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 "LyXFunc.h"
  36 #include "LyXRC.h"
  37 #include "LyXVC.h"
  38 #include "MetricsInfo.h"
  39 #include "qt_helpers.h"
  40 #include "Text.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 <boost/bind.hpp>
  73
  74 #include <cmath>
  75
  76 #ifdef Q_WS_X11
  77 #include <QX11Info>
  78 extern "C" int XEventsQueued(Display *display, int mode);
  79 #endif
  80
  81 #ifdef Q_WS_WIN
  82 int const CursorWidth = 2;
  83 #else
  84 int const CursorWidth = 1;
  85 #endif
  86 int const TabIndicatorWidth = 3;
  87
  88 #undef KeyPress
  89 #undef NoModifier
  90
  91 using namespace std;
  92 using namespace lyx::support;
  93
  94 namespace lyx {
  95
  96
  97 /// return the LyX mouse button state from Qt's
  98 static mouse_button::state q_button_state(Qt::MouseButton button)
  99 {
 100         mouse_button::state b = mouse_button::none;
 101         switch (button) {
 102                 case Qt::LeftButton:
 103                         b = mouse_button::button1;
 104                         break;
 105                 case Qt::MidButton:
 106                         b = mouse_button::button2;
 107                         break;
 108                 case Qt::RightButton:
 109                         b = mouse_button::button3;
 110                         break;
 111                 default:
 112                         break;
 113         }
 114         return b;
 115 }
 116
 117
 118 /// return the LyX mouse button state from Qt's
 119 mouse_button::state q_motion_state(Qt::MouseButtons state)
 120 {
 121         mouse_button::state b = mouse_button::none;
 122         if (state & Qt::LeftButton)
 123                 b |= mouse_button::button1;
 124         if (state & Qt::MidButton)
 125                 b |= mouse_button::button2;
 126         if (state & Qt::RightButton)
 127                 b |= mouse_button::button3;
 128         return b;
 129 }
 130
 131
 132 namespace frontend {
 133
 134 class CursorWidget {
 135 public:
 136         CursorWidget() {}
 137
 138         void draw(QPainter & painter)
 139         {
 140                 if (!show_ || !rect_.isValid())
 141                         return;
 142
 143                 int y = rect_.top();
 144                 int l = x_ - rect_.left();
 145                 int r = rect_.right() - x_;
 146                 int bot = rect_.bottom();
 147
 148                 // draw vertica linel
 149                 painter.fillRect(x_, y, CursorWidth, rect_.height(), color_);
 150
 151                 // draw RTL/LTR indication
 152                 painter.setPen(color_);
 153                 if (l_shape_) {
 154                         if (rtl_)
 155                                 painter.drawLine(x_, bot, x_ - l, bot);
 156                         else
 157                                 painter.drawLine(x_, bot, x_ + CursorWidth + r, bot);
 158                 }
 159
 160                 // draw completion triangle
 161                 if (completable_) {
 162                         int m = y + rect_.height() / 2;
 163                         int d = TabIndicatorWidth - 1;
 164                         if (rtl_) {
 165                                 painter.drawLine(x_ - 1, m - d, x_ - 1 - d, m);
 166                                 painter.drawLine(x_ - 1, m + d, x_ - 1 - d, m);
 167                         } else {
 168                                 painter.drawLine(x_ + CursorWidth, m - d, x_ + CursorWidth + d, m);
 169                                 painter.drawLine(x_ + CursorWidth, m + d, x_ + CursorWidth + d, m);
 170                         }
 171                 }
 172         }
 173
 174         void update(int x, int y, int h, bool l_shape,
 175                 bool rtl, bool completable)
 176         {
 177                 color_ = guiApp->colorCache().get(Color_cursor);
 178                 l_shape_ = l_shape;
 179                 rtl_ = rtl;
 180                 completable_ = completable;
 181                 x_ = x;
 182
 183                 // extension to left and right
 184                 int l = 0;
 185                 int r = 0;
 186
 187                 // RTL/LTR indication
 188                 if (l_shape_) {
 189                         if (rtl)
 190                                 l += h / 3;
 191                         else
 192                                 r += h / 3;
 193                 }
 194
 195                 // completion triangle
 196                 if (completable_) {
 197                         if (rtl)
 198                                 l = max(l, TabIndicatorWidth);
 199                         else
 200                                 r = max(r, TabIndicatorWidth);
 201                 }
 202
 203                 // compute overall rectangle
 204                 rect_ = QRect(x - l, y, CursorWidth + r + l, h);
 205         }
 206
 207         void show(bool set_show = true) { show_ = set_show; }
 208         void hide() { show_ = false; }
 209
 210         QRect const & rect() { return rect_; }
 211
 212 private:
 213         /// cursor is in RTL or LTR text
 214         bool rtl_;
 215         /// indication for RTL or LTR
 216         bool l_shape_;
 217         /// triangle to show that a completion is available
 218         bool completable_;
 219         ///
 220         bool show_;
 221         ///
 222         QColor color_;
 223         /// rectangle, possibly with l_shape and completion triangle
 224         QRect rect_;
 225         /// x position (were the vertical line is drawn)
 226         int x_;
 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           x_old(-1), y_old(-1), min_scrollbar_old(-1.0), max_scrollbar_old(-1.0)
 235 {}
 236
 237
 238 GuiWorkArea::GuiWorkArea(QWidget *)
 239         : buffer_view_(0), lyx_view_(0),
 240         cursor_visible_(false),
 241         need_resize_(false), schedule_redraw_(false),
 242         preedit_lines_(1), completer_(new GuiCompleter(this))
 243 {
 244 }
 245
 246
 247 GuiWorkArea::GuiWorkArea(Buffer & buffer, GuiView & gv)
 248         : buffer_view_(0), lyx_view_(0),
 249         cursor_visible_(false),
 250         need_resize_(false), schedule_redraw_(false),
 251         preedit_lines_(1), completer_(new GuiCompleter(this))
 252 {
 253         setGuiView(gv);
 254         setBuffer(buffer);
 255         init();
 256 }
 257
 258
 259 void GuiWorkArea::init()
 260 {
 261         // Setup the signals
 262         connect(&cursor_timeout_, SIGNAL(timeout()),
 263                 this, SLOT(toggleCursor()));
 264
 265         int const time = QApplication::cursorFlashTime() / 2;
 266         if (time > 0) {
 267                 cursor_timeout_.setInterval(time);
 268                 cursor_timeout_.start();
 269         } else {
 270                 // let's initialize this just to be safe
 271                 cursor_timeout_.setInterval(500);
 272         }
 273
 274         screen_ = QPixmap(viewport()->width(), viewport()->height());
 275         // With Qt4.5 a mouse event will happen before the first paint event
 276         // so make sure that the buffer view has an up to date metrics.
 277         buffer_view_->resize(viewport()->width(), viewport()->height());
 278         cursor_ = new frontend::CursorWidget();
 279         cursor_->hide();
 280
 281         setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 282         setAcceptDrops(true);
 283         setMouseTracking(true);
 284         setMinimumSize(100, 70);
 285         setFrameStyle(QFrame::NoFrame);
 286         updateWindowTitle();
 287
 288         viewport()->setAutoFillBackground(false);
 289         // We don't need double-buffering nor SystemBackground on
 290         // the viewport because we have our own backing pixmap.
 291         viewport()->setAttribute(Qt::WA_NoSystemBackground);
 292
 293         setFocusPolicy(Qt::StrongFocus);
 294
 295         viewport()->setCursor(Qt::IBeamCursor);
 296
 297         synthetic_mouse_event_.timeout.timeout.connect(
 298                 boost::bind(&GuiWorkArea::generateSyntheticMouseEvent,
 299                                         this));
 300
 301         // Initialize the vertical Scroll Bar
 302         QObject::connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
 303                 this, SLOT(scrollTo(int)));
 304
 305         LYXERR(Debug::GUI, "viewport width: " << viewport()->width()
 306                 << "  viewport height: " << viewport()->height());
 307
 308         // Enables input methods for asian languages.
