]> git.lyx.org Git - lyx.git/blobdiff - src/BufferView.cpp
Provide proper fallback if a bibliography processor is not found
[lyx.git] / src / BufferView.cpp
index 097a465f7b2fdee50f67212ba9fb290574f9b3e0..182bfdf765c20886628859d9be99131445368b34 100644 (file)
@@ -46,6 +46,7 @@
 #include "Paragraph.h"
 #include "ParagraphParameters.h"
 #include "ParIterator.h"
+#include "RowPainter.h"
 #include "Session.h"
 #include "Text.h"
 #include "TextClass.h"
 #include "insets/InsetText.h"
 
 #include "mathed/MathData.h"
+#include "mathed/InsetMathNest.h"
 
 #include "frontends/alert.h"
 #include "frontends/Application.h"
 #include "frontends/Delegates.h"
 #include "frontends/FontMetrics.h"
+#include "frontends/NullPainter.h"
 #include "frontends/Painter.h"
 #include "frontends/Selection.h"
 
@@ -215,7 +218,7 @@ enum ScreenUpdateStrategy {
        DecorationUpdate
 };
 
-} // anon namespace
+} // namespace
 
 
 /////////////////////////////////////////////////////////////////////
@@ -226,21 +229,28 @@ enum ScreenUpdateStrategy {
 
 struct BufferView::Private
 {
-       Private(BufferView & bv) : update_strategy_(NoScreenUpdate),
+       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)
-       {}
+               horiz_scroll_offset_(0),
+               caret_ascent_(0), caret_descent_(0)
+       {
+               xsel_cache_.set = false;
+       }
 
        ///
        ScrollbarParameters scrollbarParameters_;
        ///
        ScreenUpdateStrategy update_strategy_;
        ///
+       Update::flags update_flags_;
+       ///
        CoordCache coord_cache_;
 
        /// Estimated average par height for scrollbar.
@@ -308,6 +318,12 @@ struct BufferView::Private
        /// a slice pointing to the start of the row where cursor was
        /// at previous draw event
        CursorSlice last_row_slice_;
+
+       // The vertical size of the blinking caret. Only used for math
+       // Using it for text could be bad when undo restores the cursor
+       // current font, since the caret size could become wrong.
+       int caret_ascent_;
+       int caret_descent_;
 };
 
 
@@ -335,9 +351,10 @@ 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);
@@ -348,11 +365,12 @@ BufferView::~BufferView()
 
 int BufferView::rightMargin() const
 {
+       // The value used to be hardcoded to 10, which is 0.1in at 100dpi
+       int const default_margin = Length(0.1, Length::IN).inPixels(0);
        // The additional test for the case the outliner is opened.
-       if (!full_screen_ ||
-               !lyxrc.full_screen_limit ||
-               width_ < lyxrc.full_screen_width + 20)
-                       return 10;
+       if (!full_screen_ || !lyxrc.full_screen_limit
+           || width_ < lyxrc.full_screen_width + 2 * default_margin)
+               return default_margin;
 
        return (width_ - lyxrc.full_screen_width) / 2;
 }
@@ -364,15 +382,22 @@ int BufferView::leftMargin() const
 }
 
 
+int BufferView::inPixels(Length const & len) const
+{
+       Font const font = buffer().params().getFont();
+       return len.inPixels(workWidth(), theFontMetrics(font).em());
+}
+
+
 bool BufferView::isTopScreen() const
 {
-       return d->scrollbarParameters_.position == d->scrollbarParameters_.min;
+       return 0 == d->scrollbarParameters_.min;
 }
 
 
 bool BufferView::isBottomScreen() const
 {
-       return d->scrollbarParameters_.position == d->scrollbarParameters_.max;
+       return 0 == d->scrollbarParameters_.max;
 }
 
 
@@ -427,79 +452,96 @@ bool BufferView::needsFitCursor() const
 }
 
 
-void BufferView::processUpdateFlags(Update::flags flags)
+namespace {
+
+// this is for debugging only.
+string flagsAsString(Update::flags flags)
 {
-       // This is close to a hot-path.
-       LYXERR(Debug::DEBUG, "BufferView::processUpdateFlags()"
-               << "[fitcursor = " << (flags & Update::FitCursor)
-               << ", forceupdate = " << (flags & Update::Force)
-               << ", singlepar = " << (flags & Update::SinglePar)
-               << "]  buffer: " << &buffer_);
+       if (flags == Update::None)
+               return "None ";
+       return string((flags & Update::FitCursor) ? "FitCursor " : "")
+               + ((flags & Update::Force) ? "Force " : "")
+               + ((flags & Update::ForceDraw) ? "ForceDraw " : "")
+               + ((flags & Update::SinglePar) ? "SinglePar " : "")
+               + ((flags & Update::Decoration) ? "Decoration " : "");
+}
 
-       // FIXME Does this really need doing here? It's done in updateBuffer, and
-       // if the Buffer doesn't need updating, then do the macros?
-       buffer_.updateMacros();
+}
 
-       // Now do the first drawing step if needed. This consists on updating
-       // the CoordCache in updateMetrics().
-       // The second drawing step is done in WorkArea::redraw() if needed.
-       // FIXME: is this still true now that Buffer::changed() is used all over?
+void BufferView::processUpdateFlags(Update::flags flags)
+{
+       LYXERR(Debug::PAINTING, "BufferView::processUpdateFlags( "
+                  << flagsAsString(flags) << ")  buffer: " << &buffer_);
 
        // Case when no explicit update is requested.
-       if (!flags) {
-               // no need to redraw anything.
-               d->update_strategy_ = NoScreenUpdate;
+       if (flags == Update::None)
                return;
+
+       /* 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();
+
+       // 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;
+
+       // First check whether the metrics and inset positions should be updated
+       if (flags & Update::Force) {
+               // This will update the CoordCache items and replace Force
+               // with ForceDraw in flags.
+               updateMetrics(flags);
        }
 
-       if (flags == Update::Decoration) {
-               d->update_strategy_ = DecorationUpdate;
-               buffer_.changed(false);
-               return;
+       // Detect whether we can only repaint a single paragraph.
+       // We handle this before FitCursor because the later will require
+       // correct metrics at cursor position.
+       if (!(flags & Update::ForceDraw)) {
+               if (singleParUpdate())
+                       flags = flags | Update::SinglePar;
+               else
+                       updateMetrics(flags);
        }
 
