src/frontends/qt4/GuiWorkArea.cpp

   1 /**
   2  * \file GuiWorkArea.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author John Levon
   7  * \author Abdelrazak Younes
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #include <config.h>
  13
  14 #include "GuiWorkArea.h"
  15
  16 #include "ColorCache.h"
  17 #include "FontLoader.h"
  18 #include "Menus.h"
  19
  20 #include "Buffer.h"
  21 #include "BufferList.h"
  22 #include "BufferParams.h"
  23 #include "BufferView.h"
  24 #include "CoordCache.h"
  25 #include "Cursor.h"
  26 #include "Font.h"
  27 #include "FuncRequest.h"
  28 #include "GuiApplication.h"
  29 #include "GuiCompleter.h"
  30 #include "GuiKeySymbol.h"
  31 #include "GuiPainter.h"
  32 #include "GuiView.h"
  33 #include "KeySymbol.h"
  34 #include "Language.h"
  35 #include "LyX.h"
  36 #include "LyXRC.h"
  37 #include "LyXVC.h"
  38 #include "qt_helpers.h"
  39 #include "Text.h"
  40 #include "TextMetrics.h"
  41 #include "version.h"
  42
  43 #include "graphics/GraphicsImage.h"
  44 #include "graphics/GraphicsLoader.h"
  45
  46 #include "support/convert.h"
  47 #include "support/debug.h"
  48 #include "support/gettext.h"
  49 #include "support/FileName.h"
  50
  51 #include "frontends/Application.h"
  52 #include "frontends/FontMetrics.h"
  53 #include "frontends/WorkAreaManager.h"
  54
  55 #include <QContextMenuEvent>
  56 #include <QInputContext>
  57 #include <QHelpEvent>
  58 #ifdef Q_WS_MACX
  59 #include <QMacStyle>
  60 #endif
  61 #include <QMainWindow>
  62 #include <QMenu>
  63 #include <QPainter>
  64 #include <QPalette>
  65 #include <QPixmapCache>
  66 #include <QScrollBar>
  67 #include <QTimer>
  68 #include <QToolButton>
  69 #include <QToolTip>
  70 #include <QMenuBar>
  71
  72 #include "support/bind.h"
  73
  74 #include <cmath>
  75
  76 int const TabIndicatorWidth = 3;
  77
  78 #undef KeyPress
  79 #undef NoModifier
  80
  81 using namespace std;
  82 using namespace lyx::support;
  83
  84 namespace lyx {
  85
  86
  87 /// return the LyX mouse button state from Qt's
  88 static mouse_button::state q_button_state(Qt::MouseButton button)
  89 {
  90         mouse_button::state b = mouse_button::none;
  91         switch (button) {
  92                 case Qt::LeftButton:
  93                         b = mouse_button::button1;
  94                         break;
  95                 case Qt::MidButton:
  96                         b = mouse_button::button2;
  97                         break;
  98                 case Qt::RightButton:
  99                         b = mouse_button::button3;
 100                         break;
 101                 default:
 102                         break;
 103         }
 104         return b;
 105 }
 106
 107
 108 /// return the LyX mouse button state from Qt's
 109 mouse_button::state q_motion_state(Qt::MouseButtons state)
 110 {
 111         mouse_button::state b = mouse_button::none;
 112         if (state & Qt::LeftButton)
 113                 b |= mouse_button::button1;
 114         if (state & Qt::MidButton)
 115                 b |= mouse_button::button2;
 116         if (state & Qt::RightButton)
 117                 b |= mouse_button::button3;
 118         return b;
 119 }
 120
 121
 122 namespace frontend {
 123
 124 class CursorWidget {
 125 public:
 126         CursorWidget() {
 127                 recomputeWidth();
 128         }
 129
 130         void draw(QPainter & painter)
 131         {
 132                 if (!show_ || !rect_.isValid())
 133                         return;
 134
 135                 int y = rect_.top();
 136                 int l = x_ - rect_.left();
 137                 int r = rect_.right() - x_;
 138                 int bot = rect_.bottom();
 139
 140                 // draw vertical line
 141                 painter.fillRect(x_, y, cursor_width_, rect_.height(), color_);
 142
 143                 // draw RTL/LTR indication
 144                 painter.setPen(color_);
 145                 if (l_shape_) {
 146                         if (rtl_)
 147                                 painter.drawLine(x_, bot, x_ - l, bot);
 148                         else
 149                                 painter.drawLine(x_, bot, x_ + cursor_width_ + r, bot);
 150                 }
 151
 152                 // draw completion triangle
 153                 if (completable_) {
 154                         int m = y + rect_.height() / 2;
 155                         int d = TabIndicatorWidth - 1;
 156                         if (rtl_) {
 157                                 painter.drawLine(x_ - 1, m - d, x_ - 1 - d, m);
 158                                 painter.drawLine(x_ - 1, m + d, x_ - 1 - d, m);
 159                         } else {
 160                                 painter.drawLine(x_ + cursor_width_, m - d, x_ + cursor_width_ + d, m);
 161                                 painter.drawLine(x_ + cursor_width_, m + d, x_ + cursor_width_ + d, m);
 162                         }
 163                 }
 164         }
 165
 166         void update(int x, int y, int h, bool l_shape,
 167                 bool rtl, bool completable)
 168         {
 169                 color_ = guiApp->colorCache().get(Color_cursor);
 170                 l_shape_ = l_shape;
 171                 rtl_ = rtl;
 172                 completable_ = completable;
 173                 x_ = x;
 174
 175                 // extension to left and right
 176                 int l = 0;
 177                 int r = 0;
 178
 179                 // RTL/LTR indication
 180                 if (l_shape_) {
 181                         if (rtl)
 182                                 l += h / 3;
 183                         else
 184                                 r += h / 3;
 185                 }
 186
 187                 // completion triangle
 188                 if (completable_) {
 189                         if (rtl)
 190                                 l = max(l, TabIndicatorWidth);
 191                         else
 192                                 r = max(r, TabIndicatorWidth);
 193                 }
 194
 195                 // compute overall rectangle
 196                 rect_ = QRect(x - l, y, cursor_width_ + r + l, h);
 197         }
 198
 199         void show(bool set_show = true) { show_ = set_show; }
 200         void hide() { show_ = false; }
 201         int cursorWidth() const { return cursor_width_; }
 202         void recomputeWidth() {
 203                 cursor_width_ = lyxrc.cursor_width
 204                         ? lyxrc.cursor_width
 205                         : 1 + int((lyxrc.zoom + 50) / 200.0);
 206         }
 207
 208         QRect const & rect() { return rect_; }
 209
 210 private:
 211         /// cursor is in RTL or LTR text
 212         bool rtl_;
 213         /// indication for RTL or LTR
 214         bool l_shape_;
 215         /// triangle to show that a completion is available
 216         bool completable_;
 217         ///
 218         bool show_;
 219         ///
 220         QColor color_;
 221         /// rectangle, possibly with l_shape and completion triangle
 222         QRect rect_;
 223         /// x position (were the vertical line is drawn)
 224         int x_;
 225
 226         int cursor_width_;
 227 };
 228
 229
 230 // This is a 'heartbeat' generating synthetic mouse move events when the
 231 // cursor is at the top or bottom edge of the viewport. One scroll per 0.2 s
 232 SyntheticMouseEvent::SyntheticMouseEvent()
 233         : timeout(200), restart_timeout(true)
 234 {}
 235
 236
 237 GuiWorkArea::GuiWorkArea(QWidget *)
 238         : buffer_view_(0), lyx_view_(0),
 239         cursor_visible_(false),
 240         need_resize_(false), schedule_redraw_(false),
 241         preedit_lines_(1), completer_(new GuiCompleter(this, this))
 242 {
 243 }
 244
 245
 246 GuiWorkArea::GuiWorkArea(Buffer & buffer, GuiView & gv)
 247         : buffer_view_(0), read_only_(buffer.isReadonly()), lyx_view_(0),
 248         cursor_visible_(false),
 249         need_resize_(false), schedule_redraw_(false),
 250         preedit_lines_(1), completer_(new GuiCompleter(this, this))
 251 {
 252         setGuiView(gv);
 253         setBuffer(buffer);
 254         init();
 255 }
 256
 257
 258 void GuiWorkArea::init()
 259 {
 260         // Setup the signals
 261         connect(&cursor_timeout_, SIGNAL(timeout()),
 262                 this, SLOT(toggleCursor()));
 263
 264         int const time = QApplication::cursorFlashTime() / 2;
 265         if (time > 0) {
 266                 cursor_timeout_.setInterval(time);
 267                 cursor_timeout_.start();
 268         } else {
 269                 // let's initialize this just to be safe
 270                 cursor_timeout_.setInterval(500);
 271         }
 272
 273         screen_ = QPixmap(viewport()->width(), viewport()->height());
 274         // With Qt4.5 a mouse event will happen before the first paint event
 275         // so make sure that the buffer view has an up to date metrics.
