63 lines
1.5 KiB
Dart
63 lines
1.5 KiB
Dart
library angular2.src.http.backends.browser_jsonp;
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import 'package:angular2/di.dart';
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import 'dart:html' show document;
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import 'dart:js' show context, JsObject, JsArray;
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int _nextRequestId = 0;
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const JSONP_HOME = '__ng_jsonp__';
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var _jsonpConnections = null;
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JsObject _getJsonpConnections() {
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if (_jsonpConnections == null) {
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_jsonpConnections = context[JSONP_HOME] = new JsObject(context['Object']);
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}
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return _jsonpConnections;
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}
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// Make sure not to evaluate this in a non-browser environment!
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@Injectable()
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class BrowserJsonp {
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// Construct a <script> element with the specified URL
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dynamic build(String url) {
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var node = document.createElement('script');
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node.src = url;
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return node;
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}
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nextRequestID() {
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return "__req${_nextRequestId++}";
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}
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requestCallback(String id) {
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return """${JSONP_HOME}.${id}.finished""";
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}
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exposeConnection(String id, dynamic connection) {
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var connections = _getJsonpConnections();
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var wrapper = new JsObject(context['Object']);
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wrapper['_id'] = id;
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wrapper['__dart__'] = connection;
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wrapper['finished'] = ([dynamic data]) => connection.finished(data);
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connections[id] = wrapper;
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}
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removeConnection(String id) {
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var connections = _getJsonpConnections();
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connections[id] = null;
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}
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// Attach the <script> element to the DOM
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send(dynamic node) {
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document.body.append(node);
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}
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// Remove <script> element from the DOM
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cleanup(dynamic node) {
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node.remove();
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}
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}
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