/* -*- 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/. */
/* * A significant moment in an SMILTimedElement'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 * SMILTimedElement) 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 SMILMilestone { public:
constexpr SMILMilestone(SMILTime aTime, bool aIsEnd)
: mTime(aTime), mIsEnd(aIsEnd) {}
SMILTime 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.
};
} // namespace mozilla
#endif// DOM_SMIL_SMILMILESTONE_H_
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