| /* |
| * Copyright (C) 2011 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 "core/page/scrolling/ScrollingCoordinator.h" |
| |
| #include "RuntimeEnabledFeatures.h" |
| #include "core/dom/Document.h" |
| #include "core/dom/Node.h" |
| #include "core/dom/WheelController.h" |
| #include "core/html/HTMLElement.h" |
| #include "core/frame/Frame.h" |
| #include "core/frame/FrameView.h" |
| #include "core/page/Page.h" |
| #include "core/page/Settings.h" |
| #include "core/platform/ScrollAnimator.h" |
| #include "core/platform/ScrollbarTheme.h" |
| #include "core/platform/chromium/support/WebScrollbarImpl.h" |
| #include "core/platform/chromium/support/WebScrollbarThemeGeometryNative.h" |
| #include "core/platform/graphics/GraphicsLayer.h" |
| #include "core/platform/graphics/transforms/TransformState.h" |
| #include "platform/TraceEvent.h" |
| #include "platform/geometry/Region.h" |
| #if OS(MACOSX) |
| #include "core/platform/mac/ScrollAnimatorMac.h" |
| #endif |
| #include "core/plugins/PluginView.h" |
| #include "core/rendering/CompositedLayerMapping.h" |
| #include "core/rendering/RenderGeometryMap.h" |
| #include "core/rendering/RenderLayerCompositor.h" |
| #include "core/rendering/RenderView.h" |
| #include "platform/geometry/IntRect.h" |
| #include "public/platform/Platform.h" |
| #include "public/platform/WebCompositorSupport.h" |
| #include "public/platform/WebLayerPositionConstraint.h" |
| #include "public/platform/WebScrollbarLayer.h" |
| #include "public/platform/WebScrollbarThemeGeometry.h" |
| #include "public/platform/WebScrollbarThemePainter.h" |
| #include "wtf/text/StringBuilder.h" |
| |
| using WebKit::WebLayer; |
| using WebKit::WebLayerPositionConstraint; |
| using WebKit::WebRect; |
| using WebKit::WebScrollbarLayer; |
| using WebKit::WebVector; |
| |
| |
| namespace WebCore { |
| |
| static WebLayer* scrollingWebLayerForGraphicsLayer(GraphicsLayer* layer) |
| { |
| return layer->platformLayer(); |
| } |
| |
| WebLayer* ScrollingCoordinator::scrollingWebLayerForScrollableArea(ScrollableArea* scrollableArea) |
| { |
| GraphicsLayer* graphicsLayer = scrollLayerForScrollableArea(scrollableArea); |
| return graphicsLayer ? scrollingWebLayerForGraphicsLayer(graphicsLayer) : 0; |
| } |
| |
| PassRefPtr<ScrollingCoordinator> ScrollingCoordinator::create(Page* page) |
| { |
| return adoptRef(new ScrollingCoordinator(page)); |
| } |
| |
| ScrollingCoordinator::ScrollingCoordinator(Page* page) |
| : m_page(page) |
| { |
| } |
| |
| ScrollingCoordinator::~ScrollingCoordinator() |
| { |
| ASSERT(!m_page); |
| for (ScrollbarMap::iterator it = m_horizontalScrollbars.begin(); it != m_horizontalScrollbars.end(); ++it) |
| GraphicsLayer::unregisterContentsLayer(it->value->layer()); |
| for (ScrollbarMap::iterator it = m_verticalScrollbars.begin(); it != m_verticalScrollbars.end(); ++it) |
| GraphicsLayer::unregisterContentsLayer(it->value->layer()); |
| |
| } |
| |
| bool ScrollingCoordinator::touchHitTestingEnabled() const |
| { |
| RenderView* contentRenderer = m_page->mainFrame()->contentRenderer(); |
| Settings* settings = m_page->mainFrame()->document()->settings(); |
| return RuntimeEnabledFeatures::touchEnabled() && settings->compositorTouchHitTesting() && contentRenderer && contentRenderer->usesCompositing(); |
| } |
| |
| void ScrollingCoordinator::setShouldHandleScrollGestureOnMainThreadRegion(const Region& region) |
| { |
| if (WebLayer* scrollLayer = scrollingWebLayerForScrollableArea(m_page->mainFrame()->view())) { |
| Vector<IntRect> rects = region.rects(); |
| WebVector<WebRect> webRects(rects.size()); |
| for (size_t i = 0; i < rects.size(); ++i) |
| webRects[i] = rects[i]; |
| scrollLayer->setNonFastScrollableRegion(webRects); |
| } |
| } |
| |
| void ScrollingCoordinator::frameViewLayoutUpdated(FrameView* frameView) |
| { |
| TRACE_EVENT0("input", "ScrollingCoordinator::frameViewLayoutUpdated"); |
| |
| // Compute the region of the page where we can't handle scroll gestures and mousewheel events |
| // on the impl thread. This currently includes: |
| // 1. All scrollable areas, such as subframes, overflow divs and list boxes, whose composited |
| // scrolling are not enabled. We need to do this even if the frame view whose layout was updated |
| // is not the main frame. |
| // 2. Resize control areas, e.g. the small rect at the right bottom of div/textarea/iframe when |
| // CSS property "resize" is enabled. |
| // 3. Plugin areas. |
| Region shouldHandleScrollGestureOnMainThreadRegion = computeShouldHandleScrollGestureOnMainThreadRegion(m_page->mainFrame(), IntPoint()); |
| setShouldHandleScrollGestureOnMainThreadRegion(shouldHandleScrollGestureOnMainThreadRegion); |
| |
| if (touchHitTestingEnabled()) { |
| LayerHitTestRects touchEventTargetRects; |
| computeTouchEventTargetRects(touchEventTargetRects); |
| setTouchEventTargetRects(touchEventTargetRects); |
| } |
| |
| if (WebLayer* scrollLayer = scrollingWebLayerForScrollableArea(frameView)) |
| scrollLayer->setBounds(frameView->contentsSize()); |
| } |
| |
| void ScrollingCoordinator::setLayerIsContainerForFixedPositionLayers(GraphicsLayer* layer, bool enable) |
| { |
| if (WebLayer* scrollableLayer = scrollingWebLayerForGraphicsLayer(layer)) |
| scrollableLayer->setIsContainerForFixedPositionLayers(enable); |
| } |
| |
| static void clearPositionConstraintExceptForLayer(GraphicsLayer* layer, GraphicsLayer* except) |
| { |
| if (layer && layer != except && scrollingWebLayerForGraphicsLayer(layer)) |
| scrollingWebLayerForGraphicsLayer(layer)->setPositionConstraint(WebLayerPositionConstraint()); |
| } |
| |
| static WebLayerPositionConstraint computePositionConstraint(const RenderLayer* layer) |
| { |
| ASSERT(layer->isComposited()); |
| do { |
| if (layer->renderer()->style()->position() == FixedPosition) { |
| const RenderObject* fixedPositionObject = layer->renderer(); |
| bool fixedToRight = !fixedPositionObject->style()->right().isAuto(); |
| bool fixedToBottom = !fixedPositionObject->style()->bottom().isAuto(); |
| return WebLayerPositionConstraint::fixedPosition(fixedToRight, fixedToBottom); |
| } |
| |
| layer = layer->parent(); |
| } while (layer && !layer->isComposited()); |
| return WebLayerPositionConstraint(); |
| } |
| |
| void ScrollingCoordinator::updateLayerPositionConstraint(RenderLayer* layer) |
| { |
| ASSERT(layer->compositedLayerMapping()); |
| CompositedLayerMapping* compositedLayerMapping = layer->compositedLayerMapping(); |
| GraphicsLayer* mainLayer = compositedLayerMapping->childForSuperlayers(); |
| |
| // Avoid unnecessary commits |
| clearPositionConstraintExceptForLayer(compositedLayerMapping->ancestorClippingLayer(), mainLayer); |
| clearPositionConstraintExceptForLayer(compositedLayerMapping->mainGraphicsLayer(), mainLayer); |
| |
| if (WebLayer* scrollableLayer = scrollingWebLayerForGraphicsLayer(mainLayer)) |
| scrollableLayer->setPositionConstraint(computePositionConstraint(layer)); |
| } |
| |
| void ScrollingCoordinator::willDestroyScrollableArea(ScrollableArea* scrollableArea) |
| { |
| removeWebScrollbarLayer(scrollableArea, HorizontalScrollbar); |
| removeWebScrollbarLayer(scrollableArea, VerticalScrollbar); |
| } |
| |
| void ScrollingCoordinator::removeWebScrollbarLayer(ScrollableArea* scrollableArea, ScrollbarOrientation orientation) |
| { |
| ScrollbarMap& scrollbars = orientation == HorizontalScrollbar ? m_horizontalScrollbars : m_verticalScrollbars; |
| if (OwnPtr<WebScrollbarLayer> scrollbarLayer = scrollbars.take(scrollableArea)) |
| GraphicsLayer::unregisterContentsLayer(scrollbarLayer->layer()); |
| } |
| |
| static PassOwnPtr<WebScrollbarLayer> createScrollbarLayer(Scrollbar* scrollbar) |
| { |
| ScrollbarTheme* theme = scrollbar->theme(); |
| WebKit::WebScrollbarThemePainter painter(theme, scrollbar); |
| OwnPtr<WebKit::WebScrollbarThemeGeometry> geometry(WebKit::WebScrollbarThemeGeometryNative::create(theme)); |
| |
| OwnPtr<WebScrollbarLayer> scrollbarLayer = adoptPtr(WebKit::Platform::current()->compositorSupport()->createScrollbarLayer(new WebKit::WebScrollbarImpl(scrollbar), painter, geometry.leakPtr())); |
| GraphicsLayer::registerContentsLayer(scrollbarLayer->layer()); |
| return scrollbarLayer.release(); |
| } |
| |
| PassOwnPtr<WebScrollbarLayer> ScrollingCoordinator::createSolidColorScrollbarLayer(ScrollbarOrientation orientation, int thumbThickness, bool isLeftSideVerticalScrollbar) |
| { |
| WebKit::WebScrollbar::Orientation webOrientation = (orientation == HorizontalScrollbar) ? WebKit::WebScrollbar::Horizontal : WebKit::WebScrollbar::Vertical; |
| OwnPtr<WebScrollbarLayer> scrollbarLayer = adoptPtr(WebKit::Platform::current()->compositorSupport()->createSolidColorScrollbarLayer(webOrientation, thumbThickness, isLeftSideVerticalScrollbar)); |
| GraphicsLayer::registerContentsLayer(scrollbarLayer->layer()); |
| return scrollbarLayer.release(); |
| } |
| |
| static void detachScrollbarLayer(GraphicsLayer* scrollbarGraphicsLayer) |
| { |
| ASSERT(scrollbarGraphicsLayer); |
| |
| scrollbarGraphicsLayer->setContentsToPlatformLayer(0); |
