != CurrentTime |
| 288 | && event.time < emacs_own_time) |
| 289 | evt.property = None; |
| 290 | else |
| 291 | { |
| 292 | if (event.property == None) /* obsolete client */ |
| 293 | evt.property = event.target; |
| 294 | else |
| 295 | evt.property = event.property; |
| 296 | } |
| 297 | |
| 298 | if (event.target == Xatom_targets) /* Send List of target atoms */ |
| 299 | { |
| 300 | } |
| 301 | else if (event.target == Xatom_multiple) /* Recvd list: <target, prop> */ |
| 302 | { |
| 303 | Atom type; |
| 304 | int return_format; |
| 305 | unsigned long items, bytes_left; |
| 306 | unsigned char *data; |
| 307 | int result, i; |
| 308 | |
| 309 | if (event.property == 0 /* 0 == NILP */ |
| 310 | || event.property == None) |
| 311 | return; |
| 312 | |
| 313 | result = XGetWindowProperty (event.display, event.requestor, |
| 314 | event.property, 0L, 10000000L, |
| 315 | True, Xatom_pair, &type, &return_format, |
| 316 | &items, &bytes_left, &data); |
| 317 | |
| 318 | if (result == Success && type == Xatom_pair) |
| 319 | for (i = items; i > 0; i--) |
| 320 | { |
| 321 | /* Convert each element of the list. */ |
| 322 | } |
| 323 | |
| 324 | (void) XSendEvent (x_current_display, evt.requestor, False, |
| 325 | 0L, (XEvent *) &evt); |
| 326 | return; |
| 327 | } |
| 328 | else if (event.target == Xatom_timestamp) /* Send ownership timestamp */ |
| 329 | { |
| 330 | if (! emacs_own_time) |
| 331 | abort (); |
| 332 | |
| 333 | format = 32; |
| 334 | XChangeProperty (evt.display, evt.requestor, evt.property, |
| 335 | evt.target, format, PropModeReplace, |
| 336 | (unsigned char *) &emacs_own_time, 1); |
| 337 | return; |
| 338 | } |
| 339 | else if (event.target == Xatom_delete) /* Delete our selection. */ |
| 340 | { |
| 341 | if (EQ (Qnil, selection_value)) |
| 342 | abort (); |
| 343 | |
| 344 | x_disown_selection (event.owner, event.selection, event.time); |
| 345 | |
| 346 | /* Now return property of type NILP, length 0. */ |
| 347 | XChangeProperty (event.display, event.requestor, event.property, |
| 348 | 0, format, PropModeReplace, (unsigned char *) 0, 0); |
| 349 | return; |
| 350 | } |
| 351 | else if (event.target == Xatom_insert_selection) |
| 352 | { |
| 353 | Atom type; |
| 354 | int return_format; |
| 355 | unsigned long items, bytes_left; |
| 356 | unsigned char *data; |
| 357 | int result = XGetWindowProperty (event.display, event.requestor, |
| 358 | event.property, 0L, 10000000L, |
| 359 | True, Xatom_pair, &type, &return_format, |
| 360 | &items, &bytes_left, &data); |
| 361 | if (result == Success && type == Xatom_pair) |
| 362 | { |
| 363 | /* Convert the first atom to (a selection) to the target |
| 364 | indicated by the second atom. */ |
| 365 | } |
| 366 | } |
| 367 | else if (event.target == Xatom_insert_property) |
| 368 | { |
| 369 | Atom type; |
| 370 | int return_format; |
| 371 | unsigned long items, bytes_left; |
| 372 | unsigned char *data; |
| 373 | int result = XGetWindowProperty (event.display, event.requestor, |
| 374 | event.property, 0L, 10000000L, |
| 375 | True, XA_STRING, &type, &return_format, |
| 376 | &items, &bytes_left, &data); |
| 377 | |
| 378 | if (result == Success && type == XA_STRING && return_format == 8) |
| 379 | { |
| 380 | if (event.selection == Xatom_emacs_selection) |
| 381 | Vx_selection_value = make_string (data); |
| 382 | else if (event.selection == Xatom_emacs_secondary_selection) |
| 383 | Vx_secondary_selection_value = make_string (data); |
| 384 | else if (event.selection == Xatom_clipboard_selection) |
| 385 | Vx_clipboard_value = make_string (data); |
| 386 | else |
| 387 | abort (); |
| 388 | } |
| 389 | |
| 390 | return; |
| 391 | } |
| 392 | else if ((event.target == Xatom_text |
| 393 | || event.target == XA_STRING)) |
| 394 | { |
| 395 | int size = XSTRING (selection_value)->size; |
