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/*
* Copyright (C) 2007, 2009 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef TimeRanges_h
#define TimeRanges_h
#include "ExceptionCode.h"
#include <algorithm>
#include <wtf/PassRefPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/Vector.h>
namespace WebCore {
class TimeRanges : public RefCounted<TimeRanges> {
public:
static PassRefPtr<TimeRanges> create()
{
return adoptRef(new TimeRanges);
}
static PassRefPtr<TimeRanges> create(float start, float end)
{
return adoptRef(new TimeRanges(start, end));
}
PassRefPtr<TimeRanges> copy();
unsigned length() const { return m_ranges.size(); }
float start(unsigned index, ExceptionCode&) const;
float end(unsigned index, ExceptionCode&) const;
void add(float start, float end);
bool contain(float time) const;
private:
TimeRanges() { }
TimeRanges(float start, float end);
TimeRanges(const TimeRanges&);
// We consider all the Ranges to be semi-bounded as follow: [start, end[
struct Range {
Range() { }
Range(float start, float end)
{
m_start = start;
m_end = end;
}
float m_start;
float m_end;
inline bool isPointInRange(float point) const
{
return m_start <= point && point < m_end;
}
inline bool isOverlappingRange(const Range& range) const
{
return isPointInRange(range.m_start) || isPointInRange(range.m_end) || range.isPointInRange(m_start);
}
inline bool isContiguousWithRange(const Range& range) const
{
return range.m_start == m_end || range.m_end == m_start;
}
inline Range unionWithOverlappingOrContiguousRange(const Range& range) const
{
Range ret;
ret.m_start = std::min(m_start, range.m_start);
ret.m_end = std::max(m_end, range.m_end);
return ret;
}
inline bool isBeforeRange(const Range& range) const
{
return range.m_start >= m_end;
}
};
Vector<Range> m_ranges;
};
} // namespace WebCore
#endif
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