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/*
* Copyright (C) 2012, 2014-2015 Apple Inc. All rights reserved.
* Copyright (C) 2019, 2024 Igalia S.L.
*
* 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* HOLDER OR 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 "ScrollingTreeFrameScrollingNodeCoordinated.h"
#if ENABLE(ASYNC_SCROLLING) && USE(COORDINATED_GRAPHICS)
#include "CoordinatedPlatformLayer.h"
#include "LocalFrameView.h"
#include "Logging.h"
#include "ScrollingStateFrameScrollingNode.h"
#include "ScrollingThread.h"
#include "ScrollingTreeScrollingNodeDelegateCoordinated.h"
#include "ThreadedScrollingTree.h"
namespace WebCore {
Ref<ScrollingTreeFrameScrollingNode> ScrollingTreeFrameScrollingNodeCoordinated::create(ScrollingTree& scrollingTree, ScrollingNodeType nodeType, ScrollingNodeID nodeID)
{
return adoptRef(*new ScrollingTreeFrameScrollingNodeCoordinated(scrollingTree, nodeType, nodeID));
}
ScrollingTreeFrameScrollingNodeCoordinated::ScrollingTreeFrameScrollingNodeCoordinated(ScrollingTree& scrollingTree, ScrollingNodeType nodeType, ScrollingNodeID nodeID)
: ScrollingTreeFrameScrollingNode(scrollingTree, nodeType, nodeID)
{
m_delegate = makeUnique<ScrollingTreeScrollingNodeDelegateCoordinated>(*this, downcast<ThreadedScrollingTree>(scrollingTree).scrollAnimatorEnabled());
}
ScrollingTreeFrameScrollingNodeCoordinated::~ScrollingTreeFrameScrollingNodeCoordinated() = default;
ScrollingTreeScrollingNodeDelegateCoordinated& ScrollingTreeFrameScrollingNodeCoordinated::delegate() const
{
return *static_cast<ScrollingTreeScrollingNodeDelegateCoordinated*>(m_delegate.get());
}
bool ScrollingTreeFrameScrollingNodeCoordinated::commitStateBeforeChildren(const ScrollingStateNode& stateNode)
{
if (!ScrollingTreeFrameScrollingNode::commitStateBeforeChildren(stateNode))
return false;
if (!is<ScrollingStateFrameScrollingNode>(stateNode))
return false;
const auto& scrollingStateNode = downcast<ScrollingStateFrameScrollingNode>(stateNode);
if (scrollingStateNode.hasChangedProperty(ScrollingStateNode::Property::RootContentsLayer))
m_rootContentsLayer = static_cast<CoordinatedPlatformLayer*>(scrollingStateNode.rootContentsLayer());
if (scrollingStateNode.hasChangedProperty(ScrollingStateNode::Property::CounterScrollingLayer))
m_counterScrollingLayer = static_cast<CoordinatedPlatformLayer*>(scrollingStateNode.counterScrollingLayer());
if (scrollingStateNode.hasChangedProperty(ScrollingStateNode::Property::InsetClipLayer))
m_insetClipLayer = static_cast<CoordinatedPlatformLayer*>(scrollingStateNode.insetClipLayer());
if (scrollingStateNode.hasChangedProperty(ScrollingStateNode::Property::ContentShadowLayer))
m_contentShadowLayer = static_cast<CoordinatedPlatformLayer*>(scrollingStateNode.contentShadowLayer());
if (scrollingStateNode.hasChangedProperty(ScrollingStateNode::Property::HeaderLayer))
m_headerLayer = static_cast<CoordinatedPlatformLayer*>(scrollingStateNode.headerLayer());
if (scrollingStateNode.hasChangedProperty(ScrollingStateNode::Property::FooterLayer))
m_footerLayer = static_cast<CoordinatedPlatformLayer*>(scrollingStateNode.footerLayer());
m_delegate->updateFromStateNode(scrollingStateNode);
return true;
}
WheelEventHandlingResult ScrollingTreeFrameScrollingNodeCoordinated::handleWheelEvent(const PlatformWheelEvent& wheelEvent, EventTargeting eventTargeting)
{
if (!canHandleWheelEvent(wheelEvent, eventTargeting))
return WheelEventHandlingResult::unhandled();
bool handled = delegate().handleWheelEvent(wheelEvent);
