[clangd] Send suppported codeActionKinds to the client.

Summary:
This would make client know which codeActionKinds that clangd may
return.

VSCode will add a new entry "Refactor..." (which shows all
refactoring-kind code actions) in the right-click menu.

Reviewers: ilya-biryukov

Subscribers: MaskRay, jkorous, arphaman, kadircet, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D66592

llvm-svn: 369656

1 files changed, 11 insertions, 1 deletions

diff --git a/clang-tools-extra/clangd/ClangdLSPServer.cpp b/clang-tools-extra/clangd/ClangdLSPServer.cpp
index a838a90..928bd25 100644
--- a/clang-tools-extra/clangd/ClangdLSPServer.cpp
+++ b/clang-tools-extra/clangd/ClangdLSPServer.cpp
@@ -464,6 +464,16 @@ void ClangdLSPServer::onInitialize(const InitializeParams &Params,
   if (!Params.capabilities.RenamePrepareSupport) // Only boolean allowed per LSP
     RenameProvider = true;
 
+  // Per LSP, codeActionProvide can be either boolean or CodeActionOptions.
+  // CodeActionOptions is only valid if the client supports action literal
+  // via textDocument.codeAction.codeActionLiteralSupport.
+  llvm::json::Value CodeActionProvider = true;
+  if (Params.capabilities.CodeActionStructure)
+    CodeActionProvider = llvm::json::Object{
+        {"codeActionKinds",
+         {CodeAction::QUICKFIX_KIND, CodeAction::REFACTOR_KIND,
+          CodeAction::INFO_KIND}}};
+
   llvm::json::Object Result{
       {{"capabilities",
         llvm::json::Object{
@@ -475,7 +485,7 @@ void ClangdLSPServer::onInitialize(const InitializeParams &Params,
                  {"firstTriggerCharacter", "\n"},
                  {"moreTriggerCharacter", {}},
              }},
-            {"codeActionProvider", true},
+            {"codeActionProvider", std::move(CodeActionProvider)},
             {"completionProvider",
              llvm::json::Object{
                  {"resolveProvider", false},