 309         // Must be set when creating custom text editing widgets.
 310         setAttribute(Qt::WA_InputMethodEnabled, true);
 311
 312         dialog_mode_ = false;
 313 }
 314
 315
 316 GuiWorkArea::~GuiWorkArea()
 317 {
 318         buffer_view_->buffer().workAreaManager().remove(this);
 319         delete buffer_view_;
 320         delete cursor_;
 321         // Completer has a QObject parent and is thus automatically destroyed.
 322         // delete completer_;
 323 }
 324
 325
 326 void GuiWorkArea::setGuiView(GuiView & gv)
 327 {
 328         lyx_view_ = &gv;
 329 }
 330
 331
 332 void GuiWorkArea::setBuffer(Buffer & buffer)
 333 {
 334         delete buffer_view_;
 335         buffer_view_ = new BufferView(buffer),
 336         buffer.workAreaManager().add(this);
 337
 338         // HACK: Prevents an additional redraw when the scrollbar pops up
 339         // which regularily happens on documents with more than one page.
 340         // The policy  should be set to "Qt::ScrollBarAsNeeded" soon.
 341         // Since we have no geometry information yet, we assume that
 342         // a document needs a scrollbar if there is more then four
 343         // paragraph in the outermost text.
 344         if (buffer.text().paragraphs().size() > 4)
 345                 setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
 346         QTimer::singleShot(50, this, SLOT(fixVerticalScrollBar()));
 347 }
 348
 349
 350 void GuiWorkArea::fixVerticalScrollBar()
 351 {
 352         if (!isFullScreen())
 353                 setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
 354 }
 355
 356
 357 void GuiWorkArea::close()
 358 {
 359         lyx_view_->removeWorkArea(this);
 360 }
 361
 362
 363 void GuiWorkArea::setFullScreen(bool full_screen)
 364 {
 365         buffer_view_->setFullScreen(full_screen);
 366         setFrameStyle(QFrame::NoFrame);
 367         if (full_screen) {
 368                 setFrameStyle(QFrame::NoFrame);
 369                 if (lyxrc.full_screen_scrollbar)
 370                         setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 371         } else
 372                 setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
 373 }
 374
 375
 376 BufferView & GuiWorkArea::bufferView()
 377 {
 378         return *buffer_view_;
 379 }
 380
 381
 382 BufferView const & GuiWorkArea::bufferView() const
 383 {
 384         return *buffer_view_;
 385 }
 386
 387
 388 void GuiWorkArea::stopBlinkingCursor()
 389 {
 390         cursor_timeout_.stop();
 391         hideCursor();
 392 }
 393
 394
 395 void GuiWorkArea::startBlinkingCursor()
 396 {
 397         showCursor();
 398         //we're not supposed to cache this value.
 399         int const time = QApplication::cursorFlashTime() / 2;
 400         if (time <= 0)
 401                 return;
 402         cursor_timeout_.setInterval(time);
 403         cursor_timeout_.start();
 404 }
 405
 406
 407 void GuiWorkArea::redraw()
 408 {
 409         if (!isVisible())
 410                 // No need to redraw in this case.
 411                 return;
 412
 413         // No need to do anything if this is the current view. The BufferView
 414         // metrics are already up to date.
 415         if (lyx_view_ != guiApp->currentView()
 416                 || lyx_view_->currentWorkArea() != this) {
 417                 // FIXME: it would be nice to optimize for the off-screen case.
 418                 buffer_view_->updateMetrics();
 419                 buffer_view_->cursor().fixIfBroken();
 420         }
 421
 422         // update cursor position, because otherwise it has to wait until
 423         // the blinking interval is over
 424         if (cursor_visible_) {
 425                 hideCursor();
 426                 showCursor();
 427         }
 428
 429         LYXERR(Debug::WORKAREA, "WorkArea::redraw screen");
 430         updateScreen();
 431         update(0, 0, viewport()->width(), viewport()->height());
 432
 433         /// \warning: scrollbar updating *must* be done after the BufferView is drawn
 434         /// because \c BufferView::updateScrollbar() is called in \c BufferView::draw().
 435         updateScrollbar();
 436         lyx_view_->updateStatusBar();
 437
 438         if (lyxerr.debugging(Debug::WORKAREA))
 439                 buffer_view_->coordCache().dump();
 440 }
 441
 442
 443 void GuiWorkArea::processKeySym(KeySymbol const & key, KeyModifier mod)
 444 {
 445         if (lyx_view_->isFullScreen() && lyx_view_->menuBar()->isVisible()
 446                 && lyxrc.full_screen_menubar) {
 447                 // FIXME HACK: we should not have to do this here. See related comment
 448                 // in GuiView::event() (QEvent::ShortcutOverride)
 449                 lyx_view_->menuBar()->hide();
 450         }
 451
 452         // In order to avoid bad surprise in the middle of an operation,
 453         // we better stop the blinking cursor...
 454         // the cursor gets restarted in GuiView::restartCursor()
 455         stopBlinkingCursor();
 456
 457         theLyXFunc().setLyXView(lyx_view_);
 458         theLyXFunc().processKeySym(key, mod);
 459 }
 460
 461
 462 void GuiWorkArea::dispatch(FuncRequest const & cmd0, KeyModifier mod)
 463 {
 464         // Handle drag&drop
 465         if (cmd0.action == LFUN_FILE_OPEN) {
 466                 lyx_view_->dispatch(cmd0);
 467                 return;
 468         }
 469
 470         theLyXFunc().setLyXView(lyx_view_);
 471
 472         FuncRequest cmd;
 473
 474         if (cmd0.action == LFUN_MOUSE_PRESS) {
 475                 if (mod == ShiftModifier)
 476                         cmd = FuncRequest(cmd0, "region-select");
 477                 else if (mod == ControlModifier)
 478                         cmd = FuncRequest(cmd0, "paragraph-select");
 479                 else
 480                         cmd = cmd0;
 481         }
 482         else
 483                 cmd = cmd0;
 484
 485         bool const notJustMovingTheMouse =
 486                 cmd.action != LFUN_MOUSE_MOTION || cmd.button() != mouse_button::none;
 487
 488         // In order to avoid bad surprise in the middle of an operation, we better stop
 489         // the blinking cursor.
 490         if (notJustMovingTheMouse)
 491                 stopBlinkingCursor();
 492
 493         buffer_view_->mouseEventDispatch(cmd);
 494
 495         // Skip these when selecting
 496         if (cmd.action != LFUN_MOUSE_MOTION) {
 497                 completer_->updateVisibility(false, false);
 498                 lyx_view_->updateDialogs();
 499                 lyx_view_->updateStatusBar();
 500         }
 501
 502         // GUI tweaks except with mouse motion with no button pressed.
 503         if (notJustMovingTheMouse) {
 504                 // Slight hack: this is only called currently when we
 505                 // clicked somewhere, so we force through the display
 506                 // of the new status here.
 507                 lyx_view_->clearMessage();
 508
 509                 // Show the cursor immediately after any operation
 510                 startBlinkingCursor();
 511         }
 512 }
 513
 514
 515 void GuiWorkArea::resizeBufferView()
 516 {
 517         // WARNING: Please don't put any code that will trigger a repaint here!
 518         // We are already inside a paint event.
 519         lyx_view_->setBusy(true);
 520         Point p;
 521         int h = 0;
 522         buffer_view_->cursorPosAndHeight(p, h);
 523         bool const cursor_in_view = buffer_view_->cursorInView(p, h);
 524         buffer_view_->resize(viewport()->width(), viewport()->height());
 525         if (cursor_in_view)
 526                 buffer_view_->scrollToCursor();
 527         updateScreen();
 528
 529         // Update scrollbars which might have changed due different
 530         // BufferView dimension. This is especially important when the
 531         // BufferView goes from zero-size to the real-size for the first time,
 532         // as the scrollbar paramters are then set for the first time.
