]> git.lyx.org Git - lyx.git/blobdiff - src/BufferView.cpp
Fix some warnings
[lyx.git] / src / BufferView.cpp
index 27176b350a48f677b68d5a804bd3d561af0f2ecf..e31efcf673d433a52ab8efef42dca41d8335cb33 100644 (file)
@@ -110,7 +110,7 @@ T * getInsetByCode(Cursor const & cur, InsetCode code)
        Inset * inset = it.nextInset();
        if (inset && inset->lyxCode() == code)
                return static_cast<T*>(inset);
-       return 0;
+       return nullptr;
 }
 
 
@@ -230,15 +230,14 @@ enum ScreenUpdateStrategy {
 
 struct BufferView::Private
 {
-       Private(BufferView & bv) : update_strategy_(FullScreenUpdate),
+       Private(BufferView & bv) :
+               update_strategy_(FullScreenUpdate),
                update_flags_(Update::Force),
-               wh_(0), cursor_(bv),
-               anchor_pit_(0), anchor_ypos_(0),
-               inlineCompletionUniqueChars_(0),
-               last_inset_(0), clickable_inset_(false),
-               mouse_position_cache_(),
-               bookmark_edit_position_(-1), gui_(0),
-               horiz_scroll_offset_(0), repaint_caret_row_(false)
+               cursor_(bv), anchor_pit_(0), anchor_ypos_(0),
+               wh_(0), inlineCompletionUniqueChars_(0),
+               last_inset_(nullptr), mouse_position_cache_(),
+               gui_(nullptr), bookmark_edit_position_(-1),
+               horiz_scroll_offset_(0), clickable_inset_(false)
        {
                xsel_cache_.set = false;
        }
@@ -251,9 +250,10 @@ struct BufferView::Private
        Update::flags update_flags_;
        ///
        CoordCache coord_cache_;
+       ///
+       typedef map<MathData const *, MathRow> MathRows;
+       MathRows math_rows_;
 
-       /// Estimated average par height for scrollbar.
-       int wh_;
        /// this is used to handle XSelection events in the right manner.
        struct {
                CursorSlice cursor;
@@ -266,6 +266,8 @@ struct BufferView::Private
        pit_type anchor_pit_;
        ///
        int anchor_ypos_;
+       /// Estimated average par height for scrollbar.
+       int wh_;
        ///
        vector<int> par_height_;
 
@@ -284,17 +286,12 @@ struct BufferView::Private
          * Not owned, so don't delete.
          */
        Inset const * last_inset_;
-       /// are we hovering something that we can click
-       bool clickable_inset_;
 
        /// position of the mouse at the time of the last mouse move
        /// This is used to update the hovering status of inset in
        /// cases where the buffer is scrolled, but the mouse didn't move.
        Point mouse_position_cache_;
 
-       // cache for id of the paragraph which was edited the last time
-       int bookmark_edit_position_;
-
        mutable TextMetricsCache text_metrics_;
 
        /// Whom to notify.
@@ -310,19 +307,15 @@ struct BufferView::Private
 
        /// When the row where the cursor lies is scrolled, this
        /// contains the scroll offset
+       // cache for id of the paragraph which was edited the last time
+       int bookmark_edit_position_;
+
        int horiz_scroll_offset_;
        /// a slice pointing to the start of the row where the cursor
        /// is (at last draw time)
        CursorSlice current_row_slice_;
-       /// a slice pointing to the start of the row where cursor was
-       /// at previous draw event
-       CursorSlice last_row_slice_;
-
-       /// a slice pointing to where the cursor has been drawn after the current
-       /// draw() call.
-       CursorSlice caret_slice_;
-       /// indicates whether the caret slice needs to be repainted in this draw() run.
-       bool repaint_caret_row_;
+       /// are we hovering something that we can click
+       bool clickable_inset_;
 };
 
