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/*
* Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2007 Rob Buis <buis@kde.org>
* Copyright (C) 2009 Google, Inc. All rights reserved.
* Copyright (C) 2009 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 LayoutSVGRoot_h
#define LayoutSVGRoot_h
#include "core/layout/LayoutReplaced.h"
namespace blink {
class SVGElement;
enum class SVGTransformChange;
class CORE_EXPORT LayoutSVGRoot final : public LayoutReplaced {
public:
explicit LayoutSVGRoot(SVGElement*);
~LayoutSVGRoot() override;
bool isEmbeddedThroughSVGImage() const;
bool isEmbeddedThroughFrameContainingSVGDocument() const;
void computeIntrinsicSizingInfo(IntrinsicSizingInfo&) const override;
// If you have a LayoutSVGRoot, use firstChild or lastChild instead.
void slowFirstChild() const = delete;
void slowLastChild() const = delete;
LayoutObject* firstChild() const {
ASSERT(children() == virtualChildren());
return children()->firstChild();
}
LayoutObject* lastChild() const {
ASSERT(children() == virtualChildren());
return children()->lastChild();
}
bool isLayoutSizeChanged() const { return m_isLayoutSizeChanged; }
bool didScreenScaleFactorChange() const {
return m_didScreenScaleFactorChange;
}
void setNeedsBoundariesUpdate() override {
m_needsBoundariesOrTransformUpdate = true;
}
void setNeedsTransformUpdate() override {
m_needsBoundariesOrTransformUpdate = true;
}
IntSize containerSize() const { return m_containerSize; }
void setContainerSize(const IntSize& containerSize) {
// SVGImage::draw() does a view layout prior to painting,
// and we need that layout to know of the new size otherwise
// the layout may be incorrectly using the old size.
if (m_containerSize != containerSize) {
setNeedsLayoutAndFullPaintInvalidation(
LayoutInvalidationReason::SizeChanged);
}
m_containerSize = containerSize;
}
// localToBorderBoxTransform maps local SVG viewport coordinates to local CSS
// box coordinates.
const AffineTransform& localToBorderBoxTransform() const {
return m_localToBorderBoxTransform;
}
bool shouldApplyViewportClip() const;
bool shouldClipOverflow() const override {
return LayoutBox::shouldClipOverflow() || shouldApplyViewportClip();
}
LayoutRect visualOverflowRect() const override;
LayoutRect overflowClipRect(
const LayoutPoint& location,
OverlayScrollbarClipBehavior = IgnoreOverlayScrollbarSize) const override;
bool hasNonIsolatedBlendingDescendants() const final;
const char* name() const override { return "LayoutSVGRoot"; }
private:
const LayoutObjectChildList* children() const { return &m_children; }
LayoutObjectChildList* children() { return &m_children; }
LayoutObjectChildList* virtualChildren() override { return children(); }
const LayoutObjectChildList* virtualChildren() const override {
return children();
}
bool isOfType(LayoutObjectType type) const override {
return type == LayoutObjectSVG || type == LayoutObjectSVGRoot ||
LayoutReplaced::isOfType(type);
}
LayoutUnit computeReplacedLogicalWidth(
ShouldComputePreferred = ComputeActual) const override;
LayoutUnit computeReplacedLogicalHeight(
LayoutUnit estimatedUsedWidth = LayoutUnit()) const override;
void layout() override;
void paintReplaced(const PaintInfo&, const LayoutPoint&) const override;
void willBeDestroyed() override;
void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override;
bool isChildAllowed(LayoutObject*, const ComputedStyle&) const override;
void addChild(LayoutObject* child,
LayoutObject* beforeChild = nullptr) override;
void removeChild(LayoutObject*) override;
void insertedIntoTree() override;
void willBeRemovedFromTree() override;
AffineTransform localToSVGParentTransform() const override;
FloatRect objectBoundingBox() const override { return m_objectBoundingBox; }
FloatRect strokeBoundingBox() const override { return m_strokeBoundingBox; }
FloatRect visualRectInLocalSVGCoordinates() const override {
return m_visualRectInLocalSVGCoordinates;
}
bool nodeAtPoint(HitTestResult&,
const HitTestLocation& locationInContainer,
const LayoutPoint& accumulatedOffset,
HitTestAction) override;
LayoutRect localVisualRect() const override;
bool paintedOutputOfObjectHasNoEffectRegardlessOfSize() const final {
// The rule is the same as LayoutBox's instead of LayoutReplaced's.
return LayoutBox::paintedOutputOfObjectHasNoEffectRegardlessOfSize();
}
void mapLocalToAncestor(
const LayoutBoxModelObject* ancestor,
TransformState&,
MapCoordinatesFlags = ApplyContainerFlip) const override;
const LayoutObject* pushMappingToContainer(
const LayoutBoxModelObject* ancestorToStopAt,
LayoutGeometryMap&) const override;
bool canBeSelectionLeaf() const override { return false; }
bool canHaveChildren() const override { return true; }
void descendantIsolationRequirementsChanged(DescendantIsolationState) final;
void updateCachedBoundaries();
SVGTransformChange buildLocalToBorderBoxTransform();
PositionWithAffinity positionForPoint(const LayoutPoint&) final;
LayoutObjectChildList m_children;
IntSize m_containerSize;
FloatRect m_objectBoundingBox;
bool m_objectBoundingBoxValid;
FloatRect m_strokeBoundingBox;
FloatRect m_visualRectInLocalSVGCoordinates;
AffineTransform m_localToBorderBoxTransform;
bool m_isLayoutSizeChanged : 1;
bool m_didScreenScaleFactorChange : 1;
bool m_needsBoundariesOrTransformUpdate : 1;
bool m_hasBoxDecorationBackground : 1;
mutable bool m_hasNonIsolatedBlendingDescendants : 1;
mutable bool m_hasNonIsolatedBlendingDescendantsDirty : 1;
};
DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutSVGRoot, isSVGRoot());
} // namespace blink
#endif // LayoutSVGRoot_h
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