33 lines
1.2 KiB
Rust
33 lines
1.2 KiB
Rust
use crate::ipc::UserWindowEvent;
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use futures_util::task::ArcWake;
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use std::sync::Arc;
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use tao::{event_loop::EventLoopProxy, window::WindowId};
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/// Create a waker that will send a poll event to the event loop.
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///
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/// This lets the VirtualDom "come up for air" and process events while the main thread is blocked by the WebView.
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///
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/// All IO and multithreading lives on other threads. Thanks to tokio's work stealing approach, the main thread can never
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/// claim a task while it's blocked by the event loop.
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pub fn tao_waker(proxy: EventLoopProxy<UserWindowEvent>, id: WindowId) -> std::task::Waker {
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struct DomHandle {
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proxy: EventLoopProxy<UserWindowEvent>,
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id: WindowId,
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}
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// this should be implemented by most platforms, but ios is missing this until
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// https://github.com/tauri-apps/wry/issues/830 is resolved
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unsafe impl Send for DomHandle {}
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unsafe impl Sync for DomHandle {}
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impl ArcWake for DomHandle {
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fn wake_by_ref(arc_self: &Arc<Self>) {
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_ = arc_self
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.proxy
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.send_event(UserWindowEvent::Poll(arc_self.id));
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}
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}
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futures_util::task::waker(Arc::new(DomHandle { id, proxy }))
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}
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