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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 .
+ */
+
+
+#include "effectrewinder.hxx"
+#include <eventqueue.hxx>
+#include <usereventqueue.hxx>
+#include <basecontainernode.hxx>
+#include <delayevent.hxx>
+
+#include <com/sun/star/animations/Event.hpp>
+#include <com/sun/star/animations/EventTrigger.hpp>
+#include <com/sun/star/container/XEnumerationAccess.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+
+using ::com::sun::star::uno::Reference;
+using namespace ::com::sun::star;
+
+namespace slideshow::internal {
+
+
+namespace {
+
+class RewinderEventHandler : public EventHandler
+{
+public:
+ typedef ::std::function<bool ()> Action;
+ explicit RewinderEventHandler (const Action& rAction) : maAction(rAction) {}
+
+private:
+ const Action maAction;
+ virtual bool handleEvent() override { return maAction(); }
+};
+
+
+class RewinderAnimationEventHandler : public AnimationEventHandler
+{
+public:
+ typedef ::std::function<bool (const AnimationNodeSharedPtr& rpNode)> Action;
+ explicit RewinderAnimationEventHandler (const Action& rAction) : maAction(rAction) {}
+
+private:
+ const Action maAction;
+ virtual bool handleAnimationEvent (const AnimationNodeSharedPtr& rpNode) override
+ { return maAction(rpNode); }
+};
+
+
+} // end of anonymous namespace
+
+
+//----- EffectRewinder --------------------------------------------------------------
+
+EffectRewinder::EffectRewinder (
+ EventMultiplexer& rEventMultiplexer,
+ EventQueue& rEventQueue,
+ UserEventQueue& rUserEventQueue)
+ : mrEventMultiplexer(rEventMultiplexer),
+ mrEventQueue(rEventQueue),
+ mrUserEventQueue(rUserEventQueue),
+ mpSlideStartHandler(),
+ mpSlideEndHandler(),
+ mpAnimationStartHandler(),
+ mnMainSequenceEffectCount(0),
+ mpAsynchronousRewindEvent(),
+ mxCurrentAnimationRootNode(),
+ mxCurrentSlide(),
+ mbNonUserTriggeredMainSequenceEffectSeen(false),
+ mbHasAdvancedTimeSetting(false)
+{
+ initialize();
+}
+
+
+void EffectRewinder::initialize()
+{
+ // Add some event handlers so that we are informed when
+ // a) an animation is started (we then check whether that belongs to a
+ // main sequence effect and if so, increase the respective counter),
+ // b,c) a slide was started or ended (in which case the effect counter
+ // is reset.
+
+ mpAnimationStartHandler =
+ std::make_shared<RewinderAnimationEventHandler>(
+ [this]( const AnimationNodeSharedPtr& pNode)
+ { return this->notifyAnimationStart( pNode ); } );
+ mrEventMultiplexer.addAnimationStartHandler(mpAnimationStartHandler);
+
+ mpSlideStartHandler =
+ std::make_shared<RewinderEventHandler>(
+ [this]() { return this->resetEffectCount(); } );
+ mrEventMultiplexer.addSlideStartHandler(mpSlideStartHandler);
+
+ mpSlideEndHandler =
+ std::make_shared<RewinderEventHandler>(
+ [this]() { return this->resetEffectCount(); } );
+ mrEventMultiplexer.addSlideEndHandler(mpSlideEndHandler);
+}
+
+
+EffectRewinder::~EffectRewinder()
+{
+ dispose();
+}
+
+
+void EffectRewinder::dispose()
+{
+ if (mpAsynchronousRewindEvent)
+ {
+ mpAsynchronousRewindEvent->dispose();
+ mpAsynchronousRewindEvent.reset();
+ }
+
+ if (mpAnimationStartHandler)
+ {
+ mrEventMultiplexer.removeAnimationStartHandler(mpAnimationStartHandler);
+ mpAnimationStartHandler.reset();
+ }
+
+ if (mpSlideStartHandler)
+ {
+ mrEventMultiplexer.removeSlideStartHandler(mpSlideStartHandler);
+ mpSlideStartHandler.reset();
+ }
+
+ if (mpSlideEndHandler)
+ {
+ mrEventMultiplexer.removeSlideEndHandler(mpSlideEndHandler);
+ mpSlideEndHandler.reset();
+ }
+}
+
+
+void EffectRewinder::setRootAnimationNode (
+ const uno::Reference<animations::XAnimationNode>& xRootNode)
+{
+ mxCurrentAnimationRootNode = xRootNode;
+}
+
+void EffectRewinder::setCurrentSlide (
+ const uno::Reference<drawing::XDrawPage>& xSlide)
+{
+ mxCurrentSlide = xSlide;
+
+ // Check if the current slide has advance time setting or not
+ uno::Reference< beans::XPropertySet > xPropSet( mxCurrentSlide, uno::UNO_QUERY );
+ sal_Int32 nChange(0);
+
+ if( xPropSet.is())
+ getPropertyValue( nChange, xPropSet, "Change");
+
+ mbHasAdvancedTimeSetting = nChange;
+}
+
+bool EffectRewinder::rewind (
+ const ::std::shared_ptr<ScreenUpdater::UpdateLock>& rpPaintLock,
+ const ::std::function<void ()>& rSlideRewindFunctor,
+ const ::std::function<void ()>& rPreviousSlideFunctor)
+{
+ mpPaintLock = rpPaintLock;
+
+ // Do not allow nested rewinds.