 
@@ -350,9 +343,10 @@ BufferView::~BufferView()
        // That is to say, if a cursor is in a nested inset, it will be
        // restore to the left of the top level inset.
        LastFilePosSection::FilePos fp;
+       fp.file = buffer_.fileName();
        fp.pit = d->cursor_.bottom().pit();
        fp.pos = d->cursor_.bottom().pos();
-       theSession().lastFilePos().save(buffer_.fileName(), fp);
+       theSession().lastFilePos().save(fp);
 
        if (d->last_inset_)
                d->last_inset_->setMouseHover(this, false);
@@ -438,6 +432,20 @@ CoordCache const & BufferView::coordCache() const
 }
 
 
+MathRow const & BufferView::mathRow(MathData const * cell) const
+{
+       auto it = d->math_rows_.find(cell);
+       LATTEST(it != d->math_rows_.end());
+       return it->second;
+}
+
+
+void BufferView::setMathRow(MathData const * cell, MathRow const & mrow)
+{
+       d->math_rows_[cell] = mrow;
+}
+
+
 Buffer & BufferView::buffer()
 {
        return buffer_;
@@ -475,7 +483,8 @@ string flagsAsString(Update::flags flags)
        return string((flags & Update::FitCursor) ? "FitCursor " : "")
                + ((flags & Update::Force) ? "Force " : "")
                + ((flags & Update::ForceDraw) ? "ForceDraw " : "")
-               + ((flags & Update::SinglePar) ? "SinglePar " : "");
+               + ((flags & Update::SinglePar) ? "SinglePar " : "")
+               + ((flags & Update::Decoration) ? "Decoration " : "");
 }
 
 }
@@ -489,10 +498,13 @@ void BufferView::processUpdateFlags(Update::flags flags)
        if (flags == Update::None)
                return;
 
-       // SinglePar is ignored for now (this should probably change). We
-       // set it ourselves below, at the price of always rebreaking the
-       // paragraph at cursor. This can be expensive for large tables.
-       flags = flags & ~Update::SinglePar;
+       /* FIXME We would like to avoid doing this here, since it is very
+        * expensive and is called in updateBuffer already. However, even
+        * inserting a plain character can invalidate the overly fragile
+        * tables of child documents built by updateMacros. Some work is
+        * needed to avoid doing that when not necessary.
+        */
+       buffer_.updateMacros();
 
        // First check whether the metrics and inset positions should be updated
        if (flags & Update::Force) {
@@ -501,31 +513,38 @@ void BufferView::processUpdateFlags(Update::flags flags)
                updateMetrics(flags);
        }
 
+       // Detect whether we can only repaint a single paragraph (if we
+       // are not already redrawing all).
+       // We handle this before FitCursor because the later will require
+       // correct metrics at cursor position.
+       if (!(flags & Update::ForceDraw)
+           && (flags & Update::SinglePar)
+               && !singleParUpdate())
+                       updateMetrics(flags);
+
        // Then make sure that the screen contains the cursor if needed
        if (flags & Update::FitCursor) {
                if (needsFitCursor()) {
-                       scrollToCursor(d->cursor_, false);
+                       // First try to make the selection start visible
+                       // (which is just the cursor when there is no selection)
+                       scrollToCursor(d->cursor_.selectionBegin(), false);
+                       // Is the cursor visible? (only useful if cursor is at end of selection)
+                       if (needsFitCursor())
+                               // then try to make cursor visible instead
+                               scrollToCursor(d->cursor_, false);
                        // Metrics have to be recomputed (maybe again)
                        updateMetrics(flags);
                }
                flags = flags & ~Update::FitCursor;
        }
 
-       // Finally detect whether we can only repaint a single paragraph
-       if (!(flags & Update::ForceDraw)) {
-               if (singleParUpdate())
-                       flags = flags | Update::SinglePar;
-               else
-                       updateMetrics(flags);
-       }
-
        // Add flags to the the update flags. These will be reset to None
        // after the redraw is actually done
        d->update_flags_ = d->update_flags_ | flags;
        LYXERR(Debug::PAINTING, "Cumulative flags: " << flagsAsString(flags));
 
