blob: 9d4248dd4620fcfca5fa87e3a9e2608fa2e354c2 [file] [log] [blame]
// Copyright (c) 2015, 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:source_map_stack_trace/source_map_stack_trace.dart' as mapper;
import 'package:source_maps/source_maps.dart';
import 'package:test_api/backend.dart' show StackTraceMapper;
/// A class for mapping JS stack traces to Dart stack traces using source maps.
class JSStackTraceMapper implements StackTraceMapper {
/// The parsed source map.
/// This is initialized lazily in `mapStackTrace()`.
Mapping? _mapping;
/// The same package resolution information as was passed to dart2js.
final Map<String, Uri>? _packageMap;
/// The URL of the SDK root from which dart2js loaded its sources.
final Uri? _sdkRoot;
/// The contents of the source map.
final String _mapContents;
/// The URL of the source map.
final Uri? _mapUrl;
{Uri? mapUrl, Map<String, Uri>? packageMap, Uri? sdkRoot})
: _mapUrl = mapUrl,
_packageMap = packageMap,
_sdkRoot = sdkRoot;
/// Converts [trace] into a Dart stack trace.
StackTrace mapStackTrace(StackTrace trace) {
var mapping = _mapping ??= parseExtended(_mapContents, mapUrl: _mapUrl);
return mapper.mapStackTrace(mapping, trace,
packageMap: _packageMap, sdkRoot: _sdkRoot);
/// Returns a Map representation which is suitable for JSON serialization.
Map<String, dynamic> serialize() {
return {
'mapContents': _mapContents,
'sdkRoot': _sdkRoot?.toString(),
'packageConfigMap': _serializePackageConfigMap(_packageMap),
'mapUrl': _mapUrl?.toString(),
/// Returns a [StackTraceMapper] contained in the provided serialized
/// representation.
static StackTraceMapper? deserialize(Map? serialized) {
if (serialized == null) return null;
var deserialized = _deserializePackageConfigMap(
(serialized['packageConfigMap'] as Map).cast<String, String>());
return JSStackTraceMapper(serialized['mapContents'] as String,
sdkRoot: Uri.parse(serialized['sdkRoot'] as String),
packageMap: deserialized,
mapUrl: Uri.parse(serialized['mapUrl'] as String));
/// Converts a [packageConfigMap] into a format suitable for JSON
/// serialization.
static Map<String, String>? _serializePackageConfigMap(
Map<String, Uri>? packageConfigMap) {
if (packageConfigMap == null) return null;
return, value) => MapEntry(key, '$value'));
/// Converts a serialized package config map into a format suitable for
/// the [PackageResolver]
static Map<String, Uri>? _deserializePackageConfigMap(
Map<String, String>? serialized) {
if (serialized == null) return null;
return, value) => MapEntry(key, Uri.parse(value)));