DEV/flutter_flutter
1
0
Fork 0
mirror of https://github.com/flutter/flutter.git synced 2026-02-20 02:29:02 +08:00
Code Issues Packages Projects Releases Wiki Activity
flutter_flutter/sky/engine/core/rendering/RenderBox.h
Michael Goderbauer 08961f8ec5 Format all c-like sources with clang-format (#4088) 
* format

* license script adaptions

* updated licenses

* review comments
2017-09-12 15:36:20 -07:00

826 lines
32 KiB
C++
Raw Blame History

/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2003, 2006, 2007 Apple 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.
*
*/
#ifndef SKY_ENGINE_CORE_RENDERING_RENDERBOX_H_
#define SKY_ENGINE_CORE_RENDERING_RENDERBOX_H_
#include "flutter/sky/engine/core/rendering/RenderBoxModelObject.h"
#include "flutter/sky/engine/core/rendering/RenderOverflow.h"
namespace blink {
struct LayerPaintingInfo;
struct PaintInfo;
class HitTestingTransformState;
class TransformationMatrix;
enum SizeType { MainOrPreferredSize, MinSize, MaxSize };
enum AvailableLogicalHeightType {
ExcludeMarginBorderPadding,
IncludeMarginBorderPadding
};
enum MarginDirection { BlockDirection, InlineDirection };
enum ShouldComputePreferred { ComputeActual, ComputePreferred };
enum ContentsClipBehavior { ForceContentsClip, SkipContentsClipIfPossible };
struct RenderBoxRareData {
WTF_MAKE_NONCOPYABLE(RenderBoxRareData);
WTF_MAKE_FAST_ALLOCATED;
public:
RenderBoxRareData()
: m_inlineBoxWrapper(0),
m_overrideLogicalContentHeight(-1),
m_overrideLogicalContentWidth(-1) {}
// For inline replaced elements, the inline box that owns us.
InlineBox* m_inlineBoxWrapper;
LayoutUnit m_overrideLogicalContentHeight;
LayoutUnit m_overrideLogicalContentWidth;
};
enum LayerType {
NoLayer,
NormalLayer,
// An overflow clip layer is required for bookkeeping purposes,
// but does not force a layer to be self painting.
OverflowClipLayer,
};
struct FontBaselineOrAuto {
FontBaselineOrAuto() : m_auto(true), m_baseline(AlphabeticBaseline) {}
FontBaselineOrAuto(FontBaseline baseline)
: m_auto(false), m_baseline(baseline) {}
bool m_auto;
FontBaseline m_baseline;
};
class RenderBox : public RenderBoxModelObject {
public:
explicit RenderBox();
// hasAutoZIndex only returns true if the element is positioned or a flex-item
// since position:static elements that are not flex-items get their z-index
// coerced to auto.
virtual LayerType layerTypeRequired() const {
if (isPositioned() || createsGroup() || hasClipPath() || hasTransform() ||
!style()->hasAutoZIndex())
return NormalLayer;
if (hasOverflowClip())
return OverflowClipLayer;
return NoLayer;
}
void destroyLayer();
void createLayer(LayerType);
bool hasSelfPaintingLayer() const;
RenderLayer* layer() const { return m_layer.get(); }
// Use this with caution! No type checking is done!
RenderBox* firstChildBox() const;
RenderBox* lastChildBox() const;
LayoutUnit x() const { return m_frameRect.x(); }
LayoutUnit y() const { return m_frameRect.y(); }
LayoutUnit width() const { return m_frameRect.width(); }
LayoutUnit height() const { return m_frameRect.height(); }
int pixelSnappedWidth() const { return m_frameRect.pixelSnappedWidth(); }
int pixelSnappedHeight() const { return m_frameRect.pixelSnappedHeight(); }
// These represent your location relative to your container as a physical
// offset. In layout related methods you almost always want the logical
// location (e.g. x() and y()).
