src/BufferView_pimpl.C

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