-       if (flags == Update::FitCursor
-               || flags == (Update::Decoration | Update::FitCursor)) {
-               // tell the frontend to update the screen if needed.
+       // Then make sure that the screen contains the cursor if needed
+       if (flags & Update::FitCursor) {
                if (needsFitCursor()) {
-                       showCursor();
-                       return;
+                       scrollToCursor(d->cursor_, false);
+                       // Metrics have to be recomputed (maybe again)
+                       updateMetrics(flags);
                }
-               if (flags & Update::Decoration) {
-                       d->update_strategy_ = DecorationUpdate;
-                       buffer_.changed(false);
-                       return;
-               }
-               // no screen update is needed in principle, but this
-               // could change if cursor row needs horizontal scrolling.
-               d->update_strategy_ = NoScreenUpdate;
-               buffer_.changed(false);
-               return;
+               flags = flags & ~Update::FitCursor;
        }
 
-       bool const full_metrics = flags & Update::Force || !singleParUpdate();
-
-       if (full_metrics)
-               // We have to update the full screen metrics.
-               updateMetrics();
-
-       if (!(flags & Update::FitCursor)) {
-               // Nothing to do anymore. Trigger a redraw and return
-               buffer_.changed(false);
-               return;
-       }
+       // 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));
 
-       // updateMetrics() does not update paragraph position
-       // This is done at draw() time. So we need a redraw!
-       buffer_.changed(false);
+       // Now compute the update strategy
+       // Possibly values in flag are None, Decoration, ForceDraw
+       LATTEST((d->update_flags_ & ~(Update::None | Update::SinglePar
+                                     | Update::Decoration | Update::ForceDraw)) == 0);
 
-       if (needsFitCursor()) {
-               // The cursor is off screen so ensure it is visible.
-               // refresh it:
-               showCursor();
+       if (d->update_flags_ & Update::ForceDraw)
+               d->update_strategy_ = FullScreenUpdate;
+       else if (d->update_flags_ & Update::Decoration)
+               d->update_strategy_ = DecorationUpdate;
+       else if (d->update_flags_ & Update::SinglePar)
+               d->update_strategy_ = SingleParUpdate;
+       else {
+               // no need to redraw anything.
+               d->update_strategy_ = NoScreenUpdate;
        }
 
        updateHoveredInset();
+
+       // Trigger a redraw.
+       buffer_.changed(false);
 }
 
 
@@ -555,12 +597,17 @@ void BufferView::updateScrollbar()
        for (size_t i = last.first + 1; i != parsize; ++i)
                d->scrollbarParameters_.max += d->par_height_[i];
 
-       d->scrollbarParameters_.position = 0;
        // The reference is the top position so we remove one page.
        if (lyxrc.scroll_below_document)
                d->scrollbarParameters_.max -= minVisiblePart();
        else
                d->scrollbarParameters_.max -= d->scrollbarParameters_.page_step;
+
+       // 0 must be inside the range as it denotes the current position
+       if (d->scrollbarParameters_.max < 0)
+               d->scrollbarParameters_.max = 0;
+       if (d->scrollbarParameters_.min > 0)
+               d->scrollbarParameters_.min = 0;
 }
 
 
@@ -596,19 +643,20 @@ string BufferView::contextMenu(int x, int y) const
 }
 
 
-void BufferView::scrollDocView(int value, bool update)
+
+void BufferView::scrollDocView(int const value, bool update)
 {
-       int const offset = value - d->scrollbarParameters_.position;
+       // The scrollbar values are relative to the top of the screen, therefore the
+       // offset is equal to the target value.
 
        // No scrolling at all? No need to redraw anything
-       if (offset == 0)
+       if (value == 0)
                return;
 
        // If the offset is less than 2 screen height, prefer to scroll instead.
-       if (abs(offset) <= 2 * height_) {
-               d->anchor_ypos_ -= offset;
-               buffer_.changed(true);
-               updateHoveredInset();
+       if (abs(value) <= 2 * height_) {
+               d->anchor_ypos_ -= value;
+               processUpdateFlags(Update::Force);
                return;
        }
 
@@ -703,9 +751,7 @@ Change const BufferView::getCurrentChange() const
 
        DocIterator dit = d->cursor_.selectionBegin();
        // The selected content might have been changed (see #7685)
-       while (dit.inMathed())
-               // Find enclosing text cursor
-               dit.pop_back();
+       dit = dit.getInnerText();
        return dit.paragraph().lookupChange(dit.pos());
 }
 
@@ -771,7 +817,7 @@ bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
                if (!dit.atEnd()) {
                        dit.pos() = min(dit.paragraph().size(), top_pos);
                        // Some slices of the iterator may not be
-                       // reachable (e.g. closed collapsable inset)
+                       // reachable (e.g. closed collapsible inset)
                        // so the dociterator may need to be
                        // shortened. Otherwise, setCursor may crash
                        // lyx when the cursor can not be set to these
@@ -805,12 +851,9 @@ bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
                setCursor(dit);
                // set the current font.
                d->cursor_.setCurrentFont();
-               // To center the screen on this new position we need the
-               // paragraph position which is computed at draw() time.
-               // So we need a redraw!
-               buffer_.changed(false);
-               if (needsFitCursor())
-                       showCursor();
+               // Do not forget to reset the anchor (see #9912)
+               d->cursor_.resetAnchor();
+               processUpdateFlags(Update::Force | Update::FitCursor);
        }
 
        return success;
@@ -852,23 +895,19 @@ void BufferView::showCursor()
 void BufferView::showCursor(DocIterator const & dit,
        bool recenter, bool update)
 {
-       if (scrollToCursor(dit, recenter) && update) {
-               buffer_.changed(true);
-               updateHoveredInset();
-       }
+       if (scrollToCursor(dit, recenter) && update)
+               processUpdateFlags(Update::Force);
 }
 
 
 void BufferView::scrollToCursor()
 {
-       if (scrollToCursor(d->cursor_, false)) {
-               buffer_.changed(true);
-               updateHoveredInset();
-       }
+       if (scrollToCursor(d->cursor_, false))
+               processUpdateFlags(Update::Force);
 }
 
 
-bool BufferView::scrollToCursor(DocIterator const & dit, bool recenter)
+bool BufferView::scrollToCursor(DocIterator const & dit, bool const recenter)
 {
        // We are not properly started yet, delay until resizing is
        // done.
@@ -1017,7 +1056,10 @@ bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
        if (buffer_.isReadonly()
            && !lyxaction.funcHasFlag(act, LyXAction::ReadOnly)
            && !lyxaction.funcHasFlag(act, LyXAction::NoBuffer)) {
-               flag.message(from_utf8(N_("Document is read-only")));
+               if (buffer_.hasReadonlyFlag())
+                       flag.message(from_utf8(N_("Document is read-only")));
+               else
+                       flag.message(from_utf8(N_("Document has been modified externally")));
                flag.setEnabled(false);
                return true;
        }
@@ -1107,6 +1149,10 @@ bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
                flag.setEnabled(true);
                break;
 
