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/debug.h"
  47 #include "support/gettext.h"
  48 #include "support/FileName.h"
  49
  50 #include "frontends/Application.h"
  51 #include "frontends/FontMetrics.h"
  52 #include "frontends/WorkAreaManager.h"
  53
  54 #include <QContextMenuEvent>
  55 #include <QInputContext>
  56 #include <QHelpEvent>
  57 #ifdef Q_WS_MACX
  58 #include <QMacStyle>
  59 #endif
  60 #include <QMainWindow>
  61 #include <QMenu>
  62 #include <QPainter>
  63 #include <QPalette>
  64 #include <QPixmapCache>
  65 #include <QScrollBar>
  66 #include <QTimer>
  67 #include <QToolButton>
  68 #include <QToolTip>
  69 #include <QMenuBar>
  70
  71 #include <boost/bind.hpp>
  72
  73 #include <cmath>
  74
  75 #ifdef Q_WS_X11
  76 #include <QX11Info>
  77 extern "C" int XEventsQueued(Display *display, int mode);
  78 #endif
  79
  80 #ifdef Q_WS_WIN
  81 int const CursorWidth = 2;
  82 #else
  83 int const CursorWidth = 1;
  84 #endif
  85 int const TabIndicatorWidth = 3;
  86
  87 #undef KeyPress
  88 #undef NoModifier
  89
  90 using namespace std;
  91 using namespace lyx::support;
  92
  93 namespace lyx {
  94
  95
  96 /// return the LyX mouse button state from Qt's
  97 static mouse_button::state q_button_state(Qt::MouseButton button)
  98 {
  99         mouse_button::state b = mouse_button::none;
 100         switch (button) {
 101                 case Qt::LeftButton:
 102                         b = mouse_button::button1;
 103                         break;
 104                 case Qt::MidButton:
 105                         b = mouse_button::button2;
 106                         break;
 107                 case Qt::RightButton:
 108                         b = mouse_button::button3;
 109                         break;
 110                 default:
 111                         break;
 112         }
 113         return b;
 114 }
 115
 116
 117 /// return the LyX mouse button state from Qt's
 118 mouse_button::state q_motion_state(Qt::MouseButtons state)
 119 {
 120         mouse_button::state b = mouse_button::none;
 121         if (state & Qt::LeftButton)
 122                 b |= mouse_button::button1;
 123         if (state & Qt::MidButton)
 124                 b |= mouse_button::button2;
 125         if (state & Qt::RightButton)
 126                 b |= mouse_button::button3;
 127         return b;
 128 }
 129
 130
 131 namespace frontend {
 132
 133 class CursorWidget {
 134 public:
 135         CursorWidget() {}
 136
 137         void draw(QPainter & painter)
 138         {
 139                 if (!show_ || !rect_.isValid())
 140                         return;
 141
 142                 int y = rect_.top();
 143                 int l = x_ - rect_.left();
 144                 int r = rect_.right() - x_;
 145                 int bot = rect_.bottom();
 146
 147                 // draw vertica linel
 148                 painter.fillRect(x_, y, CursorWidth, rect_.height(), color_);
 149
 150                 // draw RTL/LTR indication
 151                 painter.setPen(color_);
 152                 if (l_shape_) {
 153                         if (rtl_)
 154                                 painter.drawLine(x_, bot, x_ - l, bot);
 155                         else
 156                                 painter.drawLine(x_, bot, x_ + CursorWidth + r, bot);
 157                 }
 158
 159                 // draw completion triangle
 160                 if (completable_) {
 161                         int m = y + rect_.height() / 2;
 162                         int d = TabIndicatorWidth - 1;
 163                         if (rtl_) {
 164                                 painter.drawLine(x_ - 1, m - d, x_ - 1 - d, m);
 165                                 painter.drawLine(x_ - 1, m + d, x_ - 1 - d, m);
 166                         } else {
 167                                 painter.drawLine(x_ + CursorWidth, m - d, x_ + CursorWidth + d, m);
 168                                 painter.drawLine(x_ + CursorWidth, m + d, x_ + CursorWidth + d, m);
 169                         }
 170                 }
 171         }
 172
 173         void update(int x, int y, int h, bool l_shape,
 174                 bool rtl, bool completable)
 175         {
 176                 color_ = guiApp->colorCache().get(Color_cursor);
 177                 l_shape_ = l_shape;
 178                 rtl_ = rtl;
 179                 completable_ = completable;
 180                 x_ = x;
 181
 182                 // extension to left and right
 183                 int l = 0;
 184                 int r = 0;
 185
 186                 // RTL/LTR indication
 187                 if (l_shape_) {
 188                         if (rtl)
 189                                 l += h / 3;
 190                         else
 191                                 r += h / 3;
 192                 }
 193
 194                 // completion triangle
 195                 if (completable_) {
 196                         if (rtl)
 197                                 l = max(l, TabIndicatorWidth);
 198                         else
 199                                 r = max(r, TabIndicatorWidth);
 200                 }
 201
 202                 // compute overall rectangle
 203                 rect_ = QRect(x - l, y, CursorWidth + r + l, h);
 204         }
 205
 206         void show(bool set_show = true) { show_ = set_show; }
 207         void hide() { show_ = false; }
 208
 209         QRect const & rect() { return rect_; }
 210
 211 private:
 212         /// cursor is in RTL or LTR text
 213         bool rtl_;
 214         /// indication for RTL or LTR
 215         bool l_shape_;
 216         /// triangle to show that a completion is available
 217         bool completable_;
 218         ///
 219         bool show_;
 220         ///
 221         QColor color_;
 222         /// rectangle, possibly with l_shape and completion triangle
 223         QRect rect_;
 224         /// x position (were the vertical line is drawn)
 225         int x_;
 226 };
 227
 228
 229 // This is a 'heartbeat' generating synthetic mouse move events when the
 230 // cursor is at the top or bottom edge of the viewport. One scroll per 0.2 s
 231 SyntheticMouseEvent::SyntheticMouseEvent()
 232         : timeout(200), restart_timeout(true),
 233           x_old(-1), y_old(-1), scrollbar_value_old(-1.0)
 234 {}
 235
 236
 237 GuiWorkArea::GuiWorkArea(QWidget *)
 238         : buffer_view_(0), lyx_view_(0),
 239         cursor_visible_(false),
 240         need_resize_(false), schedule_redraw_(false),
 241         preedit_lines_(1), completer_(new GuiCompleter(this))
 242 {
 243 }
 244
 245
 246 GuiWorkArea::GuiWorkArea(Buffer & buffer, GuiView & gv)
 247         : buffer_view_(0), lyx_view_(0),
 248         cursor_visible_(false),
 249         need_resize_(false), schedule_redraw_(false),
 250         preedit_lines_(1), completer_(new GuiCompleter(this))
 251 {
 252         setGuiView(gv);
 253         setBuffer(buffer);
 254         init();
 255 }
 256
 257
 258 void GuiWorkArea::init()
 259 {
 260         // Setup the signals
 261         connect(&cursor_timeout_, SIGNAL(timeout()),
 262                 this, SLOT(toggleCursor()));
 263
 264         int const time = QApplication::cursorFlashTime() / 2;
 265         if (time > 0) {
 266                 cursor_timeout_.setInterval(time);
 267                 cursor_timeout_.start();
 268         } else {
 269                 // let's initialize this just to be safe
 270                 cursor_timeout_.setInterval(500);
 271         }
 272
 273         screen_ = QPixmap(viewport()->width(), viewport()->height());
 274         cursor_ = new frontend::CursorWidget();
 275         cursor_->hide();
 276
 277         setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 278         setAcceptDrops(true);
 279         setMouseTracking(true);
 280         setMinimumSize(100, 70);
 281         setFrameStyle(QFrame::NoFrame);
 282         updateWindowTitle();
 283
 284         viewport()->setAutoFillBackground(false);
 285         // We don't need double-buffering nor SystemBackground on
 286         // the viewport because we have our own backing pixmap.
