]> git.lyx.org Git - lyx.git/blobdiff - src/BufferView.C
Fix loop when opening TOC widget in an empty document, basically by Richard Heck.
[lyx.git] / src / BufferView.C
index 841f3703b39631776473f13ac71a637519784468..ada9cd1171d08a805eb03c8a73aa7088ab7343fb 100644 (file)
@@ -145,7 +145,7 @@ Buffer * BufferView::buffer() const
 
 void BufferView::setBuffer(Buffer * b)
 {
-       lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
+       LYXERR(Debug::INFO) << BOOST_CURRENT_FUNCTION
                            << "[ b = " << b << "]" << endl;
 
        if (buffer_) {
@@ -154,9 +154,27 @@ void BufferView::setBuffer(Buffer * b)
                // to this buffer later on.
                buffer_->saveCursor(cursor_.selectionBegin(),
                                    cursor_.selectionEnd());
+               // update bookmark pit of the current buffer before switch
+               for (size_t i = 0; i < LyX::ref().session().bookmarks().size(); ++i) {
+                       BookmarksSection::Bookmark const & bm = LyX::ref().session().bookmarks().bookmark(i);
+                       if (buffer()->fileName() != bm.filename.absFilename())
+                               continue;
+                       // if top_id or bottom_pit, bottom_pos has been changed, update bookmark
+                       // see http://bugzilla.lyx.org/show_bug.cgi?id=3092
+                       pit_type new_pit;
+                       pos_type new_pos;
+                       int new_id;
+                       boost::tie(new_pit, new_pos, new_id) = moveToPosition(bm.bottom_pit, bm.bottom_pos, bm.top_id, bm.top_pos);
+                       if (bm.bottom_pit != new_pit || bm.bottom_pos != new_pos || bm.top_id != new_id )
+                               const_cast<BookmarksSection::Bookmark &>(bm).updatePos(new_pit, new_pos, new_id);
+               }
                // current buffer is going to be switched-off, save cursor pos
+               // Ideally, the whole cursor stack should be saved, but session
+               // currently can only handle bottom (whole document) level pit and pos.
+               // That is to say, if a cursor is in a nested inset, it will be
+               // restore to the left of the top level inset.
                LyX::ref().session().lastFilePos().save(FileName(buffer_->fileName()),
-                       boost::tie(cursor_.pit(), cursor_.pos()) );
+                       boost::tie(cursor_.bottom().pit(), cursor_.bottom().pos()) );
        }
 
        // If we're quitting lyx, don't bother updating stuff
@@ -168,7 +186,7 @@ void BufferView::setBuffer(Buffer * b)
        // If we are closing current buffer, switch to the first in
        // buffer list.
        if (!b) {
-               lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
+               LYXERR(Debug::INFO) << BOOST_CURRENT_FUNCTION
                                    << " No Buffer!" << endl;
                // We are closing the buffer, use the first buffer as current
                buffer_ = theBufferList().first();
@@ -183,11 +201,10 @@ void BufferView::setBuffer(Buffer * b)
        offset_ref_ = 0;
 
        if (buffer_) {
-               lyxerr[Debug::INFO] << BOOST_CURRENT_FUNCTION
+               LYXERR(Debug::INFO) << BOOST_CURRENT_FUNCTION
                                    << "Buffer addr: " << buffer_ << endl;
                cursor_.push(buffer_->inset());
                cursor_.resetAnchor();
-               updateLabels(*buffer_);
                buffer_->text().setCurrentFont(cursor_);
                if (buffer_->getCursor().size() > 0 &&
                    buffer_->getAnchor().size() > 0)
@@ -196,6 +213,8 @@ void BufferView::setBuffer(Buffer * b)
                        cursor_.resetAnchor();
                        cursor_.setCursor(buffer_->getCursor().asDocIterator(&(buffer_->inset())));
                        cursor_.setSelection();
+                       // do not set selection to the new buffer because we
+                       // only paste recent selection.
                }
        }
 
@@ -256,27 +275,18 @@ bool BufferView::loadLyXFile(FileName const & filename, bool tolastfiles)
        // Send the "errors" signal in case of parsing errors
        b->errors("Parse");
 
