cinny-desktop/src-tauri/src/lib.rs

#![cfg_attr(
    all(not(debug_assertions), target_os = "windows"),
    windows_subsystem = "windows"
)]

// mod menu;

use tauri::{webview::{NewWindowResponse, WebviewWindowBuilder}, WebviewUrl};
use tauri_plugin_opener::OpenerExt;

// Automatically grant camera and microphone permissions in WebView2 (Windows).
// macOS handles this via Info.plist; Windows requires an explicit PermissionRequested handler.
#[cfg(target_os = "windows")]
mod win_permissions {
    use webview2_com::Microsoft::Web::WebView2::Win32::{
        ICoreWebView2, ICoreWebView2PermissionRequestedEventArgs,
        ICoreWebView2PermissionRequestedEventHandler,
        ICoreWebView2PermissionRequestedEventHandler_Impl,
        COREWEBVIEW2_PERMISSION_KIND_CAMERA, COREWEBVIEW2_PERMISSION_KIND_MICROPHONE,
        COREWEBVIEW2_PERMISSION_STATE_ALLOW,
    };
    use windows::core::implement;

    #[implement(ICoreWebView2PermissionRequestedEventHandler)]
    pub struct PermissionHandler;

    impl ICoreWebView2PermissionRequestedEventHandler_Impl for PermissionHandler {
        fn Invoke(
            &self,
            _sender: Option<&ICoreWebView2>,
            args: Option<&ICoreWebView2PermissionRequestedEventArgs>,
        ) -> windows::core::Result<()> {
            if let Some(args) = args {
                let kind = unsafe { args.PermissionKind() }?;
                if kind == COREWEBVIEW2_PERMISSION_KIND_MICROPHONE
                    || kind == COREWEBVIEW2_PERMISSION_KIND_CAMERA
                {
                    unsafe { args.SetState(COREWEBVIEW2_PERMISSION_STATE_ALLOW) }?;
                }
            }
            Ok(())
        }
    }
}

pub fn run() {
    let port: u16 = 44548;
    let context = tauri::generate_context!();
    let builder = tauri::Builder::default();

    builder
        .plugin(tauri_plugin_localhost::Builder::new(port).build())
        .plugin(tauri_plugin_window_state::Builder::default().build())
        .plugin(tauri_plugin_opener::init())
        .setup(move |app| {
            #[cfg(debug_assertions)]
            let window_url = WebviewUrl::App(Default::default());

            #[cfg(not(debug_assertions))]
            let window_url = {
                let url = format!("http://localhost:{}", port).parse().unwrap();
                WebviewUrl::External(url)
            };

            let app_handle = app.handle().clone();
            let builder = WebviewWindowBuilder::new(app, "main".to_string(), window_url)
                .title("Cinny")
                .disable_drag_drop_handler()
                .on_new_window(move |url, _features| {
                    let _ = app_handle.opener().open_url(url.as_str(), None::<&str>);
                    NewWindowResponse::Deny
                });

            #[cfg(target_os = "windows")]
            let builder = builder.with_webview(|webview| {
                use webview2_com::Microsoft::Web::WebView2::Win32::ICoreWebView2PermissionRequestedEventHandler;
                use windows::core::EventRegistrationToken;
                use win_permissions::PermissionHandler;

                let controller = webview.controller();
                if let Ok(core) = unsafe { controller.CoreWebView2() } {
                    let handler: ICoreWebView2PermissionRequestedEventHandler =
                        PermissionHandler.into();
                    let mut token = EventRegistrationToken(0);
                    let _ = unsafe { core.add_PermissionRequested(&handler, &mut token) };
                    std::mem::forget(handler);
                }
            });

            builder.build()?;
            Ok(())
        })
        .run(context)
        .expect("error while building tauri application");
}