 276         buffer_view_->resize(viewport()->width(), viewport()->height());
 277         cursor_ = new frontend::CursorWidget();
 278         cursor_->hide();
 279
 280         setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 281         setAcceptDrops(true);
 282         setMouseTracking(true);
 283         setMinimumSize(100, 70);
 284         setFrameStyle(QFrame::NoFrame);
 285         updateWindowTitle();
 286
 287         viewport()->setAutoFillBackground(false);
 288         // We don't need double-buffering nor SystemBackground on
 289         // the viewport because we have our own backing pixmap.
 290         viewport()->setAttribute(Qt::WA_NoSystemBackground);
 291
 292         setFocusPolicy(Qt::StrongFocus);
 293
 294         setCursorShape(Qt::IBeamCursor);
 295
 296         synthetic_mouse_event_.timeout.timeout.connect(
 297                 bind(&GuiWorkArea::generateSyntheticMouseEvent,
 298                                         this));
 299
 300         // Initialize the vertical Scroll Bar
 301         QObject::connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
 302                 this, SLOT(scrollTo(int)));
 303
 304         LYXERR(Debug::GUI, "viewport width: " << viewport()->width()
 305                 << "  viewport height: " << viewport()->height());
 306
 307         // Enables input methods for asian languages.
 308         // Must be set when creating custom text editing widgets.
 309         setAttribute(Qt::WA_InputMethodEnabled, true);
 310
 311         dialog_mode_ = false;
 312 }
 313
 314
 315 GuiWorkArea::~GuiWorkArea()
 316 {
 317         buffer_view_->buffer().workAreaManager().remove(this);
 318         delete buffer_view_;
 319         delete cursor_;
 320         // Completer has a QObject parent and is thus automatically destroyed.
 321         // See #4758.
 322         // delete completer_;
 323 }
 324
 325
 326 Qt::CursorShape GuiWorkArea::cursorShape() const
 327 {
 328         return viewport()->cursor().shape();
 329 }
 330
 331
 332 void GuiWorkArea::setCursorShape(Qt::CursorShape shape)
 333 {
 334         viewport()->setCursor(shape);
 335 }
 336
 337
 338 void GuiWorkArea::updateCursorShape()
 339 {
 340         setCursorShape(buffer_view_->clickableInset()
 341                 ? Qt::PointingHandCursor : Qt::IBeamCursor);
 342 }
 343
 344
 345 void GuiWorkArea::setGuiView(GuiView & gv)
 346 {
 347         lyx_view_ = &gv;
 348 }
 349
 350
 351 void GuiWorkArea::setBuffer(Buffer & buffer)
 352 {
 353         delete buffer_view_;
 354         buffer_view_ = new BufferView(buffer);
 355         buffer.workAreaManager().add(this);
 356
 357         // HACK: Prevents an additional redraw when the scrollbar pops up
 358         // which regularily happens on documents with more than one page.
 359         // The policy  should be set to "Qt::ScrollBarAsNeeded" soon.
 360         // Since we have no geometry information yet, we assume that
 361         // a document needs a scrollbar if there is more then four
 362         // paragraph in the outermost text.
 363         if (buffer.text().paragraphs().size() > 4)
 364                 setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
 365         QTimer::singleShot(50, this, SLOT(fixVerticalScrollBar()));
 366 }
 367
 368
 369 void GuiWorkArea::fixVerticalScrollBar()
 370 {
 371         if (!isFullScreen())
 372                 setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
 373 }
 374
 375
 376 void GuiWorkArea::close()
 377 {
 378         lyx_view_->removeWorkArea(this);
 379 }
 380
 381
 382 void GuiWorkArea::setFullScreen(bool full_screen)
 383 {
 384         buffer_view_->setFullScreen(full_screen);
 385         setFrameStyle(QFrame::NoFrame);
 386         if (full_screen) {
 387                 setFrameStyle(QFrame::NoFrame);
 388                 if (lyxrc.full_screen_scrollbar)
 389                         setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 390         } else
 391                 setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
 392 }
 393
 394
 395 BufferView & GuiWorkArea::bufferView()
 396 {
 397         return *buffer_view_;
 398 }
 399
 400
 401 BufferView const & GuiWorkArea::bufferView() const
 402 {
 403         return *buffer_view_;
 404 }
 405
 406
 407 void GuiWorkArea::stopBlinkingCursor()
 408 {
 409         cursor_timeout_.stop();
 410         hideCursor();
 411 }
 412
 413
 414 void GuiWorkArea::startBlinkingCursor()
 415 {
 416         // do not show the cursor if the view is busy
 417         if (view().busy())
 418                 return;
 419
 420         Point p;
 421         int h = 0;
 422         buffer_view_->cursorPosAndHeight(p, h);
 423         // Don't start blinking if the cursor isn't on screen.
 424         if (!buffer_view_->cursorInView(p, h))
 425                 return;
 426
 427         showCursor();
 428
 429         //we're not supposed to cache this value.
 430         int const time = QApplication::cursorFlashTime() / 2;
 431         if (time <= 0)
 432                 return;
 433         cursor_timeout_.setInterval(time);
 434         cursor_timeout_.start();
 435 }
 436
 437
 438 void GuiWorkArea::redraw(bool update_metrics)
 439 {
 440         if (!isVisible())
 441                 // No need to redraw in this case.
 442                 return;
 443
 444         // No need to do anything if this is the current view. The BufferView
 445         // metrics are already up to date.
 446         if (update_metrics || lyx_view_ != guiApp->currentView()
 447                 || lyx_view_->currentWorkArea() != this) {
 448                 // FIXME: it would be nice to optimize for the off-screen case.
 449                 buffer_view_->cursor().fixIfBroken();
 450                 buffer_view_->updateMetrics();
 451                 buffer_view_->cursor().fixIfBroken();
 452         }
 453
 454         // update cursor position, because otherwise it has to wait until
 455         // the blinking interval is over
 456         if (cursor_visible_) {
 457                 hideCursor();
 458                 showCursor();
 459         }
 460
 461         LYXERR(Debug::WORKAREA, "WorkArea::redraw screen");
 462         updateScreen();
 463         update(0, 0, viewport()->width(), viewport()->height());
 464
 465         /// \warning: scrollbar updating *must* be done after the BufferView is drawn
 466         /// because \c BufferView::updateScrollbar() is called in \c BufferView::draw().
 467         updateScrollbar();
 468         lyx_view_->updateStatusBar();
 469
 470         if (lyxerr.debugging(Debug::WORKAREA))
 471                 buffer_view_->coordCache().dump();
 472
 473         setReadOnly(buffer_view_->buffer().isReadonly());
 474
 475         updateCursorShape();
 476 }
 477
 478
 479 void GuiWorkArea::processKeySym(KeySymbol const & key, KeyModifier mod)
 480 {
 481         if (lyx_view_->isFullScreen() && lyx_view_->menuBar()->isVisible()
 482                 && lyxrc.full_screen_menubar) {
 483                 // FIXME HACK: we should not have to do this here. See related comment
 484                 // in GuiView::event() (QEvent::ShortcutOverride)
 485                 lyx_view_->menuBar()->hide();
 486         }
 487
 488         // In order to avoid bad surprise in the middle of an operation,
 489         // we better stop the blinking cursor...
 490         // the cursor gets restarted in GuiView::restartCursor()
 491         stopBlinkingCursor();
 492         guiApp->processKeySym(key, mod);
 493 }
 494
 495
 496 void GuiWorkArea::dispatch(FuncRequest const & cmd0, KeyModifier mod)
 497 {
 498         // Handle drag&drop
 499         if (cmd0.action() == LFUN_FILE_OPEN) {
 500                 DispatchResult dr;
 501                 lyx_view_->dispatch(cmd0, dr);
 502                 return;
 503         }
 504
 505         FuncRequest cmd;
 506
 507         if (cmd0.action() == LFUN_MOUSE_PRESS) {
 508                 if (mod == ShiftModifier)
 509                         cmd = FuncRequest(cmd0, "region-select");
 510                 else if (mod == ControlModifier)
 511                         cmd = FuncRequest(cmd0, "paragraph-select");
 512                 else
 513                         cmd = cmd0;
 514         }
 515         else
 516                 cmd = cmd0;
 517
 518         bool const notJustMovingTheMouse =
 519                 cmd.action() != LFUN_MOUSE_MOTION || cmd.button() != mouse_button::none;
 520
 521         // In order to avoid bad surprise in the middle of an operation, we better stop
 522         // the blinking cursor.
 523         if (notJustMovingTheMouse)
 524                 stopBlinkingCursor();
 525
 526         buffer_view_->mouseEventDispatch(cmd);
 527
 528         // Skip these when selecting
 529         if (cmd.action() != LFUN_MOUSE_MOTION) {
 530                 completer_->updateVisibility(false, false);
 531                 lyx_view_->updateDialogs();
 532                 lyx_view_->updateStatusBar();
 533         }
 534
 535         // GUI tweaks except with mouse motion with no button pressed.
 536         if (notJustMovingTheMouse) {
 537                 // Slight hack: this is only called currently when we
 538                 // clicked somewhere, so we force through the display
 539                 // of the new status here.
 540                 lyx_view_->clearMessage();
 541
 542                 // Show the cursor immediately after any operation
 543                 startBlinkingCursor();
 544         }
 545
 546         updateCursorShape();
 547 }
 548
 549
 550 void GuiWorkArea::resizeBufferView()
 551 {
 552         // WARNING: Please don't put any code that will trigger a repaint here!
