80 lines
2.5 KiB
Rust
80 lines
2.5 KiB
Rust
use dioxus_html::document::{Document, EvalError, Evaluator};
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use generational_box::{AnyStorage, GenerationalBox, UnsyncStorage};
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use crate::{query::Query, DesktopContext};
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/// Represents the desktop-target's provider of evaluators.
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pub struct DesktopDocument {
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pub(crate) desktop_ctx: DesktopContext,
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}
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impl DesktopDocument {
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pub fn new(desktop_ctx: DesktopContext) -> Self {
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Self { desktop_ctx }
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}
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}
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impl Document for DesktopDocument {
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fn new_evaluator(&self, js: String) -> GenerationalBox<Box<dyn Evaluator>> {
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DesktopEvaluator::create(self.desktop_ctx.clone(), js)
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}
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fn set_title(&self, title: String) {
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self.desktop_ctx.window.set_title(&title);
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}
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fn as_any(&self) -> &dyn std::any::Any {
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self
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}
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}
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/// Represents a desktop-target's JavaScript evaluator.
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pub(crate) struct DesktopEvaluator {
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query: Query<serde_json::Value>,
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}
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impl DesktopEvaluator {
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/// Creates a new evaluator for desktop-based targets.
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pub fn create(desktop_ctx: DesktopContext, js: String) -> GenerationalBox<Box<dyn Evaluator>> {
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let ctx = desktop_ctx.clone();
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let query = desktop_ctx.query.new_query(&js, ctx);
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// We create a generational box that is owned by the query slot so that when we drop the query slot, the generational box is also dropped.
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let owner = UnsyncStorage::owner();
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let query_id = query.id;
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let query = owner.insert(Box::new(DesktopEvaluator { query }) as Box<dyn Evaluator>);
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desktop_ctx.query.active_requests.slab.borrow_mut()[query_id].owner = Some(owner);
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query
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}
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}
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impl Evaluator for DesktopEvaluator {
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fn poll_join(
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&mut self,
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cx: &mut std::task::Context<'_>,
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) -> std::task::Poll<Result<serde_json::Value, EvalError>> {
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self.query
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.poll_result(cx)
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.map_err(|e| EvalError::Communication(e.to_string()))
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}
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/// Sends a message to the evaluated JavaScript.
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fn send(&self, data: serde_json::Value) -> Result<(), EvalError> {
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if let Err(e) = self.query.send(data) {
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return Err(EvalError::Communication(e.to_string()));
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}
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Ok(())
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}
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/// Gets an UnboundedReceiver to receive messages from the evaluated JavaScript.
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fn poll_recv(
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&mut self,
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cx: &mut std::task::Context<'_>,
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) -> std::task::Poll<Result<serde_json::Value, EvalError>> {
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self.query
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.poll_recv(cx)
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.map_err(|e| EvalError::Communication(e.to_string()))
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}
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}
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