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
33namespace WebCore {
34
35class SMILTime {
36public:
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
51private:
52    static const double unresolvedValue;
53    static const double indefiniteValue;
54
55    double m_time;
56};
57
58inline bool operator==(const SMILTime& a, const SMILTime& b) { return a.isFinite() && a.value() == b.value(); }
59inline bool operator!(const SMILTime& a) { return !a.isFinite() || !a.value(); }
60inline bool operator!=(const SMILTime& a, const SMILTime& b) { return !operator==(a, b); }
61inline bool operator>(const SMILTime& a, const SMILTime& b) { return a.value() > b.value(); }
62inline bool operator<(const SMILTime& a, const SMILTime& b) { return a.value() < b.value(); }
63inline bool operator>=(const SMILTime& a, const SMILTime& b) { return a.value() > b.value() || operator==(a, b); }
64inline bool operator<=(const SMILTime& a, const SMILTime& b) { return a.value() < b.value() || operator==(a, b); }
65
66SMILTime operator+(const SMILTime&, const SMILTime&);
67SMILTime operator-(const SMILTime&, const SMILTime&);
68// So multiplying times does not make too much sense but SMIL defines it for duration * repeatCount
69SMILTime operator*(const SMILTime&, const SMILTime&);
70
71}
72
73#endif // ENABLE(SVG)
74#endif // SMILTime_h
75