]> git.lyx.org Git - lyx.git/blobdiff - src/BufferView.cpp
Account for old versions of Pygments
[lyx.git] / src / BufferView.cpp
index 2c53809d211cd633a48abb6af34784a79055f43c..77ab989d193962f602d96435b8c0fbc1f41e0128 100644 (file)
@@ -35,6 +35,7 @@
 #include "Language.h"
 #include "LaTeXFeatures.h"
 #include "LayoutFile.h"
+#include "Length.h"
 #include "Lexer.h"
 #include "LyX.h"
 #include "LyXAction.h"
 #include "Paragraph.h"
 #include "ParagraphParameters.h"
 #include "ParIterator.h"
+#include "RowPainter.h"
 #include "Session.h"
 #include "Text.h"
 #include "TextClass.h"
 #include "TextMetrics.h"
 #include "TexRow.h"
 #include "TocBackend.h"
-#include "VSpace.h"
 #include "WordLangTuple.h"
 
 #include "insets/InsetBibtex.h"
+#include "insets/InsetCitation.h"
 #include "insets/InsetCommand.h" // ChangeRefs
 #include "insets/InsetExternal.h"
 #include "insets/InsetGraphics.h"
+#include "insets/InsetNote.h"
 #include "insets/InsetRef.h"
 #include "insets/InsetText.h"
-#include "insets/InsetNote.h"
+
+#include "mathed/MathData.h"
 
 #include "frontends/alert.h"
 #include "frontends/Application.h"
 #include "frontends/Painter.h"
 #include "frontends/Selection.h"
 
-#include "graphics/Previews.h"
-
 #include "support/convert.h"
 #include "support/debug.h"
 #include "support/ExceptionMessage.h"
 #include "support/filetools.h"
 #include "support/gettext.h"
+#include "support/lassert.h"
 #include "support/lstrings.h"
 #include "support/Package.h"
 #include "support/types.h"
@@ -108,9 +111,7 @@ T * getInsetByCode(Cursor const & cur, InsetCode code)
 }
 
 
-bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
-       bool same_content);
-
+/// Note that comparing contents can only be used for InsetCommand
 bool findNextInset(DocIterator & dit, vector<InsetCode> const & codes,
        docstring const & contents)
 {
@@ -118,12 +119,17 @@ bool findNextInset(DocIterator & dit, vector<InsetCode> const & codes,
 
        while (tmpdit) {
                Inset const * inset = tmpdit.nextInset();
-               if (inset
-                   && std::find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()
-                   && (contents.empty() ||
-                   static_cast<InsetCommand const *>(inset)->getFirstNonOptParam() == contents)) {
-                       dit = tmpdit;
-                       return true;
+               if (inset) {
+                       bool const valid_code = std::find(codes.begin(), codes.end(),
+                               inset->lyxCode()) != codes.end();
+                       InsetCommand const * ic = inset->asInsetCommand();
+                       bool const same_or_no_contents =  contents.empty()
+                               || (ic && (ic->getFirstNonOptParam() == contents));
+
+                       if (valid_code && same_or_no_contents) {
+                               dit = tmpdit;
+                               return true;
+                       }
                }
                tmpdit.forwardInset();
        }
@@ -133,6 +139,7 @@ bool findNextInset(DocIterator & dit, vector<InsetCode> const & codes,
 
 
 /// Looks for next inset with one of the given codes.
+/// Note that same_content can only be used for InsetCommand
 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
        bool same_content)
 {
@@ -142,11 +149,14 @@ bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
        if (!tmpdit)
                return false;
 
-       if (same_content) {
-               Inset const * inset = tmpdit.nextInset();
-               if (inset
-                   && std::find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()) {
-                       contents = static_cast<InsetCommand const *>(inset)->getFirstNonOptParam();
+       Inset const * inset = tmpdit.nextInset();
+       if (same_content && inset) {
+               InsetCommand const * ic = inset->asInsetCommand();
+               if (ic) {
+                       bool const valid_code = std::find(codes.begin(), codes.end(),
+                               ic->lyxCode()) != codes.end();
+                       if (valid_code)
+                               contents = ic->getFirstNonOptParam();
                }
        }
 
@@ -217,12 +227,17 @@ enum ScreenUpdateStrategy {
 
 struct BufferView::Private
 {
-       Private(BufferView & bv): wh_(0), cursor_(bv),
+       Private(BufferView & bv) : update_strategy_(NoScreenUpdate),
+               wh_(0), cursor_(bv),
                anchor_pit_(0), anchor_ypos_(0),
                inlineCompletionUniqueChars_(0),
-               last_inset_(0), mouse_position_cache_(),
-               bookmark_edit_position_(-1), gui_(0)
-       {}
+               last_inset_(0), clickable_inset_(false),
+               mouse_position_cache_(),
+               bookmark_edit_position_(-1), gui_(0),
+               horiz_scroll_offset_(0)
+       {
+               xsel_cache_.set = false;
+       }
 
        ///
        ScrollbarParameters scrollbarParameters_;
@@ -262,7 +277,9 @@ struct BufferView::Private
        /** kept to send setMouseHover(false).
          * Not owned, so don't delete.
          */
-       Inset * last_inset_;
+       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
@@ -284,6 +301,16 @@ struct BufferView::Private
 
        ///
        map<string, Inset *> edited_insets_;
+
+       /// When the row where the cursor lies is scrolled, this
+       /// contains the scroll offset
+       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_;
 };
 
 
@@ -299,8 +326,7 @@ BufferView::BufferView(Buffer & buf)
        d->cursor_.resetAnchor();
        d->cursor_.setCurrentFont();
 
-       if (graphics::Previews::status() != LyXRC::PREVIEW_OFF)
-               thePreviews().generateBufferPreviews(buffer_);
+       buffer_.updatePreviews();
 }
 
 
@@ -315,9 +341,9 @@ BufferView::~BufferView()
        fp.pit = d->cursor_.bottom().pit();
        fp.pos = d->cursor_.bottom().pos();
        theSession().lastFilePos().save(buffer_.fileName(), fp);
-       
+
        if (d->last_inset_)
-               d->last_inset_->setMouseHover(this, false);     
+               d->last_inset_->setMouseHover(this, false);
 
        delete d;
 }
@@ -325,11 +351,12 @@ 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;
 }
@@ -341,15 +368,22 @@ 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;
 }
 
 
@@ -389,7 +423,7 @@ Buffer const & BufferView::buffer() const
 }
 
 
-bool BufferView::fitCursor()
+bool BufferView::needsFitCursor() const
 {
        if (cursorStatus(d->cursor_) == CUR_INSIDE) {
                frontend::FontMetrics const & fm =
@@ -407,7 +441,7 @@ bool BufferView::fitCursor()
 void BufferView::processUpdateFlags(Update::flags flags)
 {
        // This is close to a hot-path.
-       LYXERR(Debug::DEBUG, "BufferView::processUpdateFlags()"
+       LYXERR(Debug::PAINTING, "BufferView::processUpdateFlags()"
                << "[fitcursor = " << (flags & Update::FitCursor)
                << ", forceupdate = " << (flags & Update::Force)
                << ", singlepar = " << (flags & Update::SinglePar)
@@ -420,6 +454,7 @@ void BufferView::processUpdateFlags(Update::flags flags)
        // 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?
 
