| /* |
| * Copyright (C) 2003, 2009, 2012, 2015 Apple Inc. All rights reserved. |
| * |
| * Portions are Copyright (C) 1998 Netscape Communications Corporation. |
| * |
| * Other contributors: |
| * Robert O'Callahan <roc+@cs.cmu.edu> |
| * David Baron <dbaron@fas.harvard.edu> |
| * Christian Biesinger <cbiesinger@web.de> |
| * Randall Jesup <rjesup@wgate.com> |
| * Roland Mainz <roland.mainz@informatik.med.uni-giessen.de> |
| * Josh Soref <timeless@mac.com> |
| * Boris Zbarsky <bzbarsky@mit.edu> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| * |
| * Alternatively, the contents of this file may be used under the terms |
| * of either the Mozilla Public License Version 1.1, found at |
| * http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public |
| * License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html |
| * (the "GPL"), in which case the provisions of the MPL or the GPL are |
| * applicable instead of those above. If you wish to allow use of your |
| * version of this file only under the terms of one of those two |
| * licenses (the MPL or the GPL) and not to allow others to use your |
| * version of this file under the LGPL, indicate your decision by |
| * deletingthe provisions above and replace them with the notice and |
| * other provisions required by the MPL or the GPL, as the case may be. |
| * If you do not delete the provisions above, a recipient may use your |
| * version of this file under any of the LGPL, the MPL or the GPL. |
| */ |
| |
| #pragma once |
| |
| #include "ClipRect.h" |
| #include "GraphicsLayer.h" |
| #include "LayerFragment.h" |
| #include "PaintFrequencyTracker.h" |
| #include "PaintInfo.h" |
| #include "RenderBox.h" |
| #include "RenderPtr.h" |
| #include "ScrollBehavior.h" |
| #include "ScrollableArea.h" |
| #include <memory> |
| #include <wtf/Markable.h> |
| #include <wtf/WeakPtr.h> |
| |
| namespace WTF { |
| class TextStream; |
| } |
| |
| namespace WebCore { |
| |
| class CSSFilter; |
| class ClipRects; |
| class ClipRectsCache; |
| class EventRegionContext; |
| class HitTestRequest; |
| class HitTestResult; |
| class HitTestingTransformState; |
| class Region; |
| class RenderFragmentedFlow; |
| class RenderGeometryMap; |
| class RenderLayerBacking; |
| class RenderLayerCompositor; |
| class RenderLayerFilters; |
| class RenderMarquee; |
| class RenderReplica; |
| class RenderScrollbarPart; |
| class RenderStyle; |
| class RenderView; |
| class Scrollbar; |
| class TransformationMatrix; |
| |
| enum BorderRadiusClippingRule { IncludeSelfForBorderRadius, DoNotIncludeSelfForBorderRadius }; |
| enum IncludeSelfOrNot { IncludeSelf, ExcludeSelf }; |
| enum CrossFrameBoundaries { No, Yes }; |
| |
| enum RepaintStatus { |
| NeedsNormalRepaint, |
| NeedsFullRepaint, |
| NeedsFullRepaintForPositionedMovementLayout |
| }; |
| |
| enum ClipRectsType { |
| PaintingClipRects, // Relative to painting ancestor. Used for painting. |
| RootRelativeClipRects, // Relative to the ancestor treated as the root (e.g. transformed layer). Used for hit testing. |
| AbsoluteClipRects, // Relative to the RenderView's layer. Used for compositing overlap testing. |
| NumCachedClipRectsTypes, |
| AllClipRectTypes, |
| TemporaryClipRects |
| }; |
| |
| enum ShouldRespectOverflowClip { |
| IgnoreOverflowClip, |
| RespectOverflowClip |
| }; |
| |
| enum ShouldApplyRootOffsetToFragments { |
| ApplyRootOffsetToFragments, |
| IgnoreRootOffsetForFragments |
| }; |
| |
| enum class RequestState { |
| Unknown, |
| DontCare, |
| False, |
| True, |
| Undetermined |
| }; |
| |
| enum class IndirectCompositingReason { |
| None, |
| Clipping, |
| Stacking, |
| OverflowScrollPositioning, |
| Overlap, |
| BackgroundLayer, |
| GraphicalEffect, // opacity, mask, filter, transform etc. |
| Perspective, |
| Preserve3D |
| }; |
| |
| struct ScrollRectToVisibleOptions { |
| SelectionRevealMode revealMode { SelectionRevealMode::Reveal }; |
| const ScrollAlignment& alignX { ScrollAlignment::alignCenterIfNeeded }; |
| const ScrollAlignment& alignY { ScrollAlignment::alignCenterIfNeeded }; |
| ShouldAllowCrossOriginScrolling shouldAllowCrossOriginScrolling { ShouldAllowCrossOriginScrolling::No }; |
| ScrollBehavior behavior { ScrollBehavior::Auto }; |
| }; |
| |
| using ScrollingScope = uint64_t; |
| |
| DECLARE_ALLOCATOR_WITH_HEAP_IDENTIFIER(RenderLayer); |
| class RenderLayer final : public ScrollableArea { |
| WTF_MAKE_FAST_ALLOCATED_WITH_HEAP_IDENTIFIER(RenderLayer); |
| public: |
| friend class RenderReplica; |
| friend class RenderLayerFilters; |
| friend class RenderLayerBacking; |
| friend class RenderLayerCompositor; |
| |
| explicit RenderLayer(RenderLayerModelObject&); |
| virtual ~RenderLayer(); |
| |
| #if PLATFORM(IOS_FAMILY) |
| // Called before the renderer's widget (if any) has been nulled out. |
| void willBeDestroyed(); |
| #endif |
| String name() const; |
| |
| Page& page() const { return renderer().page(); } |
| RenderLayerModelObject& renderer() const { return m_renderer; } |
| RenderBox* renderBox() const { return is<RenderBox>(renderer()) ? &downcast<RenderBox>(renderer()) : nullptr; } |
| |
| RenderLayer* parent() const { return m_parent; } |
| RenderLayer* previousSibling() const { return m_previous; } |
| RenderLayer* nextSibling() const { return m_next; } |
| RenderLayer* firstChild() const { return m_first; } |
| RenderLayer* lastChild() const { return m_last; } |
| bool isDescendantOf(const RenderLayer&) const; |
| RenderLayer* commonAncestorWithLayer(const RenderLayer&) const; |
| |
| // This does an ancestor tree walk. Avoid it! |
| const RenderLayer* root() const |
| { |
| const RenderLayer* curr = this; |
| while (curr->parent()) |
| curr = curr->parent(); |
| return curr; |
| } |
| |
| void addChild(RenderLayer& newChild, RenderLayer* beforeChild = nullptr); |
| void removeChild(RenderLayer&); |
| |
| enum class LayerChangeTiming { |
| StyleChange, |
| RenderTreeConstruction, |
| }; |
| void insertOnlyThisLayer(LayerChangeTiming); |
| void removeOnlyThisLayer(LayerChangeTiming); |
| |
| bool isNormalFlowOnly() const { return m_isNormalFlowOnly; } |
| |
| // isStackingContext is true for layers that we've determined should be stacking contexts for painting. |
| // Not all stacking contexts are CSS stacking contexts. |
| bool isStackingContext() const { return isCSSStackingContext() || m_isOpportunisticStackingContext; } |
| |
| // isCSSStackingContext is true for layers that are stacking contexts from a CSS perspective. |
| // isCSSStackingContext() => isStackingContext(). |
| // FIXME: m_forcedStackingContext should affect isStackingContext(), not isCSSStackingContext(), but doing so breaks media control mix-blend-mode. |
| bool isCSSStackingContext() const { return m_isCSSStackingContext || m_forcedStackingContext; } |
| |
| // Gets the enclosing stacking context for this layer, excluding this layer itself. |
| RenderLayer* stackingContext() const; |
| |
| // Gets the enclosing stacking container for this layer, possibly the layer |
| // itself, if it is a stacking container. |
| RenderLayer* enclosingStackingContext() { return isStackingContext() ? this : stackingContext(); } |
| |
| RenderLayer* paintOrderParent() const; |
| |
| void dirtyNormalFlowList(); |
| void dirtyZOrderLists(); |
| void dirtyStackingContextZOrderLists(); |
| |
| bool normalFlowListDirty() const { return m_normalFlowListDirty; } |
| bool zOrderListsDirty() const { return m_zOrderListsDirty; } |
| |
| #if ASSERT_ENABLED |
| bool layerListMutationAllowed() const { return m_layerListMutationAllowed; } |
| void setLayerListMutationAllowed(bool flag) { m_layerListMutationAllowed = flag; } |
| #endif |
| |
| private: |
| // These flags propagate in paint order (z-order tree). |
| enum class Compositing { |
| HasDescendantNeedingRequirementsTraversal = 1 << 0, // Need to do the overlap-testing tree walk because hierarchy or geometry changed. |
| HasDescendantNeedingBackingOrHierarchyTraversal = 1 << 1, // Need to update geometry, configuration and update the GraphicsLayer tree. |
| |
| // Things that trigger HasDescendantNeedingRequirementsTraversal |
| NeedsPaintOrderChildrenUpdate = 1 << 2, // The paint order children of this layer changed (gained/lost child, order change). |
| NeedsPostLayoutUpdate = 1 << 3, // Needs compositing to be re-evaluated after layout (it depends on geometry). |
| DescendantsNeedRequirementsTraversal = 1 << 4, // Something changed that forces computeCompositingRequirements to traverse all descendant layers. |
| SubsequentLayersNeedRequirementsTraversal = 1 << 5, // Something changed that forces computeCompositingRequirements to traverse all layers later in paint order. |
| |
| // Things that trigger HasDescendantNeedingBackingOrHierarchyTraversal |
