src/BufferView.cpp

   1 /**
   2  * \file BufferView.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Alfredo Braunstein
   7  * \author Lars Gullik Bjønnes
   8  * \author John Levon
   9  * \author André Pönitz
  10  * \author Jürgen Vigna
  11  *
  12  * Full author contact details are available in file CREDITS.
  13  */
  14
  15 #include <config.h>
  16
  17 #include "BufferView.h"
  18
  19 #include "BranchList.h"
  20 #include "Buffer.h"
  21 #include "buffer_funcs.h"
  22 #include "BufferList.h"
  23 #include "BufferParams.h"
  24 #include "CoordCache.h"
  25 #include "Cursor.h"
  26 #include "CutAndPaste.h"
  27 #include "DispatchResult.h"
  28 #include "ErrorList.h"
  29 #include "factory.h"
  30 #include "FloatList.h"
  31 #include "FuncRequest.h"
  32 #include "FuncStatus.h"
  33 #include "Intl.h"
  34 #include "InsetIterator.h"
  35 #include "Language.h"
  36 #include "LaTeXFeatures.h"
  37 #include "LayoutFile.h"
  38 #include "Length.h"
  39 #include "Lexer.h"
  40 #include "LyX.h"
  41 #include "LyXAction.h"
  42 #include "lyxfind.h"
  43 #include "Layout.h"
  44 #include "LyXRC.h"
  45 #include "MetricsInfo.h"
  46 #include "Paragraph.h"
  47 #include "ParagraphParameters.h"
  48 #include "ParIterator.h"
  49 #include "RowPainter.h"
  50 #include "Session.h"
  51 #include "Text.h"
  52 #include "TextClass.h"
  53 #include "TextMetrics.h"
  54 #include "TexRow.h"
  55 #include "TocBackend.h"
  56 #include "WordLangTuple.h"
  57
  58 #include "insets/InsetBibtex.h"
  59 #include "insets/InsetCitation.h"
  60 #include "insets/InsetCommand.h" // ChangeRefs
  61 #include "insets/InsetExternal.h"
  62 #include "insets/InsetGraphics.h"
  63 #include "insets/InsetNote.h"
  64 #include "insets/InsetRef.h"
  65 #include "insets/InsetText.h"
  66
  67 #include "mathed/MathData.h"
  68
  69 #include "frontends/alert.h"
  70 #include "frontends/Application.h"
  71 #include "frontends/Delegates.h"
  72 #include "frontends/FontMetrics.h"
  73 #include "frontends/NullPainter.h"
  74 #include "frontends/Painter.h"
  75 #include "frontends/Selection.h"
  76
  77 #include "support/convert.h"
  78 #include "support/debug.h"
  79 #include "support/ExceptionMessage.h"
  80 #include "support/filetools.h"
  81 #include "support/gettext.h"
  82 #include "support/lassert.h"
  83 #include "support/lstrings.h"
  84 #include "support/Package.h"
  85 #include "support/types.h"
  86
  87 #include <cerrno>
  88 #include <fstream>
  89 #include <functional>
  90 #include <iterator>
  91 #include <sstream>
  92 #include <vector>
  93
  94 using namespace std;
  95 using namespace lyx::support;
  96
  97 namespace lyx {
  98
  99 namespace Alert = frontend::Alert;
 100
 101 namespace {
 102
 103 /// Return an inset of this class if it exists at the current cursor position
 104 template <class T>
 105 T * getInsetByCode(Cursor const & cur, InsetCode code)
 106 {
 107         DocIterator it = cur;
 108         Inset * inset = it.nextInset();
 109         if (inset && inset->lyxCode() == code)
 110                 return static_cast<T*>(inset);
 111         return 0;
 112 }
 113
 114
 115 /// Note that comparing contents can only be used for InsetCommand
 116 bool findNextInset(DocIterator & dit, vector<InsetCode> const & codes,
 117         docstring const & contents)
 118 {
 119         DocIterator tmpdit = dit;
 120
 121         while (tmpdit) {
 122                 Inset const * inset = tmpdit.nextInset();
 123                 if (inset) {
 124                         bool const valid_code = std::find(codes.begin(), codes.end(),
 125                                 inset->lyxCode()) != codes.end();
 126                         InsetCommand const * ic = inset->asInsetCommand();
 127                         bool const same_or_no_contents =  contents.empty()
 128                                 || (ic && (ic->getFirstNonOptParam() == contents));
 129
 130                         if (valid_code && same_or_no_contents) {
 131                                 dit = tmpdit;
 132                                 return true;
 133                         }
 134                 }
 135                 tmpdit.forwardInset();
 136         }
 137
 138         return false;
 139 }
 140
 141
 142 /// Looks for next inset with one of the given codes.
 143 /// Note that same_content can only be used for InsetCommand
 144 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
 145         bool same_content)
 146 {
 147         docstring contents;
 148         DocIterator tmpdit = dit;
 149         tmpdit.forwardInset();
 150         if (!tmpdit)
 151                 return false;
 152
 153         Inset const * inset = tmpdit.nextInset();
 154         if (same_content && inset) {
 155                 InsetCommand const * ic = inset->asInsetCommand();
 156                 if (ic) {
 157                         bool const valid_code = std::find(codes.begin(), codes.end(),
 158                                 ic->lyxCode()) != codes.end();
 159                         if (valid_code)
 160                                 contents = ic->getFirstNonOptParam();
 161                 }
 162         }
 163
 164         if (!findNextInset(tmpdit, codes, contents)) {
 165                 if (dit.depth() != 1 || dit.pit() != 0 || dit.pos() != 0) {
 166                         Inset * inset = &tmpdit.bottom().inset();
 167                         tmpdit = doc_iterator_begin(&inset->buffer(), inset);
 168                         if (!findNextInset(tmpdit, codes, contents))
 169                                 return false;
 170                 } else {
 171                         return false;
 172                 }
 173         }
 174
 175         dit = tmpdit;
 176         return true;
 177 }
 178
 179
 180 /// Looks for next inset with the given code
 181 void findInset(DocIterator & dit, InsetCode code, bool same_content)
 182 {
 183         findInset(dit, vector<InsetCode>(1, code), same_content);
 184 }
 185
 186
 187 /// Moves cursor to the next inset with one of the given codes.
 188 void gotoInset(BufferView * bv, vector<InsetCode> const & codes,
 189                bool same_content)
 190 {
 191         Cursor tmpcur = bv->cursor();
 192         if (!findInset(tmpcur, codes, same_content)) {
 193                 bv->cursor().message(_("No more insets"));
 194                 return;
 195         }
 196
 197         tmpcur.clearSelection();
 198         bv->setCursor(tmpcur);
 199         bv->showCursor();
 200 }
 201
 202
 203 /// Moves cursor to the next inset with given code.
 204 void gotoInset(BufferView * bv, InsetCode code, bool same_content)
 205 {
 206         gotoInset(bv, vector<InsetCode>(1, code), same_content);
 207 }
 208
 209
 210 /// A map from a Text to the associated text metrics
 211 typedef map<Text const *, TextMetrics> TextMetricsCache;
 212
 213 enum ScreenUpdateStrategy {
 214         NoScreenUpdate,
 215         SingleParUpdate,
 216         FullScreenUpdate,
 217         DecorationUpdate
 218 };
 219
 220 } // namespace
 221
 222
 223 /////////////////////////////////////////////////////////////////////
 224 //
 225 // BufferView
 226 //
 227 /////////////////////////////////////////////////////////////////////
 228
 229 struct BufferView::Private
 230 {
 231         Private(BufferView & bv) : update_strategy_(FullScreenUpdate),
 232                 update_flags_(Update::Force),
 233                 wh_(0), cursor_(bv),
 234                 anchor_pit_(0), anchor_ypos_(0),
 235                 inlineCompletionUniqueChars_(0),
 236                 last_inset_(0), clickable_inset_(false),
 237                 mouse_position_cache_(),
 238                 bookmark_edit_position_(-1), gui_(0),
 239                 horiz_scroll_offset_(0), repaint_caret_row_(false)
 240         {
 241                 xsel_cache_.set = false;
 242         }
 243
 244         ///
 245         ScrollbarParameters scrollbarParameters_;
 246         ///
 247         ScreenUpdateStrategy update_strategy_;
 248         ///
 249         Update::flags update_flags_;
 250         ///
 251         CoordCache coord_cache_;
 252
 253         /// Estimated average par height for scrollbar.
 254         int wh_;
 255         /// this is used to handle XSelection events in the right manner.
 256         struct {
 257                 CursorSlice cursor;
 258                 CursorSlice anchor;
 259                 bool set;
 260         } xsel_cache_;
 261         ///
 262         Cursor cursor_;
 263         ///
 264         pit_type anchor_pit_;
 265         ///
 266         int anchor_ypos_;
 267         ///
 268         vector<int> par_height_;
 269
 270         ///
 271         DocIterator inlineCompletionPos_;
 272         ///
 273         docstring inlineCompletion_;
 274         ///
 275         size_t inlineCompletionUniqueChars_;
 276
 277         /// keyboard mapping object.
 278         Intl intl_;
 279
 280         /// last visited inset.
 281         /** kept to send setMouseHover(false).
 282           * Not owned, so don't delete.
 283           */
 284         Inset const * last_inset_;
 285         /// are we hovering something that we can click
 286         bool clickable_inset_;
 287
 288         /// position of the mouse at the time of the last mouse move
 289         /// This is used to update the hovering status of inset in
 290         /// cases where the buffer is scrolled, but the mouse didn't move.
 291         Point mouse_position_cache_;
 292
 293         // cache for id of the paragraph which was edited the last time
 294         int bookmark_edit_position_;
 295
 296         mutable TextMetricsCache text_metrics_;
 297
 298         /// Whom to notify.
 299         /** Not owned, so don't delete.
 300           */
 301         frontend::GuiBufferViewDelegate * gui_;
 302
 303         /// Cache for Find Next
 304         FuncRequest search_request_cache_;
 305
 306         ///
 307         map<string, Inset *> edited_insets_;
 308
 309         /// When the row where the cursor lies is scrolled, this
 310         /// contains the scroll offset
 311         int horiz_scroll_offset_;
 312         /// a slice pointing to the start of the row where the cursor
 313         /// is (at last draw time)
 314         CursorSlice current_row_slice_;
 315         /// a slice pointing to the start of the row where cursor was
 316         /// at previous draw event
 317         CursorSlice last_row_slice_;
 318
 319         /// a slice pointing to where the cursor has been drawn after the current
 320         /// draw() call.
 321         CursorSlice caret_slice_;
 322         /// indicates whether the caret slice needs to be repainted in this draw() run.
 323         bool repaint_caret_row_;
 324 };
 325
 326
 327 BufferView::BufferView(Buffer & buf)
 328         : width_(0), height_(0), full_screen_(false), buffer_(buf),
 329       d(new Private(*this))
 330 {
 331         d->xsel_cache_.set = false;
 332         d->intl_.initKeyMapper(lyxrc.use_kbmap);
 333
 334         d->cursor_.setBuffer(&buf);
 335         d->cursor_.push(buffer_.inset());
 336         d->cursor_.resetAnchor();
 337         d->cursor_.setCurrentFont();
 338
 339         buffer_.updatePreviews();
 340 }
 341
 342
 343 BufferView::~BufferView()
 344 {
 345         // current buffer is going to be switched-off, save cursor pos
 346         // Ideally, the whole cursor stack should be saved, but session
 347         // currently can only handle bottom (whole document) level pit and pos.
 348         // That is to say, if a cursor is in a nested inset, it will be
 349         // restore to the left of the top level inset.
 350         LastFilePosSection::FilePos fp;
 351         fp.pit = d->cursor_.bottom().pit();
 352         fp.pos = d->cursor_.bottom().pos();
 353         theSession().lastFilePos().save(buffer_.fileName(), fp);
 354
 355         if (d->last_inset_)
 356                 d->last_inset_->setMouseHover(this, false);
 357
 358         delete d;
 359 }
 360
 361
 362 int BufferView::rightMargin() const
 363 {
 364         // The value used to be hardcoded to 10, which is 0.1in at 100dpi
 365         int const default_margin = Length(0.1, Length::IN).inPixels(0);
 366         // The additional test for the case the outliner is opened.
 367         if (!full_screen_ || !lyxrc.full_screen_limit
 368             || width_ < lyxrc.full_screen_width + 2 * default_margin)
 369                 return default_margin;
 370
 371         return (width_ - lyxrc.full_screen_width) / 2;
 372 }
 373
 374
 375 int BufferView::leftMargin() const
 376 {
 377         return rightMargin();
 378 }
 379
 380
 381 int BufferView::inPixels(Length const & len) const
 382 {
 383         Font const font = buffer().params().getFont();
 384         return len.inPixels(workWidth(), theFontMetrics(font).em());
 385 }
 386
 387
 388 bool BufferView::isTopScreen() const
 389 {
 390         return 0 == d->scrollbarParameters_.min;
 391 }
 392
 393
 394 bool BufferView::isBottomScreen() const
 395 {
 396         return 0 == d->scrollbarParameters_.max;
 397 }
 398
 399
 400 Intl & BufferView::getIntl()
 401 {
 402         return d->intl_;
 403 }
 404
 405
 406 Intl const & BufferView::getIntl() const
 407 {
 408         return d->intl_;
 409 }
 410
 411
 412 CoordCache & BufferView::coordCache()
 413 {
 414         return d->coord_cache_;
 415 }
 416
 417
 418 CoordCache const & BufferView::coordCache() const
 419 {
 420         return d->coord_cache_;
 421 }
 422
 423
 424 Buffer & BufferView::buffer()
 425 {
 426         return buffer_;
 427 }
 428
 429
 430 Buffer const & BufferView::buffer() const
 431 {
 432         return buffer_;
 433 }
 434
 435
 436 bool BufferView::needsFitCursor() const
 437 {
 438         if (cursorStatus(d->cursor_) == CUR_INSIDE) {
 439                 frontend::FontMetrics const & fm =
 440                         theFontMetrics(d->cursor_.getFont().fontInfo());
 441                 int const asc = fm.maxAscent();
 442                 int const des = fm.maxDescent();
 443                 Point const p = getPos(d->cursor_);
 444                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
 445                         return false;
 446         }
 447         return true;
 448 }
 449
 450
 451 namespace {
 452
 453 // this is for debugging only.
 454 string flagsAsString(Update::flags flags)
 455 {
 456         if (flags == Update::None)
 457                 return "None ";
 458         return string((flags & Update::FitCursor) ? "FitCursor " : "")
 459                 + ((flags & Update::Force) ? "Force " : "")
 460                 + ((flags & Update::ForceDraw) ? "ForceDraw " : "")
 461                 + ((flags & Update::SinglePar) ? "SinglePar " : "");
 462 }
 463
 464 }
 465
 466 void BufferView::processUpdateFlags(Update::flags flags)
 467 {
 468         LYXERR(Debug::PAINTING, "BufferView::processUpdateFlags( "
 469                    << flagsAsString(flags) << ")  buffer: " << &buffer_);
 470
 471         // Case when no explicit update is requested.
 472         if (flags == Update::None)
 473                 return;
 474
 475         // SinglePar is ignored for now (this should probably change). We
 476         // set it ourselves below, at the price of always rebreaking the
 477         // paragraph at cursor. This can be expensive for large tables.
