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      1 /*
      2  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann (at) kde.org>
      3  * Copyright (C) 2004, 2005, 2007 Rob Buis <buis (at) 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/platform/graphics/FloatRect.h"
     27 #include "core/rendering/RenderReplaced.h"
     28 #include "core/rendering/svg/SVGRenderSupport.h"
     29 
     30 namespace WebCore {
     31 
     32 class AffineTransform;
     33 class SVGElement;
     34 
     35 class RenderSVGRoot FINAL : public RenderReplaced {
     36 public:
     37     explicit RenderSVGRoot(SVGElement*);
     38     virtual ~RenderSVGRoot();
     39 
     40     bool isEmbeddedThroughSVGImage() const;
     41     bool isEmbeddedThroughFrameContainingSVGDocument() const;
     42 
     43     virtual void computeIntrinsicRatioInformation(FloatSize& intrinsicSize, double& intrinsicRatio, bool& isPercentageIntrinsicSize) const;
     44 
     45     RenderObject* firstChild() const { ASSERT(children() == virtualChildren()); return children()->firstChild(); }
     46     RenderObject* lastChild() const { ASSERT(children() == virtualChildren()); return children()->lastChild(); }
     47 
     48     const RenderObjectChildList* children() const { return &m_children; }
     49     RenderObjectChildList* children() { return &m_children; }
     50 
     51     bool isLayoutSizeChanged() const { return m_isLayoutSizeChanged; }
     52     virtual void setNeedsBoundariesUpdate() { m_needsBoundariesOrTransformUpdate = true; }
     53     virtual bool needsBoundariesUpdate() OVERRIDE { return m_needsBoundariesOrTransformUpdate; }
     54     virtual void setNeedsTransformUpdate() { m_needsBoundariesOrTransformUpdate = true; }
     55 
     56     IntSize containerSize() const { return m_containerSize; }
     57     void setContainerSize(const IntSize& containerSize) { m_containerSize = containerSize; }
     58 
     59     virtual bool hasRelativeDimensions() const OVERRIDE;
     60     virtual bool hasRelativeIntrinsicLogicalWidth() const OVERRIDE;
     61     virtual bool hasRelativeLogicalHeight() const OVERRIDE;
     62 
     63     // localToBorderBoxTransform maps local SVG viewport coordinates to local CSS box coordinates.
     64     const AffineTransform& localToBorderBoxTransform() const { return m_localToBorderBoxTransform; }
     65 
     66     // The flag is cleared at the beginning of each layout() pass. Elements then call this
     67     // method during layout when they are invalidated by a filter.
     68     static void addResourceForClientInvalidation(RenderSVGResourceContainer*);
     69 
     70 private:
     71     virtual RenderObjectChildList* virtualChildren() { return children(); }
     72     virtual const RenderObjectChildList* virtualChildren() const { return children(); }
     73 
     74     virtual bool isSVGRoot() const { return true; }
     75     virtual const char* renderName() const { return "RenderSVGRoot"; }
     76 
     77     virtual LayoutUnit computeReplacedLogicalWidth(ShouldComputePreferred  = ComputeActual) const OVERRIDE;
     78     virtual LayoutUnit computeReplacedLogicalHeight() const;
     79     virtual void layout();
     80     virtual void paintReplaced(PaintInfo&, const LayoutPoint&);
     81 
     82     virtual void willBeDestroyed();
     83     virtual void styleWillChange(StyleDifference, const RenderStyle* newStyle);
     84     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
     85     virtual void addChild(RenderObject* child, RenderObject* beforeChild = 0) OVERRIDE;
     86     virtual void removeChild(RenderObject*) OVERRIDE;
     87 
     88     virtual const AffineTransform& localToParentTransform() const;
     89 
     90     bool fillContains(const FloatPoint&) const;
     91     bool strokeContains(const FloatPoint&) const;
     92 
     93     virtual FloatRect objectBoundingBox() const { return m_objectBoundingBox; }
     94     virtual FloatRect strokeBoundingBox() const { return m_strokeBoundingBox; }
     95     virtual FloatRect repaintRectInLocalCoordinates() const { return m_repaintBoundingBox; }
     96 
     97     virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) OVERRIDE;
     98 
     99     virtual LayoutRect clippedOverflowRectForRepaint(const RenderLayerModelObject* repaintContainer) const OVERRIDE;
    100     virtual void computeFloatRectForRepaint(const RenderLayerModelObject* repaintContainer, FloatRect& repaintRect, bool fixed) const OVERRIDE;
    101 
    102     virtual void mapLocalToContainer(const RenderLayerModelObject* repaintContainer, TransformState&, MapCoordinatesFlags = ApplyContainerFlip, bool* wasFixed = 0) const OVERRIDE;
    103     virtual const RenderObject* pushMappingToContainer(const RenderLayerModelObject* ancestorToStopAt, RenderGeometryMap&) const OVERRIDE;
    104 
    105     virtual bool canBeSelectionLeaf() const { return false; }
    106     virtual bool canHaveChildren() const { return true; }
    107 
    108     void updateCachedBoundaries();
    109     void buildLocalToBorderBoxTransform();
    110 
    111     RenderObjectChildList m_children;
    112     IntSize m_containerSize;
    113     FloatRect m_objectBoundingBox;
    114     bool m_objectBoundingBoxValid;
    115     FloatRect m_strokeBoundingBox;
    116     FloatRect m_repaintBoundingBox;
    117     mutable AffineTransform m_localToParentTransform;
    118     AffineTransform m_localToBorderBoxTransform;
    119     HashSet<RenderSVGResourceContainer*> m_resourcesNeedingToInvalidateClients;
    120     bool m_isLayoutSizeChanged : 1;
    121     bool m_needsBoundariesOrTransformUpdate : 1;
    122 };
    123 
    124 inline RenderSVGRoot* toRenderSVGRoot(RenderObject* object)
    125 {
    126     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isSVGRoot());
    127     return static_cast<RenderSVGRoot*>(object);
    128 }
    129 
    130 inline const RenderSVGRoot* toRenderSVGRoot(const RenderObject* object)
    131 {
    132     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isSVGRoot());
    133     return static_cast<const RenderSVGRoot*>(object);
    134 }
    135 
    136 // This will catch anyone doing an unnecessary cast.
    137 void toRenderSVGRoot(const RenderSVGRoot*);
    138 
    139 } // namespace WebCore
    140 
    141 #endif // RenderSVGRoot_h
    142