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      1 /*
      2     Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann (at) kde.org>
      3                   2004, 2005, 2006 Rob Buis <buis (at) kde.org>
      4     Copyright (C) 2007 Eric Seidel <eric (at) webkit.org>
      5     Copyright (C) 2008 Apple Inc. All rights reserved.
      6     Copyright (C) 2008 Cameron McCormack <cam (at) mcc.id.au>
      7 
      8     This library is free software; you can redistribute it and/or
      9     modify it under the terms of the GNU Library General Public
     10     License as published by the Free Software Foundation; either
     11     version 2 of the License, or (at your option) any later version.
     12 
     13     This library is distributed in the hope that it will be useful,
     14     but WITHOUT ANY WARRANTY; without even the implied warranty of
     15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     16     Library General Public License for more details.
     17 
     18     You should have received a copy of the GNU Library General Public License
     19     along with this library; see the file COPYING.LIB.  If not, write to
     20     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     21     Boston, MA 02110-1301, USA.
     22 */
     23 
     24 #ifndef SVGAnimationElement_h
     25 #define SVGAnimationElement_h
     26 #if ENABLE(SVG_ANIMATION)
     27 
     28 #include "ElementTimeControl.h"
     29 #include "Path.h"
     30 #include "SMILTime.h"
     31 #include "SVGSMILElement.h"
     32 #include "SVGExternalResourcesRequired.h"
     33 #include "SVGStringList.h"
     34 #include "SVGTests.h"
     35 #include "UnitBezier.h"
     36 
     37 namespace WebCore {
     38 
     39     class ConditionEventListener;
     40     class TimeContainer;
     41 
     42     class SVGAnimationElement : public SVGSMILElement,
     43                                 public SVGTests,
     44                                 public SVGExternalResourcesRequired,
     45                                 public ElementTimeControl {
     46     public:
     47         SVGAnimationElement(const QualifiedName&, Document*);
     48         virtual ~SVGAnimationElement();
     49 
     50         virtual void parseMappedAttribute(MappedAttribute*);
     51         virtual void attributeChanged(Attribute*, bool preserveDecls);
     52         virtual void synchronizeProperty(const QualifiedName&);
     53 
     54         // SVGAnimationElement
     55         float getStartTime() const;
     56         float getCurrentTime() const;
     57         float getSimpleDuration(ExceptionCode&) const;
     58 
     59         // ElementTimeControl
     60         virtual void beginElement();
     61         virtual void beginElementAt(float offset);
     62         virtual void endElement();
     63         virtual void endElementAt(float offset);
     64 
     65         static bool attributeIsCSS(const String& attributeName);
     66 
     67     protected:
     68         enum CalcMode { CalcModeDiscrete, CalcModeLinear, CalcModePaced, CalcModeSpline };
     69         CalcMode calcMode() const;
     70 
     71         enum AttributeType { AttributeTypeCSS, AttributeTypeXML, AttributeTypeAuto };
     72         AttributeType attributeType() const;
     73 
     74         String toValue() const;
     75         String byValue() const;
     76         String fromValue() const;
     77 
     78         enum AnimationMode { NoAnimation, ToAnimation, ByAnimation, ValuesAnimation, FromToAnimation, FromByAnimation, PathAnimation };
     79         AnimationMode animationMode() const;
     80 
     81         virtual bool hasValidTarget() const;
     82 
     83         String targetAttributeBaseValue() const;
     84         void setTargetAttributeAnimatedValue(const String&);
     85         bool targetAttributeIsCSS() const;
     86 
     87         bool isAdditive() const;
     88         bool isAccumulated() const;
     89 
     90         // from SVGSMILElement
     91         virtual void startedActiveInterval();
     92         virtual void updateAnimation(float percent, unsigned repeat, SVGSMILElement* resultElement);
     93         virtual void endedActiveInterval();
     94 
     95     private:
     96         virtual bool calculateFromAndToValues(const String& fromString, const String& toString) = 0;
     97         virtual bool calculateFromAndByValues(const String& fromString, const String& byString) = 0;
     98         virtual void calculateAnimatedValue(float percentage, unsigned repeat, SVGSMILElement* resultElement) = 0;
     99         virtual float calculateDistance(const String& /*fromString*/, const String& /*toString*/) { return -1.f; }
    100         virtual Path animationPath() const { return Path(); }
    101 
    102         void currentValuesForValuesAnimation(float percent, float& effectivePercent, String& from, String& to) const;
    103         void calculateKeyTimesForCalcModePaced();
    104         float calculatePercentFromKeyPoints(float percent) const;
    105         void currentValuesFromKeyPoints(float percent, float& effectivePercent, String& from, String& to) const;
    106         float calculatePercentForSpline(float percent, unsigned splineIndex) const;
    107 
    108     protected:
    109         // SVGExternalResourcesRequired
    110         DECLARE_ANIMATED_PROPERTY(SVGAnimationElement, SVGNames::externalResourcesRequiredAttr, bool, ExternalResourcesRequired, externalResourcesRequired)
    111 
    112         bool m_animationValid;
    113 
    114         Vector<String> m_values;
    115         Vector<float> m_keyTimes;
    116         Vector<float> m_keyPoints;
    117         Vector<UnitBezier> m_keySplines;
    118         String m_lastValuesAnimationFrom;
    119         String m_lastValuesAnimationTo;
    120     };
    121 
    122 } // namespace WebCore
    123 
    124 #endif // ENABLE(SVG)
    125 #endif // SVGAnimationElement_h
    126