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      1 /*
      2  * Copyright (c) 2013, Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
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     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "config.h"
     32 #include "core/platform/animation/TimingFunctionTestHelper.h"
     33 
     34 
     35 namespace WebCore {
     36 
     37 // This class exists so that ChainedTimingFunction only needs to friend one thing.
     38 class ChainedTimingFunctionTestHelper {
     39     static void PrintTo(const ChainedTimingFunction& timingFunction, ::std::ostream* os)
     40     {
     41         // Forward declare the generic PrintTo function as ChainedTimingFunction needs to call it.
     42         void PrintTo(const TimingFunction&, ::std::ostream*);
     43 
     44         *os << "ChainedTimingFunction@" << &timingFunction << "(";
     45         for (size_t i = 0; i < timingFunction.m_segments.size(); i++) {
     46             ChainedTimingFunction::Segment segment = timingFunction.m_segments[i];
     47             PrintTo(*(segment.m_timingFunction.get()), os);
     48             *os << "[" << segment.m_min << " -> " << segment.m_max << "]";
     49             if (i+1 != timingFunction.m_segments.size()) {
     50                 *os << ", ";
     51             }
     52         }
     53         *os << ")";
     54     }
     55 
     56     static bool equals(const ChainedTimingFunction& lhs, const TimingFunction& rhs)
     57     {
     58         if (rhs.type() != TimingFunction::ChainedFunction)
     59             return false;
     60 
     61         if (&lhs == &rhs)
     62             return true;
     63 
     64         const ChainedTimingFunction& ctf = toChainedTimingFunction(rhs);
     65         if (lhs.m_segments.size() != ctf.m_segments.size())
     66             return false;
     67 
     68         for (size_t i = 0; i < lhs.m_segments.size(); i++) {
     69             if (!equals(lhs.m_segments[i], ctf.m_segments[i]))
     70                 return false;
     71         }
     72         return true;
     73     }
     74 
     75     static bool equals(const ChainedTimingFunction::Segment& lhs, const ChainedTimingFunction::Segment& rhs)
     76     {
     77         if (&lhs == &rhs)
     78             return true;
     79 
     80         if ((lhs.m_min != rhs.m_min) || (lhs.m_max != rhs.m_max))
     81             return false;
     82 
     83         if (lhs.m_timingFunction == rhs.m_timingFunction)
     84             return true;
     85 
     86         ASSERT(lhs.m_timingFunction);
     87         ASSERT(rhs.m_timingFunction);
     88 
     89         return (*(lhs.m_timingFunction.get())) == (*(rhs.m_timingFunction.get()));
     90     }
     91 
     92     friend void PrintTo(const ChainedTimingFunction&, ::std::ostream*);
     93     friend bool operator==(const ChainedTimingFunction& lhs, const TimingFunction& rhs);
     94 };
     95 
     96 void PrintTo(const LinearTimingFunction& timingFunction, ::std::ostream* os)
     97 {
     98     *os << "LinearTimingFunction@" << &timingFunction;
     99 }
    100 
    101 void PrintTo(const CubicBezierTimingFunction& timingFunction, ::std::ostream* os)
    102 {
    103     *os << "CubicBezierTimingFunction@" << &timingFunction << "(";
    104     switch (timingFunction.subType()) {
    105     case CubicBezierTimingFunction::Ease:
    106         *os << "Ease";
    107         break;
    108     case CubicBezierTimingFunction::EaseIn:
    109         *os << "EaseIn";
    110         break;
    111     case CubicBezierTimingFunction::EaseOut:
    112         *os << "EaseOut";
    113         break;
    114     case CubicBezierTimingFunction::EaseInOut:
    115         *os << "EaseInOut";
    116         break;
    117     case CubicBezierTimingFunction::Custom:
    118         *os << "Custom";
    119         break;
    120     default:
    121         ASSERT_NOT_REACHED();
    122     }
    123     *os << ", " << timingFunction.x1();
    124     *os << ", " << timingFunction.y1();
    125     *os << ", " << timingFunction.x2();
    126     *os << ", " << timingFunction.y2();
    127     *os << ")";
    128 }
    129 
    130 void PrintTo(const StepsTimingFunction& timingFunction, ::std::ostream* os)
    131 {
    132     *os << "StepsTimingFunction@" << &timingFunction << "(";
    133     switch (timingFunction.subType()) {
    134     case StepsTimingFunction::Start:
    135         *os << "Start";
    136         break;
    137     case StepsTimingFunction::End:
    138         *os << "End";
    139         break;
    140     case StepsTimingFunction::Custom:
    141         *os << "Custom";
    142         break;
    143     default:
    144         ASSERT_NOT_REACHED();
    145     }
    146     *os << ", " << timingFunction.numberOfSteps();
    147     *os << ", " << (timingFunction.stepAtStart() ? "true" : "false");
    148     *os << ")";
    149 }
    150 
    151 void PrintTo(const ChainedTimingFunction& timingFunction, ::std::ostream* os)
    152 {
    153     ChainedTimingFunctionTestHelper::PrintTo(timingFunction, os);
    154 }
    155 
    156 // The generic PrintTo *must* come after the non-generic PrintTo otherwise it
    157 // will end up calling itself.
