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      1 /*
      2  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
      3  *
      4  * This library is free software; you can redistribute it and/or
      5  * modify it under the terms of the GNU Library General Public
      6  * License as published by the Free Software Foundation; either
      7  * version 2 of the License, or (at your option) any later version.
      8  *
      9  * This library is distributed in the hope that it will be useful,
     10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  * Library General Public License for more details.
     13  *
     14  * You should have received a copy of the GNU Library General Public License
     15  * along with this library; see the file COPYING.LIB.  If not, write to
     16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     17  * Boston, MA 02110-1301, USA.
     18  */
     19 
     20 #ifndef SVGStaticPropertyTearOff_h
     21 #define SVGStaticPropertyTearOff_h
     22 
     23 #if ENABLE(SVG)
     24 #include "SVGPropertyTearOff.h"
     25 
     26 namespace WebCore {
     27 
     28 #if COMPILER(MSVC)
     29 // UpdateMethod is 12 bytes. We have to pack to a size greater than or equal to that to avoid an
     30 // alignment warning (C4121). 16 is the next-largest size allowed for packing, so we use that.
     31 #pragma pack(push, 16)
     32 #endif
     33 template<typename ContextElement, typename PropertyType>
     34 class SVGStaticPropertyTearOff : public SVGPropertyTearOff<PropertyType> {
     35 public:
     36     typedef SVGStaticPropertyTearOff<ContextElement, PropertyType> Self;
     37     typedef void (ContextElement::*UpdateMethod)();
     38 
     39     // Used for non-animated POD types that are not associated with a SVGAnimatedProperty object, nor with a XML DOM attribute
     40     // (for example: SVGSVGElement::currentTranslate).
     41     static PassRefPtr<Self> create(ContextElement* contextElement, PropertyType& value, UpdateMethod update)
     42     {
     43         ASSERT(contextElement);
     44         return adoptRef(new Self(contextElement, value, update));
     45     }
     46 
     47     virtual void commitChange() { (m_contextElement.get()->*m_update)(); }
     48 
     49 private:
     50     SVGStaticPropertyTearOff(ContextElement* contextElement, PropertyType& value, UpdateMethod update)
     51         : SVGPropertyTearOff<PropertyType>(0, UndefinedRole, value)
     52         , m_update(update)
     53         , m_contextElement(contextElement)
     54     {
     55     }
     56 
     57     UpdateMethod m_update;
     58     RefPtr<ContextElement> m_contextElement;
     59 };
     60 #if COMPILER(MSVC)
     61 #pragma pack(pop)
     62 #endif
     63 
     64 }
     65 
     66 #endif // ENABLE(SVG)
     67 #endif // SVGStaticPropertyTearOff_h
     68