Duplicate works on discontiguous selections by duplicating each selection.

UndoGroup class simplifies grouping actions together in the undo history.

1 files changed, 21 insertions, 0 deletions

diff --git a/src/Document.h b/src/Document.h
index 4751cd2c8..240d59e39 100644
--- a/src/Document.h
+++ b/src/Document.h
@@ -320,6 +320,27 @@ private:
 	void NotifyModified(DocModification mh);
 };
 
+class UndoGroup {
+	Document *pdoc;
+	bool groupNeeded;
+public:
+	UndoGroup(Document *pdoc_, bool groupNeeded_=true) : 
+		pdoc(pdoc_), groupNeeded(groupNeeded_) {
+		if (groupNeeded) {
+			pdoc->BeginUndoAction();
+		}
+	}
+	~UndoGroup() {
+		if (groupNeeded) {
+			pdoc->EndUndoAction();
+		}
+	}
+	bool Needed() const {
+		return groupNeeded;
+	}
+};
+
+
 /**
  * To optimise processing of document modifications by DocWatchers, a hint is passed indicating the
  * scope of the change.