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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2003, 2006, 2007, 2009 Apple Inc. All rights reserved.
* Copyright (C) 2010, 2012 Google Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#pragma once
#include "RenderElement.h"
namespace WebCore {
class KeyframeList;
class RenderLayer;
class SVGGraphicsElement;
struct LayerRepaintRects {
LayoutRect clippedOverflowRect;
LayoutRect outlineBoundsRect;
};
class RenderLayerModelObject : public RenderElement {
WTF_MAKE_ISO_ALLOCATED(RenderLayerModelObject);
public:
virtual ~RenderLayerModelObject();
void destroyLayer();
bool hasSelfPaintingLayer() const;
RenderLayer* layer() const { return m_layer.get(); }
void styleWillChange(StyleDifference, const RenderStyle& newStyle) override;
void styleDidChange(StyleDifference, const RenderStyle* oldStyle) override;
virtual void updateFromStyle() { }
virtual bool requiresLayer() const = 0;
// Returns true if the background is painted opaque in the given rect.
// The query rect is given in local coordinate system.
virtual bool backgroundIsKnownToBeOpaqueInRect(const LayoutRect&) const { return false; }
// Returns false if the rect has no intersection with the applied clip rect. When the context specifies edge-inclusive
// intersection, this return value allows distinguishing between no intersection and zero-area intersection.
virtual bool applyCachedClipAndScrollPosition(LayoutRect&, const RenderLayerModelObject*, VisibleRectContext) const { return false; }
virtual bool isScrollableOrRubberbandableBox() const { return false; }
bool shouldPlaceVerticalScrollbarOnLeft() const;
std::optional<LayerRepaintRects> layerRepaintRects() const;
bool startAnimation(double timeOffset, const Animation&, const KeyframeList&) override;
void animationPaused(double timeOffset, const String& name) override;
void animationFinished(const String& name) override;
void transformRelatedPropertyDidChange() override;
void suspendAnimations(MonotonicTime = MonotonicTime()) override;
#if ENABLE(LAYER_BASED_SVG_ENGINE)
// Provides the SVG implementation for computeVisibleRectInContainer().
// This lives in RenderLayerModelObject, which is the common base-class for all SVG renderers.
std::optional<LayoutRect> computeVisibleRectInSVGContainer(const LayoutRect&, const RenderLayerModelObject* container, VisibleRectContext) const;
// Provides the SVG implementation for mapLocalToContainer().
// This lives in RenderLayerModelObject, which is the common base-class for all SVG renderers.
void mapLocalToSVGContainer(const RenderLayerModelObject* ancestorContainer, TransformState&, OptionSet<MapCoordinatesMode>, bool* wasFixed) const;
void applySVGTransform(TransformationMatrix&, SVGGraphicsElement&, const RenderStyle&, const FloatRect& boundingBox, const std::optional<AffineTransform>& preApplySVGTransformMatrix, const std::optional<AffineTransform>& postApplySVGTransformMatrix, OptionSet<RenderStyle::TransformOperationOption>) const;
void updateHasSVGTransformFlags(const SVGGraphicsElement&);
LayoutPoint nominalSVGLayoutLocation() const { return flooredLayoutPoint(objectBoundingBoxWithoutTransformations().minXMinYCorner()); }
virtual LayoutPoint currentSVGLayoutLocation() const { ASSERT_NOT_REACHED(); return { }; }
virtual void setCurrentSVGLayoutLocation(const LayoutPoint&) { ASSERT_NOT_REACHED(); }
#endif
TransformationMatrix* layerTransform() const;
virtual void updateLayerTransform();
virtual void applyTransform(TransformationMatrix&, const RenderStyle&, const FloatRect& boundingBox, OptionSet<RenderStyle::TransformOperationOption> = RenderStyle::allTransformOperations) const = 0;
protected:
RenderLayerModelObject(Element&, RenderStyle&&, BaseTypeFlags);
RenderLayerModelObject(Document&, RenderStyle&&, BaseTypeFlags);
void createLayer();
void willBeDestroyed() override;
void willBeRemovedFromTree(IsInternalMove) override;
private:
std::unique_ptr<RenderLayer> m_layer;
// Used to store state between styleWillChange and styleDidChange
static bool s_wasFloating;
static bool s_hadLayer;
static bool s_hadTransform;
static bool s_layerWasSelfPainting;
};
// Pixel-snapping (== 'device pixel alignment') helpers.
bool rendererNeedsPixelSnapping(const RenderLayerModelObject&);
FloatRect snapRectToDevicePixelsIfNeeded(const LayoutRect&, const RenderLayerModelObject&);
FloatRect snapRectToDevicePixelsIfNeeded(const FloatRect&, const RenderLayerModelObject&);
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderLayerModelObject, isRenderLayerModelObject())
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