| NeedsGeometryUpdate = 1 << 6, // This layer needs a geometry update. |
| NeedsConfigurationUpdate = 1 << 7, // This layer needs a configuration update (updating its internal compositing hierarchy). |
| NeedsScrollingTreeUpdate = 1 << 8, // Something changed that requires this layer's scrolling tree node to be updated. |
| NeedsLayerConnection = 1 << 9, // This layer needs hookup with its parents or children. |
| ChildrenNeedGeometryUpdate = 1 << 10, // This layer's composited children need a geometry update. |
| DescendantsNeedBackingAndHierarchyTraversal = 1 << 11, // Something changed that forces us to traverse all descendant layers in updateBackingAndHierarchy. |
| }; |
| |
| static constexpr OptionSet<Compositing> computeCompositingRequirementsFlags() |
| { |
| return { |
| Compositing::NeedsPaintOrderChildrenUpdate, |
| Compositing::NeedsPostLayoutUpdate, |
| Compositing::DescendantsNeedRequirementsTraversal, |
| Compositing::SubsequentLayersNeedRequirementsTraversal, |
| }; |
| } |
| |
| static constexpr OptionSet<Compositing> updateBackingOrHierarchyFlags() |
| { |
| return { |
| Compositing::NeedsLayerConnection, |
| Compositing::NeedsGeometryUpdate, |
| Compositing::NeedsConfigurationUpdate, |
| Compositing::NeedsScrollingTreeUpdate, |
| Compositing::ChildrenNeedGeometryUpdate, |
| Compositing::DescendantsNeedBackingAndHierarchyTraversal, |
| }; |
| } |
| |
| void setAncestorsHaveCompositingDirtyFlag(Compositing); |
| |
| public: |
| bool hasDescendantNeedingCompositingRequirementsTraversal() const { return m_compositingDirtyBits.contains(Compositing::HasDescendantNeedingRequirementsTraversal); } |
| bool hasDescendantNeedingUpdateBackingOrHierarchyTraversal() const { return m_compositingDirtyBits.contains(Compositing::HasDescendantNeedingBackingOrHierarchyTraversal); } |
| |
| bool needsCompositingPaintOrderChildrenUpdate() const { return m_compositingDirtyBits.contains(Compositing::NeedsPaintOrderChildrenUpdate); } |
| bool needsPostLayoutCompositingUpdate() const { return m_compositingDirtyBits.contains(Compositing::NeedsPostLayoutUpdate); } |
| bool descendantsNeedCompositingRequirementsTraversal() const { return m_compositingDirtyBits.contains(Compositing::DescendantsNeedRequirementsTraversal); } |
| bool subsequentLayersNeedCompositingRequirementsTraversal() const { return m_compositingDirtyBits.contains(Compositing::SubsequentLayersNeedRequirementsTraversal); } |
| |
| bool needsCompositingLayerConnection() const { return m_compositingDirtyBits.contains(Compositing::NeedsLayerConnection); } |
| bool needsCompositingGeometryUpdate() const { return m_compositingDirtyBits.contains(Compositing::NeedsGeometryUpdate); } |
| bool needsCompositingConfigurationUpdate() const { return m_compositingDirtyBits.contains(Compositing::NeedsConfigurationUpdate); } |
| bool needsScrollingTreeUpdate() const { return m_compositingDirtyBits.contains(Compositing::NeedsScrollingTreeUpdate); } |
| bool childrenNeedCompositingGeometryUpdate() const { return m_compositingDirtyBits.contains(Compositing::ChildrenNeedGeometryUpdate); } |
| bool descendantsNeedUpdateBackingAndHierarchyTraversal() const { return m_compositingDirtyBits.contains(Compositing::DescendantsNeedBackingAndHierarchyTraversal); } |
| |
| template<Compositing V> |
| void setRequirementsTraversalDirtyBit() |
| { |
| m_compositingDirtyBits.add(V); |
| setAncestorsHaveCompositingDirtyFlag(Compositing::HasDescendantNeedingRequirementsTraversal); |
| } |
| |
| void setNeedsCompositingPaintOrderChildrenUpdate() { setRequirementsTraversalDirtyBit<Compositing::NeedsPaintOrderChildrenUpdate>(); } |
| void setNeedsPostLayoutCompositingUpdate() { setRequirementsTraversalDirtyBit<Compositing::NeedsPostLayoutUpdate>(); } |
| void setDescendantsNeedCompositingRequirementsTraversal() { setRequirementsTraversalDirtyBit<Compositing::DescendantsNeedRequirementsTraversal>(); } |
| void setSubsequentLayersNeedCompositingRequirementsTraversal() { setRequirementsTraversalDirtyBit<Compositing::SubsequentLayersNeedRequirementsTraversal>(); } |
| |
| void setNeedsPostLayoutCompositingUpdateOnAncestors() { setAncestorsHaveCompositingDirtyFlag(Compositing::NeedsPostLayoutUpdate); } |
| |
| template<Compositing V> |
| void setBackingAndHierarchyTraversalDirtyBit() |
| { |
| m_compositingDirtyBits.add(V); |
| setAncestorsHaveCompositingDirtyFlag(Compositing::HasDescendantNeedingBackingOrHierarchyTraversal); |
| } |
| |
| void setNeedsCompositingLayerConnection() { setBackingAndHierarchyTraversalDirtyBit<Compositing::NeedsLayerConnection>(); } |
| void setNeedsCompositingGeometryUpdate() { setBackingAndHierarchyTraversalDirtyBit<Compositing::NeedsGeometryUpdate>(); } |
| void setNeedsCompositingConfigurationUpdate() { setBackingAndHierarchyTraversalDirtyBit<Compositing::NeedsConfigurationUpdate>(); } |
| void setNeedsScrollingTreeUpdate() { setBackingAndHierarchyTraversalDirtyBit<Compositing::NeedsScrollingTreeUpdate>(); } |
| void setChildrenNeedCompositingGeometryUpdate() { setBackingAndHierarchyTraversalDirtyBit<Compositing::ChildrenNeedGeometryUpdate>(); } |
| void setDescendantsNeedUpdateBackingAndHierarchyTraversal() { setBackingAndHierarchyTraversalDirtyBit<Compositing::DescendantsNeedBackingAndHierarchyTraversal>(); } |
| |
| void setNeedsCompositingGeometryUpdateOnAncestors() { setAncestorsHaveCompositingDirtyFlag(Compositing::NeedsGeometryUpdate); } |
| |
| bool needsCompositingRequirementsTraversal() const { return m_compositingDirtyBits.containsAny(computeCompositingRequirementsFlags()); } |
| void clearCompositingRequirementsTraversalState() |
| { |
| m_compositingDirtyBits.remove(Compositing::HasDescendantNeedingRequirementsTraversal); |
| m_compositingDirtyBits.remove(computeCompositingRequirementsFlags()); |
| } |
| |
| bool needsUpdateBackingOrHierarchyTraversal() const { return m_compositingDirtyBits.containsAny(updateBackingOrHierarchyFlags()); } |
| void clearUpdateBackingOrHierarchyTraversalState() |
| { |
| m_compositingDirtyBits.remove(Compositing::HasDescendantNeedingBackingOrHierarchyTraversal); |
| m_compositingDirtyBits.remove(updateBackingOrHierarchyFlags()); |
| } |
| |
| bool needsAnyCompositingTraversal() const { return !m_compositingDirtyBits.isEmpty(); } |
| void clearCompositingPaintOrderState() { m_compositingDirtyBits = { }; } |
| |
| class LayerList { |
| friend class RenderLayer; |
| public: |
| using iterator = RenderLayer**; |
| using const_iterator = RenderLayer * const *; |
| using reverse_iterator = std::reverse_iterator<iterator>; |
| using const_reverse_iterator = std::reverse_iterator<const_iterator>; |
| |
| iterator begin() { return m_layerList ? m_layerList->begin() : nullptr; } |
| iterator end() { return m_layerList ? m_layerList->end() : nullptr; } |
| |
| reverse_iterator rbegin() { return reverse_iterator(end()); } |
| reverse_iterator rend() { return reverse_iterator(begin()); } |
| |
| const_iterator begin() const { return m_layerList ? m_layerList->begin() : nullptr; } |
| const_iterator end() const { return m_layerList ? m_layerList->end() : nullptr; } |
| |
| const_reverse_iterator rbegin() const { return const_reverse_iterator(end()); } |
| const_reverse_iterator rend() const { return const_reverse_iterator(begin()); } |
| |
| size_t size() const { return m_layerList ? m_layerList->size() : 0; } |
| |
| private: |
| LayerList(Vector<RenderLayer*>* layerList) |
| : m_layerList(layerList) |
| { |
| } |
| |
| Vector<RenderLayer*>* m_layerList; |
| }; |
| |
| LayerList normalFlowLayers() const |
| { |
| ASSERT(!m_normalFlowListDirty); |
| return LayerList(m_normalFlowList.get()); |
| } |
| |
| LayerList positiveZOrderLayers() const |
| { |
| ASSERT(!m_zOrderListsDirty); |
| ASSERT(isStackingContext() || !m_posZOrderList); |
| return LayerList(m_posZOrderList.get()); |
| } |
| |
| bool hasNegativeZOrderLayers() const |
| { |
| return m_negZOrderList && m_negZOrderList->size(); |
| } |
| |
| LayerList negativeZOrderLayers() const |
| { |
| ASSERT(!m_zOrderListsDirty); |
| ASSERT(isStackingContext() || !m_negZOrderList); |
| return LayerList(m_negZOrderList.get()); |
| } |
| |
| // Update our normal and z-index lists. |
| void updateLayerListsIfNeeded(); |
| void updateDescendantDependentFlags(); |
| bool descendantDependentFlagsAreDirty() const |
| { |
| return m_visibleDescendantStatusDirty || m_visibleContentStatusDirty || m_hasSelfPaintingLayerDescendantDirty |
| #if ENABLE(CSS_COMPOSITING) |
| || m_hasNotIsolatedBlendingDescendantsStatusDirty |
| #endif |
| ; |
| } |
| |
| void repaintIncludingDescendants(); |
| |
| // Indicate that the layer contents need to be repainted. Only has an effect |
| // if layer compositing is being used. |
| void setBackingNeedsRepaint(GraphicsLayer::ShouldClipToLayer = GraphicsLayer::ClipToLayer); |
| |
| // The rect is in the coordinate space of the layer's render object. |
| void setBackingNeedsRepaintInRect(const LayoutRect&, GraphicsLayer::ShouldClipToLayer = GraphicsLayer::ClipToLayer); |
| void repaintIncludingNonCompositingDescendants(RenderLayerModelObject* repaintContainer); |
| |
| void styleChanged(StyleDifference, const RenderStyle* oldStyle); |
| |
| RenderMarquee* marquee() const { return m_marquee.get(); } |
| |
| bool isSelfPaintingLayer() const { return m_isSelfPaintingLayer; } |
| |
| bool cannotBlitToWindow() const; |
| |
| bool isTransparent() const { return renderer().isTransparent() || renderer().hasMask(); } |
| |
| bool hasReflection() const { return renderer().hasReflection(); } |
| bool isReflection() const { return renderer().isReplica(); } |
| RenderReplica* reflection() const { return m_reflection.get(); } |
| RenderLayer* reflectionLayer() const; |
| bool isReflectionLayer(const RenderLayer&) const; |
| |
| const LayoutPoint& location() const { return m_topLeft; } |
| void setLocation(const LayoutPoint& p) { m_topLeft = p; } |
| |
| const IntSize& size() const { return m_layerSize; } |
| void setSize(const IntSize& size) { m_layerSize = size; } // Only public for RenderTreeAsText. |
| |
| LayoutRect rect() const { return LayoutRect(location(), size()); } |
| |
| IntSize visibleSize() const final; |
| IntSize contentsSize() const final; |
| IntSize reachableTotalContentsSize() const final; |
| |
| int scrollWidth() const; |
| int scrollHeight() const; |
| |
| void panScrollFromPoint(const IntPoint&); |
| |
| // Scrolling methods for layers that can scroll their overflow. |
| void scrollByRecursively(const IntSize& delta, ScrollableArea** scrolledArea = nullptr); |
| |
| bool requestScrollPositionUpdate(const ScrollPosition&, ScrollType = ScrollType::User, ScrollClamping = ScrollClamping::Clamped) final; |
| |
| WEBCORE_EXPORT void scrollToOffset(const ScrollOffset&, ScrollType = ScrollType::Programmatic, ScrollClamping = ScrollClamping::Clamped); |
| WEBCORE_EXPORT void scrollToOffsetWithAnimation(const ScrollOffset&, ScrollType = ScrollType::Programmatic, ScrollClamping = ScrollClamping::Clamped); |
| |
| void scrollToXPosition(int x, ScrollType, ScrollClamping = ScrollClamping::Clamped, AnimatedScroll = AnimatedScroll::No); |
| void scrollToYPosition(int y, ScrollType, ScrollClamping = ScrollClamping::Clamped, AnimatedScroll = AnimatedScroll::No); |
| void setScrollPosition(const ScrollPosition&, ScrollType, ScrollClamping = ScrollClamping::Clamped, AnimatedScroll = AnimatedScroll::No); |
| |
| // These are only used by marquee. |
| void scrollToXOffset(int x) { scrollToOffset(ScrollOffset(x, scrollOffset().y()), ScrollType::Programmatic, ScrollClamping::Unclamped); } |
| void scrollToYOffset(int y) { scrollToOffset(ScrollOffset(scrollOffset().x(), y), ScrollType::Programmatic, ScrollClamping::Unclamped); } |
| |
| void setPostLayoutScrollPosition(Optional<ScrollPosition>); |
| void applyPostLayoutScrollPositionIfNeeded(); |
| |
| // Returns the nearest enclosing layer that is scrollable. |
| // FIXME: This can return the RenderView's layer when callers probably want the FrameView as a ScrollableArea. |
| RenderLayer* enclosingScrollableLayer(IncludeSelfOrNot, CrossFrameBoundaries) const; |
| |
| void availableContentSizeChanged(AvailableSizeChangeReason) final; |
| |
| // "absoluteRect" is in scaled document coordinates. |
| void scrollRectToVisible(const LayoutRect& absoluteRect, bool insideFixed, const ScrollRectToVisibleOptions&); |
| |
| bool scrollsOverflow() const; |
| bool hasScrollableHorizontalOverflow() const; |
| bool hasScrollableVerticalOverflow() const; |
| bool hasScrollbars() const { return m_hBar || m_vBar; } |
| void setHasHorizontalScrollbar(bool); |
| void setHasVerticalScrollbar(bool); |
| |
| Ref<Scrollbar> createScrollbar(ScrollbarOrientation); |
| void destroyScrollbar(ScrollbarOrientation); |
| |
| bool hasHorizontalScrollbar() const { return horizontalScrollbar(); } |
| bool hasVerticalScrollbar() const { return verticalScrollbar(); } |
| |
| bool horizontalScrollbarHiddenByStyle() const final; |
| bool verticalScrollbarHiddenByStyle() const final; |
| |
| // ScrollableArea overrides |
| ScrollPosition scrollPosition() const final { return m_scrollPosition; } |
| |
| Scrollbar* horizontalScrollbar() const final { return m_hBar.get(); } |
| Scrollbar* verticalScrollbar() const final { return m_vBar.get(); } |
| ScrollableArea* enclosingScrollableArea() const final; |
| |
| bool isScrollableOrRubberbandable() final; |
| bool hasScrollableOrRubberbandableAncestor() final; |
| bool useDarkAppearance() const final; |
| #if ENABLE(CSS_SCROLL_SNAP) |
| void updateSnapOffsets() final; |
| #endif |
| |
| bool requiresScrollPositionReconciliation() const { return m_requiresScrollPositionReconciliation; } |
| void setRequiresScrollPositionReconciliation(bool requiresReconciliation = true) { m_requiresScrollPositionReconciliation = requiresReconciliation; } |
| |
| #if PLATFORM(IOS_FAMILY) |
| #if ENABLE(IOS_TOUCH_EVENTS) |
| bool handleTouchEvent(const PlatformTouchEvent&) final; |
| #endif |
| |
| void didStartScroll() final; |
| void didEndScroll() final; |
| void didUpdateScroll() final; |
| #endif |
| |
| // Returns true when the layer could do touch scrolling, but doesn't look at whether there is actually scrollable overflow. |
| bool canUseCompositedScrolling() const; |
| // Returns true when there is actually scrollable overflow (requires layout to be up-to-date). |
| bool hasCompositedScrollableOverflow() const { return m_hasCompositedScrollableOverflow; } |
| |
| int verticalScrollbarWidth(OverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize) const; |
| int horizontalScrollbarHeight(OverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize) const; |
| |
| bool hasOverflowControls() const; |
| bool isPointInResizeControl(IntPoint localPoint) const; |
| bool hitTestOverflowControls(HitTestResult&, const IntPoint& localPoint); |
| IntSize offsetFromResizeCorner(const IntPoint& localPoint) const; |
| |
| void paintOverflowControls(GraphicsContext&, const IntPoint&, const IntRect& damageRect, bool paintingOverlayControls = false); |
| void paintScrollCorner(GraphicsContext&, const IntPoint&, const IntRect& damageRect); |
| void paintResizer(GraphicsContext&, const LayoutPoint&, const LayoutRect& damageRect); |
| |
| void updateScrollInfoAfterLayout(); |
| |
| bool scroll(ScrollDirection, ScrollGranularity, float multiplier = 1); |
| void autoscroll(const IntPoint&); |
| |
| bool canResize() const; |
| void resize(const PlatformMouseEvent&, const LayoutSize&); |
| bool inResizeMode() const { return m_inResizeMode; } |
| void setInResizeMode(bool b) { m_inResizeMode = b; } |
| |
| bool isRenderViewLayer() const { return m_isRenderViewLayer; } |
| bool isForcedStackingContext() const { return m_forcedStackingContext; } |
| bool isOpportunisticStackingContext() const { return m_isOpportunisticStackingContext; } |
| |
| RenderLayerCompositor& compositor() const; |
| |
| // Notification from the renderer that its content changed (e.g. current frame of image changed). |
| // Allows updates of layer content without repainting. |
| void contentChanged(ContentChangeType); |
| |
| bool canRender3DTransforms() const; |
| |
| void updateLayerPositionsAfterStyleChange(); |
| void updateLayerPositionsAfterLayout(bool isRelayoutingSubtree, bool didFullRepaint); |
| |
| void updateLayerPositionsAfterOverflowScroll(); |
| void updateLayerPositionsAfterDocumentScroll(); |
| |
| bool hasCompositedLayerInEnclosingPaginationChain() const; |
| enum PaginationInclusionMode { ExcludeCompositedPaginatedLayers, IncludeCompositedPaginatedLayers }; |
| RenderLayer* enclosingPaginationLayer(PaginationInclusionMode mode) const |
| { |
| if (mode == ExcludeCompositedPaginatedLayers && hasCompositedLayerInEnclosingPaginationChain()) |
| return nullptr; |
| return m_enclosingPaginationLayer.get(); |
| } |
| |
| void updateTransform(); |
| |
| #if ENABLE(CSS_COMPOSITING) |
| void updateBlendMode(); |
| void willRemoveChildWithBlendMode(); |
| #endif |
| |
| const LayoutSize& offsetForInFlowPosition() const { return m_offsetForInFlowPosition; } |
| |
| void clearClipRectsIncludingDescendants(ClipRectsType typeToClear = AllClipRectTypes); |
| void clearClipRects(ClipRectsType typeToClear = AllClipRectTypes); |
| |
| void addBlockSelectionGapsBounds(const LayoutRect&); |
| void clearBlockSelectionGapsBounds(); |
| void repaintBlockSelectionGaps(); |
| |
| // FIXME: We should ASSERT(!m_visibleContentStatusDirty) here, but see https://bugs.webkit.org/show_bug.cgi?id=71044 |
| // ditto for hasVisibleDescendant(), see https://bugs.webkit.org/show_bug.cgi?id=71277 |