 553         // We are already inside a paint event.
 554         lyx_view_->setBusy(true);
 555         Point p;
 556         int h = 0;
 557         buffer_view_->cursorPosAndHeight(p, h);
 558         bool const cursor_in_view = buffer_view_->cursorInView(p, h);
 559         buffer_view_->resize(viewport()->width(), viewport()->height());
 560         if (cursor_in_view)
 561                 buffer_view_->scrollToCursor();
 562         updateScreen();
 563
 564         // Update scrollbars which might have changed due different
 565         // BufferView dimension. This is especially important when the
 566         // BufferView goes from zero-size to the real-size for the first time,
 567         // as the scrollbar paramters are then set for the first time.
 568         updateScrollbar();
 569
 570         lyx_view_->updateLayoutList();
 571         lyx_view_->setBusy(false);
 572         need_resize_ = false;
 573 }
 574
 575
 576 void GuiWorkArea::showCursor()
 577 {
 578         if (cursor_visible_)
 579                 return;
 580
 581         Point p;
 582         int h = 0;
 583         buffer_view_->cursorPosAndHeight(p, h);
 584         if (!buffer_view_->cursorInView(p, h))
 585                 return;
 586
 587         // RTL or not RTL
 588         bool l_shape = false;
 589         Font const & realfont = buffer_view_->cursor().real_current_font;
 590         BufferParams const & bp = buffer_view_->buffer().params();
 591         bool const samelang = realfont.language() == bp.language;
 592         bool const isrtl = realfont.isVisibleRightToLeft();
 593
 594         if (!samelang || isrtl != bp.language->rightToLeft())
 595                 l_shape = true;
 596
 597         // The ERT language hack needs fixing up
 598         if (realfont.language() == latex_language)
 599                 l_shape = false;
 600
 601         // show cursor on screen
 602         Cursor & cur = buffer_view_->cursor();
 603         bool completable = cur.inset().showCompletionCursor()
 604                 && completer_->completionAvailable()
 605                 && !completer_->popupVisible()
 606                 && !completer_->inlineVisible();
 607         cursor_visible_ = true;
 608         cursor_->recomputeWidth();
 609         showCursor(p.x_, p.y_, h, l_shape, isrtl, completable);
 610 }
 611
 612
 613 void GuiWorkArea::hideCursor()
 614 {
 615         if (!cursor_visible_)
 616                 return;
 617
 618         cursor_visible_ = false;
 619         removeCursor();
 620 }
 621
 622
 623 void GuiWorkArea::toggleCursor()
 624 {
 625         if (cursor_visible_)
 626                 hideCursor();
 627         else
 628                 showCursor();
 629 }
 630
 631
 632 void GuiWorkArea::updateScrollbar()
 633 {
 634         ScrollbarParameters const & scroll_ = buffer_view_->scrollbarParameters();
 635         // WARNING: don't touch at the scrollbar value like this:
 636         //   verticalScrollBar()->setValue(scroll_.position);
 637         // because this would cause a recursive signal/slot calling with
 638         // GuiWorkArea::scrollTo
 639         verticalScrollBar()->setRange(scroll_.min, scroll_.max);
 640         verticalScrollBar()->setPageStep(scroll_.page_step);
 641         verticalScrollBar()->setSingleStep(scroll_.single_step);
 642         verticalScrollBar()->setSliderPosition(scroll_.position);
 643 }
 644
 645
 646 void GuiWorkArea::scrollTo(int value)
 647 {
 648         stopBlinkingCursor();
 649         buffer_view_->scrollDocView(value, true);
 650
 651         if (lyxrc.cursor_follows_scrollbar) {
 652                 buffer_view_->setCursorFromScrollbar();
 653                 lyx_view_->updateLayoutList();
 654         }
 655         // Show the cursor immediately after any operation.
 656         startBlinkingCursor();
 657         QApplication::syncX();
 658 }
 659
 660
 661 bool GuiWorkArea::event(QEvent * e)
 662 {
 663         switch (e->type()) {
 664         case QEvent::ToolTip: {
 665                 QHelpEvent * helpEvent = static_cast<QHelpEvent *>(e);
 666                 if (lyxrc.use_tooltip) {
 667                         QPoint pos = helpEvent->pos();
 668                         if (pos.x() < viewport()->width()) {
 669                                 QString s = toqstr(buffer_view_->toolTip(pos.x(), pos.y()));
 670                                 QToolTip::showText(helpEvent->globalPos(), s);
 671                         }
 672                         else
 673                                 QToolTip::hideText();
 674                 }
 675                 // Don't forget to accept the event!
 676                 e->accept();
 677                 return true;
 678         }
 679
 680         case QEvent::ShortcutOverride: {
 681                 // We catch this event in order to catch the Tab or Shift+Tab key press
 682                 // which are otherwise reserved to focus switching between controls
 683                 // within a dialog.
 684                 QKeyEvent * ke = static_cast<QKeyEvent*>(e);
 685                 if ((ke->key() == Qt::Key_Tab && ke->modifiers() == Qt::NoModifier)
 686                         || (ke->key() == Qt::Key_Backtab && (
 687                                 ke->modifiers() == Qt::ShiftModifier
 688                                 || ke->modifiers() == Qt::NoModifier))) {
 689                         keyPressEvent(ke);
 690                         return true;
 691                 }
 692                 return QAbstractScrollArea::event(e);
 693         }
 694
 695         default:
 696                 return QAbstractScrollArea::event(e);
 697         }
 698         return false;
 699 }
 700
 701
 702 void GuiWorkArea::contextMenuEvent(QContextMenuEvent * e)
 703 {
 704         docstring name;
 705         if (e->reason() == QContextMenuEvent::Mouse)
 706                 // the menu name is set on mouse press
 707                 name = context_menu_name_;
 708         else {
 709                 QPoint pos = e->pos();
 710                 Cursor const & cur = buffer_view_->cursor();
 711                 if (e->reason() == QContextMenuEvent::Keyboard && cur.inTexted()) {
 712                         // Do not access the context menu of math right in front of before
 713                         // the cursor. This does not work when the cursor is in text.
 714                         Inset * inset = cur.paragraph().getInset(cur.pos());
 715                         if (inset && inset->asInsetMath())
 716                                 --pos.rx();
 717                         else if (cur.pos() > 0) {
 718                                 Inset * inset = cur.paragraph().getInset(cur.pos() - 1);
 719                                 if (inset)
 720                                         ++pos.rx();
 721                         }
 722                 }
 723                 name = buffer_view_->contextMenu(pos.x(), pos.y());
 724         }
 725
 726         if (name.empty()) {
 727                 QAbstractScrollArea::contextMenuEvent(e);
 728                 return;
 729         }
 730         // always show mnemonics when the keyboard is used to show the context menu
 731         // FIXME: This should be fixed in Qt itself
 732         bool const keyboard = (e->reason() == QContextMenuEvent::Keyboard);
 733         QMenu * menu = guiApp->menus().menu(toqstr(name), *lyx_view_, keyboard);
 734         if (!menu) {
 735                 QAbstractScrollArea::contextMenuEvent(e);
 736                 return;
 737         }
 738         // Position the menu to the right.
 739         // FIXME: menu position should be different for RTL text.
 740         menu->exec(e->globalPos());
 741         e->accept();
 742 }
 743
 744
 745 void GuiWorkArea::focusInEvent(QFocusEvent * e)
 746 {
 747         LYXERR(Debug::DEBUG, "GuiWorkArea::focusInEvent(): " << this << endl);
 748         if (lyx_view_->currentWorkArea() != this)
 749                 lyx_view_->setCurrentWorkArea(this);
 750
 751         startBlinkingCursor();
 752         QAbstractScrollArea::focusInEvent(e);
 753 }
 754
 755
 756 void GuiWorkArea::focusOutEvent(QFocusEvent * e)
 757 {
 758         LYXERR(Debug::DEBUG, "GuiWorkArea::focusOutEvent(): " << this << endl);
 759         stopBlinkingCursor();
 760         QAbstractScrollArea::focusOutEvent(e);
 761 }
 762
 763
 764 void GuiWorkArea::mousePressEvent(QMouseEvent * e)
 765 {
 766         if (dc_event_.active && dc_event_ == *e) {
 767                 dc_event_.active = false;
 768                 FuncRequest cmd(LFUN_MOUSE_TRIPLE, e->x(), e->y(),
 769                         q_button_state(e->button()));
 770                 dispatch(cmd);
 771                 e->accept();
 772                 return;
 773         }
 774
 775         // Save the context menu on mouse press, because also the mouse
 776         // cursor is set on mouse press. Afterwards, we can either release
 777         // the mousebutton somewhere else, or the cursor might have moved
 778         // due to the DEPM.