 533         updateScrollbar();
 534
 535         lyx_view_->updateLayoutList();
 536         lyx_view_->setBusy(false);
 537         need_resize_ = false;
 538 }
 539
 540
 541 void GuiWorkArea::showCursor()
 542 {
 543         if (cursor_visible_)
 544                 return;
 545
 546         // RTL or not RTL
 547         bool l_shape = false;
 548         Font const & realfont = buffer_view_->cursor().real_current_font;
 549         BufferParams const & bp = buffer_view_->buffer().params();
 550         bool const samelang = realfont.language() == bp.language;
 551         bool const isrtl = realfont.isVisibleRightToLeft();
 552
 553         if (!samelang || isrtl != bp.language->rightToLeft())
 554                 l_shape = true;
 555
 556         // The ERT language hack needs fixing up
 557         if (realfont.language() == latex_language)
 558                 l_shape = false;
 559
 560         Point p;
 561         int h = 0;
 562         buffer_view_->cursorPosAndHeight(p, h);
 563         // show cursor on screen
 564         Cursor & cur = buffer_view_->cursor();
 565         bool completable = cur.inset().showCompletionCursor()
 566                 && completer_->completionAvailable()
 567                 && !completer_->popupVisible()
 568                 && !completer_->inlineVisible();
 569         if (buffer_view_->cursorInView(p, h)) {
 570                 cursor_visible_ = true;
 571                 showCursor(p.x_, p.y_, h, l_shape, isrtl, completable);
 572         }
 573 }
 574
 575
 576 void GuiWorkArea::hideCursor()
 577 {
 578         if (!cursor_visible_)
 579                 return;
 580
 581         cursor_visible_ = false;
 582         removeCursor();
 583 }
 584
 585
 586 void GuiWorkArea::toggleCursor()
 587 {
 588         if (cursor_visible_)
 589                 hideCursor();
 590         else
 591                 showCursor();
 592 }
 593
 594
 595 void GuiWorkArea::updateScrollbar()
 596 {
 597         ScrollbarParameters const & scroll_ = buffer_view_->scrollbarParameters();
 598         // WARNING: don't touch at the scrollbar value like this:
 599         //   verticalScrollBar()->setValue(scroll_.position);
 600         // because this would cause a recursive signal/slot calling with
 601         // GuiWorkArea::scrollTo
 602         verticalScrollBar()->setRange(scroll_.min, scroll_.max);
 603         verticalScrollBar()->setPageStep(scroll_.page_step);
 604         verticalScrollBar()->setSingleStep(scroll_.single_step);
 605         verticalScrollBar()->setSliderPosition(scroll_.position);
 606 }
 607
 608
 609 void GuiWorkArea::scrollTo(int value)
 610 {
 611         stopBlinkingCursor();
 612         buffer_view_->scrollDocView(value);
 613
 614         if (lyxrc.cursor_follows_scrollbar) {
 615                 buffer_view_->setCursorFromScrollbar();
 616                 lyx_view_->updateLayoutList();
 617         }
 618         // Show the cursor immediately after any operation.
 619         startBlinkingCursor();
 620         QApplication::syncX();
 621 }
 622
 623
 624 bool GuiWorkArea::event(QEvent * e)
 625 {
 626         switch (e->type()) {
 627         case QEvent::ToolTip: {
 628                 QHelpEvent * helpEvent = static_cast<QHelpEvent *>(e);
 629                 if (lyxrc.use_tooltip) {
 630                         QPoint pos = helpEvent->pos();
 631                         if (pos.x() < viewport()->width()) {
 632                                 QString s = toqstr(buffer_view_->toolTip(pos.x(), pos.y()));
 633                                 QToolTip::showText(helpEvent->globalPos(), s);
 634                         }
 635                         else
 636                                 QToolTip::hideText();
 637                 }
 638                 // Don't forget to accept the event!
 639                 e->accept();
 640                 return true;
 641         }
 642
 643         case QEvent::ShortcutOverride: {
 644                 // We catch this event in order to catch the Tab or Shift+Tab key press
 645                 // which are otherwise reserved to focus switching between controls
 646                 // within a dialog.
 647                 QKeyEvent * ke = static_cast<QKeyEvent*>(e);
 648                 if ((ke->key() != Qt::Key_Tab && ke->key() != Qt::Key_Backtab)
 649                         || ke->modifiers() & Qt::ControlModifier)
 650                         return QAbstractScrollArea::event(e);
 651                 keyPressEvent(ke);
 652                 return true;
 653         }
 654
 655         default:
 656                 return QAbstractScrollArea::event(e);
 657         }
 658         return false;
 659 }
 660
 661
 662 void GuiWorkArea::contextMenuEvent(QContextMenuEvent * e)
 663 {
 664         QPoint pos = e->pos();
 665         docstring name = buffer_view_->contextMenu(pos.x(), pos.y());
 666         if (name.empty()) {
 667                 QAbstractScrollArea::contextMenuEvent(e);
 668                 return;
 669         }
 670         QMenu * menu = guiApp->menus().menu(toqstr(name), *lyx_view_);
 671         if (!menu) {
 672                 QAbstractScrollArea::contextMenuEvent(e);
 673                 return;
 674         }
 675         // Position the menu to the right.
 676         // FIXME: menu position should be different for RTL text.
 677         menu->exec(e->globalPos());
 678         e->accept();
 679 }
 680
 681
 682 void GuiWorkArea::focusInEvent(QFocusEvent * e)
 683 {
 684         /*
 685         LYXERR(Debug::DEBUG, "GuiWorkArea::focusInEvent(): " << this << std::endl);
 686         GuiWorkArea * old_gwa = theGuiApp()->currentView()->currentWorkArea();
 687         if (old_gwa)
 688                 old_gwa->stopBlinkingCursor();
 689         lyx_view_->setCurrentWorkArea(this);
 690         */
 691
 692         if (lyx_view_->currentWorkArea() != this)
 693                 lyx_view_->setCurrentWorkArea(this);
 694
 695         startBlinkingCursor();
 696         QAbstractScrollArea::focusInEvent(e);
 697 }
 698
 699
 700 void GuiWorkArea::focusOutEvent(QFocusEvent * e)
 701 {
 702         LYXERR(Debug::DEBUG, "GuiWorkArea::focusOutEvent(): " << this << std::endl);
 703         stopBlinkingCursor();
 704         QAbstractScrollArea::focusOutEvent(e);
 705 }
 706
 707
 708 void GuiWorkArea::mousePressEvent(QMouseEvent * e)
 709 {
 710         if (dc_event_.active && dc_event_ == *e) {
 711                 dc_event_.active = false;
 712                 FuncRequest cmd(LFUN_MOUSE_TRIPLE, e->x(), e->y(),
 713                         q_button_state(e->button()));
 714                 dispatch(cmd);
 715                 e->accept();
 716                 return;
 717         }
 718
 719         inputContext()->reset();
 720
 721         FuncRequest const cmd(LFUN_MOUSE_PRESS, e->x(), e->y(),
 722                 q_button_state(e->button()));
 723         dispatch(cmd, q_key_state(e->modifiers()));
 724         e->accept();
 725 }
 726
 727
 728 void GuiWorkArea::mouseReleaseEvent(QMouseEvent * e)
 729 {
 730         if (synthetic_mouse_event_.timeout.running())
 731                 synthetic_mouse_event_.timeout.stop();
 732
 733         FuncRequest const cmd(LFUN_MOUSE_RELEASE, e->x(), e->y(),
 734                               q_button_state(e->button()));
 735         dispatch(cmd);
 736         e->accept();
 737 }
 738
 739
 740 void GuiWorkArea::mouseMoveEvent(QMouseEvent * e)
 741 {
 742         // we kill the triple click if we move
 743         doubleClickTimeout();
 744         FuncRequest cmd(LFUN_MOUSE_MOTION, e->x(), e->y(),
 745                 q_motion_state(e->buttons()));
 746
 747         e->accept();
 748
 749         // If we're above or below the work area...
 750         if (e->y() <= 20 || e->y() >= viewport()->height() - 20) {
 751                 // Make sure only a synthetic event can cause a page scroll,
 752                 // so they come at a steady rate:
 753                 if (e->y() <= 20)
 754                         // _Force_ a scroll up:
 755                         cmd.y = -40;
 756                 else
 757                         cmd.y = viewport()->height();
 758                 // Store the event, to be handled when the timeout expires.