| bool hasVisibleContent() const { return m_hasVisibleContent; } |
| bool hasVisibleDescendant() const { return m_hasVisibleDescendant; } |
| |
| void setHasVisibleContent(); |
| void dirtyVisibleContentStatus(); |
| |
| bool hasVisibleBoxDecorationsOrBackground() const; |
| bool hasVisibleBoxDecorations() const; |
| |
| bool behavesAsFixed() const { return m_behavesAsFixed; } |
| |
| struct PaintedContentRequest { |
| void makeStatesUndetermined() |
| { |
| if (hasPaintedContent == RequestState::Unknown) |
| hasPaintedContent = RequestState::Undetermined; |
| |
| if (hasSubpixelAntialiasedText == RequestState::Unknown) |
| hasSubpixelAntialiasedText = RequestState::Undetermined; |
| } |
| |
| void setHasPaintedContent() { hasPaintedContent = RequestState::True; } |
| void setHasSubpixelAntialiasedText() { hasSubpixelAntialiasedText = RequestState::True; } |
| |
| bool needToDeterminePaintedContentState() const { return hasPaintedContent == RequestState::Unknown; } |
| bool needToDetermineSubpixelAntialiasedTextState() const { return hasSubpixelAntialiasedText == RequestState::Unknown; } |
| |
| bool probablyHasPaintedContent() const { return hasPaintedContent == RequestState::True || hasPaintedContent == RequestState::Undetermined; } |
| bool probablyHasSubpixelAntialiasedText() const { return hasSubpixelAntialiasedText == RequestState::True || hasSubpixelAntialiasedText == RequestState::Undetermined; } |
| |
| bool isSatisfied() const { return hasPaintedContent != RequestState::Unknown && hasSubpixelAntialiasedText != RequestState::Unknown; } |
| |
| RequestState hasPaintedContent { RequestState::Unknown }; |
| RequestState hasSubpixelAntialiasedText { RequestState::DontCare }; |
| }; |
| |
| // Returns true if this layer has visible content (ignoring any child layers). |
| bool isVisuallyNonEmpty(PaintedContentRequest* = nullptr) const; |
| // True if this layer container renderers that paint. |
| bool hasNonEmptyChildRenderers(PaintedContentRequest&) const; |
| |
| // FIXME: We should ASSERT(!m_hasSelfPaintingLayerDescendantDirty); here but we hit the same bugs as visible content above. |
| // Part of the issue is with subtree relayout: we don't check if our ancestors have some descendant flags dirty, missing some updates. |
| bool hasSelfPaintingLayerDescendant() const { return m_hasSelfPaintingLayerDescendant; } |
| |
| bool ancestorLayerIsInContainingBlockChain(const RenderLayer& ancestor, const RenderLayer* checkLimit = nullptr) const; |
| |
| // Gets the nearest enclosing positioned ancestor layer (also includes |
| // the <html> layer and the root layer). |
| RenderLayer* enclosingAncestorForPosition(PositionType) const; |
| |
| RenderLayer* enclosingLayerInContainingBlockOrder() const; |
| |
| // The layer relative to which clipping rects for this layer are computed. |
| RenderLayer* clippingRootForPainting() const; |
| |
| RenderLayer* enclosingOverflowClipLayer(IncludeSelfOrNot) const; |
| |
| // Enclosing compositing layer; if includeSelf is true, may return this. |
| RenderLayer* enclosingCompositingLayer(IncludeSelfOrNot = IncludeSelf) const; |
| RenderLayer* enclosingCompositingLayerForRepaint(IncludeSelfOrNot = IncludeSelf) const; |
| // Ancestor compositing layer, excluding this. |
| RenderLayer* ancestorCompositingLayer() const { return enclosingCompositingLayer(ExcludeSelf); } |
| |
| RenderLayer* enclosingFilterLayer(IncludeSelfOrNot = IncludeSelf) const; |
| RenderLayer* enclosingFilterRepaintLayer() const; |
| void setFilterBackendNeedsRepaintingInRect(const LayoutRect&); |
| bool hasAncestorWithFilterOutsets() const; |
| |
| bool canUseOffsetFromAncestor() const |
| { |
| // FIXME: This really needs to know if there are transforms on this layer and any of the layers |
| // between it and the ancestor in question. |
| return !renderer().hasTransform() && !renderer().isSVGRoot(); |
| } |
| |
| // FIXME: adjustForColumns allows us to position compositing layers in columns correctly, but eventually they need to be split across columns too. |
| enum ColumnOffsetAdjustment { DontAdjustForColumns, AdjustForColumns }; |
| void convertToPixelSnappedLayerCoords(const RenderLayer* ancestorLayer, IntPoint& location, ColumnOffsetAdjustment adjustForColumns = DontAdjustForColumns) const; |
| LayoutPoint convertToLayerCoords(const RenderLayer* ancestorLayer, const LayoutPoint&, ColumnOffsetAdjustment adjustForColumns = DontAdjustForColumns) const; |
| LayoutSize offsetFromAncestor(const RenderLayer*, ColumnOffsetAdjustment = DontAdjustForColumns) const; |
| |
| int zIndex() const { return renderer().style().usedZIndex(); } |
| |
| enum class PaintLayerFlag : uint16_t { |
| HaveTransparency = 1 << 0, |
| AppliedTransform = 1 << 1, |
| TemporaryClipRects = 1 << 2, |
| PaintingReflection = 1 << 3, |
| PaintingOverlayScrollbars = 1 << 4, |
| PaintingCompositingBackgroundPhase = 1 << 5, |
| PaintingCompositingForegroundPhase = 1 << 6, |
| PaintingCompositingMaskPhase = 1 << 7, |
| PaintingCompositingClipPathPhase = 1 << 8, |
| PaintingCompositingScrollingPhase = 1 << 9, |
| PaintingOverflowContents = 1 << 10, |
| PaintingRootBackgroundOnly = 1 << 11, |
| PaintingSkipRootBackground = 1 << 12, |
| PaintingChildClippingMaskPhase = 1 << 13, |
| CollectingEventRegion = 1 << 14, |
| }; |
| static constexpr OptionSet<PaintLayerFlag> paintLayerPaintingCompositingAllPhasesFlags() { return { PaintLayerFlag::PaintingCompositingBackgroundPhase, PaintLayerFlag::PaintingCompositingForegroundPhase }; } |
| |
| enum class SecurityOriginPaintPolicy { AnyOrigin, AccessibleOriginOnly }; |
| |
| // The two main functions that use the layer system. The paint method |
| // paints the layers that intersect the damage rect from back to |
| // front. The hitTest method looks for mouse events by walking |
| // layers that intersect the point from front to back. |
| void paint(GraphicsContext&, const LayoutRect& damageRect, const LayoutSize& subpixelOffset = LayoutSize(), OptionSet<PaintBehavior> = PaintBehavior::Normal, |
| RenderObject* subtreePaintRoot = nullptr, OptionSet<PaintLayerFlag> = { }, SecurityOriginPaintPolicy = SecurityOriginPaintPolicy::AnyOrigin, EventRegionContext* = nullptr); |
| bool hitTest(const HitTestRequest&, HitTestResult&); |
| bool hitTest(const HitTestRequest&, const HitTestLocation&, HitTestResult&); |
| void paintOverlayScrollbars(GraphicsContext&, const LayoutRect& damageRect, OptionSet<PaintBehavior>, RenderObject* subtreePaintRoot = nullptr); |
| |
| struct ClipRectsContext { |
| ClipRectsContext(const RenderLayer* inRootLayer, ClipRectsType inClipRectsType, OverlayScrollbarSizeRelevancy inOverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize, ShouldRespectOverflowClip inRespectOverflowClip = RespectOverflowClip) |
| : rootLayer(inRootLayer) |
| , clipRectsType(inClipRectsType) |
| , overlayScrollbarSizeRelevancy(inOverlayScrollbarSizeRelevancy) |
| , respectOverflowClip(inRespectOverflowClip) |
| { } |
| const RenderLayer* rootLayer; |
| ClipRectsType clipRectsType; |
| OverlayScrollbarSizeRelevancy overlayScrollbarSizeRelevancy; |
| ShouldRespectOverflowClip respectOverflowClip; |
| }; |
| |
| // This method figures out our layerBounds in coordinates relative to |
| // |rootLayer}. It also computes our background and foreground clip rects |
| // for painting/event handling. |
| // Pass offsetFromRoot if known. |
| void calculateRects(const ClipRectsContext&, const LayoutRect& paintDirtyRect, LayoutRect& layerBounds, |
| ClipRect& backgroundRect, ClipRect& foregroundRect, const LayoutSize& offsetFromRoot) const; |
| |
| // Public just for RenderTreeAsText. |
| void collectFragments(LayerFragments&, const RenderLayer* rootLayer, const LayoutRect& dirtyRect, |
| PaginationInclusionMode, |
| ClipRectsType, OverlayScrollbarSizeRelevancy inOverlayScrollbarSizeRelevancy, ShouldRespectOverflowClip, const LayoutSize& offsetFromRoot, |
| const LayoutRect* layerBoundingBox = nullptr, ShouldApplyRootOffsetToFragments = IgnoreRootOffsetForFragments); |
| |
| LayoutRect childrenClipRect() const; // Returns the foreground clip rect of the layer in the document's coordinate space. |
| LayoutRect selfClipRect() const; // Returns the background clip rect of the layer in the document's coordinate space. |
| LayoutRect localClipRect(bool& clipExceedsBounds) const; // Returns the background clip rect of the layer in the local coordinate space. |
| |
| bool clipCrossesPaintingBoundary() const; |
| |
| // Pass offsetFromRoot if known. |
| bool intersectsDamageRect(const LayoutRect& layerBounds, const LayoutRect& damageRect, const RenderLayer* rootLayer, const LayoutSize& offsetFromRoot, const Optional<LayoutRect>& cachedBoundingBox = WTF::nullopt) const; |
