chrome/browser/resources/print_preview/data/ticket_items/dpi.js

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 cr.define('print_preview.ticket_items', function() {
   6   'use strict';
   7
   8   /**
   9    * DPI ticket item.
  10    * @param {!print_preview.AppState} appState App state used to persist DPI
  11    *     selection.
  12    * @param {!print_preview.DestinationStore} destinationStore Destination store
  13    *     used to determine if a destination has the DPI capability.
  14    * @constructor
  15    * @extends {print_preview.ticket_items.TicketItem}
  16    */
  17   function Dpi(appState, destinationStore) {
  18     print_preview.ticket_items.TicketItem.call(
  19         this,
  20         appState,
  21         print_preview.AppState.Field.DPI,
  22         destinationStore);
  23   };
  24
  25   Dpi.prototype = {
  26     __proto__: print_preview.ticket_items.TicketItem.prototype,
  27
  28     /** @override */
  29     wouldValueBeValid: function(value) {
  30       if (!this.isCapabilityAvailable())
  31         return false;
  32       return this.capability.option.some(function(option) {
  33         return option.horizontal_dpi == value.horizontal_dpi &&
  34                option.vertical_dpi == value.vertical_dpi &&
  35                option.vendor_id == value.vendor_id;
  36       });
  37     },
  38
  39     /** @override */
  40     isCapabilityAvailable: function() {
  41       return !!this.capability &&
  42              !!this.capability.option &&
  43              this.capability.option.length > 1;
  44     },
  45
  46     /** @override */
  47     isValueEqual: function(value) {
  48       var myValue = this.getValue();
  49       return myValue.horizontal_dpi == value.horizontal_dpi &&
  50              myValue.vertical_dpi == value.vertical_dpi &&
  51              myValue.vendor_id == value.vendor_id;
  52     },
  53
  54     /** @return {Object} DPI capability of the selected destination. */
  55     get capability() {
  56       var destination = this.getSelectedDestInternal();
  57       return (destination &&
  58               destination.capabilities &&
  59               destination.capabilities.printer &&
  60               destination.capabilities.printer.dpi) ||
  61              null;
  62     },
  63
  64     /** @override */
  65     getDefaultValueInternal: function() {
  66       var defaultOptions = this.capability.option.filter(function(option) {
  67         return option.is_default;
  68       });
  69       return defaultOptions.length > 0 ? defaultOptions[0] : null;
  70     },
  71
  72     /** @override */
  73     getCapabilityNotAvailableValueInternal: function() {
  74       return {};
  75     }
  76   };
  77
  78   // Export
  79   return {
  80     Dpi: Dpi
  81   };
  82 });