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/*
* Copyright (C) 2018, 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 "ScrollingTreeCoordinated.h"
#if ENABLE(ASYNC_SCROLLING) && USE(COORDINATED_GRAPHICS)
#include "AsyncScrollingCoordinator.h"
#include "CoordinatedPlatformLayer.h"
#include "ScrollingThread.h"
#include "ScrollingTreeFixedNodeCoordinated.h"
#include "ScrollingTreeFrameHostingNode.h"
#include "ScrollingTreeFrameScrollingNodeCoordinated.h"
#include "ScrollingTreeOverflowScrollProxyNodeCoordinated.h"
#include "ScrollingTreeOverflowScrollingNodeCoordinated.h"
#include "ScrollingTreePositionedNodeCoordinated.h"
#include "ScrollingTreeStickyNodeCoordinated.h"
namespace WebCore {
Ref<ScrollingTreeCoordinated> ScrollingTreeCoordinated::create(AsyncScrollingCoordinator& scrollingCoordinator)
{
return adoptRef(*new ScrollingTreeCoordinated(scrollingCoordinator));
}
ScrollingTreeCoordinated::ScrollingTreeCoordinated(AsyncScrollingCoordinator& scrollingCoordinator)
: ThreadedScrollingTree(scrollingCoordinator)
{
}
Ref<ScrollingTreeNode> ScrollingTreeCoordinated::createScrollingTreeNode(ScrollingNodeType nodeType, ScrollingNodeID nodeID)
{
switch (nodeType) {
case ScrollingNodeType::MainFrame:
case ScrollingNodeType::Subframe:
return ScrollingTreeFrameScrollingNodeCoordinated::create(*this, nodeType, nodeID);
case ScrollingNodeType::FrameHosting:
return ScrollingTreeFrameHostingNode::create(*this, nodeID);
case ScrollingNodeType::Overflow:
return ScrollingTreeOverflowScrollingNodeCoordinated::create(*this, nodeID);
case ScrollingNodeType::OverflowProxy:
return ScrollingTreeOverflowScrollProxyNodeCoordinated::create(*this, nodeID);
case ScrollingNodeType::Fixed:
return ScrollingTreeFixedNodeCoordinated::create(*this, nodeID);
case ScrollingNodeType::Sticky:
return ScrollingTreeStickyNodeCoordinated::create(*this, nodeID);
case ScrollingNodeType::Positioned:
return ScrollingTreePositionedNodeCoordinated::create(*this, nodeID);
case ScrollingNodeType::PluginScrolling:
case ScrollingNodeType::PluginHosting:
RELEASE_ASSERT_NOT_REACHED();
}
RELEASE_ASSERT_NOT_REACHED();
}
void ScrollingTreeCoordinated::applyLayerPositionsInternal()
{
auto* rootScrollingNode = rootNode();
if (!rootScrollingNode)
return;
ThreadedScrollingTree::applyLayerPositionsInternal();
if (ScrollingThread::isCurrentThread()) {
auto rootContentsLayer = static_cast<ScrollingTreeFrameScrollingNodeCoordinated*>(rootScrollingNode)->rootContentsLayer();
rootContentsLayer->requestComposition();
}
}
void ScrollingTreeCoordinated::didCompleteRenderingUpdate()
{
// If there's a composition requested or ongoing, wait for didCompletePlatformRenderingUpdate() that will be
// called once the composiiton finishes.
if (auto* rootScrollingNode = rootNode()) {
auto rootContentsLayer = static_cast<ScrollingTreeFrameScrollingNodeCoordinated*>(rootScrollingNode)->rootContentsLayer();
if (rootContentsLayer->isCompositionRequiredOrOngoing())
return;
}
renderingUpdateComplete();
}
void ScrollingTreeCoordinated::didCompletePlatformRenderingUpdate()
{
renderingUpdateComplete();
}
static bool collectDescendantLayersAtPoint(Vector<Ref<CoordinatedPlatformLayer>>& layersAtPoint, const Ref<CoordinatedPlatformLayer>& parent, const FloatPoint& point)
{
bool existsOnDescendent = false;
bool existsOnLayer = !!parent->scrollingNodeID() && parent->bounds().contains(point) && parent->eventRegion().contains(roundedIntPoint(point));
for (auto& child : parent->children()) {
Locker childLocker { child->lock() };
FloatPoint transformedPoint(point);
if (child->transform().isInvertible()) {
float originX = child->anchorPoint().x() * child->size().width();
float originY = child->anchorPoint().y() * child->size().height();
auto transform = *(TransformationMatrix()
.translate3d(originX + child->position().x() - parent->boundsOrigin().x(), originY + child->position().y() - parent->boundsOrigin().y(), child->anchorPoint().z())
.multiply(child->transform())
.translate3d(-originX, -originY, -child->anchorPoint().z()).inverse());
auto pointInChildSpace = transform.projectPoint(point);
transformedPoint.set(pointInChildSpace.x(), pointInChildSpace.y());
}
existsOnDescendent |= collectDescendantLayersAtPoint(layersAtPoint, child, transformedPoint);
}
if (existsOnLayer && !existsOnDescendent)
layersAtPoint.append(parent);
return existsOnLayer || existsOnDescendent;
}
RefPtr<ScrollingTreeNode> ScrollingTreeCoordinated::scrollingNodeForPoint(FloatPoint point)
{
auto* rootScrollingNode = rootNode();
if (!rootScrollingNode)
return nullptr;
Locker layerLocker { m_layerHitTestMutex };
auto rootContentsLayer = static_cast<ScrollingTreeFrameScrollingNodeCoordinated*>(rootScrollingNode)->rootContentsLayer();
Vector<Ref<CoordinatedPlatformLayer>> layersAtPoint;
{
Locker rootContentsLayerLocker { rootContentsLayer->lock() };
collectDescendantLayersAtPoint(layersAtPoint, Ref { *rootContentsLayer }, point);
}
for (auto& layer : makeReversedRange(layersAtPoint)) {
Locker locker { layer->lock() };
auto* scrollingNode = nodeForID(layer->scrollingNodeID());
if (is<ScrollingTreeScrollingNode>(scrollingNode))
return scrollingNode;
}
return rootScrollingNode;
}
} // namespace WebCore
#endif // ENABLE(ASYNC_SCROLLING) && USE(COORDINATED_GRAPHICS)
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