 759                 synthetic_mouse_event_.cmd = cmd;
 760
 761                 if (synthetic_mouse_event_.timeout.running())
 762                         // Discard the event. Note that it _may_ be handled
 763                         // when the timeout expires if
 764                         // synthetic_mouse_event_.cmd has not been overwritten.
 765                         // Ie, when the timeout expires, we handle the
 766                         // most recent event but discard all others that
 767                         // occurred after the one used to start the timeout
 768                         // in the first place.
 769                         return;
 770
 771                 synthetic_mouse_event_.restart_timeout = true;
 772                 synthetic_mouse_event_.timeout.start();
 773                 // Fall through to handle this event...
 774
 775         } else if (synthetic_mouse_event_.timeout.running()) {
 776                 // Store the event, to be possibly handled when the timeout
 777                 // expires.
 778                 // Once the timeout has expired, normal control is returned
 779                 // to mouseMoveEvent (restart_timeout = false).
 780                 // This results in a much smoother 'feel' when moving the
 781                 // mouse back into the work area.
 782                 synthetic_mouse_event_.cmd = cmd;
 783                 synthetic_mouse_event_.restart_timeout = false;
 784                 return;
 785         }
 786
 787         // Has anything changed on-screen since the last QMouseEvent
 788         // was received?
 789         if (e->x() == synthetic_mouse_event_.x_old
 790                 && e->y() == synthetic_mouse_event_.y_old
 791                 && synthetic_mouse_event_.min_scrollbar_old == verticalScrollBar()->minimum()
 792                 && synthetic_mouse_event_.max_scrollbar_old == verticalScrollBar()->maximum()) {
 793                 // Nothing changed on-screen since the last QMouseEvent.
 794                 return;
 795         }
 796
 797         // Yes something has changed. Store the params used to check this.
 798         synthetic_mouse_event_.x_old = e->x();
 799         synthetic_mouse_event_.y_old = e->y();
 800         synthetic_mouse_event_.min_scrollbar_old = verticalScrollBar()->minimum();
 801         synthetic_mouse_event_.max_scrollbar_old = verticalScrollBar()->maximum();
 802
 803         // ... and dispatch the event to the LyX core.
 804         dispatch(cmd);
 805 }
 806
 807
 808 void GuiWorkArea::wheelEvent(QWheelEvent * ev)
 809 {
 810         // Wheel rotation by one notch results in a delta() of 120 (see
 811         // documentation of QWheelEvent)
 812         int const delta = ev->delta() / 120;
 813         if (ev->modifiers() & Qt::ControlModifier) {
 814                 docstring arg = convert<docstring>(5 * delta);
 815                 lyx::dispatch(FuncRequest(LFUN_BUFFER_ZOOM_IN, arg));
 816                 return;
 817         }
 818
 819         // Take into account the desktop wide settings.
 820         int const lines = qApp->wheelScrollLines();
 821         int const page_step = verticalScrollBar()->pageStep();
 822         // Test if the wheel mouse is set to one screen at a time.
 823         int scroll_value = lines > page_step
 824                 ? page_step : lines * verticalScrollBar()->singleStep();
 825
 826         // Take into account the rotation.
 827         scroll_value *= delta;
 828
 829         // Take into account user preference.
 830         scroll_value *= lyxrc.mouse_wheel_speed;
 831         LYXERR(Debug::SCROLLING, "wheelScrollLines = " << lines
 832                         << " delta = " << delta << " scroll_value = " << scroll_value
 833                         << " page_step = " << page_step);
 834         // Now scroll.
 835         verticalScrollBar()->setValue(verticalScrollBar()->value() - scroll_value);
 836
 837         ev->accept();
 838 }
 839
 840
 841 void GuiWorkArea::generateSyntheticMouseEvent()
 842 {
 843         // Set things off to generate the _next_ 'pseudo' event.
 844         if (synthetic_mouse_event_.restart_timeout)
 845                 synthetic_mouse_event_.timeout.start();
 846
 847         // Has anything changed on-screen since the last timeout signal
 848         // was received?
 849         int const min_scrollbar = verticalScrollBar()->minimum();
 850         int const max_scrollbar = verticalScrollBar()->maximum();
 851         if (min_scrollbar == synthetic_mouse_event_.min_scrollbar_old
 852                 && max_scrollbar == synthetic_mouse_event_.max_scrollbar_old) {
 853                 return;
 854         }
 855         // Yes it has. Store the params used to check this.
 856         synthetic_mouse_event_.min_scrollbar_old = min_scrollbar;
 857         synthetic_mouse_event_.max_scrollbar_old = max_scrollbar;
 858         // ... and dispatch the event to the LyX core.
 859         dispatch(synthetic_mouse_event_.cmd);
 860 }
 861
 862
 863 void GuiWorkArea::keyPressEvent(QKeyEvent * ev)
 864 {
 865         // Do not process here some keys if dialog_mode_ is set
 866         if (dialog_mode_
 867                 && (ev->modifiers() == Qt::NoModifier
 868                     || ev->modifiers() == Qt::ShiftModifier)
 869                 && (ev->key() == Qt::Key_Escape
 870                     || ev->key() == Qt::Key_Enter
 871                     || ev->key() == Qt::Key_Return)
 872             ) {
 873                 ev->ignore();
 874                 return;
 875         }
 876
 877         // intercept some keys if completion popup is visible
 878         if (completer_->popupVisible()) {
 879                 switch (ev->key()) {
 880                 case Qt::Key_Enter:
 881                 case Qt::Key_Return:
 882                         completer_->activate();
 883                         ev->accept();
 884                         return;
 885                 }
 886         }
 887
 888         // do nothing if there are other events
 889         // (the auto repeated events come too fast)
 890         // \todo FIXME: remove hard coded Qt keys, process the key binding
 891 #ifdef Q_WS_X11
 892         if (XEventsQueued(QX11Info::display(), 0) > 1 && ev->isAutoRepeat()
 893                         && (Qt::Key_PageDown || Qt::Key_PageUp)) {
 894                 LYXERR(Debug::KEY, "system is busy: scroll key event ignored");
 895                 ev->ignore();
 896                 return;
 897         }
 898 #endif
 899
 900         LYXERR(Debug::KEY, " count: " << ev->count() << " text: " << ev->text()
 901                 << " isAutoRepeat: " << ev->isAutoRepeat() << " key: " << ev->key());
 902
 903         KeySymbol sym;
 904         setKeySymbol(&sym, ev);
 905         if (sym.isOK()) {
 906                 processKeySym(sym, q_key_state(ev->modifiers()));
 907                 ev->accept();
 908         } else {
 909                 ev->ignore();
 910         }
 911 }
 912
 913
 914 void GuiWorkArea::doubleClickTimeout()
 915 {
 916         dc_event_.active = false;
 917 }
 918
 919
 920 void GuiWorkArea::mouseDoubleClickEvent(QMouseEvent * ev)
 921 {
 922         dc_event_ = DoubleClick(ev);
 923         QTimer::singleShot(QApplication::doubleClickInterval(), this,
 924                            SLOT(doubleClickTimeout()));
 925         FuncRequest cmd(LFUN_MOUSE_DOUBLE,
 926                         ev->x(), ev->y(),
 927                         q_button_state(ev->button()));
 928         dispatch(cmd);
 929         ev->accept();
 930 }
 931
 932
 933 void GuiWorkArea::resizeEvent(QResizeEvent * ev)
 934 {
 935         QAbstractScrollArea::resizeEvent(ev);
 936         need_resize_ = true;
 937         ev->accept();
 938 }
 939
 940
 941 void GuiWorkArea::update(int x, int y, int w, int h)
 942 {
 943         viewport()->repaint(x, y, w, h);
 944 }
 945
 946
 947 void GuiWorkArea::paintEvent(QPaintEvent * ev)
 948 {
 949         QRect const rc = ev->rect();
 950         // LYXERR(Debug::PAINTING, "paintEvent begin: x: " << rc.x()
 951         //      << " y: " << rc.y() << " w: " << rc.width() << " h: " << rc.height());
 952
 953         if (need_resize_) {
 954                 screen_ = QPixmap(viewport()->width(), viewport()->height());
 955                 resizeBufferView();
 956                 hideCursor();
 957                 showCursor();
 958         }
 959
 960         QPainter pain(viewport());
 961         pain.drawPixmap(rc, screen_, rc);
 962         cursor_->draw(pain);
 963         ev->accept();
 964 }
 965
 966
 967 void GuiWorkArea::updateScreen()
 968 {
 969         GuiPainter pain(&screen_);
 970         buffer_view_->draw(pain);
 971 }
 972
 973
 974 void GuiWorkArea::showCursor(int x, int y, int h,
 975         bool l_shape, bool rtl, bool completable)
 976 {
 977         if (schedule_redraw_) {
 978                 // This happens when a graphic conversion is finished. As we don't know
 979                 // the size of the new graphics, it's better the update everything.
