feat(lsp): add support for lsp Diagnostic{}.data (#4935)

helix-core/src/diagnostic.rs

@@ -45,4 +45,5 @@ pub struct Diagnostic {
     pub code: Option<NumberOrString>,
     pub tags: Vec<DiagnosticTag>,
     pub source: Option<String>,
+    pub data: Option<serde_json::Value>,
 }

helix-lsp/src/lib.rs

@@ -102,16 +102,17 @@ pub fn diagnostic_to_lsp_diagnostic(
             None
         };
 
-        // TODO: add support for Diagnostic.data
-        lsp::Diagnostic::new(
-            range_to_lsp_range(doc, range, offset_encoding),
+        lsp::Diagnostic {
+            range: range_to_lsp_range(doc, range, offset_encoding),
             severity,
             code,
-            diag.source.clone(),
-            diag.message.to_owned(),
-            None,
+            source: diag.source.clone(),
+            message: diag.message.to_owned(),
+            related_information: None,
             tags,
-        )
+            data: diag.data.to_owned(),
+            ..Default::default()
+        }
     }
 
     /// Converts [`lsp::Position`] to a position in the document.

helix-term/src/application.rs

@@ -772,7 +772,8 @@ pub async fn handle_language_server_message(
                                         severity,
                                         code,
                                         tags,
-                                        source: diagnostic.source.clone()
+                                        source: diagnostic.source.clone(),
+                                        data: diagnostic.data.clone(),
                                     })
                                 })
                                 .collect();