// $Id: plugin.cpp 751 2006-03-31 15:43:49Z alex $ // // File which implements plug-in related items. At present this includes // implementations of:- // PlugInItem // PlugInPath // PlugInPathList /* @@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. 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Xara Group Ltd, Gaddesden Place, Hemel Hempstead, HP2 6EX, UK. http://www.xara.com/ =================================XARAHEADEREND============================ */ #include "camtypes.h" #include "plugin.h" // Place any IMPLEMENT type statements here CC_IMPLEMENT_DYNAMIC(PlugInItem, ListItem) CC_IMPLEMENT_DYNAMIC(PlugInPath, ListItem) CC_IMPLEMENT_DYNAMIC(PlugInPathList, List) // We want better memory tracking #define new CAM_DEBUG_NEW /************************************************************************************** > PlugInItem::PlugInItem() Author: Neville_Humphrys (Xara Group Ltd) Created: 10/12/96 Purpose: Constructor for a PlugInItem. **************************************************************************************/ PlugInItem::PlugInItem() { // Set up the class variables to known states m_PathNameID = -1; m_ModuleName.Empty(); m_FilterName.Empty(); m_FamilyName.Empty(); m_PlugInName.Empty(); } /************************************************************************************** > virtual BOOL PlugInItem::About() Author: Neville_Humphrys (Xara Group Ltd) Created: 11/12/96 Returns: True if works ok, False otherwise. Purpose: Find out about a plug-in. **************************************************************************************/ BOOL PlugInItem::About() { ERROR3("PlugInItem::About baseclass invoked!"); return TRUE; } /************************************************************************************** > virtual BOOL PlugInItem::Apply(KernelBitmap *pInputBitmap, Document* pDocument, KernelBitmap **ppOutputBitmap = NULL) Author: Neville_Humphrys (Xara Group Ltd) Created: 17/12/96 Inputs: pInputBitmap the bitmap to apply the effect to pDocument document the bitmap is in Outputs: ppOutputBitmap if specified, a pointer to the output bitmap generated Returns: True if works ok, False otherwise. Purpose: Applies a plug-in's bitmap effect to the specified bitmap. **************************************************************************************/ BOOL PlugInItem::Apply(KernelBitmap *pInputBitmap, Document* pDocument, KernelBitmap **ppOutputBitmap) { ERROR3("PlugInItem::Apply baseclass invoked!"); return TRUE; } /************************************************************************************** > virtual BOOL PlugInItem::ApplyLastFilter(KernelBitmap *pInputBitmap, Document* pDocument, KernelBitmap **ppOutputBitmap = NULL) Author: Neville_Humphrys (Xara Group Ltd) Created: 17/12/96 Inputs: pInputBitmap the bitmap to apply the effect to pDocument document the bitmap is in Outputs: ppOutputBitmap if specified, a pointer to the output bitmap generated Returns: True if works ok, False otherwise. Purpose: Applies a plug-in's bitmap effect to the specified bitmap using the last applied parameters. Assumes that Apply for this plug-in has been called already. **************************************************************************************/ BOOL PlugInItem::ApplyLastFilter(KernelBitmap *pInputBitmap, Document* pDocument, KernelBitmap **ppOutputBitmap) { ERROR3("PlugInItem::ApplyLastFilter baseclass invoked!"); return TRUE; } /************************************************************************************** > virtual BOOL PlugInItem::IsBitmapModeOk(INT32 ColourDepth) Author: Neville_Humphrys (Xara Group Ltd) Created: 6/1/97 Inputs: ColourDepth the colour depth or bits per pixel of the bitmap GreyScale only relevent if bitmap is 8bpp, True if greyscale Returns: True if the bitmap is compatible and False otherwise. Purpose: Checks to see if a plug-in can cope with the specified colour depth. **************************************************************************************/ BOOL PlugInItem::IsBitmapModeOk(INT32 ColourDepth, BOOL GreyScale) { return FALSE; } /************************************************************************************** **************************************************************************************/ /************************************************************************************** > PlugInPath::PlugInPath( const PathName& NewPath, INT32 ID, BOOL IsHidden = FALSE) Author: Neville_Humphrys (Xara Group Ltd) Created: 9/12/96 Inputs: Path - the pathname to put in the list. ID - the ID a plug-in item uses to associate itself with a pathname IsHidden - the pathname is not one added by the user (Defaults to FALSE) Purpose: Create a new plug-in pathname list item from the given pathname. SeeAlso: PlugInPathList; **************************************************************************************/ PlugInPath::PlugInPath( const PathName& NewPath, INT32 ID, BOOL IsHidden) { // Initialise our class variables to these specified values. m_Path = NewPath; m_PathNameID = ID; m_IsHidden = IsHidden; } /************************************************************************************** **************************************************************************************/ /************************************************************************************** > PlugInPathList::~PlugInPathList() Author: Neville_Humphrys (Xara Group Ltd) Created: 10/12/96 Inputs: - Outputs: - Returns: - Purpose: Constructor for the list of pathnames to parse plug-ins for. SeeAlso: PlugInPath **************************************************************************************/ PlugInPathList::PlugInPathList() { m_IDCounter = 0; } /************************************************************************************** > PlugInPathList::~PlugInPathList() Author: Neville_Humphrys (Xara Group Ltd) Created: 