[ty] Short-circuit inlayhints request if disabled in settings (#19963)

Author: MichaReiser

crates/ty_ide/src/inlay_hints.rs

@@ -85,6 +85,13 @@ pub struct InlayHintSettings {
     /// foo("x="1)
     /// ```
     pub call_argument_names: bool,
+    // Add any new setting that enables additional inlays to `any_enabled`.
+}
+
+impl InlayHintSettings {
+    pub fn any_enabled(&self) -> bool {
+        self.variable_types || self.call_argument_names
+    }
 }
 
 impl Default for InlayHintSettings {

crates/ty_server/src/server/api/requests/inlay_hints.rs

@@ -29,9 +29,9 @@ impl BackgroundDocumentRequestHandler for InlayHintRequestHandler {
         _client: &Client,
         params: InlayHintParams,
     ) -> crate::server::Result<Option<Vec<lsp_types::InlayHint>>> {
-        if snapshot
-            .workspace_settings()
-            .is_language_services_disabled()
+        let workspace_settings = snapshot.workspace_settings();
+        if workspace_settings.is_language_services_disabled()
+            || !workspace_settings.inlay_hints().any_enabled()
         {
             return Ok(None);
         }
@@ -47,7 +47,7 @@ impl BackgroundDocumentRequestHandler for InlayHintRequestHandler {
             .range
             .to_text_range(&source, &index, snapshot.encoding());
 
-        let inlay_hints = inlay_hints(db, file, range, snapshot.workspace_settings().inlay_hints());
+        let inlay_hints = inlay_hints(db, file, range, workspace_settings.inlay_hints());
 
         let inlay_hints = inlay_hints
             .into_iter()