]> git.lyx.org Git - lyx.git/blobdiff - src/BufferView.cpp
Require a buffer on construction of InsetGraphics and InsetExternal. Eventually,...
[lyx.git] / src / BufferView.cpp
index 468e0a0a90dca355446099e731fa85d4dab7c404..9b3ae322bb3a3eec65c958a8035c6e3506ccfa89 100644 (file)
 #include "TextClass.h"
 #include "TextMetrics.h"
 #include "TexRow.h"
+#include "TocBackend.h"
 #include "VSpace.h"
 #include "WordLangTuple.h"
 
 #include "insets/InsetBibtex.h"
 #include "insets/InsetCommand.h" // ChangeRefs
+#include "insets/InsetExternal.h"
+#include "insets/InsetGraphics.h"
 #include "insets/InsetRef.h"
 #include "insets/InsetText.h"
 
 #include "frontends/alert.h"
+#include "frontends/Application.h"
 #include "frontends/Delegates.h"
 #include "frontends/FontMetrics.h"
 #include "frontends/Painter.h"
@@ -67,7 +71,7 @@
 
 #include "support/convert.h"
 #include "support/debug.h"
-#include "support/FileFilterList.h"
+#include "support/ExceptionMessage.h"
 #include "support/filetools.h"
 #include "support/gettext.h"
 #include "support/lstrings.h"
@@ -112,7 +116,7 @@ bool findNextInset(DocIterator & dit, vector<InsetCode> const & codes,
        while (tmpdit) {
                Inset const * inset = tmpdit.nextInset();
                if (inset
-                   && find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()
+                   && std::find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()
                    && (contents.empty() ||
                    static_cast<InsetCommand const *>(inset)->getFirstNonOptParam() == contents)) {
                        dit = tmpdit;
@@ -138,7 +142,7 @@ bool findInset(DocIterator & dit, vector<InsetCode> const & codes,
        if (same_content) {
                Inset const * inset = tmpdit.nextInset();
                if (inset
-                   && find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()) {
+                   && std::find(codes.begin(), codes.end(), inset->lyxCode()) != codes.end()) {
                        contents = static_cast<InsetCommand const *>(inset)->getFirstNonOptParam();
                }
        }
@@ -176,6 +180,7 @@ void gotoInset(BufferView * bv, vector<InsetCode> const & codes,
 
        tmpcur.clearSelection();
        bv->setCursor(tmpcur);
+       bv->showCursor();
 }
 
 
@@ -187,7 +192,7 @@ void gotoInset(BufferView * bv, InsetCode code, bool same_content)
 
 
 /// A map from a Text to the associated text metrics
-typedef std::map<Text const *, TextMetrics> TextMetricsCache;
+typedef map<Text const *, TextMetrics> TextMetricsCache;
 
 enum ScreenUpdateStrategy {
        NoScreenUpdate,
@@ -208,7 +213,7 @@ enum ScreenUpdateStrategy {
 struct BufferView::Private
 {
        Private(BufferView & bv): wh_(0), cursor_(bv),
-               anchor_ref_(0), offset_ref_(0), need_centering_(false),
+               anchor_pit_(0), anchor_ypos_(0),
                last_inset_(0), gui_(0)
        {}
 
@@ -230,11 +235,18 @@ struct BufferView::Private
        ///
        Cursor cursor_;
        ///
-       pit_type anchor_ref_;
+       pit_type anchor_pit_;
        ///
-       int offset_ref_;
+       int anchor_ypos_;
        ///
-       bool need_centering_;
+       vector<int> par_height_;
+
+       ///
+       DocIterator inlineCompletionPos;
+       ///
+       docstring inlineCompletion;
+       ///
+       size_t inlineCompletionUniqueChars;
 
        /// keyboard mapping object.
        Intl intl_;
@@ -255,7 +267,7 @@ struct BufferView::Private
 
 
 BufferView::BufferView(Buffer & buf)
-       : width_(0), height_(0), 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);
@@ -285,6 +297,36 @@ BufferView::~BufferView()
 }
 
 
+int BufferView::rightMargin() const
+{
+       // 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;
+
+       return (width_ - lyxrc.full_screen_width) / 2;
+}
+
+
+int BufferView::leftMargin() const
+{
+       return rightMargin();
+}
+
+
+bool BufferView::isTopScreen() const
+{
+       return d->scrollbarParameters_.position == d->scrollbarParameters_.min;
+}
+
+
+bool BufferView::isBottomScreen() const
+{
+       return d->scrollbarParameters_.position == d->scrollbarParameters_.max;
+}
+
+
 Intl & BufferView::getIntl()
 {
        return d->intl_;
@@ -332,7 +374,6 @@ bool BufferView::fitCursor()
                if (p.y_ - asc >= 0 && p.y_ + des < height_)
                        return false;
        }
-       center();
        return true;
 }
 
@@ -350,9 +391,7 @@ void BufferView::processUpdateFlags(Update::flags flags)
                << ", singlepar = " << (flags & Update::SinglePar)
                << "]  buffer: " << &buffer_);
 
-       // Update macro store
-       if (!(cursor().inMathed() && cursor().inMacroMode()))
-               buffer_.updateMacros();
+       buffer_.updateMacros();
 
        // Now do the first drawing step if needed. This consists on updating
        // the CoordCache in updateMetrics().
@@ -373,11 +412,9 @@ void BufferView::processUpdateFlags(Update::flags flags)
 
        if (flags == Update::FitCursor
                || flags == (Update::Decoration | Update::FitCursor)) {
-               bool const fit_cursor = fitCursor();
                // tell the frontend to update the screen if needed.
-               if (fit_cursor) {
-                       updateMetrics();
-                       buffer_.changed();
+               if (fitCursor()) {
+                       showCursor();
                        return;
                }
                if (flags & Update::Decoration) {
@@ -390,85 +427,85 @@ void BufferView::processUpdateFlags(Update::flags flags)
                return;
        }
 
-       bool const full_metrics = flags & Update::Force;
+       bool const full_metrics = flags & Update::Force || !singleParUpdate();
 
-       if (full_metrics || !singleParUpdate())
+       if (full_metrics)
                // We have to update the full screen metrics.
                updateMetrics();
 
        if (!(flags & Update::FitCursor)) {
+               // Nothing to do anymore. Trigger a redraw and return
                buffer_.changed();
                return;
        }
 
-       //FIXME: updateMetrics() does not update paragraph position
+       // updateMetrics() does not update paragraph position
        // This is done at draw() time. So we need a redraw!
        buffer_.changed();
-       if (!fitCursor())
-               // The screen has already been updated thanks to the
-               // 'buffer_.changed()' call three line above. So no need
-               // to redraw again.
-               return;
 
