src/frontends/xforms/XWorkArea.C

   1 /* This file is part of
   2  * ======================================================
   3  *
   4  *           LyX, The Document Processor
   5  *
   6  *           Copyright 1995 Matthias Ettrich
   7  *           Copyright 1995-2001 The LyX Team.
   8  *
   9  * ====================================================== */
  10
  11 #include <config.h>
  12
  13 #ifdef __GNUG__
  14 #pragma implementation
  15 #endif
  16
  17 #include "WorkArea.h"
  18 #include "debug.h"
  19 #include "frontends/LyXView.h"
  20 #include "lyxrc.h" // lyxrc.show_banner
  21 #include "version.h" // lyx_version
  22
  23 #if FL_REVISION < 89 || (FL_REVISION == 89 && FL_FIXLEVEL < 5)
  24 #include "frontends/xforms/lyxlookup.h"
  25 #endif
  26
  27 #include "support/filetools.h" // LibFileSearch
  28 #include "support/lstrings.h"
  29 #include "support/LAssert.h"
  30
  31 #include <cmath>
  32 #include <cctype>
  33
  34 // xforms doesn't define this (but it should be in <forms.h>).
  35 extern "C"
  36 FL_APPEVENT_CB fl_set_preemptive_callback(Window, FL_APPEVENT_CB, void *);
  37
  38 using std::endl;
  39 using std::abs;
  40 using std::hex;
  41
  42 namespace {
  43
  44 inline
  45 void waitForX()
  46 {
  47         XSync(fl_get_display(), 0);
  48 }
  49
  50 // FIXME !
  51 mouse_button::state x_button_state(unsigned int button)
  52 {
  53         mouse_button::state b = mouse_button::none;
  54         switch (button) {
  55                 case Button1:
  56                         b = mouse_button::button1;
  57                         break;
  58                 case Button2:
  59                         b = mouse_button::button2;
  60                         break;
  61                 case Button3:
  62                         b = mouse_button::button3;
  63                         break;
  64                 case Button4:
  65                         b = mouse_button::button4;
  66                         break;
  67                 case Button5:
  68                         b = mouse_button::button5;
  69                         break;
  70                 default: // FIXME
  71                         break;
  72         }
  73         return b;
  74 }
  75
  76
  77 // FIXME
  78 mouse_button::state x_motion_state(unsigned int state)
  79 {
  80         mouse_button::state b = mouse_button::none;
  81         if (state & Button1MotionMask)
  82                 b |= mouse_button::button1;
  83         if (state & Button2MotionMask)
  84                 b |= mouse_button::button2;
  85         if (state & Button3MotionMask)
  86                 b |= mouse_button::button3;
  87         if (state & Button4MotionMask)
  88                 b |= mouse_button::button4;
  89         if (state & Button5MotionMask)
  90                 b |= mouse_button::button5;
  91         return b;
  92 }
  93
  94
  95 key_modifier::state x_key_state(unsigned int state)
  96 {
  97         key_modifier::state k = key_modifier::none;
  98         if (state & ControlMask)
  99                 k |= key_modifier::ctrl;
 100         if (state & ShiftMask)
 101                 k |= key_modifier::shift;
 102         if (state & Mod1Mask)
 103                 k |= key_modifier::alt;
 104         return k;
 105 }
 106
 107
 108 } // anon namespace
 109
 110
 111 extern "C" {
 112         // Just a bunch of C wrappers around static members of WorkArea
 113         static
 114         void C_WorkArea_scroll_cb(FL_OBJECT * ob, long buf)
 115         {
 116                 WorkArea::scroll_cb(ob, buf);
 117         }
 118
 119
 120         static
 121         int C_WorkArea_work_area_handler(FL_OBJECT * ob, int event,
 122                                          FL_Coord, FL_Coord,
 123                                          int key, void * xev)
 124         {
 125                 return WorkArea::work_area_handler(ob, event,
 126                                                    0, 0, key, xev);
 127         }
 128
 129         static
 130         int C_WorkAreaEventCB(FL_FORM * form, void * xev) {
 131                 WorkArea * wa = static_cast<WorkArea*>(form->u_vdata);
 132                 return wa->event_cb(static_cast<XEvent*>(xev));
 133         }
 134 }
 135
 136
 137 WorkArea::WorkArea(int xpos, int ypos, int width, int height)
 138         : splash_(0), splash_text_(0), workareapixmap(0), painter_(*this)
 139 {
 140         fl_freeze_all_forms();
 141
 142         if (lyxerr.debugging(Debug::WORKAREA))
 143                 lyxerr << "Creating work area: +"
 144                        << xpos << '+' << ypos << ' '
 145                        << width << 'x' << height << endl;
 146         //
 147         FL_OBJECT * obj;
 148         int const bw = int(abs(fl_get_border_width()));
 149
 150         // a box
 151         if (lyxerr.debugging(Debug::WORKAREA))
 152                 lyxerr << "\tbackground box: +"
 153                        << xpos << '+' << ypos << ' '
 154                        << width - 15 << 'x' << height << endl;
 155         backgroundbox = obj = fl_add_box(FL_BORDER_BOX,
 156                                          xpos, ypos,
 157                                          width - 15,
 158                                          height,"");
 159         fl_set_object_resize(obj, FL_RESIZE_ALL);
 160         fl_set_object_gravity(obj, NorthWestGravity, SouthEastGravity);
 161
 162         // Add a splash screen to the centre of the work area
 163         string const splash_file = (lyxrc.show_banner) ?