        // Case when no explicit update is requested.
        if (!flags) {
@@ -437,7 +472,7 @@ void BufferView::processUpdateFlags(Update::flags flags)
        if (flags == Update::FitCursor
                || flags == (Update::Decoration | Update::FitCursor)) {
                // tell the frontend to update the screen if needed.
-               if (fitCursor()) {
+               if (needsFitCursor()) {
                        showCursor();
                        return;
                }
@@ -446,8 +481,10 @@ void BufferView::processUpdateFlags(Update::flags flags)
                        buffer_.changed(false);
                        return;
                }
-               // no screen update is needed.
+               // 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;
        }
 
@@ -467,7 +504,7 @@ void BufferView::processUpdateFlags(Update::flags flags)
        // This is done at draw() time. So we need a redraw!
        buffer_.changed(false);
 
-       if (fitCursor()) {
+       if (needsFitCursor()) {
                // The cursor is off screen so ensure it is visible.
                // refresh it:
                showCursor();
@@ -488,7 +525,7 @@ void BufferView::updateScrollbar()
        d->scrollbarParameters_.page_step = height_;
 
        Text & t = buffer_.text();
-       TextMetrics & tm = d->text_metrics_[&t];                
+       TextMetrics & tm = d->text_metrics_[&t];
 
        LYXERR(Debug::GUI, " Updating scrollbar: height: "
                << t.paragraphs().size()
@@ -529,12 +566,17 @@ 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;
 }
 
 
@@ -555,7 +597,7 @@ docstring BufferView::toolTip(int x, int y) const
 }
 
 
-docstring BufferView::contextMenu(int x, int y) const
+string BufferView::contextMenu(int x, int y) const
 {
        //If there is a selection, return the containing inset menu
        if (d->cursor_.selection())
@@ -570,17 +612,19 @@ docstring 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;
+       if (abs(value) <= 2 * height_) {
+               d->anchor_ypos_ -= value;
                buffer_.changed(true);
                updateHoveredInset();
                return;
@@ -648,7 +692,7 @@ void BufferView::setCursorFromScrollbar()
        case CUR_INSIDE:
                int const y = getPos(oldcur).y_;
                newy = min(last, max(y, first));
-               if (y == newy) 
+               if (y == newy)
                        return;
        }
        // We reset the cursor because cursorStatus() does not
@@ -661,7 +705,10 @@ void BufferView::setCursorFromScrollbar()
        // FIXME: Care about the d->cursor_ flags to redraw if needed
        Cursor old = d->cursor_;
        mouseSetCursor(cur);
-       bool badcursor = notifyCursorLeavesOrEnters(old, d->cursor_);
+       // the DEPM call in mouseSetCursor() might have destroyed the
+       // paragraph the cursor is in.
+       bool badcursor = old.fixIfBroken();
+       badcursor |= notifyCursorLeavesOrEnters(old, d->cursor_);
        if (badcursor)
                d->cursor_.fixIfBroken();
 }
@@ -673,6 +720,8 @@ Change const BufferView::getCurrentChange() const
                return Change(Change::UNCHANGED);
 
        DocIterator dit = d->cursor_.selectionBegin();
+       // The selected content might have been changed (see #7685)
+       dit = dit.getInnerText();
        return dit.paragraph().lookupChange(dit.pos());
 }
 
@@ -761,7 +810,7 @@ bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
        // the bookmark.
        if (bottom_pit < int(buffer_.paragraphs().size())) {
                dit = doc_iterator_begin(&buffer_);
-                               
+
                dit.pit() = bottom_pit;
                dit.pos() = min(bottom_pos, dit.paragraph().size());
                success = true;
@@ -772,11 +821,13 @@ bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
                setCursor(dit);
                // set the current font.
                d->cursor_.setCurrentFont();
+               // Do not forget to reset the anchor (see #9912)
+               d->cursor_.resetAnchor();
                // 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 (fitCursor())
+               if (needsFitCursor())
                        showCursor();
        }
 
@@ -786,14 +837,12 @@ bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
 
 void BufferView::translateAndInsert(char_type c, Text * t, Cursor & cur)
 {
-       if (lyxrc.rtl_support) {
-               if (d->cursor_.real_current_font.isRightToLeft()) {
-                       if (d->intl_.keymap == Intl::PRIMARY)
-                               d->intl_.keyMapSec();
-               } else {
-                       if (d->intl_.keymap == Intl::SECONDARY)
-                               d->intl_.keyMapPrim();
-               }
+       if (d->cursor_.real_current_font.isRightToLeft()) {
+               if (d->intl_.keymap == Intl::PRIMARY)
+                       d->intl_.keyMapSec();
+       } else {
+               if (d->intl_.keymap == Intl::SECONDARY)
+                       d->intl_.keyMapPrim();
        }
 
        d->intl_.getTransManager().translateAndInsert(c, t, cur);
@@ -837,7 +886,7 @@ void BufferView::scrollToCursor()
 }
 
 
-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.
@@ -865,7 +914,7 @@ bool BufferView::scrollToCursor(DocIterator const & dit, bool recenter)
 
        if (tm.contains(bot_pit)) {
                ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
-               LASSERT(!pm.rows().empty(), /**/);
+               LBUFERR(!pm.rows().empty());
                // FIXME: smooth scrolling doesn't work in mathed.
                CursorSlice const & cs = dit.innerTextSlice();
                int offset = coordOffset(dit).y_;
@@ -876,20 +925,28 @@ bool BufferView::scrollToCursor(DocIterator const & dit, bool recenter)
                if (recenter)
                        scrolled = scroll(ypos - height_/2);
 
+               // We try to visualize the whole row, if the row height is larger than
+               // the screen height, we scroll to a heuristic value of height_ / 4.
+               // FIXME: This heuristic value should be replaced by a recursive search
+               // for a row in the inset that can be visualized completely.
+               else if (row_dim.height() > height_) {
+                       if (ypos < defaultRowHeight())
+                               scrolled = scroll(ypos - height_ / 4);
+                       else if (ypos > height_ - defaultRowHeight())
+                               scrolled = scroll(ypos - 3 * height_ / 4);
+               }
+
                // If the top part of the row falls of the screen, we scroll
                // up to align the top of the row with the top of the screen.
-               else if (ypos - row_dim.ascent() < 0)
-                       scrolled = scrollUp(-ypos + row_dim.ascent());
+               else if (ypos - row_dim.ascent() < 0 && ypos < height_) {
+                       int ynew = row_dim.ascent();
+                       scrolled = scrollUp(ynew - ypos);
+               }
 
                // If the bottom of the row falls of the screen, we scroll down.
-               // However, we have to be careful not to scroll that much that
-               // the top falls of the screen.
-               else if (ypos + row_dim.descent() > height_) {
+               else if (ypos + row_dim.descent() > height_ && ypos > 0) {
                        int ynew = height_ - row_dim.descent();
-                       if (ynew < row_dim.ascent())
-                               ynew = row_dim.ascent();
-                       int const scroll = ypos - ynew;
-                       scrolled = scrollDown(scroll);
+                       scrolled = scrollDown(ypos - ynew);
                }
 
                // else, nothing to do, the cursor is already visible so we just return.
@@ -924,10 +981,18 @@ bool BufferView::scrollToCursor(DocIterator const & dit, bool recenter)
 }
 
 
-void BufferView::updateDocumentClass(DocumentClass const * const olddc)
+void BufferView::makeDocumentClass()
+{
+       DocumentClassConstPtr olddc = buffer_.params().documentClassPtr();
+       buffer_.params().makeDocumentClass();
+       updateDocumentClass(olddc);
+}
+
+
+void BufferView::updateDocumentClass(DocumentClassConstPtr olddc)
 {
        message(_("Converting document to new document class..."));
-       
+
        StableDocIterator backcur(d->cursor_);
        ErrorList & el = buffer_.errorList("Class Switch");
        cap::switchBetweenClasses(
@@ -939,7 +1004,8 @@ void BufferView::updateDocumentClass(DocumentClass const * const olddc)
        buffer_.errors("Class Switch");
 }
 
-/** Return the change status at cursor position, taking in account the
+
+/** Return the change status at cursor position, taking into account the
  * status at each level of the document iterator (a table in a deleted
  * footnote is deleted).
  * When \param outer is true, the top slice is not looked at.
@@ -969,7 +1035,10 @@ 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;
        }
@@ -993,8 +1062,8 @@ bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
        // FIXME: This is a bit problematic because we don't check if this is
        // a document BufferView or not for these LFUNs. We probably have to
        // dispatch both to currentBufferView() and, if that fails,
-       // to documentBufferView(); same as we do know for current Buffer and
-       // document Buffer. Ideally those LFUN should go to Buffer as they*
+       // to documentBufferView(); same as we do now for current Buffer and
+       // document Buffer. Ideally those LFUN should go to Buffer as they
        // operate on the full Buffer and the cursor is only needed either for
        // an Undo record or to restore a cursor position. But we don't know
        // how to do that inside Buffer of course.
@@ -1008,14 +1077,26 @@ bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
                break;
 
