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125 lines
3.3 KiB
125 lines
3.3 KiB
5 years ago
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//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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//=============================================================================
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#ifndef UNDOMANAGER_H
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#define UNDOMANAGER_H
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#ifdef _WIN32
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#pragma once
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#endif
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#include "tier1/utlsymbol.h"
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#include "tier1/utllinkedlist.h"
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#include "tier1/utlstack.h"
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//-----------------------------------------------------------------------------
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// Forward declarations
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//-----------------------------------------------------------------------------
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class IUndoElement;
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struct UndoInfo_t;
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class IDmNotify;
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//-----------------------------------------------------------------------------
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// Undo/Redo stuff:
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//-----------------------------------------------------------------------------
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class CUndoManager
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{
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public:
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CUndoManager();
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~CUndoManager();
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void Shutdown();
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void SetUndoDepth( int nMaxUndoDepth );
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void AddUndoElement( IUndoElement *pElement );
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void Undo();
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void Redo();
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void TraceUndo( bool state );
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void EnableUndo();
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void DisableUndo();
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bool IsEnabled() const;
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bool HasUndoData() const;
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bool UndoDataDiscarded() const;
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bool HasRedoData() const;
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void WipeUndo();
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void WipeRedo();
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const char *UndoDesc() const;
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const char *RedoDesc() const;
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void PushUndo( char const *udesc, char const *rdesc, int nChainingID );
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void PushRedo();
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void AbortUndoableOperation();
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UtlSymId_t GetUndoDescInternal( const char *context );
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UtlSymId_t GetRedoDescInternal( const char *context );
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void GetUndoInfo( CUtlVector< UndoInfo_t >& list );
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bool InstallNotificationCallback( IDmNotify *pNotify );
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void RemoveNotificationCallback( IDmNotify *pNotify );
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bool IsSuppressingNotify( ) const;
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void SetSuppressingNotify( bool bSuppress );
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void PushNotificationScope( const char *pReason, int nNotifySource, int nNotifyFlags );
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void PopNotificationScope( bool bAbort );
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void NotifyState( int nNotifyFlags );
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static const char *GetUndoString( CUtlSymbol sym );
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private:
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void Trace( PRINTF_FORMAT_STRING const char *fmt, ... );
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CUtlLinkedList< IUndoElement *, int > m_UndoList;
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CUtlStack< IUndoElement * > m_RedoStack;
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CUtlVector< IDmNotify* > m_Notifiers;
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int m_nMaxUndoDepth;
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int m_nNesting;
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int m_nNotifyNesting;
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CUtlSymbol m_UndoDesc;
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CUtlSymbol m_RedoDesc;
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int m_nNotifySource;
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int m_nNotifyFlags;
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const char* m_pNotifyReason;
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int m_nItemsAddedSinceStartOfStream;
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// Signals that next undo operation is the "Start" of a stream
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bool m_bStreamStart : 1;
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bool m_bTrace : 1;
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bool m_bDiscarded : 1;
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bool m_bEnabled : 1;
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bool m_bSuppressingNotify : 1;
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static CUtlSymbolTableMT s_UndoSymbolTable;
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int m_nChainingID;
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int m_PreviousChainingID;
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};
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//-----------------------------------------------------------------------------
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// Is undo enabled
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//-----------------------------------------------------------------------------
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inline bool CUndoManager::IsEnabled() const
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{
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return m_bEnabled;
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}
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inline void CUndoManager::NotifyState( int nNotifyFlags )
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{
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// FIXME: Should suppress prevent notification being sent,
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// or prevent notification flags from being set in the first place?
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m_nNotifyFlags |= nNotifyFlags;
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}
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inline const char *CUndoManager::GetUndoString( CUtlSymbol sym )
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{
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return s_UndoSymbolTable.String( sym );
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}
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#endif // UNDOMANAGER_H
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