Initial release

engine/vendor/vst3sdk/vstgui4/vstgui/uidescription/editing/uiundomanager.h

@@ -0,0 +1,66 @@
+// This file is part of VSTGUI. It is subject to the license terms
+// in the LICENSE file found in the top-level directory of this
+// distribution and at http://github.com/steinbergmedia/vstgui/LICENSE
+
+#pragma once
+
+#include "../../lib/vstguibase.h"
+
+#if VSTGUI_LIVE_EDITING
+
+#include "../../lib/dispatchlist.h"
+#include <list>
+#include <deque>
+
+namespace VSTGUI {
+class IAction;
+class UIGroupAction;
+class UIUndoManager;
+
+//----------------------------------------------------------------------------------------------------
+struct IUIUndoManagerListener
+{
+	virtual ~IUIUndoManagerListener () noexcept = default;
+	virtual void onUndoManagerChange () = 0;
+};
+
+//----------------------------------------------------------------------------------------------------
+class UIUndoManager : public NonAtomicReferenceCounted,
+                      protected ListenerProvider<UIUndoManager, IUIUndoManagerListener>,
+                      protected std::list<IAction*>
+{
+public:
+	UIUndoManager ();
+	~UIUndoManager () override;
+
+	void pushAndPerform (IAction* action);
+
+	UTF8StringPtr getUndoName ();
+	UTF8StringPtr getRedoName ();
+	
+	void performUndo ();
+	void performRedo ();
+	bool canUndo ();
+	bool canRedo ();
+
+	void startGroupAction (UTF8StringPtr name);
+	void endGroupAction ();
+	void cancelGroupAction ();
+
+	void clear ();
+
+	void markSavePosition ();
+	bool isSavePosition () const;
+	
+	using ListenerProvider<UIUndoManager, IUIUndoManagerListener>::registerListener;
+	using ListenerProvider<UIUndoManager, IUIUndoManagerListener>::unregisterListener;
+protected:
+	iterator position;
+	iterator savePosition;
+	using GroupActionDeque = std::deque<UIGroupAction*>;
+	GroupActionDeque groupQueue;
+};
+
+} // VSTGUI
+
+#endif // VSTGUI_LIVE_EDITING