Attempt to fix #8137 (arrived at r40862).

[lyx.git] / src / Undo.cpp

diff --git a/src/Undo.cpp b/src/Undo.cpp
index 7928c390966434ce9b6d3f0454f9de26dd749555..28438c10f39711b0caa2cbcd6441a3bd6f1d6a5f 100644 (file)
--- a/src/Undo.cpp
+++ b/src/Undo.cpp
@@ -65,12 +65,12 @@ where to insert the stored bits when performining undo.
 struct UndoElement
 {
        ///
-       UndoElement(UndoKind kin, StableDocIterator const & cur, 
+       UndoElement(UndoKind kin, StableDocIterator const & cb, 
                    StableDocIterator const & cel,
                    pit_type fro, pit_type en, ParagraphList * pl, 
                    MathData * ar, BufferParams const & bp, 
                    bool ifb, bool lc, size_t gid) :
-               kind(kin), cursor(cur), cell(cel), from(fro), end(en),
+               kind(kin), cur_before(cb), cell(cel), from(fro), end(en),
                pars(pl), array(ar), bparams(0), isFullBuffer(ifb),
                lyx_clean(lc), group_id(gid)
        {
@@ -81,7 +81,8 @@ struct UndoElement
        UndoElement(UndoElement const & ue)
        {
                kind = ue.kind;
-               cursor = ue.cursor;
+               cur_before = ue.cur_before;
+               cur_after = ue.cur_after;
                cell = ue.cell;
                from = ue.from;
                end = ue.end;
@@ -101,8 +102,10 @@ struct UndoElement
        }
        /// Which kind of operation are we recording for?
        UndoKind kind;
-       /// the position of the cursor
-       StableDocIterator cursor;
+       /// the position of the cursor before recordUndo
+       StableDocIterator cur_before;
+       /// the position of the cursor at the end of the undo group
+       StableDocIterator cur_after;
        /// the position of the cell described
        StableDocIterator cell;
        /// counted from begin of cell
@@ -195,7 +198,7 @@ struct Undo::Private
                DocIterator const & cell,
                pit_type first_pit,
                pit_type last_pit,
-               DocIterator const & cur,
+               StableDocIterator const & cur,
                bool isFullBuffer,
                UndoElementStack & stack);
        ///
@@ -288,7 +291,7 @@ static bool samePar(StableDocIterator const & i1, StableDocIterator const & i2)
 void Undo::Private::doRecordUndo(UndoKind kind,
        DocIterator const & cell,
        pit_type first_pit, pit_type last_pit,
-       DocIterator const & cur,
+       StableDocIterator const & cur_before,
        bool isFullBuffer,
        UndoElementStack & stack)
 {
@@ -311,15 +314,18 @@ void Undo::Private::doRecordUndo(UndoKind kind,
            && samePar(stack.top().cell, cell)
            && stack.top().kind == kind
            && stack.top().from == from
-           && stack.top().end == end)
+           && stack.top().end == end) {
+               // reset cur_after; it will be filled correctly by endUndoGroup.
+               stack.top().cur_after = StableDocIterator();
                return;
+       }
 
        if (isFullBuffer)
                LYXERR(Debug::UNDO, "Create full buffer undo element of group " << group_id);
        else
                LYXERR(Debug::UNDO, "Create undo element of group " << group_id);
        // create the position information of the Undo entry
-       UndoElement undo(kind, cur, cell, from, end, 0, 0, 
+       UndoElement undo(kind, cur_before, cell, from, end, 0, 0, 
                         buffer_.params(), isFullBuffer, buffer_.isClean(), group_id);
 
        // fill in the real data to be saved
@@ -384,8 +390,9 @@ void Undo::Private::doTextUndoOrRedo(DocIterator & cur, UndoElementStack & stack
        DocIterator cell_dit = undo.cell.asDocIterator(&buffer_);
 
        doRecordUndo(ATOMIC_UNDO, cell_dit,
-               undo.from, cell_dit.lastpit() - undo.end, cur,
+               undo.from, cell_dit.lastpit() - undo.end, undo.cur_after,
                undo.isFullBuffer, otherstack);
+       otherstack.top().cur_after = undo.cur_before;
 
        // This does the actual undo/redo.
        //LYXERR0("undo, performing: " << undo);
@@ -439,7 +446,8 @@ void Undo::Private::doTextUndoOrRedo(DocIterator & cur, UndoElementStack & stack
        LASSERT(undo.pars == 0, /**/);
        LASSERT(undo.array == 0, /**/);
 
-       cur = undo.cursor.asDocIterator(&buffer_);
+       if (undo.cur_before.size())
+               cur = undo.cur_before.asDocIterator(&buffer_);
        if (undo.lyx_clean)
                buffer_.markClean();
        else
@@ -512,6 +520,15 @@ void Undo::endUndoGroup()
        }
 }
 
+
+void Undo::endUndoGroup(DocIterator const & cur)
+{
+       endUndoGroup();
+       if (!d->undostack_.empty() && !d->undostack_.top().cur_after.size())
+               d->undostack_.top().cur_after = cur;
+}
+
+
 // FIXME: remove these convenience functions and make
 // Private::recordUndo public as sole interface. The code in the
 // convenience functions can move to Cursor.cpp.