278 lines
7.4 KiB
C++
278 lines
7.4 KiB
C++
/*
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* @doc INTERNAL
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*
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* @module _ANTIEVT.H |
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*
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*
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* Purpose:
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* Class declarations for common anti-event objects
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*
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* Author:
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* alexgo 3/25/95
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*
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* Copyright (c) 1995-2000, Microsoft Corporation. All rights reserved.
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*/
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#ifndef __ANTIEVT_H__
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#define __ANTIEVT_H__
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#include "_frunptr.h"
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class CTxtEdit;
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class CAntiEventDispenser;
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class COleObject;
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/*
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* CBaseAE
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*
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* @class
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* Base anti-event that manages a linked list of anti-events
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*
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*/
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class CBaseAE : public IAntiEvent
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{
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//@access Public Methods
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public:
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virtual void Destroy(); //@cmember Destroy
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//@cmember Undo
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virtual HRESULT Undo( CTxtEdit *ped, IUndoBuilder *publdr );
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virtual HRESULT MergeData( DWORD dwDataType, void *pdata); //@cmember
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// Merges undo data into the
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// current context.
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virtual void OnCommit( CTxtEdit *ped ); //@cmember Called when AE is
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// committed to undo stack
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virtual void SetNext( IAntiEvent *pNext ); //@cmember Sets next AE
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virtual IAntiEvent *GetNext(); //@cmember Gets next AE
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//@access Protected Methods
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protected:
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// CBaseAE should only exist as a parent class
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CBaseAE(); //@cmember Constructor
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~CBaseAE(){;}
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//@access Private Methods and Data
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private:
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IAntiEvent * _pnext; //@cmember Pointer to the next
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//AntiEvent
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};
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/*
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* CReplaceRangeAE
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*
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* @class
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* an anti-event object than undoes a CTxtPtr::ReplaceRange
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* operation
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*
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* @base public | CBaseAE
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*/
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class CReplaceRangeAE: public CBaseAE
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{
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//@access Public Methods
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public:
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// IAntiEvent methods
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virtual void Destroy(); //@cmember Destroy
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//@cmember Undo
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virtual HRESULT Undo( CTxtEdit *ped, IUndoBuilder *publdr);
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virtual HRESULT MergeData( DWORD dwDataType, void *pdata); //@cmember
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// Merges undo data into the
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// current context
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//@access Private methods and data
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private:
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//@cmember Constructor
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CReplaceRangeAE(LONG cpMin, LONG cpMax, LONG cchDel, TCHAR *pchDel,
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IAntiEvent *paeCF, IAntiEvent *paePF);
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~CReplaceRangeAE(); //@cmember Destructor
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LONG _cpMin; //@cmember cp delete start
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LONG _cpMax; //@cmember cp delete end
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LONG _cchDel; //@cmember #of chars to insert
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TCHAR * _pchDel; //@cmember chars to insert
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IAntiEvent *_paeCF; //@cmember charformat AE
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IAntiEvent *_paePF; //@cmember par format AE
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friend class CAntiEventDispenser;
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};
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/*
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* CReplaceFormattingAE
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*
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* @class
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* an anti-event object than undoes replacing multiple char formats
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*
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* @base public | CBaseAE
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*/
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class CReplaceFormattingAE: public CBaseAE
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{
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//@access Public methods
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public:
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//
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// IAntiEvent methods
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//
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virtual void Destroy(); //@cmember Destroy
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//@cmember Undo
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virtual HRESULT Undo(CTxtEdit *ped, IUndoBuilder *publdr);
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//@access Private Methods and Data
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private:
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//@cmember Constructor
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CReplaceFormattingAE(CTxtEdit* ped, LONG cp, CFormatRunPtr &rp, LONG cch,
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IFormatCache *pf, BOOL fPara);
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~CReplaceFormattingAE(); //@cmember Destuctor
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LONG _cp; //@cmember cp at formatting start
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LONG _cRuns; //@cmember # of format runs
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CFormatRun *_prgRuns; //@cmember format runs
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BOOL _fPara; //@cmember TRUE if para format
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friend class CAntiEventDispenser;
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};
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/*
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* CReplaceObjectAE
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*
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* @class
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* an anti-event object that undoes the deletion of an object
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*
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* @base public | CBaseAE
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*/
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class CReplaceObjectAE : public CBaseAE
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{
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//@access Public methods
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public:
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//
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// IAntiEvent methods
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//
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virtual void Destroy(void); //@cmember Destroy
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//@cmember Undo
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virtual HRESULT Undo(CTxtEdit *ped, IUndoBuilder *publdr);
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virtual void OnCommit(CTxtEdit *ped); //@cmember called when
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// committed
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private:
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CReplaceObjectAE(COleObject *pobj); //@cmember Constructor
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~CReplaceObjectAE(); //@cmember Destructor
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COleObject * _pobj; //@cmember pointer to the
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// deleted object
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BOOL _fUndoInvoked; //@cmember undo was invoked
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// on this object.
