335 lines
18 KiB
C++
335 lines
18 KiB
C++
/*
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
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* (C) 1999 Antti Koivisto (koivisto@kde.org)
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* Copyright (C) 2003, 2006, 2007, 2009 Apple Inc. All rights reserved.
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* Copyright (C) 2010 Google Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#pragma once
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#include "FontBaseline.h"
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#include "LayoutRect.h"
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#include "RectEdges.h"
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#include "RenderLayerModelObject.h"
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namespace WebCore {
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// Modes for some of the line-related functions.
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enum LinePositionMode { PositionOnContainingLine, PositionOfInteriorLineBoxes };
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enum LineDirectionMode { HorizontalLine, VerticalLine };
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enum BackgroundBleedAvoidance {
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BackgroundBleedNone,
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BackgroundBleedShrinkBackground,
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BackgroundBleedUseTransparencyLayer,
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BackgroundBleedBackgroundOverBorder
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};
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enum BaseBackgroundColorUsage {
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BaseBackgroundColorUse,
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BaseBackgroundColorOnly,
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BaseBackgroundColorSkip
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};
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enum ContentChangeType {
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ImageChanged,
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MaskImageChanged,
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BackgroundImageChanged,
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CanvasChanged,
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CanvasPixelsChanged,
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VideoChanged,
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FullScreenChanged,
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ModelChanged
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};
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class BorderEdge;
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class ImageBuffer;
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class LegacyInlineFlowBox;
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class RenderTextFragment;
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class StickyPositionViewportConstraints;
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enum class BoxSideFlag : uint8_t;
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using BoxSideSet = OptionSet<BoxSideFlag>;
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using BorderEdges = RectEdges<BorderEdge>;
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class BackgroundImageGeometry {
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public:
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BackgroundImageGeometry(const LayoutRect& destinationRect, const LayoutSize& tile, const LayoutSize& phase, const LayoutSize& space, bool fixedAttachment)
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: m_destRect(destinationRect)
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, m_destOrigin(m_destRect.location())
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, m_tileSize(tile)
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, m_phase(phase)
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, m_space(space)
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, m_hasNonLocalGeometry(fixedAttachment)
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{
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}
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LayoutRect destRect() const { return m_destRect; }
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LayoutSize phase() const { return m_phase; }
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LayoutSize tileSize() const { return m_tileSize; }
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LayoutSize spaceSize() const { return m_space; }
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bool hasNonLocalGeometry() const { return m_hasNonLocalGeometry; }
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LayoutSize relativePhase() const
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{
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LayoutSize phase = m_phase;
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phase += m_destRect.location() - m_destOrigin;
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return phase;
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}
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void clip(const LayoutRect& clipRect) { m_destRect.intersect(clipRect); }
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private:
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LayoutRect m_destRect;
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LayoutPoint m_destOrigin;
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LayoutSize m_tileSize;
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LayoutSize m_phase;
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LayoutSize m_space;
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bool m_hasNonLocalGeometry; // Has background-attachment: fixed. Implies that we can't always cheaply compute destRect.
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};
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// This class is the base for all objects that adhere to the CSS box model as described
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// at http://www.w3.org/TR/CSS21/box.html
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class RenderBoxModelObject : public RenderLayerModelObject {
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WTF_MAKE_ISO_ALLOCATED(RenderBoxModelObject);
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public:
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virtual ~RenderBoxModelObject();
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LayoutSize relativePositionOffset() const;
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LayoutSize relativePositionLogicalOffset() const { return style().isHorizontalWritingMode() ? relativePositionOffset() : relativePositionOffset().transposedSize(); }
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FloatRect constrainingRectForStickyPosition() const;
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std::pair<const RenderBox&, const RenderLayer*> enclosingClippingBoxForStickyPosition() const;
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void computeStickyPositionConstraints(StickyPositionViewportConstraints&, const FloatRect& constrainingRect) const;
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LayoutSize stickyPositionOffset() const;
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LayoutSize stickyPositionLogicalOffset() const { return style().isHorizontalWritingMode() ? stickyPositionOffset() : stickyPositionOffset().transposedSize(); }
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LayoutSize offsetForInFlowPosition() const;
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// IE extensions. Used to calculate offsetWidth/Height. Overridden by inlines (RenderFlow)
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// to return the remaining width on a given line (and the height of a single line).
