| // Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| import 'dart:async'; |
| |
| import 'package:analysis_server/lsp_protocol/protocol_generated.dart'; |
| import 'package:analysis_server/lsp_protocol/protocol_special.dart'; |
| import 'package:analysis_server/src/computer/computer_folding.dart'; |
| import 'package:analysis_server/src/lsp/handlers/handlers.dart'; |
| import 'package:analysis_server/src/lsp/lsp_analysis_server.dart'; |
| import 'package:analysis_server/src/lsp/mapping.dart'; |
| |
| class FoldingHandler |
| extends MessageHandler<FoldingRangeParams, List<FoldingRange>> { |
| FoldingHandler(LspAnalysisServer server) : super(server); |
| @override |
| Method get handlesMessage => Method.textDocument_foldingRange; |
| |
| @override |
| LspJsonHandler<FoldingRangeParams> get jsonHandler => |
| FoldingRangeParams.jsonHandler; |
| |
| @override |
| Future<ErrorOr<List<FoldingRange>>> handle( |
| FoldingRangeParams params, CancellationToken token) async { |
| if (!isDartDocument(params.textDocument)) { |
| return success(const []); |
| } |
| |
| final path = pathOfDoc(params.textDocument); |
| final unit = await path.mapResult(requireUnresolvedUnit); |
| |
| return unit.mapResult((unit) { |
| final lineInfo = unit.lineInfo; |
| final regions = DartUnitFoldingComputer(lineInfo, unit.unit).compute(); |
| |
| return success( |
| regions.map((region) => toFoldingRange(lineInfo, region)).toList(), |
| ); |
| }); |
| } |
| } |