refactor: remove unneeded focus code (#5065)

Co-authored-by: Lucas Nogueira <lucas@tauri.studio>

Author: amrbashir

.changes/windows-update.md

@@ -0,0 +1,8 @@
+---
+"tauri-runtime-wry": minor
+"tauri-runtime": minor
+"tauri-utils": minor
+"tauri": minor
+---
+
+Update windows to 0.39.0 and webview2-com to 0.19.1.

Cargo.toml

@@ -29,3 +29,6 @@ codegen-units = 1
 lto = true
 incremental = false
 opt-level = "s"
+
+[patch.crates-io]
+tao = { git = "https://github.com/tauri-apps/tao", branch = "dev" }

core/tauri-runtime-wry/Cargo.toml

@@ -13,18 +13,18 @@ exclude = [ "CHANGELOG.md", "/target" ]
 readme = "README.md"
 
 [dependencies]
-wry = { version = "0.20", default-features = false, features = [ "file-drop", "protocol" ] }
+wry = { git = "https://github.com/tauri-apps/wry", branch = "dev", default-features = false, features = [ "file-drop", "protocol" ] }
 tauri-runtime = { version = "0.10.2", path = "../tauri-runtime" }
 tauri-utils = { version = "1.0.3", path = "../tauri-utils" }
 uuid = { version = "1", features = [ "v4" ] }
 rand = "0.8"
 raw-window-handle = "0.5"
 
 [target."cfg(windows)".dependencies]
-webview2-com = "0.16.0"
+webview2-com = "0.19.1"
 
   [target."cfg(windows)".dependencies.windows]
-  version = "0.37.0"
+  version = "0.39.0"
   features = [ "Win32_Foundation" ]
 
 [target."cfg(any(target_os = \"linux\", target_os = \"dragonfly\", target_os = \"freebsd\", target_os = \"openbsd\", target_os = \"netbsd\"))".dependencies]

core/tauri-runtime-wry/src/lib.rs

@@ -2669,23 +2669,6 @@ fn handle_event_loop<T: UserEvent>(
       event, window_id, ..
     } => {
       if let Some(window_id) = webview_id_map.get(&window_id) {
-        // NOTE(amrbashir): we handle this event here instead of `match` statement below because
-        // we want to focus the webview as soon as possible, especially on windows.
-        if event == WryWindowEvent::Focused(true) {
-          let w = windows
-            .borrow()
-            .get(&window_id)
-            .and_then(|w| w.inner.clone());
-          if let Some(WindowHandle::Webview(webview)) = w {
-            // only focus the webview if the window is visible
-            // somehow tao is sending a Focused(true) event even when the window is invisible,
-            // which causes a deadlock: https://github.com/tauri-apps/tauri/issues/3534
-            if webview.window().is_visible() {
-              webview.focus();
-            }
-          }
-        }
-
         {
           let windows_ref = windows.borrow();
           if let Some(window) = windows_ref.get(&window_id) {
@@ -2980,7 +2963,7 @@ fn create_webview<T: UserEvent>(
     let mut token = EventRegistrationToken::default();
     unsafe {
       controller.add_GotFocus(
-        FocusChangedEventHandler::create(Box::new(move |_, _| {
+        &FocusChangedEventHandler::create(Box::new(move |_, _| {
           let _ = proxy_.send_event(Message::Webview(
             window_id,
             WebviewMessage::WebviewEvent(WebviewEvent::Focused(true)),
@@ -2993,7 +2976,7 @@ fn create_webview<T: UserEvent>(
     .unwrap();
     unsafe {
       controller.add_LostFocus(
-        FocusChangedEventHandler::create(Box::new(move |_, _| {
+        &FocusChangedEventHandler::create(Box::new(move |_, _| {
           let _ = proxy.send_event(Message::Webview(
             window_id,
             WebviewMessage::WebviewEvent(WebviewEvent::Focused(false)),

core/tauri-runtime/Cargo.toml

@@ -35,10 +35,10 @@ raw-window-handle = "0.5"
 rand = "0.8"
 
 [target."cfg(windows)".dependencies]
-webview2-com = "0.16.0"
+webview2-com = "0.19.1"
 
   [target."cfg(windows)".dependencies.windows]
-  version = "0.37.0"
+  version = "0.39.0"
   features = [ "Win32_Foundation" ]
 
 [target."cfg(any(target_os = \"linux\", target_os = \"dragonfly\", target_os = \"freebsd\", target_os = \"openbsd\", target_os = \"netbsd\"))".dependencies]

core/tauri-utils/Cargo.toml

@@ -40,9 +40,8 @@ semver = "1"
 heck = "0.4"
 
 [target."cfg(windows)".dependencies.windows]
-version = "0.37.0"
+version = "0.39.0"
 features = [
-  "alloc",
   "implement",
   "Win32_Foundation",
   "Win32_System_Com",

core/tauri-utils/src/platform.rs

@@ -202,11 +202,15 @@ pub use windows_platform::{is_windows_7, windows_version};
 
 #[cfg(windows)]
 mod windows_platform {
-  use windows::Win32::{
-    Foundation::FARPROC,
-    System::{
-      LibraryLoader::{GetProcAddress, LoadLibraryA},
-      SystemInformation::OSVERSIONINFOW,
+  use std::{iter::once, os::windows::prelude::OsStrExt};
+  use windows::{
+    core::{PCSTR, PCWSTR},
+    Win32::{
+      Foundation::FARPROC,
+      System::{
+        LibraryLoader::{GetProcAddress, LoadLibraryW},
+        SystemInformation::OSVERSIONINFOW,
+      },
     },
   };
 
@@ -221,11 +225,19 @@ mod windows_platform {
     false
   }
 
+  fn encode_wide(string: impl AsRef<std::ffi::OsStr>) -> Vec<u16> {
+    string.as_ref().encode_wide().chain(once(0)).collect()
+  }
+
+  // Helper function to dynamically load function pointer.
+  // `library` and `function` must be zero-terminated.
   fn get_function_impl(library: &str, function: &str) -> Option<FARPROC> {
-    assert_eq!(library.chars().last(), Some('\0'));
+    let library = encode_wide(library);
     assert_eq!(function.chars().last(), Some('\0'));
+    let function = PCSTR::from_raw(function.as_ptr());
 
-    let module = unsafe { LoadLibraryA(library) }.unwrap_or_default();
+    // Library names we will use are ASCII so we can use the A version to avoid string conversion.
+    let module = unsafe { LoadLibraryW(PCWSTR::from_raw(library.as_ptr())) }.unwrap_or_default();
     if module.is_invalid() {
       None
     } else {

core/tauri/Cargo.toml

@@ -107,11 +107,11 @@ cocoa = "0.24"
 objc = "0.2"
 
 [target."cfg(windows)".dependencies]
-webview2-com = "0.16.0"
+webview2-com = "0.19.1"
 win7-notifications = { version = "0.3.0", optional = true }
 
 [target."cfg(windows)".dependencies.windows]
-version = "0.37.0"
+version = "0.39.0"
 features = [ "Win32_Foundation" ]
 
 [build-dependencies]