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diff --git a/slideshow/source/inc/animationnode.hxx b/slideshow/source/inc/animationnode.hxx
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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_INC_ANIMATIONNODE_HXX
+#define INCLUDED_SLIDESHOW_SOURCE_INC_ANIMATIONNODE_HXX
+
+#include "disposable.hxx"
+
+#include <com/sun/star/animations/XAnimationNode.hpp>
+#include <memory>
+
+
+namespace slideshow {
+namespace internal {
+
+class AnimationNode;
+typedef ::std::shared_ptr< AnimationNode > AnimationNodeSharedPtr;
+
+/** This interface is used to mirror every XAnimateNode object
+    in the presentation core.
+*/
+class AnimationNode : public Disposable
+{
+public:
+    /** The current state of this AnimationNode
+     */
+    enum NodeState {
+        /// Invalid state, node is disposed or otherwise invalid
+        INVALID      =0,
+        /// Unresolved start time
+        UNRESOLVED   =1,
+        /// Resolved start time, node will start eventually
+        RESOLVED     =2,
+        /// Node is active
+        ACTIVE       =4,
+        /// Node is frozen (no longer active, but changes remain in place)
+        FROZEN       =8,
+        /// Node has completed an active lifecycle,
+        /// and any effect is removed from the document
+        ENDED       =16
+    };
+
+    /** Query the corresponding XAnimationNode.
+     */
+    virtual css::uno::Reference< css::animations::XAnimationNode >
+    getXAnimationNode() const = 0;
+
+    /** Init this node
+
+        If this node is not in state INVALID, init() sets up the
+        node state and schedules necessary events.
+        If this node has children, they have their init() called, too.
+        You will call this method whenever a slide is going to be
+        shown.
+
+        @return true, if init was successful; state has changed to UNRESOLVED
+    */
+    virtual bool init() = 0;
+
+    /** Resolve node start time
+
+        Nodes can have unresolved start times, i.e. indefinite
+        start time for container nodes, or child nodes whose
+        parent has not yet started. Calling this method fixes
+        the node's start time. This does not mean that this
+        node immediately starts its animations, that is only
+        the case for begin=0.0. The node will change its state
+        to RESOLVED.
+
+        @return true, if a start event was successfully scheduled.
+    */
+    virtual bool resolve() = 0;
+
+    /** Immediately start this node
+
+        This method starts the animation on this node, without
+        begin timeout. The node will change its state to ACTIVE.
+    */
+    virtual void activate() = 0;
+
+    /** Immediately stop this node
+
+        This method stops the animation on this node. The node
+        will change its state to either ENDED or FROZEN,
+        depending on XAnimationNode attributes.
+    */
+    virtual void deactivate() = 0;
+
+    /** End the animation on this node
+
+        This method force-ends animation on this node. Parents
+        may call this for their children, if their active
+        duration ends. An ended animation will no longer have
+        any effect on the shape attributes. The node will
+        change its state to ENDED.
+    */
+    virtual void end() = 0;
+
+    /** Query node state
+
+        @return the current state of this animation node.
+    */
+    virtual NodeState getState() const = 0;
+
+    /** Register a deactivating listener
+
+        This method registers another AnimationNode as an
+        deactivating listener, which gets notified via a
+        notifyDeactivating() call. The node calls all
+        registered listener, when it leaves the ACTIVE state.
+
+        @param rNotifee AnimationNode to notify
+    */
+    virtual bool registerDeactivatingListener(
+        const AnimationNodeSharedPtr& rNotifee ) = 0;
+
+    /** Called to notify another AnimationNode's deactivation
+
+        @param rNotifier The instance who calls this method.
+    */
+    virtual void notifyDeactivating(
+        const AnimationNodeSharedPtr& rNotifier ) = 0;
+
+    /** Called by the container to remove the animation effect
+        to make the painted shape correct if it restart because
+        of repeat or rewind ( fill mode is AnimationFill::REMOVE )
+        to start state.
+    */
+    virtual void removeEffect() = 0;
+
+    /** Query node whether it has an animation pending.
+
+        @return true, if this node (or at least one of its children)
+        has an animation pending. Used to determine if the main
+        sequence is actually empty, or contains effects
+    */
+    virtual bool hasPendingAnimation() const = 0;
+};
+
+} // namespace internal
+} // namespace presentation
+
+#endif // INCLUDED_SLIDESHOW_SOURCE_INC_ANIMATIONNODE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */