More robust status notifications

crates/rust-analyzer/src/lsp_ext.rs

@@ -241,26 +241,26 @@ pub struct SsrParams {
     pub selections: Vec<lsp_types::Range>,
 }
 
-pub enum StatusNotification {}
+pub enum ServerStatusNotification {}
 
-#[derive(Serialize, Deserialize)]
+impl Notification for ServerStatusNotification {
+    type Params = ServerStatusParams;
+    const METHOD: &'static str = "experimental/serverStatus";
+}
+
+#[derive(Deserialize, Serialize, PartialEq, Eq, Clone)]
+pub struct ServerStatusParams {
+    pub health: Health,
+    pub quiescent: bool,
+    pub message: Option<String>,
+}
+
+#[derive(Serialize, Deserialize, Clone, Copy, PartialEq, Eq)]
 #[serde(rename_all = "camelCase")]
-pub enum Status {
-    Loading,
-    ReadyPartial,
-    Ready,
-    NeedsReload,
-    Invalid,
-}
-
-#[derive(Deserialize, Serialize)]
-pub struct StatusParams {
-    pub status: Status,
-}
-
-impl Notification for StatusNotification {
-    type Params = StatusParams;
-    const METHOD: &'static str = "rust-analyzer/status";
+pub enum Health {
+    Ok,
+    Warning,
+    Error,
 }
 
 pub enum CodeActionRequest {}