 980                 // We can't use redraw() here because this would trigger a infinite
 981                 // recursive loop with showCursor().
 982                 buffer_view_->resize(viewport()->width(), viewport()->height());
 983                 updateScreen();
 984                 updateScrollbar();
 985                 viewport()->update(QRect(0, 0, viewport()->width(), viewport()->height()));
 986                 schedule_redraw_ = false;
 987                 // Show the cursor immediately after the update.
 988                 hideCursor();
 989                 toggleCursor();
 990                 return;
 991         }
 992
 993         cursor_->update(x, y, h, l_shape, rtl, completable);
 994         cursor_->show();
 995         viewport()->update(cursor_->rect());
 996 }
 997
 998
 999 void GuiWorkArea::removeCursor()
1000 {
1001         cursor_->hide();
1002         //if (!qApp->focusWidget())
1003                 viewport()->update(cursor_->rect());
1004 }
1005
1006
1007 void GuiWorkArea::inputMethodEvent(QInputMethodEvent * e)
1008 {
1009         QString const & commit_string = e->commitString();
1010         docstring const & preedit_string
1011                 = qstring_to_ucs4(e->preeditString());
1012
1013         if (!commit_string.isEmpty()) {
1014
1015                 LYXERR(Debug::KEY, "preeditString: " << e->preeditString()
1016                         << " commitString: " << e->commitString());
1017
1018                 int key = 0;
1019
1020                 // FIXME Iwami 04/01/07: we should take care also of UTF16 surrogates here.
1021                 for (int i = 0; i != commit_string.size(); ++i) {
1022                         QKeyEvent ev(QEvent::KeyPress, key, Qt::NoModifier, commit_string[i]);
1023                         keyPressEvent(&ev);
1024                 }
1025         }
1026
1027         // Hide the cursor during the kana-kanji transformation.
1028         if (preedit_string.empty())
1029                 startBlinkingCursor();
1030         else
1031                 stopBlinkingCursor();
1032
1033         // last_width : for checking if last preedit string was/wasn't empty.
1034         static bool last_width = false;
1035         if (!last_width && preedit_string.empty()) {
1036                 // if last_width is last length of preedit string.
1037                 e->accept();
1038                 return;
1039         }
1040
1041         GuiPainter pain(&screen_);
1042         buffer_view_->updateMetrics();
1043         buffer_view_->draw(pain);
1044         FontInfo font = buffer_view_->cursor().getFont().fontInfo();
1045         FontMetrics const & fm = theFontMetrics(font);
1046         int height = fm.maxHeight();
1047         int cur_x = cursor_->rect().left();
1048         int cur_y = cursor_->rect().bottom();
1049
1050         // redraw area of preedit string.
1051         update(0, cur_y - height, viewport()->width(),
1052                 (height + 1) * preedit_lines_);
1053
1054         if (preedit_string.empty()) {
1055                 last_width = false;
1056                 preedit_lines_ = 1;
1057                 e->accept();
1058                 return;
1059         }
1060         last_width = true;
1061
1062         // att : stores an IM attribute.
1063         QList<QInputMethodEvent::Attribute> const & att = e->attributes();
1064
1065         // get attributes of input method cursor.
1066         // cursor_pos : cursor position in preedit string.
1067         size_t cursor_pos = 0;
1068         bool cursor_is_visible = false;
1069         for (int i = 0; i != att.size(); ++i) {
1070                 if (att.at(i).type == QInputMethodEvent::Cursor) {
1071                         cursor_pos = att.at(i).start;
1072                         cursor_is_visible = att.at(i).length != 0;
1073                         break;
1074                 }
1075         }
1076
1077         size_t preedit_length = preedit_string.length();
1078
1079         // get position of selection in input method.
1080         // FIXME: isn't there a way to do this simplier?
1081         // rStart : cursor position in selected string in IM.
1082         size_t rStart = 0;
1083         // rLength : selected string length in IM.
1084         size_t rLength = 0;
1085         if (cursor_pos < preedit_length) {
1086                 for (int i = 0; i != att.size(); ++i) {
1087                         if (att.at(i).type == QInputMethodEvent::TextFormat) {
1088                                 if (att.at(i).start <= int(cursor_pos)
1089                                         && int(cursor_pos) < att.at(i).start + att.at(i).length) {
1090                                                 rStart = att.at(i).start;
1091                                                 rLength = att.at(i).length;
1092                                                 if (!cursor_is_visible)
1093                                                         cursor_pos += rLength;
1094                                                 break;
1095                                 }
1096                         }
1097                 }
1098         }
1099         else {
1100                 rStart = cursor_pos;
1101                 rLength = 0;
1102         }
1103
1104         int const right_margin = buffer_view_->rightMargin();
1105         Painter::preedit_style ps;
1106         // Most often there would be only one line:
1107         preedit_lines_ = 1;
1108         for (size_t pos = 0; pos != preedit_length; ++pos) {
1109                 char_type const typed_char = preedit_string[pos];
1110                 // reset preedit string style
1111                 ps = Painter::preedit_default;
1112
1113                 // if we reached the right extremity of the screen, go to next line.
1114                 if (cur_x + fm.width(typed_char) > viewport()->width() - right_margin) {
1115                         cur_x = right_margin;
1116                         cur_y += height + 1;
1117                         ++preedit_lines_;
1118                 }
1119                 // preedit strings are displayed with dashed underline
1120                 // and partial strings are displayed white on black indicating
1121                 // that we are in selecting mode in the input method.
1122                 // FIXME: rLength == preedit_length is not a changing condition
1123                 // FIXME: should be put out of the loop.
1124                 if (pos >= rStart
1125                         && pos < rStart + rLength
1126                         && !(cursor_pos < rLength && rLength == preedit_length))
1127                         ps = Painter::preedit_selecting;
1128
1129                 if (pos == cursor_pos
1130                         && (cursor_pos < rLength && rLength == preedit_length))
1131                         ps = Painter::preedit_cursor;
1132
1133                 // draw one character and update cur_x.
1134                 cur_x += pain.preeditText(cur_x, cur_y, typed_char, font, ps);
1135         }
1136
1137         // update the preedit string screen area.
1138         update(0, cur_y - preedit_lines_*height, viewport()->width(),
1139                 (height + 1) * preedit_lines_);
1140
1141         // Don't forget to accept the event!
1142         e->accept();
1143 }
1144
1145
1146 QVariant GuiWorkArea::inputMethodQuery(Qt::InputMethodQuery query) const
1147 {
1148         QRect cur_r(0, 0, 0, 0);
1149         switch (query) {
1150                 // this is the CJK-specific composition window position.
1151                 case Qt::ImMicroFocus:
1152                         cur_r = cursor_->rect();
1153                         if (preedit_lines_ != 1)
1154                                 cur_r.moveLeft(10);
1155                         cur_r.moveBottom(cur_r.bottom() + cur_r.height() * preedit_lines_);
1156                         // return lower right of cursor in LyX.