LayoutUnit top() const { return location().y(); }
LayoutUnit left() const { return location().x(); }
void setX(LayoutUnit x) { m_frameRect.setX(x); }
void setY(LayoutUnit y) { m_frameRect.setY(y); }
void setWidth(LayoutUnit width) { m_frameRect.setWidth(width); }
void setHeight(LayoutUnit height) { m_frameRect.setHeight(height); }
LayoutUnit logicalLeft() const { return x(); }
LayoutUnit logicalRight() const { return logicalLeft() + logicalWidth(); }
LayoutUnit logicalTop() const { return y(); }
LayoutUnit logicalBottom() const { return logicalTop() + logicalHeight(); }
LayoutUnit logicalWidth() const { return width(); }
LayoutUnit logicalHeight() const { return height(); }
LayoutUnit constrainLogicalWidthByMinMax(LayoutUnit,
LayoutUnit,
RenderBlock*) const;
LayoutUnit constrainLogicalHeightByMinMax(
LayoutUnit logicalHeight,
LayoutUnit intrinsicContentHeight) const;
LayoutUnit constrainContentBoxLogicalHeightByMinMax(
LayoutUnit logicalHeight,
LayoutUnit intrinsicContentHeight) const;
int pixelSnappedLogicalHeight() const { return pixelSnappedHeight(); }
int pixelSnappedLogicalWidth() const { return pixelSnappedWidth(); }
void setLogicalLeft(LayoutUnit left) { setX(left); }
void setLogicalTop(LayoutUnit top) { setY(top); }
void setLogicalLocation(const LayoutPoint& location) {
setLocation(location);
}
void setLogicalWidth(LayoutUnit size) { setWidth(size); }
void setLogicalHeight(LayoutUnit size) { setHeight(size); }
void setLogicalSize(const LayoutSize& size) { setSize(size); }
LayoutPoint location() const { return m_frameRect.location(); }
LayoutSize locationOffset() const { return LayoutSize(x(), y()); }
LayoutSize size() const { return m_frameRect.size(); }
IntSize pixelSnappedSize() const { return m_frameRect.pixelSnappedSize(); }
void setLocation(const LayoutPoint& location) {
m_frameRect.setLocation(location);
}
void setSize(const LayoutSize& size) { m_frameRect.setSize(size); }
void move(LayoutUnit dx, LayoutUnit dy) { m_frameRect.move(dx, dy); }
LayoutRect frameRect() const { return m_frameRect; }
IntRect pixelSnappedFrameRect() const {
return pixelSnappedIntRect(m_frameRect);
}
void setFrameRect(const LayoutRect& rect) { m_frameRect = rect; }
LayoutRect borderBoxRect() const { return LayoutRect(LayoutPoint(), size()); }
LayoutRect paddingBoxRect() const {
return LayoutRect(borderLeft(), borderTop(), clientWidth(), clientHeight());
}
IntRect pixelSnappedBorderBoxRect() const {
return IntRect(IntPoint(), m_frameRect.pixelSnappedSize());
}
virtual IntRect borderBoundingBox() const override final {
return pixelSnappedBorderBoxRect();
}
// The content area of the box (excludes padding - and intrinsic padding for
// table cells, etc... - and border).
LayoutRect contentBoxRect() const {
return LayoutRect(borderLeft() + paddingLeft(), borderTop() + paddingTop(),
contentWidth(), contentHeight());
}
// The content box in absolute coords. Ignores transforms.
IntRect absoluteContentBox() const;
// The content box converted to absolute coords (taking transforms into
// account).
FloatQuad absoluteContentQuad() const;
FloatPoint perspectiveOrigin() const;
// This returns the content area of the box (excluding padding and border).
// The only difference with contentBoxRect is that computedCSSContentBoxRect
// does include the intrinsic padding in the content box as this is what some
// callers expect (like getComputedStyle).
