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         if (full_screen) {
 367                 setFrameStyle(QFrame::NoFrame);
 368                 if (lyxrc.full_screen_scrollbar)
 369                         setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 370         } else {
 371 #ifdef Q_WS_MACX
 372                 setFrameStyle(QFrame::NoFrame);
 373 #else
 374                 setFrameStyle(QFrame::Box);
 375 #endif
 376                 setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
 377         }
 378 }
 379
 380
 381 BufferView & GuiWorkArea::bufferView()
 382 {
 383         return *buffer_view_;
 384 }
 385
 386
 387 BufferView const & GuiWorkArea::bufferView() const
 388 {
 389         return *buffer_view_;
 390 }
 391
 392
 393 void GuiWorkArea::stopBlinkingCursor()
 394 {
 395         cursor_timeout_.stop();
 396         hideCursor();
 397 }
 398
 399
 400 void GuiWorkArea::startBlinkingCursor()
 401 {
 402         showCursor();
 403         //we're not supposed to cache this value.
 404         int const time = QApplication::cursorFlashTime() / 2;
 405         if (time <= 0)
 406                 return;
 407         cursor_timeout_.setInterval(time);
 408         cursor_timeout_.start();
 409 }
 410
 411
 412 void GuiWorkArea::redraw()
 413 {
 414         if (!isVisible())
 415                 // No need to redraw in this case.
 416                 return;
 417
 418         // No need to do anything if this is the current view. The BufferView
 419         // metrics are already up to date.
 420         if (lyx_view_ != guiApp->currentView()
 421                 || lyx_view_->currentWorkArea() != this) {
 422                 // FIXME: it would be nice to optimize for the off-screen case.
 423                 buffer_view_->updateMetrics();
 424                 buffer_view_->cursor().fixIfBroken();
 425         }
 426
 427         // update cursor position, because otherwise it has to wait until
 428         // the blinking interval is over
 429         if (cursor_visible_) {
 430                 hideCursor();
 431                 showCursor();
 432         }
 433
 434         LYXERR(Debug::WORKAREA, "WorkArea::redraw screen");
 435         updateScreen();
 436         update(0, 0, viewport()->width(), viewport()->height());
 437
 438         /// \warning: scrollbar updating *must* be done after the BufferView is drawn
 439         /// because \c BufferView::updateScrollbar() is called in \c BufferView::draw().
 440         updateScrollbar();
 441         lyx_view_->updateStatusBar();
 442
 443         if (lyxerr.debugging(Debug::WORKAREA))
 444                 buffer_view_->coordCache().dump();
 445 }
 446
 447
 448 void GuiWorkArea::processKeySym(KeySymbol const & key, KeyModifier mod)
 449 {
 450         if (lyx_view_->isFullScreen() && lyx_view_->menuBar()->isVisible()
 451                 && lyxrc.full_screen_menubar) {
 452                 // FIXME HACK: we should not have to do this here. See related comment
 453                 // in GuiView::event() (QEvent::ShortcutOverride)
 454                 lyx_view_->menuBar()->hide();
 455         }
 456
 457         // In order to avoid bad surprise in the middle of an operation,
 458         // we better stop the blinking cursor...
 459         // the cursor gets restarted in GuiView::restartCursor()
 460         stopBlinkingCursor();
 461
 462         theLyXFunc().setLyXView(lyx_view_);
 463         theLyXFunc().processKeySym(key, mod);
 464 }
 465
 466
 467 void GuiWorkArea::dispatch(FuncRequest const & cmd0, KeyModifier mod)
 468 {
 469         // Handle drag&drop
 470         if (cmd0.action == LFUN_FILE_OPEN) {
 471                 lyx_view_->dispatch(cmd0);
 472                 return;
 473         }
 474
 475         theLyXFunc().setLyXView(lyx_view_);
 476
 477         FuncRequest cmd;
 478
 479         if (cmd0.action == LFUN_MOUSE_PRESS) {
 480                 if (mod == ShiftModifier)
 481                         cmd = FuncRequest(cmd0, "region-select");
 482                 else if (mod == ControlModifier)
 483                         cmd = FuncRequest(cmd0, "paragraph-select");
 484                 else
 485                         cmd = cmd0;
 486         }
 487         else
 488                 cmd = cmd0;
 489
 490         bool const notJustMovingTheMouse =
 491                 cmd.action != LFUN_MOUSE_MOTION || cmd.button() != mouse_button::none;
 492
 493         // In order to avoid bad surprise in the middle of an operation, we better stop
 494         // the blinking cursor.
 495         if (notJustMovingTheMouse)
 496                 stopBlinkingCursor();
 497
 498         buffer_view_->mouseEventDispatch(cmd);
 499
 500         // Skip these when selecting
 501         if (cmd.action != LFUN_MOUSE_MOTION) {
 502                 completer_->updateVisibility(false, false);
 503                 lyx_view_->updateDialogs();
 504                 lyx_view_->updateStatusBar();
 505         }
 506
 507         // GUI tweaks except with mouse motion with no button pressed.
 508         if (notJustMovingTheMouse) {
 509                 // Slight hack: this is only called currently when we
 510                 // clicked somewhere, so we force through the display
 511                 // of the new status here.
 512                 lyx_view_->clearMessage();
 513
 514                 // Show the cursor immediately after any operation
 515                 startBlinkingCursor();
 516         }
 517 }
 518
 519
 520 void GuiWorkArea::resizeBufferView()
 521 {
 522         // WARNING: Please don't put any code that will trigger a repaint here!
 523         // We are already inside a paint event.
 524         lyx_view_->setBusy(true);
 525         Point p;
 526         int h = 0;
 527         buffer_view_->cursorPosAndHeight(p, h);
 528         bool const cursor_in_view = buffer_view_->cursorInView(p, h);
 529         buffer_view_->resize(viewport()->width(), viewport()->height());
 530         if (cursor_in_view)
 531                 buffer_view_->scrollToCursor();
 532         updateScreen();
 533
 534         // Update scrollbars which might have changed due different
 535         // BufferView dimension. This is especially important when the
 536         // BufferView goes from zero-size to the real-size for the first time,
 537         // as the scrollbar paramters are then set for the first time.
