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SVGAnimationElement.h

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00001 /*
00002     Copyright (C) 2004, 2005 Nikolas Zimmermann <wildfox@kde.org>
00003                   2004, 2005, 2006 Rob Buis <buis@kde.org>
00004     Copyright (C) 2007 Eric Seidel <eric@webkit.org>
00005     Copyright (C) 2008 Apple Inc. All rights reserved.
00006 
00007     This file is part of the KDE project
00008 
00009     This library is free software; you can redistribute it and/or
00010     modify it under the terms of the GNU Library General Public
00011     License as published by the Free Software Foundation; either
00012     version 2 of the License, or (at your option) any later version.
00013 
00014     This library is distributed in the hope that it will be useful,
00015     but WITHOUT ANY WARRANTY; without even the implied warranty of
00016     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017     Library General Public License for more details.
00018 
00019     You should have received a copy of the GNU Library General Public License
00020     along with this library; see the file COPYING.LIB.  If not, write to
00021     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00022     Boston, MA 02110-1301, USA.
00023 */
00024 
00025 #ifndef SVGAnimationElement_h
00026 #define SVGAnimationElement_h
00027 #if ENABLE(SVG_ANIMATION)
00028 
00029 #include "ElementTimeControl.h"
00030 #include "Path.h"
00031 #include "SMILTime.h"
00032 #include "SVGSMILElement.h"
00033 #include "SVGExternalResourcesRequired.h"
00034 #include "SVGStringList.h"
00035 #include "SVGTests.h"
00036 #include "UnitBezier.h"
00037 
00038 namespace WebCore {
00039     
00040     class ConditionEventListener;
00041     class TimeContainer;
00042 
00043     class SVGAnimationElement : public SVGSMILElement,
00044                                 public SVGTests,
00045                                 public SVGExternalResourcesRequired,
00046                                 public ElementTimeControl
00047     {
00048     public:
00049         SVGAnimationElement(const QualifiedName&, Document*);
00050         virtual ~SVGAnimationElement();
00051         
00052         virtual void parseMappedAttribute(MappedAttribute*);
00053         virtual void attributeChanged(Attribute*, bool preserveDecls);
00054 
00055         // SVGAnimationElement
00056         float getStartTime() const;
00057         float getCurrentTime() const;
00058         float getSimpleDuration(ExceptionCode&) const;
00059         
00060         // ElementTimeControl
00061         virtual bool beginElement(ExceptionCode&);
00062         virtual bool beginElementAt(float offset, ExceptionCode&);
00063         virtual bool endElement(ExceptionCode&);
00064         virtual bool endElementAt(float offset, ExceptionCode&);
00065         
00066         static bool attributeIsCSS(const String& attributeName);
00067 
00068 protected:
00069         
00070         enum CalcMode { CalcModeDiscrete, CalcModeLinear, CalcModePaced, CalcModeSpline };
00071         CalcMode calcMode() const;
00072         
00073         enum AttributeType { AttributeTypeCSS, AttributeTypeXML, AttributeTypeAuto };
00074         AttributeType attributeType() const;
00075         
00076         String toValue() const;
00077         String byValue() const;
00078         String fromValue() const;
00079         
00080         enum AnimationMode { NoAnimation, ToAnimation, ByAnimation, ValuesAnimation, FromToAnimation, FromByAnimation, PathAnimation };
00081         AnimationMode animationMode() const;
00082 
00083         virtual bool hasValidTarget() const;
00084         
00085         String targetAttributeBaseValue() const;
00086         void setTargetAttributeAnimatedValue(const String&);
00087         bool targetAttributeIsCSS() const;
00088         
00089         bool isAdditive() const;
00090         bool isAccumulated() const;
00091     
00092         // from SVGSMILElement
00093         virtual void startedActiveInterval();
00094         virtual void updateAnimation(float percent, unsigned repeat, SVGSMILElement* resultElement);
00095         virtual void endedActiveInterval();
00096         
00097         ANIMATED_PROPERTY_FORWARD_DECLARATIONS(SVGExternalResourcesRequired, bool, ExternalResourcesRequired, externalResourcesRequired)
00098 private:
00099         virtual bool calculateFromAndToValues(const String& fromString, const String& toString) = 0;
00100         virtual bool calculateFromAndByValues(const String& fromString, const String& byString) = 0;
00101         virtual void calculateAnimatedValue(float percentage, unsigned repeat, SVGSMILElement* resultElement) = 0;
00102         virtual float calculateDistance(const String& fromString, const String& toString) { return -1.f; }
00103         virtual Path animationPath() const { return Path(); }
00104         
00105         void currentValuesForValuesAnimation(float percent, float& effectivePercent, String& from, String& to) const;
00106         void calculateKeyTimesForCalcModePaced();
00107         float calculatePercentFromKeyPoints(float percent) const;
00108         void currentValuesFromKeyPoints(float percent, float& effectivePercent, String& from, String& to) const;
00109         float calculatePercentForSpline(float percent, unsigned splineIndex) const;
00110         
00111 protected:
00112         bool m_animationValid;
00113 
00114         Vector<String> m_values;
00115         Vector<float> m_keyTimes;
00116         Vector<float> m_keyPoints;
00117         Vector<UnitBezier> m_keySplines;
00118         String m_lastValuesAnimationFrom;
00119         String m_lastValuesAnimationTo;
00120     };
00121 
00122 } // namespace WebCore
00123 
00124 #endif // ENABLE(SVG)
00125 #endif // SVGAnimationElement_h

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