src/frontends/xforms/XWorkArea.C

   1 /**
   2  * \file XWorkArea.C
   3  * Copyright 1995-2002 the LyX Team
   4  * Read the file COPYING
   5  *
   6  * \author unknown
   7  * \author John Levon <moz@compsoc.man.ac.uk>
   8  */
   9
  10 #include <config.h>
  11
  12 #ifdef __GNUG__
  13 #pragma implementation
  14 #endif
  15
  16 #include "XWorkArea.h"
  17 #include "debug.h"
  18 #include "LyXView.h"
  19 #include "lyxrc.h" // lyxrc.show_banner
  20 #include "version.h" // lyx_version
  21
  22 #if FL_VERSION < 1 && (FL_REVISION < 89 || (FL_REVISION == 89 && FL_FIXLEVEL < 5))
  23 #include "lyxlookup.h"
  24 #endif
  25
  26 #include "support/filetools.h" // LibFileSearch
  27 #include "support/lstrings.h"
  28 #include "support/LAssert.h"
  29
  30 #include <cmath>
  31 #include <cctype>
  32
  33 // xforms doesn't define this (but it should be in <forms.h>).
  34 extern "C"
  35 FL_APPEVENT_CB fl_set_preemptive_callback(Window, FL_APPEVENT_CB, void *);
  36
  37 using std::endl;
  38 using std::abs;
  39 using std::hex;
  40
  41 namespace {
  42
  43 inline
  44 void waitForX()
  45 {
  46         XSync(fl_get_display(), 0);
  47 }
  48
  49
  50 void setXtermCursor(Window win)
  51 {
  52         static Cursor cursor;
  53         static bool cursor_undefined = true;
  54         if (cursor_undefined) {
  55                 cursor = XCreateFontCursor(fl_get_display(), XC_xterm);
  56                 XFlush(fl_get_display());
  57                 cursor_undefined = false;
  58         }
  59         XDefineCursor(fl_get_display(), win, cursor);
  60         XFlush(fl_get_display());
  61 }
  62
  63
  64 // FIXME !
  65 mouse_button::state x_button_state(unsigned int button)
  66 {
  67         mouse_button::state b = mouse_button::none;
  68         switch (button) {
  69                 case Button1:
  70                         b = mouse_button::button1;
  71                         break;
  72                 case Button2:
  73                         b = mouse_button::button2;
  74                         break;
  75                 case Button3:
  76                         b = mouse_button::button3;
  77                         break;
  78                 case Button4:
  79                         b = mouse_button::button4;
  80                         break;
  81                 case Button5:
  82                         b = mouse_button::button5;
  83                         break;
  84                 default: // FIXME
  85                         break;
  86         }
  87         return b;
  88 }
  89
  90
  91 // FIXME
  92 mouse_button::state x_motion_state(unsigned int state)
  93 {
  94         mouse_button::state b = mouse_button::none;
  95         if (state & Button1MotionMask)
  96                 b |= mouse_button::button1;
  97         if (state & Button2MotionMask)
  98                 b |= mouse_button::button2;
  99         if (state & Button3MotionMask)
 100                 b |= mouse_button::button3;
 101         if (state & Button4MotionMask)
 102                 b |= mouse_button::button4;
 103         if (state & Button5MotionMask)
 104                 b |= mouse_button::button5;
 105         return b;
 106 }
 107
 108
 109 key_modifier::state x_key_state(unsigned int state)
 110 {
 111         key_modifier::state k = key_modifier::none;
 112         if (state & ControlMask)
 113                 k |= key_modifier::ctrl;
 114         if (state & ShiftMask)
 115                 k |= key_modifier::shift;
 116         if (state & Mod1Mask)
 117                 k |= key_modifier::alt;
 118         return k;
 119 }
 120
 121
 122 } // anon namespace
 123
 124
 125 extern "C" {
 126         // Just a bunch of C wrappers around static members of WorkArea
 127         static
 128         void C_WorkArea_scroll_cb(FL_OBJECT * ob, long)
 129         {
 130                 WorkArea * area = static_cast<WorkArea*>(ob->u_vdata);
 131                 area->scroll_cb();
 132         }
 133
 134
 135         static
 136         int C_WorkArea_work_area_handler(FL_OBJECT * ob, int event,