| |
| enum CalculateLayerBoundsFlag { |
| IncludeSelfTransform = 1 << 0, |
| UseLocalClipRectIfPossible = 1 << 1, |
| IncludeFilterOutsets = 1 << 2, |
| IncludePaintedFilterOutsets = 1 << 3, |
| ExcludeHiddenDescendants = 1 << 4, |
| DontConstrainForMask = 1 << 5, |
| IncludeCompositedDescendants = 1 << 6, |
| UseFragmentBoxesExcludingCompositing = 1 << 7, |
| UseFragmentBoxesIncludingCompositing = 1 << 8, |
| }; |
| static constexpr OptionSet<CalculateLayerBoundsFlag> defaultCalculateLayerBoundsFlags() { return { IncludeSelfTransform, UseLocalClipRectIfPossible, IncludePaintedFilterOutsets, UseFragmentBoxesExcludingCompositing }; } |
| |
| // Bounding box relative to some ancestor layer. Pass offsetFromRoot if known. |
| LayoutRect boundingBox(const RenderLayer* rootLayer, const LayoutSize& offsetFromRoot = LayoutSize(), OptionSet<CalculateLayerBoundsFlag> = { }) const; |
| // Bounding box in the coordinates of this layer. |
| LayoutRect localBoundingBox(OptionSet<CalculateLayerBoundsFlag> = { }) const; |
| // Deprecated: Pixel snapped bounding box relative to the root. |
| WEBCORE_EXPORT IntRect absoluteBoundingBox() const; |
| // Device pixel snapped bounding box relative to the root. absoluteBoundingBox() callers will be directed to this. |
| FloatRect absoluteBoundingBoxForPainting() const; |
| |
| // Bounds used for layer overlap testing in RenderLayerCompositor. |
| LayoutRect overlapBounds() const; |
| |
| // Takes transform animations into account, returning true if they could be cheaply computed. |
| // Unlike overlapBounds, these bounds include descendant layers. |
| bool getOverlapBoundsIncludingChildrenAccountingForTransformAnimations(LayoutRect&, OptionSet<CalculateLayerBoundsFlag> additionalFlags = { }) const; |
| |
| // If true, this layer's children are included in its bounds for overlap testing. |
| // We can't rely on the children's positions if this layer has a filter that could have moved the children's pixels around. |
| bool overlapBoundsIncludeChildren() const { return hasFilter() && renderer().style().filter().hasFilterThatMovesPixels(); } |
| |
| // Can pass offsetFromRoot if known. |
| LayoutRect calculateLayerBounds(const RenderLayer* ancestorLayer, const LayoutSize& offsetFromRoot, OptionSet<CalculateLayerBoundsFlag> = defaultCalculateLayerBoundsFlags()) const; |
| |
| // Return a cached repaint rect, computed relative to the layer renderer's containerForRepaint. |
| bool hasComputedRepaintRects() const { return renderer().hasRepaintLayoutRects(); } |
| LayoutRect repaintRectIncludingNonCompositingDescendants() const; |
| |
| void setRepaintStatus(RepaintStatus status) { m_repaintStatus = status; } |
| RepaintStatus repaintStatus() const { return static_cast<RepaintStatus>(m_repaintStatus); } |
| |
| LayoutUnit staticInlinePosition() const { return m_staticInlinePosition; } |
| LayoutUnit staticBlockPosition() const { return m_staticBlockPosition; } |
| |
| void setStaticInlinePosition(LayoutUnit position) { m_staticInlinePosition = position; } |
| void setStaticBlockPosition(LayoutUnit position) { m_staticBlockPosition = position; } |
| |
| #if PLATFORM(IOS_FAMILY) |
| bool adjustForIOSCaretWhenScrolling() const { return m_adjustForIOSCaretWhenScrolling; } |
| void setAdjustForIOSCaretWhenScrolling(bool adjustForIOSCaretWhenScrolling) { m_adjustForIOSCaretWhenScrolling = adjustForIOSCaretWhenScrolling; } |
| #endif |
| |
| bool hasTransform() const { return renderer().hasTransform(); } |
| // Note that this transform has the transform-origin baked in. |
| TransformationMatrix* transform() const { return m_transform.get(); } |
| // currentTransform computes a transform which takes accelerated animations into account. The |
| // resulting transform has transform-origin baked in. If the layer does not have a transform, |
| // returns the identity matrix. |
| TransformationMatrix currentTransform(RenderStyle::ApplyTransformOrigin = RenderStyle::IncludeTransformOrigin) const; |
| TransformationMatrix renderableTransform(OptionSet<PaintBehavior>) const; |
| |
| // Get the perspective transform, which is applied to transformed sublayers. |
| // Returns true if the layer has a -webkit-perspective. |
| // Note that this transform has the perspective-origin baked in. |
| TransformationMatrix perspectiveTransform(const LayoutRect& layerRect) const; |
| FloatPoint perspectiveOrigin() const; |
| bool preserves3D() const { return renderer().style().transformStyle3D() == TransformStyle3D::Preserve3D; } |
| bool has3DTransform() const { return m_transform && !m_transform->isAffine(); } |
| bool hasTransformedAncestor() const { return m_hasTransformedAncestor; } |
| |
| bool hasFilter() const { return renderer().hasFilter(); } |
| bool hasFilterOutsets() const { return !filterOutsets().isZero(); } |
| IntOutsets filterOutsets() const; |
| bool hasBackdropFilter() const |
| { |
| #if ENABLE(FILTERS_LEVEL_2) |
| return renderer().hasBackdropFilter(); |
| #else |
| return false; |
| #endif |
| } |
| |
| #if ENABLE(CSS_COMPOSITING) |
| bool hasBlendMode() const { return renderer().hasBlendMode(); } |
| BlendMode blendMode() const { return static_cast<BlendMode>(m_blendMode); } |
| |
| bool isolatesCompositedBlending() const { return m_hasNotIsolatedCompositedBlendingDescendants && isCSSStackingContext(); } |
| bool hasNotIsolatedCompositedBlendingDescendants() const { return m_hasNotIsolatedCompositedBlendingDescendants; } |
| void setHasNotIsolatedCompositedBlendingDescendants(bool hasNotIsolatedCompositedBlendingDescendants) |
| { |
| m_hasNotIsolatedCompositedBlendingDescendants = hasNotIsolatedCompositedBlendingDescendants; |
| } |
| |
| bool isolatesBlending() const { return hasNotIsolatedBlendingDescendants() && isCSSStackingContext(); } |
| |
| // FIXME: We should ASSERT(!m_hasNotIsolatedBlendingDescendantsStatusDirty); here but we hit the same bugs as visible content above. |
| bool hasNotIsolatedBlendingDescendants() const { return m_hasNotIsolatedBlendingDescendants; } |
| bool hasNotIsolatedBlendingDescendantsStatusDirty() const { return m_hasNotIsolatedBlendingDescendantsStatusDirty; } |
| #else |
| bool hasBlendMode() const { return false; } |
| bool isolatesCompositedBlending() const { return false; } |
| bool isolatesBlending() const { return false; } |
| bool hasNotIsolatedBlendingDescendantsStatusDirty() const { return false; } |
| #endif |
| |
| bool isComposited() const { return m_backing != nullptr; } |
| bool hasCompositingDescendant() const { return m_hasCompositingDescendant; } |
| bool hasCompositedMask() const; |
| bool hasCompositedNonContainedDescendants() const { return m_hasCompositedNonContainedDescendants; } |
| |
| // If non-null, a non-ancestor composited layer that this layer paints into (it is sharing its backing store with this layer). |
| RenderLayer* backingProviderLayer() const { return m_backingProviderLayer.get(); } |
| void setBackingProviderLayer(RenderLayer*); |
| void disconnectFromBackingProviderLayer(); |
| |
| bool paintsIntoProvidedBacking() const { return !!m_backingProviderLayer; } |
| |
| RenderLayerBacking* backing() const { return m_backing.get(); } |
| RenderLayerBacking* ensureBacking(); |
| void clearBacking(bool layerBeingDestroyed = false); |
| |
| GraphicsLayer* layerForHorizontalScrollbar() const final; |
| GraphicsLayer* layerForVerticalScrollbar() const final; |
| GraphicsLayer* layerForScrollCorner() const final; |
| |
| bool usesCompositedScrolling() const final; |
| bool usesAsyncScrolling() const final; |
| |
| bool hasCompositedScrollingAncestor() const { return m_hasCompositedScrollingAncestor; } |
| void setHasCompositedScrollingAncestor(bool hasCompositedScrollingAncestor) { m_hasCompositedScrollingAncestor = hasCompositedScrollingAncestor; } |
| |
| // Layers with the same ScrollingScope are scrolled by some common ancestor scroller. Used for async scrolling. |
| Optional<ScrollingScope> boxScrollingScope() const { return m_boxScrollingScope; } |
| Optional<ScrollingScope> contentsScrollingScope() const { return m_contentsScrollingScope; } |
| |
| bool paintsWithTransparency(OptionSet<PaintBehavior> paintBehavior) const |
| { |
| return (isTransparent() || hasBlendMode() || (isolatesBlending() && !renderer().isDocumentElementRenderer())) && ((paintBehavior & PaintBehavior::FlattenCompositingLayers) || !isComposited()); |
| } |
| |
| bool paintsWithTransform(OptionSet<PaintBehavior>) const; |
| bool shouldPaintMask(OptionSet<PaintBehavior>, OptionSet<PaintLayerFlag>) const; |
| bool shouldApplyClipPath(OptionSet<PaintBehavior>, OptionSet<PaintLayerFlag>) const; |
| |
| // Returns true if background phase is painted opaque in the given rect. |
| // The query rect is given in local coordinates. |
