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         Cursor const & cur = buffer_view_->cursor();
 666         if (e->reason() == QContextMenuEvent::Keyboard && cur.inTexted()) {
 667                 // Do not access the context menu of math right in front of before
 668                 // the cursor. This does not work when the cursor is in text.
 669                 Inset * inset = cur.paragraph().getInset(cur.pos());
 670                 if (inset && inset->asInsetMath())
 671                         --pos.rx();
 672                 else if (cur.pos() > 0) {
 673                         Inset * inset = cur.paragraph().getInset(cur.pos() - 1);
 674                         if (inset)
 675                                 ++pos.rx();
 676                 }
 677         }
 678         docstring name = buffer_view_->contextMenu(pos.x(), pos.y());
 679         if (name.empty()) {
 680                 QAbstractScrollArea::contextMenuEvent(e);
 681                 return;
 682         }
 683         QMenu * menu = guiApp->menus().menu(toqstr(name), *lyx_view_);
 684         if (!menu) {
 685                 QAbstractScrollArea::contextMenuEvent(e);
 686                 return;
 687         }
 688         // Position the menu to the right.
 689         // FIXME: menu position should be different for RTL text.
 690         menu->exec(e->globalPos());
 691         e->accept();
 692 }
 693
 694
 695 void GuiWorkArea::focusInEvent(QFocusEvent * e)
 696 {
 697         /*
 698         LYXERR(Debug::DEBUG, "GuiWorkArea::focusInEvent(): " << this << std::endl);
 699         GuiWorkArea * old_gwa = theGuiApp()->currentView()->currentWorkArea();
 700         if (old_gwa)
 701                 old_gwa->stopBlinkingCursor();
 702         lyx_view_->setCurrentWorkArea(this);
 703         */
 704
 705         if (lyx_view_->currentWorkArea() != this)
 706                 lyx_view_->setCurrentWorkArea(this);
 707
 708         startBlinkingCursor();
 709         QAbstractScrollArea::focusInEvent(e);
 710 }
 711
 712
 713 void GuiWorkArea::focusOutEvent(QFocusEvent * e)
 714 {
 715         LYXERR(Debug::DEBUG, "GuiWorkArea::focusOutEvent(): " << this << std::endl);
 716         stopBlinkingCursor();
 717         QAbstractScrollArea::focusOutEvent(e);
 718 }
 719
 720
 721 void GuiWorkArea::mousePressEvent(QMouseEvent * e)
 722 {
 723         if (dc_event_.active && dc_event_ == *e) {
 724                 dc_event_.active = false;
 725                 FuncRequest cmd(LFUN_MOUSE_TRIPLE, e->x(), e->y(),
 726                         q_button_state(e->button()));
 727                 dispatch(cmd);
 728                 e->accept();
 729                 return;
 730         }
 731
 732         inputContext()->reset();
 733
 734         FuncRequest const cmd(LFUN_MOUSE_PRESS, e->x(), e->y(),
 735                 q_button_state(e->button()));
 736         dispatch(cmd, q_key_state(e->modifiers()));
 737         e->accept();
 738 }
 739
 740
 741 void GuiWorkArea::mouseReleaseEvent(QMouseEvent * e)
 742 {
 743         if (synthetic_mouse_event_.timeout.running())
 744                 synthetic_mouse_event_.timeout.stop();
 745
 746         FuncRequest const cmd(LFUN_MOUSE_RELEASE, e->x(), e->y(),
 747                               q_button_state(e->button()));
 748         dispatch(cmd);
 749         e->accept();
 750 }
 751
 752
 753 void GuiWorkArea::mouseMoveEvent(QMouseEvent * e)
 754 {
 755         // we kill the triple click if we move
 756         doubleClickTimeout();
 757         FuncRequest cmd(LFUN_MOUSE_MOTION, e->x(), e->y(),
 758                 q_motion_state(e->buttons()));
 759
 760         e->accept();
 761
 762         // If we're above or below the work area...
 763         if (e->y() <= 20 || e->y() >= viewport()->height() - 20) {
 764                 // Make sure only a synthetic event can cause a page scroll,
 765                 // so they come at a steady rate:
 766                 if (e->y() <= 20)
 767                         // _Force_ a scroll up:
 768                         cmd.y = -40;
 769                 else
 770                         cmd.y = viewport()->height();
 771                 // Store the event, to be handled when the timeout expires.
 772                 synthetic_mouse_event_.cmd = cmd;
 773
 774                 if (synthetic_mouse_event_.timeout.running())
 775                         // Discard the event. Note that it _may_ be handled
 776                         // when the timeout expires if
 777                         // synthetic_mouse_event_.cmd has not been overwritten.
 778                         // Ie, when the timeout expires, we handle the
 779                         // most recent event but discard all others that
 780                         // occurred after the one used to start the timeout
 781                         // in the first place.
 782                         return;
 783
 784                 synthetic_mouse_event_.restart_timeout = true;
 785                 synthetic_mouse_event_.timeout.start();
 786                 // Fall through to handle this event...
 787
 788         } else if (synthetic_mouse_event_.timeout.running()) {
 789                 // Store the event, to be possibly handled when the timeout
 790                 // expires.
 791                 // Once the timeout has expired, normal control is returned
 792                 // to mouseMoveEvent (restart_timeout = false).
 793                 // This results in a much smoother 'feel' when moving the
 794                 // mouse back into the work area.
 795                 synthetic_mouse_event_.cmd = cmd;
 796                 synthetic_mouse_event_.restart_timeout = false;
 797                 return;
 798         }
 799
 800         // Has anything changed on-screen since the last QMouseEvent
 801         // was received?
