]> git.lyx.org Git - lyx.git/blobdiff - src/BufferView.cpp
Merge branch 'master' of git.lyx.org:lyx
[lyx.git] / src / BufferView.cpp
index c59b7ddc086101d048d20a9d0287ee576c77f75f..6922770f2966c558fe8d28f867c094f43eeeed0d 100644 (file)
@@ -4,10 +4,10 @@
  * Licence details can be found in the file COPYING.
  *
  * \author Alfredo Braunstein
- * \author Lars Gullik Bjønnes
+ * \author Lars Gullik Bjønnes
  * \author John Levon
- * \author André Pönitz
- * \author Jürgen Vigna
+ * \author André Pönitz
+ * \author Jürgen Vigna
  *
  * Full author contact details are available in file CREDITS.
  */
 #include "InsetIterator.h"
 #include "Language.h"
 #include "LaTeXFeatures.h"
+#include "LayoutFile.h"
+#include "Length.h"
+#include "Lexer.h"
 #include "LyX.h"
+#include "LyXAction.h"
 #include "lyxfind.h"
-#include "LyXFunc.h"
 #include "Layout.h"
 #include "LyXRC.h"
 #include "MetricsInfo.h"
 #include "Paragraph.h"
-#include "paragraph_funcs.h"
 #include "ParagraphParameters.h"
 #include "ParIterator.h"
+#include "RowPainter.h"
 #include "Session.h"
 #include "Text.h"
 #include "TextClass.h"
 #include "TextMetrics.h"
 #include "TexRow.h"
 #include "TocBackend.h"
-#include "VSpace.h"
 #include "WordLangTuple.h"
 
 #include "insets/InsetBibtex.h"
+#include "insets/InsetCitation.h"
 #include "insets/InsetCommand.h" // ChangeRefs
 #include "insets/InsetExternal.h"
 #include "insets/InsetGraphics.h"
+#include "insets/InsetNote.h"
 #include "insets/InsetRef.h"
 #include "insets/InsetText.h"
-#include "insets/InsetNote.h"
+
+#include "mathed/MathData.h"
 
 #include "frontends/alert.h"
 #include "frontends/Application.h"
 #include "frontends/Painter.h"
 #include "frontends/Selection.h"
 
-#include "graphics/Previews.h"
-
 #include "support/convert.h"
 #include "support/debug.h"
 #include "support/ExceptionMessage.h"
 #include "support/filetools.h"
 #include "support/gettext.h"
+#include "support/lassert.h"
 #include "support/lstrings.h"
 #include "support/Package.h"
 #include "support/types.h"
@@ -83,6 +87,7 @@
 #include <fstream>
 #include <functional>
 #include <iterator>
+#include <sstream>
 #include <vector>
 
 using namespace std;
@@ -106,9 +111,7 @@ T * getInsetByCode(Cursor const & cur, InsetCode code)
 }
 
 
-bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
-       bool same_content);
-
+/// Note that comparing contents can only be used for InsetCommand
 bool findNextInset(DocIterator & dit, vector<InsetCode> const & codes,
        docstring const & contents)
 {
@@ -116,12 +119,17 @@ bool findNextInset(DocIterator & dit, vector<InsetCode> const & codes,
 
        while (tmpdit) {
                Inset const * inset = tmpdit.nextInset();
-               if (inset
-                   && std::find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()
-                   && (contents.empty() ||
-                   static_cast<InsetCommand const *>(inset)->getFirstNonOptParam() == contents)) {
-                       dit = tmpdit;
-                       return true;
+               if (inset) {
+                       bool const valid_code = std::find(codes.begin(), codes.end(),
+                               inset->lyxCode()) != codes.end();
+                       InsetCommand const * ic = inset->asInsetCommand();
+                       bool const same_or_no_contents =  contents.empty()
+                               || (ic && (ic->getFirstNonOptParam() == contents));
+
+                       if (valid_code && same_or_no_contents) {
+                               dit = tmpdit;
+                               return true;
+                       }
                }
                tmpdit.forwardInset();
        }
@@ -131,6 +139,7 @@ bool findNextInset(DocIterator & dit, vector<InsetCode> const & codes,
 
 
 /// Looks for next inset with one of the given codes.
+/// Note that same_content can only be used for InsetCommand
 bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
        bool same_content)
 {
@@ -140,21 +149,26 @@ bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
        if (!tmpdit)
                return false;
 
-       if (same_content) {
-               Inset const * inset = tmpdit.nextInset();
-               if (inset
-                   && std::find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()) {
-                       contents = static_cast<InsetCommand const *>(inset)->getFirstNonOptParam();
+       Inset const * inset = tmpdit.nextInset();
+       if (same_content && inset) {
+               InsetCommand const * ic = inset->asInsetCommand();
+               if (ic) {
+                       bool const valid_code = std::find(codes.begin(), codes.end(),
+                               ic->lyxCode()) != codes.end();
+                       if (valid_code)
+                               contents = ic->getFirstNonOptParam();
                }
        }
 
        if (!findNextInset(tmpdit, codes, contents)) {
                if (dit.depth() != 1 || dit.pit() != 0 || dit.pos() != 0) {
-                       tmpdit  = doc_iterator_begin(tmpdit.bottom().inset());
+                       Inset * inset = &tmpdit.bottom().inset();
+                       tmpdit = doc_iterator_begin(&inset->buffer(), inset);
                        if (!findNextInset(tmpdit, codes, contents))
                                return false;
-               } else
+               } else {
                        return false;
+               }
        }
 
        dit = tmpdit;
@@ -213,11 +227,17 @@ enum ScreenUpdateStrategy {
 
 struct BufferView::Private
 {
-       Private(BufferView & bv): wh_(0), cursor_(bv),
+       Private(BufferView & bv) : update_strategy_(NoScreenUpdate),
+               wh_(0), cursor_(bv),
                anchor_pit_(0), anchor_ypos_(0),
                inlineCompletionUniqueChars_(0),
-               last_inset_(0), gui_(0)
-       {}
+               last_inset_(0), clickable_inset_(false),
+               mouse_position_cache_(),
+               bookmark_edit_position_(-1), gui_(0),
+               horiz_scroll_offset_(0)
+       {
+               xsel_cache_.set = false;
+       }
 
        ///
        ScrollbarParameters scrollbarParameters_;
@@ -257,7 +277,17 @@ struct BufferView::Private
        /** kept to send setMouseHover(false).
          * Not owned, so don't delete.
          */
-       Inset * last_inset_;
+       Inset const * last_inset_;
+       /// are we hovering something that we can click
+       bool clickable_inset_;
+
+       /// position of the mouse at the time of the last mouse move
+       /// This is used to update the hovering status of inset in
+       /// cases where the buffer is scrolled, but the mouse didn't move.
+       Point mouse_position_cache_;
+
+       // cache for id of the paragraph which was edited the last time
+       int bookmark_edit_position_;
 
        mutable TextMetricsCache text_metrics_;
 
@@ -268,21 +298,35 @@ struct BufferView::Private
 
        /// Cache for Find Next
        FuncRequest search_request_cache_;
+
+       ///
+       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_;
 };
 
 
 BufferView::BufferView(Buffer & buf)
-       : width_(0), height_(0), full_screen_(false), buffer_(buf), d(new Private(*this))
+       : width_(0), height_(0), full_screen_(false), buffer_(buf),
+      d(new Private(*this))
 {
        d->xsel_cache_.set = false;
        d->intl_.initKeyMapper(lyxrc.use_kbmap);
 
+       d->cursor_.setBuffer(&buf);
        d->cursor_.push(buffer_.inset());
        d->cursor_.resetAnchor();
        d->cursor_.setCurrentFont();
 
-       if (graphics::Previews::status() != LyXRC::PREVIEW_OFF)
-               thePreviews().generateBufferPreviews(buffer_);
+       buffer_.updatePreviews();
 }
 
 
@@ -298,17 +342,21 @@ BufferView::~BufferView()
        fp.pos = d->cursor_.bottom().pos();
        theSession().lastFilePos().save(buffer_.fileName(), fp);
 
+       if (d->last_inset_)
+               d->last_inset_->setMouseHover(this, false);
+
        delete d;
 }
 
 
 int BufferView::rightMargin() const
 {
+       // The value used to be hardcoded to 10, which is 2.5mm at 100dpi
+       int const default_margin = Length(2.5, Length::MM).inPixels(0);
        // The additional test for the case the outliner is opened.
-       if (!full_screen_ ||
-               !lyxrc.full_screen_limit ||
-               width_ < lyxrc.full_screen_width + 20)
-                       return 10;
+       if (!full_screen_ || !lyxrc.full_screen_limit
+           || width_ < lyxrc.full_screen_width + 2 * default_margin)
+               return default_margin;
 
        return (width_ - lyxrc.full_screen_width) / 2;
 }
@@ -322,13 +370,13 @@ int BufferView::leftMargin() const
 
 bool BufferView::isTopScreen() const
 {
-       return d->scrollbarParameters_.position == d->scrollbarParameters_.min;
+       return 0 == d->scrollbarParameters_.min;
 }
 
 
 bool BufferView::isBottomScreen() const
 {
-       return d->scrollbarParameters_.position == d->scrollbarParameters_.max;
+       return 0 == d->scrollbarParameters_.max;
 }
 
 
@@ -368,14 +416,14 @@ Buffer const & BufferView::buffer() const
 }
 
 
-bool BufferView::fitCursor()
+bool BufferView::needsFitCursor() const
 {
        if (cursorStatus(d->cursor_) == CUR_INSIDE) {
                frontend::FontMetrics const & fm =
                        theFontMetrics(d->cursor_.getFont().fontInfo());
                int const asc = fm.maxAscent();
                int const des = fm.maxDescent();
-               Point const p = getPos(d->cursor_, d->cursor_.boundary());
+               Point const p = getPos(d->cursor_);
                if (p.y_ - asc >= 0 && p.y_ + des < height_)
                        return false;
        }
@@ -385,22 +433,21 @@ bool BufferView::fitCursor()
 
 void BufferView::processUpdateFlags(Update::flags flags)
 {
-       // last_inset_ points to the last visited inset. This pointer may become
-       // invalid because of keyboard editing. Since all such operations
-       // causes screen update(), I reset last_inset_ to avoid such a problem.
-       d->last_inset_ = 0;
        // This is close to a hot-path.
-       LYXERR(Debug::DEBUG, "BufferView::processUpdateFlags()"
+       LYXERR(Debug::PAINTING, "BufferView::processUpdateFlags()"
                << "[fitcursor = " << (flags & Update::FitCursor)
                << ", forceupdate = " << (flags & Update::Force)
                << ", singlepar = " << (flags & Update::SinglePar)
                << "]  buffer: " << &buffer_);
 
+       // FIXME Does this really need doing here? It's done in updateBuffer, and
+       // if the Buffer doesn't need updating, then do the macros?
        buffer_.updateMacros();
 
        // Now do the first drawing step if needed. This consists on updating
        // the CoordCache in updateMetrics().
        // The second drawing step is done in WorkArea::redraw() if needed.
+       // FIXME: is this still true now that Buffer::changed() is used all over?
 
