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/*
* Copyright (C) 2014 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "RemoteScrollingCoordinatorProxy.h"
#if ENABLE(ASYNC_SCROLLING)
#include "ArgumentCoders.h"
#include "MessageDecoder.h"
#include "MessageEncoder.h"
#include "RemoteLayerTreeDrawingAreaProxy.h"
#include "RemoteScrollingCoordinator.h"
#include "RemoteScrollingCoordinatorMessages.h"
#include "RemoteScrollingCoordinatorTransaction.h"
#include "WebPageProxy.h"
#include "WebProcessProxy.h"
#include <WebCore/ScrollingStateFrameScrollingNode.h>
#include <WebCore/ScrollingStateOverflowScrollingNode.h>
#include <WebCore/ScrollingStateTree.h>
#include <WebCore/ScrollingTreeScrollingNode.h>
using namespace WebCore;
namespace WebKit {
RemoteScrollingCoordinatorProxy::RemoteScrollingCoordinatorProxy(WebPageProxy& webPageProxy)
: m_webPageProxy(webPageProxy)
, m_scrollingTree(RemoteScrollingTree::create(*this))
, m_requestedScrollInfo(nullptr)
, m_propagatesMainFrameScrolls(true)
{
}
RemoteScrollingCoordinatorProxy::~RemoteScrollingCoordinatorProxy()
{
}
ScrollingNodeID RemoteScrollingCoordinatorProxy::rootScrollingNodeID() const
{
if (!m_scrollingTree->rootNode())
return 0;
return m_scrollingTree->rootNode()->scrollingNodeID();
}
const RemoteLayerTreeHost* RemoteScrollingCoordinatorProxy::layerTreeHost() const
{
DrawingAreaProxy* drawingArea = m_webPageProxy.drawingArea();
if (!is<RemoteLayerTreeDrawingAreaProxy>(drawingArea)) {
ASSERT_NOT_REACHED();
return nullptr;
}
RemoteLayerTreeDrawingAreaProxy& remoteDrawingArea = downcast<RemoteLayerTreeDrawingAreaProxy>(*drawingArea);
return &remoteDrawingArea.remoteLayerTreeHost();
}
void RemoteScrollingCoordinatorProxy::updateScrollingTree(const RemoteScrollingCoordinatorTransaction& transaction, RequestedScrollInfo& requestedScrollInfo)
{
m_requestedScrollInfo = &requestedScrollInfo;
// FIXME: There must be a better idiom for this.
std::unique_ptr<ScrollingStateTree> stateTree(const_cast<RemoteScrollingCoordinatorTransaction&>(transaction).scrollingStateTree().release());
const RemoteLayerTreeHost* layerTreeHost = this->layerTreeHost();
if (!layerTreeHost) {
ASSERT_NOT_REACHED();
return;
}
connectStateNodeLayers(*stateTree, *layerTreeHost);
m_scrollingTree->commitNewTreeState(WTFMove(stateTree));
m_requestedScrollInfo = nullptr;
}
#if !PLATFORM(IOS)
void RemoteScrollingCoordinatorProxy::connectStateNodeLayers(ScrollingStateTree& stateTree, const RemoteLayerTreeHost& layerTreeHost)
{
for (auto& currNode : stateTree.nodeMap().values()) {
if (currNode->hasChangedProperty(ScrollingStateNode::ScrollLayer))
currNode->setLayer(layerTreeHost.getLayer(currNode->layer()));
switch (currNode->nodeType()) {
case FrameScrollingNode: {
ScrollingStateFrameScrollingNode& scrollingStateNode = downcast<ScrollingStateFrameScrollingNode>(*currNode);
if (scrollingStateNode.hasChangedProperty(ScrollingStateFrameScrollingNode::ScrolledContentsLayer))
scrollingStateNode.setScrolledContentsLayer(layerTreeHost.getLayer(scrollingStateNode.scrolledContentsLayer()));
if (scrollingStateNode.hasChangedProperty(ScrollingStateFrameScrollingNode::CounterScrollingLayer))
scrollingStateNode.setCounterScrollingLayer(layerTreeHost.getLayer(scrollingStateNode.counterScrollingLayer()));
if (scrollingStateNode.hasChangedProperty(ScrollingStateFrameScrollingNode::InsetClipLayer))
scrollingStateNode.setInsetClipLayer(layerTreeHost.getLayer(scrollingStateNode.insetClipLayer()));
if (scrollingStateNode.hasChangedProperty(ScrollingStateFrameScrollingNode::ContentShadowLayer))
scrollingStateNode.setContentShadowLayer(layerTreeHost.getLayer(scrollingStateNode.contentShadowLayer()));
// FIXME: we should never have header and footer layers coming from the WebProcess.