+       case LFUN_GRAPHICS_UNIFY:
+               flag.setEnabled(cur.countInsetsInSelection(GRAPHICS_CODE)>1);
+               break;
+
        case LFUN_WORD_FINDADV: {
                FindAndReplaceOptions opt;
                istringstream iss(to_utf8(cmd.argument()));
@@ -1121,37 +1167,13 @@ bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
                    || getInsetByCode<InsetRef>(cur, REF_CODE));
                break;
 
-       case LFUN_CHANGES_TRACK:
-               flag.setEnabled(true);
-               flag.setOnOff(buffer_.params().track_changes);
-               break;
-
-       case LFUN_CHANGES_OUTPUT:
-               flag.setEnabled(true);
-               flag.setOnOff(buffer_.params().output_changes);
-               break;
-
        case LFUN_CHANGES_MERGE:
        case LFUN_CHANGE_NEXT:
        case LFUN_CHANGE_PREVIOUS:
        case LFUN_ALL_CHANGES_ACCEPT:
        case LFUN_ALL_CHANGES_REJECT:
-               // TODO: context-sensitive enabling of LFUNs
-               // In principle, these command should only be enabled if there
-               // is a change in the document. However, without proper
-               // optimizations, this will inevitably result in poor performance.
-               flag.setEnabled(true);
-               break;
-
-       case LFUN_BUFFER_TOGGLE_COMPRESSION: {
-               flag.setOnOff(buffer_.params().compressed);
+               flag.setEnabled(buffer_.areChangesPresent());
                break;
-       }
-
-       case LFUN_BUFFER_TOGGLE_OUTPUT_SYNC: {
-               flag.setOnOff(buffer_.params().output_sync);
-               break;
-       }
 
        case LFUN_SCREEN_UP:
        case LFUN_SCREEN_DOWN:
@@ -1210,6 +1232,10 @@ bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
                break;
        }
 
+       case LFUN_COPY:
+               flag.setEnabled(cur.selection());
+               break;
+
        default:
                return false;
        }
@@ -1227,7 +1253,10 @@ Inset * BufferView::editedInset(string const & name) const
 
 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);
 }
 
 
@@ -1329,7 +1358,7 @@ 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();
@@ -1353,35 +1382,55 @@ 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();
                break;
        }
 
-       case LFUN_UNDO:
+       case LFUN_UNDO: {
                dr.setMessage(_("Undo"));
                cur.clearSelection();
+               // 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();
+               CiteEngineType const enginetype = buffer().params().citeEngineType();
                if (!cur.textUndo())
                        dr.setMessage(_("No further undo information"));
-               else
+               else {
                        dr.screenUpdate(Update::Force | Update::FitCursor);
-               dr.forceBufferUpdate();
+                       dr.forceBufferUpdate();
+                       if (buffer().params().citeEngine() != engines ||
+                           buffer().params().citeEngineType() != enginetype)
+                               buffer().invalidateCiteLabels();
+               }
                break;
+       }
 
-       case LFUN_REDO:
+       case LFUN_REDO: {
                dr.setMessage(_("Redo"));
                cur.clearSelection();
+               // 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();
+               CiteEngineType const enginetype = buffer().params().citeEngineType();
                if (!cur.textRedo())
                        dr.setMessage(_("No further redo information"));
-               else
+               else {
                        dr.screenUpdate(Update::Force | Update::FitCursor);
-               dr.forceBufferUpdate();
+                       dr.forceBufferUpdate();
+                       if (buffer().params().citeEngine() != engines ||
+                           buffer().params().citeEngineType() != enginetype)
+                               buffer().invalidateCiteLabels();
+               }
                break;
+       }
 
        case LFUN_FONT_STATE:
-               dr.setMessage(cur.currentState());
+               dr.setMessage(cur.currentState(false));
                break;
 
        case LFUN_BOOKMARK_SAVE:
@@ -1411,7 +1460,11 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
 
        case LFUN_PARAGRAPH_GOTO: {
                int const id = convert<int>(cmd.getArg(0));
-               int const pos = convert<int>(cmd.getArg(1));
+               pos_type const pos = convert<int>(cmd.getArg(1));
+               if (id < 0)
+                       break;
+               string const str_id_end = cmd.getArg(2);
+               string const str_pos_end = cmd.getArg(3);
                int i = 0;
                for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
                        b = theBufferList().next(b)) {
@@ -1428,10 +1481,20 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                                << b->absFileName() << "'.");
 
                        if (b == &buffer_) {
-                               // Set the cursor
-                               cur.pos() = pos;
-                               mouseSetCursor(cur);
-                               dr.screenUpdate(Update::Force | Update::FitCursor);
+                               bool success;
+                               if (str_id_end.empty() || str_pos_end.empty()) {
+                                       // Set the cursor
+                                       cur.pos() = pos;
+                                       mouseSetCursor(cur);
+                                       success = true;
+                               } else {
+                                       int const id_end = convert<int>(str_id_end);
+                                       pos_type const pos_end = convert<int>(str_pos_end);
+                                       success = setCursorFromEntries({id, pos},
+                                                                      {id_end, pos_end});
+                               }
+                               if (success)
+                                       dr.screenUpdate(Update::Force | Update::FitCursor);
                        } else {
                                // Switch to other buffer view and resend cmd
                                lyx::dispatch(FuncRequest(
@@ -1445,6 +1508,10 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
 
        case LFUN_NOTE_NEXT:
                gotoInset(this, NOTE_CODE, false);
+               // FIXME: if SinglePar is changed to act on the inner
+               // paragraph, this will not be OK anymore. The update is
+               // useful for auto-open collapsible insets.
+               dr.screenUpdate(Update::SinglePar | Update::FitCursor);
                break;
 
        case LFUN_REFERENCE_NEXT: {
@@ -1452,36 +1519,13 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                tmp.push_back(LABEL_CODE);
                tmp.push_back(REF_CODE);
                gotoInset(this, tmp, true);
+               // FIXME: if SinglePar is changed to act on the inner
+               // paragraph, this will not be OK anymore. The update is
+               // useful for auto-open collapsible insets.
+               dr.screenUpdate(Update::SinglePar | Update::FitCursor);
                break;
        }
 
