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#ifndef __PostScript_Handler_hpp__
#define __PostScript_Handler_hpp__ 1
// =================================================================================================
// Copyright Adobe
// Copyright 2004 Adobe
// All Rights Reserved
//
// NOTICE: Adobe permits you to use, modify, and distribute this file in accordance with the terms
// of the Adobe license agreement accompanying it.
// =================================================================================================
#include "public/include/XMP_Environment.h" // ! XMP_Environment.h must be the first included header.
#include "public/include/XMP_Const.h"
#include "public/include/XMP_IO.hpp"
#include "XMPFiles/source/FormatSupport/PostScript_Support.hpp"
// =================================================================================================
/// \file PostScript_Handler.hpp
/// \brief File format handler for PostScript and EPS files.
///
/// This header ...
///
// =================================================================================================
extern XMPFileHandler * PostScript_MetaHandlerCTor ( XMPFiles * parent );
extern bool PostScript_CheckFormat ( XMP_FileFormat format,
XMP_StringPtr filePath,
XMP_IO * fileRef,
XMPFiles * parent );
static const XMP_OptionBits kPostScript_HandlerFlags = (
kXMPFiles_CanInjectXMP
|kXMPFiles_CanExpand
|kXMPFiles_CanRewrite
|kXMPFiles_PrefersInPlace
|kXMPFiles_CanReconcile
|kXMPFiles_AllowsOnlyXMP
|kXMPFiles_ReturnsRawPacket
|kXMPFiles_AllowsSafeUpdate
|kXMPFiles_CanNotifyProgress );
class PostScript_MetaHandler : public XMPFileHandler
{
public:
PostScript_MetaHandler ( XMPFiles * parent );
~PostScript_MetaHandler();
void CacheFileData();
void UpdateFile ( bool doSafeUpdate );
void ProcessXMP ( );
void WriteTempFile ( XMP_IO* tempRef );
int psHint;
/* Structure used to keep
Track of Tokens in
EPS files
*/
struct TokenLocation{
//offset from the begining of the file
// at which the token string starts
XMP_Int64 offsetStart;
//Total length of the token string
XMP_Int64 tokenlen;
TokenLocation():offsetStart(-1),tokenlen(0)
{}
};
protected:
//Determines the postscript hint in the DSC comments
int FindPostScriptHint();
// Helper methods to get the First or the Last packet from the
// PS file based upon the PostScript hint that is present in the PS file
bool FindFirstPacket();
bool FindLastPacket();
//Facilitates read time reconciliation of PS native metadata
void ReconcileXMP( const std::string &xmpStr, std::string *outStr );
//Facilitates reading of XMP packet , if one exists
void ReadXMPPacket ( std::string & xmpPacket);
// Parses the PS file to record th epresence and location of
// XMP packet and native metadata in the file
void ParsePSFile();
// Helper function to record the native metadata key/avlue pairs
// when parsing the PS file
void RegisterKeyValue(std::string& key, std::string& value);
// Helper Function to record the location and length of the Tokens
// in the opened PS file
void setTokenInfo(TokenFlag tFlag,XMP_Int64 offset,XMP_Int64 length);
// Getter to get the location of a token ina PS file.
TokenLocation& getTokenInfo(TokenFlag tFlag);
//modifies the Binary Header of a PS file as per the modifications
void modifyHeader(XMP_IO* fileRef,XMP_Int64 extrabytes,XMP_Int64 offset );
//Extract the values for different DSC comments
bool ExtractDSCCommentValue(IOBuffer &ioBuf,NativeMetadataIndex index);
//Extract value for ADO_ContainsXMP Comment
bool ExtractContainsXMPHint(IOBuffer &ioBuf,XMP_Int64 containsXMPStartpos);
//Extract values from DocInfo Dict
bool ExtractDocInfoDict(IOBuffer &ioBuf);
//Determine the update method to be used
UpdateMethod DetermineUpdateMethod(std::string & outStr);
void DetermineInsertionOffsets(XMP_Int64& ADOhintOffset,XMP_Int64& InjectData1Offset,
XMP_Int64& InjectData3Offset);
//Different update methods
void InplaceUpdate (std::string &outStr,XMP_IO* &tempRef, bool doSafeUpdate);
void ExpandingSFDFilterUpdate (std::string &outStr,XMP_IO* &tempRef, bool doSafeUpdate );
void InsertNewUpdate ( std::string &outStr,XMP_IO* &tempRef, bool doSafeUpdate );
private:
//Flag tracks DSC comments
XMP_Uns32 dscFlags;
//Flag tracks DOCINFO keys
XMP_Uns32 docInfoFlags;
//stores the native metadata values. Index values an enum var NativeMetadataIndex
std::string nativeMeta[kPS_MaxNativeIndexValue];
//all offsets are to the end of the comment after atleast one whitespace
TokenLocation fileTokenInfo[25];
//Indicates the presence of both XMP hint and XMP
bool containsXMPHint;
//Keeps track whether a PS or EPS
XMP_FileFormat fileformat;
//keep the first packet info
XMP_PacketInfo firstPacketInfo;
//keep the last packet info
XMP_PacketInfo lastPacketInfo;
}; // PostScript_MetaHandler
// =================================================================================================
#endif /* __PostScript_Handler_hpp__ */
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