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136 lines
4.1 KiB
C++
136 lines
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Mozilla SMIL module.
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*
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* The Initial Developer of the Original Code is Brian Birtles.
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* Portions created by the Initial Developer are Copyright (C) 2005
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Brian Birtles <birtles@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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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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//----------------------------------------------------------------------
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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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void Set(nsSMILInstanceTime& aBegin, nsSMILInstanceTime& aEnd)
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{
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NS_ABORT_IF_FALSE(aBegin.Time().IsResolved(),
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"Attempting to set unresolved begin time on an interval");
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mBegin = &aBegin;
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mEnd = &aEnd;
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}
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PRBool IsSet() const
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{
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NS_ABORT_IF_FALSE(!mBegin == !mEnd, "Bad interval: only one endpoint set");
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return !!mBegin;
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}
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void Reset()
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{
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mBegin = nsnull;
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mEnd = nsnull;
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}
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// Begin() and End() will be non-null so long as IsSet() is true. Otherwise,
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// they probably shouldn't be called.
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const nsSMILInstanceTime* Begin() const
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{
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NS_ABORT_IF_FALSE(mBegin, "Calling Begin() on un-set interval");
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return mBegin;
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}
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nsSMILInstanceTime* Begin()
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{
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NS_ABORT_IF_FALSE(mBegin, "Calling Begin() on un-set interval");
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return mBegin;
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}
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const nsSMILInstanceTime* End() const
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{
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NS_ABORT_IF_FALSE(mEnd, "Calling End() on un-set interval");
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return mEnd;
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}
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nsSMILInstanceTime* End()
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{
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NS_ABORT_IF_FALSE(mEnd, "Calling End() on un-set interval");
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return mEnd;
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}
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void SetBegin(nsSMILInstanceTime& aBegin)
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{
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NS_ABORT_IF_FALSE(mBegin, "Calling SetBegin() on un-set interval");
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NS_ABORT_IF_FALSE(aBegin.Time().IsResolved(),
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"Attempting to set unresolved begin time on interval");
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mBegin = &aBegin;
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}
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void SetEnd(nsSMILInstanceTime& aEnd)
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{
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NS_ABORT_IF_FALSE(mEnd, "Calling SetEnd() on un-set interval");
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mEnd = &aEnd;
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}
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void FreezeBegin()
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{
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NS_ABORT_IF_FALSE(mBegin, "Calling FreezeBegin() on un-set interval");
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mBegin->MarkNoLongerUpdating();
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}
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void FreezeEnd()
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{
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NS_ABORT_IF_FALSE(mEnd, "Calling FreezeEnd() on un-set interval");
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NS_ABORT_IF_FALSE(!mBegin->MayUpdate(),
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"Freezing the end of an interval without a fixed begin");
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mEnd->MarkNoLongerUpdating();
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}
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private:
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nsRefPtr<nsSMILInstanceTime> mBegin;
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nsRefPtr<nsSMILInstanceTime> mEnd;
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};
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#endif // NS_SMILINTERVAL_H_
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