/* * Copyright (C) 2003, 2009 Apple Inc. All rights reserved. * * Portions are Copyright (C) 1998 Netscape Communications Corporation. * * Other contributors: * Robert O'Callahan * David Baron * Christian Biesinger * Randall Jesup * Roland Mainz * Josh Soref * Boris Zbarsky * * 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. */ #ifndef RenderLayer_h #define RenderLayer_h #include "PaintInfo.h" #include "RenderBox.h" #include "ScrollBehavior.h" #include "ScrollableArea.h" #include namespace WebCore { class HitTestRequest; class HitTestResult; class HitTestingTransformState; class RenderMarquee; class RenderReplica; class RenderScrollbarPart; class RenderStyle; class RenderView; class Scrollbar; class TransformationMatrix; #if USE(ACCELERATED_COMPOSITING) class RenderLayerBacking; class RenderLayerCompositor; #endif class ClipRects { public: ClipRects() : m_refCnt(0) , m_fixed(false) { } ClipRects(const IntRect& r) : m_overflowClipRect(r) , m_fixedClipRect(r) , m_posClipRect(r) , m_refCnt(0) , m_fixed(false) { } ClipRects(const ClipRects& other) : m_overflowClipRect(other.overflowClipRect()) , m_fixedClipRect(other.fixedClipRect()) , m_posClipRect(other.posClipRect()) , m_refCnt(0) , m_fixed(other.fixed()) { } void reset(const IntRect& r) { m_overflowClipRect = r; m_fixedClipRect = r; m_posClipRect = r; m_fixed = false; } const IntRect& overflowClipRect() const { return m_overflowClipRect; } void setOverflowClipRect(const IntRect& r) { m_overflowClipRect = r; } const IntRect& fixedClipRect() const { return m_fixedClipRect; } void setFixedClipRect(const IntRect&r) { m_fixedClipRect = r; } const IntRect& posClipRect() const { return m_posClipRect; } void setPosClipRect(const IntRect& r) { m_posClipRect = r; } bool fixed() const { return m_fixed; } void setFixed(bool fixed) { m_fixed = fixed; } void ref() { m_refCnt++; } void deref(RenderArena* renderArena) { if (--m_refCnt == 0) destroy(renderArena); } void destroy(RenderArena*); // Overloaded new operator. void* operator new(size_t, RenderArena*) throw(); // Overridden to prevent the normal delete from being called. void operator delete(void*, size_t); bool operator==(const ClipRects& other) const { return m_overflowClipRect == other.overflowClipRect() && m_fixedClipRect == other.fixedClipRect() && m_posClipRect == other.posClipRect() && m_fixed == other.fixed(); } ClipRects& operator=(const ClipRects& other) { m_overflowClipRect = other.overflowClipRect(); m_fixedClipRect = other.fixedClipRect(); m_posClipRect = other.posClipRect(); m_fixed = other.fixed(); return *this; } private: // The normal operator new is disallowed on all render objects. void* operator new(size_t) throw(); private: IntRect m_overflowClipRect; IntRect m_fixedClipRect; IntRect m_posClipRect; unsigned m_refCnt : 31; bool m_fixed : 1; }; class RenderLayer : public ScrollableArea { public: friend class RenderReplica; RenderLayer(RenderBoxModelObject*); ~RenderLayer(); RenderBoxModelObject* renderer() const { return m_renderer; } RenderBox* renderBox() const { return m_renderer && m_renderer->isBox() ? toRenderBox(m_renderer) : 0; } 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; } void addChild(RenderLayer* newChild, RenderLayer* beforeChild = 0); RenderLayer* removeChild(RenderLayer*); void removeOnlyThisLayer(); void insertOnlyThisLayer(); void repaintIncludingDescendants(); #if USE(ACCELERATED_COMPOSITING) // Indicate that the layer contents need to be repainted. Only has an effect // if layer compositing is being used, void setBackingNeedsRepaint(); void setBackingNeedsRepaintInRect(const IntRect& r); // r is in the coordinate space of the layer's render