 802         if (e->x() == synthetic_mouse_event_.x_old
 803                 && e->y() == synthetic_mouse_event_.y_old
 804                 && synthetic_mouse_event_.min_scrollbar_old == verticalScrollBar()->minimum()
 805                 && synthetic_mouse_event_.max_scrollbar_old == verticalScrollBar()->maximum()) {
 806                 // Nothing changed on-screen since the last QMouseEvent.
 807                 return;
 808         }
 809
 810         // Yes something has changed. Store the params used to check this.
 811         synthetic_mouse_event_.x_old = e->x();
 812         synthetic_mouse_event_.y_old = e->y();
 813         synthetic_mouse_event_.min_scrollbar_old = verticalScrollBar()->minimum();
 814         synthetic_mouse_event_.max_scrollbar_old = verticalScrollBar()->maximum();
 815
 816         // ... and dispatch the event to the LyX core.
 817         dispatch(cmd);
 818 }
 819
 820
 821 void GuiWorkArea::wheelEvent(QWheelEvent * ev)
 822 {
 823         // Wheel rotation by one notch results in a delta() of 120 (see
 824         // documentation of QWheelEvent)
 825         int const delta = ev->delta() / 120;
 826         if (ev->modifiers() & Qt::ControlModifier) {
 827                 docstring arg = convert<docstring>(5 * delta);
 828                 lyx::dispatch(FuncRequest(LFUN_BUFFER_ZOOM_IN, arg));
 829                 return;
 830         }
 831
 832         // Take into account the desktop wide settings.
 833         int const lines = qApp->wheelScrollLines();
 834         int const page_step = verticalScrollBar()->pageStep();
 835         // Test if the wheel mouse is set to one screen at a time.
 836         int scroll_value = lines > page_step
 837                 ? page_step : lines * verticalScrollBar()->singleStep();
 838
 839         // Take into account the rotation.
 840         scroll_value *= delta;
 841
 842         // Take into account user preference.
 843         scroll_value *= lyxrc.mouse_wheel_speed;
 844         LYXERR(Debug::SCROLLING, "wheelScrollLines = " << lines
 845                         << " delta = " << delta << " scroll_value = " << scroll_value
 846                         << " page_step = " << page_step);
 847         // Now scroll.
 848         verticalScrollBar()->setValue(verticalScrollBar()->value() - scroll_value);
 849
 850         ev->accept();
 851 }
 852
 853
 854 void GuiWorkArea::generateSyntheticMouseEvent()
 855 {
 856         // Set things off to generate the _next_ 'pseudo' event.
 857         if (synthetic_mouse_event_.restart_timeout)
 858                 synthetic_mouse_event_.timeout.start();
 859
 860         // Has anything changed on-screen since the last timeout signal
 861         // was received?
 862         int const min_scrollbar = verticalScrollBar()->minimum();
 863         int const max_scrollbar = verticalScrollBar()->maximum();
 864         if (min_scrollbar == synthetic_mouse_event_.min_scrollbar_old
 865                 && max_scrollbar == synthetic_mouse_event_.max_scrollbar_old) {
 866                 return;
 867         }
 868         // Yes it has. Store the params used to check this.
 869         synthetic_mouse_event_.min_scrollbar_old = min_scrollbar;
 870         synthetic_mouse_event_.max_scrollbar_old = max_scrollbar;
 871         // ... and dispatch the event to the LyX core.
 872         dispatch(synthetic_mouse_event_.cmd);
 873 }
 874
 875
 876 void GuiWorkArea::keyPressEvent(QKeyEvent * ev)
 877 {
 878         // Do not process here some keys if dialog_mode_ is set
 879         if (dialog_mode_
 880                 && (ev->modifiers() == Qt::NoModifier
 881                     || ev->modifiers() == Qt::ShiftModifier)
 882                 && (ev->key() == Qt::Key_Escape
 883                     || ev->key() == Qt::Key_Enter
 884                     || ev->key() == Qt::Key_Return)
 885             ) {
 886                 ev->ignore();
 887                 return;
 888         }
 889
 890         // intercept some keys if completion popup is visible
 891         if (completer_->popupVisible()) {
 892                 switch (ev->key()) {
 893                 case Qt::Key_Enter:
 894                 case Qt::Key_Return:
 895                         completer_->activate();
 896                         ev->accept();
 897                         return;
 898                 }
 899         }
 900
 901         // do nothing if there are other events
 902         // (the auto repeated events come too fast)
 903         // \todo FIXME: remove hard coded Qt keys, process the key binding
 904 #ifdef Q_WS_X11
 905         if (XEventsQueued(QX11Info::display(), 0) > 1 && ev->isAutoRepeat()
 906                         && (Qt::Key_PageDown || Qt::Key_PageUp)) {
 907                 LYXERR(Debug::KEY, "system is busy: scroll key event ignored");
 908                 ev->ignore();
 909                 return;
 910         }
 911 #endif
 912
 913         LYXERR(Debug::KEY, " count: " << ev->count() << " text: " << ev->text()
 914                 << " isAutoRepeat: " << ev->isAutoRepeat() << " key: " << ev->key());
 915
 916         KeySymbol sym;
 917         setKeySymbol(&sym, ev);
 918         if (sym.isOK()) {
 919                 processKeySym(sym, q_key_state(ev->modifiers()));
 920                 ev->accept();
 921         } else {
 922                 ev->ignore();
 923         }
 924 }
 925
 926
 927 void GuiWorkArea::doubleClickTimeout()
 928 {
