Index: lib/html_import_annotation.dart |
diff --git a/lib/html_import_annotation.dart b/lib/html_import_annotation.dart |
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+++ b/lib/html_import_annotation.dart |
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+// 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. |
+library web_components.html_import_annotation; |
+ |
+import 'dart:async'; |
+import 'dart:html'; |
+import 'package:initialize/initialize.dart'; |
+import 'src/normalize_path.dart'; |
+ |
+/// Annotation for a dart library which injects an html import into the |
+/// current html document. The imported file must not contain any dart script |
+/// tags, as they cannot be dynamically loaded. |
+class HtmlImport implements Initializer<LibraryIdentifier> { |
+ final String filePath; |
+ |
+ const HtmlImport(this.filePath); |
+ |
+ Future initialize(LibraryIdentifier library) { |
+ var element = new LinkElement() |
+ ..rel = 'import' |
+ ..href = normalizeHtmlImportPath(filePath, library.package, library.path); |
+ document.head.append(element); |
+ var completer = new Completer(); |
+ var listeners = [ |
+ element.on['load'].listen((_) => completer.complete()), |
+ element.on['error'].listen((_) { |
+ print('Error loading html import from path `$filePath`'); |
+ completer.complete(); |
+ }), |
+ ]; |
+ return completer.future.then((_) { |
+ listeners.forEach((listener) => listener.cancel()); |
+ }); |
+ } |
+} |