src/BufferView.C

   1 // -*- C++ -*-
   2 /* This file is part of
   3  * ======================================================
   4  *
   5  *           LyX, The Document Processor
   6  *
   7  *           Copyright 1995 Matthias Ettrich
   8  *           Copyright 1995-2000 The LyX Team.
   9  *
  10  * ====================================================== */
  11
  12 #include <config.h>
  13
  14 #include <algorithm>
  15 using std::for_each;
  16
  17 #include <cstdlib>
  18 #include <csignal>
  19
  20 #include <unistd.h>
  21 #include <sys/wait.h>
  22
  23 #include "support/lstrings.h"
  24
  25 #ifdef __GNUG__
  26 #pragma implementation
  27 #endif
  28
  29 #include "commandtags.h"
  30 #include "BufferView.h"
  31 #include "bufferlist.h"
  32 #include "LyXView.h"
  33 #include "lyxfunc.h"
  34 #include "insets/lyxinset.h"
  35 #include "minibuffer.h"
  36 #include "lyxscreen.h"
  37
  38 #include "debug.h"
  39 #include "lyx_gui_misc.h"
  40 #include "BackStack.h"
  41 #include "lyxtext.h"
  42 #include "lyx_cb.h"
  43 #include "gettext.h"
  44 #include "layout.h"
  45 #include "TextCache.h"
  46 #include "intl.h"
  47 #include "lyxrc.h"
  48 #include "lyxrow.h"
  49 #include "WorkArea.h"
  50 #ifndef USE_PAINTER
  51 #include "lyxdraw.h"
  52 #endif
  53
  54 using std::find_if;
  55
  56 extern BufferList bufferlist;
  57 extern LyXRC * lyxrc;
  58
  59 void sigchldhandler(pid_t pid, int * status);
  60
  61 extern void SetXtermCursor(Window win);
  62 extern bool input_prohibited;
  63 extern bool selection_possible;
  64 extern char ascii_type;
  65 extern void MenuPasteSelection(char at);
  66 extern InsetUpdateStruct * InsetUpdateList;
  67 extern void UpdateInsetUpdateList();
  68 extern void FreeUpdateTimer();
  69
  70 BufferView::BufferView(LyXView * o, int xpos, int ypos,
  71                        int width, int height)
  72         : owner_(o)
  73 {
  74         buffer_ = 0;
  75         text = 0;
  76         screen = 0;
  77         workarea = new WorkArea(this, xpos, ypos, width, height);
  78         timer_cursor = 0;
  79         create_view();
  80         current_scrollbar_value = 0;
  81         // Activate the timer for the cursor
  82         fl_set_timer(timer_cursor, 0.4);
  83         workarea->setFocus();
  84         work_area_focus = true;
  85         lyx_focus = false;
  86         the_locking_inset = 0;
  87         inset_slept = false;
  88 }
  89
  90
  91 BufferView::~BufferView()
  92 {
  93         delete text;
  94 }
  95
  96
  97 #ifdef USE_PAINTER
  98 Painter & BufferView::painter()
  99 {
 100         return workarea->getPainter();
 101 }
 102 #endif
 103
 104
 105 void BufferView::buffer(Buffer * b)
 106 {
 107         lyxerr[Debug::INFO] << "Setting buffer in BufferView ("
 108                             << b << ")" << endl;
 109         if (buffer_) {
 110                 insetSleep();
 111                 buffer_->delUser(this);
 112
 113                 // Put the old text into the TextCache, but
 114                 // only if the buffer is still loaded.
 115                 // Also set the owner of the test to 0
 116                 text->owner(0);
 117                 textcache.add(text);
 118                 if (lyxerr.debugging())
 119                         textcache.show(lyxerr, "BufferView::buffer");
 120
 121                 text = 0;
 122         }
 123
 124         // Set current buffer
 125         buffer_ = b;
 126
 127         if (bufferlist.getState() == BufferList::CLOSING) return;
 128
 129         // Nuke old image
 130         // screen is always deleted when the buffer is changed.
 131         delete screen;
 132         screen = 0;
 133
 134         // If we are closing the buffer, use the first buffer as current
 135         if (!buffer_) {
 136                 buffer_ = bufferlist.first();
 137         }
 138
 139         if (buffer_) {
 140                 lyxerr[Debug::INFO] << "Buffer addr: " << buffer_ << endl;
 141                 buffer_->addUser(this);
 142                 owner_->getMenus()->showMenus();
 143                 // If we don't have a text object for this, we make one
 144                 if (text == 0)
 145                         resizeCurrentBuffer();
 146                 else {
 147                         updateScreen();
 148                         updateScrollbar();
 149                 }
 150                 screen->first = screen->TopCursorVisible();
 151                 redraw();
 152                 updateAllVisibleBufferRelatedPopups();
 153                 insetWakeup();
 154         } else {
 155                 lyxerr[Debug::INFO] << "  No Buffer!" << endl;
 156                 owner_->getMenus()->hideMenus();
 157                 updateScrollbar();
 158                 workarea->redraw();
 159
 160                 // Also remove all remaining text's from the testcache.
 161                 // (there should not be any!) (if there is any it is a
 162                 // bug!)
 163                 if (lyxerr.debugging())
 164                         textcache.show(lyxerr, "buffer delete all");
 165                 textcache.clear();
 166         }
 167         // should update layoutchoice even if we don't have a buffer.
 168         owner_->updateLayoutChoice();
 169         owner_->getMiniBuffer()->Init();
 170         owner_->updateWindowTitle();
 171 }
 172
 173
 174 void BufferView::updateScreen()
 175 {
 176         // Regenerate the screen.