        // Case when no explicit update is requested.
        if (!flags) {
@@ -411,24 +458,26 @@ void BufferView::processUpdateFlags(Update::flags flags)
 
        if (flags == Update::Decoration) {
                d->update_strategy_ = DecorationUpdate;
-               buffer_.changed();
+               buffer_.changed(false);
                return;
        }
 
        if (flags == Update::FitCursor
                || flags == (Update::Decoration | Update::FitCursor)) {
                // tell the frontend to update the screen if needed.
-               if (fitCursor()) {
+               if (needsFitCursor()) {
                        showCursor();
                        return;
                }
                if (flags & Update::Decoration) {
                        d->update_strategy_ = DecorationUpdate;
-                       buffer_.changed();
+                       buffer_.changed(false);
                        return;
                }
-               // no screen update is needed.
+               // no screen update is needed in principle, but this
+               // could change if cursor row needs horizontal scrolling.
                d->update_strategy_ = NoScreenUpdate;
+               buffer_.changed(false);
                return;
        }
 
@@ -440,19 +489,21 @@ void BufferView::processUpdateFlags(Update::flags flags)
 
        if (!(flags & Update::FitCursor)) {
                // Nothing to do anymore. Trigger a redraw and return
-               buffer_.changed();
+               buffer_.changed(false);
                return;
        }
 
        // updateMetrics() does not update paragraph position
        // This is done at draw() time. So we need a redraw!
-       buffer_.changed();
+       buffer_.changed(false);
 
-       if (fitCursor()) {
+       if (needsFitCursor()) {
                // The cursor is off screen so ensure it is visible.
                // refresh it:
                showCursor();
        }
+
+       updateHoveredInset();
 }
 
 
@@ -467,7 +518,7 @@ 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()
@@ -508,9 +559,11 @@ void BufferView::updateScrollbar()
        for (size_t i = last.first + 1; i != parsize; ++i)
                d->scrollbarParameters_.max += d->par_height_[i];
 
-       d->scrollbarParameters_.position = 0;
        // The reference is the top position so we remove one page.
-       d->scrollbarParameters_.max -= d->scrollbarParameters_.page_step;
+       if (lyxrc.scroll_below_document)
+               d->scrollbarParameters_.max -= minVisiblePart();
+       else
+               d->scrollbarParameters_.max -= d->scrollbarParameters_.page_step;
 }
 
 
@@ -531,8 +584,12 @@ 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())
+               return d->cursor_.inset().contextMenu(*this, x, y);
+
        // Get inset under mouse, if there is one.
        Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
        if (covering_inset)
@@ -542,30 +599,37 @@ docstring BufferView::contextMenu(int x, int y) const
 }
 
 
-void BufferView::scrollDocView(int value)
+
+void BufferView::scrollDocView(int const value, bool update)
 {
-       int const offset = value - d->scrollbarParameters_.position;
+       // The scrollbar values are relative to the top of the screen, therefore the
+       // offset is equal to the target value.
+
+       // No scrolling at all? No need to redraw anything
+       if (value == 0)
+               return;
+
        // If the offset is less than 2 screen height, prefer to scroll instead.
-       if (abs(offset) <= 2 * height_) {
-               scroll(offset);
-               updateMetrics();
-               buffer_.changed();
+       if (abs(value) <= 2 * height_) {
+               d->anchor_ypos_ -= value;
+               buffer_.changed(true);
+               updateHoveredInset();
                return;
        }
 
        // cut off at the top
        if (value <= d->scrollbarParameters_.min) {
-               DocIterator dit = doc_iterator_begin(buffer_.inset());
-               showCursor(dit);
+               DocIterator dit = doc_iterator_begin(&buffer_);
+               showCursor(dit, false, update);
                LYXERR(Debug::SCROLLING, "scroll to top");
                return;
        }
 
        // cut off at the bottom
        if (value >= d->scrollbarParameters_.max) {
-               DocIterator dit = doc_iterator_end(buffer_.inset());
+               DocIterator dit = doc_iterator_end(&buffer_);
                dit.backwardPos();
-               showCursor(dit);
+               showCursor(dit, false, update);
                LYXERR(Debug::SCROLLING, "scroll to bottom");
                return;
        }
@@ -583,14 +647,14 @@ void BufferView::scrollDocView(int value)
                // It seems we didn't find the correct pit so stay on the safe side and
                // scroll to bottom.
                LYXERR0("scrolling position not found!");
-               scrollDocView(d->scrollbarParameters_.max);
+               scrollDocView(d->scrollbarParameters_.max, update);
                return;
        }
 
-       DocIterator dit = doc_iterator_begin(buffer_.inset());
+       DocIterator dit = doc_iterator_begin(&buffer_);
        dit.pit() = i;
        LYXERR(Debug::SCROLLING, "value = " << value << " -> scroll to pit " << i);
-       showCursor(dit);
+       showCursor(dit, false, update);
 }
 
 
@@ -602,31 +666,38 @@ void BufferView::setCursorFromScrollbar()
        int const height = 2 * defaultRowHeight();
        int const first = height;
        int const last = height_ - height;
-       Cursor & cur = d->cursor_;
+       int newy = 0;
+       Cursor const & oldcur = d->cursor_;
 
-       switch (cursorStatus(cur)) {
+       switch (cursorStatus(oldcur)) {
        case CUR_ABOVE:
-               // We reset the cursor because cursorStatus() does not
-               // work when the cursor is within mathed.
-               cur.reset(buffer_.inset());
-               tm.setCursorFromCoordinates(cur, 0, first);
-               cur.clearSelection();
+               newy = first;
                break;
        case CUR_BELOW:
-               // We reset the cursor because cursorStatus() does not
-               // work when the cursor is within mathed.
-               cur.reset(buffer_.inset());
-               tm.setCursorFromCoordinates(cur, 0, last);
-               cur.clearSelection();
+               newy = last;
                break;
        case CUR_INSIDE:
-               int const y = getPos(cur, cur.boundary()).y_;
-               int const newy = min(last, max(y, first));
-               if (y != newy) {
-                       cur.reset(buffer_.inset());
-                       tm.setCursorFromCoordinates(cur, 0, newy);
-               }
+               int const y = getPos(oldcur).y_;
+               newy = min(last, max(y, first));
+               if (y == newy)
+                       return;
        }
+       // We reset the cursor because cursorStatus() does not
+       // work when the cursor is within mathed.
+       Cursor cur(*this);
+       cur.reset();
+       tm.setCursorFromCoordinates(cur, 0, newy);
+
+       // update the bufferview cursor and notify insets
+       // FIXME: Care about the d->cursor_ flags to redraw if needed
+       Cursor old = d->cursor_;
+       mouseSetCursor(cur);
+       // 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();
 }
 
 
@@ -636,6 +707,8 @@ Change const BufferView::getCurrentChange() const
                return Change(Change::UNCHANGED);
 
        DocIterator dit = d->cursor_.selectionBegin();
+       // The selected content might have been changed (see #7685)
+       dit = dit.getInnerText();
        return dit.paragraph().lookupChange(dit.pos());
 }
 
@@ -644,7 +717,7 @@ Change const BufferView::getCurrentChange() const
 // FIXME: This does not work within mathed!
 CursorStatus BufferView::cursorStatus(DocIterator const & dit) const
 {
-       Point const p = getPos(dit, dit.boundary());
+       Point const p = getPos(dit);
        if (p.y_ < 0)
                return CUR_ABOVE;
        if (p.y_ > workHeight())
@@ -653,23 +726,35 @@ CursorStatus BufferView::cursorStatus(DocIterator const & dit) const
 }
 
 
+void BufferView::bookmarkEditPosition()
+{
+       // Don't eat cpu time for each keystroke
+       if (d->cursor_.paragraph().id() == d->bookmark_edit_position_)
+               return;
+       saveBookmark(0);
+       d->bookmark_edit_position_ = d->cursor_.paragraph().id();
+}
+
+
 void BufferView::saveBookmark(unsigned int idx)
 {
-       // tenatively save bookmark, id and pos will be used to
+       // tentatively 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.
-       theSession().bookmarks().save(
-               buffer_.fileName(),
-               d->cursor_.bottom().pit(),
-               d->cursor_.bottom().pos(),
-               d->cursor_.paragraph().id(),
-               d->cursor_.pos(),
-               idx
-       );
-       if (idx)
-               // emit message signal.
-               message(_("Save bookmark"));
+       if (!buffer_.isInternal()) {
+               theSession().bookmarks().save(
+                       buffer_.fileName(),
+                       d->cursor_.bottom().pit(),
+                       d->cursor_.bottom().pos(),
+                       d->cursor_.paragraph().id(),
+                       d->cursor_.pos(),
+                       idx
+                       );
+               if (idx)
+                       // emit message signal.
+                       message(_("Save bookmark"));
+       }
 }
 
 
@@ -696,7 +781,7 @@ bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
                        // insets.
                        size_t const n = dit.depth();
                        for (size_t i = 0; i < n; ++i)
-                               if (dit[i].inset().editable() != Inset::HIGHLY_EDITABLE) {
+                               if (!dit[i].inset().editable()) {
                                        dit.resize(i);
                                        break;
                                }
@@ -711,8 +796,8 @@ bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
        // it will be restored to the left of the outmost inset that contains
        // the bookmark.
        if (bottom_pit < int(buffer_.paragraphs().size())) {
-               dit = doc_iterator_begin(buffer_.inset());
-                               
+               dit = doc_iterator_begin(&buffer_);
+
                dit.pit() = bottom_pit;
                dit.pos() = min(bottom_pos, dit.paragraph().size());
                success = true;
@@ -723,11 +808,13 @@ bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
                setCursor(dit);
                // set the current font.
                d->cursor_.setCurrentFont();
+               // Do not forget to reset the anchor (see #9912)
+               d->cursor_.resetAnchor();
                // To center the screen on this new position we need the
                // paragraph position which is computed at draw() time.
                // So we need a redraw!
-               buffer_.changed();
-               if (fitCursor())
+               buffer_.changed(false);
+               if (needsFitCursor())
                        showCursor();
        }
 
@@ -737,14 +824,12 @@ 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);
@@ -757,18 +842,43 @@ int BufferView::workWidth() const
 }
 
 
+void BufferView::recenter()
+{
+       showCursor(d->cursor_, true, true);
+}
+
+
 void BufferView::showCursor()
 {
-       showCursor(d->cursor_);
+       showCursor(d->cursor_, false, true);
+}
+
+
+void BufferView::showCursor(DocIterator const & dit,
+       bool recenter, bool update)
+{
+       if (scrollToCursor(dit, recenter) && update) {
+               buffer_.changed(true);
+               updateHoveredInset();
+       }
 }
 
 
-void BufferView::showCursor(DocIterator const & dit)
+void BufferView::scrollToCursor()
+{
+       if (scrollToCursor(d->cursor_, false)) {
+               buffer_.changed(true);
+               updateHoveredInset();
+       }
+}
+
+
+bool BufferView::scrollToCursor(DocIterator const & dit, bool recenter)
 {
        // We are not properly started yet, delay until resizing is
        // done.
        if (height_ == 0)
-               return;
+               return false;
 
        LYXERR(Debug::SCROLLING, "recentering!");
 
@@ -791,24 +901,43 @@ void BufferView::showCursor(DocIterator const & dit)
 
        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, dit.boundary()).y_;
+               int offset = coordOffset(dit).y_;
                int ypos = pm.position() + offset;
                Dimension const & row_dim =
                        pm.getRow(cs.pos(), dit.boundary()).dimension();
                int scrolled = 0;
-               if (ypos - row_dim.ascent() < 0)
-                       scrolled = scrollUp(- ypos + row_dim.ascent());
-               else if (ypos + row_dim.descent() > height_)
-                       scrolled = scrollDown(ypos - height_ + row_dim.descent());
-               // else, nothing to do, the cursor is already visible so we just return.
-               if (scrolled != 0) {
-                       updateMetrics();
-                       buffer_.changed();
+               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);
                }
-               return;
+
+               // 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 && ypos < height_) {
+                       int ynew = row_dim.ascent();
+                       scrolled = scrollUp(ynew - ypos);
+               }
+
+               // If the bottom of the row falls of the screen, we scroll down.
+               else if (ypos + row_dim.descent() > height_ && ypos > 0) {
+                       int ynew = height_ - row_dim.descent();
+                       scrolled = scrollDown(ypos - ynew);
+               }
+
+               // else, nothing to do, the cursor is already visible so we just return.
+               return scrolled != 0;
        }
 
        // fix inline completion position
@@ -817,119 +946,200 @@ void BufferView::showCursor(DocIterator const & dit)
 
        tm.redoParagraph(bot_pit);
        ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
-       int offset = coordOffset(dit, dit.boundary()).y_;
+       int offset = coordOffset(dit).y_;
 
        d->anchor_pit_ = bot_pit;
        CursorSlice const & cs = dit.innerTextSlice();
        Dimension const & row_dim =
                pm.getRow(cs.pos(), dit.boundary()).dimension();
 
-       if (d->anchor_pit_ == 0)
+       if (recenter)
+               d->anchor_ypos_ = height_/2;
+       else if (d->anchor_pit_ == 0)
                d->anchor_ypos_ = offset + pm.ascent();
        else if (d->anchor_pit_ == max_pit)
                d->anchor_ypos_ = height_ - offset - row_dim.descent();
+       else if (offset > height_)
+               d->anchor_ypos_ = height_ - offset - defaultRowHeight();
        else
-               d->anchor_ypos_ = defaultRowHeight() * 2 - offset - row_dim.descent();
+               d->anchor_ypos_ = defaultRowHeight() * 2;
 
