feat: add mvp language server (#8515)

Resolves #8400

1 files changed, 26 insertions, 0 deletions

diff --git a/cli/lsp/lsp_extensions.rs b/cli/lsp/lsp_extensions.rs
new file mode 100644
index 000000000..eb0a62464
--- /dev/null
+++ b/cli/lsp/lsp_extensions.rs
@@ -0,0 +1,26 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+
+///!
+///! Extensions to the language service protocol that are specific to Deno.
+///!
+use deno_core::serde::Deserialize;
+use deno_core::serde::Serialize;
+use lsp_types::request::Request;
+use lsp_types::TextDocumentIdentifier;
+
+#[derive(Debug, Deserialize, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct VirtualTextDocumentParams {
+  pub text_document: TextDocumentIdentifier,
+}
+
+/// Request a _virtual_ text document from the server. Used for example to
+/// provide a status document of the language server which can be viewed in the
+/// IDE.
+pub enum VirtualTextDocument {}
+
+impl Request for VirtualTextDocument {
+  type Params = VirtualTextDocumentParams;
+  type Result = String;
+  const METHOD: &'static str = "deno/virtualTextDocument";
+}