CTextLine.h

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/* Copyright (C) 2004 Catherine Proulx

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 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
   Lesser General Public License for more details.
   
   You should have received a copy of the GNU Lesser General Public
   License along with this library; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#ifndef _CTEXTLINE_
#define _CTEXTLINE_

#include <list>
#include "Object.h"
#include "CSymbol.h"

namespace RobotFlow {

bool IsBefore(void*, void*);

///////////////////////////////////////////////////////////////////////////////
// CTextLine.
//
//  A CTextLine is an object describing a line of text. In contains a list of CRect
//  describing the letters.
//
///////////////////////////////////////////////////////////////////////////////

class CTextLine : public FD::Object {
    
   public:

   CTextLine();

   // Ctor with a initializing CRect to set the line parameters
   CTextLine(CSymbol & firstLetter, double verticalTolerance, double horizontalTolerance);

   // Dtor Destructor
   virtual ~CTextLine();

   // Sorting the letters from left to right
   void Sort();

   // Insert a new letter in line
   void Insert(CSymbol &);

   // Checks if letter is part of current line according to its y coordinates
   bool Contains(CSymbol &);

   // Get the std::string corresponding to the sorted line
   void GetString(std::string & resultString);

   // Get the string corresponding to the sorted line
   void GetString_v2(std::string & resultString, std::list<std::vector<std::vector<float> > >&vect_list);

   // Print Object
   void printOn(std::ostream &out = std::cout) const;

   // Get the line vertical position (centerY of first character)
   int GetVerticalPosition() { return (mMinY + mMaxY)/2; }

   std::list<CSymbol*>& getSymbols(){return mLetterList;}

 private:

  // Determines whether there's a space between two characters
  bool SpacePresentBetween(const CSymbol&, const CSymbol&);

  // Minimum and minimum vertical center value for a letter to be considered
  // part of the line (upper bound and lower bounds)
  int mMinY;
  int mMaxY;

  // Maximum and minimum heights for a letter to be considered part of the line
  int mMinHeight;
  int mMaxHeight;

  // Average width of characters: used for deciding what is a space
  int mAverageWidth;

  // Tolerance on the regularity of the line
  // (even character height and vertical alignement)
  double mVerticalTolerance;

  // Tolerance on the spacing between characters
  double mHorizontalTolerance;


  ///The list of cells
  std::list<CSymbol*> mLetterList;
 
};

}//namespace RobotFlow
#endif

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