 177         delete screen;
 178         screen = new LyXScreen(this,
 179                                workarea->getWin(),
 180                                workarea->getPixmap(),
 181                                workarea->workWidth(),
 182                                workarea->height(),
 183                                workarea->xpos(),
 184                                workarea->ypos(),
 185                                text);
 186 }
 187
 188
 189 void BufferView::resize(int xpos, int ypos, int width, int height)
 190 {
 191         workarea->resize(xpos, ypos, width, height);
 192         update(3);
 193         redraw();
 194 }
 195
 196
 197 void BufferView::resize()
 198 {
 199         // This will resize the buffer. (Asger)
 200         if (buffer_)
 201                 resizeCurrentBuffer();
 202 }
 203
 204
 205 void BufferView::redraw()
 206 {
 207         lyxerr[Debug::INFO] << "BufferView::redraw()" << endl;
 208         workarea->redraw();
 209 }
 210
 211
 212 void BufferView::fitCursor()
 213 {
 214         if (screen) screen->FitCursor();
 215         updateScrollbar();
 216 }
 217
 218
 219 void BufferView::update()
 220 {
 221         if (screen) screen->Update();
 222 }
 223
 224
 225 void BufferView::updateScrollbar()
 226 {
 227         /* If the text is smaller than the working area, the scrollbar
 228          * maximum must be the working area height. No scrolling will
 229          * be possible */
 230
 231         if (!buffer_) {
 232                 workarea->setScrollbar(0, 1.0);
 233                 return;
 234         }
 235
 236         static long max2 = 0;
 237         static long height2 = 0;
 238
 239         long cbth = 0;
 240         long cbsf = 0;
 241
 242         if (text)
 243                 cbth = text->height;
 244         if (screen)
 245                 cbsf = screen->first;
 246
 247         // check if anything has changed.
 248         if (max2 == cbth &&
 249             height2 == workarea->height() &&
 250             current_scrollbar_value == cbsf)
 251                 return; // no
 252         max2 = cbth;
 253         height2 = workarea->height();
 254         current_scrollbar_value = cbsf;
 255
 256         if (cbth <= height2) { // text is smaller than screen
 257                 workarea->setScrollbar(0, 1.0); // right?
 258                 return;
 259         }
 260
 261         long maximum_height = workarea->height() * 3 / 4 + cbth;
 262         long value = cbsf;
 263
 264         // set the scrollbar
 265         double hfloat = workarea->height();
 266         double maxfloat = maximum_height;
 267
 268         float slider_size = 0.0;
 269         int slider_value = value;
 270
 271         workarea->setScrollbarBounds(0, text->height - workarea->height());
 272         double lineh = text->DefaultHeight();
 273         workarea->setScrollbarIncrements(lineh);
 274         if (maxfloat > 0.0) {
 275                 if ((hfloat / maxfloat) * float(height2) < 3)
 276                         slider_size = 3.0/float(height2);
 277                 else
 278                         slider_size = hfloat / maxfloat;
 279         } else
 280                 slider_size = hfloat;
 281
 282         workarea->setScrollbar(slider_value, slider_size / workarea->height());
 283 }
 284
 285
 286 void BufferView::redoCurrentBuffer()
 287 {
 288         lyxerr[Debug::INFO] << "BufferView::redoCurrentBuffer" << endl;
 289         if (buffer_ && text) {
 290                 resize();
 291                 owner_->updateLayoutChoice();
 292         }
 293 }
 294
 295
 296 int BufferView::resizeCurrentBuffer()
 297 {
 298         lyxerr[Debug::INFO] << "resizeCurrentBuffer" << endl;
 299
 300         LyXParagraph * par = 0;
 301         LyXParagraph * selstartpar = 0;
 302         LyXParagraph * selendpar = 0;
 303         int pos = 0;
 304         int selstartpos = 0;
 305         int selendpos = 0;
 306         int selection = 0;
 307         int mark_set = 0;
 308
 309         ProhibitInput();
 310
 311         owner_->getMiniBuffer()->Set(_("Formatting document..."));
 312
 313         if (text) {
 314                 par = text->cursor.par;
 315                 pos = text->cursor.pos;
 316                 selstartpar = text->sel_start_cursor.par;
 317                 selstartpos = text->sel_start_cursor.pos;
 318                 selendpar = text->sel_end_cursor.par;
 319                 selendpos = text->sel_end_cursor.pos;
 320                 selection = text->selection;
 321                 mark_set = text->mark_set;
 322                 delete text;
 323                 text = new LyXText(this, workarea->workWidth(), buffer_);
 324         } else {
 325                 // See if we have a text in TextCache that fits
 326                 // the new buffer_ with the correct width.
 327                 text = textcache.findFit(buffer_, workarea->workWidth());
 328                 if (text) {
 329                         if (lyxerr.debugging()) {
 330                                 lyxerr << "Found a LyXText that fits:\n";
 331                                 textcache.show(lyxerr, text);
 332                         }
 333                         // Set the owner of the newly found text
 334                         text->owner(this);
 335                         if (lyxerr.debugging())
 336                                 textcache.show(lyxerr, "resizeCurrentBuffer");
 337                 } else {
 338                         text = new LyXText(this, workarea->workWidth(), buffer_);
 339                 }
 340         }
 341         updateScreen();
 342
 343         if (par) {
 344                 text->selection = true;
 345                 /* at this point just to avoid the Delete-Empty-Paragraph
 346                  * Mechanism when setting the cursor */
 347                 text->mark_set = mark_set;
 348                 if (selection) {
 349                         text->SetCursor(selstartpar, selstartpos);
 350                         text->sel_cursor = text->cursor;
 351                         text->SetCursor(selendpar, selendpos);
 352                         text->SetSelection();
 353                         text->SetCursor(par, pos);
 354                 } else {
 355                         text->SetCursor(par, pos);
 356                         text->sel_cursor = text->cursor;
 357                         text->selection = false;
 358                 }
 359         }
 360         screen->first = screen->TopCursorVisible(); /* this will scroll the
 361                                                      * screen such that the
 362                                                      * cursor becomes
 363                                                      * visible */
 364         updateScrollbar();
 365         redraw();
 366         owner_->getMiniBuffer()->Init();
 367         SetState();
 368         AllowInput();
 369
 370         // Now if the title form still exist kill it
 371         TimerCB(0, 0);
 372
 373         return 0;
 374 }
 375
 376
 377 void BufferView::gotoError()
 378 {
 379         if (!screen)
 380                 return;
 381
 382         screen->HideCursor();
 383         beforeChange();
 384         update(-2);
 385         LyXCursor tmp;
 386
 387         if (!text->GotoNextError()) {
 388                 if (text->cursor.pos
 389                     || text->cursor.par != text->FirstParagraph()) {
 390                         tmp = text->cursor;
 391                         text->cursor.par = text->FirstParagraph();
 392                         text->cursor.pos = 0;
 393                         if (!text->GotoNextError()) {
 394                                 text->cursor = tmp;
 395                                 owner_->getMiniBuffer()