+       // Update the labels and section numbering.
+       updateLabels(*buffer_);
        // scroll to the position when the file was last closed
        if (lyxrc.use_lastfilepos) {
                pit_type pit;
                pos_type pos;
                boost::tie(pit, pos) = LyX::ref().session().lastFilePos().load(filename);
-               // I am not sure how to separate the following part to a function
-               // so I will leave this to Lars.
-               //
-               // check pit since the document may be externally changed.
-               if ( static_cast<size_t>(pit) < b->paragraphs().size() ) {
-                       ParIterator it = b->par_iterator_begin();
-                       ParIterator const end = b->par_iterator_end();
-                       for (; it != end; ++it)
-                               if (it.pit() == pit) {
-                                       // restored pos may be bigger than it->size
-                                       setCursor(makeDocIterator(it, min(pos, it->size())));
-                                       // No need to update the metrics if fitCursor returns false.
-                                       if (fitCursor())
-                                               updateMetrics(false);
-                                       break;
-                               }
+               // if successfully move to pit (returned par_id is not zero), update metrics and reset font
+               if (moveToPosition(pit, pos, 0, 0).get<1>()) {
+                       if (fitCursor())
+                               updateMetrics(false);
+                       buffer_->text().setCurrentFont(cursor_);
                }
        }
 
@@ -287,19 +297,12 @@ bool BufferView::loadLyXFile(FileName const & filename, bool tolastfiles)
 }
 
 
-void BufferView::reload()
-{
-       if (theBufferList().close(buffer_, false))
-               loadLyXFile(FileName(buffer_->fileName()));
-}
-
-
 void BufferView::resize()
 {
        if (!buffer_)
                return;
 
-       lyxerr[Debug::DEBUG] << BOOST_CURRENT_FUNCTION << endl;
+       LYXERR(Debug::DEBUG) << BOOST_CURRENT_FUNCTION << endl;
 
        updateMetrics(false);
        switchKeyMap();
@@ -340,22 +343,18 @@ bool BufferView::update(Update::flags flags)
        // causes screen update(), I reset last_inset_ to avoid such a problem.
        last_inset_ = 0;
        // This is close to a hot-path.
-       if (lyxerr.debugging(Debug::DEBUG)) {
-               lyxerr[Debug::DEBUG]
-                       << BOOST_CURRENT_FUNCTION
-                       << "[fitcursor = " << (flags & Update::FitCursor)
-                       << ", forceupdate = " << (flags & Update::Force)
-                       << ", singlepar = " << (flags & Update::SinglePar)
-                       << "]  buffer: " << buffer_ << endl;
-       }
+       LYXERR(Debug::DEBUG)
+               << BOOST_CURRENT_FUNCTION
+               << "[fitcursor = " << (flags & Update::FitCursor)
+               << ", forceupdate = " << (flags & Update::Force)
+               << ", singlepar = " << (flags & Update::SinglePar)
+               << "]  buffer: " << buffer_ << endl;
 
        // Check needed to survive LyX startup
        if (!buffer_)
                return false;
 
-       if (lyxerr.debugging(Debug::WORKAREA)) {
-               lyxerr[Debug::WORKAREA] << "BufferView::update" << std::endl;
-       }
+       LYXERR(Debug::WORKAREA) << "BufferView::update" << std::endl;
 
        // Update macro store
        buffer_->buildMacros();
@@ -367,15 +366,30 @@ bool BufferView::update(Update::flags flags)
        // Case when no explicit update is requested.
        if (!flags) {
                // no need to redraw anything.
+               metrics_info_.update_strategy = NoScreenUpdate;
                return false;
        }
 
-       if (flags == Update::FitCursor) {
+       if (flags == Update::Decoration) {
+               metrics_info_.update_strategy = DecorationUpdate;
+               return true;
+       }
+
+       if (flags == Update::FitCursor 
+               || flags == (Update::Decoration | Update::FitCursor)) {
                bool const fit_cursor = fitCursor();
-               if (fit_cursor)
-                       updateMetrics(false);
                // tell the frontend to update the screen if needed.
-               return fit_cursor;
+               if (fit_cursor) {
+                       updateMetrics(false);
+                       return true;
+               }
+               if (flags & Update::Decoration) {
+                       metrics_info_.update_strategy = DecorationUpdate;
+                       return true;
+               }
+               // no screen update is needed.
+               metrics_info_.update_strategy = NoScreenUpdate;
+               return false;
        }
 
