]> git.lyx.org Git - lyx.git/blobdiff - src/BufferView.cpp
#5502 add binding for full screen toggle on mac
[lyx.git] / src / BufferView.cpp
index 33d9199f2e573d8075be72ae4dfd4b28800be061..8a947c169fb12e30e80f6aff2bd8065a0406cd69 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"
@@ -62,6 +64,8 @@
 #include "insets/InsetRef.h"
 #include "insets/InsetText.h"
 
+#include "mathed/MathData.h"
+
 #include "frontends/alert.h"
 #include "frontends/Application.h"
 #include "frontends/Delegates.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"
@@ -107,6 +110,7 @@ T * getInsetByCode(Cursor const & cur, InsetCode code)
        return 0;
 }
 
+
 /// Note that comparing contents can only be used for InsetCommand
 bool findNextInset(DocIterator & dit, vector<InsetCode> const & codes,
        docstring const & contents)
@@ -116,12 +120,12 @@ bool findNextInset(DocIterator & dit, vector<InsetCode> const & codes,
        while (tmpdit) {
                Inset const * inset = tmpdit.nextInset();
                if (inset) {
-                       bool const valid_code = std::find(codes.begin(), codes.end(), 
+                       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;
@@ -223,12 +227,14 @@ 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), clickable_inset_(false), 
+               last_inset_(0), clickable_inset_(false),
                mouse_position_cache_(),
-               bookmark_edit_position_(-1), gui_(0)
+               bookmark_edit_position_(-1), gui_(0),
+               horiz_scroll_offset_(0)
        {}
 
        ///
@@ -269,7 +275,7 @@ 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_;
 
@@ -293,6 +299,16 @@ 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_;
 };
 
 
@@ -308,8 +324,7 @@ BufferView::BufferView(Buffer & buf)
        d->cursor_.resetAnchor();
        d->cursor_.setCurrentFont();
 
-       if (graphics::Previews::status() != LyXRC::PREVIEW_OFF)
-               thePreviews().generateBufferPreviews(buffer_);
+       buffer_.updatePreviews();
 }
 
 
@@ -324,9 +339,9 @@ 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;
 }
@@ -455,8 +470,10 @@ 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 scrolling.
                d->update_strategy_ = NoScreenUpdate;
+               buffer_.changed(false);
                return;
        }
 
@@ -497,7 +514,7 @@ 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()
@@ -564,7 +581,7 @@ 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())
@@ -657,7 +674,7 @@ 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
@@ -670,7 +687,10 @@ 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();
 }
@@ -682,6 +702,10 @@ Change const BufferView::getCurrentChange() const
                return Change(Change::UNCHANGED);
 
        DocIterator dit = d->cursor_.selectionBegin();
+       // The selected content might have been changed (see #7685)
+       while (dit.inMathed())
+               // Find enclosing text cursor
+               dit.pop_back();
        return dit.paragraph().lookupChange(dit.pos());
 }
 
@@ -770,7 +794,7 @@ 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;
@@ -795,14 +819,12 @@ 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);
@@ -874,7 +896,7 @@ 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_;
@@ -885,20 +907,28 @@ 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.
@@ -933,10 +963,18 @@ 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(
@@ -948,6 +986,7 @@ void BufferView::updateDocumentClass(DocumentClass const * const olddc)
        buffer_.errors("Class Switch");
 }
 
+
 /** Return the change status at cursor position, taking in account the
  * status at each level of the document iterator (a table in a deleted
  * footnote is deleted).
@@ -1026,9 +1065,17 @@ bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
                // 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());
@@ -1043,7 +1090,6 @@ 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:
@@ -1053,28 +1099,36 @@ 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: {
+       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_LABEL_GOTO:
                flag.setEnabled(!cmd.argument().empty()
                    || getInsetByCode<InsetRef>(cur, REF_CODE));
                break;
-       }
 
        case LFUN_CHANGES_TRACK:
                flag.setEnabled(true);
-               flag.setOnOff(buffer_.params().trackChanges);
+               flag.setOnOff(buffer_.params().track_changes);
                break;
 
        case LFUN_CHANGES_OUTPUT:
                flag.setEnabled(true);
-               flag.setOnOff(buffer_.params().outputChanges);
+               flag.setOnOff(buffer_.params().output_changes);
                break;
 
        case LFUN_CHANGES_MERGE:
@@ -1120,13 +1174,17 @@ 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: {
@@ -1175,20 +1233,13 @@ 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_;
 