 164                 LibFileSearch("images", "banner", "xpm") : string();
 165
 166         if (!splash_file.empty()) {
 167                 int const splash_w = 425;
 168                 int const splash_h = 290;
 169                 int const splash_x = xpos + (width - 15 - splash_w) / 2;
 170                 int const splash_y = ypos + (height - splash_h) / 2;
 171                 splash_ = obj =
 172                         fl_add_pixmapbutton(FL_NORMAL_BUTTON,
 173                                             splash_x, splash_y,
 174                                             splash_w, splash_h, "");
 175                 fl_set_pixmapbutton_file(obj, splash_file.c_str());
 176                 fl_set_pixmapbutton_focus_outline(obj, 3);
 177                 fl_set_object_boxtype(obj, FL_NO_BOX);
 178
 179                 int const text_x = splash_x + 260;
 180                 int const text_y = splash_y + 255;
 181                 splash_text_ = obj =
 182                         fl_add_text(FL_NORMAL_TEXT, text_x, text_y, 160, 16,
 183                                     lyx_version);
 184                 fl_set_object_lsize(obj, FL_NORMAL_SIZE);
 185                 fl_mapcolor(FL_FREE_COL2, 0x2b, 0x47, 0x82);
 186                 fl_mapcolor(FL_FREE_COL3, 0xe1, 0xd2, 0x9b);
 187                 fl_set_object_color(obj, FL_FREE_COL2, FL_FREE_COL2);
 188                 fl_set_object_lcol(obj, FL_FREE_COL3);
 189                 fl_set_object_lalign(obj, FL_ALIGN_LEFT|FL_ALIGN_INSIDE);
 190                 fl_set_object_lstyle(obj, FL_BOLD_STYLE);
 191         }
 192
 193         //
 194         // THE SCROLLBAR
 195         //
 196
 197         scrollbar = obj = fl_add_scrollbar(FL_VERT_SCROLLBAR,
 198                                            xpos + width - 15,
 199                                            ypos, 17, height, "");
 200         fl_set_object_boxtype(obj, FL_UP_BOX);
 201         fl_set_object_resize(obj, FL_RESIZE_ALL);
 202         fl_set_object_gravity(obj, NorthEastGravity, SouthEastGravity);
 203         obj->u_vdata = this;
 204         fl_set_object_callback(obj, C_WorkArea_scroll_cb, 0);
 205         setScrollbarBounds(0.0, 0.0);
 206
 207         ///
 208         /// The free object
 209
 210         // Create the workarea pixmap
 211         createPixmap(width - 15 - 2 * bw, height - 2 * bw);
 212
 213         // We add this object as late as possible to avoit problems
 214         // with drawing.
