wayland: Implement xdg-activation when opening urls (#11368)

Since Wayland doesn't have a way for windows to activate themselves,
currently, when you click on a link in Zed, the browser window opens in
the background.

This PR implements the `xdg-activation` protocol to get an activation
token, which the browser can use to raise its window.


https://github.com/zed-industries/zed/assets/71973804/8b3456c0-89f8-4201-b1cb-633a149796b7

Release Notes:

- N/A

crates/gpui/src/platform/linux/platform.rs

@@ -61,6 +61,7 @@ pub trait LinuxClient {
         options: WindowParams,
     ) -> Box<dyn PlatformWindow>;
     fn set_cursor_style(&self, style: CursorStyle);
+    fn open_uri(&self, uri: &str);
     fn write_to_primary(&self, item: ClipboardItem);
     fn write_to_clipboard(&self, item: ClipboardItem);
     fn read_from_primary(&self) -> Option<ClipboardItem>;
@@ -216,7 +217,7 @@ impl<P: LinuxClient + 'static> Platform for P {
     }
 
     fn open_url(&self, url: &str) {
-        open::that(url);
+        self.open_uri(url);
     }
 
     fn on_open_urls(&self, callback: Box<dyn FnMut(Vec<String>)>) {
@@ -484,6 +485,20 @@ impl<P: LinuxClient + 'static> Platform for P {
     }
 }
 
+pub(super) fn open_uri_internal(uri: &str, activation_token: Option<&str>) {
+    let mut last_err = None;
+    for mut command in open::commands(uri) {
+        if let Some(token) = activation_token {
+            command.env("XDG_ACTIVATION_TOKEN", token);
+        }
+        match command.status() {
+            Ok(_) => return,
+            Err(err) => last_err = Some(err),
+        }
+    }
+    log::error!("failed to open uri: {uri:?}, last error: {last_err:?}");
+}
+
 pub(super) fn is_within_click_distance(a: Point<Pixels>, b: Point<Pixels>) -> bool {
     let diff = a - b;
     diff.x.abs() <= DOUBLE_CLICK_DISTANCE && diff.y.abs() <= DOUBLE_CLICK_DISTANCE