-       updateMetrics();
-       buffer_.changed();
+       return true;
 }
 
 
-FuncStatus BufferView::getStatus(FuncRequest const & cmd)
+void BufferView::makeDocumentClass()
 {
-       FuncStatus flag;
+       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(
+                       olddc, buffer_.params().documentClassPtr(),
+                       static_cast<InsetText &>(buffer_.inset()), el);
+
+       setCursor(backcur.asDocIterator(&buffer_));
+
+       buffer_.errors("Class Switch");
+}
+
+
+/** Return the change status at cursor position, taking into account the
+ * status at each level of the document iterator (a table in a deleted
+ * footnote is deleted).
+ * When \param outer is true, the top slice is not looked at.
+ */
+static Change::Type lookupChangeType(DocIterator const & dit, bool outer = false)
+{
+       size_t const depth = dit.depth() - (outer ? 1 : 0);
+
+       for (size_t i = 0 ; i < depth ; ++i) {
+               CursorSlice const & slice = dit[i];
+               if (!slice.inset().inMathed()
+                   && slice.pos() < slice.paragraph().size()) {
+                       Change::Type const ch = slice.paragraph().lookupChange(slice.pos()).type;
+                       if (ch != Change::UNCHANGED)
+                               return ch;
+               }
+       }
+       return Change::UNCHANGED;
+}
+
+
+bool BufferView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
+{
+       FuncCode const act = cmd.action();
+
+       // Can we use a readonly buffer?
+       if (buffer_.isReadonly()
+           && !lyxaction.funcHasFlag(act, LyXAction::ReadOnly)
+           && !lyxaction.funcHasFlag(act, LyXAction::NoBuffer)) {
+               flag.message(from_utf8(N_("Document is read-only")));
+               flag.setEnabled(false);
+               return true;
+       }
+
+       // Are we in a DELETED change-tracking region?
+       if (lookupChangeType(d->cursor_, true) == Change::DELETED
+           && !lyxaction.funcHasFlag(act, LyXAction::ReadOnly)
+           && !lyxaction.funcHasFlag(act, LyXAction::NoBuffer)) {
+               flag.message(from_utf8(N_("This portion of the document is deleted.")));
+               flag.setEnabled(false);
+               return true;
+       }
 
        Cursor & cur = d->cursor_;
 
-       switch (cmd.action) {
+       if (cur.getStatus(cmd, flag))
+               return true;
+
+       switch (act) {
+
+       // FIXME: This is a bit problematic because we don't check if this is
+       // a document BufferView or not for these LFUNs. We probably have to
+       // dispatch both to currentBufferView() and, if that fails,
+       // to documentBufferView(); same as we do now for current Buffer and
+       // document Buffer. Ideally those LFUN should go to Buffer as they
+       // operate on the full Buffer and the cursor is only needed either for
+       // an Undo record or to restore a cursor position. But we don't know
+       // how to do that inside Buffer of course.
+       case LFUN_BUFFER_PARAMS_APPLY:
+       case LFUN_LAYOUT_MODULES_CLEAR:
+       case LFUN_LAYOUT_MODULE_ADD:
+       case LFUN_LAYOUT_RELOAD:
+       case LFUN_TEXTCLASS_APPLY:
+       case LFUN_TEXTCLASS_LOAD:
+               flag.setEnabled(!buffer_.isReadonly());
+               break;
 
        case LFUN_UNDO:
-               flag.setEnabled(buffer_.undo().hasUndoStack());
+               // We do not use the LyXAction flag for readonly because Undo sets the
+               // buffer clean/dirty status by itself.
+               flag.setEnabled(!buffer_.isReadonly() && buffer_.undo().hasUndoStack());
                break;
        case LFUN_REDO:
-               flag.setEnabled(buffer_.undo().hasRedoStack());
+               // We do not use the LyXAction flag for readonly because Redo sets the
+               // buffer clean/dirty status by itself.
+               flag.setEnabled(!buffer_.isReadonly() && buffer_.undo().hasRedoStack());
                break;
-       case LFUN_FILE_INSERT:
        case LFUN_FILE_INSERT_PLAINTEXT_PARA:
-       case LFUN_FILE_INSERT_PLAINTEXT:
+       case LFUN_FILE_INSERT_PLAINTEXT: {
+               docstring const fname = cmd.argument();
+               if (!FileName::isAbsolute(to_utf8(fname))) {
+                       flag.message(_("Absolute filename expected."));
+                       return false;
+               }
+               flag.setEnabled(cur.inTexted());
+               break;
+       }
+       case LFUN_FILE_INSERT:
        case LFUN_BOOKMARK_SAVE:
                // FIXME: Actually, these LFUNS should be moved to Text
                flag.setEnabled(cur.inTexted());
                break;
+
        case LFUN_FONT_STATE:
        case LFUN_LABEL_INSERT:
        case LFUN_INFO_INSERT:
-       case LFUN_INSET_EDIT:
        case LFUN_PARAGRAPH_GOTO:
        case LFUN_NOTE_NEXT:
        case LFUN_REFERENCE_NEXT:
        case LFUN_WORD_FIND:
+       case LFUN_WORD_FIND_FORWARD:
+       case LFUN_WORD_FIND_BACKWARD:
        case LFUN_WORD_REPLACE:
        case LFUN_MARK_OFF:
        case LFUN_MARK_ON:
        case LFUN_MARK_TOGGLE:
        case LFUN_SCREEN_RECENTER:
+       case LFUN_SCREEN_SHOW_CURSOR:
        case LFUN_BIBTEX_DATABASE_ADD:
        case LFUN_BIBTEX_DATABASE_DEL:
-       case LFUN_GRAPHICS_GROUPS_UNIFY:
-       case LFUN_NOTES_MUTATE:
-       case LFUN_ALL_INSETS_TOGGLE:
        case LFUN_STATISTICS:
+       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_NEXT_INSET_TOGGLE: 
-       case LFUN_NEXT_INSET_MODIFY: {
-               // this is the real function we want to invoke
-               FuncRequest tmpcmd = cmd;
-               tmpcmd.action = (cmd.action == LFUN_NEXT_INSET_TOGGLE) 
-                       ? LFUN_INSET_TOGGLE : LFUN_INSET_MODIFY;
-               // if there is an inset at cursor, see whether it
-               // handles the lfun, other start from scratch
-               Inset * inset = cur.nextInset();
-               if (!inset || !inset->getStatus(cur, tmpcmd, flag))
-                       flag = lyx::getStatus(tmpcmd);
+       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: {
+       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);
-               break;
-
-       case LFUN_CHANGES_OUTPUT:
-               flag.setEnabled(true);
-               flag.setOnOff(buffer_.params().outputChanges);
-               break;
 
        case LFUN_CHANGES_MERGE:
        case LFUN_CHANGE_NEXT:
+       case LFUN_CHANGE_PREVIOUS:
        case LFUN_ALL_CHANGES_ACCEPT:
        case LFUN_ALL_CHANGES_REJECT:
-               // TODO: context-sensitive enabling of LFUNs
-               // In principle, these command should only be enabled if there
-               // is a change in the document. However, without proper
-               // optimizations, this will inevitably result in poor performance.
-               flag.setEnabled(true);
+               flag.setEnabled(buffer_.areChangesPresent());
                break;
 
-       case LFUN_BUFFER_TOGGLE_COMPRESSION: {
-               flag.setOnOff(buffer_.params().compressed);
-               break;
-       }
-       
        case LFUN_SCREEN_UP:
        case LFUN_SCREEN_DOWN:
        case LFUN_SCROLL:
        case LFUN_SCREEN_UP_SELECT:
        case LFUN_SCREEN_DOWN_SELECT:
+       case LFUN_INSET_FORALL:
                flag.setEnabled(true);
                break;
 
@@ -938,107 +1148,221 @@ FuncStatus BufferView::getStatus(FuncRequest const & cmd)
                break;
 
        case LFUN_LAYOUT:
-               LYXERR0("BufferView::getStatus(LFUN_LAYOUT)");
                flag.setEnabled(!cur.inset().forcePlainLayout(cur.idx()));
                break;
 
        case LFUN_LAYOUT_PARAGRAPH:
-               LYXERR0("BufferView::getStatus(LFUN_LAYOUT_PARAGRAPH)");
                flag.setEnabled(cur.inset().allowParagraphCustomization(cur.idx()));
                break;
 
-       case LFUN_INSET_SETTINGS: {
-               InsetCode code = cur.inset().lyxCode();
-               if (cmd.getArg(0) == insetName(code)) {
-                       flag.setEnabled(true);
-                       break;
-               }
-               bool enable = false;
-               InsetCode next_code = cur.nextInset()
-                       ? cur.nextInset()->lyxCode() : NO_CODE;
-               //FIXME: remove these special cases:
-               switch (next_code) {
-                       case TABULAR_CODE:
-                       case ERT_CODE:
-                       case FLOAT_CODE:
-                       case WRAP_CODE:
-                       case NOTE_CODE:
-                       case BRANCH_CODE:
-                       case BOX_CODE:
-                       case LISTINGS_CODE:
-                               enable = (cmd.argument().empty() ||
-                                         cmd.getArg(0) == insetName(next_code));
-                               break;
-                       default:
-                               break;
-               }
-               flag.setEnabled(enable);
+       case LFUN_BRANCH_ADD_INSERT:
+               flag.setEnabled(!(cur.inTexted() && cur.paragraph().isPassThru()));
                break;
-       }
 
        case LFUN_DIALOG_SHOW_NEW_INSET:
-               flag.setEnabled(cur.inset().lyxCode() != ERT_CODE &&
-                       cur.inset().lyxCode() != LISTINGS_CODE);
-               if (cur.inset().lyxCode() == CAPTION_CODE) {
-                       FuncStatus flag;
-                       if (cur.inset().getStatus(cur, cmd, flag))
-                               return flag;
-               }
+               // 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.inTexted() && cur.paragraph().isPassThru()));
                break;
 
-       case LFUN_BRANCH_ACTIVATE: 
-       case LFUN_BRANCH_DEACTIVATE: {
-               bool enable = false;
-               docstring const branchName = cmd.argument();
-               if (!branchName.empty())
-                       enable = buffer_.params().branchlist().find(branchName);
-               flag.setEnabled(enable);
+       case LFUN_CITATION_INSERT: {
+               FuncRequest fr(LFUN_INSET_INSERT, "citation");
+               // FIXME: This could turn in a recursive hell.
+               // Shouldn't we use Buffer::getStatus() instead?
+               flag.setEnabled(lyx::getStatus(fr).enabled());
+               break;
+       }
+       case LFUN_INSET_APPLY: {
+               string const name = cmd.getArg(0);
+               Inset * inset = editedInset(name);
+               if (inset) {
+                       FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
+                       if (!inset->getStatus(cur, fr, flag)) {
+                               // Every inset is supposed to handle this
+                               LASSERT(false, break);
+                       }
+               } else {
+                       FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
+                       flag = lyx::getStatus(fr);
+               }
                break;
        }
 
        default:
-               flag.setEnabled(false);
+               return false;
        }
 
-       return flag;
+       return true;
 }
 
 
-bool BufferView::dispatch(FuncRequest const & cmd)
+Inset * BufferView::editedInset(string const & name) const
 {
-       //lyxerr << [ cmd = " << cmd << "]" << endl;
+       map<string, Inset *>::const_iterator it = d->edited_insets_.find(name);
+       return it == d->edited_insets_.end() ? 0 : it->second;
+}
+
 
-       // 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() << ']');
+void BufferView::editInset(string const & name, Inset * inset)
+{
+       d->edited_insets_[name] = inset;
+}
 
+
+void BufferView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
+{
+       LYXERR(Debug::ACTION, "BufferView::dispatch: cmd: " << cmd);
+
+       string const argument = to_utf8(cmd.argument());
        Cursor & cur = d->cursor_;
+       Cursor old = cur;
+
+       // Don't dispatch function that does not apply to internal buffers.
+       if (buffer_.isInternal()
+           && lyxaction.funcHasFlag(cmd.action(), LyXAction::NoInternal))
+               return;
+
+       // We'll set this back to false if need be.
+       bool dispatched = true;
+       buffer_.undo().beginUndoGroup();
+
+       FuncCode const act = cmd.action();
+       switch (act) {
+
+       case LFUN_BUFFER_PARAMS_APPLY: {
+               DocumentClassConstPtr olddc = buffer_.params().documentClassPtr();
+               cur.recordUndoBufferParams();
+               istringstream ss(to_utf8(cmd.argument()));
+               Lexer lex;
+               lex.setStream(ss);
+               int const unknown_tokens = buffer_.readHeader(lex);
+               if (unknown_tokens != 0) {
+                       LYXERR0("Warning in LFUN_BUFFER_PARAMS_APPLY!\n"
+                                               << unknown_tokens << " unknown token"
+                                               << (unknown_tokens == 1 ? "" : "s"));
+               }
+               updateDocumentClass(olddc);
+
+               // We are most certainly here because of a change in the document
+               // It is then better to make sure that all dialogs are in sync with
+               // current document settings.
+               dr.screenUpdate(Update::Force | Update::FitCursor);
+               dr.forceBufferUpdate();
+               break;
+       }
+
+       case LFUN_LAYOUT_MODULES_CLEAR: {
+               // FIXME: this modifies the document in cap::switchBetweenClasses
+               //  without calling recordUndo. Fix this before using
+               //  recordUndoBufferParams().
+               cur.recordUndoFullBuffer();
+               buffer_.params().clearLayoutModules();
+               makeDocumentClass();
+               dr.screenUpdate(Update::Force);
+               dr.forceBufferUpdate();
+               break;
+       }
+
+       case LFUN_LAYOUT_MODULE_ADD: {
+               BufferParams const & params = buffer_.params();
+               if (!params.layoutModuleCanBeAdded(argument)) {
+                       LYXERR0("Module `" << argument <<
+                               "' cannot be added due to failed requirements or "
+                               "conflicts with installed modules.");
+                       break;
+               }
+               // FIXME: this modifies the document in cap::switchBetweenClasses
+               //  without calling recordUndo. Fix this before using
+               //  recordUndoBufferParams().
+               cur.recordUndoFullBuffer();
+               buffer_.params().addLayoutModule(argument);
+               makeDocumentClass();
+               dr.screenUpdate(Update::Force);
+               dr.forceBufferUpdate();
+               break;
+       }
+
+       case LFUN_TEXTCLASS_APPLY: {
+               // since this shortcircuits, the second call is made only if
+               // the first fails
+               bool const success =
+                       LayoutFileList::get().load(argument, buffer_.temppath()) ||
+                       LayoutFileList::get().load(argument, buffer_.filePath());
+               if (!success) {
+                       docstring s = bformat(_("The document class `%1$s' "
+                                                "could not be loaded."), from_utf8(argument));
+                       frontend::Alert::error(_("Could not load class"), s);
+                       break;
+               }
+
+               LayoutFile const * old_layout = buffer_.params().baseClass();
+               LayoutFile const * new_layout = &(LayoutFileList::get()[argument]);
+
+               if (old_layout == new_layout)
+                       // nothing to do
+                       break;
+
+               // Save the old, possibly modular, layout for use in conversion.
+               // FIXME: this modifies the document in cap::switchBetweenClasses
+               //  without calling recordUndo. Fix this before using
+               //  recordUndoBufferParams().
+               cur.recordUndoFullBuffer();
+               buffer_.params().setBaseClass(argument);
+               makeDocumentClass();
+               dr.screenUpdate(Update::Force);
+               dr.forceBufferUpdate();
+               break;
+       }
 
