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Use
setTimeout trick instead of requestIdleCallback
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,124 +1,59 @@ | ||
| use once_cell::unsync::OnceCell; | ||
| use std::cell::Cell; | ||
| use std::rc::Rc; | ||
| use std::time::Duration; | ||
| use wasm_bindgen::closure::Closure; | ||
| use wasm_bindgen::prelude::wasm_bindgen; | ||
| use wasm_bindgen::JsCast; | ||
| use wasm_bindgen::JsValue; | ||
| use wasm_bindgen::{JsCast, JsValue}; | ||
| use web_sys::{MessageChannel, MessagePort}; | ||
|
|
||
| #[derive(Debug)] | ||
| pub struct Timeout { | ||
| window: web_sys::Window, | ||
| handle: i32, | ||
| _closure: Closure<dyn FnMut()>, | ||
| port: MessagePort, | ||
| _message_closure: Closure<dyn FnMut()>, | ||
| _timeout_closure: Closure<dyn FnMut()>, | ||
| } | ||
|
|
||
| impl Timeout { | ||
| pub fn new<F>(window: web_sys::Window, f: F, duration: Duration) -> Timeout | ||
| pub fn new<F>(window: web_sys::Window, f: F, duration: Option<Duration>) -> Timeout | ||
| where | ||
| F: 'static + FnMut(), | ||
| { | ||
| let closure = Closure::wrap(Box::new(f) as Box<dyn FnMut()>); | ||
|
|
||
| let handle = window | ||
| .set_timeout_with_callback_and_timeout_and_arguments_0( | ||
| closure.as_ref().unchecked_ref(), | ||
| let channel = MessageChannel::new().unwrap(); | ||
| let message_closure = Closure::new(f); | ||
| let port_1 = channel.port1(); | ||
| port_1 | ||
| .add_event_listener_with_callback("message", message_closure.as_ref().unchecked_ref()) | ||
| .expect("Failed to set message handler"); | ||
| port_1.start(); | ||
|
|
||
| let port_2 = channel.port2(); | ||
| let timeout_closure = Closure::new(move || { | ||
| port_2 | ||
| .post_message(&JsValue::UNDEFINED) | ||
| .expect("Failed to send message") | ||
| }); | ||
| let handle = if let Some(duration) = duration { | ||
| window.set_timeout_with_callback_and_timeout_and_arguments_0( | ||
| timeout_closure.as_ref().unchecked_ref(), | ||
| duration.as_millis() as i32, | ||
| ) | ||
| .expect("Failed to set timeout"); | ||
| } else { | ||
| window.set_timeout_with_callback(timeout_closure.as_ref().unchecked_ref()) | ||
| } | ||
| .expect("Failed to set timeout"); | ||
|
|
||
| Timeout { | ||
| window, | ||
| handle, | ||
| _closure: closure, | ||
| port: port_1, | ||
| _message_closure: message_closure, | ||
| _timeout_closure: timeout_closure, | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl Drop for Timeout { | ||
| fn drop(&mut self) { | ||
| self.window.clear_timeout_with_handle(self.handle); | ||
| self.port.close(); | ||
| } | ||
| } | ||
|
|
||
| #[derive(Debug)] | ||
| pub struct IdleCallback { | ||
| window: web_sys::Window, | ||
| handle: Handle, | ||
| fired: Rc<Cell<bool>>, | ||
| _closure: Closure<dyn FnMut()>, | ||
| } | ||
|
|
||
| #[derive(Clone, Copy, Debug)] | ||
| enum Handle { | ||
| IdleCallback(u32), | ||
| Timeout(i32), | ||
| } | ||
|
|
||
| impl IdleCallback { | ||
| pub fn new<F>(window: web_sys::Window, mut f: F) -> IdleCallback | ||
| where | ||
| F: 'static + FnMut(), | ||
| { | ||
| let fired = Rc::new(Cell::new(false)); | ||
| let c_fired = fired.clone(); | ||
| let closure = Closure::wrap(Box::new(move || { | ||
| (*c_fired).set(true); | ||
| f(); | ||
| }) as Box<dyn FnMut()>); | ||
|
|
||
| let handle = if has_idle_callback_support(&window) { | ||
| Handle::IdleCallback( | ||
| window | ||
| .request_idle_callback(closure.as_ref().unchecked_ref()) | ||
| .expect("Failed to request idle callback"), | ||
| ) | ||
| } else { | ||
| Handle::Timeout( | ||
| window | ||
| .set_timeout_with_callback(closure.as_ref().unchecked_ref()) | ||
| .expect("Failed to set timeout"), | ||
| ) | ||
| }; | ||
|
|
||
| IdleCallback { | ||
| window, | ||
| handle, | ||
| fired, | ||
| _closure: closure, | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl Drop for IdleCallback { | ||
| fn drop(&mut self) { | ||
| if !(*self.fired).get() { | ||
| match self.handle { | ||
| Handle::IdleCallback(handle) => self.window.cancel_idle_callback(handle), | ||
| Handle::Timeout(handle) => self.window.clear_timeout_with_handle(handle), | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| fn has_idle_callback_support(window: &web_sys::Window) -> bool { | ||
| thread_local! { | ||
| static IDLE_CALLBACK_SUPPORT: OnceCell<bool> = OnceCell::new(); | ||
| } | ||
|
|
||
| IDLE_CALLBACK_SUPPORT.with(|support| { | ||
| *support.get_or_init(|| { | ||
| #[wasm_bindgen] | ||
| extern "C" { | ||
| type IdleCallbackSupport; | ||
|
|
||
| #[wasm_bindgen(method, getter, js_name = requestIdleCallback)] | ||
| fn has_request_idle_callback(this: &IdleCallbackSupport) -> JsValue; | ||
| } | ||
|
|
||
| let support: &IdleCallbackSupport = window.unchecked_ref(); | ||
| !support.has_request_idle_callback().is_undefined() | ||
| }) | ||
| }) | ||
| } |