| scrollbarGraphicsLayer->setDrawsContent(true); |
| } |
| |
| static void setupScrollbarLayer(GraphicsLayer* scrollbarGraphicsLayer, WebScrollbarLayer* scrollbarLayer, WebLayer* scrollLayer) |
| { |
| ASSERT(scrollbarGraphicsLayer); |
| ASSERT(scrollbarLayer); |
| |
| if (!scrollLayer) { |
| detachScrollbarLayer(scrollbarGraphicsLayer); |
| return; |
| } |
| scrollbarLayer->setScrollLayer(scrollLayer); |
| scrollbarGraphicsLayer->setContentsToPlatformLayer(scrollbarLayer->layer()); |
| scrollbarGraphicsLayer->setDrawsContent(false); |
| } |
| |
| WebScrollbarLayer* ScrollingCoordinator::addWebScrollbarLayer(ScrollableArea* scrollableArea, ScrollbarOrientation orientation, PassOwnPtr<WebKit::WebScrollbarLayer> scrollbarLayer) |
| { |
| ScrollbarMap& scrollbars = orientation == HorizontalScrollbar ? m_horizontalScrollbars : m_verticalScrollbars; |
| return scrollbars.add(scrollableArea, scrollbarLayer).iterator->value.get(); |
| } |
| |
| WebScrollbarLayer* ScrollingCoordinator::getWebScrollbarLayer(ScrollableArea* scrollableArea, ScrollbarOrientation orientation) |
| { |
| ScrollbarMap& scrollbars = orientation == HorizontalScrollbar ? m_horizontalScrollbars : m_verticalScrollbars; |
| return scrollbars.get(scrollableArea); |
| } |
| |
| void ScrollingCoordinator::scrollableAreaScrollbarLayerDidChange(ScrollableArea* scrollableArea, ScrollbarOrientation orientation) |
| { |
| // FIXME: Instead of hardcode here, we should make a setting flag. |
| #if OS(MACOSX) |
| static const bool platformSupportsCoordinatedScrollbar = ScrollAnimatorMac::canUseCoordinatedScrollbar(); |
| static const bool platformSupportsMainFrameOnly = false; // Don't care. |
| #elif OS(ANDROID) |
| static const bool platformSupportsCoordinatedScrollbar = true; |
| static const bool platformSupportsMainFrameOnly = false; |
| #else |
| static const bool platformSupportsCoordinatedScrollbar = true; |
| static const bool platformSupportsMainFrameOnly = true; |
| #endif |
| if (!platformSupportsCoordinatedScrollbar) |
| return; |
| |
| bool isMainFrame = isForMainFrame(scrollableArea); |
| if (!isMainFrame && platformSupportsMainFrameOnly) |
| return; |
| |
| GraphicsLayer* scrollbarGraphicsLayer = orientation == HorizontalScrollbar ? horizontalScrollbarLayerForScrollableArea(scrollableArea) : verticalScrollbarLayerForScrollableArea(scrollableArea); |
| if (scrollbarGraphicsLayer) { |
| Scrollbar* scrollbar = orientation == HorizontalScrollbar ? scrollableArea->horizontalScrollbar() : scrollableArea->verticalScrollbar(); |
| if (scrollbar->isCustomScrollbar()) { |
| detachScrollbarLayer(scrollbarGraphicsLayer); |
| return; |
| } |
| |
| WebScrollbarLayer* scrollbarLayer = getWebScrollbarLayer(scrollableArea, orientation); |
| if (!scrollbarLayer) { |
| Settings* settings = m_page->mainFrame()->document()->settings(); |
| |
| OwnPtr<WebScrollbarLayer> webScrollbarLayer; |
| if (settings->useSolidColorScrollbars()) { |
| ASSERT(RuntimeEnabledFeatures::overlayScrollbarsEnabled()); |
| webScrollbarLayer = createSolidColorScrollbarLayer(orientation, scrollbar->theme()->thumbThickness(scrollbar), scrollableArea->shouldPlaceVerticalScrollbarOnLeft()); |
| } else { |
| webScrollbarLayer = createScrollbarLayer(scrollbar); |
| } |
| scrollbarLayer = addWebScrollbarLayer(scrollableArea, orientation, webScrollbarLayer.release()); |
| } |
| |
| // Root layer non-overlay scrollbars should be marked opaque to disable |
| // blending. |
| bool isOpaqueScrollbar = !scrollbar->isOverlayScrollbar(); |
| if (!scrollbarGraphicsLayer->contentsOpaque()) |
| scrollbarGraphicsLayer->setContentsOpaque(isMainFrame && isOpaqueScrollbar); |
| scrollbarLayer->layer()->setOpaque(scrollbarGraphicsLayer->contentsOpaque()); |
| |
| setupScrollbarLayer(scrollbarGraphicsLayer, scrollbarLayer, scrollingWebLayerForScrollableArea(scrollableArea)); |
| } else |
| removeWebScrollbarLayer(scrollableArea, orientation); |
| } |
| |
| bool ScrollingCoordinator::scrollableAreaScrollLayerDidChange(ScrollableArea* scrollableArea) |
| { |
| GraphicsLayer* scrollLayer = scrollLayerForScrollableArea(scrollableArea); |
| if (scrollLayer) { |
| bool isMainFrame = isForMainFrame(scrollableArea); |
| scrollLayer->setScrollableArea(scrollableArea, isMainFrame); |
| } |
| |
| WebLayer* webLayer = scrollingWebLayerForScrollableArea(scrollableArea); |
| if (webLayer) { |
| webLayer->setScrollable(true); |
| webLayer->setScrollPosition(IntPoint(scrollableArea->scrollPosition() - scrollableArea->minimumScrollPosition())); |
