code.vuplus.com Git - vuplus_webkit/blob - Source/WebCore/svg/SVGAnimatedLength.cpp

   1 /*
   2  * Copyright (C) Research In Motion Limited 2011. 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 #include "config.h"
  21
  22 #if ENABLE(SVG) && ENABLE(SVG_ANIMATION)
  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 void SVGAnimatedLengthAnimator::calculateFromAndToValues(OwnPtr<SVGAnimatedType>& from, OwnPtr<SVGAnimatedType>& to, const String& fromString, const String& toString)
  51 {
  52     ASSERT(m_contextElement);
  53     ASSERT(m_animationElement);
  54     SVGAnimateElement* animationElement = static_cast<SVGAnimateElement*>(m_animationElement);
  55     animationElement->determinePropertyValueTypes(fromString, toString);
  56
  57     from = constructFromString(fromString);
  58     to = constructFromString(toString);
  59 }
  60
  61 void SVGAnimatedLengthAnimator::calculateFromAndByValues(OwnPtr<SVGAnimatedType>& from, OwnPtr<SVGAnimatedType>& to, const String& fromString, const String& byString)
  62 {
  63     ASSERT(m_contextElement);
  64     ASSERT(m_animationElement);
  65     SVGAnimateElement* animationElement = static_cast<SVGAnimateElement*>(m_animationElement);
  66     animationElement->determinePropertyValueTypes(fromString, byString);
  67
  68     from = constructFromString(fromString);
  69     to = constructFromString(byString);
  70
  71     SVGLength& fromLength = from->length();
  72     SVGLength& toLength = to->length();
  73     ExceptionCode ec = 0;
  74     toLength.setValue(toLength.value(m_contextElement) + fromLength.value(m_contextElement), m_contextElement, ec);
  75     ASSERT(!ec);
  76 }
  77
  78 void SVGAnimatedLengthAnimator::calculateAnimatedValue(float percentage, unsigned repeatCount,
  79                                                        OwnPtr<SVGAnimatedType>& from, OwnPtr<SVGAnimatedType>& to, OwnPtr<SVGAnimatedType>& animated)
  80 {
  81     ASSERT(m_animationElement);
  82     ASSERT(m_contextElement);
  83
  84     SVGAnimateElement* animationElement = static_cast<SVGAnimateElement*>(m_animationElement);
  85     AnimationMode animationMode = animationElement->animationMode();
  86
  87     // To animation uses contributions from the lower priority animations as the base value.
  88     SVGLength& animatedSVGLength = animated->length();
  89     SVGLength& fromSVGLength = from->length();
  90     if (animationMode == ToAnimation)
  91         fromSVGLength = animatedSVGLength;
  92
  93     // Replace 'inherit' by their computed property values.
  94     SVGLength& toSVGLength = to->length();
  95     if (animationElement->fromPropertyValueType() == InheritValue) {
  96         String fromLengthString;
  97         animationElement->adjustForInheritance(m_contextElement, animationElement->attributeName(), fromLengthString);
  98         fromSVGLength = sharedSVGLength(m_lengthMode, fromLengthString);
  99     }
 100     if (animationElement->toPropertyValueType() == InheritValue) {
 101         String toLengthString;
 102         animationElement->adjustForInheritance(m_contextElement, animationElement->attributeName(), toLengthString);
 103         toSVGLength = sharedSVGLength(m_lengthMode, toLengthString);
 104     }
 105
 106     float result = animatedSVGLength.value(m_contextElement);
 107     SVGLengthType unitType = percentage < 0.5 ? fromSVGLength.unitType() : toSVGLength.unitType();
 108     SVGAnimatedNumberAnimator::calculateAnimatedNumber(animationElement, percentage, repeatCount, result, fromSVGLength.value(m_contextElement), toSVGLength.value(m_contextElement));
 109
 110     ExceptionCode ec = 0;
 111     animatedSVGLength.setValue(m_contextElement, result, m_lengthMode, unitType, ec);
 112     ASSERT(!ec);
 113 }
 114
 115 float SVGAnimatedLengthAnimator::calculateDistance(const String& fromString, const String& toString)
 116 {
 117     ASSERT(m_animationElement);
 118     ASSERT(m_contextElement);
 119     SVGAnimateElement* animationElement = static_cast<SVGAnimateElement*>(m_animationElement);
 120     SVGLengthMode lengthMode = SVGLength::lengthModeForAnimatedLengthAttribute(animationElement->attributeName());
 121     SVGLength from = SVGLength(lengthMode, fromString);
 122     SVGLength to = SVGLength(lengthMode, toString);
 123     return fabsf(to.value(m_contextElement) - from.value(m_contextElement));
 124 }
 125
 126 }
 127
 128 #endif // ENABLE(SVG) && ENABLE(SVG_ANIMATION)