| 396 | unsigned char *data = XSTRING (selection_value)->data; |
| 397 | |
| 398 | if (EQ (Qnil, selection_value)) |
| 399 | abort (); |
| 400 | |
| 401 | /* Place data on requestor window's property. */ |
| 402 | if (SELECTION_LENGTH (size, format) |
| 403 | <= MAX_SELECTION (x_current_display)) |
| 404 | { |
| 405 | x_converting_selection = 1; |
| 406 | XChangeProperty (evt.display, evt.requestor, evt.property, |
| 407 | evt.target, format, PropModeReplace, |
| 408 | data, size); |
| 409 | if (x_selection_alloc_error) |
| 410 | { |
| 411 | x_selection_alloc_error = 0; |
| 412 | abort (); |
| 413 | } |
| 414 | x_converting_selection = 0; |
| 415 | } |
| 416 | else /* Send incrementally */ |
| 417 | { |
| 418 | evt.target = Xatom_incremental; |
| 419 | incr_requestor = evt.requestor; |
| 420 | incr_property = evt.property; |
| 421 | x_converting_selection = 1; |
| 422 | |
| 423 | /* Need to handle Alloc errors on these requests. */ |
| 424 | XChangeProperty (evt.display, incr_requestor, incr_property, |
| 425 | Xatom_incremental, 32, |
| 426 | PropModeReplace, |
| 427 | (unsigned char *) &size, 1); |
| 428 | if (x_selection_alloc_error) |
| 429 | { |
| 430 | x_selection_alloc_error = 0; |
| 431 | x_converting_selection = 0; |
| 432 | abort (); |
| 433 | /* Now abort the send. */ |
| 434 | } |
| 435 | |
| 436 | incr_nbytes = size; |
| 437 | incr_value = data; |
| 438 | incr_ptr = data; |
| 439 | |
| 440 | /* Ask for notification when requestor deletes property. */ |
| 441 | XSelectInput (x_current_display, incr_requestor, PropertyChangeMask); |
| 442 | |
| 443 | /* If we're sending incrementally, perhaps block here |
| 444 | until all sent? */ |
| 445 | } |
| 446 | } |
| 447 | else |
| 448 | evt.property = None; |
| 449 | |
| 450 | /* Don't do this if there was an Alloc error: abort the transfer |
| 451 | by sending None. */ |
| 452 | (void) XSendEvent (x_current_display, evt.requestor, False, |
| 453 | 0L, (XEvent *) &evt); |
| 454 | } |
| 455 | |
| 456 | /* Send an increment of selection data in response to a PropertyNotify event. |
| 457 | The increment is placed in a property on the requestor's window. |
| 458 | When the requestor has processed the increment, it deletes the property, |
| 459 | which sends us another PropertyNotify event. |
| 460 | |
| 461 | When there is no more data to send, we send a zero-length increment. */ |
| 462 | |
| 463 | void |
| 464 | x_send_incremental (event) |
| 465 | XPropertyEvent event; |
| 466 | { |
| 467 | if (incr_requestor |
| 468 | && incr_requestor == event.window |
| 469 | && incr_property == event.atom |
| 470 | && event.state == PropertyDelete) |
| 471 | { |
| 472 | int format = 8; |
| 473 | int length = MAX_SELECTION (x_current_display); |
| 474 | int bytes_left = (incr_nbytes - (incr_ptr - incr_value)); |
| 475 | |
| 476 | if (length > bytes_left) /* Also sends 0 len when finished. */ |
| 477 | length = bytes_left; |
| 478 | XChangeProperty (x_current_display, incr_requestor, |
| 479 | incr_property, XA_STRING, format, |
| 480 | PropModeAppend, incr_ptr, length); |
| 481 | if (x_selection_alloc_error) |
| 482 | { |
| 483 | x_selection_alloc_error = 0; |
| 484 | x_converting_selection = 0; |
| 485 | /* Abandon the transmission. */ |
| 486 | abort (); |
| 487 | } |
| 488 | if (length > 0) |
| 489 | incr_ptr += length; |
| 490 | else |
| 491 | { /* Everything's sent */ |
| 492 | XSelectInput (x_current_display, incr_requestor, 0L); |
| 493 | incr_requestor = (Window) 0; |
| 494 | incr_property = (Atom) 0; |
| 495 | incr_nbytes = 0; |
| 496 | incr_value = (unsigned char *) 0; |
| 497 | incr_ptr = (unsigned char *) 0; |
| 498 | x_converting_selection = 0; |
| 499 | } |
| 500 | } |
| 501 | } |
| 502 | |
| 503 | /* SELECTION REQUESTOR CODE */ |
| 504 | |
| 505 | /* Predicate function used to match a requested event. */ |
| 506 | |
| 507 | Bool |