 779         if (e->button() == Qt::RightButton)
 780                 context_menu_name_ = buffer_view_->contextMenu(e->x(), e->y());
 781
 782         inputContext()->reset();
 783
 784         FuncRequest const cmd(LFUN_MOUSE_PRESS, e->x(), e->y(),
 785                 q_button_state(e->button()));
 786         dispatch(cmd, q_key_state(e->modifiers()));
 787         e->accept();
 788 }
 789
 790
 791 void GuiWorkArea::mouseReleaseEvent(QMouseEvent * e)
 792 {
 793         if (synthetic_mouse_event_.timeout.running())
 794                 synthetic_mouse_event_.timeout.stop();
 795
 796         FuncRequest const cmd(LFUN_MOUSE_RELEASE, e->x(), e->y(),
 797                               q_button_state(e->button()));
 798         dispatch(cmd);
 799         e->accept();
 800 }
 801
 802
 803 void GuiWorkArea::mouseMoveEvent(QMouseEvent * e)
 804 {
 805         // we kill the triple click if we move
 806         doubleClickTimeout();
 807         FuncRequest cmd(LFUN_MOUSE_MOTION, e->x(), e->y(),
 808                 q_motion_state(e->buttons()));
 809
 810         e->accept();
 811
 812         // If we're above or below the work area...
 813         if ((e->y() <= 20 || e->y() >= viewport()->height() - 20)
 814                         && e->buttons() == mouse_button::button1) {
 815                 // Make sure only a synthetic event can cause a page scroll,
 816                 // so they come at a steady rate:
 817                 if (e->y() <= 20)
 818                         // _Force_ a scroll up:
 819                         cmd.set_y(e->y() - 21);
 820                 else
 821                         cmd.set_y(e->y() + 21);
 822                 // Store the event, to be handled when the timeout expires.
 823                 synthetic_mouse_event_.cmd = cmd;
 824
 825                 if (synthetic_mouse_event_.timeout.running()) {
 826                         // Discard the event. Note that it _may_ be handled
 827                         // when the timeout expires if
 828                         // synthetic_mouse_event_.cmd has not been overwritten.
 829                         // Ie, when the timeout expires, we handle the
 830                         // most recent event but discard all others that
 831                         // occurred after the one used to start the timeout
 832                         // in the first place.
 833                         return;
 834                 }
 835
 836                 synthetic_mouse_event_.restart_timeout = true;
 837                 synthetic_mouse_event_.timeout.start();
 838                 // Fall through to handle this event...
 839
 840         } else if (synthetic_mouse_event_.timeout.running()) {
 841                 // Store the event, to be possibly handled when the timeout
 842                 // expires.
 843                 // Once the timeout has expired, normal control is returned
 844                 // to mouseMoveEvent (restart_timeout = false).
 845                 // This results in a much smoother 'feel' when moving the
 846                 // mouse back into the work area.
 847                 synthetic_mouse_event_.cmd = cmd;
 848                 synthetic_mouse_event_.restart_timeout = false;
 849                 return;
 850         }
 851         dispatch(cmd);
 852 }
 853
 854
 855 void GuiWorkArea::wheelEvent(QWheelEvent * ev)
 856 {
 857         // Wheel rotation by one notch results in a delta() of 120 (see
 858         // documentation of QWheelEvent)
 859         double const delta = ev->delta() / 120.0;
 860         bool zoom = false;
 861         switch (lyxrc.scroll_wheel_zoom) {
 862         case LyXRC::SCROLL_WHEEL_ZOOM_CTRL:
 863                 zoom = ev->modifiers() & Qt::ControlModifier;
 864                 zoom &= !(ev->modifiers() & (Qt::ShiftModifier | Qt::AltModifier));
 865                 break;
 866         case LyXRC::SCROLL_WHEEL_ZOOM_SHIFT:
 867                 zoom = ev->modifiers() & Qt::ShiftModifier;
 868                 zoom &= !(ev->modifiers() & (Qt::ControlModifier | Qt::AltModifier));
 869                 break;
 870         case LyXRC::SCROLL_WHEEL_ZOOM_ALT:
 871                 zoom = ev->modifiers() & Qt::AltModifier;
 872                 zoom &= !(ev->modifiers() & (Qt::ShiftModifier | Qt::ControlModifier));
 873                 break;
 874         case LyXRC::SCROLL_WHEEL_ZOOM_OFF:
 875                 break;
 876         }
 877         if (zoom) {
 878                 docstring arg = convert<docstring>(int(5 * delta));
 879                 lyx::dispatch(FuncRequest(LFUN_BUFFER_ZOOM_IN, arg));
 880                 return;
 881         }
 882
 883         // Take into account the desktop wide settings.
 884         int const lines = qApp->wheelScrollLines();
 885         int const page_step = verticalScrollBar()->pageStep();
 886         // Test if the wheel mouse is set to one screen at a time.
 887         int scroll_value = lines > page_step
 888                 ? page_step : lines * verticalScrollBar()->singleStep();
 889
 890         // Take into account the rotation and the user preferences.
 891         scroll_value = int(scroll_value * delta * lyxrc.mouse_wheel_speed);
 892         LYXERR(Debug::SCROLLING, "wheelScrollLines = " << lines
 893                         << " delta = " << delta << " scroll_value = " << scroll_value
 894                         << " page_step = " << page_step);
 895         // Now scroll.
 896         verticalScrollBar()->setValue(verticalScrollBar()->value() - scroll_value);
 897
 898         ev->accept();
 899 }
 900
 901
 902 void GuiWorkArea::generateSyntheticMouseEvent()
 903 {
 904         int const e_y = synthetic_mouse_event_.cmd.y();
 905         int const wh = buffer_view_->workHeight();
 906         bool const up = e_y < 0;
 907         bool const down = e_y > wh;
 908
 909         // Set things off to generate the _next_ 'pseudo' event.
 910         int step = 50;
 911         if (synthetic_mouse_event_.restart_timeout) {
 912                 // This is some magic formulae to determine the speed
 913                 // of scrolling related to the position of the mouse.
 914                 int time = 200;
 915                 if (up || down) {
 916                         int dist = up ? -e_y : e_y - wh;
 917                         time = max(min(200, 250000 / (dist * dist)), 1) ;
 918
 919                         if (time < 40) {
 920                                 step = 80000 / (time * time);
 921                                 time = 40;
 922                         }
 923                 }
 924                 synthetic_mouse_event_.timeout.setTimeout(time);
 925                 synthetic_mouse_event_.timeout.start();
 926         }
 927
 928         // Can we scroll further ?
 929         int const value = verticalScrollBar()->value();
 930         if (value == verticalScrollBar()->maximum()
 931                   || value == verticalScrollBar()->minimum()) {
 932                 synthetic_mouse_event_.timeout.stop();
 933                 return;
 934         }
 935
 936         // Scroll
 937         if (step <= 2 * wh) {
 938                 buffer_view_->scroll(up ? -step : step);
 939                 buffer_view_->updateMetrics();
 940         } else {
 941                 buffer_view_->scrollDocView(value + up ? -step : step, false);
 942         }
 943
 944         // In which paragraph do we have to set the cursor ?
 945         Cursor & cur = buffer_view_->cursor();
 946         // FIXME: we use innerText() because we only know how to handle text.
 947         // so this will not work nicely inside big equation.
 948         TextMetrics const & tm = buffer_view_->textMetrics(cur.innerText());
 949
 950         pair<pit_type, const ParagraphMetrics *> p = up ? tm.first() : tm.last();
 951         ParagraphMetrics const & pm = *p.second;
 952         pit_type const pit = p.first;
 953
 954         if (pm.rows().empty())
 955                 return;
 956
 957         // Find the row at which we set the cursor.
