src/frontends/qt4/GuiCompleter.cpp

   1 /**
   2  * \file GuiCompleter.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Stefan Schimanski
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "GuiWorkArea.h"
  14
  15 #include "Buffer.h"
  16 #include "BufferView.h"
  17 #include "Cursor.h"
  18 #include "Dimension.h"
  19 #include "FuncRequest.h"
  20 #include "GuiView.h"
  21 #include "LyXFunc.h"
  22 #include "LyXRC.h"
  23 #include "Paragraph.h"
  24 #include "version.h"
  25
  26 #include "support/debug.h"
  27
  28 #include <QApplication>
  29 #include <QAbstractListModel>
  30 #include <QHeaderView>
  31 #include <QPainter>
  32 #include <QPixmapCache>
  33 #include <QScrollBar>
  34 #include <QItemDelegate>
  35 #include <QTreeView>
  36 #include <QTimer>
  37
  38 using namespace std;
  39 using namespace lyx::support;
  40
  41 namespace lyx {
  42 namespace frontend {
  43
  44 class RtlItemDelegate : public QItemDelegate {
  45 public:
  46         explicit RtlItemDelegate(QObject * parent = 0)
  47                 : QItemDelegate(parent) {}
  48
  49 protected:
  50         virtual void drawDisplay(QPainter * painter,
  51                 QStyleOptionViewItem const & option,
  52                 QRect const & rect, QString const & text) const
  53         {
  54                 // FIXME: do this more elegantly
  55                 docstring stltext = qstring_to_ucs4(text);
  56                 reverse(stltext.begin(), stltext.end());
  57                 QItemDelegate::drawDisplay(painter, option, rect, toqstr(stltext));
  58         }
  59 };
  60
  61
  62 class PixmapItemDelegate : public QItemDelegate {
  63 public:
  64         explicit PixmapItemDelegate(QObject *parent = 0)
  65         : QItemDelegate(parent) {}
  66
  67 protected:
  68         void paint(QPainter *painter, const QStyleOptionViewItem &option,
  69                    const QModelIndex &index) const
  70         {
  71                 QStyleOptionViewItem opt = setOptions(index, option);
  72                 QVariant value = index.data(Qt::DisplayRole);
  73                 QPixmap pixmap = qvariant_cast<QPixmap>(value);
  74
  75                 // draw
  76                 painter->save();
  77                 drawBackground(painter, opt, index);
  78                 if (!pixmap.isNull()) {
  79                         const QSize size = pixmap.size();
  80                         painter->drawPixmap(option.rect.left() + (16 - size.width()) / 2,
  81                                 option.rect.top() + (option.rect.height() - size.height()) / 2,
  82                                 pixmap);
  83                 }
  84                 drawFocus(painter, opt, option.rect);
  85                 painter->restore();
  86         }
  87 };
  88
  89
  90 class GuiCompletionModel : public QAbstractListModel {
  91 public:
  92         ///
  93         GuiCompletionModel(QObject * parent,
  94                 Inset::CompletionList const * l)
  95                 : QAbstractListModel(parent), list_(l) {}
  96         ///
  97         ~GuiCompletionModel()
  98                 { delete list_; }
  99         ///
 100         bool sorted() const
 101         {
 102                 if (list_)
 103                         return list_->sorted();
 104                 else
 105                         return false;
 106         }
 107         ///
 108         int columnCount(const QModelIndex & /*parent*/ = QModelIndex()) const
 109         {
 110                 return 2;
 111         }
 112         ///
 113         int rowCount(const QModelIndex & /*parent*/ = QModelIndex()) const
 114         {
 115                 if (list_ == 0)
 116                         return 0;
 117                 else
 118                         return list_->size();
 119         }
 120
 121         ///
 122         QVariant data(const QModelIndex & index, int role) const
 123         {
 124                 if (list_ == 0)
 125                         return QVariant();
 126
 127                 if (index.row() < 0 || index.row() >= rowCount())
 128                         return QVariant();
 129
 130                 if (role != Qt::DisplayRole && role != Qt::EditRole)
 131                     return QVariant();
 132
 133                 if (index.column() == 0) {
 134                         docstring const word = list_->data(index.row());
 135                         return toqstr(word);
 136                 } else if (index.column() == 1) {
 137                         // get icon from cache
 138                         QPixmap scaled;
 139                         QString const name = ":" + toqstr(list_->icon(index.row()));
 140                         if (!QPixmapCache::find("completion" + name, scaled)) {
 141                                 // load icon from disk
