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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::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+ /// Node is frozen (no longer active, but changes remain in place)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 presentation::internal
+
+#endif // INCLUDED_SLIDESHOW_SOURCE_INC_ANIMATIONNODE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */