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// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/**
* @fileoverview Polymer behavior for alerting specified child elements of
* changes to the devices network data.
*/
/** @polymerBehavior */
const CrNetworkListenerBehavior = {
properties: {
/**
* Array of selectors specifying all children to alert of changes to the
* network list.
* @private {!Array<string>}
*/
networkListChangeSubscriberSelectors_: Array,
/**
* Array of selectors specifying all children to alert of important changes
* to the specific networks.
* @private {!Array<string>}
*/
networksChangeSubscriberSelectors_: Array,
/** @type {!NetworkingPrivate} */
networkingPrivate: Object,
},
/** @private {?function(!Array<string>)} */
networkListChangedListener_: null,
/** @private {?function(!Array<string>)} */
networksChangedListener_: null,
/** @override */
attached: function() {
this.networkListChangedListener_ = this.networkListChangedListener_ ||
this.onNetworkListChanged_.bind(this);
this.networkingPrivate.onNetworkListChanged.addListener(
this.networkListChangedListener_);
this.networksChangedListener_ =
this.networksChangedListener_ || this.onNetworksChanged_.bind(this);
this.networkingPrivate.onNetworksChanged.addListener(
this.networksChangedListener_);
},
/** @override */
detached: function() {
this.networkingPrivate.onNetworkListChanged.removeListener(
assert(this.networkListChangedListener_));
this.networkingPrivate.onNetworksChanged.removeListener(
assert(this.networksChangedListener_));
},
/**
* This event is triggered when the list of networks changes.
* |networkIds| contains the ids for all visible or configured networks.
* networkingPrivate.onNetworkListChanged event callback.
* @param {!Array<string>} networkIds
* @private
*/
onNetworkListChanged_: function(networkIds) {
const event = new CustomEvent('network-list-changed', {detail: networkIds});
for (let i = 0; i < this.networkListChangeSubscriberSelectors_.length;
i++) {
this.maybeDispatchEvent_(
this.networkListChangeSubscriberSelectors_[i], event);
}
},
/**
* This event is triggered when interesting properties of a network change.
* |networkIds| contains the ids for networks whose properties have changed.
* networkingPrivate.onNetworksChanged event callback.
* @param {!Array<string>} networkIds
* @private
*/
onNetworksChanged_: function(networkIds) {
const event = new CustomEvent('networks-changed', {detail: networkIds});
for (let i = 0; i < this.networksChangeSubscriberSelectors_.length; i++) {
this.maybeDispatchEvent_(
this.networksChangeSubscriberSelectors_[i], event);
}
},
/**
* @param {!Event} event
* @private
*/
maybeDispatchEvent_: function(selectors, event) {
const element = this.$$(selectors);
if (!element)
return;
element.dispatchEvent(event);
},
};
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