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aa08ee1148
Since we do not have persistent handle, I need to find a place to save the callback, so i save them in a property of the component
34 lines
1.1 KiB
Rust
34 lines
1.1 KiB
Rust
/*!
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Since neon do not allow to have Persistant handle, use this hack.
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*/
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use neon::prelude::*;
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pub struct PersistentContext<'a>(Handle<'a, JsArray>);
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const KEY: &'static str = "$__persistent_context";
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/// Since neon do not allow to have Persistant handle, this allocates property in an array.
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/// And this array is gonna be kept as a property somewhere.
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impl<'a> PersistentContext<'a> {
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pub fn new(cx: &mut impl Context<'a>) -> Self {
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PersistentContext(JsArray::new(cx, 0))
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}
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pub fn allocate(&self, cx: &mut impl Context<'a>, value: Handle<'a, JsValue>) -> u32 {
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let idx = self.0.len();
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self.0.set(cx, idx, value).unwrap();
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idx
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}
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pub fn get(&self, cx: &mut impl Context<'a>, idx: u32) -> JsResult<'a, JsValue> {
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self.0.get(cx, idx)
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}
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pub fn save_to_object(self, cx: &mut impl Context<'a>, o: Handle<'a, JsObject>) {
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o.set(cx, KEY, self.0).unwrap();
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}
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pub fn from_object(cx: &mut impl Context<'a>, o: Handle<'a, JsObject>) -> NeonResult<Self> {
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Ok(PersistentContext(o.get(cx, KEY)?.downcast_or_throw(cx)?))
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}
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}
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