 396                                         ->Set(_("No more errors"));
 397                                 LyXBell();
 398                         }
 399                 } else {
 400                         owner_->getMiniBuffer()->Set(_("No more errors"));
 401                         LyXBell();
 402                 }
 403         }
 404         update(0);
 405         text->sel_cursor = text->cursor;
 406 }
 407
 408
 409 extern "C" {
 410         void C_BufferView_CursorToggleCB(FL_OBJECT * ob, long buf)
 411         {
 412                 BufferView::CursorToggleCB(ob, buf);
 413         }
 414 }
 415
 416
 417 void BufferView::create_view()
 418 {
 419         FL_OBJECT * obj;
 420
 421         //
 422         // TIMERS
 423         //
 424
 425         // timer_cursor
 426         timer_cursor = obj = fl_add_timer(FL_HIDDEN_TIMER,
 427                                           0, 0, 0, 0, "Timer");
 428         fl_set_object_callback(obj, C_BufferView_CursorToggleCB, 0);
 429         obj->u_vdata = this;
 430 }
 431
 432
 433 // Callback for scrollbar up button
 434 void BufferView::UpCB(long time, int button)
 435 {
 436         if (buffer_ == 0) return;
 437
 438         switch (button) {
 439         case 3:
 440                 ScrollUpOnePage();
 441                 break;
 442         case 2:
 443                 ScrollDownOnePage();
 444                 break;
 445         default:
 446                 ScrollUp(time);
 447                 break;
 448         }
 449 }
 450
 451
 452 static inline
 453 void waitForX()
 454 {
 455         XSync(fl_get_display(), 0);
 456 }
 457
 458
 459 // Callback for scrollbar slider
 460 void BufferView::ScrollCB(double value)
 461 {
 462         extern bool cursor_follows_scrollbar;
 463
 464         if (buffer_ == 0) return;
 465
 466         current_scrollbar_value = long(value);
 467         if (current_scrollbar_value < 0)
 468                 current_scrollbar_value = 0;
 469
 470         if (!screen)
 471                 return;
 472
 473         screen->Draw(current_scrollbar_value);
 474
 475         if (cursor_follows_scrollbar) {
 476                 LyXText * vbt = text;
 477                 int height = vbt->DefaultHeight();
 478
 479                 if (vbt->cursor.y < screen->first + height) {
 480                         vbt->SetCursorFromCoordinates(0,
 481                                                       screen->first +
 482                                                       height);
 483                 } else if (vbt->cursor.y >
 484                            screen->first + workarea->height() - height) {
 485                         vbt->SetCursorFromCoordinates(0,
 486                                                       screen->first +
 487                                                       workarea->height()  -
 488                                                       height);
 489                 }
 490         }
 491         waitForX();
 492 }
 493
 494
 495 // Callback for scrollbar down button
 496 void BufferView::DownCB(long time, int button)
 497 {
 498         if (buffer_ == 0) return;
 499
 500         switch (button) {
 501         case 2:
 502                 ScrollUpOnePage();
 503                 break;
 504         case 3:
 505                 ScrollDownOnePage();
 506                 break;
 507         default:
 508                 ScrollDown(time);
 509                 break;
 510         }
 511 }
 512
 513
 514 int BufferView::ScrollUp(long time)
 515 {
 516         if (buffer_ == 0) return 0;
 517         if (!screen) return 0;
 518
 519         double value = workarea->getScrollbarValue();
 520
 521         if (value == 0) return 0;
 522
 523         float add_value =  (text->DefaultHeight()
 524                             + float(time) * float(time) * 0.125);
 525
 526         if (add_value > workarea->height())
 527                 add_value = float(workarea->height() -
 528                                   text->DefaultHeight());
 529
 530         value -= add_value;
 531
 532         if (value < 0)
 533                 value = 0;
 534
 535         workarea->setScrollbarValue(value);
 536
 537         ScrollCB(value);
 538         return 0;
 539 }
 540
 541
 542 int BufferView::ScrollDown(long time)
 543 {
 544         if (buffer_ == 0) return 0;
 545         if (!screen) return 0;
 546
 547         double value= workarea->getScrollbarValue();
 548         pair<double, double> p = workarea->getScrollbarBounds();
 549         double max = p.second;
 550
 551         if (value == max) return 0;
 552
 553         float add_value =  (text->DefaultHeight()
 554                             + float(time) * float(time) * 0.125);
 555
 556         if (add_value > workarea->height())
 557                 add_value = float(workarea->height() -
 558                                   text->DefaultHeight());
 559
 560         value += add_value;
 561
 562         if (value > max)
 563                 value = max;
 564
 565         workarea->setScrollbarValue(value);
 566
 567         ScrollCB(value);
 568         return 0;
 569 }
 570
 571
 572 void BufferView::ScrollUpOnePage()
 573 {
 574         if (buffer_ == 0) return;
 575         if (!screen) return;
 576
 577         long y = screen->first;
 578
 579         if (!y) return;
 580
 581         Row * row = text->GetRowNearY(y);
 582
 583         y = y - workarea->height() + row->height;
 584
 585         workarea->setScrollbarValue(y);
 586
 587         ScrollCB(y);
 588 }
 589
 590
 591 void BufferView::ScrollDownOnePage()
 592 {
 593         if (buffer_ == 0) return;
 594         if (!screen) return;
 595
 596         long y = screen->first;
 597
 598         if (y > text->height - workarea->height())
 599                 return;
 600
 601         y += workarea->height();
 602         text->GetRowNearY(y);
 603
 604         workarea->setScrollbarValue(y);
 605
 606         ScrollCB(y);
 607 }
 608
 609
 610 void BufferView::WorkAreaMotionNotify(int x, int y, unsigned int state)
 611 {
 612         if (buffer_ == 0 || !screen) return;
 613
 614         // Check for inset locking
 615         if (the_locking_inset) {
 616                 LyXCursor cursor = text->cursor;
 617                 the_locking_inset->
 618                         InsetMotionNotify(x - cursor.x,
 619                                           y - cursor.y,
 620                                           state);
 621                 return;
 622         }
 623
 624         // Only use motion with button 1
 625         if (!state & Button1MotionMask)
 626                 return;
 627
 628         /* The selection possible is needed, that only motion events are
 629          * used, where the bottom press event was on the drawing area too */
 630         if (selection_possible) {
 631                 screen->HideCursor();
 632
 633                 text->SetCursorFromCoordinates(x, y + screen->first);
 634
 635                 if (!text->selection)
 636                         update(-3); // Maybe an empty line was deleted
 637
 638                 text->SetSelection();
 639                 screen->ToggleToggle();
 640                 if (screen->FitCursor())
 641                         updateScrollbar();
 642                 screen->ShowCursor();
 643         }
 644         return;
 645 }
 646
 647
 648 #ifdef USE_PAINTER
 649 extern int bibitemMaxWidth(Painter &, LyXFont const &);
 650 #else
 651 extern int bibitemMaxWidth(LyXFont const &);
 652 #endif
 653
 654 // Single-click on work area
 655 void BufferView::WorkAreaButtonPress(int xpos, int ypos, unsigned int button)
 656 {
 657         last_click_x = -1;
 658         last_click_y = -1;
 659
 660         if (buffer_ == 0 || !screen) return;
 661
 662         Inset * inset_hit = checkInsetHit(xpos, ypos);
 663
 664         // ok ok, this is a hack.