 958         RowList::const_iterator rit = pm.rows().begin();
 959         RowList::const_iterator rlast = pm.rows().end();
 960         int yy = pm.position() - pm.ascent();
 961         for (--rlast; rit != rlast; ++rit) {
 962                 int h = rit->height();
 963                 if ((up && yy + h > 0)
 964                           || (!up && yy + h > wh - defaultRowHeight()))
 965                         break;
 966                 yy += h;
 967         }
 968
 969         // Find the position of the cursor
 970         bool bound;
 971         int x = synthetic_mouse_event_.cmd.x();
 972         pos_type const pos = rit->pos() + tm.getColumnNearX(pit, *rit, x, bound);
 973
 974         // Set the cursor
 975         cur.pit() = pit;
 976         cur.pos() = pos;
 977         cur.boundary(bound);
 978
 979         buffer_view_->buffer().changed(false);
 980         return;
 981 }
 982
 983
 984 void GuiWorkArea::keyPressEvent(QKeyEvent * ev)
 985 {
 986         // Do not process here some keys if dialog_mode_ is set
 987         if (dialog_mode_
 988                 && (ev->modifiers() == Qt::NoModifier
 989                     || ev->modifiers() == Qt::ShiftModifier)
 990                 && (ev->key() == Qt::Key_Escape
 991                     || ev->key() == Qt::Key_Enter
 992                     || ev->key() == Qt::Key_Return)
 993             ) {
 994                 ev->ignore();
 995                 return;
 996         }
 997
 998         // intercept some keys if completion popup is visible
 999         if (completer_->popupVisible()) {
1000                 switch (ev->key()) {
1001                 case Qt::Key_Enter:
1002                 case Qt::Key_Return:
1003                         completer_->activate();
1004                         ev->accept();
1005                         return;
1006                 }
1007         }
1008
1009         // do nothing if there are other events
1010         // (the auto repeated events come too fast)
1011         // it looks like this is only needed on X11
1012 #ifdef Q_WS_X11
1013         if (qApp->hasPendingEvents() && ev->isAutoRepeat()) {
1014                 LYXERR(Debug::KEY, "system is busy: keyPress event ignored");
1015                 ev->ignore();
1016                 return;
1017         }
1018 #endif
1019
1020         KeyModifier m = q_key_state(ev->modifiers());
1021
1022         std::string str;
1023         if (m & ShiftModifier)
1024                 str += "Shift-";
1025         if (m & ControlModifier)
1026                 str += "Control-";
1027         if (m & AltModifier)
1028                 str += "Alt-";
1029         if (m & MetaModifier)
1030                 str += "Meta-";
1031
1032         LYXERR(Debug::KEY, " count: " << ev->count() << " text: " << ev->text()
1033                 << " isAutoRepeat: " << ev->isAutoRepeat() << " key: " << ev->key()
1034                 << " keyState: " << str);
1035
1036         KeySymbol sym;
1037         setKeySymbol(&sym, ev);
1038         if (sym.isOK()) {
1039                 processKeySym(sym, q_key_state(ev->modifiers()));
1040                 ev->accept();
1041         } else {
1042                 ev->ignore();
1043         }
1044 }
1045
1046
1047 void GuiWorkArea::doubleClickTimeout()
1048 {
1049         dc_event_.active = false;
1050 }
1051
1052
1053 void GuiWorkArea::mouseDoubleClickEvent(QMouseEvent * ev)
1054 {
1055         dc_event_ = DoubleClick(ev);
1056         QTimer::singleShot(QApplication::doubleClickInterval(), this,
1057                            SLOT(doubleClickTimeout()));
1058         FuncRequest cmd(LFUN_MOUSE_DOUBLE,
1059                         ev->x(), ev->y(),
1060                         q_button_state(ev->button()));
1061         dispatch(cmd);
1062         ev->accept();
1063 }
1064
1065
1066 void GuiWorkArea::resizeEvent(QResizeEvent * ev)
1067 {
1068         QAbstractScrollArea::resizeEvent(ev);
1069         need_resize_ = true;
1070         ev->accept();
1071 }
1072
1073
1074 void GuiWorkArea::update(int x, int y, int w, int h)
1075 {
1076         viewport()->repaint(x, y, w, h);
1077 }
1078
1079
1080 void GuiWorkArea::paintEvent(QPaintEvent * ev)
1081 {
1082         QRect const rc = ev->rect();
1083         // LYXERR(Debug::PAINTING, "paintEvent begin: x: " << rc.x()
1084         //      << " y: " << rc.y() << " w: " << rc.width() << " h: " << rc.height());
1085
1086         if (need_resize_) {
1087                 screen_ = QPixmap(viewport()->width(), viewport()->height());
1088                 resizeBufferView();
1089                 if (cursor_visible_) {
1090                         hideCursor();
1091                         showCursor();
1092                 }
1093         }
1094
1095         QPainter pain(viewport());
1096         pain.drawPixmap(rc, screen_, rc);
1097         cursor_->draw(pain);
1098         ev->accept();
1099 }
1100
1101
1102 void GuiWorkArea::updateScreen()
1103 {
1104         GuiPainter pain(&screen_);
1105         buffer_view_->draw(pain);
1106 }
1107
1108
1109 void GuiWorkArea::showCursor(int x, int y, int h,
1110         bool l_shape, bool rtl, bool completable)
1111 {
1112         if (schedule_redraw_) {
1113                 // This happens when a graphic conversion is finished. As we don't know
1114                 // the size of the new graphics, it's better the update everything.
1115                 // We can't use redraw() here because this would trigger a infinite
1116                 // recursive loop with showCursor().
1117                 buffer_view_->resize(viewport()->width(), viewport()->height());
1118                 updateScreen();
1119                 updateScrollbar();
1120                 viewport()->update(QRect(0, 0, viewport()->width(), viewport()->height()));
1121                 schedule_redraw_ = false;
1122                 // Show the cursor immediately after the update.
1123                 hideCursor();
1124                 toggleCursor();
1125                 return;
1126         }
1127
1128         cursor_->update(x, y, h, l_shape, rtl, completable);
1129         cursor_->show();
1130         viewport()->update(cursor_->rect());
1131 }
1132
1133
1134 void GuiWorkArea::removeCursor()
1135 {
1136         cursor_->hide();
1137         //if (!qApp->focusWidget())
1138                 viewport()->update(cursor_->rect());
1139 }
1140
1141
1142 void GuiWorkArea::inputMethodEvent(QInputMethodEvent * e)
1143 {
1144         QString const & commit_string = e->commitString();
1145         docstring const & preedit_string
1146                 = qstring_to_ucs4(e->preeditString());
1147
1148         if (!commit_string.isEmpty()) {
1149
1150                 LYXERR(Debug::KEY, "preeditString: " << e->preeditString()
1151                         << " commitString: " << e->commitString());
1152
1153                 int key = 0;
1154
1155                 // FIXME Iwami 04/01/07: we should take care also of UTF16 surrogates here.
1156                 for (int i = 0; i != commit_string.size(); ++i) {
1157                         QKeyEvent ev(QEvent::KeyPress, key, Qt::NoModifier, commit_string[i]);
1158                         keyPressEvent(&ev);
1159                 }
1160         }
1161
1162         // Hide the cursor during the kana-kanji transformation.
1163         if (preedit_string.empty())
1164                 startBlinkingCursor();
1165         else
1166                 stopBlinkingCursor();
1167
1168         // last_width : for checking if last preedit string was/wasn't empty.
1169         static bool last_width = false;
1170         if (!last_width && preedit_string.empty()) {
1171                 // if last_width is last length of preedit string.
1172                 e->accept();
1173                 return;
1174         }
1175
1176         GuiPainter pain(&screen_);
1177         buffer_view_->updateMetrics();
1178         buffer_view_->draw(pain);
1179         FontInfo font = buffer_view_->cursor().getFont().fontInfo();
1180         FontMetrics const & fm = theFontMetrics(font);
1181         int height = fm.maxHeight();
1182         int cur_x = cursor_->rect().left();
1183         int cur_y = cursor_->rect().bottom();
1184
1185         // redraw area of preedit string.
1186         update(0, cur_y - height, viewport()->width(),
1187                 (height + 1) * preedit_lines_);
1188
1189         if (preedit_string.empty()) {
1190                 last_width = false;
1191                 preedit_lines_ = 1;
1192                 e->accept();
1193                 return;
1194         }
1195         last_width = true;
1196
1197         // att : stores an IM attribute.
1198         QList<QInputMethodEvent::Attribute> const & att = e->attributes();
1199
1200         // get attributes of input method cursor.
1201         // cursor_pos : cursor position in preedit string.
1202         size_t cursor_pos = 0;
1203         bool cursor_is_visible = false;
1204         for (int i = 0; i != att.size(); ++i) {
1205                 if (att.at(i).type == QInputMethodEvent::Cursor) {
1206                         cursor_pos = att.at(i).start;
1207                         cursor_is_visible = att.at(i).length != 0;
1208                         break;
1209                 }
1210         }
1211
1212         size_t preedit_length = preedit_string.length();
1213
1214         // get position of selection in input method.
1215         // FIXME: isn't there a way to do this simplier?
1216         // rStart : cursor position in selected string in IM.
1217         size_t rStart = 0;
1218         // rLength : selected string length in IM.
1219         size_t rLength = 0;
1220         if (cursor_pos < preedit_length) {
1221                 for (int i = 0; i != att.size(); ++i) {
1222                         if (att.at(i).type == QInputMethodEvent::TextFormat) {
1223                                 if (att.at(i).start <= int(cursor_pos)
1224                                         && int(cursor_pos) < att.at(i).start + att.at(i).length) {
1225                                                 rStart = att.at(i).start;
1226                                                 rLength = att.at(i).length;
1227                                                 if (!cursor_is_visible)
1228                                                         cursor_pos += rLength;
1229                                                 break;
1230                                 }
1231                         }
1232                 }
1233         }
1234         else {
1235                 rStart = cursor_pos;
1236                 rLength = 0;
1237         }
1238
1239         int const right_margin = buffer_view_->rightMargin();
1240         Painter::preedit_style ps;
1241         // Most often there would be only one line:
1242         preedit_lines_ = 1;
1243         for (size_t pos = 0; pos != preedit_length; ++pos) {
1244                 char_type const typed_char = preedit_string[pos];
1245                 // reset preedit string style
1246                 ps = Painter::preedit_default;
1247
1248                 // if we reached the right extremity of the screen, go to next line.
1249                 if (cur_x + fm.width(typed_char) > viewport()->width() - right_margin) {
1250                         cur_x = right_margin;
1251                         cur_y += height + 1;
1252                         ++preedit_lines_;
1253                 }
1254                 // preedit strings are displayed with dashed underline
1255                 // and partial strings are displayed white on black indicating
1256                 // that we are in selecting mode in the input method.