LayoutRect computedCSSContentBoxRect() const {
return LayoutRect(
borderLeft() + computedCSSPaddingLeft(),
borderTop() + computedCSSPaddingTop(),
clientWidth() - computedCSSPaddingLeft() - computedCSSPaddingRight(),
clientHeight() - computedCSSPaddingTop() - computedCSSPaddingBottom());
}
virtual void addFocusRingRects(
Vector<IntRect>&,
const LayoutPoint& additionalOffset,
const RenderBox* paintContainer = 0) const override;
// Use this with caution! No type checking is done!
RenderBox* previousSiblingBox() const;
RenderBox* nextSiblingBox() const;
RenderBox* parentBox() const;
// Visual and layout overflow are in the coordinate space of the box. This
// means that they aren't purely physical directions. For horizontal-tb and
// vertical-lr they will match physical directions, but for horizontal-bt and
// vertical-rl, the top/bottom and left/right respectively are flipped when
// compared to their physical counterparts. For example minX is on the left
// in vertical-lr, but it is on the right in vertical-rl.
LayoutRect layoutOverflowRect() const {
return m_overflow ? m_overflow->layoutOverflowRect() : paddingBoxRect();
}
IntRect pixelSnappedLayoutOverflowRect() const {
return pixelSnappedIntRect(layoutOverflowRect());
}
LayoutSize maxLayoutOverflow() const {
return LayoutSize(layoutOverflowRect().maxX(), layoutOverflowRect().maxY());
}
LayoutUnit logicalLefxlayoutOverflow() const {
return layoutOverflowRect().x();
}
LayoutUnit logicalRightLayoutOverflow() const {
return layoutOverflowRect().maxX();
}
virtual LayoutRect visualOverflowRect() const {
return m_overflow ? m_overflow->visualOverflowRect() : borderBoxRect();
}
LayoutUnit logicalLeftVisualOverflow() const {
return visualOverflowRect().x();
}
LayoutUnit logicalRightVisualOverflow() const {
return visualOverflowRect().maxX();
}
LayoutRect contentsVisualOverflowRect() const {
return m_overflow ? m_overflow->contentsVisualOverflowRect() : LayoutRect();
}
void addLayoutOverflow(const LayoutRect&);
void addVisualOverflow(const LayoutRect&);
// Clipped by the contents clip, if one exists.
void addContentsVisualOverflow(const LayoutRect&);
void addVisualEffectOverflow();
LayoutBoxExtent computeVisualEffectOverflowExtent() const;
void addOverflowFromChild(RenderBox* child) {
addOverflowFromChild(child, child->locationOffset());
}
void addOverflowFromChild(RenderBox* child, const LayoutSize& delta);
void clearLayoutOverflow();
void clearAllOverflows() { m_overflow.clear(); }
void updateLayerTransformAfterLayout();
// This transform has the transform-origin baked in.
TransformationMatrix* transform() const { return m_transform.get(); }
bool has3DTransform() const {
return m_transform && !m_transform->isAffine();
}
LayoutUnit contentWidth() const {
return clientWidth() - paddingLeft() - paddingRight();
}
LayoutUnit contentHeight() const {
return clientHeight() - paddingTop() - paddingBottom();
}
LayoutUnit contentLogicalWidth() const { return contentWidth(); }
LayoutUnit contentLogicalHeight() const { return contentHeight(); }
// IE extensions. Used to calculate offsetWidth/Height. Overridden by inlines
// (RenderFlow) to return the remaining width on a given line (and the height
// of a single line).
virtual LayoutUnit offsetWidth() const override { return width(); }
virtual LayoutUnit offsetHeight() const override { return height(); }
virtual int pixelSnappedOffsetWidth() const override final;
virtual int pixelSnappedOffsetHeight() const override final;
// More IE extensions. clientWidth and clientHeight represent the interior of
// an object excluding border and scrollbar. clientLeft/Top are just the
// borderLeftWidth and borderTopWidth.