 929         dc_event_.active = false;
 930 }
 931
 932
 933 void GuiWorkArea::mouseDoubleClickEvent(QMouseEvent * ev)
 934 {
 935         dc_event_ = DoubleClick(ev);
 936         QTimer::singleShot(QApplication::doubleClickInterval(), this,
 937                            SLOT(doubleClickTimeout()));
 938         FuncRequest cmd(LFUN_MOUSE_DOUBLE,
 939                         ev->x(), ev->y(),
 940                         q_button_state(ev->button()));
 941         dispatch(cmd);
 942         ev->accept();
 943 }
 944
 945
 946 void GuiWorkArea::resizeEvent(QResizeEvent * ev)
 947 {
 948         QAbstractScrollArea::resizeEvent(ev);
 949         need_resize_ = true;
 950         ev->accept();
 951 }
 952
 953
 954 void GuiWorkArea::update(int x, int y, int w, int h)
 955 {
 956         viewport()->repaint(x, y, w, h);
 957 }
 958
 959
 960 void GuiWorkArea::paintEvent(QPaintEvent * ev)
 961 {
 962         QRect const rc = ev->rect();
 963         // LYXERR(Debug::PAINTING, "paintEvent begin: x: " << rc.x()
 964         //      << " y: " << rc.y() << " w: " << rc.width() << " h: " << rc.height());
 965
 966         if (need_resize_) {
 967                 screen_ = QPixmap(viewport()->width(), viewport()->height());
 968                 resizeBufferView();
 969                 hideCursor();
 970                 showCursor();
 971         }
 972
 973         QPainter pain(viewport());
 974         pain.drawPixmap(rc, screen_, rc);
 975         cursor_->draw(pain);
 976         ev->accept();
 977 }
 978
 979
 980 void GuiWorkArea::updateScreen()
 981 {
 982         GuiPainter pain(&screen_);
 983         buffer_view_->draw(pain);
 984 }
 985
 986
 987 void GuiWorkArea::showCursor(int x, int y, int h,
 988         bool l_shape, bool rtl, bool completable)
 989 {
 990         if (schedule_redraw_) {
 991                 // This happens when a graphic conversion is finished. As we don't know
 992                 // the size of the new graphics, it's better the update everything.
 993                 // We can't use redraw() here because this would trigger a infinite
 994                 // recursive loop with showCursor().
 995                 buffer_view_->resize(viewport()->width(), viewport()->height());
 996                 updateScreen();
 997                 updateScrollbar();
 998                 viewport()->update(QRect(0, 0, viewport()->width(), viewport()->height()));
 999                 schedule_redraw_ = false;
1000                 // Show the cursor immediately after the update.
1001                 hideCursor();
1002                 toggleCursor();
1003                 return;
1004         }
1005
1006         cursor_->update(x, y, h, l_shape, rtl, completable);
1007         cursor_->show();
1008         viewport()->update(cursor_->rect());
1009 }
1010
1011
1012 void GuiWorkArea::removeCursor()
1013 {
1014         cursor_->hide();
1015         //if (!qApp->focusWidget())
1016                 viewport()->update(cursor_->rect());
1017 }
1018
1019
1020 void GuiWorkArea::inputMethodEvent(QInputMethodEvent * e)
1021 {
1022         QString const & commit_string = e->commitString();
1023         docstring const & preedit_string
1024                 = qstring_to_ucs4(e->preeditString());
1025
1026         if (!commit_string.isEmpty()) {
1027
1028                 LYXERR(Debug::KEY, "preeditString: " << e->preeditString()
1029                         << " commitString: " << e->commitString());
1030
1031                 int key = 0;
1032
1033                 // FIXME Iwami 04/01/07: we should take care also of UTF16 surrogates here.
1034                 for (int i = 0; i != commit_string.size(); ++i) {
1035                         QKeyEvent ev(QEvent::KeyPress, key, Qt::NoModifier, commit_string[i]);
1036                         keyPressEvent(&ev);
1037                 }
1038         }
1039
1040         // Hide the cursor during the kana-kanji transformation.
1041         if (preedit_string.empty())
1042                 startBlinkingCursor();
1043         else
1044                 stopBlinkingCursor();
1045
1046         // last_width : for checking if last preedit string was/wasn't empty.
1047         static bool last_width = false;
1048         if (!last_width && preedit_string.empty()) {
1049                 // if last_width is last length of preedit string.
1050                 e->accept();
1051                 return;
1052         }
1053
1054         GuiPainter pain(&screen_);
1055         buffer_view_->updateMetrics();
1056         buffer_view_->draw(pain);
1057         FontInfo font = buffer_view_->cursor().getFont().fontInfo();
1058         FontMetrics const & fm = theFontMetrics(font);
1059         int height = fm.maxHeight();
1060         int cur_x = cursor_->rect().left();
1061         int cur_y = cursor_->rect().bottom();
1062
1063         // redraw area of preedit string.
1064         update(0, cur_y - height, viewport()->width(),
1065                 (height + 1) * preedit_lines_);
1066
1067         if (preedit_string.empty()) {
1068                 last_width = false;
1069                 preedit_lines_ = 1;
1070                 e->accept();
1071                 return;
1072         }
1073         last_width = true;
1074
1075         // att : stores an IM attribute.
1076         QList<QInputMethodEvent::Attribute> const & att = e->attributes();
1077
1078         // get attributes of input method cursor.
1079         // cursor_pos : cursor position in preedit string.
1080         size_t cursor_pos = 0;
1081         bool cursor_is_visible = false;
1082         for (int i = 0; i != att.size(); ++i) {
1083                 if (att.at(i).type == QInputMethodEvent::Cursor) {
1084                         cursor_pos = att.at(i).start;
1085                         cursor_is_visible = att.at(i).length != 0;
1086                         break;
1087                 }
1088         }
1089
1090         size_t preedit_length = preedit_string.length();
1091
1092         // get position of selection in input method.
1093         // FIXME: isn't there a way to do this simplier?
1094         // rStart : cursor position in selected string in IM.
1095         size_t rStart = 0;
1096         // rLength : selected string length in IM.
1097         size_t rLength = 0;
1098         if (cursor_pos < preedit_length) {
1099                 for (int i = 0; i != att.size(); ++i) {
1100                         if (att.at(i).type == QInputMethodEvent::TextFormat) {
1101                                 if (att.at(i).start <= int(cursor_pos)
1102                                         && int(cursor_pos) < att.at(i).start + att.at(i).length) {
1103                                                 rStart = att.at(i).start;
1104                                                 rLength = att.at(i).length;
1105                                                 if (!cursor_is_visible)
1106                                                         cursor_pos += rLength;
1107                                                 break;
1108                                 }
1109                         }
1110                 }
1111         }
1112         else {
1113                 rStart = cursor_pos;
1114                 rLength = 0;
1115         }
1116
1117         int const right_margin = buffer_view_->rightMargin();
1118         Painter::preedit_style ps;
1119         // Most often there would be only one line:
1120         preedit_lines_ = 1;
1121         for (size_t pos = 0; pos != preedit_length; ++pos) {
1122                 char_type const typed_char = preedit_string[pos];
1123                 // reset preedit string style
1124                 ps = Painter::preedit_default;
1125
1126                 // if we reached the right extremity of the screen, go to next line.
1127                 if (cur_x + fm.width(typed_char) > viewport()->width() - right_margin) {
1128                         cur_x = right_margin;
1129                         cur_y += height + 1;
1130                         ++preedit_lines_;
1131                 }
1132                 // preedit strings are displayed with dashed underline
1133                 // and partial strings are displayed white on black indicating
1134                 // that we are in selecting mode in the input method.
1135                 // FIXME: rLength == preedit_length is not a changing condition
1136                 // FIXME: should be put out of the loop.
1137                 if (pos >= rStart
1138                         && pos < rStart + rLength
1139                         && !(cursor_pos < rLength && rLength == preedit_length))
1140                         ps = Painter::preedit_selecting;
1141
1142                 if (pos == cursor_pos
1143                         && (cursor_pos < rLength && rLength == preedit_length))
1144                         ps = Painter::preedit_cursor;
1145
1146                 // draw one character and update cur_x.
1147                 cur_x += pain.preeditText(cur_x, cur_y, typed_char, font, ps);
1148         }
1149
1150         // update the preedit string screen area.
1151         update(0, cur_y - preedit_lines_*height, viewport()->width(),
1152                 (height + 1) * preedit_lines_);
1153
1154         // Don't forget to accept the event!
1155         e->accept();
1156 }
1157
1158
1159 QVariant GuiWorkArea::inputMethodQuery(Qt::InputMethodQuery query) const
1160 {
1161         QRect cur_r(0, 0, 0, 0);
1162         switch (query) {
1163                 // this is the CJK-specific composition window position and
1164                 // the context menu position when the menu key is pressed.
1165                 case Qt::ImMicroFocus:
1166                         cur_r = cursor_->rect();
1167                         if (preedit_lines_ != 1)
1168                                 cur_r.moveLeft(10);
1169                         cur_r.moveBottom(cur_r.bottom()
1170                                 + cur_r.height() * (preedit_lines_ - 1));
1171                         // return lower right of cursor in LyX.
1172                         return cur_r;
1173                 default:
1174                         return QWidget::inputMethodQuery(query);
1175         }
1176 }
1177
1178
1179 void GuiWorkArea::updateWindowTitle()
1180 {
1181         docstring maximize_title;
1182         docstring minimize_title;
1183
1184         Buffer & buf = buffer_view_->buffer();
1185         FileName const fileName = buf.fileName();
1186         if (!fileName.empty()) {
1187                 maximize_title = fileName.displayName(30);
1188                 minimize_title = from_utf8(fileName.onlyFileName());
1189                 if (buf.lyxvc().inUse()) {
1190                         if (buf.lyxvc().locker().empty())
1191                                 maximize_title +=  _(" (version control)");
1192                         else
1193                                 maximize_title +=  _(" (version control, locking)");
1194                 }
1195                 if (!buf.isClean()) {
1196                         maximize_title += _(" (changed)");
1197                         minimize_title += char_type('*');
1198                 }
1199                 if (buf.isReadonly())
1200                         maximize_title += _(" (read only)");
1201         }
1202
1203         QString title = windowTitle();
1204         QString new_title = toqstr(maximize_title);
1205         if (title == new_title)
1206                 return;
1207
1208         QWidget::setWindowTitle(new_title);
1209         QWidget::setWindowIconText(toqstr(minimize_title));
1210         titleChanged(this);
1211 }
1212
1213
1214 void GuiWorkArea::setReadOnly(bool)
1215 {
1216         updateWindowTitle();
1217         if (this == lyx_view_->currentWorkArea())
1218                 lyx_view_->updateDialogs();
1219 }
1220
1221
1222 bool GuiWorkArea::isFullScreen()
1223 {
1224         return lyx_view_ && lyx_view_->isFullScreen();
1225 }
1226
1227
1228 ////////////////////////////////////////////////////////////////////
1229 //
1230 // EmbeddedWorkArea
1231 //
1232 ////////////////////////////////////////////////////////////////////
1233
1234
1235 EmbeddedWorkArea::EmbeddedWorkArea(QWidget * w): GuiWorkArea(w)
1236 {
1237         buffer_ = theBufferList().newBuffer(
1238                 support::FileName::tempName().absFilename() + "_embedded.internal");
1239         buffer_->setUnnamed(true);
1240         buffer_->setFullyLoaded(true);
1241         setBuffer(*buffer_);
1242         setDialogMode(true);
1243 }
1244
1245
1246 EmbeddedWorkArea::~EmbeddedWorkArea()
1247 {
1248         // No need to destroy buffer and bufferview here, because it is done
1249         // in theBuffeerList() destruction loop at application exit
1250 }
1251
1252
1253 void EmbeddedWorkArea::closeEvent(QCloseEvent * ev)
1254 {
1255         disable();
1256         GuiWorkArea::closeEvent(ev);
1257 }
1258
1259
1260 void EmbeddedWorkArea::hideEvent(QHideEvent * ev)
1261 {
1262         disable();
1263         GuiWorkArea::hideEvent(ev);
1264 }
1265
1266
1267 void EmbeddedWorkArea::disable()
1268 {
1269         stopBlinkingCursor();
1270         if (view().currentWorkArea() != this)
1271                 return;
1272         LASSERT(view().currentMainWorkArea(), /* */);
1273         view().setCurrentWorkArea(view().currentMainWorkArea());
1274 }
1275
1276 ////////////////////////////////////////////////////////////////////
1277 //
1278 // TabWorkArea
1279 //
1280 ////////////////////////////////////////////////////////////////////
1281
1282 #ifdef Q_WS_MACX
1283 class NoTabFrameMacStyle : public QMacStyle {
1284 public:
1285         ///
1286         QRect subElementRect(SubElement element, const QStyleOption * option,
1287                              const QWidget * widget = 0) const
1288         {
1289                 QRect rect = QMacStyle::subElementRect(element, option, widget);
1290                 bool noBar = static_cast<QTabWidget const *>(widget)->count() <= 1;
1291
1292                 // The Qt Mac style puts the contents into a 3 pixel wide box
1293                 // which looks very ugly and not like other Mac applications.
1294                 // Hence we remove this here, and moreover the 16 pixel round
1295                 // frame above if the tab bar is hidden.
1296                 if (element == QStyle::SE_TabWidgetTabContents) {
1297                         rect.adjust(- rect.left(), 0, rect.left(), 0);
1298                         if (noBar)
1299                                 rect.setTop(0);
1300                 }
1301
1302                 return rect;
1303         }
1304 };
1305
1306 NoTabFrameMacStyle noTabFrameMacStyle;
1307 #endif
1308
1309
1310 TabWorkArea::TabWorkArea(QWidget * parent)
1311         : QTabWidget(parent), clicked_tab_(-1)
1312 {
1313 #ifdef Q_WS_MACX
1314         setStyle(&noTabFrameMacStyle);
1315 #endif
1316
1317         QPalette pal = palette();
1318         pal.setColor(QPalette::Active, QPalette::Button,
1319                 pal.color(QPalette::Active, QPalette::Window));
1320         pal.setColor(QPalette::Disabled, QPalette::Button,
1321                 pal.color(QPalette::Disabled, QPalette::Window));
1322         pal.setColor(QPalette::Inactive, QPalette::Button,
1323                 pal.color(QPalette::Inactive, QPalette::Window));
1324
1325         QObject::connect(this, SIGNAL(currentChanged(int)),
1326                 this, SLOT(on_currentTabChanged(int)));
1327
1328 #if QT_VERSION < 0x040500
1329         closeBufferButton = new QToolButton(this);
1330         closeBufferButton->setPalette(pal);
1331         // FIXME: rename the icon to closebuffer.png
1332         closeBufferButton->setIcon(QIcon(getPixmap("images/", "closetab", "png")));
1333         closeBufferButton->setText("Close File");
1334         closeBufferButton->setAutoRaise(true);
1335         closeBufferButton->setCursor(Qt::ArrowCursor);
1336         closeBufferButton->setToolTip(qt_("Close File"));
1337         closeBufferButton->setEnabled(true);
1338         QObject::connect(closeBufferButton, SIGNAL(clicked()),
1339                 this, SLOT(closeCurrentBuffer()));
1340         setCornerWidget(closeBufferButton, Qt::TopRightCorner);
1341 #endif
1342
1343         // setup drag'n'drop
1344         QTabBar* tb = new DragTabBar;
1345         connect(tb, SIGNAL(tabMoveRequested(int, int)),
1346                 this, SLOT(moveTab(int, int)));
1347         tb->setElideMode(Qt::ElideNone);
1348         setTabBar(tb);
1349
1350         // make us responsible for the context menu of the tabbar
1351         tb->setContextMenuPolicy(Qt::CustomContextMenu);
1352         connect(tb, SIGNAL(customContextMenuRequested(const QPoint &)),
1353                 this, SLOT(showContextMenu(const QPoint &)));
1354 #if QT_VERSION >= 0x040500
1355         connect(tb, SIGNAL(tabCloseRequested(int)),
1356                 tb, SLOT(on_tabCloseRequested(int)));
1357 #endif
1358
1359         setUsesScrollButtons(true);
1360 }
1361
1362
1363 void TabWorkArea::setFullScreen(bool full_screen)
1364 {
1365         for (int i = 0; i != count(); ++i) {
1366                 if (GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i)))
1367                         wa->setFullScreen(full_screen);
1368         }
1369
1370         if (lyxrc.full_screen_tabbar)
1371                 showBar(!full_screen && count() > 1);
1372 }
1373
1374
1375 void TabWorkArea::showBar(bool show)
1376 {
1377         tabBar()->setEnabled(show);
1378         tabBar()->setVisible(show);
1379 #if QT_VERSION < 0x040500
1380         closeBufferButton->setVisible(show);
1381 #endif
1382 }
1383
1384
1385 GuiWorkArea * TabWorkArea::currentWorkArea()
1386 {
1387         if (count() == 0)
1388                 return 0;
1389
1390         GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(currentWidget());
1391         LASSERT(wa, /**/);
1392         return wa;
1393 }
1394
1395
1396 GuiWorkArea * TabWorkArea::workArea(Buffer & buffer)
1397 {
1398         for (int i = 0; i != count(); ++i) {
1399                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1400                 LASSERT(wa, return 0);
1401                 if (&wa->bufferView().buffer() == &buffer)
1402                         return wa;
1403         }
1404         return 0;
1405 }
1406
1407
1408 void TabWorkArea::closeAll()
1409 {
1410         while (count()) {
1411                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(0));
1412                 LASSERT(wa, /**/);
1413                 removeTab(0);
1414                 delete wa;
1415         }
1416 }
1417
1418
1419 bool TabWorkArea::setCurrentWorkArea(GuiWorkArea * work_area)
1420 {
1421         LASSERT(work_area, /**/);
1422         int index = indexOf(work_area);
1423         if (index == -1)
1424                 return false;
1425
1426         if (index == currentIndex())
1427                 // Make sure the work area is up to date.