 287         viewport()->setAttribute(Qt::WA_NoSystemBackground);
 288
 289         setFocusPolicy(Qt::StrongFocus);
 290
 291         viewport()->setCursor(Qt::IBeamCursor);
 292
 293         synthetic_mouse_event_.timeout.timeout.connect(
 294                 boost::bind(&GuiWorkArea::generateSyntheticMouseEvent,
 295                                         this));
 296
 297         // Initialize the vertical Scroll Bar
 298         QObject::connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
 299                 this, SLOT(scrollTo(int)));
 300
 301         LYXERR(Debug::GUI, "viewport width: " << viewport()->width()
 302                 << "  viewport height: " << viewport()->height());
 303
 304         // Enables input methods for asian languages.
 305         // Must be set when creating custom text editing widgets.
 306         setAttribute(Qt::WA_InputMethodEnabled, true);
 307
 308         dialog_mode_ = false;
 309 }
 310
 311
 312 GuiWorkArea::~GuiWorkArea()
 313 {
 314         buffer_view_->buffer().workAreaManager().remove(this);
 315         delete buffer_view_;
 316         delete cursor_;
 317         // Completer has a QObject parent and is thus automatically destroyed.
 318         // delete completer_;
 319 }
 320
 321
 322 void GuiWorkArea::setGuiView(GuiView & gv)
 323 {
 324         lyx_view_ = &gv;
 325 }
 326
 327
 328 void GuiWorkArea::setBuffer(Buffer & buffer)
 329 {
 330         delete buffer_view_;
 331         buffer_view_ = new BufferView(buffer),
 332         buffer.workAreaManager().add(this);
 333
 334         // HACK: Prevents an additional redraw when the scrollbar pops up
 335         // which regularily happens on documents with more than one page.
 336         // The policy  should be set to "Qt::ScrollBarAsNeeded" soon.
 337         // Since we have no geometry information yet, we assume that
 338         // a document needs a scrollbar if there is more then four
 339         // paragraph in the outermost text.
 340         if (buffer.text().paragraphs().size() > 4)
 341                 setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
 342         QTimer::singleShot(50, this, SLOT(fixVerticalScrollBar()));
 343 }
 344
 345
 346 void GuiWorkArea::fixVerticalScrollBar()
 347 {
 348         if (!isFullScreen())
 349                 setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
 350 }
 351
 352
 353 void GuiWorkArea::close()
 354 {
 355         lyx_view_->removeWorkArea(this);
 356 }
 357
 358
 359 void GuiWorkArea::setFullScreen(bool full_screen)
 360 {
 361         buffer_view_->setFullScreen(full_screen);
 362         if (full_screen) {
 363                 setFrameStyle(QFrame::NoFrame);
 364                 if (lyxrc.full_screen_scrollbar)
 365                         setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 366         } else {
 367 #ifdef Q_WS_MACX
 368                 setFrameStyle(QFrame::NoFrame);
 369 #else
 370                 setFrameStyle(QFrame::Box);
 371 #endif
 372                 setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
 373         }
 374 }
 375
 376
 377 BufferView & GuiWorkArea::bufferView()
 378 {
 379         return *buffer_view_;
 380 }
 381
 382
 383 BufferView const & GuiWorkArea::bufferView() const
 384 {
 385         return *buffer_view_;
 386 }
 387
 388
 389 void GuiWorkArea::stopBlinkingCursor()
 390 {
 391         cursor_timeout_.stop();
 392         hideCursor();
 393 }
 394
 395
 396 void GuiWorkArea::startBlinkingCursor()
 397 {
 398         showCursor();
 399         //we're not supposed to cache this value.
 400         int const time = QApplication::cursorFlashTime() / 2;
 401         if (time <= 0)
 402                 return;
 403         cursor_timeout_.setInterval(time);
 404         cursor_timeout_.start();
 405 }
 406
 407
 408 void GuiWorkArea::redraw()
 409 {
 410         if (!isVisible())
 411                 // No need to redraw in this case.
 412                 return;
 413
 414         // No need to do anything if this is the current view. The BufferView
 415         // metrics are already up to date.
 416         if (lyx_view_ != guiApp->currentView()
 417                 || lyx_view_->currentWorkArea() != this) {
 418                 // FIXME: it would be nice to optimize for the off-screen case.
 419                 buffer_view_->updateMetrics();
 420                 buffer_view_->cursor().fixIfBroken();
 421         }
 422
 423         // update cursor position, because otherwise it has to wait until
 424         // the blinking interval is over
 425         if (cursor_visible_) {
 426                 hideCursor();
 427                 showCursor();
 428         }
 429
 430         LYXERR(Debug::WORKAREA, "WorkArea::redraw screen");
 431         updateScreen();
 432         update(0, 0, viewport()->width(), viewport()->height());
 433
 434         /// \warning: scrollbar updating *must* be done after the BufferView is drawn
 435         /// because \c BufferView::updateScrollbar() is called in \c BufferView::draw().