        // Now compute the update strategy
-       // Possibly values in flag are None, Decoration, ForceDraw
+       // Possibly values in flag are None, SinglePar, Decoration, ForceDraw
        LATTEST((d->update_flags_ & ~(Update::None | Update::SinglePar
                                      | Update::Decoration | Update::ForceDraw)) == 0);
 
@@ -855,7 +874,7 @@ bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
                d->cursor_.setCurrentFont();
                // Do not forget to reset the anchor (see #9912)
                d->cursor_.resetAnchor();
-               processUpdateFlags(Update::FitCursor);
+               processUpdateFlags(Update::Force | Update::FitCursor);
        }
 
        return success;
@@ -943,7 +962,7 @@ bool BufferView::scrollToCursor(DocIterator const & dit, bool const recenter)
                int offset = coordOffset(dit).y_;
                int ypos = pm.position() + offset;
                Dimension const & row_dim =
-                       pm.getRow(cs.pos(), dit.boundary()).dimension();
+                       pm.getRow(cs.pos(), dit.boundary()).dim();
                int scrolled = 0;
                if (recenter)
                        scrolled = scroll(ypos - height_/2);
@@ -987,7 +1006,7 @@ bool BufferView::scrollToCursor(DocIterator const & dit, bool const recenter)
        d->anchor_pit_ = bot_pit;
        CursorSlice const & cs = dit.innerTextSlice();
        Dimension const & row_dim =
-               pm.getRow(cs.pos(), dit.boundary()).dimension();
+               pm.getRow(cs.pos(), dit.boundary()).dim();
 
        if (recenter)
                d->anchor_ypos_ = height_/2;
@@ -1152,7 +1171,7 @@ bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
                break;
 
        case LFUN_GRAPHICS_UNIFY:
-               flag.setEnabled(cur.selection());
+               flag.setEnabled(cur.countInsetsInSelection(GRAPHICS_CODE)>1);
                break;
 
        case LFUN_WORD_FINDADV: {
@@ -1245,13 +1264,16 @@ bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
 Inset * BufferView::editedInset(string const & name) const
 {
        map<string, Inset *>::const_iterator it = d->edited_insets_.find(name);
-       return it == d->edited_insets_.end() ? 0 : it->second;
+       return it == d->edited_insets_.end() ? nullptr : it->second;
 }
 
 
 void BufferView::editInset(string const & name, Inset * inset)
 {
-       d->edited_insets_[name] = inset;
+       if (inset)
+               d->edited_insets_[name] = inset;
+       else
+               d->edited_insets_.erase(name);
 }
 
 
@@ -1353,7 +1375,7 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                //  without calling recordUndo. Fix this before using
                //  recordUndoBufferParams().
                cur.recordUndoFullBuffer();
-               buffer_.params().setBaseClass(argument);
+               buffer_.params().setBaseClass(argument, buffer_.layoutPos());
                makeDocumentClass();
                dr.screenUpdate(Update::Force);
                dr.forceBufferUpdate();
@@ -1377,7 +1399,7 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
        case LFUN_LAYOUT_RELOAD: {
                LayoutFileIndex bc = buffer_.params().baseClassID();
                LayoutFileList::get().reset(bc);
-               buffer_.params().setBaseClass(bc);
+               buffer_.params().setBaseClass(bc, buffer_.layoutPos());
                makeDocumentClass();
                dr.screenUpdate(Update::Force);
                dr.forceBufferUpdate();
@@ -1390,14 +1412,14 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                // We need to find out if the bibliography information
                // has changed. See bug #11055.
                // So these should not be references...
-               LayoutModuleList const engines = buffer().params().citeEngine();
+               string const engine = buffer().params().citeEngine();
                CiteEngineType const enginetype = buffer().params().citeEngineType();
-               if (!cur.textUndo())
+               if (!cur.undoAction())
                        dr.setMessage(_("No further undo information"));
                else {
                        dr.screenUpdate(Update::Force | Update::FitCursor);
                        dr.forceBufferUpdate();
-                       if (buffer().params().citeEngine() != engines ||
+                       if (buffer().params().citeEngine() != engine ||
                            buffer().params().citeEngineType() != enginetype)
                                buffer().invalidateCiteLabels();
                }
@@ -1410,14 +1432,14 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                // We need to find out if the bibliography information
                // has changed. See bug #11055.
                // So these should not be references...
-               LayoutModuleList const engines = buffer().params().citeEngine();
+               string const engine = buffer().params().citeEngine();
                CiteEngineType const enginetype = buffer().params().citeEngineType();
-               if (!cur.textRedo())
+               if (!cur.redoAction())
                        dr.setMessage(_("No further redo information"));
                else {
                        dr.screenUpdate(Update::Force | Update::FitCursor);
                        dr.forceBufferUpdate();
-                       if (buffer().params().citeEngine() != engines ||
+                       if (buffer().params().citeEngine() != engine ||
                            buffer().params().citeEngineType() != enginetype)
                                buffer().invalidateCiteLabels();
                }
@@ -1515,12 +1537,18 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
 