1157                         return cur_r;
1158                 default:
1159                         return QWidget::inputMethodQuery(query);
1160         }
1161 }
1162
1163
1164 void GuiWorkArea::updateWindowTitle()
1165 {
1166         docstring maximize_title;
1167         docstring minimize_title;
1168
1169         Buffer & buf = buffer_view_->buffer();
1170         FileName const fileName = buf.fileName();
1171         if (!fileName.empty()) {
1172                 maximize_title = fileName.displayName(30);
1173                 minimize_title = from_utf8(fileName.onlyFileName());
1174                 if (buf.lyxvc().inUse()) {
1175                         if (buf.lyxvc().locker().empty())
1176                                 maximize_title +=  _(" (version control)");
1177                         else
1178                                 maximize_title +=  _(" (version control, locking)");
1179                 }
1180                 if (!buf.isClean()) {
1181                         maximize_title += _(" (changed)");
1182                         minimize_title += char_type('*');
1183                 }
1184                 if (buf.isReadonly())
1185                         maximize_title += _(" (read only)");
1186         }
1187
1188         QString title = windowTitle();
1189         QString new_title = toqstr(maximize_title);
1190         if (title == new_title)
1191                 return;
1192
1193         QWidget::setWindowTitle(new_title);
1194         QWidget::setWindowIconText(toqstr(minimize_title));
1195         titleChanged(this);
1196 }
1197
1198
1199 void GuiWorkArea::setReadOnly(bool)
1200 {
1201         updateWindowTitle();
1202         if (this == lyx_view_->currentWorkArea())
1203                 lyx_view_->updateDialogs();
1204 }
1205
1206
1207 bool GuiWorkArea::isFullScreen()
1208 {
1209         return lyx_view_ && lyx_view_->isFullScreen();
1210 }
1211
1212
1213 ////////////////////////////////////////////////////////////////////
1214 //
1215 // EmbeddedWorkArea
1216 //
1217 ////////////////////////////////////////////////////////////////////
1218
1219
1220 EmbeddedWorkArea::EmbeddedWorkArea(QWidget * w): GuiWorkArea(w)
1221 {
1222         buffer_ = theBufferList().newBuffer(
1223                 support::FileName::tempName().absFilename() + "_embedded.internal");
1224         buffer_->setUnnamed(true);
1225         buffer_->setFullyLoaded(true);
1226         setBuffer(*buffer_);
1227         setDialogMode(true);
1228 }
1229
1230
1231 EmbeddedWorkArea::~EmbeddedWorkArea()
1232 {
1233         // No need to destroy buffer and bufferview here, because it is done
1234         // in theBuffeerList() destruction loop at application exit
1235 }
1236
1237
1238 void EmbeddedWorkArea::closeEvent(QCloseEvent * ev)
1239 {
1240         disable();
1241         GuiWorkArea::closeEvent(ev);
1242 }
1243
1244
1245 void EmbeddedWorkArea::hideEvent(QHideEvent * ev)
1246 {
1247         disable();
1248         GuiWorkArea::hideEvent(ev);
1249 }
1250
1251
1252 void EmbeddedWorkArea::disable()
1253 {
1254         stopBlinkingCursor();
1255         if (view().currentWorkArea() != this)
1256                 return;
1257         LASSERT(view().currentMainWorkArea(), /* */);
1258         view().setCurrentWorkArea(view().currentMainWorkArea());
1259 }
1260
1261 ////////////////////////////////////////////////////////////////////
1262 //
1263 // TabWorkArea
1264 //
1265 ////////////////////////////////////////////////////////////////////
1266
1267 #ifdef Q_WS_MACX
1268 class NoTabFrameMacStyle : public QMacStyle {
1269 public:
1270         ///
1271         QRect subElementRect(SubElement element, const QStyleOption * option,
1272                              const QWidget * widget = 0) const
1273         {
1274                 QRect rect = QMacStyle::subElementRect(element, option, widget);
1275                 bool noBar = static_cast<QTabWidget const *>(widget)->count() <= 1;
1276
1277                 // The Qt Mac style puts the contents into a 3 pixel wide box
1278                 // which looks very ugly and not like other Mac applications.
1279                 // Hence we remove this here, and moreover the 16 pixel round
1280                 // frame above if the tab bar is hidden.
1281                 if (element == QStyle::SE_TabWidgetTabContents) {
1282                         rect.adjust(- rect.left(), 0, rect.left(), 0);
1283                         if (noBar)
1284                                 rect.setTop(0);
1285                 }
1286
1287                 return rect;
1288         }
1289 };
1290
1291 NoTabFrameMacStyle noTabFrameMacStyle;
1292 #endif
1293
1294
1295 TabWorkArea::TabWorkArea(QWidget * parent)
1296         : QTabWidget(parent), clicked_tab_(-1)
1297 {
1298 #ifdef Q_WS_MACX
1299         setStyle(&noTabFrameMacStyle);
1300 #endif
1301
1302         QPalette pal = palette();
1303         pal.setColor(QPalette::Active, QPalette::Button,
1304                 pal.color(QPalette::Active, QPalette::Window));
1305         pal.setColor(QPalette::Disabled, QPalette::Button,
1306                 pal.color(QPalette::Disabled, QPalette::Window));
1307         pal.setColor(QPalette::Inactive, QPalette::Button,
1308                 pal.color(QPalette::Inactive, QPalette::Window));
1309
1310         QObject::connect(this, SIGNAL(currentChanged(int)),
1311                 this, SLOT(on_currentTabChanged(int)));
1312
1313 #if QT_VERSION < 0x040500
1314         closeBufferButton = new QToolButton(this);
1315         closeBufferButton->setPalette(pal);
1316         // FIXME: rename the icon to closebuffer.png
1317         closeBufferButton->setIcon(QIcon(getPixmap("images/", "closetab", "png")));
1318         closeBufferButton->setText("Close File");
1319         closeBufferButton->setAutoRaise(true);
1320         closeBufferButton->setCursor(Qt::ArrowCursor);
1321         closeBufferButton->setToolTip(qt_("Close File"));
1322         closeBufferButton->setEnabled(true);
1323         QObject::connect(closeBufferButton, SIGNAL(clicked()),
1324                 this, SLOT(closeCurrentBuffer()));
1325         setCornerWidget(closeBufferButton, Qt::TopRightCorner);
1326 #endif
1327
1328         // setup drag'n'drop
1329         QTabBar* tb = new DragTabBar;
1330         connect(tb, SIGNAL(tabMoveRequested(int, int)),
1331                 this, SLOT(moveTab(int, int)));
1332         tb->setElideMode(Qt::ElideNone);
1333         setTabBar(tb);
1334
1335         // make us responsible for the context menu of the tabbar
1336         tb->setContextMenuPolicy(Qt::CustomContextMenu);
1337         connect(tb, SIGNAL(customContextMenuRequested(const QPoint &)),
1338                 this, SLOT(showContextMenu(const QPoint &)));
1339 #if QT_VERSION >= 0x040500
1340         connect(tb, SIGNAL(tabCloseRequested(int)),
1341                 tb, SLOT(on_tabCloseRequested(int)));
1342 #endif
1343
1344         setUsesScrollButtons(true);
1345 }
1346
1347
1348 void TabWorkArea::setFullScreen(bool full_screen)
1349 {
1350         for (int i = 0; i != count(); ++i) {
1351                 if (GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i)))
1352                         wa->setFullScreen(full_screen);
1353         }
1354
1355         if (lyxrc.full_screen_tabbar)
1356                 showBar(!full_screen && count() > 1);
1357 }
1358
1359
1360 void TabWorkArea::showBar(bool show)
1361 {
1362         tabBar()->setEnabled(show);
1363         tabBar()->setVisible(show);
1364 #if QT_VERSION < 0x040500
1365         closeBufferButton->setVisible(show);
1366 #endif
1367 }
1368
1369
1370 GuiWorkArea * TabWorkArea::currentWorkArea()
1371 {
1372         if (count() == 0)
1373                 return 0;
1374
1375         GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(currentWidget());
1376         LASSERT(wa, /**/);
1377         return wa;
1378 }
1379
1380
1381 GuiWorkArea * TabWorkArea::workArea(Buffer & buffer)
1382 {
1383         for (int i = 0; i != count(); ++i) {
1384                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1385                 LASSERT(wa, return 0);
1386                 if (&wa->bufferView().buffer() == &buffer)
1387                         return wa;
1388         }
1389         return 0;
1390 }
1391
1392
1393 void TabWorkArea::closeAll()
1394 {
1395         while (count()) {
1396                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(0));
1397                 LASSERT(wa, /**/);
1398                 removeTab(0);
1399                 delete wa;
1400         }
1401 }
1402
1403
1404 bool TabWorkArea::setCurrentWorkArea(GuiWorkArea * work_area)
1405 {
1406         LASSERT(work_area, /**/);
1407         int index = indexOf(work_area);
1408         if (index == -1)
1409                 return false;
1410
1411         if (index == currentIndex())
1412                 // Make sure the work area is up to date.