        case LFUN_UNDO:
-               flag.setEnabled(buffer_.undo().hasUndoStack());
+               // We do not use the LyXAction flag for readonly because Undo sets the
+               // buffer clean/dirty status by itself.
+               flag.setEnabled(!buffer_.isReadonly() && buffer_.undo().hasUndoStack());
                break;
        case LFUN_REDO:
-               flag.setEnabled(buffer_.undo().hasRedoStack());
+               // We do not use the LyXAction flag for readonly because Redo sets the
+               // buffer clean/dirty status by itself.
+               flag.setEnabled(!buffer_.isReadonly() && buffer_.undo().hasRedoStack());
                break;
-       case LFUN_FILE_INSERT:
        case LFUN_FILE_INSERT_PLAINTEXT_PARA:
-       case LFUN_FILE_INSERT_PLAINTEXT:
+       case LFUN_FILE_INSERT_PLAINTEXT: {
+               docstring const fname = cmd.argument();
+               if (!FileName::isAbsolute(to_utf8(fname))) {
+                       flag.message(_("Absolute filename expected."));
+                       return false;
+               }
+               flag.setEnabled(cur.inTexted());
+               break;
+       }
+       case LFUN_FILE_INSERT:
        case LFUN_BOOKMARK_SAVE:
                // FIXME: Actually, these LFUNS should be moved to Text
                flag.setEnabled(cur.inTexted());
@@ -1030,7 +1111,6 @@ bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
        case LFUN_WORD_FIND:
        case LFUN_WORD_FIND_FORWARD:
        case LFUN_WORD_FIND_BACKWARD:
-       case LFUN_WORD_FINDADV:
        case LFUN_WORD_REPLACE:
        case LFUN_MARK_OFF:
        case LFUN_MARK_ON:
@@ -1040,28 +1120,26 @@ bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
        case LFUN_BIBTEX_DATABASE_ADD:
        case LFUN_BIBTEX_DATABASE_DEL:
        case LFUN_STATISTICS:
-       case LFUN_BRANCH_ADD_INSERT:
        case LFUN_KEYMAP_OFF:
        case LFUN_KEYMAP_PRIMARY:
        case LFUN_KEYMAP_SECONDARY:
        case LFUN_KEYMAP_TOGGLE:
+       case LFUN_INSET_SELECT_ALL:
                flag.setEnabled(true);
                break;
 
-       case LFUN_LABEL_GOTO: {
-               flag.setEnabled(!cmd.argument().empty()
-                   || getInsetByCode<InsetRef>(cur, REF_CODE));
+       case LFUN_WORD_FINDADV: {
+               FindAndReplaceOptions opt;
+               istringstream iss(to_utf8(cmd.argument()));
+               iss >> opt;
+               flag.setEnabled(opt.repl_buf_name.empty()
+                               || !buffer_.isReadonly());
                break;
        }
 
-       case LFUN_CHANGES_TRACK:
-               flag.setEnabled(true);
-               flag.setOnOff(buffer_.params().trackChanges);
-               break;
-
-       case LFUN_CHANGES_OUTPUT:
-               flag.setEnabled(true);
-               flag.setOnOff(buffer_.params().outputChanges);
+       case LFUN_LABEL_GOTO:
+               flag.setEnabled(!cmd.argument().empty()
+                   || getInsetByCode<InsetRef>(cur, REF_CODE));
                break;
 
        case LFUN_CHANGES_MERGE:
@@ -1069,22 +1147,8 @@ bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
        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:
@@ -1107,13 +1171,17 @@ bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
                flag.setEnabled(cur.inset().allowParagraphCustomization(cur.idx()));
                break;
 
+       case LFUN_BRANCH_ADD_INSERT:
+               flag.setEnabled(!(cur.inTexted() && cur.paragraph().isPassThru()));
+               break;
+
        case LFUN_DIALOG_SHOW_NEW_INSET:
                // FIXME: this is wrong, but I do not understand the
                // intent (JMarc)
                if (cur.inset().lyxCode() == CAPTION_CODE)
                        return cur.inset().getStatus(cur, cmd, flag);
                // FIXME we should consider passthru paragraphs too.
-               flag.setEnabled(!cur.inset().getLayout().isPassThru());
+               flag.setEnabled(!(cur.inTexted() && cur.paragraph().isPassThru()));
                break;
 
        case LFUN_CITATION_INSERT: {
@@ -1162,20 +1230,14 @@ void BufferView::editInset(string const & name, Inset * inset)
 
 void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
 {
-       //lyxerr << [ cmd = " << cmd << "]" << endl;
-
-       // Make sure that the cached BufferView is correct.
-       LYXERR(Debug::ACTION, " action[" << cmd.action() << ']'
-               << " arg[" << to_utf8(cmd.argument()) << ']'
-               << " x[" << cmd.x() << ']'
-               << " y[" << cmd.y() << ']'
-               << " button[" << cmd.button() << ']');
+       LYXERR(Debug::ACTION, "BufferView::dispatch: cmd: " << cmd);
 
        string const argument = to_utf8(cmd.argument());
        Cursor & cur = d->cursor_;
+       Cursor old = cur;
 
        // Don't dispatch function that does not apply to internal buffers.
-       if (buffer_.isInternal() 
+       if (buffer_.isInternal()
            && lyxaction.funcHasFlag(cmd.action(), LyXAction::NoInternal))
                return;
 
@@ -1187,8 +1249,8 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
        switch (act) {
 
        case LFUN_BUFFER_PARAMS_APPLY: {
-               DocumentClass const * const oldClass = buffer_.params().documentClassPtr();
-               cur.recordUndoFullDocument();
+               DocumentClassConstPtr olddc = buffer_.params().documentClassPtr();
+               cur.recordUndoBufferParams();
                istringstream ss(to_utf8(cmd.argument()));
                Lexer lex;
                lex.setStream(ss);
@@ -1198,50 +1260,53 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                                                << unknown_tokens << " unknown token"
                                                << (unknown_tokens == 1 ? "" : "s"));
                }
-               updateDocumentClass(oldClass);
-                       
+               updateDocumentClass(olddc);
+
                // We are most certainly here because of a change in the document
                // It is then better to make sure that all dialogs are in sync with
                // current document settings.
-               dr.update(Update::Force | Update::FitCursor);
+               dr.screenUpdate(Update::Force | Update::FitCursor);
                dr.forceBufferUpdate();
                break;
        }
-               
+
        case LFUN_LAYOUT_MODULES_CLEAR: {
-               DocumentClass const * const oldClass =
-                       buffer_.params().documentClassPtr();
-               cur.recordUndoFullDocument();
+               // FIXME: this modifies the document in cap::switchBetweenClasses
+               //  without calling recordUndo. Fix this before using
+               //  recordUndoBufferParams().
+               cur.recordUndoFullBuffer();
                buffer_.params().clearLayoutModules();
-               buffer_.params().makeDocumentClass();
-               updateDocumentClass(oldClass);
-               dr.update(Update::Force | Update::FitCursor);
+               makeDocumentClass();
+               dr.screenUpdate(Update::Force);
                dr.forceBufferUpdate();
                break;
        }
 
        case LFUN_LAYOUT_MODULE_ADD: {
                BufferParams const & params = buffer_.params();
-               if (!params.moduleCanBeAdded(argument)) {
-                       LYXERR0("Module `" << argument << 
+               if (!params.layoutModuleCanBeAdded(argument)) {
+                       LYXERR0("Module `" << argument <<
                                "' cannot be added due to failed requirements or "
                                "conflicts with installed modules.");
                        break;
                }
-               DocumentClass const * const oldClass = params.documentClassPtr();
-               cur.recordUndoFullDocument();
+               // FIXME: this modifies the document in cap::switchBetweenClasses
+               //  without calling recordUndo. Fix this before using
+               //  recordUndoBufferParams().
+               cur.recordUndoFullBuffer();
                buffer_.params().addLayoutModule(argument);
-               buffer_.params().makeDocumentClass();
-               updateDocumentClass(oldClass);
-               dr.update(Update::Force | Update::FitCursor);
+               makeDocumentClass();
+               dr.screenUpdate(Update::Force);
                dr.forceBufferUpdate();
                break;
        }
 
        case LFUN_TEXTCLASS_APPLY: {
-               bool success = LayoutFileList::get().load(argument, buffer_.temppath());
-               if (!success)
-                       success = LayoutFileList::get().load(argument, buffer_.filePath());
+               // since this shortcircuits, the second call is made only if
+               // the first fails
+               bool const success =
+                       LayoutFileList::get().load(argument, buffer_.temppath()) ||
+                       LayoutFileList::get().load(argument, buffer_.filePath());
                if (!success) {
                        docstring s = bformat(_("The document class `%1$s' "
                                                 "could not be loaded."), from_utf8(argument));
@@ -1257,22 +1322,24 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                        break;
 