        case LFUN_CHANGE_NEXT:
                findNextChange(this);
+               if (cur.inset().isTable())
+                       // In tables, there might be whole changed rows or columns
+                       cur.dispatch(cmd);
                // FIXME: Move this LFUN to Buffer so that we don't have to do this:
                dr.screenUpdate(Update::Force | Update::FitCursor);
                break;
 
        case LFUN_CHANGE_PREVIOUS:
                findPreviousChange(this);
+               if (cur.inset().isTable())
+                       // In tables, there might be whole changed rows or columns
+                       cur.dispatch(cmd);
                // FIXME: Move this LFUN to Buffer so that we don't have to do this:
                dr.screenUpdate(Update::Force | Update::FitCursor);
                break;
@@ -1533,32 +1561,43 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                }
                break;
 
-       case LFUN_ALL_CHANGES_ACCEPT:
+       case LFUN_ALL_CHANGES_ACCEPT: {
                // select complete document
                cur.reset();
                cur.selHandle(true);
                buffer_.text().cursorBottom(cur);
                // accept everything in a single step to support atomic undo
+               // temporarily disable track changes in order to end with really
+               // no new (e.g., DPSM-caused) changes (see #7487)
+               bool const track = buffer_.params().track_changes;
+               buffer_.params().track_changes = false;
                buffer_.text().acceptOrRejectChanges(cur, Text::ACCEPT);
+               buffer_.params().track_changes = track;
                cur.resetAnchor();
                // FIXME: Move this LFUN to Buffer so that we don't have to do this:
                dr.screenUpdate(Update::Force | Update::FitCursor);
                dr.forceBufferUpdate();
                break;
+       }
 
-       case LFUN_ALL_CHANGES_REJECT:
+       case LFUN_ALL_CHANGES_REJECT: {
                // select complete document
                cur.reset();
                cur.selHandle(true);
                buffer_.text().cursorBottom(cur);
                // reject everything in a single step to support atomic undo
-               // Note: reject does not work recursively; the user may have to repeat the operation
+               // temporarily disable track changes in order to end with really
+               // no new (e.g., DPSM-caused) changes (see #7487)
+               bool const track = buffer_.params().track_changes;
+               buffer_.params().track_changes = false;
                buffer_.text().acceptOrRejectChanges(cur, Text::REJECT);
+               buffer_.params().track_changes = track;
                cur.resetAnchor();
                // FIXME: Move this LFUN to Buffer so that we don't have to do this:
                dr.screenUpdate(Update::Force | Update::FitCursor);
                dr.forceBufferUpdate();
                break;
+       }
 
        case LFUN_WORD_FIND_FORWARD:
        case LFUN_WORD_FIND_BACKWARD: {
@@ -1888,10 +1927,12 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                        // At least one complete cell is selected and inset is a table.
                        // Select all cells
                        cur.idx() = 0;
+                       cur.pit() = 0;
                        cur.pos() = 0;
                        cur.resetAnchor();
                        cur.selection(true);
                        cur.idx() = cur.lastidx();
+                       cur.pit() = cur.lastpit();
                        cur.pos() = cur.lastpos();
                } else {
                        // select current cell
@@ -2163,7 +2204,7 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
 }
 