1257                 // FIXME: rLength == preedit_length is not a changing condition
1258                 // FIXME: should be put out of the loop.
1259                 if (pos >= rStart
1260                         && pos < rStart + rLength
1261                         && !(cursor_pos < rLength && rLength == preedit_length))
1262                         ps = Painter::preedit_selecting;
1263
1264                 if (pos == cursor_pos
1265                         && (cursor_pos < rLength && rLength == preedit_length))
1266                         ps = Painter::preedit_cursor;
1267
1268                 // draw one character and update cur_x.
1269                 cur_x += pain.preeditText(cur_x, cur_y, typed_char, font, ps);
1270         }
1271
1272         // update the preedit string screen area.
1273         update(0, cur_y - preedit_lines_*height, viewport()->width(),
1274                 (height + 1) * preedit_lines_);
1275
1276         // Don't forget to accept the event!
1277         e->accept();
1278 }
1279
1280
1281 QVariant GuiWorkArea::inputMethodQuery(Qt::InputMethodQuery query) const
1282 {
1283         QRect cur_r(0, 0, 0, 0);
1284         switch (query) {
1285                 // this is the CJK-specific composition window position and
1286                 // the context menu position when the menu key is pressed.
1287                 case Qt::ImMicroFocus:
1288                         cur_r = cursor_->rect();
1289                         if (preedit_lines_ != 1)
1290                                 cur_r.moveLeft(10);
1291                         cur_r.moveBottom(cur_r.bottom()
1292                                 + cur_r.height() * (preedit_lines_ - 1));
1293                         // return lower right of cursor in LyX.
1294                         return cur_r;
1295                 default:
1296                         return QWidget::inputMethodQuery(query);
1297         }
1298 }
1299
1300
1301 void GuiWorkArea::updateWindowTitle()
1302 {
1303         docstring maximize_title;
1304         docstring minimize_title;
1305
1306         Buffer const & buf = buffer_view_->buffer();
1307         FileName const file_name = buf.fileName();
1308         if (!file_name.empty()) {
1309                 maximize_title = file_name.displayName(130);
1310                 minimize_title = from_utf8(file_name.onlyFileName());
1311                 if (buf.lyxvc().inUse()) {
1312                         if (buf.lyxvc().locking())
1313                                 maximize_title +=  _(" (version control, locking)");
1314                         else
1315                                 maximize_title +=  _(" (version control)");
1316                 }
1317                 if (!buf.isClean()) {
1318                         maximize_title += _(" (changed)");
1319                         minimize_title += char_type('*');
1320                 }
1321                 if (buf.isReadonly())
1322                         maximize_title += _(" (read only)");
1323         }
1324
1325         QString const new_title = toqstr(maximize_title);
1326         if (new_title != windowTitle()) {
1327                 QWidget::setWindowTitle(new_title);
1328                 QWidget::setWindowIconText(toqstr(minimize_title));
1329                 titleChanged(this);
1330         }
1331 }
1332
1333
1334 void GuiWorkArea::setReadOnly(bool read_only)
1335 {
1336         if (read_only_ == read_only)
1337                 return;
1338         read_only_ = read_only;
1339         updateWindowTitle();
1340         if (this == lyx_view_->currentWorkArea())
1341                 lyx_view_->updateDialogs();
1342 }
1343
1344
1345 bool GuiWorkArea::isFullScreen()
1346 {
1347         return lyx_view_ && lyx_view_->isFullScreen();
1348 }
1349
1350
1351 ////////////////////////////////////////////////////////////////////
1352 //
1353 // EmbeddedWorkArea
1354 //
1355 ////////////////////////////////////////////////////////////////////
1356
1357
1358 EmbeddedWorkArea::EmbeddedWorkArea(QWidget * w): GuiWorkArea(w)
1359 {
1360         buffer_ = theBufferList().newBuffer(
1361                 support::FileName::tempName().absFileName() + "_embedded.internal");
1362         buffer_->setUnnamed(true);
1363         buffer_->setFullyLoaded(true);
1364         setBuffer(*buffer_);
1365         setDialogMode(true);
1366 }
1367
1368
1369 EmbeddedWorkArea::~EmbeddedWorkArea()
1370 {
1371         // No need to destroy buffer and bufferview here, because it is done
1372         // in theBufferList() destruction loop at application exit
1373 }
1374
1375
1376 void EmbeddedWorkArea::closeEvent(QCloseEvent * ev)
1377 {
1378         disable();
1379         GuiWorkArea::closeEvent(ev);
1380 }
1381
1382
1383 void EmbeddedWorkArea::hideEvent(QHideEvent * ev)
1384 {
1385         disable();
1386         GuiWorkArea::hideEvent(ev);
1387 }
1388
1389
1390 QSize EmbeddedWorkArea::sizeHint () const
1391 {
1392         // FIXME(?):
1393         // GuiWorkArea sets the size to the screen's viewport
1394         // by returning a value this gets overridden
1395         // EmbeddedWorkArea is now sized to fit in the layout
1396         // of the parent, and has a minimum size set in GuiWorkArea
1397         // which is what we return here
1398         return QSize(100, 70);
1399 }
1400
1401
1402 void EmbeddedWorkArea::disable()
1403 {
1404         stopBlinkingCursor();
1405         if (view().currentWorkArea() != this)
1406                 return;
1407         // No problem if currentMainWorkArea() is 0 (setCurrentWorkArea()
1408         // tolerates it and shows the background logo), what happens if
1409         // an EmbeddedWorkArea is closed after closing all document WAs
1410         view().setCurrentWorkArea(view().currentMainWorkArea());
1411 }
1412
1413 ////////////////////////////////////////////////////////////////////
1414 //
1415 // TabWorkArea
1416 //
1417 ////////////////////////////////////////////////////////////////////
1418
1419 #ifdef Q_WS_MACX
1420 class NoTabFrameMacStyle : public QMacStyle {
1421 public:
1422         ///
1423         QRect subElementRect(SubElement element, const QStyleOption * option,
1424                              const QWidget * widget = 0) const
1425         {
1426                 QRect rect = QMacStyle::subElementRect(element, option, widget);
1427                 bool noBar = static_cast<QTabWidget const *>(widget)->count() <= 1;
1428
1429                 // The Qt Mac style puts the contents into a 3 pixel wide box
1430                 // which looks very ugly and not like other Mac applications.
1431                 // Hence we remove this here, and moreover the 16 pixel round
1432                 // frame above if the tab bar is hidden.
1433                 if (element == QStyle::SE_TabWidgetTabContents) {
1434                         rect.adjust(- rect.left(), 0, rect.left(), 0);
1435                         if (noBar)
1436                                 rect.setTop(0);
1437                 }
1438
1439                 return rect;
1440         }
1441 };
1442
1443 NoTabFrameMacStyle noTabFrameMacStyle;
1444 #endif
1445
1446
1447 TabWorkArea::TabWorkArea(QWidget * parent)
1448         : QTabWidget(parent), clicked_tab_(-1)
1449 {
1450 #ifdef Q_WS_MACX
1451         setStyle(&noTabFrameMacStyle);
1452 #endif
1453 #if QT_VERSION < 0x040500
1454         lyxrc.single_close_tab_button = true;
1455 #endif
1456
1457         QPalette pal = palette();
1458         pal.setColor(QPalette::Active, QPalette::Button,
1459                 pal.color(QPalette::Active, QPalette::Window));
1460         pal.setColor(QPalette::Disabled, QPalette::Button,
1461                 pal.color(QPalette::Disabled, QPalette::Window));
1462         pal.setColor(QPalette::Inactive, QPalette::Button,
1463                 pal.color(QPalette::Inactive, QPalette::Window));
1464
1465         QObject::connect(this, SIGNAL(currentChanged(int)),
1466                 this, SLOT(on_currentTabChanged(int)));
1467
1468         closeBufferButton = new QToolButton(this);
1469         closeBufferButton->setPalette(pal);
1470         // FIXME: rename the icon to closebuffer.png
1471         closeBufferButton->setIcon(QIcon(getPixmap("images/", "closetab", "png")));
1472         closeBufferButton->setText("Close File");
1473         closeBufferButton->setAutoRaise(true);
1474         closeBufferButton->setCursor(Qt::ArrowCursor);
1475         closeBufferButton->setToolTip(qt_("Close File"));
1476         closeBufferButton->setEnabled(true);
1477         QObject::connect(closeBufferButton, SIGNAL(clicked()),
1478                 this, SLOT(closeCurrentBuffer()));
1479         setCornerWidget(closeBufferButton, Qt::TopRightCorner);
1480
1481         // setup drag'n'drop
1482         QTabBar* tb = new DragTabBar;
1483         connect(tb, SIGNAL(tabMoveRequested(int, int)),
1484                 this, SLOT(moveTab(int, int)));
1485         tb->setElideMode(Qt::ElideNone);
1486         setTabBar(tb);
1487
1488         // make us responsible for the context menu of the tabbar
1489         tb->setContextMenuPolicy(Qt::CustomContextMenu);
1490         connect(tb, SIGNAL(customContextMenuRequested(const QPoint &)),
1491                 this, SLOT(showContextMenu(const QPoint &)));
1492 #if QT_VERSION >= 0x040500
1493         connect(tb, SIGNAL(tabCloseRequested(int)),
1494                 this, SLOT(closeTab(int)));
1495 #endif
1496
1497         setUsesScrollButtons(true);
1498 }
1499
1500
1501 void TabWorkArea::mouseDoubleClickEvent(QMouseEvent * event)
1502 {
1503         if (event->button() != Qt::LeftButton)
1504                 return;
1505
1506         // return early if double click on existing tabs
1507         for (int i = 0; i < count(); ++i)
1508                 if (tabBar()->tabRect(i).contains(event->pos()))
1509                         return;
1510
1511         dispatch(FuncRequest(LFUN_BUFFER_NEW));
1512 }
1513
1514
1515 void TabWorkArea::setFullScreen(bool full_screen)
1516 {
1517         for (int i = 0; i != count(); ++i) {
1518                 if (GuiWorkArea * wa = workArea(i))
1519                         wa->setFullScreen(full_screen);
1520         }
1521
1522         if (lyxrc.full_screen_tabbar)
1523                 showBar(!full_screen && count() > 1);
1524 }
1525
1526
1527 void TabWorkArea::showBar(bool show)
1528 {
1529         tabBar()->setEnabled(show);
1530         tabBar()->setVisible(show);
1531         closeBufferButton->setVisible(show && lyxrc.single_close_tab_button);
1532 #if QT_VERSION >= 0x040500
1533         setTabsClosable(!lyxrc.single_close_tab_button);
1534 #endif
1535 }
1536
1537
1538 GuiWorkArea * TabWorkArea::currentWorkArea()
1539 {
1540         if (count() == 0)
1541                 return 0;
1542
1543         GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(currentWidget());
1544         LASSERT(wa, /**/);
1545         return wa;
1546 }
1547
1548
1549 GuiWorkArea * TabWorkArea::workArea(int index)
1550 {
1551         return dynamic_cast<GuiWorkArea *>(widget(index));
1552 }
1553
1554
1555 GuiWorkArea * TabWorkArea::workArea(Buffer & buffer)
1556 {
1557         // FIXME: this method doesn't work if we have more than work area
1558         // showing the same buffer.