 137                                          FL_Coord, FL_Coord,
 138                                          int key, void * xev)
 139         {
 140                 return WorkArea::work_area_handler(ob, event,
 141                                                    0, 0, key, xev);
 142         }
 143
 144         static
 145         int C_WorkAreaEventCB(FL_FORM * form, void * xev) {
 146                 WorkArea * wa = static_cast<WorkArea*>(form->u_vdata);
 147                 return wa->event_cb(static_cast<XEvent*>(xev));
 148         }
 149 }
 150
 151
 152 WorkArea::WorkArea(int x, int y, int w, int h)
 153         : splash_(0), splash_text_(0), workareapixmap(0), painter_(*this)
 154 {
 155         fl_freeze_all_forms();
 156
 157         //
 158         FL_OBJECT * obj;
 159
 160         // a box
 161         if (lyxerr.debugging(Debug::WORKAREA))
 162                 lyxerr << "\tbackground box: +"
 163                        << x << '+' << y << ' '
 164                        << w - 15 << 'x' << h << endl;
 165         backgroundbox = obj = fl_add_box(FL_BORDER_BOX,
 166                                          x, y,
 167                                          w - 15,
 168                                          h, "");
 169         fl_set_object_resize(obj, FL_RESIZE_ALL);
 170         fl_set_object_gravity(obj, NorthWestGravity, SouthEastGravity);
 171
 172         // Add a splash screen to the centre of the work area
 173         string const splash_file = (lyxrc.show_banner) ?
 174                 LibFileSearch("images", "banner", "xpm") : string();
 175
 176         if (!splash_file.empty()) {
 177                 int const splash_w = 425;
 178                 int const splash_h = 290;
 179                 int const splash_x = x + (w - 15 - splash_w) / 2;
 180                 int const splash_y = y + (h - splash_h) / 2;
 181                 splash_ = obj =
 182                         fl_add_pixmapbutton(FL_NORMAL_BUTTON,
 183                                             splash_x, splash_y,
 184                                             splash_w, splash_h, "");
 185                 fl_set_pixmapbutton_file(obj, splash_file.c_str());
 186                 fl_set_pixmapbutton_focus_outline(obj, 3);
 187                 fl_set_object_boxtype(obj, FL_NO_BOX);
 188
 189                 int const text_x = splash_x + 260;
 190                 int const text_y = splash_y + 255;
 191                 splash_text_ = obj =
 192                         fl_add_text(FL_NORMAL_TEXT, text_x, text_y, 160, 16,
 193                                     lyx_version);
 194                 fl_set_object_lsize(obj, FL_NORMAL_SIZE);
 195                 fl_mapcolor(FL_FREE_COL2, 0x2b, 0x47, 0x82);
 196                 fl_mapcolor(FL_FREE_COL3, 0xe1, 0xd2, 0x9b);
 197                 fl_set_object_color(obj, FL_FREE_COL2, FL_FREE_COL2);
 198                 fl_set_object_lcol(obj, FL_FREE_COL3);
 199                 fl_set_object_lalign(obj, FL_ALIGN_LEFT|FL_ALIGN_INSIDE);
 200                 fl_set_object_lstyle(obj, FL_BOLD_STYLE);
 201         }
 202
 203         scrollbar = obj = fl_add_scrollbar(FL_VERT_SCROLLBAR,
 204                                            x + w - 15,
 205                                            y, 17, h, "");
 206         fl_set_object_boxtype(obj, FL_UP_BOX);
 207         fl_set_object_resize(obj, FL_RESIZE_ALL);
 208         fl_set_object_gravity(obj, NorthEastGravity, SouthEastGravity);
 209         obj->u_vdata = this;
 210         fl_set_object_callback(obj, C_WorkArea_scroll_cb, 0);
 211         fl_set_scrollbar_bounds(scrollbar, 0.0, 0.0);
 212         fl_set_scrollbar_value(scrollbar, 0.0);
 213         fl_set_scrollbar_size(scrollbar, scrollbar->h);
 214
 215         ///
 216         /// The free object
 217
 218         int const bw = int(abs(fl_get_border_width()));
 219
 220         // Create the workarea pixmap
 221         createPixmap(w - 15 - 2 * bw, h - 2 * bw);
 222
 223         // We add this object as late as possible to avoit problems
 224         // with drawing.