        bool full_metrics = flags & Update::Force;
@@ -396,7 +410,7 @@ bool BufferView::update(Update::flags flags)
 void BufferView::updateScrollbar()
 {
        if (!buffer_) {
-               lyxerr[Debug::DEBUG] << BOOST_CURRENT_FUNCTION
+               LYXERR(Debug::DEBUG) << BOOST_CURRENT_FUNCTION
                                     << " no text in updateScrollbar" << endl;
                scrollbarParameters_.reset();
                return;
@@ -411,13 +425,11 @@ void BufferView::updateScrollbar()
                offset_ref_ = 0;
        }
 
-       if (lyxerr.debugging(Debug::GUI)) {
-               lyxerr[Debug::GUI]
-                       << BOOST_CURRENT_FUNCTION
-                       << " Updating scrollbar: height: " << t.paragraphs().size()
-                       << " curr par: " << cursor_.bottom().pit()
-                       << " default height " << defaultRowHeight() << endl;
-       }
+       LYXERR(Debug::GUI)
+               << BOOST_CURRENT_FUNCTION
+               << " Updating scrollbar: height: " << t.paragraphs().size()
+               << " curr par: " << cursor_.bottom().pit()
+               << " default height " << defaultRowHeight() << endl;
 
        // It would be better to fix the scrollbar to understand
        // values in [0..1] and divide everything by wh
@@ -466,7 +478,7 @@ ScrollbarParameters const & BufferView::scrollbarParameters() const
 
 void BufferView::scrollDocView(int value)
 {
-       lyxerr[Debug::GUI] << BOOST_CURRENT_FUNCTION
+       LYXERR(Debug::GUI) << BOOST_CURRENT_FUNCTION
                           << "[ value = " << value << "]" << endl;
 
        if (!buffer_)
@@ -490,6 +502,9 @@ void BufferView::scrollDocView(int value)
 
 void BufferView::setCursorFromScrollbar()
 {
+       if (!buffer_)
+               return;
+
        LyXText & t = buffer_->text();
 
        int const height = 2 * defaultRowHeight();
@@ -501,10 +516,16 @@ void BufferView::setCursorFromScrollbar()
 
        switch (st) {
        case bv_funcs::CUR_ABOVE:
+               // We reset the cursor because bv_funcs::status() does not
+               // work when the cursor is within mathed.
+               cur.reset(buffer_->inset());
                t.setCursorFromCoordinates(cur, 0, first);
                cur.clearSelection();
                break;
        case bv_funcs::CUR_BELOW:
+               // We reset the cursor because bv_funcs::status() does not
+               // work when the cursor is within mathed.
+               cur.reset(buffer_->inset());
                t.setCursorFromCoordinates(cur, 0, last);
                cur.clearSelection();
                break;
@@ -529,29 +550,70 @@ Change const BufferView::getCurrentChange() const
 }
 
 
-void BufferView::saveBookmark(bool persistent)
+void BufferView::saveBookmark(unsigned int idx)
 {
+       // tenatively save bookmark, id and pos will be used to
+       // acturately locate a bookmark in a 'live' lyx session.
+       // pit and pos will be updated with bottom level pit/pos 
+       // when lyx exits.
        LyX::ref().session().bookmarks().save(
                FileName(buffer_->fileName()),
+               cursor_.bottom().pit(),
+               cursor_.bottom().pos(),
                cursor_.paragraph().id(),
                cursor_.pos(),
-               persistent
+               idx
        );
-       if (persistent)
+       if (idx)
                // emit message signal.
                message(_("Save bookmark"));
 }
 
 
-void BufferView::moveToPosition(int par_id, pos_type par_pos)
+boost::tuple<pit_type, pos_type, int> BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
+       int top_id, pos_type top_pos)
 {
        cursor_.clearSelection();
 