1413                 on_currentTabChanged(index);
1414         else
1415                 // Switch to the work area.
1416                 setCurrentIndex(index);
1417         work_area->setFocus();
1418
1419         return true;
1420 }
1421
1422
1423 GuiWorkArea * TabWorkArea::addWorkArea(Buffer & buffer, GuiView & view)
1424 {
1425         GuiWorkArea * wa = new GuiWorkArea(buffer, view);
1426         wa->setUpdatesEnabled(false);
1427         // Hide tabbar if there's no tab (avoid a resize and a flashing tabbar
1428         // when hiding it again below).
1429         if (!(currentWorkArea() && currentWorkArea()->isFullScreen()))
1430                 showBar(count() > 0);
1431         addTab(wa, wa->windowTitle());
1432         QObject::connect(wa, SIGNAL(titleChanged(GuiWorkArea *)),
1433                 this, SLOT(updateTabTexts()));
1434         if (currentWorkArea() && currentWorkArea()->isFullScreen())
1435                 setFullScreen(true);
1436         else
1437                 // Hide tabbar if there's only one tab.
1438                 showBar(count() > 1);
1439
1440         updateTabTexts();
1441
1442         return wa;
1443 }
1444
1445
1446 bool TabWorkArea::removeWorkArea(GuiWorkArea * work_area)
1447 {
1448         LASSERT(work_area, return false);
1449         int index = indexOf(work_area);
1450         if (index == -1)
1451                 return false;
1452
1453         work_area->setUpdatesEnabled(false);
1454         removeTab(index);
1455         delete work_area;
1456
1457         if (count()) {
1458                 // make sure the next work area is enabled.
1459                 currentWidget()->setUpdatesEnabled(true);
1460                 if (currentWorkArea() && currentWorkArea()->isFullScreen())
1461                         setFullScreen(true);
1462                 else
1463                         // Show tabbar only if there's more than one tab.
1464                         showBar(count() > 1);
1465         } else
1466                 lastWorkAreaRemoved();
1467
1468         updateTabTexts();
1469
1470         return true;
1471 }
1472
1473
1474 void TabWorkArea::on_currentTabChanged(int i)
1475 {
1476         // returns e.g. on application destruction
1477         if (i == -1)
1478                 return;
1479         GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1480         LASSERT(wa, return);
1481         BufferView & bv = wa->bufferView();
1482         bv.cursor().fixIfBroken();
1483         bv.updateMetrics();
1484         wa->setUpdatesEnabled(true);
1485         wa->redraw();
1486         wa->setFocus();
1487         ///
1488         currentWorkAreaChanged(wa);
1489
1490         LYXERR(Debug::GUI, "currentTabChanged " << i
1491                 << "File" << bv.buffer().absFileName());
1492 }
1493
1494
1495 void TabWorkArea::closeCurrentBuffer()
1496 {
1497         if (clicked_tab_ != -1)
1498                 setCurrentIndex(clicked_tab_);
1499         else
1500                 // Before dispatching the LFUN we should be sure this
1501                 // is the current workarea.
1502                 currentWorkAreaChanged(currentWorkArea());
1503
1504         lyx::dispatch(FuncRequest(LFUN_BUFFER_CLOSE));
1505 }
1506
1507
1508 void TabWorkArea::closeCurrentTab()
1509 {
1510         if (clicked_tab_ == -1)
1511                 removeWorkArea(currentWorkArea());
1512         else {
1513                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(clicked_tab_));
1514                 LASSERT(wa, /**/);
1515                 removeWorkArea(wa);
1516         }
1517 }
1518
1519 ///
1520 class DisplayPath {
1521 public:
1522         /// make vector happy
1523         DisplayPath() {}
1524         ///
1525         DisplayPath(int tab, FileName const & filename)
1526                 : tab_(tab)
1527         {
1528                 filename_ = toqstr(filename.onlyFileNameWithoutExt());
1529                 postfix_ = toqstr(filename.absoluteFilePath()).
1530                         split("/", QString::SkipEmptyParts);
1531                 postfix_.pop_back();
1532                 abs_ = toqstr(filename.absoluteFilePath());
1533                 dottedPrefix_ = false;
1534         }
1535
1536         /// Absolute path for debugging.
1537         QString abs() const
1538         {
1539                 return abs_;
1540         }
1541         /// Add the first segment from the postfix or three dots to the prefix.
1542         /// Merge multiple dot tripples. In fact dots are added lazily, i.e. only
1543         /// when really needed.
1544         void shiftPathSegment(bool dotted)
1545         {
1546                 if (postfix_.count() <= 0)
1547                         return;
1548
1549                 if (!dotted) {
1550                         if (dottedPrefix_ && !prefix_.isEmpty())
1551                                 prefix_ += ".../";
1552                         prefix_ += postfix_.front() + "/";
1553                 }
1554                 dottedPrefix_ = dotted && !prefix_.isEmpty();
1555                 postfix_.pop_front();
1556         }
1557         ///
1558         QString displayString() const
1559         {
1560                 if (prefix_.isEmpty())
1561                         return filename_;
1562
1563                 bool dots = dottedPrefix_ || !postfix_.isEmpty();
1564                 return prefix_ + (dots ? ".../" : "") + filename_;
1565         }
1566         ///
1567         QString forecastPathString() const
1568         {
1569                 if (postfix_.count() == 0)
1570                         return displayString();
1571
1572                 return prefix_
1573                         + (dottedPrefix_ ? ".../" : "")
1574                         + postfix_.front() + "/";
1575         }
1576         ///
1577         bool final() const { return postfix_.empty(); }
1578         ///
1579         int tab() const { return tab_; }
1580
1581 private:
1582         ///
1583         QString prefix_;
1584         ///
1585         QStringList postfix_;
1586         ///
1587         QString filename_;
1588         ///
1589         QString abs_;
1590         ///
1591         int tab_;
1592         ///
1593         bool dottedPrefix_;
1594 };
1595
1596
1597 ///
1598 bool operator<(DisplayPath const & a, DisplayPath const & b)
1599 {
1600         return a.displayString() < b.displayString();
1601 }
1602
1603 ///
1604 bool operator==(DisplayPath const & a, DisplayPath const & b)
1605 {
1606         return a.displayString() == b.displayString();
1607 }
1608
1609
1610 void TabWorkArea::updateTabTexts()
1611 {
1612         size_t n = count();
1613         if (n == 0)
1614                 return;
1615         std::list<DisplayPath> paths;
1616         typedef std::list<DisplayPath>::iterator It;
1617
1618         // collect full names first: path into postfix, empty prefix and
1619         // filename without extension
1620         for (size_t i = 0; i < n; ++i) {
1621                 GuiWorkArea * i_wa = dynamic_cast<GuiWorkArea *>(widget(i));
1622                 FileName const fn = i_wa->bufferView().buffer().fileName();
1623                 paths.push_back(DisplayPath(i, fn));
1624         }
1625
1626         // go through path segments and see if it helps to make the path more unique
1627         bool somethingChanged = true;
1628         bool allFinal = false;
1629         while (somethingChanged && !allFinal) {
1630                 // adding path segments changes order
1631                 paths.sort();
1632
1633                 LYXERR(Debug::GUI, "updateTabTexts() iteration start");
1634                 somethingChanged = false;
1635                 allFinal = true;
1636
1637                 // find segments which are not unique (i.e. non-atomic)
1638                 It it = paths.begin();
1639                 It segStart = it;
1640                 QString segString = it->displayString();
1641                 for (; it != paths.end(); ++it) {
1642                         // look to the next item
1643                         It next = it;
1644                         ++next;
1645
1646                         // final?