 225         if (lyxerr.debugging(Debug::WORKAREA))
 226                 lyxerr << "\tfree object: +"
 227                        << x + bw << '+' << y + bw << ' '
 228                        << w - 15 - 2 * bw << 'x'
 229                        << h - 2 * bw << endl;
 230
 231         work_area = obj = fl_add_free(FL_ALL_FREE,
 232                                       x + bw, y + bw,
 233                                       w - 15 - 2 * bw, // scrollbarwidth
 234                                       h - 2 * bw, "",
 235                                       C_WorkArea_work_area_handler);
 236         obj->wantkey = FL_KEY_ALL;
 237         obj->u_vdata = this; /* This is how we pass the WorkArea
 238                                 to the work_area_handler. */
 239         fl_set_object_boxtype(obj,FL_DOWN_BOX);
 240         fl_set_object_resize(obj, FL_RESIZE_ALL);
 241         fl_set_object_gravity(obj, NorthWestGravity, SouthEastGravity);
 242
 243         /// X selection hook - xforms gets it wrong
 244         fl_current_form->u_vdata = this;
 245         fl_register_raw_callback(fl_current_form, FL_ALL_EVENT, C_WorkAreaEventCB);
 246
 247         fl_unfreeze_all_forms();
 248 }
 249
 250
 251 WorkArea::~WorkArea()
 252 {
 253         if (workareapixmap)
 254                 XFreePixmap(fl_get_display(), workareapixmap);
 255 }
 256
 257
 258 void WorkArea::resize(int xpos, int ypos, int width, int height)
 259 {
 260         fl_freeze_all_forms();
 261
 262         int const bw = int(abs(fl_get_border_width()));
 263
 264         // a box
 265         fl_set_object_geometry(backgroundbox, xpos, ypos, width - 15, height);
 266
 267         //
 268         // THE SCROLLBAR
 269         //
 270         fl_set_object_geometry(scrollbar, xpos + width - 15,
 271                                ypos, 17, height);
 272
 273         // Create the workarea pixmap
 274         createPixmap(width - 15 - 2 * bw, height - 2 * bw);
 275
 276         // the free object
 277         fl_set_object_geometry(work_area, xpos + bw, ypos + bw,
 278                                width - 15 - 2 * bw,
 279                                height - 2 * bw);
 280
 281         fl_unfreeze_all_forms();
 282 }
 283
 284
 285 namespace {
 286 void destroy_object(FL_OBJECT * obj)
 287 {
 288         if (!obj)
 289                 return;
 290
 291         if (obj->visible) {
 292                 fl_hide_object(obj);
 293         }
 294         fl_delete_object(obj);
 295         fl_free_object(obj);
 296 }
 297 } // namespace anon
 298
 299
 300 void WorkArea::createPixmap(int width, int height)
 301 {
 302         // Three calls to createPixmap are needed to draw the initial view
 303         // of LyX. Any more and the splash is destroyed.
