Added app icon

Cargo.lock

@@ -2175,6 +2175,9 @@ name = "furumi-platform-desktop"
 version = "0.1.0"
 dependencies = [
  "core-foundation 0.10.1",
+ "objc2 0.6.4",
+ "objc2-app-kit 0.3.2",
+ "objc2-foundation 0.3.2",
  "rfd",
  "souvlaki",
  "windows-sys 0.61.2",

Cargo.toml

@@ -49,6 +49,13 @@ rodio = { version = "0.22.2", default-features = false, features = [
 ] }
 souvlaki = { version = "0.8.3", default-features = false, features = ["use_zbus"] }
 core-foundation = "0.10.1"
+objc2 = "0.6.4"
+objc2-app-kit = { version = "0.3.2", default-features = false, features = [
+    "NSApplication",
+    "NSImage",
+    "NSResponder",
+] }
+objc2-foundation = { version = "0.3.2", default-features = false, features = ["NSData"] }
 windows-sys = { version = "0.61.2", features = ["Win32_System_LibraryLoader", "Win32_UI_WindowsAndMessaging"] }
 
 furumi-application = { path = "crates/application" }

crates/platform-desktop/Cargo.toml

@@ -11,6 +11,9 @@ souvlaki.workspace = true
 
 [target.'cfg(target_os="macos")'.dependencies]
 core-foundation.workspace = true
+objc2.workspace = true
+objc2-app-kit.workspace = true
+objc2-foundation.workspace = true
 
 [target.'cfg(windows)'.dependencies]
 windows-sys.workspace = true

crates/platform-desktop/src/app.rs

@@ -0,0 +1,38 @@
+/// Applies the Furumi federation mark as the native application icon.
+///
+/// Slint forwards its window icon to Windows and X11. macOS deliberately
+/// ignores that window-level API, so its Dock icon is installed through
+/// `AppKit` from the same embedded SVG asset. On macOS this must be called
+/// from the main event loop after `applicationDidFinishLaunching`.
+pub fn set_application_icon() {
+    if let Err(error) = set_native_application_icon() {
+        eprintln!("failed to install the Furumi application icon: {error}");
+    }
+}
+
+#[cfg(target_os = "macos")]
+fn set_native_application_icon() -> Result<(), &'static str> {
+    use std::ffi::c_void;
+
+    use objc2::MainThreadMarker;
+    use objc2_app_kit::{NSApplication, NSImage};
+    use objc2_foundation::NSData;
+
+    let main_thread = MainThreadMarker::new().ok_or("not running on the macOS main thread")?;
+    let svg = include_bytes!("../../ui/assets/federation.svg");
+    // SAFETY: `dataWithBytes_length` copies `svg`; its pointer is valid for
+    // the complete duration of the Objective-C call.
+    let data = unsafe { NSData::dataWithBytes_length(svg.as_ptr().cast::<c_void>(), svg.len()) };
+    let icon = NSImage::initWithData(main_thread.alloc(), &data)
+        .ok_or("AppKit could not decode the embedded federation SVG")?;
+    let application = NSApplication::sharedApplication(main_thread);
+    // SAFETY: AppKit accepts a live NSImage here and retains it as the
+    // application's Dock icon. This function is restricted to the main thread.
+    unsafe { application.setApplicationIconImage(Some(&icon)) };
+    Ok(())
+}
+
+#[cfg(not(target_os = "macos"))]
+fn set_native_application_icon() -> Result<(), &'static str> {
+    Ok(())
+}

crates/platform-desktop/src/lib.rs

@@ -2,7 +2,9 @@
 
 use std::path::{Path, PathBuf};
 
+mod app;
 mod media;
+pub use app::set_application_icon;
 pub use media::{MediaCommand, MediaSession};
 
 /// Opens the platform-native directory picker.

crates/ui/src/lib.rs

@@ -50,6 +50,13 @@ pub fn run(backend: &BackendHandle) -> Result<(), slint::PlatformError> {
     let window = AppWindow::new()?;
     let state = Arc::new(Mutex::new(AppState::default()));
 
+    // Winit completes NSApplication initialization only after entering the
+    // event loop. AppKit discards a Dock icon assigned before that point.
+    #[cfg(target_os = "macos")]
+    slint::Timer::single_shot(std::time::Duration::ZERO, || {
+        furumi_platform_desktop::set_application_icon();
+    });
+
     let media_backend = backend.clone();
     MEDIA_SESSION.with_borrow_mut(|session| {
         *session = MediaSession::new(move |command| {

crates/ui/ui/app.slint

@@ -4,6 +4,7 @@ import { AlbumGrid, ArtistGrid, ArtistLinksRow, BuildInfoCard, DeviceRow, Federa
 
 export component AppWindow inherits Window {
     title: "Furumi Desktop";
+    icon: @image-url("../assets/federation.svg");
     preferred-width: 1180px;
     preferred-height: 760px;
     min-width: 920px;