-       // The screen has been recentered around the cursor position so
-       // refresh it:
-       updateMetrics();
-       buffer_.changed();
+       if (fitCursor()) {
+               // The cursor is off screen so ensure it is visible.
+               // refresh it:
+               showCursor();
+       }
 }
 
 
 void BufferView::updateScrollbar()
 {
-       Text & t = buffer_.text();
-       TextMetrics & tm = d->text_metrics_[&t];
+       if (height_ == 0)
+               return;
 
-       int const parsize = int(t.paragraphs().size() - 1);
-       if (d->anchor_ref_ >  parsize)  {
-               d->anchor_ref_ = parsize;
-               d->offset_ref_ = 0;
-       }
+       // We prefer fixed size line scrolling.
+       d->scrollbarParameters_.single_step = defaultRowHeight();
+       // We prefer full screen page scrolling.
+       d->scrollbarParameters_.page_step = height_;
+
+       Text & t = buffer_.text();
+       TextMetrics & tm = d->text_metrics_[&t];                
 
        LYXERR(Debug::GUI, " Updating scrollbar: height: "
                << t.paragraphs().size()
                << " curr par: " << d->cursor_.bottom().pit()
                << " default height " << defaultRowHeight());
 
-       // It would be better to fix the scrollbar to understand
-       // values in [0..1] and divide everything by wh
-
-       // estimated average paragraph height:
-       if (d->wh_ == 0)
-               d->wh_ = height_ / 4;
-
-       int h = tm.parMetrics(d->anchor_ref_).height();
-
-       // Normalize anchor/offset (MV):
-       while (d->offset_ref_ > h && d->anchor_ref_ < parsize) {
-               d->anchor_ref_++;
-               d->offset_ref_ -= h;
-               h = tm.parMetrics(d->anchor_ref_).height();
+       size_t const parsize = t.paragraphs().size();
+       if (d->par_height_.size() != parsize) {
+               d->par_height_.clear();
+               // FIXME: We assume a default paragraph height of 2 rows. This
+               // should probably be pondered with the screen width.
+               d->par_height_.resize(parsize, defaultRowHeight() * 2);
        }
+
        // Look at paragraph heights on-screen
-       int sumh = 0;
-       int nh = 0;
-       for (pit_type pit = d->anchor_ref_; pit <= parsize; ++pit) {
-               if (sumh > height_)
-                       break;
-               int const h2 = tm.parMetrics(pit).height();
-               sumh += h2;
-               nh++;
+       pair<pit_type, ParagraphMetrics const *> first = tm.first();
+       pair<pit_type, ParagraphMetrics const *> last = tm.last();
+       for (pit_type pit = first.first; pit <= last.first; ++pit) {
+               d->par_height_[pit] = tm.parMetrics(pit).height();
+               LYXERR(Debug::SCROLLING, "storing height for pit " << pit << " : "
+                       << d->par_height_[pit]);
+       }
+
+       int top_pos = first.second->position() - first.second->ascent();
+       int bottom_pos = last.second->position() + last.second->descent();
+       bool first_visible = first.first == 0 && top_pos >= 0;
+       bool last_visible = last.first + 1 == int(parsize) && bottom_pos <= height_;
+       if (first_visible && last_visible) {
+               d->scrollbarParameters_.min = 0;
+               d->scrollbarParameters_.max = 0;
+               return;
        }
 
-       BOOST_ASSERT(nh);
-       int const hav = sumh / nh;
-       // More realistic average paragraph height
-       if (hav > d->wh_)
-               d->wh_ = hav;
+       d->scrollbarParameters_.min = top_pos;
+       for (size_t i = 0; i != size_t(first.first); ++i)
+               d->scrollbarParameters_.min -= d->par_height_[i];
+       d->scrollbarParameters_.max = bottom_pos;
+       for (size_t i = last.first + 1; i != parsize; ++i)
+               d->scrollbarParameters_.max += d->par_height_[i];
 
-       BOOST_ASSERT(h);
-       d->scrollbarParameters_.height = (parsize + 1) * d->wh_;
-       d->scrollbarParameters_.position = d->anchor_ref_ * d->wh_ + int(d->offset_ref_ * d->wh_ / float(h));
-       d->scrollbarParameters_.lineScrollHeight = int(d->wh_ * defaultRowHeight() / float(h));
+       d->scrollbarParameters_.position = 0;
+       // The reference is the top position so we remove one page.
+       d->scrollbarParameters_.max -= d->scrollbarParameters_.page_step;
 }
 
 
@@ -478,27 +515,79 @@ ScrollbarParameters const & BufferView::scrollbarParameters() const
 }
 
 
+docstring BufferView::toolTip(int x, int y) const
+{
+       // Get inset under mouse, if there is one.
+       Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
+       if (!covering_inset)
+               // No inset, no tooltip...
+               return docstring();
+       return covering_inset->toolTip(*this, x, y);
+}
+
+
+docstring BufferView::contextMenu(int x, int y) const
+{
+       // Get inset under mouse, if there is one.
+       Inset const * covering_inset = getCoveringInset(buffer_.text(), x, y);
+       if (covering_inset)
+               return covering_inset->contextMenu(*this, x, y);
+
+       return buffer_.inset().contextMenu(*this, x, y);
+}
+
+
 void BufferView::scrollDocView(int value)
 {
-       LYXERR(Debug::GUI, "[ value = " << value << "]");
+       int const offset = value - d->scrollbarParameters_.position;
+       // If the offset is less than 2 screen height, prefer to scroll instead.
+       if (abs(offset) <= 2 * height_) {
+               scroll(offset);
+               return;
+       }
 
-       Text & t = buffer_.text();
-       TextMetrics & tm = d->text_metrics_[&t];
+       // cut off at the top
+       if (value <= d->scrollbarParameters_.min) {
+               DocIterator dit = doc_iterator_begin(buffer_.inset());
+               showCursor(dit);
+               LYXERR(Debug::SCROLLING, "scroll to top");
+               return;
+       }
 
-       float const bar = value / float(d->wh_ * t.paragraphs().size());
+       // cut off at the bottom
+       if (value >= d->scrollbarParameters_.max) {
+               DocIterator dit = doc_iterator_end(buffer_.inset());
+               dit.backwardPos();
+               showCursor(dit);
+               LYXERR(Debug::SCROLLING, "scroll to bottom");
+               return;
+       }
 
-       d->anchor_ref_ = int(bar * t.paragraphs().size());
-       if (d->anchor_ref_ >  int(t.paragraphs().size()) - 1)
-               d->anchor_ref_ = int(t.paragraphs().size()) - 1;
+       // find paragraph at target position
+       int par_pos = d->scrollbarParameters_.min;
+       pit_type i = 0;
+       for (; i != int(d->par_height_.size()); ++i) {
+               par_pos += d->par_height_[i];
+               if (par_pos >= value)
+                       break;
+       }
 
-       tm.redoParagraph(d->anchor_ref_);
-       int const h = tm.parMetrics(d->anchor_ref_).height();
-       d->offset_ref_ = int((bar * t.paragraphs().size() - d->anchor_ref_) * h);
-       updateMetrics();
-       buffer_.changed();
+       if (par_pos < 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);
+               return;
+       }
+
+       DocIterator dit = doc_iterator_begin(buffer_.inset());
+       dit.pit() = i;
+       LYXERR(Debug::SCROLLING, "value = " << value << " -> scroll to pit " << i);
+       showCursor(dit);
 }
 
 
+// FIXME: this method is not working well.
 void BufferView::setCursorFromScrollbar()
 {
        TextMetrics & tm = d->text_metrics_[&buffer_.text()];
@@ -581,7 +670,7 @@ bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
        int top_id, pos_type top_pos)
 {
        bool success = false;
-       DocIterator doc_it;
+       DocIterator dit;
 
        d->cursor_.clearSelection();
 
@@ -589,19 +678,19 @@ bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
        // This is the case for a 'live' bookmark when unique paragraph ID
        // is used to track bookmarks.
        if (top_id > 0) {
-               ParIterator par = buffer_.getParFromID(top_id);
-               if (par != buffer_.par_iterator_end()) {
-                       doc_it = makeDocIterator(par, min(par->size(), top_pos));
+               dit = buffer_.getParFromID(top_id);
+               if (!dit.atEnd()) {
+                       dit.pos() = min(dit.paragraph().size(), top_pos);
                        // Some slices of the iterator may not be
                        // reachable (e.g. closed collapsable inset)
                        // so the dociterator may need to be
                        // shortened. Otherwise, setCursor may crash
                        // lyx when the cursor can not be set to these
                        // insets.
-                       size_t const n = doc_it.depth();
+                       size_t const n = dit.depth();
                        for (size_t i = 0; i < n; ++i)
-                               if (doc_it[i].inset().editable() != Inset::HIGHLY_EDITABLE) {
-                                       doc_it.resize(i);
+                               if (dit[i].inset().editable() != Inset::HIGHLY_EDITABLE) {
+                                       dit.resize(i);
                                        break;
                                }
                        success = true;
@@ -614,16 +703,17 @@ bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
        // restoration is inaccurate. If a bookmark was within an inset,
        // it will be restored to the left of the outmost inset that contains
        // the bookmark.
-       if (static_cast<size_t>(bottom_pit) < buffer_.paragraphs().size()) {
-               doc_it = doc_iterator_begin(buffer_.inset());
-               doc_it.pit() = bottom_pit;
-               doc_it.pos() = min(bottom_pos, doc_it.paragraph().size());
+       if (bottom_pit < int(buffer_.paragraphs().size())) {
+               dit = doc_iterator_begin(buffer_.inset());
+                               
+               dit.pit() = bottom_pit;
+               dit.pos() = min(bottom_pos, dit.paragraph().size());
                success = true;
        }
 
        if (success) {
                // Note: only bottom (document) level pit is set.
-               setCursor(doc_it);
+               setCursor(dit);
                // set the current font.
                d->cursor_.setCurrentFont();
                // To center the screen on this new position we need the
@@ -631,8 +721,7 @@ bool BufferView::moveToPosition(pit_type bottom_pit, pos_type bottom_pos,
                // So we need a redraw!
                buffer_.changed();
                if (fitCursor())
-                       // We need another redraw because of the screen recentering.
-                       buffer_.changed();
+                       showCursor();
        }
 
        return success;
@@ -661,31 +750,77 @@ int BufferView::workWidth() const
 }
 
 
-void BufferView::updateOffsetRef()
+void BufferView::showCursor()
 {
-       // No need to update d->offset_ref_ in this case.
-       if (!d->need_centering_)
-               return;
+       showCursor(d->cursor_);
+}
+
 
+void BufferView::showCursor(DocIterator const & dit)
+{
        // We are not properly started yet, delay until resizing is
        // done.
        if (height_ == 0)
                return;
 
-       CursorSlice & bot = d->cursor_.bottom();
+       LYXERR(Debug::SCROLLING, "recentering!");
+
+       CursorSlice const & bot = dit.bottom();
        TextMetrics & tm = d->text_metrics_[bot.text()];
-       ParagraphMetrics const & pm = tm.parMetrics(bot.pit());
-       int y = coordOffset(d->cursor_, d->cursor_.boundary()).y_;
-       d->offset_ref_ = y + pm.ascent() - height_ / 2;
 
-       d->need_centering_ = false;
-}
+       pos_type const max_pit = pos_type(bot.text()->paragraphs().size() - 1);
+       int bot_pit = bot.pit();
+       if (bot_pit > max_pit) {
+               // FIXME: Why does this happen?
+               LYXERR0("bottom pit is greater that max pit: "
+                       << bot_pit << " > " << max_pit);
+               bot_pit = max_pit;
+       }
 
+       if (bot_pit == tm.first().first - 1)
+               tm.newParMetricsUp();
+       else if (bot_pit == tm.last().first + 1)
+               tm.newParMetricsDown();
 
-void BufferView::center()
-{
-       d->anchor_ref_ = d->cursor_.bottom().pit();
-       d->need_centering_ = true;
+       if (tm.contains(bot_pit)) {
+               ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
+               BOOST_ASSERT(!pm.rows().empty());
+               // FIXME: smooth scrolling doesn't work in mathed.
+               CursorSlice const & cs = dit.innerTextSlice();
+               int offset = coordOffset(dit, dit.boundary()).y_;
+               int ypos = pm.position() + offset;
+               Dimension const & row_dim =
+                       pm.getRow(cs.pos(), dit.boundary()).dimension();
+               if (ypos - row_dim.ascent() < 0)
+                       scrollUp(- ypos + row_dim.ascent());
+               else if (ypos + row_dim.descent() > height_)
+                       scrollDown(ypos - height_ + row_dim.descent());
+               // else, nothing to do, the cursor is already visible so we just return.
+               return;
+       }
+
+       // fix inline completion position
+       if (d->inlineCompletionPos.fixIfBroken())
+               d->inlineCompletionPos = DocIterator();
+
+       tm.redoParagraph(bot_pit);
+       ParagraphMetrics const & pm = tm.parMetrics(bot_pit);
+       int offset = coordOffset(dit, dit.boundary()).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)
+               d->anchor_ypos_ = offset + pm.ascent();
+       else if (d->anchor_pit_ == max_pit)
+               d->anchor_ypos_ = height_ - offset - row_dim.descent();
+       else
+               d->anchor_ypos_ = defaultRowHeight() * 2 - offset - row_dim.descent();
+
+       updateMetrics();
+       buffer_.changed();
 }
 
