DrawingLabelManager.h

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//
// This file is part of the MADELINE 2 program 
// written by Edward H. Trager and Ritu Khanna
// Copyright (c) 2005 by the
// Regents of the University of Michigan.
// All Rights Reserved.
// 
// The latest version of this program is available from:
// 
//   http://eyegene.ophthy.med.umich.edu/madeline/
//   
// Released under the GNU General Public License.
// A copy of the GPL is included in the distribution
// package of this software, or see:
// 
//   http://www.gnu.org/copyleft/
//   
// ... for licensing details.
// 

#ifndef DRAWINGLABELMANAGER_INCLUDED
#define DRAWINGLABELMANAGER_INCLUDED

#include "ScriptCodes.h"
#include "UnicodeScript.h"
#include "Utf8String.h"
#include "LabelSet.h"
#include <string>
#include <map>

//
// For font metrics
// and Postscript output:
// 
#include "LASiWrapper.h"

//
// DrawingLabelManager
//
class DrawingLabelManager{
        
        
public:
        //
        // Constructor:
        //
        DrawingLabelManager();
        
        //
        // setLASiWrapper
        //
        void setLASiWrapper(LASiWrapper* plasiWrapper);
        //
        // setLabelSet
        //
        void setLabelSet(const LabelSet* labelSet);
        //
        // fitStringToLabelWidth():
        //
        std::string fitStringToLabelWidth(UTF8String label);
        
private:
        friend class DrawingLabelManagerLoader;
        
        //
        // The _latinBlock is basic Latin (ASCII):
        //
        static UnicodeScript _latinScript;
        
        //
        // The _aggregateBlock sample is sufficient for determining
        // good line spacing metrics for most Unicode blocks beyond basic Latin:
        // 
        static UnicodeScript _aggregatedScripts;
        //
        // The following set of _unicodeBlocks consists primarily of Indic and Indic-derived scripts
        // which have vowels or other diacritical marks both above and below the consonants
        // which requires greater inter-line spacing:
        //
        static std::map<SCRIPTCODE,UnicodeScript> _unicodeScripts;
        
        bool _hasUnicode;
        bool _hasIndicOrArabic;
        
        double _yMaximum;
        double _yMinimum;
        double _lineHeight;
        
        unsigned _labelCount;
        
        LASiWrapper* _pLASiWrapper;
};


//
// DrawingLabelManagerLoader 
// 
// is the Friend class that 
// initializes the DrawingLabel 
// class:
//
class DrawingLabelManagerLoader
{
public:
        static DrawingLabelManagerLoader drawingLabelManagerLoader;
        
        DrawingLabelManagerLoader();
        
};


#endif

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