 142                                 QPixmap p = QPixmap(name);
 143                                 if (!p.isNull()) {
 144                                         // scale it to 16x16 or smaller
 145                                         scaled = p.scaled(min(16, p.width()), min(16, p.height()),
 146                                                 Qt::KeepAspectRatio, Qt::SmoothTransformation);
 147                                 }
 148
 149                                 QPixmapCache::insert("completion" + name, scaled);
 150                         }
 151                         return scaled;
 152                 }
 153                 return QVariant();
 154         }
 155
 156 private:
 157         ///
 158         Inset::CompletionList const * list_;
 159 };
 160
 161
 162 GuiCompleter::GuiCompleter(GuiWorkArea * gui, QObject * parent)
 163         : QCompleter(parent), gui_(gui), updateLock_(0),
 164           inlineVisible_(false)
 165 {
 166         // Setup the completion popup
 167         setModel(new GuiCompletionModel(this, 0));
 168         setCompletionMode(QCompleter::PopupCompletion);
 169         setWidget(gui_);
 170
 171         // create the popup
 172         QTreeView *listView = new QTreeView;
 173         listView->setEditTriggers(QAbstractItemView::NoEditTriggers);
 174         listView->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 175         listView->setSelectionBehavior(QAbstractItemView::SelectRows);
 176         listView->setSelectionMode(QAbstractItemView::SingleSelection);
 177         listView->header()->hide();
 178         listView->setIndentation(0);
 179         listView->setUniformRowHeights(true);
 180         setPopup(listView);
 181         popup()->setItemDelegateForColumn(1, new PixmapItemDelegate(this));
 182         rtlItemDelegate_ = new RtlItemDelegate(this);
 183
 184         // create timeout timers
 185         popup_timer_.setSingleShot(true);
 186         inline_timer_.setSingleShot(true);
 187         connect(this, SIGNAL(highlighted(const QString &)),
 188                 this, SLOT(popupHighlighted(const QString &)));
 189         connect(this, SIGNAL(activated(const QString &)),
 190                 this, SLOT(popupActivated(const QString &)));
 191         connect(&popup_timer_, SIGNAL(timeout()),
 192                 this, SLOT(showPopup()));
 193         connect(&inline_timer_, SIGNAL(timeout()),
 194                 this, SLOT(showInline()));
 195 }
 196
 197
 198 GuiCompleter::~GuiCompleter()
 199 {
 200         popup()->hide();
 201 }
 202
 203
 204 bool GuiCompleter::eventFilter(QObject * watched, QEvent * e)
 205 {
 206         // hijack back the tab key from the popup
 207         // (which stole it from the workspace before)
 208         if (e->type() == QEvent::KeyPress && popupVisible()) {
 209                 QKeyEvent *ke = static_cast<QKeyEvent *>(e);
 210                 switch (ke->key()) {
 211                 case Qt::Key_Tab:
 212                         tab();
 213                         ke->accept();
 214                         return true;
 215                 default: break;
 216                 }
 217         }
 218
 219         return QCompleter::eventFilter(watched, e);
 220 }
 221
 222
 223 bool GuiCompleter::popupPossible(Cursor const & cur) const
 224 {
 225         return QApplication::activeWindow()
 226                 && gui_->hasFocus()
 227                 && cur.inset().completionSupported(cur);
 228 }
 229
 230
 231 bool GuiCompleter::inlinePossible(Cursor const & cur) const
 232 {
 233         return cur.inset().inlineCompletionSupported(cur);
 234 }
 235
 236
 237 bool GuiCompleter::popupVisible() const
 238 {
 239         return popup()->isVisible();
 240 }
 241
 242
 243 bool GuiCompleter::inlineVisible() const
 244 {
 245         // In fact using BufferView::inlineCompletionPos.empty() should be
 246         // here. But unfortunately this information is not good enough
 247         // because destructive operations like backspace might invalidate
 248         // inlineCompletionPos. But then the completion should stay visible
 249         // (i.e. reshown on the next update). Hence be keep this information
 250         // in the inlineVisible_ variable.
 251         return inlineVisible_;
 252 }
 253
 254
 255 void GuiCompleter::updateVisibility(Cursor & cur, bool start, bool keep, bool cursorInView)
 256 {
 257         // parameters which affect the completion
 258         bool moved = cur != old_cursor_;
 259         if (moved)
 260                 old_cursor_ = cur;
 261
 262         bool possiblePopupState = popupPossible(cur) && cursorInView;
 263         bool possibleInlineState = inlinePossible(cur) && cursorInView;
 264
 265         // we moved or popup state is not ok for popup?
