// $Id: filtrmgr.h 1282 2006-06-09 09:46:49Z alex $ /* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE ================================XARAHEADERSTART=========================== Xara LX, a vector drawing and manipulation program. Copyright (C) 1993-2006 Xara Group Ltd. Copyright on certain contributions may be held in joint with their respective authors. See AUTHORS file for details. LICENSE TO USE AND MODIFY SOFTWARE ---------------------------------- This file is part of Xara LX. Xara LX is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation. Xara LX and its component source files are distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. 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Xara Group Ltd, Gaddesden Place, Hemel Hempstead, HP2 6EX, UK. http://www.xara.com/ =================================XARAHEADEREND============================ */ // #ifndef INC_FILTRMGR #define INC_FILTRMGR #include "ccarray.h" //#include "list.h" - in camtypes.h [AUTOMATICALLY REMOVED] typedef UINT32 FileFormatID; class Filter; /************************************************************************************** > class FilterList : public List Author: Colin_Barfoot (Xara Group Ltd) Created: Today Purpose: Take out some of the functionality from filters **************************************************************************************/ class FilterList : public List { CC_DECLARE_MEMDUMP(FilterList) public: FilterList(); BOOL AddFilter(Filter* const pFilter, const UINT32 ID); }; class FileFormat; class FormatEntry; class FilterEntry; class FilterList; class FilterSearchCriteria; class FormatArray : public CCArray { }; class FileFormat; /************************************************************************************** > class FilterManager : public CC_CLASS_MEMDUMP Author: Colin_Barfoot (Xara Group Ltd) Created: Today Purpose: Take out some of the functionality from filters **************************************************************************************/ class FilterManager : public CC_CLASS_MEMDUMP { // Declare the class for memory tracking CC_DECLARE_MEMDUMP(FilterManager); public: FilterManager(); BOOL Init(); INT32 DeInit(); // Registering functions // What to do with filters, formats & families at the end of the day enum DESTRUCTION_METHOD { DM_INVALID = 0, // don't use this, it's for catching duff initialization DM_DELETE_WHEN_DONE = 1, DM_KEEP_WHEN_DONE }; UINT32 RegisterFilter( Filter* const pFilter, const DESTRUCTION_METHOD DestructMethod); FileFormatID RegisterFileFormat( FileFormat* const pFormat, const DESTRUCTION_METHOD DestructMethod); // Aggregation functions BOOL AssociateFilterWithFormat( const UINT32 FilterID, const FileFormatID FileFormatID); // Search functions // Filters... Filter* FindFilterFromID(const UINT32 FilterID) const; Filter* FindFilter(FilterSearchCriteria& Criteria) const; FilterList* ListMatchingFilters(FilterSearchCriteria& Criteria); // FileFormats... FileFormat* FindFormatFromID(const FileFormatID FormatID) const; FileFormat* FindFormatFromName(const StringBase& FormatName) const; FileFormatID FindFormatIDFromName(const StringBase& Name) const; protected: List& GetFilters() const; const UINT32 FILTERID_START; UINT32 GetNewFilterID(); FormatArray& GetFormats(); const FormatArray& GetFormats() const { return m_Formats; } const FileFormatID FORMATID_START; FileFormatID GetNewFormatID(); FileFormatID GetLastFormatID() const { return m_NextFormatID - 1; } // And for searching FormatEntry* FindFormatEntryFromID(const FileFormatID FormatID) const; FormatEntry* FindFormatEntryFromName(const StringBase& FormatName) const; private: // Lists of things the filter manager works with UINT32 m_NextFilterID; FormatArray m_Formats; FileFormatID m_NextFormatID; }; /******************************************************************************************** > class FilterEntry : public ListItem Author: Colin_Barfoot (Xara Group Ltd) (from Tim) Created: 28/03/94 Purpose: A simple ListItem derived class to allow a list of filters to be maintained - the list holds all the filters that claim to understand a particular file (see FilterFamily). It is not derived from the Filter class itself because although the Filter class is derived from ListItem too, we want to store a list of pointers to existing filters, rather than actual instances of the Filter class. For each entry, a 'compatibility rating' is held, to allow the FilterFamily class (the client of this class) to choose the most compatible filter from the list. SeeAlso: CompatibleFilterList; Filter; ListItem ********************************************************************************************/ class FilterEntry : public ListItem { CC_DECLARE_MEMDUMP(FilterEntry) public: FilterEntry(Filter* const pFilter, const UINT32 ID); protected: // Compatibility rating for this filter. Filter* m_pFilter; UINT32 m_FilterID; }; /******************************************************************************************** > class FormatEntry : protected CC_CLASS_MEMDUMP Author: Colin_Barfoot (Xara Group Ltd) Created: 28/11/96 Purpose: A simple ListItem derived class to allow a list of filters to be maintained SeeAlso: FilterList Scope: private to FilterManager ********************************************************************************************/ class FilterManager; class FormatEntry : public CC_CLASS_MEMDUMP { CC_DECLARE_MEMDUMP(FormatEntry) public: FormatEntry(const FileFormatID ID, FileFormat* const pFormat, const FilterManager::DESTRUCTION_METHOD DestructMethod); ~FormatEntry(); FileFormat* GetFormat() const { return m_pFormat; } FileFormatID GetID() const { return m_FormatID; } FilterList& GetFilters() { return m_AssociatedFilters; } FilterManager::DESTRUCTION_METHOD GetDestructionMethod() const { return m_DestructMethod; } protected: FileFormat* m_pFormat; // Pointer to the format in question. FileFormatID m_FormatID; // and it's ID FilterList m_AssociatedFilters; // A list of filters that think they can cope // What to do with the format at the end... FilterManager::DESTRUCTION_METHOD m_DestructMethod; }; #endif // INC_FILTRMGR