зеркало из https://github.com/mozilla/gecko-dev.git
111 строки
4.3 KiB
C++
111 строки
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is the Mozilla SMIL module.
|
|
*
|
|
* The Initial Developer of the Original Code is Brian Birtles.
|
|
* Portions created by the Initial Developer are Copyright (C) 2009
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Brian Birtles <birtles@gmail.com>
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either of the GNU General Public License Version 2 or later (the "GPL"),
|
|
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#ifndef NS_SMILMILESTONE_H_
|
|
#define NS_SMILMILESTONE_H_
|
|
|
|
/*
|
|
* A significant moment in an nsSMILTimedElement's lifetime where a sample is
|
|
* required.
|
|
*
|
|
* Animations register the next milestone in their lifetime with the time
|
|
* container that they belong to. When the animation controller goes to run
|
|
* a sample it first visits all the animations that have a registered milestone
|
|
* in order of their milestone times. This allows interdependencies between
|
|
* animations to be correctly resolved and events to fire in the proper order.
|
|
*
|
|
* A distinction is made between a milestone representing the end of an interval
|
|
* and any other milestone. This is because if animation A ends at time t, and
|
|
* animation B begins at the same time t (or has some other significant moment
|
|
* such as firing a repeat event), SMIL's endpoint-exclusive timing model
|
|
* implies that the interval end occurs first. In fact, interval ends can be
|
|
* thought of as ending an infinitesimally small time before t. Therefore,
|
|
* A should be sampled before B.
|
|
*
|
|
* Furthermore, this distinction between sampling the end of an interval and
|
|
* a regular sample is used within the timing model (specifically in
|
|
* nsSMILTimedElement) to ensure that all intervals ending at time t are sampled
|
|
* before any new intervals are entered so that we have a fully up-to-date set
|
|
* of instance times available before committing to a new interval. Once an
|
|
* interval is entered, the begin time is fixed.
|
|
*/
|
|
class nsSMILMilestone
|
|
{
|
|
public:
|
|
nsSMILMilestone(nsSMILTime aTime, bool aIsEnd)
|
|
: mTime(aTime), mIsEnd(aIsEnd)
|
|
{ }
|
|
|
|
nsSMILMilestone()
|
|
: mTime(0), mIsEnd(false)
|
|
{ }
|
|
|
|
bool operator==(const nsSMILMilestone& aOther) const
|
|
{
|
|
return mTime == aOther.mTime && mIsEnd == aOther.mIsEnd;
|
|
}
|
|
|
|
bool operator!=(const nsSMILMilestone& aOther) const
|
|
{
|
|
return !(*this == aOther);
|
|
}
|
|
|
|
bool operator<(const nsSMILMilestone& aOther) const
|
|
{
|
|
// Earlier times sort first, and for equal times end milestones sort first
|
|
return mTime < aOther.mTime ||
|
|
(mTime == aOther.mTime && mIsEnd && !aOther.mIsEnd);
|
|
}
|
|
|
|
bool operator<=(const nsSMILMilestone& aOther) const
|
|
{
|
|
return *this == aOther || *this < aOther;
|
|
}
|
|
|
|
bool operator>=(const nsSMILMilestone& aOther) const
|
|
{
|
|
return !(*this < aOther);
|
|
}
|
|
|
|
nsSMILTime mTime; // The milestone time. This may be in container time or
|
|
// parent container time depending on where it is used.
|
|
bool mIsEnd; // true if this milestone corresponds to an interval
|
|
// end, false otherwise.
|
|
};
|
|
|
|
#endif // NS_SMILMILESTONE_H_
|