object void repaintIncludingNonCompositingDescendants(RenderBoxModelObject* repaintContainer); #endif void styleChanged(StyleDifference, const RenderStyle* oldStyle); RenderMarquee* marquee() const { return m_marquee; } bool isNormalFlowOnly() const { return m_isNormalFlowOnly; } bool isSelfPaintingLayer() const; bool requiresSlowRepaints() const; bool isTransparent() const; RenderLayer* transparentPaintingAncestor(); void beginTransparencyLayers(GraphicsContext*, const RenderLayer* rootLayer, PaintBehavior); bool hasReflection() const { return renderer()->hasReflection(); } bool isReflection() const { return renderer()->isReplica(); } RenderReplica* reflection() const { return m_reflection; } RenderLayer* reflectionLayer() const; const RenderLayer* root() const { const RenderLayer* curr = this; while (curr->parent()) curr = curr->parent(); return curr; } int x() const { return m_x; } int y() const { return m_y; } void setLocation(int x, int y) { m_x = x; m_y = y; } int width() const { return m_width; } int height() const { return m_height; } IntSize size() const { return IntSize(m_width, m_height); } #if PLATFORM(ANDROID) void setWidth(int w); void setHeight(int h); #else void setWidth(int w) { m_width = w; } void setHeight(int h) { m_height = h; } #endif int scrollWidth(); int scrollHeight(); void panScrollFromPoint(const IntPoint&); // Scrolling methods for layers that can scroll their overflow. void scrollByRecursively(int xDelta, int yDelta); IntSize scrolledContentOffset() const { return IntSize(scrollXOffset() + m_scrollLeftOverflow, scrollYOffset() + m_scrollTopOverflow); } int scrollXOffset() const { return m_scrollX + m_scrollOrigin.x(); } int scrollYOffset() const { return m_scrollY + m_scrollOrigin.y(); } void scrollToOffset(int x, int y); void scrollToXOffset(int x) { scrollToOffset(x, m_scrollY + m_scrollOrigin.y()); } void scrollToYOffset(int y) { scrollToOffset(m_scrollX + m_scrollOrigin.x(), y); } void scrollRectToVisible(const IntRect&, bool scrollToAnchor = false, const ScrollAlignment& alignX = ScrollAlignment::alignCenterIfNeeded, const ScrollAlignment& alignY = ScrollAlignment::alignCenterIfNeeded); IntRect getRectToExpose(const IntRect& visibleRect, const IntRect& exposeRect, const ScrollAlignment& alignX, const ScrollAlignment& alignY); void setHasHorizontalScrollbar(bool); void setHasVerticalScrollbar(bool); PassRefPtr createScrollbar(ScrollbarOrientation); void destroyScrollbar(ScrollbarOrientation); // ScrollableArea overrides virtual Scrollbar* horizontalScrollbar() const { return m_hBar.get(); } virtual Scrollbar* verticalScrollbar() const { return m_vBar.get(); } int verticalScrollbarWidth(OverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize) const; int horizontalScrollbarHeight(OverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize) const; bool hasOverflowControls() const; bool isPointInResizeControl(const IntPoint& absolutePoint) const; bool hitTestOverflowControls(HitTestResult&, const IntPoint& localPoint); IntSize offsetFromResizeCorner(const IntPoint& absolutePoint) const; void paintOverflowControls(GraphicsContext*, int tx, int ty, const IntRect& damageRect, bool paintingOverlayControls = false); void paintScrollCorner(GraphicsContext*, int tx, int ty, const IntRect& damageRect); void paintResizer(GraphicsContext*, int tx, int ty, const IntRect& damageRect); void updateScrollInfoAfterLayout(); bool scroll(ScrollDirection, ScrollGranularity, float multiplier = 1); void autoscroll(); void resize(const PlatformMouseEvent&, const IntSize&); bool inResizeMode() const { return m_inResizeMode; } void setInResizeMode(bool b) { m_inResizeMode = b; } bool