                // Save the old, possibly modular, layout for use in conversion.
-               DocumentClass const * const oldDocClass =
-                       buffer_.params().documentClassPtr();
-               cur.recordUndoFullDocument();
+               // FIXME: this modifies the document in cap::switchBetweenClasses
+               //  without calling recordUndo. Fix this before using
+               //  recordUndoBufferParams().
+               cur.recordUndoFullBuffer();
                buffer_.params().setBaseClass(argument);
-               buffer_.params().makeDocumentClass();
-               updateDocumentClass(oldDocClass);
-               dr.update(Update::Force | Update::FitCursor);
+               makeDocumentClass();
+               dr.screenUpdate(Update::Force);
                dr.forceBufferUpdate();
                break;
        }
 
        case LFUN_TEXTCLASS_LOAD: {
-               bool success = LayoutFileList::get().load(argument, buffer_.temppath());
-               if (!success) 
-                       success = LayoutFileList::get().load(argument, buffer_.filePath());
-               if (!success) {                 
+               // since this shortcircuits, the second call is made only if
+               // the first fails
+               bool const success =
+                       LayoutFileList::get().load(argument, buffer_.temppath()) ||
+                       LayoutFileList::get().load(argument, buffer_.filePath());
+               if (!success) {
                        docstring s = bformat(_("The document class `%1$s' "
                                                 "could not be loaded."), from_utf8(argument));
                        frontend::Alert::error(_("Could not load class"), s);
@@ -1281,13 +1348,11 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
        }
 
        case LFUN_LAYOUT_RELOAD: {
-               DocumentClass const * const oldClass = buffer_.params().documentClassPtr();
                LayoutFileIndex bc = buffer_.params().baseClassID();
                LayoutFileList::get().reset(bc);
                buffer_.params().setBaseClass(bc);
-               buffer_.params().makeDocumentClass();
-               updateDocumentClass(oldClass);
-               dr.update(Update::Force | Update::FitCursor);
+               makeDocumentClass();
+               dr.screenUpdate(Update::Force);
                dr.forceBufferUpdate();
                break;
        }
@@ -1298,8 +1363,18 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                if (!cur.textUndo())
                        dr.setMessage(_("No further undo information"));
                else
-                       dr.update(Update::Force | Update::FitCursor);
+                       dr.screenUpdate(Update::Force | Update::FitCursor);
                dr.forceBufferUpdate();
+               // we only need to do this if we have deleted or restored a
+               // BiBTeX inset. but there is no other place to do it. one
+               // obvious idea is to try to do it in a copy constructor for
+               // InsetBibTeX, but when that is invoked, the buffer_ member 
+               // is not yet set. another idea is to look at the InsetLists
+               // of the various paragraphs. but we'd have to recurse through
+               // the contained insets to make that work. it doesn't seem to
+               // be worth it, as this will not happen that often.
+               buffer().invalidateBibfileCache();
+               buffer().removeBiblioTempFiles();
                break;
 
        case LFUN_REDO:
@@ -1308,8 +1383,11 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                if (!cur.textRedo())
                        dr.setMessage(_("No further redo information"));
                else
-                       dr.update(Update::Force | Update::FitCursor);
+                       dr.screenUpdate(Update::Force | Update::FitCursor);
                dr.forceBufferUpdate();
+               // see above
+               buffer().invalidateBibfileCache();
+               buffer().removeBiblioTempFiles();
                break;
 
        case LFUN_FONT_STATE:
@@ -1331,33 +1409,53 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                                saveBookmark(0);
                        }
                }
-               if (!label.empty())
+               if (!label.empty()) {
                        gotoLabel(label);
+                       // at the moment, this is redundant, since gotoLabel will
+                       // eventually call LFUN_PARAGRAPH_GOTO, but it seems best
+                       // to have it here.
+                       dr.screenUpdate(Update::Force | Update::FitCursor);
+               }
                break;
        }
-       
+
        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)) {
 
-                       DocIterator dit = b->getParFromID(id);
-                       if (dit.atEnd()) {
+                       Cursor cur(*this);
+                       cur.setCursor(b->getParFromID(id));
+                       if (cur.atEnd()) {
                                LYXERR(Debug::INFO, "No matching paragraph found! [" << id << "].");
                                ++i;
                                continue;
                        }
-                       LYXERR(Debug::INFO, "Paragraph " << dit.paragraph().id()
+                       LYXERR(Debug::INFO, "Paragraph " << cur.paragraph().id()
                                << " found in buffer `"
                                << b->absFileName() << "'.");
 
                        if (b == &buffer_) {
-                               // Set the cursor
-                               dit.pos() = pos;
-                               setCursor(dit);
-                               dr.update(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(
@@ -1381,48 +1479,21 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                break;
        }
 
-       case LFUN_CHANGES_TRACK:
-               buffer_.params().trackChanges = !buffer_.params().trackChanges;
-               break;
-
-       case LFUN_CHANGES_OUTPUT:
-               buffer_.params().outputChanges = !buffer_.params().outputChanges;
-               if (buffer_.params().outputChanges) {
-                       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:
-               dr.update(Update::Force | Update::FitCursor);
+               dr.screenUpdate(Update::Force | Update::FitCursor);
                break;
-       
+
        case LFUN_CHANGE_PREVIOUS:
                findPreviousChange(this);
                // FIXME: Move this LFUN to Buffer so that we don't have to do this:
-               dr.update(Update::Force | Update::FitCursor);
+               dr.screenUpdate(Update::Force | Update::FitCursor);
                break;
 
        case LFUN_CHANGES_MERGE:
                if (findNextChange(this) || findPreviousChange(this)) {
-                       dr.update(Update::Force | Update::FitCursor);
+                       dr.screenUpdate(Update::Force | Update::FitCursor);
                        dr.forceBufferUpdate();
                        showDialog("changes");
                }
@@ -1435,8 +1506,9 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                buffer_.text().cursorBottom(cur);
                // accept everything in a single step to support atomic undo
                buffer_.text().acceptOrRejectChanges(cur, Text::ACCEPT);
+               cur.resetAnchor();
                // FIXME: Move this LFUN to Buffer so that we don't have to do this:
-               dr.update(Update::Force | Update::FitCursor);
+               dr.screenUpdate(Update::Force | Update::FitCursor);
                dr.forceBufferUpdate();
                break;
 
@@ -1448,13 +1520,16 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                // reject everything in a single step to support atomic undo
                // Note: reject does not work recursively; the user may have to repeat the operation
                buffer_.text().acceptOrRejectChanges(cur, Text::REJECT);
+               cur.resetAnchor();
                // FIXME: Move this LFUN to Buffer so that we don't have to do this:
-               dr.update(Update::Force | Update::FitCursor);
+               dr.screenUpdate(Update::Force | Update::FitCursor);
                dr.forceBufferUpdate();
                break;
 
        case LFUN_WORD_FIND_FORWARD:
        case LFUN_WORD_FIND_BACKWARD: {
+               // FIXME THREAD
+               // Would it maybe be better if this variable were view specific anyway?
                static docstring last_search;
                docstring searched_string;
 
@@ -1471,7 +1546,9 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                bool const fw = act == LFUN_WORD_FIND_FORWARD;
                docstring const data =
                        find2string(searched_string, true, false, fw);
-               find(this, FuncRequest(LFUN_WORD_FIND, data));
+               bool found = lyxfind(this, FuncRequest(LFUN_WORD_FIND, data));
+               if (found)
+                       dr.screenUpdate(Update::Force | Update::FitCursor);
                break;
        }
 
@@ -1483,10 +1560,9 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                        lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, "findreplace"));
                        break;
                }
-               if (find(this, req))
-                       showCursor();
-               else
-                       message(_("String not found!"));
+               if (lyxfind(this, req))
+                       dr.screenUpdate(Update::Force | Update::FitCursor);
+
                d->search_request_cache_ = req;
                break;
        }
@@ -1498,14 +1574,17 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                        DocIterator end = cur.selectionEnd();
                        if (beg.pit() == end.pit()) {
                                for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
-                                       if (!cur.inMathed()
-                                           && cur.paragraph().isDeleted(p))
+                                       if (!cur.inMathed() && cur.paragraph().isDeleted(p)) {
                                                has_deleted = true;
+                                               break;
+                                       }
                                }
                        }
                }
-               replace(this, cmd, has_deleted);
-               dr.forceBufferUpdate();
+               if (lyxreplace(this, cmd, has_deleted)) {
+                       dr.forceBufferUpdate();
+                       dr.screenUpdate(Update::Force | Update::FitCursor);
+               }
                break;
        }
 