 
@@ -713,6 +848,8 @@ FuncStatus BufferView::getStatus(FuncRequest const & cmd)
        case LFUN_FONT_STATE:
        case LFUN_LABEL_INSERT:
        case LFUN_INFO_INSERT:
+       case LFUN_EXTERNAL_EDIT:
+       case LFUN_GRAPHICS_EDIT:
        case LFUN_PARAGRAPH_GOTO:
        case LFUN_NOTE_NEXT:
        case LFUN_REFERENCE_NEXT:
@@ -724,11 +861,52 @@ FuncStatus BufferView::getStatus(FuncRequest const & cmd)
        case LFUN_SCREEN_RECENTER:
        case LFUN_BIBTEX_DATABASE_ADD:
        case LFUN_BIBTEX_DATABASE_DEL:
-       case LFUN_WORDS_COUNT:
-       case LFUN_NEXT_INSET_TOGGLE:
+       case LFUN_STATISTICS:
                flag.enabled(true);
                break;
 
+       case LFUN_NEXT_INSET_TOGGLE: {
+               // this is the real function we want to invoke
+               FuncRequest tmpcmd = FuncRequest(LFUN_INSET_TOGGLE, cmd.argument());
+               // if there is an inset at cursor, see whether it
+               // can be modified.
+               Inset * inset = cur.nextInset();
+               if (inset) {
+                       inset->getStatus(cur, tmpcmd, flag);
+                       return flag;
+                       break;
+               }
+               // if it did not work, try the underlying inset.
+               if (!inset || !cur.result().dispatched())
+                       getStatus(tmpcmd);
+
+               if (!cur.result().dispatched())
+                       // else disable
+                       flag.enabled(false);
+               break;
+       }
+
+       case LFUN_NEXT_INSET_MODIFY: {
+               // this is the real function we want to invoke
+               FuncRequest tmpcmd = FuncRequest(LFUN_INSET_MODIFY, cmd.argument());
+               // if there is an inset at cursor, see whether it
+               // can be modified.
+               Inset * inset = cur.nextInset();
+               if (inset) {
+                       inset->getStatus(cur, tmpcmd, flag);
+                       return flag;
+                       break;
+               }
+               // if it did not work, try the underlying inset.
+               if (!inset || !cur.result().dispatched())
+                       getStatus(tmpcmd);
+
+               if (!cur.result().dispatched())
+                       // else disable
+                       flag.enabled(false);
+               break;
+       }
+
        case LFUN_LABEL_GOTO: {
                flag.enabled(!cmd.argument().empty()
                    || getInsetByCode<InsetRef>(cur, REF_CODE));
@@ -768,14 +946,10 @@ FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 
        case LFUN_SCREEN_UP:
        case LFUN_SCREEN_DOWN:
-               flag.enabled(true);
-               break;
-
-       // FIXME: LFUN_SCREEN_DOWN_SELECT should be removed from
-       // everywhere else before this can enabled:
+       case LFUN_SCROLL:
        case LFUN_SCREEN_UP_SELECT:
        case LFUN_SCREEN_DOWN_SELECT:
-               flag.enabled(false);
+               flag.enabled(true);
                break;
 
        case LFUN_LAYOUT_TABULAR:
@@ -783,37 +957,29 @@ FuncStatus BufferView::getStatus(FuncRequest const & cmd)
                break;
 
        case LFUN_LAYOUT:
+               flag.enabled(!cur.inset().forceEmptyLayout(cur.idx()));
+               break;
+
        case LFUN_LAYOUT_PARAGRAPH:
-               flag.enabled(cur.inset().forceDefaultParagraphs(cur.idx()));
+               flag.enabled(cur.inset().allowParagraphCustomization(cur.idx()));
                break;
 
        case LFUN_INSET_SETTINGS: {
                InsetCode code = cur.inset().lyxCode();
+               if (cur.nextInset())
+                       code = cur.nextInset()->lyxCode();
                bool enable = false;
                switch (code) {
                        case TABULAR_CODE:
-                               enable = cmd.argument() == "tabular";
-                               break;
                        case ERT_CODE:
-                               enable = cmd.argument() == "ert";
-                               break;
                        case FLOAT_CODE:
-                               enable = cmd.argument() == "float";
-                               break;
                        case WRAP_CODE:
-                               enable = cmd.argument() == "wrap";
-                               break;
                        case NOTE_CODE:
-                               enable = cmd.argument() == "note";
-                               break;
                        case BRANCH_CODE:
-                               enable = cmd.argument() == "branch";
-                               break;
                        case BOX_CODE:
-                               enable = cmd.argument() == "box";
-                               break;
                        case LISTINGS_CODE:
-                               enable = cmd.argument() == "listings";
+                               enable = (cmd.argument().empty() ||
+                                         cmd.getArg(0) == insetName(code));
                                break;
                        default:
                                break;
@@ -840,7 +1006,7 @@ FuncStatus BufferView::getStatus(FuncRequest const & cmd)
 }
 
 
-Update::flags BufferView::dispatch(FuncRequest const & cmd)
+bool BufferView::dispatch(FuncRequest const & cmd)
 {
        //lyxerr << [ cmd = " << cmd << "]" << endl;
 
@@ -852,27 +1018,25 @@ Update::flags BufferView::dispatch(FuncRequest const & cmd)
                << " button[" << cmd.button() << ']');
 
        Cursor & cur = d->cursor_;
-       // Default Update flags.
-       Update::flags updateFlags = Update::Force | Update::FitCursor;
 
        switch (cmd.action) {
 
        case LFUN_UNDO:
                cur.message(_("Undo"));
                cur.clearSelection();
-               if (!cur.textUndo()) {
+               if (!cur.textUndo())
                        cur.message(_("No further undo information"));
-                       updateFlags = Update::None;
-               }
+               else
+                       processUpdateFlags(Update::Force | Update::FitCursor);
                break;
 
        case LFUN_REDO:
                cur.message(_("Redo"));
                cur.clearSelection();
-               if (!cur.textRedo()) {
+               if (!cur.textRedo())
                        cur.message(_("No further redo information"));
-                       updateFlags = Update::None;
-               }
+               else
+                       processUpdateFlags(Update::Force | Update::FitCursor);
                break;
 