-       ParIterator par = buffer_->getParFromID(par_id);
-       if (par == buffer_->par_iterator_end())
-               return;
-
-       setCursor(makeDocIterator(par, min(par->size(), par_pos)));
+       // if a valid par_id is given, try it first
+       // This is the case for a 'live' bookmark when unique paragraph ID
+       // is used to track bookmarks.
+       if (top_id > 0) {
+               ParIterator par = buffer_->getParFromID(top_id);
+               if (par != buffer_->par_iterator_end()) {
+                       DocIterator dit = makeDocIterator(par, min(par->size(), top_pos));
+                       // Some slices of the iterator may not be reachable (e.g. closed collapsable inset)
+                       // so the dociterator may need to be shortened. Otherwise, setCursor may
+                       // crash lyx when the cursor can not be set to these insets.
+                       size_t const n = dit.depth();
+                       for (size_t i = 0; i < n; ++i)
+                               if (dit[i].inset().editable() != InsetBase::HIGHLY_EDITABLE) {
+                                       dit.resize(i);
+                                       break;
+                               }
+                       setCursor(dit);
+                       // Note: return bottom (document) level pit.
+                       return boost::make_tuple(cursor_.bottom().pit(), cursor_.bottom().pos(), top_id);
+               }
+       }
+       // if top_id == 0, or searching through top_id failed
+       // This is the case for a 'restored' bookmark when only bottom 
+       // (document level) pit was saved. Because of this, bookmark
+       // restoration is inaccurate. If a bookmark was within an inset,
+       // it will be restored to the left of the outmost inset that contains
+       // the bookmark.
+       if (static_cast<size_t>(bottom_pit) < buffer_->paragraphs().size()) {
+               ParIterator it = buffer_->par_iterator_begin();
+               ParIterator const end = buffer_->par_iterator_end();
+               for (; it != end; ++it)
+                       if (it.pit() == bottom_pit) {
+                               // restored pos may be bigger than it->size
+                               setCursor(makeDocIterator(it, min(bottom_pos, it->size())));
+                               return boost::make_tuple(bottom_pit, bottom_pos, it->id());
+                       }
+       }
+       // both methods fail
+       return boost::make_tuple(pit_type(0), pos_type(0), 0);
 }
 
 
@@ -560,7 +622,7 @@ void BufferView::switchKeyMap()
        if (!lyxrc.rtl_support)
                return;
 
-       if (getLyXText()->real_current_font.isRightToLeft()) {
+       if (cursor_.innerText()->real_current_font.isRightToLeft()) {
                if (intl_->keymap == Intl::PRIMARY)
                        intl_->keyMapSec();
        } else {
@@ -602,8 +664,8 @@ FuncStatus BufferView::getStatus(FuncRequest const & cmd)
                flag.enabled(!buffer_->redostack().empty());
                break;
        case LFUN_FILE_INSERT:
-       case LFUN_FILE_INSERT_ASCII_PARA:
-       case LFUN_FILE_INSERT_ASCII:
+       case LFUN_FILE_INSERT_PLAINTEXT_PARA:
+       case LFUN_FILE_INSERT_PLAINTEXT:
        case LFUN_BOOKMARK_SAVE:
                // FIXME: Actually, these LFUNS should be moved to LyXText
                flag.enabled(cursor_.inTexted());
@@ -642,13 +704,10 @@ FuncStatus BufferView::getStatus(FuncRequest const & cmd)
                flag.setOnOff(buffer_->params().trackChanges);
                break;
 
-       case LFUN_CHANGES_OUTPUT: {
-               OutputParams runparams;
-               LaTeXFeatures features(*buffer_, buffer_->params(), runparams);
-               flag.enabled(buffer_ && features.isAvailable("dvipost"));
+       case LFUN_CHANGES_OUTPUT:
+               flag.enabled(buffer_ && LaTeXFeatures::isAvailable("dvipost"));
                flag.setOnOff(buffer_->params().outputChanges);
                break;
-       }
 
        case LFUN_CHANGES_MERGE:
        case LFUN_CHANGE_NEXT:
@@ -674,13 +733,13 @@ FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 }
 
 
-bool BufferView::dispatch(FuncRequest const & cmd)
+Update::flags BufferView::dispatch(FuncRequest const & cmd)
 {
        //lyxerr << BOOST_CURRENT_FUNCTION
        //       << [ cmd = " << cmd << "]" << endl;
 