 215         if (lyxerr.debugging(Debug::WORKAREA))
 216                 lyxerr << "\tfree object: +"
 217                        << xpos + bw << '+' << ypos + bw << ' '
 218                        << width - 15 - 2 * bw << 'x'
 219                        << height - 2 * bw << endl;
 220
 221         work_area = obj = fl_add_free(FL_ALL_FREE,
 222                                       xpos + bw, ypos + bw,
 223                                       width - 15 - 2 * bw, // scrollbarwidth
 224                                       height - 2 * bw, "",
 225                                       C_WorkArea_work_area_handler);
 226         obj->wantkey = FL_KEY_ALL;
 227         obj->u_vdata = this; /* This is how we pass the WorkArea
 228                                 to the work_area_handler. */
 229         fl_set_object_boxtype(obj,FL_DOWN_BOX);
 230         fl_set_object_resize(obj, FL_RESIZE_ALL);
 231         fl_set_object_gravity(obj, NorthWestGravity, SouthEastGravity);
 232
 233         /// X selection hook - xforms gets it wrong
 234         fl_current_form->u_vdata = this;
 235         fl_register_raw_callback(fl_current_form, FL_ALL_EVENT, C_WorkAreaEventCB);
 236
 237         fl_unfreeze_all_forms();
 238 }
 239
 240
 241 WorkArea::~WorkArea()
 242 {
 243         if (workareapixmap)
 244                 XFreePixmap(fl_get_display(), workareapixmap);
 245 }
 246
 247
 248 bool WorkArea::belowMouse() const
 249 {
 250         FL_Coord x, y;
 251         unsigned int button;
 252         fl_get_mouse(&x, &y, &button);
 253         FL_Coord ulx = work_area->form->x + work_area->x;
 254         FL_Coord uly = work_area->form->y + work_area->y;
 255         FL_Coord w = work_area->w;
 256         FL_Coord h = work_area->h;
 257         if (x > ulx && y > uly && x < ulx + h && y < uly + w)
 258                 return true;
 259         return false;
 260 }
 261
 262
 263 void WorkArea::resize(int xpos, int ypos, int width, int height)
 264 {
 265         fl_freeze_all_forms();
 266
 267         int const bw = int(abs(fl_get_border_width()));
 268
 269         // a box
 270         fl_set_object_geometry(backgroundbox, xpos, ypos, width - 15, height);
 271
 272         //
 273         // THE SCROLLBAR
 274         //
 275         fl_set_object_geometry(scrollbar, xpos + width - 15,
 276                                ypos, 17, height);
 277
 278         // Create the workarea pixmap
 279         createPixmap(width - 15 - 2 * bw, height - 2 * bw);
 280
 281         // the free object
 282         fl_set_object_geometry(work_area, xpos + bw, ypos + bw,
 283                                width - 15 - 2 * bw,
 284                                height - 2 * bw);
 285
 286         fl_unfreeze_all_forms();
 287 }
 288
 289
 290 namespace {
 291 void destroy_object(FL_OBJECT * obj)
 292 {
 293         if (!obj)
 294                 return;
 295
 296         if (obj->visible) {
 297                 fl_hide_object(obj);
 298         }
 299         fl_delete_object(obj);
 300         fl_free_object(obj);
 301 }
 302 } // namespace anon
 303
 304
 305 void WorkArea::createPixmap(int width, int height)
 306 {
 307         // Three calls to createPixmap are needed to draw the initial view
 308         // of LyX. Any more and the splash is destroyed.
 309         static int counter = 0;
 310         if (++counter == 4) {
 311                 destroy_object(splash_);
 312                 splash_ = 0;
 313                 destroy_object(splash_text_);
 314                 splash_text_ = 0;
 315         }
 316
 317         static int cur_width = -1;
 318         static int cur_height = -1;
 319
 320         if (cur_width == width && cur_height == height && workareapixmap)
 321                 return;
 322
 323         cur_width = width;
 324         cur_height = height;
 325
 326         if (workareapixmap)
 327                 XFreePixmap(fl_get_display(), workareapixmap);
 328
 329         if (lyxerr.debugging(Debug::WORKAREA))
 330                 lyxerr << "Creating pixmap ("
 331                        << width << 'x' << height << ")" << endl;
 332
 333         workareapixmap = XCreatePixmap(fl_get_display(),
 334                                        RootWindow(fl_get_display(), 0),
 335                                        width,
 336                                        height,
 337                                        fl_get_visual_depth());
 338         if (lyxerr.debugging(Debug::WORKAREA))
 339                 lyxerr << "\tpixmap=" << workareapixmap << endl;
 340 }
 341
 342
 343 void WorkArea::greyOut() const
 344 {
 345         if (!splash_) {
 346                 fl_winset(FL_ObjWin(work_area));
 347                 fl_rectangle(1, work_area->x, work_area->y,
