1/*
2 * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2004, 2005, 2007 Rob Buis <buis@kde.org>
4 * Copyright (C) 2009 Google, Inc.  All rights reserved.
5 * Copyright (C) 2009 Apple Inc. All rights reserved.
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * Library General Public License for more details.
16 *
17 * You should have received a copy of the GNU Library General Public License
18 * along with this library; see the file COPYING.LIB.  If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
21 */
22
23#ifndef RenderSVGRoot_h
24#define RenderSVGRoot_h
25
26#include "core/rendering/RenderReplaced.h"
27#include "platform/geometry/FloatRect.h"
28
29namespace blink {
30
31class SVGElement;
32
33class RenderSVGRoot FINAL : public RenderReplaced {
34public:
35    explicit RenderSVGRoot(SVGElement*);
36    virtual ~RenderSVGRoot();
37    virtual void trace(Visitor*) OVERRIDE;
38
39    bool isEmbeddedThroughSVGImage() const;
40    bool isEmbeddedThroughFrameContainingSVGDocument() const;
41
42    virtual void computeIntrinsicRatioInformation(FloatSize& intrinsicSize, double& intrinsicRatio) const OVERRIDE;
43
44    RenderObject* firstChild() const { ASSERT(children() == virtualChildren()); return children()->firstChild(); }
45    RenderObject* lastChild() const { ASSERT(children() == virtualChildren()); return children()->lastChild(); }
46
47    // If you have a RenderSVGRoot, use firstChild or lastChild instead.
48    void slowFirstChild() const WTF_DELETED_FUNCTION;
49    void slowLastChild() const WTF_DELETED_FUNCTION;
50
51    const RenderObjectChildList* children() const { return &m_children; }
52    RenderObjectChildList* children() { return &m_children; }
53
54    bool isLayoutSizeChanged() const { return m_isLayoutSizeChanged; }
55    virtual void setNeedsBoundariesUpdate() OVERRIDE { m_needsBoundariesOrTransformUpdate = true; }
56    virtual void setNeedsTransformUpdate() OVERRIDE { m_needsBoundariesOrTransformUpdate = true; }
57
58    IntSize containerSize() const { return m_containerSize; }
59    void setContainerSize(const IntSize& containerSize)
60    {
61        // SVGImage::draw() does a view layout prior to painting,
62        // and we need that layout to know of the new size otherwise
63        // the rendering may be incorrectly using the old size.
64        if (m_containerSize != containerSize)
65            setNeedsLayoutAndFullPaintInvalidation();
66        m_containerSize = containerSize;
67    }
68
69    // localToBorderBoxTransform maps local SVG viewport coordinates to local CSS box coordinates.
70    const AffineTransform& localToBorderBoxTransform() const { return m_localToBorderBoxTransform; }
71
72private:
73    virtual RenderObjectChildList* virtualChildren() OVERRIDE { return children(); }
74    virtual const RenderObjectChildList* virtualChildren() const OVERRIDE { return children(); }
75
76    virtual const char* renderName() const OVERRIDE { return "RenderSVGRoot"; }
77    virtual bool isSVGRoot() const OVERRIDE { return true; }
78    virtual bool isSVG() const OVERRIDE { return true; }
79
80    virtual LayoutUnit computeReplacedLogicalWidth(ShouldComputePreferred  = ComputeActual) const OVERRIDE;
81    virtual LayoutUnit computeReplacedLogicalHeight() const OVERRIDE;
82    virtual void layout() OVERRIDE;
83    virtual void paintReplaced(PaintInfo&, const LayoutPoint&) OVERRIDE;
84
85    virtual void willBeDestroyed() OVERRIDE;
86    virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE;
87    virtual bool isChildAllowed(RenderObject*, RenderStyle*) const OVERRIDE;
88    virtual void addChild(RenderObject* child, RenderObject* beforeChild = 0) OVERRIDE;
89    virtual void removeChild(RenderObject*) OVERRIDE;
90    virtual bool canHaveWhitespaceChildren() const OVERRIDE { return false; }
91
92    virtual void insertedIntoTree() OVERRIDE;
93    virtual void willBeRemovedFromTree() OVERRIDE;
94
95    virtual const AffineTransform& localToParentTransform() const OVERRIDE;
96
97    virtual FloatRect objectBoundingBox() const OVERRIDE { return m_objectBoundingBox; }
98    virtual FloatRect strokeBoundingBox() const OVERRIDE { return m_strokeBoundingBox; }
99    virtual FloatRect paintInvalidationRectInLocalCoordinates() const OVERRIDE { return m_paintInvalidationBoundingBox; }
100
101    virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) OVERRIDE;
102
103    virtual LayoutRect clippedOverflowRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer, const PaintInvalidationState* = 0) const OVERRIDE;
104    virtual void computeFloatRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer, FloatRect& paintInvalidationRect, const PaintInvalidationState* = 0) const OVERRIDE;
105
106    virtual void mapLocalToContainer(const RenderLayerModelObject* paintInvalidationContainer, TransformState&, MapCoordinatesFlags = ApplyContainerFlip, bool* wasFixed = 0, const PaintInvalidationState* = 0) const OVERRIDE;
107    virtual const RenderObject* pushMappingToContainer(const RenderLayerModelObject* ancestorToStopAt, RenderGeometryMap&) const OVERRIDE;
108
109    virtual bool canBeSelectionLeaf() const OVERRIDE { return false; }
110    virtual bool canHaveChildren() const OVERRIDE { return true; }
111
112    bool shouldApplyViewportClip() const;
113    void updateCachedBoundaries();
114    void buildLocalToBorderBoxTransform();
115
116    RenderObjectChildList m_children;
117    IntSize m_containerSize;
118    FloatRect m_objectBoundingBox;
119    bool m_objectBoundingBoxValid;
120    FloatRect m_strokeBoundingBox;
121    FloatRect m_paintInvalidationBoundingBox;
122    mutable AffineTransform m_localToParentTransform;
123    AffineTransform m_localToBorderBoxTransform;
124    bool m_isLayoutSizeChanged : 1;
125    bool m_needsBoundariesOrTransformUpdate : 1;
126    bool m_hasBoxDecorationBackground : 1;
127};
128
129DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderSVGRoot, isSVGRoot());
130
131} // namespace blink
132
133#endif // RenderSVGRoot_h
134