LayoutUnit clientLeft() const { return borderLeft(); }
LayoutUnit clientTop() const { return borderTop(); }
LayoutUnit clientWidth() const;
LayoutUnit clientHeight() const;
LayoutUnit clientLogicalWidth() const { return clientWidth(); }
LayoutUnit clientLogicalHeight() const { return clientHeight(); }
LayoutUnit clientLogicalBottom() const {
return borderBefore() + clientLogicalHeight();
}
LayoutRect clientBoxRect() const {
return LayoutRect(clientLeft(), clientTop(), clientWidth(), clientHeight());
}
int pixelSnappedClientWidth() const;
int pixelSnappedClientHeight() const;
virtual LayoutUnit marginTop() const override { return m_marginBox.top(); }
virtual LayoutUnit marginBottom() const override {
return m_marginBox.bottom();
}
virtual LayoutUnit marginLeft() const override { return m_marginBox.left(); }
virtual LayoutUnit marginRight() const override {
return m_marginBox.right();
}
void setMarginTop(LayoutUnit margin) { m_marginBox.setTop(margin); }
void setMarginBottom(LayoutUnit margin) { m_marginBox.setBottom(margin); }
void setMarginLeft(LayoutUnit margin) { m_marginBox.setLeft(margin); }
void setMarginRight(LayoutUnit margin) { m_marginBox.setRight(margin); }
LayoutUnit marginLogicalLeft() const { return m_marginBox.logicalLeft(); }
LayoutUnit marginLogicalRight() const { return m_marginBox.logicalRight(); }
virtual LayoutUnit marginBefore(
const RenderStyle* overrideStyle = 0) const override final {
return m_marginBox.before();
}
virtual LayoutUnit marginAfter(
const RenderStyle* overrideStyle = 0) const override final {
return m_marginBox.after();
}
virtual LayoutUnit marginStart(
const RenderStyle* overrideStyle = 0) const override final {
const RenderStyle* styleToUse = overrideStyle ? overrideStyle : style();
return m_marginBox.start(styleToUse->direction());
}
virtual LayoutUnit marginEnd(
const RenderStyle* overrideStyle = 0) const override final {
const RenderStyle* styleToUse = overrideStyle ? overrideStyle : style();
return m_marginBox.end(styleToUse->direction());
}
void setMarginBefore(LayoutUnit value, const RenderStyle* overrideStyle = 0) {
m_marginBox.setBefore(value);
}
void setMarginAfter(LayoutUnit value, const RenderStyle* overrideStyle = 0) {
m_marginBox.setAfter(value);
}
void setMarginStart(LayoutUnit value, const RenderStyle* overrideStyle = 0) {
const RenderStyle* styleToUse = overrideStyle ? overrideStyle : style();
m_marginBox.setStart(styleToUse->direction(), value);
}
void setMarginEnd(LayoutUnit value, const RenderStyle* overrideStyle = 0) {
const RenderStyle* styleToUse = overrideStyle ? overrideStyle : style();
m_marginBox.setEnd(styleToUse->direction(), value);
}
virtual void absoluteQuads(Vector<FloatQuad>&) const override;
bool hitTestLayer(RenderLayer* rootLayer,
RenderLayer* containerLayer,
const HitTestRequest& request,
HitTestResult& result,
const LayoutRect& hitTestRect,
const HitTestLocation& hitTestLocation,
const HitTestingTransformState* transformState = 0,
double* zOffset = 0);
void paintLayer(GraphicsContext*, const LayerPaintingInfo&);
virtual void layout() override;
virtual void paint(PaintInfo&,
const LayoutPoint&,
Vector<RenderBox*>& layers) override;
virtual bool nodeAtPoint(const HitTestRequest&,
HitTestResult&,
const HitTestLocation& locationInContainer,
const LayoutPoint& accumulatedOffset) override;
virtual LayoutUnit minPreferredLogicalWidth() const override;
virtual LayoutUnit maxPreferredLogicalWidth() const override;
void setMinPreferredLogicalWidth(LayoutUnit);
void setMaxPreferredLogicalWidth(LayoutUnit);
// FIXME: We should rename these back to overrideLogicalHeight/Width and have
// them store the border-box height/width like the regular height/width
// accessors on RenderBox. Right now, these are different than
// contentHeight/contentWidth because they still include the scrollbar
// height/width.
