refactor(lsp): optimise static assets (#8771)

Fixes #8158

2 files changed, 16 insertions, 0 deletions

diff --git a/cli/tsc/99_main_compiler.js b/cli/tsc/99_main_compiler.js
index a78b85203..0be0fdc2c 100644
--- a/cli/tsc/99_main_compiler.js
+++ b/cli/tsc/99_main_compiler.js
@@ -487,6 +487,16 @@ delete Object.prototype.__proto__;
         compilationSettings = options;
         return respond(id, true);
       }
+      case "getAsset": {
+        const sourceFile = host.getSourceFile(
+          request.specifier,
+          ts.ScriptTarget.ESNext,
+        );
+        return core.jsonOpSync(
+          "op_set_asset",
+          { text: sourceFile && sourceFile.text },
+        );
+      }
       case "getSemanticDiagnostics": {
         const diagnostics = languageService.getSemanticDiagnostics(
           request.specifier,
diff --git a/cli/tsc/compiler.d.ts b/cli/tsc/compiler.d.ts
index a1f4e851c..39afbe884 100644
--- a/cli/tsc/compiler.d.ts
+++ b/cli/tsc/compiler.d.ts
@@ -42,6 +42,7 @@ declare global {
 
   type LanguageServerRequest =
     | ConfigureRequest
+    | GetAsset
     | GetSyntacticDiagnosticsRequest
     | GetSemanticDiagnosticsRequest
     | GetSuggestionDiagnosticsRequest
@@ -62,6 +63,11 @@ declare global {
     compilerOptions: Record<string, any>;
   }
 
+  interface GetAsset extends BaseLanguageServerRequest {
+    method: "getAsset";
+    specifier: string;
+  }
+
   interface GetSyntacticDiagnosticsRequest extends BaseLanguageServerRequest {
     method: "getSyntacticDiagnostics";
     specifier: string;