 478         flags = flags & ~Update::SinglePar;
 479
 480         // First check whether the metrics and inset positions should be updated
 481         if (flags & Update::Force) {
 482                 // This will update the CoordCache items and replace Force
 483                 // with ForceDraw in flags.
 484                 updateMetrics(flags);
 485         }
 486
 487         // Then make sure that the screen contains the cursor if needed
 488         if (flags & Update::FitCursor) {
 489                 if (needsFitCursor()) {
 490                         scrollToCursor(d->cursor_, false);
 491                         // Metrics have to be recomputed (maybe again)
 492                         updateMetrics(flags);
 493                 }
 494                 flags = flags & ~Update::FitCursor;
 495         }
 496
 497         // Finally detect whether we can only repaint a single paragraph
 498         if (!(flags & Update::ForceDraw)) {
 499                 if (singleParUpdate())
 500                         flags = flags | Update::SinglePar;
 501                 else
 502                         updateMetrics(flags);
 503         }
 504
 505         // Add flags to the the update flags. These will be reset to None
 506         // after the redraw is actually done
 507         d->update_flags_ = d->update_flags_ | flags;
 508         LYXERR(Debug::PAINTING, "Cumulative flags: " << flagsAsString(flags));
 509
 510         // Now compute the update strategy
 511         // Possibly values in flag are None, Decoration, ForceDraw
 512         LATTEST((d->update_flags_ & ~(Update::None | Update::SinglePar
 513                                       | Update::Decoration | Update::ForceDraw)) == 0);
 514
 515         if (d->update_flags_ & Update::ForceDraw)
 516                 d->update_strategy_ = FullScreenUpdate;
 517         else if (d->update_flags_ & Update::Decoration)
 518                 d->update_strategy_ = DecorationUpdate;
 519         else if (d->update_flags_ & Update::SinglePar)
 520                 d->update_strategy_ = SingleParUpdate;
 521         else {
 522                 // no need to redraw anything.
 523                 d->update_strategy_ = NoScreenUpdate;
 524         }
 525
 526         updateHoveredInset();
 527
 528         // Trigger a redraw.
 529         buffer_.changed(false);
 530 }
 531
 532
 533 void BufferView::updateScrollbar()
 534 {
 535         if (height_ == 0 && width_ == 0)
 536                 return;
 537
 538         // We prefer fixed size line scrolling.
 539         d->scrollbarParameters_.single_step = defaultRowHeight();
 540         // We prefer full screen page scrolling.
 541         d->scrollbarParameters_.page_step = height_;
 542
 543         Text & t = buffer_.text();
 544         TextMetrics & tm = d->text_metrics_[&t];
 545
 546         LYXERR(Debug::GUI, " Updating scrollbar: height: "
 547                 << t.paragraphs().size()
 548                 << " curr par: " << d->cursor_.bottom().pit()
 549                 << " default height " << defaultRowHeight());
 550
 551         size_t const parsize = t.paragraphs().size();
 552         if (d->par_height_.size() != parsize) {
 553                 d->par_height_.clear();
 554                 // FIXME: We assume a default paragraph height of 2 rows. This
 555                 // should probably be pondered with the screen width.
 556                 d->par_height_.resize(parsize, defaultRowHeight() * 2);
 557         }
 558
 559         // Look at paragraph heights on-screen
 560         pair<pit_type, ParagraphMetrics const *> first = tm.first();
 561         pair<pit_type, ParagraphMetrics const *> last = tm.last();
 562         for (pit_type pit = first.first; pit <= last.first; ++pit) {
 563                 d->par_height_[pit] = tm.parMetrics(pit).height();
 564                 LYXERR(Debug::SCROLLING, "storing height for pit " << pit << " : "
 565                         << d->par_height_[pit]);
 566         }
 567
 568         int top_pos = first.second->position() - first.second->ascent();
 569         int bottom_pos = last.second->position() + last.second->descent();
 570         bool first_visible = first.first == 0 && top_pos >= 0;
 571         bool last_visible = last.first + 1 == int(parsize) && bottom_pos <= height_;
 572         if (first_visible && last_visible) {
 573                 d->scrollbarParameters_.min = 0;
 574                 d->scrollbarParameters_.max = 0;
 575                 return;
 576         }
 577
 578         d->scrollbarParameters_.min = top_pos;
 579         for (size_t i = 0; i != size_t(first.first); ++i)
 580                 d->scrollbarParameters_.min -= d->par_height_[i];
 581         d->scrollbarParameters_.max = bottom_pos;
 582         for (size_t i = last.first + 1; i != parsize; ++i)
 583                 d->scrollbarParameters_.max += d->par_height_[i];
 584
 585         // The reference is the top position so we remove one page.
 586         if (lyxrc.scroll_below_document)
 587                 d->scrollbarParameters_.max -= minVisiblePart();
 588         else
 589                 d->scrollbarParameters_.max -= d->scrollbarParameters_.page_step;
 590
 591         // 0 must be inside the range as it denotes the current position
 592         if (d->scrollbarParameters_.max < 0)
 593                 d->scrollbarParameters_.max = 0;
 594         if (d->scrollbarParameters_.min > 0)
 595                 d->scrollbarParameters_.min = 0;
 596 }
 597
 598
 599 ScrollbarParameters const & BufferView::scrollbarParameters() const
 600 {
 601         return d->scrollbarParameters_;
 602 }
 603
 604
 605 docstring BufferView::toolTip(int x, int y) const
 606 {
 607         // Get inset under mouse, if there is one.
 608         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 609         if (!covering_inset)
 610                 // No inset, no tooltip...
 611                 return docstring();
 612         return covering_inset->toolTip(*this, x, y);
 613 }
 614
 615
 616 string BufferView::contextMenu(int x, int y) const
 617 {
 618         //If there is a selection, return the containing inset menu
 619         if (d->cursor_.selection())
 620                 return d->cursor_.inset().contextMenu(*this, x, y);
 621
 622         // Get inset under mouse, if there is one.
 623         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 624         if (covering_inset)
 625                 return covering_inset->contextMenu(*this, x, y);
 626
 627         return buffer_.inset().contextMenu(*this, x, y);
 628 }
 629
 630
 631
 632 void BufferView::scrollDocView(int const value, bool update)
 633 {
 634         // The scrollbar values are relative to the top of the screen, therefore the
 635         // offset is equal to the target value.
 636
 637         // No scrolling at all? No need to redraw anything
 638         if (value == 0)
 639                 return;
 640
 641         // If the offset is less than 2 screen height, prefer to scroll instead.
 642         if (abs(value) <= 2 * height_) {
 643                 d->anchor_ypos_ -= value;
 644                 processUpdateFlags(Update::Force);
 645                 return;
 646         }
 647
 648         // cut off at the top
 649         if (value <= d->scrollbarParameters_.min) {
 650                 DocIterator dit = doc_iterator_begin(&buffer_);
 651                 showCursor(dit, false, update);
 652                 LYXERR(Debug::SCROLLING, "scroll to top");
 653                 return;
 654         }
 655
 656         // cut off at the bottom
 657         if (value >= d->scrollbarParameters_.max) {
 658                 DocIterator dit = doc_iterator_end(&buffer_);
 659                 dit.backwardPos();
 660                 showCursor(dit, false, update);
 661                 LYXERR(Debug::SCROLLING, "scroll to bottom");
 662                 return;
 663         }
 664
 665         // find paragraph at target position
 666         int par_pos = d->scrollbarParameters_.min;
 667         pit_type i = 0;
 668         for (; i != int(d->par_height_.size()); ++i) {
 669                 par_pos += d->par_height_[i];
 670                 if (par_pos >= value)
 671                         break;
 672         }
 673
 674         if (par_pos < value) {
 675                 // It seems we didn't find the correct pit so stay on the safe side and
 676                 // scroll to bottom.
 677                 LYXERR0("scrolling position not found!");
 678                 scrollDocView(d->scrollbarParameters_.max, update);
 679                 return;
 680         }
 681
 682         DocIterator dit = doc_iterator_begin(&buffer_);
 683         dit.pit() = i;
 684         LYXERR(Debug::SCROLLING, "value = " << value << " -> scroll to pit " << i);
 685         showCursor(dit, false, update);
 686 }
 687
 688
 689 // FIXME: this method is not working well.
 690 void BufferView::setCursorFromScrollbar()
 691 {
 692         TextMetrics & tm = d->text_metrics_[&buffer_.text()];
 693
 694         int const height = 2 * defaultRowHeight();
 695         int const first = height;
 696         int const last = height_ - height;
 697         int newy = 0;
 698         Cursor const & oldcur = d->cursor_;
 699
 700         switch (cursorStatus(oldcur)) {
 701         case CUR_ABOVE:
 702                 newy = first;
 703                 break;
 704         case CUR_BELOW:
 705                 newy = last;
 706                 break;
 707         case CUR_INSIDE:
 708                 int const y = getPos(oldcur).y_;
 709                 newy = min(last, max(y, first));
 710                 if (y == newy)
 711                         return;
 712         }
 713         // We reset the cursor because cursorStatus() does not
 714         // work when the cursor is within mathed.
 715         Cursor cur(*this);
 716         cur.reset();
 717         tm.setCursorFromCoordinates(cur, 0, newy);
 718
 719         // update the bufferview cursor and notify insets
 720         // FIXME: Care about the d->cursor_ flags to redraw if needed
 721         Cursor old = d->cursor_;
 722         mouseSetCursor(cur);
 723         // the DEPM call in mouseSetCursor() might have destroyed the
 724         // paragraph the cursor is in.
 725         bool badcursor = old.fixIfBroken();
 726         badcursor |= notifyCursorLeavesOrEnters(old, d->cursor_);
 727         if (badcursor)
 728                 d->cursor_.fixIfBroken();
 729 }
 730
 731
 732 Change const BufferView::getCurrentChange() const
 733 {
 734         if (!d->cursor_.selection())
 735                 return Change(Change::UNCHANGED);
 736
 737         DocIterator dit = d->cursor_.selectionBegin();
 738         // The selected content might have been changed (see #7685)
 739         dit = dit.getInnerText();
 740         return dit.paragraph().lookupChange(dit.pos());
 741 }
 742
 743
 744 // this could be used elsewhere as well?
 745 // FIXME: This does not work within mathed!
 746 CursorStatus BufferView::cursorStatus(DocIterator const & dit) const
 747 {
 748         Point const p = getPos(dit);
 749         if (p.y_ < 0)
 750                 return CUR_ABOVE;
 751         if (p.y_ > workHeight())
 752                 return CUR_BELOW;
 753         return CUR_INSIDE;
 754 }
 755
 756
 757 void BufferView::bookmarkEditPosition()
 758 {
 759         // Don't eat cpu time for each keystroke
 760         if (d->cursor_.paragraph().id() == d->bookmark_edit_position_)
 761                 return;
 762         saveBookmark(0);
 763         d->bookmark_edit_position_ = d->cursor_.paragraph().id();
 764 }
 765
 766
 767 void BufferView::saveBookmark(unsigned int idx)
 768 {
 769         // tentatively save bookmark, id and pos will be used to
 770         // acturately locate a bookmark in a 'live' lyx session.
 771         // pit and pos will be updated with bottom level pit/pos
 772         // when lyx exits.
 773         if (!buffer_.isInternal()) {
 774                 theSession().bookmarks().save(
 775                         buffer_.fileName(),
 776                         d->cursor_.bottom().pit(),
 777                         d->cursor_.bottom().pos(),
 778                         d->cursor_.paragraph().id(),
 779                         d->cursor_.pos(),
 780                         idx
 781                         );
 782                 if (idx)
 783                         // emit message signal.
 784                         message(_("Save bookmark"));
 785         }
 786 }
 787
 788
 789 bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 790         int top_id, pos_type top_pos)
 791 {
 792         bool success = false;
 793         DocIterator dit;
 794
 795         d->cursor_.clearSelection();
 796
 797         // if a valid par_id is given, try it first
 798         // This is the case for a 'live' bookmark when unique paragraph ID
 799         // is used to track bookmarks.
 800         if (top_id > 0) {
 801                 dit = buffer_.getParFromID(top_id);
 802                 if (!dit.atEnd()) {
 803                         dit.pos() = min(dit.paragraph().size(), top_pos);
 804                         // Some slices of the iterator may not be
 805                         // reachable (e.g. closed collapsible inset)
 806                         // so the dociterator may need to be
 807                         // shortened. Otherwise, setCursor may crash
 808                         // lyx when the cursor can not be set to these
 809                         // insets.
 810                         size_t const n = dit.depth();
 811                         for (size_t i = 0; i < n; ++i)
 812                                 if (!dit[i].inset().editable()) {
 813                                         dit.resize(i);
 814                                         break;
 815                                 }
 816                         success = true;
 817                 }
 818         }
 819
 820         // if top_id == 0, or searching through top_id failed
 821         // This is the case for a 'restored' bookmark when only bottom
 822         // (document level) pit was saved. Because of this, bookmark
 823         // restoration is inaccurate. If a bookmark was within an inset,
 824         // it will be restored to the left of the outmost inset that contains
 825         // the bookmark.
 826         if (bottom_pit < int(buffer_.paragraphs().size())) {
 827                 dit = doc_iterator_begin(&buffer_);
 828
 829                 dit.pit() = bottom_pit;
 830                 dit.pos() = min(bottom_pos, dit.paragraph().size());
 831                 success = true;
 832         }
 833
 834         if (success) {
 835                 // Note: only bottom (document) level pit is set.
 836                 setCursor(dit);
 837                 // set the current font.
 838                 d->cursor_.setCurrentFont();
 839                 // Do not forget to reset the anchor (see #9912)
 840                 d->cursor_.resetAnchor();
 841                 processUpdateFlags(Update::FitCursor);
 842         }
 843
 844         return success;
 845 }
 846
 847
 848 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 849 {
 850         if (d->cursor_.real_current_font.isRightToLeft()) {
 851                 if (d->intl_.keymap == Intl::PRIMARY)
 852                         d->intl_.keyMapSec();
 853         } else {
 854                 if (d->intl_.keymap == Intl::SECONDARY)
 855                         d->intl_.keyMapPrim();
 856         }
 857
 858         d->intl_.getTransManager().translateAndInsert(c, t, cur);
 859 }
 860
 861
 862 int BufferView::workWidth() const
 863 {
 864         return width_;
 865 }
 866
 867
 868 void BufferView::recenter()
 869 {
 870         showCursor(d->cursor_, true, true);
 871 }
 872
 873
 874 void BufferView::showCursor()
 875 {
 876         showCursor(d->cursor_, false, true);
 877 }
 878
 879
 880 void BufferView::showCursor(DocIterator const & dit,
 881         bool recenter, bool update)
 882 {
 883         if (scrollToCursor(dit, recenter) && update)
 884                 processUpdateFlags(Update::Force);
 885 }
 886
 887
 888 void BufferView::scrollToCursor()
 889 {
 890         if (scrollToCursor(d->cursor_, false))
 891                 processUpdateFlags(Update::Force);
 892 }
 893
 894
 895 bool BufferView::scrollToCursor(DocIterator const & dit, bool const recenter)
 896 {
 897         // We are not properly started yet, delay until resizing is
 898         // done.
 899         if (height_ == 0)
 900                 return false;
 901
 902         LYXERR(Debug::SCROLLING, "recentering!");
 903
 904         CursorSlice const & bot = dit.bottom();
 905         TextMetrics & tm = d->text_metrics_[bot.text()];
 906
 907         pos_type const max_pit = pos_type(bot.text()->paragraphs().size() - 1);
 908         int bot_pit = bot.pit();
 909         if (bot_pit > max_pit) {
 910                 // FIXME: Why does this happen?
