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      1 /*
      2  * Copyright (C) 2006 Apple Computer, Inc.
      3  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann (at) kde.org>
      4  * Copyright (C) Research In Motion Limited 2010-2012. All rights reserved.
      5  *
      6  * This library is free software; you can redistribute it and/or
      7  * modify it under the terms of the GNU Library General Public
      8  * License as published by the Free Software Foundation; either
      9  * version 2 of the License, or (at your option) any later version.
     10  *
     11  * This library is distributed in the hope that it will be useful,
     12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14  * Library General Public License for more details.
     15  *
     16  * You should have received a copy of the GNU Library General Public License
     17  * along with this library; see the file COPYING.LIB.  If not, write to
     18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     19  * Boston, MA 02110-1301, USA.
     20  */
     21 
     22 #ifndef RenderSVGText_h
     23 #define RenderSVGText_h
     24 
     25 #include "core/rendering/svg/RenderSVGBlock.h"
     26 #include "core/rendering/svg/SVGTextLayoutAttributesBuilder.h"
     27 #include "platform/transforms/AffineTransform.h"
     28 
     29 namespace WebCore {
     30 
     31 class RenderSVGInlineText;
     32 class SVGTextElement;
     33 class RenderSVGInlineText;
     34 
     35 class RenderSVGText FINAL : public RenderSVGBlock {
     36 public:
     37     explicit RenderSVGText(SVGTextElement*);
     38     virtual ~RenderSVGText();
     39 
     40     virtual bool isChildAllowed(RenderObject*, RenderStyle*) const OVERRIDE;
     41 
     42     void setNeedsPositioningValuesUpdate() { m_needsPositioningValuesUpdate = true; }
     43     virtual void setNeedsTransformUpdate() OVERRIDE { m_needsTransformUpdate = true; }
     44     void setNeedsTextMetricsUpdate() { m_needsTextMetricsUpdate = true; }
     45     virtual FloatRect paintInvalidationRectInLocalCoordinates() const OVERRIDE;
     46 
     47     static RenderSVGText* locateRenderSVGTextAncestor(RenderObject*);
     48     static const RenderSVGText* locateRenderSVGTextAncestor(const RenderObject*);
     49 
     50     bool needsReordering() const { return m_needsReordering; }
     51     Vector<SVGTextLayoutAttributes*>& layoutAttributes() { return m_layoutAttributes; }
     52 
     53     void subtreeChildWasAdded(RenderObject*);
     54     void subtreeChildWillBeRemoved(RenderObject*, Vector<SVGTextLayoutAttributes*, 2>& affectedAttributes);
     55     void subtreeChildWasRemoved(const Vector<SVGTextLayoutAttributes*, 2>& affectedAttributes);
     56     void subtreeStyleDidChange();
     57     void subtreeTextDidChange(RenderSVGInlineText*);
     58 
     59 private:
     60     virtual const char* renderName() const OVERRIDE { return "RenderSVGText"; }
     61     virtual bool isSVGText() const OVERRIDE { return true; }
     62 
     63     virtual void paint(PaintInfo&, const LayoutPoint&) OVERRIDE;
     64     virtual bool nodeAtFloatPoint(const HitTestRequest&, HitTestResult&, const FloatPoint& pointInParent, HitTestAction) OVERRIDE;
     65     virtual PositionWithAffinity positionForPoint(const LayoutPoint&) OVERRIDE;
     66 
     67     virtual void layout() OVERRIDE;
     68 
     69     virtual void absoluteQuads(Vector<FloatQuad>&, bool* wasFixed) const OVERRIDE;
     70 
     71     virtual void mapRectToPaintInvalidationBacking(const RenderLayerModelObject* paintInvalidationContainer, LayoutRect&, bool fixed = false) const OVERRIDE;
     72 
     73     virtual void addChild(RenderObject* child, RenderObject* beforeChild = 0) OVERRIDE;
     74     virtual void removeChild(RenderObject*) OVERRIDE;
     75     virtual void willBeDestroyed() OVERRIDE;
     76 
     77     virtual FloatRect objectBoundingBox() const OVERRIDE { return frameRect(); }
     78     virtual FloatRect strokeBoundingBox() const OVERRIDE;
     79 
     80     virtual const AffineTransform& localToParentTransform() const OVERRIDE { return m_localTransform; }
     81     virtual RootInlineBox* createRootInlineBox() OVERRIDE;
     82 
     83     virtual RenderBlock* firstLineBlock() const OVERRIDE;
     84     virtual void updateFirstLetter() OVERRIDE;
     85 
     86     bool shouldHandleSubtreeMutations() const;
     87 
     88     bool m_needsReordering : 1;
     89     bool m_needsPositioningValuesUpdate : 1;
     90     bool m_needsTransformUpdate : 1;
     91     bool m_needsTextMetricsUpdate : 1;
     92     SVGTextLayoutAttributesBuilder m_layoutAttributesBuilder;
     93     Vector<SVGTextLayoutAttributes*> m_layoutAttributes;
     94 };
     95 
     96 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderSVGText, isSVGText());
     97 
     98 }
     99 
    100 #endif
    101