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