 911                 LYXERR0("bottom pit is greater that max pit: "
 912                         << bot_pit << " > " << max_pit);
 913                 bot_pit = max_pit;
 914         }
 915
 916         if (bot_pit == tm.first().first - 1)
 917                 tm.newParMetricsUp();
 918         else if (bot_pit == tm.last().first + 1)
 919                 tm.newParMetricsDown();
 920
 921         if (tm.contains(bot_pit)) {
 922                 ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 923                 LBUFERR(!pm.rows().empty());
 924                 // FIXME: smooth scrolling doesn't work in mathed.
 925                 CursorSlice const & cs = dit.innerTextSlice();
 926                 int offset = coordOffset(dit).y_;
 927                 int ypos = pm.position() + offset;
 928                 Dimension const & row_dim =
 929                         pm.getRow(cs.pos(), dit.boundary()).dimension();
 930                 int scrolled = 0;
 931                 if (recenter)
 932                         scrolled = scroll(ypos - height_/2);
 933
 934                 // We try to visualize the whole row, if the row height is larger than
 935                 // the screen height, we scroll to a heuristic value of height_ / 4.
 936                 // FIXME: This heuristic value should be replaced by a recursive search
 937                 // for a row in the inset that can be visualized completely.
 938                 else if (row_dim.height() > height_) {
 939                         if (ypos < defaultRowHeight())
 940                                 scrolled = scroll(ypos - height_ / 4);
 941                         else if (ypos > height_ - defaultRowHeight())
 942                                 scrolled = scroll(ypos - 3 * height_ / 4);
 943                 }
 944
 945                 // If the top part of the row falls of the screen, we scroll
 946                 // up to align the top of the row with the top of the screen.
 947                 else if (ypos - row_dim.ascent() < 0 && ypos < height_) {
 948                         int ynew = row_dim.ascent();
 949                         scrolled = scrollUp(ynew - ypos);
 950                 }
 951
 952                 // If the bottom of the row falls of the screen, we scroll down.
 953                 else if (ypos + row_dim.descent() > height_ && ypos > 0) {
 954                         int ynew = height_ - row_dim.descent();
 955                         scrolled = scrollDown(ypos - ynew);
 956                 }
 957
 958                 // else, nothing to do, the cursor is already visible so we just return.
 959                 return scrolled != 0;
 960         }
 961
 962         // fix inline completion position
 963         if (d->inlineCompletionPos_.fixIfBroken())
 964                 d->inlineCompletionPos_ = DocIterator();
 965
 966         tm.redoParagraph(bot_pit);
 967         ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
 968         int offset = coordOffset(dit).y_;
 969
 970         d->anchor_pit_ = bot_pit;
 971         CursorSlice const & cs = dit.innerTextSlice();
 972         Dimension const & row_dim =
 973                 pm.getRow(cs.pos(), dit.boundary()).dimension();
 974
 975         if (recenter)
 976                 d->anchor_ypos_ = height_/2;
 977         else if (d->anchor_pit_ == 0)
 978                 d->anchor_ypos_ = offset + pm.ascent();
 979         else if (d->anchor_pit_ == max_pit)
 980                 d->anchor_ypos_ = height_ - offset - row_dim.descent();
 981         else if (offset > height_)
 982                 d->anchor_ypos_ = height_ - offset - defaultRowHeight();
 983         else
 984                 d->anchor_ypos_ = defaultRowHeight() * 2;
 985
 986         return true;
 987 }
 988
 989
 990 void BufferView::makeDocumentClass()
 991 {
 992         DocumentClassConstPtr olddc = buffer_.params().documentClassPtr();
 993         buffer_.params().makeDocumentClass();
 994         updateDocumentClass(olddc);
 995 }
 996
 997
 998 void BufferView::updateDocumentClass(DocumentClassConstPtr olddc)
 999 {
1000         message(_("Converting document to new document class..."));
1001
1002         StableDocIterator backcur(d->cursor_);
1003         ErrorList & el = buffer_.errorList("Class Switch");
1004         cap::switchBetweenClasses(
1005                         olddc, buffer_.params().documentClassPtr(),
1006                         static_cast<InsetText &>(buffer_.inset()), el);
1007
1008         setCursor(backcur.asDocIterator(&buffer_));
1009
1010         buffer_.errors("Class Switch");
1011 }
1012
1013
1014 /** Return the change status at cursor position, taking into account the
1015  * status at each level of the document iterator (a table in a deleted
1016  * footnote is deleted).
1017  * When \param outer is true, the top slice is not looked at.
1018  */
1019 static Change::Type lookupChangeType(DocIterator const & dit, bool outer = false)
1020 {
1021         size_t const depth = dit.depth() - (outer ? 1 : 0);
1022
1023         for (size_t i = 0 ; i < depth ; ++i) {
1024                 CursorSlice const & slice = dit[i];
1025                 if (!slice.inset().inMathed()
1026                     && slice.pos() < slice.paragraph().size()) {
1027                         Change::Type const ch = slice.paragraph().lookupChange(slice.pos()).type;
1028                         if (ch != Change::UNCHANGED)
1029                                 return ch;
1030                 }
1031         }
1032         return Change::UNCHANGED;
1033 }
1034
1035
1036 bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
1037 {
1038         FuncCode const act = cmd.action();
1039
1040         // Can we use a readonly buffer?
1041         if (buffer_.isReadonly()
1042             && !lyxaction.funcHasFlag(act, LyXAction::ReadOnly)
1043             && !lyxaction.funcHasFlag(act, LyXAction::NoBuffer)) {
1044                 if (buffer_.hasReadonlyFlag())
1045                         flag.message(from_utf8(N_("Document is read-only")));
1046                 else
1047                         flag.message(from_utf8(N_("Document has been modified externally")));
1048                 flag.setEnabled(false);
1049                 return true;
1050         }
1051
1052         // Are we in a DELETED change-tracking region?
1053         if (lookupChangeType(d->cursor_, true) == Change::DELETED
1054             && !lyxaction.funcHasFlag(act, LyXAction::ReadOnly)
1055             && !lyxaction.funcHasFlag(act, LyXAction::NoBuffer)) {
1056                 flag.message(from_utf8(N_("This portion of the document is deleted.")));
1057                 flag.setEnabled(false);
1058                 return true;
1059         }
1060
1061         Cursor & cur = d->cursor_;
1062
1063         if (cur.getStatus(cmd, flag))
1064                 return true;
1065
1066         switch (act) {
1067
1068         // FIXME: This is a bit problematic because we don't check if this is
1069         // a document BufferView or not for these LFUNs. We probably have to
1070         // dispatch both to currentBufferView() and, if that fails,
1071         // to documentBufferView(); same as we do now for current Buffer and
1072         // document Buffer. Ideally those LFUN should go to Buffer as they
1073         // operate on the full Buffer and the cursor is only needed either for
1074         // an Undo record or to restore a cursor position. But we don't know
1075         // how to do that inside Buffer of course.
1076         case LFUN_BUFFER_PARAMS_APPLY:
1077         case LFUN_LAYOUT_MODULES_CLEAR:
1078         case LFUN_LAYOUT_MODULE_ADD:
1079         case LFUN_LAYOUT_RELOAD:
1080         case LFUN_TEXTCLASS_APPLY:
1081         case LFUN_TEXTCLASS_LOAD:
1082                 flag.setEnabled(!buffer_.isReadonly());
1083                 break;
1084
1085         case LFUN_UNDO:
1086                 // We do not use the LyXAction flag for readonly because Undo sets the
1087                 // buffer clean/dirty status by itself.
1088                 flag.setEnabled(!buffer_.isReadonly() && buffer_.undo().hasUndoStack());
1089                 break;
1090         case LFUN_REDO:
1091                 // We do not use the LyXAction flag for readonly because Redo sets the
1092                 // buffer clean/dirty status by itself.
1093                 flag.setEnabled(!buffer_.isReadonly() && buffer_.undo().hasRedoStack());
1094                 break;
1095         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
1096         case LFUN_FILE_INSERT_PLAINTEXT: {
1097                 docstring const fname = cmd.argument();
1098                 if (!FileName::isAbsolute(to_utf8(fname))) {
1099                         flag.message(_("Absolute filename expected."));
1100                         return false;
1101                 }
1102                 flag.setEnabled(cur.inTexted());
1103                 break;
1104         }
1105         case LFUN_FILE_INSERT:
1106         case LFUN_BOOKMARK_SAVE:
1107                 // FIXME: Actually, these LFUNS should be moved to Text
1108                 flag.setEnabled(cur.inTexted());
1109                 break;
1110
1111         case LFUN_FONT_STATE:
1112         case LFUN_LABEL_INSERT:
1113         case LFUN_INFO_INSERT:
1114         case LFUN_PARAGRAPH_GOTO:
1115         case LFUN_NOTE_NEXT:
1116         case LFUN_REFERENCE_NEXT:
1117         case LFUN_WORD_FIND:
1118         case LFUN_WORD_FIND_FORWARD:
1119         case LFUN_WORD_FIND_BACKWARD:
1120         case LFUN_WORD_REPLACE:
1121         case LFUN_MARK_OFF:
1122         case LFUN_MARK_ON:
1123         case LFUN_MARK_TOGGLE:
1124         case LFUN_SCREEN_RECENTER:
1125         case LFUN_SCREEN_SHOW_CURSOR:
1126         case LFUN_BIBTEX_DATABASE_ADD:
1127         case LFUN_BIBTEX_DATABASE_DEL:
1128         case LFUN_STATISTICS:
1129         case LFUN_KEYMAP_OFF:
1130         case LFUN_KEYMAP_PRIMARY:
1131         case LFUN_KEYMAP_SECONDARY:
1132         case LFUN_KEYMAP_TOGGLE:
1133         case LFUN_INSET_SELECT_ALL:
1134                 flag.setEnabled(true);
1135                 break;
1136
1137         case LFUN_WORD_FINDADV: {
1138                 FindAndReplaceOptions opt;
1139                 istringstream iss(to_utf8(cmd.argument()));
1140                 iss >> opt;
1141                 flag.setEnabled(opt.repl_buf_name.empty()
1142                                 || !buffer_.isReadonly());
1143                 break;
1144         }
1145
1146         case LFUN_LABEL_GOTO:
1147                 flag.setEnabled(!cmd.argument().empty()
1148                     || getInsetByCode<InsetRef>(cur, REF_CODE));
1149                 break;
1150
1151         case LFUN_CHANGES_MERGE:
1152         case LFUN_CHANGE_NEXT:
1153         case LFUN_CHANGE_PREVIOUS:
1154         case LFUN_ALL_CHANGES_ACCEPT:
1155         case LFUN_ALL_CHANGES_REJECT:
1156                 flag.setEnabled(buffer_.areChangesPresent());
1157                 break;
1158
1159         case LFUN_SCREEN_UP:
1160         case LFUN_SCREEN_DOWN:
1161         case LFUN_SCROLL:
1162         case LFUN_SCREEN_UP_SELECT:
1163         case LFUN_SCREEN_DOWN_SELECT:
1164         case LFUN_INSET_FORALL:
1165                 flag.setEnabled(true);
1166                 break;
1167
1168         case LFUN_LAYOUT_TABULAR:
1169                 flag.setEnabled(cur.innerInsetOfType(TABULAR_CODE));
1170                 break;
1171
1172         case LFUN_LAYOUT:
1173                 flag.setEnabled(!cur.inset().forcePlainLayout(cur.idx()));
1174                 break;
1175
1176         case LFUN_LAYOUT_PARAGRAPH:
1177                 flag.setEnabled(cur.inset().allowParagraphCustomization(cur.idx()));
1178                 break;
1179
1180         case LFUN_BRANCH_ADD_INSERT:
1181                 flag.setEnabled(!(cur.inTexted() && cur.paragraph().isPassThru()));
1182                 break;
1183
1184         case LFUN_DIALOG_SHOW_NEW_INSET:
1185                 // FIXME: this is wrong, but I do not understand the
1186                 // intent (JMarc)
1187                 if (cur.inset().lyxCode() == CAPTION_CODE)
1188                         return cur.inset().getStatus(cur, cmd, flag);
1189                 // FIXME we should consider passthru paragraphs too.
1190                 flag.setEnabled(!(cur.inTexted() && cur.paragraph().isPassThru()));
1191                 break;
1192
1193         case LFUN_CITATION_INSERT: {
1194                 FuncRequest fr(LFUN_INSET_INSERT, "citation");
1195                 // FIXME: This could turn in a recursive hell.
1196                 // Shouldn't we use Buffer::getStatus() instead?
1197                 flag.setEnabled(lyx::getStatus(fr).enabled());
1198                 break;
1199         }
1200         case LFUN_INSET_APPLY: {
1201                 string const name = cmd.getArg(0);
1202                 Inset * inset = editedInset(name);
1203                 if (inset) {
1204                         FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
1205                         if (!inset->getStatus(cur, fr, flag)) {
1206                                 // Every inset is supposed to handle this
1207                                 LASSERT(false, break);
1208                         }
1209                 } else {
1210                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
1211                         flag = lyx::getStatus(fr);
1212                 }
1213                 break;
1214         }
1215
1216         default:
1217                 return false;
1218         }
1219
1220         return true;
1221 }
1222
1223
1224 Inset * BufferView::editedInset(string const & name) const
1225 {
1226         map<string, Inset *>::const_iterator it = d->edited_insets_.find(name);
1227         return it == d->edited_insets_.end() ? 0 : it->second;
1228 }
1229
1230
1231 void BufferView::editInset(string const & name, Inset * inset)
1232 {
1233         d->edited_insets_[name] = inset;
1234 }
1235
1236
1237 void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
1238 {
1239         LYXERR(Debug::ACTION, "BufferView::dispatch: cmd: " << cmd);
1240
1241         string const argument = to_utf8(cmd.argument());
1242         Cursor & cur = d->cursor_;
1243         Cursor old = cur;
1244
1245         // Don't dispatch function that does not apply to internal buffers.
1246         if (buffer_.isInternal()
1247             && lyxaction.funcHasFlag(cmd.action(), LyXAction::NoInternal))
1248                 return;
1249
1250         // We'll set this back to false if need be.
1251         bool dispatched = true;
1252         buffer_.undo().beginUndoGroup();
1253
1254         FuncCode const act = cmd.action();
1255         switch (act) {
1256
1257         case LFUN_BUFFER_PARAMS_APPLY: {
1258                 DocumentClassConstPtr olddc = buffer_.params().documentClassPtr();
1259                 cur.recordUndoBufferParams();
1260                 istringstream ss(to_utf8(cmd.argument()));
1261                 Lexer lex;
1262                 lex.setStream(ss);
1263                 int const unknown_tokens = buffer_.readHeader(lex);
1264                 if (unknown_tokens != 0) {
1265                         LYXERR0("Warning in LFUN_BUFFER_PARAMS_APPLY!\n"
1266                                                 << unknown_tokens << " unknown token"
1267                                                 << (unknown_tokens == 1 ? "" : "s"));
1268                 }
1269                 updateDocumentClass(olddc);
1270
1271                 // We are most certainly here because of a change in the document
1272                 // It is then better to make sure that all dialogs are in sync with
1273                 // current document settings.
