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//////////////////////////////////////////////////////////////////////////////
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//主要功能: Undo and Redo的全局操作函数，为了区分符号修改与文件修改的Redo/Undo
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//
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//程序编写: 2006-12-07
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/////////////////////////////////////////////////////////////////////////////
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#if !defined(UNDOMANAGER_H)
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#define UNDOMANAGER_H
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#if _MSC_VER >= 1000
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#pragma once
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#endif // _MSC_VER >= 1000
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#ifdef _MSC_VER
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#pragma warning(disable:4786)
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#endif
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#include <deque>
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#include <vector>
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#include "UMString.h"
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namespace NAction
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{
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/**
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* Action 详情
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*/
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struct ActionDetail
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{
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std::string uuid;
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std::string classType;
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std::string createAt;
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};
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class CAction;
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class CActionManager
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{
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public:
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enum StackKind
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{
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UNDO,
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REDO
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};
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public:
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CActionManager(void *actionTarget);
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virtual ~CActionManager();
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void RemoveLastAction();
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void ClearTarget();
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long GetStackCapacity() const;
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void SetStackCapacity(long capacity);
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void SetLastAction(CAction *itsLastAction);
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const UMString & GetActionName(StackKind kind, long pos) const;
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long GetStackSize(StackKind kind) const;
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virtual int Undo(long nActions = 1);
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virtual bool CanUndo(long nActions = 1) const;
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virtual int Redo(long nActions = 1);
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virtual bool CanRedo(long nActions = 1) const;
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void * GetTarget() const;
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void TargetCleaned();
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void SavePostion();
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bool IsModified();
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// we use a deque so that we can pop off both ends
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// (e.g., off the bottom during overflow) and so we
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// can access all actions, say when building an undo
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// menu, rather than just the top; also note that we
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// push onto the back (like you would with a vector)
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typedef std::deque<CAction *> ActionStack;
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const ActionStack& GetUndoStack() const;
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const ActionStack& GetRedoStack() const;
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/**
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* 列出 * Action 清单
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*
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* \return
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*/
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std::vector<ActionDetail> ListActionDetails() const;
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/**
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* 恢复到指定 action，如果为 uuid 为空，表示恢复到原图件
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*
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* \param uuid
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*/
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void RestoreToTargetAction(const std::string& targetUUID);
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protected:
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virtual void DeleteActions(ActionStack &aStack, long nActions);
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//virtual void NotifyTarget(UINT operation, long nActions);
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void * actionTarget;
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ActionStack undoStack, redoStack;
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long cleanMarker;
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long capacity;
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CAction* m_pSavedAction;
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private:
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/**
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* 判断指定 uuid 的 Action 是否在 undo 栈中
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*
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* \param uuid
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* \return
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*/
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bool InUndoStack(const std::string& uuid) const;
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/**
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* 判断指定 uuid 的 Action 是否在 redo 栈中
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*
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* \param uuid
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* \return
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*/
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bool InRedoStack(const std::string& uuid) const;
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};
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} //end namespace
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#endif
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