 304         static int counter = 0;
 305         if (++counter == 4) {
 306                 destroy_object(splash_);
 307                 splash_ = 0;
 308                 destroy_object(splash_text_);
 309                 splash_text_ = 0;
 310         }
 311
 312         static int cur_width = -1;
 313         static int cur_height = -1;
 314
 315         if (cur_width == width && cur_height == height && workareapixmap)
 316                 return;
 317
 318         cur_width = width;
 319         cur_height = height;
 320
 321         if (workareapixmap)
 322                 XFreePixmap(fl_get_display(), workareapixmap);
 323
 324         if (lyxerr.debugging(Debug::WORKAREA))
 325                 lyxerr << "Creating pixmap ("
 326                        << width << 'x' << height << ")" << endl;
 327
 328         workareapixmap = XCreatePixmap(fl_get_display(),
 329                                        RootWindow(fl_get_display(), 0),
 330                                        width,
 331                                        height,
 332                                        fl_get_visual_depth());
 333         if (lyxerr.debugging(Debug::WORKAREA))
 334                 lyxerr << "\tpixmap=" << workareapixmap << endl;
 335 }
 336
 337
 338 void WorkArea::greyOut() const
 339 {
 340         if (!splash_) {
 341                 fl_winset(FL_ObjWin(work_area));
 342                 fl_rectangle(1, work_area->x, work_area->y,
 343                              work_area->w, work_area->h, FL_GRAY63);
 344         }
 345 }
 346
 347
 348 void WorkArea::setFocus() const
 349 {
 350         fl_set_focus_object(work_area->form, work_area);
 351 }
 352
 353
 354 void WorkArea::setScrollbarParams(int height, int pos, int line_height)
 355 {
 356         // we need to cache this for scroll_cb
 357         doc_height_ = height;
 358
 359         if (height == 0) {
 360                 fl_set_scrollbar_value(scrollbar, 0.0);
 361                 fl_set_scrollbar_size(scrollbar, scrollbar->h);
 362                 return;
 363         }
 364
 365         long const work_height = workHeight();
 366
 367         lyxerr[Debug::GUI] << "scroll: height now " << height << endl;
 368         lyxerr[Debug::GUI] << "scroll: work_height " << work_height << endl;
 369
 370         /* If the text is smaller than the working area, the scrollbar
 371          * maximum must be the working area height. No scrolling will
 372          * be possible */
 373         if (height <= work_height) {
 374                 lyxerr[Debug::GUI] << "scroll: doc smaller than workarea !" << endl;
 375                 fl_set_scrollbar_bounds(scrollbar, 0.0, 0.0);
 376                 fl_set_scrollbar_value(scrollbar, pos);
 377                 fl_set_scrollbar_size(scrollbar, scrollbar->h);
 378                 return;
 379         }
 380
 381         fl_set_scrollbar_bounds(scrollbar, 0.0, height - work_height);
 382         fl_set_scrollbar_increment(scrollbar, work_area->h - line_height, line_height);
 383
 384         fl_set_scrollbar_value(scrollbar, pos);
 385
 386         double const slider_size =
 387                 (height == 0) ? 1.0 : 1.0 / double(height);
 388
 389         fl_set_scrollbar_size(scrollbar, scrollbar->h * slider_size);
 390 }
 391
 392
 393 // callback for scrollbar slider
 394 void WorkArea::scroll_cb()
 395 {
 396         double const val = fl_get_scrollbar_value(scrollbar);
 397         lyxerr[Debug::GUI] << "scroll: val: " << val << endl;
 398         lyxerr[Debug::GUI] << "scroll: height: " << scrollbar->h << endl;
 399         lyxerr[Debug::GUI] << "scroll: docheight: " << doc_height_ << endl;
 400         scrollDocView(int(val));
 401         waitForX();
 402 }
 403
 404
 405 int WorkArea::work_area_handler(FL_OBJECT * ob, int event,
 406                                 FL_Coord, FL_Coord ,
 407                                 int key, void * xev)
 408 {
 409         static int x_old = -1;
 410         static int y_old = -1;
 411         static long scrollbar_value_old = -1;
 412
 413         XEvent * ev = static_cast<XEvent*>(xev);
 414         WorkArea * area = static_cast<WorkArea*>(ob->u_vdata);
 415
 416         if (!area) return 1;
 417
 418         switch (event) {
 419         case FL_DRAW:
 420                 if (!area->work_area ||
 421                     !area->work_area->form->visible)
 422                         return 1;
 423                 lyxerr[Debug::WORKAREA] << "Workarea event: DRAW" << endl;
 424                 area->createPixmap(area->workWidth(), area->workHeight());
 425                 area->workAreaExpose();
 426                 break;
 427         case FL_PUSH:
 428                 if (!ev || ev->xbutton.button == 0) break;