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virtual LayoutUnit offsetLeft() const;
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virtual LayoutUnit offsetTop() const;
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virtual LayoutUnit offsetWidth() const = 0;
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virtual LayoutUnit offsetHeight() const = 0;
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void updateFromStyle() override;
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bool requiresLayer() const override { return isDocumentElementRenderer() || isPositioned() || createsGroup() || hasTransformRelatedProperty() || hasHiddenBackface() || hasReflection(); }
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// This will work on inlines to return the bounding box of all of the lines' border boxes.
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virtual LayoutRect borderBoundingBox() const = 0;
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// These return the CSS computed padding values.
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LayoutUnit computedCSSPaddingTop() const { return computedCSSPadding(style().paddingTop()); }
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LayoutUnit computedCSSPaddingBottom() const { return computedCSSPadding(style().paddingBottom()); }
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LayoutUnit computedCSSPaddingLeft() const { return computedCSSPadding(style().paddingLeft()); }
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LayoutUnit computedCSSPaddingRight() const { return computedCSSPadding(style().paddingRight()); }
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LayoutUnit computedCSSPaddingBefore() const { return computedCSSPadding(style().paddingBefore()); }
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LayoutUnit computedCSSPaddingAfter() const { return computedCSSPadding(style().paddingAfter()); }
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LayoutUnit computedCSSPaddingStart() const { return computedCSSPadding(style().paddingStart()); }
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LayoutUnit computedCSSPaddingEnd() const { return computedCSSPadding(style().paddingEnd()); }
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// These functions are used during layout. Table cells and the MathML
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// code override them to include some extra intrinsic padding.
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virtual LayoutUnit paddingTop() const { return computedCSSPaddingTop(); }
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virtual LayoutUnit paddingBottom() const { return computedCSSPaddingBottom(); }
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virtual LayoutUnit paddingLeft() const { return computedCSSPaddingLeft(); }
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virtual LayoutUnit paddingRight() const { return computedCSSPaddingRight(); }
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virtual LayoutUnit paddingBefore() const { return computedCSSPaddingBefore(); }
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virtual LayoutUnit paddingAfter() const { return computedCSSPaddingAfter(); }
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virtual LayoutUnit paddingStart() const { return computedCSSPaddingStart(); }
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virtual LayoutUnit paddingEnd() const { return computedCSSPaddingEnd(); }
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virtual LayoutUnit borderTop() const { return LayoutUnit(style().borderTopWidth()); }
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virtual LayoutUnit borderBottom() const { return LayoutUnit(style().borderBottomWidth()); }
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virtual LayoutUnit borderLeft() const { return LayoutUnit(style().borderLeftWidth()); }
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virtual LayoutUnit borderRight() const { return LayoutUnit(style().borderRightWidth()); }
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virtual LayoutUnit horizontalBorderExtent() const { return borderLeft() + borderRight(); }
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virtual LayoutUnit verticalBorderExtent() const { return borderTop() + borderBottom(); }
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virtual LayoutUnit borderBefore() const { return LayoutUnit(style().borderBeforeWidth()); }
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virtual LayoutUnit borderAfter() const { return LayoutUnit(style().borderAfterWidth()); }
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virtual LayoutUnit borderStart() const { return LayoutUnit(style().borderStartWidth()); }
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virtual LayoutUnit borderEnd() const { return LayoutUnit(style().borderEndWidth()); }
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LayoutUnit borderAndPaddingStart() const { return borderStart() + paddingStart(); }
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LayoutUnit borderAndPaddingBefore() const { return borderBefore() + paddingBefore(); }
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LayoutUnit borderAndPaddingAfter() const { return borderAfter() + paddingAfter(); }
