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author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
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committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
tree | 10027f336435511475e392454359edea8e25895d /dom/html/TimeRanges.h | |
parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
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Add m-esr52 at 52.6.0
Diffstat (limited to 'dom/html/TimeRanges.h')
-rw-r--r-- | dom/html/TimeRanges.h | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/dom/html/TimeRanges.h b/dom/html/TimeRanges.h new file mode 100644 index 000000000..1811346fa --- /dev/null +++ b/dom/html/TimeRanges.h @@ -0,0 +1,119 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* 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_ |