1274                 dr.screenUpdate(Update::Force | Update::FitCursor);
1275                 dr.forceBufferUpdate();
1276                 break;
1277         }
1278
1279         case LFUN_LAYOUT_MODULES_CLEAR: {
1280                 // FIXME: this modifies the document in cap::switchBetweenClasses
1281                 //  without calling recordUndo. Fix this before using
1282                 //  recordUndoBufferParams().
1283                 cur.recordUndoFullBuffer();
1284                 buffer_.params().clearLayoutModules();
1285                 makeDocumentClass();
1286                 dr.screenUpdate(Update::Force);
1287                 dr.forceBufferUpdate();
1288                 break;
1289         }
1290
1291         case LFUN_LAYOUT_MODULE_ADD: {
1292                 BufferParams const & params = buffer_.params();
1293                 if (!params.layoutModuleCanBeAdded(argument)) {
1294                         LYXERR0("Module `" << argument <<
1295                                 "' cannot be added due to failed requirements or "
1296                                 "conflicts with installed modules.");
1297                         break;
1298                 }
1299                 // FIXME: this modifies the document in cap::switchBetweenClasses
1300                 //  without calling recordUndo. Fix this before using
1301                 //  recordUndoBufferParams().
1302                 cur.recordUndoFullBuffer();
1303                 buffer_.params().addLayoutModule(argument);
1304                 makeDocumentClass();
1305                 dr.screenUpdate(Update::Force);
1306                 dr.forceBufferUpdate();
1307                 break;
1308         }
1309
1310         case LFUN_TEXTCLASS_APPLY: {
1311                 // since this shortcircuits, the second call is made only if
1312                 // the first fails
1313                 bool const success =
1314                         LayoutFileList::get().load(argument, buffer_.temppath()) ||
1315                         LayoutFileList::get().load(argument, buffer_.filePath());
1316                 if (!success) {
1317                         docstring s = bformat(_("The document class `%1$s' "
1318                                                  "could not be loaded."), from_utf8(argument));
1319                         frontend::Alert::error(_("Could not load class"), s);
1320                         break;
1321                 }
1322
1323                 LayoutFile const * old_layout = buffer_.params().baseClass();
1324                 LayoutFile const * new_layout = &(LayoutFileList::get()[argument]);
1325
1326                 if (old_layout == new_layout)
1327                         // nothing to do
1328                         break;
1329
1330                 // Save the old, possibly modular, layout for use in conversion.
1331                 // FIXME: this modifies the document in cap::switchBetweenClasses
1332                 //  without calling recordUndo. Fix this before using
1333                 //  recordUndoBufferParams().
1334                 cur.recordUndoFullBuffer();
1335                 buffer_.params().setBaseClass(argument);
1336                 makeDocumentClass();
1337                 dr.screenUpdate(Update::Force);
1338                 dr.forceBufferUpdate();
1339                 break;
1340         }
1341
1342         case LFUN_TEXTCLASS_LOAD: {
1343                 // since this shortcircuits, the second call is made only if
1344                 // the first fails
1345                 bool const success =
1346                         LayoutFileList::get().load(argument, buffer_.temppath()) ||
1347                         LayoutFileList::get().load(argument, buffer_.filePath());
1348                 if (!success) {
1349                         docstring s = bformat(_("The document class `%1$s' "
1350                                                  "could not be loaded."), from_utf8(argument));
1351                         frontend::Alert::error(_("Could not load class"), s);
1352                 }
1353                 break;
1354         }
1355
1356         case LFUN_LAYOUT_RELOAD: {
1357                 LayoutFileIndex bc = buffer_.params().baseClassID();
1358                 LayoutFileList::get().reset(bc);
1359                 buffer_.params().setBaseClass(bc);
1360                 makeDocumentClass();
1361                 dr.screenUpdate(Update::Force);
1362                 dr.forceBufferUpdate();
1363                 break;
1364         }
1365
1366         case LFUN_UNDO:
1367                 dr.setMessage(_("Undo"));
1368                 cur.clearSelection();
1369                 if (!cur.textUndo())
1370                         dr.setMessage(_("No further undo information"));
1371                 else
1372                         dr.screenUpdate(Update::Force | Update::FitCursor);
1373                 dr.forceBufferUpdate();
1374                 break;
1375
1376         case LFUN_REDO:
1377                 dr.setMessage(_("Redo"));
1378                 cur.clearSelection();
1379                 if (!cur.textRedo())
1380                         dr.setMessage(_("No further redo information"));
1381                 else
1382                         dr.screenUpdate(Update::Force | Update::FitCursor);
1383                 dr.forceBufferUpdate();
1384                 break;
1385
1386         case LFUN_FONT_STATE:
1387                 dr.setMessage(cur.currentState(false));
1388                 break;
1389
1390         case LFUN_BOOKMARK_SAVE:
1391                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
1392                 break;
1393
1394         case LFUN_LABEL_GOTO: {
1395                 docstring label = cmd.argument();
1396                 if (label.empty()) {
1397                         InsetRef * inset =
1398                                 getInsetByCode<InsetRef>(cur, REF_CODE);
1399                         if (inset) {
1400                                 label = inset->getParam("reference");
1401                                 // persistent=false: use temp_bookmark
1402                                 saveBookmark(0);
1403                         }
1404                 }
1405                 if (!label.empty()) {
1406                         gotoLabel(label);
1407                         // at the moment, this is redundant, since gotoLabel will
1408                         // eventually call LFUN_PARAGRAPH_GOTO, but it seems best
1409                         // to have it here.
1410                         dr.screenUpdate(Update::Force | Update::FitCursor);
1411                 }
1412                 break;
1413         }
1414
1415         case LFUN_PARAGRAPH_GOTO: {
1416                 int const id = convert<int>(cmd.getArg(0));
1417                 pos_type const pos = convert<int>(cmd.getArg(1));
1418                 if (id < 0)
1419                         break;
1420                 string const str_id_end = cmd.getArg(2);
1421                 string const str_pos_end = cmd.getArg(3);
1422                 int i = 0;
1423                 for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
1424                         b = theBufferList().next(b)) {
1425
1426                         Cursor cur(*this);
1427                         cur.setCursor(b->getParFromID(id));
1428                         if (cur.atEnd()) {
1429                                 LYXERR(Debug::INFO, "No matching paragraph found! [" << id << "].");
1430                                 ++i;
1431                                 continue;
1432                         }
1433                         LYXERR(Debug::INFO, "Paragraph " << cur.paragraph().id()
1434                                 << " found in buffer `"
1435                                 << b->absFileName() << "'.");
1436
1437                         if (b == &buffer_) {
1438                                 bool success;
1439                                 if (str_id_end.empty() || str_pos_end.empty()) {
1440                                         // Set the cursor
1441                                         cur.pos() = pos;
1442                                         mouseSetCursor(cur);
1443                                         success = true;
1444                                 } else {
1445                                         int const id_end = convert<int>(str_id_end);
1446                                         pos_type const pos_end = convert<int>(str_pos_end);
1447                                         success = setCursorFromEntries({id, pos},
1448                                                                        {id_end, pos_end});
1449                                 }
1450                                 if (success)
1451                                         dr.screenUpdate(Update::Force | Update::FitCursor);
1452                         } else {
1453                                 // Switch to other buffer view and resend cmd
1454                                 lyx::dispatch(FuncRequest(
1455                                         LFUN_BUFFER_SWITCH, b->absFileName()));
1456                                 lyx::dispatch(cmd);
1457                         }
1458                         break;
1459                 }
1460                 break;
1461         }
1462
1463         case LFUN_NOTE_NEXT:
1464                 gotoInset(this, NOTE_CODE, false);
1465                 break;
1466
1467         case LFUN_REFERENCE_NEXT: {
1468                 vector<InsetCode> tmp;
1469                 tmp.push_back(LABEL_CODE);
1470                 tmp.push_back(REF_CODE);
1471                 gotoInset(this, tmp, true);
1472                 break;
1473         }
1474
1475         case LFUN_CHANGE_NEXT:
1476                 findNextChange(this);
1477                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1478                 dr.screenUpdate(Update::Force | Update::FitCursor);
1479                 break;
1480
1481         case LFUN_CHANGE_PREVIOUS:
1482                 findPreviousChange(this);
1483                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1484                 dr.screenUpdate(Update::Force | Update::FitCursor);
1485                 break;
1486
1487         case LFUN_CHANGES_MERGE:
1488                 if (findNextChange(this) || findPreviousChange(this)) {
1489                         dr.screenUpdate(Update::Force | Update::FitCursor);
1490                         dr.forceBufferUpdate();
1491                         showDialog("changes");
1492                 }
1493                 break;
1494
1495         case LFUN_ALL_CHANGES_ACCEPT:
1496                 // select complete document
1497                 cur.reset();
1498                 cur.selHandle(true);
1499                 buffer_.text().cursorBottom(cur);
1500                 // accept everything in a single step to support atomic undo
1501                 buffer_.text().acceptOrRejectChanges(cur, Text::ACCEPT);
1502                 cur.resetAnchor();
1503                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1504                 dr.screenUpdate(Update::Force | Update::FitCursor);
1505                 dr.forceBufferUpdate();
1506                 break;
1507
1508         case LFUN_ALL_CHANGES_REJECT:
1509                 // select complete document
1510                 cur.reset();
1511                 cur.selHandle(true);
1512                 buffer_.text().cursorBottom(cur);
1513                 // reject everything in a single step to support atomic undo
1514                 // Note: reject does not work recursively; the user may have to repeat the operation
1515                 buffer_.text().acceptOrRejectChanges(cur, Text::REJECT);
1516                 cur.resetAnchor();
1517                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1518                 dr.screenUpdate(Update::Force | Update::FitCursor);
1519                 dr.forceBufferUpdate();
1520                 break;
1521
1522         case LFUN_WORD_FIND_FORWARD:
1523         case LFUN_WORD_FIND_BACKWARD: {
1524                 // FIXME THREAD
1525                 // Would it maybe be better if this variable were view specific anyway?
1526                 static docstring last_search;
1527                 docstring searched_string;
1528
1529                 if (!cmd.argument().empty()) {
1530                         last_search = cmd.argument();
1531                         searched_string = cmd.argument();
1532                 } else {
1533                         searched_string = last_search;
1534                 }
1535
1536                 if (searched_string.empty())
1537                         break;
1538
1539                 bool const fw = act == LFUN_WORD_FIND_FORWARD;
1540                 docstring const data =
1541                         find2string(searched_string, true, false, fw);
1542                 bool found = lyxfind(this, FuncRequest(LFUN_WORD_FIND, data));
1543                 if (found)
1544                         dr.screenUpdate(Update::Force | Update::FitCursor);
1545                 break;
1546         }
1547
1548         case LFUN_WORD_FIND: {
1549                 FuncRequest req = cmd;
1550                 if (cmd.argument().empty() && !d->search_request_cache_.argument().empty())
1551                         req = d->search_request_cache_;
1552                 if (req.argument().empty()) {
1553                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, "findreplace"));
1554                         break;
1555                 }
1556                 if (lyxfind(this, req))
1557                         dr.screenUpdate(Update::Force | Update::FitCursor);
1558
1559                 d->search_request_cache_ = req;
1560                 break;
1561         }
1562
1563         case LFUN_WORD_REPLACE: {
1564                 bool has_deleted = false;
1565                 if (cur.selection()) {
1566                         DocIterator beg = cur.selectionBegin();
1567                         DocIterator end = cur.selectionEnd();
1568                         if (beg.pit() == end.pit()) {
1569                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
1570                                         if (!cur.inMathed() && cur.paragraph().isDeleted(p)) {
1571                                                 has_deleted = true;
1572                                                 break;
1573                                         }
1574                                 }
1575                         }
1576                 }
1577                 if (lyxreplace(this, cmd, has_deleted)) {
1578                         dr.forceBufferUpdate();
1579                         dr.screenUpdate(Update::Force | Update::FitCursor);
1580                 }
1581                 break;
1582         }
1583
1584         case LFUN_WORD_FINDADV: {
1585                 FindAndReplaceOptions opt;
1586                 istringstream iss(to_utf8(cmd.argument()));
1587                 iss >> opt;
1588                 if (findAdv(this, opt)) {
1589                         dr.screenUpdate(Update::Force | Update::FitCursor);
1590                         cur.dispatched();
1591                         dispatched = true;
1592                 } else {
1593                         cur.undispatched();
1594                         dispatched = false;
1595                 }
1596                 break;
1597         }
1598
1599         case LFUN_MARK_OFF:
1600                 cur.clearSelection();
1601                 dr.setMessage(from_utf8(N_("Mark off")));
1602                 break;
1603
1604         case LFUN_MARK_ON:
1605                 cur.clearSelection();
1606                 cur.setMark(true);
1607                 dr.setMessage(from_utf8(N_("Mark on")));
1608                 break;
1609
1610         case LFUN_MARK_TOGGLE:
1611                 cur.selection(false);
1612                 if (cur.mark()) {
1613                         cur.setMark(false);
1614                         dr.setMessage(from_utf8(N_("Mark removed")));
1615                 } else {
1616                         cur.setMark(true);
1617                         dr.setMessage(from_utf8(N_("Mark set")));
1618                 }
1619                 cur.resetAnchor();
1620                 break;
1621
1622         case LFUN_SCREEN_SHOW_CURSOR:
1623                 showCursor();
1624                 break;
1625
1626         case LFUN_SCREEN_RECENTER:
1627                 recenter();
1628                 break;
1629
1630         case LFUN_BIBTEX_DATABASE_ADD: {
1631                 Cursor tmpcur = cur;
1632                 findInset(tmpcur, BIBTEX_CODE, false);
1633                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1634                                                 BIBTEX_CODE);
1635                 if (inset) {
1636                         if (inset->addDatabase(cmd.argument()))
1637                                 dr.forceBufferUpdate();
1638                 }
1639                 break;
1640         }
1641
1642         case LFUN_BIBTEX_DATABASE_DEL: {
1643                 Cursor tmpcur = cur;
1644                 findInset(tmpcur, BIBTEX_CODE, false);
1645                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1646                                                 BIBTEX_CODE);
1647                 if (inset) {
1648                         if (inset->delDatabase(cmd.argument()))
1649                                 dr.forceBufferUpdate();
1650                 }
1651                 break;
1652         }
1653
1654         case LFUN_STATISTICS: {
1655                 DocIterator from, to;
1656                 if (cur.selection()) {
1657                         from = cur.selectionBegin();
1658                         to = cur.selectionEnd();
1659                 } else {
1660                         from = doc_iterator_begin(&buffer_);
1661                         to = doc_iterator_end(&buffer_);
1662                 }
1663                 buffer_.updateStatistics(from, to);
1664                 int const words = buffer_.wordCount();
1665                 int const chars = buffer_.charCount(false);
1666                 int const chars_blanks = buffer_.charCount(true);
1667                 docstring message;
1668                 if (cur.selection())
1669                         message = _("Statistics for the selection:");
1670                 else
1671                         message = _("Statistics for the document:");
1672                 message += "\n\n";
1673                 if (words != 1)
1674                         message += bformat(_("%1$d words"), words);
1675                 else
1676                         message += _("One word");
1677                 message += "\n";
1678                 if (chars_blanks != 1)
1679                         message += bformat(_("%1$d characters (including blanks)"),
1680                                           chars_blanks);
1681                 else
1682                         message += _("One character (including blanks)");
1683                 message += "\n";
1684                 if (chars != 1)
1685                         message += bformat(_("%1$d characters (excluding blanks)"),
1686                                           chars);
1687                 else
1688                         message += _("One character (excluding blanks)");
1689
1690                 Alert::information(_("Statistics"), message);
1691         }
1692                 break;
1693
1694         case LFUN_SCREEN_UP:
1695         case LFUN_SCREEN_DOWN: {
1696                 Point p = getPos(cur);
1697                 // This code has been commented out to enable to scroll down a
1698                 // document, even if there are large insets in it (see bug #5465).
1699                 /*if (p.y_ < 0 || p.y_ > height_) {
1700                         // The cursor is off-screen so recenter before proceeding.
1701                         showCursor();
1702                         p = getPos(cur);
1703                 }*/
1704                 int const scrolled = scroll(act == LFUN_SCREEN_UP
1705                         ? -height_ : height_);
1706                 if (act == LFUN_SCREEN_UP && scrolled > -height_)
1707                         p = Point(0, 0);
1708                 if (act == LFUN_SCREEN_DOWN && scrolled < height_)
1709                         p = Point(width_, height_);
1710                 bool const in_texted = cur.inTexted();
1711                 cur.setCursor(doc_iterator_begin(cur.buffer()));
1712                 cur.selHandle(false);
1713                 // Force an immediate computation of metrics because we need it below
1714                 processUpdateFlags(Update::Force);
1715
1716                 d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_,
1717                         true, act == LFUN_SCREEN_UP);
1718                 //FIXME: what to do with cur.x_target()?
1719                 bool update = in_texted && cur.bv().checkDepm(cur, old);
1720                 cur.finishUndo();
1721
1722                 if (update || cur.mark())
1723                         dr.screenUpdate(Update::Force | Update::FitCursor);
1724                 if (update)
1725                         dr.forceBufferUpdate();
1726                 break;
1727         }
1728
1729         case LFUN_SCROLL: {
1730                 string const scroll_type = cmd.getArg(0);
1731                 int scroll_step = 0;
1732                 if (scroll_type == "line")
1733                         scroll_step = d->scrollbarParameters_.single_step;
1734                 else if (scroll_type == "page")
1735                         scroll_step = d->scrollbarParameters_.page_step;
1736                 else
1737                         return;
1738                 string const scroll_quantity = cmd.getArg(1);
1739                 if (scroll_quantity == "up")
1740                         scrollUp(scroll_step);
1741                 else if (scroll_quantity == "down")
1742                         scrollDown(scroll_step);
1743                 else {
1744                         int const scroll_value = convert<int>(scroll_quantity);
1745                         if (scroll_value)
1746                                 scroll(scroll_step * scroll_value);
1747                 }
1748                 dr.screenUpdate(Update::ForceDraw);
1749                 dr.forceBufferUpdate();
1750                 break;
1751         }
1752
1753         case LFUN_SCREEN_UP_SELECT: {
1754                 // FIXME: why is the algorithm different from LFUN_SCREEN_UP?
1755                 cur.selHandle(true);
1756                 if (isTopScreen()) {
1757                         lyx::dispatch(FuncRequest(LFUN_BUFFER_BEGIN_SELECT));
1758                         cur.finishUndo();
1759                         break;
1760                 }
1761                 int y = getPos(cur).y_;
1762                 int const ymin = y - height_ + defaultRowHeight();
1763                 while (y > ymin && cur.up())
1764                         y = getPos(cur).y_;
1765
1766                 cur.finishUndo();
1767                 dr.screenUpdate(Update::SinglePar | Update::FitCursor);
1768                 break;
1769         }
1770
1771         case LFUN_SCREEN_DOWN_SELECT: {
1772                 // FIXME: why is the algorithm different from LFUN_SCREEN_DOWN?
1773                 cur.selHandle(true);
1774                 if (isBottomScreen()) {
1775                         lyx::dispatch(FuncRequest(LFUN_BUFFER_END_SELECT));
1776                         cur.finishUndo();
1777                         break;
1778                 }
1779                 int y = getPos(cur).y_;
1780                 int const ymax = y + height_ - defaultRowHeight();
1781                 while (y < ymax && cur.down())
1782                         y = getPos(cur).y_;
1783
1784                 cur.finishUndo();
1785                 dr.screenUpdate(Update::SinglePar | Update::FitCursor);
1786                 break;
1787         }
1788
1789
1790         case LFUN_INSET_SELECT_ALL: {
1791                 // true if all cells are selected
1792                 bool const all_selected = cur.depth() > 1
1793                     && cur.selBegin().at_begin()
1794                     && cur.selEnd().at_end();
1795                 // true if some cells are selected
1796                 bool const cells_selected = cur.depth() > 1
1797                     && cur.selBegin().at_cell_begin()
1798                         && cur.selEnd().at_cell_end();
1799                 if (all_selected || (cells_selected && !cur.inset().isTable())) {
1800                         // All the contents of the inset if selected, or only at
1801                         // least one cell but inset is not a table.
1802                         // Select the inset from outside.
1803                         cur.pop();
1804                         cur.resetAnchor();
1805                         cur.selection(true);
1806                         cur.posForward();
1807                 } else if (cells_selected) {
1808                         // At least one complete cell is selected and inset is a table.
1809                         // Select all cells
1810                         cur.idx() = 0;
1811                         cur.pos() = 0;
1812                         cur.resetAnchor();
1813                         cur.selection(true);
1814                         cur.idx() = cur.lastidx();
1815                         cur.pos() = cur.lastpos();
1816                 } else {
1817                         // select current cell
1818                         cur.pit() = 0;
1819                         cur.pos() = 0;
1820                         cur.resetAnchor();
1821                         cur.selection(true);
1822                         cur.pit() = cur.lastpit();
1823                         cur.pos() = cur.lastpos();
1824                 }
1825                 cur.setCurrentFont();
1826                 dr.screenUpdate(Update::Force);
1827                 break;
1828         }
1829
1830
1831         // This would be in Buffer class if only Cursor did not
1832         // require a bufferview
1833         case LFUN_INSET_FORALL: {
1834                 docstring const name = from_utf8(cmd.getArg(0));
1835                 string const commandstr = cmd.getLongArg(1);
1836                 FuncRequest const fr = lyxaction.lookupFunc(commandstr);
1837
1838                 // an arbitrary number to limit number of iterations
1839                 const int max_iter = 100000;
1840                 int iterations = 0;
1841                 Cursor & cur = d->cursor_;
1842                 Cursor const savecur = cur;
1843                 cur.reset();
1844                 if (!cur.nextInset())
1845                         cur.forwardInset();
1846                 cur.beginUndoGroup();
1847                 while(cur && iterations < max_iter) {
1848                         Inset * const ins = cur.nextInset();
1849                         if (!ins)
1850                                 break;
1851                         docstring insname = ins->layoutName();
1852                         while (!insname.empty()) {
1853                                 if (insname == name || name == from_utf8("*")) {
1854                                         cur.recordUndo();
1855                                         lyx::dispatch(fr, dr);
1856                                         ++iterations;
1857                                         break;
1858                                 }
1859                                 size_t const i = insname.rfind(':');
1860                                 if (i == string::npos)
1861                                         break;
1862                                 insname = insname.substr(0, i);
1863                         }
1864                         // if we did not delete the inset, skip it
1865                         if (!cur.nextInset() || cur.nextInset() == ins)
1866                                 cur.forwardInset();
1867                 }
1868                 cur = savecur;
1869                 cur.fixIfBroken();
1870                 /** This is a dummy undo record only to remember the cursor
1871                  * that has just been set; this will be used on a redo action
1872                  * (see ticket #10097)
1873
1874                  * FIXME: a better fix would be to have a way to set the
1875                  * cursor value directly, but I am not sure it is worth it.
1876                  */
1877                 cur.recordUndo();
1878                 cur.endUndoGroup();
1879                 dr.screenUpdate(Update::Force);
1880                 dr.forceBufferUpdate();
1881
1882                 if (iterations >= max_iter) {
1883                         dr.setError(true);
1884                         dr.setMessage(bformat(_("`inset-forall' interrupted because number of actions is larger than %1$d"), max_iter));
1885                 } else
1886                         dr.setMessage(bformat(_("Applied \"%1$s\" to %2$d insets"), from_utf8(commandstr), iterations));
1887                 break;
1888         }
1889
1890
1891         case LFUN_BRANCH_ADD_INSERT: {
1892                 docstring branch_name = from_utf8(cmd.getArg(0));
1893                 if (branch_name.empty())
1894                         if (!Alert::askForText(branch_name, _("Branch name")) ||
1895                                                 branch_name.empty())
1896                                 break;
1897
1898                 DispatchResult drtmp;
1899                 buffer_.dispatch(FuncRequest(LFUN_BRANCH_ADD, branch_name), drtmp);
1900                 if (drtmp.error()) {
1901                         Alert::warning(_("Branch already exists"), drtmp.message());
1902                         break;
1903                 }
1904                 BranchList & branch_list = buffer_.params().branchlist();
1905                 vector<docstring> const branches =
1906                         getVectorFromString(branch_name, branch_list.separator());
1907                 for (vector<docstring>::const_iterator it = branches.begin();
1908                      it != branches.end(); ++it) {
1909                         branch_name = *it;
1910                         lyx::dispatch(FuncRequest(LFUN_BRANCH_INSERT, branch_name));
1911                 }
1912                 break;
1913         }
1914
1915         case LFUN_KEYMAP_OFF:
1916                 getIntl().keyMapOn(false);
1917                 break;
1918
1919         case LFUN_KEYMAP_PRIMARY:
1920                 getIntl().keyMapPrim();
1921                 break;
1922
1923         case LFUN_KEYMAP_SECONDARY:
1924                 getIntl().keyMapSec();
1925                 break;
1926
1927         case LFUN_KEYMAP_TOGGLE:
1928                 getIntl().toggleKeyMap();
1929                 break;
1930
1931         case LFUN_DIALOG_SHOW_NEW_INSET: {
1932                 string const name = cmd.getArg(0);
1933                 string data = trim(to_utf8(cmd.argument()).substr(name.size()));
1934                 if (decodeInsetParam(name, data, buffer_))
1935                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, name + " " + data));
1936                 else
1937                         lyxerr << "Inset type '" << name <<
1938                         "' not recognized in LFUN_DIALOG_SHOW_NEW_INSET" <<  endl;
1939                 break;
1940         }
1941
1942         case LFUN_CITATION_INSERT: {
1943                 if (argument.empty()) {
1944                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW_NEW_INSET, "citation"));
1945                         break;
1946                 }
1947                 // we can have one optional argument, delimited by '|'
1948                 // citation-insert <key>|<text_before>
1949                 // this should be enhanced to also support text_after
1950                 // and citation style
1951                 string arg = argument;
1952                 string opt1;
1953                 if (contains(argument, "|")) {
1954                         arg = token(argument, '|', 0);
1955                         opt1 = token(argument, '|', 1);
1956                 }
1957
1958                 // if our cursor is directly in front of or behind a citation inset,
1959                 // we will instead add the new key to it.
1960                 Inset * inset = cur.nextInset();
1961                 if (!inset || inset->lyxCode() != CITE_CODE)
1962                         inset = cur.prevInset();
1963                 if (inset && inset->lyxCode() == CITE_CODE) {
1964                         InsetCitation * icite = static_cast<InsetCitation *>(inset);
1965                         if (icite->addKey(arg)) {
1966                                 dr.forceBufferUpdate();
1967                                 dr.screenUpdate(Update::FitCursor | Update::SinglePar);
1968                                 if (!opt1.empty())
1969                                         LYXERR0("Discarding optional argument to citation-insert.");
1970                         }
1971                         dispatched = true;
1972                         break;
1973                 }
1974                 InsetCommandParams icp(CITE_CODE);
1975                 icp["key"] = from_utf8(arg);
1976                 if (!opt1.empty())
1977                         icp["before"] = from_utf8(opt1);
1978                 string icstr = InsetCommand::params2string(icp);
1979                 FuncRequest fr(LFUN_INSET_INSERT, icstr);
1980                 lyx::dispatch(fr);
1981                 break;
1982         }
1983
1984         case LFUN_INSET_APPLY: {
1985                 string const name = cmd.getArg(0);
1986                 Inset * inset = editedInset(name);
1987                 if (!inset) {
1988                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
1989                         lyx::dispatch(fr);
1990                         break;
1991                 }
1992                 // put cursor in front of inset.
1993                 if (!setCursorFromInset(inset)) {
1994                         LASSERT(false, break);
1995                 }
1996                 cur.recordUndo();
1997                 FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
1998                 inset->dispatch(cur, fr);
1999                 dr.screenUpdate(cur.result().screenUpdate());
2000                 if (cur.result().needBufferUpdate())
2001                         dr.forceBufferUpdate();
2002                 break;
2003         }
2004
2005         // FIXME:
2006         // The change of language of buffer belongs to the Buffer class.
2007         // We have to do it here because we need a cursor for Undo.
2008         // When Undo::recordUndoBufferParams() is implemented someday
2009         // LFUN_BUFFER_LANGUAGE should be handled by the Buffer class.
2010         case LFUN_BUFFER_LANGUAGE: {
2011                 Language const * oldL = buffer_.params().language;
2012                 Language const * newL = languages.getLanguage(argument);
2013                 if (!newL || oldL == newL)
2014                         break;
2015                 if (oldL->rightToLeft() == newL->rightToLeft()) {
2016                         cur.recordUndoFullBuffer();
2017                         buffer_.changeLanguage(oldL, newL);
2018                         cur.setCurrentFont();
2019                         dr.forceBufferUpdate();
2020                 }
2021                 break;
2022         }
2023
2024         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
2025         case LFUN_FILE_INSERT_PLAINTEXT: {
2026                 bool const as_paragraph = (act == LFUN_FILE_INSERT_PLAINTEXT_PARA);
2027                 string const fname = to_utf8(cmd.argument());
2028                 if (!FileName::isAbsolute(fname))
2029                         dr.setMessage(_("Absolute filename expected."));
2030                 else
2031                         insertPlaintextFile(FileName(fname), as_paragraph);
2032                 break;
2033         }
2034
2035         default:
2036                 // OK, so try the Buffer itself...
2037                 buffer_.dispatch(cmd, dr);
2038                 dispatched = dr.dispatched();
2039                 break;
2040         }
2041
2042         buffer_.undo().endUndoGroup();
2043         dr.dispatched(dispatched);
2044
2045         // NOTE: The code below is copied from Cursor::dispatch. If you
2046         // need to modify this, please update the other one too.
2047
2048         // notify insets we just entered/left
2049         if (cursor() != old) {
2050                 old.beginUndoGroup();
2051                 old.fixIfBroken();
2052                 bool badcursor = notifyCursorLeavesOrEnters(old, cursor());
2053                 if (badcursor) {
2054                         cursor().fixIfBroken();
2055                         resetInlineCompletionPos();
2056                 }
2057                 old.endUndoGroup();
2058         }
2059 }
2060
2061
2062 docstring const BufferView::requestSelection()
2063 {
2064         Cursor & cur = d->cursor_;
2065
2066         LYXERR(Debug::SELECTION, "requestSelection: cur.selection: " << cur.selection());
2067         if (!cur.selection()) {
2068                 d->xsel_cache_.set = false;
2069                 return docstring();
2070         }
2071
2072         LYXERR(Debug::SELECTION, "requestSelection: xsel_cache.set: " << d->xsel_cache_.set);
2073         if (!d->xsel_cache_.set ||
2074             cur.top() != d->xsel_cache_.cursor ||
2075             cur.realAnchor().top() != d->xsel_cache_.anchor)
2076         {
2077                 d->xsel_cache_.cursor = cur.top();
2078                 d->xsel_cache_.anchor = cur.realAnchor().top();
2079                 d->xsel_cache_.set = cur.selection();
2080                 return cur.selectionAsString(false);
2081         }
2082         return docstring();
2083 }
2084
2085
2086 void BufferView::clearSelection()
2087 {
2088         d->cursor_.clearSelection();
2089         // Clear the selection buffer. Otherwise a subsequent
2090         // middle-mouse-button paste would use the selection buffer,
2091         // not the more current external selection.
