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