Support currentScale for embedded SVG

third_party/WebKit/Source/core/svg/SVGSVGElement.h

 /*
  * Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Rob Buis <buis@kde.org>
  * Copyright (C) 2014 Google, Inc.
  *
  * 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.
  *
@@ skipping 47 matching lines @@
     PassRefPtrWillBeRawPtr<SVGRectTearOff> viewport() const;
 
     bool useCurrentView() const { return m_useCurrentView; }
     SVGViewSpec* currentView();
 
     float intrinsicWidth() const;
     float intrinsicHeight() const;
     FloatSize currentViewportSize() const;
     FloatRect currentViewBoxRect() const;
 
-    float currentScale() const;
+    float currentScale() const { return m_currentScale; }

[fs, 2016/03/31 10:53:04]

Here we rely on the setter gating access and hence not allowing modifications if
this is not an outermost root. If the element is reparented though that will no
longer hold. I.e see:

https://svgwg.org/svg2-draft/struct.html#__svg__SVGSVGElement__currentScale

for the semantics of this property.

[Shanmuga Pandi, 2016/03/31 11:53:35]

Right!! Thanks for pointing out. Done

     void setCurrentScale(float scale);
 
     FloatPoint currentTranslate() { return m_translation->value(); }
     void setCurrentTranslate(const FloatPoint&);
     PassRefPtrWillBeRawPtr<SVGPointTearOff> currentTranslateFromJavascript();
 
     SMILTimeContainer* timeContainer() const { return m_timeContainer.get(); }
 
     void pauseAnimations();
     void unpauseAnimations();
@@ skipping 75 matching lines @@
     RefPtrWillBeMember<SVGAnimatedLength> m_y;
     RefPtrWillBeMember<SVGAnimatedLength> m_width;
     RefPtrWillBeMember<SVGAnimatedLength> m_height;
 
     AffineTransform localCoordinateSpaceTransform(SVGElement::CTMScope) const override;
 
     bool m_useCurrentView;
     RefPtrWillBeMember<SMILTimeContainer> m_timeContainer;
     RefPtrWillBeMember<SVGPoint> m_translation;
     RefPtrWillBeMember<SVGViewSpec> m_viewSpec;
+    float m_currentScale;
 
     friend class SVGCurrentTranslateTearOff;
 };
 
 } // namespace blink
 
 #endif // SVGSVGElement_h