7b0c7b6cb2
Stable rustfmt lacks a lot of features resulting in worse formatted code, thus use nightly formatter.
38 lines
1.1 KiB
Rust
38 lines
1.1 KiB
Rust
use wasm_bindgen::prelude::Closure;
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use wasm_bindgen::JsCast;
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use web_sys::EventTarget;
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pub struct EventListenerHandle<T: ?Sized> {
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target: EventTarget,
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event_type: &'static str,
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listener: Closure<T>,
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}
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impl<T: ?Sized> EventListenerHandle<T> {
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pub fn new<U>(target: U, event_type: &'static str, listener: Closure<T>) -> Self
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where
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U: Into<EventTarget>,
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{
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let target = target.into();
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target
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.add_event_listener_with_callback(event_type, listener.as_ref().unchecked_ref())
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.expect("Failed to add event listener");
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EventListenerHandle { target, event_type, listener }
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}
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}
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impl<T: ?Sized> Drop for EventListenerHandle<T> {
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fn drop(&mut self) {
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self.target
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.remove_event_listener_with_callback(
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self.event_type,
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self.listener.as_ref().unchecked_ref(),
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)
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.unwrap_or_else(|e| {
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web_sys::console::error_2(
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&format!("Error removing event listener {}", self.event_type).into(),
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&e,
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)
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});
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}
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}
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