        // Make sure that the cached BufferView is correct.
-       lyxerr[Debug::ACTION] << BOOST_CURRENT_FUNCTION
+       LYXERR(Debug::ACTION) << BOOST_CURRENT_FUNCTION
                << " action[" << cmd.action << ']'
                << " arg[" << to_utf8(cmd.argument()) << ']'
                << " x[" << cmd.x << ']'
@@ -688,30 +747,34 @@ bool BufferView::dispatch(FuncRequest const & cmd)
                << " button[" << cmd.button() << ']'
                << endl;
 
+       // FIXME: this should not be possible.
+       if (!buffer_)
+               return Update::None;
+
        LCursor & cur = cursor_;
+       // Default Update flags.
+       Update::flags updateFlags = Update::Force | Update::FitCursor;
 
        switch (cmd.action) {
 
        case LFUN_UNDO:
-               if (buffer_) {
-                       cur.message(_("Undo"));
-                       cur.clearSelection();
-                       if (!textUndo(*this))
-                               cur.message(_("No further undo information"));
-                       update();
-                       switchKeyMap();
+               cur.message(_("Undo"));
+               cur.clearSelection();
+               if (!textUndo(*this)) {
+                       cur.message(_("No further undo information"));
+                       updateFlags = Update::None;
                }
+               switchKeyMap();
                break;
 
        case LFUN_REDO:
-               if (buffer_) {
-                       cur.message(_("Redo"));
-                       cur.clearSelection();
-                       if (!textRedo(*this))
-                               cur.message(_("No further redo information"));
-                       update();
-                       switchKeyMap();
+               cur.message(_("Redo"));
+               cur.clearSelection();
+               if (!textRedo(*this)) {
+                       cur.message(_("No further redo information"));
+                       updateFlags = Update::None;
                }
+               switchKeyMap();
                break;
 
        case LFUN_FILE_INSERT:
@@ -719,14 +782,14 @@ bool BufferView::dispatch(FuncRequest const & cmd)
                menuInsertLyXFile(to_utf8(cmd.argument()));
                break;
 
-       case LFUN_FILE_INSERT_ASCII_PARA:
+       case LFUN_FILE_INSERT_PLAINTEXT_PARA:
                // FIXME UNICODE
-               insertAsciiFile(this, to_utf8(cmd.argument()), true);
+               insertPlaintextFile(this, to_utf8(cmd.argument()), true);
                break;
 
-       case LFUN_FILE_INSERT_ASCII:
+       case LFUN_FILE_INSERT_PLAINTEXT:
                // FIXME UNICODE
-               insertAsciiFile(this, to_utf8(cmd.argument()), false);
+               insertPlaintextFile(this, to_utf8(cmd.argument()), false);
                break;
 
        case LFUN_FONT_STATE:
@@ -746,7 +809,7 @@ bool BufferView::dispatch(FuncRequest const & cmd)
                        if (inset) {
                                label = inset->getParam("reference");
                                // persistent=false: use temp_bookmark
-                               saveBookmark(false);
+                               saveBookmark(0);
                        }
                }
 
@@ -761,11 +824,11 @@ bool BufferView::dispatch(FuncRequest const & cmd)
                for (Buffer * b = buffer_; i == 0 || b != buffer_; b = theBufferList().next(b)) {
                        ParIterator par = b->getParFromID(id);
                        if (par == b->par_iterator_end()) {
-                               lyxerr[Debug::INFO]
+                               LYXERR(Debug::INFO)
                                        << "No matching paragraph found! ["
                                        << id << "]." << endl;
                        } else {
-                               lyxerr[Debug::INFO]
+                               LYXERR(Debug::INFO)
                                        << "Paragraph " << par->id()
                                        << " found in buffer `"
                                        << b->fileName() << "'." << endl;
@@ -773,13 +836,13 @@ bool BufferView::dispatch(FuncRequest const & cmd)
                                if (b == buffer_) {
                                        // Set the cursor
                                        setCursor(makeDocIterator(par, 0));
-                                       update();
                                        switchKeyMap();
                                } else {
                                        // Switch to other buffer view and resend cmd
                                        theLyXFunc().dispatch(FuncRequest(
                                                LFUN_BUFFER_SWITCH, b->fileName()));
                                        theLyXFunc().dispatch(cmd);
+                                       updateFlags = Update::None;
                                }
                                break;
                        }
@@ -823,10 +886,9 @@ bool BufferView::dispatch(FuncRequest const & cmd)
                buffer_->params().trackChanges = !buffer_->params().trackChanges;
                break;
 
