зеркало из https://github.com/mozilla/gecko-dev.git
86 строки
2.6 KiB
C++
86 строки
2.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 NS_SMILINTERVAL_H_
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#define NS_SMILINTERVAL_H_
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#include "nsSMILInstanceTime.h"
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#include "nsTArray.h"
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//----------------------------------------------------------------------
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// nsSMILInterval class
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//
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// A structure consisting of a begin and end time. The begin time must be
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// resolved (i.e. not indefinite or unresolved).
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//
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// For an overview of how this class is related to other SMIL time classes see
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// the documentation in nsSMILTimeValue.h
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class nsSMILInterval
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{
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public:
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nsSMILInterval();
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nsSMILInterval(const nsSMILInterval& aOther);
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~nsSMILInterval();
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void Unlink(bool aFiltered = false);
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const nsSMILInstanceTime* Begin() const
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{
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MOZ_ASSERT(mBegin && mEnd,
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"Requesting Begin() on un-initialized instance time");
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return mBegin;
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}
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nsSMILInstanceTime* Begin();
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const nsSMILInstanceTime* End() const
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{
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MOZ_ASSERT(mBegin && mEnd,
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"Requesting End() on un-initialized instance time");
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return mEnd;
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}
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nsSMILInstanceTime* End();
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void SetBegin(nsSMILInstanceTime& aBegin);
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void SetEnd(nsSMILInstanceTime& aEnd);
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void Set(nsSMILInstanceTime& aBegin, nsSMILInstanceTime& aEnd)
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{
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SetBegin(aBegin);
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SetEnd(aEnd);
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}
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void FixBegin();
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void FixEnd();
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typedef nsTArray<nsRefPtr<nsSMILInstanceTime> > InstanceTimeList;
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void AddDependentTime(nsSMILInstanceTime& aTime);
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void RemoveDependentTime(const nsSMILInstanceTime& aTime);
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void GetDependentTimes(InstanceTimeList& aTimes);
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// Cue for assessing if this interval can be filtered
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bool IsDependencyChainLink() const;
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private:
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nsRefPtr<nsSMILInstanceTime> mBegin;
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nsRefPtr<nsSMILInstanceTime> mEnd;
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// nsSMILInstanceTimes to notify when this interval is changed or deleted.
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InstanceTimeList mDependentTimes;
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// Indicates if the end points of the interval are fixed or not.
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//
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// Note that this is not the same as having an end point whose TIME is fixed
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// (i.e. nsSMILInstanceTime::IsFixed() returns true). This is because it is
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// possible to have an end point with a fixed TIME and yet still update the
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// end point to refer to a different nsSMILInstanceTime object.
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//
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// However, if mBegin/EndFixed is true, then BOTH the nsSMILInstanceTime
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// OBJECT returned for that end point and its TIME value will not change.
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bool mBeginFixed;
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bool mEndFixed;
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};
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#endif // NS_SMILINTERVAL_H_
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