 665         if (button == 4 || button == 5) {
 666                 switch (button) {
 667                 case 4:
 668                         ScrollUp(100); // This number is only temporary
 669                         break;
 670                 case 5:
 671                         ScrollDown(100);
 672                         break;
 673                 }
 674         }
 675
 676         if (the_locking_inset) {
 677                 // We are in inset locking mode
 678
 679                 /* Check whether the inset was hit. If not reset mode,
 680                    otherwise give the event to the inset */
 681                 if (inset_hit) {
 682                         the_locking_inset->
 683                                 InsetButtonPress(xpos, ypos,
 684                                                  button);
 685                         return;
 686                 } else {
 687                         unlockInset(the_locking_inset);
 688                 }
 689         }
 690
 691         selection_possible = true;
 692         screen->HideCursor();
 693
 694         // Right button mouse click on a table
 695         if (button == 3 &&
 696             (text->cursor.par->table ||
 697              text->MouseHitInTable(xpos, ypos + screen->first))) {
 698                 // Set the cursor to the press-position
 699                 text->SetCursorFromCoordinates(xpos, ypos + screen->first);
 700                 bool doit = true;
 701
 702                 // Only show the table popup if the hit is in
 703                 // the table, too
 704                 if (!text->HitInTable(text->cursor.row, xpos))
 705                         doit = false;
 706
 707                 // Hit above or below the table?
 708                 if (doit) {
 709                         if (!text->selection) {
 710                                 screen->ToggleSelection();
 711                                 text->ClearSelection();
 712                                 text->FullRebreak();
 713                                 screen->Update();
 714                                 updateScrollbar();
 715                         }
 716                         // Popup table popup when on a table.
 717                         // This is obviously temporary, since we
 718                         // should be able to popup various
 719                         // context-sensitive-menus with the
 720                         // the right mouse. So this should be done more
 721                         // general in the future. Matthias.
 722                         selection_possible = false;
 723                         owner_->getLyXFunc()
 724                                 ->Dispatch(LFUN_LAYOUT_TABLE,
 725                                            "true");
 726                         return;
 727                 }
 728         }
 729
 730         int screen_first = screen->first;
 731
 732         // Middle button press pastes if we have a selection
 733         bool paste_internally = false;
 734         if (button == 2
 735             && text->selection) {
 736                 owner_->getLyXFunc()->Dispatch(LFUN_COPY);
 737                 paste_internally = true;
 738         }
 739
 740         // Clear the selection
 741         screen->ToggleSelection();
 742         text->ClearSelection();
 743         text->FullRebreak();
 744         screen->Update();
 745         updateScrollbar();
 746
 747         // Single left click in math inset?
 748         if (inset_hit != 0 && inset_hit->Editable() == 2) {
 749                 // Highly editable inset, like math
 750                 selection_possible = false;
 751                 owner_->updateLayoutChoice();
 752                 owner_->getMiniBuffer()->Set(inset_hit->EditMessage());
 753                 inset_hit->Edit(xpos, ypos);
 754                 return;
 755         }
 756
 757         // Right click on a footnote flag opens float menu
 758         if (button == 3) {
 759                 selection_possible = false;
 760                 return;
 761         }
 762
 763         text->SetCursorFromCoordinates(xpos, ypos + screen_first);
 764         text->FinishUndo();
 765         text->sel_cursor = text->cursor;
 766         text->cursor.x_fix = text->cursor.x;
 767
 768         owner_->updateLayoutChoice();
 769         if (screen->FitCursor()){
 770                 updateScrollbar();
 771                 selection_possible = false;
 772         }
 773
 774         // Insert primary selection with middle mouse
 775         // if there is a local selection in the current buffer,
 776         // insert this
 777         if (button == 2) {
 778                 if (paste_internally)
 779                         owner_->getLyXFunc()->Dispatch(LFUN_PASTE);
 780                 else
 781                         owner_->getLyXFunc()->Dispatch(LFUN_PASTESELECTION,
 782                                                        "paragraph");
 783                 selection_possible = false;
 784                 return;
 785         }
 786 }
 787
 788
 789 void BufferView::WorkAreaButtonRelease(int x, int y, unsigned int button)
 790 {
 791         if (buffer_ == 0 || screen == 0) return;
 792
 793         // If we hit an inset, we have the inset coordinates in these
 794         // and inset_hit points to the inset.  If we do not hit an
 795         // inset, inset_hit is 0, and inset_x == x, inset_y == y.
 796         Inset * inset_hit = checkInsetHit(x, y);
 797
 798         if (the_locking_inset) {
 799                 // We are in inset locking mode.
 800
 801                 /* LyX does a kind of work-area grabbing for insets.
 802                    Only a ButtonPress Event outside the inset will
 803                    force a InsetUnlock. */
 804                 the_locking_inset->
 805                         InsetButtonRelease(x, x, button);
 806                 return;
 807         }
 808
 809         selection_possible = false;
 810         if (text->cursor.par->table) {
 811                 int cell = text->
 812                         NumberOfCell(text->cursor.par,
 813                                      text->cursor.pos);
 814                 if (text->cursor.par->table->IsContRow(cell) &&
 815                     text->cursor.par->table->
 816                     CellHasContRow(text->cursor.par->table->
 817                                    GetCellAbove(cell))<0) {
 818                         text->CursorUp();
 819                 }
 820         }
 821
 822         if (button >= 2) return;
 823
 824         SetState();
 825         owner_->getMiniBuffer()->Set(CurrentState());
 826
 827         // Did we hit an editable inset?
 828         if (inset_hit != 0) {
 829                 // Inset like error, notes and figures
 830                 selection_possible = false;
 831 #ifdef WITH_WARNINGS
 832 #warning fix this proper in 0.13
 833 #endif
 834                 // Following a ref shouldn't issue
 835                 // a push on the undo-stack
 836                 // anylonger, now that we have
 837                 // keybindings for following
 838                 // references and returning from
 839                 // references.  IMHO though, it
 840                 // should be the inset's own business
 841                 // to push or not push on the undo
 842                 // stack. They don't *have* to
 843                 // alter the document...
 844                 // (Joacim)
 845                 // ...or maybe the SetCursorParUndo()
 846                 // below isn't necessary at all anylonger?
 847                 if (inset_hit->LyxCode() == Inset::REF_CODE) {
 848                         text->SetCursorParUndo();
 849                 }
 850
 851                 owner_->getMiniBuffer()->Set(inset_hit->EditMessage());
 852                 inset_hit->Edit(x, y);
 853                 return;
 854         }
 855
 856         // check whether we want to open a float
 857         if (text) {
 858                 bool hit = false;
 859                 char c = ' ';
 860                 if (text->cursor.pos <
 861                     text->cursor.par->Last()) {
 862                         c = text->cursor.par->
 863                                 GetChar(text->cursor.pos);
 864                 }
 865                 if (c == LyXParagraph::META_FOOTNOTE
 866                     || c == LyXParagraph::META_MARGIN
 867                     || c == LyXParagraph::META_FIG
 868                     || c == LyXParagraph::META_TAB
 869                     || c == LyXParagraph::META_WIDE_FIG
 870                     || c == LyXParagraph::META_WIDE_TAB
 871                     || c == LyXParagraph::META_ALGORITHM){
 872                         hit = true;
 873                 } else if (text->cursor.pos - 1 >= 0) {
 874                         c = text->cursor.par->
 875                                 GetChar(text->cursor.pos - 1);
 876                         if (c == LyXParagraph::META_FOOTNOTE
 877                             || c == LyXParagraph::META_MARGIN
 878                             || c == LyXParagraph::META_FIG
 879                             || c == LyXParagraph::META_TAB
 880                             || c == LyXParagraph::META_WIDE_FIG
 881                             || c == LyXParagraph::META_WIDE_TAB
 882                             || c == LyXParagraph::META_ALGORITHM){
 883                                 // We are one step too far to the right
 884                                 text->CursorLeft();
 885                                 hit = true;
 886                         }
 887                 }
 888                 if (hit == true) {
 889                         toggleFloat();
 890                         selection_possible = false;
 891                         return;
 892                 }
 893         }
 894
 895         // Do we want to close a float? (click on the float-label)
 896         if (text->cursor.row->par->footnoteflag ==
 897             LyXParagraph::OPEN_FOOTNOTE
 898             //&& text->cursor.pos == 0
 899             && text->cursor.row->previous &&
 900             text->cursor.row->previous->par->
 901             footnoteflag != LyXParagraph::OPEN_FOOTNOTE){
 902                 LyXFont font (LyXFont::ALL_SANE);
 903                 font.setSize(LyXFont::SIZE_FOOTNOTE);
 904
 905                 int box_x = 20; // LYX_PAPER_MARGIN;
 906                 box_x += font.textWidth(" wide-tab ", 10);
 907
 908                 int screen_first = screen->first;
 909
 910                 if (x < box_x
 911                     && y + screen_first > text->cursor.y -
 912                     text->cursor.row->baseline
 913                     && y + screen_first < text->cursor.y -
 914                     text->cursor.row->baseline
 915                     + font.maxAscent() * 1.2 + font.maxDescent() * 1.2) {
 916                         toggleFloat();
 917                         selection_possible = false;
 918                         return;
 919                 }
 920         }
 921
 922         // Maybe we want to edit a bibitem ale970302
 923 #ifdef USE_PAINTER
 924         if (text->cursor.par->bibkey && x < 20 +
 925             bibitemMaxWidth(painter(),
 926                             textclasslist
 927                             .TextClass(buffer_->
 928                                        params.textclass).defaultfont())) {
 929                 text->cursor.par->bibkey->Edit(0, 0);
 930         }
 931 #else
 932         if (text->cursor.par->bibkey && x < 20 +
 933             bibitemMaxWidth(textclasslist
 934                             .TextClass(buffer_->
 935                                        params.textclass).defaultfont())) {
 936                 text->cursor.par->bibkey->Edit(0, 0);
 937         }
 938 #endif
 939
 940         return;
 941 }
 942
 943
 944 /*
 945  * Returns an inset if inset was hit. 0 otherwise.
 946  * If hit, the coordinates are changed relative to the inset.
 947  * Otherwise coordinates are not changed, and false is returned.