 266         if ((moved && !keep) || !possiblePopupState)
 267                 hidePopup(cur);
 268
 269         // we moved or inline state is not ok for inline completion?
 270         if ((moved && !keep) || !possibleInlineState)
 271                 hideInline(cur);
 272
 273         // we inserted something and are in a possible popup state?
 274         if (!popupVisible() && possiblePopupState && start
 275                 && cur.inset().automaticPopupCompletion())
 276                 popup_timer_.start(int(lyxrc.completion_popup_delay * 1000));
 277
 278         // we inserted something and are in a possible inline completion state?
 279         if (!inlineVisible() && possibleInlineState && start
 280                 && cur.inset().automaticInlineCompletion())
 281                 inline_timer_.start(int(lyxrc.completion_inline_delay * 1000));
 282
 283         // update prefix if popup is visible or if it will be visible soon
 284         if (popupVisible() || inlineVisible()
 285             || popup_timer_.isActive() || inline_timer_.isActive())
 286                 updatePrefix(cur);
 287 }
 288
 289
 290 void GuiCompleter::updateVisibility(bool start, bool keep)
 291 {
 292         Cursor cur = gui_->bufferView().cursor();
 293         cur.updateFlags(Update::None);
 294
 295         updateVisibility(cur, start, keep);
 296
 297         if (cur.disp_.update())
 298                 gui_->bufferView().processUpdateFlags(cur.disp_.update());
 299 }
 300
 301
 302 void GuiCompleter::updatePrefix(Cursor & cur)
 303 {
 304         // get new prefix. Do nothing if unchanged
 305         QString newPrefix = toqstr(cur.inset().completionPrefix(cur));
 306         if (newPrefix == completionPrefix())
 307                 return;
 308
 309         // value which should be kept selected
 310         QString old = currentCompletion();
 311         if (old.length() == 0)
 312                 old = last_selection_;
 313
 314         // update completer to new prefix
 315         setCompletionPrefix(newPrefix);
 316
 317         // update popup because its size might have changed
 318         if (popupVisible())
 319                 updatePopup(cur);
 320
 321         // restore old selection
 322         setCurrentCompletion(old);
 323
 324         // if popup is not empty, the new selection will
 325         // be our last valid one
 326         QString const & s = currentCompletion();
 327         if (s.length() > 0)
 328                 last_selection_ = s;
 329         else
 330                 last_selection_ = old;
 331
 332         // update inline completion because the default
 333         // completion string might have changed
 334         if (inlineVisible())
 335                 updateInline(cur, s);
 336 }
 337
 338
 339 void GuiCompleter::updateInline(Cursor & cur, QString const & completion)
 340 {
 341         if (!cur.inset().inlineCompletionSupported(cur))
 342                 return;
 343
 344         // compute postfix
 345         docstring prefix = cur.inset().completionPrefix(cur);
 346         docstring postfix = from_utf8(fromqstr(completion.mid(prefix.length())));
 347
 348         // shorten it if necessary
 349         if (lyxrc.completion_inline_dots != -1
 350             && postfix.size() > unsigned(lyxrc.completion_inline_dots))
 351                 postfix = postfix.substr(0, lyxrc.completion_inline_dots - 1) + "...";
 352
 353         // set inline completion at cursor position
 354         size_t uniqueTo = max(longestUniqueCompletion().size(), prefix.size());
 355         gui_->bufferView().setInlineCompletion(cur, cur, postfix, uniqueTo - prefix.size());
 356         inlineVisible_ = true;
 357 }
 358
 359
 360 void GuiCompleter::updatePopup(Cursor & cur)
 361 {
 362         if (!cur.inset().completionSupported(cur))
 363                 return;
 364
 365         if (completionCount() == 0)
 366                 return;
 367
 368         // get dimensions of completion prefix
 369         Dimension dim;
 370         int x;
 371         int y;
 372         cur.inset().completionPosAndDim(cur, x, y, dim);
 373
 374         // and calculate the rect of the popup
 375         QRect rect;
 376         if (popup()->layoutDirection() == Qt::RightToLeft)
 377                 rect = QRect(x + dim.width() - 200, y - dim.ascent() - 3, 200, dim.height() + 6);
 378         else
 379                 rect = QRect(x, y - dim.ascent() - 3, 200, dim.height() + 6);
 380
 381         // show/update popup
 382         QTreeView * p = static_cast<QTreeView *>(popup());
 383         p->setColumnWidth(0, popup()->width() - 22 - p->verticalScrollBar()->width());
 384
 385         complete(rect);
 386 }
 387
 388
 389 void GuiCompleter::updateModel(Cursor & cur, bool popupUpdate, bool inlineUpdate)
 390 {
 391         // value which should be kept selected
 392         QString old = currentCompletion();
 393         if (old.length() == 0)
 394                 old = last_selection_;
 395
 396         // set whether rtl
 397         bool rtl = false;
 398         if (cur.inTexted()) {
 399                 Paragraph const & par = cur.paragraph();
 400                 Font const font =
 401                 par.getFontSettings(cur.bv().buffer().params(), cur.pos());
 402                 rtl = font.isVisibleRightToLeft();
 403         }
 404         popup()->setLayoutDirection(rtl ? Qt::RightToLeft : Qt::LeftToRight);
 405
 406         // turn the direction of the strings in the popup.
