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 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
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 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
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#ifndef INCLUDED_SDEXT_SOURCE_PRESENTER_PRESENTERFRAMEWORKOBSERVER_HXX
#define INCLUDED_SDEXT_SOURCE_PRESENTER_PRESENTERFRAMEWORKOBSERVER_HXX

#include <com/sun/star/drawing/framework/XConfigurationChangeListener.hpp>
#include <com/sun/star/drawing/framework/XConfigurationController.hpp>
#include <cppuhelper/basemutex.hxx>
#include <cppuhelper/compbase.hxx>

#include <functional>

namespace sdext { namespace presenter {

typedef ::cppu::WeakComponentImplHelper <
    css::drawing::framework::XConfigurationChangeListener
    > PresenterFrameworkObserverInterfaceBase;

/** Watch the drawing framework for changes and run callbacks when a certain
    change takes place.
*/
class PresenterFrameworkObserver
    : private ::cppu::BaseMutex,
      public PresenterFrameworkObserverInterfaceBase
{
public:
    typedef ::std::function<bool ()> Predicate;
    typedef ::std::function<void (bool)> Action;

    PresenterFrameworkObserver(const PresenterFrameworkObserver&) = delete;
    PresenterFrameworkObserver& operator=(const PresenterFrameworkObserver&) = delete;

    static void RunOnUpdateEnd (
        const css::uno::Reference<css::drawing::framework::XConfigurationController>&rxController,
        const Action& rAction);

    virtual void SAL_CALL disposing() override;
    virtual void SAL_CALL disposing (const css::lang::EventObject& rEvent) override;
    virtual void SAL_CALL notifyConfigurationChange (
        const css::drawing::framework::ConfigurationChangeEvent& rEvent) override;

private:
    css::uno::Reference<css::drawing::framework::XConfigurationController> mxConfigurationController;
    Predicate maPredicate;
    Action maAction;

    /** Create a new PresenterFrameworkObserver object.
        @param rsEventName
            An event name other than ConfigurationUpdateEnd.  When the
            observer shall only listen for ConfigurationUpdateEnd then pass
            an empty name.
        @param rPredicate
            This functor tests whether the action is to be executed or not.
        @param rAction
            The functor to execute when the predicate returns true,
            e.g. when some resource has been created.
    */
    PresenterFrameworkObserver (
        const css::uno::Reference<css::drawing::framework::XConfigurationController>&rxController,
        const OUString& rsEventName,
        const Predicate& rPredicate,
        const Action& rAction);
    virtual ~PresenterFrameworkObserver() override;

    void Shutdown();

    /** Predicate that always returns true.
    */
    static bool True();
};

} }  // end of namespace ::sdext::presenter

#endif

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