Don't check all animation/transition properties when comparing RenderStyles

Source/core/platform/animation/TimingFunction.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 34 matching lines @@
         LinearFunction, CubicBezierFunction, StepsFunction, ChainedFunction
     };
 
     virtual ~TimingFunction() { }
 
     Type type() const { return m_type; }
 
     // Evaluates the timing function at the given fraction. The accuracy parameter provides a hint as to the required
     // accuracy and is not guaranteed.
     virtual double evaluate(double fraction, double accuracy) const = 0;
-    virtual bool operator==(const TimingFunction& other) const = 0;
 
 protected:
     TimingFunction(Type type)
         : m_type(type)
     {
     }
 
 private:
     Type m_type;
 };
 
 class LinearTimingFunction : public TimingFunction {
 public:
     static PassRefPtr<LinearTimingFunction> create()
     {
         return adoptRef(new LinearTimingFunction);
     }
 
     ~LinearTimingFunction() { }
 
     virtual double evaluate(double fraction, double) const
     {
         ASSERT(RuntimeEnabledFeatures::webAnimationsEnabled() || (fraction >= 0 && fraction <= 1));
         ASSERT_WITH_MESSAGE(!RuntimeEnabledFeatures::webAnimationsEnabled() || (fraction >= 0 && fraction <= 1), "Web Animations not yet implemented: Timing function behavior outside the range [0, 1] is not yet specified");
         return fraction;
     }
 
-    virtual bool operator==(const TimingFunction& other) const
-    {
-        return other.type() == LinearFunction;
-    }
-
 private:
     LinearTimingFunction()
         : TimingFunction(LinearFunction)
     {
     }
 };
 
 
 // Forward declare so we can friend it below. Don't use in production code!
 class ChainedTimingFunctionPrinter;
@@ skipping 46 matching lines @@
 
     virtual double evaluate(double fraction, double accuracy) const
     {
         ASSERT(RuntimeEnabledFeatures::webAnimationsEnabled() || (fraction >= 0 && fraction <= 1));
         ASSERT_WITH_MESSAGE(!RuntimeEnabledFeatures::webAnimationsEnabled() || (fraction >= 0 && fraction <= 1), "Web Animations not yet implemented: Timing function behavior outside the range [0, 1] is not yet specified");
         if (!m_bezier)
             m_bezier = adoptPtr(new UnitBezier(m_x1, m_y1, m_x2, m_y2));
         return m_bezier->solve(fraction, accuracy);
     }
 
-    virtual bool operator==(const TimingFunction& other) const
-    {
-        if (other.type() == CubicBezierFunction) {
-            const CubicBezierTimingFunction* ctf = static_cast<const CubicBezierTimingFunction*>(&other);
-            if (m_subType != Custom)
-                return m_subType == ctf->m_subType;
-
-            return m_x1 == ctf->m_x1 && m_y1 == ctf->m_y1 && m_x2 == ctf->m_x2 && m_y2 == ctf->m_y2;
-        }
-        return false;
-    }
-
     double x1() const { return m_x1; }
     double y1() const { return m_y1; }
     double x2() const { return m_x2; }
     double y2() const { return m_y2; }
 
     SubType subType() const { return m_subType; }
 
 private:
     explicit CubicBezierTimingFunction(SubType subType, double x1, double y1, double x2, double y2)
         : TimingFunction(CubicBezierFunction)
@@ skipping 48 matching lines @@
 
     ~StepsTimingFunction() { }
 
     virtual double evaluate(double fraction, double) const
     {
         ASSERT(RuntimeEnabledFeatures::webAnimationsEnabled() || (fraction >= 0 && fraction <= 1));
         ASSERT_WITH_MESSAGE(!RuntimeEnabledFeatures::webAnimationsEnabled() || (fraction >= 0 && fraction <= 1), "Web Animations not yet implemented: Timing function behavior outside the range [0, 1] is not yet specified");
         return std::min(1.0, (floor(m_steps * fraction) + m_stepAtStart) / m_steps);
     }
 
-    virtual bool operator==(const TimingFunction& other) const
-    {
-        if (other.type() == StepsFunction) {
-            const StepsTimingFunction* stf = static_cast<const StepsTimingFunction*>(&other);
-            if (m_subType != Custom)
-                return m_subType == stf->m_subType;
-            return m_steps == stf->m_steps && m_stepAtStart == stf->m_stepAtStart;
-        }
-        return false;
-    }
-
     int numberOfSteps() const { return m_steps; }
     bool stepAtStart() const { return m_stepAtStart; }
 
     SubType subType() const { return m_subType; }
 
 private:
     StepsTimingFunction(SubType subType, int steps, bool stepAtStart)
         : TimingFunction(StepsFunction)
         , m_steps(steps)
         , m_stepAtStart(stepAtStart)
@@ skipping 25 matching lines @@
         ASSERT(!m_segments.isEmpty());
         ASSERT(m_segments.last().max() == 1);
         size_t i = 0;
         const Segment* segment = &m_segments[i++];
         while (fraction >= segment->max() && i < m_segments.size()) {
             segment = &m_segments[i++];
         }
         return segment->evaluate(fraction, accuracy);
     }
 
-    virtual bool operator==(const TimingFunction& other) const
-    {
-        // This class is not exposed to CSS, so this method is not required.
-        ASSERT_NOT_REACHED();
-        return false;
-    }
-
 private:
     class Segment {
     public:
         Segment(double min, double max, TimingFunction* timingFunction)
             : m_min(min)
             , m_max(max)
             , m_timingFunction(timingFunction)
         { }
 
         double max() const { return m_max; }
@@ skipping 24 matching lines @@
     Vector<Segment> m_segments;
 
     // Allow printing of our segments. Can be removed once
     // ChainedTimingFunction has a public API for segments.
     friend class ChainedTimingFunctionPrinter;
 };
 
 } // namespace WebCore
 
 #endif // TimingFunction_h