 538         updateScrollbar();
 539
 540         lyx_view_->updateLayoutList();
 541         lyx_view_->setBusy(false);
 542         need_resize_ = false;
 543 }
 544
 545
 546 void GuiWorkArea::showCursor()
 547 {
 548         if (cursor_visible_)
 549                 return;
 550
 551         // RTL or not RTL
 552         bool l_shape = false;
 553         Font const & realfont = buffer_view_->cursor().real_current_font;
 554         BufferParams const & bp = buffer_view_->buffer().params();
 555         bool const samelang = realfont.language() == bp.language;
 556         bool const isrtl = realfont.isVisibleRightToLeft();
 557
 558         if (!samelang || isrtl != bp.language->rightToLeft())
 559                 l_shape = true;
 560
 561         // The ERT language hack needs fixing up
 562         if (realfont.language() == latex_language)
 563                 l_shape = false;
 564
 565         Point p;
 566         int h = 0;
 567         buffer_view_->cursorPosAndHeight(p, h);
 568         // show cursor on screen
 569         Cursor & cur = buffer_view_->cursor();
 570         bool completable = cur.inset().showCompletionCursor()
 571                 && completer_->completionAvailable()
 572                 && !completer_->popupVisible()
 573                 && !completer_->inlineVisible();
 574         if (buffer_view_->cursorInView(p, h)) {
 575                 cursor_visible_ = true;
 576                 showCursor(p.x_, p.y_, h, l_shape, isrtl, completable);
 577         }
 578 }
 579
 580
 581 void GuiWorkArea::hideCursor()
 582 {
 583         if (!cursor_visible_)
 584                 return;
 585
 586         cursor_visible_ = false;
 587         removeCursor();
 588 }
 589
 590
 591 void GuiWorkArea::toggleCursor()
 592 {
 593         if (cursor_visible_)
 594                 hideCursor();
 595         else
 596                 showCursor();
 597 }
 598
 599
 600 void GuiWorkArea::updateScrollbar()
 601 {
 602         ScrollbarParameters const & scroll_ = buffer_view_->scrollbarParameters();
 603         // WARNING: don't touch at the scrollbar value like this:
 604         //   verticalScrollBar()->setValue(scroll_.position);
 605         // because this would cause a recursive signal/slot calling with
 606         // GuiWorkArea::scrollTo
 607         verticalScrollBar()->setRange(scroll_.min, scroll_.max);
 608         verticalScrollBar()->setPageStep(scroll_.page_step);
 609         verticalScrollBar()->setSingleStep(scroll_.single_step);
 610         verticalScrollBar()->setSliderPosition(scroll_.position);
 611 }
 612
 613
 614 void GuiWorkArea::scrollTo(int value)
 615 {
 616         stopBlinkingCursor();
 617         buffer_view_->scrollDocView(value);
 618
 619         if (lyxrc.cursor_follows_scrollbar) {
 620                 buffer_view_->setCursorFromScrollbar();
 621                 lyx_view_->updateLayoutList();
 622         }
 623         // Show the cursor immediately after any operation.
 624         startBlinkingCursor();
 625         QApplication::syncX();
 626 }
 627
 628
 629 bool GuiWorkArea::event(QEvent * e)
 630 {
 631         switch (e->type()) {
 632         case QEvent::ToolTip: {
 633                 QHelpEvent * helpEvent = static_cast<QHelpEvent *>(e);
 634                 if (lyxrc.use_tooltip) {
 635                         QPoint pos = helpEvent->pos();
 636                         if (pos.x() < viewport()->width()) {
 637                                 QString s = toqstr(buffer_view_->toolTip(pos.x(), pos.y()));
 638                                 QToolTip::showText(helpEvent->globalPos(), s);
 639                         }
 640                         else
 641                                 QToolTip::hideText();
 642                 }
 643                 // Don't forget to accept the event!
 644                 e->accept();
 645                 return true;
 646         }
 647
 648         case QEvent::ShortcutOverride: {
 649                 // We catch this event in order to catch the Tab or Shift+Tab key press
 650                 // which are otherwise reserved to focus switching between controls
 651                 // within a dialog.
 652                 QKeyEvent * ke = static_cast<QKeyEvent*>(e);
 653                 if ((ke->key() != Qt::Key_Tab && ke->key() != Qt::Key_Backtab)
 654                         || ke->modifiers() & Qt::ControlModifier)
 655                         return QAbstractScrollArea::event(e);
 656                 keyPressEvent(ke);
 657                 return true;
 658         }
 659
 660         default:
 661                 return QAbstractScrollArea::event(e);
 662         }
 663         return false;
 664 }
 665
 666
 667 void GuiWorkArea::contextMenuEvent(QContextMenuEvent * e)
 668 {
 669         QPoint pos = e->pos();
 670         docstring name = buffer_view_->contextMenu(pos.x(), pos.y());
 671         if (name.empty()) {
 672                 QAbstractScrollArea::contextMenuEvent(e);
 673                 return;
 674         }
 675         QMenu * menu = guiApp->menus().menu(toqstr(name), *lyx_view_);
 676         if (!menu) {
 677                 QAbstractScrollArea::contextMenuEvent(e);
 678                 return;
 679         }
 680         // Position the menu to the right.
 681         // FIXME: menu position should be different for RTL text.
 682         menu->exec(e->globalPos());
 683         e->accept();
 684 }
 685
 686
 687 void GuiWorkArea::focusInEvent(QFocusEvent * e)
 688 {
 689         /*
 690         LYXERR(Debug::DEBUG, "GuiWorkArea::focusInEvent(): " << this << std::endl);
 691         GuiWorkArea * old_gwa = theGuiApp()->currentView()->currentWorkArea();
 692         if (old_gwa)
 693                 old_gwa->stopBlinkingCursor();
 694         lyx_view_->setCurrentWorkArea(this);
 695         */
 696
 697         if (lyx_view_->currentWorkArea() != this)
 698                 lyx_view_->setCurrentWorkArea(this);
 699
 700         startBlinkingCursor();
 701         QAbstractScrollArea::focusInEvent(e);
 702 }
 703
 704
 705 void GuiWorkArea::focusOutEvent(QFocusEvent * e)
 706 {
 707         LYXERR(Debug::DEBUG, "GuiWorkArea::focusOutEvent(): " << this << std::endl);
 708         stopBlinkingCursor();
 709         QAbstractScrollArea::focusOutEvent(e);
 710 }
 711
 712
 713 void GuiWorkArea::mousePressEvent(QMouseEvent * e)
 714 {
 715         if (dc_event_.active && dc_event_ == *e) {
 716                 dc_event_.active = false;
 717                 FuncRequest cmd(LFUN_MOUSE_TRIPLE, e->x(), e->y(),
 718                         q_button_state(e->button()));
 719                 dispatch(cmd);
 720                 e->accept();
 721                 return;
 722         }
 723
 724         inputContext()->reset();
 725
 726         FuncRequest const cmd(LFUN_MOUSE_PRESS, e->x(), e->y(),
 727                 q_button_state(e->button()));
 728         dispatch(cmd, q_key_state(e->modifiers()));
 729         e->accept();
 730 }
 731
 732
 733 void GuiWorkArea::mouseReleaseEvent(QMouseEvent * e)
 734 {
 735         if (synthetic_mouse_event_.timeout.running())
 736                 synthetic_mouse_event_.timeout.stop();
 737
 738         FuncRequest const cmd(LFUN_MOUSE_RELEASE, e->x(), e->y(),
 739                               q_button_state(e->button()));
 740         dispatch(cmd);
 741         e->accept();
 742 }
 743
 744
 745 void GuiWorkArea::mouseMoveEvent(QMouseEvent * e)
 746 {
 747         // we kill the triple click if we move
 748         doubleClickTimeout();
 749         FuncRequest cmd(LFUN_MOUSE_MOTION, e->x(), e->y(),
 750                 q_motion_state(e->buttons()));
 751
 752         e->accept();
 753
 754         // If we're above or below the work area...