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LayoutUnit verticalBorderAndPaddingExtent() const { return borderTop() + borderBottom() + paddingTop() + paddingBottom(); }
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LayoutUnit horizontalBorderAndPaddingExtent() const { return borderLeft() + borderRight() + paddingLeft() + paddingRight(); }
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LayoutUnit borderAndPaddingLogicalHeight() const { return borderAndPaddingBefore() + borderAndPaddingAfter(); }
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LayoutUnit borderAndPaddingLogicalWidth() const { return borderStart() + borderEnd() + paddingStart() + paddingEnd(); }
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LayoutUnit borderAndPaddingLogicalLeft() const { return style().isHorizontalWritingMode() ? borderLeft() + paddingLeft() : borderTop() + paddingTop(); }
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LayoutUnit borderLogicalLeft() const { return style().isHorizontalWritingMode() ? borderLeft() : borderTop(); }
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LayoutUnit borderLogicalRight() const { return style().isHorizontalWritingMode() ? borderRight() : borderBottom(); }
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LayoutUnit borderLogicalWidth() const { return borderStart() + borderEnd(); }
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LayoutUnit borderLogicalHeight() const { return borderBefore() + borderAfter(); }
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LayoutUnit paddingLogicalLeft() const { return style().isHorizontalWritingMode() ? paddingLeft() : paddingTop(); }
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LayoutUnit paddingLogicalRight() const { return style().isHorizontalWritingMode() ? paddingRight() : paddingBottom(); }
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LayoutUnit paddingLogicalWidth() const { return paddingStart() + paddingEnd(); }
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LayoutUnit paddingLogicalHeight() const { return paddingBefore() + paddingAfter(); }
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virtual LayoutUnit marginTop() const = 0;
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virtual LayoutUnit marginBottom() const = 0;
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virtual LayoutUnit marginLeft() const = 0;
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virtual LayoutUnit marginRight() const = 0;
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virtual LayoutUnit marginBefore(const RenderStyle* otherStyle = nullptr) const = 0;
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virtual LayoutUnit marginAfter(const RenderStyle* otherStyle = nullptr) const = 0;
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virtual LayoutUnit marginStart(const RenderStyle* otherStyle = nullptr) const = 0;
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virtual LayoutUnit marginEnd(const RenderStyle* otherStyle = nullptr) const = 0;
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LayoutUnit verticalMarginExtent() const { return marginTop() + marginBottom(); }
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LayoutUnit horizontalMarginExtent() const { return marginLeft() + marginRight(); }
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LayoutUnit marginLogicalHeight() const { return marginBefore() + marginAfter(); }
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LayoutUnit marginLogicalWidth() const { return marginStart() + marginEnd(); }
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bool hasInlineDirectionBordersPaddingOrMargin() const { return hasInlineDirectionBordersOrPadding() || marginStart()|| marginEnd(); }
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bool hasInlineDirectionBordersOrPadding() const { return borderStart() || borderEnd() || paddingStart()|| paddingEnd(); }
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virtual LayoutUnit containingBlockLogicalWidthForContent() const;
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void paintBorder(const PaintInfo&, const LayoutRect&, const RenderStyle&, BackgroundBleedAvoidance = BackgroundBleedNone, bool includeLogicalLeftEdge = true, bool includeLogicalRightEdge = true);
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bool paintNinePieceImage(GraphicsContext&, const LayoutRect&, const RenderStyle&, const NinePieceImage&, CompositeOperator = CompositeOperator::SourceOver);
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void paintBoxShadow(const PaintInfo&, const LayoutRect&, const RenderStyle&, ShadowStyle, bool includeLogicalLeftEdge = true, bool includeLogicalRightEdge = true);
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void paintFillLayerExtended(const PaintInfo&, const Color&, const FillLayer&, const LayoutRect&, BackgroundBleedAvoidance, LegacyInlineFlowBox* = nullptr, const LayoutSize& = LayoutSize(), CompositeOperator = CompositeOperator::SourceOver, RenderElement* backgroundObject = nullptr, BaseBackgroundColorUsage = BaseBackgroundColorUse);
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virtual bool boxShadowShouldBeAppliedToBackground(const LayoutPoint& absolutePaintPostion, BackgroundBleedAvoidance, LegacyInlineFlowBox* = nullptr) const;
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// Overridden by subclasses to determine line height and baseline position.