| webLayer->setMaxScrollPosition(IntSize(scrollableArea->scrollSize(HorizontalScrollbar), scrollableArea->scrollSize(VerticalScrollbar))); |
| } |
| if (WebScrollbarLayer* scrollbarLayer = getWebScrollbarLayer(scrollableArea, HorizontalScrollbar)) { |
| GraphicsLayer* horizontalScrollbarLayer = horizontalScrollbarLayerForScrollableArea(scrollableArea); |
| if (horizontalScrollbarLayer) |
| setupScrollbarLayer(horizontalScrollbarLayer, scrollbarLayer, webLayer); |
| } |
| if (WebScrollbarLayer* scrollbarLayer = getWebScrollbarLayer(scrollableArea, VerticalScrollbar)) { |
| GraphicsLayer* verticalScrollbarLayer = verticalScrollbarLayerForScrollableArea(scrollableArea); |
| if (verticalScrollbarLayer) |
| setupScrollbarLayer(verticalScrollbarLayer, scrollbarLayer, webLayer); |
| } |
| |
| return !!webLayer; |
| } |
| |
| // In order to do a DFS cross-frame walk of the RenderLayer tree, we need to know which |
| // RenderLayers have child frames inside of them. This computes a mapping for the |
| // current frame which we can consult while walking the layers of that frame. |
| // Whenever we descend into a new frame, a new map will be created. |
| typedef HashMap<const RenderLayer*, Vector<const Frame*> > LayerFrameMap; |
| static void makeLayerChildFrameMap(const Frame* currentFrame, LayerFrameMap* map) |
| { |
| map->clear(); |
| const FrameTree* tree = currentFrame->tree(); |
| for (const Frame* child = tree->firstChild(); child; child = child->tree()->nextSibling()) { |
| const RenderLayer* containingLayer = child->ownerRenderer()->enclosingLayer(); |
| LayerFrameMap::iterator iter = map->find(containingLayer); |
| if (iter == map->end()) |
| iter = map->add(containingLayer, Vector<const Frame*>()).iterator; |
| iter->value.append(child); |
| } |
| } |
| |
| static void convertLayerRectsToEnclosingCompositedLayerRecursive( |
| const RenderLayer* curLayer, |
| const LayerHitTestRects& layerRects, |
| LayerHitTestRects& compositorRects, |
| RenderGeometryMap& geometryMap, |
| HashSet<const RenderLayer*>& layersWithRects, |
| LayerFrameMap& layerChildFrameMap) |
| { |
| // Project any rects for the current layer |
| LayerHitTestRects::const_iterator layerIter = layerRects.find(curLayer); |
| if (layerIter != layerRects.end()) { |
| // Find the enclosing composited layer when it's in another document (for non-composited iframes). |
| RenderLayer* compositedLayer = 0; |
| for (const RenderLayer* layer = layerIter->key; !compositedLayer;) { |
| compositedLayer = layer->enclosingCompositingLayerForRepaint(); |
| if (!compositedLayer) { |
| RenderObject* owner = layer->renderer()->frame()->ownerRenderer(); |
| if (!owner) |
| break; |
| layer = owner->enclosingLayer(); |
| } |
| } |
| if (!compositedLayer) { |
| // Since this machinery is used only when accelerated compositing is enabled, we expect |
| // that every layer should have an enclosing composited layer. |
| ASSERT_NOT_REACHED(); |
| return; |
| } |
| |
| LayerHitTestRects::iterator compIter = compositorRects.find(compositedLayer); |
| if (compIter == compositorRects.end()) |
| compIter = compositorRects.add(compositedLayer, Vector<LayoutRect>()).iterator; |
| // Transform each rect to the co-ordinate space of it's enclosing composited layer. |
| for (size_t i = 0; i < layerIter->value.size(); ++i) { |
| LayoutRect rect = layerIter->value[i]; |
| if (compositedLayer != curLayer) { |
| FloatQuad compositorQuad = geometryMap.mapToContainer(rect, compositedLayer->renderer()); |
| rect = LayoutRect(compositorQuad.boundingBox()); |
| // If the enclosing composited layer itself is scrolled, we have to undo the subtraction |
| // of its scroll offset since we want the offset relative to the scrolling content, not |
| // the element itself. |
| rect.move(compositedLayer->scrolledContentOffset()); |
| } |
| compIter->value.append(rect); |
| } |
| } |
| |
| // Walk child layers of interest |
| for (const RenderLayer* childLayer = curLayer->firstChild(); childLayer; childLayer = childLayer->nextSibling()) { |
| if (layersWithRects.contains(childLayer)) { |
| geometryMap.pushMappingsToAncestor(childLayer, curLayer); |
| convertLayerRectsToEnclosingCompositedLayerRecursive(childLayer, layerRects, compositorRects, geometryMap, layersWithRects, layerChildFrameMap); |
| geometryMap.popMappingsToAncestor(curLayer); |
| } |
| } |
| |
| // If this layer has any frames of interest as a child of it, walk those (with an updated frame map). |
| LayerFrameMap::iterator mapIter = layerChildFrameMap.find(curLayer); |
| if (mapIter != layerChildFrameMap.end()) { |