delegate().updateSnapScrollState();
return WheelEventHandlingResult::result(handled);
}
void ScrollingTreeFrameScrollingNodeCoordinated::currentScrollPositionChanged(ScrollType scrollType, ScrollingLayerPositionAction action)
{
LOG_WITH_STREAM(Scrolling, stream << "ScrollingTreeFrameScrollingNodeCoordinated::currentScrollPositionChanged to " << currentScrollPosition() << " min: " << minimumScrollPosition() << " max: " << maximumScrollPosition() << " sync: " << hasSynchronousScrollingReasons());
ScrollingTreeFrameScrollingNode::currentScrollPositionChanged(scrollType, hasSynchronousScrollingReasons() ? ScrollingLayerPositionAction::Set : action);
}
void ScrollingTreeFrameScrollingNodeCoordinated::repositionScrollingLayers()
{
auto* scrollLayer = static_cast<CoordinatedPlatformLayer*>(scrolledContentsLayer());
if (!scrollLayer)
return;
// If we're committing on the scrolling thread, it means that ThreadedScrollingTree is in "desynchronized" mode.
// The main thread may already have set the same layer position, but here we need to trigger a scrolling thread composition
// to ensure that the scroll happens even when the main thread commit is taking a long time. So make sure the layer property
// changes when there has been a scroll position change.
CoordinatedPlatformLayer::ForcePositionSync forceSync = ScrollingThread::isCurrentThread() && !scrollingTree()->isScrollingSynchronizedWithMainThread() ?
CoordinatedPlatformLayer::ForcePositionSync::Yes : CoordinatedPlatformLayer::ForcePositionSync::No;
auto scrollPosition = currentScrollPosition();
scrollLayer->setPositionForScrolling(-scrollPosition, forceSync);
}
void ScrollingTreeFrameScrollingNodeCoordinated::repositionRelatedLayers()
{
auto scrollPosition = currentScrollPosition();
auto layoutViewport = this->layoutViewport();
if (m_counterScrollingLayer)
m_counterScrollingLayer->setPositionForScrolling(layoutViewport.location());
auto contentInsets = obscuredContentInsets();
if (m_insetClipLayer && m_rootContentsLayer) {
FloatPoint insetClipPosition;
{
Locker locker { m_insetClipLayer->lock() };
insetClipPosition = LocalFrameView::positionForInsetClipLayer(scrollPosition, contentInsets);
}
m_insetClipLayer->setPositionForScrolling(insetClipPosition);
auto rootContentsPosition = LocalFrameView::positionForRootContentLayer(scrollPosition, scrollOrigin(), contentInsets, headerHeight());
m_rootContentsLayer->setPositionForScrolling(rootContentsPosition);
if (m_contentShadowLayer)
m_contentShadowLayer->setPositionForScrolling(rootContentsPosition);
}
if (m_headerLayer || m_footerLayer) {
// Generally the banners should have the same horizontal-position computation as a fixed element. However,
// the banners are not affected by the frameScaleFactor(), so if there is currently a non-1 frameScaleFactor()
// then we should recompute layoutViewport.x() for the banner with a scale factor of 1.
float horizontalScrollOffsetForBanner = layoutViewport.x();
if (m_headerLayer)
m_headerLayer->setPositionForScrolling(FloatPoint(horizontalScrollOffsetForBanner, LocalFrameView::yPositionForHeaderLayer(scrollPosition, contentInsets.top())));
if (m_footerLayer)
m_footerLayer->setPositionForScrolling(FloatPoint(horizontalScrollOffsetForBanner, LocalFrameView::yPositionForFooterLayer(scrollPosition, contentInsets.top(), totalContentsSize().height(), footerHeight())));
}
delegate().updateVisibleLengths();
}
} // namespace WebCore
#endif // ENABLE(ASYNC_SCROLLING) && USE(COORDINATED_GRAPHICS)
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