 348                              work_area->w, work_area->h, FL_GRAY63);
 349         }
 350 }
 351
 352
 353 void WorkArea::setFocus() const
 354 {
 355         fl_set_focus_object(work_area->form, work_area);
 356 }
 357
 358
 359 void WorkArea::setScrollbar(double pos, double length_fraction) const
 360 {
 361         fl_set_scrollbar_value(scrollbar, pos);
 362         fl_set_scrollbar_size(scrollbar, scrollbar->h * length_fraction);
 363 }
 364
 365
 366 void WorkArea::setScrollbarBounds(double l1, double l2) const
 367 {
 368         fl_set_scrollbar_bounds(scrollbar, l1, l2);
 369 }
 370
 371
 372 void WorkArea::setScrollbarIncrements(double inc) const
 373 {
 374         fl_set_scrollbar_increment(scrollbar, work_area->h - inc, inc);
 375 }
 376
 377
 378 // Callback for scrollbar slider
 379 void WorkArea::scroll_cb(FL_OBJECT * ob, long)
 380 {
 381         WorkArea * area = static_cast<WorkArea*>(ob->u_vdata);
 382         // If we really want the accellerating scroll we can do that
 383         // from here. IMHO that is a waste of effort since we already
 384         // have other ways to move fast around in the document. (Lgb)
 385         area->scrollCB(fl_get_scrollbar_value(ob));
 386         waitForX();
 387 }
 388
 389
 390 int WorkArea::work_area_handler(FL_OBJECT * ob, int event,
 391                                 FL_Coord, FL_Coord ,
 392                                 int key, void * xev)
 393 {
 394         static int x_old = -1;
 395         static int y_old = -1;
 396         static long scrollbar_value_old = -1;
 397
 398         XEvent * ev = static_cast<XEvent*>(xev);
 399         WorkArea * area = static_cast<WorkArea*>(ob->u_vdata);
 400
 401         if (!area) return 1;
 402
 403         switch (event) {
 404         case FL_DRAW:
 405                 if (!area->work_area ||
 406                     !area->work_area->form->visible)
 407                         return 1;
 408                 lyxerr[Debug::WORKAREA] << "Workarea event: DRAW" << endl;
 409                 area->createPixmap(area->workWidth(), area->height());
 410                 area->workAreaExpose();
 411                 break;
 412         case FL_PUSH:
 413                 if (!ev || ev->xbutton.button == 0) break;
 414                 // Should really have used xbutton.state
 415                 lyxerr[Debug::WORKAREA] << "Workarea event: PUSH" << endl;
 416                 area->workAreaButtonPress(ev->xbutton.x - ob->x,
 417                                           ev->xbutton.y - ob->y,
 418                                           x_button_state(ev->xbutton.button));
 419                 break;
 420         case FL_RELEASE:
 421                 if (!ev || ev->xbutton.button == 0) break;
 422                 // Should really have used xbutton.state
 423                 lyxerr[Debug::WORKAREA] << "Workarea event: RELEASE" << endl;
 424                 area->workAreaButtonRelease(ev->xbutton.x - ob->x,
 425                                       ev->xbutton.y - ob->y,
 426                                       x_button_state(ev->xbutton.button));
 427                 break;
 428 #if FL_REVISION < 89
 429         case FL_MOUSE:
 430 #else
 431         case FL_DRAG:
 432 #endif
 433                 if (!ev || ! area->scrollbar) break;
 434                 if (ev->xmotion.x != x_old ||
 435                     ev->xmotion.y != y_old ||
 436                     fl_get_scrollbar_value(area->scrollbar) != scrollbar_value_old
 437                         ) {
 438                         lyxerr[Debug::WORKAREA] << "Workarea event: MOUSE" << endl;
 439                         area->workAreaMotionNotify(ev->xmotion.x - ob->x,
 440                                              ev->xmotion.y - ob->y,
 441                                              x_motion_state(ev->xbutton.state));
 442                 }
 443                 break;
 444 #if FL_REVISION < 89
 445         case FL_KEYBOARD:
 446 #else
 447         case FL_KEYPRESS:
 448 #endif
 449         {
 450                 lyxerr[Debug::WORKAREA] << "Workarea event: KEYBOARD" << endl;
 451
 452                 KeySym keysym = 0;
 453                 char dummy[1];
 454                 XKeyEvent * xke = reinterpret_cast<XKeyEvent *>(ev);
 455 #if FL_REVISION < 89 || (FL_REVISION == 89 && FL_FIXLEVEL < 5)
 456                 // XForms < 0.89.5 does not have compose support
 457                 // so we are using our own compose support
 458                 LyXLookupString(ev, dummy, 1, &keysym);
 459 #else
 460                 XLookupString(xke, dummy, 1, &keysym, 0);
 461 //              int num_keys = XLookupString(xke, dummy, 10, &keysym, &xcs);
