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more-route-context-aware.html
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<!--
Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
Code distributed by Google as part of the polymer project is also
subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
-->
<link rel="import" href="../polymer/polymer.html">
<link rel="import" href="route.html">
<link rel="import" href="routing.html">
<script>
MoreRouting.ContextAware = {
/** @override */
ready: function() {
this._makeRoutingReady();
},
/**
* Calls `routingReady`, and ensures that it is called in a top-down manner.
*
* We need to be sure that parent nodes have `routingReady` triggered before
* their children so that they can properly configure nested routes.
*
* Unfortunately, `ready` is sometimes bottom-up, sometimes top-down.
* Ideally, this wouldn't be necessary.
*
* @see https://github.com/Polymer/polymer/pull/1448
*/
_makeRoutingReady: function() {
if (this.routingIsReady) return;
var node = this;
while (node = Polymer.dom(node).parentNode) {
if (typeof node._makeRoutingReady === 'function') break;
}
if (node) node._makeRoutingReady();
this.parentRoute = this._findParentRoute();
this.routingIsReady = true;
if (typeof this.routingReady === 'function') this.routingReady();
},
_findParentRoute: function() {
var node = this;
while (node) {
node = Polymer.dom(node).parentNode;
if (node && node.nodeType !== Node.ELEMENT_NODE) {
node = node.host;
}
var route = node && node.moreRouteContext;
if (route instanceof MoreRouting.Route) {
return route;
}
}
return null;
},
};
</script>