 
-docstring const BufferView::requestSelection()
+docstring BufferView::requestSelection()
 {
        Cursor & cur = d->cursor_;
 
@@ -2220,7 +2261,7 @@ Inset const * BufferView::getCoveringInset(Text const & text,
        TextMetrics & tm = d->text_metrics_[&text];
        Inset * inset = tm.checkInsetHit(x, y);
        if (!inset)
-               return 0;
+               return nullptr;
 
        if (!inset->descendable(*this))
                // No need to go further down if the inset is not
@@ -2261,7 +2302,7 @@ void BufferView::updateHoveredInset() const
        if (d->last_inset_) {
                // Remove the hint on the last hovered inset (if any).
                need_redraw |= d->last_inset_->setMouseHover(this, false);
-               d->last_inset_ = 0;
+               d->last_inset_ = nullptr;
        }
 
        if (covering_inset && covering_inset->setMouseHover(this, true)) {
@@ -2292,7 +2333,7 @@ void BufferView::clearLastInset(Inset * inset) const
                LYXERR0("Wrong last_inset!");
                LATTEST(false);
        }
-       d->last_inset_ = 0;
+       d->last_inset_ = nullptr;
 }
 
 
@@ -2499,15 +2540,26 @@ bool BufferView::setCursorFromInset(Inset const * inset)
 
 void BufferView::gotoLabel(docstring const & label)
 {
+       FuncRequest action;
+       bool have_inactive = false;
        for (Buffer const * buf : buffer().allRelatives()) {
                // find label
                for (TocItem const & item : *buf->tocBackend().toc("label")) {
-                       if (label == item.str()) {
+                       if (label == item.str() && item.isOutput()) {
                                lyx::dispatch(item.action());
                                return;
                        }
+                       // If we find an inactive label, save it for the case
+                       // that no active one is there
+                       if (label == item.str() && !have_inactive) {
+                               have_inactive = true;
+                               action = item.action();
+                       }
                }
        }
+       // We only found an inactive label. Go there.
+       if (have_inactive)
+               lyx::dispatch(action);
 }
 
 
@@ -2522,8 +2574,9 @@ TextMetrics & BufferView::textMetrics(Text const * t)
        LBUFERR(t);
        TextMetricsCache::iterator tmc_it  = d->text_metrics_.find(t);
        if (tmc_it == d->text_metrics_.end()) {
-               tmc_it = d->text_metrics_.insert(
-                       make_pair(t, TextMetrics(this, const_cast<Text *>(t)))).first;
+               tmc_it = d->text_metrics_.emplace(std::piecewise_construct,
+                               std::forward_as_tuple(t),
+                               std::forward_as_tuple(this, const_cast<Text *>(t))).first;
        }
        return tmc_it->second;
 }
@@ -2579,7 +2632,7 @@ bool BufferView::checkDepm(Cursor & cur, Cursor & old)
                return false;
 
        bool need_anchor_change = false;
-       bool changed = d->cursor_.text()->deleteEmptyParagraphMechanism(cur, old,
+       bool changed = Text::deleteEmptyParagraphMechanism(cur, old,
                need_anchor_change);
 
        if (need_anchor_change)
@@ -2757,6 +2810,7 @@ void BufferView::updateMetrics(Update::flags & update_flags)
 
        // Clear out the position cache in case of full screen redraw,
        d->coord_cache_.clear();
+       d->math_rows_.clear();
 
        // Clear out paragraph metrics to avoid having invalid metrics
        // in the cache from paragraphs not relayouted below
@@ -2854,7 +2908,7 @@ void BufferView::updatePosCache()
 }
 
 
-void BufferView::insertLyXFile(FileName const & fname)
+void BufferView::insertLyXFile(FileName const & fname, bool const ignorelang)
 {
        LASSERT(d->cursor_.inTexted(), return);
 