LayoutUnit overrideLogicalContentWidth() const;
LayoutUnit overrideLogicalContentHeight() const;
bool hasOverrideHeight() const;
bool hasOverrideWidth() const;
void setOverrideLogicalContentHeight(LayoutUnit);
void setOverrideLogicalContentWidth(LayoutUnit);
void clearOverrideSize();
void clearOverrideLogicalContentHeight();
void clearOverrideLogicalContentWidth();
virtual LayoutSize offsetFromContainer(
const RenderObject*,
const LayoutPoint&,
bool* offsetDependsOnPoint = 0) const override;
LayoutUnit adjustBorderBoxLogicalWidthForBoxSizing(LayoutUnit width) const;
LayoutUnit adjustBorderBoxLogicalHeightForBoxSizing(LayoutUnit height) const;
LayoutUnit adjustContentBoxLogicalWidthForBoxSizing(LayoutUnit width) const;
LayoutUnit adjustContentBoxLogicalHeightForBoxSizing(LayoutUnit height) const;
struct ComputedMarginValues {
ComputedMarginValues() {}
LayoutUnit m_before;
LayoutUnit m_after;
LayoutUnit m_start;
LayoutUnit m_end;
};
struct LogicalExtentComputedValues {
LogicalExtentComputedValues() {}
LayoutUnit m_extent;
LayoutUnit m_position;
ComputedMarginValues m_margins;
};
// Resolve auto margins in the chosen direction of the containing block so
// that objects can be pushed to the start, middle or end of the containing
// block.
void computeMarginsForDirection(MarginDirection forDirection,
const RenderBlock* containingBlock,
LayoutUnit containerWidth,
LayoutUnit childWidth,
LayoutUnit& marginStart,
LayoutUnit& marginEnd,
Length marginStartLength,
Length marginStartEnd) const;
// Used to resolve margins in the containing block's block-flow direction.
void computeAndSetBlockDirectionMargins(const RenderBlock* containingBlock);
void positionLineBox(InlineBox*);
virtual InlineBox* createInlineBox();
void dirtyLineBoxes(bool fullLayout);
// For inline replaced elements, this function returns the inline box that
// owns us. Enables the replaced RenderObject to quickly determine what line
// it is contained on and to easily iterate over structures on the line.
InlineBox* inlineBoxWrapper() const {
return m_rareData ? m_rareData->m_inlineBoxWrapper : 0;
}
void setInlineBoxWrapper(InlineBox*);
void deleteLineBoxWrapper();
LayoutUnit containingBlockLogicalHeightForContent(
AvailableLogicalHeightType) const;
virtual void updateLogicalWidth();
virtual void updateLogicalHeight();
virtual void computeLogicalHeight(LayoutUnit logicalHeight,
LayoutUnit logicalTop,
LogicalExtentComputedValues&) const;
void computeLogicalWidth(LogicalExtentComputedValues&) const;
virtual LayoutSize intrinsicSize() const { return LayoutSize(); }
LayoutUnit intrinsicLogicalWidth() const { return intrinsicSize().width(); }
LayoutUnit intrinsicLogicalHeight() const { return intrinsicSize().height(); }
virtual LayoutUnit intrinsicContentLogicalHeight() const {
return m_intrinsicContentLogicalHeight;
}
// Whether or not the element shrinks to its intrinsic width (rather than
// filling the width of a containing block). HTML4 buttons, <select>s,
// <input>s, legends, and floating/compact elements do this.
