third_party/polymer/v1_0/components-chromium/more-routing/more-route-context-aware-extracted.js

   1
   2
   3   MoreRouting.ContextAware = {
   4
   5     /** @override */
   6     ready: function() {
   7       this._makeRoutingReady();
   8     },
   9
  10     /**
  11      * Calls `routingReady`, and ensures that it is called in a top-down manner.
  12      *
  13      * We need to be sure that parent nodes have `routingReady` triggered before
  14      * their children so that they can properly configure nested routes.
  15      *
  16      * Unfortunately, `ready` is sometimes bottom-up, sometimes top-down.
  17      * Ideally, this wouldn't be necessary.
  18      *
  19      * @see https://github.com/Polymer/polymer/pull/1448
  20      */
  21     _makeRoutingReady: function() {
  22       if (this.routingIsReady) return;
  23
  24       var node = this;
  25       while (node = Polymer.dom(node).parentNode) {
  26         if (typeof node._makeRoutingReady === 'function') break;
  27       }
  28       if (node) node._makeRoutingReady();
  29
  30       this.parentRoute = this._findParentRoute();
  31       this.routingIsReady = true;
  32       if (typeof this.routingReady === 'function') this.routingReady();
  33     },
  34
  35     _findParentRoute: function() {
  36       var node = this;
  37       while (node) {
  38         node = Polymer.dom(node).parentNode;
  39         if (node && node.nodeType !== Node.ELEMENT_NODE) {
  40           node = node.host;
  41         }
  42
  43         var route = node && node.moreRouteContext;
  44         if (route instanceof MoreRouting.Route) {
  45           return route;
  46         }
  47       }
  48       return null;
  49     },
  50
  51   };
  52