Merge pull request #318 from overlisted/eval-stuff

Eval stuff

packages/desktop/src/desktop_context.rs

@@ -119,6 +119,11 @@ impl DesktopContext {
     pub fn devtool(&self) {
         let _ = self.proxy.send_event(DevTool);
     }
+
+    /// run (evaluate) a script in the WebView context
+    pub fn eval(&self, script: impl std::string::ToString) {
+        let _ = self.proxy.send_event(Eval(script.to_string()));
+    }
 }
 
 #[derive(Debug)]
@@ -144,6 +149,8 @@ pub enum UserWindowEvent {
     SetDecorations(bool),
 
     DevTool,
+
+    Eval(String),
 }
 
 pub(super) fn handler(
@@ -185,5 +192,16 @@ pub(super) fn handler(
         SetDecorations(state) => window.set_decorations(state),
 
         DevTool => webview.devtool(),
+
+        Eval(code) => webview
+            .evaluate_script(code.as_str())
+            .expect("eval shouldn't panic"),
     }
 }
+
+/// Get a closure that executes any JavaScript in the WebView context.
+pub fn use_eval<S: std::string::ToString>(cx: &ScopeState) -> &dyn Fn(S) {
+    let desktop = use_window(&cx).clone();
+
+    cx.use_hook(|_| move |script| desktop.eval(script))
+}

packages/desktop/src/lib.rs

@@ -11,7 +11,7 @@ mod events;
 mod protocol;
 
 use desktop_context::UserWindowEvent;
-pub use desktop_context::{use_window, DesktopContext};
+pub use desktop_context::{use_eval, use_window, DesktopContext};
 pub use wry;
 pub use wry::application as tao;