| // 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:webkit_inspection_protocol/webkit_inspection_protocol.dart'; |
| |
| import '../debugging/classes.dart'; |
| import '../debugging/inspector.dart'; |
| import '../services/chrome_proxy_service.dart'; |
| import '../utilities/shared.dart'; |
| import '../utilities/wrapped_service.dart'; |
| import 'remote_debugger.dart'; |
| |
| /// Meta data for a remote Dart class in Chrome. |
| class ClassMetaData { |
| /// The name of the JS constructor for the object. |
| /// |
| /// This may be a constructor for a Dart, but it's still a JS name. For |
| /// example, 'Number', 'JSArray', 'Object'. |
| final String jsName; |
| |
| /// The length of the object, if applicable. |
| final int length; |
| |
| /// The dart type name for the object. |
| /// |
| /// For example, 'int', 'List<String>', 'Null' |
| final String dartName; |
| |
| /// The library identifier, which is the URI of the library. |
| final String libraryId; |
| |
| factory ClassMetaData( |
| {Object jsName, Object libraryId, Object dartName, Object length}) { |
| return ClassMetaData._(jsName as String, libraryId as String, |
| dartName as String, length as int); |
| } |
| |
| ClassMetaData._(this.jsName, this.libraryId, this.dartName, this.length); |
| |
| /// Returns the ID of the class. |
| /// |
| /// Takes the form of 'libraryId:name'. |
| String get id => '$libraryId:$jsName'; |
| |
| /// Returns the [ClassMetaData] for the Chrome [remoteObject]. |
| /// |
| /// Returns null if the [remoteObject] is not a Dart class. |
| static Future<ClassMetaData> metaDataFor(RemoteDebugger remoteDebugger, |
| RemoteObject remoteObject, AppInspector inspector) async { |
| try { |
| var evalExpression = ''' |
| function(arg) { |
| const sdkUtils = $loadModule('dart_sdk').dart; |
| const classObject = sdkUtils.getReifiedType(arg); |
| const isFunction = sdkUtils.AbstractFunctionType.is(classObject); |
| const result = {}; |
| result['name'] = isFunction ? 'Function' : classObject.name; |
| result['dartName'] = sdkUtils.typeName(classObject); |
| result['length'] = arg['length']; |
| result['libraryId'] = sdkUtils.getLibraryUri(classObject); |
| return result; |
| } |
| '''; |
| var result = await inspector.jsCallFunctionOn( |
| remoteObject, evalExpression, [remoteObject], |
| returnByValue: true); |
| var metadata = result.value as Map; |
| return ClassMetaData( |
| jsName: metadata['name'], |
| libraryId: metadata['libraryId'], |
| dartName: metadata['dartName'], |
| length: metadata['length']); |
| } on ChromeDebugException { |
| return null; |
| } |
| } |
| |
| /// Return a [ClassRef] appropriate to this metadata. |
| ClassRef get classRef => classRefFor(libraryId, dartName); |
| } |
| |
| /// Meta data for a remote Dart function in Chrome. |
| class FunctionMetaData { |
| final String name; |
| FunctionMetaData(this.name); |
| |
| /// Returns the [FunctionMetaData] for the Chrome [remoteObject]. |
| static Future<FunctionMetaData> metaDataFor( |
| RemoteDebugger remoteDebugger, RemoteObject remoteObject) async { |
| var evalExpression = ''' |
| function(remoteObject) { |
| var sdkUtils = $loadModule('dart_sdk').dart; |
| var name = remoteObject.name; |
| if(remoteObject._boundObject) { |
| name = sdkUtils.getType(remoteObject._boundObject).name + |
| '.' + remoteObject._boundMethod.name; |
| } |
| return name; |
| } |
| '''; |
| var arguments = [ |
| {'objectId': remoteObject.objectId} |
| ]; |
| var response = |
| await remoteDebugger.sendCommand('Runtime.callFunctionOn', params: { |
| 'functionDeclaration': evalExpression, |
| 'arguments': arguments, |
| 'objectId': remoteObject.objectId, |
| 'returnByValue': true, |
| }); |
| handleErrorIfPresent( |
| response, |
| evalContents: evalExpression, |
| ); |
| var name = response.result['result']['value'] as String; |
| if (name.isEmpty) name = 'Closure'; |
| return FunctionMetaData(name); |
| } |
| } |