        // Don't dispatch function that does not apply to internal buffers.
-       if (buffer_.isInternal() 
+       if (buffer_.isInternal()
            && lyxaction.funcHasFlag(cmd.action(), LyXAction::NoInternal))
                return;
 
@@ -1200,8 +1251,8 @@ 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);
@@ -1211,8 +1262,8 @@ 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.
@@ -1220,14 +1271,14 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                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);
+               makeDocumentClass();
                dr.screenUpdate(Update::Force);
                dr.forceBufferUpdate();
                break;
@@ -1235,26 +1286,27 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
 
        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);
+               makeDocumentClass();
                dr.screenUpdate(Update::Force);
                dr.forceBufferUpdate();
                break;
        }
 
        case LFUN_TEXTCLASS_APPLY: {
-               // since this shortcircuits, the second call is made only if 
+               // since this shortcircuits, the second call is made only if
                // the first fails
-               bool const success = 
+               bool const success =
                        LayoutFileList::get().load(argument, buffer_.temppath()) ||
                        LayoutFileList::get().load(argument, buffer_.filePath());
                if (!success) {
@@ -1272,24 +1324,24 @@ 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);
+               makeDocumentClass();
                dr.screenUpdate(Update::Force);
                dr.forceBufferUpdate();
                break;
        }
 
        case LFUN_TEXTCLASS_LOAD: {
-               // since this shortcircuits, the second call is made only if 
+               // since this shortcircuits, the second call is made only if
                // the first fails
-               bool const success = 
+               bool const success =
                        LayoutFileList::get().load(argument, buffer_.temppath()) ||
                        LayoutFileList::get().load(argument, buffer_.filePath());
-               if (!success) {                 
+               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);
@@ -1298,12 +1350,10 @@ 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);
+               makeDocumentClass();
                dr.screenUpdate(Update::Force);
                dr.forceBufferUpdate();
                break;
@@ -1357,7 +1407,7 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                }
                break;
        }
-       
+
        case LFUN_PARAGRAPH_GOTO: {
                int const id = convert<int>(cmd.getArg(0));
                int const pos = convert<int>(cmd.getArg(1));
@@ -1365,20 +1415,21 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                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);
+                               cur.pos() = pos;
+                               mouseSetCursor(cur);
                                dr.screenUpdate(Update::Force | Update::FitCursor);
                        } else {
                                // Switch to other buffer view and resend cmd
@@ -1404,12 +1455,12 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
        }
 
        case LFUN_CHANGES_TRACK:
-               buffer_.params().trackChanges = !buffer_.params().trackChanges;
+               buffer_.params().track_changes = !buffer_.params().track_changes;
                break;
 
        case LFUN_CHANGES_OUTPUT:
-               buffer_.params().outputChanges = !buffer_.params().outputChanges;
-               if (buffer_.params().outputChanges) {
+               buffer_.params().output_changes = !buffer_.params().output_changes;
+               if (buffer_.params().output_changes) {
                        bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
                        bool xcolorulem = LaTeXFeatures::isAvailable("ulem") &&
                                          LaTeXFeatures::isAvailable("xcolor");
@@ -1435,7 +1486,7 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                // FIXME: Move this LFUN to Buffer so that we don't have to do this:
                dr.screenUpdate(Update::Force | Update::FitCursor);
                break;
-       
+
        case LFUN_CHANGE_PREVIOUS:
                findPreviousChange(this);
                // FIXME: Move this LFUN to Buffer so that we don't have to do this:
@@ -1457,6 +1508,7 @@ 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.screenUpdate(Update::Force | Update::FitCursor);
                dr.forceBufferUpdate();
@@ -1470,6 +1522,7 @@ 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.screenUpdate(Update::Force | Update::FitCursor);
                dr.forceBufferUpdate();
@@ -1477,6 +1530,8 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
 
        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;
 
@@ -1494,8 +1549,14 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                docstring const data =
                        find2string(searched_string, true, false, fw);
                bool found = lyxfind(this, FuncRequest(LFUN_WORD_FIND, data));
-               if (found)
+               if (found) {
                        dr.screenUpdate(Update::Force | Update::FitCursor);
+                       cur.dispatched();
+                       dispatched = true;
+               } else {
+                       cur.undispatched();
+                       dispatched = false;
+               }
                break;
        }
 