 407         // Qt does not do that itself.
 408         popup()->setItemDelegateForColumn(0, rtl ? rtlItemDelegate_ : 0);
 409
 410         // set new model
 411         Inset::CompletionList const * list = cur.inset().createCompletionList(cur);
 412         setModel(new GuiCompletionModel(this, list));
 413         if (list->sorted())
 414                 setModelSorting(QCompleter::CaseSensitivelySortedModel);
 415         else
 416                 setModelSorting(QCompleter::UnsortedModel);
 417
 418         // set prefix
 419         QString newPrefix = toqstr(cur.inset().completionPrefix(cur));
 420         if (newPrefix != completionPrefix())
 421                 setCompletionPrefix(newPrefix);
 422
 423         // show popup
 424         if (popupUpdate)
 425                 updatePopup(cur);
 426
 427         // restore old selection
 428         setCurrentCompletion(old);
 429
 430         // if popup is not empty, the new selection will
 431         // be our last valid one
 432         QString const & s = currentCompletion();
 433         if (s.length() > 0)
 434                 last_selection_ = s;
 435         else
 436                 last_selection_ = old;
 437
 438         // show inline completion
 439         if (inlineUpdate)
 440                 updateInline(cur, currentCompletion());
 441 }
 442
 443
 444 void GuiCompleter::showPopup(Cursor & cur)
 445 {
 446         if (!popupPossible(cur))
 447                 return;
 448
 449         updateModel(cur, true, inlineVisible());
 450 }
 451
 452
 453 void GuiCompleter::hidePopup(Cursor & cur)
 454 {
 455         popup()->hide();
 456         if (popup_timer_.isActive())
 457                 popup_timer_.stop();
 458 }
 459
 460
 461 void GuiCompleter::showInline(Cursor & cur)
 462 {
 463         if (!inlinePossible(cur))
 464                 return;
 465
 466         updateModel(cur, popupVisible(), true);
 467 }
 468
 469
 470 void GuiCompleter::hideInline(Cursor & cur)
 471 {
 472         gui_->bufferView().setInlineCompletion(cur, DocIterator(), docstring());
 473         inlineVisible_ = false;
 474 }
 475
 476
 477 void GuiCompleter::showPopup()
 478 {
 479         Cursor cur = gui_->bufferView().cursor();
 480         cur.updateFlags(Update::None);
 481
 482         showPopup(cur);
 483
 484         // redraw if needed
 485         if (cur.disp_.update())
 486                 gui_->bufferView().processUpdateFlags(cur.disp_.update());
 487 }
 488
 489
 490 void GuiCompleter::showInline()
 491 {
 492         Cursor cur = gui_->bufferView().cursor();
 493         cur.updateFlags(Update::None);
 494
 495         showInline(cur);
 496
 497         // redraw if needed
 498         if (cur.disp_.update())
 499                 gui_->bufferView().processUpdateFlags(cur.disp_.update());
 500 }
 501
 502
 503 void GuiCompleter::hidePopup()
 504 {
 505         Cursor cur = gui_->bufferView().cursor();
 506         cur.updateFlags(Update::None);
 507
 508         hidePopup(cur);
 509
 510         // redraw if needed
 511         if (cur.disp_.update())
 512                 gui_->bufferView().processUpdateFlags(cur.disp_.update());
 513 }
 514
 515
 516 void GuiCompleter::hideInline()
 517 {
 518         Cursor cur = gui_->bufferView().cursor();
 519         cur.updateFlags(Update::None);
 520
 521         hideInline(cur);
 522
 523         // redraw if needed
 524         if (cur.disp_.update())
 525                 gui_->bufferView().processUpdateFlags(cur.disp_.update());
 526 }
 527
 528
 529 void GuiCompleter::activate()
 530 {
 531         if (!popupVisible() && !inlineVisible())
 532                 return;
 533
 534         popupActivated(currentCompletion());
 535 }
 536
 537
 538 void GuiCompleter::tab()
 539 {
 540         BufferView * bv = &gui_->bufferView();
 541         Cursor cur = bv->cursor();
 542         cur.updateFlags(Update::None);
 543
 544         // check that inline completion is active
 545         if (!inlineVisible()) {
 546                 // try to activate the inline completion
 547                 if (cur.inset().inlineCompletionSupported(cur)) {
 548                         showInline();
 549
 550                         // show popup without delay because the completion was not unique