| 508 | XCheckSelectionEvent (dpy, event, window) |
| 509 | Display *dpy; |
| 510 | XEvent *event; |
| 511 | char *window; |
| 512 | { |
| 513 | if (event->type == SelectionNotify) |
| 514 | if (event->xselection.requestor == (Window) window) |
| 515 | return True; |
| 516 | |
| 517 | return False; |
| 518 | } |
| 519 | |
| 520 | /* Request a selection value from its owner. This will block until |
| 521 | all the data is arrived. */ |
| 522 | |
| 523 | static Lisp_Object |
| 524 | get_selection_value (type) |
| 525 | Atom type; |
| 526 | { |
| 527 | XEvent event; |
| 528 | Lisp_Object val; |
| 529 | Time requestor_time; /* Timestamp of selection request. */ |
| 530 | Window requestor_window; |
| 531 | |
| 532 | BLOCK_INPUT; |
| 533 | requestor_time = last_event_timestamp; |
| 534 | requestor_window = selected_frame->display.x->window_desc; |
| 535 | XConvertSelection (x_current_display, type, XA_STRING, |
| 536 | Xatom_emacs_selection, requestor_window, requestor_time); |
| 537 | XIfEvent (x_current_display, |
| 538 | &event, |
| 539 | XCheckSelectionEvent, |
| 540 | (char *) requestor_window); |
| 541 | val = x_selection_arrival (&event, requestor_window, requestor_time); |
| 542 | UNBLOCK_INPUT; |
| 543 | |
| 544 | return val; |
| 545 | } |
| 546 | |
| 547 | /* Request a selection value from the owner. If we are the owner, |
| 548 | simply return our selection value. If we are not the owner, this |
| 549 | will block until all of the data has arrived. */ |
| 550 | |
| 551 | DEFUN ("x-selection-value", Fx_selection_value, Sx_selection_value, |
| 552 | 0, 1, "", |
| 553 | "Return the value of one of the selections. Default is the primary\n\ |
| 554 | selection, but optional argument TYPE may specify secondary or clipboard.") |
| 555 | (type) |
| 556 | register Lisp_Object type; |
| 557 | { |
| 558 | Atom selection_type; |
| 559 | |
| 560 | if (NILP (type) || EQ (type, Qprimary)) |
| 561 | { |
| 562 | if (!NILP (Vx_selection_value)) |
| 563 | return Vx_selection_value; |
| 564 | |
| 565 | return get_selection_value (XA_PRIMARY); |
| 566 | } |
| 567 | else if (EQ (type, Qsecondary)) |
| 568 | { |
| 569 | if (!NILP (Vx_secondary_selection_value)) |
| 570 | return Vx_secondary_selection_value; |
| 571 | |
| 572 | return get_selection_value (XA_SECONDARY); |
| 573 | } |
| 574 | else if (EQ (type, Qclipboard)) |
| 575 | { |
| 576 | if (!NILP (Vx_clipboard_value)) |
| 577 | return Vx_clipboard_value; |
| 578 | |
| 579 | return get_selection_value (Xatom_clipboard); |
| 580 | } |
| 581 | else if (EQ (type, Qcut_buffer0)) |
| 582 | { |
| 583 | char *data; |
| 584 | int size; |
| 585 | Lisp_Object string; |
| 586 | |
| 587 | BLOCK_INPUT; |
| 588 | data = XFetchBytes (x_current_display, &size); |
| 589 | if (data == 0) |
| 590 | string = Qnil; |
| 591 | else |
| 592 | string = make_string (data, size); |
| 593 | UNBLOCK_INPUT; |
| 594 | |
| 595 | return string; |
| 596 | } |
| 597 | else |
| 598 | error ("Invalid X selection type"); |
| 599 | } |
| 600 | |
| 601 | Lisp_Object |
| 602 | x_selection_arrival (event, requestor_window, requestor_time) |
| 603 | register XSelectionEvent *event; |
| 604 | Window requestor_window; |
| 605 | Time requestor_time; |
| 606 | { |
| 607 | int result; |
| 608 | Atom type, selection; |
| 609 | int format; |
| 610 | unsigned long items; |
| 611 | unsigned long bytes_left; |
| 612 | unsigned char *data = 0; |
| 613 | int offset = 0; |
| 614 | |
| 615 | if (event->selection == XA_PRIMARY) |
| 616 | selection = Xatom_emacs_selection; |
| 617 | else if (event->selection == XA_SECONDARY) |
| 618 | selection = Xatom_emacs_secondary_selection; |
| 619 | else if (event->selection == Xatom_clipboard) |
| 620 | selection = Xatom_clipboard_selection; |
| 621 | else |
| 622 | abort (); |
| 623 | |
| 624 | if (event->requestor == requestor_window |
| 625 | && event->time == requestor_time |