-       switch (cmd.action) {
+       case LFUN_TEXTCLASS_LOAD: {
+               // since this shortcircuits, the second call is made only if
+               // the first fails
+               bool const success =
+                       LayoutFileList::get().load(argument, buffer_.temppath()) ||
+                       LayoutFileList::get().load(argument, buffer_.filePath());
+               if (!success) {
+                       docstring s = bformat(_("The document class `%1$s' "
+                                                "could not be loaded."), from_utf8(argument));
+                       frontend::Alert::error(_("Could not load class"), s);
+               }
+               break;
+       }
+
+       case LFUN_LAYOUT_RELOAD: {
+               LayoutFileIndex bc = buffer_.params().baseClassID();
+               LayoutFileList::get().reset(bc);
+               buffer_.params().setBaseClass(bc);
+               makeDocumentClass();
+               dr.screenUpdate(Update::Force);
+               dr.forceBufferUpdate();
+               break;
+       }
 
        case LFUN_UNDO:
-               cur.message(_("Undo"));
+               dr.setMessage(_("Undo"));
                cur.clearSelection();
                if (!cur.textUndo())
-                       cur.message(_("No further undo information"));
+                       dr.setMessage(_("No further undo information"));
                else
-                       processUpdateFlags(Update::Force | Update::FitCursor);
+                       dr.screenUpdate(Update::Force | Update::FitCursor);
+               dr.forceBufferUpdate();
                break;
 
        case LFUN_REDO:
-               cur.message(_("Redo"));
+               dr.setMessage(_("Redo"));
                cur.clearSelection();
                if (!cur.textRedo())
-                       cur.message(_("No further redo information"));
+                       dr.setMessage(_("No further redo information"));
                else
-                       processUpdateFlags(Update::Force | Update::FitCursor);
+                       dr.screenUpdate(Update::Force | Update::FitCursor);
+               dr.forceBufferUpdate();
                break;
 
        case LFUN_FONT_STATE:
-               cur.message(cur.currentState());
+               dr.setMessage(cur.currentState());
                break;
 
        case LFUN_BOOKMARK_SAVE:
@@ -1049,36 +1373,20 @@ bool BufferView::dispatch(FuncRequest const & cmd)
                docstring label = cmd.argument();
                if (label.empty()) {
                        InsetRef * inset =
-                               getInsetByCode<InsetRef>(d->cursor_,
-                                                        REF_CODE);
+                               getInsetByCode<InsetRef>(cur, REF_CODE);
                        if (inset) {
                                label = inset->getParam("reference");
                                // persistent=false: use temp_bookmark
                                saveBookmark(0);
                        }
                }
-
-               if (!label.empty())
+               if (!label.empty()) {
                        gotoLabel(label);
-               break;
-       }
-       
-       case LFUN_INSET_EDIT: {
-               FuncRequest fr(cmd);
-               // if there is an inset at cursor, see whether it
-               // can be modified.
-               Inset * inset = cur.nextInset();
-               if (inset)
-                       inset->dispatch(cur, fr);
-               // if it did not work, try the underlying inset.
-               if (!inset || !cur.result().dispatched())
-                       cur.dispatch(cmd);
-
-               // FIXME I'm adding the last break to solve a crash,
-               // but that is obviously not right.
-               if (!cur.result().dispatched())
-                       // It did not work too; no action needed.
-                       break;
+                       // at the moment, this is redundant, since gotoLabel will
+                       // eventually call LFUN_PARAGRAPH_GOTO, but it seems best
+                       // to have it here.
+                       dr.screenUpdate(Update::Force | Update::FitCursor);
+               }
                break;
        }
 
@@ -1089,26 +1397,27 @@ bool BufferView::dispatch(FuncRequest const & cmd)
                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);
-                               processUpdateFlags(Update::Force | Update::FitCursor);
+                               cur.pos() = pos;
+                               mouseSetCursor(cur);
+                               dr.screenUpdate(Update::Force | Update::FitCursor);
                        } else {
                                // Switch to other buffer view and resend cmd
-                               theLyXFunc().dispatch(FuncRequest(
+                               lyx::dispatch(FuncRequest(
                                        LFUN_BUFFER_SWITCH, b->absFileName()));
-                               theLyXFunc().dispatch(cmd);
+                               lyx::dispatch(cmd);
                        }
                        break;
                }
@@ -1127,73 +1436,101 @@ bool BufferView::dispatch(FuncRequest const & cmd)
                break;
        }
 
-       case LFUN_CHANGES_TRACK:
-               buffer_.params().trackChanges = !buffer_.params().trackChanges;
-               break;
-
-       case LFUN_CHANGES_OUTPUT:
-               buffer_.params().outputChanges = !buffer_.params().outputChanges;
-               if (buffer_.params().outputChanges) {
-                       bool dvipost    = LaTeXFeatures::isAvailable("dvipost");
-                       bool xcolorsoul = LaTeXFeatures::isAvailable("soul") &&
-                                         LaTeXFeatures::isAvailable("xcolor");
-
-                       if (!dvipost && !xcolorsoul) {
-                               Alert::warning(_("Changes not shown in LaTeX output"),
-                                              _("Changes will not be highlighted in LaTeX output, "
-                                                "because neither dvipost nor xcolor/soul are installed.\n"
-                                                "Please install these packages or redefine "
-                                                "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
-                       } else if (!xcolorsoul) {
-                               Alert::warning(_("Changes not shown in LaTeX output"),
-                                              _("Changes will not be highlighted in LaTeX output "
-                                                "when using pdflatex, because xcolor and soul are not installed.\n"
-                                                "Please install both packages or redefine "
-                                                "\\lyxadded and \\lyxdeleted in the LaTeX preamble."));
-                       }
-               }
-               break;
-
        case LFUN_CHANGE_NEXT:
                findNextChange(this);
+               // FIXME: Move this LFUN to Buffer so that we don't have to do this:
+               dr.screenUpdate(Update::Force | Update::FitCursor);
+               break;
+
+       case LFUN_CHANGE_PREVIOUS:
+               findPreviousChange(this);
+               // FIXME: Move this LFUN to Buffer so that we don't have to do this:
+               dr.screenUpdate(Update::Force | Update::FitCursor);
                break;
 
        case LFUN_CHANGES_MERGE:
-               if (findNextChange(this))
+               if (findNextChange(this) || findPreviousChange(this)) {
+                       dr.screenUpdate(Update::Force | Update::FitCursor);
+                       dr.forceBufferUpdate();
                        showDialog("changes");
+               }
                break;
 
        case LFUN_ALL_CHANGES_ACCEPT:
                // select complete document
-               d->cursor_.reset(buffer_.inset());
-               d->cursor_.selHandle(true);
-               buffer_.text().cursorBottom(d->cursor_);
+               cur.reset();
+               cur.selHandle(true);
+               buffer_.text().cursorBottom(cur);
                // accept everything in a single step to support atomic undo
-               buffer_.text().acceptOrRejectChanges(d->cursor_, Text::ACCEPT);
+               buffer_.text().acceptOrRejectChanges(cur, Text::ACCEPT);
+               cur.resetAnchor();
                // FIXME: Move this LFUN to Buffer so that we don't have to do this:
-               processUpdateFlags(Update::Force | Update::FitCursor);
+               dr.screenUpdate(Update::Force | Update::FitCursor);
+               dr.forceBufferUpdate();
                break;
 
        case LFUN_ALL_CHANGES_REJECT:
                // select complete document
-               d->cursor_.reset(buffer_.inset());
-               d->cursor_.selHandle(true);
-               buffer_.text().cursorBottom(d->cursor_);
+               cur.reset();
+               cur.selHandle(true);
+               buffer_.text().cursorBottom(cur);
                // reject everything in a single step to support atomic undo
                // Note: reject does not work recursively; the user may have to repeat the operation
-               buffer_.text().acceptOrRejectChanges(d->cursor_, Text::REJECT);
+               buffer_.text().acceptOrRejectChanges(cur, Text::REJECT);
+               cur.resetAnchor();
                // FIXME: Move this LFUN to Buffer so that we don't have to do this:
-               processUpdateFlags(Update::Force | Update::FitCursor);
+               dr.screenUpdate(Update::Force | Update::FitCursor);
+               dr.forceBufferUpdate();
                break;
 
+       case LFUN_WORD_FIND_FORWARD:
+       case LFUN_WORD_FIND_BACKWARD: {
+               // FIXME THREAD
+               // Would it maybe be better if this variable were view specific anyway?
+               static docstring last_search;
+               docstring searched_string;
+
+               if (!cmd.argument().empty()) {
+                       last_search = cmd.argument();
+                       searched_string = cmd.argument();
+               } else {
+                       searched_string = last_search;
+               }
+
+               if (searched_string.empty())
+                       break;
+
+               bool const fw = act == LFUN_WORD_FIND_FORWARD;
+               docstring const data =
+                       find2string(searched_string, true, false, fw);
+               bool found = lyxfind(this, FuncRequest(LFUN_WORD_FIND, data));
+               if (found) {
+                       dr.screenUpdate(Update::Force | Update::FitCursor);
+                       cur.dispatched();
+                       dispatched = true;
+               } else {
+                       cur.undispatched();
+                       dispatched = false;
+               }
+               break;
+       }
+
        case LFUN_WORD_FIND: {
                FuncRequest req = cmd;
                if (cmd.argument().empty() && !d->search_request_cache_.argument().empty())
                        req = d->search_request_cache_;
-               if (find(this, req))
-                       showCursor();
-               else
-                       message(_("String not found!"));
+               if (req.argument().empty()) {
+                       lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, "findreplace"));
+                       break;
+               }
+               if (lyxfind(this, req)) {
+                       dr.screenUpdate(Update::Force | Update::FitCursor);
+                       cur.dispatched();
+                       dispatched = true;
+               } else {
+                       cur.undispatched();
+                       dispatched = false;
+               }
                d->search_request_cache_ = req;
                break;
        }
@@ -1205,64 +1542,95 @@ bool BufferView::dispatch(FuncRequest const & cmd)
                        DocIterator end = cur.selectionEnd();
                        if (beg.pit() == end.pit()) {
                                for (pos_type p = beg.pos() ; p < end.pos() ; ++p) {
-                                       if (cur.paragraph().isDeleted(p))
+                                       if (!cur.inMathed() && cur.paragraph().isDeleted(p)) {
                                                has_deleted = true;
+                                               break;
+                                       }
                                }
                        }
                }
-               replace(this, cmd, has_deleted);
+               if (lyxreplace(this, cmd, has_deleted)) {
+                       dr.forceBufferUpdate();
+                       dr.screenUpdate(Update::Force | Update::FitCursor);
+                       cur.dispatched();
+                       dispatched = true;
+               } else {
+                       cur.undispatched();
+                       dispatched = false;
+               }
+               break;
+       }
+
+       case LFUN_WORD_FINDADV: {
+               FindAndReplaceOptions opt;
+               istringstream iss(to_utf8(cmd.argument()));
+               iss >> opt;
+               if (findAdv(this, opt)) {
+                       dr.screenUpdate(Update::Force | Update::FitCursor);
+                       cur.dispatched();
+                       dispatched = true;
+               } else {
+                       cur.undispatched();
+                       dispatched = false;
+               }
                break;
        }
 
        case LFUN_MARK_OFF:
                cur.clearSelection();
-               cur.resetAnchor();
-               cur.message(from_utf8(N_("Mark off")));
+               dr.setMessage(from_utf8(N_("Mark off")));
                break;
 
        case LFUN_MARK_ON:
                cur.clearSelection();
-               cur.mark() = true;
-               cur.resetAnchor();
-               cur.message(from_utf8(N_("Mark on")));
+               cur.setMark(true);
+               dr.setMessage(from_utf8(N_("Mark on")));
                break;
 
        case LFUN_MARK_TOGGLE:
-               cur.clearSelection();
+               cur.selection(false);
                if (cur.mark()) {
-                       cur.mark() = false;
-                       cur.message(from_utf8(N_("Mark removed")));
+                       cur.setMark(false);
+                       dr.setMessage(from_utf8(N_("Mark removed")));
                } else {
-                       cur.mark() = true;
-                       cur.message(from_utf8(N_("Mark set")));
+                       cur.setMark(true);
+                       dr.setMessage(from_utf8(N_("Mark set")));
                }
                cur.resetAnchor();
                break;
 
-       case LFUN_SCREEN_RECENTER:
+       case LFUN_SCREEN_SHOW_CURSOR:
                showCursor();
                break;
 
+       case LFUN_SCREEN_RECENTER:
+               recenter();
+               break;
+
        case LFUN_BIBTEX_DATABASE_ADD: {
-               Cursor tmpcur = d->cursor_;
+               Cursor tmpcur = cur;
                findInset(tmpcur, BIBTEX_CODE, false);
                InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
                                                BIBTEX_CODE);
                if (inset) {
-                       if (inset->addDatabase(cmd.argument()))
-                               buffer_.updateBibfilesCache();
+                       if (inset->addDatabase(cmd.argument())) {
+                               buffer_.invalidateBibfileCache();
+                               dr.forceBufferUpdate();
+                       }
                }
                break;
        }
 
        case LFUN_BIBTEX_DATABASE_DEL: {
-               Cursor tmpcur = d->cursor_;
+               Cursor tmpcur = cur;
                findInset(tmpcur, BIBTEX_CODE, false);
                InsetBibtex * inset = getInsetByCode<InsetBibtex>(tmpcur,
                                                BIBTEX_CODE);
                if (inset) {
-                       if (inset->delDatabase(cmd.argument()))
-                               buffer_.updateBibfilesCache();
+                       if (inset->delDatabase(cmd.argument())) {
+                               buffer_.invalidateBibfileCache();
+                               dr.forceBufferUpdate();
+                       }
                }
                break;
        }
@@ -1273,12 +1641,13 @@ bool BufferView::dispatch(FuncRequest const & cmd)
                        from = cur.selectionBegin();
                        to = cur.selectionEnd();
                } else {
-                       from = doc_iterator_begin(buffer_.inset());
-                       to = doc_iterator_end(buffer_.inset());
+                       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:");
@@ -1306,178 +1675,372 @@ bool BufferView::dispatch(FuncRequest const & cmd)
        }
                break;
 
-       case LFUN_BUFFER_TOGGLE_COMPRESSION:
-               // turn compression on/off
-               buffer_.params().compressed = !buffer_.params().compressed;
-               break;
-       
-       case LFUN_NEXT_INSET_TOGGLE: {
-               // create the the real function we want to invoke
-               FuncRequest tmpcmd = cmd;
-               tmpcmd.action = LFUN_INSET_TOGGLE;
-               // if there is an inset at cursor, see whether it
-               // wants to toggle.
-               Inset * inset = cur.nextInset();
-               if (inset) {
-                       if (inset->isActive()) {
-                               Cursor tmpcur = cur;
-                               tmpcur.pushBackward(*inset);
-                               inset->dispatch(tmpcur, tmpcmd);
-                               if (tmpcur.result().dispatched())
-                                       cur.dispatched();
-                       } else 
-                               inset->dispatch(cur, tmpcmd);
-               }
-               // if it did not work, try the underlying inset.
-               if (!inset || !cur.result().dispatched())
-                       cur.dispatch(tmpcmd);
-
-               if (!cur.result().dispatched())
-                       // It did not work too; no action needed.
-                       break;
-               cur.clearSelection();
-               processUpdateFlags(Update::SinglePar | Update::FitCursor);
-               break;
-       }
-
-       case LFUN_NEXT_INSET_MODIFY: {
-               // create the the real function we want to invoke
-               FuncRequest tmpcmd = cmd;
-               tmpcmd.action = LFUN_INSET_MODIFY;
-               // if there is an inset at cursor, see whether it
-               // can be modified.
-               Inset * inset = cur.nextInset();
-               if (inset)
-                       inset->dispatch(cur, tmpcmd);
-               // if it did not work, try the underlying inset.
-               if (!inset || !cur.result().dispatched())
-                       cur.dispatch(tmpcmd);
-
-               if (!cur.result().dispatched())
-                       // It did not work too; no action needed.
-                       break;
-               cur.clearSelection();
-               processUpdateFlags(Update::Force | Update::FitCursor);
-               break;
-       }
-
        case LFUN_SCREEN_UP:
        case LFUN_SCREEN_DOWN: {
-               Point p = getPos(cur, cur.boundary());
-               if (p.y_ < 0 || p.y_ > height_) {
+               Point p = getPos(cur);
+               // This code has been commented out to enable to scroll down a
+               // document, even if there are large insets in it (see bug #5465).
+               /*if (p.y_ < 0 || p.y_ > height_) {
                        // The cursor is off-screen so recenter before proceeding.
                        showCursor();
-                       p = getPos(cur, cur.boundary());
-               }
-               int const scrolled = scroll(cmd.action == LFUN_SCREEN_UP
-                       ? - height_ : height_);
-               if (cmd.action == LFUN_SCREEN_UP && scrolled > - height_)
+                       p = getPos(cur);
+               }*/
+               int const scrolled = scroll(act == LFUN_SCREEN_UP
+                       ? -height_ : height_);
+               if (act == LFUN_SCREEN_UP && scrolled > -height_)
                        p = Point(0, 0);
-               if (cmd.action == LFUN_SCREEN_DOWN && scrolled < height_)
+               if (act == LFUN_SCREEN_DOWN && scrolled < height_)
                        p = Point(width_, height_);
-               cur.reset(buffer_.inset());
-               updateMetrics();
-               buffer_.changed();
-               d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_);
+               bool const in_texted = cur.inTexted();
+               cur.setCursor(doc_iterator_begin(cur.buffer()));
+               cur.selHandle(false);
+               buffer_.changed(true);
+               updateHoveredInset();
+
+               d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_,
+                       true, act == LFUN_SCREEN_UP);
                //FIXME: what to do with cur.x_target()?
+               bool update = in_texted && cur.bv().checkDepm(cur, old);
                cur.finishUndo();
+
+               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));
                        cur.finishUndo();
                        break;
                }
-               int y = getPos(cur, cur.boundary()).y_;
+               int y = getPos(cur).y_;
                int const ymin = y - height_ + defaultRowHeight();
                while (y > ymin && cur.up())
-                       y = getPos(cur, cur.boundary()).y_;
+                       y = getPos(cur).y_;
 
                cur.finishUndo();
-               processUpdateFlags(Update::SinglePar | Update::FitCursor);
+               dr.screenUpdate(Update::SinglePar | Update::FitCursor);
                break;
        }
 
        case LFUN_SCREEN_DOWN_SELECT: {
+               // FIXME: why is the algorithm different from LFUN_SCREEN_DOWN?
                cur.selHandle(true);
                if (isBottomScreen()) {
                        lyx::dispatch(FuncRequest(LFUN_BUFFER_END_SELECT));
                        cur.finishUndo();
                        break;
                }
-               int y = getPos(cur, cur.boundary()).y_;
+               int y = getPos(cur).y_;
                int const ymax = y + height_ - defaultRowHeight();
                while (y < ymax && cur.down())
-                       y = getPos(cur, cur.boundary()).y_;
+                       y = getPos(cur).y_;
 
                cur.finishUndo();
-               processUpdateFlags(Update::SinglePar | Update::FitCursor);
+               dr.screenUpdate(Update::SinglePar | Update::FitCursor);
                break;
        }
 
-       case LFUN_BRANCH_ACTIVATE:
-       case LFUN_BRANCH_DEACTIVATE:
-               buffer_.dispatch(cmd);
-               processUpdateFlags(Update::Force);
+
+       case LFUN_INSET_SELECT_ALL: {
+               // true if all cells are selected
+               bool const all_selected = cur.depth() > 1
+                   && cur.selBegin().at_begin()
+                   && cur.selEnd().at_end();
+               // true if some cells are selected
+               bool const cells_selected = cur.depth() > 1
+                   && cur.selBegin().at_cell_begin()
+                       && cur.selEnd().at_cell_end();
+               if (all_selected || (cells_selected && !cur.inset().isTable())) {
+                       // All the contents of the inset if selected, or only at
+                       // least one cell but inset is not a table.
+                       // Select the inset from outside.
+                       cur.pop();
+                       cur.resetAnchor();
+                       cur.selection(true);
+                       cur.posForward();
+               } else if (cells_selected) {
+                       // At least one complete cell is selected and inset is a table.
+                       // Select all cells
+                       cur.idx() = 0;
+                       cur.pos() = 0;
+                       cur.resetAnchor();
+                       cur.selection(true);
+                       cur.idx() = cur.lastidx();
+                       cur.pos() = cur.lastpos();
+               } else {
+                       // select current cell
+                       cur.pit() = 0;
+                       cur.pos() = 0;
+                       cur.resetAnchor();
+                       cur.selection(true);
+                       cur.pit() = cur.lastpit();
+                       cur.pos() = cur.lastpos();
+               }
+               cur.setCurrentFont();
+               dr.screenUpdate(Update::Force);
                break;
+       }
 
-       // These two could be rewriten using some command like forall <insetname> <command>
-       // once the insets refactoring is done.
-       case LFUN_GRAPHICS_GROUPS_UNIFY: {
-               if (cmd.argument().empty())
-                       break;
-               //view()->cursor().recordUndoFullDocument(); let inset-apply do that job
-               graphics::unifyGraphicsGroups(cur.buffer(), to_utf8(cmd.argument()));
-               processUpdateFlags(Update::Force | Update::FitCursor);
+
+       // This would be in Buffer class if only Cursor did not
+       // require a bufferview
+       case LFUN_INSET_FORALL: {
+               docstring const name = from_utf8(cmd.getArg(0));
+               string const commandstr = cmd.getLongArg(1);
+               FuncRequest const fr = lyxaction.lookupFunc(commandstr);
+
+               // an arbitrary number to limit number of iterations
+               const int max_iter = 100000;
+               int iterations = 0;
+               Cursor & cur = d->cursor_;
+               Cursor const savecur = cur;
+               cur.reset();
+               if (!cur.nextInset())
+                       cur.forwardInset();
+               cur.beginUndoGroup();
+               while(cur && iterations < max_iter) {
+                       Inset * const ins = cur.nextInset();
+                       if (!ins)
+                               break;
+                       docstring insname = ins->layoutName();
+                       while (!insname.empty()) {
+                               if (insname == name || name == from_utf8("*")) {
+                                       cur.recordUndo();
+                                       lyx::dispatch(fr, dr);
+                                       ++iterations;
+                                       break;
+                               }
+                               size_t const i = insname.rfind(':');
+                               if (i == string::npos)
+                                       break;
+                               insname = insname.substr(0, i);
+                       }
+                       // if we did not delete the inset, skip it
+                       if (!cur.nextInset() || cur.nextInset() == ins)
+                               cur.forwardInset();
+               }
+               cur = savecur;
+               cur.fixIfBroken();
+               /** This is a dummy undo record only to remember the cursor
+                * that has just been set; this will be used on a redo action
+                * (see ticket #10097)
+
+                * FIXME: a better fix would be to have a way to set the
+                * cursor value directly, but I am not sure it is worth it.
+                */
+               cur.recordUndo();
+               cur.endUndoGroup();
+               dr.screenUpdate(Update::Force);
+               dr.forceBufferUpdate();
+
+               if (iterations >= max_iter) {
+                       dr.setError(true);
+                       dr.setMessage(bformat(_("`inset-forall' interrupted because number of actions is larger than %1$d"), max_iter));
+               } else
+                       dr.setMessage(bformat(_("Applied \"%1$s\" to %2$d insets"), from_utf8(commandstr), iterations));
                break;
        }
 
-       case LFUN_NOTES_MUTATE: {
-               if (cmd.argument().empty())
-                       break;
-               cur.recordUndoFullDocument();
 