 551                         if (lyxrc.completion_popup_after_complete
 552                             && !popupVisible()
 553                             && popup()->model()->rowCount() > 1)
 554                                 popup_timer_.start(0);
 555
 556                         return;
 557                 }
 558                 // or try popup
 559                 if (!popupVisible() && cur.inset().completionSupported(cur)) {
 560                         showPopup();
 561                         return;
 562                 }
 563
 564                 return;
 565         }
 566
 567         // If completion is active, at least complete by one character
 568         docstring prefix = cur.inset().completionPrefix(cur);
 569         docstring completion = from_utf8(fromqstr(currentCompletion()));
 570         if (completion.size() <= prefix.size()) {
 571                 // finalize completion
 572                 cur.inset().insertCompletion(cur, docstring(), true);
 573
 574                 // hide popup and inline completion
 575                 hidePopup(cur);
 576                 hideInline(cur);
 577                 updateVisibility(false, false);
 578                 return;
 579         }
 580         docstring nextchar = completion.substr(prefix.size(), 1);
 581         if (!cur.inset().insertCompletion(cur, nextchar, false))
 582                 return;
 583         updatePrefix(cur);
 584
 585         // try to complete as far as it is unique
 586         docstring longestCompletion = longestUniqueCompletion();
 587         prefix = cur.inset().completionPrefix(cur);
 588         docstring postfix = longestCompletion.substr(min(longestCompletion.size(), prefix.size()));
 589         cur.inset().insertCompletion(cur, postfix, false);
 590         old_cursor_ = bv->cursor();
 591         updatePrefix(cur);
 592
 593         // show popup without delay because the completion was not unique
 594         if (lyxrc.completion_popup_after_complete
 595             && !popupVisible()
 596             && popup()->model()->rowCount() > 1)
 597                 popup_timer_.start(0);
 598
 599         // redraw if needed
 600         if (cur.disp_.update())
 601                 gui_->bufferView().processUpdateFlags(cur.disp_.update());
 602 }
 603
 604
 605 QString GuiCompleter::currentCompletion() const
 606 {
 607         if (!popup()->selectionModel()->hasSelection())
 608                 return QString();
 609
 610         // Not sure if this is bug in Qt: currentIndex() always
 611         // return the first element in the list.
 612         QModelIndex idx = popup()->currentIndex();
 613         return popup()->model()->data(idx, Qt::EditRole).toString();
 614 }
 615
 616
 617 void GuiCompleter::setCurrentCompletion(QString const & s)
 618 {
 619         QAbstractItemModel const & model = *popup()->model();
 620         size_t n = model.rowCount();
 621         if (n == 0)
 622                 return;
 623
 624         // select the first if s is empty
 625         if (s.length() == 0) {
 626                 updateLock_++;
 627                 popup()->setCurrentIndex(model.index(0, 0));
 628                 updateLock_--;
 629                 return;
 630         }
 631
 632         // find old selection in model
 633         size_t i;
 634         if (modelSorting() == QCompleter::UnsortedModel) {
 635                 // In unsorted models, iterate through list until the s is found
 636                 for (i = 0; i < n; ++i) {
 637                         QString const & is
 638                         = model.data(model.index(i, 0), Qt::EditRole).toString();
 639                         if (is == s)
 640                                 break;
 641                 }
 642         } else {
 643                 // In sorted models, do binary search for s.
 644                 int l = 0;
 645                 int r = n - 1;
 646                 while (r >= l && l < int(n)) {
 647                         size_t mid = (r + l) / 2;
 648                         QString const & mids
 649                         = model.data(model.index(mid, 0),
 650                                      Qt::EditRole).toString();
 651
 652                         // left or right?