bool sizesLogicalWidthToFitContent(const Length& logicalWidth) const;
LayoutUnit computeLogicalWidthUsing(SizeType,
const Length& logicalWidth,
LayoutUnit availableLogicalWidth,
const RenderBlock* containingBlock) const;
LayoutUnit computeLogicalHeightUsing(const Length& height,
LayoutUnit intrinsicContentHeight) const;
LayoutUnit computeContentLogicalHeight(
const Length& height,
LayoutUnit intrinsicContentHeight) const;
LayoutUnit computeContentLogicalHeightUsing(
const Length& height,
LayoutUnit intrinsicContentHeight) const;
LayoutUnit computeReplacedLogicalWidthUsing(const Length& width) const;
LayoutUnit computeReplacedLogicalWidthRespectingMinMaxWidth(
LayoutUnit logicalWidth,
ShouldComputePreferred = ComputeActual) const;
LayoutUnit computeReplacedLogicalHeightUsing(const Length& height) const;
LayoutUnit computeReplacedLogicalHeightRespectingMinMaxHeight(
LayoutUnit logicalHeight) const;
virtual LayoutUnit computeReplacedLogicalWidth(
ShouldComputePreferred = ComputeActual) const;
virtual LayoutUnit computeReplacedLogicalHeight() const;
// Block flows subclass availableWidth/Height to handle multi column layout
// (shrinking the width/height available to children when laying out.)
virtual LayoutUnit availableLogicalWidth() const {
return contentLogicalWidth();
}
virtual LayoutUnit availableLogicalHeight(AvailableLogicalHeightType) const;
LayoutUnit availableLogicalHeightUsing(const Length&,
AvailableLogicalHeightType) const;
// There are a few cases where we need to refer specifically to the available
// physical width and available physical height. Relative positioning is one
// of those cases, since left/top offsets are physical.
LayoutUnit availableWidth() const { return availableLogicalWidth(); }
LayoutUnit availableHeight() const {
return availableLogicalHeight(IncludeMarginBorderPadding);
}
virtual LayoutRect localCaretRect(
InlineBox*,
int caretOffset,
LayoutUnit* extraWidthToEndOfLine = 0) override;
virtual LayoutRect overflowClipRect(const LayoutPoint& location);
LayoutRect clipRect(const LayoutPoint& location);
bool pushContentsClip(PaintInfo&,
const LayoutPoint& accumulatedOffset,
ContentsClipBehavior);
void popContentsClip(PaintInfo&, const LayoutPoint& accumulatedOffset);
virtual void paintBoxDecorationBackground(PaintInfo&, const LayoutPoint&);
// Called when a positioned object moves but doesn't necessarily change size.
// A simplified layout is attempted that just updates the object's position.
// If the size does change, the object remains dirty.
bool tryLayoutDoingPositionedMovementOnly() {
LayoutUnit oldWidth = width();
updateLogicalWidth();
// If we shrink to fit our width may have changed, so we still need full
// layout.
if (oldWidth != width())
return false;
updateLogicalHeight();
return true;
}
virtual PositionWithAffinity positionForPoint(const LayoutPoint&) override;
void removeFloatingOrPositionedChildFromBlockLists();
RenderLayer* enclosingFloatPaintingLayer() const;
virtual int firstLineBoxBaseline(FontBaselineOrAuto baselineType) const {
return -1;
}
virtual int inlineBlockBaseline(LineDirectionMode) const {
return -1;
} // Returns -1 if we should skip this box when computing the baseline of an
// inline-block.