9/12/96 Inputs: - Outputs: - Returns: - Purpose: Destroy the list of pathnames to parse plug-ins for. SeeAlso: PlugInPath **************************************************************************************/ PlugInPathList::~PlugInPathList() { // Destroy the list of pathnames which we may have /* PlugInPath* pPath = (PlugInPath *)GetHead(); while (pPath) { delete pPath; // Try the next pathname in the list pPath = (PlugInPath *)GetNext(pPath); } */ DeleteAll(); } /************************************************************************************** > PlugInPath * PlugInPathList::GetFirstPath() Author: Neville_Humphrys (Xara Group Ltd) Created: 9/1/97 Returns: Pointer to the first PlugInPath or NULL if there are none. Purpose: Finds the first pathname in the list of plug-in pathnames. When searching the pathname list, you MUST use these form of the list classes GetHead/GetNext as otherwise you will get unknown effects. SeeAlso: GetNextPath **************************************************************************************/ PlugInPath * PlugInPathList::GetFirstPath() { // Get the real first item, if there is one PlugInPath * pPath = (PlugInPath * ) GetHead(); // While there is an item and it is hidden then search for the next one in the list while (pPath && pPath->IsHidden()) { pPath = (PlugInPath * ) GetNext(pPath); } return pPath; } /************************************************************************************** > PlugInPath * PlugInPathList::GetNextPath(const PlugInPath * pCurrentItem) Author: Neville_Humphrys (Xara Group Ltd) Created: 9/1/97 Returns: Pointer to the first PlugInPath or NULL if there are none. Purpose: Finds the next pathname in the list of plug-in pathnames. When searching the pathname list, you MUST use these form of the list classes GetHead/GetNext as otherwise you will get unknown effects. SeeAlso: GetNextPath **************************************************************************************/ PlugInPath * PlugInPathList::GetNextPath(const PlugInPath * pCurrentItem) { ERROR3IF(pCurrentItem == NULL,"GetNextPath has been given a null current item"); if (pCurrentItem == NULL) return NULL; // Get the real next item, if there is one PlugInPath * pPath = (PlugInPath * ) GetNext(pCurrentItem); // While there is an item and it is hidden then search for the next one in the list while (pPath && pPath->IsHidden()) { pPath = (PlugInPath * ) GetNext(pPath); } return pPath; } /************************************************************************************** > BOOL PlugInPathList::RemoveHiddenItems() Author: Neville_Humphrys (Xara Group Ltd) Created: 9/1/97 Returns: True if completed succesfully, False otherwise. Purpose: Removes all hidden items, i.e. ones not added by the user, from the list of pathnames. **************************************************************************************/ BOOL PlugInPathList::RemoveHiddenItems() { // Go through all the paths in the list and remove all those with the hidden // attribute set. PlugInPath* pPath = (PlugInPath *)GetHead(); while (pPath) { if (pPath->IsHidden()) { // The item is hidden so remove it // First, find the next item, if there is one PlugInPath* pNextPath = (PlugInPath *)GetNext(pPath); RemoveItem(pPath); // remove item returns NULL if problem if (pPath == NULL) return FALSE; // remove the old path item from memory delete pPath; // move to considering the next item pPath = pNextPath; } else { // Try the next pathname in the list pPath = (PlugInPath *)GetNext(pPath); } } return TRUE; } /************************************************************************************** > PlugInPath * PlugInPathList::AddPathName( const PathName& NewPath, BOOL IsHidden = FALSE) Author: Neville_Humphrys (Xara Group Ltd) Created: 9/12/96 Inputs: NewPath - the new pathname to put in the list. IsHidden - the pathname is not one added by the user (Defaults to FALSE) Returns: Pointer to the newly added pathname, or NULL if out of memory => ERROR1 Purpose: Add a new pathname to the list of plug-in pathnames. Hidden pathnames are ones not added by the user but are the sub-directories of the user added ones. Errors: Out of memory => ERROR1 SeeAlso: PlugInPath **************************************************************************************/ PlugInPath * PlugInPathList::AddPathName( const PathName& NewPath, BOOL IsHidden ) { PlugInPath *pPlugPath = new PlugInPath(NewPath, m_IDCounter, IsHidden); // Increment our counter which a plug-in uses to associate itself with a pathname m_IDCounter++; // Check for out of memory if (pPlugPath == NULL) return NULL; // Add to the list and return success AddTail(pPlugPath); return pPlugPath; } /************************************************************************************** > BOOL PlugInPathList::DeletePathName( const PathName& OldPath) Author: Neville_Humphrys (Xara Group Ltd) Created: 9/12/96 Inputs: OldPath - the pathname to delete from the list. Returns: True if deleted ok, False otherwise. Purpose: Delete a pathname from the list of plug-in pathnames. SeeAlso: PlugInPath **************************************************************************************/ BOOL PlugInPathList::DeletePathName( const PathName& OldPath ) { String_256 OldPathStr = OldPath.GetPath(); PlugInPath* pPath = (PlugInPath *)GetHead(); while (pPath) { PathName Path = pPath->GetPathName(); if (Path.GetPath() == OldPathStr) { RemoveItem(pPath); // remove item returns NULL if problem if (pPath == NULL) return FALSE; delete pPath; return TRUE; } // Try the next pathname in the list pPath = (PlugInPath *)GetNext(pPath); } // Failed to find the path in the list return FALSE; } /************************************************************************************** **************************************************************************************/