| for (size_t i = 0; i < mapIter->value.size(); i++) { |
| const Frame* childFrame = mapIter->value[i]; |
| const RenderLayer* childLayer = childFrame->view()->renderView()->layer(); |
| if (layersWithRects.contains(childLayer)) { |
| LayerFrameMap newLayerChildFrameMap; |
| makeLayerChildFrameMap(childFrame, &newLayerChildFrameMap); |
| geometryMap.pushMappingsToAncestor(childLayer, curLayer); |
| convertLayerRectsToEnclosingCompositedLayerRecursive(childLayer, layerRects, compositorRects, geometryMap, layersWithRects, newLayerChildFrameMap); |
| geometryMap.popMappingsToAncestor(curLayer); |
| } |
| } |
| } |
| } |
| |
| static void convertLayerRectsToEnclosingCompositedLayer(Frame* mainFrame, const LayerHitTestRects& layerRects, LayerHitTestRects& compositorRects) |
| { |
| TRACE_EVENT0("input", "ScrollingCoordinator::convertLayerRectsToEnclosingCompositedLayer"); |
| bool touchHandlerInChildFrame = false; |
| |
| // We have a set of rects per RenderLayer, we need to map them to their bounding boxes in their |
| // enclosing composited layer. To do this most efficiently we'll walk the RenderLayer tree using |
| // RenderGeometryMap. First record all the branches we should traverse in the tree (including |
| // all documents on the page). |
| HashSet<const RenderLayer*> layersWithRects; |
| for (LayerHitTestRects::const_iterator layerIter = layerRects.begin(); layerIter != layerRects.end(); ++layerIter) { |
| const RenderLayer* layer = layerIter->key; |
| do { |
| if (!layersWithRects.add(layer).isNewEntry) |
| break; |
| |
| if (layer->parent()) { |
| layer = layer->parent(); |
| } else if (RenderObject* parentDocRenderer = layer->renderer()->frame()->ownerRenderer()) { |
| layer = parentDocRenderer->enclosingLayer(); |
| touchHandlerInChildFrame = true; |
| } |
| } while (layer); |
| } |
| |
| // Now walk the layer projecting rects while maintaining a RenderGeometryMap |
| MapCoordinatesFlags flags = UseTransforms; |
| if (touchHandlerInChildFrame) |
| flags |= TraverseDocumentBoundaries; |
| RenderGeometryMap geometryMap(flags); |
| LayerFrameMap layerChildFrameMap; |
| makeLayerChildFrameMap(mainFrame, &layerChildFrameMap); |
| convertLayerRectsToEnclosingCompositedLayerRecursive(mainFrame->contentRenderer()->layer(), layerRects, compositorRects, geometryMap, layersWithRects, layerChildFrameMap); |
| } |
| |
| // Note that in principle this could be called more often than computeTouchEventTargetRects, for |
| // example during a non-composited scroll (although that's not yet implemented - crbug.com/261307). |
| void ScrollingCoordinator::setTouchEventTargetRects(const LayerHitTestRects& layerRects) |
| { |
| TRACE_EVENT0("input", "ScrollingCoordinator::setTouchEventTargetRects"); |
| |
| LayerHitTestRects compositorRects; |
| convertLayerRectsToEnclosingCompositedLayer(m_page->mainFrame(), layerRects, compositorRects); |
| |
| HashSet<const RenderLayer*> oldLayersWithTouchRects; |
| m_layersWithTouchRects.swap(oldLayersWithTouchRects); |
| |
| for (LayerHitTestRects::const_iterator iter = compositorRects.begin(); iter != compositorRects.end(); ++iter) { |
| const RenderLayer* layer = iter->key; |
| WebVector<WebRect> webRects(iter->value.size()); |
| for (size_t i = 0; i < iter->value.size(); ++i) |
| webRects[i] = enclosingIntRect(iter->value[i]); |
| CompositedLayerMapping* compositedLayerMapping = layer->compositedLayerMapping(); |
| // If the layer is using composited scrolling, then it's the contents that these |
| // rects apply to. |
| GraphicsLayer* graphicsLayer = compositedLayerMapping->scrollingContentsLayer(); |
| if (!graphicsLayer) |
| graphicsLayer = compositedLayerMapping->mainGraphicsLayer(); |
| graphicsLayer->platformLayer()->setTouchEventHandlerRegion(webRects); |
| oldLayersWithTouchRects.remove(layer); |
| m_layersWithTouchRects.add(layer); |
| } |
| |
| // If there are any layers left that we haven't updated, clear them out. |
| for (HashSet<const RenderLayer*>::iterator it = oldLayersWithTouchRects.begin(); it != oldLayersWithTouchRects.end(); ++it) { |
| if (CompositedLayerMapping* compositedLayerMapping = (*it)->compositedLayerMapping()) { |
| GraphicsLayer* graphicsLayer = compositedLayerMapping->scrollingContentsLayer(); |
| if (!graphicsLayer) |
| graphicsLayer = compositedLayerMapping->mainGraphicsLayer(); |
| graphicsLayer->platformLayer()->setTouchEventHandlerRegion(WebVector<WebRect>()); |
| } |
| } |
| } |
| |
| void ScrollingCoordinator::touchEventTargetRectsDidChange(const Document*) |
| { |
| if (!touchHitTestingEnabled()) |