 948  */
 949 #ifdef USE_PAINTER
 950 Inset * BufferView::checkInsetHit(int & x, int & y)
 951 {
 952         if (!getScreen())
 953                 return 0;
 954
 955         int y_tmp = y + getScreen()->first;
 956
 957         LyXCursor & cursor = text->cursor;
 958         LyXDirection direction = text->real_current_font.getFontDirection();
 959
 960         if (cursor.pos < cursor.par->Last()
 961             && cursor.par->GetChar(cursor.pos) == LyXParagraph::META_INSET
 962             && cursor.par->GetInset(cursor.pos)
 963             && cursor.par->GetInset(cursor.pos)->Editable()) {
 964
 965                 // Check whether the inset really was hit
 966                 Inset * tmpinset = cursor.par->GetInset(cursor.pos);
 967                 LyXFont font = text->GetFont(cursor.par, cursor.pos);
 968                 int start_x, end_x;
 969                 if (direction == LYX_DIR_LEFT_TO_RIGHT) {
 970                         start_x = cursor.x;
 971                         end_x = cursor.x + tmpinset->width(painter(), font);
 972                 } else {
 973                         start_x = cursor.x - tmpinset->width(painter(), font);
 974                         end_x = cursor.x;
 975                 }
 976
 977                 if (x > start_x && x < end_x
 978                     && y_tmp > cursor.y - tmpinset->ascent(painter(), font)
 979                     && y_tmp < cursor.y + tmpinset->descent(painter(), font)) {
 980                         x = x - start_x;
 981                         // The origin of an inset is on the baseline
 982                         y = y_tmp - (cursor.y);
 983                         return tmpinset;
 984                 }
 985         }
 986
 987         if (cursor.pos - 1 >= 0
 988                    && cursor.par->GetChar(cursor.pos - 1) == LyXParagraph::META_INSET
 989                    && cursor.par->GetInset(cursor.pos - 1)
 990                    && cursor.par->GetInset(cursor.pos - 1)->Editable()) {
 991                 text->CursorLeft();
 992                 Inset * tmpinset = cursor.par->GetInset(cursor.pos);
 993                 LyXFont font = text->GetFont(cursor.par, cursor.pos);
 994                 int start_x, end_x;
 995                 if (direction == LYX_DIR_LEFT_TO_RIGHT) {
 996                         start_x = cursor.x;
 997                         end_x = cursor.x + tmpinset->width(painter(), font);
 998                 } else {
 999                         start_x = cursor.x - tmpinset->width(painter(), font);
1000                         end_x = cursor.x;
1001                 }
1002                 if (x > start_x && x < end_x
1003                     && y_tmp > cursor.y - tmpinset->ascent(painter(), font)
1004                     && y_tmp < cursor.y + tmpinset->descent(painter(), font)) {
1005                         x = x - start_x;
1006                         // The origin of an inset is on the baseline
1007                         y = y_tmp - (cursor.y);
1008                         return tmpinset;
1009                 } else {
1010                         text->CursorRight();
1011                         return 0;
1012                 }
1013         }
1014         return 0;
1015 }
1016 #else
1017 Inset * BufferView::checkInsetHit(int & x, int & y)
1018 {
1019         if (!getScreen())
1020                 return 0;
1021
1022         int y_tmp = y + getScreen()->first;
1023
1024         LyXCursor & cursor = text->cursor;
1025         LyXDirection direction = text->real_current_font.getFontDirection();
1026
1027         if (cursor.pos < cursor.par->Last()
1028             && cursor.par->GetChar(cursor.pos) == LyXParagraph::META_INSET
1029             && cursor.par->GetInset(cursor.pos)
1030             && cursor.par->GetInset(cursor.pos)->Editable()) {
1031
1032                 // Check whether the inset really was hit
1033                 Inset * tmpinset = cursor.par->GetInset(cursor.pos);
1034                 LyXFont font = text->GetFont(cursor.par, cursor.pos);
1035                 int start_x, end_x;
1036                 if (direction == LYX_DIR_LEFT_TO_RIGHT) {
1037                         start_x = cursor.x;
1038                         end_x = cursor.x + tmpinset->Width(font);
1039                 } else {
1040                         start_x = cursor.x - tmpinset->Width(font);
1041                         end_x = cursor.x;
1042                 }
1043
1044                 if (x > start_x && x < end_x
1045                     && y_tmp > cursor.y - tmpinset->Ascent(font)
1046                     && y_tmp < cursor.y + tmpinset->Descent(font)) {
1047                         x = x - start_x;
1048                         // The origin of an inset is on the baseline
1049                         y = y_tmp - (cursor.y);
1050                         return tmpinset;
1051                 }
1052         }
1053
1054         if (cursor.pos - 1 >= 0
1055                    && cursor.par->GetChar(cursor.pos - 1) == LyXParagraph::META_INSET
1056                    && cursor.par->GetInset(cursor.pos - 1)
1057                    && cursor.par->GetInset(cursor.pos - 1)->Editable()) {
1058                 text->CursorLeft();
1059                 Inset * tmpinset = cursor.par->GetInset(cursor.pos);
1060                 LyXFont font = text->GetFont(cursor.par, cursor.pos);
1061                 int start_x, end_x;
1062                 if (direction == LYX_DIR_LEFT_TO_RIGHT) {
1063                         start_x = cursor.x;
1064                         end_x = cursor.x + tmpinset->Width(font);
1065                 } else {
1066                         start_x = cursor.x - tmpinset->Width(font);
1067                         end_x = cursor.x;
1068                 }
1069                 if (x > start_x && x < end_x
1070                     && y_tmp > cursor.y - tmpinset->Ascent(font)
1071                     && y_tmp < cursor.y + tmpinset->Descent(font)) {
1072                         x = x - start_x;
1073                         // The origin of an inset is on the baseline
1074                         y = y_tmp - (cursor.y);
1075                         return tmpinset;
1076                 } else {
1077                         text->CursorRight();
1078                         return 0;
1079                 }
1080         }
1081         return 0;
1082 }
1083 #endif
1084
1085
1086 void BufferView::workAreaExpose()
1087 {
1088         // this is a hack to ensure that we only call this through
1089         // BufferView::redraw().
1090         //if (!lgb_hack) {
1091         //      redraw();
1092         //}
1093
1094         static int work_area_width = -1;
1095         static int work_area_height = -1;
1096
1097         bool widthChange = workarea->workWidth() != work_area_width;
1098         bool heightChange = workarea->height() != work_area_height;
1099
1100         // update from work area
1101         work_area_width = workarea->workWidth();
1102         work_area_height = workarea->height();
1103         if (buffer_ != 0) {
1104                 if (widthChange) {
1105                         // All buffers need a resize
1106                         bufferlist.resize();
1107
1108                         // Remove all texts from the textcache
1109                         // This is not _really_ what we want to do. What
1110                         // we really want to do is to delete in textcache
1111                         // that does not have a BufferView with matching
1112                         // width, but as long as we have only one BufferView
1113                         // deleting all gives the same result.
1114                         if (lyxerr.debugging())
1115                                 textcache.show(lyxerr, "Expose delete all");
1116                         textcache.clear();
1117                 } else if (heightChange) {
1118                         // Rebuild image of current screen
1119                         updateScreen();
1120                         // fitCursor() ensures we don't jump back
1121                         // to the start of the document on vertical
1122                         // resize
1123                         fitCursor();
1124
1125                         // The main window size has changed, repaint most stuff
1126                         redraw();
1127                         // ...including the minibuffer
1128                         owner_->getMiniBuffer()->Init();
1129
1130                 } else if (screen) screen->Redraw();
1131         } else {
1132                 // Grey box when we don't have a buffer
1133                 workarea->greyOut();
1134         }
1135
1136         // always make sure that the scrollbar is sane.
