Convert use_eval to use send/recv system (#1080)

* progress: reworked don't run this, it'll kill your web browser * feat: use_eval but with comms * revision: async recv & recv_sync * revision: use_eval * revision: standard eval interface * revision: use serde_json::Value instead of JsValue * revision: docs * revision: error message * create: desktop eval (wip) * fix: desktop eval * revision: wrap use_eval in Rc<RefCell<_>> * fix: fmt, clippy * fix: desktop tests * revision: change to channel system - fixes clippy errors - fixes playwright tests * fix: tests * fix: eval example * fix: fmt * fix: tests, desktop stuff * fix: tests * feat: drop handler * fix: tests * fix: rustfmt * revision: web promise/callback system * fix: recv error * revision: IntoFuture, functionation * fix: ci * revision: playwright web * remove: unescessary code * remove dioxus-html from public examples * prototype-patch * fix web eval * fix: rustfmt * fix: CI * make use_eval more efficient * implement eval for liveview as well * fix playwright tests * fix clippy * more clippy fixes * fix clippy * fix stack overflow * fix desktop mock * fix clippy --------- Co-authored-by: Evan Almloff <evanalmloff@gmail.com>
2023-07-21 17:36:25 -05:00
1 parent b36a7a3993
commit 6210c6fefe
@@ -0,0 +1,75 @@
+#![allow(clippy::await_holding_refcell_ref)]
+
+use async_trait::async_trait;
+use dioxus_core::ScopeState;
+use dioxus_html::prelude::{EvalError, EvalProvider, Evaluator};
+use std::{cell::RefCell, rc::Rc};
+
+use crate::query::{Query, QueryEngine};
+
+/// Provides the DesktopEvalProvider through [`cx.provide_context`].
+pub fn init_eval(cx: &ScopeState) {
+    let query = cx.consume_context::<QueryEngine>().unwrap();
+    let provider: Rc<dyn EvalProvider> = Rc::new(DesktopEvalProvider { query });
+    cx.provide_context(provider);
+}
+
+/// Reprents the desktop-target's provider of evaluators.
+pub struct DesktopEvalProvider {
+    query: QueryEngine,
+}
+
+impl EvalProvider for DesktopEvalProvider {
+    fn new_evaluator(&self, js: String) -> Result<Rc<dyn Evaluator>, EvalError> {
+        Ok(Rc::new(DesktopEvaluator::new(self.query.clone(), js)))
+    }
+}
+
+/// Reprents a desktop-target's JavaScript evaluator.
+pub(crate) struct DesktopEvaluator {
+    query: Rc<RefCell<Query<serde_json::Value>>>,
+}
+
+impl DesktopEvaluator {
+    /// Creates a new evaluator for desktop-based targets.
+    pub fn new(query: QueryEngine, js: String) -> Self {
+        let query = query.new_query(&js);
+
+        Self {
+            query: Rc::new(RefCell::new(query)),
+        }
+    }
+}
+
+#[async_trait(?Send)]
+impl Evaluator for DesktopEvaluator {
+    /// # Panics
+    /// This will panic if the query is currently being awaited.
+    async fn join(&self) -> Result<serde_json::Value, EvalError> {
+        self.query
+            .borrow_mut()
+            .result()
+            .await
+            .map_err(|e| EvalError::Communication(e.to_string()))
+    }
+
+    /// Sends a message to the evaluated JavaScript.
+    fn send(&self, data: serde_json::Value) -> Result<(), EvalError> {
+        if let Err(e) = self.query.borrow_mut().send(data) {
+            return Err(EvalError::Communication(e.to_string()));
+        }
+        Ok(())
+    }
+
+    /// Gets an UnboundedReceiver to receive messages from the evaluated JavaScript.
+    ///
+    /// # Panics
+    /// This will panic if the query is currently being awaited.
+    async fn recv(&self) -> Result<serde_json::Value, EvalError> {
+        self.query
+            .borrow_mut()
+            .recv()
+            .await
+            .map_err(|e| EvalError::Communication(e.to_string()))
+    }
+}