 462 //              lyxerr << "We have " << num_keys << " keys in the returned buffer" << endl;
 463 //              lyxerr << "Our dummy string is " << dummy << endl;
 464 #endif
 465                 if (lyxerr.debugging(Debug::KEY)) {
 466                         char const * tmp = XKeysymToString(key);
 467                         char const * tmp2 = XKeysymToString(keysym);
 468                         string const stm = (tmp ? tmp : "");
 469                         string const stm2 = (tmp2 ? tmp2 : "");
 470
 471                         lyxerr[Debug::KEY] << "WorkArea: Key is `" << stm << "' ["
 472                                << key << "]" << endl;
 473                         lyxerr[Debug::KEY] << "WorkArea: Keysym is `" << stm2 << "' ["
 474                                << keysym << "]" << endl;
 475                 }
 476
 477 #if FL_REVISION < 89 || (FL_REVISION == 89 && FL_FIXLEVEL < 5)
 478                 if (keysym == NoSymbol) {
 479                         lyxerr[Debug::KEY]
 480                                 << "Empty kdb action (probably composing)"
 481                                 << endl;
 482                         break;
 483                 }
 484                 KeySym ret_key = keysym;
 485 #else
 486                 // Note that we need this handling because of a bug
 487                 // in XForms 0.89, if this bug is resolved in the way I hope
 488                 // we can just use the keysym directly with out looking
 489                 // at key at all. (Lgb)
 490                 KeySym ret_key = 0;
 491                 if (!key) {
 492                         // We migth have to add more keysyms here also,
 493                         // we will do that as the issues arise. (Lgb)
 494                         if (keysym == XK_space) {
 495                                 ret_key = keysym;
 496                                 lyxerr[Debug::KEY] << "Using keysym [A]"
 497                                                    << endl;
 498                         } else
 499                                 break;
 500                 } else {
 501                         // It seems that this was a bit optimistic...
 502                         // With this hacking things seems to be better (Lgb)
 503                         //if (!iscntrl(key)) {
 504                         //      ret_key = key;
 505                         //      lyxerr[Debug::KEY]
 506                         //              << "Using key [B]\n"
 507                         //              << "Uchar["
 508                         //              << static_cast<unsigned char>(key)
 509                         //              << endl;
 510                         //} else {
 511                                 ret_key = (keysym ? keysym : key);
 512                                 lyxerr[Debug::KEY] << "Using keysym [B]"
 513                                                    << endl;
 514                                 //}
 515                 }
 516
 517 #endif
 518                 unsigned int const ret_state = xke->state;
 519
 520                 // If you have a better way to handle "wild-output" of
 521                 // characters after the key has been released than the one
 522                 // below, please contact me. (Lgb)
 523                 static Time last_time_pressed;
 524                 static unsigned int last_key_pressed;
 525                 static unsigned int last_state_pressed;
 526                 lyxerr[Debug::KEY] << "Workarea Diff: "
 527                                    << xke->time - last_time_pressed
 528                                    << endl;
 529                 if (xke->time - last_time_pressed < 25 // should perhaps be tunable
 530                     && ret_state == last_state_pressed
 531                     && xke->keycode == last_key_pressed) {
 532                         lyxerr[Debug::KEY]
 533                                 << "Workarea: Purging X events." << endl;
 534                         //lyxerr << "Workarea Events: "
 535                         //       << XEventsQueued(fl_get_display(), QueuedAlready)
 536                         //       << endl;
 537                         if (XEventsQueued(fl_get_display(), QueuedAlready) > 0)
 538                                 XSync(fl_get_display(), 1);
 539                         // This purge make f.ex. scrolling stop immidiatly when
 540                         // releasing the PageDown button. The question is if
 541                         // this purging of XEvents can cause any harm...
 542                         // after some testing I can see no problems, but
 543                         // I'd like other reports too.
