jmesserly@google.com
3e243d27e6
R=sigmund@google.com Review URL: https://codereview.chromium.org//178683003 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@32998 260f80e4-7a28-3924-810f-c04153c831b5
80 lines
2.4 KiB
Dart
80 lines
2.4 KiB
Dart
// Copyright (c) 2013, 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.
|
|
|
|
// TODO(jmesserly): can we handle this more elegantly?
|
|
// In general, it seems like we want a convenient way to take a Stream plus a
|
|
// getter and convert this into an Observable.
|
|
|
|
/// Helpers for exposing dart:html as observable data.
|
|
library observe.html;
|
|
|
|
import 'dart:html';
|
|
|
|
import 'observe.dart';
|
|
|
|
/// An observable version of [window.location.hash].
|
|
final ObservableLocationHash windowLocation = new ObservableLocationHash._();
|
|
|
|
class ObservableLocationHash extends ChangeNotifier {
|
|
Object _currentHash;
|
|
|
|
ObservableLocationHash._() {
|
|
// listen on changes to #hash in the URL
|
|
// Note: listen on both popState and hashChange, because IE9 doesn't support
|
|
// history API. See http://dartbug.com/5483
|
|
// TODO(jmesserly): only listen to these if someone is listening to our
|
|
// changes.
|
|
window.onHashChange.listen(_notifyHashChange);
|
|
window.onPopState.listen(_notifyHashChange);
|
|
|
|
_currentHash = hash;
|
|
}
|
|
|
|
@reflectable String get hash => window.location.hash;
|
|
|
|
/// Pushes a new URL state, similar to the affect of clicking a link.
|
|
/// Has no effect if the [value] already equals [window.location.hash].
|
|
@reflectable void set hash(String value) {
|
|
if (value == hash) return;
|
|
|
|
window.history.pushState(null, '', value);
|
|
_notifyHashChange(null);
|
|
}
|
|
|
|
void _notifyHashChange(_) {
|
|
var oldValue = _currentHash;
|
|
_currentHash = hash;
|
|
notifyPropertyChange(#hash, oldValue, _currentHash);
|
|
}
|
|
}
|
|
|
|
/// *Deprecated* use [CssClassSet.toggle] instead.
|
|
///
|
|
/// Add or remove CSS class [className] based on the [value].
|
|
@deprecated
|
|
void updateCssClass(Element element, String className, bool value) {
|
|
if (value == true) {
|
|
element.classes.add(className);
|
|
} else {
|
|
element.classes.remove(className);
|
|
}
|
|
}
|
|
|
|
/// *Deprecated* use `class="{{ binding }}"` in your HTML instead. It will also
|
|
/// work on a `<polymer-element>`.
|
|
///
|
|
/// Bind a CSS class to the observable [object] and property [path].
|
|
@deprecated
|
|
PathObserver bindCssClass(Element element, String className,
|
|
Observable object, String path) {
|
|
|
|
callback(value) {
|
|
updateCssClass(element, className, value);
|
|
}
|
|
|
|
var obs = new PathObserver(object, path);
|
|
callback(obs.open(callback));
|
|
return obs;
|
|
}
|