isRootLayer() const { return renderer()->isRenderView(); } #if USE(ACCELERATED_COMPOSITING) 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. enum ContentChangeType { ImageChanged, MaskImageChanged, CanvasChanged, VideoChanged, FullScreenChanged }; void contentChanged(ContentChangeType); #endif // Returns true if the accelerated compositing is enabled bool hasAcceleratedCompositing() const; bool canRender3DTransforms() const; void updateLayerPosition(); enum UpdateLayerPositionsFlag { CheckForRepaint = 1, IsCompositingUpdateRoot = 1 << 1, UpdateCompositingLayers = 1 << 2, UpdatePagination = 1 << 3 }; typedef unsigned UpdateLayerPositionsFlags; void updateLayerPositions(UpdateLayerPositionsFlags = CheckForRepaint | IsCompositingUpdateRoot | UpdateCompositingLayers, IntPoint* cachedOffset = 0); void updateTransform(); void relativePositionOffset(int& relX, int& relY) const { relX += m_relX; relY += m_relY; } IntSize relativePositionOffset() const { return IntSize(m_relX, m_relY); } void clearClipRectsIncludingDescendants(); void clearClipRects(); void addBlockSelectionGapsBounds(const IntRect&); void clearBlockSelectionGapsBounds(); void repaintBlockSelectionGaps(); // Get the enclosing stacking context for this layer. A stacking context is a layer // that has a non-auto z-index. RenderLayer* stackingContext() const; #if ENABLE(COMPOSITED_FIXED_ELEMENTS) bool isFixed() const { return renderer()->isPositioned() && renderer()->style()->position() == FixedPosition; } // If fixed elements are composited, they will be containing children bool isStackingContext() const { #if ENABLE(ANDROID_OVERFLOW_SCROLL) if (hasOverflowScroll()) return true; #endif return !hasAutoZIndex() || renderer()->isRenderView() || (isComposited() && isFixed()); } #else #if ENABLE(ANDROID_OVERFLOW_SCROLL) bool isStackingContext() const { return !hasAutoZIndex() || renderer()->isRenderView() || hasOverflowScroll(); } #else bool isStackingContext() const { return !hasAutoZIndex() || renderer()->isRenderView() ; } #endif #endif void dirtyZOrderLists(); void dirtyStackingContextZOrderLists(); void updateZOrderLists(); Vector* posZOrderList() const { return m_posZOrderList; } Vector* negZOrderList() const { return m_negZOrderList; } void dirtyNormalFlowList(); void updateNormalFlowList(); Vector* normalFlowList() const { return m_normalFlowList; } bool hasVisibleContent() const { return m_hasVisibleContent; } bool hasVisibleDescendant() const { return m_hasVisibleDescendant; } void setHasVisibleContent(bool); void dirtyVisibleContentStatus(); // Gets the nearest enclosing positioned ancestor layer (also includes // the layer and the root layer). RenderLayer* enclosingPositionedAncestor() const; // The layer relative to which clipping rects for this layer are computed. RenderLayer* clippingRoot() const; #if USE(ACCELERATED_COMPOSITING) // Enclosing compositing layer; if includeSelf is true, may return this. RenderLayer* enclosingCompositingLayer(bool includeSelf = true) const; // Ancestor compositing layer, excluding this. RenderLayer* ancestorCompositingLayer() const { return enclosingCompositingLayer(false); } #endif void convertToLayerCoords(const RenderLayer* ancestorLayer, int& x, int& y) const; bool hasAutoZIndex() const { return renderer()->style()->hasAutoZIndex(); } int zIndex() const { return renderer()->style()->zIndex(); } // 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 IntRect& damageRect, PaintBehavior = PaintBehaviorNormal, RenderObject* paintingRoot = 0); bool hitTest(const HitTestRequest&, HitTestResult&); void paintOverlayScrollbars(GraphicsContext*, const