@@ -1507,10 +1568,14 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                        lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, "findreplace"));
                        break;
                }
-               if (lyxfind(this, req))
+               if (lyxfind(this, req)) {
                        dr.screenUpdate(Update::Force | Update::FitCursor);
-               else
-                       message(_("String not found!"));
+                       cur.dispatched();
+                       dispatched = true;
+               } else {
+                       cur.undispatched();
+                       dispatched = false;
+               }
                d->search_request_cache_ = req;
                break;
        }
@@ -1532,6 +1597,11 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                if (lyxreplace(this, cmd, has_deleted)) {
                        dr.forceBufferUpdate();
                        dr.screenUpdate(Update::Force | Update::FitCursor);
+                       cur.dispatched();
+                       dispatched = true;
+               } else {
+                       cur.undispatched();
+                       dispatched = false;
                }
                break;
        }
@@ -1540,8 +1610,14 @@ 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();
+                       dispatched = true;
+               } else {
+                       cur.undispatched();
+                       dispatched = false;
+               }
                break;
        }
 
@@ -1571,7 +1647,7 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
        case LFUN_SCREEN_SHOW_CURSOR:
                showCursor();
                break;
-       
+
        case LFUN_SCREEN_RECENTER:
                recenter();
                break;
@@ -1599,7 +1675,7 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                        if (inset->delDatabase(cmd.argument())) {
                                buffer_.invalidateBibfileCache();
                                dr.forceBufferUpdate();
-                       }                               
+                       }
                }
                break;
        }
@@ -1613,9 +1689,10 @@ 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:");
@@ -1670,28 +1747,53 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                        p = Point(width_, height_);
                Cursor old = cur;
                bool const in_texted = cur.inTexted();
-               cur.reset();
+               cur.setCursor(doc_iterator_begin(cur.buffer()));
+               if (cur != old)
+                       notifyCursorLeavesOrEnters(old, cur);
+               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) {
+
+               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));
@@ -1709,6 +1811,7 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
        }
 
        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));
@@ -1726,6 +1829,41 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
        }
 
 
+       case LFUN_INSET_SELECT_ALL:
+               if (cur.depth() > 1
+                   && cur.selBegin().at_begin()
+                   && cur.selEnd().at_end()) {
+                       // All the contents of the inset if selected.
+                       // Select the inset from outside.
+                       cur.pop();
+                       cur.resetAnchor();
+                       cur.setSelection(true);
+                       cur.posForward();
+               } else if (cur.selBegin().idx() != cur.selEnd().idx()
+                          || (cur.depth() > 1
+                                  && cur.selBegin().at_cell_begin()
+                              && cur.selEnd().at_cell_end())) {
+                       // At least one complete cell is selected.
+                       // Select all cells
+                       cur.idx() = 0;
+                       cur.pos() = 0;
+                       cur.resetAnchor();
+                       cur.setSelection(true);
+                       cur.idx() = cur.lastidx();
+                       cur.pos() = cur.lastpos();
+               } else {
+                       // select current cell
+                       cur.pit() = 0;
+                       cur.pos() = 0;
+                       cur.resetAnchor();
+                       cur.setSelection(true);
+                       cur.pit() = cur.lastpit();
+                       cur.pos() = cur.lastpos();
+               }
+               dr.screenUpdate(Update::Force);
+               break;
+
+
        // This would be in Buffer class if only Cursor did not
        // require a bufferview
        case LFUN_INSET_FORALL: {
@@ -1734,7 +1872,7 @@ 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;
@@ -1743,10 +1881,10 @@ 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();
@@ -1759,7 +1897,9 @@ 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;
@@ -1822,7 +1962,7 @@ 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;
        }
@@ -1842,6 +1982,23 @@ 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())
@@ -1873,14 +2030,45 @@ void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
                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;
 }
 
 
@@ -1984,22 +2172,20 @@ 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.
@@ -2013,7 +2199,7 @@ void BufferView::clearLastInset(Inset * inset) const
 {
        if (d->last_inset_ != inset) {
                LYXERR0("Wrong last_inset!");
-               LASSERT(false, /**/);
+               LATTEST(false);
        }
        d->last_inset_ = 0;
 }
@@ -2070,46 +2256,26 @@ void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
 