| 626 | && event->property != None) |
| 627 | if (event->target != Xatom_incremental) |
| 628 | { |
| 629 | unsigned char *return_string = |
| 630 | (unsigned char *) alloca (MAX_SELECTION (x_current_display)); |
| 631 | |
| 632 | do |
| 633 | { |
| 634 | result = XGetWindowProperty (x_current_display, requestor_window, |
| 635 | event->property, 0L, |
| 636 | 10000000L, True, XA_STRING, |
| 637 | &type, &format, &items, |
| 638 | &bytes_left, &data); |
| 639 | if (result == Success && type == XA_STRING && format == 8 |
| 640 | && offset < MAX_SELECTION (x_current_display)) |
| 641 | { |
| 642 | bcopy (data, return_string + offset, items); |
| 643 | offset += items; |
| 644 | } |
| 645 | XFree ((char *) data); |
| 646 | } |
| 647 | while (bytes_left); |
| 648 | |
| 649 | return make_string (return_string, offset); |
| 650 | } |
| 651 | else /* Prepare incremental transfer. */ |
| 652 | { |
| 653 | unsigned char *increment_value; |
| 654 | unsigned char *increment_ptr; |
| 655 | int total_size; |
| 656 | int *increment_nbytes = 0; |
| 657 | |
| 658 | result = XGetWindowProperty (x_current_display, requestor_window, |
| 659 | selection, 0L, 10000000L, False, |
| 660 | event->property, &type, &format, |
| 661 | &items, &bytes_left, |
| 662 | (unsigned char **) &increment_nbytes); |
| 663 | if (result == Success) |
| 664 | { |
| 665 | XPropertyEvent property_event; |
| 666 | |
| 667 | total_size = *increment_nbytes; |
| 668 | increment_value = (unsigned char *) alloca (total_size); |
| 669 | increment_ptr = increment_value; |
| 670 | |
| 671 | XDeleteProperty (x_current_display, event->requestor, |
| 672 | event->property); |
| 673 | XFlush (x_current_display); |
| 674 | XFree ((char *) increment_nbytes); |
| 675 | |
| 676 | do |
| 677 | { /* NOTE: this blocks. */ |
| 678 | XWindowEvent (x_current_display, requestor_window, |
| 679 | PropertyChangeMask, |
| 680 | (XEvent *) &property_event); |
| 681 | |
| 682 | if (property_event.atom == selection |
| 683 | && property_event.state == PropertyNewValue) |
| 684 | do |
| 685 | { |
| 686 | result = XGetWindowProperty (x_current_display, |
| 687 | requestor_window, |
| 688 | selection, 0L, |
| 689 | 10000000L, True, |
| 690 | AnyPropertyType, |
| 691 | &type, &format, |
| 692 | &items, &bytes_left, |
| 693 | &data); |
| 694 | if (result == Success && type == XA_STRING |
| 695 | && format == 8) |
| 696 | { |
| 697 | bcopy (data, increment_ptr, items); |
| 698 | increment_ptr += items; |
| 699 | } |
| 700 | } |
| 701 | while (bytes_left); |
| 702 | |
| 703 | } |
| 704 | while (increment_ptr < (increment_value + total_size)); |
| 705 | |
| 706 | return make_string (increment_value, |
| 707 | (increment_ptr - increment_value)); |
| 708 | } |
| 709 | } |
| 710 | |
| 711 | return Qnil; |
| 712 | } |
| 713 | |
| 714 | void |
| 715 | syms_of_xselect () |
| 716 | { |
| 717 | DEFVAR_LISP ("x-selection-value", &Vx_selection_value, |
| 718 | "The value of emacs' last cut-string."); |
| 719 | Vx_selection_value = Qnil; |
| 720 | |
| 721 | DEFVAR_LISP ("x-secondary-selection-value", &Vx_secondary_selection_value, |
| 722 | "The value of emacs' last secondary cut-string."); |
| 723 | Vx_secondary_selection_value = Qnil; |
| 724 | |
| 725 | DEFVAR_LISP ("x-clipboard-value", &Vx_clipboard_value, |
| 726 | "The string emacs last sent to the clipboard."); |
| 727 | Vx_clipboard_value = Qnil; |
| 728 | |
| 729 | Qprimary = intern ("primary"); |
| 730 | staticpro (&Qprimary); |
| 731 | Qsecondary = intern ("secondary"); |
| 732 | staticpro (&Qsecondary); |
| 733 | Qclipboard = intern ("clipboard"); |
| 734 | staticpro (&Qclipboard); |
| 735 | Qcut_buffer0 = intern ("cut-buffer0"); |
| 736 | staticpro (&Qcut_buffer0); |
| 737 | |
| 738 | defsubr (&Sx_own_selection); |
| 739 | defsubr (&Sx_selection_value); |
| 740 | } |
| 741 | #endif /* X11 */ |