lsp: Pass through language_id on didOpenTextDocument.

helix-lsp/src/client.rs

@@ -244,11 +244,12 @@ pub async fn text_document_did_open(
         uri: lsp::Url,
         version: i32,
         doc: &Rope,
+        language_id: String,
     ) -> Result<()> {
         self.notify::<lsp::notification::DidOpenTextDocument>(lsp::DidOpenTextDocumentParams {
             text_document: lsp::TextDocumentItem {
                 uri,
-                language_id: "rust".to_string(), // TODO: hardcoded for now
+                language_id,
                 version,
                 text: String::from(doc),
             },

helix-term/src/commands.rs

@@ -1183,6 +1183,7 @@ pub fn completion(cx: &mut Context) {
     let pos = helix_lsp::util::pos_to_lsp_pos(doc.text().slice(..), doc.selection().cursor());
 
     // TODO: handle fails
+
     let res = smol::block_on(language_server.completion(doc.identifier(), pos)).unwrap_or_default();
 
     // TODO: if no completion, show some message or something

helix-view/src/editor.rs

@@ -46,10 +46,17 @@ pub fn open(&mut self, path: PathBuf, executor: &smol::Executor) -> Result<(), E
         if let Some(language_server) = language_server {
             doc.set_language_server(Some(language_server.clone()));
 
+            let language_id = doc
+                .language()
+                .and_then(|s| s.split(".").last()) // source.rust
+                .map(ToOwned::to_owned)
+                .unwrap_or_default();
+
             smol::block_on(language_server.text_document_did_open(
                 doc.url().unwrap(),
                 doc.version(),
                 doc.text(),
+                language_id,
             ))
             .unwrap();
         }