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      1 /*
      2  * Copyright (C) 2013 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 SVGProperty_h
     32 #define SVGProperty_h
     33 
     34 #include "core/svg/properties/SVGPropertyInfo.h"
     35 #include "platform/heap/Handle.h"
     36 #include "wtf/Noncopyable.h"
     37 #include "wtf/PassRefPtr.h"
     38 #include "wtf/RefCounted.h"
     39 #include "wtf/text/WTFString.h"
     40 
     41 namespace blink {
     42 
     43 class SVGElement;
     44 class SVGAnimationElement;
     45 
     46 class SVGPropertyBase : public RefCountedWillBeRefCountedGarbageCollected<SVGPropertyBase> {
     47     WTF_MAKE_NONCOPYABLE(SVGPropertyBase);
     48 
     49 public:
     50     // Properties do not have a primitive type by default
     51     typedef void PrimitiveType;
     52 
     53     virtual ~SVGPropertyBase()
     54     {
     55         ASSERT(!m_ownerList);
     56     }
     57 
     58     // FIXME: remove this in WebAnimations transition.
     59     // This is used from SVGAnimatedNewPropertyAnimator for its animate-by-string implementation.
     60     virtual PassRefPtr<SVGPropertyBase> cloneForAnimation(const String&) const = 0;
     61 
     62     virtual String valueAsString() const = 0;
     63 
     64     // FIXME: remove below and just have this inherit AnimatableValue in WebAnimations transition.
     65     virtual void add(PassRefPtrWillBeRawPtr<SVGPropertyBase>, SVGElement*) = 0;
     66     virtual void calculateAnimatedValue(SVGAnimationElement*, float percentage, unsigned repeatCount, PassRefPtr<SVGPropertyBase> from, PassRefPtr<SVGPropertyBase> to, PassRefPtr<SVGPropertyBase> toAtEndOfDurationValue, SVGElement*) = 0;
     67     virtual float calculateDistance(PassRefPtr<SVGPropertyBase> to, SVGElement*) = 0;
     68 
     69     AnimatedPropertyType type()
     70     {
     71         return m_type;
     72     }
     73 
     74     SVGPropertyBase* ownerList() const
     75     {
     76         return m_ownerList;
     77     }
     78 
     79     void setOwnerList(SVGPropertyBase* ownerList)
     80     {
     81         // Previous owner list must be cleared before setting new owner list.
     82         ASSERT((!ownerList && m_ownerList) || (ownerList && !m_ownerList));
     83 
     84         m_ownerList = ownerList;
     85     }
     86 
     87     virtual void trace(Visitor* visitor)
     88     {
     89         visitor->trace(m_ownerList);
     90     }
     91 
     92 protected:
     93     explicit SVGPropertyBase(AnimatedPropertyType type)
     94         : m_type(type)
     95         , m_ownerList(nullptr)
     96     {
     97     }
     98 
     99 private:
    100     const AnimatedPropertyType m_type;
    101 
    102     RawPtrWillBeMember<SVGPropertyBase> m_ownerList;
    103 };
    104 
    105 }
    106 
    107 #endif // SVGProperty_h
    108