| return; |
| |
| // Wait until after layout to update. |
| if (m_page->mainFrame()->view()->needsLayout()) |
| return; |
| |
| TRACE_EVENT0("input", "ScrollingCoordinator::touchEventTargetRectsDidChange"); |
| |
| LayerHitTestRects touchEventTargetRects; |
| computeTouchEventTargetRects(touchEventTargetRects); |
| setTouchEventTargetRects(touchEventTargetRects); |
| } |
| |
| void ScrollingCoordinator::updateScrollParentForGraphicsLayer(GraphicsLayer* child, RenderLayer* parent) |
| { |
| WebLayer* scrollParentWebLayer = 0; |
| if (parent && parent->compositedLayerMapping()) |
| scrollParentWebLayer = scrollingWebLayerForGraphicsLayer(parent->compositedLayerMapping()->parentForSublayers()); |
| |
| child->setScrollParent(scrollParentWebLayer); |
| } |
| |
| void ScrollingCoordinator::updateClipParentForGraphicsLayer(GraphicsLayer* child, RenderLayer* parent) |
| { |
| WebLayer* clipParentWebLayer = 0; |
| if (parent && parent->compositedLayerMapping()) |
| clipParentWebLayer = scrollingWebLayerForGraphicsLayer(parent->compositedLayerMapping()->parentForSublayers()); |
| |
| child->setClipParent(clipParentWebLayer); |
| } |
| |
| void ScrollingCoordinator::willDestroyRenderLayer(RenderLayer* layer) |
| { |
| m_layersWithTouchRects.remove(layer); |
| } |
| |
| void ScrollingCoordinator::setWheelEventHandlerCount(unsigned count) |
| { |
| if (WebLayer* scrollLayer = scrollingWebLayerForScrollableArea(m_page->mainFrame()->view())) |
| scrollLayer->setHaveWheelEventHandlers(count > 0); |
| } |
| |
| void ScrollingCoordinator::recomputeWheelEventHandlerCountForFrameView(FrameView* frameView) |
| { |
| UNUSED_PARAM(frameView); |
| setWheelEventHandlerCount(computeCurrentWheelEventHandlerCount()); |
| } |
| |
| void ScrollingCoordinator::setShouldUpdateScrollLayerPositionOnMainThread(MainThreadScrollingReasons reasons) |
| { |
| if (WebLayer* scrollLayer = scrollingWebLayerForScrollableArea(m_page->mainFrame()->view())) |
| scrollLayer->setShouldScrollOnMainThread(reasons); |
| } |
| |
| void ScrollingCoordinator::pageDestroyed() |
| { |
| ASSERT(m_page); |
| m_page = 0; |
| } |
| |
| bool ScrollingCoordinator::coordinatesScrollingForFrameView(FrameView* frameView) const |
| { |
| ASSERT(isMainThread()); |
| ASSERT(m_page); |
| |
| // We currently only handle the main frame. |
| if (&frameView->frame() != m_page->mainFrame()) |
| return false; |
| |
| // We currently only support composited mode. |
| RenderView* renderView = m_page->mainFrame()->contentRenderer(); |
| if (!renderView) |
| return false; |
| return renderView->usesCompositing(); |
| } |
| |
| Region ScrollingCoordinator::computeShouldHandleScrollGestureOnMainThreadRegion(const Frame* frame, const IntPoint& frameLocation) const |
| { |
| Region shouldHandleScrollGestureOnMainThreadRegion; |
| FrameView* frameView = frame->view(); |
| if (!frameView) |
| return shouldHandleScrollGestureOnMainThreadRegion; |
| |
| IntPoint offset = frameLocation; |
| offset.moveBy(frameView->frameRect().location()); |
| |
| if (const FrameView::ScrollableAreaSet* scrollableAreas = frameView->scrollableAreas()) { |
| for (FrameView::ScrollableAreaSet::const_iterator it = scrollableAreas->begin(), end = scrollableAreas->end(); it != end; ++it) { |
| ScrollableArea* scrollableArea = *it; |
| // Composited scrollable areas can be scrolled off the main thread. |
| if (scrollableArea->usesCompositedScrolling()) |
| continue; |
| IntRect box = scrollableArea->scrollableAreaBoundingBox(); |
| box.moveBy(offset); |
| shouldHandleScrollGestureOnMainThreadRegion.unite(box); |
| } |
| } |
| |
| // We use GestureScrollBegin/Update/End for moving the resizer handle. So we mark these |
| // small resizer areas as non-fast-scrollable to allow the scroll gestures to be passed to |
| // main thread if they are targeting the resizer area. (Resizing is done in EventHandler.cpp |
| // on main thread). |
| if (const FrameView::ResizerAreaSet* resizerAreas = frameView->resizerAreas()) { |
| for (FrameView::ResizerAreaSet::const_iterator it = resizerAreas->begin(), end = resizerAreas->end(); it != end; ++it) { |
| RenderBox* box = *it; |
| IntRect bounds = box->absoluteBoundingBoxRect(); |
| IntRect corner = box->layer()->scrollableArea()->touchResizerCornerRect(bounds); |
| corner.moveBy(offset); |
| shouldHandleScrollGestureOnMainThreadRegion.unite(corner); |
| } |
| } |
| |
| if (const HashSet<RefPtr<Widget> >* children = frameView->children()) { |
| for (HashSet<RefPtr<Widget> >::const_iterator it = children->begin(), end = children->end(); it != end; ++it) { |
