Hack to display section symbol

[lyx.git] / src / Undo.h

diff --git a/src/Undo.h b/src/Undo.h
index 95514ab0b259a1e5685a1cbe4362301b7cff4bc4..fbfb9e7dbbb3dc40ef3ca1f2fd27725dec470ab1 100644 (file)
--- a/src/Undo.h
+++ b/src/Undo.h
@@ -22,11 +22,8 @@
 namespace lyx {
 
 class Buffer;
-class BufferParams;
 class CursorData;
 class Inset;
-class MathData;
-class ParagraphList;
 
 /// This is used to combine consecutive undo recordings of the same kind.
 enum UndoKind {
@@ -47,6 +44,9 @@ enum UndoKind {
 
 class Undo
 {
+       /// noncopyable
+       Undo(Undo const &);
+       void operator=(Undo const &);
 public:
 
        Undo(Buffer &);
@@ -57,10 +57,10 @@ public:
        void clear();
 
        /// this will undo the last action - returns false if no undo possible
-       bool textUndo(CursorData &);
+       bool undoAction(CursorData &);
 
        /// this will redo the last undo - returns false if no redo possible
-       bool textRedo(CursorData &);
+       bool redoAction(CursorData &);
 
        /// End a sequence of INSERT_UNDO or DELETE_UNDO type of undo
        /// operations (grouping of consecutive characters insertion/deletion).
@@ -80,12 +80,23 @@ public:
         *  a single step. This means you can add a group whenever you are not sure.
         */
        void beginUndoGroup();
-
+       /// open a new group as above and specify a cursor to set as cur_before
+       /// of the group's undo elements.
+       /**
+        * This cursor takes precedence over what is passed to recordUndo.
+        * In the case of nested groups, only the first cur_before is
+        * taken into account. The cursor is reset at the end of the
+        * top-level group.
+        */
+       void beginUndoGroup(CursorData const & cur_before);
        /// end the current undo group.
        void endUndoGroup();
-
        /// end the current undo group and set UndoElement::cur_after if necessary.
-       void endUndoGroup(CursorData const &);
+       void endUndoGroup(CursorData const & cur_after);
+       /// end abruptly the current group and create a new one wih the same nesting level
+       void splitUndoGroup(CursorData const & cur);
+       /// return true if an undo group is open and contains at least one element
+       bool activeUndoGroup() const;
 
        /// The general case: record undo information for an arbitrary range.
        /**
@@ -117,6 +128,28 @@ private:
 };
 
 
+/** Helper class to simplify the use of undo groups across several buffers.
+ *
+ *  The undo group is open when the object is instantiated or when
+ *  the buffer is reset; it is then ended as the object goes out of
+ *  scope (see below)
+ */
+class UndoGroupHelper {
+public:
+       // Begin a new undo group for buffer \c buf.
+       UndoGroupHelper(Buffer * buf);
+       // End all active undo groups.
+       ~UndoGroupHelper();
+
+       // Begin if needed an undo group for buffer \c buf.
+       void resetBuffer(Buffer * buf);
+
+private:
+       class Impl;
+       Impl * const d;
+};
+
+
 
 } // namespace lyx