@@ -1513,10 +1592,14 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                FindAndReplaceOptions opt;
                istringstream iss(to_utf8(cmd.argument()));
                iss >> opt;
-               if (findAdv(this, opt))
+               if (findAdv(this, opt)) {
+                       dr.screenUpdate(Update::Force | Update::FitCursor);
                        cur.dispatched();
-               else
+                       dispatched = true;
+               } else {
                        cur.undispatched();
+                       dispatched = false;
+               }
                break;
        }
 
@@ -1532,7 +1615,7 @@ 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")));
@@ -1546,7 +1629,7 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
        case LFUN_SCREEN_SHOW_CURSOR:
                showCursor();
                break;
-       
+
        case LFUN_SCREEN_RECENTER:
                recenter();
                break;
@@ -1557,8 +1640,10 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
                                                BIBTEX_CODE);
                if (inset) {
-                       if (inset->addDatabase(cmd.argument()))
-                               buffer_.updateBibfilesCache();
+                       if (inset->addDatabase(cmd.argument())) {
+                               buffer_.invalidateBibfileCache();
+                               dr.forceBufferUpdate();
+                       }
                }
                break;
        }
@@ -1569,8 +1654,10 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
                                                BIBTEX_CODE);
                if (inset) {
-                       if (inset->delDatabase(cmd.argument()))
-                               buffer_.updateBibfilesCache();
+                       if (inset->delDatabase(cmd.argument())) {
+                               buffer_.invalidateBibfileCache();
+                               dr.forceBufferUpdate();
+                       }
                }
                break;
        }
@@ -1584,9 +1671,10 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                        from = doc_iterator_begin(&buffer_);
                        to = doc_iterator_end(&buffer_);
                }
-               int const words = countWords(from, to);
-               int const chars = countChars(from, to, false);
-               int const chars_blanks = countChars(from, to, true);
+               buffer_.updateStatistics(from, to);
+               int const words = buffer_.wordCount();
+               int const chars = buffer_.charCount(false);
+               int const chars_blanks = buffer_.charCount(true);
                docstring message;
                if (cur.selection())
                        message = _("Statistics for the selection:");
@@ -1614,15 +1702,6 @@ 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);
@@ -1639,30 +1718,52 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                        p = Point(0, 0);
                if (act == LFUN_SCREEN_DOWN && scrolled < height_)
                        p = Point(width_, height_);
-               Cursor old = cur;
                bool const in_texted = cur.inTexted();
-               cur.reset();
+               cur.setCursor(doc_iterator_begin(cur.buffer()));
+               cur.selHandle(false);
                buffer_.changed(true);
                updateHoveredInset();
 
                d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_,
-                       true, act == LFUN_SCREEN_UP); 
+                       true, act == LFUN_SCREEN_UP);
                //FIXME: what to do with cur.x_target()?
                bool update = in_texted && cur.bv().checkDepm(cur, old);
                cur.finishUndo();
-               if (update) {
-                       dr.update(Update::Force | Update::FitCursor);
+
+               if (update || cur.mark())
+                       dr.screenUpdate(Update::Force | Update::FitCursor);
+               if (update)
                        dr.forceBufferUpdate();
-               }
                break;
        }
 
-       case LFUN_SCROLL:
-               lfunScroll(cmd);
+       case LFUN_SCROLL: {
+               string const scroll_type = cmd.getArg(0);
+               int scroll_step = 0;
+               if (scroll_type == "line")
+                       scroll_step = d->scrollbarParameters_.single_step;
+               else if (scroll_type == "page")
+                       scroll_step = d->scrollbarParameters_.page_step;
+               else
+                       return;
+               string const scroll_quantity = cmd.getArg(1);
+               if (scroll_quantity == "up")
+                       scrollUp(scroll_step);
+               else if (scroll_quantity == "down")
+                       scrollDown(scroll_step);
+               else {
+                       int const scroll_value = convert<int>(scroll_quantity);
+                       if (scroll_value)
+                               scroll(scroll_step * scroll_value);
+               }
+               buffer_.changed(true);
+               updateHoveredInset();
                dr.forceBufferUpdate();
                break;
+       }
 
        case LFUN_SCREEN_UP_SELECT: {
+               // FIXME: why is the algorithm different from LFUN_SCREEN_UP?
                cur.selHandle(true);
                if (isTopScreen()) {
                        lyx::dispatch(FuncRequest(LFUN_BUFFER_BEGIN_SELECT));
@@ -1675,11 +1776,12 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                        y = getPos(cur).y_;
 
                cur.finishUndo();
-               dr.update(Update::SinglePar | Update::FitCursor);
+               dr.screenUpdate(Update::SinglePar | Update::FitCursor);
                break;
        }
 
        case LFUN_SCREEN_DOWN_SELECT: {
+               // FIXME: why is the algorithm different from LFUN_SCREEN_DOWN?
                cur.selHandle(true);
                if (isBottomScreen()) {
                        lyx::dispatch(FuncRequest(LFUN_BUFFER_END_SELECT));
@@ -1692,7 +1794,48 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                        y = getPos(cur).y_;
 
                cur.finishUndo();
-               dr.update(Update::SinglePar | Update::FitCursor);
+               dr.screenUpdate(Update::SinglePar | Update::FitCursor);
+               break;
+       }
+
+
+       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();
+               // 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.selection(true);
+                       cur.posForward();
+               } else if (cells_selected) {
+                       // At least one complete cell is selected and inset is a table.
+                       // Select all cells
+                       cur.idx() = 0;
+                       cur.pos() = 0;
+                       cur.resetAnchor();
+                       cur.selection(true);
+                       cur.idx() = cur.lastidx();
+                       cur.pos() = cur.lastpos();
+               } else {
+                       // select current cell
+                       cur.pit() = 0;
+                       cur.pos() = 0;
+                       cur.resetAnchor();
+                       cur.selection(true);
+                       cur.pit() = cur.lastpit();
+                       cur.pos() = cur.lastpos();
+               }
+               cur.setCurrentFont();
+               dr.screenUpdate(Update::Force);
                break;
        }
 
@@ -1705,7 +1848,7 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                FuncRequest const fr = lyxaction.lookupFunc(commandstr);
 
                // an arbitrary number to limit number of iterations
-               const int max_iter = 10000;
+               const int max_iter = 100000;
                int iterations = 0;
                Cursor & cur = d->cursor_;
                Cursor const savecur = cur;
@@ -1714,10 +1857,10 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                        cur.forwardInset();
                cur.beginUndoGroup();
                while(cur && iterations < max_iter) {
-                       Inset * ins = cur.nextInset();
+                       Inset * const ins = cur.nextInset();
                        if (!ins)
                                break;
-                       docstring insname = ins->name();
+                       docstring insname = ins->layoutName();
                        while (!insname.empty()) {
                                if (insname == name || name == from_utf8("*")) {
                                        cur.recordUndo();
@@ -1730,12 +1873,22 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                                        break;
                                insname = insname.substr(0, i);
                        }
-                       cur.forwardInset();
+                       // if we did not delete the inset, skip it
+                       if (!cur.nextInset() || cur.nextInset() == ins)
+                               cur.forwardInset();
                }
-               cur.endUndoGroup();
                cur = savecur;
                cur.fixIfBroken();
-               dr.update(Update::Force);
+               /** 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();
 
