Refactor print preview web ui

chrome/browser/resources/print_preview/data/ticket_items/copies.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';
+
+  /**
+   * Copies ticket item whose value is a {@code string} that indicates how many
+   * copies of the document should be printed. The ticket item is backed by a
+   * string since the user can textually input the copies value.
+   * @param {!print_preview.CapabilitiesHolder} capabilitiesHolder Capabilities
+   *     holder used to determine the default number of copies and if the copies
+   *     capability is available.
+   * @constructor
+   * @extends {print_preview.ticket_items.TicketItem}
+   */
+  function Copies(capabilitiesHolder) {
+    print_preview.ticket_items.TicketItem.call(this);
+
+    /**
+     * Capabilities holder used to determine the default number of copies and if
+     * the copies capability is available.
+     * @type {!print_preview.CapabilitiesHolder}
+     * @private
+     */
+    this.capabilitiesHolder_ = capabilitiesHolder;
+  };
+
+  Copies.prototype = {
+    __proto__: print_preview.ticket_items.TicketItem.prototype,
+
+    /** @override */
+    wouldValueBeValid: function(value) {
+      if (/[^\d]+/.test(value)) {
+        return false;
+      }
+      var copies = parseInt(value);
+      if (copies > 999 || copies < 1) {
+        return false;
+      }
+      return true;
+    },
+
+    /** @override */
+    isCapabilityAvailable: function() {
+      return this.capabilitiesHolder_.get().hasCopiesCapability;
+    },
+
+    /** @return {number} The number of copies indicated by the ticket item. */
+    getValueAsNumber: function() {
+      return parseInt(this.getValue());
+    },
+
+    /** @override */
+    getDefaultValueInternal: function() {
+      return this.capabilitiesHolder_.get().defaultCopiesStr;
+    },
+
+    /** @override */
+    getCapabilityNotAvailableValueInternal: function() {
+      return '1';
+    }
+  };
+
+  // Export
+  return {
+    Copies: Copies
+  };
+});