// $Revision: 1.4 $
// Copyright (c) 1994-1995 Taligent, Inc.  All rights reserved.

#ifndef TaligentSamples_STANDARDSELECTSTATES
#define TaligentSamples_STANDARDSELECTSTATES

#ifndef TaligentSamples_SELECTTEXTINTERACTOR
#include "SampleSelectTextInteractor.h"
#endif

// This sets the anchor to be a selection computed from the initial offset, the initial area 
// is ignored.  Tracking extends the selection from the anchor to the tracking offset.

class TSetSelectState : public TSelectState {
public:
    TaligentTypeExtensionDeclarationsMacro_Abstract(TSetSelectState)

                    TSetSelectState(MTextRepresentation*, TTextChunkIteratorReference&);
    virtual         ~TSetSelectState();

    virtual void    Setup(const TInsertionOffset& initialOffset, const TTextArea& initialArea);
    virtual void    Track(const TInsertionOffset& trackingOffset, TTextArea& resultArea);
    
protected:
    virtual void    SetAnchor(const TTextArea&);
    virtual void    ExtendArea(TTextArea&);

private:
    TTextArea       fAnchor;
};

// This computes the anchor to be the end of the initial selection furthest from the
// initial offset.

class TExtendSelectState : public TSetSelectState {
public:
    TaligentTypeExtensionDeclarationsMacro_Abstract(TExtendSelectState)

                    TExtendSelectState(MTextRepresentation*, TTextChunkIteratorReference&);
    virtual         ~TExtendSelectState();
    
    virtual void    Setup(const TInsertionOffset& initialOffset, const TTextArea& initialArea);
};

#endif // TaligentSamples_STANDARDSELECTSTATES