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      1 /*
      2  * Copyright (c) 2009, Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef RenderSVGModelObject_h
     32 #define RenderSVGModelObject_h
     33 
     34 #include "core/rendering/RenderObject.h"
     35 #include "core/svg/SVGElement.h"
     36 #include "platform/geometry/FloatRect.h"
     37 
     38 namespace blink {
     39 
     40 // Most renderers in the SVG rendering tree will inherit from this class
     41 // but not all. (e.g. RenderSVGForeignObject, RenderSVGBlock) thus methods
     42 // required by SVG renders need to be declared on RenderObject, but shared
     43 // logic can go in this class or in SVGRenderSupport.
     44 
     45 class SVGElement;
     46 
     47 class RenderSVGModelObject : public RenderObject {
     48 public:
     49     explicit RenderSVGModelObject(SVGElement*);
     50 
     51     virtual bool isChildAllowed(RenderObject*, RenderStyle*) const OVERRIDE;
     52     virtual bool canHaveWhitespaceChildren() const OVERRIDE { return false; }
     53 
     54     virtual LayoutRect clippedOverflowRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer, const PaintInvalidationState* = 0) const OVERRIDE;
     55     virtual void computeFloatRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer, FloatRect&, const PaintInvalidationState*) const OVERRIDE FINAL;
     56 
     57     virtual void absoluteRects(Vector<IntRect>&, const LayoutPoint& accumulatedOffset) const OVERRIDE FINAL;
     58     virtual void absoluteQuads(Vector<FloatQuad>&, bool* wasFixed) const OVERRIDE;
     59 
     60     virtual void mapLocalToContainer(const RenderLayerModelObject* paintInvalidationContainer, TransformState&, MapCoordinatesFlags = ApplyContainerFlip, bool* wasFixed = 0, const PaintInvalidationState* = 0) const OVERRIDE FINAL;
     61     virtual const RenderObject* pushMappingToContainer(const RenderLayerModelObject* ancestorToStopAt, RenderGeometryMap&) const OVERRIDE FINAL;
     62     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE;
     63 
     64     virtual void computeLayerHitTestRects(LayerHitTestRects&) const OVERRIDE FINAL;
     65 
     66     SVGElement* element() const { return toSVGElement(RenderObject::node()); }
     67 
     68     virtual bool isSVG() const OVERRIDE FINAL { return true; }
     69 
     70 protected:
     71     virtual void addLayerHitTestRects(LayerHitTestRects&, const RenderLayer* currentCompositedLayer, const LayoutPoint& layerOffset, const LayoutRect& containerRect) const OVERRIDE FINAL;
     72     virtual void willBeDestroyed() OVERRIDE;
     73 
     74 private:
     75     // RenderSVGModelObject subclasses should use element() instead.
     76     void node() const WTF_DELETED_FUNCTION;
     77 
     78     // This method should never be called, SVG uses a different nodeAtPoint method
     79     virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) OVERRIDE FINAL;
     80     virtual IntRect absoluteFocusRingBoundingBoxRect() const OVERRIDE FINAL;
     81 
     82     InvalidationReason invalidatePaintIfNeeded(const PaintInvalidationState&, const RenderLayerModelObject& paintInvalidationContainer) OVERRIDE FINAL;
     83 };
     84 
     85 }
     86 
     87 #endif
     88