internal/lsp: make ShowDocument RPC available to gopls

The window/showDocument RPC is now correctly classified as being
sent from the server to the client.

Change-Id: I659528af69662fb709242d326563d52070fd5702
Reviewed-on: https://go-review.googlesource.com/c/tools/+/315990
Run-TryBot: Peter Weinberger <pjw@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Peter Weinberger <pjw@google.com>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>

internal/lsp/cmd/cmd.go

@@ -443,6 +443,10 @@ func (c *cmdClient) Progress(context.Context, *protocol.ProgressParams) error {
 	return nil
 }
 
+func (c *cmdClient) ShowDocument(context.Context, *protocol.ShowDocumentParams) (*protocol.ShowDocumentResult, error) {
+	return nil, nil
+}
+
 func (c *cmdClient) WorkDoneProgressCreate(context.Context, *protocol.WorkDoneProgressCreateParams) error {
 	return nil
 }

internal/lsp/fake/client.go

@@ -111,6 +111,10 @@ func (c *Client) WorkDoneProgressCreate(ctx context.Context, params *protocol.Wo
 	return nil
 }
 
+func (c *Client) ShowDocument(context.Context, *protocol.ShowDocumentParams) (*protocol.ShowDocumentResult, error) {
+	return nil, nil
+}
+
 // ApplyEdit applies edits sent from the server.
 func (c *Client) ApplyEdit(ctx context.Context, params *protocol.ApplyWorkspaceEditParams) (*protocol.ApplyWorkspaceEditResponse, error) {
 	if len(params.Edit.Changes) != 0 {

internal/lsp/protocol/typescript/code.ts

@@ -135,6 +135,7 @@ function setReceives() {
   receives.set('workspace/applyEdit', 'client');
   receives.set('textDocument/publishDiagnostics', 'client');
   receives.set('window/workDoneProgress/create', 'client');
+  receives.set('window/showDocument', 'client');
   receives.set('$/progress', 'client');
   // a small check
   receives.forEach((_, k) => {

internal/lsp/server_gen.go

@@ -228,10 +228,6 @@ func (s *Server) SetTrace(context.Context, *protocol.SetTraceParams) error {
 	return notImplemented("SetTrace")
 }
 
-func (s *Server) ShowDocument(context.Context, *protocol.ShowDocumentParams) (*protocol.ShowDocumentResult, error) {
-	return nil, notImplemented("ShowDocument")
-}
-
 func (s *Server) Shutdown(ctx context.Context) error {
 	return s.shutdown(ctx)
 }