 755         if (e->y() <= 20 || e->y() >= viewport()->height() - 20) {
 756                 // Make sure only a synthetic event can cause a page scroll,
 757                 // so they come at a steady rate:
 758                 if (e->y() <= 20)
 759                         // _Force_ a scroll up:
 760                         cmd.y = -40;
 761                 else
 762                         cmd.y = viewport()->height();
 763                 // Store the event, to be handled when the timeout expires.
 764                 synthetic_mouse_event_.cmd = cmd;
 765
 766                 if (synthetic_mouse_event_.timeout.running())
 767                         // Discard the event. Note that it _may_ be handled
 768                         // when the timeout expires if
 769                         // synthetic_mouse_event_.cmd has not been overwritten.
 770                         // Ie, when the timeout expires, we handle the
 771                         // most recent event but discard all others that
 772                         // occurred after the one used to start the timeout
 773                         // in the first place.
 774                         return;
 775
 776                 synthetic_mouse_event_.restart_timeout = true;
 777                 synthetic_mouse_event_.timeout.start();
 778                 // Fall through to handle this event...
 779
 780         } else if (synthetic_mouse_event_.timeout.running()) {
 781                 // Store the event, to be possibly handled when the timeout
 782                 // expires.
 783                 // Once the timeout has expired, normal control is returned
 784                 // to mouseMoveEvent (restart_timeout = false).
 785                 // This results in a much smoother 'feel' when moving the
 786                 // mouse back into the work area.
 787                 synthetic_mouse_event_.cmd = cmd;
 788                 synthetic_mouse_event_.restart_timeout = false;
 789                 return;
 790         }
 791
 792         // Has anything changed on-screen since the last QMouseEvent
 793         // was received?
 794         if (e->x() == synthetic_mouse_event_.x_old
 795                 && e->y() == synthetic_mouse_event_.y_old
 796                 && synthetic_mouse_event_.min_scrollbar_old == verticalScrollBar()->minimum()
 797                 && synthetic_mouse_event_.max_scrollbar_old == verticalScrollBar()->maximum()) {
 798                 // Nothing changed on-screen since the last QMouseEvent.
 799                 return;
 800         }
 801
 802         // Yes something has changed. Store the params used to check this.
 803         synthetic_mouse_event_.x_old = e->x();
 804         synthetic_mouse_event_.y_old = e->y();
 805         synthetic_mouse_event_.min_scrollbar_old = verticalScrollBar()->minimum();
 806         synthetic_mouse_event_.max_scrollbar_old = verticalScrollBar()->maximum();
 807
 808         // ... and dispatch the event to the LyX core.
 809         dispatch(cmd);
 810 }
 811
 812
 813 void GuiWorkArea::wheelEvent(QWheelEvent * ev)
 814 {
 815         // Wheel rotation by one notch results in a delta() of 120 (see
 816         // documentation of QWheelEvent)
 817         int const delta = ev->delta() / 120;
 818         if (ev->modifiers() & Qt::ControlModifier) {
 819                 docstring arg = convert<docstring>(5 * delta);
 820                 lyx::dispatch(FuncRequest(LFUN_BUFFER_ZOOM_IN, arg));
 821                 return;
 822         }
 823
 824         // Take into account the desktop wide settings.
 825         int const lines = qApp->wheelScrollLines();
 826         int const page_step = verticalScrollBar()->pageStep();
 827         // Test if the wheel mouse is set to one screen at a time.
 828         int scroll_value = lines > page_step
 829                 ? page_step : lines * verticalScrollBar()->singleStep();
 830
 831         // Take into account the rotation.
 832         scroll_value *= delta;
 833
 834         // Take into account user preference.
 835         scroll_value *= lyxrc.mouse_wheel_speed;
 836         LYXERR(Debug::SCROLLING, "wheelScrollLines = " << lines
 837                         << " delta = " << delta << " scroll_value = " << scroll_value
 838                         << " page_step = " << page_step);
 839         // Now scroll.
 840         verticalScrollBar()->setValue(verticalScrollBar()->value() - scroll_value);
 841
 842         ev->accept();
 843 }
 844
 845
 846 void GuiWorkArea::generateSyntheticMouseEvent()
 847 {
 848         // Set things off to generate the _next_ 'pseudo' event.
 849         if (synthetic_mouse_event_.restart_timeout)
 850                 synthetic_mouse_event_.timeout.start();
 851
 852         // Has anything changed on-screen since the last timeout signal
 853         // was received?
 854         int const min_scrollbar = verticalScrollBar()->minimum();
 855         int const max_scrollbar = verticalScrollBar()->maximum();
 856         if (min_scrollbar == synthetic_mouse_event_.min_scrollbar_old
 857                 && max_scrollbar == synthetic_mouse_event_.max_scrollbar_old) {
 858                 return;
 859         }
 860         // Yes it has. Store the params used to check this.
 861         synthetic_mouse_event_.min_scrollbar_old = min_scrollbar;
 862         synthetic_mouse_event_.max_scrollbar_old = max_scrollbar;
 863         // ... and dispatch the event to the LyX core.