1559         for (int i = 0; i != count(); ++i) {
1560                 GuiWorkArea * wa = workArea(i);
1561                 LASSERT(wa, return 0);
1562                 if (&wa->bufferView().buffer() == &buffer)
1563                         return wa;
1564         }
1565         return 0;
1566 }
1567
1568
1569 void TabWorkArea::closeAll()
1570 {
1571         while (count()) {
1572                 GuiWorkArea * wa = workArea(0);
1573                 LASSERT(wa, /**/);
1574                 removeTab(0);
1575                 delete wa;
1576         }
1577 }
1578
1579
1580 bool TabWorkArea::setCurrentWorkArea(GuiWorkArea * work_area)
1581 {
1582         LASSERT(work_area, /**/);
1583         int index = indexOf(work_area);
1584         if (index == -1)
1585                 return false;
1586
1587         if (index == currentIndex())
1588                 // Make sure the work area is up to date.
1589                 on_currentTabChanged(index);
1590         else
1591                 // Switch to the work area.
1592                 setCurrentIndex(index);
1593         work_area->setFocus();
1594
1595         return true;
1596 }
1597
1598
1599 GuiWorkArea * TabWorkArea::addWorkArea(Buffer & buffer, GuiView & view)
1600 {
1601         GuiWorkArea * wa = new GuiWorkArea(buffer, view);
1602         wa->setUpdatesEnabled(false);
1603         // Hide tabbar if there's no tab (avoid a resize and a flashing tabbar
1604         // when hiding it again below).
1605         if (!(currentWorkArea() && currentWorkArea()->isFullScreen()))
1606                 showBar(count() > 0);
1607         addTab(wa, wa->windowTitle());
1608         QObject::connect(wa, SIGNAL(titleChanged(GuiWorkArea *)),
1609                 this, SLOT(updateTabTexts()));
1610         if (currentWorkArea() && currentWorkArea()->isFullScreen())
1611                 setFullScreen(true);
1612         else
1613                 // Hide tabbar if there's only one tab.
1614                 showBar(count() > 1);
1615
1616         updateTabTexts();
1617
1618         return wa;
1619 }
1620
1621
1622 bool TabWorkArea::removeWorkArea(GuiWorkArea * work_area)
1623 {
1624         LASSERT(work_area, return false);
1625         int index = indexOf(work_area);
1626         if (index == -1)
1627                 return false;
1628
1629         work_area->setUpdatesEnabled(false);
1630         removeTab(index);
1631         delete work_area;
1632
1633         if (count()) {
1634                 // make sure the next work area is enabled.
1635                 currentWidget()->setUpdatesEnabled(true);
1636                 if (currentWorkArea() && currentWorkArea()->isFullScreen())
1637                         setFullScreen(true);
1638                 else
1639                         // Show tabbar only if there's more than one tab.
1640                         showBar(count() > 1);
1641         } else
1642                 lastWorkAreaRemoved();
1643
1644         updateTabTexts();
1645
1646         return true;
1647 }
1648
1649
1650 void TabWorkArea::on_currentTabChanged(int i)
1651 {
1652         // returns e.g. on application destruction
1653         if (i == -1)
1654                 return;
1655         GuiWorkArea * wa = workArea(i);
1656         LASSERT(wa, return);
1657         wa->setUpdatesEnabled(true);
1658         wa->redraw(true);
1659         wa->setFocus();
1660         ///
1661         currentWorkAreaChanged(wa);
1662
1663         LYXERR(Debug::GUI, "currentTabChanged " << i
1664                 << " File: " << wa->bufferView().buffer().absFileName());
1665 }
1666
1667
1668 void TabWorkArea::closeCurrentBuffer()
1669 {
1670         GuiWorkArea * wa;
1671         if (clicked_tab_ == -1)
1672                 wa = currentWorkArea();
1673         else {
1674                 wa = workArea(clicked_tab_);
1675                 LASSERT(wa, /**/);
1676         }
1677         wa->view().closeWorkArea(wa);
1678 }
1679
1680
1681 void TabWorkArea::hideCurrentTab()
1682 {
1683         GuiWorkArea * wa;
1684         if (clicked_tab_ == -1)
1685                 wa = currentWorkArea();
1686         else {
1687                 wa = workArea(clicked_tab_);
1688                 LASSERT(wa, /**/);
1689         }
1690         wa->view().hideWorkArea(wa);
1691 }
1692
1693
1694 void TabWorkArea::closeTab(int index)
1695 {
1696         on_currentTabChanged(index);
1697         GuiWorkArea * wa;
1698         if (index == -1)
1699                 wa = currentWorkArea();
1700         else {
1701                 wa = workArea(index);
1702                 LASSERT(wa, /**/);
1703         }
1704         wa->view().closeWorkArea(wa);
1705 }
1706
1707
1708 ///
1709 class DisplayPath {
1710 public:
1711         /// make vector happy
1712         DisplayPath() {}
1713         ///
1714         DisplayPath(int tab, FileName const & filename)
1715                 : tab_(tab)
1716         {
1717                 filename_ = (filename.extension() == "lyx") ?
1718                         toqstr(filename.onlyFileNameWithoutExt())
1719                         : toqstr(filename.onlyFileName());
1720                 postfix_ = toqstr(filename.absoluteFilePath()).
1721                         split("/", QString::SkipEmptyParts);
1722                 postfix_.pop_back();
1723                 abs_ = toqstr(filename.absoluteFilePath());
1724                 dottedPrefix_ = false;
1725         }
1726
1727         /// Absolute path for debugging.
1728         QString abs() const
1729         {
1730                 return abs_;
1731         }
1732         /// Add the first segment from the postfix or three dots to the prefix.
1733         /// Merge multiple dot tripples. In fact dots are added lazily, i.e. only
1734         /// when really needed.
