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

   1 /*
   2  * Copyright (C) 2007 Rob Buis <buis@kde.org>
   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 SVGViewSpec_h
  21 #define SVGViewSpec_h
  22
  23 #include "bindings/core/v8/ScriptWrappable.h"
  24 #include "core/svg/SVGFitToViewBox.h"
  25 #include "core/svg/SVGSVGElement.h"
  26 #include "core/svg/SVGZoomAndPan.h"
  27 #include "platform/heap/Handle.h"
  28
  29 namespace blink {
  30
  31 class SVGViewSpec final : public RefCountedWillBeGarbageCollectedFinalized<SVGViewSpec>, public ScriptWrappable, public SVGZoomAndPan, public SVGFitToViewBox {
  32     DEFINE_WRAPPERTYPEINFO();
  33     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(SVGViewSpec);
  34 public:
  35 #if !ENABLE(OILPAN)
  36     using RefCounted<SVGViewSpec>::ref;
  37     using RefCounted<SVGViewSpec>::deref;
  38 #endif
  39
  40     static PassRefPtrWillBeRawPtr<SVGViewSpec> create(SVGSVGElement* contextElement)
  41     {
  42         return adoptRefWillBeNoop(new SVGViewSpec(contextElement));
  43     }
  44
  45     bool parseViewSpec(const String&);
  46     void reset();
  47     void detachContextElement();
  48     template<typename T> void inheritViewAttributesFromElement(T*);
  49
  50     // JS API
  51     SVGTransformList* transform() { return m_transform ? m_transform->baseValue() : 0; }
  52     PassRefPtrWillBeRawPtr<SVGTransformListTearOff> transformFromJavascript() { return m_transform ? m_transform->baseVal() : 0; }
  53     SVGElement* viewTarget() const;
  54     String viewBoxString() const;
  55     String preserveAspectRatioString() const;
  56     String transformString() const;
  57     String viewTargetString() const { return m_viewTargetString; }
  58     // override SVGZoomAndPan.setZoomAndPan so can throw exception on write
  59     void setZoomAndPan(unsigned short value) { } // read only
  60     void setZoomAndPan(unsigned short value, ExceptionState&);
  61
  62     DECLARE_VIRTUAL_TRACE();
  63
  64     SVGSVGElement* contextElement() { return m_contextElement.get(); }
  65
  66 private:
  67     explicit SVGViewSpec(SVGSVGElement*);
  68
  69     template<typename CharType>
  70     bool parseViewSpecInternal(const CharType* ptr, const CharType* end);
  71
  72     RawPtrWillBeMember<SVGSVGElement> m_contextElement;
  73     RefPtrWillBeMember<SVGAnimatedTransformList> m_transform;
  74     String m_viewTargetString;
  75 };
  76
  77 template <typename T>
  78 void SVGViewSpec::inheritViewAttributesFromElement(T* inheritFromElement)
  79 {
  80     if (!inheritFromElement->hasEmptyViewBox())
  81         viewBox()->baseValue()->setValue(inheritFromElement->viewBox()->currentValue()->value());
  82
  83     if (inheritFromElement->preserveAspectRatio()->isSpecified()) {
  84         preserveAspectRatio()->baseValue()->setAlign(inheritFromElement->preserveAspectRatio()->currentValue()->align());
  85         preserveAspectRatio()->baseValue()->setMeetOrSlice(inheritFromElement->preserveAspectRatio()->currentValue()->meetOrSlice());
  86     }
  87
  88     if (inheritFromElement->hasAttribute(SVGNames::zoomAndPanAttr))
  89         setZoomAndPan(inheritFromElement->zoomAndPan());
  90 }
  91
  92 } // namespace blink
  93
  94 #endif // SVGViewSpec_h