Refactor print preview web ui

chrome/browser/resources/print_preview/data/ticket_items/page_range.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';
+
+  /**
+   * Page range ticket item whose value is a {@code string} that represents
+   * which pages in the document should be printed.
+   * @param {!print_preview.DocumentInfo} documentInfo Information about the
+   *     document to print.
+   * @constructor
+   * @extends {print_preview.ticket_items.TicketItem}
+   */
+  function PageRange(documentInfo) {
+    print_preview.ticket_items.TicketItem.call(this);
+
+    /**
+     * Information about the document to print.
+     * @type {!print_preview.DocumentInfo}
+     * @private
+     */
+    this.documentInfo_ = documentInfo;
+  };
+
+  PageRange.prototype = {
+    __proto__: print_preview.ticket_items.TicketItem.prototype,
+
+    /** @override */
+    wouldValueBeValid: function(value) {
+      return value == '' ||
+          isPageRangeTextValid(value, this.documentInfo_.pageCount);
+    },
+
+    /**
+     * @return {!print_preview.PageNumberSet} Set of page numbers defined by the
+     *     page range string.
+     */
+    getPageNumberSet: function() {
+      if (this.isValid()) {
+        return print_preview.PageNumberSet.parse(
+            this.getValue(), this.documentInfo_.pageCount);
+      } else {
+        return print_preview.PageNumberSet.parse(
+            this.getDefaultValueInternal(), this.documentInfo_.pageCount);
+      }
+    },
+
+    /** @override */
+    isCapabilityAvailable: function() {
+      return true;
+    },
+
+    /** @override */
+    getDefaultValueInternal: function() {
+      return '';
+    },
+
+    /** @override */
+    getCapabilityNotAvailableValueInternal: function() {
+      return '';
+    }
+  };
+
+  // Export
+  return {
+    PageRange: PageRange
+  };
+});