third_party/WebKit/Source/core/html/TimeRanges.h

   1 /*
   2  * Copyright (C) 2007, 2009 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 COMPUTER, 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 COMPUTER, 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 TimeRanges_h
  27 #define TimeRanges_h
  28
  29 #include "bindings/core/v8/ScriptWrappable.h"
  30 #include "core/CoreExport.h"
  31 #include "platform/heap/Handle.h"
  32 #include "public/platform/WebTimeRange.h"
  33 #include "wtf/Allocator.h"
  34 #include "wtf/Vector.h"
  35
  36 #include <algorithm>
  37
  38 namespace blink {
  39
  40 class ExceptionState;
  41
  42 class CORE_EXPORT TimeRanges : public GarbageCollectedFinalized<TimeRanges>, public ScriptWrappable {
  43     DEFINE_WRAPPERTYPEINFO();
  44 public:
  45     // We consider all the Ranges to be semi-bounded as follow: [start, end[
  46     struct Range {
  47         ALLOW_ONLY_INLINE_ALLOCATION();
  48     public:
  49         Range() { }
  50         Range(double start, double end)
  51         {
  52             m_start = start;
  53             m_end = end;
  54         }
  55         double m_start;
  56         double m_end;
  57
  58         inline bool isPointInRange(double point) const
  59         {
  60             return m_start <= point && point < m_end;
  61         }
  62
  63         inline bool isOverlappingRange(const Range& range) const
  64         {
  65             return isPointInRange(range.m_start) || isPointInRange(range.m_end) || range.isPointInRange(m_start);
  66         }
  67
  68         inline bool isContiguousWithRange(const Range& range) const
  69         {
  70             return range.m_start == m_end || range.m_end == m_start;
  71         }
  72
  73         inline Range unionWithOverlappingOrContiguousRange(const Range& range) const
  74         {
  75             Range ret;
  76
  77             ret.m_start = std::min(m_start, range.m_start);
  78             ret.m_end = std::max(m_end, range.m_end);
  79
  80             return ret;
  81         }
  82
  83         inline bool isBeforeRange(const Range& range) const
  84         {
  85             return range.m_start >= m_end;
  86         }
  87     };
  88
  89     static TimeRanges* create()
  90     {
  91         return new TimeRanges;
  92     }
  93     static TimeRanges* create(double start, double end)
  94     {
  95         return new TimeRanges(start, end);
  96     }
  97     static TimeRanges* create(const WebTimeRanges&);
  98
  99     TimeRanges* copy() const;
 100     void intersectWith(const TimeRanges*);
 101     void unionWith(const TimeRanges*);
 102
 103     unsigned length() const { return m_ranges.size(); }
 104     double start(unsigned index, ExceptionState&) const;
 105     double end(unsigned index, ExceptionState&) const;
 106
 107     void add(double start, double end);
 108
 109     bool contain(double time) const;
 110
 111     double nearest(double newPlaybackPosition, double currentPlaybackPosition) const;
 112
 113     DEFINE_INLINE_TRACE() { }
 114
 115 private:
 116     TimeRanges() { }
 117
 118     TimeRanges(double start, double end);
 119
 120     void invert();
 121
 122     Vector<Range> m_ranges;
 123 };
 124
 125 } // namespace blink
 126
 127 #endif // TimeRanges_h