-               if (mutateNotes(cur, cmd.getArg(0), cmd.getArg(1))) {
-                       processUpdateFlags(Update::Force);
+       case LFUN_BRANCH_ADD_INSERT: {
+               docstring branch_name = from_utf8(cmd.getArg(0));
+               if (branch_name.empty())
+                       if (!Alert::askForText(branch_name, _("Branch name")) ||
+                                               branch_name.empty())
+                               break;
+
+               DispatchResult drtmp;
+               buffer_.dispatch(FuncRequest(LFUN_BRANCH_ADD, branch_name), drtmp);
+               if (drtmp.error()) {
+                       Alert::warning(_("Branch already exists"), drtmp.message());
+                       break;
+               }
+               BranchList & branch_list = buffer_.params().branchlist();
+               vector<docstring> const branches =
+                       getVectorFromString(branch_name, branch_list.separator());
+               for (vector<docstring>::const_iterator it = branches.begin();
+                    it != branches.end(); ++it) {
+                       branch_name = *it;
+                       lyx::dispatch(FuncRequest(LFUN_BRANCH_INSERT, branch_name));
                }
                break;
        }
 
-       case LFUN_ALL_INSETS_TOGGLE: {
-               string action;
-               string const name = split(to_utf8(cmd.argument()), action, ' ');
-               InsetCode const inset_code = insetCode(name);
+       case LFUN_KEYMAP_OFF:
+               getIntl().keyMapOn(false);
+               break;
+
+       case LFUN_KEYMAP_PRIMARY:
+               getIntl().keyMapPrim();
+               break;
+
+       case LFUN_KEYMAP_SECONDARY:
+               getIntl().keyMapSec();
+               break;
+
+       case LFUN_KEYMAP_TOGGLE:
+               getIntl().toggleKeyMap();
+               break;
+
+       case LFUN_DIALOG_SHOW_NEW_INSET: {
+               string const name = cmd.getArg(0);
+               string data = trim(to_utf8(cmd.argument()).substr(name.size()));
+               if (decodeInsetParam(name, data, buffer_))
+                       lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW, name + " " + data));
+               else
+                       lyxerr << "Inset type '" << name <<
+                       "' not recognized in LFUN_DIALOG_SHOW_NEW_INSET" <<  endl;
+               break;
+       }
 
-               FuncRequest fr(LFUN_INSET_TOGGLE, action);
+       case LFUN_CITATION_INSERT: {
+               if (argument.empty()) {
+                       lyx::dispatch(FuncRequest(LFUN_DIALOG_SHOW_NEW_INSET, "citation"));
+                       break;
+               }
+               // we can have one optional argument, delimited by '|'
+               // citation-insert <key>|<text_before>
+               // this should be enhanced to also support text_after
+               // and citation style
+               string arg = argument;
+               string opt1;
+               if (contains(argument, "|")) {
+                       arg = token(argument, '|', 0);
+                       opt1 = token(argument, '|', 1);
+               }
 
-               Inset & inset = cur.buffer().inset();
-               InsetIterator it  = inset_iterator_begin(inset);
-               InsetIterator const end = inset_iterator_end(inset);
-               for (; it != end; ++it) {
-                       if (it->asInsetCollapsable()
-                           && (inset_code == NO_CODE
-                           || inset_code == it->lyxCode())) {
-                               Cursor tmpcur = cur;
-                               tmpcur.pushBackward(*it);
-                               it->dispatch(tmpcur, fr);
+               // if our cursor is directly in front of or behind a citation inset,
+               // we will instead add the new key to it.
+               Inset * inset = cur.nextInset();
+               if (!inset || inset->lyxCode() != CITE_CODE)
+                       inset = cur.prevInset();
+               if (inset && inset->lyxCode() == CITE_CODE) {
+                       InsetCitation * icite = static_cast<InsetCitation *>(inset);
+                       if (icite->addKey(arg)) {
+                               dr.forceBufferUpdate();
+                               dr.screenUpdate(Update::FitCursor | Update::SinglePar);
+                               if (!opt1.empty())
+                                       LYXERR0("Discarding optional argument to citation-insert.");
                        }
+                       dispatched = true;
+                       break;
+               }
+               InsetCommandParams icp(CITE_CODE);
+               icp["key"] = from_utf8(arg);
+               if (!opt1.empty())
+                       icp["before"] = from_utf8(opt1);
+               string icstr = InsetCommand::params2string(icp);
+               FuncRequest fr(LFUN_INSET_INSERT, icstr);
+               lyx::dispatch(fr);
+               break;
+       }
+
+       case LFUN_INSET_APPLY: {
+               string const name = cmd.getArg(0);
+               Inset * inset = editedInset(name);
+               if (!inset) {
+                       FuncRequest fr(LFUN_INSET_INSERT, cmd.argument());
+                       lyx::dispatch(fr);
+                       break;
                }
-               processUpdateFlags(Update::Force | Update::FitCursor);
+               // put cursor in front of inset.
+               if (!setCursorFromInset(inset)) {
+                       LASSERT(false, break);
+               }
+               cur.recordUndo();
+               FuncRequest fr(LFUN_INSET_MODIFY, cmd.argument());
+               inset->dispatch(cur, fr);
+               dr.screenUpdate(cur.result().screenUpdate());
+               if (cur.result().needBufferUpdate())
+                       dr.forceBufferUpdate();
+               break;
+       }
+
+       // FIXME:
+       // The change of language of buffer belongs to the Buffer class.
+       // We have to do it here because we need a cursor for Undo.
+       // When Undo::recordUndoBufferParams() is implemented someday
+       // LFUN_BUFFER_LANGUAGE should be handled by the Buffer class.
+       case LFUN_BUFFER_LANGUAGE: {
+               Language const * oldL = buffer_.params().language;
+               Language const * newL = languages.getLanguage(argument);
+               if (!newL || oldL == newL)
+                       break;
+               if (oldL->rightToLeft() == newL->rightToLeft()) {
+                       cur.recordUndoFullBuffer();
+                       buffer_.changeLanguage(oldL, newL);
+                       cur.setCurrentFont();
+                       dr.forceBufferUpdate();
+               }
+               break;
+       }
+
+       case LFUN_FILE_INSERT_PLAINTEXT_PARA:
+       case LFUN_FILE_INSERT_PLAINTEXT: {
+               bool const as_paragraph = (act == LFUN_FILE_INSERT_PLAINTEXT_PARA);
+               string const fname = to_utf8(cmd.argument());
+               if (!FileName::isAbsolute(fname))
+                       dr.setMessage(_("Absolute filename expected."));
+               else
+                       insertPlaintextFile(FileName(fname), as_paragraph);
                break;
        }
 
        default:
-               return false;
+               // OK, so try the Buffer itself...
+               buffer_.dispatch(cmd, dr);
+               dispatched = dr.dispatched();
+               break;
        }
 
-       return true;
+       buffer_.undo().endUndoGroup();
+       dr.dispatched(dispatched);
+
+       // NOTE: The code below is copied from Cursor::dispatch. If you
+       // need to modify this, please update the other one too.
+
+       // notify insets we just entered/left
+       if (cursor() != old) {
+               old.beginUndoGroup();
+               old.fixIfBroken();
+               bool badcursor = notifyCursorLeavesOrEnters(old, cursor());
+               if (badcursor) {
+                       cursor().fixIfBroken();
+                       resetInlineCompletionPos();
+               }
+               old.endUndoGroup();
+       }
 }
 
 
@@ -1494,10 +2057,10 @@ docstring const BufferView::requestSelection()
        LYXERR(Debug::SELECTION, "requestSelection: xsel_cache.set: " << d->xsel_cache_.set);
        if (!d->xsel_cache_.set ||
            cur.top() != d->xsel_cache_.cursor ||
-           cur.anchor_.top() != d->xsel_cache_.anchor)
+           cur.realAnchor().top() != d->xsel_cache_.anchor)
        {
                d->xsel_cache_.cursor = cur.top();
-               d->xsel_cache_.anchor = cur.anchor_.top();
+               d->xsel_cache_.anchor = cur.realAnchor().top();
                d->xsel_cache_.set = cur.selection();
                return cur.selectionAsString(false);
        }
@@ -1515,7 +2078,7 @@ void BufferView::clearSelection()
        d->xsel_cache_.set = false;
        // The buffer did not really change, but this causes the
        // redraw we need because we cleared the selection above.
-       buffer_.changed();
+       buffer_.changed(false);
 }
 
 
@@ -1540,7 +2103,7 @@ Inset const * BufferView::getCoveringInset(Text const & text,
        if (!inset)
                return 0;
 
-       if (!inset->descendable())
+       if (!inset->descendable(*this))
                // No need to go further down if the inset is not
                // descendable.
                return inset;
@@ -1562,6 +2125,58 @@ Inset const * BufferView::getCoveringInset(Text const & text,
 }
 
 
+void BufferView::updateHoveredInset() const
+{
+       // Get inset under mouse, if there is one.
+       int const x = d->mouse_position_cache_.x_;
+       int const y = d->mouse_position_cache_.y_;
+       Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
+
+       d->clickable_inset_ = covering_inset && covering_inset->clickable(*this, x, y);
+
+       if (covering_inset == d->last_inset_)
+               // Same inset, no need to do anything...
+               return;
+
+       bool need_redraw = false;
+       if (d->last_inset_) {
+               // Remove the hint on the last hovered inset (if any).
+               need_redraw |= d->last_inset_->setMouseHover(this, false);
+               d->last_inset_ = 0;
+       }
+
+       if (covering_inset && covering_inset->setMouseHover(this, true)) {
+               need_redraw = true;
+               // 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_ = covering_inset;
+       }
+
+       if (need_redraw) {
+               LYXERR(Debug::PAINTING, "Mouse hover detected at: ("
+                               << d->mouse_position_cache_.x_ << ", "
+                               << d->mouse_position_cache_.y_ << ")");
+
+               d->update_strategy_ = DecorationUpdate;
+
+               // This event (moving without mouse click) is not passed further.
+               // This should be changed if it is further utilized.
+               buffer_.changed(false);
+       }
+}
+
+
+void BufferView::clearLastInset(Inset * inset) const
+{
+       if (d->last_inset_ != inset) {
+               LYXERR0("Wrong last_inset!");
+               LATTEST(false);
+       }
+       d->last_inset_ = 0;
+}
+
+
 void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
 {
        //lyxerr << "[ cmd0 " << cmd0 << "]" << endl;
@@ -1573,53 +2188,44 @@ void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
        Cursor old = cursor();
        Cursor cur(*this);
        cur.push(buffer_.inset());
-       cur.selection() = d->cursor_.selection();
+       cur.selection(d->cursor_.selection());
 
        // Either the inset under the cursor or the
        // surrounding Text will handle this event.
 
        // make sure we stay within the screen...
-       cmd.y = min(max(cmd.y, -1), height_);
-
-       if (cmd.action == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
-
-               // Get inset under mouse, if there is one.
-               Inset const * covering_inset =
-                       getCoveringInset(buffer_.text(), cmd.x, cmd.y);
-               if (covering_inset == d->last_inset_)
-                       // Same inset, no need to do anything...
-                       return;
+       cmd.set_y(min(max(cmd.y(), -1), height_));
 
-               bool need_redraw = false;
-               // const_cast because of setMouseHover().
-               Inset * inset = const_cast<Inset *>(covering_inset);
-               if (d->last_inset_)
-                       // Remove the hint on the last hovered inset (if any).
-                       need_redraw |= d->last_inset_->setMouseHover(false);
-               if (inset)
-                       // Highlighted the newly hovered inset (if any).
-                       need_redraw |= inset->setMouseHover(true);
-               d->last_inset_ = inset;
-               if (!need_redraw)
-                       return;
-
-               LYXERR(Debug::PAINTING, "Mouse hover detected at: ("
-                       << cmd.x << ", " << cmd.y << ")");
-
-               d->update_strategy_ = DecorationUpdate;
+       d->mouse_position_cache_.x_ = cmd.x();
+       d->mouse_position_cache_.y_ = cmd.y();
 
-               // This event (moving without mouse click) is not passed further.
-               // This should be changed if it is further utilized.
-               buffer_.changed();
+       if (cmd.action() == LFUN_MOUSE_MOTION && cmd.button() == mouse_button::none) {
+               updateHoveredInset();
                return;
        }
 
        // Build temporary cursor.
-       Inset * inset = d->text_metrics_[&buffer_.text()].editXY(cur, cmd.x, cmd.y);
+       Inset * inset = d->text_metrics_[&buffer_.text()].editXY(cur, cmd.x(), cmd.y());
+       if (inset) {
+               // If inset is not editable, cur.pos() might point behind the
+               // inset (depending on cmd.x(), cmd.y()). This is needed for
+               // editing to fix bug 9628, but e.g. the context menu needs a
+               // cursor in front of the inset.
+               if ((inset->hasSettings() || !inset->contextMenuName().empty()
+                    || inset->lyxCode() == SEPARATOR_CODE) &&
+                   cur.nextInset() != inset && cur.prevInset() == inset)
+                       cur.posBackward();
+       } else if (cur.inTexted() && cur.pos()
+                       && cur.paragraph().isEnvSeparator(cur.pos() - 1)) {
+               // Always place cursor in front of a separator inset.
+               cur.posBackward();
+       }
 