bool isFlexItem() const {
return !isInline() && !isFloatingOrOutOfFlowPositioned() && parent() &&
parent()->isFlexibleBox();
}
virtual LayoutUnit lineHeight(
bool firstLine,
LineDirectionMode,
LinePositionMode = PositionOnContainingLine) const override;
virtual int baselinePosition(
FontBaseline,
bool firstLine,
LineDirectionMode,
LinePositionMode = PositionOnContainingLine) const override;
virtual LayoutUnit offsetLeft() const override;
virtual LayoutUnit offsetTop() const override;
LayoutRect layoutOverflowRectForPropagation() const;
bool hasRenderOverflow() const { return m_overflow; }
bool hasVisualOverflow() const {
return m_overflow &&
!borderBoxRect().contains(m_overflow->visualOverflowRect());
}
virtual bool needsPreferredWidthsRecalculation() const;
virtual void computeIntrinsicRatioInformation(
FloatSize& /* intrinsicSize */,
double& /* intrinsicRatio */) const {}
virtual bool hasRelativeLogicalHeight() const;
bool hasSameDirectionAs(const RenderBox* object) const {
return style()->direction() == object->style()->direction();
}
protected:
virtual void willBeDestroyed() override;
virtual void styleWillChange(StyleDifference,
const RenderStyle& newStyle) override;
virtual void styleDidChange(StyleDifference,
const RenderStyle* oldStyle) override;
void paintBackground(const PaintInfo&,
const LayoutRect&,
const Color& backgroundColor,
BackgroundBleedAvoidance = BackgroundBleedNone);
void paintFillLayer(const PaintInfo&,
const Color&,
const FillLayer&,
const LayoutRect&,
BackgroundBleedAvoidance,
RenderObject* backgroundObject,
bool skipBaseColor = false);
void paintFillLayers(const PaintInfo&,
const Color&,
const FillLayer&,
const LayoutRect&,
BackgroundBleedAvoidance = BackgroundBleedNone,
RenderObject* backgroundObject = 0);
void paintBoxDecorationBackgroundWithRect(PaintInfo&,
const LayoutPoint&,
const LayoutRect&);
// Information extracted from RenderStyle for box painting.
// These are always needed during box painting and recomputing them takes
// time.
struct BoxDecorationData {
BoxDecorationData(const RenderStyle&);
Color backgroundColor;
bool hasBackground;
bool hasBorder;
};
BackgroundBleedAvoidance determineBackgroundBleedAvoidance(
GraphicsContext*,
const BoxDecorationData&) const;
bool backgroundHasOpaqueTopLayer() const;
void computePositionedLogicalWidth(LogicalExtentComputedValues&) const;
LayoutUnit computeIntrinsicLogicalWidthUsing(
const Length& logicalWidthLength,
LayoutUnit availableLogicalWidth,
LayoutUnit borderAndPadding) const;
LayoutUnit computeIntrinsicLogicalContentHeightUsing(
const Length& logicalHeightLength,
LayoutUnit intrinsicContentHeight,
LayoutUnit borderAndPadding) const;
virtual bool shouldComputeSizeAsReplaced() const {
return isReplaced() && !isInlineBlock();
}
virtual void mapLocalToContainer(
const RenderBox* paintInvalidationContainer,
TransformState&,
MapCoordinatesFlags = ApplyContainerFlip) const override;
void updateIntrinsicContentLogicalHeight(
LayoutUnit intrinsicContentLogicalHeight) const {
m_intrinsicContentLogicalHeight = intrinsicContentLogicalHeight;
}
private:
void updateTransformationMatrix();
void updateTransform(const RenderStyle* oldStyle);
void updateFromStyle();
PassRefPtr<HitTestingTransformState> createLocalTransformState(
RenderLayer* rootLayer,
RenderLayer* containerLayer,
const LayoutRect& hitTestRect,
const HitTestLocation& hitTestLocation,
const HitTestingTransformState* containerTransformState) const;
bool hitTestNonLayerDescendants(const HitTestRequest& request,
HitTestResult& result,
const LayoutRect& layerBounds,
const HitTestLocation& hitTestLocation);
void paintLayerContents(GraphicsContext*, const LayerPaintingInfo&);
void shrinkToFitWidth(const LayoutUnit availableSpace,
const LayoutUnit logicalLeftValue,
const LayoutUnit bordersPlusPadding,
LogicalExtentComputedValues&) const;
bool skipContainingBlockForPercentHeightCalculation(
const RenderBox* containingBlock) const;
LayoutUnit containingBlockLogicalWidthForPositioned(
