From eca2a73ad0e829dbd83da8f42a8a2bd5c17bbf75 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bla=C5=BE=20Hrastnik?= <blaz@mxxn.io>
Date: Tue, 16 Mar 2021 16:13:41 +0900
Subject: [PATCH] lsp: Pass through language_id on didOpenTextDocument.

---
 helix-lsp/src/client.rs    | 3 ++-
 helix-term/src/commands.rs | 1 +
 helix-view/src/editor.rs   | 7 +++++++
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/helix-lsp/src/client.rs b/helix-lsp/src/client.rs
index edec10a92..a9b7fe202 100644
--- a/helix-lsp/src/client.rs
+++ b/helix-lsp/src/client.rs
@@ -244,11 +244,12 @@ impl Client {
         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),
             },
diff --git a/helix-term/src/commands.rs b/helix-term/src/commands.rs
index 16f43591b..d80662d73 100644
--- a/helix-term/src/commands.rs
+++ b/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
diff --git a/helix-view/src/editor.rs b/helix-view/src/editor.rs
index f79eadad8..0dd0592c9 100644
--- a/helix-view/src/editor.rs
+++ b/helix-view/src/editor.rs
@@ -46,10 +46,17 @@ impl Editor {
         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();
         }