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