-       case LFUN_CHANGES_OUTPUT: {
+       case LFUN_CHANGES_OUTPUT:
                buffer_->params().outputChanges = !buffer_->params().outputChanges;
                break;
-       }
 
        case LFUN_CHANGE_NEXT:
                findNextChange(this);
@@ -837,26 +899,24 @@ bool BufferView::dispatch(FuncRequest const & cmd)
                        showDialog("changes");
                break;
 
-       case LFUN_ALL_CHANGES_ACCEPT: {
+       case LFUN_ALL_CHANGES_ACCEPT:
+               // select complete document
                cursor_.reset(buffer_->inset());
-#ifdef WITH_WARNINGS
-#warning FIXME changes
-#endif
-               while (findNextChange(this))
-                       getLyXText()->acceptChange(cursor_);
-               update();
+               cursor_.selHandle(true);
+               buffer_->text().cursorBottom(cursor_);
+               // accept everything in a single step to support atomic undo
+               buffer_->text().acceptOrRejectChanges(cursor_, LyXText::ACCEPT);
                break;
-       }
 
-       case LFUN_ALL_CHANGES_REJECT: {
+       case LFUN_ALL_CHANGES_REJECT:
+               // select complete document
                cursor_.reset(buffer_->inset());
-#ifdef WITH_WARNINGS
-#warning FIXME changes
-#endif
-               while (findNextChange(this))
-                       getLyXText()->rejectChange(cursor_);
+               cursor_.selHandle(true);
+               buffer_->text().cursorBottom(cursor_);
+               // 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(cursor_, LyXText::REJECT);
                break;
-       }
 
        case LFUN_WORD_FIND:
                find(this, cmd);
@@ -979,10 +1039,10 @@ bool BufferView::dispatch(FuncRequest const & cmd)
        }
 
        default:
-               return false;
+               updateFlags = Update::None;
        }
 
-       return true;
+       return updateFlags;
 }
 
 
@@ -1015,6 +1075,10 @@ void BufferView::clearSelection()
 {
        if (buffer_) {
                cursor_.clearSelection();
+               // Clear the selection buffer. Otherwise a subsequent
+               // middle-mouse-button paste would use the selection buffer,
+               // not the more current external selection.
+               cap::clearSelection();
                xsel_cache_.set = false;
                // The buffer did not really change, but this causes the
                // redraw we need because we cleared the selection above.
@@ -1025,14 +1089,11 @@ void BufferView::clearSelection()
 
 void BufferView::workAreaResize(int width, int height)
 {
-       // A resize is triggered whenever a window gets focus,
-       // because of the shared rows() of a buffer in multiple
-       // buffer views.
-       
        // Update from work area
        width_ = width;
        height_ = height;
 
+       // The complete text metrics will be redone.
        text_metrics_.clear();
 
        if (buffer_)
@@ -1040,6 +1101,54 @@ void BufferView::workAreaResize(int width, int height)
 }
 
 
+InsetBase const * BufferView::getCoveringInset(LyXText const & text, int x, int y)
+{
+       pit_type pit = text.getPitNearY(*this, y);
+       BOOST_ASSERT(pit != -1);
+       Paragraph const & par = text.getPar(pit);
+
+       LYXERR(Debug::DEBUG)
+               << BOOST_CURRENT_FUNCTION
+               << ": x: " << x
+               << " y: " << y
+               << "  pit: " << pit
+               << endl;
+       InsetList::const_iterator iit = par.insetlist.begin();
+       InsetList::const_iterator iend = par.insetlist.end();
+       for (; iit != iend; ++iit) {
+               InsetBase * const inset = iit->inset;
+               if (inset->covers(*this, x, y)) {
+                       if (!inset->descendable())
+                               // No need to go further down if the inset is not 
+                               // descendable.
+                               return inset;
+
+                       size_t cell_number = inset->nargs();
+                       // Check all the inner cell.
+                       for (size_t i = 0; i != cell_number; ++i) {
+                               LyXText const * inner_text = inset->getText(i);
+                               if (inner_text) {
+                                       // Try deeper.
+                                       InsetBase const * inset_deeper = 
+                                               getCoveringInset(*inner_text, x, y);
+                                       if (inset_deeper)
+                                               return inset_deeper;
+                               }
+                       }
+
+                       LYXERR(Debug::DEBUG)
+                               << BOOST_CURRENT_FUNCTION
+                               << ": Hit inset: " << inset << endl;
+                       return inset;
+               }
+       }
+       LYXERR(Debug::DEBUG)
+               << BOOST_CURRENT_FUNCTION
+               << ": No inset hit. " << endl;
+       return 0;
+}
+
+
 bool BufferView::workAreaDispatch(FuncRequest const & cmd0)
 {
        //lyxerr << BOOST_CURRENT_FUNCTION << "[ cmd0 " << cmd0 << "]" << endl;
@@ -1059,34 +1168,35 @@ bool BufferView::workAreaDispatch(FuncRequest const & cmd0)
        // Either the inset under the cursor or the
        // surrounding LyXText will handle this event.
 