| bool backgroundIsKnownToBeOpaqueInRect(const LayoutRect&) const; |
| |
| bool scrollingMayRevealBackground() const; |
| |
| bool containsDirtyOverlayScrollbars() const { return m_containsDirtyOverlayScrollbars; } |
| void setContainsDirtyOverlayScrollbars(bool dirtyScrollbars) { m_containsDirtyOverlayScrollbars = dirtyScrollbars; } |
| |
| bool paintsWithFilters() const; |
| bool requiresFullLayerImageForFilters() const; |
| |
| Element* enclosingElement() const; |
| |
| enum ViewportConstrainedNotCompositedReason { |
| NoNotCompositedReason, |
| NotCompositedForBoundsOutOfView, |
| NotCompositedForNonViewContainer, |
| NotCompositedForNoVisibleContent, |
| }; |
| |
| void setViewportConstrainedNotCompositedReason(ViewportConstrainedNotCompositedReason reason) { m_viewportConstrainedNotCompositedReason = reason; } |
| ViewportConstrainedNotCompositedReason viewportConstrainedNotCompositedReason() const { return static_cast<ViewportConstrainedNotCompositedReason>(m_viewportConstrainedNotCompositedReason); } |
| |
| IndirectCompositingReason indirectCompositingReason() const { return static_cast<IndirectCompositingReason>(m_indirectCompositingReason); } |
| |
| bool isRenderFragmentedFlow() const { return renderer().isRenderFragmentedFlow(); } |
| bool isOutOfFlowRenderFragmentedFlow() const { return renderer().isOutOfFlowRenderFragmentedFlow(); } |
| bool isInsideFragmentedFlow() const { return renderer().fragmentedFlowState() != RenderObject::NotInsideFragmentedFlow; } |
| bool isDirtyRenderFragmentedFlow() const |
| { |
| ASSERT(isRenderFragmentedFlow()); |
| return zOrderListsDirty() || normalFlowListDirty(); |
| } |
| |
| RenderLayer* enclosingFragmentedFlowAncestor() const; |
| |
| bool shouldPlaceBlockDirectionScrollbarOnLeft() const final { return renderer().shouldPlaceBlockDirectionScrollbarOnLeft(); } |
| |
| WEBCORE_EXPORT void simulateFrequentPaint(); |
| bool paintingFrequently() const { return m_paintFrequencyTracker.paintingFrequently(); } |
| |
| WEBCORE_EXPORT bool isTransparentRespectingParentFrames() const; |
| |
| // Invalidation can fail if there is no enclosing compositing layer (e.g. nested iframe) |
| // or the layer does not maintain an event region. |
| enum class EventRegionInvalidationReason { Paint, SettingDidChange, Style, NonCompositedFrame }; |
| bool invalidateEventRegion(EventRegionInvalidationReason); |
| |
| String debugDescription() const final; |
| |
| private: |
| |
| void setNextSibling(RenderLayer* next) { m_next = next; } |
| void setPreviousSibling(RenderLayer* prev) { m_previous = prev; } |
| void setParent(RenderLayer*); |
| void setFirstChild(RenderLayer* first) { m_first = first; } |
| void setLastChild(RenderLayer* last) { m_last = last; } |
| |
| void updateAncestorDependentState(); |
| |
| void dirtyPaintOrderListsOnChildChange(RenderLayer&); |
| |
| bool shouldBeNormalFlowOnly() const; |
| bool shouldBeCSSStackingContext() const; |
| |
| // Return true if changed. |
| bool setIsNormalFlowOnly(bool); |
| |
| bool setIsOpportunisticStackingContext(bool); |
| bool setIsCSSStackingContext(bool); |
| |
| void isStackingContextChanged(); |
| |
| bool isDirtyStackingContext() const { return m_zOrderListsDirty && isStackingContext(); } |
| |
| void updateZOrderLists(); |
| void rebuildZOrderLists(); |
| void rebuildZOrderLists(std::unique_ptr<Vector<RenderLayer*>>&, std::unique_ptr<Vector<RenderLayer*>>&, OptionSet<Compositing>&); |
| void collectLayers(bool includeHiddenLayers, std::unique_ptr<Vector<RenderLayer*>>&, std::unique_ptr<Vector<RenderLayer*>>&, OptionSet<Compositing>&); |
| void clearZOrderLists(); |
| |
| void updateNormalFlowList(); |
| |
| struct LayerPaintingInfo { |
| LayerPaintingInfo(RenderLayer* inRootLayer, const LayoutRect& inDirtyRect, OptionSet<PaintBehavior> inPaintBehavior, const LayoutSize& inSubpixelOffset, RenderObject* inSubtreePaintRoot = nullptr, OverlapTestRequestMap* inOverlapTestRequests = nullptr, bool inRequireSecurityOriginAccessForWidgets = false) |
| : rootLayer(inRootLayer) |
| , subtreePaintRoot(inSubtreePaintRoot) |
| , paintDirtyRect(inDirtyRect) |
| , subpixelOffset(inSubpixelOffset) |
| , overlapTestRequests(inOverlapTestRequests) |
| , paintBehavior(inPaintBehavior) |
| , requireSecurityOriginAccessForWidgets(inRequireSecurityOriginAccessForWidgets) |
| { } |
| |
| RenderLayer* rootLayer; |
| RenderObject* subtreePaintRoot; // Only paint descendants of this object. |
| LayoutRect paintDirtyRect; // Relative to rootLayer; |
| LayoutSize subpixelOffset; |
| OverlapTestRequestMap* overlapTestRequests; // May be null. |
| OptionSet<PaintBehavior> paintBehavior; |
| bool requireSecurityOriginAccessForWidgets; |
| bool clipToDirtyRect { true }; |
| EventRegionContext* eventRegionContext { nullptr }; |
| }; |
| |
| // Compute, cache and return clip rects computed with the given layer as the root. |
| Ref<ClipRects> updateClipRects(const ClipRectsContext&); |
| // Compute and return the clip rects. If useCached is true, will used previously computed clip rects on ancestors |
| // (rather than computing them all from scratch up the parent chain). |
| void calculateClipRects(const ClipRectsContext&, ClipRects&) const; |
| ClipRects* clipRects(const ClipRectsContext&) const; |
| |
| void setAncestorChainHasSelfPaintingLayerDescendant(); |
| void dirtyAncestorChainHasSelfPaintingLayerDescendantStatus(); |
| |
| void computeRepaintRects(const RenderLayerModelObject* repaintContainer, const RenderGeometryMap* = nullptr); |
| void computeRepaintRectsIncludingDescendants(); |
| void clearRepaintRects(); |
| |
| LayoutRect clipRectRelativeToAncestor(RenderLayer* ancestor, LayoutSize offsetFromAncestor, const LayoutRect& constrainingRect) const; |
| |
| void clipToRect(GraphicsContext&, const LayerPaintingInfo&, OptionSet<PaintBehavior>, const ClipRect&, BorderRadiusClippingRule = IncludeSelfForBorderRadius); |
| void restoreClip(GraphicsContext&, const LayerPaintingInfo&, const ClipRect&); |
| |
| bool shouldRepaintAfterLayout() const; |
| |
| void updateSelfPaintingLayer(); |
| |
| void updateScrollbarsAfterStyleChange(const RenderStyle* oldStyle); |
| void updateScrollbarsAfterLayout(); |
| |
| enum UpdateLayerPositionsFlag { |
| CheckForRepaint = 1 << 0, |
| NeedsFullRepaintInBacking = 1 << 1, |
| ContainingClippingLayerChangedSize = 1 << 2, |
| UpdatePagination = 1 << 3, |
| SeenFixedLayer = 1 << 4, |
| SeenTransformedLayer = 1 << 5, |
| Seen3DTransformedLayer = 1 << 6, |
| SeenCompositedScrollingLayer = 1 << 7, |
| }; |
| static OptionSet<UpdateLayerPositionsFlag> flagsForUpdateLayerPositions(RenderLayer& startingLayer); |
| |
| // Returns true if the position changed. |
| bool updateLayerPosition(OptionSet<UpdateLayerPositionsFlag>* = nullptr); |
| |
| void updateLayerPositions(RenderGeometryMap*, OptionSet<UpdateLayerPositionsFlag>); |
| |
| enum UpdateLayerPositionsAfterScrollFlag { |
| IsOverflowScroll = 1 << 0, |
| HasSeenViewportConstrainedAncestor = 1 << 1, |
| HasSeenAncestorWithOverflowClip = 1 << 2, |
| HasChangedAncestor = 1 << 3, |
| }; |
| void updateLayerPositionsAfterScroll(RenderGeometryMap*, OptionSet<UpdateLayerPositionsAfterScrollFlag> = { }); |
| |
| ScrollOffset clampScrollOffset(const ScrollOffset&) const; |
| |
| RenderLayer* enclosingPaginationLayerInSubtree(const RenderLayer* rootLayer, PaginationInclusionMode) const; |
| |
| LayoutPoint renderBoxLocation() const { return is<RenderBox>(renderer()) ? downcast<RenderBox>(renderer()).location() : LayoutPoint(); } |
| |
| bool setupFontSubpixelQuantization(GraphicsContext&, bool& didQuantizeFonts); |
| |
| Path computeClipPath(const LayoutSize& offsetFromRoot, LayoutRect& rootRelativeBounds, WindRule&) const; |
| |
| bool setupClipPath(GraphicsContext&, const LayerPaintingInfo&, const LayoutSize& offsetFromRoot, Optional<LayoutRect>& rootRelativeBounds); |
| |
| void ensureLayerFilters(); |
| void clearLayerFilters(); |
| |
| RenderLayerFilters* filtersForPainting(GraphicsContext&, OptionSet<PaintLayerFlag>) const; |
| GraphicsContext* setupFilters(GraphicsContext& destinationContext, LayerPaintingInfo&, OptionSet<PaintLayerFlag>, const LayoutSize& offsetFromRoot, Optional<LayoutRect>& rootRelativeBounds); |
| void applyFilters(GraphicsContext& originalContext, const LayerPaintingInfo&, OptionSet<PaintBehavior>, const LayerFragments&); |
| |
| void paintLayer(GraphicsContext&, const LayerPaintingInfo&, OptionSet<PaintLayerFlag>); |
| void paintLayerWithEffects(GraphicsContext&, const LayerPaintingInfo&, OptionSet<PaintLayerFlag>); |
| |
| void paintLayerContentsAndReflection(GraphicsContext&, const LayerPaintingInfo&, OptionSet<PaintLayerFlag>); |
| void paintLayerByApplyingTransform(GraphicsContext&, const LayerPaintingInfo&, OptionSet<PaintLayerFlag>, const LayoutSize& translationOffset = LayoutSize()); |
