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// Copyright 2019 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 observing CupsPrintersEntryManager events.
* Use this behavior if you want to receive a dynamically updated list of both
* saved and nearby printers.
*/
/** @polymerBehavior */
const CupsPrintersEntryListBehavior = {
properties: {
/** @private {!settings.printing.CupsPrintersEntryManager} */
entryManager_: Object,
/** @type {!Array<!PrinterListEntry>} */
savedPrinters: {
type: Array,
value: () => [],
},
/** @type {!Array<!PrinterListEntry>} */
nearbyPrinters: {
type: Array,
value: () => [],
},
},
/** @override */
created: function() {
this.entryManager_ =
settings.printing.CupsPrintersEntryManager.getInstance();
},
/** @override */
attached: function() {
this.entryManager_.addOnSavedPrintersChangedListener(
this.onSavedPrintersChanged_.bind(this));
this.entryManager_.addOnNearbyPrintersChangedListener(
this.onNearbyPrintersChanged_.bind(this));
// Initialize saved and nearby printers list.
this.onSavedPrintersChanged_(
this.entryManager_.savedPrinters, [] /* printerAdded */,
[] /* printerRemoved */);
this.onNearbyPrintersChanged_(this.entryManager_.nearbyPrinters);
},
/** @override */
detached: function() {
this.entryManager_.removeOnSavedPrintersChangedListener(
this.onSavedPrintersChanged_.bind(this));
this.entryManager_.removeOnNearbyPrintersChangedListener(
this.onNearbyPrintersChanged_.bind(this));
},
/**
* Non-empty params indicate the applicable change to be notified.
* @param {!Array<!PrinterListEntry>} savedPrinters
* @param {!Array<!PrinterListEntry>} addedPrinters
* @param {!Array<!PrinterListEntry>} removedPrinters
* @private
*/
onSavedPrintersChanged_: function(
savedPrinters, addedPrinters, removedPrinters) {
this.updateList(
'savedPrinters', printer => printer.printerInfo.printerId,
savedPrinters);
assert(!(addedPrinters.length && removedPrinters.length));
if (addedPrinters.length) {
this.onSavedPrintersAdded(addedPrinters);
} else if (removedPrinters.length) {
this.onSavedPrintersRemoved(removedPrinters);
}
},
/**
* @param {!Array<!PrinterListEntry>} printerList
* @private
*/
onNearbyPrintersChanged_: function(printerList) {
this.updateList(
'nearbyPrinters', printer => printer.printerInfo.printerId,
printerList);
},
// CupsPrintersEntryListBehavior methods. Override these in the
// implementations.
/** @param{!Array<!PrinterListEntry>} addedPrinters */
onSavedPrintersAdded: function(addedPrinters) {},
/** @param{!Array<!PrinterListEntry>} removedPrinters */
onSavedPrintersRemoved: function(removedPrinters) {},
};
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