feat(rust): register plugins, global shortcut, commands

src-tauri/src/commands/overlay.rs

@@ -34,12 +34,14 @@ pub async fn apply_state<R: Runtime>(
         .set_ignore_cursor_events(new_state)
         .map_err(|e| e.to_string())?;
 
-    // Opacity dip half of the visual pulse. The JS click-through-toggled
+    // Opacity dip — visual pulse to signal the state change.
+    // Tauri 2.11 does not expose set_opacity on WebviewWindow, so we apply
+    // the dip by evaluating JS on the webview. The JS click-through-toggled
     // handler is responsible for restoring opacity to the user's actual
-    // target — Rust deliberately does NOT call set_opacity again, so there
-    // is no possibility of the global-shortcut path "snapping back" to a
-    // wrong value (we don't have a current-opacity getter).
-    let _ = overlay.set_opacity(0.4);
+    // target — Rust deliberately does NOT set opacity back, so there is no
+    // possibility of the global-shortcut path "snapping back" to a wrong
+    // value (we don't have a current-opacity getter).
+    let _ = overlay.eval("document.documentElement.style.opacity='0.4'");
     tokio::time::sleep(Duration::from_millis(180)).await;
 
     app.emit(
@@ -102,8 +104,9 @@ pub fn get_hotkey_status(app: AppHandle) -> Result<crate::HotkeyStatus, String>
     Ok(guard.clone())
 }
 
-/// Set window opacity. Tauri 2's JS WebviewWindow does NOT expose setOpacity
-/// (only the Rust side does), so the JS layer routes through this command.
+/// Set window opacity. Tauri 2's JS WebviewWindow does NOT expose setOpacity,
+/// so the JS layer routes through this command. Tauri 2.11 also doesn't expose
+/// set_opacity on the Rust WebviewWindow, so we apply the change via JS eval.
 #[tauri::command]
 pub fn set_window_opacity<R: Runtime>(
     app: AppHandle<R>,
@@ -113,5 +116,9 @@ pub fn set_window_opacity<R: Runtime>(
     let Some(window) = app.get_webview_window(&label) else {
         return Err(format!("window not found: {label}"));
     };
-    window.set_opacity(opacity).map_err(|e| e.to_string())
+    window
+        .eval(&format!(
+            "document.documentElement.style.opacity='{opacity}'"
+        ))
+        .map_err(|e| e.to_string())
 }

src-tauri/src/lib.rs

@@ -1,14 +1,95 @@
-// Learn more about Tauri commands at https://tauri.app/develop/calling-rust/
-#[tauri::command]
-fn greet(name: &str) -> String {
-    format!("Hello, {}! You've been greeted from Rust!", name)
+mod commands;
+
+use std::sync::Mutex;
+
+use serde::Serialize;
+use tauri::Manager;
+
+#[cfg(desktop)]
+use tauri_plugin_global_shortcut::{Code, GlobalShortcutExt, Modifiers, Shortcut, ShortcutState};
+
+pub struct AppState {
+    pub click_through: Mutex<bool>,
+    /// Hotkey registration outcome, set during setup. JS pulls this via
+    /// `get_hotkey_status` after the listener-not-yet-registered window is
+    /// safely past, so the result is never lost to a race.
+    pub hotkey_status: Mutex<HotkeyStatus>,
+}
+
+#[derive(Clone, Serialize, Default)]
+#[serde(tag = "kind", rename_all = "lowercase")]
+pub enum HotkeyStatus {
+    #[default]
+    Pending,
+    Ok,
+    Failed { error: String },
 }
 
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
 pub fn run() {
     tauri::Builder::default()
+        .manage(AppState {
+            click_through: Mutex::new(false),
+            hotkey_status: Mutex::new(HotkeyStatus::Pending),
+        })
         .plugin(tauri_plugin_opener::init())
-        .invoke_handler(tauri::generate_handler![greet])
+        .plugin(tauri_plugin_store::Builder::new().build())
+        .setup(|app| {
+            #[cfg(desktop)]
+            {
+                app.handle()
+                    .plugin(tauri_plugin_window_state::Builder::default().build())?;
+
+                let shortcut = Shortcut::new(
+                    Some(Modifiers::CONTROL | Modifiers::ALT),
+                    Code::Space,
+                );
+                let shortcut_for_handler = shortcut;
+
+                app.handle().plugin(
+                    tauri_plugin_global_shortcut::Builder::new()
+                        .with_handler(move |app, sc, event| {
+                            if sc != &shortcut_for_handler {
+                                return;
+                            }
+                            if event.state() != ShortcutState::Pressed {
+                                return;
+                            }
+                            let app_handle = app.clone();
+                            tauri::async_runtime::spawn(async move {
+                                if let Err(err) =
+                                    commands::overlay::toggle_via_global_shortcut(&app_handle).await
+                                {
+                                    eprintln!("global shortcut toggle failed: {err}");
+                                }
+                            });
+                        })
+                        .build(),
+                )?;
+
+                let registration_result = app.global_shortcut().register(shortcut);
+                let status = match &registration_result {
+                    Ok(()) => HotkeyStatus::Ok,
+                    Err(e) => {
+                        eprintln!("Failed to register Ctrl+Alt+Space: {e}");
+                        HotkeyStatus::Failed {
+                            error: "Hotkey unavailable — click-through escape disabled".to_string(),
+                        }
+                    }
+                };
+                {
+                    let state = app.state::<AppState>();
+                    *state.hotkey_status.lock().expect("poisoned") = status;
+                }
+            }
+            Ok(())
+        })
+        .invoke_handler(tauri::generate_handler![
+            commands::overlay::toggle_click_through,
+            commands::overlay::sync_click_through_cache,
+            commands::overlay::get_hotkey_status,
+            commands::overlay::set_window_opacity,
+        ])
         .run(tauri::generate_context!())
         .expect("error while running tauri application");
 }