 653                         // FIXME: is this really the same order that the docstring
 654                         // from the CompletionList has?
 655                         int c = s.compare(mids, Qt::CaseSensitive);
 656                         if (c == 0) {
 657                                 l = mid;
 658                                 break;
 659                         } else if (l == r) {
 660                                 l = n;
 661                                 break;
 662                         } else if (c > 0)
 663                                 // middle is not far enough
 664                                 l = mid + 1;
 665                         else
 666                                 // middle is too far
 667                                 r = mid - 1;
 668                 }
 669
 670                 // loop was left without finding anything
 671                 if (r < l)
 672                         i = n;
 673                 else
 674                         i = l;
 675                 BOOST_ASSERT(0 <= i && i <= n);
 676         }
 677
 678         // select the first if none was found
 679         if (i == n)
 680                 i = 0;
 681
 682         updateLock_++;
 683         popup()->setCurrentIndex(model.index(i, 0));
 684         updateLock_--;
 685 }
 686
 687
 688 size_t commonPrefix(QString const & s1, QString const & s2)
 689 {
 690         // find common prefix
 691         size_t j;
 692         size_t n1 = s1.length();
 693         size_t n2 = s2.length();
 694         for (j = 0; j < n1 && j < n2; ++j) {
 695                 if (s1.at(j) != s2.at(j))
 696                         break;
 697         }
 698         return j;
 699 }
 700
 701
 702 docstring GuiCompleter::longestUniqueCompletion() const
 703 {
 704         QAbstractItemModel const & model = *popup()->model();
 705         QString s = currentCompletion();
 706         size_t n = model.rowCount();
 707
 708         if (modelSorting() == QCompleter::UnsortedModel) {
 709                 // For unsorted model we cannot do more than iteration.
 710                 // Iterate through the completions and cut off where s differs
 711                 for (size_t i = 0; i < n && s.length() > 0; ++i) {
 712                         QString const & is
 713                         = model.data(model.index(i, 0), Qt::EditRole).toString();
 714
 715                         s = s.left(commonPrefix(is, s));
 716                 }
 717         } else {
 718                 // For sorted models we can do binary search multiple times,
 719                 // each time to find the first string which has s not as prefix.
 720                 size_t i = 0;
 721                 while (i < n && s.length() > 0) {
 722                         // find first string that does not have s as prefix
 723                         // via binary search in [i,n-1]
 724                         size_t r = n - 1;
 725                         do {
 726                                 // get common prefix with the middle string
 727                                 size_t mid = (r + i) / 2;
 728                                 QString const & mids
 729                                 = model.data(model.index(mid, 0),
 730                                         Qt::EditRole).toString();
 731                                 size_t oldLen = s.length();
 732                                 size_t len = commonPrefix(mids, s);
 733                                 s = s.left(len);
 734
 735                                 // left or right?
 736                                 if (oldLen == len) {
 737                                         // middle is not far enough
 738                                         i = mid + 1;
 739                                 } else {
 740                                         // middle is maybe too far
 741                                         r = mid;
 742                                 }
 743                         } while (r - i > 0 && i < n);
 744                 }
 745         }
 746
 747         return from_utf8(fromqstr(s));
 748 }
 749
 750
 751 void GuiCompleter::popupActivated(const QString & completion)
 752 {
 753         Cursor cur = gui_->bufferView().cursor();
 754         cur.updateFlags(Update::None);
 755
 756         docstring prefix = cur.inset().completionPrefix(cur);
 757         docstring postfix = from_utf8(fromqstr(completion.mid(prefix.length())));
 758         cur.inset().insertCompletion(cur, postfix, true);
 759         hidePopup(cur);
 760         hideInline(cur);
 761
 762         if (cur.disp_.update())
 763                 gui_->bufferView().processUpdateFlags(cur.disp_.update());
 764 }
 765
 766
 767 void GuiCompleter::popupHighlighted(const QString & completion)
 768 {
 769         if (updateLock_ > 0)
 770                 return;
 771
 772         Cursor cur = gui_->bufferView().cursor();
 773         cur.updateFlags(Update::None);
 774
 775         if (inlineVisible())
 776                 updateInline(cur, completion);
 777
 778         if (cur.disp_.update())
 779                 gui_->bufferView().processUpdateFlags(cur.disp_.update());
 780 }
 781
 782 } // namespace frontend
 783 } // namespace lyx
 784
 785 #include "GuiCompleter_moc.cpp"