        // Put anchor at the same position.
        cur.resetAnchor();
 
+       cur.beginUndoGroup();
+
        // Try to dispatch to an non-editable inset near this position
        // via the temp cursor. If the inset wishes to change the real
        // cursor it has to do so explicitly by using
@@ -1634,41 +2240,31 @@ void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
 
        // Notify left insets
        if (cur != old) {
-               old.fixIfBroken();
-               bool badcursor = notifyCursorLeaves(old, cur);
+               bool badcursor = old.fixIfBroken() | cur.fixIfBroken();
+               badcursor |= notifyCursorLeavesOrEnters(old, cur);
                if (badcursor)
                        cursor().fixIfBroken();
        }
-       
+
+       cur.endUndoGroup();
+
        // 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().update())
-               processUpdateFlags(cur.result().update());
+       if (cur.result().dispatched() || cur.result().screenUpdate())
+               processUpdateFlags(cur.result().screenUpdate());
 }
 
 
-void BufferView::lfunScroll(FuncRequest const & cmd)
+int BufferView::minVisiblePart()
 {
-       string const scroll_type = cmd.getArg(0);
-       int const scroll_step = 
-               (scroll_type == "line") ? d->scrollbarParameters_.single_step
-               : (scroll_type == "page") ? d->scrollbarParameters_.page_step : 0;
-       if (scroll_step == 0)
-               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);
-       }
-       updateMetrics();
-       buffer_.changed();
+       return 2 * defaultRowHeight();
 }
 
 
@@ -1686,10 +2282,12 @@ int BufferView::scrollDown(int offset)
 {
        Text * text = &buffer_.text();
        TextMetrics & tm = d->text_metrics_[text];
-       int ymax = height_ + offset;
+       int const ymax = height_ + offset;
        while (true) {
                pair<pit_type, ParagraphMetrics const *> last = tm.last();
                int bottom_pos = last.second->position() + last.second->descent();
+               if (lyxrc.scroll_below_document)
+                       bottom_pos += height_ - minVisiblePart();
                if (last.first + 1 == int(text->paragraphs().size())) {
                        if (bottom_pos <= height_)
                                return 0;
@@ -1730,30 +2328,97 @@ int BufferView::scrollUp(int offset)
 
 void BufferView::setCursorFromRow(int row)
 {
-       int tmpid = -1;
-       int tmppos = -1;
+       setCursorFromRow(row, buffer_.texrow());
+}
 
-       buffer_.texrow().getIdFromRow(row, tmpid, tmppos);
 
-       d->cursor_.reset(buffer_.inset());
-       if (tmpid == -1)
-               buffer_.text().setCursor(d->cursor_, 0, 0);
-       else
-               buffer_.text().setCursor(d->cursor_, buffer_.getParFromID(tmpid).pit(), tmppos);
+void BufferView::setCursorFromRow(int row, TexRow const & texrow)
+{
+       int tmpid;
+       int tmppos;
+       pit_type newpit = 0;
+       pos_type newpos = 0;
+
+       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();
+       buffer_.text().setCursor(d->cursor_, newpit, newpos);
+       d->cursor_.selection(false);
+       d->cursor_.resetAnchor();
+       recenter();
+}
+
+
+bool BufferView::setCursorFromInset(Inset const * inset)
+{
+       // are we already there?
+       if (cursor().nextInset() == inset)
+               return true;
+
+       // Inset is not at cursor position. Find it in the document.
+       Cursor cur(*this);
+       cur.reset();
+       while (cur && cur.nextInset() != inset)
+               cur.forwardInset();
+
+       if (cur) {
+               setCursor(cur);
+               return true;
+       }
+       return false;
 }
 
 
 void BufferView::gotoLabel(docstring const & label)
 {
-       Toc & toc = buffer().tocBackend().toc("label");
-       TocIterator toc_it = toc.begin();
-       TocIterator end = toc.end();
-       for (; toc_it != end; ++toc_it) {
-               if (label == toc_it->str())
-                       dispatch(toc_it->action());
+       ListOfBuffers bufs = buffer().allRelatives();
+       ListOfBuffers::iterator it = bufs.begin();
+       for (; it != bufs.end(); ++it) {
+               Buffer const * buf = *it;
+
+               // find label
+               shared_ptr<Toc> toc = buf->tocBackend().toc("label");
+               Toc::const_iterator toc_it = toc->begin();
+               Toc::const_iterator end = toc->end();
+               for (; toc_it != end; ++toc_it) {
+                       if (label == toc_it->str()) {
+                               lyx::dispatch(toc_it->action());
+                               return;
+                       }
+               }
        }
-       //FIXME: We could do a bit more searching thanks to this:
-       //InsetLabel const * inset = buffer_.insetLabel(label);
 }
 
 
@@ -1765,6 +2430,7 @@ 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(
@@ -1789,12 +2455,19 @@ int BufferView::workHeight() const
 
 void BufferView::setCursor(DocIterator const & dit)
 {
+       d->cursor_.reset();
        size_t const n = dit.depth();
        for (size_t i = 0; i < n; ++i)
                dit[i].inset().edit(d->cursor_, true);
 
        d->cursor_.setCursor(dit);
-       d->cursor_.selection() = false;
+       d->cursor_.selection(false);
+       d->cursor_.setCurrentFont();
+       // FIXME
+       // It seems on general grounds as if this is probably needed, but
+       // it is not yet clear.
+       // See bug #7394 and r38388.
+       // d->cursor.resetAnchor();
 }
 
 
@@ -1816,44 +2489,47 @@ bool BufferView::checkDepm(Cursor & cur, Cursor & old)
 
        d->cursor_ = cur;
 
-       updateLabels(buffer_);
+       // we would rather not do this here, but it needs to be done before
+       // the changed() signal is sent.
+       buffer_.updateBuffer();
 
-       updateMetrics();
-       buffer_.changed();
+       buffer_.changed(true);
        return true;
 }
 
 
 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
                // persistent selection
                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 badcursor = false;
-       bool leftinset = (&d->cursor_.inset() != &cur.inset());
-       if (leftinset) {
+       bool const leftinset = (&d->cursor_.inset() != &cur.inset());
+       if (leftinset)
                d->cursor_.fixIfBroken();
-               badcursor = notifyCursorLeaves(d->cursor_, cur);
-               if (badcursor)
-                       cur.fixIfBroken();
-       }
 
        // FIXME: shift-mouse selection doesn't work well across insets.
-       bool do_selection = select && &d->cursor_.anchor().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?
        // FIXME: (2) if we had a working InsetText::notifyCursorLeaves,
        // the leftinset bool would not be necessary (badcursor instead).
        bool update = leftinset;
-       if (!do_selection && !badcursor && d->cursor_.inTexted())
+       if (!do_selection && d->cursor_.inTexted())
                update |= checkDepm(cur, d->cursor_);
 
+       if (!do_selection)
+               d->cursor_.resetAnchor();
        d->cursor_.setCursor(cur);
        d->cursor_.boundary(cur.boundary());
        if (do_selection)
@@ -1863,6 +2539,8 @@ bool BufferView::mouseSetCursor(Cursor & cur, bool select)
 
        d->cursor_.finishUndo();
        d->cursor_.setCurrentFont();
+       if (update)
+               cur.forceBufferUpdate();
        return update;
 }
 
@@ -1881,9 +2559,43 @@ void BufferView::putSelectionAt(DocIterator const & cur,
                } else
                        d->cursor_.setSelection(d->cursor_, length);
        }
-       // Ensure a redraw happens in any case because the new selection could 
-       // possibly be on the same screen as the previous selection.
-       processUpdateFlags(Update::Force | Update::FitCursor);
+}
+
+
+bool BufferView::selectIfEmpty(DocIterator & cur)
+{
+       if ((cur.inTexted() && !cur.paragraph().empty())
+           || (cur.inMathed() && !cur.cell().empty()))
+               return false;
+
+       pit_type const beg_pit = cur.pit();
+       if (beg_pit > 0) {
+               // The paragraph associated to this item isn't
+               // the first one, so it can be selected
+               cur.backwardPos();
+       } else {
+               // We have to resort to select the space between the
+               // end of this item and the begin of the next one
+               cur.forwardPos();
+       }
+       if (cur.empty()) {
+               // If it is the only item in the document,
+               // nothing can be selected
+               return false;
+       }
+       pit_type const end_pit = cur.pit();
+       pos_type const end_pos = cur.pos();
+       d->cursor_.clearSelection();
+       d->cursor_.reset();
+       d->cursor_.setCursor(cur);
+       d->cursor_.pit() = beg_pit;
+       d->cursor_.pos() = 0;
+       d->cursor_.selection(false);
+       d->cursor_.resetAnchor();
+       d->cursor_.pit() = end_pit;
+       d->cursor_.pos() = end_pos;
+       d->cursor_.setSelection();
+       return true;
 }
 
 
@@ -1921,7 +2633,7 @@ 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.
@@ -1958,7 +2670,7 @@ 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;
@@ -1966,19 +2678,19 @@ 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: "
@@ -2030,19 +2742,19 @@ 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
-       FileName filename = fileSearch(string(), fname.absFilename(), "lyx");
+       FileName filename = fileSearch(string(), fname.absFileName(), "lyx");
 
-       docstring const disp_fn = makeDisplayPath(filename.absFilename());
+       docstring const disp_fn = makeDisplayPath(filename.absFileName());
        // emit message signal.
        message(bformat(_("Inserting document %1$s..."), disp_fn));
 
        docstring res;
-       Buffer buf("", false);
-       if (buf.loadLyXFile(filename)) {
+       Buffer buf(filename.absFileName(), false);
+       if (buf.loadLyXFile() == Buffer::ReadSuccess) {
                ErrorList & el = buffer_.errorList("Parse");
                // Copy the inserted document error list into the current buffer one.
                el = buf.errorList("Parse");
@@ -2054,38 +2766,36 @@ void BufferView::insertLyXFile(FileName const & fname)
                res = _("Could not insert document %1$s");
        }
 
-       updateMetrics();
-       buffer_.changed();
+       buffer_.changed(true);
        // emit message signal.
        message(bformat(res, disp_fn));
-       buffer_.errors("Parse");
 }
 
 
-Point BufferView::coordOffset(DocIterator const & dit, bool boundary) const
+Point BufferView::coordOffset(DocIterator const & dit) const
 {
        int x = 0;
        int y = 0;
        int lastw = 0;
 
        // Addup contribution of nested insets, from inside to outside,
-       // keeping the outer paragraph for a special handling below
+       // keeping the outer paragraph for a special handling below
        for (size_t i = dit.depth() - 1; i >= 1; --i) {
                CursorSlice const & sl = dit[i];
                int xx = 0;
                int yy = 0;
-               
+
                // get relative position inside sl.inset()
-               sl.inset().cursorPos(*this, sl, boundary && (i + 1 == dit.depth()), xx, yy);
-               
+               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()) {
-                       bool boundary_i = boundary && i + 1 == dit.depth();
+                       bool boundary_i = dit.boundary() && i + 1 == dit.depth();
                        bool rtl = textMetrics(sl.text()).isRTL(sl, boundary_i);
                        if (rtl)
                                x -= lastw;
@@ -2099,14 +2809,13 @@ Point BufferView::coordOffset(DocIterator const & dit, bool boundary) const
                        // FIXME (Abdel 23/09/2007): this is a bit messy because of the
                        // elimination of Inset::dim_ cache. This coordOffset() method needs
                        // to be rewritten in light of the new design.
-                       Dimension const & dim = parMetrics(dit[i - 1].text(),
-                               dit[i - 1].pit()).insetDimension(&sl.inset());
+                       Dimension const & dim = coordCache().getInsets().dim(&sl.inset());
                        lastw = dim.wid;
                } else {
                        Dimension const dim = sl.inset().dimension(*this);
                        lastw = dim.wid;
                }
-               
+
                //lyxerr << "Cursor::getPos, i: "
                // << i << " x: " << xx << " y: " << y << endl;
        }
@@ -2115,16 +2824,17 @@ Point BufferView::coordOffset(DocIterator const & dit, bool boundary) 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
        size_t rend;
        if (sl.pos() > 0 && dit.depth() == 1) {
                int pos = sl.pos();
-               if (pos && boundary)
+               if (pos && dit.boundary())
                        --pos;
-//             lyxerr << "coordOffset: boundary:" << boundary << " depth:" << dit.depth() << " pos:" << pos << " sl.pos:" << sl.pos() << endl;
+//             lyxerr << "coordOffset: boundary:" << dit.boundary() << " depth:" << dit.depth() << " pos:" << pos << " sl.pos:" << sl.pos() << endl;
                rend = pm.pos2row(pos);
        } else
                rend = pm.pos2row(sl.pos());
@@ -2134,63 +2844,243 @@ Point BufferView::coordOffset(DocIterator const & dit, bool boundary) 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(), boundary && dit.depth() == 1);
+       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 = boundary && 1 == dit.depth();
+       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);
 }
 
