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/* This file is part of Strigi Desktop Search
*
* Copyright (C) 2006 Jos van den Oever <jos@vandenoever.info>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef PDFPARSER_H
#define PDFPARSER_H
#include <strigi/streambase.h>
class PdfParser {
public:
class StreamHandler {
public:
virtual ~StreamHandler() {}
virtual Strigi::StreamStatus handle(Strigi::StreamBase<char>* s) = 0;
};
class DefaultStreamHandler : public StreamHandler {
public:
Strigi::StreamStatus handle(Strigi::StreamBase<char>* s);
};
class TextHandler {
public:
virtual ~TextHandler() {}
virtual Strigi::StreamStatus handle(const std::string& s) = 0;
};
class DefaultTextHandler : public TextHandler {
Strigi::StreamStatus handle(const std::string& s);
};
private:
const char* start;
const char* end;
const char* pos;
int64_t bufferStart;
Strigi::StreamBase<char>* stream;
std::string m_error;
// parsed objects
double lastNumber;
std::string lastName;
std::string lastOperator;
std::string lastString;
void* lastObject;
// event handlers
StreamHandler* streamhandler;
TextHandler* texthandler;
Strigi::StreamStatus read(int32_t min, int32_t max);
void forwardStream(Strigi::StreamBase<char>* s);
Strigi::StreamStatus checkForData(int32_t m);
bool isInString(char c, const char* s, int32_t n);
Strigi::StreamStatus skipFromString(const char*str, int32_t n);
Strigi::StreamStatus skipNotFromString(const char*str, int32_t n);
Strigi::StreamStatus skipWhitespaceOrComment();
Strigi::StreamStatus skipWhitespace();
Strigi::StreamStatus skipKeyword(const char* str, int32_t len);
Strigi::StreamStatus skipXRef();
Strigi::StreamStatus skipTrailer();
Strigi::StreamStatus skipXChars();
Strigi::StreamStatus skipDigits();
Strigi::StreamStatus skipStartXRef();
Strigi::StreamStatus skipNumber();
Strigi::StreamStatus parseObjectStreamObject(int nestDepth);
Strigi::StreamStatus parseContentStreamObject();
Strigi::StreamStatus parseComment();
Strigi::StreamStatus parseBoolean();
Strigi::StreamStatus parseNumber();
Strigi::StreamStatus parseNumberOrIndirectObject();
Strigi::StreamStatus parseLiteralString();
Strigi::StreamStatus parseHexString();
Strigi::StreamStatus parseName();
Strigi::StreamStatus parseOperator();
Strigi::StreamStatus parseDictionaryOrStream();
Strigi::StreamStatus parseArray(int nestDepth);
Strigi::StreamStatus parseNull();
Strigi::StreamStatus parseObjectStreamObjectDef();
Strigi::StreamStatus handleSubStream(Strigi::StreamBase<char>* s,
const std::string& type, int32_t offset, int32_t n);
Strigi::StreamStatus handleSubStream(Strigi::StreamBase<char>* s,
const std::string& type, int32_t offset, int32_t n, bool hasfilter,
const std::string& filter);
Strigi::StreamStatus parseObjectStream(Strigi::StreamBase<char>*,
int32_t offset, int32_t n);
Strigi::StreamStatus parseContentStream(Strigi::StreamBase<char>*);
public:
PdfParser();
Strigi::StreamStatus parse(Strigi::StreamBase<char>* s);
const std::string& error() { return m_error; }
void setStreamHandler(StreamHandler* handler) { streamhandler = handler; }
void setTextHandler(TextHandler* handler) { texthandler = handler; }
};
#endif
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