mirror of
https://github.com/servo/servo.git
synced 2025-06-10 01:23:13 +00:00
cbc363bedd
Previously, when processing animations, the compositor would sent a tick message to each pipeline. This is an issue because now the `ScriptThread` always processes rendering updates for all `Document`s in order to ensure properly ordering. This change makes it so that tick messages are sent for an entire WebView. This means that each `ScriptThread` will always receive a single tick for every time that animations are processed, no matter how many frames are animating. This is the first step toward a refresh driver. In addition, we discard the idea of ticking animation only for animations and or only for request animation frame callbacks. The `ScriptThread` can no longer make this distinction due to the specification and the compositor shouldn't either. This should not really change observable behavior, but should make Servo more efficient when more than a single frame in a `ScriptThread` is animting at once. Testing: This is covered by existing WPT tests as it mainly just improve animation efficiency in a particular case. Signed-off-by: Martin Robinson <mrobinson@igalia.com>
62 lines
1.8 KiB
Rust
62 lines
1.8 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/. */
|
|
|
|
//! This module contains the `EventLoop` type, which is the constellation's
|
|
//! view of a script thread. When an `EventLoop` is dropped, an `ExitScriptThread`
|
|
//! message is sent to the script thread, asking it to shut down.
|
|
|
|
use std::hash::Hash;
|
|
use std::marker::PhantomData;
|
|
use std::rc::Rc;
|
|
use std::sync::atomic::{AtomicUsize, Ordering};
|
|
|
|
use ipc_channel::Error;
|
|
use ipc_channel::ipc::IpcSender;
|
|
use script_traits::ScriptThreadMessage;
|
|
|
|
static CURRENT_EVENT_LOOP_ID: AtomicUsize = AtomicUsize::new(0);
|
|
|
|
/// <https://html.spec.whatwg.org/multipage/#event-loop>
|
|
pub struct EventLoop {
|
|
script_chan: IpcSender<ScriptThreadMessage>,
|
|
dont_send_or_sync: PhantomData<Rc<()>>,
|
|
id: usize,
|
|
}
|
|
|
|
impl PartialEq for EventLoop {
|
|
fn eq(&self, other: &Self) -> bool {
|
|
self.id == other.id
|
|
}
|
|
}
|
|
|
|
impl Eq for EventLoop {}
|
|
|
|
impl Hash for EventLoop {
|
|
fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
|
|
self.id.hash(state);
|
|
}
|
|
}
|
|
|
|
impl Drop for EventLoop {
|
|
fn drop(&mut self) {
|
|
let _ = self.script_chan.send(ScriptThreadMessage::ExitScriptThread);
|
|
}
|
|
}
|
|
|
|
impl EventLoop {
|
|
/// Create a new event loop from the channel to its script thread.
|
|
pub fn new(script_chan: IpcSender<ScriptThreadMessage>) -> Rc<EventLoop> {
|
|
let id = CURRENT_EVENT_LOOP_ID.fetch_add(1, Ordering::Relaxed);
|
|
Rc::new(EventLoop {
|
|
script_chan,
|
|
dont_send_or_sync: PhantomData,
|
|
id,
|
|
})
|
|
}
|
|
|
|
/// Send a message to the event loop.
|
|
pub fn send(&self, msg: ScriptThreadMessage) -> Result<(), Error> {
|
|
self.script_chan.send(msg)
|
|
}
|
|
}
|