-       // Build temporary cursor.
+       // make sure we stay within the screen...
        cmd.y = min(max(cmd.y, -1), height_);
-       InsetBase * inset = buffer_->text().editXY(cur, cmd.x, cmd.y);
-
-       //lyxerr << BOOST_CURRENT_FUNCTION
-       //       << " * hit inset at tip: " << inset << endl;
-       //lyxerr << BOOST_CURRENT_FUNCTION
-       //       << " * created temp cursor:" << cur << endl;
-
-       // NOTE: editXY returns the top level inset of nested insets. If you happen
-       // to move from a text (inset=0) to a text inside an inset (e.g. an opened
-       // footnote inset, again inset=0), that inset will not be redrawn.
+       
        if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
-               bool need_redraw = false;
                
-               if (inset != last_inset_) {
-                       if (last_inset_)
-                               need_redraw |= last_inset_->setMouseHover(false);
-                       if (inset)
-                               need_redraw |= inset->setMouseHover(true);
-                       last_inset_ = inset;
-               }
+               // Get inset under mouse, if there is one.
+               InsetBase const * covering_inset = 
+                       getCoveringInset(buffer_->text(), cmd.x, cmd.y);
+               if (covering_inset == last_inset_)
+                       // Same inset, no need to do anything...
+                       return false;
+
+               bool need_redraw = false;
+               // const_cast because of setMouseHover().
+               InsetBase * inset = const_cast<InsetBase *>(covering_inset);
+               if (last_inset_)
+                       // Remove the hint on the last hovered inset (if any).
+                       need_redraw |= last_inset_->setMouseHover(false);
+               if (inset)
+                       // Highlighted the newly hovered inset (if any).
+                       need_redraw |= inset->setMouseHover(true);
+               last_inset_ = inset;
 
                // if last metrics update was in singlepar mode, WorkArea::redraw() will
                // not expose the button for redraw. We adjust here the metrics dimension
                // to enable a full redraw.
                // FIXME: It is possible to redraw only the area around the button!
-               if (need_redraw && metrics_info_.singlepar) {
+               if (need_redraw 
+                       && metrics_info_.update_strategy == SingleParUpdate) {
                        // FIXME: It should be possible to redraw only the area around 
                        // the button by doing this:
                        //
@@ -1113,6 +1223,9 @@ bool BufferView::workAreaDispatch(FuncRequest const & cmd0)
                // This should be changed if it is further utilized.
                return need_redraw;
        }
+       
+       // Build temporary cursor.
+       InsetBase * inset = buffer_->text().editXY(cur, cmd.x, cmd.y);
 
        // Put anchor at the same position.
        cur.resetAnchor();
@@ -1155,8 +1268,6 @@ void BufferView::scroll(int /*lines*/)
 //
 //     scrollDocView(new_top_y);
 //
-//     // Update the scrollbar.
-//     workArea_->setScrollbarParams(t->height(), top_y(), defaultRowHeight());}
 }
 
