fix(lsp): properly handle snippets on completions (#16274)

Fixes #15367

cli/Cargo.toml

@@ -105,7 +105,7 @@ text-size = "=1.1.0"
 text_lines = "=0.6.0"
 tokio = { version = "=1.21.1", features = ["full"] }
 tokio-util = "=0.7.4"
-tower-lsp = "=0.17.0"
+tower-lsp = { version = "=0.17.0", features = ["proposed"] }
 twox-hash = "=1.6.3"
 typed-arena = "=2.0.1"
 uuid = { version = "=1.1.2", features = ["v4", "serde"] }

cli/lsp/capabilities.rs

@@ -58,6 +58,7 @@ pub fn server_capabilities(
         ";".to_string(),
         "(".to_string(),
       ]),
+      completion_item: None,
       trigger_characters: Some(vec![
         ".".to_string(),
         "\"".to_string(),
@@ -140,5 +141,6 @@ pub fn server_capabilities(
       "denoConfigTasks": true,
       "testingApi":true,
     })),
+    inlay_hint_provider: None,
   }
 }

cli/lsp/config.rs

@@ -20,6 +20,7 @@ pub const SETTINGS_SECTION: &str = "deno";
 pub struct ClientCapabilities {
   pub code_action_disabled_support: bool,
   pub line_folding_only: bool,
+  pub snippet_support: bool,
   pub status_notification: bool,
   /// The client provides the `experimental.testingApi` capability, which is
   /// built around VSCode's testing API. It indicates that the server should
@@ -393,6 +394,16 @@ impl Config {
         .as_ref()
         .and_then(|it| it.disabled_support)
         .unwrap_or(false);
+      self.client_capabilities.snippet_support =
+        if let Some(completion) = &text_document.completion {
+          completion
+            .completion_item
+            .as_ref()
+            .and_then(|it| it.snippet_support)
+            .unwrap_or(false)
+        } else {
+          false
+        };
     }
   }
 

cli/lsp/language_server.rs

@@ -786,6 +786,7 @@ impl Inner {
     Ok(InitializeResult {
       capabilities,
       server_info: Some(server_info),
+      offset_encoding: None,
     })
   }
 
@@ -1777,6 +1778,7 @@ impl Inner {
         };
       let position =
         line_index.offset_tsc(params.text_document_position.position)?;
+      let use_snippets = self.config.client_capabilities.snippet_support;
       let req = tsc::RequestMethod::GetCompletions((
         specifier.clone(),
         position,
@@ -1792,10 +1794,12 @@ impl Inner {
               self.config.get_workspace_settings().suggest.auto_imports,
             ),
             include_completions_for_module_exports: Some(true),
-            include_completions_with_object_literal_method_snippets: Some(true),
-            include_completions_with_class_member_snippets: Some(true),
+            include_completions_with_object_literal_method_snippets: Some(
+              use_snippets,
+            ),
+            include_completions_with_class_member_snippets: Some(use_snippets),
             include_completions_with_insert_text: Some(true),
-            include_completions_with_snippet_text: Some(true),
+            include_completions_with_snippet_text: Some(use_snippets),
             jsx_attribute_completion_style: Some(
               tsc::JsxAttributeCompletionStyle::Auto,
             ),

cli/lsp/repl.rs

@@ -74,6 +74,7 @@ impl ReplLanguageServer {
           window: None,
           general: None,
           experimental: None,
+          offset_encoding: None,
         },
         trace: None,
         workspace_folders: None,

cli/lsp/tsc.rs

@@ -2196,6 +2196,10 @@ impl CompletionEntry {
         || kind == Some(lsp::CompletionItemKind::METHOD));
     let commit_characters = self.get_commit_characters(info, settings);
     let mut insert_text = self.insert_text.clone();
+    let insert_text_format = match self.is_snippet {
+      Some(true) => Some(lsp::InsertTextFormat::SNIPPET),
+      _ => None,
+    };
     let range = self.replacement_span.clone();
     let mut filter_text = self.get_filter_text();
     let mut tags = None;
@@ -2262,6 +2266,7 @@ impl CompletionEntry {
       text_edit,
       filter_text,
       insert_text,
+      insert_text_format,
       detail,
       tags,
       commit_characters,
@@ -2910,6 +2915,10 @@ pub struct UserPreferences {
   pub include_inlay_function_like_return_type_hints: Option<bool>,
   #[serde(skip_serializing_if = "Option::is_none")]
   pub include_inlay_enum_member_value_hints: Option<bool>,
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub allow_rename_of_import_path: Option<bool>,
+  #[serde(skip_serializing_if = "Option::is_none")]
+  pub auto_import_file_exclude_patterns: Option<Vec<String>>,
 }
 