1428                 on_currentTabChanged(index);
1429         else
1430                 // Switch to the work area.
1431                 setCurrentIndex(index);
1432         work_area->setFocus();
1433
1434         return true;
1435 }
1436
1437
1438 GuiWorkArea * TabWorkArea::addWorkArea(Buffer & buffer, GuiView & view)
1439 {
1440         GuiWorkArea * wa = new GuiWorkArea(buffer, view);
1441         wa->setUpdatesEnabled(false);
1442         // Hide tabbar if there's no tab (avoid a resize and a flashing tabbar
1443         // when hiding it again below).
1444         if (!(currentWorkArea() && currentWorkArea()->isFullScreen()))
1445                 showBar(count() > 0);
1446         addTab(wa, wa->windowTitle());
1447         QObject::connect(wa, SIGNAL(titleChanged(GuiWorkArea *)),
1448                 this, SLOT(updateTabTexts()));
1449         if (currentWorkArea() && currentWorkArea()->isFullScreen())
1450                 setFullScreen(true);
1451         else
1452                 // Hide tabbar if there's only one tab.
1453                 showBar(count() > 1);
1454
1455         updateTabTexts();
1456
1457         return wa;
1458 }
1459
1460
1461 bool TabWorkArea::removeWorkArea(GuiWorkArea * work_area)
1462 {
1463         LASSERT(work_area, return false);
1464         int index = indexOf(work_area);
1465         if (index == -1)
1466                 return false;
1467
1468         work_area->setUpdatesEnabled(false);
1469         removeTab(index);
1470         delete work_area;
1471
1472         if (count()) {
1473                 // make sure the next work area is enabled.
1474                 currentWidget()->setUpdatesEnabled(true);
1475                 if (currentWorkArea() && currentWorkArea()->isFullScreen())
1476                         setFullScreen(true);
1477                 else
1478                         // Show tabbar only if there's more than one tab.
1479                         showBar(count() > 1);
1480         } else
1481                 lastWorkAreaRemoved();
1482
1483         updateTabTexts();
1484
1485         return true;
1486 }
1487
1488
1489 void TabWorkArea::on_currentTabChanged(int i)
1490 {
1491         // returns e.g. on application destruction
1492         if (i == -1)
1493                 return;
1494         GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1495         LASSERT(wa, return);
1496         BufferView & bv = wa->bufferView();
1497         bv.cursor().fixIfBroken();
1498         bv.updateMetrics();
1499         wa->setUpdatesEnabled(true);
1500         wa->redraw();
1501         wa->setFocus();
1502         ///
1503         currentWorkAreaChanged(wa);
1504
1505         LYXERR(Debug::GUI, "currentTabChanged " << i
1506                 << "File" << bv.buffer().absFileName());
1507 }
1508
1509
1510 void TabWorkArea::closeCurrentBuffer()
1511 {
1512         if (clicked_tab_ != -1)
1513                 setCurrentIndex(clicked_tab_);
1514         else
1515                 // Before dispatching the LFUN we should be sure this
1516                 // is the current workarea.
1517                 currentWorkAreaChanged(currentWorkArea());
1518
1519         lyx::dispatch(FuncRequest(LFUN_BUFFER_CLOSE));
1520 }
1521
1522
1523 void TabWorkArea::closeCurrentTab()
1524 {
1525         if (clicked_tab_ == -1)
1526                 removeWorkArea(currentWorkArea());
1527         else {
1528                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(clicked_tab_));
1529                 LASSERT(wa, /**/);
1530                 removeWorkArea(wa);
1531         }
1532 }
1533
1534 ///
1535 class DisplayPath {
1536 public:
1537         /// make vector happy
1538         DisplayPath() {}
1539         ///
1540         DisplayPath(int tab, FileName const & filename)
1541                 : tab_(tab)
1542         {
1543                 filename_ = toqstr(filename.onlyFileNameWithoutExt());
1544                 postfix_ = toqstr(filename.absoluteFilePath()).