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friend class CAntiEventDispenser;
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};
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/*
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* CResizeObjectAE
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*
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* @class
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* an anti-event object that undoes the resizing of an object
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*
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* @base public | CBaseAE
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*/
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class CResizeObjectAE : public CBaseAE
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{
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//@access Public methods
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public:
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//
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// IAntiEvent methods
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//
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virtual void Destroy(void); //@cmember Destroy
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//@cmember Undo
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virtual HRESULT Undo(CTxtEdit *ped, IUndoBuilder *publdr);
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virtual void OnCommit(CTxtEdit *ped); //@cmember called when
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// committed
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private:
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CResizeObjectAE(COleObject *pobj, SIZEUV size); //@cmember Constructor
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~CResizeObjectAE(); //@cmember Destructor
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COleObject * _pobj; //@cmember pointer to the
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// deleted object
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SIZEUV _size; //@cmember The old size
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BOOL _fUndoInvoked; //@cmember undo was invoked
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// on this object.
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friend class CAntiEventDispenser;
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};
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/*
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* CSelectionAE
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*
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* @class
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* an anti-event object to restore a selection
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*
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* @base public | CBaseAE
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*/
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class CSelectionAE : public CBaseAE
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{
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//@access Public methods
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public:
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//
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// IAntiEvent methods
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//
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virtual void Destroy(void); //@cmember Destroy
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//@cmember Undo
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virtual HRESULT Undo(CTxtEdit *ped, IUndoBuilder *publdr);
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virtual HRESULT MergeData( DWORD dwDataType, void *pdata); //@cmember
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// Merges undo data into the
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// current context
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private:
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//@cmember Constructor
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CSelectionAE(LONG cp, LONG cch, LONG cpNext, LONG cchNext);
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~CSelectionAE(); //@cmember Destructor
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LONG _cp; //@cmember Active end
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LONG _cch; //@cmember Signed extension
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LONG _cpNext; //@cmember Next active end
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LONG _cchNext; //@cmember Next extension
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friend class CAntiEventDispenser;
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};
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/*
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* CAntiEventDispenser
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*
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* @class
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* creates anti events and caches them intelligently to provide
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* for efficient multi-level undo
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*/
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class CAntiEventDispenser
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{
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//@access Public methods
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public:
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// no memory mgmt routines; the dispenser is global
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//@cmember text antievent
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IAntiEvent * CreateReplaceRangeAE( CTxtEdit *ped, LONG cpMin,
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LONG cpMax, LONG cchDel, TCHAR *pchDel,
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IAntiEvent *paeCF, IAntiEvent *paePF );
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//@cmember formatting AE
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IAntiEvent * CreateReplaceFormattingAE( CTxtEdit *ped,
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LONG cp, CFormatRunPtr &rp, LONG cch,
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IFormatCache *pf, BOOL fPara );
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//@cmember Object AE
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IAntiEvent * CreateReplaceObjectAE(CTxtEdit *ped, COleObject *pobj);
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//@cmember Object AE
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IAntiEvent * CreateResizeObjectAE(CTxtEdit *ped, COleObject *pobj, SIZEUV size);
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//@cmember Selection AE
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IAntiEvent * CreateSelectionAE(CTxtEdit *ped, LONG cp, LONG cch,
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LONG cpNext, LONG cchNext);
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private:
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// FUTURE (alexgo): we'll want to maintain an allocation cache of
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// anti-events
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};
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// NB!! Global variable.
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extern class CAntiEventDispenser gAEDispenser;
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#endif // !__ANTIEVNT_H__
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