1647                         allFinal = allFinal && it->final();
1648
1649                         LYXERR(Debug::GUI, "it = " << it->abs()
1650                                << " => " << it->displayString());
1651
1652                         // still the same segment?
1653                         QString nextString;
1654                         if ((next != paths.end()
1655                              && (nextString = next->displayString()) == segString))
1656                                 continue;
1657                         LYXERR(Debug::GUI, "segment ended");
1658
1659                         // only a trivial one with one element?
1660                         if (it == segStart) {
1661                                 // start new segment
1662                                 segStart = next;
1663                                 segString = nextString;
1664                                 continue;
1665                         }
1666
1667                         // we found a non-atomic segment segStart <= sit <= it < next.
1668                         // Shift path segments and hope for the best
1669                         // that it makes the path more unique.
1670                         somethingChanged = true;
1671                         It sit = segStart;
1672                         QString dspString = sit->forecastPathString();
1673                         LYXERR(Debug::GUI, "first forecast found for "
1674                                << sit->abs() << " => " << dspString);
1675                         ++sit;
1676                         bool moreUnique = false;
1677                         for (; sit != next; ++sit) {
1678                                 if (sit->forecastPathString() != dspString) {
1679                                         LYXERR(Debug::GUI, "different forecast found for "
1680                                                 << sit->abs() << " => " << sit->forecastPathString());
1681                                         moreUnique = true;
1682                                         break;
1683                                 }
1684                                 LYXERR(Debug::GUI, "same forecast found for "
1685                                         << sit->abs() << " => " << dspString);
1686                         }
1687
1688                         // if the path segment helped, add it. Otherwise add dots
1689                         bool dots = !moreUnique;
1690                         LYXERR(Debug::GUI, "using dots = " << dots);
1691                         for (sit = segStart; sit != next; ++sit) {
1692                                 sit->shiftPathSegment(dots);
1693                                 LYXERR(Debug::GUI, "shifting "
1694                                         << sit->abs() << " => " << sit->displayString());
1695                         }
1696
1697                         // start new segment
1698                         segStart = next;
1699                         segString = nextString;
1700                 }
1701         }
1702
1703         // set new tab titles
1704         for (It it = paths.begin(); it != paths.end(); ++it) {
1705                 GuiWorkArea * i_wa = dynamic_cast<GuiWorkArea *>(widget(it->tab()));
1706                 Buffer & buf = i_wa->bufferView().buffer();
1707                 if (!buf.fileName().empty() && !buf.isClean())
1708                         setTabText(it->tab(), it->displayString() + "*");
1709                 else
1710                         setTabText(it->tab(), it->displayString());
1711         }
1712 }
1713
1714
1715 void TabWorkArea::showContextMenu(const QPoint & pos)
1716 {
1717         // which tab?
1718         clicked_tab_ = static_cast<DragTabBar *>(tabBar())->tabAt(pos);
1719         if (clicked_tab_ == -1)
1720                 return;
1721
1722         // show tab popup
1723         QMenu popup;
1724         popup.addAction(QIcon(getPixmap("images/", "hidetab", "png")),
1725                 qt_("Hide tab"), this, SLOT(closeCurrentTab()));
1726         popup.addAction(QIcon(getPixmap("images/", "closetab", "png")),
1727                 qt_("Close tab"), this, SLOT(closeCurrentBuffer()));
1728         popup.exec(tabBar()->mapToGlobal(pos));
1729
1730         clicked_tab_ = -1;
1731 }
1732
1733
1734 void TabWorkArea::moveTab(int fromIndex, int toIndex)
1735 {
1736         QWidget * w = widget(fromIndex);
1737         QIcon icon = tabIcon(fromIndex);
1738         QString text = tabText(fromIndex);
1739
1740         setCurrentIndex(fromIndex);
1741         removeTab(fromIndex);
1742         insertTab(toIndex, w, icon, text);
1743         setCurrentIndex(toIndex);
1744 }
1745
1746
1747 DragTabBar::DragTabBar(QWidget* parent)
1748         : QTabBar(parent)
1749 {
1750         setAcceptDrops(true);
1751 #if QT_VERSION >= 0x040500
1752         setTabsClosable(true);
1753 #endif
1754 }
1755
1756
1757 void DragTabBar::on_tabCloseRequested(int index)
1758 {
1759         setCurrentIndex(index);
1760         lyx::dispatch(FuncRequest(LFUN_BUFFER_CLOSE));
1761 }
1762
1763
1764 #if QT_VERSION < 0x040300
1765 int DragTabBar::tabAt(QPoint const & position) const
1766 {
1767         const int max = count();
1768         for (int i = 0; i < max; ++i) {
1769                 if (tabRect(i).contains(position))
1770                         return i;
1771         }
1772         return -1;
1773 }
1774 #endif
1775
1776
1777 void DragTabBar::mousePressEvent(QMouseEvent * event)
1778 {
1779         if (event->button() == Qt::LeftButton)
1780                 dragStartPos_ = event->pos();
1781         QTabBar::mousePressEvent(event);
1782 }
1783
1784
1785 void DragTabBar::mouseMoveEvent(QMouseEvent * event)
1786 {
1787         // If the left button isn't pressed anymore then return
1788         if (!(event->buttons() & Qt::LeftButton))
1789                 return;
1790
1791         // If the distance is too small then return
1792         if ((event->pos() - dragStartPos_).manhattanLength()
1793             < QApplication::startDragDistance())
1794                 return;
1795
1796         // did we hit something after all?
1797         int tab = tabAt(dragStartPos_);
1798         if (tab == -1)
1799                 return;
1800
1801         // simulate button release to remove highlight from button
1802         int i = currentIndex();
1803         QMouseEvent me(QEvent::MouseButtonRelease, dragStartPos_,
1804                 event->button(), event->buttons(), 0);
1805         QTabBar::mouseReleaseEvent(&me);
1806         setCurrentIndex(i);
1807
1808         // initiate Drag
1809         QDrag * drag = new QDrag(this);
1810         QMimeData * mimeData = new QMimeData;
1811         // a crude way to distinguish tab-reodering drops from other ones
1812         mimeData->setData("action", "tab-reordering") ;
1813         drag->setMimeData(mimeData);
1814
1815 #if QT_VERSION >= 0x040300
1816         // get tab pixmap as cursor
1817         QRect r = tabRect(tab);
1818         QPixmap pixmap(r.size());
1819         render(&pixmap, - r.topLeft());
1820         drag->setPixmap(pixmap);
1821         drag->exec();
1822 #else
1823         drag->start(Qt::MoveAction);
1824 #endif
1825
1826 }
1827
1828
1829 void DragTabBar::dragEnterEvent(QDragEnterEvent * event)
1830 {
1831         // Only accept if it's an tab-reordering request
1832         QMimeData const * m = event->mimeData();
1833         QStringList formats = m->formats();
1834         if (formats.contains("action")
1835             && m->data("action") == "tab-reordering")
1836                 event->acceptProposedAction();
1837 }
1838
1839
1840 void DragTabBar::dropEvent(QDropEvent * event)
1841 {
1842         int fromIndex = tabAt(dragStartPos_);
1843         int toIndex = tabAt(event->pos());
1844
1845         // Tell interested objects that
1846         if (fromIndex != toIndex)
1847                 tabMoveRequested(fromIndex, toIndex);
1848         event->acceptProposedAction();
1849 }
1850
1851
1852 } // namespace frontend
1853 } // namespace lyx
1854
1855 #include "moc_GuiWorkArea.cpp"