1735         void shiftPathSegment(bool dotted)
1736         {
1737                 if (postfix_.count() <= 0)
1738                         return;
1739
1740                 if (!dotted) {
1741                         if (dottedPrefix_ && !prefix_.isEmpty())
1742                                 prefix_ += ".../";
1743                         prefix_ += postfix_.front() + "/";
1744                 }
1745                 dottedPrefix_ = dotted && !prefix_.isEmpty();
1746                 postfix_.pop_front();
1747         }
1748         ///
1749         QString displayString() const
1750         {
1751                 if (prefix_.isEmpty())
1752                         return filename_;
1753
1754                 bool dots = dottedPrefix_ || !postfix_.isEmpty();
1755                 return prefix_ + (dots ? ".../" : "") + filename_;
1756         }
1757         ///
1758         QString forecastPathString() const
1759         {
1760                 if (postfix_.count() == 0)
1761                         return displayString();
1762
1763                 return prefix_
1764                         + (dottedPrefix_ ? ".../" : "")
1765                         + postfix_.front() + "/";
1766         }
1767         ///
1768         bool final() const { return postfix_.empty(); }
1769         ///
1770         int tab() const { return tab_; }
1771
1772 private:
1773         ///
1774         QString prefix_;
1775         ///
1776         QStringList postfix_;
1777         ///
1778         QString filename_;
1779         ///
1780         QString abs_;
1781         ///
1782         int tab_;
1783         ///
1784         bool dottedPrefix_;
1785 };
1786
1787
1788 ///
1789 bool operator<(DisplayPath const & a, DisplayPath const & b)
1790 {
1791         return a.displayString() < b.displayString();
1792 }
1793
1794 ///
1795 bool operator==(DisplayPath const & a, DisplayPath const & b)
1796 {
1797         return a.displayString() == b.displayString();
1798 }
1799
1800
1801 void TabWorkArea::updateTabTexts()
1802 {
1803         size_t n = count();
1804         if (n == 0)
1805                 return;
1806         std::list<DisplayPath> paths;
1807         typedef std::list<DisplayPath>::iterator It;
1808
1809         // collect full names first: path into postfix, empty prefix and
1810         // filename without extension
1811         for (size_t i = 0; i < n; ++i) {
1812                 GuiWorkArea * i_wa = workArea(i);
1813                 FileName const fn = i_wa->bufferView().buffer().fileName();
1814                 paths.push_back(DisplayPath(i, fn));
1815         }
1816
1817         // go through path segments and see if it helps to make the path more unique
1818         bool somethingChanged = true;
1819         bool allFinal = false;
1820         while (somethingChanged && !allFinal) {
1821                 // adding path segments changes order
1822                 paths.sort();
1823
1824                 LYXERR(Debug::GUI, "updateTabTexts() iteration start");
1825                 somethingChanged = false;
1826                 allFinal = true;
1827
1828                 // find segments which are not unique (i.e. non-atomic)
1829                 It it = paths.begin();
1830                 It segStart = it;
1831                 QString segString = it->displayString();
1832                 for (; it != paths.end(); ++it) {
1833                         // look to the next item
1834                         It next = it;
1835                         ++next;
1836
1837                         // final?
1838                         allFinal = allFinal && it->final();
1839
1840                         LYXERR(Debug::GUI, "it = " << it->abs()
1841                                << " => " << it->displayString());
1842
1843                         // still the same segment?
1844                         QString nextString;
1845                         if ((next != paths.end()
1846                              && (nextString = next->displayString()) == segString))
1847                                 continue;
1848                         LYXERR(Debug::GUI, "segment ended");
1849
1850                         // only a trivial one with one element?
1851                         if (it == segStart) {
1852                                 // start new segment
1853                                 segStart = next;
1854                                 segString = nextString;
1855                                 continue;
1856                         }
1857
1858                         // we found a non-atomic segment segStart <= sit <= it < next.
1859                         // Shift path segments and hope for the best
1860                         // that it makes the path more unique.
1861                         somethingChanged = true;
1862                         It sit = segStart;
1863                         QString dspString = sit->forecastPathString();
1864                         LYXERR(Debug::GUI, "first forecast found for "
1865                                << sit->abs() << " => " << dspString);
1866                         ++sit;
1867                         bool moreUnique = false;
1868                         for (; sit != next; ++sit) {
1869                                 if (sit->forecastPathString() != dspString) {
1870                                         LYXERR(Debug::GUI, "different forecast found for "
1871                                                 << sit->abs() << " => " << sit->forecastPathString());
1872                                         moreUnique = true;
1873                                         break;
1874                                 }
1875                                 LYXERR(Debug::GUI, "same forecast found for "
1876                                         << sit->abs() << " => " << dspString);
1877                         }
1878
1879                         // if the path segment helped, add it. Otherwise add dots
1880                         bool dots = !moreUnique;
1881                         LYXERR(Debug::GUI, "using dots = " << dots);
1882                         for (sit = segStart; sit != next; ++sit) {
1883                                 sit->shiftPathSegment(dots);
1884                                 LYXERR(Debug::GUI, "shifting "
1885                                         << sit->abs() << " => " << sit->displayString());
1886                         }
1887
1888                         // start new segment
1889                         segStart = next;
1890                         segString = nextString;
1891                 }
1892         }
1893
1894         // set new tab titles
1895         for (It it = paths.begin(); it != paths.end(); ++it) {
1896                 int const tab_index = it->tab();
1897                 Buffer const & buf = workArea(tab_index)->bufferView().buffer();
1898                 QString tab_text = it->displayString();
1899                 if (!buf.fileName().empty() && !buf.isClean())
1900                         tab_text += "*";
1901                 setTabText(tab_index, tab_text);
1902                 setTabToolTip(tab_index, it->abs());
1903         }
1904 }
1905
1906
1907 void TabWorkArea::showContextMenu(const QPoint & pos)
1908 {
1909         // which tab?
1910         clicked_tab_ = static_cast<DragTabBar *>(tabBar())->tabAt(pos);
1911         if (clicked_tab_ == -1)
1912                 return;
1913
1914         // show tab popup
1915         QMenu popup;
1916         popup.addAction(QIcon(getPixmap("images/", "hidetab", "png")),
1917                 qt_("Hide tab"), this, SLOT(hideCurrentTab()));
1918         popup.addAction(QIcon(getPixmap("images/", "closetab", "png")),
1919                 qt_("Close tab"), this, SLOT(closeCurrentBuffer()));
1920         popup.exec(tabBar()->mapToGlobal(pos));
1921
1922         clicked_tab_ = -1;
1923 }
1924
1925
1926 void TabWorkArea::moveTab(int fromIndex, int toIndex)
1927 {
1928         QWidget * w = widget(fromIndex);
1929         QIcon icon = tabIcon(fromIndex);
1930         QString text = tabText(fromIndex);
1931
1932         setCurrentIndex(fromIndex);
1933         removeTab(fromIndex);
1934         insertTab(toIndex, w, icon, text);
1935         setCurrentIndex(toIndex);
1936 }
1937
1938
1939 DragTabBar::DragTabBar(QWidget* parent)
1940         : QTabBar(parent)
1941 {
1942         setAcceptDrops(true);
1943 #if QT_VERSION >= 0x040500
1944         setTabsClosable(!lyxrc.single_close_tab_button);
1945 #endif
1946 }
1947
1948
1949 #if QT_VERSION < 0x040300
1950 int DragTabBar::tabAt(QPoint const & position) const
1951 {
1952         const int max = count();
1953         for (int i = 0; i < max; ++i) {
1954                 if (tabRect(i).contains(position))
1955                         return i;
1956         }
1957         return -1;
1958 }
1959 #endif
1960
1961
1962 void DragTabBar::mousePressEvent(QMouseEvent * event)
1963 {
1964         if (event->button() == Qt::LeftButton)
1965                 dragStartPos_ = event->pos();
1966         QTabBar::mousePressEvent(event);
1967 }
1968
1969
1970 void DragTabBar::mouseMoveEvent(QMouseEvent * event)
1971 {
1972         // If the left button isn't pressed anymore then return
1973         if (!(event->buttons() & Qt::LeftButton))
1974                 return;
1975
1976         // If the distance is too small then return
1977         if ((event->pos() - dragStartPos_).manhattanLength()
1978             < QApplication::startDragDistance())
1979                 return;
1980
1981         // did we hit something after all?
1982         int tab = tabAt(dragStartPos_);
1983         if (tab == -1)
1984                 return;
1985
1986         // simulate button release to remove highlight from button
1987         int i = currentIndex();
1988         QMouseEvent me(QEvent::MouseButtonRelease, dragStartPos_,
1989                 event->button(), event->buttons(), 0);
1990         QTabBar::mouseReleaseEvent(&me);
1991         setCurrentIndex(i);
1992
1993         // initiate Drag
1994         QDrag * drag = new QDrag(this);
1995         QMimeData * mimeData = new QMimeData;
1996         // a crude way to distinguish tab-reodering drops from other ones
1997         mimeData->setData("action", "tab-reordering") ;
1998         drag->setMimeData(mimeData);
1999
2000 #if QT_VERSION >= 0x040300
2001         // get tab pixmap as cursor
2002         QRect r = tabRect(tab);
2003         QPixmap pixmap(r.size());
2004         render(&pixmap, - r.topLeft());
2005         drag->setPixmap(pixmap);
2006         drag->exec();
2007 #else
2008         drag->start(Qt::MoveAction);
2009 #endif
2010
2011 }
2012
2013
2014 void DragTabBar::dragEnterEvent(QDragEnterEvent * event)
2015 {
2016         // Only accept if it's an tab-reordering request
2017         QMimeData const * m = event->mimeData();
2018         QStringList formats = m->formats();
2019         if (formats.contains("action")
2020             && m->data("action") == "tab-reordering")
2021                 event->acceptProposedAction();
2022 }
2023
2024
2025 void DragTabBar::dropEvent(QDropEvent * event)
2026 {
2027         int fromIndex = tabAt(dragStartPos_);
2028         int toIndex = tabAt(event->pos());
2029
2030         // Tell interested objects that
2031         if (fromIndex != toIndex)
2032                 tabMoveRequested(fromIndex, toIndex);
2033         event->acceptProposedAction();
2034 }
2035
2036
2037 } // namespace frontend
2038 } // namespace lyx
2039
2040 #include "moc_GuiWorkArea.cpp"