1545                         split("/", QString::SkipEmptyParts);
1546                 postfix_.pop_back();
1547                 abs_ = toqstr(filename.absoluteFilePath());
1548                 dottedPrefix_ = false;
1549         }
1550
1551         /// Absolute path for debugging.
1552         QString abs() const
1553         {
1554                 return abs_;
1555         }
1556         /// Add the first segment from the postfix or three dots to the prefix.
1557         /// Merge multiple dot tripples. In fact dots are added lazily, i.e. only
1558         /// when really needed.
1559         void shiftPathSegment(bool dotted)
1560         {
1561                 if (postfix_.count() <= 0)
1562                         return;
1563
1564                 if (!dotted) {
1565                         if (dottedPrefix_ && !prefix_.isEmpty())
1566                                 prefix_ += ".../";
1567                         prefix_ += postfix_.front() + "/";
1568                 }
1569                 dottedPrefix_ = dotted && !prefix_.isEmpty();
1570                 postfix_.pop_front();
1571         }
1572         ///
1573         QString displayString() const
1574         {
1575                 if (prefix_.isEmpty())
1576                         return filename_;
1577
1578                 bool dots = dottedPrefix_ || !postfix_.isEmpty();
1579                 return prefix_ + (dots ? ".../" : "") + filename_;
1580         }
1581         ///
1582         QString forecastPathString() const
1583         {
1584                 if (postfix_.count() == 0)
1585                         return displayString();
1586
1587                 return prefix_
1588                         + (dottedPrefix_ ? ".../" : "")
1589                         + postfix_.front() + "/";
1590         }
1591         ///
1592         bool final() const { return postfix_.empty(); }
1593         ///
1594         int tab() const { return tab_; }
1595
1596 private:
1597         ///
1598         QString prefix_;
1599         ///
1600         QStringList postfix_;
1601         ///
1602         QString filename_;
1603         ///
1604         QString abs_;
1605         ///
1606         int tab_;
1607         ///
1608         bool dottedPrefix_;
1609 };
1610
1611
1612 ///
1613 bool operator<(DisplayPath const & a, DisplayPath const & b)
1614 {
1615         return a.displayString() < b.displayString();
1616 }
1617
1618 ///
1619 bool operator==(DisplayPath const & a, DisplayPath const & b)
1620 {
1621         return a.displayString() == b.displayString();
1622 }
1623
1624
1625 void TabWorkArea::updateTabTexts()
1626 {
1627         size_t n = count();
1628         if (n == 0)
1629                 return;
1630         std::list<DisplayPath> paths;
1631         typedef std::list<DisplayPath>::iterator It;
1632
1633         // collect full names first: path into postfix, empty prefix and
1634         // filename without extension
1635         for (size_t i = 0; i < n; ++i) {
1636                 GuiWorkArea * i_wa = dynamic_cast<GuiWorkArea *>(widget(i));
1637                 FileName const fn = i_wa->bufferView().buffer().fileName();
1638                 paths.push_back(DisplayPath(i, fn));
1639         }
1640
1641         // go through path segments and see if it helps to make the path more unique
1642         bool somethingChanged = true;
1643         bool allFinal = false;
1644         while (somethingChanged && !allFinal) {
1645                 // adding path segments changes order
1646                 paths.sort();
1647
1648                 LYXERR(Debug::GUI, "updateTabTexts() iteration start");
1649                 somethingChanged = false;
1650                 allFinal = true;
1651
1652                 // find segments which are not unique (i.e. non-atomic)
1653                 It it = paths.begin();
1654                 It segStart = it;
1655                 QString segString = it->displayString();
1656                 for (; it != paths.end(); ++it) {
1657                         // look to the next item
1658                         It next = it;
1659                         ++next;
1660
1661                         // final?
1662                         allFinal = allFinal && it->final();
1663
1664                         LYXERR(Debug::GUI, "it = " << it->abs()
1665                                << " => " << it->displayString());
1666
1667                         // still the same segment?
1668                         QString nextString;
1669                         if ((next != paths.end()
1670                              && (nextString = next->displayString()) == segString))
1671                                 continue;
1672                         LYXERR(Debug::GUI, "segment ended");
1673
1674                         // only a trivial one with one element?
1675                         if (it == segStart) {
1676                                 // start new segment
1677                                 segStart = next;
1678                                 segString = nextString;
1679                                 continue;
1680                         }
1681
1682                         // we found a non-atomic segment segStart <= sit <= it < next.
1683                         // Shift path segments and hope for the best
1684                         // that it makes the path more unique.
1685                         somethingChanged = true;
1686                         It sit = segStart;
1687                         QString dspString = sit->forecastPathString();
1688                         LYXERR(Debug::GUI, "first forecast found for "
1689                                << sit->abs() << " => " << dspString);
1690                         ++sit;
1691                         bool moreUnique = false;
1692                         for (; sit != next; ++sit) {
1693                                 if (sit->forecastPathString() != dspString) {
1694                                         LYXERR(Debug::GUI, "different forecast found for "
1695                                                 << sit->abs() << " => " << sit->forecastPathString());
1696                                         moreUnique = true;
1697                                         break;
1698                                 }
1699                                 LYXERR(Debug::GUI, "same forecast found for "
1700                                         << sit->abs() << " => " << dspString);
1701                         }
1702
1703                         // if the path segment helped, add it. Otherwise add dots
1704                         bool dots = !moreUnique;
1705                         LYXERR(Debug::GUI, "using dots = " << dots);
1706                         for (sit = segStart; sit != next; ++sit) {
1707                                 sit->shiftPathSegment(dots);
1708                                 LYXERR(Debug::GUI, "shifting "
1709                                         << sit->abs() << " => " << sit->displayString());
1710                         }
1711
1712                         // start new segment
1713                         segStart = next;
1714                         segString = nextString;
1715                 }
1716         }
1717
1718         // set new tab titles
1719         for (It it = paths.begin(); it != paths.end(); ++it) {
1720                 GuiWorkArea * i_wa = dynamic_cast<GuiWorkArea *>(widget(it->tab()));
1721                 Buffer & buf = i_wa->bufferView().buffer();
1722                 if (!buf.fileName().empty() && !buf.isClean())
1723                         setTabText(it->tab(), it->displayString() + "*");
1724                 else
1725                         setTabText(it->tab(), it->displayString());
1726         }
1727 }
1728
1729
1730 void TabWorkArea::showContextMenu(const QPoint & pos)
1731 {
1732         // which tab?
