mirror of
https://github.com/servo/servo.git
synced 2025-06-06 16:45:39 +00:00
3b0619aedd
This is preparation for sharing this code with layout_2020 and implementing selective off-the-main-thread animations. We still look for nodes not in the flow tree in the layout thread.
49 lines
1.5 KiB
Rust
49 lines
1.5 KiB
Rust
/* 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 https://mozilla.org/MPL/2.0/. */
|
|
|
|
#![deny(missing_docs)]
|
|
|
|
//! A timeline module, used to specify an `AnimationTimeline` which determines
|
|
//! the time used for synchronizing animations in the script thread.
|
|
|
|
use time;
|
|
|
|
/// A `AnimationTimeline` which is used to synchronize animations during the script
|
|
/// event loop.
|
|
#[derive(Clone, Copy, Debug, JSTraceable, MallocSizeOf)]
|
|
pub(crate) struct AnimationTimeline {
|
|
current_value: f64,
|
|
}
|
|
|
|
impl AnimationTimeline {
|
|
/// Creates a new "normal" timeline, i.e., a "Current" mode timer.
|
|
#[inline]
|
|
pub fn new() -> Self {
|
|
Self {
|
|
current_value: time::precise_time_s(),
|
|
}
|
|
}
|
|
|
|
/// Creates a new "test mode" timeline, with initial time 0.
|
|
#[inline]
|
|
pub fn new_for_testing() -> Self {
|
|
Self { current_value: 0. }
|
|
}
|
|
|
|
/// Returns the current value of the timeline in seconds.
|
|
pub fn current_value(&self) -> f64 {
|
|
self.current_value
|
|
}
|
|
|
|
/// Updates the value of the `AnimationTimeline` to the current clock time.
|
|
pub fn update(&mut self) {
|
|
self.current_value = time::precise_time_s();
|
|
}
|
|
|
|
/// Increments the current value of the timeline by a specific number of seconds.
|
|
/// This is used for testing.
|
|
pub fn advance_specific(&mut self, by: f64) {
|
|
self.current_value += by;
|
|
}
|
|
}
|