feat(menu): native File menu with New Book and Export

src-tauri/src/lib.rs

@@ -3,11 +3,37 @@ mod library;
 mod pdf;
 mod project;
 
+use tauri::menu::{Menu, MenuItemBuilder, PredefinedMenuItem, SubmenuBuilder};
+use tauri::{Emitter, Runtime};
+
+fn build_menu<R: Runtime>(handle: &tauri::AppHandle<R>) -> tauri::Result<Menu<R>> {
+    let menu = Menu::default(handle)?;
+    let new_book = MenuItemBuilder::with_id("new-book", "New Book")
+        .accelerator("CmdOrCtrl+N")
+        .build(handle)?;
+    let export_pdf = MenuItemBuilder::with_id("export-pdf", "Export as PDF…").build(handle)?;
+    let export_epub = MenuItemBuilder::with_id("export-epub", "Export as EPUB…").build(handle)?;
+    let file_submenu = SubmenuBuilder::new(handle, "File")
+        .item(&new_book)
+        .item(&PredefinedMenuItem::separator(handle)?)
+        .item(&export_pdf)
+        .item(&export_epub)
+        .build()?;
+    menu.insert(&file_submenu, 1)?;
+    Ok(menu)
+}
+
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
 pub fn run() {
     tauri::Builder::default()
         .plugin(tauri_plugin_opener::init())
         .plugin(tauri_plugin_dialog::init())
+        .menu(|handle| build_menu(handle))
+        .on_menu_event(|app, event| {
+            if matches!(event.id().0.as_str(), "new-book" | "export-pdf" | "export-epub") {
+                app.emit("menu-action", event.id().0.as_str()).ok();
+            }
+        })
         .invoke_handler(tauri::generate_handler![
             epub::package_epub,
             pdf::compile_pdf,