1733         clicked_tab_ = static_cast<DragTabBar *>(tabBar())->tabAt(pos);
1734         if (clicked_tab_ == -1)
1735                 return;
1736
1737         // show tab popup
1738         QMenu popup;
1739         popup.addAction(QIcon(getPixmap("images/", "hidetab", "png")),
1740                 qt_("Hide tab"), this, SLOT(closeCurrentTab()));
1741         popup.addAction(QIcon(getPixmap("images/", "closetab", "png")),
1742                 qt_("Close tab"), this, SLOT(closeCurrentBuffer()));
1743         popup.exec(tabBar()->mapToGlobal(pos));
1744
1745         clicked_tab_ = -1;
1746 }
1747
1748
1749 void TabWorkArea::moveTab(int fromIndex, int toIndex)
1750 {
1751         QWidget * w = widget(fromIndex);
1752         QIcon icon = tabIcon(fromIndex);
1753         QString text = tabText(fromIndex);
1754
1755         setCurrentIndex(fromIndex);
1756         removeTab(fromIndex);
1757         insertTab(toIndex, w, icon, text);
1758         setCurrentIndex(toIndex);
1759 }
1760
1761
1762 DragTabBar::DragTabBar(QWidget* parent)
1763         : QTabBar(parent)
1764 {
1765         setAcceptDrops(true);
1766 #if QT_VERSION >= 0x040500
1767         setTabsClosable(true);
1768 #endif
1769 }
1770
1771
1772 void DragTabBar::on_tabCloseRequested(int index)
1773 {
1774         setCurrentIndex(index);
1775         lyx::dispatch(FuncRequest(LFUN_BUFFER_CLOSE));
1776 }
1777
1778
1779 #if QT_VERSION < 0x040300
1780 int DragTabBar::tabAt(QPoint const & position) const
1781 {
1782         const int max = count();
1783         for (int i = 0; i < max; ++i) {
1784                 if (tabRect(i).contains(position))
1785                         return i;
1786         }
1787         return -1;
1788 }
1789 #endif
1790
1791
1792 void DragTabBar::mousePressEvent(QMouseEvent * event)
1793 {
1794         if (event->button() == Qt::LeftButton)
1795                 dragStartPos_ = event->pos();
1796         QTabBar::mousePressEvent(event);
1797 }
1798
1799
1800 void DragTabBar::mouseMoveEvent(QMouseEvent * event)
1801 {
1802         // If the left button isn't pressed anymore then return
1803         if (!(event->buttons() & Qt::LeftButton))
1804                 return;
1805
1806         // If the distance is too small then return
1807         if ((event->pos() - dragStartPos_).manhattanLength()
1808             < QApplication::startDragDistance())
1809                 return;
1810
1811         // did we hit something after all?
1812         int tab = tabAt(dragStartPos_);
1813         if (tab == -1)
1814                 return;
1815
1816         // simulate button release to remove highlight from button
1817         int i = currentIndex();
1818         QMouseEvent me(QEvent::MouseButtonRelease, dragStartPos_,
1819                 event->button(), event->buttons(), 0);
1820         QTabBar::mouseReleaseEvent(&me);
1821         setCurrentIndex(i);
1822
1823         // initiate Drag
1824         QDrag * drag = new QDrag(this);
1825         QMimeData * mimeData = new QMimeData;
1826         // a crude way to distinguish tab-reodering drops from other ones
1827         mimeData->setData("action", "tab-reordering") ;
1828         drag->setMimeData(mimeData);
1829
1830 #if QT_VERSION >= 0x040300
1831         // get tab pixmap as cursor
1832         QRect r = tabRect(tab);
1833         QPixmap pixmap(r.size());
1834         render(&pixmap, - r.topLeft());
1835         drag->setPixmap(pixmap);
1836         drag->exec();
1837 #else
1838         drag->start(Qt::MoveAction);
1839 #endif
1840
1841 }
1842
1843
1844 void DragTabBar::dragEnterEvent(QDragEnterEvent * event)
1845 {
1846         // Only accept if it's an tab-reordering request
1847         QMimeData const * m = event->mimeData();
1848         QStringList formats = m->formats();
1849         if (formats.contains("action")
1850             && m->data("action") == "tab-reordering")
1851                 event->acceptProposedAction();
1852 }
1853
1854
1855 void DragTabBar::dropEvent(QDropEvent * event)
1856 {
1857         int fromIndex = tabAt(dragStartPos_);
1858         int toIndex = tabAt(event->pos());
1859
1860         // Tell interested objects that
1861         if (fromIndex != toIndex)
1862                 tabMoveRequested(fromIndex, toIndex);
1863         event->acceptProposedAction();
1864 }
1865
1866
1867 } // namespace frontend
1868 } // namespace lyx
1869
1870 #include "moc_GuiWorkArea.cpp"