1137         updateScrollbar();
1138         owner_->updateLayoutChoice();
1139         return;
1140 }
1141
1142
1143 // Callback for cursor timer
1144 void BufferView::CursorToggleCB(FL_OBJECT * ob, long)
1145 {
1146         BufferView * view = static_cast<BufferView*>(ob->u_vdata);
1147
1148         // Quite a nice place for asyncron Inset updating, isn't it?
1149         // Actually no! This is run even if no buffer exist... so (Lgb)
1150         if (view && !view->buffer_) {
1151                 goto set_timer_and_return;
1152         }
1153
1154         // NOTE:
1155         // On my quest to solve the gs render hangups I am now
1156         // disabling the SIGHUP completely, and will do a wait
1157         // now and then instead. If the guess that xforms somehow
1158         // destroys something is true, this is likely (hopefully)
1159         // to solve the problem...at least I hope so. Lgb
1160
1161         // ...Ok this seems to work...at least it does not make things
1162         // worse so far. However I still see gs processes that hangs.
1163         // I would really like to know _why_ they are hanging. Anyway
1164         // the solution without the SIGCHLD handler seems to be easier
1165         // to debug.
1166
1167         // When attaching gdb to a a running gs that hangs it shows
1168         // that it is waiting for input(?) Is it possible for us to
1169         // provide that input somehow? Or figure what it is expecing
1170         // to read?
1171
1172         // One solution is to, after some time, look if there are some
1173         // old gs processes still running and if there are: kill them
1174         // and re render.
1175
1176         // Another solution is to provide the user an option to rerender
1177         // a picture. This would, for the picture in question, check if
1178         // there is a gs running for it, if so kill it, and start a new
1179         // rendering process.
1180
1181         // these comments posted to lyx@via
1182         {
1183                 int status = 1;
1184                 int pid = waitpid(static_cast<pid_t>(0), &status, WNOHANG);
1185                 if (pid == -1) // error find out what is wrong
1186                         ; // ignore it for now.
1187                 else if (pid > 0)
1188                         sigchldhandler(pid, &status);
1189         }
1190         if (InsetUpdateList)
1191                 UpdateInsetUpdateList();
1192
1193         if (view && !view->screen){
1194                 goto set_timer_and_return;
1195         }
1196
1197         if (view->lyx_focus && view->work_area_focus) {
1198                 if (!view->the_locking_inset) {
1199                         view->screen->CursorToggle();
1200                 } else {
1201                         view->the_locking_inset->
1202                                 ToggleInsetCursor();
1203                 }
1204                 goto set_timer_and_return;
1205         } else {
1206                 // Make sure that the cursor is visible.
1207                 if (!view->the_locking_inset) {
1208                         view->screen->ShowCursor();
1209                 } else {
1210                         if (!view->the_locking_inset->isCursorVisible())
1211                                 view->the_locking_inset->
1212                                         ToggleInsetCursor();
1213                 }
1214                 // This is only run when work_area_focus or lyx_focus is false.
1215                 Window tmpwin;
1216                 int tmp;
1217                 XGetInputFocus(fl_display, &tmpwin, &tmp);
1218                 // Commenting this out, we have not had problems with this
1219                 // for a long time. We will probably work on this code later
1220                 // and we can reenable this debug code then. Now it only
1221                 // anoying when debugging. (Lgb)
1222                 //if (lyxerr.debugging(Debug::INFO)) {
1223                 //      lyxerr << "tmpwin: " << tmpwin
1224                 //             << "\nwindow: " << view->owner_->getForm()->window
1225                 //             << "\nwork_area_focus: " << view->work_area_focus
1226                 //             << "\nlyx_focus      : " << view->lyx_focus
1227                 //             << endl;
1228                 //}
1229                 if (tmpwin != view->owner_->getForm()->window) {
1230                         view->lyx_focus = false;
1231                         goto skip_timer;
1232                 } else {
1233                         view->lyx_focus = true;
1234                         if (!view->work_area_focus)
1235                                 goto skip_timer;
1236                         else
1237                                 goto set_timer_and_return;
1238                 }
1239         }
1240
1241   set_timer_and_return:
1242         fl_set_timer(ob, 0.4);
1243   skip_timer:
1244         return;
1245 }
1246
1247
1248 static
1249 string fromClipboard(Window win, XEvent * event)
1250 {
1251         string strret;
1252         if (event->xselection.type == XA_STRING
1253             && event->xselection.property) {
1254                 Atom tmpatom;
1255                 unsigned long ul1;
1256                 unsigned long ul2;
1257                 unsigned char * uc = 0;
1258                 int tmpint;
1259                 if (XGetWindowProperty(
1260                         event->xselection.display,  // display
1261                         win,                        // w
1262                         event->xselection.property, // property
1263                         0,                          // long_offset
1264                         0,                          // logn_length
1265                         False,                      // delete
1266                         XA_STRING,                  // req_type
1267                         &tmpatom,                   // actual_type_return
1268                         &tmpint,                    // actual_format_return
1269                         &ul1,
1270                         &ul2,
1271                         &uc                         // prop_return
1272                         ) != Success) {
1273                         return strret;
1274                 }
1275                 if (uc) {
1276                         free(uc);
1277                         uc = 0;
1278                 }
1279                 if (XGetWindowProperty(
1280                         event->xselection.display,             // display
1281                         win,                        // w
1282                         event->xselection.property, // property
1283                         0,                          // long_offset
1284                         ul2/4+1,                    // long_length
1285                         True,                       // delete
1286                         XA_STRING,                  // req_type
1287                         &tmpatom,                   // actual_type_return
1288                         &tmpint,                    // actual_format_return
1289                         &ul1,                       // nitems_return
1290                         &ul2,                       // bytes_after_return
1291                         &uc                         // prop_return */
1292                         ) != Success) {
1293                         return strret;
1294                 }
1295                 if (uc) {
1296                         strret = reinterpret_cast<char*>(uc);
1297                         free(uc); // yes free!