        case LFUN_FONT_STATE:
@@ -900,6 +1064,25 @@ Update::flags BufferView::dispatch(FuncRequest const & cmd)
                        gotoLabel(label);
                break;
        }
+       
+       case LFUN_EXTERNAL_EDIT: {
+               FuncRequest fr(cmd);
+               InsetExternal * inset = getInsetByCode<InsetExternal>(d->cursor_,
+                       EXTERNAL_CODE);
+               if (inset)
+                       inset->dispatch(d->cursor_, fr);
+               break;
+       }
+
+
+       case LFUN_GRAPHICS_EDIT: {
+               FuncRequest fr(cmd);
+               InsetGraphics * inset = getInsetByCode<InsetGraphics>(d->cursor_,
+                       GRAPHICS_CODE);
+               if (inset)
+                       inset->dispatch(d->cursor_, fr);
+               break;
+       }
 
        case LFUN_PARAGRAPH_GOTO: {
                int const id = convert<int>(to_utf8(cmd.argument()));
@@ -907,27 +1090,27 @@ Update::flags BufferView::dispatch(FuncRequest const & cmd)
                for (Buffer * b = &buffer_; i == 0 || b != &buffer_;
                        b = theBufferList().next(b)) {
 
-                       ParIterator par = b->getParFromID(id);
-                       if (par == b->par_iterator_end()) {
+                       DocIterator dit = b->getParFromID(id);
+                       if (dit.atEnd()) {
                                LYXERR(Debug::INFO, "No matching paragraph found! [" << id << "].");
+                               ++i;
+                               continue;
+                       }
+                       LYXERR(Debug::INFO, "Paragraph " << dit.paragraph().id()
+                               << " found in buffer `"
+                               << b->absFileName() << "'.");
+
+                       if (b == &buffer_) {
+                               // Set the cursor
+                               setCursor(dit);
+                               processUpdateFlags(Update::Force | Update::FitCursor);
                        } else {
-                               LYXERR(Debug::INFO, "Paragraph " << par->id()
-                                       << " found in buffer `"
-                                       << b->absFileName() << "'.");
-
-                               if (b == &buffer_) {
-                                       // Set the cursor
-                                       setCursor(makeDocIterator(par, 0));
-                               } else {
-                                       // Switch to other buffer view and resend cmd
-                                       theLyXFunc().dispatch(FuncRequest(
-                                               LFUN_BUFFER_SWITCH, b->absFileName()));
-                                       theLyXFunc().dispatch(cmd);
-                                       updateFlags = Update::None;
-                               }
-                               break;
+                               // Switch to other buffer view and resend cmd
+                               theLyXFunc().dispatch(FuncRequest(
+                                       LFUN_BUFFER_SWITCH, b->absFileName()));
+                               theLyXFunc().dispatch(cmd);
                        }
-                       ++i;
+                       break;
                }
                break;
        }
@@ -1000,7 +1183,10 @@ Update::flags BufferView::dispatch(FuncRequest const & cmd)
                break;
 
        case LFUN_WORD_FIND:
-               find(this, cmd);
+               if (find(this, cmd))
+                       showCursor();
+               else
+                       message(_("String not found!"));
                break;
 
        case LFUN_WORD_REPLACE: {
@@ -1045,7 +1231,7 @@ Update::flags BufferView::dispatch(FuncRequest const & cmd)
                break;
 
        case LFUN_SCREEN_RECENTER:
-               center();
+               showCursor();
                break;
 
        case LFUN_BIBTEX_DATABASE_ADD: {
@@ -1072,7 +1258,7 @@ Update::flags BufferView::dispatch(FuncRequest const & cmd)
                break;
        }
 
-       case LFUN_WORDS_COUNT: {
+       case LFUN_STATISTICS: {
                DocIterator from, to;
                if (cur.selection()) {
                        from = cur.selectionBegin();
@@ -1081,24 +1267,33 @@ Update::flags BufferView::dispatch(FuncRequest const & cmd)
                        from = doc_iterator_begin(buffer_.inset());
                        to = doc_iterator_end(buffer_.inset());
                }
-               int const count = countWords(from, to);
+               int const words = countWords(from, to);
+               int const chars = countChars(from, to, false);
+               int const chars_blanks = countChars(from, to, true);
                docstring message;
-               if (count != 1) {
-                       if (cur.selection())
-                               message = bformat(_("%1$d words in selection."),
-                                         count);
-                               else
-                                       message = bformat(_("%1$d words in document."),
-                                                         count);
-               }
-               else {
-                       if (cur.selection())
-                               message = _("One word in selection.");
-                       else
-                               message = _("One word in document.");
-               }
-
-               Alert::information(_("Count words"), message);
+               if (cur.selection())
+                       message = _("Statistics for the selection:");
+               else
+                       message = _("Statistics for the document:");
+               message += "\n\n";
+               if (words != 1)
+                       message += bformat(_("%1$d words"), words);
+               else
+                       message += _("One word");
+               message += "\n";
+               if (chars_blanks != 1)
+                       message += bformat(_("%1$d characters (including blanks)"),
+                                         chars_blanks);
+               else
+                       message += _("One character (including blanks)");
+               message += "\n";
+               if (chars != 1)
+                       message += bformat(_("%1$d characters (excluding blanks)"),
+                                         chars);
+               else
+                       message += _("One character (excluding blanks)");
+
+               Alert::information(_("Statistics"), message);
        }
                break;
 
@@ -1107,10 +1302,15 @@ Update::flags BufferView::dispatch(FuncRequest const & cmd)
                buffer_.params().compressed = !buffer_.params().compressed;
                break;
        
-       case LFUN_BUFFER_TOGGLE_EMBEDDING:
+       case LFUN_BUFFER_TOGGLE_EMBEDDING: {
                // turn embedding on/off
-               buffer_.embeddedFiles().enable(!buffer_.params().embedded);
+               try {
+                       buffer_.embeddedFiles().enable(!buffer_.params().embedded, buffer_, true);
+               } catch (ExceptionMessage const & message) {
+                       Alert::error(message.title_, message.details_);
+               }
                break;
+       }
 
        case LFUN_NEXT_INSET_TOGGLE: {
                // this is the real function we want to invoke
@@ -1131,12 +1331,34 @@ Update::flags BufferView::dispatch(FuncRequest const & cmd)
                        }
                }
                // if it did not work, try the underlying inset.
-               if (!cur.result().dispatched())
+               if (!inset || !cur.result().dispatched())
                        cur.dispatch(tmpcmd);
 
-               if (cur.result().dispatched())
-                       cur.clearSelection();
+               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: {
+               // this is the real function we want to invoke
+               FuncRequest tmpcmd = FuncRequest(LFUN_INSET_MODIFY, cmd.argument());
+               // 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;
        }
 