 864         dispatch(synthetic_mouse_event_.cmd);
 865 }
 866
 867
 868 void GuiWorkArea::keyPressEvent(QKeyEvent * ev)
 869 {
 870         // Do not process here some keys if dialog_mode_ is set
 871         if (dialog_mode_
 872                 && (ev->modifiers() == Qt::NoModifier
 873                     || ev->modifiers() == Qt::ShiftModifier)
 874                 && (ev->key() == Qt::Key_Escape
 875                     || ev->key() == Qt::Key_Enter
 876                     || ev->key() == Qt::Key_Return)
 877             ) {
 878                 ev->ignore();
 879                 return;
 880         }
 881
 882         // intercept some keys if completion popup is visible
 883         if (completer_->popupVisible()) {
 884                 switch (ev->key()) {
 885                 case Qt::Key_Enter:
 886                 case Qt::Key_Return:
 887                         completer_->activate();
 888                         ev->accept();
 889                         return;
 890                 }
 891         }
 892
 893         // do nothing if there are other events
 894         // (the auto repeated events come too fast)
 895         // \todo FIXME: remove hard coded Qt keys, process the key binding
 896 #ifdef Q_WS_X11
 897         if (XEventsQueued(QX11Info::display(), 0) > 1 && ev->isAutoRepeat()
 898                         && (Qt::Key_PageDown || Qt::Key_PageUp)) {
 899                 LYXERR(Debug::KEY, "system is busy: scroll key event ignored");
 900                 ev->ignore();
 901                 return;
 902         }
 903 #endif
 904
 905         LYXERR(Debug::KEY, " count: " << ev->count() << " text: " << ev->text()
 906                 << " isAutoRepeat: " << ev->isAutoRepeat() << " key: " << ev->key());
 907
 908         KeySymbol sym;
 909         setKeySymbol(&sym, ev);
 910         processKeySym(sym, q_key_state(ev->modifiers()));
 911         ev->accept();
 912 }
 913
 914
 915 void GuiWorkArea::doubleClickTimeout()
 916 {
 917         dc_event_.active = false;
 918 }
 919
 920
 921 void GuiWorkArea::mouseDoubleClickEvent(QMouseEvent * ev)
 922 {
 923         dc_event_ = DoubleClick(ev);
 924         QTimer::singleShot(QApplication::doubleClickInterval(), this,
 925                            SLOT(doubleClickTimeout()));
 926         FuncRequest cmd(LFUN_MOUSE_DOUBLE,
 927                         ev->x(), ev->y(),
 928                         q_button_state(ev->button()));
 929         dispatch(cmd);
 930         ev->accept();
 931 }
 932
 933
 934 void GuiWorkArea::resizeEvent(QResizeEvent * ev)
 935 {
 936         QAbstractScrollArea::resizeEvent(ev);
 937         need_resize_ = true;
 938         ev->accept();
 939 }
 940
 941
 942 void GuiWorkArea::update(int x, int y, int w, int h)
 943 {
 944         viewport()->repaint(x, y, w, h);
 945 }
 946
 947
 948 void GuiWorkArea::paintEvent(QPaintEvent * ev)
 949 {
 950         QRect const rc = ev->rect();
 951         // LYXERR(Debug::PAINTING, "paintEvent begin: x: " << rc.x()
 952         //      << " y: " << rc.y() << " w: " << rc.width() << " h: " << rc.height());
 953
 954         if (need_resize_) {
 955                 screen_ = QPixmap(viewport()->width(), viewport()->height());
 956                 resizeBufferView();
 957                 hideCursor();
 958                 showCursor();
 959         }
 960
 961         QPainter pain(viewport());
 962         pain.drawPixmap(rc, screen_, rc);
 963         cursor_->draw(pain);
 964         ev->accept();
 965 }
 966
 967
 968 void GuiWorkArea::updateScreen()
 969 {
 970         GuiPainter pain(&screen_);
 971         buffer_view_->draw(pain);
 972 }
 973
 974
 975 void GuiWorkArea::showCursor(int x, int y, int h,
 976         bool l_shape, bool rtl, bool completable)
 977 {
 978         if (schedule_redraw_) {
 979                 // This happens when a graphic conversion is finished. As we don't know
 980                 // the size of the new graphics, it's better the update everything.
 981                 // We can't use redraw() here because this would trigger a infinite
 982                 // recursive loop with showCursor().
 983                 buffer_view_->resize(viewport()->width(), viewport()->height());
 984                 updateScreen();
 985                 updateScrollbar();
 986                 viewport()->update(QRect(0, 0, viewport()->width(), viewport()->height()));
 987                 schedule_redraw_ = false;
 988                 // Show the cursor immediately after the update.
 989                 hideCursor();
 990                 toggleCursor();
 991                 return;
 992         }
 993
 994         cursor_->update(x, y, h, l_shape, rtl, completable);
 995         cursor_->show();
 996         viewport()->update(cursor_->rect());
 997 }
 998
 999
1000 void GuiWorkArea::removeCursor()
1001 {
1002         cursor_->hide();
1003         //if (!qApp->focusWidget())
1004                 viewport()->update(cursor_->rect());
1005 }
1006
1007
1008 void GuiWorkArea::inputMethodEvent(QInputMethodEvent * e)
1009 {
1010         QString const & commit_string = e->commitString();
1011         docstring const & preedit_string
1012                 = qstring_to_ucs4(e->preeditString());
1013
1014         if (!commit_string.isEmpty()) {
1015
1016                 LYXERR(Debug::KEY, "preeditString: " << e->preeditString()
1017                         << " commitString: " << e->commitString());
1018
1019                 int key = 0;
1020
1021                 // FIXME Iwami 04/01/07: we should take care also of UTF16 surrogates here.
1022                 for (int i = 0; i != commit_string.size(); ++i) {
1023                         QKeyEvent ev(QEvent::KeyPress, key, Qt::NoModifier, commit_string[i]);
1024                         keyPressEvent(&ev);
1025                 }
1026         }
1027
1028         // Hide the cursor during the kana-kanji transformation.
1029         if (preedit_string.empty())
1030                 startBlinkingCursor();
1031         else
1032                 stopBlinkingCursor();
1033
1034         // last_width : for checking if last preedit string was/wasn't empty.
1035         static bool last_width = false;
1036         if (!last_width && preedit_string.empty()) {
1037                 // if last_width is last length of preedit string.
1038                 e->accept();
1039                 return;
1040         }
1041
1042         GuiPainter pain(&screen_);
1043         buffer_view_->updateMetrics();
1044         buffer_view_->draw(pain);
1045         FontInfo font = buffer_view_->cursor().getFont().fontInfo();
1046         FontMetrics const & fm = theFontMetrics(font);
1047         int height = fm.maxHeight();
1048         int cur_x = cursor_->rect().left();
1049         int cur_y = cursor_->rect().bottom();
1050
1051         // redraw area of preedit string.
1052         update(0, cur_y - height, viewport()->width(),
1053                 (height + 1) * preedit_lines_);
1054
1055         if (preedit_string.empty()) {
1056                 last_width = false;
1057                 preedit_lines_ = 1;
1058                 e->accept();
1059                 return;
1060         }
1061         last_width = true;
1062
1063         // att : stores an IM attribute.
1064         QList<QInputMethodEvent::Attribute> const & att = e->attributes();
1065
1066         // get attributes of input method cursor.
1067         // cursor_pos : cursor position in preedit string.
1068         size_t cursor_pos = 0;
1069         bool cursor_is_visible = false;
1070         for (int i = 0; i != att.size(); ++i) {
1071                 if (att.at(i).type == QInputMethodEvent::Cursor) {
1072                         cursor_pos = att.at(i).start;
1073                         cursor_is_visible = att.at(i).length != 0;
1074                         break;
1075                 }
1076         }
1077
1078         size_t preedit_length = preedit_string.length();
1079
1080         // get position of selection in input method.