IntRect& damageRect, PaintBehavior, RenderObject* paintingRoot); // This method figures out our layerBounds in coordinates relative to // |rootLayer}. It also computes our background and foreground clip rects // for painting/event handling. void calculateRects(const RenderLayer* rootLayer, const IntRect& paintDirtyRect, IntRect& layerBounds, IntRect& backgroundRect, IntRect& foregroundRect, IntRect& outlineRect, bool temporaryClipRects = false, OverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize) const; // Compute and cache clip rects computed with the given layer as the root void updateClipRects(const RenderLayer* rootLayer, OverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize); // 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 RenderLayer* rootLayer, ClipRects&, bool useCached = false, OverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize) const; ClipRects* clipRects() const { return m_clipRects; } IntRect childrenClipRect() const; // Returns the foreground clip rect of the layer in the document's coordinate space. IntRect selfClipRect() const; // Returns the background clip rect of the layer in the document's coordinate space. bool intersectsDamageRect(const IntRect& layerBounds, const IntRect& damageRect, const RenderLayer* rootLayer) const; // Bounding box relative to some ancestor layer. IntRect boundingBox(const RenderLayer* rootLayer) const; // Bounding box in the coordinates of this layer. IntRect localBoundingBox() const; // Bounding box relative to the root. IntRect absoluteBoundingBox() const; void updateHoverActiveState(const HitTestRequest&, HitTestResult&); // Return a cached repaint rect, computed relative to the layer renderer's containerForRepaint. IntRect repaintRect() const { return m_repaintRect; } IntRect repaintRectIncludingDescendants() const; void computeRepaintRects(); void updateRepaintRectsAfterScroll(bool fixed = false); void setNeedsFullRepaint(bool f = true) { m_needsFullRepaint = f; } int staticInlinePosition() const { return m_staticInlinePosition; } int staticBlockPosition() const { return m_staticBlockPosition; } void setStaticInlinePosition(int position) { m_staticInlinePosition = position; } void setStaticBlockPosition(int position) { m_staticBlockPosition = position; } 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() const; TransformationMatrix renderableTransform(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; FloatPoint perspectiveOrigin() const; bool preserves3D() const { return renderer()->style()->transformStyle3D() == TransformStyle3DPreserve3D; } bool has3DTransform() const { return m_transform && !m_transform->isAffine(); } // Overloaded new operator. Derived classes must override operator new // in order to allocate out of the RenderArena. void* operator new(size_t, RenderArena*) throw(); // Overridden to prevent the normal delete from being called. void operator delete(void*, size_t); #if USE(ACCELERATED_COMPOSITING) bool isComposited() const { return m_backing != 0; } bool hasCompositedMask() const; RenderLayerBacking* backing() const { return m_backing.get(); } RenderLayerBacking* ensureBacking(); void clearBacking(); virtual GraphicsLayer* layerForHorizontalScrollbar() const; virtual GraphicsLayer* layerForVerticalScrollbar() const; virtual GraphicsLayer* layerForScrollCorner() const; #else bool isComposited() const { return false; } bool hasCompositedMask() const { return false; } #endif bool paintsWithTransparency(PaintBehavior paintBehavior) const { return isTransparent() && ((paintBehavior & PaintBehaviorFlattenCompositingLayers) || !isComposited()); } bool paintsWithTransform(PaintBehavior) const; bool containsDirtyOverlayScrollbars() const { return m_containsDirtyOverlayScrollbars; } void setContainsDirtyOverlayScrollbars(bool dirtyScrollbars) { m_containsDirtyOverlayScrollbars = dirtyScrollbars; } #if ENABLE(ANDROID_OVERFLOW_SCROLL) bool hasOverflowScroll() const { return m_hasOverflowScroll; } bool hasOverflowParent() const; #endif #if PLATFORM(ANDROID) bool intrinsicallyComposited() const { return m_intrinsicallyComposited; } void setIntrinsicallyComposited(bool intrinsicallyComposited) { m_intrinsicallyComposited = intrinsicallyComposited; } #endif private: // The normal operator new is disallowed on all render objects. void* operator new(size_t) throw(); void setNextSibling(RenderLayer* next) { m_next = next; } void setPreviousSibling(RenderLayer* prev) { m_previous = prev; } void setParent(RenderLayer* parent); void setFirstChild(RenderLayer* first) { m_first = first; } void setLastChild(RenderLayer* last) { m_last = last; } int renderBoxX() const { return renderer()->isBox() ? toRenderBox(renderer())->x() : 0; } int renderBoxY() const { return renderer()->isBox() ? toRenderBox(renderer())->y() : 0; } void collectLayers(Vector*&, Vector*&); void updateLayerListsIfNeeded(); void updateCompositingAndLayerListsIfNeeded(); enum PaintLayerFlag { PaintLayerHaveTransparency = 1, PaintLayerAppliedTransform = 1 << 1, PaintLayerTemporaryClipRects = 1 << 2, PaintLayerPaintingReflection = 1 << 3, PaintLayerPaintingOverlayScrollbars = 1 << 4 }; typedef unsigned PaintLayerFlags; void paintLayer(RenderLayer* rootLayer, GraphicsContext*, const IntRect& paintDirtyRect, PaintBehavior, RenderObject* paintingRoot, OverlapTestRequestMap* = 0, PaintLayerFlags = 0); void paintList(Vector*, RenderLayer* rootLayer, GraphicsContext* p, const IntRect& paintDirtyRect, PaintBehavior, RenderObject* paintingRoot, OverlapTestRequestMap*, PaintLayerFlags); void paintPaginatedChildLayer(RenderLayer* childLayer, RenderLayer* rootLayer, GraphicsContext*, const IntRect& paintDirtyRect, PaintBehavior, RenderObject* paintingRoot, OverlapTestRequestMap*, PaintLayerFlags); void paintChildLayerIntoColumns(RenderLayer* childLayer, RenderLayer* rootLayer, GraphicsContext*, const IntRect& paintDirtyRect, PaintBehavior, RenderObject* paintingRoot, OverlapTestRequestMap*, PaintLayerFlags, const Vector& columnLayers, size_t columnIndex); RenderLayer* hitTestLayer(RenderLayer* rootLayer, RenderLayer* containerLayer, const HitTestRequest& request, HitTestResult& result, const IntRect& hitTestRect, const IntPoint& hitTestPoint, bool appliedTransform, const HitTestingTransformState* transformState = 0, double* zOffset = 0); RenderLayer* hitTestList(Vector*, RenderLayer* rootLayer, const HitTestRequest& request, HitTestResult& result, const IntRect& hitTestRect, const IntPoint& hitTestPoint, const HitTestingTransformState* transformState, double* zOffsetForDescendants, double* zOffset, const HitTestingTransformState* unflattenedTransformState, bool depthSortDescendants); RenderLayer* hitTestPaginatedChildLayer(RenderLayer* childLayer, RenderLayer* rootLayer, const HitTestRequest& request, HitTestResult& result, const IntRect& hitTestRect, const IntPoint& hitTestPoint, const HitTestingTransformState* transformState, double* zOffset); RenderLayer* hitTestChildLayerColumns(RenderLayer* childLayer, RenderLayer* rootLayer, const HitTestRequest& request, HitTestResult& result, const IntRect& hitTestRect, const IntPoint& hitTestPoint, const HitTestingTransformState* transformState, double* zOffset, const Vector& columnLayers, size_t columnIndex); PassRefPtr createLocalTransformState(RenderLayer* rootLayer, RenderLayer* containerLayer, const IntRect& hitTestRect, const