mirror of
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120 lines
3.1 KiB
C++
120 lines
3.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_TimeRanges_h_
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#define mozilla_dom_TimeRanges_h_
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#include "nsIDOMTimeRanges.h"
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#include "nsISupports.h"
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#include "nsTArray.h"
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#include "nsWrapperCache.h"
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#include "mozilla/ErrorResult.h"
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#include "nsAutoPtr.h"
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namespace mozilla {
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namespace dom {
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class TimeRanges;
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} // namespace dom
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namespace dom {
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// Implements media TimeRanges:
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// http://www.whatwg.org/specs/web-apps/current-work/multipage/video.html#timeranges
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class TimeRanges final : public nsIDOMTimeRanges,
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public nsWrapperCache
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{
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public:
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(TimeRanges)
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NS_DECL_NSIDOMTIMERANGES
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TimeRanges();
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explicit TimeRanges(nsISupports* aParent);
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void Add(double aStart, double aEnd);
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// Returns the start time of the first range, or -1 if no ranges exist.
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double GetStartTime();
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// Returns the end time of the last range, or -1 if no ranges exist.
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double GetEndTime();
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// See http://www.whatwg.org/html/#normalized-timeranges-object
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void Normalize(double aTolerance = 0.0);
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// Mutate this TimeRange to be the union of this and aOtherRanges.
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void Union(const TimeRanges* aOtherRanges, double aTolerance);
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// Mutate this TimeRange to be the intersection of this and aOtherRanges.
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void Intersection(const TimeRanges* aOtherRanges);
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virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
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nsISupports* GetParentObject() const;
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uint32_t Length() const
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{
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return mRanges.Length();
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}
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virtual double Start(uint32_t aIndex, ErrorResult& aRv);
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virtual double End(uint32_t aIndex, ErrorResult& aRv);
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// Shift all values by aOffset seconds.
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void Shift(double aOffset);
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private:
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~TimeRanges();
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// Comparator which orders TimeRanges by start time. Used by Normalize().
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struct TimeRange
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{
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TimeRange(double aStart, double aEnd)
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: mStart(aStart),
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mEnd(aEnd) {}
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double mStart;
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double mEnd;
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};
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struct CompareTimeRanges
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{
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bool Equals(const TimeRange& aTr1, const TimeRange& aTr2) const {
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return aTr1.mStart == aTr2.mStart && aTr1.mEnd == aTr2.mEnd;
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}
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bool LessThan(const TimeRange& aTr1, const TimeRange& aTr2) const {
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return aTr1.mStart < aTr2.mStart;
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}
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};
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nsAutoTArray<TimeRange,4> mRanges;
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nsCOMPtr<nsISupports> mParent;
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public:
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typedef nsTArray<TimeRange>::index_type index_type;
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static const index_type NoIndex = index_type(-1);
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index_type Find(double aTime, double aTolerance = 0);
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bool Contains(double aStart, double aEnd) {
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index_type target = Find(aStart);
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if (target == NoIndex) {
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return false;
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}
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return mRanges[target].mEnd >= aEnd;
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}
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_TimeRanges_h_
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