 429                 // Should really have used xbutton.state
 430                 lyxerr[Debug::WORKAREA] << "Workarea event: PUSH" << endl;
 431                 area->workAreaButtonPress(ev->xbutton.x - ob->x,
 432                                           ev->xbutton.y - ob->y,
 433                                           x_button_state(ev->xbutton.button));
 434                 break;
 435         case FL_RELEASE:
 436                 if (!ev || ev->xbutton.button == 0) break;
 437                 // Should really have used xbutton.state
 438                 lyxerr[Debug::WORKAREA] << "Workarea event: RELEASE" << endl;
 439                 area->workAreaButtonRelease(ev->xbutton.x - ob->x,
 440                                       ev->xbutton.y - ob->y,
 441                                       x_button_state(ev->xbutton.button));
 442                 break;
 443 #if FL_VERSION < 1 && FL_REVISION < 89
 444         case FL_MOUSE:
 445 #else
 446         case FL_DRAG:
 447 #endif
 448                 if (!ev || ! area->scrollbar) break;
 449                 if (ev->xmotion.x != x_old ||
 450                     ev->xmotion.y != y_old ||
 451                     fl_get_scrollbar_value(area->scrollbar) != scrollbar_value_old
 452                         ) {
 453                         lyxerr[Debug::WORKAREA] << "Workarea event: MOUSE" << endl;
 454                         area->workAreaMotionNotify(ev->xmotion.x - ob->x,
 455                                              ev->xmotion.y - ob->y,
 456                                              x_motion_state(ev->xbutton.state));
 457                 }
 458                 break;
 459 #if FL_VERSION < 1 && FL_REVISION < 89
 460         case FL_KEYBOARD:
 461 #else
 462         case FL_KEYPRESS:
 463 #endif
 464         {
 465                 lyxerr[Debug::WORKAREA] << "Workarea event: KEYBOARD" << endl;
 466
 467                 KeySym keysym = 0;
 468                 char dummy[1];
 469                 XKeyEvent * xke = reinterpret_cast<XKeyEvent *>(ev);
 470 #if FL_VERSION < 1 && (FL_REVISION < 89 || (FL_REVISION == 89 && FL_FIXLEVEL < 5))
 471                 // XForms < 0.89.5 does not have compose support
 472                 // so we are using our own compose support
 473                 LyXLookupString(ev, dummy, 1, &keysym);
 474 #else
 475                 XLookupString(xke, dummy, 1, &keysym, 0);
 476 //              int num_keys = XLookupString(xke, dummy, 10, &keysym, &xcs);
 477 //              lyxerr << "We have " << num_keys << " keys in the returned buffer" << endl;
 478 //              lyxerr << "Our dummy string is " << dummy << endl;
 479 #endif
 480                 if (lyxerr.debugging(Debug::KEY)) {
 481                         char const * tmp = XKeysymToString(key);
 482                         char const * tmp2 = XKeysymToString(keysym);
 483                         string const stm = (tmp ? tmp : "");
 484                         string const stm2 = (tmp2 ? tmp2 : "");
 485
 486                         lyxerr[Debug::KEY] << "WorkArea: Key is `" << stm << "' ["
 487                                << key << "]" << endl;
 488                         lyxerr[Debug::KEY] << "WorkArea: Keysym is `" << stm2 << "' ["
 489                                << keysym << "]" << endl;
 490                 }
 491
 492 #if FL_VERSION < 1 && (FL_REVISION < 89 || (FL_REVISION == 89 && FL_FIXLEVEL < 5))
 493                 if (keysym == NoSymbol) {
 494                         lyxerr[Debug::KEY]
 495                                 << "Empty kdb action (probably composing)"
 496                                 << endl;
 497                         break;
 498                 }
 499                 KeySym ret_key = keysym;
 500 #else
 501                 // Note that we need this handling because of a bug
 502                 // in XForms 0.89, if this bug is resolved in the way I hope
 503                 // we can just use the keysym directly with out looking
 504                 // at key at all. (Lgb)
 505                 KeySym ret_key = 0;
 506                 if (!key) {
 507                         // We migth have to add more keysyms here also,
 508                         // we will do that as the issues arise. (Lgb)
 509                         if (keysym == XK_space) {
 510                                 ret_key = keysym;
 511                                 lyxerr[Debug::KEY] << "Using keysym [A]"
 512                                                    << endl;
 513                         } else
 514                                 break;
 515                 } else {
 516                         // It seems that this was a bit optimistic...