-       case LFUN_CHANGES_TRACK:
-               buffer_.params().track_changes = !buffer_.params().track_changes;
-               break;
-
-       case LFUN_CHANGES_OUTPUT:
-               buffer_.params().output_changes = !buffer_.params().output_changes;
-               if (buffer_.params().output_changes) {
-                       bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
-                       bool xcolorulem = LaTeXFeatures::isAvailable("ulem") &&
-                                         LaTeXFeatures::isAvailable("xcolor");
-
-                       if (!dvipost && !xcolorulem) {
-                               Alert::warning(_("Changes not shown in LaTeX output"),
-                                              _("Changes will not be highlighted in LaTeX output, "
-                                                "because neither dvipost nor xcolor/ulem are installed.\n"
-                                                "Please install these packages or redefine "
-                                                "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
-                       } else if (!xcolorulem) {
-                               Alert::warning(_("Changes not shown in LaTeX output"),
-                                              _("Changes will not be highlighted in LaTeX output "
-                                                "when using pdflatex, because xcolor and ulem are not installed.\n"
-                                                "Please install both packages or redefine "
-                                                "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
-                       }
-               }
-               break;
-
        case LFUN_CHANGE_NEXT:
                findNextChange(this);
                // FIXME: Move this LFUN to Buffer so that we don't have to do this:
@@ -1550,14 +1594,8 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                docstring const data =
                        find2string(searched_string, true, false, fw);
                bool found = lyxfind(this, FuncRequest(LFUN_WORD_FIND, data));
-               if (found) {
+               if (found)
                        dr.screenUpdate(Update::Force | Update::FitCursor);
-                       cur.dispatched();
-                       dispatched = true;
-               } else {
-                       cur.undispatched();
-                       dispatched = false;
-               }
                break;
        }
 
@@ -1569,14 +1607,9 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                        lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, "findreplace"));
                        break;
                }
-               if (lyxfind(this, req)) {
+               if (lyxfind(this, req))
                        dr.screenUpdate(Update::Force | Update::FitCursor);
-                       cur.dispatched();
-                       dispatched = true;
-               } else {
-                       cur.undispatched();
-                       dispatched = false;
-               }
+
                d->search_request_cache_ = req;
                break;
        }
@@ -1598,11 +1631,6 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                if (lyxreplace(this, cmd, has_deleted)) {
                        dr.forceBufferUpdate();
                        dr.screenUpdate(Update::Force | Update::FitCursor);
-                       cur.dispatched();
-                       dispatched = true;
-               } else {
-                       cur.undispatched();
-                       dispatched = false;
                }
                break;
        }
@@ -1634,7 +1662,7 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                break;
 
        case LFUN_MARK_TOGGLE:
-               cur.setSelection(false);
+               cur.selection(false);
                if (cur.mark()) {
                        cur.setMark(false);
                        dr.setMessage(from_utf8(N_("Mark removed")));
@@ -1660,7 +1688,6 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                                                BIBTEX_CODE);
                if (inset) {
                        if (inset->addDatabase(cmd.argument())) {
-                               buffer_.invalidateBibfileCache();
                                dr.forceBufferUpdate();
                        }
                }
@@ -1673,11 +1700,48 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
                                                BIBTEX_CODE);
                if (inset) {
-                       if (inset->delDatabase(cmd.argument())) {
-                               buffer_.invalidateBibfileCache();
+                       if (inset->delDatabase(cmd.argument()))
                                dr.forceBufferUpdate();
+               }
+               break;
+       }
+
+       case LFUN_GRAPHICS_UNIFY: {
+
+               cur.recordUndoFullBuffer();
+
+               DocIterator from, to;
+               from = cur.selectionBegin();
+               to = cur.selectionEnd();
+
+               string const newId = cmd.getArg(0);
+               bool fetchId = newId.empty(); //if we wait for groupId from first graphics inset
+
+               InsetGraphicsParams grp_par;
+               if (!fetchId)
+                       InsetGraphics::string2params(graphics::getGroupParams(buffer_, newId), buffer_, grp_par);
+
+               if (!from.nextInset())  //move to closest inset
+                       from.forwardInset();
+
+               while (!from.empty() && from < to) {
+                       Inset * inset = from.nextInset();
+                       if (!inset)
+                               break;
+                       if (inset->lyxCode() == GRAPHICS_CODE) {
+                       InsetGraphics & ig = static_cast<InsetGraphics &>(*inset);
+                               InsetGraphicsParams inspar = ig.getParams();
+                               if (fetchId) {
+                                       grp_par = inspar;
+                                       fetchId = false;
+                               } else {
+                                       grp_par.filename = inspar.filename;
+                                       ig.setParams(grp_par);
+                               }
                        }
+                       from.forwardInset();
                }
+               dr.screenUpdate(Update::Force); //needed if triggered from context menu
                break;
        }
 
@@ -1721,15 +1785,6 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
        }
                break;
 
-       case LFUN_BUFFER_TOGGLE_COMPRESSION:
-               // turn compression on/off
-               buffer_.params().compressed = !buffer_.params().compressed;
-               break;
-
-       case LFUN_BUFFER_TOGGLE_OUTPUT_SYNC:
-               buffer_.params().output_sync = !buffer_.params().output_sync;
-               break;
-
        case LFUN_SCREEN_UP:
        case LFUN_SCREEN_DOWN: {
                Point p = getPos(cur);
@@ -1749,8 +1804,8 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                bool const in_texted = cur.inTexted();
                cur.setCursor(doc_iterator_begin(cur.buffer()));
                cur.selHandle(false);
-               buffer_.changed(true);
-               updateHoveredInset();
+               // Force an immediate computation of metrics because we need it below
+               processUpdateFlags(Update::Force);
 
                d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_,
                        true, act == LFUN_SCREEN_UP);
@@ -1784,8 +1839,7 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                        if (scroll_value)
                                scroll(scroll_step * scroll_value);
                }
-               buffer_.changed(true);
-               updateHoveredInset();
+               dr.screenUpdate(Update::ForceDraw);
                dr.forceBufferUpdate();
                break;
        }
@@ -1827,39 +1881,74 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
        }
 
