// $Revision: 1.3 $
// Copyright (C) 1994-1995 Taligent, Inc. All rights reserved.

#ifndef TaligentSamples_SAMPLESELECTTEXTINTERACTOR
#define TaligentSamples_SAMPLESELECTTEXTINTERACTOR

#ifndef Taligent_TEXTVIEW
#include <Taligent/TextView.h>
#endif

#ifndef Taligent_TEXTMODEL
#include <Taligent/TextModel.h>
#endif

#ifndef Taligent_BREAKWORD
#include <Taligent/BreakWord.h>
#endif

#ifndef Taligent_INPUT
#include <Taligent/Input.h> //  TInteractor
#endif

#ifndef Taligent_MOUSEINPUT
#include <Taligent/MouseInput.h>
#endif

#ifndef Taligent_INSERTIONOFFSET
#include <Taligent/InsertionOffset.h>
#endif

class TSelectState;
class TSampleSelectTextInteractor;

#if 0
class TSampleSelectTextInteractor : public TInteractor, public MMouseEventHandler {
#else
    class TSampleSelectTextInteractor : public TSelectTextInteractor {
#endif

public :    
    MCollectibleDeclarationsMacro(TSampleSelectTextInteractor);

                            TSampleSelectTextInteractor(TTextView*);
                            TSampleSelectTextInteractor(const TSampleSelectTextInteractor&);
    virtual                 ~TSampleSelectTextInteractor();

    virtual bool            MouseDown(TMouseDownEvent&);
    virtual bool            MouseMoved(TMouseMovedEvent&);
    virtual bool            MouseUp(TMouseUpEvent&);
    
protected: 
                            TSampleSelectTextInteractor();

    virtual void            Setup(TMouseDownEvent& mouseDown);

private:
    TTextView*              fView;
    TTextOffset             fLastOffset;
    TSelectState*           fSelectState;
};

// Base class to manage the selection state while tracking.  If constructed with a NIL
// computeselection returns the insertion offset, otherwise it uses the iterator to
// return the current range at the insertion offset.

class TSelectState {
public:
    TaligentTypeExtensionDeclarationsMacro_Abstract(TSelectState)

                        TSelectState(MTextRepresentation*, TTextChunkIteratorReference&);
    virtual             ~TSelectState();
    
    virtual void        Setup(const TInsertionOffset& initialOffset, const TTextArea& currentArea) = 0;
    virtual void        Track(const TInsertionOffset& trackingOffset, TTextArea& resultArea) = 0;
    
protected:
    virtual void        ComputeSelection(const TInsertionOffset&, TTextArea&);

private:
                        TSelectState(const TSelectState&);
    TSelectState&       operator=(const TSelectState&);
                        
    TTextRepresentationReadEntry fReadEntry;
    TTextChunkIterator* fChunkIterator;
};

#endif // TaligentSamples_SAMPLESELECTTEXTINTERACTOR