| if (!(*it)->isPluginView()) |
| continue; |
| |
| PluginView* pluginView = toPluginView((*it).get()); |
| if (pluginView->wantsWheelEvents()) |
| shouldHandleScrollGestureOnMainThreadRegion.unite(pluginView->frameRect()); |
| } |
| } |
| |
| FrameTree* tree = frame->tree(); |
| for (Frame* subFrame = tree->firstChild(); subFrame; subFrame = subFrame->tree()->nextSibling()) |
| shouldHandleScrollGestureOnMainThreadRegion.unite(computeShouldHandleScrollGestureOnMainThreadRegion(subFrame, offset)); |
| |
| return shouldHandleScrollGestureOnMainThreadRegion; |
| } |
| |
| static void accumulateDocumentTouchEventTargetRects(LayerHitTestRects& rects, const Document* document) |
| { |
| ASSERT(document); |
| if (!document->touchEventTargets()) |
| return; |
| |
| const TouchEventTargetSet* targets = document->touchEventTargets(); |
| |
| // If there's a handler on the document, html or body element (fairly common in practice), |
| // then we can quickly mark the entire document and skip looking at any other handlers. |
| // Note that technically a handler on the body doesn't cover the whole document, but it's |
| // reasonable to be conservative and report the whole document anyway. |
| for (TouchEventTargetSet::const_iterator iter = targets->begin(); iter != targets->end(); ++iter) { |
| Node* target = iter->key; |
| if (target == document || target == document->documentElement() || target == document->body()) { |
| if (RenderObject* renderer = document->renderer()) { |
| renderer->computeLayerHitTestRects(rects); |
| } |
| return; |
| } |
| } |
| |
| for (TouchEventTargetSet::const_iterator iter = targets->begin(); iter != targets->end(); ++iter) { |
| const Node* target = iter->key; |
| if (!target->inDocument()) |
| continue; |
| |
| if (target->isDocumentNode()) { |
| ASSERT(target != document); |
| accumulateDocumentTouchEventTargetRects(rects, toDocument(target)); |
| } else if (RenderObject* renderer = target->renderer()) { |
| // If the set also contains one of our ancestor nodes then processing |
| // this node would be redundant. |
| bool hasTouchEventTargetAncestor = false; |
| for (Node* ancestor = target->parentNode(); ancestor && !hasTouchEventTargetAncestor; ancestor = ancestor->parentNode()) { |
| if (targets->contains(ancestor)) |
| hasTouchEventTargetAncestor = true; |
| } |
| if (!hasTouchEventTargetAncestor) |
| renderer->computeLayerHitTestRects(rects); |
| } |
| } |
| |
| } |
| |
| void ScrollingCoordinator::computeTouchEventTargetRects(LayerHitTestRects& rects) |
| { |
| TRACE_EVENT0("input", "ScrollingCoordinator::computeTouchEventTargetRects"); |
| ASSERT(touchHitTestingEnabled()); |
| |
| Document* document = m_page->mainFrame()->document(); |
| if (!document || !document->view()) |
| return; |
| |
| accumulateDocumentTouchEventTargetRects(rects, document); |
| } |
| |
| unsigned ScrollingCoordinator::computeCurrentWheelEventHandlerCount() |
| { |
| unsigned wheelEventHandlerCount = 0; |
| |
| for (Frame* frame = m_page->mainFrame(); frame; frame = frame->tree()->traverseNext()) { |
| if (frame->document()) |
| wheelEventHandlerCount += WheelController::from(frame->document())->wheelEventHandlerCount(); |
| } |
| |
| return wheelEventHandlerCount; |
| } |
| |
| void ScrollingCoordinator::frameViewWheelEventHandlerCountChanged(FrameView* frameView) |
| { |
| ASSERT(isMainThread()); |
| ASSERT(m_page); |
| |
| recomputeWheelEventHandlerCountForFrameView(frameView); |
| } |
| |
| void ScrollingCoordinator::frameViewHasSlowRepaintObjectsDidChange(FrameView* frameView) |
| { |
| ASSERT(isMainThread()); |
| ASSERT(m_page); |
| |
| if (!coordinatesScrollingForFrameView(frameView)) |
| return; |
| |
| updateShouldUpdateScrollLayerPositionOnMainThread(); |
| } |
| |
| void ScrollingCoordinator::frameViewFixedObjectsDidChange(FrameView* frameView) |
| { |
| ASSERT(isMainThread()); |
| ASSERT(m_page); |
| |
| if (!coordinatesScrollingForFrameView(frameView)) |
| return; |
| |
| updateShouldUpdateScrollLayerPositionOnMainThread(); |
| } |
| |
| GraphicsLayer* ScrollingCoordinator::scrollLayerForScrollableArea(ScrollableArea* scrollableArea) |
| { |
| return scrollableArea->layerForScrolling(); |
| } |
| |
| GraphicsLayer* ScrollingCoordinator::horizontalScrollbarLayerForScrollableArea(ScrollableArea* scrollableArea) |
| { |
| return scrollableArea->layerForHorizontalScrollbar(); |
| } |
| |
| GraphicsLayer* ScrollingCoordinator::verticalScrollbarLayerForScrollableArea(ScrollableArea* scrollableArea) |
