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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 #include "mathed/InsetMathNest.h"
69
70 #include "frontends/alert.h"
71 #include "frontends/Application.h"
72 #include "frontends/Delegates.h"
73 #include "frontends/FontMetrics.h"
74 #include "frontends/NullPainter.h"
75 #include "frontends/Painter.h"
76 #include "frontends/Selection.h"
77
78 #include "support/convert.h"
79 #include "support/debug.h"
80 #include "support/ExceptionMessage.h"
81 #include "support/filetools.h"
82 #include "support/gettext.h"
83 #include "support/lassert.h"
84 #include "support/lstrings.h"
85 #include "support/lyxlib.h"
86 #include "support/Package.h"
87 #include "support/types.h"
88
89 #include <cerrno>
90 #include <fstream>
91 #include <functional>
92 #include <iterator>
93 #include <sstream>
94 #include <vector>
95
96 using namespace std;
97 using namespace lyx::support;
98
99 namespace lyx {
100
101 namespace Alert = frontend::Alert;
102
103 namespace {
104
105 /// Return an inset of this class if it exists at the current cursor position
106 template <class T>
107 T * getInsetByCode(Cursor const & cur, InsetCode code)
108 {
109         DocIterator it = cur;
110         Inset * inset = it.nextInset();
111         if (inset && inset->lyxCode() == code)
112                 return static_cast<T*>(inset);
113         return 0;
114 }
115
116
117 /// Note that comparing contents can only be used for InsetCommand
118 bool findNextInset(DocIterator & dit, vector<InsetCode> const & codes,
119         docstring const & contents)
120 {
121         DocIterator tmpdit = dit;
122
123         while (tmpdit) {
124                 Inset const * inset = tmpdit.nextInset();
125                 if (inset) {
126                         bool const valid_code = std::find(codes.begin(), codes.end(),
127                                 inset->lyxCode()) != codes.end();
128                         InsetCommand const * ic = inset->asInsetCommand();
129                         bool const same_or_no_contents =  contents.empty()
130                                 || (ic && (ic->getFirstNonOptParam() == contents));
131
132                         if (valid_code && same_or_no_contents) {
133                                 dit = tmpdit;
134                                 return true;
135                         }
136                 }
137                 tmpdit.forwardInset();
138         }
139
140         return false;
141 }
142
143
144 /// Looks for next inset with one of the given codes.
145 /// Note that same_content can only be used for InsetCommand
146 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
147         bool same_content)
148 {
149         docstring contents;
150         DocIterator tmpdit = dit;
151         tmpdit.forwardInset();
152         if (!tmpdit)
153                 return false;
154
155         Inset const * inset = tmpdit.nextInset();
156         if (same_content && inset) {
157                 InsetCommand const * ic = inset->asInsetCommand();
158                 if (ic) {
159                         bool const valid_code = std::find(codes.begin(), codes.end(),
160                                 ic->lyxCode()) != codes.end();
161                         if (valid_code)
162                                 contents = ic->getFirstNonOptParam();
163                 }
164         }
165
166         if (!findNextInset(tmpdit, codes, contents)) {
167                 if (dit.depth() != 1 || dit.pit() != 0 || dit.pos() != 0) {
168                         inset = &tmpdit.bottom().inset();
169                         tmpdit = doc_iterator_begin(&inset->buffer(), inset);
170                         if (!findNextInset(tmpdit, codes, contents))
171                                 return false;
172                 } else {
173                         return false;
174                 }
175         }
176
177         dit = tmpdit;
178         return true;
179 }
180
181
182 /// Looks for next inset with the given code
183 void findInset(DocIterator & dit, InsetCode code, bool same_content)
184 {
185         findInset(dit, vector<InsetCode>(1, code), same_content);
186 }
187
188
189 /// Moves cursor to the next inset with one of the given codes.
190 void gotoInset(BufferView * bv, vector<InsetCode> const & codes,
191                bool same_content)
192 {
193         Cursor tmpcur = bv->cursor();
194         if (!findInset(tmpcur, codes, same_content)) {
195                 bv->cursor().message(_("No more insets"));
196                 return;
197         }
198
199         tmpcur.clearSelection();
200         bv->setCursor(tmpcur);
201         bv->showCursor();
202 }
203
204
205 /// Moves cursor to the next inset with given code.
206 void gotoInset(BufferView * bv, InsetCode code, bool same_content)
207 {
208         gotoInset(bv, vector<InsetCode>(1, code), same_content);
209 }
210
211
212 /// A map from a Text to the associated text metrics
213 typedef map<Text const *, TextMetrics> TextMetricsCache;
214
215 enum ScreenUpdateStrategy {
216         NoScreenUpdate,
217         SingleParUpdate,
218         FullScreenUpdate,
219         DecorationUpdate
220 };
221
222 } // namespace
223
224
225 /////////////////////////////////////////////////////////////////////
226 //
227 // BufferView
228 //
229 /////////////////////////////////////////////////////////////////////
230
231 struct BufferView::Private
232 {
233         Private(BufferView & bv) :
234                 update_strategy_(FullScreenUpdate),
235                 update_flags_(Update::Force),
236                 wh_(0), cursor_(bv),
237                 anchor_pit_(0), anchor_ypos_(0),
238                 inlineCompletionUniqueChars_(0),
239                 last_inset_(0), clickable_inset_(false),
240                 mouse_position_cache_(),
241                 bookmark_edit_position_(-1), gui_(0),
242                 horiz_scroll_offset_(0),
243                 caret_ascent_(0), caret_descent_(0)
244         {
245                 xsel_cache_.set = false;
246         }
247
248         ///
249         ScrollbarParameters scrollbarParameters_;
250         ///
251         ScreenUpdateStrategy update_strategy_;
252         ///
253         Update::flags update_flags_;
254         ///
255         CoordCache coord_cache_;
256
257         /// Estimated average par height for scrollbar.
258         int wh_;
259         /// this is used to handle XSelection events in the right manner.
260         struct {
261                 CursorSlice cursor;
262                 CursorSlice anchor;
263                 bool set;
264         } xsel_cache_;
265         ///
266         Cursor cursor_;
267         ///
268         pit_type anchor_pit_;
269         ///
270         int anchor_ypos_;
271         ///
272         vector<int> par_height_;
273
274         ///
275         DocIterator inlineCompletionPos_;
276         ///
277         docstring inlineCompletion_;
278         ///
279         size_t inlineCompletionUniqueChars_;
280
281         /// keyboard mapping object.
282         Intl intl_;
283
284         /// last visited inset.
285         /** kept to send setMouseHover(false).
286           * Not owned, so don't delete.
287           */
288         Inset const * last_inset_;
289         /// are we hovering something that we can click
290         bool clickable_inset_;
291
292         /// position of the mouse at the time of the last mouse move
293         /// This is used to update the hovering status of inset in
294         /// cases where the buffer is scrolled, but the mouse didn't move.
295         Point mouse_position_cache_;
296
297         // cache for id of the paragraph which was edited the last time
298         int bookmark_edit_position_;
299
300         mutable TextMetricsCache text_metrics_;
301
302         /// Whom to notify.
303         /** Not owned, so don't delete.
304           */
305         frontend::GuiBufferViewDelegate * gui_;
306
307         /// Cache for Find Next
308         FuncRequest search_request_cache_;
309
310         ///
311         map<string, Inset *> edited_insets_;
312
313         /// When the row where the cursor lies is scrolled, this
314         /// contains the scroll offset
315         int horiz_scroll_offset_;
316         /// a slice pointing to the start of the row where the cursor
317         /// is (at last draw time)
318         CursorSlice current_row_slice_;
319         /// a slice pointing to the start of the row where cursor was
320         /// at previous draw event
321         CursorSlice last_row_slice_;
322
323         // The vertical size of the blinking caret. Only used for math
324         // Using it for text could be bad when undo restores the cursor
325         // current font, since the caret size could become wrong.
326         int caret_ascent_;
327         int caret_descent_;
328 };
329
330
331 BufferView::BufferView(Buffer & buf)
332         : width_(0), height_(0), full_screen_(false), buffer_(buf),
333       d(new Private(*this))
334 {
335         d->xsel_cache_.set = false;
336         d->intl_.initKeyMapper(lyxrc.use_kbmap);
337
338         d->cursor_.setBuffer(&buf);
339         d->cursor_.push(buffer_.inset());
340         d->cursor_.resetAnchor();
341         d->cursor_.setCurrentFont();
342
343         buffer_.updatePreviews();
344 }
345
346
347 BufferView::~BufferView()
348 {
349         // current buffer is going to be switched-off, save cursor pos
350         // Ideally, the whole cursor stack should be saved, but session
351         // currently can only handle bottom (whole document) level pit and pos.
352         // That is to say, if a cursor is in a nested inset, it will be
353         // restore to the left of the top level inset.
354         LastFilePosSection::FilePos fp;
355         fp.pit = d->cursor_.bottom().pit();
356         fp.pos = d->cursor_.bottom().pos();
357         theSession().lastFilePos().save(buffer_.fileName(), fp);
358
359         if (d->last_inset_)
360                 d->last_inset_->setMouseHover(this, false);
361
362         delete d;
363 }
364
365
366 int BufferView::rightMargin() const
367 {
368         // The value used to be hardcoded to 10
369         int const default_margin = zoomedPixels(10);
370         // The additional test for the case the outliner is opened.
371         if (!full_screen_ || !lyxrc.full_screen_limit
372             || width_ < lyxrc.full_screen_width + 2 * default_margin)
373                 return default_margin;
374
375         return (width_ - lyxrc.full_screen_width) / 2;
376 }
377
378
379 int BufferView::leftMargin() const
380 {
381         return rightMargin();
382 }
383
384
385 int BufferView::inPixels(Length const & len) const
386 {
387         Font const font = buffer().params().getFont();
388         return len.inPixels(workWidth(), theFontMetrics(font).em());
389 }
390
391
392 int BufferView::zoomedPixels(int pix) const
393 {
394         // FIXME: the dpi setting should really depend on the BufferView
395         // (think different monitors).
396
397         // Zoom factor specified by user in percent
398         double const zoom = lyxrc.currentZoom / 100.0; // [percent]
399
400         // DPI setting for monitor relative to 100dpi
401         double const dpizoom = lyxrc.dpi / 100.0; // [per 100dpi]
402
403         return support::iround(pix * zoom * dpizoom);
404 }
405
406
407 bool BufferView::isTopScreen() const
408 {
409         return 0 == d->scrollbarParameters_.min;
410 }
411
412
413 bool BufferView::isBottomScreen() const
414 {
415         return 0 == d->scrollbarParameters_.max;
416 }
417
418
419 Intl & BufferView::getIntl()
420 {
421         return d->intl_;
422 }
423
424
425 Intl const & BufferView::getIntl() const
426 {
427         return d->intl_;
428 }
429
430
431 CoordCache & BufferView::coordCache()
432 {
433         return d->coord_cache_;
434 }
435
436
437 CoordCache const & BufferView::coordCache() const
438 {
439         return d->coord_cache_;
440 }
441
442
443 Buffer & BufferView::buffer()
444 {
445         return buffer_;
446 }
447
448
449 Buffer const & BufferView::buffer() const
450 {
451         return buffer_;
452 }
453
454
455 bool BufferView::needsFitCursor() const
456 {
457         if (cursorStatus(d->cursor_) == CUR_INSIDE) {
458                 frontend::FontMetrics const & fm =
459                         theFontMetrics(d->cursor_.getFont().fontInfo());
460                 int const asc = fm.maxAscent();
461                 int const des = fm.maxDescent();
462                 Point const p = getPos(d->cursor_);
463                 if (p.y_ - asc >= 0 && p.y_ + des < height_)
464                         return false;
465         }
466         return true;
467 }
468
469
470 namespace {
471
472 // this is for debugging only.
473 string flagsAsString(Update::flags flags)
474 {
475         if (flags == Update::None)
476                 return "None ";
477         return string((flags & Update::FitCursor) ? "FitCursor " : "")
478                 + ((flags & Update::Force) ? "Force " : "")
479                 + ((flags & Update::ForceDraw) ? "ForceDraw " : "")
480                 + ((flags & Update::SinglePar) ? "SinglePar " : "")
481                 + ((flags & Update::Decoration) ? "Decoration " : "");
482 }
483
484 }
485
486 void BufferView::processUpdateFlags(Update::flags flags)
487 {
488         LYXERR(Debug::PAINTING, "BufferView::processUpdateFlags( "
489                    << flagsAsString(flags) << ")  buffer: " << &buffer_);
490
491         // Case when no explicit update is requested.
492         if (flags == Update::None)
493                 return;
494
495         /* FIXME We would like to avoid doing this here, since it is very
496          * expensive and is called in updateBuffer already. However, even
497          * inserting a plain character can invalidate the overly fragile
498          * tables of child documents built by updateMacros. Some work is
499          * needed to avoid doing that when not necessary.
500          */
501         buffer_.updateMacros();
502
503         // SinglePar is ignored for now (this should probably change). We
504         // set it ourselves below, at the price of always rebreaking the
505         // paragraph at cursor. This can be expensive for large tables.
506         flags = flags & ~Update::SinglePar;
507
508         // First check whether the metrics and inset positions should be updated
509         if (flags & Update::Force) {
510                 // This will update the CoordCache items and replace Force
511                 // with ForceDraw in flags.
512                 updateMetrics(flags);
513         }
514
515         // Detect whether we can only repaint a single paragraph.
516         // We handle this before FitCursor because the later will require
517         // correct metrics at cursor position.
518         if (!(flags & Update::ForceDraw)) {
519                 if (singleParUpdate())
520                         flags = flags | Update::SinglePar;
521                 else
522                         updateMetrics(flags);
523         }
524
525         // Then make sure that the screen contains the cursor if needed
526         if (flags & Update::FitCursor) {
527                 if (needsFitCursor()) {
528                         scrollToCursor(d->cursor_, false);
529                         // Metrics have to be recomputed (maybe again)
530                         updateMetrics(flags);
531                 }
532                 flags = flags & ~Update::FitCursor;
533         }
534
535         // Add flags to the the update flags. These will be reset to None
536         // after the redraw is actually done
537         d->update_flags_ = d->update_flags_ | flags;
538         LYXERR(Debug::PAINTING, "Cumulative flags: " << flagsAsString(flags));
539
540         // Now compute the update strategy
541         // Possibly values in flag are None, Decoration, ForceDraw
542         LATTEST((d->update_flags_ & ~(Update::None | Update::SinglePar
543                                       | Update::Decoration | Update::ForceDraw)) == 0);
544
545         if (d->update_flags_ & Update::ForceDraw)
546                 d->update_strategy_ = FullScreenUpdate;
547         else if (d->update_flags_ & Update::Decoration)
548                 d->update_strategy_ = DecorationUpdate;
549         else if (d->update_flags_ & Update::SinglePar)
550                 d->update_strategy_ = SingleParUpdate;
551         else {
552                 // no need to redraw anything.
553                 d->update_strategy_ = NoScreenUpdate;
554         }
555
556         updateHoveredInset();
557
558         // Trigger a redraw.
559         buffer_.changed(false);
560 }
561
562
563 void BufferView::updateScrollbar()
564 {
565         if (height_ == 0 && width_ == 0)
566                 return;
567
568         // We prefer fixed size line scrolling.
569         d->scrollbarParameters_.single_step = defaultRowHeight();
570         // We prefer full screen page scrolling.
571         d->scrollbarParameters_.page_step = height_;
572
573         Text & t = buffer_.text();
574         TextMetrics & tm = d->text_metrics_[&t];
575
576         LYXERR(Debug::GUI, " Updating scrollbar: height: "
577                 << t.paragraphs().size()
578                 << " curr par: " << d->cursor_.bottom().pit()
579                 << " default height " << defaultRowHeight());
580
581         size_t const parsize = t.paragraphs().size();
582         if (d->par_height_.size() != parsize) {
583                 d->par_height_.clear();
584                 // FIXME: We assume a default paragraph height of 2 rows. This
585                 // should probably be pondered with the screen width.
586                 d->par_height_.resize(parsize, defaultRowHeight() * 2);
587         }
588
589         // Look at paragraph heights on-screen
590         pair<pit_type, ParagraphMetrics const *> first = tm.first();
591         pair<pit_type, ParagraphMetrics const *> last = tm.last();
592         for (pit_type pit = first.first; pit <= last.first; ++pit) {
593                 d->par_height_[pit] = tm.parMetrics(pit).height();
594                 LYXERR(Debug::SCROLLING, "storing height for pit " << pit << " : "
595                         << d->par_height_[pit]);
596         }
597
598         int top_pos = first.second->position() - first.second->ascent();
599         int bottom_pos = last.second->position() + last.second->descent();
600         bool first_visible = first.first == 0 && top_pos >= 0;
601         bool last_visible = last.first + 1 == int(parsize) && bottom_pos <= height_;
602         if (first_visible && last_visible) {
603                 d->scrollbarParameters_.min = 0;
604                 d->scrollbarParameters_.max = 0;
605                 return;
606         }
607
608         d->scrollbarParameters_.min = top_pos;
609         for (size_t i = 0; i != size_t(first.first); ++i)
610                 d->scrollbarParameters_.min -= d->par_height_[i];
611         d->scrollbarParameters_.max = bottom_pos;
612         for (size_t i = last.first + 1; i != parsize; ++i)
613                 d->scrollbarParameters_.max += d->par_height_[i];
614
615         // The reference is the top position so we remove one page.
616         if (lyxrc.scroll_below_document)
617                 d->scrollbarParameters_.max -= minVisiblePart();
618         else
619                 d->scrollbarParameters_.max -= d->scrollbarParameters_.page_step;
620
621         // 0 must be inside the range as it denotes the current position
622         if (d->scrollbarParameters_.max < 0)
623                 d->scrollbarParameters_.max = 0;
624         if (d->scrollbarParameters_.min > 0)
625                 d->scrollbarParameters_.min = 0;
626 }
627
628
629 ScrollbarParameters const & BufferView::scrollbarParameters() const
630 {
631         return d->scrollbarParameters_;
632 }
633
634
635 docstring BufferView::toolTip(int x, int y) const
636 {
637         // Get inset under mouse, if there is one.
638         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
639         if (!covering_inset)
640                 // No inset, no tooltip...
641                 return docstring();
642         return covering_inset->toolTip(*this, x, y);
643 }
644
645
646 string BufferView::contextMenu(int x, int y) const
647 {
648         //If there is a selection, return the containing inset menu
649         if (d->cursor_.selection())
650                 return d->cursor_.inset().contextMenu(*this, x, y);
651
652         // Get inset under mouse, if there is one.
653         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
654         if (covering_inset)
655                 return covering_inset->contextMenu(*this, x, y);
656
657         return buffer_.inset().contextMenu(*this, x, y);
658 }
659
660
661
662 void BufferView::scrollDocView(int const value, bool update)
663 {
664         // The scrollbar values are relative to the top of the screen, therefore the
665         // offset is equal to the target value.
666
667         // No scrolling at all? No need to redraw anything
668         if (value == 0)
669                 return;
670
671         // If the offset is less than 2 screen height, prefer to scroll instead.
672         if (abs(value) <= 2 * height_) {
673                 d->anchor_ypos_ -= value;
674                 processUpdateFlags(Update::Force);
675                 return;
676         }
677
678         // cut off at the top
679         if (value <= d->scrollbarParameters_.min) {
680                 DocIterator dit = doc_iterator_begin(&buffer_);
681                 showCursor(dit, false, update);
682                 LYXERR(Debug::SCROLLING, "scroll to top");
683                 return;
684         }
685
686         // cut off at the bottom
687         if (value >= d->scrollbarParameters_.max) {
688                 DocIterator dit = doc_iterator_end(&buffer_);
689                 dit.backwardPos();
690                 showCursor(dit, false, update);
691                 LYXERR(Debug::SCROLLING, "scroll to bottom");
692                 return;
693         }
694
695         // find paragraph at target position
696         int par_pos = d->scrollbarParameters_.min;
697         pit_type i = 0;
698         for (; i != int(d->par_height_.size()); ++i) {
699                 par_pos += d->par_height_[i];
700                 if (par_pos >= value)
701                         break;
702         }
703
704         if (par_pos < value) {
705                 // It seems we didn't find the correct pit so stay on the safe side and
706                 // scroll to bottom.
707                 LYXERR0("scrolling position not found!");
708                 scrollDocView(d->scrollbarParameters_.max, update);
709                 return;
710         }
711
712         DocIterator dit = doc_iterator_begin(&buffer_);
713         dit.pit() = i;
714         LYXERR(Debug::SCROLLING, "value = " << value << " -> scroll to pit " << i);
715         showCursor(dit, false, update);
716 }
717
718
719 // FIXME: this method is not working well.
720 void BufferView::setCursorFromScrollbar()
721 {
722         TextMetrics & tm = d->text_metrics_[&buffer_.text()];
723
724         int const height = 2 * defaultRowHeight();
725         int const first = height;
726         int const last = height_ - height;
727         int newy = 0;
728         Cursor const & oldcur = d->cursor_;
729
730         switch (cursorStatus(oldcur)) {
731         case CUR_ABOVE:
732                 newy = first;
733                 break;
734         case CUR_BELOW:
735                 newy = last;
736                 break;
737         case CUR_INSIDE:
738                 int const y = getPos(oldcur).y_;
739                 newy = min(last, max(y, first));
740                 if (y == newy)
741                         return;
742         }
743         // We reset the cursor because cursorStatus() does not
744         // work when the cursor is within mathed.
745         Cursor cur(*this);
746         cur.reset();
747         tm.setCursorFromCoordinates(cur, 0, newy);
748
749         // update the bufferview cursor and notify insets
750         // FIXME: Care about the d->cursor_ flags to redraw if needed
751         Cursor old = d->cursor_;
752         mouseSetCursor(cur);
753         // the DEPM call in mouseSetCursor() might have destroyed the
754         // paragraph the cursor is in.
755         bool badcursor = old.fixIfBroken();
756         badcursor |= notifyCursorLeavesOrEnters(old, d->cursor_);
757         if (badcursor)
758                 d->cursor_.fixIfBroken();
759 }
760
761
762 Change const BufferView::getCurrentChange() const
763 {
764         if (!d->cursor_.selection())
765                 return Change(Change::UNCHANGED);
766
767         DocIterator dit = d->cursor_.selectionBegin();
768         // The selected content might have been changed (see #7685)
769         dit = dit.getInnerText();
770         return dit.paragraph().lookupChange(dit.pos());
771 }
772
773
774 // this could be used elsewhere as well?
775 // FIXME: This does not work within mathed!
776 CursorStatus BufferView::cursorStatus(DocIterator const & dit) const
777 {
778         Point const p = getPos(dit);
779         if (p.y_ < 0)
780                 return CUR_ABOVE;
781         if (p.y_ > workHeight())
782                 return CUR_BELOW;
783         return CUR_INSIDE;
784 }
785
786
787 void BufferView::bookmarkEditPosition()
788 {
789         // Don't eat cpu time for each keystroke
790         if (d->cursor_.paragraph().id() == d->bookmark_edit_position_)
791                 return;
792         saveBookmark(0);
793         d->bookmark_edit_position_ = d->cursor_.paragraph().id();
794 }
795
796
797 void BufferView::saveBookmark(unsigned int idx)
798 {
799         // tentatively save bookmark, id and pos will be used to
800         // acturately locate a bookmark in a 'live' lyx session.
801         // pit and pos will be updated with bottom level pit/pos
802         // when lyx exits.
803         if (!buffer_.isInternal()) {
804                 theSession().bookmarks().save(
805                         buffer_.fileName(),
806                         d->cursor_.bottom().pit(),
807                         d->cursor_.bottom().pos(),
808                         d->cursor_.paragraph().id(),
809                         d->cursor_.pos(),
810                         idx
811                         );
812                 if (idx)
813                         // emit message signal.
814                         message(_("Save bookmark"));
815         }
816 }
817
818
819 bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
820         int top_id, pos_type top_pos)
821 {
822         bool success = false;
823         DocIterator dit;
824
825         d->cursor_.clearSelection();
826
827         // if a valid par_id is given, try it first
828         // This is the case for a 'live' bookmark when unique paragraph ID
829         // is used to track bookmarks.
830         if (top_id > 0) {
831                 dit = buffer_.getParFromID(top_id);
832                 if (!dit.atEnd()) {
833                         dit.pos() = min(dit.paragraph().size(), top_pos);
834                         // Some slices of the iterator may not be
835                         // reachable (e.g. closed collapsible inset)
836                         // so the dociterator may need to be
837                         // shortened. Otherwise, setCursor may crash
838                         // lyx when the cursor can not be set to these
839                         // insets.
840                         size_t const n = dit.depth();
841                         for (size_t i = 0; i < n; ++i)
842                                 if (!dit[i].inset().editable()) {
843                                         dit.resize(i);
844                                         break;
845                                 }
846                         success = true;
847                 }
848         }
849
850         // if top_id == 0, or searching through top_id failed
851         // This is the case for a 'restored' bookmark when only bottom
852         // (document level) pit was saved. Because of this, bookmark
853         // restoration is inaccurate. If a bookmark was within an inset,
854         // it will be restored to the left of the outmost inset that contains
855         // the bookmark.
856         if (bottom_pit < int(buffer_.paragraphs().size())) {
857                 dit = doc_iterator_begin(&buffer_);
858
859                 dit.pit() = bottom_pit;
860                 dit.pos() = min(bottom_pos, dit.paragraph().size());
861                 success = true;
862         }
863
864         if (success) {
865                 // Note: only bottom (document) level pit is set.
866                 setCursor(dit);
867                 // set the current font.
868                 d->cursor_.setCurrentFont();
869                 // Do not forget to reset the anchor (see #9912)
870                 d->cursor_.resetAnchor();
871                 processUpdateFlags(Update::FitCursor);
872         }
873
874         return success;
875 }
876
877
878 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
879 {
880         if (d->cursor_.real_current_font.isRightToLeft()) {
881                 if (d->intl_.keymap == Intl::PRIMARY)
882                         d->intl_.keyMapSec();
883         } else {
884                 if (d->intl_.keymap == Intl::SECONDARY)
885                         d->intl_.keyMapPrim();
886         }
887
888         d->intl_.getTransManager().translateAndInsert(c, t, cur);
889 }
890
891
892 int BufferView::workWidth() const
893 {
894         return width_;
895 }
896
897
898 void BufferView::recenter()
899 {
900         showCursor(d->cursor_, true, true);
901 }
902
903
904 void BufferView::showCursor()
905 {
906         showCursor(d->cursor_, false, true);
907 }
908
909
910 void BufferView::showCursor(DocIterator const & dit,
911         bool recenter, bool update)
912 {
913         if (scrollToCursor(dit, recenter) && update)
914                 processUpdateFlags(Update::Force);
915 }
916
917
918 void BufferView::scrollToCursor()
919 {
920         if (scrollToCursor(d->cursor_, false))
921                 processUpdateFlags(Update::Force);
922 }
923
924
925 bool BufferView::scrollToCursor(DocIterator const & dit, bool const recenter)
926 {
927         // We are not properly started yet, delay until resizing is
928         // done.
929         if (height_ == 0)
930                 return false;
931
932         LYXERR(Debug::SCROLLING, "recentering!");
933
934         CursorSlice const & bot = dit.bottom();
935         TextMetrics & tm = d->text_metrics_[bot.text()];
936
937         pos_type const max_pit = pos_type(bot.text()->paragraphs().size() - 1);
938         int bot_pit = bot.pit();
939         if (bot_pit > max_pit) {
940                 // FIXME: Why does this happen?
941                 LYXERR0("bottom pit is greater that max pit: "
942                         << bot_pit << " > " << max_pit);
943                 bot_pit = max_pit;
944         }
945
946         if (bot_pit == tm.first().first - 1)
947                 tm.newParMetricsUp();
948         else if (bot_pit == tm.last().first + 1)
949                 tm.newParMetricsDown();
950
951         if (tm.contains(bot_pit)) {
952                 ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
953                 LBUFERR(!pm.rows().empty());
954                 // FIXME: smooth scrolling doesn't work in mathed.
955                 CursorSlice const & cs = dit.innerTextSlice();
956                 int offset = coordOffset(dit).y_;
957                 int ypos = pm.position() + offset;
958                 Dimension const & row_dim =
959                         pm.getRow(cs.pos(), dit.boundary()).dimension();
960                 int scrolled = 0;
961                 if (recenter)
962                         scrolled = scroll(ypos - height_/2);
963
964                 // We try to visualize the whole row, if the row height is larger than
965                 // the screen height, we scroll to a heuristic value of height_ / 4.
966                 // FIXME: This heuristic value should be replaced by a recursive search
967                 // for a row in the inset that can be visualized completely.
968                 else if (row_dim.height() > height_) {
969                         if (ypos < defaultRowHeight())
970                                 scrolled = scroll(ypos - height_ / 4);
971                         else if (ypos > height_ - defaultRowHeight())
972                                 scrolled = scroll(ypos - 3 * height_ / 4);
973                 }
974
975                 // If the top part of the row falls of the screen, we scroll
976                 // up to align the top of the row with the top of the screen.
977                 else if (ypos - row_dim.ascent() < 0 && ypos < height_) {
978                         int ynew = row_dim.ascent();
979                         scrolled = scrollUp(ynew - ypos);
980                 }
981
982                 // If the bottom of the row falls of the screen, we scroll down.
983                 else if (ypos + row_dim.descent() > height_ && ypos > 0) {
984                         int ynew = height_ - row_dim.descent();
985                         scrolled = scrollDown(ypos - ynew);
986                 }
987
988                 // else, nothing to do, the cursor is already visible so we just return.