@@ -1145,13 +1367,7 @@ Update::flags BufferView::dispatch(FuncRequest const & cmd)
                Point p = getPos(cur, cur.boundary());
                if (p.y_ < 0 || p.y_ > height_) {
                        // The cursor is off-screen so recenter before proceeding.
-                       center();
-                       updateMetrics();
-                       //FIXME: updateMetrics() does not update paragraph position
-                       // This is done at draw() time. So we need a redraw!
-                       // But no screen update is needed.
-                       d->update_strategy_ = NoScreenUpdate;
-                       buffer_.changed();
+                       showCursor();
                        p = getPos(cur, cur.boundary());
                }
                scroll(cmd.action == LFUN_SCREEN_UP? - height_ : height_);
@@ -1159,37 +1375,52 @@ Update::flags BufferView::dispatch(FuncRequest const & cmd)
                d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_);
                //FIXME: what to do with cur.x_target()?
                cur.finishUndo();
-               // The metrics are already up to date. see scroll()
-               updateFlags = Update::None;
                break;
        }
 
-       case LFUN_SCREEN_UP_SELECT:
-       case LFUN_SCREEN_DOWN_SELECT: {
+       case LFUN_SCROLL:
+               lfunScroll(cmd);
+               break;
+
+       case LFUN_SCREEN_UP_SELECT: {
                cur.selHandle(true);
-               size_t initial_depth = cur.depth();
-               Point const p = getPos(cur, cur.boundary());
-               scroll(cmd.action == LFUN_SCREEN_UP_SELECT? - height_ : height_);
-               // FIXME: We need to verify if the cursor stayed within an inset...
-               //cur.reset(buffer_.inset());
-               d->text_metrics_[&buffer_.text()].editXY(cur, p.x_, p.y_);
+               if (isTopScreen()) {
+                       lyx::dispatch(FuncRequest(LFUN_BUFFER_BEGIN_SELECT));
+                       cur.finishUndo();
+                       break;
+               }
+               int y = getPos(cur, cur.boundary()).y_;
+               int const ymin = y - height_ + defaultRowHeight();
+               while (y > ymin && cur.up())
+                       y = getPos(cur, cur.boundary()).y_;
+
                cur.finishUndo();
-               while (cur.depth() > initial_depth) {
-                       cur.forwardInset();
+               processUpdateFlags(Update::SinglePar | Update::FitCursor);
+               break;
+       }
+
+       case LFUN_SCREEN_DOWN_SELECT: {
+               cur.selHandle(true);
+               if (isBottomScreen()) {
+                       lyx::dispatch(FuncRequest(LFUN_BUFFER_END_SELECT));
+                       cur.finishUndo();
+                       break;
                }
-               // FIXME: we need to do a redraw again because of the selection
-               // But no screen update is needed.
-               d->update_strategy_ = NoScreenUpdate;
-               buffer_.changed();
-               updateFlags = Update::Force | Update::FitCursor;
+               int y = getPos(cur, cur.boundary()).y_;
+               int const ymax = y + height_ - defaultRowHeight();
+               while (y < ymax && cur.down())
+                       y = getPos(cur, cur.boundary()).y_;
+
+               cur.finishUndo();
+               processUpdateFlags(Update::SinglePar | Update::FitCursor);
                break;
        }
 
        default:
-               updateFlags = Update::None;
+               return false;
        }
 
-       return updateFlags;
+       return true;
 }
 
 
@@ -1235,11 +1466,15 @@ void BufferView::resize(int width, int height)
        width_ = width;
        height_ = height;
 
+       // Clear the paragraph height cache.
+       d->par_height_.clear();
+       // Redo the metrics.
        updateMetrics();
 }
 
 
-Inset const * BufferView::getCoveringInset(Text const & text, int x, int y)
+Inset const * BufferView::getCoveringInset(Text const & text,
+               int x, int y) const
 {
        TextMetrics & tm = d->text_metrics_[&text];
        Inset * inset = tm.checkInsetHit(x, y);
@@ -1276,6 +1511,7 @@ void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
        // LFUN_FILE_OPEN generated by drag-and-drop.
        FuncRequest cmd = cmd0;
 
+       Cursor old = cursor();
        Cursor cur(*this);
        cur.push(buffer_.inset());
        cur.selection() = d->cursor_.selection();
@@ -1334,20 +1570,47 @@ void BufferView::mouseEventDispatch(FuncRequest const & cmd0)
 
        // Now dispatch to the temporary cursor. If the real cursor should
        // be modified, the inset's dispatch has to do so explicitly.
-       if (!cur.result().dispatched())
+       if (!inset || !cur.result().dispatched())
                cur.dispatch(cmd);
 
-       //Do we have a selection?
+       // Notify left insets
+       if (cur != old) {
+               old.fixIfBroken();
+               bool badcursor = notifyCursorLeaves(old, cur);
+               if (badcursor)
+                       cursor().fixIfBroken();
+       }
+       
+       // Do we have a selection?
        theSelection().haveSelection(cursor().selection());
 
        // If the command has been dispatched,
-       if (cur.result().dispatched()
-               // an update is asked,
-               && cur.result().update())
+       if (cur.result().dispatched() || cur.result().update())
                processUpdateFlags(cur.result().update());
 }
 
 
+void BufferView::lfunScroll(FuncRequest const & cmd)
+{
+       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);
+       }
+}
+
+
 void BufferView::scroll(int y)
 {
        if (y > 0)
@@ -1363,7 +1626,7 @@ void BufferView::scrollDown(int offset)
        TextMetrics & tm = d->text_metrics_[text];
        int ymax = height_ + offset;
        while (true) {
-               std::pair<pit_type, ParagraphMetrics const *> last = tm.last();
+               pair<pit_type, ParagraphMetrics const *> last = tm.last();
                int bottom_pos = last.second->position() + last.second->descent();
                if (last.first + 1 == int(text->paragraphs().size())) {
                        if (bottom_pos <= height_)
@@ -1375,7 +1638,7 @@ void BufferView::scrollDown(int offset)
                        break;
                tm.newParMetricsDown();
        }
-       d->offset_ref_ += offset;
+       d->anchor_ypos_ -= offset;
        updateMetrics();
        buffer_.changed();
 }
@@ -1387,7 +1650,7 @@ void BufferView::scrollUp(int offset)
        TextMetrics & tm = d->text_metrics_[text];
        int ymin = - offset;
        while (true) {
-               std::pair<pit_type, ParagraphMetrics const *> first = tm.first();
+               pair<pit_type, ParagraphMetrics const *> first = tm.first();
                int top_pos = first.second->position() - first.second->ascent();
                if (first.first == 0) {
                        if (top_pos >= 0)
@@ -1399,7 +1662,7 @@ void BufferView::scrollUp(int offset)
                        break;
                tm.newParMetricsUp();
        }
-       d->offset_ref_ -= offset;
+       d->anchor_ypos_ += offset;
        updateMetrics();
        buffer_.changed();
 }
@@ -1422,15 +1685,15 @@ void BufferView::setCursorFromRow(int row)
 
 void BufferView::gotoLabel(docstring const & label)
 {
-       for (InsetIterator it = inset_iterator_begin(buffer_.inset()); it; ++it) {
-               vector<docstring> labels;
-               it->getLabelList(buffer_, labels);
-               if (std::find(labels.begin(), labels.end(), label) != labels.end()) {
-                       setCursor(it);
-                       processUpdateFlags(Update::FitCursor);
-                       return;
-               }
+       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());
        }
+       //FIXME: We could do a bit more searching thanks to this:
+       //InsetLabel const * inset = buffer_.insetLabel(label);
 }
 