+ if (mpAsynchronousRewindEvent)
+ {
+ OSL_ASSERT( ! mpAsynchronousRewindEvent);
+ return false;
+ }
+
+ // Abort (and skip over the rest of) any currently active animation.
+ mrUserEventQueue.callSkipEffectEventHandler();
+
+ if (!mbHasAdvancedTimeSetting)
+ mrEventQueue.forceEmpty();
+
+ const int nSkipCount (mnMainSequenceEffectCount - 1);
+ if (nSkipCount < 0)
+ {
+ if ( ! rPreviousSlideFunctor)
+ {
+ OSL_ASSERT(rPreviousSlideFunctor);
+ return false;
+ }
+
+ // No main sequence effects to rewind on the current slide.
+ // Go back to the previous slide.
+ mpAsynchronousRewindEvent = makeEvent(
+ ::std::bind(
+ &EffectRewinder::asynchronousRewindToPreviousSlide,
+ this,
+ rPreviousSlideFunctor),
+ "EffectRewinder::asynchronousRewindToPreviousSlide");
+ }
+ else
+ {
+ // The actual rewinding is done asynchronously so that we can safely
+ // call other methods.
+ mpAsynchronousRewindEvent = makeEvent(
+ ::std::bind(
+ &EffectRewinder::asynchronousRewind,
+ this,
+ nSkipCount,
+ true,
+ rSlideRewindFunctor),
+ "EffectRewinder::asynchronousRewind");
+ }
+
+ if (mpAsynchronousRewindEvent)
+ mrEventQueue.addEvent(mpAsynchronousRewindEvent);
+
+ return bool(mpAsynchronousRewindEvent);
+}
+
+
+void EffectRewinder::skipAllMainSequenceEffects()
+{
+ // Do not allow nested rewinds.
+ if (mpAsynchronousRewindEvent)
+ {
+ OSL_ASSERT(!mpAsynchronousRewindEvent);
+ return;
+ }
+
+ const int nTotalMainSequenceEffectCount (countMainSequenceEffects());
+ mpAsynchronousRewindEvent = makeEvent(
+ ::std::bind(
+ &EffectRewinder::asynchronousRewind,
+ this,
+ nTotalMainSequenceEffectCount,
+ false,
+ ::std::function<void ()>()),
+ "EffectRewinder::asynchronousRewind");
+ mrEventQueue.addEvent(mpAsynchronousRewindEvent);
+}
+
+
+sal_Int32 EffectRewinder::countMainSequenceEffects()
+{
+ // Determine the number of main sequence effects.
+ sal_Int32 nMainSequenceNodeCount (0);
+
+ ::std::queue<uno::Reference<animations::XAnimationNode> > aNodeQueue;
+ aNodeQueue.push(mxCurrentAnimationRootNode);
+ while ( ! aNodeQueue.empty())
+ {
+ const uno::Reference<animations::XAnimationNode> xNode (aNodeQueue.front());
+ aNodeQueue.pop();
+
+ // Does the current node belong to the main sequence?
+ if (xNode.is())
+ {
+ animations::Event aEvent;
+ if (xNode->getBegin() >>= aEvent)
+ if (aEvent.Trigger == animations::EventTrigger::ON_NEXT)
+ ++nMainSequenceNodeCount;
+ }
+
+ // If the current node is a container then prepare its children for investigation.