    158 void PrintTo(const TimingFunction& timingFunction, ::std::ostream* os)
    159 {
    160     switch (timingFunction.type()) {
    161     case TimingFunction::LinearFunction: {
    162         const LinearTimingFunction& linear = toLinearTimingFunction(timingFunction);
    163         PrintTo(linear, os);
    164         return;
    165     }
    166     case TimingFunction::CubicBezierFunction: {
    167         const CubicBezierTimingFunction& cubic = toCubicBezierTimingFunction(timingFunction);
    168         PrintTo(cubic, os);
    169         return;
    170     }
    171     case TimingFunction::StepsFunction: {
    172         const StepsTimingFunction& step = toStepsTimingFunction(timingFunction);
    173         PrintTo(step, os);
    174         return;
    175     }
    176     case TimingFunction::ChainedFunction: {
    177         const ChainedTimingFunction& chained = toChainedTimingFunction(timingFunction);
    178         PrintTo(chained, os);
    179         return;
    180     }
    181     default:
    182         ASSERT_NOT_REACHED();
    183     }
    184 }
    185 
    186 bool operator==(const LinearTimingFunction& lhs, const TimingFunction& rhs)
    187 {
    188     return rhs.type() == TimingFunction::LinearFunction;
    189 }
    190 
    191 bool operator==(const CubicBezierTimingFunction& lhs, const TimingFunction& rhs)
    192 {
    193     if (rhs.type() != TimingFunction::CubicBezierFunction)
    194         return false;
    195 
    196     const CubicBezierTimingFunction& ctf = toCubicBezierTimingFunction(rhs);
    197     if ((lhs.subType() == CubicBezierTimingFunction::Custom) && (ctf.subType() == CubicBezierTimingFunction::Custom))
    198         return (lhs.x1() == ctf.x1()) && (lhs.y1() == ctf.y1()) && (lhs.x2() == ctf.x2()) && (lhs.y2() == ctf.y2());
    199 
    200     return lhs.subType() == ctf.subType();
    201 }
    202 
    203 bool operator==(const StepsTimingFunction& lhs, const TimingFunction& rhs)
    204 {
    205     if (rhs.type() != TimingFunction::StepsFunction)
    206         return false;
    207 
    208     const StepsTimingFunction& stf = toStepsTimingFunction(rhs);
    209     if ((lhs.subType() == StepsTimingFunction::Custom) && (stf.subType() == StepsTimingFunction::Custom))
    210         return (lhs.numberOfSteps() == stf.numberOfSteps()) && (lhs.stepAtStart() == stf.stepAtStart());
    211 
    212     return lhs.subType() == stf.subType();
    213 }
    214 
    215 bool operator==(const ChainedTimingFunction& lhs, const TimingFunction& rhs)
    216 {
    217     return ChainedTimingFunctionTestHelper::equals(lhs, rhs);
    218 }
    219 
    220 // Like in the PrintTo case, the generic operator== *must* come after the
    221 // non-generic operator== otherwise it will end up calling itself.
    222 bool operator==(const TimingFunction& lhs, const TimingFunction& rhs)
    223 {
    224     switch (lhs.type()) {
    225     case TimingFunction::LinearFunction: {
    226         const LinearTimingFunction& linear = toLinearTimingFunction(lhs);
    227         return (linear == rhs);
    228     }
    229     case TimingFunction::CubicBezierFunction: {
    230         const CubicBezierTimingFunction& cubic = toCubicBezierTimingFunction(lhs);
    231         return (cubic == rhs);
    232     }
    233     case TimingFunction::StepsFunction: {
    234         const StepsTimingFunction& step = toStepsTimingFunction(lhs);
    235         return (step == rhs);
    236     }
    237     case TimingFunction::ChainedFunction: {
    238         const ChainedTimingFunction& chained = toChainedTimingFunction(lhs);
    239         return (chained == rhs);
    240     }
    241     default:
    242         ASSERT_NOT_REACHED();
    243     }
    244     return false;
    245 }
    246 
    247 // No need to define specific operator!= as they can all come via this function.
    248 bool operator!=(const TimingFunction& lhs, const TimingFunction& rhs)
    249 {
    250     return !(lhs == rhs);
    251 }
    252 
    253 } // namespace WebCore
    254