feat: add .focus() to Webview

.changes/webview-focus.md

@@ -0,0 +1,5 @@
+---
+"wry": patch
+---
+- Add `focus` method to `Webview`
+- Add `WebviewExtWindows` trait with `on_focus` and `on_blur`

src/webview/mod.rs

@@ -344,6 +344,11 @@ impl WebView {
     self.webview.resize(self.window.hwnd())?;
     Ok(())
   }
+
+  /// Moves Focus to the Webview control.
+  pub fn focus(&self) {
+    self.webview.focus();
+  }
 }
 
 // Helper so all platforms handle RPC messages consistently.
@@ -458,6 +463,26 @@ pub fn webview_version() -> Result<String> {
   platform_webview_version()
 }
 
+#[cfg(target_os = "windows")]
+pub trait WebviewExtWindows {
+  /// Hook into webview2 got_focus event
+  fn on_focus(&self, f: impl Fn() + 'static);
+
+  /// Hook into webview2 lost_focus event
+  fn on_blur(&self, f: impl Fn() + 'static);
+}
+
+#[cfg(target_os = "windows")]
+impl WebviewExtWindows for WebView {
+  fn on_focus(&self, f: impl Fn() + 'static) {
+    self.webview.on_focus(f);
+  }
+
+  fn on_blur(&self, f: impl Fn() + 'static) {
+    self.webview.on_blur(f);
+  }
+}
+
 #[cfg(test)]
 mod tests {
   use super::*;

src/webview/webkitgtk/mod.rs

@@ -233,6 +233,10 @@ impl InnerWebView {
     }
     Ok(())
   }
+
+  pub fn focus(&self) {
+    self.webview.grab_focus();
+  }
 }
 
 pub fn platform_webview_version() -> Result<String> {

src/webview/webview2/win32/mod.rs

@@ -212,6 +212,7 @@ impl InnerWebView {
         }
 
         controller.put_is_visible(true)?;
+        controller.move_focus(webview2::MoveFocusReason::Programmatic)?;
         let _ = controller_clone.set(controller);
 
         if let Some(file_drop_handler) = attributes.file_drop_handler {
@@ -275,6 +276,29 @@ impl InnerWebView {
 
     Ok(())
   }
+
+  pub fn focus(&self) {
+    if let Some(c) = self.controller.get() {
+      let _ = c.move_focus(webview2::MoveFocusReason::Programmatic);
+    }
+  }
+  pub fn on_focus(&self, f: impl Fn() + 'static) {
+    if let Some(c) = self.controller.get() {
+      let _ = c.add_got_focus(move |_| {
+        f();
+        Ok(())
+      });
+    }
+  }
+
+  pub fn on_blur(&self, f: impl Fn() + 'static) {
+    if let Some(c) = self.controller.get() {
+      let _ = c.add_lost_focus(move |_| {
+        f();
+        Ok(())
+      });
+    }
+  }
 }
 
 pub fn platform_webview_version() -> Result<String> {

src/webview/wkwebview/mod.rs

@@ -391,6 +391,8 @@ impl InnerWebView {
       let () = msg_send![print_operation, runOperationModalForWindow: self.ns_window delegate: null::<*const c_void>() didRunSelector: null::<*const c_void>() contextInfo: null::<*const c_void>()];
     }
   }
+
+  pub fn focus(&self) {}
 }
 
 pub fn platform_webview_version() -> Result<String> {