 517                         // With this hacking things seems to be better (Lgb)
 518                         //if (!iscntrl(key)) {
 519                         //      ret_key = key;
 520                         //      lyxerr[Debug::KEY]
 521                         //              << "Using key [B]\n"
 522                         //              << "Uchar["
 523                         //              << static_cast<unsigned char>(key)
 524                         //              << endl;
 525                         //} else {
 526                                 ret_key = (keysym ? keysym : key);
 527                                 lyxerr[Debug::KEY] << "Using keysym [B]"
 528                                                    << endl;
 529                                 //}
 530                 }
 531
 532 #endif
 533                 unsigned int const ret_state = xke->state;
 534
 535                 // If you have a better way to handle "wild-output" of
 536                 // characters after the key has been released than the one
 537                 // below, please contact me. (Lgb)
 538                 static Time last_time_pressed;
 539                 static unsigned int last_key_pressed;
 540                 static unsigned int last_state_pressed;
 541                 lyxerr[Debug::KEY] << "Workarea Diff: "
 542                                    << xke->time - last_time_pressed
 543                                    << endl;
 544                 if (xke->time - last_time_pressed < 25 // should perhaps be tunable
 545                     && ret_state == last_state_pressed
 546                     && xke->keycode == last_key_pressed) {
 547                         lyxerr[Debug::KEY]
 548                                 << "Workarea: Purging X events." << endl;
 549                         //lyxerr << "Workarea Events: "
 550                         //       << XEventsQueued(fl_get_display(), QueuedAlready)
 551                         //       << endl;
 552                         if (XEventsQueued(fl_get_display(), QueuedAlready) > 0)
 553                                 XSync(fl_get_display(), 1);
 554                         // This purge make f.ex. scrolling stop immidiatly when
 555                         // releasing the PageDown button. The question is if
 556                         // this purging of XEvents can cause any harm...
 557                         // after some testing I can see no problems, but
 558                         // I'd like other reports too.