 
-       case LFUN_INSET_SELECT_ALL:
-               if (cur.depth() > 1
+       case LFUN_INSET_SELECT_ALL: {
+               // true if all cells are selected
+               bool const all_selected = cur.depth() > 1
                    && cur.selBegin().at_begin()
-                   && cur.selEnd().at_end()) {
-                       // All the contents of the inset if selected.
+                   && cur.selEnd().at_end();
+               // true if some cells are selected
+               bool const cells_selected = cur.depth() > 1
+                   && cur.selBegin().at_cell_begin()
+                       && cur.selEnd().at_cell_end();
+               if (all_selected || (cells_selected && !cur.inset().isTable())) {
+                       // All the contents of the inset if selected, or only at
+                       // least one cell but inset is not a table.
                        // Select the inset from outside.
                        cur.pop();
                        cur.resetAnchor();
-                       cur.setSelection(true);
+                       cur.selection(true);
                        cur.posForward();
-               } else if (cur.selBegin().idx() != cur.selEnd().idx()
-                          || (cur.depth() > 1
-                                  && cur.selBegin().at_cell_begin()
-                              && cur.selEnd().at_cell_end())) {
-                       // At least one complete cell is selected.
+               } else if (cells_selected) {
+                       // 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.setSelection(true);
+                       cur.selection(true);
                        cur.idx() = cur.lastidx();
+                       cur.pit() = cur.lastpit();
                        cur.pos() = cur.lastpos();
                } else {
                        // select current cell
                        cur.pit() = 0;
                        cur.pos() = 0;
                        cur.resetAnchor();
-                       cur.setSelection(true);
+                       cur.selection(true);
                        cur.pit() = cur.lastpit();
                        cur.pos() = cur.lastpos();
                }
+               cur.setCurrentFont();
                dr.screenUpdate(Update::Force);
                break;
+       }
+
+
+       case LFUN_UNICODE_INSERT: {
+               if (cmd.argument().empty())
+                       break;
+
+               FuncCode code = cur.inset().currentMode() == Inset::MATH_MODE ?
+                       LFUN_MATH_INSERT : LFUN_SELF_INSERT;
+               int i = 0;
+               while (true) {
+                       docstring const arg = from_utf8(cmd.getArg(i));
+                       if (arg.empty())
+                               break;
+                       if (!isHex(arg)) {
+                               LYXERR0("Not a hexstring: " << arg);
+                               ++i;
+                               continue;
+                       }
+                       char_type c = hexToInt(arg);
+                       if (c >= 32 && c < 0x10ffff) {
+                               LYXERR(Debug::KEY, "Inserting c: " << c);
+                               lyx::dispatch(FuncRequest(code, docstring(1, c)));
+                       }
+                       ++i;
+               }
+               break;
+       }
 
 
        // This would be in Buffer class if only Cursor did not
@@ -1899,9 +1988,17 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                        if (!cur.nextInset() || cur.nextInset() == ins)
                                cur.forwardInset();
                }
-               cur.endUndoGroup();
                cur = savecur;
                cur.fixIfBroken();
+               /** This is a dummy undo record only to remember the cursor
+                * that has just been set; this will be used on a redo action
+                * (see ticket #10097)
+
+                * FIXME: a better fix would be to have a way to set the
+                * cursor value directly, but I am not sure it is worth it.
+                */
+               cur.recordUndo();
+               cur.endUndoGroup();
                dr.screenUpdate(Update::Force);
                dr.forceBufferUpdate();
 
@@ -2001,6 +2098,8 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                icp["key"] = from_utf8(arg);
                if (!opt1.empty())
                        icp["before"] = from_utf8(opt1);
+               icp["literal"] = 
+                       from_ascii(InsetCitation::last_literal ? "true" : "false");
                string icstr = InsetCommand::params2string(icp);
                FuncRequest fr(LFUN_INSET_INSERT, icstr);
                lyx::dispatch(fr);
@@ -2058,6 +2157,18 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                break;
        }
 
+       case LFUN_COPY:
+               // With multi-cell table content, we pass down to the inset
+               if (cur.inTexted() && cur.selection()
+                   && cur.selectionBegin().idx() != cur.selectionEnd().idx()) {
+                       buffer_.dispatch(cmd, dr);
+                       dispatched = dr.dispatched();
+                       break;
+               }
+               cap::copySelection(cur);
+               cur.message(_("Copy"));
+               break;
+
        default:
                // OK, so try the Buffer itself...
                buffer_.dispatch(cmd, dr);
@@ -2173,7 +2284,7 @@ void BufferView::updateHoveredInset() const
        int const y = d->mouse_position_cache_.y_;
        Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
 
-       d->clickable_inset_ = covering_inset && covering_inset->clickable(x, y);
+       d->clickable_inset_ = covering_inset && covering_inset->clickable(*this, x, y);
 
        if (covering_inset == d->last_inset_)
                // Same inset, no need to do anything...
@@ -2229,7 +2340,7 @@ void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
        Cursor old = cursor();
        Cursor cur(*this);
        cur.push(buffer_.inset());
-       cur.setSelection(d->cursor_.selection());
+       cur.selection(d->cursor_.selection());
 
        // Either the inset under the cursor or the
        // surrounding Text will handle this event.
@@ -2247,6 +2358,20 @@ void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
 
        // Build temporary cursor.
        Inset * inset = d->text_metrics_[&buffer_.text()].editXY(cur, cmd.x(), cmd.y());
+       if (inset) {
+               // If inset is not editable, cur.pos() might point behind the
+               // inset (depending on cmd.x(), cmd.y()). This is needed for
+               // editing to fix bug 9628, but e.g. the context menu needs a
+               // cursor in front of the inset.
+               if ((inset->hasSettings() || !inset->contextMenuName().empty()
+                    || inset->lyxCode() == SEPARATOR_CODE) &&
+                   cur.nextInset() != inset && cur.prevInset() == inset)
+                       cur.posBackward();
+       } else if (cur.inTexted() && cur.pos()
+                       && cur.paragraph().isEnvSeparator(cur.pos() - 1)) {
+               // Always place cursor in front of a separator inset.
+               cur.posBackward();
+       }
 
        // Put anchor at the same position.
        cur.resetAnchor();
@@ -2265,8 +2390,6 @@ void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
        if (!inset || !cur.result().dispatched())
                cur.dispatch(cmd);
 
-       cur.endUndoGroup();
-
        // Notify left insets
        if (cur != old) {
                bool badcursor = old.fixIfBroken() | cur.fixIfBroken();
@@ -2275,6 +2398,8 @@ void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
                        cursor().fixIfBroken();
        }
 
+       cur.endUndoGroup();
+
        // Do we have a selection?
        theSelection().haveSelection(cursor().selection());
 
