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

// Copyright (c) 2012 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.

cr.define('print_preview.ticket_items', function() {
  'use strict';

  /**
   * Duplex ticket item whose value is a {@code boolean} that indicates whether
   * the document should be duplex printed.
   * @param {!print_preview.AppState} appState App state used to persist collate
   *     selection.
   * @param {!print_preview.DestinationStore} destinationStore Destination store
   *     used determine if a destination has the collate capability.
   * @constructor
   * @extends {print_preview.ticket_items.TicketItem}
   */
  function Duplex(appState, destinationStore) {
    print_preview.ticket_items.TicketItem.call(
        this,
        appState,
        print_preview.AppState.Field.IS_DUPLEX_ENABLED,
        destinationStore);
  };

  Duplex.prototype = {
    __proto__: print_preview.ticket_items.TicketItem.prototype,

    /** @override */
    wouldValueBeValid: function(value) {
      return true;
    },

    /** @override */
    isCapabilityAvailable: function() {
      var cap = this.getDuplexCapability_();
      if (!cap) {
        return false;
      }
      var hasLongEdgeOption = false;
      var hasSimplexOption = false;
      cap.option.forEach(function(option) {
        hasLongEdgeOption = hasLongEdgeOption || option.type == 'LONG_EDGE';
        hasSimplexOption = hasSimplexOption || option.type == 'NO_DUPLEX';
      });
      return hasLongEdgeOption && hasSimplexOption;
    },

    /** @override */
    getDefaultValueInternal: function() {
      var cap = this.getDuplexCapability_();
      var defaultOptions = cap.option.filter(function(option) {
        return option.is_default;
      });
      return defaultOptions.length == 0 ? false :
                                          defaultOptions[0].type == 'LONG_EDGE';
    },

    /** @override */
    getCapabilityNotAvailableValueInternal: function() {
      return false;
    },

    /**
     * @return {Object} Duplex capability of the selected destination.
     * @private
     */
    getDuplexCapability_: function() {
      var dest = this.getSelectedDestInternal();
      return (dest &&
              dest.capabilities &&
              dest.capabilities.printer &&
              dest.capabilities.printer.duplex) ||
             null;
    }
  };

  // Export
  return {
    Duplex: Duplex
  };
});