1298                         uc = 0;
1299                 }
1300         }
1301         return strret;
1302 }
1303
1304
1305 void BufferView::WorkAreaSelectionNotify(Window win, XEvent * event)
1306 {
1307         if (buffer_ == 0) return;
1308
1309         screen->HideCursor();
1310         beforeChange();
1311         string clb = fromClipboard(win, event);
1312         if (!clb.empty()) {
1313                 if (!ascii_type)
1314                         text->InsertStringA(clb.c_str());
1315                 else
1316                         text->InsertStringB(clb.c_str());
1317
1318                 update(1);
1319
1320         }
1321 }
1322
1323
1324 void BufferView::cursorPrevious()
1325 {
1326         if (!text->cursor.row->previous) return;
1327
1328         long y = getScreen()->first;
1329         Row * cursorrow = text->cursor.row;
1330         text->SetCursorFromCoordinates(text->cursor.x_fix, y);
1331         text->FinishUndo();
1332         // This is to allow jumping over large insets
1333         if ((cursorrow == text->cursor.row))
1334                 text->CursorUp();
1335
1336         if (text->cursor.row->height < workarea->height())
1337                 getScreen()->Draw(text->cursor.y
1338                                   - text->cursor.row->baseline
1339                                   + text->cursor.row->height
1340                                   - workarea->height() + 1 );
1341 }
1342
1343
1344 void BufferView::cursorNext()
1345 {
1346         if (!text->cursor.row->next) return;
1347
1348         long y = getScreen()->first;
1349         text->GetRowNearY(y);
1350         Row * cursorrow = text->cursor.row;
1351         text->SetCursorFromCoordinates(text->cursor.x_fix, y
1352                                        + workarea->height());
1353         text->FinishUndo();
1354         // This is to allow jumping over large insets
1355         if ((cursorrow == text->cursor.row))
1356                 text->CursorDown();
1357
1358         if (text->cursor.row->height < workarea->height())
1359                 getScreen()->Draw(text->cursor.y
1360                                   - text->cursor.row->baseline);
1361 }
1362
1363
1364 bool BufferView::available() const
1365 {
1366         if (buffer_ && text) return true;
1367         return false;
1368 }
1369
1370
1371 void BufferView::beforeChange()
1372 {
1373         getScreen()->ToggleSelection();
1374         text->ClearSelection();
1375         FreeUpdateTimer();
1376 }
1377
1378
1379 void BufferView::savePosition()
1380 {
1381         backstack.push(buffer()->fileName(),
1382                        text->cursor.x,
1383                        text->cursor.y);
1384 }
1385
1386
1387 void BufferView::restorePosition()
1388 {
1389         if (backstack.empty()) return;
1390
1391         int  x, y;
1392         string fname = backstack.pop(&x, &y);
1393
1394         beforeChange();
1395         Buffer * b = bufferlist.exists(fname) ?
1396                 bufferlist.getBuffer(fname) :
1397                 bufferlist.loadLyXFile(fname); // don't ask, just load it
1398         buffer(b);
1399         text->SetCursorFromCoordinates(x, y);
1400         update(0);
1401 }
1402
1403
1404 void BufferView::update(signed char f)
1405 {
1406         owner()->updateLayoutChoice();
1407
1408         if (!text->selection && f > -3)
1409                 text->sel_cursor = text->cursor;
1410
1411         FreeUpdateTimer();
1412         text->FullRebreak();
1413
1414         update();
1415
1416         if (f != 3 && f != -3) {
1417                 fitCursor();
1418                 updateScrollbar();
1419         }
1420
1421         if (f == 1 || f == -1) {
1422                 if (buffer()->isLyxClean()) {
1423                         buffer()->markDirty();
1424                         owner()->getMiniBuffer()->setTimer(4);
1425                 } else {
1426                         buffer()->markDirty();
1427                 }
1428         }
1429 }
1430
1431
1432 void BufferView::smallUpdate(signed char f)
1433 {
1434         getScreen()->SmallUpdate();
1435         if (getScreen()->TopCursorVisible()
1436             != getScreen()->first) {
1437                 update(f);
1438                 return;
1439         }
1440
1441         fitCursor();
1442         updateScrollbar();
1443
1444         if (!text->selection)
1445                 text->sel_cursor = text->cursor;
1446
1447         if (f == 1 || f == -1) {
1448                 if (buffer()->isLyxClean()) {
1449                         buffer()->markDirty();
1450                         owner()->getMiniBuffer()->setTimer(4);
1451                 } else {
1452                         buffer()->markDirty();
1453                 }
1454         }
1455 }
1456
1457
1458 void BufferView::SetState()
1459 {
1460         if (!lyxrc->rtl_support)
1461                 return;
1462
1463         if (text->real_current_font.getFontDirection()
1464             == LYX_DIR_LEFT_TO_RIGHT) {
1465                 if (!owner_->getIntl()->primarykeymap)
1466                         owner_->getIntl()->KeyMapPrim();
1467         } else {
1468                 if (owner_->getIntl()->primarykeymap)
1469                         owner_->getIntl()->KeyMapSec();
1470         }
1471 }
1472
1473
1474 void BufferView::insetSleep()
1475 {
1476         if (the_locking_inset && !inset_slept) {
1477                 the_locking_inset->GetCursorPos(slx, sly);
1478                 the_locking_inset->InsetUnlock();
1479                 inset_slept = true;
1480         }
1481 }
1482
1483
1484 void BufferView::insetWakeup()
1485 {
1486         if (the_locking_inset && inset_slept) {
1487                 the_locking_inset->Edit(slx, sly);
1488                 inset_slept = false;
1489         }
1490 }
1491
1492
1493 void BufferView::insetUnlock()
1494 {
1495         if (the_locking_inset) {
1496                 if (!inset_slept) the_locking_inset->InsetUnlock();
1497                 the_locking_inset = 0;
1498                 text->FinishUndo();
1499                 inset_slept = false;
1500         }
1501 }
1502
1503
1504 bool BufferView::focus() const
1505 {
1506         return workarea->hasFocus();
1507 }
1508
1509
1510 void BufferView::focus(bool f)
1511 {
1512         if (f) workarea->setFocus();
1513 }
1514
1515
1516 bool BufferView::active() const
1517 {
1518         return workarea->active();
1519 }