| void paintLayerContents(GraphicsContext&, const LayerPaintingInfo&, OptionSet<PaintLayerFlag>); |
| void paintList(LayerList, GraphicsContext&, const LayerPaintingInfo&, OptionSet<PaintLayerFlag>); |
| |
| void updatePaintingInfoForFragments(LayerFragments&, const LayerPaintingInfo&, OptionSet<PaintLayerFlag>, bool shouldPaintContent, const LayoutSize& offsetFromRoot); |
| void paintBackgroundForFragments(const LayerFragments&, GraphicsContext&, GraphicsContext& transparencyLayerContext, |
| const LayoutRect& transparencyPaintDirtyRect, bool haveTransparency, const LayerPaintingInfo&, OptionSet<PaintBehavior>, RenderObject* paintingRootForRenderer); |
| void paintForegroundForFragments(const LayerFragments&, GraphicsContext&, GraphicsContext& transparencyLayerContext, |
| const LayoutRect& transparencyPaintDirtyRect, bool haveTransparency, const LayerPaintingInfo&, OptionSet<PaintBehavior>, RenderObject* paintingRootForRenderer); |
| void paintForegroundForFragmentsWithPhase(PaintPhase, const LayerFragments&, GraphicsContext&, const LayerPaintingInfo&, OptionSet<PaintBehavior>, RenderObject* paintingRootForRenderer); |
| void paintOutlineForFragments(const LayerFragments&, GraphicsContext&, const LayerPaintingInfo&, OptionSet<PaintBehavior>, RenderObject* paintingRootForRenderer); |
| void paintOverflowControlsForFragments(const LayerFragments&, GraphicsContext&, const LayerPaintingInfo&); |
| void paintMaskForFragments(const LayerFragments&, GraphicsContext&, const LayerPaintingInfo&, OptionSet<PaintBehavior>, RenderObject* paintingRootForRenderer); |
| void paintChildClippingMaskForFragments(const LayerFragments&, GraphicsContext&, const LayerPaintingInfo&, OptionSet<PaintBehavior>, RenderObject* paintingRootForRenderer); |
| void paintTransformedLayerIntoFragments(GraphicsContext&, const LayerPaintingInfo&, OptionSet<PaintLayerFlag>); |
| void collectEventRegionForFragments(const LayerFragments&, GraphicsContext&, const LayerPaintingInfo&, OptionSet<PaintBehavior>); |
| |
| RenderLayer* transparentPaintingAncestor(); |
| void beginTransparencyLayers(GraphicsContext&, const LayerPaintingInfo&, const LayoutRect& dirtyRect); |
| |
| RenderLayer* hitTestLayer(RenderLayer* rootLayer, RenderLayer* containerLayer, const HitTestRequest&, HitTestResult&, |
| const LayoutRect& hitTestRect, const HitTestLocation&, bool appliedTransform, |
| const HitTestingTransformState* = nullptr, double* zOffset = nullptr); |
| RenderLayer* hitTestLayerByApplyingTransform(RenderLayer* rootLayer, RenderLayer* containerLayer, const HitTestRequest&, HitTestResult&, |
| const LayoutRect& hitTestRect, const HitTestLocation&, const HitTestingTransformState* = nullptr, double* zOffset = nullptr, |
| const LayoutSize& translationOffset = LayoutSize()); |
| RenderLayer* hitTestList(LayerList, RenderLayer* rootLayer, const HitTestRequest&, HitTestResult&, |
| const LayoutRect& hitTestRect, const HitTestLocation&, |
| const HitTestingTransformState*, double* zOffsetForDescendants, double* zOffset, |
| const HitTestingTransformState* unflattenedTransformState, bool depthSortDescendants); |
| |
| Ref<HitTestingTransformState> createLocalTransformState(RenderLayer* rootLayer, RenderLayer* containerLayer, |
| const LayoutRect& hitTestRect, const HitTestLocation&, |
| const HitTestingTransformState* containerTransformState, |
| const LayoutSize& translationOffset = LayoutSize()) const; |
| |
| bool hitTestContents(const HitTestRequest&, HitTestResult&, const LayoutRect& layerBounds, const HitTestLocation&, HitTestFilter) const; |
| bool hitTestContentsForFragments(const LayerFragments&, const HitTestRequest&, HitTestResult&, const HitTestLocation&, HitTestFilter, bool& insideClipRect) const; |
| bool hitTestResizerInFragments(const LayerFragments&, const HitTestLocation&, LayoutPoint& pointInFragment) const; |
| RenderLayer* hitTestTransformedLayerInFragments(RenderLayer* rootLayer, RenderLayer* containerLayer, const HitTestRequest&, HitTestResult&, |
| const LayoutRect& hitTestRect, const HitTestLocation&, const HitTestingTransformState* = nullptr, double* zOffset = nullptr); |
| |
| bool listBackgroundIsKnownToBeOpaqueInRect(const LayerList&, const LayoutRect&) const; |
| |
| void computeScrollDimensions(); |
| void computeHasCompositedScrollableOverflow(); |
| |
| bool hasHorizontalOverflow() const; |
| bool hasVerticalOverflow() const; |
| |
| bool showsOverflowControls() const; |
| |
| bool shouldBeSelfPaintingLayer() const; |
| |
| // ScrollableArea interface |
| bool isRenderLayer() const final { return true; } |
| void invalidateScrollbarRect(Scrollbar&, const IntRect&) final; |
| void invalidateScrollCornerRect(const IntRect&) final; |
| bool isActive() const final; |
| bool isScrollCornerVisible() const final; |
| IntRect scrollCornerRect() const final; |
| IntRect convertFromScrollbarToContainingView(const Scrollbar&, const IntRect&) const final; |
| IntRect convertFromContainingViewToScrollbar(const Scrollbar&, const IntRect&) const final; |
| IntPoint convertFromScrollbarToContainingView(const Scrollbar&, const IntPoint&) const final; |
| IntPoint convertFromContainingViewToScrollbar(const Scrollbar&, const IntPoint&) const final; |
| void setScrollOffset(const ScrollOffset&) final; |
| ScrollingNodeID scrollingNodeID() const final; |
| |
| IntRect visibleContentRectInternal(VisibleContentRectIncludesScrollbars, VisibleContentRectBehavior) const final; |
| IntSize overhangAmount() const final; |
| IntPoint lastKnownMousePositionInView() const final; |
| bool isHandlingWheelEvent() const final; |
| bool shouldSuspendScrollAnimations() const final; |
| IntRect scrollableAreaBoundingBox(bool* isInsideFixed = nullptr) const final; |
| bool isUserScrollInProgress() const final; |
| bool isRubberBandInProgress() const final; |
| bool forceUpdateScrollbarsOnMainThreadForPerformanceTesting() const final; |
| #if ENABLE(CSS_SCROLL_SNAP) |
| bool isScrollSnapInProgress() const final; |
| #endif |
| bool usesMockScrollAnimator() const final; |
| void logMockScrollAnimatorMessage(const String&) const final; |
| |
| #if ENABLE(IOS_TOUCH_EVENTS) |
| void registerAsTouchEventListenerForScrolling(); |
| void unregisterAsTouchEventListenerForScrolling(); |
| #endif |
| |
| // NOTE: This should only be called by the overridden setScrollOffset from ScrollableArea. |
| void scrollTo(const ScrollPosition&); |
| void updateCompositingLayersAfterScroll(); |
| |
| IntSize scrollbarOffset(const Scrollbar&) const; |
| |
| void updateScrollableAreaSet(bool hasOverflow); |
| |
| bool allowsCurrentScroll() const; |
| |
| void dirtyAncestorChainVisibleDescendantStatus(); |
| void setAncestorChainHasVisibleDescendant(); |
| |
| bool has3DTransformedDescendant() const { return m_has3DTransformedDescendant; } |
| bool has3DTransformedAncestor() const { return m_has3DTransformedAncestor; } |
| |
| void dirty3DTransformedDescendantStatus(); |
| // Both updates the status, and returns true if descendants of this have 3d. |
| bool update3DTransformedDescendantStatus(); |
| |
| bool isInsideSVGForeignObject() const { return m_insideSVGForeignObject; } |
| |
| void createReflection(); |
| void removeReflection(); |
| |
| RenderStyle createReflectionStyle(); |
| bool paintingInsideReflection() const { return m_paintingInsideReflection; } |
| void setPaintingInsideReflection(bool b) { m_paintingInsideReflection = b; } |
| |
| void updateFiltersAfterStyleChange(); |
| void updateFilterPaintingStrategy(); |
| |
| #if ENABLE(CSS_COMPOSITING) |
| void updateAncestorChainHasBlendingDescendants(); |
| void dirtyAncestorChainHasBlendingDescendants(); |
| #endif |
| |
| Ref<ClipRects> parentClipRects(const ClipRectsContext&) const; |
| ClipRect backgroundClipRect(const ClipRectsContext&) const; |
| |
| RenderLayer* enclosingTransformedAncestor() const; |
| |
| LayoutRect getRectToExpose(const LayoutRect& visibleRect, const LayoutRect& exposeRect, bool insideFixed, const ScrollAlignment& alignX, const ScrollAlignment& alignY) const; |
| |
| // Convert a point in absolute coords into layer coords, taking transforms into account |
| LayoutPoint absoluteToContents(const LayoutPoint&) const; |
| |
| void positionOverflowControls(const IntSize&); |
| void updateScrollCornerStyle(); |
| void clearScrollCorner(); |
| void updateResizerStyle(); |
| void clearResizer(); |
| |
| void drawPlatformResizerImage(GraphicsContext&, const LayoutRect& resizerCornerRect); |
| |
| void updatePagination(); |
| |
| void setHasCompositingDescendant(bool b) { m_hasCompositingDescendant = b; } |
| void setHasCompositedNonContainedDescendants(bool value) { m_hasCompositedNonContainedDescendants = value; } |