 436         updateScrollbar();
 437         lyx_view_->updateStatusBar();
 438
 439         if (lyxerr.debugging(Debug::WORKAREA))
 440                 buffer_view_->coordCache().dump();
 441 }
 442
 443
 444 void GuiWorkArea::processKeySym(KeySymbol const & key, KeyModifier mod)
 445 {
 446         if (lyx_view_->isFullScreen() && lyx_view_->menuBar()->isVisible()) {
 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         buffer_view_->resize(viewport()->width(), viewport()->height());
 521         buffer_view_->scrollToCursor();
 522         updateScreen();
 523
 524         // Update scrollbars which might have changed due different
 525         // BufferView dimension. This is especially important when the
 526         // BufferView goes from zero-size to the real-size for the first time,
 527         // as the scrollbar paramters are then set for the first time.
 528         updateScrollbar();
 529
 530         lyx_view_->updateLayoutList();
 531         lyx_view_->setBusy(false);
 532         need_resize_ = false;
 533 }
 534
 535
 536 void GuiWorkArea::showCursor()
 537 {
 538         if (cursor_visible_)
 539                 return;
 540
 541         // RTL or not RTL
 542         bool l_shape = false;
 543         Font const & realfont = buffer_view_->cursor().real_current_font;
 544         BufferParams const & bp = buffer_view_->buffer().params();
 545         bool const samelang = realfont.language() == bp.language;
 546         bool const isrtl = realfont.isVisibleRightToLeft();
 547
 548         if (!samelang || isrtl != bp.language->rightToLeft())
 549                 l_shape = true;
 550
 551         // The ERT language hack needs fixing up
 552         if (realfont.language() == latex_language)
 553                 l_shape = false;
 554
 555         Font const font = buffer_view_->cursor().getFont();
 556         FontMetrics const & fm = theFontMetrics(font);
 557         int const asc = fm.maxAscent();
 558         int const des = fm.maxDescent();
 559         int h = asc + des;
 560         int x = 0;
 561         int y = 0;
 562         Cursor & cur = buffer_view_->cursor();
 563         cur.getPos(x, y);
 564         y -= asc;
 565
 566         // if it doesn't touch the screen, don't try to show it
 567         bool cursorInView = true;
 568         if (y + h < 0 || y >= viewport()->height()
 569                 || !cur.bv().paragraphVisible(cur))
 570                 cursorInView = false;
 571
 572         // show cursor on screen
 573         bool completable = cur.inset().showCompletionCursor()
 574                 && completer_->completionAvailable()
 575                 && !completer_->popupVisible()
 576                 && !completer_->inlineVisible();
 577         if (cursorInView) {
 578                 cursor_visible_ = true;
 579                 showCursor(x, y, h, l_shape, isrtl, completable);
 580         }
 581 }
 582
 583
 584 void GuiWorkArea::hideCursor()
 585 {
 586         if (!cursor_visible_)
 587                 return;
 588
 589         cursor_visible_ = false;
 590         removeCursor();
 591 }
 592
 593
 594 void GuiWorkArea::toggleCursor()
 595 {
 596         if (cursor_visible_)
 597                 hideCursor();
 598         else
 599                 showCursor();
 600 }
 601
 602
 603 void GuiWorkArea::updateScrollbar()
 604 {
 605         ScrollbarParameters const & scroll_ = buffer_view_->scrollbarParameters();
 606         // WARNING: don't touch at the scrollbar value like this:
 607         //   verticalScrollBar()->setValue(scroll_.position);
 608         // because this would cause a recursive signal/slot calling with
 609         // GuiWorkArea::scrollTo
 610         verticalScrollBar()->setRange(scroll_.min, scroll_.max);
 611         verticalScrollBar()->setPageStep(scroll_.page_step);
 612         verticalScrollBar()->setSingleStep(scroll_.single_step);
 613         verticalScrollBar()->setSliderPosition(scroll_.position);
 614 }
 615
 616
 617 void GuiWorkArea::scrollTo(int value)
 618 {
 619         stopBlinkingCursor();
 620         buffer_view_->scrollDocView(value);
 621
 622         if (lyxrc.cursor_follows_scrollbar) {
 623                 buffer_view_->setCursorFromScrollbar();
 624                 lyx_view_->updateLayoutList();
 625         }
 626         // Show the cursor immediately after any operation.
 627         startBlinkingCursor();
 628         QApplication::syncX();
 629 }
 630
 631
 632 bool GuiWorkArea::event(QEvent * e)
 633 {
 634         switch (e->type()) {
 635         case QEvent::ToolTip: {
 636                 QHelpEvent * helpEvent = static_cast<QHelpEvent *>(e);
 637                 if (lyxrc.use_tooltip) {
 638                         QPoint pos = helpEvent->pos();
 639                         if (pos.x() < viewport()->width()) {
 640                                 QString s = toqstr(buffer_view_->toolTip(pos.x(), pos.y()));
 641                                 QToolTip::showText(helpEvent->globalPos(), s);
 642                         }
 643                         else
 644                                 QToolTip::hideText();
 645                 }
 646                 // Don't forget to accept the event!
 647                 e->accept();
 648                 return true;
 649         }
 650
 651         case QEvent::ShortcutOverride: {
 652                 // We catch this event in order to catch the Tab or Shift+Tab key press
 653                 // which are otherwise reserved to focus switching between controls
 654                 // within a dialog.
 655                 QKeyEvent * ke = static_cast<QKeyEvent*>(e);
 656                 if ((ke->key() != Qt::Key_Tab && ke->key() != Qt::Key_Backtab)
 657                         || ke->modifiers() & Qt::ControlModifier)
 658                         return QAbstractScrollArea::event(e);
 659                 keyPressEvent(ke);
 660                 return true;
 661         }
 662
 663         default:
 664                 return QAbstractScrollArea::event(e);
 665         }
 666         return false;
 667 }
 668
 669
 670 void GuiWorkArea::contextMenuEvent(QContextMenuEvent * e)
 671 {
 672         QPoint pos = e->pos();
 673         docstring name = buffer_view_->contextMenu(pos.x(), pos.y());
 674         if (name.empty()) {
 675                 QAbstractScrollArea::contextMenuEvent(e);
 676                 return;
 677         }
 678         QMenu * menu = guiApp->menus().menu(toqstr(name), *lyx_view_);
 679         if (!menu) {
 680                 QAbstractScrollArea::contextMenuEvent(e);
 681                 return;
 682         }
 683         // Position the menu to the right.
 684         // FIXME: menu position should be different for RTL text.