IntPoint& hitTestPoint, const HitTestingTransformState* containerTransformState) const; bool hitTestContents(const HitTestRequest&, HitTestResult&, const IntRect& layerBounds, const IntPoint& hitTestPoint, HitTestFilter) const; void computeScrollDimensions(bool* needHBar = 0, bool* needVBar = 0); bool shouldBeNormalFlowOnly() const; // ScrollableArea interface virtual int scrollSize(ScrollbarOrientation orientation) const; virtual void setScrollOffset(const IntPoint&); virtual int scrollPosition(Scrollbar*) const; virtual void invalidateScrollbarRect(Scrollbar*, const IntRect&); virtual void invalidateScrollCornerRect(const IntRect&); virtual bool isActive() const; virtual bool isScrollCornerVisible() const; virtual IntRect scrollCornerRect() const; virtual IntRect convertFromScrollbarToContainingView(const Scrollbar*, const IntRect&) const; virtual IntRect convertFromContainingViewToScrollbar(const Scrollbar*, const IntRect&) const; virtual IntPoint convertFromScrollbarToContainingView(const Scrollbar*, const IntPoint&) const; virtual IntPoint convertFromContainingViewToScrollbar(const Scrollbar*, const IntPoint&) const; virtual IntSize contentsSize() const; virtual int visibleHeight() const; virtual int visibleWidth() const; virtual IntPoint currentMousePosition() const; virtual bool shouldSuspendScrollAnimations() const; // Rectangle encompassing the scroll corner and resizer rect. IntRect scrollCornerAndResizerRect() const; virtual void disconnectFromPage() { m_page = 0; } // NOTE: This should only be called by the overriden setScrollOffset from ScrollableArea. void scrollTo(int x, int y); IntSize scrollbarOffset(const Scrollbar*) const; void updateOverflowStatus(bool horizontalOverflow, bool verticalOverflow); void childVisibilityChanged(bool newVisibility); void dirtyVisibleDescendantStatus(); void updateVisibilityStatus(); // This flag is computed by RenderLayerCompositor, which knows more about 3d hierarchies than we do. void setHas3DTransformedDescendant(bool b) { m_has3DTransformedDescendant = b; } bool has3DTransformedDescendant() const { return m_has3DTransformedDescendant; } void dirty3DTransformedDescendantStatus(); // Both updates the status, and returns true if descendants of this have 3d. bool update3DTransformedDescendantStatus(); Node* enclosingElement() const; void createReflection(); void removeReflection(); void updateReflectionStyle(); bool paintingInsideReflection() const { return m_paintingInsideReflection; } void setPaintingInsideReflection(bool b) { m_paintingInsideReflection = b; } void parentClipRects(const RenderLayer* rootLayer, ClipRects&, bool temporaryClipRects = false, OverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize) const; IntRect backgroundClipRect(const RenderLayer* rootLayer, bool temporaryClipRects, OverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize) const; RenderLayer* enclosingTransformedAncestor() const; // Convert a point in absolute coords into layer coords, taking transforms into account IntPoint absoluteToContents(const IntPoint&) const; void positionOverflowControls(int tx, int ty); void updateScrollCornerStyle(); void updateResizerStyle(); void updatePagination(); bool isPaginated() const { return m_isPaginated; } #if USE(ACCELERATED_COMPOSITING) bool hasCompositingDescendant() const { return m_hasCompositingDescendant; } void setHasCompositingDescendant(bool b) { m_hasCompositingDescendant = b; } bool mustOverlapCompositedLayers() const { return m_mustOverlapCompositedLayers; } void setMustOverlapCompositedLayers(bool b) { m_mustOverlapCompositedLayers = b; } #if ENABLE(COMPOSITED_FIXED_ELEMENTS) bool shouldComposite() { return m_shouldComposite; } void setShouldComposite(bool b) { m_shouldComposite = b; } #endif #endif void updateContentsScale(float); friend class RenderLayerBacking; friend class RenderLayerCompositor; friend class RenderBoxModelObject; // Only safe to call from RenderBoxModelObject::destroyLayer(RenderArena*) void destroy(RenderArena*); int overflowTop() const; int overflowBottom() const; int overflowLeft() const; int overflowRight() const; protected: RenderBoxModelObject* m_renderer; RenderLayer* m_parent; RenderLayer* m_previous; RenderLayer* m_next; RenderLayer* m_first; RenderLayer* m_last; IntRect m_repaintRect; // Cached repaint rects. Used by layout. IntRect m_outlineBox; // Our current relative position offset. int m_relX; int m_relY; // Our (x,y) coordinates are in our parent layer's coordinate space. int m_x; int m_y; // The layer's width/height int m_width; int m_height; // Our scroll offsets if the view is scrolled. int m_scrollX; int m_scrollY; int m_scrollLeftOverflow; int m_scrollTopOverflow; // The width/height of our scrolled area. int m_scrollWidth; int m_scrollHeight; // For layers with overflow, we have a pair of scrollbars. RefPtr m_hBar; RefPtr m_vBar; // Keeps track of whether the layer is currently resizing, so events can cause resizing to start and stop. bool m_inResizeMode; // 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. Vector* m_posZOrderList; Vector* m_negZOrderList; // This list contains child layers that cannot create stacking contexts. For now it is just // overflow layers, but that may change in the future. Vector* m_normalFlowList; ClipRects* m_clipRects; // Cached clip rects used when painting and hit testing. #ifndef NDEBUG const RenderLayer* m_clipRectsRoot; // Root layer used to compute clip rects. #endif bool m_scrollDimensionsDirty : 1; bool m_zOrderListsDirty : 1; bool m_normalFlowListDirty: 1; bool m_isNormalFlowOnly : 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; bool m_needsFullRepaint : 1; bool m_overflowStatusDirty : 1; bool m_horizontalOverflow : 1; bool m_verticalOverflow : 1; bool m_visibleContentStatusDirty : 1; bool m_hasVisibleContent : 1; bool m_visibleDescendantStatusDirty : 1; bool m_hasVisibleDescendant : 1; bool m_isPaginated : 1; // If we think this layer is split by a multi-column ancestor, then this bit will be set. 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. #if USE(ACCELERATED_COMPOSITING) bool m_hasCompositingDescendant : 1; // In the z-order tree. bool m_mustOverlapCompositedLayers : 1; #if ENABLE(COMPOSITED_FIXED_ELEMENTS) bool m_shouldComposite : 1; #endif #endif #if PLATFORM(ANDROID) bool m_intrinsicallyComposited : 1; #endif bool m_containsDirtyOverlayScrollbars : 1; #if ENABLE(ANDROID_OVERFLOW_SCROLL) bool m_hasOverflowScroll : 1; #endif IntPoint m_cachedOverlayScrollbarOffset; RenderMarquee* m_marquee; // Used by layers with overflow:marquee // Cached normal flow values for absolute positioned elements with static left/top values. int m_staticInlinePosition; int m_staticBlockPosition; OwnPtr m_transform; // May ultimately be extended to many replicas (with their own paint order). RenderReplica* m_reflection; // Renderers to hold our custom scroll corner and resizer. RenderScrollbarPart* m_scrollCorner; RenderScrollbarPart* m_resizer; private: IntRect m_blockSelectionGapsBounds; #if USE(ACCELERATED_COMPOSITING) OwnPtr m_backing; #endif Page* m_page; }; } // namespace WebCore #ifndef NDEBUG // Outside the WebCore namespace for ease of invocation from gdb. void showLayerTree(const WebCore::RenderLayer*); void showLayerTree(const WebCore::RenderObject*); #endif #endif // RenderLayer_h