989                 return scrolled != 0;
990         }
991
992         // fix inline completion position
993         if (d->inlineCompletionPos_.fixIfBroken())
994                 d->inlineCompletionPos_ = DocIterator();
995
996         tm.redoParagraph(bot_pit);
997         ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
998         int offset = coordOffset(dit).y_;
999
1000         d->anchor_pit_ = bot_pit;
1001         CursorSlice const & cs = dit.innerTextSlice();
1002         Dimension const & row_dim =
1003                 pm.getRow(cs.pos(), dit.boundary()).dimension();
1004
1005         if (recenter)
1006                 d->anchor_ypos_ = height_/2;
1007         else if (d->anchor_pit_ == 0)
1008                 d->anchor_ypos_ = offset + pm.ascent();
1009         else if (d->anchor_pit_ == max_pit)
1010                 d->anchor_ypos_ = height_ - offset - row_dim.descent();
1011         else if (offset > height_)
1012                 d->anchor_ypos_ = height_ - offset - defaultRowHeight();
1013         else
1014                 d->anchor_ypos_ = defaultRowHeight() * 2;
1015
1016         return true;
1017 }
1018
1019
1020 void BufferView::makeDocumentClass()
1021 {
1022         DocumentClassConstPtr olddc = buffer_.params().documentClassPtr();
1023         buffer_.params().makeDocumentClass();
1024         updateDocumentClass(olddc);
1025 }
1026
1027
1028 void BufferView::updateDocumentClass(DocumentClassConstPtr olddc)
1029 {
1030         message(_("Converting document to new document class..."));
1031
1032         StableDocIterator backcur(d->cursor_);
1033         ErrorList & el = buffer_.errorList("Class Switch");
1034         cap::switchBetweenClasses(
1035                         olddc, buffer_.params().documentClassPtr(),
1036                         static_cast<InsetText &>(buffer_.inset()), el);
1037
1038         setCursor(backcur.asDocIterator(&buffer_));
1039
1040         buffer_.errors("Class Switch");
1041 }
1042
1043
1044 /** Return the change status at cursor position, taking into account the
1045  * status at each level of the document iterator (a table in a deleted
1046  * footnote is deleted).
1047  * When \param outer is true, the top slice is not looked at.
1048  */
1049 static Change::Type lookupChangeType(DocIterator const & dit, bool outer = false)
1050 {
1051         size_t const depth = dit.depth() - (outer ? 1 : 0);
1052
1053         for (size_t i = 0 ; i < depth ; ++i) {
1054                 CursorSlice const & slice = dit[i];
1055                 if (!slice.inset().inMathed()
1056                     && slice.pos() < slice.paragraph().size()) {
1057                         Change::Type const ch = slice.paragraph().lookupChange(slice.pos()).type;
1058                         if (ch != Change::UNCHANGED)
1059                                 return ch;
1060                 }
1061         }
1062         return Change::UNCHANGED;
1063 }
1064
1065
1066 bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
1067 {
1068         FuncCode const act = cmd.action();
1069
1070         // Can we use a readonly buffer?
1071         if (buffer_.isReadonly()
1072             && !lyxaction.funcHasFlag(act, LyXAction::ReadOnly)
1073             && !lyxaction.funcHasFlag(act, LyXAction::NoBuffer)) {
1074                 if (buffer_.hasReadonlyFlag())
1075                         flag.message(from_utf8(N_("Document is read-only")));
1076                 else
1077                         flag.message(from_utf8(N_("Document has been modified externally")));
1078                 flag.setEnabled(false);
1079                 return true;
1080         }
1081
1082         // Are we in a DELETED change-tracking region?
1083         if (lookupChangeType(d->cursor_, true) == Change::DELETED
1084             && !lyxaction.funcHasFlag(act, LyXAction::ReadOnly)
1085             && !lyxaction.funcHasFlag(act, LyXAction::NoBuffer)) {
1086                 flag.message(from_utf8(N_("This portion of the document is deleted.")));
1087                 flag.setEnabled(false);
1088                 return true;
1089         }
1090
1091         Cursor & cur = d->cursor_;
1092
1093         if (cur.getStatus(cmd, flag))
1094                 return true;
1095
1096         switch (act) {
1097
1098         // FIXME: This is a bit problematic because we don't check if this is
1099         // a document BufferView or not for these LFUNs. We probably have to
1100         // dispatch both to currentBufferView() and, if that fails,
1101         // to documentBufferView(); same as we do now for current Buffer and
1102         // document Buffer. Ideally those LFUN should go to Buffer as they
1103         // operate on the full Buffer and the cursor is only needed either for
1104         // an Undo record or to restore a cursor position. But we don't know
1105         // how to do that inside Buffer of course.
1106         case LFUN_BUFFER_PARAMS_APPLY:
1107         case LFUN_LAYOUT_MODULES_CLEAR:
1108         case LFUN_LAYOUT_MODULE_ADD:
1109         case LFUN_LAYOUT_RELOAD:
1110         case LFUN_TEXTCLASS_APPLY:
1111         case LFUN_TEXTCLASS_LOAD:
1112                 flag.setEnabled(!buffer_.isReadonly());
1113                 break;
1114
1115         case LFUN_UNDO:
1116                 // We do not use the LyXAction flag for readonly because Undo sets the
1117                 // buffer clean/dirty status by itself.
1118                 flag.setEnabled(!buffer_.isReadonly() && buffer_.undo().hasUndoStack());
1119                 break;
1120         case LFUN_REDO:
1121                 // We do not use the LyXAction flag for readonly because Redo sets the
1122                 // buffer clean/dirty status by itself.
1123                 flag.setEnabled(!buffer_.isReadonly() && buffer_.undo().hasRedoStack());
1124                 break;
1125         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
1126         case LFUN_FILE_INSERT_PLAINTEXT: {
1127                 docstring const fname = cmd.argument();
1128                 if (!FileName::isAbsolute(to_utf8(fname))) {
1129                         flag.message(_("Absolute filename expected."));
1130                         return false;
1131                 }
1132                 flag.setEnabled(cur.inTexted());
1133                 break;
1134         }
1135         case LFUN_FILE_INSERT:
1136         case LFUN_BOOKMARK_SAVE:
1137                 // FIXME: Actually, these LFUNS should be moved to Text
1138                 flag.setEnabled(cur.inTexted());
1139                 break;
1140
1141         case LFUN_FONT_STATE:
1142         case LFUN_LABEL_INSERT:
1143         case LFUN_INFO_INSERT:
1144         case LFUN_PARAGRAPH_GOTO:
1145         case LFUN_NOTE_NEXT:
1146         case LFUN_REFERENCE_NEXT:
1147         case LFUN_WORD_FIND:
1148         case LFUN_WORD_FIND_FORWARD:
1149         case LFUN_WORD_FIND_BACKWARD:
1150         case LFUN_WORD_REPLACE:
1151         case LFUN_MARK_OFF:
1152         case LFUN_MARK_ON:
1153         case LFUN_MARK_TOGGLE:
1154         case LFUN_SCREEN_RECENTER:
1155         case LFUN_SCREEN_SHOW_CURSOR:
1156         case LFUN_BIBTEX_DATABASE_ADD:
1157         case LFUN_BIBTEX_DATABASE_DEL:
1158         case LFUN_STATISTICS:
1159         case LFUN_KEYMAP_OFF:
1160         case LFUN_KEYMAP_PRIMARY:
1161         case LFUN_KEYMAP_SECONDARY:
1162         case LFUN_KEYMAP_TOGGLE:
1163         case LFUN_INSET_SELECT_ALL:
1164                 flag.setEnabled(true);
1165                 break;
1166
1167         case LFUN_GRAPHICS_UNIFY:
1168                 flag.setEnabled(cur.countInsetsInSelection(GRAPHICS_CODE)>1);
1169                 break;
1170
1171         case LFUN_WORD_FINDADV: {
1172                 FindAndReplaceOptions opt;
1173                 istringstream iss(to_utf8(cmd.argument()));
1174                 iss >> opt;
1175                 flag.setEnabled(opt.repl_buf_name.empty()
1176                                 || !buffer_.isReadonly());
1177                 break;
1178         }
1179
1180         case LFUN_LABEL_GOTO:
1181                 flag.setEnabled(!cmd.argument().empty()
1182                     || getInsetByCode<InsetRef>(cur, REF_CODE));
1183                 break;
1184
1185         case LFUN_CHANGES_MERGE:
1186         case LFUN_CHANGE_NEXT:
1187         case LFUN_CHANGE_PREVIOUS:
1188         case LFUN_ALL_CHANGES_ACCEPT:
1189         case LFUN_ALL_CHANGES_REJECT:
1190                 flag.setEnabled(buffer_.areChangesPresent());
1191                 break;
1192
1193         case LFUN_SCREEN_UP:
1194         case LFUN_SCREEN_DOWN:
1195         case LFUN_SCROLL:
1196         case LFUN_SCREEN_UP_SELECT:
1197         case LFUN_SCREEN_DOWN_SELECT:
1198         case LFUN_INSET_FORALL:
1199                 flag.setEnabled(true);
1200                 break;
1201
1202         case LFUN_LAYOUT_TABULAR:
1203                 flag.setEnabled(cur.innerInsetOfType(TABULAR_CODE));
1204                 break;
1205
1206         case LFUN_LAYOUT:
1207                 flag.setEnabled(!cur.inset().forcePlainLayout(cur.idx()));
1208                 break;
1209
1210         case LFUN_LAYOUT_PARAGRAPH:
1211                 flag.setEnabled(cur.inset().allowParagraphCustomization(cur.idx()));
1212                 break;
1213
1214         case LFUN_BRANCH_ADD_INSERT:
1215                 flag.setEnabled(!(cur.inTexted() && cur.paragraph().isPassThru()));
1216                 break;
1217
1218         case LFUN_DIALOG_SHOW_NEW_INSET:
1219                 // FIXME: this is wrong, but I do not understand the
1220                 // intent (JMarc)
1221                 if (cur.inset().lyxCode() == CAPTION_CODE)
1222                         return cur.inset().getStatus(cur, cmd, flag);
1223                 // FIXME we should consider passthru paragraphs too.
1224                 flag.setEnabled(!(cur.inTexted() && cur.paragraph().isPassThru()));
1225                 break;
1226
1227         case LFUN_CITATION_INSERT: {
1228                 FuncRequest fr(LFUN_INSET_INSERT, "citation");
1229                 // FIXME: This could turn in a recursive hell.
1230                 // Shouldn't we use Buffer::getStatus() instead?
1231                 flag.setEnabled(lyx::getStatus(fr).enabled());
1232                 break;
1233         }
1234         case LFUN_INSET_APPLY: {
1235                 string const name = cmd.getArg(0);
1236                 Inset * inset = editedInset(name);
1237                 if (inset) {
1238                         FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
1239                         if (!inset->getStatus(cur, fr, flag)) {
1240                                 // Every inset is supposed to handle this
1241                                 LASSERT(false, break);
1242                         }
1243                 } else {
1244                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
1245                         flag = lyx::getStatus(fr);
1246                 }
1247                 break;
1248         }
1249
1250         default:
1251                 return false;
1252         }
1253
1254         return true;
1255 }
1256
1257
1258 Inset * BufferView::editedInset(string const & name) const
1259 {
1260         map<string, Inset *>::const_iterator it = d->edited_insets_.find(name);
1261         return it == d->edited_insets_.end() ? 0 : it->second;
1262 }
1263
1264
1265 void BufferView::editInset(string const & name, Inset * inset)
1266 {
1267         d->edited_insets_[name] = inset;
1268 }
1269
1270
1271 void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
1272 {
1273         LYXERR(Debug::ACTION, "BufferView::dispatch: cmd: " << cmd);
1274
1275         string const argument = to_utf8(cmd.argument());
1276         Cursor & cur = d->cursor_;
1277         Cursor old = cur;
1278
1279         // Don't dispatch function that does not apply to internal buffers.
1280         if (buffer_.isInternal()
1281             && lyxaction.funcHasFlag(cmd.action(), LyXAction::NoInternal))
1282                 return;
1283
1284         // We'll set this back to false if need be.
1285         bool dispatched = true;
1286         buffer_.undo().beginUndoGroup();
1287
1288         FuncCode const act = cmd.action();
1289         switch (act) {
1290
1291         case LFUN_BUFFER_PARAMS_APPLY: {
1292                 DocumentClassConstPtr olddc = buffer_.params().documentClassPtr();
1293                 cur.recordUndoBufferParams();
1294                 istringstream ss(to_utf8(cmd.argument()));
1295                 Lexer lex;
1296                 lex.setStream(ss);
1297                 int const unknown_tokens = buffer_.readHeader(lex);
1298                 if (unknown_tokens != 0) {
1299                         LYXERR0("Warning in LFUN_BUFFER_PARAMS_APPLY!\n"
1300                                                 << unknown_tokens << " unknown token"
1301                                                 << (unknown_tokens == 1 ? "" : "s"));
1302                 }
1303                 updateDocumentClass(olddc);
1304
1305                 // We are most certainly here because of a change in the document
1306                 // It is then better to make sure that all dialogs are in sync with
1307                 // current document settings.
1308                 dr.screenUpdate(Update::Force | Update::FitCursor);
1309                 dr.forceBufferUpdate();
1310                 break;
1311         }
1312
1313         case LFUN_LAYOUT_MODULES_CLEAR: {
1314                 // FIXME: this modifies the document in cap::switchBetweenClasses
1315                 //  without calling recordUndo. Fix this before using
1316                 //  recordUndoBufferParams().
1317                 cur.recordUndoFullBuffer();
1318                 buffer_.params().clearLayoutModules();
1319                 makeDocumentClass();
1320                 dr.screenUpdate(Update::Force);
1321                 dr.forceBufferUpdate();
1322                 break;
1323         }
1324
1325         case LFUN_LAYOUT_MODULE_ADD: {
1326                 BufferParams const & params = buffer_.params();
1327                 if (!params.layoutModuleCanBeAdded(argument)) {
1328                         LYXERR0("Module `" << argument <<
1329                                 "' cannot be added due to failed requirements or "
1330                                 "conflicts with installed modules.");
1331                         break;
1332                 }
1333                 // FIXME: this modifies the document in cap::switchBetweenClasses
1334                 //  without calling recordUndo. Fix this before using
1335                 //  recordUndoBufferParams().
1336                 cur.recordUndoFullBuffer();
1337                 buffer_.params().addLayoutModule(argument);
1338                 makeDocumentClass();
1339                 dr.screenUpdate(Update::Force);
1340                 dr.forceBufferUpdate();
1341                 break;
1342         }
1343
1344         case LFUN_TEXTCLASS_APPLY: {
1345                 // since this shortcircuits, the second call is made only if
1346                 // the first fails
1347                 bool const success =
1348                         LayoutFileList::get().load(argument, buffer_.temppath()) ||
1349                         LayoutFileList::get().load(argument, buffer_.filePath());
1350                 if (!success) {
1351                         docstring s = bformat(_("The document class `%1$s' "
1352                                                  "could not be loaded."), from_utf8(argument));
1353                         frontend::Alert::error(_("Could not load class"), s);
1354                         break;
1355                 }
1356
1357                 LayoutFile const * old_layout = buffer_.params().baseClass();
1358                 LayoutFile const * new_layout = &(LayoutFileList::get()[argument]);
1359
1360                 if (old_layout == new_layout)
1361                         // nothing to do
1362                         break;
1363
1364                 // Save the old, possibly modular, layout for use in conversion.
1365                 // FIXME: this modifies the document in cap::switchBetweenClasses
1366                 //  without calling recordUndo. Fix this before using
1367                 //  recordUndoBufferParams().
1368                 cur.recordUndoFullBuffer();
1369                 buffer_.params().setBaseClass(argument, buffer_.layoutPos());
1370                 makeDocumentClass();
1371                 dr.screenUpdate(Update::Force);
1372                 dr.forceBufferUpdate();
1373                 break;
1374         }
1375
1376         case LFUN_TEXTCLASS_LOAD: {
1377                 // since this shortcircuits, the second call is made only if
1378                 // the first fails
1379                 bool const success =
1380                         LayoutFileList::get().load(argument, buffer_.temppath()) ||
1381                         LayoutFileList::get().load(argument, buffer_.filePath());
1382                 if (!success) {
1383                         docstring s = bformat(_("The document class `%1$s' "
1384                                                  "could not be loaded."), from_utf8(argument));
1385                         frontend::Alert::error(_("Could not load class"), s);
1386                 }
1387                 break;
1388         }
1389
1390         case LFUN_LAYOUT_RELOAD: {
1391                 LayoutFileIndex bc = buffer_.params().baseClassID();
1392                 LayoutFileList::get().reset(bc);
1393                 buffer_.params().setBaseClass(bc, buffer_.layoutPos());
1394                 makeDocumentClass();
1395                 dr.screenUpdate(Update::Force);
1396                 dr.forceBufferUpdate();
1397                 break;
1398         }
1399
1400         case LFUN_UNDO: {
1401                 dr.setMessage(_("Undo"));
1402                 cur.clearSelection();
1403                 // We need to find out if the bibliography information
1404                 // has changed. See bug #11055.
1405                 // So these should not be references...
1406                 string const engine = buffer().params().citeEngine();
1407                 CiteEngineType const enginetype = buffer().params().citeEngineType();
1408                 if (!cur.undoAction())
1409                         dr.setMessage(_("No further undo information"));
1410                 else {
1411                         dr.screenUpdate(Update::Force | Update::FitCursor);
1412                         dr.forceBufferUpdate();
1413                         if (buffer().params().citeEngine() != engine ||
1414                             buffer().params().citeEngineType() != enginetype)
1415                                 buffer().invalidateCiteLabels();
1416                 }
1417                 break;
1418         }
1419
1420         case LFUN_REDO: {
1421                 dr.setMessage(_("Redo"));
1422                 cur.clearSelection();
1423                 // We need to find out if the bibliography information
1424                 // has changed. See bug #11055.
1425                 // So these should not be references...
1426                 string const engine = buffer().params().citeEngine();
1427                 CiteEngineType const enginetype = buffer().params().citeEngineType();
1428                 if (!cur.redoAction())
1429                         dr.setMessage(_("No further redo information"));
1430                 else {
1431                         dr.screenUpdate(Update::Force | Update::FitCursor);
1432                         dr.forceBufferUpdate();
1433                         if (buffer().params().citeEngine() != engine ||
1434                             buffer().params().citeEngineType() != enginetype)
1435                                 buffer().invalidateCiteLabels();
1436                 }
1437                 break;
1438         }
1439
1440         case LFUN_FONT_STATE:
1441                 dr.setMessage(cur.currentState(false));
1442                 break;
1443
1444         case LFUN_BOOKMARK_SAVE:
1445                 saveBookmark(convert<unsigned int>(to_utf8(cmd.argument())));
1446                 break;
1447
1448         case LFUN_LABEL_GOTO: {
1449                 docstring label = cmd.argument();
1450                 if (label.empty()) {
1451                         InsetRef * inset =
1452                                 getInsetByCode<InsetRef>(cur, REF_CODE);
1453                         if (inset) {
1454                                 label = inset->getParam("reference");
1455                                 // persistent=false: use temp_bookmark
1456                                 saveBookmark(0);
1457                         }
1458                 }
1459                 if (!label.empty()) {
1460                         gotoLabel(label);
1461                         // at the moment, this is redundant, since gotoLabel will
1462                         // eventually call LFUN_PARAGRAPH_GOTO, but it seems best
1463                         // to have it here.
1464                         dr.screenUpdate(Update::Force | Update::FitCursor);
1465                 }
1466                 break;
1467         }
1468
1469         case LFUN_PARAGRAPH_GOTO: {
1470                 int const id = convert<int>(cmd.getArg(0));
1471                 pos_type const pos = convert<int>(cmd.getArg(1));
1472                 if (id < 0)
1473                         break;
1474                 string const str_id_end = cmd.getArg(2);
1475                 string const str_pos_end = cmd.getArg(3);
1476                 int i = 0;
1477                 for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
1478                         b = theBufferList().next(b)) {
1479
1480                         Cursor curs(*this);
1481                         curs.setCursor(b->getParFromID(id));
1482                         if (curs.atEnd()) {
1483                                 LYXERR(Debug::INFO, "No matching paragraph found! [" << id << "].");
1484                                 ++i;
1485                                 continue;
1486                         }
1487                         LYXERR(Debug::INFO, "Paragraph " << curs.paragraph().id()
1488                                 << " found in buffer `"
1489                                 << b->absFileName() << "'.");
1490
1491                         if (b == &buffer_) {
1492                                 bool success;
1493                                 if (str_id_end.empty() || str_pos_end.empty()) {
1494                                         // Set the cursor
1495                                         curs.pos() = pos;
1496                                         mouseSetCursor(curs);
1497                                         success = true;
1498                                 } else {
1499                                         int const id_end = convert<int>(str_id_end);
1500                                         pos_type const pos_end = convert<int>(str_pos_end);
1501                                         success = setCursorFromEntries({id, pos},
1502                                                                        {id_end, pos_end});
1503                                 }
1504                                 if (success)
1505                                         dr.screenUpdate(Update::Force | Update::FitCursor);
1506                         } else {
1507                                 // Switch to other buffer view and resend cmd
1508                                 lyx::dispatch(FuncRequest(
1509                                         LFUN_BUFFER_SWITCH, b->absFileName()));
1510                                 lyx::dispatch(cmd);
1511                         }
1512                         break;
1513                 }
1514                 break;
1515         }
1516
1517         case LFUN_NOTE_NEXT:
1518                 gotoInset(this, NOTE_CODE, false);
1519                 break;
1520
1521         case LFUN_REFERENCE_NEXT: {
1522                 vector<InsetCode> tmp;
1523                 tmp.push_back(LABEL_CODE);
1524                 tmp.push_back(REF_CODE);
1525                 gotoInset(this, tmp, true);
1526                 break;
1527         }
1528
1529         case LFUN_CHANGE_NEXT:
1530                 findNextChange(this);
1531                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1532                 dr.screenUpdate(Update::Force | Update::FitCursor);
1533                 break;
1534
1535         case LFUN_CHANGE_PREVIOUS:
1536                 findPreviousChange(this);
1537                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1538                 dr.screenUpdate(Update::Force | Update::FitCursor);
1539                 break;
1540
1541         case LFUN_CHANGES_MERGE:
1542                 if (findNextChange(this) || findPreviousChange(this)) {
1543                         dr.screenUpdate(Update::Force | Update::FitCursor);
1544                         dr.forceBufferUpdate();
1545                         showDialog("changes");
1546                 }
1547                 break;
1548
1549         case LFUN_ALL_CHANGES_ACCEPT:
1550                 // select complete document
1551                 cur.reset();
1552                 cur.selHandle(true);
1553                 buffer_.text().cursorBottom(cur);
1554                 // accept everything in a single step to support atomic undo
1555                 buffer_.text().acceptOrRejectChanges(cur, Text::ACCEPT);
1556                 cur.resetAnchor();
1557                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1558                 dr.screenUpdate(Update::Force | Update::FitCursor);
1559                 dr.forceBufferUpdate();
1560                 break;
1561
1562         case LFUN_ALL_CHANGES_REJECT:
1563                 // select complete document
1564                 cur.reset();
1565                 cur.selHandle(true);
1566                 buffer_.text().cursorBottom(cur);
1567                 // reject everything in a single step to support atomic undo
1568                 // Note: reject does not work recursively; the user may have to repeat the operation
1569                 buffer_.text().acceptOrRejectChanges(cur, Text::REJECT);
1570                 cur.resetAnchor();
1571                 // FIXME: Move this LFUN to Buffer so that we don't have to do this:
1572                 dr.screenUpdate(Update::Force | Update::FitCursor);
1573                 dr.forceBufferUpdate();
1574                 break;
1575
1576         case LFUN_WORD_FIND_FORWARD:
1577         case LFUN_WORD_FIND_BACKWARD: {
1578                 // FIXME THREAD
1579                 // Would it maybe be better if this variable were view specific anyway?
1580                 static docstring last_search;
1581                 docstring searched_string;
1582
1583                 if (!cmd.argument().empty()) {
1584                         last_search = cmd.argument();
1585                         searched_string = cmd.argument();
1586                 } else {
1587                         searched_string = last_search;
1588                 }
1589
1590                 if (searched_string.empty())
1591                         break;
1592
1593                 bool const fw = act == LFUN_WORD_FIND_FORWARD;
1594                 docstring const data =
1595                         find2string(searched_string, true, false, fw);
1596                 bool found = lyxfind(this, FuncRequest(LFUN_WORD_FIND, data));
1597                 if (found)
1598                         dr.screenUpdate(Update::Force | Update::FitCursor);
1599                 break;
1600         }
1601
1602         case LFUN_WORD_FIND: {
1603                 FuncRequest req = cmd;
1604                 if (cmd.argument().empty() && !d->search_request_cache_.argument().empty())
1605                         req = d->search_request_cache_;
1606                 if (req.argument().empty()) {
1607                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, "findreplace"));
1608                         break;
1609                 }
1610                 if (lyxfind(this, req))
1611                         dr.screenUpdate(Update::Force | Update::FitCursor);
1612
1613                 d->search_request_cache_ = req;
1614                 break;
1615         }
1616
1617         case LFUN_WORD_REPLACE: {
1618                 bool has_deleted = false;
1619                 if (cur.selection()) {
1620                         DocIterator beg = cur.selectionBegin();
1621                         DocIterator end = cur.selectionEnd();
1622                         if (beg.pit() == end.pit()) {
1623                                 for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
1624                                         if (!cur.inMathed() && cur.paragraph().isDeleted(p)) {
1625                                                 has_deleted = true;
1626                                                 break;
1627                                         }
1628                                 }
1629                         }
1630                 }
1631                 if (lyxreplace(this, cmd, has_deleted)) {
1632                         dr.forceBufferUpdate();
1633                         dr.screenUpdate(Update::Force | Update::FitCursor);
1634                 }
1635                 break;
1636         }
1637
1638         case LFUN_WORD_FINDADV: {
1639                 FindAndReplaceOptions opt;
1640                 istringstream iss(to_utf8(cmd.argument()));
1641                 iss >> opt;
1642                 if (findAdv(this, opt)) {
1643                         dr.screenUpdate(Update::Force | Update::FitCursor);
1644                         cur.dispatched();
1645                         dispatched = true;
1646                 } else {
1647                         cur.undispatched();
1648                         dispatched = false;
1649                 }
1650                 break;
1651         }
1652
1653         case LFUN_MARK_OFF:
1654                 cur.clearSelection();
1655                 dr.setMessage(from_utf8(N_("Mark off")));
1656                 break;
1657
1658         case LFUN_MARK_ON:
1659                 cur.clearSelection();
1660                 cur.setMark(true);
1661                 dr.setMessage(from_utf8(N_("Mark on")));
1662                 break;
1663
1664         case LFUN_MARK_TOGGLE:
1665                 cur.selection(false);
1666                 if (cur.mark()) {
1667                         cur.setMark(false);
1668                         dr.setMessage(from_utf8(N_("Mark removed")));
1669                 } else {
1670                         cur.setMark(true);
1671                         dr.setMessage(from_utf8(N_("Mark set")));
1672                 }
1673                 cur.resetAnchor();
1674                 break;
1675
1676         case LFUN_SCREEN_SHOW_CURSOR:
1677                 showCursor();
1678                 break;
1679
1680         case LFUN_SCREEN_RECENTER:
1681                 recenter();
1682                 break;
1683
1684         case LFUN_BIBTEX_DATABASE_ADD: {
1685                 Cursor tmpcur = cur;
1686                 findInset(tmpcur, BIBTEX_CODE, false);
1687                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1688                                                 BIBTEX_CODE);
1689                 if (inset) {
1690                         if (inset->addDatabase(cmd.argument()))
1691                                 dr.forceBufferUpdate();
1692                 }
1693                 break;
1694         }
1695
1696         case LFUN_BIBTEX_DATABASE_DEL: {
1697                 Cursor tmpcur = cur;
1698                 findInset(tmpcur, BIBTEX_CODE, false);
1699                 InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
1700                                                 BIBTEX_CODE);
1701                 if (inset) {
1702                         if (inset->delDatabase(cmd.argument()))
1703                                 dr.forceBufferUpdate();
1704                 }
1705                 break;
1706         }
1707
1708         case LFUN_GRAPHICS_UNIFY: {
1709
1710                 cur.recordUndoFullBuffer();
1711
1712                 DocIterator from, to;
1713                 from = cur.selectionBegin();
1714                 to = cur.selectionEnd();
1715
1716                 string const newId = cmd.getArg(0);
1717                 bool fetchId = newId.empty(); //if we wait for groupId from first graphics inset
1718
1719                 InsetGraphicsParams grp_par;
1720                 if (!fetchId)
1721                         InsetGraphics::string2params(graphics::getGroupParams(buffer_, newId), buffer_, grp_par);
1722
1723                 if (!from.nextInset())  //move to closest inset
1724                         from.forwardInset();
1725
1726                 while (!from.empty() && from < to) {
1727                         Inset * inset = from.nextInset();
1728                         if (!inset)
1729                                 break;
1730                         InsetGraphics * ig = inset->asInsetGraphics();
1731                         if (ig) {
1732                                 InsetGraphicsParams inspar = ig->getParams();
1733                                 if (fetchId) {
1734                                         grp_par = inspar;
1735                                         fetchId = false;
1736                                 } else {
1737                                         grp_par.filename = inspar.filename;
1738                                         ig->setParams(grp_par);
1739                                 }
1740                         }
1741                         from.forwardInset();
1742                 }
1743                 dr.screenUpdate(Update::Force); //needed if triggered from context menu
1744                 break;
1745         }
1746
1747         case LFUN_STATISTICS: {
1748                 DocIterator from, to;
1749                 if (cur.selection()) {
1750                         from = cur.selectionBegin();
1751                         to = cur.selectionEnd();
1752                 } else {
1753                         from = doc_iterator_begin(&buffer_);
1754                         to = doc_iterator_end(&buffer_);
1755                 }
1756                 buffer_.updateStatistics(from, to);
1757                 int const words = buffer_.wordCount();
1758                 int const chars = buffer_.charCount(false);
1759                 int const chars_blanks = buffer_.charCount(true);
1760                 docstring message;
1761                 if (cur.selection())
1762                         message = _("Statistics for the selection:");
1763                 else
1764                         message = _("Statistics for the document:");
1765                 message += "\n\n";
1766                 if (words != 1)
1767                         message += bformat(_("%1$d words"), words);
1768                 else
1769                         message += _("One word");
1770                 message += "\n";
1771                 if (chars_blanks != 1)
1772                         message += bformat(_("%1$d characters (including blanks)"),
1773                                           chars_blanks);
1774                 else
1775                         message += _("One character (including blanks)");
1776                 message += "\n";
1777                 if (chars != 1)
1778                         message += bformat(_("%1$d characters (excluding blanks)"),
1779                                           chars);
1780                 else
1781                         message += _("One character (excluding blanks)");
1782
1783                 Alert::information(_("Statistics"), message);
1784         }
1785                 break;
1786
1787         case LFUN_SCREEN_UP:
1788         case LFUN_SCREEN_DOWN: {
1789                 Point p = getPos(cur);
1790                 // This code has been commented out to enable to scroll down a
1791                 // document, even if there are large insets in it (see bug #5465).