2092         cap::clearSelection();
2093         d->xsel_cache_.set = false;
2094         // The buffer did not really change, but this causes the
2095         // redraw we need because we cleared the selection above.
2096         buffer_.changed(false);
2097 }
2098
2099
2100 void BufferView::resize(int width, int height)
2101 {
2102         // Update from work area
2103         width_ = width;
2104         height_ = height;
2105
2106         // Clear the paragraph height cache.
2107         d->par_height_.clear();
2108         // Redo the metrics.
2109         updateMetrics();
2110 }
2111
2112
2113 Inset const * BufferView::getCoveringInset(Text const & text,
2114                 int x, int y) const
2115 {
2116         TextMetrics & tm = d->text_metrics_[&text];
2117         Inset * inset = tm.checkInsetHit(x, y);
2118         if (!inset)
2119                 return 0;
2120
2121         if (!inset->descendable(*this))
2122                 // No need to go further down if the inset is not
2123                 // descendable.
2124                 return inset;
2125
2126         size_t cell_number = inset->nargs();
2127         // Check all the inner cell.
2128         for (size_t i = 0; i != cell_number; ++i) {
2129                 Text const * inner_text = inset->getText(i);
2130                 if (inner_text) {
2131                         // Try deeper.
2132                         Inset const * inset_deeper =
2133                                 getCoveringInset(*inner_text, x, y);
2134                         if (inset_deeper)
2135                                 return inset_deeper;
2136                 }
2137         }
2138
2139         return inset;
2140 }
2141
2142
2143 void BufferView::updateHoveredInset() const
2144 {
2145         // Get inset under mouse, if there is one.
2146         int const x = d->mouse_position_cache_.x_;
2147         int const y = d->mouse_position_cache_.y_;
2148         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
2149
2150         d->clickable_inset_ = covering_inset && covering_inset->clickable(*this, x, y);
2151
2152         if (covering_inset == d->last_inset_)
2153                 // Same inset, no need to do anything...
2154                 return;
2155
2156         bool need_redraw = false;
2157         if (d->last_inset_) {
2158                 // Remove the hint on the last hovered inset (if any).
2159                 need_redraw |= d->last_inset_->setMouseHover(this, false);
2160                 d->last_inset_ = 0;
2161         }
2162
2163         if (covering_inset && covering_inset->setMouseHover(this, true)) {
2164                 need_redraw = true;
2165                 // Only the insets that accept the hover state, do
2166                 // clear the last_inset_, so only set the last_inset_
2167                 // member if the hovered setting is accepted.
2168                 d->last_inset_ = covering_inset;
2169         }
2170
2171         if (need_redraw) {
2172                 LYXERR(Debug::PAINTING, "Mouse hover detected at: ("
2173                                 << d->mouse_position_cache_.x_ << ", "
2174                                 << d->mouse_position_cache_.y_ << ")");
2175
2176                 d->update_strategy_ = DecorationUpdate;
2177
2178                 // This event (moving without mouse click) is not passed further.
2179                 // This should be changed if it is further utilized.
2180                 buffer_.changed(false);
2181         }
2182 }
2183
2184
2185 void BufferView::clearLastInset(Inset * inset) const
2186 {
2187         if (d->last_inset_ != inset) {
2188                 LYXERR0("Wrong last_inset!");
2189                 LATTEST(false);
2190         }
2191         d->last_inset_ = 0;
2192 }
2193
2194
2195 void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
2196 {
2197         //lyxerr << "[ cmd0 " << cmd0 << "]" << endl;
2198
2199         // This is only called for mouse related events including
2200         // LFUN_FILE_OPEN generated by drag-and-drop.
2201         FuncRequest cmd = cmd0;
2202
2203         Cursor old = cursor();
2204         Cursor cur(*this);
2205         cur.push(buffer_.inset());
2206         cur.selection(d->cursor_.selection());
2207
2208         // Either the inset under the cursor or the
2209         // surrounding Text will handle this event.
2210
2211         // make sure we stay within the screen...
2212         cmd.set_y(min(max(cmd.y(), -1), height_));
2213
2214         d->mouse_position_cache_.x_ = cmd.x();
2215         d->mouse_position_cache_.y_ = cmd.y();
2216
2217         if (cmd.action() == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
2218                 updateHoveredInset();
2219                 return;
2220         }
2221
2222         // Build temporary cursor.
2223         Inset * inset = d->text_metrics_[&buffer_.text()].editXY(cur, cmd.x(), cmd.y());
2224         if (inset) {
2225                 // If inset is not editable, cur.pos() might point behind the
2226                 // inset (depending on cmd.x(), cmd.y()). This is needed for
2227                 // editing to fix bug 9628, but e.g. the context menu needs a
2228                 // cursor in front of the inset.
2229                 if ((inset->hasSettings() || !inset->contextMenuName().empty()
2230                      || inset->lyxCode() == SEPARATOR_CODE) &&
2231                     cur.nextInset() != inset && cur.prevInset() == inset)
2232                         cur.posBackward();
2233         } else if (cur.inTexted() && cur.pos()
2234                         && cur.paragraph().isEnvSeparator(cur.pos() - 1)) {
2235                 // Always place cursor in front of a separator inset.
2236                 cur.posBackward();
2237         }
2238
2239         // Put anchor at the same position.
2240         cur.resetAnchor();
2241
2242         cur.beginUndoGroup();
2243
2244         // Try to dispatch to an non-editable inset near this position
2245         // via the temp cursor. If the inset wishes to change the real
2246         // cursor it has to do so explicitly by using
2247         //  cur.bv().cursor() = cur;  (or similar)
2248         if (inset)
2249                 inset->dispatch(cur, cmd);
2250
2251         // Now dispatch to the temporary cursor. If the real cursor should
2252         // be modified, the inset's dispatch has to do so explicitly.
2253         if (!inset || !cur.result().dispatched())
2254                 cur.dispatch(cmd);
2255
2256         // Notify left insets
2257         if (cur != old) {
2258                 bool badcursor = old.fixIfBroken() | cur.fixIfBroken();
2259                 badcursor |= notifyCursorLeavesOrEnters(old, cur);
2260                 if (badcursor)
2261                         cursor().fixIfBroken();
2262         }
2263
2264         cur.endUndoGroup();
2265
2266         // Do we have a selection?
2267         theSelection().haveSelection(cursor().selection());
2268
2269         if (cur.needBufferUpdate()) {
2270                 cur.clearBufferUpdate();
2271                 buffer().updateBuffer();
2272         }
2273
2274         // If the command has been dispatched,
2275         if (cur.result().dispatched() || cur.result().screenUpdate())
2276                 processUpdateFlags(cur.result().screenUpdate());
2277 }
2278
2279
2280 int BufferView::minVisiblePart()
2281 {
2282         return 2 * defaultRowHeight();
2283 }
2284
2285
2286 int BufferView::scroll(int y)
2287 {
2288         if (y > 0)
2289                 return scrollDown(y);
2290         if (y < 0)
2291                 return scrollUp(-y);
2292         return 0;
2293 }
2294
2295
2296 int BufferView::scrollDown(int offset)
2297 {
2298         Text * text = &buffer_.text();
2299         TextMetrics & tm = d->text_metrics_[text];
2300         int const ymax = height_ + offset;
2301         while (true) {
2302                 pair<pit_type, ParagraphMetrics const *> last = tm.last();
2303                 int bottom_pos = last.second->position() + last.second->descent();
2304                 if (lyxrc.scroll_below_document)
2305                         bottom_pos += height_ - minVisiblePart();
2306                 if (last.first + 1 == int(text->paragraphs().size())) {
2307                         if (bottom_pos <= height_)
2308                                 return 0;
2309                         offset = min(offset, bottom_pos - height_);
2310                         break;
2311                 }
2312                 if (bottom_pos > ymax)
2313                         break;
2314                 tm.newParMetricsDown();
2315         }
2316         d->anchor_ypos_ -= offset;
2317         return -offset;
2318 }
2319
2320
2321 int BufferView::scrollUp(int offset)
2322 {
2323         Text * text = &buffer_.text();
2324         TextMetrics & tm = d->text_metrics_[text];
2325         int ymin = - offset;
2326         while (true) {
2327                 pair<pit_type, ParagraphMetrics const *> first = tm.first();
2328                 int top_pos = first.second->position() - first.second->ascent();
2329                 if (first.first == 0) {
2330                         if (top_pos >= 0)
2331                                 return 0;
2332                         offset = min(offset, - top_pos);
2333                         break;
2334                 }
2335                 if (top_pos < ymin)
2336                         break;
2337                 tm.newParMetricsUp();
2338         }
2339         d->anchor_ypos_ += offset;
2340         return offset;
2341 }
2342
2343
2344 bool BufferView::setCursorFromRow(int row)
2345 {
2346         TexRow::TextEntry start, end;
2347         tie(start,end) = buffer_.texrow().getEntriesFromRow(row);
2348         LYXERR(Debug::LATEX,
2349                "setCursorFromRow: for row " << row << ", TexRow has found "
2350                "start (id=" << start.id << ",pos=" << start.pos << "), "
2351                "end (id=" << end.id << ",pos=" << end.pos << ")");
2352         return setCursorFromEntries(start, end);
2353 }
2354
2355
2356 bool BufferView::setCursorFromEntries(TexRow::TextEntry start,
2357                                       TexRow::TextEntry end)
2358 {
2359         DocIterator dit_start, dit_end;
2360         tie(dit_start,dit_end) =
2361                 TexRow::getDocIteratorsFromEntries(start, end, buffer_);
2362         if (!dit_start)
2363                 return false;
2364         // Setting selection start
2365         d->cursor_.clearSelection();
2366         setCursor(dit_start);
2367         // Setting selection end
2368         if (dit_end) {
2369                 d->cursor_.resetAnchor();
2370                 setCursorSelectionTo(dit_end);
2371         }
2372         return true;
2373 }
2374
2375
2376 bool BufferView::setCursorFromInset(Inset const * inset)
2377 {
2378         // are we already there?
2379         if (cursor().nextInset() == inset)
2380                 return true;
2381
2382         // Inset is not at cursor position. Find it in the document.
2383         Cursor cur(*this);
2384         cur.reset();
2385         while (cur && cur.nextInset() != inset)
2386                 cur.forwardInset();
2387
2388         if (cur) {
2389                 setCursor(cur);
2390                 return true;
2391         }
2392         return false;
2393 }
2394
2395
2396 void BufferView::gotoLabel(docstring const & label)
2397 {
2398         ListOfBuffers bufs = buffer().allRelatives();
2399         ListOfBuffers::iterator it = bufs.begin();
2400         for (; it != bufs.end(); ++it) {
2401                 Buffer const * buf = *it;
2402
2403                 // find label
2404                 shared_ptr<Toc> toc = buf->tocBackend().toc("label");
2405                 Toc::const_iterator toc_it = toc->begin();
2406                 Toc::const_iterator end = toc->end();
2407                 for (; toc_it != end; ++toc_it) {
2408                         if (label == toc_it->str()) {
2409                                 lyx::dispatch(toc_it->action());
2410                                 return;
2411                         }
2412                 }
2413         }
2414 }
2415
2416
2417 TextMetrics const & BufferView::textMetrics(Text const * t) const
2418 {
2419         return const_cast<BufferView *>(this)->textMetrics(t);
2420 }
2421
2422
2423 TextMetrics & BufferView::textMetrics(Text const * t)
2424 {
2425         LBUFERR(t);
2426         TextMetricsCache::iterator tmc_it  = d->text_metrics_.find(t);
2427         if (tmc_it == d->text_metrics_.end()) {
2428                 tmc_it = d->text_metrics_.insert(
2429                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
2430         }
2431         return tmc_it->second;
2432 }
2433
2434
2435 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
2436                 pit_type pit) const
2437 {
2438         return textMetrics(t).parMetrics(pit);
2439 }
2440
2441
2442 int BufferView::workHeight() const
2443 {
2444         return height_;
2445 }
2446
2447
2448 void BufferView::setCursor(DocIterator const & dit)
2449 {
2450         d->cursor_.reset();
2451         size_t const n = dit.depth();
2452         for (size_t i = 0; i < n; ++i)
2453                 dit[i].inset().edit(d->cursor_, true);
2454
2455         d->cursor_.setCursor(dit);
2456         d->cursor_.selection(false);
2457         d->cursor_.setCurrentFont();
2458         // FIXME
2459         // It seems on general grounds as if this is probably needed, but
2460         // it is not yet clear.
2461         // See bug #7394 and r38388.
2462         // d->cursor.resetAnchor();
2463 }
2464
2465
2466 void BufferView::setCursorSelectionTo(DocIterator const & dit)
2467 {
2468         size_t const n = dit.depth();
2469         for (size_t i = 0; i < n; ++i)
2470                 dit[i].inset().edit(d->cursor_, true);
2471
2472         d->cursor_.selection(true);
2473         d->cursor_.setCursorSelectionTo(dit);
2474         d->cursor_.setCurrentFont();
2475 }
2476
2477
2478 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
2479 {
2480         // Would be wrong to delete anything if we have a selection.
2481         if (cur.selection())
2482                 return false;
2483
2484         bool need_anchor_change = false;
2485         bool changed = d->cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
2486                 need_anchor_change);
2487
2488         if (need_anchor_change)
2489                 cur.resetAnchor();
2490
2491         if (!changed)
2492                 return false;
2493
2494         d->cursor_ = cur;
2495
2496         // we would rather not do this here, but it needs to be done before
2497         // the changed() signal is sent.
2498         buffer_.updateBuffer();
2499
2500         buffer_.changed(true);
2501         return true;
2502 }
2503
2504
2505 bool BufferView::mouseSetCursor(Cursor & cur, bool const select)
2506 {
2507         LASSERT(&cur.bv() == this, return false);
2508
2509         if (!select)
2510                 // this event will clear selection so we save selection for
2511                 // persistent selection
2512                 cap::saveSelection(cursor());
2513
2514         d->cursor_.macroModeClose();
2515         // If a macro has been finalized, the cursor might have been broken
2516         cur.fixIfBroken();
2517
2518         // Has the cursor just left the inset?
2519         bool const leftinset = (&d->cursor_.inset() != &cur.inset());
2520         if (leftinset)
2521                 d->cursor_.fixIfBroken();
2522
2523         // do the dEPM magic if needed
2524         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
2525         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
2526         // the leftinset bool would not be necessary (badcursor instead).
2527         bool update = leftinset;
2528
2529         if (select) {
2530                 d->cursor_.setSelection();
2531                 d->cursor_.setCursorSelectionTo(cur);
2532         } else {
2533                 if (d->cursor_.inTexted())
2534                         update |= checkDepm(cur, d->cursor_);
2535                 d->cursor_.resetAnchor();
2536                 d->cursor_.setCursor(cur);
2537                 d->cursor_.clearSelection();
2538         }
2539         d->cursor_.boundary(cur.boundary());
2540         d->cursor_.finishUndo();
2541         d->cursor_.setCurrentFont();
2542         if (update)
2543                 cur.forceBufferUpdate();
2544         return update;
2545 }
2546
2547
2548 void BufferView::putSelectionAt(DocIterator const & cur,
2549                                 int length, bool backwards)
2550 {
2551         d->cursor_.clearSelection();
2552
2553         setCursor(cur);
2554
2555         if (length) {
2556                 if (backwards) {
2557                         d->cursor_.pos() += length;
2558                         d->cursor_.setSelection(d->cursor_, -length);
2559                 } else
2560                         d->cursor_.setSelection(d->cursor_, length);
2561         }
2562 }
2563
2564
2565 bool BufferView::selectIfEmpty(DocIterator & cur)
2566 {
2567         if ((cur.inTexted() && !cur.paragraph().empty())
2568             || (cur.inMathed() && !cur.cell().empty()))
2569                 return false;
2570
2571         pit_type const beg_pit = cur.pit();
2572         if (beg_pit > 0) {
2573                 // The paragraph associated to this item isn't
2574                 // the first one, so it can be selected
2575                 cur.backwardPos();
2576         } else {
2577                 // We have to resort to select the space between the
2578                 // end of this item and the begin of the next one
2579                 cur.forwardPos();
2580         }
2581         if (cur.empty()) {
2582                 // If it is the only item in the document,
2583                 // nothing can be selected
2584                 return false;
2585         }
2586         pit_type const end_pit = cur.pit();
2587         pos_type const end_pos = cur.pos();
2588         d->cursor_.clearSelection();
2589         d->cursor_.reset();
2590         d->cursor_.setCursor(cur);
2591         d->cursor_.pit() = beg_pit;
2592         d->cursor_.pos() = 0;
2593         d->cursor_.selection(false);
2594         d->cursor_.resetAnchor();
2595         d->cursor_.pit() = end_pit;
2596         d->cursor_.pos() = end_pos;
2597         d->cursor_.setSelection();
2598         return true;
2599 }
2600
2601
2602 Cursor & BufferView::cursor()
2603 {
2604         return d->cursor_;
2605 }
2606
2607
2608 Cursor const & BufferView::cursor() const
2609 {
2610         return d->cursor_;
2611 }
2612
2613
2614 bool BufferView::singleParUpdate()
2615 {
2616         Text & buftext = buffer_.text();
2617         pit_type const bottom_pit = d->cursor_.bottom().pit();
2618         TextMetrics & tm = textMetrics(&buftext);
2619         int old_height = tm.parMetrics(bottom_pit).height();
2620
2621         // make sure inline completion pointer is ok
2622         if (d->inlineCompletionPos_.fixIfBroken())
2623                 d->inlineCompletionPos_ = DocIterator();
2624
2625         // In Single Paragraph mode, rebreak only
2626         // the (main text, not inset!) paragraph containing the cursor.
2627         // (if this paragraph contains insets etc., rebreaking will
2628         // recursively descend)
2629         tm.redoParagraph(bottom_pit);
2630         ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
2631         if (pm.height() != old_height)
2632                 // Paragraph height has changed so we cannot proceed to
2633                 // the singlePar optimisation.
2634                 return false;
2635
2636         tm.updatePosCache(bottom_pit);
2637
2638         LYXERR(Debug::PAINTING, "\ny1: " << pm.position() - pm.ascent()
2639                 << " y2: " << pm.position() + pm.descent()
2640                 << " pit: " << bottom_pit
2641                 << " singlepar: 1");
2642         return true;
2643 }
2644
2645
2646 void BufferView::updateMetrics()
2647 {
2648         updateMetrics(d->update_flags_);
2649         d->update_strategy_ = FullScreenUpdate;
2650 }
2651
2652
2653 void BufferView::updateMetrics(Update::flags & update_flags)
2654 {
2655         if (height_ == 0 || width_ == 0)
2656                 return;
2657
2658         Text & buftext = buffer_.text();
2659         pit_type const npit = int(buftext.paragraphs().size());
2660
2661         // Clear out the position cache in case of full screen redraw,
2662         d->coord_cache_.clear();
2663
2664         // Clear out paragraph metrics to avoid having invalid metrics
2665         // in the cache from paragraphs not relayouted below
2666         // The complete text metrics will be redone.
2667         d->text_metrics_.clear();
2668
2669         TextMetrics & tm = textMetrics(&buftext);
2670
2671         // make sure inline completion pointer is ok
2672         if (d->inlineCompletionPos_.fixIfBroken())
2673                 d->inlineCompletionPos_ = DocIterator();
2674
2675         if (d->anchor_pit_ >= npit)
2676                 // The anchor pit must have been deleted...
2677                 d->anchor_pit_ = npit - 1;
2678
2679         // Rebreak anchor paragraph.
2680         tm.redoParagraph(d->anchor_pit_);
2681         ParagraphMetrics & anchor_pm = tm.par_metrics_[d->anchor_pit_];
2682
2683         // position anchor
2684         if (d->anchor_pit_ == 0) {
2685                 int scrollRange = d->scrollbarParameters_.max - d->scrollbarParameters_.min;
2686
2687                 // Complete buffer visible? Then it's easy.
2688                 if (scrollRange == 0)
2689                         d->anchor_ypos_ = anchor_pm.ascent();
2690                 else {
2691                         // avoid empty space above the first row
2692                         d->anchor_ypos_ = min(d->anchor_ypos_, anchor_pm.ascent());
2693                 }
2694         }
2695         anchor_pm.setPosition(d->anchor_ypos_);
2696         tm.updatePosCache(d->anchor_pit_);
2697
2698         LYXERR(Debug::PAINTING, "metrics: "
2699                 << " anchor pit = " << d->anchor_pit_
2700                 << " anchor ypos = " << d->anchor_ypos_);
2701
2702         // Redo paragraphs above anchor if necessary.
2703         int y1 = d->anchor_ypos_ - anchor_pm.ascent();
2704         // We are now just above the anchor paragraph.
2705         pit_type pit1 = d->anchor_pit_ - 1;
2706         for (; pit1 >= 0 && y1 >= 0; --pit1) {
2707                 tm.redoParagraph(pit1);
2708                 ParagraphMetrics & pm = tm.par_metrics_[pit1];
2709                 y1 -= pm.descent();
2710                 // Save the paragraph position in the cache.
2711                 pm.setPosition(y1);
2712                 tm.updatePosCache(pit1);
2713                 y1 -= pm.ascent();
2714         }
2715
2716         // Redo paragraphs below the anchor if necessary.
2717         int y2 = d->anchor_ypos_ + anchor_pm.descent();
2718         // We are now just below the anchor paragraph.
2719         pit_type pit2 = d->anchor_pit_ + 1;
2720         for (; pit2 < npit && y2 <= height_; ++pit2) {
2721                 tm.redoParagraph(pit2);
2722                 ParagraphMetrics & pm = tm.par_metrics_[pit2];
2723                 y2 += pm.ascent();
2724                 // Save the paragraph position in the cache.
2725                 pm.setPosition(y2);
2726                 tm.updatePosCache(pit2);
2727                 y2 += pm.descent();
2728         }
2729
2730         LYXERR(Debug::PAINTING, "Metrics: "
2731                 << " anchor pit = " << d->anchor_pit_
2732                 << " anchor ypos = " << d->anchor_ypos_
2733                 << " y1 = " << y1
2734                 << " y2 = " << y2
2735                 << " pit1 = " << pit1
2736                 << " pit2 = " << pit2);
2737
2738         // metrics is done, full drawing is necessary now
2739         update_flags = (update_flags & ~Update::Force) | Update::ForceDraw;
2740
2741         // Now update the positions of insets in the cache.
2742         updatePosCache();
2743
2744         if (lyxerr.debugging(Debug::WORKAREA)) {
2745                 LYXERR(Debug::WORKAREA, "BufferView::updateMetrics");
2746                 d->coord_cache_.dump();
2747         }
2748 }
2749
2750
2751 void BufferView::updatePosCache()
2752 {
2753         // this is the "nodraw" drawing stage: only set the positions of the
2754         // insets in metrics cache.
2755         frontend::NullPainter np;
2756         draw(np, false);
2757 }
2758
2759
2760 void BufferView::insertLyXFile(FileName const & fname)
2761 {
2762         LASSERT(d->cursor_.inTexted(), return);
2763
2764         // Get absolute path of file and add ".lyx"
2765         // to the filename if necessary
2766         FileName filename = fileSearch(string(), fname.absFileName(), "lyx");
2767
2768         docstring const disp_fn = makeDisplayPath(filename.absFileName());
2769         // emit message signal.
2770         message(bformat(_("Inserting document %1$s..."), disp_fn));
2771
2772         docstring res;
2773         Buffer buf(filename.absFileName(), false);
2774         if (buf.loadLyXFile() == Buffer::ReadSuccess) {
2775                 ErrorList & el = buffer_.errorList("Parse");
2776                 // Copy the inserted document error list into the current buffer one.
2777                 el = buf.errorList("Parse");
2778                 buffer_.undo().recordUndo(d->cursor_);
2779                 cap::pasteParagraphList(d->cursor_, buf.paragraphs(),
2780                                              buf.params().documentClassPtr(), el);
2781                 res = _("Document %1$s inserted.");
2782         } else {
2783                 res = _("Could not insert document %1$s");
2784         }
2785
2786         buffer_.changed(true);
2787         // emit message signal.
2788         message(bformat(res, disp_fn));
2789 }
2790
2791
2792 Point BufferView::coordOffset(DocIterator const & dit) const
2793 {
2794         int x = 0;
2795         int y = 0;
2796         int lastw = 0;
2797
2798         // Addup contribution of nested insets, from inside to outside,
2799         // keeping the outer paragraph for a special handling below
2800         for (size_t i = dit.depth() - 1; i >= 1; --i) {
2801                 CursorSlice const & sl = dit[i];
2802                 int xx = 0;
2803                 int yy = 0;
2804
2805                 // get relative position inside sl.inset()
2806                 sl.inset().cursorPos(*this, sl, dit.boundary() && (i + 1 == dit.depth()), xx, yy);
2807
2808                 // Make relative position inside of the edited inset relative to sl.inset()
2809                 x += xx;
2810                 y += yy;
2811
2812                 // In case of an RTL inset, the edited inset will be positioned to the left
2813                 // of xx:yy
2814                 if (sl.text()) {
2815                         bool boundary_i = dit.boundary() && i + 1 == dit.depth();
2816                         bool rtl = textMetrics(sl.text()).isRTL(sl, boundary_i);
2817                         if (rtl)
2818                                 x -= lastw;
2819                 }
2820
2821                 // remember width for the case that sl.inset() is positioned in an RTL inset
2822                 lastw = sl.inset().dimension(*this).wid;
2823
2824                 //lyxerr << "Cursor::getPos, i: "
2825                 // << i << " x: " << xx << " y: " << y << endl;
2826         }
2827
2828         // Add contribution of initial rows of outermost paragraph
2829         CursorSlice const & sl = dit[0];
2830         TextMetrics const & tm = textMetrics(sl.text());
2831         ParagraphMetrics const & pm = tm.parMetrics(sl.pit());
2832
2833         LBUFERR(!pm.rows().empty());
2834         y -= pm.rows()[0].ascent();
2835 #if 1
2836         // FIXME: document this mess
2837         size_t rend;
2838         if (sl.pos() > 0 && dit.depth() == 1) {
2839                 int pos = sl.pos();
2840                 if (pos && dit.boundary())
2841                         --pos;
2842 //              lyxerr << "coordOffset: boundary:" << dit.boundary() << " depth:" << dit.depth() << " pos:" << pos << " sl.pos:" << sl.pos() << endl;
2843                 rend = pm.pos2row(pos);
2844         } else
2845                 rend = pm.pos2row(sl.pos());
2846 #else
2847         size_t rend = pm.pos2row(sl.pos());
2848 #endif
2849         for (size_t rit = 0; rit != rend; ++rit)
2850                 y += pm.rows()[rit].height();
2851         y += pm.rows()[rend].ascent();
2852
2853         TextMetrics const & bottom_tm = textMetrics(dit.bottom().text());
2854
2855         // Make relative position from the nested inset now bufferview absolute.
2856         int xx = bottom_tm.cursorX(dit.bottom(), dit.boundary() && dit.depth() == 1);
2857         x += xx;
2858
2859         // In the RTL case place the nested inset at the left of the cursor in
2860         // the outer paragraph
2861         bool boundary_1 = dit.boundary() && 1 == dit.depth();
2862         bool rtl = bottom_tm.isRTL(dit.bottom(), boundary_1);
2863         if (rtl)
2864                 x -= lastw;
2865
2866         return Point(x, y);
2867 }
2868
2869
2870 Point BufferView::getPos(DocIterator const & dit) const
2871 {
2872         if (!paragraphVisible(dit))
2873                 return Point(-1, -1);
2874
2875         CursorSlice const & bot = dit.bottom();
2876         TextMetrics const & tm = textMetrics(bot.text());
2877
2878         // offset from outer paragraph
2879         Point p = coordOffset(dit);
2880         p.y_ += tm.parMetrics(bot.pit()).position();
2881         return p;
2882 }
2883
2884
2885 bool BufferView::paragraphVisible(DocIterator const & dit) const
2886 {
2887         CursorSlice const & bot = dit.bottom();
2888         TextMetrics const & tm = textMetrics(bot.text());
2889
2890         return tm.contains(bot.pit());
2891 }
2892
2893
2894 void BufferView::caretPosAndHeight(Point & p, int & h) const
2895 {
2896         Cursor const & cur = cursor();
2897         Font const font = cur.real_current_font;
2898         frontend::FontMetrics const & fm = theFontMetrics(font);
2899         int const asc = fm.maxAscent();
2900         int const des = fm.maxDescent();
2901         h = asc + des;
2902         p = getPos(cur);
2903         p.y_ -= asc;
2904 }
2905
2906
2907 bool BufferView::cursorInView(Point const & p, int h) const
2908 {
2909         Cursor const & cur = cursor();
2910         // does the cursor touch the screen ?
2911         if (p.y_ + h < 0 || p.y_ >= workHeight() || !paragraphVisible(cur))
2912                 return false;
2913         return true;
2914 }
2915
2916
2917 int BufferView::horizScrollOffset() const
2918 {
2919         return d->horiz_scroll_offset_;
2920 }
2921
2922
2923 int BufferView::horizScrollOffset(Text const * text,
2924                                   pit_type pit, pos_type pos) const
2925 {
2926         // Is this a row that is currently scrolled?
2927         if (!d->current_row_slice_.empty()
2928             && &text->inset() == d->current_row_slice_.inset().asInsetText()
2929             && pit ==  d->current_row_slice_.pit()
2930             && pos ==  d->current_row_slice_.pos())
2931                 return d->horiz_scroll_offset_;
2932         return 0;
2933 }
2934
2935
2936 bool BufferView::hadHorizScrollOffset(Text const * text,
2937                                       pit_type pit, pos_type pos) const
2938 {
2939         return !d->last_row_slice_.empty()
2940                && &text->inset() == d->last_row_slice_.inset().asInsetText()
2941                && pit ==  d->last_row_slice_.pit()
2942                && pos ==  d->last_row_slice_.pos();
2943 }
2944
2945
2946 void BufferView::setCurrentRowSlice(CursorSlice const & rowSlice)
2947 {
2948         // nothing to do if the cursor was already on this row
2949         if (d->current_row_slice_ == rowSlice) {
2950                 d->last_row_slice_ = CursorSlice();
2951                 return;
2952         }
2953
2954         // if the (previous) current row was scrolled, we have to
2955         // remember it in order to repaint it next time.
2956         if (d->horiz_scroll_offset_ != 0)
2957                 d->last_row_slice_ = d->current_row_slice_;
2958         else
2959                 d->last_row_slice_ = CursorSlice();
2960
2961         // Since we changed row, the scroll offset is not valid anymore
2962         d->horiz_scroll_offset_ = 0;
2963         d->current_row_slice_ = rowSlice;
2964 }
2965
2966
2967 namespace {
2968
2969 bool sliceInRow(CursorSlice const & cs, Text const * text, Row const & row)
2970 {
2971         /* The normal case is the last line. The previous line takes care
2972          * of empty rows (e.g. empty paragraphs). Cursor boundary issues
2973          * are taken care of when setting caret_slice_ in
2974          * BufferView::draw.
2975          */
2976         return !cs.empty() && cs.text() == text && cs.pit() == row.pit()
2977                && ((row.pos() == row.endpos() && row.pos() == cs.pos())
2978                   || (row.pos() <= cs.pos() && cs.pos() < row.endpos()));
2979 }
2980
2981 }
2982
2983
2984 bool BufferView::needRepaint(Text const * text, Row const & row) const
2985 {
2986         return d->repaint_caret_row_ && sliceInRow(d->caret_slice_, text, row);
2987 }
2988
2989
2990 void BufferView::checkCursorScrollOffset()
2991 {
2992         CursorSlice rowSlice = d->cursor_.bottom();
2993         TextMetrics const & tm = textMetrics(rowSlice.text());
2994
2995         // Stop if metrics have not been computed yet, since it means
2996         // that there is nothing to do.
2997         if (!tm.contains(rowSlice.pit()))
2998                 return;
2999         ParagraphMetrics const & pm = tm.parMetrics(rowSlice.pit());
3000         Row const & row = pm.getRow(rowSlice.pos(),
3001                                     d->cursor_.boundary() && rowSlice == d->cursor_.top());
3002         rowSlice.pos() = row.pos();
3003
3004         // Set the row on which the cursor lives.
3005         setCurrentRowSlice(rowSlice);
3006
3007         // Current x position of the cursor in pixels
3008         int cur_x = getPos(d->cursor_).x_;
3009
3010         // Horizontal scroll offset of the cursor row in pixels
3011         int offset = d->horiz_scroll_offset_;
3012         int const MARGIN = 2 * theFontMetrics(d->cursor_.real_current_font).em()
3013                            + row.right_margin;
3014         if (row.right_x() <= workWidth() - row.right_margin) {
3015                 // Row is narrower than the work area, no offset needed.
3016                 offset = 0;
3017         } else {
3018                 if (cur_x - offset < MARGIN) {
3019                         // cursor would be too far right
3020                         offset = cur_x - MARGIN;
3021                 } else if (cur_x - offset > workWidth() - MARGIN) {
3022                         // cursor would be too far left
3023                         offset = cur_x - workWidth() + MARGIN;
3024                 }
3025                 // Correct the offset to make sure that we do not scroll too much
3026                 if (offset < 0)
3027                         offset = 0;
3028                 if (row.right_x() - offset < workWidth() - row.right_margin)
3029                         offset = row.right_x() - workWidth() + row.right_margin;
3030         }
3031
3032         //lyxerr << "cur_x=" << cur_x << ", offset=" << offset << ", row.wid=" << row.width() << ", margin=" << MARGIN << endl;
3033
3034         if (offset != d->horiz_scroll_offset_)
3035                 LYXERR(Debug::PAINTING, "Horiz. scroll offset changed from "
3036                        << d->horiz_scroll_offset_ << " to " << offset);
3037
3038         if (d->update_strategy_ == NoScreenUpdate
3039             && (offset != d->horiz_scroll_offset_
3040                 || !d->last_row_slice_.empty())) {
3041                 // FIXME: if one uses SingleParUpdate, then home/end
3042                 // will not work on long rows. Why?
3043                 d->update_strategy_ = FullScreenUpdate;
3044         }
3045
3046         d->horiz_scroll_offset_ = offset;
3047 }
3048
3049
3050 void BufferView::draw(frontend::Painter & pain, bool paint_caret)
3051 {
3052         if (height_ == 0 || width_ == 0)
3053                 return;
3054         LYXERR(Debug::PAINTING, (pain.isNull() ? "\t\t--- START NODRAW ---"
3055                                  : "\t\t*** START DRAWING ***"));
3056         Text & text = buffer_.text();
3057         TextMetrics const & tm = d->text_metrics_[&text];
3058         int const y = tm.first().second->position();
3059         PainterInfo pi(this, pain);
3060
3061         /**  A repaint of the previous caret row is needed if there is
3062          *  caret painted on screen and either
3063          *   1/ a new caret has to be painted at a place different from
3064          *      the existing one;
3065          *   2/ there is no need for a caret anymore.
3066          */
3067         d->repaint_caret_row_ = !d->caret_slice_.empty() &&
3068                 ((paint_caret && d->cursor_.top() != d->caret_slice_)
3069                  || ! paint_caret);
3070
3071         // Check whether the row where the cursor lives needs to be scrolled.
3072         // Update the drawing strategy if needed.
3073         checkCursorScrollOffset();
3074
3075         switch (d->update_strategy_) {
3076
3077         case NoScreenUpdate:
3078                 // no screen painting is actually needed. In nodraw stage
3079                 // however, the different coordinates of insets and paragraphs
3080                 // needs to be updated.
3081                 LYXERR(Debug::PAINTING, "Strategy: NoScreenUpdate");
3082                 pi.full_repaint = false;
3083                 if (pain.isNull()) {
3084                         pi.full_repaint = true;
3085                         tm.draw(pi, 0, y);
3086                 } else if (d->repaint_caret_row_) {
3087                         pi.full_repaint = false;
3088                         tm.draw(pi, 0, y);
3089                 }
3090                 break;
3091
3092         case SingleParUpdate:
3093                 pi.full_repaint = false;
3094                 LYXERR(Debug::PAINTING, "Strategy: SingleParUpdate");
3095                 // In general, only the current row of the outermost paragraph
3096                 // will be redrawn. Particular cases where selection spans
3097                 // multiple paragraph are correctly detected in TextMetrics.
3098                 tm.draw(pi, 0, y);
3099                 break;
3100
3101         case DecorationUpdate:
3102                 // FIXME: We should also distinguish DecorationUpdate to avoid text
3103                 // drawing if possible. This is not possible to do easily right now
3104                 // because of the single backing pixmap.
3105
3106         case FullScreenUpdate:
3107
3108                 LYXERR(Debug::PAINTING,
3109                        ((d->update_strategy_ == FullScreenUpdate)
3110                         ? "Strategy: FullScreenUpdate"
3111                         : "Strategy: DecorationUpdate"));
3112
3113                 // The whole screen, including insets, will be refreshed.
3114                 pi.full_repaint = true;
3115
3116                 // Clear background.
3117                 pain.fillRectangle(0, 0, width_, height_,
3118                         pi.backgroundColor(&buffer_.inset()));
3119
3120                 // Draw everything.
3121                 tm.draw(pi, 0, y);
3122
3123                 // and possibly grey out below
3124                 pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
3125                 int const y2 = lastpm.second->position() + lastpm.second->descent();
3126
3127                 if (y2 < height_) {
3128                         Color color = buffer().isInternal()
3129                                 ? Color_background : Color_bottomarea;
3130                         pain.fillRectangle(0, y2, width_, height_ - y2, color);
3131                 }
3132                 break;
3133         }
3134         LYXERR(Debug::PAINTING, (pain.isNull() ? "\t\t --- END NODRAW ---"
3135                                 : "\t\t *** END DRAWING ***"));
3136
3137         // The scrollbar needs an update.
3138         updateScrollbar();
3139
3140         // Normalize anchor for next time
3141         pair<pit_type, ParagraphMetrics const *> firstpm = tm.first();
3142         pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
3143         for (pit_type pit = firstpm.first; pit <= lastpm.first; ++pit) {
3144                 ParagraphMetrics const & pm = tm.parMetrics(pit);
3145                 if (pm.position() + pm.descent() > 0) {
3146                         if (d->anchor_pit_ != pit
3147                             || d->anchor_ypos_ != pm.position())
3148                                 LYXERR(Debug::PAINTING, "Found new anchor pit = " << d->anchor_pit_
3149                                        << "  anchor ypos = " << d->anchor_ypos_);
3150                         d->anchor_pit_ = pit;
3151                         d->anchor_ypos_ = pm.position();
3152                         break;
3153                 }
3154         }
3155         if (!pain.isNull()) {
3156                 // reset the update flags, everything has been done
3157                 d->update_flags_ = Update::None;
3158         }
3159
3160         // Remember what has just been done for the next draw() step
3161         if (paint_caret) {
3162                 d->caret_slice_ = d->cursor_.top();
3163                 if (d->caret_slice_.pos() > 0
3164                     && (d->cursor_.boundary()
3165                         || d->caret_slice_.pos() == d->caret_slice_.lastpos()))
3166                         --d->caret_slice_.pos();
3167         } else
3168                 d->caret_slice_ = CursorSlice();
3169 }
3170
3171
3172 void BufferView::message(docstring const & msg)
3173 {
3174         if (d->gui_)
3175                 d->gui_->message(msg);
3176 }
3177
3178
3179 void BufferView::showDialog(string const & name)
3180 {
3181         if (d->gui_)
3182                 d->gui_->showDialog(name, string());
3183 }
3184
3185
3186 void BufferView::showDialog(string const & name,
3187         string const & data, Inset * inset)
3188 {
3189         if (d->gui_)
3190                 d->gui_->showDialog(name, data, inset);
3191 }
3192
3193
3194 void BufferView::updateDialog(string const & name, string const & data)
3195 {
3196         if (d->gui_)
3197                 d->gui_->updateDialog(name, data);
3198 }
3199
3200
3201 void BufferView::setGuiDelegate(frontend::GuiBufferViewDelegate * gui)
3202 {
3203         d->gui_ = gui;
3204 }
3205
3206
3207 // FIXME: Move this out of BufferView again
3208 docstring BufferView::contentsOfPlaintextFile(FileName const & fname)
3209 {
3210         if (!fname.isReadableFile()) {
3211                 docstring const error = from_ascii(strerror(errno));
3212                 docstring const file = makeDisplayPath(fname.absFileName(), 50);
3213                 docstring const text =
3214                   bformat(_("Could not read the specified document\n"
3215                             "%1$s\ndue to the error: %2$s"), file, error);
3216                 Alert::error(_("Could not read file"), text);
3217                 return docstring();
3218         }
3219
3220         if (!fname.isReadableFile()) {
3221                 docstring const file = makeDisplayPath(fname.absFileName(), 50);
3222                 docstring const text =
3223                   bformat(_("%1$s\n is not readable."), file);
3224                 Alert::error(_("Could not open file"), text);
3225                 return docstring();
3226         }
3227
3228         // FIXME UNICODE: We don't know the encoding of the file
3229         docstring file_content = fname.fileContents("UTF-8");
3230         if (file_content.empty()) {
3231                 Alert::error(_("Reading not UTF-8 encoded file"),
3232                              _("The file is not UTF-8 encoded.\n"
3233                                "It will be read as local 8Bit-encoded.\n"
3234                                "If this does not give the correct result\n"
3235                                "then please change the encoding of the file\n"
3236                                "to UTF-8 with a program other than LyX.\n"));
3237                 file_content = fname.fileContents("local8bit");
3238         }
3239
3240         return normalize_c(file_content);
3241 }
3242
3243
3244 void BufferView::insertPlaintextFile(FileName const & f, bool asParagraph)
3245 {
3246         docstring const tmpstr = contentsOfPlaintextFile(f);
3247
3248         if (tmpstr.empty())
3249                 return;
3250
3251         Cursor & cur = cursor();
3252         cap::replaceSelection(cur);
3253         buffer_.undo().recordUndo(cur);
3254         if (asParagraph)
3255                 cur.innerText()->insertStringAsParagraphs(cur, tmpstr, cur.current_font);
3256         else
3257                 cur.innerText()->insertStringAsLines(cur, tmpstr, cur.current_font);
3258
3259         buffer_.changed(true);
3260 }
3261
3262
3263 docstring const & BufferView::inlineCompletion() const
3264 {
3265         return d->inlineCompletion_;
3266 }
3267
3268
3269 size_t const & BufferView::inlineCompletionUniqueChars() const
3270 {
3271         return d->inlineCompletionUniqueChars_;
3272 }
3273
3274
3275 DocIterator const & BufferView::inlineCompletionPos() const
3276 {
3277         return d->inlineCompletionPos_;
3278 }
3279
3280
3281 void BufferView::resetInlineCompletionPos()
3282 {
3283         d->inlineCompletionPos_ = DocIterator();
3284 }
3285
3286
3287 bool samePar(DocIterator const & a, DocIterator const & b)
3288 {
3289         if (a.empty() && b.empty())
3290                 return true;
3291         if (a.empty() || b.empty())
3292                 return false;
3293         if (a.depth() != b.depth())
3294                 return false;
3295         return &a.innerParagraph() == &b.innerParagraph();
3296 }
3297
3298
3299 void BufferView::setInlineCompletion(Cursor const & cur, DocIterator const & pos,
3300         docstring const & completion, size_t uniqueChars)
3301 {
3302         uniqueChars = min(completion.size(), uniqueChars);
3303         bool changed = d->inlineCompletion_ != completion
3304                 || d->inlineCompletionUniqueChars_ != uniqueChars;
3305         bool singlePar = true;
3306         d->inlineCompletion_ = completion;
3307         d->inlineCompletionUniqueChars_ = min(completion.size(), uniqueChars);
3308
3309         //lyxerr << "setInlineCompletion pos=" << pos << " completion=" << completion << " uniqueChars=" << uniqueChars << std::endl;
3310
3311         // at new position?
3312         DocIterator const & old = d->inlineCompletionPos_;
3313         if (old != pos) {
3314                 //lyxerr << "inlineCompletionPos changed" << std::endl;
3315                 // old or pos are in another paragraph?
3316                 if ((!samePar(cur, pos) && !pos.empty())
3317                     || (!samePar(cur, old) && !old.empty())) {
3318                         singlePar = false;
3319                         //lyxerr << "different paragraph" << std::endl;
3320                 }
3321                 d->inlineCompletionPos_ = pos;
3322         }
3323
3324         // set update flags
3325         if (changed) {
3326                 if (singlePar && !(cur.result().screenUpdate() & Update::Force))
3327                         cur.screenUpdateFlags(cur.result().screenUpdate() | Update::SinglePar);
3328                 else
3329                         cur.screenUpdateFlags(cur.result().screenUpdate() | Update::Force);
3330         }
3331 }
3332
3333
3334 bool BufferView::clickableInset() const
3335 {
3336         return d->clickable_inset_;
3337 }
3338
3339 } // namespace lyx