 
@@ -1188,22 +1299,6 @@ void BufferView::gotoLabel(docstring const & label)
 }
 
 
-LyXText * BufferView::getLyXText()
-{
-       LyXText * text = cursor_.innerText();
-       BOOST_ASSERT(text);
-       return text;
-}
-
-
-LyXText const * BufferView::getLyXText() const
-{
-       LyXText const * text = cursor_.innerText();
-       BOOST_ASSERT(text);
-       return text;
-}
-
-
 TextMetrics const & BufferView::textMetrics(LyXText const * t) const
 {
        return const_cast<BufferView *>(this)->textMetrics(t);
@@ -1261,6 +1356,8 @@ bool BufferView::checkDepm(LCursor & cur, LCursor & old)
        if (!changed)
                return false;
 
+       updateLabels(*buffer_);
+
        updateMetrics(false);
        buffer_->changed();
        return true;
@@ -1273,18 +1370,37 @@ bool BufferView::mouseSetCursor(LCursor & cur)
 
        // Has the cursor just left the inset?
        bool badcursor = false;
-       if (&cursor_.inset() != &cur.inset())
+       bool leftinset = (&cursor_.inset() != &cur.inset());
+       if (leftinset)
                badcursor = cursor_.inset().notifyCursorLeaves(cursor_);
 
        // do the dEPM magic if needed
-       // FIXME: move this to InsetText::notifyCursorLeaves?
-       bool update = false;
+       // 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 (!badcursor && cursor_.inTexted())
-               checkDepm(cur, cursor_);
+               update |= checkDepm(cur, cursor_);
+
+       // if the cursor was in an empty script inset and the new
+       // position is in the nucleus of the inset, notifyCursorLeaves
+       // will kill the script inset itself. So we check all the
+       // elements of the cursor to make sure that they are correct.
+       // For an example, see bug 2933: 
+       // http://bugzilla.lyx.org/show_bug.cgi?id=2933
+       // The code below could maybe be moved to a DocIterator method.
+       //lyxerr << "cur before " << cur <<std::endl;
+       DocIterator dit(cur.inset());
+       dit.push_back(cur.bottom());
+       size_t i = 1;
+       while (i < cur.depth() && dit.nextInset() == &cur[i].inset()) {
+               dit.push_back(cur[i]);
+               ++i;
+       }
+       //lyxerr << "5 cur after" << dit <<std::endl;
 
-       cursor_ = cur;
+       cursor_.setCursor(dit);
        cursor_.clearSelection();
-       cursor_.setTargetX();
        finishUndo();
        return update;
 }
@@ -1303,6 +1419,7 @@ void BufferView::putSelectionAt(DocIterator const & cur,
                        cursor_.setSelection(cursor_, -length);
                } else
                        cursor_.setSelection(cursor_, length);
+               cap::saveSelection(cursor_);
        }
 }
 
@@ -1428,7 +1545,7 @@ void BufferView::updateMetrics(bool singlepar)
                pit2 = cursor_.bottom().pit();
        }
 
-       lyxerr[Debug::DEBUG]
+       LYXERR(Debug::DEBUG)
                << BOOST_CURRENT_FUNCTION
                << " y1: " << y1
                << " y2: " << y2
@@ -1439,10 +1556,11 @@ void BufferView::updateMetrics(bool singlepar)
                << "size: " << size
                << endl;
 
-       metrics_info_ = ViewMetricsInfo(pit1, pit2, y1, y2, singlepar, size);
+       metrics_info_ = ViewMetricsInfo(pit1, pit2, y1, y2, 
+               singlepar? SingleParUpdate: FullScreenUpdate, size);
 
        if (lyxerr.debugging(Debug::WORKAREA)) {
-               lyxerr[Debug::WORKAREA] << "BufferView::updateMetrics" << endl;
+               LYXERR(Debug::WORKAREA) << "BufferView::updateMetrics" << endl;
                coord_cache_.dump();
        }
 }
@@ -1469,7 +1587,7 @@ void BufferView::menuInsertLyXFile(string const & filenm)
                FileDialog fileDlg(_("Select LyX document to insert"),
                        LFUN_FILE_INSERT,
                        make_pair(_("Documents|#o#O"), from_utf8(lyxrc.document_path)),
-                       make_pair(_("Examples|#E#e"), from_utf8(addPath(package().system_support(), "examples"))));
+                       make_pair(_("Examples|#E#e"), from_utf8(addPath(package().system_support().absFilename(), "examples"))));
 
                FileDialog::Result result =
                        fileDlg.open(from_utf8(initpath),