Implement LSP `workspace/configuration` and `workspace/didChangeConfiguration` (#1684)

* Implement LSP `workspace/configuration` request

* Implement LSP `workspace/didChangeConfiguration` notification.

* Simplify retrieval of LSP configuration

* Implement suggestions from PR discussion

Co-authored-by: Triton171 <triton0171@gmail.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/helix-lsp/src/lib.rs b/helix-lsp/src/lib.rs
index 109546d0..389dfb4d 100644
--- a/helix-lsp/src/lib.rs
+++ b/helix-lsp/src/lib.rs
@@ -191,6 +191,7 @@ pub mod util {
 pub enum MethodCall {
     WorkDoneProgressCreate(lsp::WorkDoneProgressCreateParams),
     ApplyWorkspaceEdit(lsp::ApplyWorkspaceEditParams),
+    WorkspaceConfiguration(lsp::ConfigurationParams),
 }
 
 impl MethodCall {
@@ -209,6 +210,12 @@ impl MethodCall {
                     .expect("Failed to parse ApplyWorkspaceEdit params");
                 Self::ApplyWorkspaceEdit(params)
             }
+            lsp::request::WorkspaceConfiguration::METHOD => {
+                let params: lsp::ConfigurationParams = params
+                    .parse()
+                    .expect("Failed to parse WorkspaceConfiguration params");
+                Self::WorkspaceConfiguration(params)
+            }
             _ => {
                 log::warn!("unhandled lsp request: {}", method);
                 return None;