if (scrollingStateNode.hasChangedProperty(ScrollingStateFrameScrollingNode::HeaderLayer))
scrollingStateNode.setHeaderLayer(layerTreeHost.getLayer(scrollingStateNode.headerLayer()));
if (scrollingStateNode.hasChangedProperty(ScrollingStateFrameScrollingNode::FooterLayer))
scrollingStateNode.setFooterLayer(layerTreeHost.getLayer(scrollingStateNode.footerLayer()));
break;
}
case OverflowScrollingNode: {
ScrollingStateOverflowScrollingNode& scrollingStateNode = downcast<ScrollingStateOverflowScrollingNode>(*currNode);
if (scrollingStateNode.hasChangedProperty(ScrollingStateOverflowScrollingNode::ScrolledContentsLayer))
scrollingStateNode.setScrolledContentsLayer(layerTreeHost.getLayer(scrollingStateNode.scrolledContentsLayer()));
break;
}
case FixedNode:
case StickyNode:
break;
}
}
}
#endif
bool RemoteScrollingCoordinatorProxy::handleWheelEvent(const PlatformWheelEvent& event)
{
ScrollingTree::EventResult result = m_scrollingTree->tryToHandleWheelEvent(event);
return result == ScrollingTree::DidHandleEvent; // FIXME: handle other values.
}
bool RemoteScrollingCoordinatorProxy::isPointInNonFastScrollableRegion(const IntPoint& p) const
{
return m_scrollingTree->isPointInNonFastScrollableRegion(p);
}
void RemoteScrollingCoordinatorProxy::viewportChangedViaDelegatedScrolling(ScrollingNodeID nodeID, const FloatRect& fixedPositionRect, double scale)
{
m_scrollingTree->viewportChangedViaDelegatedScrolling(nodeID, fixedPositionRect, scale);
}
void RemoteScrollingCoordinatorProxy::currentSnapPointIndicesDidChange(WebCore::ScrollingNodeID nodeID, unsigned horizontal, unsigned vertical)
{
m_webPageProxy.send(Messages::RemoteScrollingCoordinator::CurrentSnapPointIndicesChangedForNode(nodeID, horizontal, vertical));
}
// This comes from the scrolling tree.
void RemoteScrollingCoordinatorProxy::scrollingTreeNodeDidScroll(ScrollingNodeID scrolledNodeID, const FloatPoint& newScrollPosition, SetOrSyncScrollingLayerPosition scrollingLayerPositionAction)
{
// Scroll updates for the main frame are sent via WebPageProxy::updateVisibleContentRects()
// so don't send them here.
if (!m_propagatesMainFrameScrolls && scrolledNodeID == rootScrollingNodeID())
return;
#if PLATFORM(IOS)
m_webPageProxy.overflowScrollViewDidScroll();
#endif
m_webPageProxy.send(Messages::RemoteScrollingCoordinator::ScrollPositionChangedForNode(scrolledNodeID, newScrollPosition, scrollingLayerPositionAction));
}
void RemoteScrollingCoordinatorProxy::scrollingTreeNodeRequestsScroll(ScrollingNodeID scrolledNodeID, const FloatPoint& scrollPosition, bool representsProgrammaticScroll)
{
if (scrolledNodeID == rootScrollingNodeID() && m_requestedScrollInfo) {
m_requestedScrollInfo->requestsScrollPositionUpdate = true;
m_requestedScrollInfo->requestIsProgrammaticScroll = representsProgrammaticScroll;
m_requestedScrollInfo->requestedScrollPosition = scrollPosition;
}
}
} // namespace WebKit
#endif // ENABLE(ASYNC_SCROLLING)
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