const RenderBoxModelObject* containingBlock) const;
LayoutUnit containingBlockLogicalHeightForPositioned(
const RenderBoxModelObject* containingBlock) const;
void computePositionedLogicalHeight(LogicalExtentComputedValues&) const;
void computePositionedLogicalWidthUsing(
Length logicalWidth,
const RenderBoxModelObject* containerBlock,
TextDirection containerDirection,
LayoutUnit containerLogicalWidth,
LayoutUnit bordersPlusPadding,
const Length& logicalLeft,
const Length& logicalRight,
const Length& marginLogicalLeft,
const Length& marginLogicalRight,
LogicalExtentComputedValues&) const;
void computePositionedLogicalHeightUsing(
Length logicalHeightLength,
const RenderBoxModelObject* containerBlock,
LayoutUnit containerLogicalHeight,
LayoutUnit bordersPlusPadding,
LayoutUnit logicalHeight,
const Length& logicalTop,
const Length& logicalBottom,
const Length& marginLogicalTop,
const Length& marginLogicalBottom,
LogicalExtentComputedValues&) const;
void computePositionedLogicalHeightReplaced(
LogicalExtentComputedValues&) const;
void computePositionedLogicalWidthReplaced(
LogicalExtentComputedValues&) const;
LayoutUnit fillAvailableMeasure(LayoutUnit availableLogicalWidth) const;
virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth,
LayoutUnit& maxLogicalWidth) const;
// This function calculates the minimum and maximum preferred widths for an
// object. These values are used in shrink-to-fit layout systems. These
// include tables, positioned objects, floats and flexible boxes.
virtual void computePreferredLogicalWidths() {
clearPreferredLogicalWidthsDirty();
}
RenderBoxRareData& ensureRareData() {
if (!m_rareData)
m_rareData = adoptPtr(new RenderBoxRareData());
return *m_rareData.get();
}
bool logicalHeightComputesAsNone(SizeType) const;
bool isBox() const =
delete; // This will catch anyone doing an unnecessary check.
// The width/height of the contents + borders + padding. The x/y location is
// relative to our container (which is not always our parent).
LayoutRect m_frameRect;
// Our intrinsic height, used for min-height: min-content etc. Maintained by
// updateLogicalHeight. This is logicalHeight() before it is clamped to
// min/max.
mutable LayoutUnit m_intrinsicContentLogicalHeight;
protected:
LayoutBoxExtent m_marginBox;
// The preferred logical width of the element if it were to break its lines at
// every possible opportunity.
LayoutUnit m_minPreferredLogicalWidth;
// The preferred logical width of the element if it never breaks any lines at
// all.
LayoutUnit m_maxPreferredLogicalWidth;
// Our overflow information.
OwnPtr<RenderOverflow> m_overflow;
// TODO(ojan): Move these two into RenderBoxRareData.
OwnPtr<TransformationMatrix> m_transform;
private:
OwnPtr<RenderLayer> m_layer;
OwnPtr<RenderBoxRareData> m_rareData;
};
DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderBox, isBox());
inline RenderBox* RenderBox::previousSiblingBox() const {
return toRenderBox(previousSibling());
}
inline RenderBox* RenderBox::nextSiblingBox() const {
return toRenderBox(nextSibling());
}
inline RenderBox* RenderBox::parentBox() const {
return toRenderBox(parent());
}
inline RenderBox* RenderBox::firstChildBox() const {
return toRenderBox(slowFirstChild());
}
inline RenderBox* RenderBox::lastChildBox() const {
return toRenderBox(slowLastChild());
}
inline void RenderBox::setInlineBoxWrapper(InlineBox* boxWrapper) {
if (boxWrapper) {
ASSERT(!inlineBoxWrapper());
// m_inlineBoxWrapper should already be 0. Deleting it is a safeguard
// against security issues. Otherwise, there will two line box wrappers
// keeping the reference to this renderer, and only one will be notified
// when the renderer is getting destroyed. The second line box wrapper will
// keep a stale reference.
if (UNLIKELY(inlineBoxWrapper() != 0))
deleteLineBoxWrapper();
}
ensureRareData().m_inlineBoxWrapper = boxWrapper;
}
} // namespace blink
#endif // SKY_ENGINE_CORE_RENDERING_RENDERBOX_H_
Reference in New Issue View Git Blame Copy Permalink