1792                 /*if (p.y_ < 0 || p.y_ > height_) {
1793                         // The cursor is off-screen so recenter before proceeding.
1794                         showCursor();
1795                         p = getPos(cur);
1796                 }*/
1797                 int const scrolled = scroll(act == LFUN_SCREEN_UP
1798                         ? -height_ : height_);
1799                 if (act == LFUN_SCREEN_UP && scrolled > -height_)
1800                         p = Point(0, 0);
1801                 if (act == LFUN_SCREEN_DOWN && scrolled < height_)
1802                         p = Point(width_, height_);
1803                 bool const in_texted = cur.inTexted();
1804                 cur.setCursor(doc_iterator_begin(cur.buffer()));
1805                 cur.selHandle(false);
1806                 // Force an immediate computation of metrics because we need it below
1807                 processUpdateFlags(Update::Force);
1808
1809                 d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_,
1810                         true, act == LFUN_SCREEN_UP);
1811                 //FIXME: what to do with cur.x_target()?
1812                 bool update = in_texted && cur.bv().checkDepm(cur, old);
1813                 cur.finishUndo();
1814
1815                 if (update || cur.mark())
1816                         dr.screenUpdate(Update::Force | Update::FitCursor);
1817                 if (update)
1818                         dr.forceBufferUpdate();
1819                 break;
1820         }
1821
1822         case LFUN_SCROLL: {
1823                 string const scroll_type = cmd.getArg(0);
1824                 int scroll_step = 0;
1825                 if (scroll_type == "line")
1826                         scroll_step = d->scrollbarParameters_.single_step;
1827                 else if (scroll_type == "page")
1828                         scroll_step = d->scrollbarParameters_.page_step;
1829                 else
1830                         return;
1831                 string const scroll_quantity = cmd.getArg(1);
1832                 if (scroll_quantity == "up")
1833                         scrollUp(scroll_step);
1834                 else if (scroll_quantity == "down")
1835                         scrollDown(scroll_step);
1836                 else {
1837                         int const scroll_value = convert<int>(scroll_quantity);
1838                         if (scroll_value)
1839                                 scroll(scroll_step * scroll_value);
1840                 }
1841                 dr.screenUpdate(Update::ForceDraw);
1842                 dr.forceBufferUpdate();
1843                 break;
1844         }
1845
1846         case LFUN_SCREEN_UP_SELECT: {
1847                 // FIXME: why is the algorithm different from LFUN_SCREEN_UP?
1848                 cur.selHandle(true);
1849                 if (isTopScreen()) {
1850                         lyx::dispatch(FuncRequest(LFUN_BUFFER_BEGIN_SELECT));
1851                         cur.finishUndo();
1852                         break;
1853                 }
1854                 int y = getPos(cur).y_;
1855                 int const ymin = y - height_ + defaultRowHeight();
1856                 while (y > ymin && cur.up())
1857                         y = getPos(cur).y_;
1858
1859                 cur.finishUndo();
1860                 dr.screenUpdate(Update::SinglePar | Update::FitCursor);
1861                 break;
1862         }
1863
1864         case LFUN_SCREEN_DOWN_SELECT: {
1865                 // FIXME: why is the algorithm different from LFUN_SCREEN_DOWN?
1866                 cur.selHandle(true);
1867                 if (isBottomScreen()) {
1868                         lyx::dispatch(FuncRequest(LFUN_BUFFER_END_SELECT));
1869                         cur.finishUndo();
1870                         break;
1871                 }
1872                 int y = getPos(cur).y_;
1873                 int const ymax = y + height_ - defaultRowHeight();
1874                 while (y < ymax && cur.down())
1875                         y = getPos(cur).y_;
1876
1877                 cur.finishUndo();
1878                 dr.screenUpdate(Update::SinglePar | Update::FitCursor);
1879                 break;
1880         }
1881
1882
1883         case LFUN_INSET_SELECT_ALL: {
1884                 // true if all cells are selected
1885                 bool const all_selected = cur.depth() > 1
1886                     && cur.selBegin().at_begin()
1887                     && cur.selEnd().at_end();
1888                 // true if some cells are selected
1889                 bool const cells_selected = cur.depth() > 1
1890                     && cur.selBegin().at_cell_begin()
1891                         && cur.selEnd().at_cell_end();
1892                 if (all_selected || (cells_selected && !cur.inset().isTable())) {
1893                         // All the contents of the inset if selected, or only at
1894                         // least one cell but inset is not a table.
1895                         // Select the inset from outside.
1896                         cur.pop();
1897                         cur.resetAnchor();
1898                         cur.selection(true);
1899                         cur.posForward();
1900                 } else if (cells_selected) {
1901                         // At least one complete cell is selected and inset is a table.
1902                         // Select all cells
1903                         cur.idx() = 0;
1904                         cur.pos() = 0;
1905                         cur.resetAnchor();
1906                         cur.selection(true);
1907                         cur.idx() = cur.lastidx();
1908                         cur.pos() = cur.lastpos();
1909                 } else {
1910                         // select current cell
1911                         cur.pit() = 0;
1912                         cur.pos() = 0;
1913                         cur.resetAnchor();
1914                         cur.selection(true);
1915                         cur.pit() = cur.lastpit();
1916                         cur.pos() = cur.lastpos();
1917                 }
1918                 cur.setCurrentFont();
1919                 dr.screenUpdate(Update::Force);
1920                 break;
1921         }
1922
1923
1924         case LFUN_UNICODE_INSERT: {
1925                 if (cmd.argument().empty())
1926                         break;
1927
1928                 FuncCode code = cur.inset().currentMode() == Inset::MATH_MODE ?
1929                         LFUN_MATH_INSERT : LFUN_SELF_INSERT;
1930                 int i = 0;
1931                 while (true) {
1932                         docstring const arg = from_utf8(cmd.getArg(i));
1933                         if (arg.empty())
1934                                 break;
1935                         if (!isHex(arg)) {
1936                                 LYXERR0("Not a hexstring: " << arg);
1937                                 ++i;
1938                                 continue;
1939                         }
1940                         char_type c = hexToInt(arg);
1941                         if (c >= 32 && c < 0x10ffff) {
1942                                 LYXERR(Debug::KEY, "Inserting c: " << c);
1943                                 lyx::dispatch(FuncRequest(code, docstring(1, c)));
1944                         }
1945                         ++i;
1946                 }
1947                 break;
1948         }
1949
1950
1951         // This would be in Buffer class if only Cursor did not
1952         // require a bufferview
1953         case LFUN_INSET_FORALL: {
1954                 docstring const name = from_utf8(cmd.getArg(0));
1955                 string const commandstr = cmd.getLongArg(1);
1956                 FuncRequest const fr = lyxaction.lookupFunc(commandstr);
1957
1958                 // an arbitrary number to limit number of iterations
1959                 const int max_iter = 100000;
1960                 int iterations = 0;
1961                 Cursor & curs = d->cursor_;
1962                 Cursor const savecur = curs;
1963                 curs.reset();
1964                 if (!curs.nextInset())
1965                         curs.forwardInset();
1966                 curs.beginUndoGroup();
1967                 while(curs && iterations < max_iter) {
1968                         Inset * const ins = curs.nextInset();
1969                         if (!ins)
1970                                 break;
1971                         docstring insname = ins->layoutName();
1972                         while (!insname.empty()) {
1973                                 if (insname == name || name == from_utf8("*")) {
1974                                         curs.recordUndo();
1975                                         lyx::dispatch(fr, dr);
1976                                         ++iterations;
1977                                         break;
1978                                 }
1979                                 size_t const i = insname.rfind(':');
1980                                 if (i == string::npos)
1981                                         break;
1982                                 insname = insname.substr(0, i);
1983                         }
1984                         // if we did not delete the inset, skip it
1985                         if (!curs.nextInset() || curs.nextInset() == ins)
1986                                 curs.forwardInset();
1987                 }
1988                 curs = savecur;
1989                 curs.fixIfBroken();
1990                 /** This is a dummy undo record only to remember the cursor
1991                  * that has just been set; this will be used on a redo action
1992                  * (see ticket #10097)
1993
1994                  * FIXME: a better fix would be to have a way to set the
1995                  * cursor value directly, but I am not sure it is worth it.
1996                  */
1997                 curs.recordUndo();
1998                 curs.endUndoGroup();
1999                 dr.screenUpdate(Update::Force);
2000                 dr.forceBufferUpdate();
2001
2002                 if (iterations >= max_iter) {
2003                         dr.setError(true);
2004                         dr.setMessage(bformat(_("`inset-forall' interrupted because number of actions is larger than %1$d"), max_iter));
2005                 } else
2006                         dr.setMessage(bformat(_("Applied \"%1$s\" to %2$d insets"), from_utf8(commandstr), iterations));
2007                 break;
2008         }
2009
2010
2011         case LFUN_BRANCH_ADD_INSERT: {
2012                 docstring branch_name = from_utf8(cmd.getArg(0));
2013                 if (branch_name.empty())
2014                         if (!Alert::askForText(branch_name, _("Branch name")) ||
2015                                                 branch_name.empty())
2016                                 break;
2017
2018                 DispatchResult drtmp;
2019                 buffer_.dispatch(FuncRequest(LFUN_BRANCH_ADD, branch_name), drtmp);
2020                 if (drtmp.error()) {
2021                         Alert::warning(_("Branch already exists"), drtmp.message());
2022                         break;
2023                 }
2024                 docstring const sep = buffer_.params().branchlist().separator();
2025                 for (docstring const & branch : getVectorFromString(branch_name, sep))
2026                         lyx::dispatch(FuncRequest(LFUN_BRANCH_INSERT, branch));
2027                 break;
2028         }
2029
2030         case LFUN_KEYMAP_OFF:
2031                 getIntl().keyMapOn(false);
2032                 break;
2033
2034         case LFUN_KEYMAP_PRIMARY:
2035                 getIntl().keyMapPrim();
2036                 break;
2037
2038         case LFUN_KEYMAP_SECONDARY:
2039                 getIntl().keyMapSec();
2040                 break;
2041
2042         case LFUN_KEYMAP_TOGGLE:
2043                 getIntl().toggleKeyMap();
2044                 break;
2045
2046         case LFUN_DIALOG_SHOW_NEW_INSET: {
2047                 string const name = cmd.getArg(0);
2048                 string data = trim(to_utf8(cmd.argument()).substr(name.size()));
2049                 if (decodeInsetParam(name, data, buffer_))
2050                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, name + " " + data));
2051                 else
2052                         lyxerr << "Inset type '" << name <<
2053                         "' not recognized in LFUN_DIALOG_SHOW_NEW_INSET" <<  endl;
2054                 break;
2055         }
2056
2057         case LFUN_CITATION_INSERT: {
2058                 if (argument.empty()) {
2059                         lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW_NEW_INSET, "citation"));
2060                         break;
2061                 }
2062                 // we can have one optional argument, delimited by '|'
2063                 // citation-insert <key>|<text_before>
2064                 // this should be enhanced to also support text_after
2065                 // and citation style
2066                 string arg = argument;
2067                 string opt1;
2068                 if (contains(argument, "|")) {
2069                         arg = token(argument, '|', 0);
2070                         opt1 = token(argument, '|', 1);
2071                 }
2072
2073                 // if our cursor is directly in front of or behind a citation inset,
2074                 // we will instead add the new key to it.
2075                 Inset * inset = cur.nextInset();
2076                 if (!inset || inset->lyxCode() != CITE_CODE)
2077                         inset = cur.prevInset();
2078                 if (inset && inset->lyxCode() == CITE_CODE) {
2079                         InsetCitation * icite = static_cast<InsetCitation *>(inset);
2080                         if (icite->addKey(arg)) {
2081                                 dr.forceBufferUpdate();
2082                                 dr.screenUpdate(Update::FitCursor | Update::SinglePar);
2083                                 if (!opt1.empty())
2084                                         LYXERR0("Discarding optional argument to citation-insert.");
2085                         }
2086                         dispatched = true;
2087                         break;
2088                 }
2089                 InsetCommandParams icp(CITE_CODE);
2090                 icp["key"] = from_utf8(arg);
2091                 if (!opt1.empty())
2092                         icp["before"] = from_utf8(opt1);
2093                 icp["literal"] = 
2094                         from_ascii(InsetCitation::last_literal ? "true" : "false");
2095                 string icstr = InsetCommand::params2string(icp);
2096                 FuncRequest fr(LFUN_INSET_INSERT, icstr);
2097                 lyx::dispatch(fr);
2098                 break;
2099         }
2100
2101         case LFUN_INSET_APPLY: {
2102                 string const name = cmd.getArg(0);
2103                 Inset * inset = editedInset(name);
2104                 if (!inset) {
2105                         FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
2106                         lyx::dispatch(fr);
2107                         break;
2108                 }
2109                 // put cursor in front of inset.
2110                 if (!setCursorFromInset(inset)) {
2111                         LASSERT(false, break);
2112                 }
2113                 cur.recordUndo();
2114                 FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
2115                 inset->dispatch(cur, fr);
2116                 dr.screenUpdate(cur.result().screenUpdate());
2117                 if (cur.result().needBufferUpdate())
2118                         dr.forceBufferUpdate();
2119                 break;
2120         }
2121
2122         // FIXME:
2123         // The change of language of buffer belongs to the Buffer class.
2124         // We have to do it here because we need a cursor for Undo.
2125         // When Undo::recordUndoBufferParams() is implemented someday
2126         // LFUN_BUFFER_LANGUAGE should be handled by the Buffer class.
2127         case LFUN_BUFFER_LANGUAGE: {
2128                 Language const * oldL = buffer_.params().language;
2129                 Language const * newL = languages.getLanguage(argument);
2130                 if (!newL || oldL == newL)
2131                         break;
2132                 if (oldL->rightToLeft() == newL->rightToLeft()) {
2133                         cur.recordUndoFullBuffer();
2134                         buffer_.changeLanguage(oldL, newL);
2135                         cur.setCurrentFont();
2136                         dr.forceBufferUpdate();
2137                 }
2138                 break;
2139         }
2140
2141         case LFUN_FILE_INSERT_PLAINTEXT_PARA:
2142         case LFUN_FILE_INSERT_PLAINTEXT: {
2143                 bool const as_paragraph = (act == LFUN_FILE_INSERT_PLAINTEXT_PARA);
2144                 string const fname = to_utf8(cmd.argument());
2145                 if (!FileName::isAbsolute(fname))
2146                         dr.setMessage(_("Absolute filename expected."));
2147                 else
2148                         insertPlaintextFile(FileName(fname), as_paragraph);
2149                 break;
2150         }
2151
2152         default:
2153                 // OK, so try the Buffer itself...
2154                 buffer_.dispatch(cmd, dr);
2155                 dispatched = dr.dispatched();
2156                 break;
2157         }
2158
2159         buffer_.undo().endUndoGroup();
2160         dr.dispatched(dispatched);
2161
2162         // NOTE: The code below is copied from Cursor::dispatch. If you
2163         // need to modify this, please update the other one too.
