libreoffice/framework/source/inc/dispatch/windowcommanddispatch.hxx

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#ifndef __FRAMEWORK_DISPATCH_WINDOWCOMMANDDISPATCH_HXX_
#define __FRAMEWORK_DISPATCH_WINDOWCOMMANDDISPATCH_HXX_

//_______________________________________________
// my own includes

#include <threadhelp/threadhelpbase.hxx>

//_______________________________________________
// interface includes

#include <com/sun/star/awt/XWindow.hpp>
#include <com/sun/star/frame/XFrame.hpp>
#include <com/sun/star/lang/XEventListener.hpp>
#include <com/sun/star/lang/XMultiServiceFactory.hpp>

//_______________________________________________
// other includes

#include <cppuhelper/implbase1.hxx>
#include <tools/link.hxx>

//_______________________________________________
// namespace

namespace framework{

namespace css = ::com::sun::star;

//_______________________________________________
// exported const

//_______________________________________________
// exported definitions

/** @short  internal helper to bind e.g. MAC-Menu events to our internal dispatch API.

    @descr  On e.g. MAC platform system menus are merged together with some fix entries as
            e.g. "Pereferences" or "About". These menu entries trigger hard coded commands.
            Here we map these commands to the right URLs and dispatch them.

            This helper knows a frame and it's container window (where VCL provide the hard coded
            commands). We hold those objects weak ... so there is no need to react for complex dispose/ing()
            scenarios. On the other side VCL does not hold us alive (because it doesn't know our UNO reference).
            So we register us at the XWindow as event listener also to be sure to live as long the XWindow/VCLWindow lives.
 */
class WindowCommandDispatch : private ThreadHelpBase
                  , public  ::cppu::WeakImplHelper1< css::lang::XEventListener >
{
    //___________________________________________
    // const

    private:

        /// dispatch URL to trigger our "Tools->Options" dialog
        static const ::rtl::OUString COMMAND_PREFERENCES;

        /// dispatch URL to trigger our About box
        static const ::rtl::OUString COMMAND_ABOUTBOX;

    //___________________________________________
    // member

    private:

        /// can be used to create own needed services on demand.
        css::uno::Reference< css::lang::XMultiServiceFactory > m_xSMGR;

        /// knows the frame, where we dispatch our commands as weak reference
        css::uno::WeakReference< css::frame::XFrame > m_xFrame;

        /// knows the VCL window (where the hard coded commands occured) as weak XWindow reference
        css::uno::WeakReference< css::awt::XWindow > m_xWindow;

    //___________________________________________
    // native interface

    public:

        //_______________________________________

        /** @short  creates a new instance and initialize it with all necessary parameters.

            @descr  Every instance of such MACDispatch can be used for the specified context only.
                    Means: 1 MACDispatch object is bound to 1 Frame/Window pair in which context
                    the detected commands will be executed.

            @param  xSMGR
                    will be used to create own needed services on demand.

            @param  xFrame
                    used as for new detected commands.
         */
        WindowCommandDispatch(const css::uno::Reference< css::lang::XMultiServiceFactory >& xSMGR ,
                              const css::uno::Reference< css::frame::XFrame >&              xFrame);

        //_______________________________________

        /** @short  used to free internal resources.
         */
        virtual ~WindowCommandDispatch();

    //___________________________________________
    // uno interface

    public:

        // XEventListener
         virtual void SAL_CALL disposing(const css::lang::EventObject& aSource)
            throw (css::uno::RuntimeException);

    //___________________________________________
    // implementation

    private:

        //_______________________________________

        /** @short  establish all listener connections we need.

            @descr  Those listener connections will be created one times only (see ctor).
                    Afterwards we listen for incoming events till our referred frame/window pair
                    will be closed. All objects die by refcount automatically. Because we hold
                    it weak ...
         */
        void impl_startListening();

        //_______________________________________

        /** @short  callback from VCL to notify new commands
         */
        DECL_LINK( impl_notifyCommand, void* );

        //_______________________________________

        /** @short  dispatch right command URLs into our frame context.

            @param  sCommand
                    the command for dispatch
         */
        void impl_dispatchCommand(const ::rtl::OUString& sCommand);

}; // class MACDispatch

} // namespace framework

#endif // #ifndef __FRAMEWORK_DISPATCH_MACDISPATCH_HXX_

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