1081         // FIXME: isn't there a way to do this simplier?
1082         // rStart : cursor position in selected string in IM.
1083         size_t rStart = 0;
1084         // rLength : selected string length in IM.
1085         size_t rLength = 0;
1086         if (cursor_pos < preedit_length) {
1087                 for (int i = 0; i != att.size(); ++i) {
1088                         if (att.at(i).type == QInputMethodEvent::TextFormat) {
1089                                 if (att.at(i).start <= int(cursor_pos)
1090                                         && int(cursor_pos) < att.at(i).start + att.at(i).length) {
1091                                                 rStart = att.at(i).start;
1092                                                 rLength = att.at(i).length;
1093                                                 if (!cursor_is_visible)
1094                                                         cursor_pos += rLength;
1095                                                 break;
1096                                 }
1097                         }
1098                 }
1099         }
1100         else {
1101                 rStart = cursor_pos;
1102                 rLength = 0;
1103         }
1104
1105         int const right_margin = buffer_view_->rightMargin();
1106         Painter::preedit_style ps;
1107         // Most often there would be only one line:
1108         preedit_lines_ = 1;
1109         for (size_t pos = 0; pos != preedit_length; ++pos) {
1110                 char_type const typed_char = preedit_string[pos];
1111                 // reset preedit string style
1112                 ps = Painter::preedit_default;
1113
1114                 // if we reached the right extremity of the screen, go to next line.
1115                 if (cur_x + fm.width(typed_char) > viewport()->width() - right_margin) {
1116                         cur_x = right_margin;
1117                         cur_y += height + 1;
1118                         ++preedit_lines_;
1119                 }
1120                 // preedit strings are displayed with dashed underline
1121                 // and partial strings are displayed white on black indicating
1122                 // that we are in selecting mode in the input method.
1123                 // FIXME: rLength == preedit_length is not a changing condition
1124                 // FIXME: should be put out of the loop.
1125                 if (pos >= rStart
1126                         && pos < rStart + rLength
1127                         && !(cursor_pos < rLength && rLength == preedit_length))
1128                         ps = Painter::preedit_selecting;
1129
1130                 if (pos == cursor_pos
1131                         && (cursor_pos < rLength && rLength == preedit_length))
1132                         ps = Painter::preedit_cursor;
1133
1134                 // draw one character and update cur_x.
1135                 cur_x += pain.preeditText(cur_x, cur_y, typed_char, font, ps);
1136         }
1137
1138         // update the preedit string screen area.
1139         update(0, cur_y - preedit_lines_*height, viewport()->width(),
1140                 (height + 1) * preedit_lines_);
1141
1142         // Don't forget to accept the event!
1143         e->accept();
1144 }
1145
1146
1147 QVariant GuiWorkArea::inputMethodQuery(Qt::InputMethodQuery query) const
1148 {
1149         QRect cur_r(0, 0, 0, 0);
1150         switch (query) {
1151                 // this is the CJK-specific composition window position.
1152                 case Qt::ImMicroFocus:
1153                         cur_r = cursor_->rect();
1154                         if (preedit_lines_ != 1)
1155                                 cur_r.moveLeft(10);
1156                         cur_r.moveBottom(cur_r.bottom() + cur_r.height() * preedit_lines_);
1157                         // return lower right of cursor in LyX.
1158                         return cur_r;
1159                 default:
1160                         return QWidget::inputMethodQuery(query);
1161         }
1162 }
1163
1164
1165 void GuiWorkArea::updateWindowTitle()
1166 {
1167         docstring maximize_title;
1168         docstring minimize_title;
1169
1170         Buffer & buf = buffer_view_->buffer();
1171         FileName const fileName = buf.fileName();
1172         if (!fileName.empty()) {
1173                 maximize_title = fileName.displayName(30);
1174                 minimize_title = from_utf8(fileName.onlyFileName());
1175                 if (buf.lyxvc().inUse()) {
1176                         if (buf.lyxvc().locker().empty())
1177                                 maximize_title +=  _(" (version control)");
1178                         else
1179                                 maximize_title +=  _(" (version control, locking)");
1180                 }
1181                 if (!buf.isClean()) {
1182                         maximize_title += _(" (changed)");
1183                         minimize_title += char_type('*');
1184                 }
1185                 if (buf.isReadonly())
1186                         maximize_title += _(" (read only)");
1187         }
1188
1189         QString title = windowTitle();
1190         QString new_title = toqstr(maximize_title);
1191         if (title == new_title)
1192                 return;
1193
1194         QWidget::setWindowTitle(new_title);
1195         QWidget::setWindowIconText(toqstr(minimize_title));
1196         titleChanged(this);
1197 }
1198
1199
1200 void GuiWorkArea::setReadOnly(bool)
1201 {
1202         updateWindowTitle();
1203         if (this == lyx_view_->currentWorkArea())
1204                 lyx_view_->updateDialogs();
1205 }
1206
1207
1208 bool GuiWorkArea::isFullScreen()
1209 {
1210         return lyx_view_ && lyx_view_->isFullScreen();
1211 }
1212
1213
1214 ////////////////////////////////////////////////////////////////////
1215 //
1216 // EmbeddedWorkArea
1217 //
1218 ////////////////////////////////////////////////////////////////////
1219
1220
1221 EmbeddedWorkArea::EmbeddedWorkArea(QWidget * w): GuiWorkArea(w)
1222 {
1223         buffer_ = theBufferList().newBuffer(
1224                 support::FileName::tempName().absFilename() + "_embedded.internal");
1225         buffer_->setUnnamed(true);
1226         buffer_->setFullyLoaded(true);
1227         setBuffer(*buffer_);
1228         setDialogMode(true);
1229 }
1230
1231
1232 EmbeddedWorkArea::~EmbeddedWorkArea()
1233 {
1234         // No need to destroy buffer and bufferview here, because it is done
1235         // in theBuffeerList() destruction loop at application exit
1236 }
1237
1238
1239 void EmbeddedWorkArea::closeEvent(QCloseEvent * ev)
1240 {
1241         disable();
1242         GuiWorkArea::closeEvent(ev);
1243 }
1244
1245
1246 void EmbeddedWorkArea::hideEvent(QHideEvent * ev)
1247 {
1248         disable();
1249         GuiWorkArea::hideEvent(ev);
1250 }
1251
1252
1253 void EmbeddedWorkArea::disable()
1254 {
1255         stopBlinkingCursor();
1256         if (view().currentWorkArea() != this)
1257                 return;
1258         LASSERT(view().currentMainWorkArea(), /* */);
1259         view().setCurrentWorkArea(view().currentMainWorkArea());
1260 }
1261
1262 ////////////////////////////////////////////////////////////////////
1263 //
1264 // TabWorkArea
1265 //
1266 ////////////////////////////////////////////////////////////////////
1267
1268 #ifdef Q_WS_MACX
1269 class NoTabFrameMacStyle : public QMacStyle {
1270 public:
1271         ///
1272         QRect subElementRect(SubElement element, const QStyleOption * option,
1273                              const QWidget * widget = 0) const
1274         {
1275                 QRect rect = QMacStyle::subElementRect(element, option, widget);
1276                 bool noBar = static_cast<QTabWidget const *>(widget)->count() <= 1;
1277
1278                 // The Qt Mac style puts the contents into a 3 pixel wide box
1279                 // which looks very ugly and not like other Mac applications.
