Make the dart:developer library available in DDC so debugger statement works

pkg/dev_compiler/tool/input_sdk/lib/developer/extension.dart

+// 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.
+
+part of dart.developer;
+
+/// A response to a service protocol extension RPC.
+///
+/// If the RPC was successful, use [ServiceExtensionResponse.result], otherwise
+/// use [ServiceExtensionResponse.error].
+class ServiceExtensionResponse {
+  final String _result;
+  final int _errorCode;
+  final String _errorDetail;
+
+  /// Creates a successful response to a service protocol extension RPC.
+  ///
+  /// Requires [result] to be a JSON object encoded as a string. When forming
+  /// the JSON-RPC message [result] will be inlined directly.
+  ServiceExtensionResponse.result(String result)
+      : _result = result,
+        _errorCode = null,
+        _errorDetail = null {
+    if (_result is! String) {
+      throw new ArgumentError.value(_result, "result", "Must be a String");
+    }
+  }
+
+  /// Creates an error response to a service protocol extension RPC.
+  ///
+  /// Requires [errorCode] to be [invalidParams] or between [extensionErrorMin]
+  /// and [extensionErrorMax]. Requires [errorDetail] to be a JSON object
+  /// encoded as a string. When forming the JSON-RPC message [errorDetail] will
+  /// be inlined directly.
+  ServiceExtensionResponse.error(int errorCode, String errorDetail)
+      : _result = null,
+        _errorCode = errorCode,
+        _errorDetail = errorDetail {
+    _validateErrorCode(_errorCode);
+    if (_errorDetail is! String) {
+      throw new ArgumentError.value(_errorDetail,
+                                    "errorDetail",
+                                    "Must be a String");
+    }
+  }
+
+  /// Invalid method parameter(s) error code.
+  @deprecated static const kInvalidParams = invalidParams;
+  /// Generic extension error code.
+  @deprecated static const kExtensionError = extensionError;
+  /// Maximum extension provided error code.
+  @deprecated static const kExtensionErrorMax = extensionErrorMax;
+  /// Minimum extension provided error code.
+  @deprecated static const kExtensionErrorMin = extensionErrorMin;
+
+  /// Invalid method parameter(s) error code.
+  static const invalidParams = -32602;
+  /// Generic extension error code.
+  static const extensionError = -32000;
+  /// Maximum extension provided error code.
+  static const extensionErrorMax = -32000;
+  /// Minimum extension provided error code.
+  static const extensionErrorMin = -32016;
+
+
+  static String _errorCodeMessage(int errorCode) {
+    _validateErrorCode(errorCode);
+    if (errorCode == kInvalidParams) {
+      return "Invalid params";
+    }
+    return "Server error";
+  }
+
+  static _validateErrorCode(int errorCode) {
+    if (errorCode is! int) {
+      throw new ArgumentError.value(errorCode, "errorCode", "Must be an int");
+    }
+    if (errorCode == invalidParams) {
+      return;
+    }
+    if ((errorCode >= extensionErrorMin) &&
+        (errorCode <= extensionErrorMax)) {
+      return;
+    }
+    throw new ArgumentError.value(errorCode, "errorCode", "Out of range");
+  }
+
+  bool _isError() => (_errorCode != null) && (_errorDetail != null);
+
+  String _toString() {
+    if (_result != null) {
+      return _result;
+    } else {
+      assert(_errorCode != null);
+      assert(_errorDetail != null);
+      return JSON.encode({
+        'code': _errorCode,
+        'message': _errorCodeMessage(_errorCode),
+        'data': {
+          'details': _errorDetail
+        }
+      });
+    }
+  }
+}
+
+/// A service protocol extension handler. Registered with [registerExtension].
+///
+/// Must complete to a [ServiceExtensionResponse].
+///
+/// [method] - the method name of the service protocol request.
+/// [parameters] - A map holding the parameters to the service protocol request.
+///
+/// *NOTE*: All parameter names and values are **encoded as strings**.
+typedef Future<ServiceExtensionResponse>
+    ServiceExtensionHandler(String method, Map<String, String> parameters);
+
+/// Register a [ServiceExtensionHandler] that will be invoked in this isolate
+/// for [method]. *NOTE*: Service protocol extensions must be registered
+/// in each isolate.
+///
+/// *NOTE*: [method] must begin with 'ext.' and you should use the following
+/// structure to avoid conflicts with other packages: 'ext.package.command'.
+/// That is, immediately following the 'ext.' prefix, should be the registering
+/// package name followed by another period ('.') and then the command name.
+/// For example: 'ext.dart.io.getOpenFiles'.
+///
+/// Because service extensions are isolate specific, clients using extensions
+/// must always include an 'isolateId' parameter with each RPC.
+void registerExtension(String method, ServiceExtensionHandler handler) {
+  if (method is! String) {
+    throw new ArgumentError.value(method,
+                                  'method',
+                                  'Must be a String');
+  }
+  if (!method.startsWith('ext.')) {
+    throw new ArgumentError.value(method,
+                                  'method',
+                                  'Must begin with ext.');
+  }
+  if (_lookupExtension(method) != null) {
+    throw new ArgumentError('Extension already registered: $method');
+  }
+  if (handler is! ServiceExtensionHandler) {
+    throw new ArgumentError.value(handler,
+                                  'handler',
+                                  'Must be a ServiceExtensionHandler');
+  }
+  _registerExtension(method, handler);
+}
+
+/// Post an event of [eventKind] with payload of [eventData] to the `Extension`
+/// event stream.
+void postEvent(String eventKind, Map eventData) {
+  if (eventKind is! String) {
+    throw new ArgumentError.value(eventKind,
+                                  'eventKind',
+                                  'Must be a String');
+  }
+  if (eventData is! Map) {
+    throw new ArgumentError.value(eventData,
+                                  'eventData',
+                                  'Must be a Map');
+  }
+  String eventDataAsString = JSON.encode(eventData);
+  _postEvent(eventKind, eventDataAsString);
+}
+
+external _postEvent(String eventKind, String eventData);
+
+// Both of these functions are written inside C++ to avoid updating the data
+// structures in Dart, getting an OOB, and observing stale state. Do not move
+// these into Dart code unless you can ensure that the operations will can be
+// done atomically. Native code lives in vm/isolate.cc-
+// LookupServiceExtensionHandler and RegisterServiceExtensionHandler.
+external ServiceExtensionHandler _lookupExtension(String method);
+external _registerExtension(String method, ServiceExtensionHandler handler);