+ uno::Reference<container::XEnumerationAccess> xEnumerationAccess (xNode, uno::UNO_QUERY);
+ if (xEnumerationAccess.is())
+ {
+ uno::Reference<container::XEnumeration> xEnumeration (
+ xEnumerationAccess->createEnumeration());
+ if (xEnumeration.is())
+ while (xEnumeration->hasMoreElements())
+ {
+ aNodeQueue.push(
+ uno::Reference<animations::XAnimationNode>(
+ xEnumeration->nextElement(), uno::UNO_QUERY));
+ }
+ }
+ }
+
+ return nMainSequenceNodeCount;
+}
+
+
+void EffectRewinder::skipSingleMainSequenceEffects()
+{
+ // This basically just starts the next effect and then skips over its
+ // animation.
+ mrEventMultiplexer.notifyNextEffect();
+ mrEventQueue.forceEmpty();
+ mrUserEventQueue.callSkipEffectEventHandler();
+ mrEventQueue.forceEmpty();
+}
+
+
+bool EffectRewinder::resetEffectCount()
+{
+ mnMainSequenceEffectCount = 0;
+ return false;
+}
+
+
+bool EffectRewinder::notifyAnimationStart (const AnimationNodeSharedPtr& rpNode)
+{
+ // This notification is only relevant for us when the rpNode belongs to
+ // the main sequence.
+ BaseNodeSharedPtr pBaseNode (::std::dynamic_pointer_cast<BaseNode>(rpNode));
+ if ( ! pBaseNode)
+ return false;
+
+ BaseContainerNodeSharedPtr pParent (pBaseNode->getParentNode());
+ if ( ! (pParent && pParent->isMainSequenceRootNode()))
+ return false;
+
+ // This notification is only relevant for us when the effect is user
+ // triggered.
+ bool bIsUserTriggered (false);
+
+ Reference<animations::XAnimationNode> xNode (rpNode->getXAnimationNode());
+ if (xNode.is())
+ {
+ animations::Event aEvent;
+ if (xNode->getBegin() >>= aEvent)
+ bIsUserTriggered = (aEvent.Trigger == animations::EventTrigger::ON_NEXT);
+ }
+
+ if (bIsUserTriggered)
+ ++mnMainSequenceEffectCount;
+ else
+ mbNonUserTriggeredMainSequenceEffectSeen = true;
+
+ return false;
+}
+
+
+void EffectRewinder::asynchronousRewind (
+ sal_Int32 nEffectCount,
+ const bool bRedisplayCurrentSlide,
+ const std::function<void ()>& rSlideRewindFunctor)
+{
+ OSL_ASSERT(mpAsynchronousRewindEvent);
+
+ if (bRedisplayCurrentSlide)
+ {
+ mpPaintLock->Activate();
+ // Re-display the current slide.
+ if (rSlideRewindFunctor)
+ rSlideRewindFunctor();
+ mpAsynchronousRewindEvent = makeEvent(
+ ::std::bind(
+ &EffectRewinder::asynchronousRewind,
+ this,
+ nEffectCount,
+ false,
+ rSlideRewindFunctor),
+ "EffectRewinder::asynchronousRewind");
+ mrEventQueue.addEvent(mpAsynchronousRewindEvent);
+ }
+ else
+ {
+ // Process initial events and skip any animations that are started
+ // when the slide is shown.
+ mbNonUserTriggeredMainSequenceEffectSeen = false;
+
+ if (!mbHasAdvancedTimeSetting)
+ mrEventQueue.forceEmpty();
+
+ if (mbNonUserTriggeredMainSequenceEffectSeen)
+ {
+ mrUserEventQueue.callSkipEffectEventHandler();
+ mrEventQueue.forceEmpty();
+ }
+
+ while (--nEffectCount >= 0)
+ skipSingleMainSequenceEffects();
+
+ mpAsynchronousRewindEvent.reset();
+ mpPaintLock.reset();
+ }
+}
+
+
+void EffectRewinder::asynchronousRewindToPreviousSlide (
+ const ::std::function<void ()>& rSlideRewindFunctor)
+{
+ OSL_ASSERT(mpAsynchronousRewindEvent);
+
+ mpAsynchronousRewindEvent.reset();
+ rSlideRewindFunctor();
+}
+
+
+} // end of namespace ::slideshow::internal
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */