Refactor to/from/animatedType creation, to share more code between animators
[WebKit-https.git] / Source / WebCore / svg / SVGAnimatedLength.cpp
1 /*
2  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
3  *
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18  */
19
20 #include "config.h"
21
22 #if ENABLE(SVG)
23 #include "SVGAnimatedLength.h"
24
25 #include "SVGAnimateElement.h"
26 #include "SVGAnimatedNumber.h"
27
28 namespace WebCore {
29
30 SVGAnimatedLengthAnimator::SVGAnimatedLengthAnimator(SVGAnimationElement* animationElement, SVGElement* contextElement)
31     : SVGAnimatedTypeAnimator(AnimatedLength, animationElement, contextElement)
32     , m_lengthMode(SVGLength::lengthModeForAnimatedLengthAttribute(animationElement->attributeName()))
33 {
34 }
35
36 static inline SVGLength& sharedSVGLength(SVGLengthMode mode, const String& valueAsString)
37 {
38     DEFINE_STATIC_LOCAL(SVGLength, sharedLength, ());
39     ExceptionCode ec = 0;
40     sharedLength.setValueAsString(valueAsString, mode, ec);
41     ASSERT(!ec);
42     return sharedLength;
43 }
44
45 PassOwnPtr<SVGAnimatedType> SVGAnimatedLengthAnimator::constructFromString(const String& string)
46 {
47     return SVGAnimatedType::createLength(new SVGLength(m_lengthMode, string));
48 }
49
50 PassOwnPtr<SVGAnimatedType> SVGAnimatedLengthAnimator::startAnimValAnimation(const Vector<SVGAnimatedProperty*>& properties)
51 {
52     return SVGAnimatedType::createLength(constructFromBaseValue<SVGAnimatedLength>(properties));
53 }
54
55 void SVGAnimatedLengthAnimator::stopAnimValAnimation(const Vector<SVGAnimatedProperty*>& properties)
56 {
57     stopAnimValAnimationForType<SVGAnimatedLength>(properties);
58 }
59
60 void SVGAnimatedLengthAnimator::resetAnimValToBaseVal(const Vector<SVGAnimatedProperty*>& properties, SVGAnimatedType* type)
61 {
62     resetFromBaseValue<SVGAnimatedLength>(properties, type, &SVGAnimatedType::length);
63 }
64
65 void SVGAnimatedLengthAnimator::animValWillChange(const Vector<SVGAnimatedProperty*>& properties)
66 {
67     animValWillChangeForType<SVGAnimatedLength>(properties);
68 }
69
70 void SVGAnimatedLengthAnimator::animValDidChange(const Vector<SVGAnimatedProperty*>& properties)
71 {
72     animValDidChangeForType<SVGAnimatedLength>(properties);
73 }
74
75 void SVGAnimatedLengthAnimator::addAnimatedTypes(SVGAnimatedType* from, SVGAnimatedType* to)
76 {
77     ASSERT(from->type() == AnimatedLength);
78     ASSERT(from->type() == to->type());
79
80     SVGLengthContext lengthContext(m_contextElement);
81     SVGLength& fromLength = from->length();
82     SVGLength& toLength = to->length();
83
84     ExceptionCode ec = 0;
85     toLength.setValue(toLength.value(lengthContext) + fromLength.value(lengthContext), lengthContext, ec);
86     ASSERT(!ec);
87 }
88
89 static SVGLength parseLengthFromString(SVGAnimationElement* animationElement, const String& string)
90 {
91     return sharedSVGLength(SVGLength::lengthModeForAnimatedLengthAttribute(animationElement->attributeName()), string);
92 }
93
94 void SVGAnimatedLengthAnimator::calculateAnimatedValue(float percentage, unsigned repeatCount, OwnPtr<SVGAnimatedType>& from, OwnPtr<SVGAnimatedType>& to, OwnPtr<SVGAnimatedType>& animated)
95 {
96     ASSERT(m_animationElement);
97     ASSERT(m_contextElement);
98
99     SVGLength& fromSVGLength = from->length();
100     SVGLength& toSVGLength = to->length();
101     SVGLength& animatedSVGLength = animated->length();
102     m_animationElement->adjustFromToValues<SVGLength>(parseLengthFromString, fromSVGLength, toSVGLength, animatedSVGLength, percentage, m_contextElement);
103
104     SVGLengthContext lengthContext(m_contextElement);
105     float result = animatedSVGLength.value(lengthContext);
106     SVGLengthType unitType = percentage < 0.5 ? fromSVGLength.unitType() : toSVGLength.unitType();
107     SVGAnimatedNumberAnimator::calculateAnimatedNumber(m_animationElement, percentage, repeatCount, result, fromSVGLength.value(lengthContext), toSVGLength.value(lengthContext));
108
109     ExceptionCode ec = 0;
110     animatedSVGLength.setValue(lengthContext, result, m_lengthMode, unitType, ec);
111     ASSERT(!ec);
112 }
113
114 float SVGAnimatedLengthAnimator::calculateDistance(const String& fromString, const String& toString)
115 {
116     ASSERT(m_animationElement);
117     ASSERT(m_contextElement);
118     SVGAnimateElement* animationElement = static_cast<SVGAnimateElement*>(m_animationElement);    
119     SVGLengthMode lengthMode = SVGLength::lengthModeForAnimatedLengthAttribute(animationElement->attributeName());
120     SVGLength from = SVGLength(lengthMode, fromString);
121     SVGLength to = SVGLength(lengthMode, toString);
122     SVGLengthContext lengthContext(m_contextElement);
123     return fabsf(to.value(lengthContext) - from.value(lengthContext));
124 }
125
126 }
127
128 #endif // ENABLE(SVG)