 #[derive(Debug, Serialize)]

cli/tests/integration/lsp_tests.rs

@@ -3654,6 +3654,191 @@ fn lsp_completions_auto_import() {
   );
 }
 
+#[test]
+fn lsp_completions_snippet() {
+  let mut client = init("initialize_params.json");
+  did_open(
+    &mut client,
+    json!({
+      "textDocument": {
+        "uri": "file:///a/a.tsx",
+        "languageId": "typescriptreact",
+        "version": 1,
+        "text": "function A({ type }: { type: string }) {\n  return type;\n}\n\nfunction B() {\n  return <A t\n}",
+      }
+    }),
+  );
+  let (maybe_res, maybe_err) = client
+    .write_request(
+      "textDocument/completion",
+      json!({
+        "textDocument": {
+          "uri": "file:///a/a.tsx"
+        },
+        "position": {
+          "line": 5,
+          "character": 13,
+        },
+        "context": {
+          "triggerKind": 1,
+        }
+      }),
+    )
+    .unwrap();
+  assert!(maybe_err.is_none());
+  if let Some(lsp::CompletionResponse::List(list)) = maybe_res {
+    assert!(!list.is_incomplete);
+    assert_eq!(
+      json!(list),
+      json!({
+        "isIncomplete": false,
+        "items": [
+          {
+            "label": "type",
+            "kind": 5,
+            "sortText": "11",
+            "filterText": "type=\"$1\"",
+            "insertText": "type=\"$1\"",
+            "insertTextFormat": 2,
+            "commitCharacters": [
+              ".",
+              ",",
+              ";",
+              "("
+            ],
+            "data": {
+              "tsc": {
+                "specifier": "file:///a/a.tsx",
+                "position": 87,
+                "name": "type",
+                "useCodeSnippet": false
+              }
+            }
+          }
+        ]
+      })
+    );
+  } else {
+    panic!("unexpected completion response");
+  }
+  let (maybe_res, maybe_err) = client
+    .write_request(
+      "completionItem/resolve",
+      json!({
+        "label": "type",
+        "kind": 5,
+        "sortText": "11",
+        "filterText": "type=\"$1\"",
+        "insertText": "type=\"$1\"",
+        "insertTextFormat": 2,
+        "commitCharacters": [
+          ".",
+          ",",
+          ";",
+          "("
+        ],
+        "data": {
+          "tsc": {
+            "specifier": "file:///a/a.tsx",
+            "position": 87,
+            "name": "type",
+            "useCodeSnippet": false
+          }
+        }
+      }),
+    )
+    .unwrap();
+  assert!(maybe_err.is_none());
+  assert_eq!(
+    maybe_res,
+    Some(json!({
+      "label": "type",
+      "kind": 5,
+      "detail": "(property) type: string",
+      "documentation": {
+        "kind": "markdown",
+        "value": ""
+      },
+      "sortText": "11",
+      "filterText": "type=\"$1\"",
+      "insertText": "type=\"$1\"",
+      "insertTextFormat": 2,
+      "commitCharacters": [
+        ".",
+        ",",
+        ";",
+        "("
+      ]
+    }))
+  );
+}
+
+#[test]
+fn lsp_completions_no_snippet() {
+  let mut client = init("initialize_params_no_snippet.json");
+  did_open(
+    &mut client,
+    json!({
+      "textDocument": {
+        "uri": "file:///a/a.tsx",
+        "languageId": "typescriptreact",
+        "version": 1,
+        "text": "function A({ type }: { type: string }) {\n  return type;\n}\n\nfunction B() {\n  return <A t\n}",
+      }
+    }),
+  );
+  let (maybe_res, maybe_err) = client
+    .write_request(
+      "textDocument/completion",
+      json!({
+        "textDocument": {
+          "uri": "file:///a/a.tsx"
+        },
+        "position": {
+          "line": 5,
+          "character": 13,
+        },
+        "context": {
+          "triggerKind": 1,
+        }
+      }),
+    )
+    .unwrap();
+  assert!(maybe_err.is_none());
+  if let Some(lsp::CompletionResponse::List(list)) = maybe_res {
+    assert!(!list.is_incomplete);
+    assert_eq!(
+      json!(list),
+      json!({
+        "isIncomplete": false,
+        "items": [
+          {
+            "label": "type",
+            "kind": 5,
+            "sortText": "11",
+            "commitCharacters": [
+              ".",
+              ",",
+              ";",
+              "("
+            ],
+            "data": {
+              "tsc": {
+                "specifier": "file:///a/a.tsx",
+                "position": 87,
+                "name": "type",
+                "useCodeSnippet": false
+              }
+            }
+          }
+        ]
+      })
+    );
+  } else {
+    panic!("unexpected completion response");
+  }
+}
+
 #[test]
 fn lsp_completions_registry() {
   let _g = http_server();

cli/tests/testdata/lsp/initialize_params.json

@@ -56,6 +56,11 @@
           ]
         }
       },
+      "completion": {
+        "completionItem": {
+          "snippetSupport": true
+        }
+      },
       "foldingRange": {
         "lineFoldingOnly": true
       },