 
-Point BufferView::getPos(DocIterator const & dit, bool boundary) const
+Point BufferView::getPos(DocIterator const & dit) const
 {
+       if (!paragraphVisible(dit))
+               return Point(-1, -1);
+
        CursorSlice const & bot = dit.bottom();
        TextMetrics const & tm = textMetrics(bot.text());
-       if (!tm.contains(bot.pit()))
-               return Point(-1, -1);
 
-       Point p = coordOffset(dit, boundary); // offset from outer paragraph
+       // offset from outer paragraph
+       Point p = coordOffset(dit);
        p.y_ += tm.parMetrics(bot.pit()).position();
        return p;
 }
 
 
+bool BufferView::paragraphVisible(DocIterator const & dit) const
+{
+       CursorSlice const & bot = dit.bottom();
+       TextMetrics const & tm = textMetrics(bot.text());
+
+       return tm.contains(bot.pit());
+}
+
+
+void BufferView::cursorPosAndHeight(Point & p, int & h) const
+{
+       Cursor const & cur = cursor();
+       Font const font = cur.getFont();
+       frontend::FontMetrics const & fm = theFontMetrics(font);
+       int const asc = fm.maxAscent();
+       int const des = fm.maxDescent();
+       h = asc + des;
+       p = getPos(cur);
+       p.y_ -= asc;
+}
+
+
+bool BufferView::cursorInView(Point const & p, int h) const
+{
+       Cursor const & cur = cursor();
+       // does the cursor touch the screen ?
+       if (p.y_ + h < 0 || p.y_ >= workHeight() || !paragraphVisible(cur))
+               return false;
+       return true;
+}
+
+
+int BufferView::horizScrollOffset() const
+{
+       return d->horiz_scroll_offset_;
+}
+
+
+int BufferView::horizScrollOffset(Text const * text,
+                                  pit_type pit, pos_type pos) const
+{
+       // Is this a row that is currently scrolled?
+       if (!d->current_row_slice_.empty()
+           && &text->inset() == d->current_row_slice_.inset().asInsetText()
+           && pit ==  d->current_row_slice_.pit()
+           && pos ==  d->current_row_slice_.pos())
+               return d->horiz_scroll_offset_;
+       return 0;
+}
+
+
+bool BufferView::hadHorizScrollOffset(Text const * text,
+                                      pit_type pit, pos_type pos) const
+{
+       return !d->last_row_slice_.empty()
+              && &text->inset() == d->last_row_slice_.inset().asInsetText()
+              && pit ==  d->last_row_slice_.pit()
+              && pos ==  d->last_row_slice_.pos();
+}
+
+
+void BufferView::setCurrentRowSlice(CursorSlice const & rowSlice)
+{
+       // nothing to do if the cursor was already on this row
+       if (d->current_row_slice_ == rowSlice) {
+               d->last_row_slice_ = CursorSlice();
+               return;
+       }
+
+       // if the (previous) current row was scrolled, we have to
+       // remember it in order to repaint it next time.
+       if (d->horiz_scroll_offset_ != 0)
+               d->last_row_slice_ = d->current_row_slice_;
+       else
+               d->last_row_slice_ = CursorSlice();
+
+       // Since we changed row, the scroll offset is not valid anymore
+       d->horiz_scroll_offset_ = 0;
+       d->current_row_slice_ = rowSlice;
+}
+
+
+void BufferView::checkCursorScrollOffset(PainterInfo & pi)
+{
+       CursorSlice rowSlice = d->cursor_.bottom();
+       TextMetrics const & tm = textMetrics(rowSlice.text());
+
+       // Stop if metrics have not been computed yet, since it means
+       // that there is nothing to do.
+       if (!tm.contains(rowSlice.pit()))
+               return;
+       ParagraphMetrics const & pm = tm.parMetrics(rowSlice.pit());
+       Row const & row = pm.getRow(rowSlice.pos(),
+                                   d->cursor_.boundary() && rowSlice == d->cursor_.top());
+       rowSlice.pos() = row.pos();
+
+       // Set the row on which the cursor lives.
+       setCurrentRowSlice(rowSlice);
+
+       // If insets referred to by cursor are not all in the cache, the positions
+       // need to be recomputed.
+       if (!d->cursor_.inCoordCache()) {
+               /** FIXME: the code below adds an extraneous computation of
+                * inset positions, and can therefore be bad for performance
+                * (think for example about a very large tabular inset.
+                * Redawing the row where it is means redrawing the whole
+                * screen).
+                *
+                * The bug that this fixes is the following: assume that there
+                * is a very large math inset. Upon entering the inset, when
+                * pressing `End', the row is not scrolled and the cursor is
+                * not visible. The extra row computation makes sure that the
+                * inset positions are correctly computed and set in the
+                * cache. This would not happen if we did not have two-stage
+                * drawing.
+                *
+                * A proper fix would be to always have proper inset positions
+                * at this point.
+                */
+               // Force the recomputation of inset positions
+               bool const drawing = pi.pain.isDrawingEnabled();
+               pi.pain.setDrawingEnabled(false);
+               // No need to care about vertical position.
+               RowPainter rp(pi, buffer().text(), row, -d->horiz_scroll_offset_, 0);
+               rp.paintText();
+               pi.pain.setDrawingEnabled(drawing);
+       }
+
+       // Current x position of the cursor in pixels
+       int cur_x = getPos(d->cursor_).x_;
+
+       // Horizontal scroll offset of the cursor row in pixels
+       int offset = d->horiz_scroll_offset_;
+       int const MARGIN = 2 * theFontMetrics(d->cursor_.real_current_font).em()
+                          + row.right_margin;
+       if (row.right_x() <= workWidth() - row.right_margin) {
+               // Row is narrower than the work area, no offset needed.
+               offset = 0;
+       } else {
+               if (cur_x - offset < MARGIN) {
+                       // cursor would be too far right
+                       offset = cur_x - MARGIN;
+               } else if (cur_x - offset > workWidth() - MARGIN) {
+                       // cursor would be too far left
+                       offset = cur_x - workWidth() + MARGIN;
+               }
+               // Correct the offset to make sure that we do not scroll too much
+               if (offset < 0)
+                       offset = 0;
+               if (row.right_x() - offset < workWidth() - row.right_margin)
+                       offset = row.right_x() - workWidth() + row.right_margin;
+       }
+
+       //lyxerr << "cur_x=" << cur_x << ", offset=" << offset << ", row.wid=" << row.width() << ", margin=" << MARGIN << endl;
+
+       if (offset != d->horiz_scroll_offset_)
+               LYXERR(Debug::PAINTING, "Horiz. scroll offset changed from "
+                      << d->horiz_scroll_offset_ << " to " << offset);
+
+       if (d->update_strategy_ == NoScreenUpdate
+           && (offset != d->horiz_scroll_offset_
+               || !d->last_row_slice_.empty())) {
+               // FIXME: if one uses SingleParUpdate, then home/end
+               // will not work on long rows. Why?
+               d->update_strategy_ = FullScreenUpdate;
+       }
+
+       d->horiz_scroll_offset_ = offset;
+}
+
+
 void BufferView::draw(frontend::Painter & pain)
 {
        if (height_ == 0 || width_ == 0)
                return;
        LYXERR(Debug::PAINTING, "\t\t*** START DRAWING ***");
+
        Text & text = buffer_.text();
        TextMetrics const & tm = d->text_metrics_[&text];
        int const y = tm.first().second->position();
        PainterInfo pi(this, pain);
 
+       // Check whether the row where the cursor lives needs to be scrolled.
+       // Update the drawing strategy if needed.
+       checkCursorScrollOffset(pi);
+
        switch (d->update_strategy_) {
 
        case NoScreenUpdate:
                // If no screen painting is actually needed, only some the different
                // coordinates of insets and paragraphs needs to be updated.
+               LYXERR(Debug::PAINTING, "Strategy: NoScreenUpdate");
                pi.full_repaint = true;
                pi.pain.setDrawingEnabled(false);
-               tm.draw(pi, 0, y);
+               tm.draw(pi, 0, y);
                break;
 
        case SingleParUpdate:
                pi.full_repaint = false;
+               LYXERR(Debug::PAINTING, "Strategy: SingleParUpdate");
                // In general, only the current row of the outermost paragraph
                // will be redrawn. Particular cases where selection spans
                // multiple paragraph are correctly detected in TextMetrics.
-               tm.draw(pi, 0, y);
+               tm.draw(pi, 0, y);
                break;
 
        case DecorationUpdate:
@@ -2199,12 +3089,18 @@ 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;
 
                // Clear background.
                pain.fillRectangle(0, 0, width_, height_,
-                       buffer_.inset().backgroundColor());
+                       pi.backgroundColor(&buffer_.inset()));
 
                // Draw everything.
                tm.draw(pi, 0, y);
@@ -2212,8 +3108,12 @@ 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_)
-                       pain.fillRectangle(0, y2, width_, height_ - y2, Color_bottomarea);
+
+               if (y2 < height_) {
+                       Color color = buffer().isInternal()
+                               ? Color_background : Color_bottomarea;
+                       pain.fillRectangle(0, y2, width_, height_ - y2, color);
+               }
                break;
        }
        LYXERR(Debug::PAINTING, "\n\t\t*** END DRAWING  ***");
@@ -2277,7 +3177,7 @@ docstring BufferView::contentsOfPlaintextFile(FileName const & fname)
 {
        if (!fname.isReadableFile()) {
                docstring const error = from_ascii(strerror(errno));
-               docstring const file = makeDisplayPath(fname.absFilename(), 50);
+               docstring const file = makeDisplayPath(fname.absFileName(), 50);
                docstring const text =
                  bformat(_("Could not read the specified document\n"
                            "%1$s\ndue to the error: %2$s"), file, error);
@@ -2286,7 +3186,7 @@ docstring BufferView::contentsOfPlaintextFile(FileName const & fname)
        }
 
        if (!fname.isReadableFile()) {
-               docstring const file = makeDisplayPath(fname.absFilename(), 50);
+               docstring const file = makeDisplayPath(fname.absFileName(), 50);
                docstring const text =
                  bformat(_("%1$s\n is not readable."), file);
                Alert::error(_("Could not open file"), text);
@@ -2320,12 +3220,11 @@ void BufferView::insertPlaintextFile(FileName const & f, bool asParagraph)
        cap::replaceSelection(cur);
        buffer_.undo().recordUndo(cur);
        if (asParagraph)
-               cur.innerText()->insertStringAsParagraphs(cur, tmpstr);
+               cur.innerText()->insertStringAsParagraphs(cur, tmpstr, cur.current_font);
        else
-               cur.innerText()->insertStringAsLines(cur, tmpstr);
+               cur.innerText()->insertStringAsLines(cur, tmpstr, cur.current_font);
 
-       updateMetrics();
-       buffer_.changed();
+       buffer_.changed(true);
 }
 
 
@@ -2347,17 +3246,25 @@ DocIterator const & BufferView::inlineCompletionPos() const
 }
 
 
+void BufferView::resetInlineCompletionPos()
+{
+       d->inlineCompletionPos_ = DocIterator();
+}
+
+
 bool samePar(DocIterator const & a, DocIterator const & b)
 {
        if (a.empty() && b.empty())
                return true;
        if (a.empty() || b.empty())
                return false;
+       if (a.depth() != b.depth())
+               return false;
        return &a.innerParagraph() == &b.innerParagraph();
 }
 
 
-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);
@@ -2366,9 +3273,9 @@ void BufferView::setInlineCompletion(Cursor & cur, DocIterator const & pos,
        bool singlePar = true;
        d->inlineCompletion_ = completion;
        d->inlineCompletionUniqueChars_ = min(completion.size(), uniqueChars);
-       
+
        //lyxerr << "setInlineCompletion pos=" << pos << " completion=" << completion << " uniqueChars=" << uniqueChars << std::endl;
-       
+
        // at new position?
        DocIterator const & old = d->inlineCompletionPos_;
        if (old != pos) {
@@ -2381,14 +3288,20 @@ void BufferView::setInlineCompletion(Cursor & cur, DocIterator const & pos,
                }
                d->inlineCompletionPos_ = pos;
        }
-       
+
        // set update flags
        if (changed) {
-               if (singlePar && !(cur.disp_.update() & Update::Force))
-                       cur.updateFlags(cur.disp_.update() | Update::SinglePar);
+               if (singlePar && !(cur.result().screenUpdate() & Update::Force))
+                       cur.screenUpdateFlags(cur.result().screenUpdate() | Update::SinglePar);
                else
-                       cur.updateFlags(cur.disp_.update() | Update::Force);
+                       cur.screenUpdateFlags(cur.result().screenUpdate() | Update::Force);
        }
 }
 
+
+bool BufferView::clickableInset() const
+{
+       return d->clickable_inset_;
+}
+
 } // namespace lyx