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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_ACTIVITYBASE_HXX
+#define INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_ACTIVITYBASE_HXX
+
+#include <animationactivity.hxx>
+#include "activityparameters.hxx"
+#include <animatableshape.hxx>
+#include <shapeattributelayer.hxx>
+
+namespace slideshow {
+namespace internal {
+
+/** Base class for animation activities.
+
+ This whole class hierarchy is only for code sharing
+ between the various specializations (with or without
+ key times, fully discrete, etc.).
+*/
+class ActivityBase : public AnimationActivity
+{
+public:
+ explicit ActivityBase( const ActivityParameters& rParms );
+
+ /// From Disposable interface
+ virtual void dispose() override;
+
+protected:
+ /** From Activity interface
+
+ Derived classes should override, call this first
+ and then perform their work.
+ */
+ virtual bool perform() override;
+ virtual double calcTimeLag() const override;
+ virtual bool isActive() const override;
+
+private:
+ virtual void dequeued() override;
+
+ // From AnimationActivity interface
+ virtual void setTargets(
+ const AnimatableShapeSharedPtr& rShape,
+ const ShapeAttributeLayerSharedPtr& rAttrLayer ) override;
+
+private:
+ /** Hook for derived classes
+
+ This method will be called from the first
+ perform() invocation, to signal the start of the
+ activity.
+ */
+ virtual void startAnimation() = 0;
+
+ /** Hook for derived classes
+
+ This method will be called after the last perform()
+ invocation, and after the potential changes of that
+ perform() call are committed to screen. That is, in
+ endAnimation(), the animation objects (sprites,
+ animation) can safely be destroyed, without causing
+ visible artifacts on screen.
+ */
+ virtual void endAnimation() = 0;
+
+protected:
+
+ /** End this activity, in a regular way.
+
+ This method is for derived classes needing to signal a
+ regular activity end (i.e. because the regular
+ duration is over)
+ */
+ void endActivity();
+
+ /** Modify fractional time.
+
+ This method modifies the fractional time (total
+ duration mapped to the [0,1] range) to the
+ effective simple time, but only according to
+ acceleration/deceleration.
+ */
+ double calcAcceleratedTime( double nT ) const;
+
+ bool isDisposed() const {
+ return (!mbIsActive && !mpEndEvent && !mpShape &&
+ !mpAttributeLayer);
+ }
+
+ EventQueue& getEventQueue() const { return mrEventQueue; }
+
+ const AnimatableShapeSharedPtr& getShape() const { return mpShape; }
+
+ const ShapeAttributeLayerSharedPtr& getShapeAttributeLayer() const
+ { return mpAttributeLayer; }
+
+ bool isRepeatCountValid() const { return bool(maRepeats); }
+ double getRepeatCount() const { return *maRepeats; }
+ bool isAutoReverse() const { return mbAutoReverse; }
+
+private:
+ /// Activity:
+ virtual void end() override;
+ virtual void performEnd() = 0;
+
+private:
+ EventSharedPtr mpEndEvent;
+ EventQueue& mrEventQueue;
+ AnimatableShapeSharedPtr mpShape; // only to pass on to animation
+ ShapeAttributeLayerSharedPtr mpAttributeLayer; // only to pass on to anim
+
+ ::std::optional<double> const maRepeats;
+ const double mnAccelerationFraction;
+ const double mnDecelerationFraction;
+
+ const bool mbAutoReverse;
+
+ // true, if perform() has not yet been called:
+ mutable bool mbFirstPerformCall;
+ bool mbIsActive;
+};
+
+} // namespace internal
+} // namespace presentation
+
+#endif // INCLUDED_SLIDESHOW_SOURCE_ENGINE_ACTIVITIES_ACTIVITYBASE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */