khtml/svg/animation/SMILTime.h

   1 /*
   2  * Copyright (C) 2008 Apple 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
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef SMILTime_h
  27 #define SMILTime_h
  28
  29 #if ENABLE(SVG)
  30
  31 #include <algorithm>
  32
  33 namespace WebCore {
  34
  35     class SMILTime {
  36     public:
  37         SMILTime() : m_time(0) { }
  38         SMILTime(double time) : m_time(time) { }
  39         SMILTime(const SMILTime& o) : m_time(o.m_time) { }
  40
  41         static SMILTime unresolved() { return unresolvedValue; }
  42         static SMILTime indefinite() { return indefiniteValue; }
  43
  44         SMILTime& operator=(const SMILTime& o) { m_time = o.m_time; return *this; }
  45         double value() const { return m_time; }
  46
  47         bool isFinite() const { return m_time < indefiniteValue; }
  48         bool isIndefinite() const { return m_time == indefiniteValue; }
  49         bool isUnresolved() const { return m_time == unresolvedValue; }
  50
  51     private:
  52         static const double unresolvedValue;
  53         static const double indefiniteValue;
  54
  55         double m_time;
  56     };
  57
  58     inline bool operator==(const SMILTime& a, const SMILTime& b) { return a.isFinite() && a.value() == b.value(); }
  59     inline bool operator!=(const SMILTime& a, const SMILTime& b) { return !operator==(a, b); }
  60     inline bool operator>(const SMILTime& a, const SMILTime& b) { return a.value() > b.value(); }
  61     inline bool operator<(const SMILTime& a, const SMILTime& b) { return a.value() < b.value(); }
  62     inline bool operator>=(const SMILTime& a, const SMILTime& b) { return a.value() > b.value() || operator==(a, b); }
  63     inline bool operator<=(const SMILTime& a, const SMILTime& b) { return a.value() < b.value() || operator==(a, b); }
  64
  65     inline SMILTime max(const SMILTime& a, const SMILTime& b) { return std::max(a.value(), b.value()); }
  66     inline SMILTime min(const SMILTime& a, const SMILTime& b) { return std::min(a.value(), b.value()); }
  67     SMILTime operator+(const SMILTime&, const SMILTime&);
  68     SMILTime operator-(const SMILTime&, const SMILTime&);
  69     // So multiplying times does not make too much sense but SMIL defines it for duration * repeatCount
  70     SMILTime operator*(const SMILTime&, const SMILTime&);
  71 }
  72
  73 #endif
  74 #endif