// $Id: ai_layer.cpp 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============================ */ #include "camtypes.h" //#include "ccobject.h" - in camtypes.h [AUTOMATICALLY REMOVED] #include "ai5_eps.h" #include "ai_layer.h" CC_IMPLEMENT_DYNAMIC ( AILayerProcessor, CCObject ) /******************************************************************************************** > AILayerProcessor::AILayerProcessor ( void ) Author: Graeme_Sutherland (Xara Group Ltd) Created: 16/4/00 Purpose: Default constructor. SeeAlso: AILayerProcessor::~AILayerProcessor () ********************************************************************************************/ AILayerProcessor::AILayerProcessor ( void ) { // Initialise all member variables to their default state. mLayerName.Empty (); // Clear the layer name string. mIsLocked = FALSE; // Set the layer locked flag to FALSE. mIsPrintable = FALSE; // Set the layer printable flag to FALSE. mIsVisible = FALSE; // Set the layer visible flag to FALSE. } /******************************************************************************************** > AILayerProcessor::~AILayerProcessor ( void ) Author: Graeme_Sutherland (Xara Group Ltd) Created: 16/4/00 Purpose: Default destructor. SeeAlso: AILayerProcessor::AILayerProcessor () ********************************************************************************************/ AILayerProcessor::~AILayerProcessor ( void ) { // Nothing needs to be done. } /******************************************************************************************** > BOOL AILayerProcessor::DecodeAI5Lb ( AI5EPSFilter &Filter ) Author: Graeme_Sutherland (Xara Group Ltd) Created: 16/4/00 Inputs: pFilter - A pointer to the AI5EPSFilter being used for the export. Returns: TRUE - Success. FALSE - An error has occurred. Purpose: Extracts the layer information from the Lb record. The AI file format allows for more fine-grained control over the layers than the Camelot version, and so much of it is rejected. SeeAlso: AILayerProcessor::DecodeLB (), AILayerProcessor::DecodeLn (), AI5EPSFilter::ProcessToken() ********************************************************************************************/ BOOL AILayerProcessor::DecodeAI5Lb ( AI5EPSFilter &Filter ) { INT32 IsVisible = 0; INT32 IsLocked = 0; INT32 IsPrintable = 0; // Pop the information off the stack. if ( !Filter.GetStack ().Discard ( 6 ) || // Discard the unused data on the stack. !Filter.GetStack ().Pop ( &IsPrintable ) || // Extract whether it's printable. !Filter.GetStack ().Pop ( &IsLocked ) || // Extract whether the layer is locked. !Filter.GetStack ().Discard ( 1 ) || // Discard the unused flag. !Filter.GetStack ().Pop ( &IsVisible ) ) // Extract the layer visibility data. { // There has been a problem extracting the data. Return a FALSE value to inform the // AIEPS filter. return FALSE; } // Set up the layer state flags from the information in the Lb operator. The default // state is false, so only one branch needs to be evaluated. if ( !IsLocked ) { mIsLocked = TRUE; // Set the layer locked flag to TRUE. } if ( IsPrintable ) { mIsPrintable = TRUE; // Set the printable flag to TRUE. } if ( IsVisible ) { mIsVisible = TRUE; // Set the visible flag to TRUE. } // Success. return TRUE; } /******************************************************************************************** > BOOL AILayerProcessor::DecodeAI8Lb ( AI5EPSFilter &Filter ) Author: Graeme_Sutherland (Xara Group Ltd) Created: 16/4/00 Inputs: pFilter - A pointer to the AI5EPSFilter being used for the export. Returns: TRUE - Success. FALSE - An error has occurred. Purpose: The syntax of the Lb operator has changed in AI8, and this function is intended to handle the newer version. SeeAlso: AILayerProcessor::DecodeAI5Lb (), AILayerProcessor::DecodeLB () AILayerProcessor::DecodeLn (), AI8EPSFilter::ProcessToken () ********************************************************************************************/ BOOL AILayerProcessor::DecodeAI8Lb ( AI5EPSFilter &Filter ) { INT32 IsVisible = 0; INT32 IsLocked = 0; INT32 IsPrintable = 0; // Pop the information off the stack. if ( !Filter.GetStack ().Discard ( 9 ) || // Discard the unused data on the stack. !Filter.GetStack ().Pop ( &IsPrintable ) || // Extract whether it's printable. !Filter.GetStack ().Pop ( &IsLocked ) || // Extract whether the layer is locked. !Filter.GetStack ().Discard ( 1 ) || // Discard the unused flag. !Filter.GetStack ().Pop ( &IsVisible ) ) // Extract the layer visibility data. { // There has been a problem extracting the data. Return a FALSE value to inform the // AIEPS filter. return FALSE; } // Set up the layer state flags from the information in the Lb operator. The default // state is false, so only one branch needs to be evaluated. if ( !IsLocked ) { mIsLocked = TRUE; // Set the layer locked flag to TRUE. } if ( IsPrintable ) { mIsPrintable = TRUE; // Set the printable flag to TRUE. } if ( IsVisible ) { mIsVisible = TRUE; // Set the visible flag to TRUE. } // Success. return TRUE; } /******************************************************************************************** > BOOL AILayerProcessor::DecodeLB ( AI5EPSFilter &Filter ) Author: Graeme_Sutherland (Xara Group Ltd) Created: 16/4/00 Inputs: pFilter - A pointer to the AI5EPSFilter being used for the export. Returns: TRUE - Success. FALSE - An error has occurred. Purpose: Processes the LB command, which is the end of layer indicator. SeeAlso: AILayerProcessor::DecodeLb (), AI5EPSFilter::ProcessToken() ********************************************************************************************/ BOOL AILayerProcessor::DecodeLB ( AI5EPSFilter &Filter ) { // Push the insert point in the tree up a level, so that any future layers are inserted // in the correct place. This is done automatically by the EPSFilter class, so this // method is redundant. return TRUE; } /******************************************************************************************** > BOOL AILayerProcessor::DecodeLn ( AI5EPSFilter &Filter ) Author: Graeme_Sutherland (Xara Group Ltd) Created: 16/4/00 Inputs: pFilter - A pointer to the AI5EPSFilter being used for the export. Returns: TRUE - Success. FALSE - An error has occurred. Purpose: Processes the Ln command, which is used to set the layer's name. SeeAlso: AILayerProcessor::DecodeLb (), AI5EPSFilter::ProcessToken() ********************************************************************************************/ BOOL AILayerProcessor::DecodeLn ( AI5EPSFilter &Filter ) { // Pop the layer's name off the stack, and store it in the mLayerName member variable. if ( !Filter.GetStack ().Pop ( &mLayerName ) ) { // There's been a problem, so inform the filter that invoked this command. return FALSE; } // Create a new layer using the stored information. return Filter.CreateLayer ( mLayerName, mIsLocked, mIsPrintable, mIsVisible ); }