 
@@ -1491,6 +1754,8 @@ bool BufferView::checkDepm(Cursor & cur, Cursor & old)
        if (!changed)
                return false;
 
+       d->cursor_ = cur;
+
        updateLabels(buffer_);
 
        updateMetrics();
@@ -1511,8 +1776,12 @@ bool BufferView::mouseSetCursor(Cursor & cur, bool select)
        // Has the cursor just left the inset?
        bool badcursor = false;
        bool leftinset = (&d->cursor_.inset() != &cur.inset());
-       if (leftinset)
+       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();
@@ -1525,24 +1794,7 @@ bool BufferView::mouseSetCursor(Cursor & cur, bool select)
        if (!do_selection && !badcursor && d->cursor_.inTexted())
                update |= checkDepm(cur, d->cursor_);
 
-       // if the cursor was in an empty script inset and the new
-       // position is in the nucleus of the inset, notifyCursorLeaves
-       // will kill the script inset itself. So we check all the
-       // elements of the cursor to make sure that they are correct.
-       // For an example, see bug 2933:
-       // http://bugzilla.lyx.org/show_bug.cgi?id=2933
-       // The code below could maybe be moved to a DocIterator method.
-       //lyxerr << "cur before " << cur <<std::endl;
-       DocIterator dit(cur.inset());
-       dit.push_back(cur.bottom());
-       size_t i = 1;
-       while (i < cur.depth() && dit.nextInset() == &cur[i].inset()) {
-               dit.push_back(cur[i]);
-               ++i;
-       }
-       //lyxerr << "5 cur after" << dit <<std::endl;
-
-       d->cursor_.setCursor(dit);
+       d->cursor_.setCursor(cur);
        d->cursor_.boundary(cur.boundary());
        if (do_selection)
                d->cursor_.setSelection();
@@ -1569,6 +1821,9 @@ 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);
 }
 
 
@@ -1586,7 +1841,7 @@ Cursor const & BufferView::cursor() const
 
 pit_type BufferView::anchor_ref() const
 {
-       return d->anchor_ref_;
+       return d->anchor_pit_;
 }
 
 
@@ -1597,6 +1852,10 @@ bool BufferView::singleParUpdate()
        TextMetrics & tm = textMetrics(&buftext);
        int old_height = tm.parMetrics(bottom_pit).height();
 
+       // make sure inline completion pointer is ok
+       if (d->inlineCompletionPos.fixIfBroken())
+               d->inlineCompletionPos = DocIterator();
+
        // In Single Paragraph mode, rebreak only
        // the (main text, not inset!) paragraph containing the cursor.
        // (if this paragraph contains insets etc., rebreaking will
@@ -1623,11 +1882,6 @@ void BufferView::updateMetrics()
        Text & buftext = buffer_.text();
        pit_type const npit = int(buftext.paragraphs().size());
 
-       if (d->anchor_ref_ > int(npit - 1)) {
-               d->anchor_ref_ = int(npit - 1);
-               d->offset_ref_ = 0;
-       }
-
        // Clear out the position cache in case of full screen redraw,
        d->coord_cache_.clear();
 
@@ -1638,59 +1892,69 @@ void BufferView::updateMetrics()
 
        TextMetrics & tm = textMetrics(&buftext);
 
-       pit_type const pit = d->anchor_ref_;
-       int pit1 = pit;
-       int pit2 = pit;
+       // 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;
 
        // Rebreak anchor paragraph.
-       tm.redoParagraph(pit);
-
-       // Take care of anchor offset if case a recentering is needed.
-       updateOffsetRef();
+       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_);
 
-       int y0 = tm.parMetrics(pit).ascent() - d->offset_ref_;
+       LYXERR(Debug::PAINTING, "metrics: "
+               << " anchor pit = " << d->anchor_pit_
+               << " anchor ypos = " << d->anchor_ypos_);
 
        // Redo paragraphs above anchor if necessary.
-       int y1 = y0;
-       while (y1 > 0 && pit1 > 0) {
-               y1 -= tm.parMetrics(pit1).ascent();
-               --pit1;
+       int y1 = d->anchor_ypos_ - anchor_pm.ascent();
+       // We are now just above the anchor paragraph.
+       pit_type pit1 = d->anchor_pit_ - 1;
+       for (; pit1 >= 0 && y1 >= 0; --pit1) {
                tm.redoParagraph(pit1);
-               y1 -= tm.parMetrics(pit1).descent();
-       }
-
-       // Take care of ascent of first line
-       y1 -= tm.parMetrics(pit1).ascent();
-
-       // Normalize anchor for next time
-       d->anchor_ref_ = pit1;
-       d->offset_ref_ = -y1;
-
-       // Grey at the beginning is ugly
-       if (pit1 == 0 && y1 > 0) {
-               y0 -= y1;
-               y1 = 0;
-               d->anchor_ref_ = 0;
+               ParagraphMetrics & pm = tm.par_metrics_[pit1];
+               y1 -= pm.descent();
+               // Save the paragraph position in the cache.
+               pm.setPosition(y1);
+               y1 -= pm.ascent();
        }
 
        // Redo paragraphs below the anchor if necessary.
-       int y2 = y0;
-       while (y2 < height_ && pit2 < int(npit) - 1) {
-               y2 += tm.parMetrics(pit2).descent();
-               ++pit2;
+       int y2 = d->anchor_ypos_ + anchor_pm.descent();
+       // We are now just below the anchor paragraph.
+       pit_type pit2 = d->anchor_pit_ + 1;
+       for (; pit2 < npit && y2 <= height_; ++pit2) {
                tm.redoParagraph(pit2);
-               y2 += tm.parMetrics(pit2).ascent();
+               ParagraphMetrics & pm = tm.par_metrics_[pit2];
+               y2 += pm.ascent();
+               // Save the paragraph position in the cache.
+               pm.setPosition(y2);
+               y2 += pm.descent();
        }
 