@@ -2872,8 +2926,12 @@ void BufferView::insertLyXFile(FileName const & fname)
                ErrorList & el = buffer_.errorList("Parse");
                // Copy the inserted document error list into the current buffer one.
                el = buf.errorList("Parse");
+               ParagraphList & pars = buf.paragraphs();
+               if (ignorelang)
+                       // set main language of imported file to context language
+                       buf.changeLanguage(buf.language(), d->cursor_.getFont().language());
                buffer_.undo().recordUndo(d->cursor_);
-               cap::pasteParagraphList(d->cursor_, buf.paragraphs(),
+               cap::pasteParagraphList(d->cursor_, pars,
                                             buf.params().documentClassPtr(), el);
                res = _("Document %1$s inserted.");
        } else {
@@ -2990,18 +3048,17 @@ bool BufferView::paragraphVisible(DocIterator const & dit) const
 
 void BufferView::caretPosAndHeight(Point & p, int & h) const
 {
+       int asc, des;
        Cursor const & cur = cursor();
-       Font const font = cur.real_current_font;
-       frontend::FontMetrics const & fm = theFontMetrics(font);
-       int asc = fm.maxAscent();
-       int des = fm.maxDescent();
-       // If the cursor is in mathed and it has cached metrics, reduce
-       // the height to fit the inner cell (mathed cells are tight
-       // vertically).
-       if (cur.inMathed() && coordCache().getArrays().hasDim(&cur.cell())) {
-               Dimension const dim = cur.cell().dimension(*this);
-               asc = min(asc, dim.asc);
-               des = min(des, dim.des);
+       if (cur.inMathed()) {
+               MathRow const & mrow = mathRow(&cur.cell());
+               asc = mrow.caret_ascent;
+               des = mrow.caret_descent;
+       } else {
+               Font const font = cur.real_current_font;
+               frontend::FontMetrics const & fm = theFontMetrics(font);
+               asc = fm.maxAscent();
+               des = fm.maxDescent();
        }
        h = asc + des;
        p = getPos(cur);
@@ -3009,11 +3066,16 @@ void BufferView::caretPosAndHeight(Point & p, int & h) const
 }
 
 
-bool BufferView::cursorInView(Point const & p, int h) const
+bool BufferView::caretInView() const
 {
-       Cursor const & cur = cursor();
+       if (!paragraphVisible(cursor()))
+               return false;
+       Point p;
+       int h;
+       caretPosAndHeight(p, h);
+
        // does the cursor touch the screen ?
-       if (p.y_ + h < 0 || p.y_ >= workHeight() || !paragraphVisible(cur))
+       if (p.y_ + h < 0 || p.y_ >= workHeight())
                return false;
        return true;
 }
@@ -3038,30 +3100,24 @@ int BufferView::horizScrollOffset(Text const * text,
 }
 
 
-bool BufferView::hadHorizScrollOffset(Text const * text,
-                                      pit_type pit, pos_type pos) const
-{
-       return !d->last_row_slice_.empty()
-              && &text->inset() == d->last_row_slice_.inset().asInsetText()
-              && pit ==  d->last_row_slice_.pit()
-              && pos ==  d->last_row_slice_.pos();
-}
-
-
 void BufferView::setCurrentRowSlice(CursorSlice const & rowSlice)
 {
        // nothing to do if the cursor was already on this row
-       if (d->current_row_slice_ == rowSlice) {
-               d->last_row_slice_ = CursorSlice();
+       if (d->current_row_slice_ == rowSlice)
                return;
-       }
 
        // if the (previous) current row was scrolled, we have to
        // remember it in order to repaint it next time.
-       if (d->horiz_scroll_offset_ != 0)
-               d->last_row_slice_ = d->current_row_slice_;
-       else
-               d->last_row_slice_ = CursorSlice();
+       if (d->horiz_scroll_offset_ != 0) {
+               // search the old row in cache and mark it changed
+               for (auto & tm_pair : d->text_metrics_) {
+                       if (&tm_pair.first->inset() == rowSlice.inset().asInsetText()) {
+                               tm_pair.second.setRowChanged(rowSlice.pit(), rowSlice.pos());
+                               // We found it, no need to continue.
+                               break;
+                       }
+               }
+       }
 
        // Since we changed row, the scroll offset is not valid anymore
        d->horiz_scroll_offset_ = 0;
@@ -3069,29 +3125,6 @@ void BufferView::setCurrentRowSlice(CursorSlice const & rowSlice)
 }
 
 
-namespace {
-
-bool sliceInRow(CursorSlice const & cs, Text const * text, Row const & row)
-{
-       /* The normal case is the last line. The previous line takes care
-        * of empty rows (e.g. empty paragraphs). Cursor boundary issues
-        * are taken care of when setting caret_slice_ in
-        * BufferView::draw.
-        */
-       return !cs.empty() && cs.text() == text && cs.pit() == row.pit()
-              && ((row.pos() == row.endpos() && row.pos() == cs.pos())
-                 || (row.pos() <= cs.pos() && cs.pos() < row.endpos()));
-}
-
-}
-
-
-bool BufferView::needRepaint(Text const * text, Row const & row) const
-{
-       return d->repaint_caret_row_ && sliceInRow(d->caret_slice_, text, row);
-}
-
-
 void BufferView::checkCursorScrollOffset()
 {
        CursorSlice rowSlice = d->cursor_.bottom();
@@ -3141,8 +3174,7 @@ void BufferView::checkCursorScrollOffset()
                       << d->horiz_scroll_offset_ << " to " << offset);
 
        if (d->update_strategy_ == NoScreenUpdate
-           && (offset != d->horiz_scroll_offset_
-               || !d->last_row_slice_.empty())) {
+           && offset != d->horiz_scroll_offset_) {
                // FIXME: if one uses SingleParUpdate, then home/end
                // will not work on long rows. Why?
                d->update_strategy_ = FullScreenUpdate;
@@ -3163,16 +3195,6 @@ void BufferView::draw(frontend::Painter & pain, bool paint_caret)
        int const y = tm.first().second->position();
        PainterInfo pi(this, pain);
 
-       /**  A repaint of the previous caret row is needed if there is
-        *  caret painted on screen and either
-        *   1/ a new caret has to be painted at a place different from
-        *      the existing one;
-        *   2/ there is no need for a caret anymore.
-        */
-       d->repaint_caret_row_ = !d->caret_slice_.empty() &&
-               ((paint_caret && d->cursor_.top() != d->caret_slice_)
-                || ! paint_caret);
-
        // Check whether the row where the cursor lives needs to be scrolled.
        // Update the drawing strategy if needed.
        checkCursorScrollOffset();
@@ -3184,11 +3206,10 @@ void BufferView::draw(frontend::Painter & pain, bool paint_caret)
                // however, the different coordinates of insets and paragraphs
                // needs to be updated.
                LYXERR(Debug::PAINTING, "Strategy: NoScreenUpdate");
-               pi.full_repaint = false;
                if (pain.isNull()) {
                        pi.full_repaint = true;
                        tm.draw(pi, 0, y);
-               } else if (d->repaint_caret_row_) {
+               } else {
                        pi.full_repaint = false;
                        tm.draw(pi, 0, y);
                }
@@ -3262,15 +3283,15 @@ void BufferView::draw(frontend::Painter & pain, bool paint_caret)
                d->update_flags_ = Update::None;
        }
 
-       // Remember what has just been done for the next draw() step
+       // If a caret has to be painted, mark its text row as dirty to
+       //make sure that it will be repainted on next redraw.
+       /* FIXME: investigate whether this can be avoided when the cursor did not
+        * move at all
+        */
        if (paint_caret) {
-               d->caret_slice_ = d->cursor_.top();
-               if (d->caret_slice_.pos() > 0
-                   && (d->cursor_.boundary()
-                       || d->caret_slice_.pos() == d->caret_slice_.lastpos()))
-                       --d->caret_slice_.pos();
-       } else
-               d->caret_slice_ = CursorSlice();
+               Row const & caret_row = d->cursor_.textRow();
+               caret_row.changed(true);
+       }
 }