| |
| void setIndirectCompositingReason(IndirectCompositingReason reason) { m_indirectCompositingReason = static_cast<unsigned>(reason); } |
| bool mustCompositeForIndirectReasons() const { return m_indirectCompositingReason; } |
| |
| LayoutUnit overflowTop() const; |
| LayoutUnit overflowBottom() const; |
| LayoutUnit overflowLeft() const; |
| LayoutUnit overflowRight() const; |
| |
| struct OverflowControlRects { |
| IntRect horizontalScrollbar; |
| IntRect verticalScrollbar; |
| IntRect scrollCorner; |
| IntRect resizer; |
| IntRect scrollCornerOrResizerRect() const |
| { |
| return !scrollCorner.isEmpty() ? scrollCorner : resizer; |
| } |
| }; |
| OverflowControlRects overflowControlsRects() const; |
| |
| bool overflowControlsIntersectRect(const IntRect& localRect) const; |
| |
| OptionSet<Compositing> m_compositingDirtyBits; |
| |
| const bool m_isRenderViewLayer : 1; |
| const bool m_forcedStackingContext : 1; |
| |
| bool m_isNormalFlowOnly : 1; |
| bool m_isCSSStackingContext : 1; |
| bool m_isOpportunisticStackingContext : 1; |
| |
| bool m_zOrderListsDirty : 1; |
| bool m_normalFlowListDirty: 1; |
| bool m_hadNegativeZOrderList : 1; |
| |
| // Keeps track of whether the layer is currently resizing, so events can cause resizing to start and stop. |
| bool m_inResizeMode : 1; |
| |
| bool m_scrollDimensionsDirty : 1; |
| bool m_isSelfPaintingLayer : 1; |
| |
| // If have no self-painting descendants, we don't have to walk our children during painting. This can lead to |
| // significant savings, especially if the tree has lots of non-self-painting layers grouped together (e.g. table cells). |
| bool m_hasSelfPaintingLayerDescendant : 1; |
| bool m_hasSelfPaintingLayerDescendantDirty : 1; |
| |
| bool m_usedTransparency : 1; // Tracks whether we need to close a transparent layer, i.e., whether |
| // we ended up painting this layer or any descendants (and therefore need to |
| // blend). |
| bool m_paintingInsideReflection : 1; // A state bit tracking if we are painting inside a replica. |
| bool m_inOverflowRelayout : 1; |
| unsigned m_repaintStatus : 2; // RepaintStatus |
| |
| bool m_visibleContentStatusDirty : 1; |
| bool m_hasVisibleContent : 1; |
| bool m_visibleDescendantStatusDirty : 1; |
| bool m_hasVisibleDescendant : 1; |
| bool m_registeredScrollableArea : 1; |
| bool m_isFixedIntersectingViewport : 1; |
| bool m_behavesAsFixed : 1; |
| |
| bool m_3DTransformedDescendantStatusDirty : 1; |
| bool m_has3DTransformedDescendant : 1; // Set on a stacking context layer that has 3D descendants anywhere |
| // in a preserves3D hierarchy. Hint to do 3D-aware hit testing. |
| bool m_hasCompositingDescendant : 1; // In the z-order tree. |
| |
| bool m_hasCompositedNonContainedDescendants : 1; |
| bool m_hasCompositedScrollingAncestor : 1; // In the layer-order tree. |
| bool m_hasCompositedScrollableOverflow : 1; |
| |
| bool m_hasTransformedAncestor : 1; |
| bool m_has3DTransformedAncestor : 1; |
| |
| bool m_insideSVGForeignObject : 1; |
| |
| unsigned m_indirectCompositingReason : 4; // IndirectCompositingReason |
| unsigned m_viewportConstrainedNotCompositedReason : 2; // ViewportConstrainedNotCompositedReason |
| |
| #if PLATFORM(IOS_FAMILY) |
| #if ENABLE(IOS_TOUCH_EVENTS) |
| bool m_registeredAsTouchEventListenerForScrolling : 1; |
| #endif |
| bool m_adjustForIOSCaretWhenScrolling : 1; |
| #endif |
| |
| bool m_requiresScrollPositionReconciliation : 1; |
| bool m_containsDirtyOverlayScrollbars : 1; |
| bool m_updatingMarqueePosition : 1; |
| |
| #if ASSERT_ENABLED |
| bool m_layerListMutationAllowed : 1; |
| #endif |
| |
| #if ENABLE(CSS_COMPOSITING) |
| unsigned m_blendMode : 5; // BlendMode |
| bool m_hasNotIsolatedCompositedBlendingDescendants : 1; |
| bool m_hasNotIsolatedBlendingDescendants : 1; |
| bool m_hasNotIsolatedBlendingDescendantsStatusDirty : 1; |
| #endif |
| |
| RenderLayerModelObject& m_renderer; |
| |
| RenderLayer* m_parent { nullptr }; |
| RenderLayer* m_previous { nullptr }; |
| RenderLayer* m_next { nullptr }; |
| RenderLayer* m_first { nullptr }; |
| RenderLayer* m_last { nullptr }; |
| |
| WeakPtr<RenderLayer> m_backingProviderLayer; |
| |
| // For layers that establish stacking contexts, m_posZOrderList holds a sorted list of all the |
| // descendant layers within the stacking context that have z-indices of 0 or greater |
| // (auto will count as 0). m_negZOrderList holds descendants within our stacking context with negative |
| // z-indices. |
| std::unique_ptr<Vector<RenderLayer*>> m_posZOrderList; |
| std::unique_ptr<Vector<RenderLayer*>> m_negZOrderList; |
| |
| // This list contains child layers that cannot create stacking contexts and appear in normal flow order. |
| std::unique_ptr<Vector<RenderLayer*>> m_normalFlowList; |
| |
| // Our current relative position offset. |
| LayoutSize m_offsetForInFlowPosition; |
| |
| // Our (x,y) coordinates are in our parent layer's coordinate space. |
| LayoutPoint m_topLeft; |
| |
| // The layer's width/height |
| IntSize m_layerSize; |
| |
| ScrollPosition m_scrollPosition; |
| Optional<ScrollPosition> m_postLayoutScrollPosition; |
| |
| // The width/height of our scrolled area. |
| IntSize m_scrollSize; |
| |
| // For layers with overflow, we have a pair of scrollbars. |
| RefPtr<Scrollbar> m_hBar; |
| RefPtr<Scrollbar> m_vBar; |
| |
| std::unique_ptr<ClipRectsCache> m_clipRectsCache; |
| |
| IntPoint m_cachedOverlayScrollbarOffset; |
| |
| Markable<ScrollingScope, IntegralMarkableTraits<ScrollingScope, 0>> m_boxScrollingScope; |
| Markable<ScrollingScope, IntegralMarkableTraits<ScrollingScope, 0>> m_contentsScrollingScope; |
| |
| std::unique_ptr<RenderMarquee> m_marquee; // Used for <marquee>. |
| |
| // Cached normal flow values for absolute positioned elements with static left/top values. |
| LayoutUnit m_staticInlinePosition; |
| LayoutUnit m_staticBlockPosition; |
| |
| std::unique_ptr<TransformationMatrix> m_transform; |
| |
| // May ultimately be extended to many replicas (with their own paint order). |
| RenderPtr<RenderReplica> m_reflection; |
| |
| // Renderers to hold our custom scroll corner and resizer. |
| RenderPtr<RenderScrollbarPart> m_scrollCorner; |
| RenderPtr<RenderScrollbarPart> m_resizer; |
| |
| // Pointer to the enclosing RenderLayer that caused us to be paginated. It is 0 if we are not paginated. |
| WeakPtr<RenderLayer> m_enclosingPaginationLayer; |
| |
| IntRect m_blockSelectionGapsBounds; |
| |
| std::unique_ptr<RenderLayerFilters> m_filters; |
| std::unique_ptr<RenderLayerBacking> m_backing; |
| |
| PaintFrequencyTracker m_paintFrequencyTracker; |
| }; |
| |
| inline void RenderLayer::clearZOrderLists() |
| { |
| ASSERT(!isStackingContext()); |
| ASSERT(layerListMutationAllowed()); |
| |
| m_posZOrderList = nullptr; |
| m_negZOrderList = nullptr; |
| } |
| |
| inline void RenderLayer::updateZOrderLists() |
| { |
| if (!m_zOrderListsDirty) |
| return; |
| |
| if (!isStackingContext()) { |
| clearZOrderLists(); |
| m_zOrderListsDirty = false; |
| return; |
| } |
| |
| rebuildZOrderLists(); |
| } |
| |
| inline RenderLayer* RenderLayer::paintOrderParent() const |
| { |
| return m_isNormalFlowOnly ? m_parent : stackingContext(); |
| } |
| |
| #if ASSERT_ENABLED |
| class LayerListMutationDetector { |
| public: |
| LayerListMutationDetector(RenderLayer& layer) |
| : m_layer(layer) |
| , m_previousMutationAllowedState(layer.layerListMutationAllowed()) |
| { |
| m_layer.setLayerListMutationAllowed(false); |
| } |
| |
| ~LayerListMutationDetector() |
| { |
| m_layer.setLayerListMutationAllowed(m_previousMutationAllowedState); |
| } |
| |
| private: |
| RenderLayer& m_layer; |
| bool m_previousMutationAllowedState; |
| }; |
| #endif // ASSERT_ENABLED |
| |
| void makeMatrixRenderable(TransformationMatrix&, bool has3DRendering); |
| |
| bool compositedWithOwnBackingStore(const RenderLayer&); |
| |
| WTF::TextStream& operator<<(WTF::TextStream&, ClipRectsType); |
| WTF::TextStream& operator<<(WTF::TextStream&, const RenderLayer&); |
| WTF::TextStream& operator<<(WTF::TextStream&, const RenderLayer::ClipRectsContext&); |
| WTF::TextStream& operator<<(WTF::TextStream&, IndirectCompositingReason); |
| WTF::TextStream& operator<<(WTF::TextStream&, PaintBehavior); |
| |
| } // namespace WebCore |
| |
| #if ENABLE(TREE_DEBUGGING) |
| // Outside the WebCore namespace for ease of invocation from lldb. |
| void showLayerTree(const WebCore::RenderLayer*); |
| void showPaintOrderTree(const WebCore::RenderLayer*); |
| void showLayerTree(const WebCore::RenderObject*); |
| #endif |
| |
| SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::RenderLayer) |
| static bool isType(const WebCore::ScrollableArea& area) { return area.isRenderLayer(); } |
| SPECIALIZE_TYPE_TRAITS_END() |