-       // Take care of descent of last line
-       y2 += tm.parMetrics(pit2).descent();
-
-       LYXERR(Debug::PAINTING, "\n y1: " << y1
-               << " y2: " << y2
-               << " pit1: " << pit1
-               << " pit2: " << pit2
-               << " npit: " << npit
-               << " singlepar: 0");
+       LYXERR(Debug::PAINTING, "Metrics: "
+               << " anchor pit = " << d->anchor_pit_
+               << " anchor ypos = " << d->anchor_ypos_
+               << " y1 = " << y1
+               << " y2 = " << y2
+               << " pit1 = " << pit1
+               << " pit2 = " << pit2);
 
        d->update_strategy_ = FullScreenUpdate;
 
@@ -1721,7 +1985,7 @@ void BufferView::insertLyXFile(FileName const & fname)
                el = buf.errorList("Parse");
                buffer_.undo().recordUndo(d->cursor_);
                cap::pasteParagraphList(d->cursor_, buf.paragraphs(),
-                                            buf.params().getTextClassPtr(), el);
+                                            buf.params().documentClassPtr(), el);
                res = _("Document %1$s inserted.");
        } else {
                res = _("Could not insert document %1$s");
@@ -1797,7 +2061,7 @@ Point BufferView::coordOffset(DocIterator const & dit, bool boundary) const
                int pos = sl.pos();
                if (pos && boundary)
                        --pos;
-//             lyxerr << "coordOffset: boundary:" << boundary << " depth:" << dit.depth() << " pos:" << pos << " sl.pos:" << sl.pos() << std::endl;
+//             lyxerr << "coordOffset: boundary:" << boundary << " depth:" << dit.depth() << " pos:" << pos << " sl.pos:" << sl.pos() << endl;
                rend = pm.pos2row(pos);
        } else
                rend = pm.pos2row(sl.pos());
@@ -1829,7 +2093,7 @@ Point BufferView::getPos(DocIterator const & dit, bool boundary) const
 {
        CursorSlice const & bot = dit.bottom();
        TextMetrics const & tm = textMetrics(bot.text());
-       if (!tm.has(bot.pit()))
+       if (!tm.contains(bot.pit()))
                return Point(-1, -1);
 
        Point p = coordOffset(dit, boundary); // offset from outer paragraph
@@ -1843,7 +2107,7 @@ void BufferView::draw(frontend::Painter & pain)
        LYXERR(Debug::PAINTING, "\t\t*** START DRAWING ***");
        Text & text = buffer_.text();
        TextMetrics const & tm = d->text_metrics_[&text];
-       int const y = - d->offset_ref_ + tm.parMetrics(d->anchor_ref_).ascent();
+       int const y = tm.first().second->position();
        PainterInfo pi(this, pain);
 
        switch (d->update_strategy_) {
@@ -1876,17 +2140,35 @@ void BufferView::draw(frontend::Painter & pain)
                // Clear background.
                pain.fillRectangle(0, 0, width_, height_,
                        buffer_.inset().backgroundColor());
+
+               // Draw everything.
                tm.draw(pi, 0, y);
 
                // and possibly grey out below
-               std::pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
+               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);
                break;
        }
-
        LYXERR(Debug::PAINTING, "\n\t\t*** END DRAWING  ***");
+
+       // The scrollbar needs an update.
+       updateScrollbar();
+
+       // Normalize anchor for next time
+       pair<pit_type, ParagraphMetrics const *> firstpm = tm.first();
+       pair<pit_type, ParagraphMetrics const *> lastpm = tm.last();
+       for (pit_type pit = firstpm.first; pit <= lastpm.first; ++pit) {
+               ParagraphMetrics const & pm = tm.parMetrics(pit);
+               if (pm.position() + pm.descent() > 0) {
+                       d->anchor_pit_ = pit;
+                       d->anchor_ypos_ = pm.position();
+                       break;
+               }
+       }
+       LYXERR(Debug::PAINTING, "Found new anchor pit = " << d->anchor_pit_
+               << "  anchor ypos = " << d->anchor_ypos_);
 }
 
 
@@ -1897,22 +2179,22 @@ void BufferView::message(docstring const & msg)
 }
 
 
-void BufferView::showDialog(std::string const & name)
+void BufferView::showDialog(string const & name)
 {
        if (d->gui_)
                d->gui_->showDialog(name, string());
 }
 
 
-void BufferView::showDialog(std::string const & name,
-       std::string const & data, Inset * inset)
+void BufferView::showDialog(string const & name,
+       string const & data, Inset * inset)
 {
        if (d->gui_)
                d->gui_->showDialog(name, data, inset);
 }
 
 
-void BufferView::updateDialog(std::string const & name, std::string const & data)
+void BufferView::updateDialog(string const & name, string const & data)
 {
        if (d->gui_)
                d->gui_->updateDialog(name, data);
@@ -1981,4 +2263,67 @@ void BufferView::insertPlaintextFile(FileName const & f, bool asParagraph)
        buffer_.changed();
 }
 
+
+docstring const & BufferView::inlineCompletion() const
+{
+       return d->inlineCompletion;
+}
+
+
+size_t const & BufferView::inlineCompletionUniqueChars() const
+{
+       return d->inlineCompletionUniqueChars;
+}
+
+
+DocIterator const & BufferView::inlineCompletionPos() const
+{
+       return d->inlineCompletionPos;
+}
+
+
+bool samePar(DocIterator const & a, DocIterator const & b)
+{
+       if (a.empty() && b.empty())
+               return true;
+       if (a.empty() || b.empty())
+               return false;
+       return &a.innerParagraph() == &b.innerParagraph();
+}
+
+
+void BufferView::setInlineCompletion(Cursor & cur, DocIterator const & pos, 
+       docstring const & completion, size_t uniqueChars)
+{
+       uniqueChars = min(completion.size(), uniqueChars);
+       bool changed = d->inlineCompletion != completion
+               || d->inlineCompletionUniqueChars != uniqueChars;
+       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) {
+               //lyxerr << "inlineCompletionPos changed" << std::endl;
+               // old or pos are in another paragraph?
+               if ((!samePar(cur, pos) && !pos.empty())
+                   || (!samePar(cur, old) && !old.empty())) {
+                       singlePar = false;
+                       //lyxerr << "different paragraph" << std::endl;
+               }
+               d->inlineCompletionPos = pos;
+       }
+       
+       // set update flags
+       if (changed) {
+               if (singlePar && !(cur.disp_.update() & Update::Force))
+                       cur.updateFlags(cur.disp_.update() | Update::SinglePar);
+               else
+                       cur.updateFlags(cur.disp_.update() | Update::Force);
+       }
+}
+
 } // namespace lyx