1280                 // Hence we remove this here, and moreover the 16 pixel round
1281                 // frame above if the tab bar is hidden.
1282                 if (element == QStyle::SE_TabWidgetTabContents) {
1283                         rect.adjust(- rect.left(), 0, rect.left(), 0);
1284                         if (noBar)
1285                                 rect.setTop(0);
1286                 }
1287
1288                 return rect;
1289         }
1290 };
1291
1292 NoTabFrameMacStyle noTabFrameMacStyle;
1293 #endif
1294
1295
1296 TabWorkArea::TabWorkArea(QWidget * parent)
1297         : QTabWidget(parent), clicked_tab_(-1)
1298 {
1299 #ifdef Q_WS_MACX
1300         setStyle(&noTabFrameMacStyle);
1301 #endif
1302
1303         QPalette pal = palette();
1304         pal.setColor(QPalette::Active, QPalette::Button,
1305                 pal.color(QPalette::Active, QPalette::Window));
1306         pal.setColor(QPalette::Disabled, QPalette::Button,
1307                 pal.color(QPalette::Disabled, QPalette::Window));
1308         pal.setColor(QPalette::Inactive, QPalette::Button,
1309                 pal.color(QPalette::Inactive, QPalette::Window));
1310
1311         QObject::connect(this, SIGNAL(currentChanged(int)),
1312                 this, SLOT(on_currentTabChanged(int)));
1313
1314 #if QT_VERSION < 0x040500
1315         closeBufferButton = new QToolButton(this);
1316         closeBufferButton->setPalette(pal);
1317         // FIXME: rename the icon to closebuffer.png
1318         closeBufferButton->setIcon(QIcon(getPixmap("images/", "closetab", "png")));
1319         closeBufferButton->setText("Close File");
1320         closeBufferButton->setAutoRaise(true);
1321         closeBufferButton->setCursor(Qt::ArrowCursor);
1322         closeBufferButton->setToolTip(qt_("Close File"));
1323         closeBufferButton->setEnabled(true);
1324         QObject::connect(closeBufferButton, SIGNAL(clicked()),
1325                 this, SLOT(closeCurrentBuffer()));
1326         setCornerWidget(closeBufferButton, Qt::TopRightCorner);
1327 #endif
1328
1329         // setup drag'n'drop
1330         QTabBar* tb = new DragTabBar;
1331         connect(tb, SIGNAL(tabMoveRequested(int, int)),
1332                 this, SLOT(moveTab(int, int)));
1333         tb->setElideMode(Qt::ElideNone);
1334         setTabBar(tb);
1335
1336         // make us responsible for the context menu of the tabbar
1337         tb->setContextMenuPolicy(Qt::CustomContextMenu);
1338         connect(tb, SIGNAL(customContextMenuRequested(const QPoint &)),
1339                 this, SLOT(showContextMenu(const QPoint &)));
1340 #if QT_VERSION >= 0x040500
1341         connect(tb, SIGNAL(tabCloseRequested(int)),
1342                 tb, SLOT(on_tabCloseRequested(int)));
1343 #endif
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 #if QT_VERSION < 0x040500
1366         closeBufferButton->setVisible(show);
1367 #endif
1368 }
1369
1370
1371 GuiWorkArea * TabWorkArea::currentWorkArea()
1372 {
1373         if (count() == 0)
1374                 return 0;
1375
1376         GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(currentWidget());
1377         LASSERT(wa, /**/);
1378         return wa;
1379 }
1380
1381
1382 GuiWorkArea * TabWorkArea::workArea(Buffer & buffer)
1383 {
1384         for (int i = 0; i != count(); ++i) {
1385                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1386                 LASSERT(wa, return 0);
1387                 if (&wa->bufferView().buffer() == &buffer)
1388                         return wa;
1389         }
1390         return 0;
1391 }
1392
1393
1394 void TabWorkArea::closeAll()
1395 {
1396         while (count()) {
1397                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(0));
1398                 LASSERT(wa, /**/);
1399                 removeTab(0);
1400                 delete wa;
1401         }
1402 }
1403
1404
1405 bool TabWorkArea::setCurrentWorkArea(GuiWorkArea * work_area)
1406 {
1407         LASSERT(work_area, /**/);
1408         int index = indexOf(work_area);
1409         if (index == -1)
1410                 return false;
1411
1412         if (index == currentIndex())
1413                 // Make sure the work area is up to date.
1414                 on_currentTabChanged(index);
1415         else
1416                 // Switch to the work area.
1417                 setCurrentIndex(index);
1418         work_area->setFocus();
1419
1420         return true;
1421 }
1422
1423
1424 GuiWorkArea * TabWorkArea::addWorkArea(Buffer & buffer, GuiView & view)
1425 {
1426         GuiWorkArea * wa = new GuiWorkArea(buffer, view);
1427         wa->setUpdatesEnabled(false);
1428         // Hide tabbar if there's no tab (avoid a resize and a flashing tabbar
1429         // when hiding it again below).
1430         if (!(currentWorkArea() && currentWorkArea()->isFullScreen()))
1431                 showBar(count() > 0);
1432         addTab(wa, wa->windowTitle());
1433         QObject::connect(wa, SIGNAL(titleChanged(GuiWorkArea *)),
1434                 this, SLOT(updateTabTexts()));
1435         if (currentWorkArea() && currentWorkArea()->isFullScreen())
1436                 setFullScreen(true);
1437         else
1438                 // Hide tabbar if there's only one tab.
1439                 showBar(count() > 1);
1440
1441         updateTabTexts();
1442
1443         return wa;
1444 }
1445
1446
1447 bool TabWorkArea::removeWorkArea(GuiWorkArea * work_area)
1448 {
1449         LASSERT(work_area, return false);
1450         int index = indexOf(work_area);
1451         if (index == -1)
1452                 return false;
1453
1454         work_area->setUpdatesEnabled(false);
1455         removeTab(index);
1456         delete work_area;
1457
1458         if (count()) {
1459                 // make sure the next work area is enabled.
