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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_dom_TimeRanges_h_
#define mozilla_dom_TimeRanges_h_
#include "nsCOMPtr.h"
#include "nsIDOMTimeRanges.h"
#include "nsISupports.h"
#include "nsTArray.h"
#include "nsWrapperCache.h"
#include "mozilla/ErrorResult.h"
namespace mozilla {
namespace dom {
class TimeRanges;
} // namespace dom
namespace dom {
// Implements media TimeRanges:
// http://www.whatwg.org/specs/web-apps/current-work/multipage/video.html#timeranges
class TimeRanges final : public nsIDOMTimeRanges,
public nsWrapperCache
{
public:
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(TimeRanges)
NS_DECL_NSIDOMTIMERANGES
TimeRanges();
explicit TimeRanges(nsISupports* aParent);
void Add(double aStart, double aEnd);
// Returns the start time of the first range, or -1 if no ranges exist.
double GetStartTime();
// Returns the end time of the last range, or -1 if no ranges exist.
double GetEndTime();
// See http://www.whatwg.org/html/#normalized-timeranges-object
void Normalize(double aTolerance = 0.0);
// Mutate this TimeRange to be the union of this and aOtherRanges.
void Union(const TimeRanges* aOtherRanges, double aTolerance);
// Mutate this TimeRange to be the intersection of this and aOtherRanges.
void Intersection(const TimeRanges* aOtherRanges);
virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
nsISupports* GetParentObject() const;
uint32_t Length() const
{
return mRanges.Length();
}
virtual double Start(uint32_t aIndex, ErrorResult& aRv);
virtual double End(uint32_t aIndex, ErrorResult& aRv);
// Shift all values by aOffset seconds.
void Shift(double aOffset);
private:
~TimeRanges();
// Comparator which orders TimeRanges by start time. Used by Normalize().
struct TimeRange
{
TimeRange(double aStart, double aEnd)
: mStart(aStart),
mEnd(aEnd) {}
double mStart;
double mEnd;
};
struct CompareTimeRanges
{
bool Equals(const TimeRange& aTr1, const TimeRange& aTr2) const {
return aTr1.mStart == aTr2.mStart && aTr1.mEnd == aTr2.mEnd;
}
bool LessThan(const TimeRange& aTr1, const TimeRange& aTr2) const {
return aTr1.mStart < aTr2.mStart;
}
};
AutoTArray<TimeRange,4> mRanges;
nsCOMPtr<nsISupports> mParent;
public:
typedef nsTArray<TimeRange>::index_type index_type;
static const index_type NoIndex = index_type(-1);
index_type Find(double aTime, double aTolerance = 0);
bool Contains(double aStart, double aEnd) {
index_type target = Find(aStart);
if (target == NoIndex) {
return false;
}
return mRanges[target].mEnd >= aEnd;
}
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_TimeRanges_h_
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