 544                         break;
 545                 }
 546                 last_time_pressed = xke->time;
 547                 last_key_pressed = xke->keycode;
 548                 last_state_pressed = ret_state;
 549
 550                 area->workAreaKeyPress(ret_key, x_key_state(ret_state));
 551         }
 552         break;
 553
 554 #if FL_REVISION >= 89
 555         case FL_KEYRELEASE:
 556                 lyxerr[Debug::WORKAREA] << "Workarea event: KEYRELEASE" << endl;
 557                 break;
 558 #endif
 559
 560         case FL_FOCUS:
 561                 lyxerr[Debug::WORKAREA] << "Workarea event: FOCUS" << endl;
 562                 area->workAreaFocus();
 563                 break;
 564         case FL_UNFOCUS:
 565                 lyxerr[Debug::WORKAREA] << "Workarea event: UNFOCUS" << endl;
 566                 area->workAreaUnfocus();
 567                 break;
 568         case FL_ENTER:
 569                 lyxerr[Debug::WORKAREA] << "Workarea event: ENTER" << endl;
 570                 area->workAreaEnter();
 571                 break;
 572         case FL_LEAVE:
 573                 lyxerr[Debug::WORKAREA] << "Workarea event: LEAVE" << endl;
 574                 area->workAreaLeave();
 575                 break;
 576         case FL_DBLCLICK:
 577                 if (!ev) break;
 578                 lyxerr[Debug::WORKAREA] << "Workarea event: DBLCLICK" << endl;
 579                 area->workAreaDoubleClick(ev->xbutton.x - ob->x,
 580                                           ev->xbutton.y - ob->y,
 581                                           x_button_state(ev->xbutton.button));
 582                 break;
 583         case FL_TRPLCLICK:
 584                 if (!ev) break;
 585                 lyxerr[Debug::WORKAREA] << "Workarea event: TRPLCLICK" << endl;
 586                 area->workAreaTripleClick(ev->xbutton.x - ob->x,
 587                                           ev->xbutton.y - ob->y,
 588                                           x_button_state(ev->xbutton.button));
 589                 break;
 590         case FL_OTHER:
 591                 if (!ev) break;
 592                 lyxerr[Debug::WORKAREA] << "Workarea event: OTHER" << endl;
 593                 break;
 594         }
 595
 596         return 1;
 597 }
 598
 599
 600 namespace {
 601
 602 string clipboard_selection;
 603 bool clipboard_read = false;
 604
 605 extern "C" {
 606
 607         static
 608         int request_clipboard_cb(FL_OBJECT * /*ob*/, long /*type*/,
 609                                  void const * data, long size)
 610         {
 611                 clipboard_selection.erase();
 612
 613                 if (size > 0)
 614                         clipboard_selection.reserve(size);
 615                 for (int i = 0; i < size; ++i)
 616                         clipboard_selection +=
 617                                 static_cast<char const *>(data)[i];
 618                 clipboard_read = true;
 619                 return 0;
 620         }
 621
 622 }
 623
 624 } // namespace anon
 625
 626
 627 int WorkArea::event_cb(XEvent * xev)
 628 {
 629         int ret = 0;
 630         switch (xev->type) {
 631                 case SelectionRequest:
 632                         lyxerr[Debug::GUI] << "X requested selection." << endl;
 633                         selectionRequested.emit();
 634                         break;
 635                 case SelectionClear:
 636                         lyxerr[Debug::GUI] << "Lost selection." << endl;
 637                         selectionLost.emit();
 638                         break;
 639         }
 640         return ret;
 641 }
 642
 643
 644 void WorkArea::haveSelection(bool yes) const
 645 {
 646         if (!yes) {
 647                 XSetSelectionOwner(fl_get_display(), XA_PRIMARY, None, CurrentTime);
 648                 return;
 649         }
 650
 651         XSetSelectionOwner(fl_get_display(), XA_PRIMARY, FL_ObjWin(work_area), CurrentTime);
 652 }
 653
 654
 655 string const WorkArea::getClipboard() const
 656 {
 657         clipboard_read = false;
 658
 659         if (fl_request_clipboard(work_area, 0, request_clipboard_cb) == -1)
 660                 return string();
 661
 662         XEvent ev;
 663
 664         while (!clipboard_read) {
 665                 if (fl_check_forms() == FL_EVENT) {
 666                         fl_XNextEvent(&ev);
 667                         lyxerr << "Received unhandled X11 event" << endl;
 668                         lyxerr << "Type: 0x" << hex << ev.xany.type <<
 669                                 " Target: 0x" << hex << ev.xany.window << endl;
 670                 }
 671         }
 672         return clipboard_selection;
 673 }
 674
 675
 676 void WorkArea::putClipboard(string const & s) const
 677 {
 678         static string hold;
 679         hold = s;
 680
 681         fl_stuff_clipboard(work_area, 0, hold.data(), hold.size(), 0);
 682 }