        // 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 (cur.needBufferUpdate()) {
+               cur.clearBufferUpdate();
+               buffer().updateBuffer();
+       }
+
        // If the command has been dispatched,
        if (cur.result().dispatched() || cur.result().screenUpdate())
                processUpdateFlags(cur.result().screenUpdate());
 }
 
 
-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);
-       }
-       buffer_.changed(true);
-       updateHoveredInset();
-}
-
-
 int BufferView::minVisiblePart()
 {
        return 2 * defaultRowHeight();
@@ -2176,16 +2342,49 @@ int BufferView::scrollUp(int offset)
 
 void BufferView::setCursorFromRow(int row)
 {
-       int tmpid = -1;
-       int tmppos = -1;
+       int tmpid;
+       int tmppos;
+       pit_type newpit = 0;
+       pos_type newpos = 0;
 
        buffer_.texrow().getIdFromRow(row, tmpid, tmppos);
 
+       bool posvalid = (tmpid != -1);
+       if (posvalid) {
+               // we need to make sure that the row and position
+               // we got back are valid, because the buffer may well
+               // have changed since we last generated the LaTeX.
+               DocIterator dit = buffer_.getParFromID(tmpid);
+               if (dit == doc_iterator_end(&buffer_))
+                       posvalid = false;
+               else if (dit.depth() > 1) {
+                       // We are in an inset.
+                       pos_type lastpos = dit.lastpos();
+                       dit.pos() = tmppos > lastpos ? lastpos : tmppos;
+                       setCursor(dit);
+                       recenter();
+                       return;
+               } else {
+                       newpit = dit.pit();
+                       // now have to check pos.
+                       newpos = tmppos;
+                       Paragraph const & par = buffer_.text().getPar(newpit);
+                       if (newpos > par.size()) {
+                               LYXERR0("Requested position no longer valid.");
+                               newpos = par.size() - 1;
+                       }
+               }
+       }
+       if (!posvalid) {
+               frontend::Alert::error(_("Inverse Search Failed"),
+                       _("Invalid position requested by inverse search.\n"
+                   "You need to update the viewed document."));
+               return;
+       }
        d->cursor_.reset();
-       if (tmpid == -1)
-               buffer_.text().setCursor(d->cursor_, 0, 0);
-       else
-               buffer_.text().setCursor(d->cursor_, buffer_.getParFromID(tmpid).pit(), tmppos);
+       buffer_.text().setCursor(d->cursor_, newpit, newpos);
+       d->cursor_.setSelection(false);
+       d->cursor_.resetAnchor();
        recenter();
 }
 
@@ -2239,6 +2438,7 @@ 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(
@@ -2270,6 +2470,11 @@ void BufferView::setCursor(DocIterator const & dit)
 
        d->cursor_.setCursor(dit);
        d->cursor_.setSelection(false);
+       // 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();
 }
 
 
@@ -2291,7 +2496,10 @@ 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;
 }
@@ -2299,7 +2507,7 @@ bool BufferView::checkDepm(Cursor & cur, Cursor & old)
 
 bool BufferView::mouseSetCursor(Cursor & cur, bool select)
 {
-       LASSERT(&cur.bv() == this, /**/);
+       LASSERT(&cur.bv() == this, return false);
 
        if (!select)
                // this event will clear selection so we save selection for
@@ -2307,14 +2515,17 @@ 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();
+       bool const do_selection =
+                       select && &d->cursor_.normalAnchor().inset() == &cur.inset();
 
        // do the dEPM magic if needed
        // FIXME: (1) move this to InsetText::notifyCursorLeaves?
@@ -2358,6 +2569,43 @@ void BufferView::putSelectionAt(DocIterator const & cur,
 }
 