                if (iterations >= max_iter) {
@@ -1793,7 +1946,7 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                if (decodeInsetParam(name, data, buffer_))
                        lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, name + " " + data));
                else
-                       lyxerr << "Inset type '" << name << 
+                       lyxerr << "Inset type '" << name <<
                        "' not recognized in LFUN_DIALOG_SHOW_NEW_INSET" <<  endl;
                break;
        }
@@ -1813,11 +1966,28 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                        arg = token(argument, '|', 0);
                        opt1 = token(argument, '|', 1);
                }
+
+               // if our cursor is directly in front of or behind a citation inset,
+               // we will instead add the new key to it.
+               Inset * inset = cur.nextInset();
+               if (!inset || inset->lyxCode() != CITE_CODE)
+                       inset = cur.prevInset();
+               if (inset && inset->lyxCode() == CITE_CODE) {
+                       InsetCitation * icite = static_cast<InsetCitation *>(inset);
+                       if (icite->addKey(arg)) {
+                               dr.forceBufferUpdate();
+                               dr.screenUpdate(Update::FitCursor | Update::SinglePar);
+                               if (!opt1.empty())
+                                       LYXERR0("Discarding optional argument to citation-insert.");
+                       }
+                       dispatched = true;
+                       break;
+               }
                InsetCommandParams icp(CITE_CODE);
                icp["key"] = from_utf8(arg);
                if (!opt1.empty())
                        icp["before"] = from_utf8(opt1);
-               string icstr = InsetCommand::params2string("citation", icp);
+               string icstr = InsetCommand::params2string(icp);
                FuncRequest fr(LFUN_INSET_INSERT, icstr);
                lyx::dispatch(fr);
                break;
@@ -1838,19 +2008,66 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                cur.recordUndo();
                FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
                inset->dispatch(cur, fr);
-               dr.update(Update::SinglePar | Update::FitCursor);
-               dr.forceBufferUpdate();
+               dr.screenUpdate(cur.result().screenUpdate());
+               if (cur.result().needBufferUpdate())
+                       dr.forceBufferUpdate();
+               break;
+       }
+
+       // FIXME:
+       // The change of language of buffer belongs to the Buffer class.
+       // We have to do it here because we need a cursor for Undo.
+       // When Undo::recordUndoBufferParams() is implemented someday
+       // LFUN_BUFFER_LANGUAGE should be handled by the Buffer class.
+       case LFUN_BUFFER_LANGUAGE: {
+               Language const * oldL = buffer_.params().language;
+               Language const * newL = languages.getLanguage(argument);
+               if (!newL || oldL == newL)
+                       break;
+               if (oldL->rightToLeft() == newL->rightToLeft()) {
+                       cur.recordUndoFullBuffer();
+                       buffer_.changeLanguage(oldL, newL);
+                       cur.setCurrentFont();
+                       dr.forceBufferUpdate();
+               }
+               break;
+       }
+
+       case LFUN_FILE_INSERT_PLAINTEXT_PARA:
+       case LFUN_FILE_INSERT_PLAINTEXT: {
+               bool const as_paragraph = (act == LFUN_FILE_INSERT_PLAINTEXT_PARA);
+               string const fname = to_utf8(cmd.argument());
+               if (!FileName::isAbsolute(fname))
+                       dr.setMessage(_("Absolute filename expected."));
+               else
+                       insertPlaintextFile(FileName(fname), as_paragraph);
                break;
        }
 
        default:
-               dispatched = false;
+               // OK, so try the Buffer itself...
+               buffer_.dispatch(cmd, dr);
+               dispatched = dr.dispatched();
                break;
        }
 
        buffer_.undo().endUndoGroup();
        dr.dispatched(dispatched);
-       return;
+
+       // NOTE: The code below is copied from Cursor::dispatch. If you
+       // need to modify this, please update the other one too.
+
+       // notify insets we just entered/left
+       if (cursor() != old) {
+               old.beginUndoGroup();
+               old.fixIfBroken();
+               bool badcursor = notifyCursorLeavesOrEnters(old, cursor());
+               if (badcursor) {
+                       cursor().fixIfBroken();
+                       resetInlineCompletionPos();
+               }
+               old.endUndoGroup();
+       }
 }
 
 
@@ -1938,8 +2155,12 @@ Inset const * BufferView::getCoveringInset(Text const & text,
 void BufferView::updateHoveredInset() const
 {
        // Get inset under mouse, if there is one.
-       Inset const * covering_inset = getCoveringInset(buffer_.text(),
-                       d->mouse_position_cache_.x_, d->mouse_position_cache_.y_);
+       int const x = d->mouse_position_cache_.x_;
+       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(*this, x, y);
+
        if (covering_inset == d->last_inset_)
                // Same inset, no need to do anything...
                return;
@@ -1950,22 +2171,20 @@ void BufferView::updateHoveredInset() const
                need_redraw |= d->last_inset_->setMouseHover(this, false);
                d->last_inset_ = 0;
        }
-       
-       // const_cast because of setMouseHover().
-       Inset * inset = const_cast<Inset *>(covering_inset);
-       if (inset && inset->setMouseHover(this, true)) {
+
+       if (covering_inset && covering_inset->setMouseHover(this, true)) {
                need_redraw = true;
-               // Only the insets that accept the hover state, do 
+               // Only the insets that accept the hover state, do
                // clear the last_inset_, so only set the last_inset_
                // member if the hovered setting is accepted.
-               d->last_inset_ = inset;
+               d->last_inset_ = covering_inset;
        }
 
        if (need_redraw) {
                LYXERR(Debug::PAINTING, "Mouse hover detected at: ("
-                               << d->mouse_position_cache_.x_ << ", " 
+                               << d->mouse_position_cache_.x_ << ", "
                                << d->mouse_position_cache_.y_ << ")");
-       
+
                d->update_strategy_ = DecorationUpdate;
 
                // This event (moving without mouse click) is not passed further.
@@ -1979,7 +2198,7 @@ void BufferView::clearLastInset(Inset * inset) const
 {
        if (d->last_inset_ != inset) {
                LYXERR0("Wrong last_inset!");
-               LASSERT(false, /**/);
+               LATTEST(false);
        }
        d->last_inset_ = 0;
 }
@@ -1996,7 +2215,7 @@ 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.
@@ -2014,6 +2233,20 @@ 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();
@@ -2032,47 +2265,27 @@ void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
        if (!inset || !cur.result().dispatched())
                cur.dispatch(cmd);
 
-       cur.endUndoGroup();
-
        // Notify left insets
        if (cur != old) {
-               old.fixIfBroken();
-               bool badcursor = notifyCursorLeavesOrEnters(old, cur);
+               bool badcursor = old.fixIfBroken() | cur.fixIfBroken();
+               badcursor |= notifyCursorLeavesOrEnters(old, cur);
                if (badcursor)
                        cursor().fixIfBroken();
        }
-       
-       // Do we have a selection?
-       theSelection().haveSelection(cursor().selection());
 
-       // If the command has been dispatched,
-       if (cur.result().dispatched() || cur.result().update())
-               processUpdateFlags(cur.result().update());
-}
+       cur.endUndoGroup();
 
+       // Do we have a selection?
+       theSelection().haveSelection(cursor().selection());
 
-void BufferView::lfunScroll(FuncRequest const & cmd)
-{
-       string const scroll_type = cmd.getArg(0);
-       int scroll_step = 0;
-       if (scroll_type == "line")
-               scroll_step = d->scrollbarParameters_.single_step;
-       else if (scroll_type == "page")
-               scroll_step = d->scrollbarParameters_.page_step;
-       else
-               return;
-       string const scroll_quantity = cmd.getArg(1);
-       if (scroll_quantity == "up")
-               scrollUp(scroll_step);
-       else if (scroll_quantity == "down")
-               scrollDown(scroll_step);
-       else {
-               int const scroll_value = convert<int>(scroll_quantity);
-               if (scroll_value)
-                       scroll(scroll_step * scroll_value);
+       if (cur.needBufferUpdate()) {
+               cur.clearBufferUpdate();
+               buffer().updateBuffer();
        }
-       buffer_.changed(true);
-       updateHoveredInset();
+
+       // If the command has been dispatched,
+       if (cur.result().dispatched() || cur.result().screenUpdate())
+               processUpdateFlags(cur.result().screenUpdate());
 }
 
 
@@ -2140,19 +2353,35 @@ int BufferView::scrollUp(int offset)
 }
 
 
-void BufferView::setCursorFromRow(int row)
+bool BufferView::setCursorFromRow(int row)
 {
-       int tmpid = -1;
-       int tmppos = -1;
+       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);
 
-       d->cursor_.reset();
-       if (tmpid == -1)
-               buffer_.text().setCursor(d->cursor_, 0, 0);
-       else
-               buffer_.text().setCursor(d->cursor_, buffer_.getParFromID(tmpid).pit(), tmppos);
-       recenter();
+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);
+       }
+       return true;
 }
 
 
@@ -2178,15 +2407,15 @@ bool BufferView::setCursorFromInset(Inset const * inset)
 
 void BufferView::gotoLabel(docstring const & label)
 {
-       std::vector<Buffer const *> bufs = buffer().allRelatives();
-       std::vector<Buffer const *>::iterator it = bufs.begin();
+       ListOfBuffers bufs = buffer().allRelatives();
+       ListOfBuffers::iterator it = bufs.begin();
        for (; it != bufs.end(); ++it) {
                Buffer const * buf = *it;
 