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virtual LayoutUnit lineHeight(bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const = 0;
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virtual LayoutUnit baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const = 0;
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void mapAbsoluteToLocalPoint(OptionSet<MapCoordinatesMode>, TransformState&) const override;
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void setSelectionState(HighlightState) override;
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bool canHaveBoxInfoInFragment() const { return !isFloating() && !isReplaced() && !isInline() && !isTableCell() && isRenderBlock() && !isRenderSVGBlock(); }
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void getGeometryForBackgroundImage(const RenderLayerModelObject* paintContainer, const LayoutPoint& paintOffset, FloatRect& destRect, FloatSize& phase, FloatSize& tileSize) const;
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void contentChanged(ContentChangeType);
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bool hasAcceleratedCompositing() const;
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RenderBoxModelObject* continuation() const;
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WEBCORE_EXPORT RenderInline* inlineContinuation() const;
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void insertIntoContinuationChainAfter(RenderBoxModelObject&);
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void removeFromContinuationChain();
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virtual LayoutRect paintRectToClipOutFromBorder(const LayoutRect&) { return LayoutRect(); };
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bool hasRunningAcceleratedAnimations() const;
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virtual std::optional<LayoutUnit> overridingContainingBlockContentWidth() const { ASSERT_NOT_REACHED(); return -1_lu; }
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virtual std::optional<LayoutUnit> overridingContainingBlockContentHeight() const { ASSERT_NOT_REACHED(); return -1_lu; }
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virtual bool hasOverridingContainingBlockContentWidth() const { return false; }
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virtual bool hasOverridingContainingBlockContentHeight() const { return false; }
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protected:
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RenderBoxModelObject(Element&, RenderStyle&&, BaseTypeFlags);
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RenderBoxModelObject(Document&, RenderStyle&&, BaseTypeFlags);
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void willBeDestroyed() override;
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LayoutPoint adjustedPositionRelativeToOffsetParent(const LayoutPoint&) const;
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bool hasVisibleBoxDecorationStyle() const;
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BackgroundImageGeometry calculateBackgroundImageGeometry(const RenderLayerModelObject* paintContainer, const FillLayer&, const LayoutPoint& paintOffset,
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const LayoutRect& paintRect, RenderElement* = nullptr) const;
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bool borderObscuresBackgroundEdge(const FloatSize& contextScale) const;
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bool borderObscuresBackground() const;
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RoundedRect backgroundRoundedRectAdjustedForBleedAvoidance(const GraphicsContext&, const LayoutRect&, BackgroundBleedAvoidance, LegacyInlineFlowBox*, const LayoutSize&, bool includeLogicalLeftEdge, bool includeLogicalRightEdge) const;
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LayoutRect borderInnerRectAdjustedForBleedAvoidance(const GraphicsContext&, const LayoutRect&, BackgroundBleedAvoidance) const;
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InterpolationQuality chooseInterpolationQuality(GraphicsContext&, Image&, const void*, const LayoutSize&);
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static bool shouldAntialiasLines(GraphicsContext&);
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static void clipRoundedInnerRect(GraphicsContext&, const FloatRect&, const FloatRoundedRect& clipRect);
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bool hasAutoHeightOrContainingBlockWithAutoHeight() const;
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DecodingMode decodingModeForImageDraw(const Image&, const PaintInfo&) const;
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public:
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// For RenderBlocks and RenderInlines with m_style->styleType() == PseudoId::FirstLetter, this tracks their remaining text fragments
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RenderTextFragment* firstLetterRemainingText() const;
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void setFirstLetterRemainingText(RenderTextFragment&);
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void clearFirstLetterRemainingText();
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enum ScaleByEffectiveZoomOrNot { ScaleByEffectiveZoom, DoNotScaleByEffectiveZoom };
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LayoutSize calculateImageIntrinsicDimensions(StyleImage*, const LayoutSize& scaledPositioningAreaSize, ScaleByEffectiveZoomOrNot) const;
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RenderBlock* containingBlockForAutoHeightDetection(Length logicalHeight) const;
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struct ContinuationChainNode {
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WeakPtr<RenderBoxModelObject> renderer;
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ContinuationChainNode* previous { nullptr };
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ContinuationChainNode* next { nullptr };
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ContinuationChainNode(RenderBoxModelObject&);
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~ContinuationChainNode();
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void insertAfter(ContinuationChainNode&);
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WTF_MAKE_FAST_ALLOCATED;
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};
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ContinuationChainNode* continuationChainNode() const;
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protected:
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WEBCORE_EXPORT LayoutUnit computedCSSPadding(const Length&) const;
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virtual void absoluteQuadsIgnoringContinuation(const FloatRect&, Vector<FloatQuad>&, bool* /*wasFixed*/) const { ASSERT_NOT_REACHED(); }
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void collectAbsoluteQuadsForContinuation(Vector<FloatQuad>& quads, bool* wasFixed) const;
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private:
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ContinuationChainNode& ensureContinuationChainNode();
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virtual LayoutRect frameRectForStickyPositioning() const = 0;
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LayoutSize calculateFillTileSize(const FillLayer&, const LayoutSize& scaledPositioningAreaSize) const;
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RoundedRect getBackgroundRoundedRect(const LayoutRect&, LegacyInlineFlowBox*, LayoutUnit inlineBoxWidth, LayoutUnit inlineBoxHeight,
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bool includeLogicalLeftEdge, bool includeLogicalRightEdge) const;
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bool fixedBackgroundPaintsInLocalCoordinates() const;
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void clipBorderSidePolygon(GraphicsContext&, const RoundedRect& outerBorder, const RoundedRect& innerBorder,
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BoxSide, bool firstEdgeMatches, bool secondEdgeMatches);
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void paintOneBorderSide(GraphicsContext&, const RenderStyle&, const RoundedRect& outerBorder, const RoundedRect& innerBorder,
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const LayoutRect& sideRect, BoxSide, BoxSide adjacentSide1, BoxSide adjacentSide2, const BorderEdges&,
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const Path*, BackgroundBleedAvoidance, bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias, const Color* overrideColor = nullptr);
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void paintTranslucentBorderSides(GraphicsContext&, const RenderStyle&, const RoundedRect& outerBorder, const RoundedRect& innerBorder, const IntPoint& innerBorderAdjustment,
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const BorderEdges&, BoxSideSet, BackgroundBleedAvoidance, bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias = false);
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void paintBorderSides(GraphicsContext&, const RenderStyle&, const RoundedRect& outerBorder, const RoundedRect& innerBorder,
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const IntPoint& innerBorderAdjustment, const BorderEdges&, BoxSideSet, BackgroundBleedAvoidance,
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bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias = false, const Color* overrideColor = nullptr);
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void drawBoxSideFromPath(GraphicsContext&, const LayoutRect&, const Path&, const BorderEdges&,
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float thickness, float drawThickness, BoxSide, const RenderStyle&,
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Color, BorderStyle, BackgroundBleedAvoidance, bool includeLogicalLeftEdge, bool includeLogicalRightEdge);
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void paintMaskForTextFillBox(ImageBuffer*, const FloatRect&, LegacyInlineFlowBox*, const LayoutRect&);
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};
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} // namespace WebCore
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SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderBoxModelObject, isBoxModelObject())
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