feat: add WebView::focus_parent method. (#1385)

Author: huacnlee

.changes/focus-parent.md

@@ -0,0 +1,5 @@
+---
+"wry": "patch:bug"
+---
+
+Add `WebView::focus_parent` method.

src/android/mod.rs

@@ -393,6 +393,11 @@ impl InnerWebView {
     // Unsupported
     Ok(())
   }
+
+  pub fn focus_parent(&self) -> Result<()> {
+    // Unsupported
+    Ok(())
+  }
 }
 
 #[derive(Clone, Copy)]

src/lib.rs

@@ -1613,6 +1613,15 @@ impl WebView {
   pub fn focus(&self) -> Result<()> {
     self.webview.focus()
   }
+
+  /// Try moving focus away from the webview back to the parent window.
+  ///
+  /// ## Platform-specific:
+  ///
+  /// - **Android**: Not implemented.
+  pub fn focus_parent(&self) -> Result<()> {
+    self.webview.focus_parent()
+  }
 }
 
 /// An event describing drag and drop operations on the webview.

src/webkitgtk/mod.rs

@@ -796,6 +796,14 @@ impl InnerWebView {
     Ok(())
   }
 
+  pub fn focus_parent(&self) -> Result<()> {
+    if let Some(window) = self.webview.parent_window() {
+      window.focus(gdk::ffi::GDK_CURRENT_TIME.try_into().unwrap_or(0));
+    }
+
+    Ok(())
+  }
+
   pub fn reparent<W>(&self, container: &W) -> Result<()>
   where
     W: gtk::prelude::IsA<gtk::Container>,

src/webview2/mod.rs

@@ -21,7 +21,7 @@ use windows::{
     Globalization::*,
     Graphics::Gdi::*,
     System::{Com::*, LibraryLoader::GetModuleHandleW, WinRT::EventRegistrationToken},
-    UI::{Shell::*, WindowsAndMessaging::*},
+    UI::{Input::KeyboardAndMouse::SetFocus, Shell::*, WindowsAndMessaging::*},
   },
 };
 
@@ -1315,6 +1315,17 @@ impl InnerWebView {
     }
   }
 
+  pub fn focus_parent(&self) -> Result<()> {
+    unsafe {
+      let parent = *self.parent.borrow();
+      if parent != HWND::default() {
+        SetFocus(parent)?;
+      }
+    }
+
+    Ok(())
+  }
+
   pub fn reparent(&self, parent: isize) -> Result<()> {
     let parent = HWND(parent as _);
 

src/wkwebview/mod.rs

@@ -112,6 +112,7 @@ pub(crate) struct InnerWebView {
   id: String,
   pub webview: Retained<WryWebView>,
   pub manager: Retained<WKUserContentController>,
+  ns_view: Retained<NSView>,
   #[allow(dead_code)]
   is_child: bool,
   pending_scripts: Arc<Mutex<Option<Vec<String>>>>,
@@ -460,6 +461,7 @@ impl InnerWebView {
         id: webview_id,
         webview: webview.clone(),
         manager: manager.clone(),
+        ns_view: ns_view.retain(),
         pending_scripts,
         ipc_handler_delegate,
         document_title_changed_observer,
@@ -805,6 +807,19 @@ r#"Object.defineProperty(window, 'ipc', {
     Ok(())
   }
 
+  pub fn focus_parent(&self) -> Result<()> {
+    if let Some(window) = self.webview.window() {
+      #[cfg(target_os = "macos")]
+      window.makeFirstResponder(Some(&self.ns_view));
+      #[cfg(target_os = "ios")]
+      unsafe {
+        window.becomeFirstResponder()
+      };
+    }
+
+    Ok(())
+  }
+
   #[cfg(target_os = "macos")]
   pub(crate) fn reparent(&self, window: *mut NSWindow) -> crate::Result<()> {
     unsafe {