2164
2165         // notify insets we just entered/left
2166         if (cursor() != old) {
2167                 old.beginUndoGroup();
2168                 old.fixIfBroken();
2169                 bool badcursor = notifyCursorLeavesOrEnters(old, cursor());
2170                 if (badcursor) {
2171                         cursor().fixIfBroken();
2172                         resetInlineCompletionPos();
2173                 }
2174                 old.endUndoGroup();
2175         }
2176 }
2177
2178
2179 docstring const BufferView::requestSelection()
2180 {
2181         Cursor & cur = d->cursor_;
2182
2183         LYXERR(Debug::SELECTION, "requestSelection: cur.selection: " << cur.selection());
2184         if (!cur.selection()) {
2185                 d->xsel_cache_.set = false;
2186                 return docstring();
2187         }
2188
2189         LYXERR(Debug::SELECTION, "requestSelection: xsel_cache.set: " << d->xsel_cache_.set);
2190         if (!d->xsel_cache_.set ||
2191             cur.top() != d->xsel_cache_.cursor ||
2192             cur.realAnchor().top() != d->xsel_cache_.anchor)
2193         {
2194                 d->xsel_cache_.cursor = cur.top();
2195                 d->xsel_cache_.anchor = cur.realAnchor().top();
2196                 d->xsel_cache_.set = cur.selection();
2197                 return cur.selectionAsString(false);
2198         }
2199         return docstring();
2200 }
2201
2202
2203 void BufferView::clearSelection()
2204 {
2205         d->cursor_.clearSelection();
2206         // Clear the selection buffer. Otherwise a subsequent
2207         // middle-mouse-button paste would use the selection buffer,
2208         // not the more current external selection.
2209         cap::clearSelection();
2210         d->xsel_cache_.set = false;
2211         // The buffer did not really change, but this causes the
2212         // redraw we need because we cleared the selection above.
2213         buffer_.changed(false);
2214 }
2215
2216
2217 void BufferView::resize(int width, int height)
2218 {
2219         // Update from work area
2220         width_ = width;
2221         height_ = height;
2222
2223         // Clear the paragraph height cache.
2224         d->par_height_.clear();
2225         // Redo the metrics.
2226         updateMetrics();
2227 }
2228
2229
2230 Inset const * BufferView::getCoveringInset(Text const & text,
2231                 int x, int y) const
2232 {
2233         TextMetrics & tm = d->text_metrics_[&text];
2234         Inset * inset = tm.checkInsetHit(x, y);
2235         if (!inset)
2236                 return 0;
2237
2238         if (!inset->descendable(*this))
2239                 // No need to go further down if the inset is not
2240                 // descendable.
2241                 return inset;
2242
2243         size_t cell_number = inset->nargs();
2244         // Check all the inner cell.
2245         for (size_t i = 0; i != cell_number; ++i) {
2246                 Text const * inner_text = inset->getText(i);
2247                 if (inner_text) {
2248                         // Try deeper.
2249                         Inset const * inset_deeper =
2250                                 getCoveringInset(*inner_text, x, y);
2251                         if (inset_deeper)
2252                                 return inset_deeper;
2253                 }
2254         }
2255
2256         return inset;
2257 }
2258
2259
2260 void BufferView::updateHoveredInset() const
2261 {
2262         // Get inset under mouse, if there is one.
2263         int const x = d->mouse_position_cache_.x_;
2264         int const y = d->mouse_position_cache_.y_;
2265         Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
2266
2267         d->clickable_inset_ = covering_inset && covering_inset->clickable(*this, x, y);
2268
2269         if (covering_inset == d->last_inset_)
2270                 // Same inset, no need to do anything...
2271                 return;
2272
2273         bool need_redraw = false;
2274         if (d->last_inset_) {
2275                 // Remove the hint on the last hovered inset (if any).
2276                 need_redraw |= d->last_inset_->setMouseHover(this, false);
2277                 d->last_inset_ = 0;
2278         }
2279
2280         if (covering_inset && covering_inset->setMouseHover(this, true)) {
2281                 need_redraw = true;
2282                 // Only the insets that accept the hover state, do
2283                 // clear the last_inset_, so only set the last_inset_
2284                 // member if the hovered setting is accepted.
2285                 d->last_inset_ = covering_inset;
2286         }
2287
2288         if (need_redraw) {
2289                 LYXERR(Debug::PAINTING, "Mouse hover detected at: ("
2290                                 << d->mouse_position_cache_.x_ << ", "
2291                                 << d->mouse_position_cache_.y_ << ")");
2292
2293                 d->update_strategy_ = DecorationUpdate;
2294
2295                 // This event (moving without mouse click) is not passed further.
2296                 // This should be changed if it is further utilized.
2297                 buffer_.changed(false);
2298         }
2299 }
2300
2301
2302 void BufferView::clearLastInset(Inset * inset) const
2303 {
2304         if (d->last_inset_ != inset) {
2305                 LYXERR0("Wrong last_inset!");
2306                 LATTEST(false);
2307         }
2308         d->last_inset_ = 0;
2309 }
2310
2311
2312 void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
2313 {
2314         //lyxerr << "[ cmd0 " << cmd0 << "]" << endl;
2315
2316         // This is only called for mouse related events including
2317         // LFUN_FILE_OPEN generated by drag-and-drop.
2318         FuncRequest cmd = cmd0;
2319
2320         Cursor old = cursor();
2321         Cursor cur(*this);
2322         cur.push(buffer_.inset());
2323         cur.selection(d->cursor_.selection());
2324
2325         // Either the inset under the cursor or the
2326         // surrounding Text will handle this event.
2327
2328         // make sure we stay within the screen...
2329         cmd.set_y(min(max(cmd.y(), -1), height_));
2330
2331         d->mouse_position_cache_.x_ = cmd.x();
2332         d->mouse_position_cache_.y_ = cmd.y();
2333
2334         if (cmd.action() == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
2335                 updateHoveredInset();
2336                 return;
2337         }
2338
2339         // Build temporary cursor.
2340         Inset * inset = d->text_metrics_[&buffer_.text()].editXY(cur, cmd.x(), cmd.y());
2341         if (inset) {
2342                 // If inset is not editable, cur.pos() might point behind the
2343                 // inset (depending on cmd.x(), cmd.y()). This is needed for
2344                 // editing to fix bug 9628, but e.g. the context menu needs a
2345                 // cursor in front of the inset.
2346                 if ((inset->hasSettings() || !inset->contextMenuName().empty()
2347                      || inset->lyxCode() == SEPARATOR_CODE) &&
2348                     cur.nextInset() != inset && cur.prevInset() == inset)
2349                         cur.posBackward();
2350         } else if (cur.inTexted() && cur.pos()
2351                         && cur.paragraph().isEnvSeparator(cur.pos() - 1)) {
2352                 // Always place cursor in front of a separator inset.
2353                 cur.posBackward();
2354         }
2355
2356         // Put anchor at the same position.
2357         cur.resetAnchor();
2358
2359         cur.beginUndoGroup();
2360
2361         // Try to dispatch to an non-editable inset near this position
2362         // via the temp cursor. If the inset wishes to change the real
2363         // cursor it has to do so explicitly by using
2364         //  cur.bv().cursor() = cur;  (or similar)
2365         if (inset)
2366                 inset->dispatch(cur, cmd);
2367
2368         // Now dispatch to the temporary cursor. If the real cursor should
2369         // be modified, the inset's dispatch has to do so explicitly.
2370         if (!inset || !cur.result().dispatched())
2371                 cur.dispatch(cmd);
2372
2373         // Notify left insets
2374         if (cur != old) {
2375                 bool badcursor = old.fixIfBroken() | cur.fixIfBroken();
2376                 badcursor |= notifyCursorLeavesOrEnters(old, cur);
2377                 if (badcursor)
2378                         cursor().fixIfBroken();
2379         }
2380
2381         cur.endUndoGroup();
2382
2383         // Do we have a selection?
2384         theSelection().haveSelection(cursor().selection());
2385
2386         if (cur.needBufferUpdate()) {
2387                 cur.clearBufferUpdate();
2388                 buffer().updateBuffer();
2389         }
2390
2391         // If the command has been dispatched,
2392         if (cur.result().dispatched() || cur.result().screenUpdate())
2393                 processUpdateFlags(cur.result().screenUpdate());
2394 }
2395
2396
2397 int BufferView::minVisiblePart()
2398 {
2399         return 2 * defaultRowHeight();
2400 }
2401
2402
2403 int BufferView::scroll(int y)
2404 {
2405         if (y > 0)
2406                 return scrollDown(y);
2407         if (y < 0)
2408                 return scrollUp(-y);
2409         return 0;
2410 }
2411
2412
2413 int BufferView::scrollDown(int offset)
2414 {
2415         Text * text = &buffer_.text();
2416         TextMetrics & tm = d->text_metrics_[text];
2417         int const ymax = height_ + offset;
2418         while (true) {
2419                 pair<pit_type, ParagraphMetrics const *> last = tm.last();
2420                 int bottom_pos = last.second->position() + last.second->descent();
2421                 if (lyxrc.scroll_below_document)
2422                         bottom_pos += height_ - minVisiblePart();
2423                 if (last.first + 1 == int(text->paragraphs().size())) {
2424                         if (bottom_pos <= height_)
2425                                 return 0;
2426                         offset = min(offset, bottom_pos - height_);
2427                         break;
2428                 }
2429                 if (bottom_pos > ymax)
2430                         break;
2431                 tm.newParMetricsDown();
2432         }
2433         d->anchor_ypos_ -= offset;
2434         return -offset;
2435 }
2436
2437
2438 int BufferView::scrollUp(int offset)
2439 {
2440         Text * text = &buffer_.text();
2441         TextMetrics & tm = d->text_metrics_[text];
2442         int ymin = - offset;
2443         while (true) {
2444                 pair<pit_type, ParagraphMetrics const *> first = tm.first();
2445                 int top_pos = first.second->position() - first.second->ascent();
2446                 if (first.first == 0) {
2447                         if (top_pos >= 0)
2448                                 return 0;
2449                         offset = min(offset, - top_pos);
2450                         break;
2451                 }
2452                 if (top_pos < ymin)
2453                         break;
2454                 tm.newParMetricsUp();
2455         }
2456         d->anchor_ypos_ += offset;
2457         return offset;
2458 }
2459
2460
2461 bool BufferView::setCursorFromRow(int row)
2462 {
2463         TexRow::TextEntry start, end;
2464         tie(start,end) = buffer_.texrow().getEntriesFromRow(row);
2465         LYXERR(Debug::LATEX,
2466                "setCursorFromRow: for row " << row << ", TexRow has found "
2467                "start (id=" << start.id << ",pos=" << start.pos << "), "
2468                "end (id=" << end.id << ",pos=" << end.pos << ")");
2469         return setCursorFromEntries(start, end);
2470 }
2471
2472
2473 bool BufferView::setCursorFromEntries(TexRow::TextEntry start,
2474                                       TexRow::TextEntry end)
2475 {
2476         DocIterator dit_start, dit_end;
2477         tie(dit_start,dit_end) =
2478                 TexRow::getDocIteratorsFromEntries(start, end, buffer_);
2479         if (!dit_start)
2480                 return false;
2481         // Setting selection start
2482         d->cursor_.clearSelection();
2483         setCursor(dit_start);
2484         // Setting selection end
2485         if (dit_end) {
2486                 d->cursor_.resetAnchor();
2487                 setCursorSelectionTo(dit_end);
2488         }
2489         return true;
2490 }
2491
2492
2493 bool BufferView::setCursorFromInset(Inset const * inset)
2494 {
2495         // are we already there?
2496         if (cursor().nextInset() == inset)
2497                 return true;
2498
2499         // Inset is not at cursor position. Find it in the document.
2500         Cursor cur(*this);
2501         cur.reset();
2502         while (cur && cur.nextInset() != inset)
2503                 cur.forwardInset();
2504
2505         if (cur) {
2506                 setCursor(cur);
2507                 return true;
2508         }
2509         return false;
2510 }
2511
2512
2513 void BufferView::gotoLabel(docstring const & label)
2514 {
2515         for (Buffer const * buf : buffer().allRelatives()) {
2516                 // find label
2517                 for (TocItem const & item : *buf->tocBackend().toc("label")) {
2518                         if (label == item.str()) {
2519                                 lyx::dispatch(item.action());
2520                                 return;
2521                         }
2522                 }
2523         }
2524 }
2525
2526
2527 TextMetrics const & BufferView::textMetrics(Text const * t) const
2528 {
2529         return const_cast<BufferView *>(this)->textMetrics(t);
2530 }
2531
2532
2533 TextMetrics & BufferView::textMetrics(Text const * t)
2534 {
2535         LBUFERR(t);
2536         TextMetricsCache::iterator tmc_it  = d->text_metrics_.find(t);
2537         if (tmc_it == d->text_metrics_.end()) {
2538                 tmc_it = d->text_metrics_.insert(
2539                         make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
2540         }
2541         return tmc_it->second;
2542 }
2543
2544
2545 ParagraphMetrics const & BufferView::parMetrics(Text const * t,
2546                 pit_type pit) const
2547 {
2548         return textMetrics(t).parMetrics(pit);
2549 }
2550
2551
2552 int BufferView::workHeight() const
2553 {
2554         return height_;
2555 }
2556
2557
2558 void BufferView::setCursor(DocIterator const & dit)
2559 {
2560         d->cursor_.reset();
2561         size_t const n = dit.depth();
2562         for (size_t i = 0; i < n; ++i)
2563                 dit[i].inset().edit(d->cursor_, true);
2564
2565         d->cursor_.setCursor(dit);
2566         d->cursor_.selection(false);
2567         d->cursor_.setCurrentFont();
2568         // FIXME
2569         // It seems on general grounds as if this is probably needed, but
2570         // it is not yet clear.
2571         // See bug #7394 and r38388.
2572         // d->cursor.resetAnchor();
2573 }
2574
2575
2576 void BufferView::setCursorSelectionTo(DocIterator const & dit)
2577 {
2578         size_t const n = dit.depth();
2579         for (size_t i = 0; i < n; ++i)
2580                 dit[i].inset().edit(d->cursor_, true);
2581
2582         d->cursor_.selection(true);
2583         d->cursor_.setCursorSelectionTo(dit);
2584         d->cursor_.setCurrentFont();
2585 }
2586
2587
2588 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
2589 {
2590         // Would be wrong to delete anything if we have a selection.
2591         if (cur.selection())
2592                 return false;
2593
2594         bool need_anchor_change = false;
2595         bool changed = d->cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
2596                 need_anchor_change);
2597
2598         if (need_anchor_change)
2599                 cur.resetAnchor();
2600
2601         if (!changed)
2602                 return false;
2603
2604         d->cursor_ = cur;
2605
2606         // we would rather not do this here, but it needs to be done before
2607         // the changed() signal is sent.
2608         buffer_.updateBuffer();
2609
2610         buffer_.changed(true);
2611         return true;
2612 }
2613
2614
2615 bool BufferView::mouseSetCursor(Cursor & cur, bool const select)
2616 {
2617         LASSERT(&cur.bv() == this, return false);
2618
2619         if (!select)
2620                 // this event will clear selection so we save selection for
2621                 // persistent selection
2622                 cap::saveSelection(cursor());
2623
2624         d->cursor_.macroModeClose();
2625         // If a macro has been finalized, the cursor might have been broken
2626         cur.fixIfBroken();
2627
2628         // Has the cursor just left the inset?