 685         menu->exec(e->globalPos());
 686         e->accept();
 687 }
 688
 689
 690 void GuiWorkArea::focusInEvent(QFocusEvent * e)
 691 {
 692         /*
 693         LYXERR(Debug::DEBUG, "GuiWorkArea::focusInEvent(): " << this << std::endl);
 694         GuiWorkArea * old_gwa = theGuiApp()->currentView()->currentWorkArea();
 695         if (old_gwa)
 696                 old_gwa->stopBlinkingCursor();
 697         lyx_view_->setCurrentWorkArea(this);
 698         */
 699
 700         if (lyx_view_->currentWorkArea() != this)
 701                 lyx_view_->setCurrentWorkArea(this);
 702
 703         startBlinkingCursor();
 704         QAbstractScrollArea::focusInEvent(e);
 705 }
 706
 707
 708 void GuiWorkArea::focusOutEvent(QFocusEvent * e)
 709 {
 710         LYXERR(Debug::DEBUG, "GuiWorkArea::focusOutEvent(): " << this << std::endl);
 711         stopBlinkingCursor();
 712         QAbstractScrollArea::focusOutEvent(e);
 713 }
 714
 715
 716 void GuiWorkArea::mousePressEvent(QMouseEvent * e)
 717 {
 718         if (dc_event_.active && dc_event_ == *e) {
 719                 dc_event_.active = false;
 720                 FuncRequest cmd(LFUN_MOUSE_TRIPLE, e->x(), e->y(),
 721                         q_button_state(e->button()));
 722                 dispatch(cmd);
 723                 e->accept();
 724                 return;
 725         }
 726
 727         inputContext()->reset();
 728
 729         FuncRequest const cmd(LFUN_MOUSE_PRESS, e->x(), e->y(),
 730                 q_button_state(e->button()));
 731         dispatch(cmd, q_key_state(e->modifiers()));
 732         e->accept();
 733 }
 734
 735
 736 void GuiWorkArea::mouseReleaseEvent(QMouseEvent * e)
 737 {
 738         if (synthetic_mouse_event_.timeout.running())
 739                 synthetic_mouse_event_.timeout.stop();
 740
 741         FuncRequest const cmd(LFUN_MOUSE_RELEASE, e->x(), e->y(),
 742                               q_button_state(e->button()));
 743         dispatch(cmd);
 744         e->accept();
 745 }
 746
 747
 748 void GuiWorkArea::mouseMoveEvent(QMouseEvent * e)
 749 {
 750         // we kill the triple click if we move
 751         doubleClickTimeout();
 752         FuncRequest cmd(LFUN_MOUSE_MOTION, e->x(), e->y(),
 753                 q_motion_state(e->buttons()));
 754
 755         e->accept();
 756
 757         // If we're above or below the work area...
 758         if (e->y() <= 20 || e->y() >= viewport()->height() - 20) {
 759                 // Make sure only a synthetic event can cause a page scroll,
 760                 // so they come at a steady rate:
 761                 if (e->y() <= 20)
 762                         // _Force_ a scroll up:
 763                         cmd.y = -40;
 764                 else
 765                         cmd.y = viewport()->height();
 766                 // Store the event, to be handled when the timeout expires.
 767                 synthetic_mouse_event_.cmd = cmd;
 768
 769                 if (synthetic_mouse_event_.timeout.running())
 770                         // Discard the event. Note that it _may_ be handled
 771                         // when the timeout expires if
 772                         // synthetic_mouse_event_.cmd has not been overwritten.
 773                         // Ie, when the timeout expires, we handle the
 774                         // most recent event but discard all others that
 775                         // occurred after the one used to start the timeout
 776                         // in the first place.
 777                         return;
 778
 779                 synthetic_mouse_event_.restart_timeout = true;
 780                 synthetic_mouse_event_.timeout.start();
 781                 // Fall through to handle this event...
 782
 783         } else if (synthetic_mouse_event_.timeout.running()) {
 784                 // Store the event, to be possibly handled when the timeout
 785                 // expires.
 786                 // Once the timeout has expired, normal control is returned
 787                 // to mouseMoveEvent (restart_timeout = false).
 788                 // This results in a much smoother 'feel' when moving the
 789                 // mouse back into the work area.
 790                 synthetic_mouse_event_.cmd = cmd;
 791                 synthetic_mouse_event_.restart_timeout = false;
 792                 return;
 793         }
 794
 795         // Has anything changed on-screen since the last QMouseEvent
 796         // was received?
 797         double const scrollbar_value = verticalScrollBar()->value();
 798         if (e->x() == synthetic_mouse_event_.x_old
 799                 && e->y() == synthetic_mouse_event_.y_old
 800                 && scrollbar_value == synthetic_mouse_event_.scrollbar_value_old) {
 801                 // Nothing changed on-screen since the last QMouseEvent.
 802                 return;
 803         }
 804
 805         // Yes something has changed. Store the params used to check this.
 806         synthetic_mouse_event_.x_old = e->x();
 807         synthetic_mouse_event_.y_old = e->y();
 808         synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
 809
 810         // ... and dispatch the event to the LyX core.
 811         dispatch(cmd);
 812 }
 813
 814
 815 void GuiWorkArea::wheelEvent(QWheelEvent * ev)
 816 {
 817         // Wheel rotation by one notch results in a delta() of 120 (see
 818         // documentation of QWheelEvent)
 819         int const delta = ev->delta() / 120;
 820         if (ev->modifiers() & Qt::ControlModifier) {
 821                 lyxrc.zoom += 5 * delta;
 822                 if (lyxrc.zoom < 10)
 823                         lyxrc.zoom = 10;
 824                 // The global QPixmapCache is used in GuiPainter to cache text
 825                 // painting so we must reset it.
 826                 QPixmapCache::clear();
 827                 guiApp->fontLoader().update();
 828                 ev->accept();
 829                 lyx::dispatch(FuncRequest(LFUN_SCREEN_FONT_UPDATE));
 830                 return;
 831         }
 832
 833         // Take into account the desktop wide settings.
 834         int const lines = qApp->wheelScrollLines();
 835         int const page_step = verticalScrollBar()->pageStep();
 836         // Test if the wheel mouse is set to one screen at a time.
 837         int scroll_value = lines > page_step
 838                 ? page_step : lines * verticalScrollBar()->singleStep();
 839
 840         // Take into account the rotation.
 841         scroll_value *= delta;
 842
 843         // Take into account user preference.
