1 files changed, 8 insertions, 3 deletions

diff --git a/editors/code/src/commands/syntax_tree.ts b/editors/code/src/commands/syntax_tree.ts
index 996c7a716..8d71cb39e 100644
--- a/editors/code/src/commands/syntax_tree.ts
+++ b/editors/code/src/commands/syntax_tree.ts
@@ -15,6 +15,9 @@ export function syntaxTree(ctx: Ctx): Cmd {
     void new AstInspector(ctx);
 
     ctx.pushCleanup(vscode.workspace.registerTextDocumentContentProvider(AST_FILE_SCHEME, tdcp));
+    ctx.pushCleanup(vscode.languages.setLanguageConfiguration("ra_syntax_tree", {
+        brackets: [["[", ")"]],
+    }));
 
     return async () => {
         const editor = vscode.window.activeTextEditor;
@@ -36,7 +39,7 @@ export function syntaxTree(ctx: Ctx): Cmd {
 }
 
 class TextDocumentContentProvider implements vscode.TextDocumentContentProvider {
-    readonly uri = vscode.Uri.parse('rust-analyzer://syntaxtree');
+    readonly uri = vscode.Uri.parse('rust-analyzer://syntaxtree/tree.rast');
     readonly eventEmitter = new vscode.EventEmitter<vscode.Uri>();
 
 
@@ -81,8 +84,10 @@ class TextDocumentContentProvider implements vscode.TextDocumentContentProvider
 // https://code.visualstudio.com/api/extension-guides/tree-view
 class AstInspector implements vscode.HoverProvider, Disposable {
     private static readonly astDecorationType = vscode.window.createTextEditorDecorationType({
-        fontStyle: "normal",
-        border: "#ffffff 1px solid",
+        borderColor: new vscode.ThemeColor('rust_analyzer.syntaxTreeBorder'),
+        borderStyle: "solid",
+        borderWidth: "2px",
+
     });
     private rustEditor: undefined | RustEditor;