                // find label
-               Toc & toc = buf->tocBackend().toc("label");
-               TocIterator toc_it = toc.begin();
-               TocIterator end = toc.end();
+               shared_ptr<Toc> toc = buf->tocBackend().toc("label");
+               Toc::const_iterator toc_it = toc->begin();
+               Toc::const_iterator end = toc->end();
                for (; toc_it != end; ++toc_it) {
                        if (label == toc_it->str()) {
                                lyx::dispatch(toc_it->action());
@@ -2205,6 +2434,7 @@ TextMetrics const & BufferView::textMetrics(Text const * t) const
 
 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(
@@ -2235,7 +2465,25 @@ 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
+       // it is not yet clear.
+       // See bug #7394 and r38388.
+       // d->cursor.resetAnchor();
+}
+
+
+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();
 }
 
 
@@ -2257,15 +2505,18 @@ bool BufferView::checkDepm(Cursor & cur, Cursor & old)
 
        d->cursor_ = cur;
 
-       cur.forceBufferUpdate();
+       // we would rather not do this here, but it needs to be done before
+       // the changed() signal is sent.
+       buffer_.updateBuffer();
+
        buffer_.changed(true);
        return true;
 }
 
 
-bool BufferView::mouseSetCursor(Cursor & cur, bool select)
+bool BufferView::mouseSetCursor(Cursor & cur, bool const select)
 {
-       LASSERT(&cur.bv() == this, /**/);
+       LASSERT(&cur.bv() == this, return false);
 
        if (!select)
                // this event will clear selection so we save selection for
@@ -2273,32 +2524,31 @@ bool BufferView::mouseSetCursor(Cursor & cur, bool select)
                cap::saveSelection(cursor());
 
        d->cursor_.macroModeClose();
+       // If a macro has been finalized, the cursor might have been broken
+       cur.fixIfBroken();
 
        // Has the cursor just left the inset?
-       bool leftinset = (&d->cursor_.inset() != &cur.inset());
+       bool const leftinset = (&d->cursor_.inset() != &cur.inset());
        if (leftinset)
                d->cursor_.fixIfBroken();
 
-       // FIXME: shift-mouse selection doesn't work well across insets.
-       bool 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)
@@ -2321,9 +2571,43 @@ void BufferView::putSelectionAt(DocIterator const & cur,
                } else
                        d->cursor_.setSelection(d->cursor_, length);
        }
-       // Ensure a redraw happens in any case because the new selection could 
-       // possibly be on the same screen as the previous selection.
-       processUpdateFlags(Update::Force | Update::FitCursor);
+}
+
+
+bool BufferView::selectIfEmpty(DocIterator & cur)
+{
+       if ((cur.inTexted() && !cur.paragraph().empty())
+           || (cur.inMathed() && !cur.cell().empty()))
+               return false;
+
+       pit_type const beg_pit = cur.pit();
+       if (beg_pit > 0) {
+               // The paragraph associated to this item isn't
+               // the first one, so it can be selected
+               cur.backwardPos();
+       } else {
+               // We have to resort to select the space between the
+               // end of this item and the begin of the next one
+               cur.forwardPos();
+       }
+       if (cur.empty()) {
+               // If it is the only item in the document,
+               // nothing can be selected
+               return false;
+       }
+       pit_type const end_pit = cur.pit();
+       pos_type const end_pos = cur.pos();
+       d->cursor_.clearSelection();
+       d->cursor_.reset();
+       d->cursor_.setCursor(cur);
+       d->cursor_.pit() = beg_pit;
+       d->cursor_.pos() = 0;
+       d->cursor_.selection(false);
+       d->cursor_.resetAnchor();
+       d->cursor_.pit() = end_pit;
+       d->cursor_.pos() = end_pos;
+       d->cursor_.setSelection();
+       return true;
 }
 
 
@@ -2361,7 +2645,7 @@ bool BufferView::singleParUpdate()
        // (if this paragraph contains insets etc., rebreaking will
        // recursively descend)
        tm.redoParagraph(bottom_pit);
-       ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);                
+       ParagraphMetrics const & pm = tm.parMetrics(bottom_pit);
        if (pm.height() != old_height)
                // Paragraph height has changed so we cannot proceed to
                // the singlePar optimisation.
@@ -2398,7 +2682,7 @@ void BufferView::updateMetrics()
        // make sure inline completion pointer is ok
        if (d->inlineCompletionPos_.fixIfBroken())
                d->inlineCompletionPos_ = DocIterator();
-       
+
        if (d->anchor_pit_ >= npit)
                // The anchor pit must have been deleted...
                d->anchor_pit_ = npit - 1;
@@ -2406,19 +2690,19 @@ void BufferView::updateMetrics()
        // Rebreak anchor paragraph.
        tm.redoParagraph(d->anchor_pit_);
        ParagraphMetrics & anchor_pm = tm.par_metrics_[d->anchor_pit_];
-       
+
        // position anchor
        if (d->anchor_pit_ == 0) {
                int scrollRange = d->scrollbarParameters_.max - d->scrollbarParameters_.min;
-               
+
                // 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.
-       }               
+       }
        anchor_pm.setPosition(d->anchor_ypos_);
 
        LYXERR(Debug::PAINTING, "metrics: "
@@ -2470,7 +2754,7 @@ void BufferView::updateMetrics()
 
 void BufferView::insertLyXFile(FileName const & fname)
 {
-       LASSERT(d->cursor_.inTexted(), /**/);
+       LASSERT(d->cursor_.inTexted(), return);
 
        // Get absolute path of file and add ".lyx"
        // to the filename if necessary
@@ -2481,8 +2765,8 @@ void BufferView::insertLyXFile(FileName const & fname)
        message(bformat(_("Inserting document %1$s..."), disp_fn));
 
        docstring res;
-       Buffer buf("", false);
-       if (buf.loadLyXFile(filename)) {
+       Buffer buf(filename.absFileName(), false);
+       if (buf.loadLyXFile() == Buffer::ReadSuccess) {
                ErrorList & el = buffer_.errorList("Parse");
                // Copy the inserted document error list into the current buffer one.
                el = buf.errorList("Parse");
@@ -2497,7 +2781,6 @@ void BufferView::insertLyXFile(FileName const & fname)
        buffer_.changed(true);
        // emit message signal.
        message(bformat(res, disp_fn));
-       buffer_.errors("Parse");
 }
 
 
@@ -2508,19 +2791,19 @@ Point BufferView::coordOffset(DocIterator const & dit) const
        int lastw = 0;
 
        // Addup contribution of nested insets, from inside to outside,
-       // keeping the outer paragraph for a special handling below
+       // keeping the outer paragraph for a special handling below
        for (size_t i = dit.depth() - 1; i >= 1; --i) {
                CursorSlice const & sl = dit[i];
                int xx = 0;
                int yy = 0;
-               
+
                // get relative position inside sl.inset()
                sl.inset().cursorPos(*this, sl, dit.boundary() && (i + 1 == dit.depth()), xx, yy);
-               
+
                // Make relative position inside of the edited inset relative to sl.inset()
                x += xx;
                y += yy;
-               
+
                // In case of an RTL inset, the edited inset will be positioned to the left
                // of xx:yy
                if (sl.text()) {
@@ -2531,21 +2814,8 @@ 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;
        }
@@ -2554,7 +2824,8 @@ Point BufferView::coordOffset(DocIterator const & dit) const
        CursorSlice const & sl = dit[0];
        TextMetrics const & tm = textMetrics(sl.text());
        ParagraphMetrics const & pm = tm.parMetrics(sl.pit());
-       LASSERT(!pm.rows().empty(), /**/);
+
+       LBUFERR(!pm.rows().empty());
        y -= pm.rows()[0].ascent();
 #if 1
        // FIXME: document this mess
@@ -2573,20 +2844,20 @@ Point BufferView::coordOffset(DocIterator const & dit) const
        for (size_t rit = 0; rit != rend; ++rit)
                y += pm.rows()[rit].height();
        y += pm.rows()[rend].ascent();
-       
+
        TextMetrics const & bottom_tm = textMetrics(dit.bottom().text());
-       
+
        // Make relative position from the nested inset now bufferview absolute.
        int xx = bottom_tm.cursorX(dit.bottom(), dit.boundary() && dit.depth() == 1);
        x += xx;
-       
-       // In the RTL case place the nested inset at the left of the cursor in 
+
+       // In the RTL case place the nested inset at the left of the cursor in
        // the outer paragraph
        bool boundary_1 = dit.boundary() && 1 == dit.depth();
        bool rtl = bottom_tm.isRTL(dit.bottom(), boundary_1);
        if (rtl)
                x -= lastw;
-       
+
        return Point(x, y);
 }
 
@@ -2600,7 +2871,7 @@ Point BufferView::getPos(DocIterator const & dit) const
        TextMetrics const & tm = textMetrics(bot.text());
 
        // offset from outer paragraph
-       Point p = coordOffset(dit); 
+       Point p = coordOffset(dit);
        p.y_ += tm.parMetrics(bot.pit()).position();
        return p;
 }
@@ -2618,7 +2889,7 @@ bool BufferView::paragraphVisible(DocIterator const & dit) const
 void BufferView::cursorPosAndHeight(Point & p, int & h) const
 {
        Cursor const & cur = cursor();
-       Font const font = cur.getFont();
+       Font const font = cur.real_current_font;
        frontend::FontMetrics const & fm = theFontMetrics(font);
        int const asc = fm.maxAscent();
        int const des = fm.maxDescent();
@@ -2638,6 +2909,145 @@ bool BufferView::cursorInView(Point const & p, int h) const
 }
 
 
+int BufferView::horizScrollOffset() const
+{
+       return d->horiz_scroll_offset_;
+}
+
+
+int BufferView::horizScrollOffset(Text const * text,
+                                  pit_type pit, pos_type pos) const
+{
+       // 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;
+}
+
+
+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();
+               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();
+
+       // Since we changed row, the scroll offset is not valid anymore
+       d->horiz_scroll_offset_ = 0;
+       d->current_row_slice_ = rowSlice;
+}
+
+
+void BufferView::checkCursorScrollOffset(PainterInfo & pi)
+{
+       CursorSlice rowSlice = d->cursor_.bottom();
+       TextMetrics const & tm = textMetrics(rowSlice.text());
+
+       // Stop if metrics have not been computed yet, since it means
+       // that there is nothing to do.
+       if (!tm.contains(rowSlice.pit()))
+               return;
+       ParagraphMetrics const & pm = tm.parMetrics(rowSlice.pit());
+       Row const & row = pm.getRow(rowSlice.pos(),
+                                   d->cursor_.boundary() && rowSlice == d->cursor_.top());
+       rowSlice.pos() = row.pos();
+
+       // Set the row on which the cursor lives.
+       setCurrentRowSlice(rowSlice);
+
+       // If insets referred to by cursor are not all in the cache, the positions
+       // need to be recomputed.
+       if (!d->cursor_.inCoordCache()) {
+               /** FIXME: the code below adds an extraneous computation of
+                * inset positions, and can therefore be bad for performance
+                * (think for example about a very large tabular inset.
+                * Redawing the row where it is means redrawing the whole
+                * screen).
+                *
+                * The bug that this fixes is the following: assume that there
+                * is a very large math inset. Upon entering the inset, when
+                * pressing `End', the row is not scrolled and the cursor is
+                * not visible. The extra row computation makes sure that the
+                * inset positions are correctly computed and set in the
+                * cache. This would not happen if we did not have two-stage
+                * drawing.
+                *
+                * A proper fix would be to always have proper inset positions
+                * at this point.
+                */
+               // Force the recomputation of inset positions
+               bool const drawing = pi.pain.isDrawingEnabled();
+               pi.pain.setDrawingEnabled(false);
+               // No need to care about vertical position.
+               RowPainter rp(pi, buffer().text(), row, -d->horiz_scroll_offset_, 0);
+               rp.paintText();
+               pi.pain.setDrawingEnabled(drawing);
+       }
+
+       // Current x position of the cursor in pixels
+       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()
+                          + 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;
+       }
+
+       //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 "
+                      << d->horiz_scroll_offset_ << " to " << offset);
+
+       if (d->update_strategy_ == NoScreenUpdate
+           && (offset != d->horiz_scroll_offset_
+               || !d->last_row_slice_.empty())) {
+               // FIXME: if one uses SingleParUpdate, then home/end
+               // will not work on long rows. Why?
+               d->update_strategy_ = FullScreenUpdate;
+       }
+
+       d->horiz_scroll_offset_ = offset;
+}
+
+
 void BufferView::draw(frontend::Painter & pain)
 {
        if (height_ == 0 || width_ == 0)
@@ -2649,22 +3059,28 @@ void BufferView::draw(frontend::Painter & pain)
        int const y = tm.first().second->position();
        PainterInfo pi(this, pain);
 
+       // Check whether the row where the cursor lives needs to be scrolled.
+       // Update the drawing strategy if needed.
+       checkCursorScrollOffset(pi);
+
        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.
+               LYXERR(Debug::PAINTING, "Strategy: NoScreenUpdate");
                pi.full_repaint = true;
                pi.pain.setDrawingEnabled(false);
-               tm.draw(pi, 0, y);
+               tm.draw(pi, 0, y);
                break;
 
        case SingleParUpdate:
                pi.full_repaint = false;
+               LYXERR(Debug::PAINTING, "Strategy: SingleParUpdate");
                // In general, only the current row of the outermost paragraph
                // will be redrawn. Particular cases where selection spans
                // multiple paragraph are correctly detected in TextMetrics.
-               tm.draw(pi, 0, y);
+               tm.draw(pi, 0, y);
                break;
 
        case DecorationUpdate:
@@ -2673,6 +3089,12 @@ void BufferView::draw(frontend::Painter & pain)
                // because of the single backing pixmap.
 
        case FullScreenUpdate:
+
+               LYXERR(Debug::PAINTING,
+                      ((d->update_strategy_ == FullScreenUpdate)
+                       ? "Strategy: FullScreenUpdate"
+                       : "Strategy: DecorationUpdate"));
+
                // The whole screen, including insets, will be refreshed.
                pi.full_repaint = true;
 
@@ -2686,9 +3108,9 @@ void BufferView::draw(frontend::Painter & pain)
                // and possibly grey out below
                pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
                int const y2 = lastpm.second->position() + lastpm.second->descent();
-               
+
                if (y2 < height_) {
-                       Color color = buffer().isInternal() 
+                       Color color = buffer().isInternal()
                                ? Color_background : Color_bottomarea;
                        pain.fillRectangle(0, y2, width_, height_ - y2, color);
                }
@@ -2824,6 +3246,12 @@ DocIterator const & BufferView::inlineCompletionPos() const
 }
 
 
+void BufferView::resetInlineCompletionPos()
+{
+       d->inlineCompletionPos_ = DocIterator();
+}
+
+
 bool samePar(DocIterator const & a, DocIterator const & b)
 {
        if (a.empty() && b.empty())
@@ -2836,7 +3264,7 @@ bool samePar(DocIterator const & a, DocIterator const & b)
 }
 
 
-void BufferView::setInlineCompletion(Cursor & cur, DocIterator const & pos, 
+void BufferView::setInlineCompletion(Cursor const & cur, DocIterator const & pos,
        docstring const & completion, size_t uniqueChars)
 {
        uniqueChars = min(completion.size(), uniqueChars);
@@ -2845,9 +3273,9 @@ void BufferView::setInlineCompletion(Cursor & cur, DocIterator const & pos,
        bool singlePar = true;
        d->inlineCompletion_ = completion;
        d->inlineCompletionUniqueChars_ = min(completion.size(), uniqueChars);
-       
+
        //lyxerr << "setInlineCompletion pos=" << pos << " completion=" << completion << " uniqueChars=" << uniqueChars << std::endl;
-       
+
        // at new position?
        DocIterator const & old = d->inlineCompletionPos_;
        if (old != pos) {
@@ -2860,14 +3288,20 @@ void BufferView::setInlineCompletion(Cursor & cur, DocIterator const & pos,
                }
                d->inlineCompletionPos_ = pos;
        }
-       
+
        // set update flags
        if (changed) {
-               if (singlePar && !(cur.result().update() & Update::Force))
-                       cur.screenUpdateFlags(cur.result().update() | Update::SinglePar);
+               if (singlePar && !(cur.result().screenUpdate() & Update::Force))
+                       cur.screenUpdateFlags(cur.result().screenUpdate() | Update::SinglePar);
                else
-                       cur.screenUpdateFlags(cur.result().update() | Update::Force);
+                       cur.screenUpdateFlags(cur.result().screenUpdate() | Update::Force);
        }
 }
 
+
+bool BufferView::clickableInset() const
+{
+       return d->clickable_inset_;
+}
+
 } // namespace lyx