 844         scroll_value *= lyxrc.mouse_wheel_speed;
 845         LYXERR(Debug::SCROLLING, "wheelScrollLines = " << lines
 846                         << " delta = " << delta << " scroll_value = " << scroll_value
 847                         << " page_step = " << page_step);
 848         // Now scroll.
 849         verticalScrollBar()->setValue(verticalScrollBar()->value() - scroll_value);
 850
 851         ev->accept();
 852 }
 853
 854
 855 void GuiWorkArea::generateSyntheticMouseEvent()
 856 {
 857         // Set things off to generate the _next_ 'pseudo' event.
 858         if (synthetic_mouse_event_.restart_timeout)
 859                 synthetic_mouse_event_.timeout.start();
 860
 861         // Has anything changed on-screen since the last timeout signal
 862         // was received?
 863         double const scrollbar_value = verticalScrollBar()->value();
 864         if (scrollbar_value != synthetic_mouse_event_.scrollbar_value_old) {
 865                 // Yes it has. Store the params used to check this.
 866                 synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
 867
 868                 // ... and dispatch the event to the LyX core.
 869                 dispatch(synthetic_mouse_event_.cmd);
 870         }
 871 }
 872
 873
 874 void GuiWorkArea::keyPressEvent(QKeyEvent * ev)
 875 {
 876         // Do not process here some keys if dialog_mode_ is set
 877         if (dialog_mode_
 878                 && (ev->modifiers() == Qt::NoModifier
 879                     || ev->modifiers() == Qt::ShiftModifier)
 880                 && (ev->key() == Qt::Key_Escape
 881                     || ev->key() == Qt::Key_Enter
 882                     || ev->key() == Qt::Key_Return)
 883             ) {
 884                 ev->ignore();
 885                 return;
 886         }
 887
 888         // intercept some keys if completion popup is visible
 889         if (completer_->popupVisible()) {
 890                 switch (ev->key()) {
 891                 case Qt::Key_Enter:
 892                 case Qt::Key_Return:
 893                         completer_->activate();
 894                         ev->accept();
 895                         return;
 896                 }
 897         }
 898
 899         // do nothing if there are other events
 900         // (the auto repeated events come too fast)
 901         // \todo FIXME: remove hard coded Qt keys, process the key binding
 902 #ifdef Q_WS_X11
 903         if (XEventsQueued(QX11Info::display(), 0) > 1 && ev->isAutoRepeat()
 904                         && (Qt::Key_PageDown || Qt::Key_PageUp)) {
 905                 LYXERR(Debug::KEY, "system is busy: scroll key event ignored");
 906                 ev->ignore();
 907                 return;
 908         }
 909 #endif
 910
 911         LYXERR(Debug::KEY, " count: " << ev->count() << " text: " << ev->text()
 912                 << " isAutoRepeat: " << ev->isAutoRepeat() << " key: " << ev->key());
 913
 914         KeySymbol sym;
 915         setKeySymbol(&sym, ev);
 916         processKeySym(sym, q_key_state(ev->modifiers()));
 917         ev->accept();
 918 }
 919
 920
 921 void GuiWorkArea::doubleClickTimeout()
 922 {
 923         dc_event_.active = false;
 924 }
 925
 926
 927 void GuiWorkArea::mouseDoubleClickEvent(QMouseEvent * ev)
 928 {
 929         dc_event_ = DoubleClick(ev);
 930         QTimer::singleShot(QApplication::doubleClickInterval(), this,
 931                            SLOT(doubleClickTimeout()));
 932         FuncRequest cmd(LFUN_MOUSE_DOUBLE,
 933                         ev->x(), ev->y(),
 934                         q_button_state(ev->button()));
 935         dispatch(cmd);
 936         ev->accept();
 937 }
 938
 939
 940 void GuiWorkArea::resizeEvent(QResizeEvent * ev)
 941 {
 942         QAbstractScrollArea::resizeEvent(ev);
 943         need_resize_ = true;
 944         ev->accept();
 945 }
 946
 947
 948 void GuiWorkArea::update(int x, int y, int w, int h)
 949 {
 950         viewport()->repaint(x, y, w, h);
 951 }
 952
 953
 954 void GuiWorkArea::paintEvent(QPaintEvent * ev)
 955 {
 956         QRect const rc = ev->rect();
 957         // LYXERR(Debug::PAINTING, "paintEvent begin: x: " << rc.x()
 958         //      << " y: " << rc.y() << " w: " << rc.width() << " h: " << rc.height());
 959
 960         if (need_resize_) {
 961                 screen_ = QPixmap(viewport()->width(), viewport()->height());
 962                 resizeBufferView();
 963                 hideCursor();
 964                 showCursor();
 965         }
 966
 967         QPainter pain(viewport());
 968         pain.drawPixmap(rc, screen_, rc);
 969         cursor_->draw(pain);
 970         ev->accept();
 971 }
 972
 973
 974 void GuiWorkArea::updateScreen()
 975 {
 976         GuiPainter pain(&screen_);
 977         buffer_view_->draw(pain);
 978 }
 979
 980
 981 void GuiWorkArea::showCursor(int x, int y, int h,
 982         bool l_shape, bool rtl, bool completable)
 983 {
 984         if (schedule_redraw_) {
 985                 // This happens when a graphic conversion is finished. As we don't know
 986                 // the size of the new graphics, it's better the update everything.
 987                 // We can't use redraw() here because this would trigger a infinite
 988                 // recursive loop with showCursor().
 989                 buffer_view_->resize(viewport()->width(), viewport()->height());
 990                 updateScreen();
 991                 updateScrollbar();
 992                 viewport()->update(QRect(0, 0, viewport()->width(), viewport()->height()));
 993                 schedule_redraw_ = false;
 994                 // Show the cursor immediately after the update.
 995                 hideCursor();
 996                 toggleCursor();
 997                 return;
 998         }
 999
1000         cursor_->update(x, y, h, l_shape, rtl, completable);
1001         cursor_->show();
1002         viewport()->update(cursor_->rect());
1003 }
1004
1005
1006 void GuiWorkArea::removeCursor()
1007 {
1008         cursor_->hide();
1009         //if (!qApp->focusWidget())
1010                 viewport()->update(cursor_->rect());
1011 }
1012
1013
1014 void GuiWorkArea::inputMethodEvent(QInputMethodEvent * e)
1015 {
1016         QString const & commit_string = e->commitString();
1017         docstring const & preedit_string
1018                 = qstring_to_ucs4(e->preeditString());
1019
1020         if (!commit_string.isEmpty()) {
1021
1022                 LYXERR(Debug::KEY, "preeditString: " << e->preeditString()
1023                         << " commitString: " << e->commitString());
1024
1025                 int key = 0;
1026
1027                 // FIXME Iwami 04/01/07: we should take care also of UTF16 surrogates here.
1028                 for (int i = 0; i != commit_string.size(); ++i) {
1029                         QKeyEvent ev(QEvent::KeyPress, key, Qt::NoModifier, commit_string[i]);
1030                         keyPressEvent(&ev);
1031                 }
1032         }
1033
1034         // Hide the cursor during the kana-kanji transformation.
1035         if (preedit_string.empty())
1036                 startBlinkingCursor();
1037         else
1038                 stopBlinkingCursor();
1039
1040         // last_width : for checking if last preedit string was/wasn't empty.
1041         static bool last_width = false;
1042         if (!last_width && preedit_string.empty()) {
1043                 // if last_width is last length of preedit string.
1044                 e->accept();
1045                 return;
1046         }
1047
1048         GuiPainter pain(&screen_);
1049         buffer_view_->updateMetrics();
1050         buffer_view_->draw(pain);
1051         FontInfo font = buffer_view_->cursor().getFont().fontInfo();
1052         FontMetrics const & fm = theFontMetrics(font);
1053         int height = fm.maxHeight();
1054         int cur_x = cursor_->rect().left();
1055         int cur_y = cursor_->rect().bottom();
1056
1057         // redraw area of preedit string.
1058         update(0, cur_y - height, viewport()->width(),
1059                 (height + 1) * preedit_lines_);
1060
1061         if (preedit_string.empty()) {
1062                 last_width = false;
1063                 preedit_lines_ = 1;
1064                 e->accept();
1065                 return;
1066         }
1067         last_width = true;
1068
1069         // att : stores an IM attribute.
1070         QList<QInputMethodEvent::Attribute> const & att = e->attributes();
1071
1072         // get attributes of input method cursor.
1073         // cursor_pos : cursor position in preedit string.
1074         size_t cursor_pos = 0;
1075         bool cursor_is_visible = false;
1076         for (int i = 0; i != att.size(); ++i) {
1077                 if (att.at(i).type == QInputMethodEvent::Cursor) {
1078                         cursor_pos = att.at(i).start;
1079                         cursor_is_visible = att.at(i).length != 0;
1080                         break;
1081                 }
1082         }
1083
1084         size_t preedit_length = preedit_string.length();
1085
1086         // get position of selection in input method.
1087         // FIXME: isn't there a way to do this simplier?
1088         // rStart : cursor position in selected string in IM.
1089         size_t rStart = 0;
1090         // rLength : selected string length in IM.
1091         size_t rLength = 0;
1092         if (cursor_pos < preedit_length) {
1093                 for (int i = 0; i != att.size(); ++i) {
1094                         if (att.at(i).type == QInputMethodEvent::TextFormat) {
1095                                 if (att.at(i).start <= int(cursor_pos)
1096                                         && int(cursor_pos) < att.at(i).start + att.at(i).length) {
1097                                                 rStart = att.at(i).start;
1098                                                 rLength = att.at(i).length;
1099                                                 if (!cursor_is_visible)
1100                                                         cursor_pos += rLength;
1101                                                 break;
1102                                 }
1103                         }
1104                 }
1105         }
1106         else {
1107                 rStart = cursor_pos;
1108                 rLength = 0;
1109         }
1110
1111         int const right_margin = buffer_view_->rightMargin();
1112         Painter::preedit_style ps;
1113         // Most often there would be only one line:
1114         preedit_lines_ = 1;
1115         for (size_t pos = 0; pos != preedit_length; ++pos) {
1116                 char_type const typed_char = preedit_string[pos];
1117                 // reset preedit string style
1118                 ps = Painter::preedit_default;
1119
1120                 // if we reached the right extremity of the screen, go to next line.
1121                 if (cur_x + fm.width(typed_char) > viewport()->width() - right_margin) {
1122                         cur_x = right_margin;
1123                         cur_y += height + 1;
1124                         ++preedit_lines_;
1125                 }
1126                 // preedit strings are displayed with dashed underline
1127                 // and partial strings are displayed white on black indicating
1128                 // that we are in selecting mode in the input method.
1129                 // FIXME: rLength == preedit_length is not a changing condition
1130                 // FIXME: should be put out of the loop.
1131                 if (pos >= rStart
1132                         && pos < rStart + rLength
1133                         && !(cursor_pos < rLength && rLength == preedit_length))
1134                         ps = Painter::preedit_selecting;
1135
1136                 if (pos == cursor_pos
1137                         && (cursor_pos < rLength && rLength == preedit_length))
1138                         ps = Painter::preedit_cursor;
1139
1140                 // draw one character and update cur_x.
1141                 cur_x += pain.preeditText(cur_x, cur_y, typed_char, font, ps);
1142         }
1143
1144         // update the preedit string screen area.
1145         update(0, cur_y - preedit_lines_*height, viewport()->width(),
1146                 (height + 1) * preedit_lines_);
1147
1148         // Don't forget to accept the event!
1149         e->accept();
1150 }
1151
1152
1153 QVariant GuiWorkArea::inputMethodQuery(Qt::InputMethodQuery query) const
1154 {
1155         QRect cur_r(0, 0, 0, 0);
1156         switch (query) {
1157                 // this is the CJK-specific composition window position.
1158                 case Qt::ImMicroFocus:
1159                         cur_r = cursor_->rect();
1160                         if (preedit_lines_ != 1)
1161                                 cur_r.moveLeft(10);
1162                         cur_r.moveBottom(cur_r.bottom() + cur_r.height() * preedit_lines_);
1163                         // return lower right of cursor in LyX.