2629         bool const leftinset = (&d->cursor_.inset() != &cur.inset());
2630         if (leftinset)
2631                 d->cursor_.fixIfBroken();
2632
2633         // do the dEPM magic if needed
2634         // FIXME: (1) move this to InsetText::notifyCursorLeaves?
2635         // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
2636         // the leftinset bool would not be necessary (badcursor instead).
2637         bool update = leftinset;
2638
2639         if (select) {
2640                 d->cursor_.setSelection();
2641                 d->cursor_.setCursorSelectionTo(cur);
2642         } else {
2643                 if (d->cursor_.inTexted())
2644                         update |= checkDepm(cur, d->cursor_);
2645                 d->cursor_.resetAnchor();
2646                 d->cursor_.setCursor(cur);
2647                 d->cursor_.clearSelection();
2648         }
2649         d->cursor_.boundary(cur.boundary());
2650         d->cursor_.finishUndo();
2651         d->cursor_.setCurrentFont();
2652         if (update)
2653                 cur.forceBufferUpdate();
2654         return update;
2655 }
2656
2657
2658 void BufferView::putSelectionAt(DocIterator const & cur,
2659                                 int length, bool backwards)
2660 {
2661         d->cursor_.clearSelection();
2662
2663         setCursor(cur);
2664
2665         if (length) {
2666                 if (backwards) {
2667                         d->cursor_.pos() += length;
2668                         d->cursor_.setSelection(d->cursor_, -length);
2669                 } else
2670                         d->cursor_.setSelection(d->cursor_, length);
2671         }
2672 }
2673
2674
2675 bool BufferView::selectIfEmpty(DocIterator & cur)
2676 {
2677         if ((cur.inTexted() && !cur.paragraph().empty())
2678             || (cur.inMathed() && !cur.cell().empty()))
2679                 return false;
2680
2681         pit_type const beg_pit = cur.pit();
2682         if (beg_pit > 0) {
2683                 // The paragraph associated to this item isn't
2684                 // the first one, so it can be selected
2685                 cur.backwardPos();
2686         } else {
2687                 // We have to resort to select the space between the
2688                 // end of this item and the begin of the next one
2689                 cur.forwardPos();
2690         }
2691         if (cur.empty()) {
2692                 // If it is the only item in the document,
2693                 // nothing can be selected
2694                 return false;
2695         }
2696         pit_type const end_pit = cur.pit();
2697         pos_type const end_pos = cur.pos();
2698         d->cursor_.clearSelection();
2699         d->cursor_.reset();
2700         d->cursor_.setCursor(cur);
2701         d->cursor_.pit() = beg_pit;
2702         d->cursor_.pos() = 0;
2703         d->cursor_.selection(false);
2704         d->cursor_.resetAnchor();
2705         d->cursor_.pit() = end_pit;
2706         d->cursor_.pos() = end_pos;
2707         d->cursor_.setSelection();
2708         return true;
2709 }
2710
2711
2712 Cursor & BufferView::cursor()
2713 {
2714         return d->cursor_;
2715 }
2716
2717
2718 Cursor const & BufferView::cursor() const
2719 {
2720         return d->cursor_;
2721 }
2722
2723
2724 bool BufferView::singleParUpdate()
2725 {
2726         Text & buftext = buffer_.text();
2727         pit_type const bottom_pit = d->cursor_.bottom().pit();
2728         TextMetrics & tm = textMetrics(&buftext);
2729         int old_height = tm.parMetrics(bottom_pit).height();
2730
2731         // make sure inline completion pointer is ok
2732         if (d->inlineCompletionPos_.fixIfBroken())
2733                 d->inlineCompletionPos_ = DocIterator();
2734
2735         // In Single Paragraph mode, rebreak only
2736         // the (main text, not inset!) paragraph containing the cursor.
2737         // (if this paragraph contains insets etc., rebreaking will
2738         // recursively descend)
2739         tm.redoParagraph(bottom_pit);
2740         ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
2741         if (pm.height() != old_height)
2742                 // Paragraph height has changed so we cannot proceed to
2743                 // the singlePar optimisation.
2744                 return false;
2745
2746         tm.updatePosCache(bottom_pit);
2747
2748         LYXERR(Debug::PAINTING, "\ny1: " << pm.position() - pm.ascent()
2749                 << " y2: " << pm.position() + pm.descent()
2750                 << " pit: " << bottom_pit
2751                 << " singlepar: 1");
2752         return true;
2753 }
2754
2755
2756 void BufferView::updateMetrics()
2757 {
2758         updateMetrics(d->update_flags_);
2759         d->update_strategy_ = FullScreenUpdate;
2760 }
2761
2762
2763 void BufferView::updateMetrics(Update::flags & update_flags)
2764 {
2765         if (height_ == 0 || width_ == 0)
2766                 return;
2767
2768         Text & buftext = buffer_.text();
2769         pit_type const npit = int(buftext.paragraphs().size());
2770
2771         // Clear out the position cache in case of full screen redraw,
2772         d->coord_cache_.clear();
2773
2774         // Clear out paragraph metrics to avoid having invalid metrics
2775         // in the cache from paragraphs not relayouted below
2776         // The complete text metrics will be redone.
2777         d->text_metrics_.clear();
2778
2779         TextMetrics & tm = textMetrics(&buftext);
2780
2781         // make sure inline completion pointer is ok
2782         if (d->inlineCompletionPos_.fixIfBroken())
2783                 d->inlineCompletionPos_ = DocIterator();
2784
2785         if (d->anchor_pit_ >= npit)
2786                 // The anchor pit must have been deleted...
2787                 d->anchor_pit_ = npit - 1;
2788
2789         // Rebreak anchor paragraph.
2790         tm.redoParagraph(d->anchor_pit_);
2791         ParagraphMetrics & anchor_pm = tm.par_metrics_[d->anchor_pit_];
2792
2793         // position anchor
2794         if (d->anchor_pit_ == 0) {
2795                 int scrollRange = d->scrollbarParameters_.max - d->scrollbarParameters_.min;
2796
2797                 // Complete buffer visible? Then it's easy.
2798                 if (scrollRange == 0)
2799                         d->anchor_ypos_ = anchor_pm.ascent();
2800                 else {
2801                         // avoid empty space above the first row
2802                         d->anchor_ypos_ = min(d->anchor_ypos_, anchor_pm.ascent());
2803                 }
2804         }
2805         anchor_pm.setPosition(d->anchor_ypos_);
2806         tm.updatePosCache(d->anchor_pit_);
2807
2808         LYXERR(Debug::PAINTING, "metrics: "
2809                 << " anchor pit = " << d->anchor_pit_
2810                 << " anchor ypos = " << d->anchor_ypos_);
2811
2812         // Redo paragraphs above anchor if necessary.
2813         int y1 = d->anchor_ypos_ - anchor_pm.ascent();
2814         // We are now just above the anchor paragraph.
2815         pit_type pit1 = d->anchor_pit_ - 1;
2816         for (; pit1 >= 0 && y1 >= 0; --pit1) {
2817                 tm.redoParagraph(pit1);
2818                 ParagraphMetrics & pm = tm.par_metrics_[pit1];
2819                 y1 -= pm.descent();
2820                 // Save the paragraph position in the cache.
2821                 pm.setPosition(y1);
2822                 tm.updatePosCache(pit1);
2823                 y1 -= pm.ascent();
2824         }
2825
2826         // Redo paragraphs below the anchor if necessary.
2827         int y2 = d->anchor_ypos_ + anchor_pm.descent();
2828         // We are now just below the anchor paragraph.
2829         pit_type pit2 = d->anchor_pit_ + 1;
2830         for (; pit2 < npit && y2 <= height_; ++pit2) {
2831                 tm.redoParagraph(pit2);
2832                 ParagraphMetrics & pm = tm.par_metrics_[pit2];
2833                 y2 += pm.ascent();
2834                 // Save the paragraph position in the cache.
2835                 pm.setPosition(y2);
2836                 tm.updatePosCache(pit2);
2837                 y2 += pm.descent();
2838         }
2839
2840         LYXERR(Debug::PAINTING, "Metrics: "
2841                 << " anchor pit = " << d->anchor_pit_
2842                 << " anchor ypos = " << d->anchor_ypos_
2843                 << " y1 = " << y1
2844                 << " y2 = " << y2
2845                 << " pit1 = " << pit1
2846                 << " pit2 = " << pit2);
2847
2848         // metrics is done, full drawing is necessary now
2849         update_flags = (update_flags & ~Update::Force) | Update::ForceDraw;
2850
2851         // Now update the positions of insets in the cache.
2852         updatePosCache();
2853
2854         if (lyxerr.debugging(Debug::WORKAREA)) {
2855                 LYXERR(Debug::WORKAREA, "BufferView::updateMetrics");
2856                 d->coord_cache_.dump();
2857         }
2858 }
2859
2860
2861 void BufferView::updatePosCache()
2862 {
2863         // this is the "nodraw" drawing stage: only set the positions of the
2864         // insets in metrics cache.
2865         frontend::NullPainter np;
2866         draw(np, false);
2867 }
2868
2869
2870 void BufferView::insertLyXFile(FileName const & fname)
2871 {
2872         LASSERT(d->cursor_.inTexted(), return);
2873
2874         // Get absolute path of file and add ".lyx"
2875         // to the filename if necessary
2876         FileName filename = fileSearch(string(), fname.absFileName(), "lyx");
2877
2878         docstring const disp_fn = makeDisplayPath(filename.absFileName());
2879         // emit message signal.
2880         message(bformat(_("Inserting document %1$s..."), disp_fn));
2881
2882         docstring res;
2883         Buffer buf(filename.absFileName(), false);
2884         if (buf.loadLyXFile() == Buffer::ReadSuccess) {
2885                 ErrorList & el = buffer_.errorList("Parse");
2886                 // Copy the inserted document error list into the current buffer one.
2887                 el = buf.errorList("Parse");
2888                 buffer_.undo().recordUndo(d->cursor_);
2889                 cap::pasteParagraphList(d->cursor_, buf.paragraphs(),
2890                                              buf.params().documentClassPtr(), el);
2891                 res = _("Document %1$s inserted.");
2892         } else {
2893                 res = _("Could not insert document %1$s");
2894         }
2895
2896         buffer_.changed(true);
2897         // emit message signal.
2898         message(bformat(res, disp_fn));
2899 }
2900
2901
2902 Point BufferView::coordOffset(DocIterator const & dit) const
2903 {
2904         int x = 0;
2905         int y = 0;
2906         int lastw = 0;
2907
2908         // Addup contribution of nested insets, from inside to outside,
2909         // keeping the outer paragraph for a special handling below
2910         for (size_t i = dit.depth() - 1; i >= 1; --i) {
2911                 CursorSlice const & sl = dit[i];
2912                 int xx = 0;
2913                 int yy = 0;
2914
2915                 // get relative position inside sl.inset()
2916                 sl.inset().cursorPos(*this, sl, dit.boundary() && (i + 1 == dit.depth()), xx, yy);
2917
2918                 // Make relative position inside of the edited inset relative to sl.inset()
2919                 x += xx;
2920                 y += yy;
2921
2922                 // In case of an RTL inset, the edited inset will be positioned to the left
2923                 // of xx:yy
2924                 if (sl.text()) {
2925                         bool boundary_i = dit.boundary() && i + 1 == dit.depth();
2926                         bool rtl = textMetrics(sl.text()).isRTL(sl, boundary_i);
2927                         if (rtl)
2928                                 x -= lastw;
2929                 }
2930
2931                 // remember width for the case that sl.inset() is positioned in an RTL inset
2932                 lastw = sl.inset().dimension(*this).wid;
2933
2934                 //lyxerr << "Cursor::getPos, i: "
2935                 // << i << " x: " << xx << " y: " << y << endl;
2936         }
2937
2938         // Add contribution of initial rows of outermost paragraph
2939         CursorSlice const & sl = dit[0];
2940         TextMetrics const & tm = textMetrics(sl.text());
2941         ParagraphMetrics const & pm = tm.parMetrics(sl.pit());
2942
2943         LBUFERR(!pm.rows().empty());
2944         y -= pm.rows()[0].ascent();
2945 #if 1
2946         // FIXME: document this mess
2947         size_t rend;
2948         if (sl.pos() > 0 && dit.depth() == 1) {
2949                 int pos = sl.pos();
2950                 if (pos && dit.boundary())
2951                         --pos;
2952 //              lyxerr << "coordOffset: boundary:" << dit.boundary() << " depth:" << dit.depth() << " pos:" << pos << " sl.pos:" << sl.pos() << endl;
2953                 rend = pm.pos2row(pos);
2954         } else
2955                 rend = pm.pos2row(sl.pos());
2956 #else
2957         size_t rend = pm.pos2row(sl.pos());
2958 #endif
2959         for (size_t rit = 0; rit != rend; ++rit)
2960                 y += pm.rows()[rit].height();
2961         y += pm.rows()[rend].ascent();
2962
2963         TextMetrics const & bottom_tm = textMetrics(dit.bottom().text());
2964
2965         // Make relative position from the nested inset now bufferview absolute.
2966         int xx = bottom_tm.cursorX(dit.bottom(), dit.boundary() && dit.depth() == 1);
2967         x += xx;
2968
2969         // In the RTL case place the nested inset at the left of the cursor in
2970         // the outer paragraph
2971         bool boundary_1 = dit.boundary() && 1 == dit.depth();
2972         bool rtl = bottom_tm.isRTL(dit.bottom(), boundary_1);
2973         if (rtl)
2974                 x -= lastw;
2975
2976         return Point(x, y);
2977 }
2978
2979
2980 Point BufferView::getPos(DocIterator const & dit) const
2981 {
2982         if (!paragraphVisible(dit))
2983                 return Point(-1, -1);
2984
2985         CursorSlice const & bot = dit.bottom();
2986         TextMetrics const & tm = textMetrics(bot.text());
2987
2988         // offset from outer paragraph
2989         Point p = coordOffset(dit);
2990         p.y_ += tm.parMetrics(bot.pit()).position();
2991         return p;
2992 }
2993
2994
2995 bool BufferView::paragraphVisible(DocIterator const & dit) const
2996 {
2997         CursorSlice const & bot = dit.bottom();
2998         TextMetrics const & tm = textMetrics(bot.text());
2999
3000         return tm.contains(bot.pit());
3001 }
3002
3003
3004 void BufferView::setCaretAscentDescent(int asc, int des)
3005 {
3006         d->caret_ascent_ = asc;
3007         d->caret_descent_ = des;
3008 }
3009
3010
3011 void BufferView::caretPosAndHeight(Point & p, int & h) const
3012 {
3013         int asc, des;
3014         Cursor const & cur = cursor();
3015         if (cur.inMathed()) {
3016                 asc = d->caret_ascent_;
3017                 des = d->caret_descent_;
3018         } else {
3019                 Font const font = cur.real_current_font;
3020                 frontend::FontMetrics const & fm = theFontMetrics(font);
3021                 asc = fm.maxAscent();
3022                 des = fm.maxDescent();
3023         }
3024         h = asc + des;
3025         p = getPos(cur);
3026         p.y_ -= asc;
3027 }
3028
3029
3030 bool BufferView::cursorInView(Point const & p, int h) const
3031 {
3032         Cursor const & cur = cursor();
3033         // does the cursor touch the screen ?