@@ -2353,52 +2478,35 @@ int BufferView::scrollUp(int offset)
 }
 
 
-void BufferView::setCursorFromRow(int row)
+bool BufferView::setCursorFromRow(int row)
 {
-       int tmpid;
-       int tmppos;
-       pit_type newpit = 0;
-       pos_type newpos = 0;
+       TexRow::TextEntry start, end;
+       tie(start,end) = buffer_.texrow().getEntriesFromRow(row);
+       LYXERR(Debug::LATEX,
+              "setCursorFromRow: for row " << row << ", TexRow has found "
+              "start (id=" << start.id << ",pos=" << start.pos << "), "
+              "end (id=" << end.id << ",pos=" << end.pos << ")");
+       return setCursorFromEntries(start, end);
+}
 
-       buffer_.texrow().getIdFromRow(row, tmpid, tmppos);
 
-       bool posvalid = (tmpid != -1);
-       if (posvalid) {
-               // we need to make sure that the row and position
-               // we got back are valid, because the buffer may well
-               // have changed since we last generated the LaTeX.
-               DocIterator dit = buffer_.getParFromID(tmpid);
-               if (dit == doc_iterator_end(&buffer_))
-                       posvalid = false;
-               else if (dit.depth() > 1) {
-                       // We are in an inset.
-                       pos_type lastpos = dit.lastpos();
-                       dit.pos() = tmppos > lastpos ? lastpos : tmppos;
-                       setCursor(dit);
-                       recenter();
-                       return;
-               } else {
-                       newpit = dit.pit();
-                       // now have to check pos.
-                       newpos = tmppos;
-                       Paragraph const & par = buffer_.text().getPar(newpit);
-                       if (newpos > par.size()) {
-                               LYXERR0("Requested position no longer valid.");
-                               newpos = par.size() - 1;
-                       }
-               }
-       }
-       if (!posvalid) {
-               frontend::Alert::error(_("Inverse Search Failed"),
-                       _("Invalid position requested by inverse search.\n"
-                   "You need to update the viewed document."));
-               return;
+bool BufferView::setCursorFromEntries(TexRow::TextEntry start,
+                                      TexRow::TextEntry end)
+{
+       DocIterator dit_start, dit_end;
+       tie(dit_start,dit_end) =
+               TexRow::getDocIteratorsFromEntries(start, end, buffer_);
+       if (!dit_start)
+               return false;
+       // Setting selection start
+       d->cursor_.clearSelection();
+       setCursor(dit_start);
+       // Setting selection end
+       if (dit_end) {
+               d->cursor_.resetAnchor();
+               setCursorSelectionTo(dit_end);
        }
-       d->cursor_.reset();
-       buffer_.text().setCursor(d->cursor_, newpit, newpos);
-       d->cursor_.setSelection(false);
-       d->cursor_.resetAnchor();
-       recenter();
+       return true;
 }
 
 
@@ -2424,6 +2532,8 @@ bool BufferView::setCursorFromInset(Inset const * inset)
 
 void BufferView::gotoLabel(docstring const & label)
 {
+       FuncRequest action;
+       bool have_inactive = false;
        ListOfBuffers bufs = buffer().allRelatives();
        ListOfBuffers::iterator it = bufs.begin();
        for (; it != bufs.end(); ++it) {
@@ -2431,15 +2541,24 @@ void BufferView::gotoLabel(docstring const & label)
 
                // find label
                shared_ptr<Toc> toc = buf->tocBackend().toc("label");
-               TocIterator toc_it = toc->begin();
-               TocIterator end = toc->end();
+               Toc::const_iterator toc_it = toc->begin();
+               Toc::const_iterator end = toc->end();
                for (; toc_it != end; ++toc_it) {
-                       if (label == toc_it->str()) {
+                       if (label == toc_it->str() && toc_it->isOutput()) {
                                lyx::dispatch(toc_it->action());
                                return;
                        }
+                       // If we find an inactive label, save it for the case
+                       // that no active one is there
+                       if (label == toc_it->str() && !have_inactive) {
+                               have_inactive = true;
+                               action = toc_it->action();
+                       }
                }
        }
+       // We only found an inactive label. Go there.
+       if (have_inactive)
+               lyx::dispatch(action);
 }
 
 
@@ -2482,7 +2601,7 @@ void BufferView::setCursor(DocIterator const & dit)
                dit[i].inset().edit(d->cursor_, true);
 
        d->cursor_.setCursor(dit);
-       d->cursor_.setSelection(false);
+       d->cursor_.selection(false);
        d->cursor_.setCurrentFont();
        // FIXME
        // It seems on general grounds as if this is probably needed, but
@@ -2492,6 +2611,18 @@ void BufferView::setCursor(DocIterator const & dit)
 }
 
 
+void BufferView::setCursorSelectionTo(DocIterator const & dit)
+{
+       size_t const n = dit.depth();
+       for (size_t i = 0; i < n; ++i)
+               dit[i].inset().edit(d->cursor_, true);
+
+       d->cursor_.selection(true);
+       d->cursor_.setCursorSelectionTo(dit);
+       d->cursor_.setCurrentFont();
+}
+
+
 bool BufferView::checkDepm(Cursor & cur, Cursor & old)
 {
        // Would be wrong to delete anything if we have a selection.
@@ -2519,7 +2650,7 @@ bool BufferView::checkDepm(Cursor & cur, Cursor & old)
 }
 
 
-bool BufferView::mouseSetCursor(Cursor & cur, bool select)
+bool BufferView::mouseSetCursor(Cursor & cur, bool const select)
 {
        LASSERT(&cur.bv() == this, return false);
 
@@ -2537,27 +2668,23 @@ bool BufferView::mouseSetCursor(Cursor & cur, bool select)
        if (leftinset)
                d->cursor_.fixIfBroken();
 
-       // FIXME: shift-mouse selection doesn't work well across insets.
-       bool const do_selection =
-                       select && &d->cursor_.normalAnchor().inset() == &cur.inset();
-
        // do the dEPM magic if needed
        // FIXME: (1) move this to InsetText::notifyCursorLeaves?
        // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
        // the leftinset bool would not be necessary (badcursor instead).
        bool update = leftinset;
-       if (!do_selection && d->cursor_.inTexted())
-               update |= checkDepm(cur, d->cursor_);
 
-       if (!do_selection)
-               d->cursor_.resetAnchor();
-       d->cursor_.setCursor(cur);
-       d->cursor_.boundary(cur.boundary());
-       if (do_selection)
+       if (select) {
                d->cursor_.setSelection();
-       else
+               d->cursor_.setCursorSelectionTo(cur);
+       } else {
+               if (d->cursor_.inTexted())
+                       update |= checkDepm(cur, d->cursor_);
+               d->cursor_.resetAnchor();
+               d->cursor_.setCursor(cur);
                d->cursor_.clearSelection();
-
+       }
+       d->cursor_.boundary(cur.boundary());
        d->cursor_.finishUndo();
        d->cursor_.setCurrentFont();
        if (update)
@@ -2611,7 +2738,7 @@ bool BufferView::selectIfEmpty(DocIterator & cur)
        d->cursor_.setCursor(cur);
        d->cursor_.pit() = beg_pit;
        d->cursor_.pos() = 0;
-       d->cursor_.setSelection(false);
+       d->cursor_.selection(false);
        d->cursor_.resetAnchor();
        d->cursor_.pit() = end_pit;
        d->cursor_.pos() = end_pos;
@@ -2643,7 +2770,7 @@ bool BufferView::singleParUpdate()
        Text & buftext = buffer_.text();
        pit_type const bottom_pit = d->cursor_.bottom().pit();
        TextMetrics & tm = textMetrics(&buftext);
-       int old_height = tm.parMetrics(bottom_pit).height();
+       Dimension const old_dim = tm.parMetrics(bottom_pit).dim();
 
        // make sure inline completion pointer is ok
        if (d->inlineCompletionPos_.fixIfBroken())
@@ -2654,13 +2781,18 @@ bool BufferView::singleParUpdate()
        // (if this paragraph contains insets etc., rebreaking will
        // recursively descend)
        tm.redoParagraph(bottom_pit);
-       ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
-       if (pm.height() != old_height)
+       ParagraphMetrics & pm = tm.par_metrics_[bottom_pit];
+       if (pm.height() != old_dim.height()) {
                // Paragraph height has changed so we cannot proceed to
                // the singlePar optimisation.
                return false;
+       }
+       // Since position() points to the baseline of the first row, we
+       // may have to update it. See ticket #11601 for an example where
+       // the height does not change but the ascent does.
+       pm.setPosition(pm.position() - old_dim.ascent() + pm.ascent());
 
-       d->update_strategy_ = SingleParUpdate;
+       tm.updatePosCache(bottom_pit);
 
        LYXERR(Debug::PAINTING, "\ny1: " << pm.position() - pm.ascent()
                << " y2: " << pm.position() + pm.descent()
@@ -2671,6 +2803,13 @@ bool BufferView::singleParUpdate()
 
 
 void BufferView::updateMetrics()
+{
+       updateMetrics(d->update_flags_);
+       d->update_strategy_ = FullScreenUpdate;
+}
+
+
+void BufferView::updateMetrics(Update::flags & update_flags)
 {
        if (height_ == 0 || width_ == 0)
                return;
@@ -2707,12 +2846,13 @@ void BufferView::updateMetrics()
                // Complete buffer visible? Then it's easy.
                if (scrollRange == 0)
                        d->anchor_ypos_ = anchor_pm.ascent();
-
-               // FIXME: Some clever handling needed to show
-               // the _first_ paragraph up to the top if the cursor is
-               // in the first line.
+               else {
+                       // avoid empty space above the first row
+                       d->anchor_ypos_ = min(d->anchor_ypos_, anchor_pm.ascent());
+               }
        }
        anchor_pm.setPosition(d->anchor_ypos_);
+       tm.updatePosCache(d->anchor_pit_);
 
        LYXERR(Debug::PAINTING, "metrics: "
                << " anchor pit = " << d->anchor_pit_
@@ -2728,6 +2868,7 @@ void BufferView::updateMetrics()
                y1 -= pm.descent();
                // Save the paragraph position in the cache.
                pm.setPosition(y1);
+               tm.updatePosCache(pit1);
                y1 -= pm.ascent();
        }
 
@@ -2741,6 +2882,7 @@ void BufferView::updateMetrics()
                y2 += pm.ascent();
                // Save the paragraph position in the cache.
                pm.setPosition(y2);
+               tm.updatePosCache(pit2);
                y2 += pm.descent();
        }
 
@@ -2752,7 +2894,11 @@ void BufferView::updateMetrics()
                << " pit1 = " << pit1
                << " pit2 = " << pit2);
 
-       d->update_strategy_ = FullScreenUpdate;
+       // metrics is done, full drawing is necessary now
+       update_flags = (update_flags & ~Update::Force) | Update::ForceDraw;
+
+       // Now update the positions of insets in the cache.
+       updatePosCache();
 
        if (lyxerr.debugging(Debug::WORKAREA)) {
                LYXERR(Debug::WORKAREA, "BufferView::updateMetrics");
@@ -2761,6 +2907,15 @@ void BufferView::updateMetrics()
 }
 
 
+void BufferView::updatePosCache()
+{
+       // this is the "nodraw" drawing stage: only set the positions of the
+       // insets in metrics cache.
+       frontend::NullPainter np;
+       draw(np, false);
+}
+
+
 void BufferView::insertLyXFile(FileName const & fname)
 {
        LASSERT(d->cursor_.inTexted(), return);
@@ -2823,20 +2978,7 @@ Point BufferView::coordOffset(DocIterator const & dit) const
                }
 
                // remember width for the case that sl.inset() is positioned in an RTL inset
-               if (i && dit[i - 1].text()) {
-                       // If this Inset is inside a Text Inset, retrieve the Dimension
-                       // from the containing text instead of using Inset::dimension() which
-                       // might not be implemented.
-                       // FIXME (Abdel 23/09/2007): this is a bit messy because of the
-                       // elimination of Inset::dim_ cache. This coordOffset() method needs
-                       // to be rewritten in light of the new design.
-                       Dimension const & dim = parMetrics(dit[i - 1].text(),
-                               dit[i - 1].pit()).insetDimension(&sl.inset());
-                       lastw = dim.wid;
-               } else {
-                       Dimension const dim = sl.inset().dimension(*this);
-                       lastw = dim.wid;
-               }
+               lastw = sl.inset().dimension(*this).wid;
 
                //lyxerr << "Cursor::getPos, i: "
                // << i << " x: " << xx << " y: " << y << endl;
@@ -2908,24 +3050,42 @@ bool BufferView::paragraphVisible(DocIterator const & dit) const
 }
 
 
-void BufferView::cursorPosAndHeight(Point & p, int & h) const
+void BufferView::setCaretAscentDescent(int asc, int des)
 {
+       d->caret_ascent_ = asc;
+       d->caret_descent_ = des;
+}
+
+
+void BufferView::caretPosAndHeight(Point & p, int & h) const
+{
+       int asc, des;
        Cursor const & cur = cursor();
-       Font const font = cur.getFont();
-       frontend::FontMetrics const & fm = theFontMetrics(font);
-       int const asc = fm.maxAscent();
-       int const des = fm.maxDescent();
+       if (cur.inMathed()) {
+               asc = d->caret_ascent_;
+               des = d->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);
        p.y_ -= asc;
 }
 