| { |
| return scrollableArea->layerForVerticalScrollbar(); |
| } |
| |
| bool ScrollingCoordinator::isForMainFrame(ScrollableArea* scrollableArea) const |
| { |
| return scrollableArea == m_page->mainFrame()->view(); |
| } |
| |
| GraphicsLayer* ScrollingCoordinator::scrollLayerForFrameView(FrameView* frameView) |
| { |
| RenderView* renderView = frameView->frame().contentRenderer(); |
| if (!renderView) |
| return 0; |
| return renderView->compositor()->scrollLayer(); |
| } |
| |
| GraphicsLayer* ScrollingCoordinator::counterScrollingLayerForFrameView(FrameView*) |
| { |
| return 0; |
| } |
| |
| void ScrollingCoordinator::frameViewRootLayerDidChange(FrameView* frameView) |
| { |
| ASSERT(isMainThread()); |
| ASSERT(m_page); |
| |
| if (!coordinatesScrollingForFrameView(frameView)) |
| return; |
| |
| frameViewLayoutUpdated(frameView); |
| recomputeWheelEventHandlerCountForFrameView(frameView); |
| updateShouldUpdateScrollLayerPositionOnMainThread(); |
| } |
| |
| #if OS(MACOSX) |
| void ScrollingCoordinator::handleWheelEventPhase(PlatformWheelEventPhase phase) |
| { |
| ASSERT(isMainThread()); |
| |
| if (!m_page) |
| return; |
| |
| FrameView* frameView = m_page->mainFrame()->view(); |
| if (!frameView) |
| return; |
| |
| frameView->scrollAnimator()->handleWheelEventPhase(phase); |
| } |
| #endif |
| |
| bool ScrollingCoordinator::hasVisibleSlowRepaintViewportConstrainedObjects(FrameView* frameView) const |
| { |
| const FrameView::ViewportConstrainedObjectSet* viewportConstrainedObjects = frameView->viewportConstrainedObjects(); |
| if (!viewportConstrainedObjects) |
| return false; |
| |
| for (FrameView::ViewportConstrainedObjectSet::const_iterator it = viewportConstrainedObjects->begin(), end = viewportConstrainedObjects->end(); it != end; ++it) { |
| RenderObject* viewportConstrainedObject = *it; |
| if (!viewportConstrainedObject->isBoxModelObject() || !viewportConstrainedObject->hasLayer()) |
| return true; |
| RenderLayer* layer = toRenderBoxModelObject(viewportConstrainedObject)->layer(); |
| // Any explicit reason that a fixed position element is not composited shouldn't cause slow scrolling. |
| if (!layer->isComposited() && layer->viewportConstrainedNotCompositedReason() == RenderLayer::NoNotCompositedReason) |
| return true; |
| |
| // Composited layers that actually paint into their enclosing ancestor |
| // must also force main thread scrolling. |
| if (layer->isComposited() && layer->compositedLayerMapping()->paintsIntoCompositedAncestor()) |
| return true; |
| } |
| return false; |
| } |
| |
| MainThreadScrollingReasons ScrollingCoordinator::mainThreadScrollingReasons() const |
| { |
| // The main thread scrolling reasons are applicable to scrolls of the main |
| // frame. If it does not exist or if it is not scrollable, there is no |
| // reason to force main thread scrolling. |
| FrameView* frameView = m_page->mainFrame()->view(); |
| if (!frameView || !frameView->isScrollable()) |
| return static_cast<MainThreadScrollingReasons>(0); |
| |
| MainThreadScrollingReasons mainThreadScrollingReasons = (MainThreadScrollingReasons)0; |
| |
| if (frameView->hasSlowRepaintObjects()) |
| mainThreadScrollingReasons |= HasSlowRepaintObjects; |
| if (hasVisibleSlowRepaintViewportConstrainedObjects(frameView)) |
| mainThreadScrollingReasons |= HasNonLayerViewportConstrainedObjects; |
| |
| return mainThreadScrollingReasons; |
| } |
| |
| void ScrollingCoordinator::updateShouldUpdateScrollLayerPositionOnMainThread() |
| { |
| setShouldUpdateScrollLayerPositionOnMainThread(mainThreadScrollingReasons()); |
| } |
| |
| String ScrollingCoordinator::mainThreadScrollingReasonsAsText(MainThreadScrollingReasons reasons) |
| { |
| StringBuilder stringBuilder; |
| |
| if (reasons & ScrollingCoordinator::HasSlowRepaintObjects) |
| stringBuilder.append("Has slow repaint objects, "); |
| if (reasons & ScrollingCoordinator::HasViewportConstrainedObjectsWithoutSupportingFixedLayers) |
| stringBuilder.append("Has viewport constrained objects without supporting fixed layers, "); |
| if (reasons & ScrollingCoordinator::HasNonLayerViewportConstrainedObjects) |
| stringBuilder.append("Has non-layer viewport-constrained objects, "); |
| |
| if (stringBuilder.length()) |
| stringBuilder.resize(stringBuilder.length() - 2); |
| return stringBuilder.toString(); |
| } |
| |
| String ScrollingCoordinator::mainThreadScrollingReasonsAsText() const |
| { |
| return mainThreadScrollingReasonsAsText(mainThreadScrollingReasons()); |
| } |
| |
| } // namespace WebCore |