3034         if (p.y_ + h < 0 || p.y_ >= workHeight() || !paragraphVisible(cur))
3035                 return false;
3036         return true;
3037 }
3038
3039
3040 int BufferView::horizScrollOffset() const
3041 {
3042         return d->horiz_scroll_offset_;
3043 }
3044
3045
3046 int BufferView::horizScrollOffset(Text const * text,
3047                                   pit_type pit, pos_type pos) const
3048 {
3049         // Is this a row that is currently scrolled?
3050         if (!d->current_row_slice_.empty()
3051             && &text->inset() == d->current_row_slice_.inset().asInsetText()
3052             && pit ==  d->current_row_slice_.pit()
3053             && pos ==  d->current_row_slice_.pos())
3054                 return d->horiz_scroll_offset_;
3055         return 0;
3056 }
3057
3058
3059 bool BufferView::hadHorizScrollOffset(Text const * text,
3060                                       pit_type pit, pos_type pos) const
3061 {
3062         return !d->last_row_slice_.empty()
3063                && &text->inset() == d->last_row_slice_.inset().asInsetText()
3064                && pit ==  d->last_row_slice_.pit()
3065                && pos ==  d->last_row_slice_.pos();
3066 }
3067
3068
3069 void BufferView::setCurrentRowSlice(CursorSlice const & rowSlice)
3070 {
3071         // nothing to do if the cursor was already on this row
3072         if (d->current_row_slice_ == rowSlice) {
3073                 d->last_row_slice_ = CursorSlice();
3074                 return;
3075         }
3076
3077         // if the (previous) current row was scrolled, we have to
3078         // remember it in order to repaint it next time.
3079         if (d->horiz_scroll_offset_ != 0)
3080                 d->last_row_slice_ = d->current_row_slice_;
3081         else
3082                 d->last_row_slice_ = CursorSlice();
3083
3084         // Since we changed row, the scroll offset is not valid anymore
3085         d->horiz_scroll_offset_ = 0;
3086         d->current_row_slice_ = rowSlice;
3087 }
3088
3089
3090 void BufferView::checkCursorScrollOffset()
3091 {
3092         CursorSlice rowSlice = d->cursor_.bottom();
3093         TextMetrics const & tm = textMetrics(rowSlice.text());
3094
3095         // Stop if metrics have not been computed yet, since it means
3096         // that there is nothing to do.
3097         if (!tm.contains(rowSlice.pit()))
3098                 return;
3099         ParagraphMetrics const & pm = tm.parMetrics(rowSlice.pit());
3100         Row const & row = pm.getRow(rowSlice.pos(),
3101                                     d->cursor_.boundary() && rowSlice == d->cursor_.top());
3102         rowSlice.pos() = row.pos();
3103
3104         // Set the row on which the cursor lives.
3105         setCurrentRowSlice(rowSlice);
3106
3107         // Current x position of the cursor in pixels
3108         int cur_x = getPos(d->cursor_).x_;
3109
3110         // Horizontal scroll offset of the cursor row in pixels
3111         int offset = d->horiz_scroll_offset_;
3112         int const MARGIN = 2 * theFontMetrics(d->cursor_.real_current_font).em()
3113                            + row.right_margin;
3114         if (row.right_x() <= workWidth() - row.right_margin) {
3115                 // Row is narrower than the work area, no offset needed.
3116                 offset = 0;
3117         } else {
3118                 if (cur_x - offset < MARGIN) {
3119                         // cursor would be too far right
3120                         offset = cur_x - MARGIN;
3121                 } else if (cur_x - offset > workWidth() - MARGIN) {
3122                         // cursor would be too far left
3123                         offset = cur_x - workWidth() + MARGIN;
3124                 }
3125                 // Correct the offset to make sure that we do not scroll too much
3126                 if (offset < 0)
3127                         offset = 0;
3128                 if (row.right_x() - offset < workWidth() - row.right_margin)
3129                         offset = row.right_x() - workWidth() + row.right_margin;
3130         }
3131
3132         //lyxerr << "cur_x=" << cur_x << ", offset=" << offset << ", row.wid=" << row.width() << ", margin=" << MARGIN << endl;
3133
3134         if (offset != d->horiz_scroll_offset_)
3135                 LYXERR(Debug::PAINTING, "Horiz. scroll offset changed from "
3136                        << d->horiz_scroll_offset_ << " to " << offset);
3137
3138         if (d->update_strategy_ == NoScreenUpdate
3139             && (offset != d->horiz_scroll_offset_
3140                 || !d->last_row_slice_.empty())) {
3141                 // FIXME: if one uses SingleParUpdate, then home/end
3142                 // will not work on long rows. Why?
3143                 d->update_strategy_ = FullScreenUpdate;
3144         }
3145
3146         d->horiz_scroll_offset_ = offset;
3147 }
3148
3149
3150 void BufferView::draw(frontend::Painter & pain, bool paint_caret)
3151 {
3152         if (height_ == 0 || width_ == 0)
3153                 return;
3154         LYXERR(Debug::PAINTING, (pain.isNull() ? "\t\t--- START NODRAW ---"
3155                                  : "\t\t*** START DRAWING ***"));
3156         Text & text = buffer_.text();
3157         TextMetrics const & tm = d->text_metrics_[&text];
3158         int const y = tm.first().second->position();
3159         PainterInfo pi(this, pain);
3160
3161         // Check whether the row where the cursor lives needs to be scrolled.
3162         // Update the drawing strategy if needed.
3163         checkCursorScrollOffset();
3164
3165         switch (d->update_strategy_) {
3166
3167         case NoScreenUpdate:
3168                 // no screen painting is actually needed. In nodraw stage
3169                 // however, the different coordinates of insets and paragraphs
3170                 // needs to be updated.
3171                 LYXERR(Debug::PAINTING, "Strategy: NoScreenUpdate");
3172                 pi.full_repaint = false;
3173                 if (pain.isNull()) {
3174                         pi.full_repaint = true;
3175                         tm.draw(pi, 0, y);
3176                 } else {
3177                         pi.full_repaint = false;
3178                         tm.draw(pi, 0, y);
3179                 }
3180                 break;
3181
3182         case SingleParUpdate:
3183                 pi.full_repaint = false;
3184                 LYXERR(Debug::PAINTING, "Strategy: SingleParUpdate");
3185                 // In general, only the current row of the outermost paragraph
3186                 // will be redrawn. Particular cases where selection spans
3187                 // multiple paragraph are correctly detected in TextMetrics.
3188                 tm.draw(pi, 0, y);
3189                 break;
3190
3191         case DecorationUpdate:
3192                 // FIXME: We should also distinguish DecorationUpdate to avoid text
3193                 // drawing if possible. This is not possible to do easily right now
3194                 // because of the single backing pixmap.
3195
3196         case FullScreenUpdate:
3197
3198                 LYXERR(Debug::PAINTING,
3199                        ((d->update_strategy_ == FullScreenUpdate)
3200                         ? "Strategy: FullScreenUpdate"
3201                         : "Strategy: DecorationUpdate"));
3202
3203                 // The whole screen, including insets, will be refreshed.
3204                 pi.full_repaint = true;
3205
3206                 // Clear background.
3207                 pain.fillRectangle(0, 0, width_, height_,
3208                         pi.backgroundColor(&buffer_.inset()));
3209
3210                 // Draw everything.
3211                 tm.draw(pi, 0, y);
3212
3213                 // and possibly grey out below
3214                 pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
3215                 int const y2 = lastpm.second->position() + lastpm.second->descent();
3216
3217                 if (y2 < height_) {
3218                         Color color = buffer().isInternal()
3219                                 ? Color_background : Color_bottomarea;
3220                         pain.fillRectangle(0, y2, width_, height_ - y2, color);
3221                 }
3222                 break;
3223         }
3224         LYXERR(Debug::PAINTING, (pain.isNull() ? "\t\t --- END NODRAW ---"
3225                                 : "\t\t *** END DRAWING ***"));
3226
3227         // The scrollbar needs an update.
3228         updateScrollbar();
3229
3230         // Normalize anchor for next time
3231         pair<pit_type, ParagraphMetrics const *> firstpm = tm.first();
3232         pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
3233         for (pit_type pit = firstpm.first; pit <= lastpm.first; ++pit) {
3234                 ParagraphMetrics const & pm = tm.parMetrics(pit);
3235                 if (pm.position() + pm.descent() > 0) {
3236                         if (d->anchor_pit_ != pit
3237                             || d->anchor_ypos_ != pm.position())
3238                                 LYXERR(Debug::PAINTING, "Found new anchor pit = " << d->anchor_pit_
3239                                        << "  anchor ypos = " << d->anchor_ypos_);
3240                         d->anchor_pit_ = pit;
3241                         d->anchor_ypos_ = pm.position();
3242                         break;
3243                 }
3244         }
3245         if (!pain.isNull()) {
3246                 // reset the update flags, everything has been done
3247                 d->update_flags_ = Update::None;
3248         }
3249
3250         // If a caret has to be painted, mark its text row as dirty to
3251         //make sure that it will be repainted on next redraw.
3252         /* FIXME: investigate whether this can be avoided when the cursor did not
3253          * move at all
3254          */
3255         if (paint_caret) {
3256                 Row const & caret_row = d->cursor_.textRow();
3257                 caret_row.changed(true);
3258         }
3259 }
3260
3261
3262 void BufferView::message(docstring const & msg)
3263 {
3264         if (d->gui_)
3265                 d->gui_->message(msg);
3266 }
3267
3268
3269 void BufferView::showDialog(string const & name)
3270 {
3271         if (d->gui_)
3272                 d->gui_->showDialog(name, string());
3273 }
3274
3275
3276 void BufferView::showDialog(string const & name,
3277         string const & data, Inset * inset)
3278 {
3279         if (d->gui_)
3280                 d->gui_->showDialog(name, data, inset);
3281 }
3282
3283
3284 void BufferView::updateDialog(string const & name, string const & data)
3285 {
3286         if (d->gui_)
3287                 d->gui_->updateDialog(name, data);
3288 }
3289
3290
3291 void BufferView::setGuiDelegate(frontend::GuiBufferViewDelegate * gui)
3292 {
3293         d->gui_ = gui;
3294 }
3295
3296
3297 // FIXME: Move this out of BufferView again
3298 docstring BufferView::contentsOfPlaintextFile(FileName const & fname)
3299 {
3300         if (!fname.isReadableFile()) {
3301                 docstring const error = from_ascii(strerror(errno));
3302                 docstring const file = makeDisplayPath(fname.absFileName(), 50);
3303                 docstring const text =
3304                   bformat(_("Could not read the specified document\n"
3305                             "%1$s\ndue to the error: %2$s"), file, error);
3306                 Alert::error(_("Could not read file"), text);
3307                 return docstring();
3308         }
3309
3310         if (!fname.isReadableFile()) {
3311                 docstring const file = makeDisplayPath(fname.absFileName(), 50);
3312                 docstring const text =
3313                   bformat(_("%1$s\n is not readable."), file);
3314                 Alert::error(_("Could not open file"), text);
3315                 return docstring();
3316         }
3317
3318         // FIXME UNICODE: We don't know the encoding of the file
3319         docstring file_content = fname.fileContents("UTF-8");
3320         if (file_content.empty()) {
3321                 Alert::error(_("Reading not UTF-8 encoded file"),
3322                              _("The file is not UTF-8 encoded.\n"
3323                                "It will be read as local 8Bit-encoded.\n"
3324                                "If this does not give the correct result\n"
3325                                "then please change the encoding of the file\n"
3326                                "to UTF-8 with a program other than LyX.\n"));
3327                 file_content = fname.fileContents("local8bit");
3328         }
3329
3330         return normalize_c(file_content);
3331 }
3332
3333
3334 void BufferView::insertPlaintextFile(FileName const & f, bool asParagraph)
3335 {
3336         docstring const tmpstr = contentsOfPlaintextFile(f);
3337
3338         if (tmpstr.empty())
3339                 return;
3340
3341         Cursor & cur = cursor();
3342         cap::replaceSelection(cur);
3343         buffer_.undo().recordUndo(cur);
3344         if (asParagraph)
3345                 cur.innerText()->insertStringAsParagraphs(cur, tmpstr, cur.current_font);
3346         else
3347                 cur.innerText()->insertStringAsLines(cur, tmpstr, cur.current_font);
3348
3349         buffer_.changed(true);
3350 }
3351
3352
3353 docstring const & BufferView::inlineCompletion() const
3354 {
3355         return d->inlineCompletion_;
3356 }
3357
3358
3359 size_t const & BufferView::inlineCompletionUniqueChars() const
3360 {
3361         return d->inlineCompletionUniqueChars_;
3362 }
3363
3364
3365 DocIterator const & BufferView::inlineCompletionPos() const
3366 {
3367         return d->inlineCompletionPos_;
3368 }
3369
3370
3371 void BufferView::resetInlineCompletionPos()
3372 {
3373         d->inlineCompletionPos_ = DocIterator();
3374 }
3375
3376
3377 bool samePar(DocIterator const & a, DocIterator const & b)
3378 {
3379         if (a.empty() && b.empty())
3380                 return true;
3381         if (a.empty() || b.empty())
3382                 return false;
3383         if (a.depth() != b.depth())
3384                 return false;
3385         return &a.innerParagraph() == &b.innerParagraph();
3386 }
3387
3388
3389 void BufferView::setInlineCompletion(Cursor const & cur, DocIterator const & pos,
3390         docstring const & completion, size_t uniqueChars)
3391 {
3392         uniqueChars = min(completion.size(), uniqueChars);
3393         bool changed = d->inlineCompletion_ != completion
3394                 || d->inlineCompletionUniqueChars_ != uniqueChars;
3395         bool singlePar = true;
3396         d->inlineCompletion_ = completion;
3397         d->inlineCompletionUniqueChars_ = min(completion.size(), uniqueChars);
3398
3399         //lyxerr << "setInlineCompletion pos=" << pos << " completion=" << completion << " uniqueChars=" << uniqueChars << std::endl;
3400
3401         // at new position?
3402         DocIterator const & old = d->inlineCompletionPos_;
3403         if (old != pos) {
3404                 //lyxerr << "inlineCompletionPos changed" << std::endl;
3405                 // old or pos are in another paragraph?
3406                 if ((!samePar(cur, pos) && !pos.empty())
3407                     || (!samePar(cur, old) && !old.empty())) {
3408                         singlePar = false;
3409                         //lyxerr << "different paragraph" << std::endl;
3410                 }
3411                 d->inlineCompletionPos_ = pos;
3412         }
3413
3414         // set update flags
3415         if (changed) {
3416                 if (singlePar && !(cur.result().screenUpdate() & Update::Force))
3417                         cur.screenUpdateFlags(cur.result().screenUpdate() | Update::SinglePar);
3418                 else
3419                         cur.screenUpdateFlags(cur.result().screenUpdate() | Update::Force);
3420         }
3421 }
3422
3423
3424 bool BufferView::clickableInset() const
3425 {
3426         return d->clickable_inset_;
3427 }
3428
3429 } // namespace lyx