1164                         return cur_r;
1165                 default:
1166                         return QWidget::inputMethodQuery(query);
1167         }
1168 }
1169
1170
1171 void GuiWorkArea::updateWindowTitle()
1172 {
1173         docstring maximize_title;
1174         docstring minimize_title;
1175
1176         Buffer & buf = buffer_view_->buffer();
1177         FileName const fileName = buf.fileName();
1178         if (!fileName.empty()) {
1179                 maximize_title = fileName.displayName(30);
1180                 minimize_title = from_utf8(fileName.onlyFileName());
1181                 if (buf.lyxvc().inUse()) {
1182                         if (buf.lyxvc().locker().empty())
1183                                 maximize_title +=  _(" (version control)");
1184                         else
1185                                 maximize_title +=  _(" (version control, locking)");
1186                 }
1187                 if (!buf.isClean()) {
1188                         maximize_title += _(" (changed)");
1189                         minimize_title += char_type('*');
1190                 }
1191                 if (buf.isReadonly())
1192                         maximize_title += _(" (read only)");
1193         }
1194
1195         QString title = windowTitle();
1196         QString new_title = toqstr(maximize_title);
1197         if (title == new_title)
1198                 return;
1199
1200         QWidget::setWindowTitle(new_title);
1201         QWidget::setWindowIconText(toqstr(minimize_title));
1202         titleChanged(this);
1203 }
1204
1205
1206 void GuiWorkArea::setReadOnly(bool)
1207 {
1208         updateWindowTitle();
1209         if (this == lyx_view_->currentWorkArea())
1210                 lyx_view_->updateDialogs();
1211 }
1212
1213
1214 bool GuiWorkArea::isFullScreen()
1215 {
1216         return lyx_view_ && lyx_view_->isFullScreen();
1217 }
1218
1219
1220 ////////////////////////////////////////////////////////////////////
1221 //
1222 // EmbeddedWorkArea
1223 //
1224 ////////////////////////////////////////////////////////////////////
1225
1226
1227 EmbeddedWorkArea::EmbeddedWorkArea(QWidget * w): GuiWorkArea(w)
1228 {
1229         buffer_ = theBufferList().newBuffer(
1230                 support::FileName::tempName().absFilename() + "_embedded.internal");
1231         buffer_->setUnnamed(true);
1232         buffer_->setFullyLoaded(true);
1233         setBuffer(*buffer_);
1234         setDialogMode(true);
1235 }
1236
1237
1238 EmbeddedWorkArea::~EmbeddedWorkArea()
1239 {
1240         // No need to destroy buffer and bufferview here, because it is done
1241         // in theBuffeerList() destruction loop at application exit
1242 }
1243
1244
1245 void EmbeddedWorkArea::closeEvent(QCloseEvent * ev)
1246 {
1247         disable();
1248         GuiWorkArea::closeEvent(ev);
1249 }
1250
1251
1252 void EmbeddedWorkArea::hideEvent(QHideEvent * ev)
1253 {
1254         disable();
1255         GuiWorkArea::hideEvent(ev);
1256 }
1257
1258
1259 void EmbeddedWorkArea::disable()
1260 {
1261         stopBlinkingCursor();
1262         if (view().currentWorkArea() != this)
1263                 return;
1264         LASSERT(view().currentMainWorkArea(), /* */);
1265         view().setCurrentWorkArea(view().currentMainWorkArea());
1266 }
1267
1268 ////////////////////////////////////////////////////////////////////
1269 //
1270 // TabWorkArea
1271 //
1272 ////////////////////////////////////////////////////////////////////
1273
1274 #ifdef Q_WS_MACX
1275 class NoTabFrameMacStyle : public QMacStyle {
1276 public:
1277         ///
1278         QRect subElementRect(SubElement element, const QStyleOption * option,
1279                              const QWidget * widget = 0) const
1280         {
1281                 QRect rect = QMacStyle::subElementRect(element, option, widget);
1282                 bool noBar = static_cast<QTabWidget const *>(widget)->count() <= 1;
1283
1284                 // The Qt Mac style puts the contents into a 3 pixel wide box
1285                 // which looks very ugly and not like other Mac applications.
1286                 // Hence we remove this here, and moreover the 16 pixel round
1287                 // frame above if the tab bar is hidden.
1288                 if (element == QStyle::SE_TabWidgetTabContents) {
1289                         rect.adjust(- rect.left(), 0, rect.left(), 0);
1290                         if (noBar)
1291                                 rect.setTop(0);
1292                 }
1293
1294                 return rect;
1295         }
1296 };
1297
1298 NoTabFrameMacStyle noTabFrameMacStyle;
1299 #endif
1300
1301
1302 TabWorkArea::TabWorkArea(QWidget * parent)
1303         : QTabWidget(parent), clicked_tab_(-1)
1304 {
1305 #ifdef Q_WS_MACX
1306         setStyle(&noTabFrameMacStyle);
1307 #endif
1308
1309         QPalette pal = palette();
1310         pal.setColor(QPalette::Active, QPalette::Button,
1311                 pal.color(QPalette::Active, QPalette::Window));
1312         pal.setColor(QPalette::Disabled, QPalette::Button,
1313                 pal.color(QPalette::Disabled, QPalette::Window));
1314         pal.setColor(QPalette::Inactive, QPalette::Button,
1315                 pal.color(QPalette::Inactive, QPalette::Window));
1316
1317         QObject::connect(this, SIGNAL(currentChanged(int)),
1318                 this, SLOT(on_currentTabChanged(int)));
1319
1320         closeBufferButton = new QToolButton(this);
1321         closeBufferButton->setPalette(pal);
1322         // FIXME: rename the icon to closebuffer.png
1323         closeBufferButton->setIcon(QIcon(getPixmap("images/", "closetab", "png")));
1324         closeBufferButton->setText("Close File");
1325         closeBufferButton->setAutoRaise(true);
1326         closeBufferButton->setCursor(Qt::ArrowCursor);
1327         closeBufferButton->setToolTip(qt_("Close File"));
1328         closeBufferButton->setEnabled(true);
1329         QObject::connect(closeBufferButton, SIGNAL(clicked()),
1330                 this, SLOT(closeCurrentBuffer()));
1331         setCornerWidget(closeBufferButton, Qt::TopRightCorner);
1332
1333         // setup drag'n'drop
1334         QTabBar* tb = new DragTabBar;
1335         connect(tb, SIGNAL(tabMoveRequested(int, int)),
1336                 this, SLOT(moveTab(int, int)));
1337         tb->setElideMode(Qt::ElideNone);
1338         setTabBar(tb);
1339
1340         // make us responsible for the context menu of the tabbar
1341         tb->setContextMenuPolicy(Qt::CustomContextMenu);
1342         connect(tb, SIGNAL(customContextMenuRequested(const QPoint &)),
1343                 this, SLOT(showContextMenu(const QPoint &)));
1344
1345         setUsesScrollButtons(true);
1346 }
1347
1348
1349 void TabWorkArea::setFullScreen(bool full_screen)
1350 {
1351         for (int i = 0; i != count(); ++i) {
1352                 if (GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i)))
1353                         wa->setFullScreen(full_screen);
1354         }
1355
1356         if (lyxrc.full_screen_tabbar)
1357                 showBar(!full_screen && count()>1);
1358 }
1359
1360
1361 void TabWorkArea::showBar(bool show)
1362 {
1363         tabBar()->setEnabled(show);
1364         tabBar()->setVisible(show);
1365         closeBufferButton->setVisible(show);
1366 }
1367
1368
1369 GuiWorkArea * TabWorkArea::currentWorkArea()
1370 {
1371         if (count() == 0)
1372                 return 0;
1373
1374         GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(currentWidget());
1375         LASSERT(wa, /**/);
1376         return wa;
1377 }
1378
1379
1380 GuiWorkArea * TabWorkArea::workArea(Buffer & buffer)
1381 {
1382         for (int i = 0; i != count(); ++i) {
1383                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1384                 LASSERT(wa, return 0);
1385                 if (&wa->bufferView().buffer() == &buffer)
1386                         return wa;
1387         }
1388         return 0;
1389 }
1390
1391
1392 void TabWorkArea::closeAll()
1393 {
1394         while (count()) {
1395                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(0));
1396                 LASSERT(wa, /**/);
1397                 removeTab(0);
1398                 delete wa;
1399         }
1400 }
1401
1402
1403 bool TabWorkArea::setCurrentWorkArea(GuiWorkArea * work_area)
1404 {
1405         LASSERT(work_area, /**/);
1406         int index = indexOf(work_area);
1407         if (index == -1)
1408                 return false;
1409
1410         if (index == currentIndex())
1411                 // Make sure the work area is up to date.