 559                         break;
 560                 }
 561                 last_time_pressed = xke->time;
 562                 last_key_pressed = xke->keycode;
 563                 last_state_pressed = ret_state;
 564
 565                 area->workAreaKeyPress(ret_key, x_key_state(ret_state));
 566         }
 567         break;
 568
 569 #if FL_VERSION > 0 || FL_REVISION >= 89
 570         case FL_KEYRELEASE:
 571                 lyxerr[Debug::WORKAREA] << "Workarea event: KEYRELEASE" << endl;
 572                 break;
 573 #endif
 574
 575         case FL_FOCUS:
 576                 lyxerr[Debug::WORKAREA] << "Workarea event: FOCUS" << endl;
 577                 area->workAreaFocus();
 578                 break;
 579         case FL_UNFOCUS:
 580                 lyxerr[Debug::WORKAREA] << "Workarea event: UNFOCUS" << endl;
 581                 area->workAreaUnfocus();
 582                 break;
 583         case FL_ENTER:
 584                 lyxerr[Debug::WORKAREA] << "Workarea event: ENTER" << endl;
 585                 break;
 586         case FL_LEAVE:
 587                 lyxerr[Debug::WORKAREA] << "Workarea event: LEAVE" << endl;
 588                 break;
 589         case FL_DBLCLICK:
 590                 if (!ev) break;
 591                 lyxerr[Debug::WORKAREA] << "Workarea event: DBLCLICK" << endl;
 592                 area->workAreaDoubleClick(ev->xbutton.x - ob->x,
 593                                           ev->xbutton.y - ob->y,
 594                                           x_button_state(ev->xbutton.button));
 595                 break;
 596         case FL_TRPLCLICK:
 597                 if (!ev) break;
 598                 lyxerr[Debug::WORKAREA] << "Workarea event: TRPLCLICK" << endl;
 599                 area->workAreaTripleClick(ev->xbutton.x - ob->x,
 600                                           ev->xbutton.y - ob->y,
 601                                           x_button_state(ev->xbutton.button));
 602                 break;
 603         case FL_OTHER:
 604                 if (!ev) break;
 605                 lyxerr[Debug::WORKAREA] << "Workarea event: OTHER" << endl;
 606                 break;
 607         }
 608
 609         return 1;
 610 }
 611
 612
 613 namespace {
 614
 615 string clipboard_selection;
 616 bool clipboard_read = false;
 617
 618 extern "C" {
 619
 620         static
 621         int request_clipboard_cb(FL_OBJECT * /*ob*/, long /*type*/,
 622                                  void const * data, long size)
 623         {
 624                 clipboard_selection.erase();
 625
 626                 if (size > 0)
 627                         clipboard_selection.reserve(size);
 628                 for (int i = 0; i < size; ++i)
 629                         clipboard_selection +=
 630                                 static_cast<char const *>(data)[i];
 631                 clipboard_read = true;
 632                 return 0;
 633         }
 634
 635 }
 636
 637 } // namespace anon
 638
 639
 640 int WorkArea::event_cb(XEvent * xev)
 641 {
 642         int ret = 0;
 643         switch (xev->type) {
 644                 case SelectionRequest:
 645                         lyxerr[Debug::GUI] << "X requested selection." << endl;
 646                         selectionRequested();
 647                         break;
 648                 case SelectionClear:
 649                         lyxerr[Debug::GUI] << "Lost selection." << endl;
 650                         selectionLost();
 651                         break;
 652         }
 653         return ret;
 654 }
 655
 656
 657 void WorkArea::haveSelection(bool yes) const
 658 {
 659         if (!yes) {
 660                 XSetSelectionOwner(fl_get_display(), XA_PRIMARY, None, CurrentTime);
 661                 return;
 662         }
 663
 664         XSetSelectionOwner(fl_get_display(), XA_PRIMARY, FL_ObjWin(work_area), CurrentTime);
 665 }
 666
 667
 668 string const WorkArea::getClipboard() const
 669 {
 670         clipboard_read = false;
 671
 672         if (fl_request_clipboard(work_area, 0, request_clipboard_cb) == -1)
 673                 return string();
 674
 675         XEvent ev;
 676
 677         while (!clipboard_read) {
 678                 if (fl_check_forms() == FL_EVENT) {
 679                         fl_XNextEvent(&ev);
 680                         lyxerr << "Received unhandled X11 event" << endl;
 681                         lyxerr << "Type: 0x" << hex << ev.xany.type <<
 682                                 " Target: 0x" << hex << ev.xany.window << endl;
 683                 }
 684         }
 685         return clipboard_selection;
 686 }
 687
 688
 689 void WorkArea::putClipboard(string const & s) const
 690 {
 691         static string hold;
 692         hold = s;
 693
 694         fl_stuff_clipboard(work_area, 0, hold.data(), hold.size(), 0);
 695 }