pkg/analysis_server/lib/src/edit/preview/dart_file_page.dart

// 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 'package:analysis_server/src/edit/nnbd_migration/migration_info.dart';
import 'package:analysis_server/src/edit/nnbd_migration/unit_renderer.dart';
import 'package:analysis_server/src/edit/preview/preview_page.dart';
import 'package:analysis_server/src/edit/preview/preview_site.dart';

/// The page that is displayed when a preview of a valid Dart file is requested.
class DartFilePage extends PreviewPage {
  /// The information about the file being previewed.
  final UnitInfo unitInfo;

  /// Initialize a newly created Dart file page within the given [site]. The
  /// [unitInfo] provides the information needed to render the page.
  DartFilePage(PreviewSite site, this.unitInfo)
      // TODO(brianwilkerson) The path needs to be converted to use '/' if that
      //  isn't already done as part of building the unitInfo.
      : super(site, unitInfo.path.substring(1));

  @override
  void generateBody(Map<String, String> params) {
    throw UnsupportedError('generateBody');
  }

  @override
  Future<void> generatePage(Map<String, String> params) async {
    UnitRenderer renderer =
        UnitRenderer(unitInfo, site.migrationInfo, site.pathMapper);
    buf.write(renderer.render());
  }
}