1460                 currentWidget()->setUpdatesEnabled(true);
1461                 if (currentWorkArea() && currentWorkArea()->isFullScreen())
1462                         setFullScreen(true);
1463                 else
1464                         // Show tabbar only if there's more than one tab.
1465                         showBar(count() > 1);
1466         } else {
1467                 lastWorkAreaRemoved();
1468         }
1469
1470         updateTabTexts();
1471
1472         return true;
1473 }
1474
1475
1476 void TabWorkArea::on_currentTabChanged(int i)
1477 {
1478         // returns e.g. on application destruction
1479         if (i == -1)
1480                 return;
1481         GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
1482         LASSERT(wa, return);
1483         BufferView & bv = wa->bufferView();
1484         bv.cursor().fixIfBroken();
1485         bv.updateMetrics();
1486         wa->setUpdatesEnabled(true);
1487         wa->redraw();
1488         wa->setFocus();
1489         ///
1490         currentWorkAreaChanged(wa);
1491
1492         LYXERR(Debug::GUI, "currentTabChanged " << i
1493                 << "File" << bv.buffer().absFileName());
1494 }
1495
1496
1497 void TabWorkArea::closeCurrentBuffer()
1498 {
1499         if (clicked_tab_ != -1)
1500                 setCurrentIndex(clicked_tab_);
1501         else
1502                 // Before dispatching the LFUN we should be sure this
1503                 // is the current workarea.
1504                 currentWorkAreaChanged(currentWorkArea());
1505
1506         lyx::dispatch(FuncRequest(LFUN_BUFFER_CLOSE));
1507 }
1508
1509
1510 void TabWorkArea::closeCurrentTab()
1511 {
1512         if (clicked_tab_ == -1)
1513                 removeWorkArea(currentWorkArea());
1514         else {
1515                 GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(clicked_tab_));
1516                 LASSERT(wa, /**/);
1517                 removeWorkArea(wa);
1518         }
1519 }
1520
1521 ///
1522 class DisplayPath {
1523 public:
1524         /// make vector happy
1525         DisplayPath() {}
1526         ///
1527         DisplayPath(int tab, FileName const & filename)
1528                 : tab_(tab)
1529         {
1530                 filename_ = toqstr(filename.onlyFileNameWithoutExt());
1531                 postfix_ = toqstr(filename.absoluteFilePath()).
1532                         split("/", QString::SkipEmptyParts);
1533                 postfix_.pop_back();
1534                 abs_ = toqstr(filename.absoluteFilePath());
1535                 dottedPrefix_ = false;
1536         }
1537
1538         /// Absolute path for debugging.
1539         QString abs() const
1540         {
1541                 return abs_;
1542         }
1543         /// Add the first segment from the postfix or three dots to the prefix.
1544         /// Merge multiple dot tripples. In fact dots are added lazily, i.e. only
1545         /// when really needed.
1546         void shiftPathSegment(bool dotted)
1547         {
1548                 if (postfix_.count() <= 0)
1549                         return;
1550
1551                 if (!dotted) {
1552                         if (dottedPrefix_ && !prefix_.isEmpty())
1553                                 prefix_ += ".../";
1554                         prefix_ += postfix_.front() + "/";
1555                 }
1556                 dottedPrefix_ = dotted && !prefix_.isEmpty();
1557                 postfix_.pop_front();
1558         }
1559         ///
1560         QString displayString() const
1561         {
1562                 if (prefix_.isEmpty())
1563                         return filename_;
1564
1565                 bool dots = dottedPrefix_ || !postfix_.isEmpty();
1566                 return prefix_ + (dots ? ".../" : "") + filename_;
1567         }
1568         ///
1569         QString forecastPathString() const
1570         {
1571                 if (postfix_.count() == 0)
1572                         return displayString();
1573
1574                 return prefix_
1575                         + (dottedPrefix_ ? ".../" : "")
1576                         + postfix_.front() + "/";
1577         }
1578         ///
1579         bool final() const { return postfix_.empty(); }
1580         ///
1581         int tab() const { return tab_; }
1582
1583 private:
1584         ///
1585         QString prefix_;
1586         ///
1587         QStringList postfix_;
1588         ///
1589         QString filename_;
1590         ///
1591         QString abs_;
1592         ///
1593         int tab_;
1594         ///
1595         bool dottedPrefix_;
1596 };
1597
1598
1599 ///
1600 bool operator<(DisplayPath const & a, DisplayPath const & b)
1601 {
1602         return a.displayString() < b.displayString();
1603 }
1604
1605 ///
1606 bool operator==(DisplayPath const & a, DisplayPath const & b)
1607 {
1608         return a.displayString() == b.displayString();
1609 }
1610
1611
1612 void TabWorkArea::updateTabTexts()
1613 {
1614         size_t n = count();
1615         if (n == 0)
1616                 return;
1617         std::list<DisplayPath> paths;
1618         typedef std::list<DisplayPath>::iterator It;
1619
1620         // collect full names first: path into postfix, empty prefix and
1621         // filename without extension
1622         for (size_t i = 0; i < n; ++i) {
1623                 GuiWorkArea * i_wa = dynamic_cast<GuiWorkArea *>(widget(i));
1624                 FileName const fn = i_wa->bufferView().buffer().fileName();
1625                 paths.push_back(DisplayPath(i, fn));
1626         }
1627
1628         // go through path segments and see if it helps to make the path more unique
1629         bool somethingChanged = true;
1630         bool allFinal = false;
1631         while (somethingChanged && !allFinal) {
1632                 // adding path segments changes order
1633                 paths.sort();
1634
1635                 LYXERR(Debug::GUI, "updateTabTexts() iteration start");
1636                 somethingChanged = false;
1637                 allFinal = true;
1638
1639                 // find segments which are not unique (i.e. non-atomic)
1640                 It it = paths.begin();
1641                 It segStart = it;
1642                 QString segString = it->displayString();
1643                 for (; it != paths.end(); ++it) {
1644                         // look to the next item
1645                         It next = it;
1646                         ++next;
1647
1648                         // final?
1649                         allFinal = allFinal && it->final();
1650
1651                         LYXERR(Debug::GUI, "it = " << it->abs()
1652                                << " => " << it->displayString());
1653
1654                         // still the same segment?
1655                         QString nextString;
1656                         if ((next != paths.end()
1657                              && (nextString = next->displayString()) == segString))
1658                                 continue;
1659                         LYXERR(Debug::GUI, "segment ended");
1660
1661                         // only a trivial one with one element?
1662                         if (it == segStart) {
1663                                 // start new segment
1664                                 segStart = next;
1665                                 segString = nextString;
1666                                 continue;
1667                         }
1668
1669                         // we found a non-atomic segment segStart <= sit <= it < next.
1670                         // Shift path segments and hope for the best
1671                         // that it makes the path more unique.