 
+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_.setSelection(false);
+       d->cursor_.resetAnchor();
+       d->cursor_.pit() = end_pit;
+       d->cursor_.pos() = end_pos;
+       d->cursor_.setSelection();
+       return true;
+}
+
+
 Cursor & BufferView::cursor()
 {
        return d->cursor_;
@@ -2392,7 +2640,7 @@ 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.
@@ -2429,7 +2677,7 @@ 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;
@@ -2437,19 +2685,19 @@ 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: "
@@ -2501,7 +2749,7 @@ 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
@@ -2512,8 +2760,8 @@ void BufferView::insertLyXFile(FileName const & fname)
        message(bformat(_("Inserting document %1$s..."), disp_fn));
 
        docstring res;
-       Buffer buf("", false);
-       if (buf.loadLyXFile(filename) == Buffer::ReadSuccess) {
+       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");
@@ -2528,7 +2776,6 @@ void BufferView::insertLyXFile(FileName const & fname)
        buffer_.changed(true);
        // emit message signal.
        message(bformat(res, disp_fn));
-       buffer_.errors("Parse");
 }
 
 
@@ -2544,14 +2791,14 @@ Point BufferView::coordOffset(DocIterator const & dit) const
                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()) {
@@ -2576,7 +2823,7 @@ Point BufferView::coordOffset(DocIterator const & dit) const
                        Dimension const dim = sl.inset().dimension(*this);
                        lastw = dim.wid;
                }
-               
+
                //lyxerr << "Cursor::getPos, i: "
                // << i << " x: " << xx << " y: " << y << endl;
        }
@@ -2585,7 +2832,8 @@ 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
@@ -2604,20 +2852,20 @@ 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);
 }
 
@@ -2631,7 +2879,7 @@ 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;
 }
@@ -2669,6 +2917,119 @@ bool BufferView::cursorInView(Point const & p, int h) const
 }
 
 
+int BufferView::horizScrollOffset() const
+{
+       return d->horiz_scroll_offset_;
+}
+
+
+CursorSlice const & BufferView::currentRowSlice() const
+{
+       return d->current_row_slice_;
+}
+
+
+CursorSlice const & BufferView::lastRowSlice() const
+{
+       return d->last_row_slice_;
+}
+
+
+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);
+
+       /** 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. I
+        * am not sure why the extra row computation fixes the problem,
+        * actually.
+        *
+        * A proper fix should be found and this code should be removed.
+        */
+       // 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(), d->cursor_.bottom().pit(), row,
+                     -d->horiz_scroll_offset_, 0);
+       rp.paintText();
+       pi.pain.setDrawingEnabled(drawing);
+       /** END of bad code */
+
+       // Current x position of the cursor in pixels
+       int const cur_x = getPos(d->cursor_).x_;
+
+       // Horizontal scroll offset of the cursor row in pixels
+       int offset = d->horiz_scroll_offset_;
+       int const MARGIN = Length(2, Length::EM).inPixels(pi.base);
+       if (cur_x < offset + MARGIN) {
+               // scroll right
+               offset = cur_x - MARGIN;
+       } else if (cur_x > offset + workWidth() - MARGIN) {
+               // scroll left
+               offset = cur_x - workWidth() + MARGIN;
+       }
+
+       if (offset < row.left_margin || row.width() <= workWidth())
+               offset = 0;
+
+       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)
@@ -2680,11 +3041,16 @@ 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);
@@ -2692,6 +3058,7 @@ void BufferView::draw(frontend::Painter & pain)
 
        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.
@@ -2704,6 +3071,12 @@ 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;
 
@@ -2717,9 +3090,9 @@ 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);
                }
@@ -2855,6 +3228,12 @@ DocIterator const & BufferView::inlineCompletionPos() const
 }
 
 
+void BufferView::resetInlineCompletionPos()
+{
+       d->inlineCompletionPos_ = DocIterator();
+}
+
+
 bool samePar(DocIterator const & a, DocIterator const & b)
 {
        if (a.empty() && b.empty())
@@ -2867,7 +3246,7 @@ 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);
@@ -2876,9 +3255,9 @@ 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) {
@@ -2891,7 +3270,7 @@ void BufferView::setInlineCompletion(Cursor & cur, DocIterator const & pos,
                }
                d->inlineCompletionPos_ = pos;
        }
-       
+
        // set update flags
        if (changed) {
                if (singlePar && !(cur.result().screenUpdate() & Update::Force))
@@ -2903,8 +3282,8 @@ void BufferView::setInlineCompletion(Cursor & cur, DocIterator const & pos,
 
 
 bool BufferView::clickableInset() const
-{ 
-       return d->clickable_inset_; 
+{
+       return d->clickable_inset_;
 }
 
 } // namespace lyx