pscommentlexer.h

/* This file is part of the KDE project
   Copyright (C) 2002, Dirk Schönberger <dirk.schoenberger@sz-online.de>
 
   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 PSCOMMENTLEXER_H
#define PSCOMMENTLEXER_H
 
#include <tqiodevice.h>
#include <tqstring.h>

typedef enum {
  State_Comment=0,
  State_CommentEncodedChar,
  State_Start
} State;
 
typedef enum {
  Action_Copy=1,
  Action_CopyOutput,
  Action_Output,
  Action_Ignore,
  Action_Abort,
  Action_OutputUnget,
  Action_InitTemp,
  Action_CopyTemp,
  Action_DecodeUnget,
  Action_ByteArraySpecial
} Action;
 
class StringBuffer {
public:
  StringBuffer ();
  virtual ~StringBuffer ();
 
  void append (char c);
  void clear();
  TQString toString() const;
  uint length();
  double toFloat();
  int toInt();
  const char *latin1();
  TQString mid( uint index, uint len=0xffffffff) const;
private:
  char *m_buffer;
  uint m_length;
  int m_capacity;
 
  void ensureCapacity (int p_capacity);
};
 
class PSCommentLexer {
public:
    PSCommentLexer();
    virtual ~PSCommentLexer();
 
  virtual bool parse (TQIODevice& fin);
private:
  State m_curState;
  StringBuffer m_buffer;
  StringBuffer m_temp;
 
  void nextStep (char c, State* newState, Action* newAction);
 
  void doOutput ();
  uchar decode();
 
protected:
  virtual void parsingStarted();
  virtual void parsingFinished();
  virtual void parsingAborted();
 
  virtual void gotComment (const char *value);
};
 
class BoundingBoxExtractor : public PSCommentLexer
{
public:
    BoundingBoxExtractor();
    virtual ~BoundingBoxExtractor();
 
  int llx() { return m_llx; }
  int lly() { return m_lly; }
  int urx() { return m_urx; }
  int ury() { return m_ury; }
private:
  int m_llx, m_lly, m_urx, m_ury;
  bool getRectangle (const char* input, int &llx, int &lly, int &urx, int &ury);
 
protected:
  void gotComment (const char *value);
};
 
#endif