1672                         somethingChanged = true;
1673                         It sit = segStart;
1674                         QString dspString = sit->forecastPathString();
1675                         LYXERR(Debug::GUI, "first forecast found for "
1676                                << sit->abs() << " => " << dspString);
1677                         ++sit;
1678                         bool moreUnique = false;
1679                         for (; sit != next; ++sit) {
1680                                 if (sit->forecastPathString() != dspString) {
1681                                         LYXERR(Debug::GUI, "different forecast found for "
1682                                                 << sit->abs() << " => " << sit->forecastPathString());
1683                                         moreUnique = true;
1684                                         break;
1685                                 }
1686                                 LYXERR(Debug::GUI, "same forecast found for "
1687                                         << sit->abs() << " => " << dspString);
1688                         }
1689
1690                         // if the path segment helped, add it. Otherwise add dots
1691                         bool dots = !moreUnique;
1692                         LYXERR(Debug::GUI, "using dots = " << dots);
1693                         for (sit = segStart; sit != next; ++sit) {
1694                                 sit->shiftPathSegment(dots);
1695                                 LYXERR(Debug::GUI, "shifting "
1696                                         << sit->abs() << " => " << sit->displayString());
1697                         }
1698
1699                         // start new segment
1700                         segStart = next;
1701                         segString = nextString;
1702                 }
1703         }
1704
1705         // set new tab titles
1706         for (It it = paths.begin(); it != paths.end(); ++it) {
1707                 GuiWorkArea * i_wa = dynamic_cast<GuiWorkArea *>(widget(it->tab()));
1708                 Buffer & buf = i_wa->bufferView().buffer();
1709                 if (!buf.fileName().empty() && !buf.isClean())
1710                         setTabText(it->tab(), it->displayString() + "*");
1711                 else
1712                         setTabText(it->tab(), it->displayString());
1713         }
1714 }
1715
1716
1717 void TabWorkArea::showContextMenu(const QPoint & pos)
1718 {
1719         // which tab?
1720         clicked_tab_ = static_cast<DragTabBar *>(tabBar())->tabAt(pos);
1721         if (clicked_tab_ == -1)
1722                 return;
1723
1724         // show tab popup
1725         QMenu popup;
1726         popup.addAction(QIcon(getPixmap("images/", "hidetab", "png")),
1727                 qt_("Hide tab"), this, SLOT(closeCurrentTab()));
1728         popup.addAction(QIcon(getPixmap("images/", "closetab", "png")),
1729                 qt_("Close tab"), this, SLOT(closeCurrentBuffer()));
1730         popup.exec(tabBar()->mapToGlobal(pos));
1731
1732         clicked_tab_ = -1;
1733 }
1734
1735
1736 void TabWorkArea::moveTab(int fromIndex, int toIndex)
1737 {
1738         QWidget * w = widget(fromIndex);
1739         QIcon icon = tabIcon(fromIndex);
1740         QString text = tabText(fromIndex);
1741
1742         setCurrentIndex(fromIndex);
1743         removeTab(fromIndex);
1744         insertTab(toIndex, w, icon, text);
1745         setCurrentIndex(toIndex);
1746 }
1747
1748
1749 DragTabBar::DragTabBar(QWidget* parent)
1750         : QTabBar(parent)
1751 {
1752         setAcceptDrops(true);
1753 #if QT_VERSION >= 0x040500
1754         setTabsClosable(true);
1755 #endif
1756 }
1757
1758
1759 void DragTabBar::on_tabCloseRequested(int index)
1760 {
1761         setCurrentIndex(index);
1762         lyx::dispatch(FuncRequest(LFUN_BUFFER_CLOSE));
1763 }
1764
1765
1766 #if QT_VERSION < 0x040300
1767 int DragTabBar::tabAt(QPoint const & position) const
1768 {
1769         const int max = count();
1770         for (int i = 0; i < max; ++i) {
1771                 if (tabRect(i).contains(position))
1772                         return i;
1773         }
1774         return -1;
1775 }
1776 #endif
1777
1778
1779 void DragTabBar::mousePressEvent(QMouseEvent * event)
1780 {
1781         if (event->button() == Qt::LeftButton)
1782                 dragStartPos_ = event->pos();
1783         QTabBar::mousePressEvent(event);
1784 }
1785
1786
1787 void DragTabBar::mouseMoveEvent(QMouseEvent * event)
1788 {
1789         // If the left button isn't pressed anymore then return
1790         if (!(event->buttons() & Qt::LeftButton))
1791                 return;
1792
1793         // If the distance is too small then return
1794         if ((event->pos() - dragStartPos_).manhattanLength()
1795             < QApplication::startDragDistance())
1796                 return;
1797
1798         // did we hit something after all?
1799         int tab = tabAt(dragStartPos_);
1800         if (tab == -1)
1801                 return;
1802
1803         // simulate button release to remove highlight from button
1804         int i = currentIndex();
1805         QMouseEvent me(QEvent::MouseButtonRelease, dragStartPos_,
1806                 event->button(), event->buttons(), 0);
1807         QTabBar::mouseReleaseEvent(&me);
1808         setCurrentIndex(i);
1809
1810         // initiate Drag
1811         QDrag * drag = new QDrag(this);
1812         QMimeData * mimeData = new QMimeData;
1813         // a crude way to distinguish tab-reodering drops from other ones
1814         mimeData->setData("action", "tab-reordering") ;
1815         drag->setMimeData(mimeData);
1816
1817 #if QT_VERSION >= 0x040300
1818         // get tab pixmap as cursor
1819         QRect r = tabRect(tab);
1820         QPixmap pixmap(r.size());
1821         render(&pixmap, - r.topLeft());
1822         drag->setPixmap(pixmap);
1823         drag->exec();
1824 #else
1825         drag->start(Qt::MoveAction);
1826 #endif
1827
1828 }
1829
1830
1831 void DragTabBar::dragEnterEvent(QDragEnterEvent * event)
1832 {
1833         // Only accept if it's an tab-reordering request
1834         QMimeData const * m = event->mimeData();
1835         QStringList formats = m->formats();
1836         if (formats.contains("action")
1837             && m->data("action") == "tab-reordering")
1838                 event->acceptProposedAction();
1839 }
1840
1841
1842 void DragTabBar::dropEvent(QDropEvent * event)
1843 {
1844         int fromIndex = tabAt(dragStartPos_);
1845         int toIndex = tabAt(event->pos());
1846
1847         // Tell interested objects that
1848         if (fromIndex != toIndex)
1849                 tabMoveRequested(fromIndex, toIndex);
1850         event->acceptProposedAction();
1851 }
1852
1853
1854 } // namespace frontend
1855 } // namespace lyx
1856
1857 #include "moc_GuiWorkArea.cpp"