 
-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;
 }
@@ -2937,15 +3097,26 @@ int BufferView::horizScrollOffset() const
 }
 
 
-CursorSlice const & BufferView::currentRowSlice() const
+int BufferView::horizScrollOffset(Text const * text,
+                                  pit_type pit, pos_type pos) const
 {
-       return d->current_row_slice_;
+       // Is this a row that is currently scrolled?
+       if (!d->current_row_slice_.empty()
+           && &text->inset() == d->current_row_slice_.inset().asInsetText()
+           && pit ==  d->current_row_slice_.pit()
+           && pos ==  d->current_row_slice_.pos())
+               return d->horiz_scroll_offset_;
+       return 0;
 }
 
 
-CursorSlice const & BufferView::lastRowSlice() const
+bool BufferView::hadHorizScrollOffset(Text const * text,
+                                      pit_type pit, pos_type pos) const
 {
-       return d->last_row_slice_;
+       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();
 }
 
 
@@ -2988,22 +3159,31 @@ void BufferView::checkCursorScrollOffset()
        setCurrentRowSlice(rowSlice);
 
        // Current x position of the cursor in pixels
-       int const cur_x = getPos(d->cursor_).x_;
+       int cur_x = getPos(d->cursor_).x_;
 
        // Horizontal scroll offset of the cursor row in pixels
        int offset = d->horiz_scroll_offset_;
-       int const MARGIN = 2 * theFontMetrics(d->cursor_.real_current_font).em();
-       //lyxerr << "cur_x=" << cur_x << ", offset=" << offset << ", margin=" << MARGIN << endl;
-       if (cur_x < offset + MARGIN) {
-               // scroll right
-               offset = cur_x - MARGIN;
-       } else if (cur_x > offset + workWidth() - MARGIN) {
-               // scroll left
-               offset = cur_x - workWidth() + MARGIN;
+       int const MARGIN = 2 * theFontMetrics(d->cursor_.real_current_font).em()
+                          + row.right_margin;
+       if (row.right_x() <= workWidth() - row.right_margin) {
+               // Row is narrower than the work area, no offset needed.
+               offset = 0;
+       } else {
+               if (cur_x - offset < MARGIN) {
+                       // cursor would be too far right
+                       offset = cur_x - MARGIN;
+               } else if (cur_x - offset > workWidth() - MARGIN) {
+                       // cursor would be too far left
+                       offset = cur_x - workWidth() + MARGIN;
+               }
+               // Correct the offset to make sure that we do not scroll too much
+               if (offset < 0)
+                       offset = 0;
+               if (row.right_x() - offset < workWidth() - row.right_margin)
+                       offset = row.right_x() - workWidth() + row.right_margin;
        }
 
-       if (offset < row.left_margin || row.width() <= workWidth())
-               offset = 0;
+       //lyxerr << "cur_x=" << cur_x << ", offset=" << offset << ", row.wid=" << row.width() << ", margin=" << MARGIN << endl;
 
        if (offset != d->horiz_scroll_offset_)
                LYXERR(Debug::PAINTING, "Horiz. scroll offset changed from "
@@ -3021,12 +3201,12 @@ void BufferView::checkCursorScrollOffset()
 }
 
 
-void BufferView::draw(frontend::Painter & pain)
+void BufferView::draw(frontend::Painter & pain, bool paint_caret)
 {
        if (height_ == 0 || width_ == 0)
                return;
-       LYXERR(Debug::PAINTING, "\t\t*** START DRAWING ***");
-
+       LYXERR(Debug::PAINTING, (pain.isNull() ? "\t\t--- START NODRAW ---"
+                                : "\t\t*** START DRAWING ***"));
        Text & text = buffer_.text();
        TextMetrics const & tm = d->text_metrics_[&text];
        int const y = tm.first().second->position();
@@ -3039,12 +3219,18 @@ void BufferView::draw(frontend::Painter & pain)
        switch (d->update_strategy_) {
 
        case NoScreenUpdate:
-               // If no screen painting is actually needed, only some the different
-               // coordinates of insets and paragraphs needs to be updated.
+               // no screen painting is actually needed. In nodraw stage
+               // however, the different coordinates of insets and paragraphs
+               // needs to be updated.
                LYXERR(Debug::PAINTING, "Strategy: NoScreenUpdate");
-               pi.full_repaint = true;
-               pi.pain.setDrawingEnabled(false);
-               tm.draw(pi, 0, y);
+               pi.full_repaint = false;
+               if (pain.isNull()) {
+                       pi.full_repaint = true;
+                       tm.draw(pi, 0, y);
+               } else {
+                       pi.full_repaint = false;
+                       tm.draw(pi, 0, y);
+               }
                break;
 
        case SingleParUpdate:
@@ -3089,7 +3275,8 @@ void BufferView::draw(frontend::Painter & pain)
                }
                break;
        }
-       LYXERR(Debug::PAINTING, "\n\t\t*** END DRAWING  ***");
+       LYXERR(Debug::PAINTING, (pain.isNull() ? "\t\t --- END NODRAW ---"
+                               : "\t\t *** END DRAWING ***"));
 
        // The scrollbar needs an update.
        updateScrollbar();
@@ -3100,13 +3287,29 @@ void BufferView::draw(frontend::Painter & pain)
        for (pit_type pit = firstpm.first; pit <= lastpm.first; ++pit) {
                ParagraphMetrics const & pm = tm.parMetrics(pit);
                if (pm.position() + pm.descent() > 0) {
+                       if (d->anchor_pit_ != pit
+                           || d->anchor_ypos_ != pm.position())
+                               LYXERR(Debug::PAINTING, "Found new anchor pit = " << d->anchor_pit_
+                                      << "  anchor ypos = " << d->anchor_ypos_);
                        d->anchor_pit_ = pit;
                        d->anchor_ypos_ = pm.position();
                        break;
                }
        }
-       LYXERR(Debug::PAINTING, "Found new anchor pit = " << d->anchor_pit_
-               << "  anchor ypos = " << d->anchor_ypos_);
+       if (!pain.isNull()) {
+               // reset the update flags, everything has been done
+               d->update_flags_ = Update::None;
+       }
+
+       // 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) {
+               Row const & caret_row = d->cursor_.textRow();
+               caret_row.changed(true);
+       }
 }