xref: /aoo42x/main/svx/source/accessibility/AccessibleEmptyEditSource.hxx (revision cdf0e10c)

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#ifndef _SVX_ACCESSIBLEEMPTYEDITSOURCE_HXX
#define _SVX_ACCESSIBLEEMPTYEDITSOURCE_HXX

#include <svl/brdcst.hxx>
#include <svl/lstner.hxx>

#include <memory>
#include <editeng/unoedsrc.hxx>

class SdrObject;
class SdrView;
class Window;

namespace accessibility
{
    /** Proxy edit source for shapes without text

    	Extracted from old SvxDummyEditSource
     */
    class AccessibleEmptyEditSource : public SvxEditSource, public SfxListener, public SfxBroadcaster
    {
    public:
        /** Create proxy edit source for shapes without text

        	Since the views don't broadcast their dying, make sure that
            this object gets destroyed if the view becomes invalid

            The window is necessary, since our views can display on multiple windows

            Make sure you only create such an object if the shape _really_
            does not contain text.
        */
        AccessibleEmptyEditSource(	SdrObject& rObj, SdrView& rView, const Window& rViewWindow );
        ~AccessibleEmptyEditSource();

        // from the SvxEditSource interface
        SvxTextForwarder*		GetTextForwarder();
        SvxViewForwarder*		GetViewForwarder();

        SvxEditSource*			Clone() const;

        // this method internally switches from empty to proxy mode,
        // creating an SvxTextEditSource for the functionality.
        SvxEditViewForwarder*	GetEditViewForwarder( sal_Bool bCreate = sal_False );

        void					UpdateData();
        SfxBroadcaster&			GetBroadcaster() const;

        // from the SfxListener interface
        void					Notify( SfxBroadcaster& rBC, const SfxHint& rHint );

    private:
        void Switch2ProxyEditSource();

        /** Pointer to edit source implementation. This is switched on
            a GetEditViewForwarder( true ) call, to actually create a
            SvxTextEditSource.

            @dyn
         */
        std::auto_ptr< SvxEditSource > 	mpEditSource;

        SdrObject& 						mrObj;
        SdrView& 						mrView;
        const Window& 					mrViewWindow;

        bool							mbEditSourceEmpty;
    };

} // namespace accessibility

#endif