feat(macos): support to change tray icon aspect ratio, close #564 (#565)

* feat(macos): support to change tray icon aspect ratio, close #564

* chore: add changes file

* fix(macos): use icon aspect ratio

* chore: changes file

.changes/macos-tray-icon-aspect-ratio.md

@@ -0,0 +1,5 @@
+---
+"tao": "patch"
+---
+
+Scale the tray icon according to its aspect ratio on macOS.

src/platform_impl/macos/icon.rs

@@ -13,6 +13,10 @@ impl PlatformIcon {
     Ok(PlatformIcon(RgbaIcon::from_rgba(rgba, width, height)?))
   }
 
+  pub fn get_size(&self) -> (u32, u32) {
+    (self.0.width, self.0.height)
+  }
+
   pub fn to_png(&self) -> Vec<u8> {
     let mut png = Vec::new();
 

src/platform_impl/macos/system_tray.rs

@@ -166,13 +166,16 @@ impl SystemTray {
   }
 
   fn create_button_with_icon(&self) {
-    const ICON_WIDTH: f64 = 18.0;
-    const ICON_HEIGHT: f64 = 18.0;
     // The image is to the right of the title https://developer.apple.com/documentation/appkit/nscellimageposition/nsimageleft
     const NSIMAGE_LEFT: i32 = 2;
 
     let icon = self.icon.inner.to_png();
 
+    let (width, height) = self.icon.inner.get_size();
+
+    let icon_height: f64 = 18.0;
+    let icon_width: f64 = (width as f64) / (height as f64 / icon_height);
+
     unsafe {
       let status_item = self.ns_status_bar;
       let button = status_item.button();
@@ -185,7 +188,7 @@ impl SystemTray {
       );
 
       let nsimage = NSImage::initWithData_(NSImage::alloc(nil), nsdata);
-      let new_size = NSSize::new(ICON_WIDTH, ICON_HEIGHT);
+      let new_size = NSSize::new(icon_width, icon_height);
 
       button.setImage_(nsimage);
       let _: () = msg_send![nsimage, setSize: new_size];