1412                 on_currentTabChanged(index);
1413         else
1414                 // Switch to the work area.
1415                 setCurrentIndex(index);
1416         work_area->setFocus();
1417
1418         return true;
1419 }
1420
1421
1422 GuiWorkArea * TabWorkArea::addWorkArea(Buffer & buffer, GuiView & view)
1423 {
1424         GuiWorkArea * wa = new GuiWorkArea(buffer, view);
1425         wa->setUpdatesEnabled(false);
1426         // Hide tabbar if there's no tab (avoid a resize and a flashing tabbar
1427         // when hiding it again below).
1428         if (!(currentWorkArea() && currentWorkArea()->isFullScreen()))
1429                 showBar(count() > 0);
1430         addTab(wa, wa->windowTitle());
1431         QObject::connect(wa, SIGNAL(titleChanged(GuiWorkArea *)),
1432                 this, SLOT(updateTabTexts()));
1433         if (currentWorkArea() && currentWorkArea()->isFullScreen())
1434                 setFullScreen(true);
1435         else
1436                 // Hide tabbar if there's only one tab.
1437                 showBar(count() > 1);
1438
1439         updateTabTexts();
1440
1441         return wa;
1442 }
1443
1444
1445 bool TabWorkArea::removeWorkArea(GuiWorkArea * work_area)
1446 {
1447         LASSERT(work_area, return false);
1448         int index = indexOf(work_area);
1449         if (index == -1)
1450                 return false;
1451
1452         work_area->setUpdatesEnabled(false);
1453         removeTab(index);
1454         delete work_area;
1455
1456         if (count()) {
1457                 // make sure the next work area is enabled.
1458                 currentWidget()->setUpdatesEnabled(true);
1459                 if (currentWorkArea() && currentWorkArea()->isFullScreen())
1460                         setFullScreen(true);
1461                 else
1462                         // Hide tabbar if there's only one tab.
1463                         showBar(count() > 1);
1464         } else {
1465                 lastWorkAreaRemoved();
1466         }
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 }
1752
1753
1754 #if QT_VERSION < 0x040300
1755 int DragTabBar::tabAt(QPoint const & position) const
1756 {
1757         const int max = count();
1758         for (int i = 0; i < max; ++i) {
1759                 if (tabRect(i).contains(position))
1760                         return i;
1761         }
1762         return -1;
1763 }
1764 #endif
1765
1766
1767 void DragTabBar::mousePressEvent(QMouseEvent * event)
1768 {
1769         if (event->button() == Qt::LeftButton)
1770                 dragStartPos_ = event->pos();
1771         QTabBar::mousePressEvent(event);
1772 }
1773
1774
1775 void DragTabBar::mouseMoveEvent(QMouseEvent * event)
1776 {
1777         // If the left button isn't pressed anymore then return
1778         if (!(event->buttons() & Qt::LeftButton))
1779                 return;
1780
1781         // If the distance is too small then return
1782         if ((event->pos() - dragStartPos_).manhattanLength()
1783             < QApplication::startDragDistance())
1784                 return;
1785
1786         // did we hit something after all?
1787         int tab = tabAt(dragStartPos_);
1788         if (tab == -1)
1789                 return;
1790
1791         // simulate button release to remove highlight from button
1792         int i = currentIndex();
1793         QMouseEvent me(QEvent::MouseButtonRelease, dragStartPos_,
1794                 event->button(), event->buttons(), 0);
1795         QTabBar::mouseReleaseEvent(&me);
1796         setCurrentIndex(i);
1797
1798         // initiate Drag
1799         QDrag * drag = new QDrag(this);
1800         QMimeData * mimeData = new QMimeData;
1801         // a crude way to distinguish tab-reodering drops from other ones
1802         mimeData->setData("action", "tab-reordering") ;
1803         drag->setMimeData(mimeData);
1804
1805 #if QT_VERSION >= 0x040300
1806         // get tab pixmap as cursor
1807         QRect r = tabRect(tab);
1808         QPixmap pixmap(r.size());
1809         render(&pixmap, - r.topLeft());
1810         drag->setPixmap(pixmap);
1811         drag->exec();
1812 #else
1813         drag->start(Qt::MoveAction);
1814 #endif
1815
1816 }
1817
1818
1819 void DragTabBar::dragEnterEvent(QDragEnterEvent * event)
1820 {
1821         // Only accept if it's an tab-reordering request
1822         QMimeData const * m = event->mimeData();
1823         QStringList formats = m->formats();
1824         if (formats.contains("action")
1825             && m->data("action") == "tab-reordering")
1826                 event->acceptProposedAction();
1827 }
1828
1829
1830 void DragTabBar::dropEvent(QDropEvent * event)
1831 {
1832         int fromIndex = tabAt(dragStartPos_);
1833         int toIndex = tabAt(event->pos());
1834
1835         // Tell interested objects that
1836         if (fromIndex != toIndex)
1837                 tabMoveRequested(fromIndex, toIndex);
1838         event->acceptProposedAction();
1839 }
1840
1841
1842 } // namespace frontend
1843 } // namespace lyx
1844
1845 #include "moc_GuiWorkArea.cpp"