Refactor print preview web ui

chrome/browser/resources/print_preview/data/ticket_items/landscape.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';
+
+  /**
+   * Landscape ticket item whose value is a {@code boolean} that indicates
+   * whether the document should be printed in landscape orientation.
+   * @param {!print_preview.CapabilitiesHolder} capabilitiesHolder Capabilities
+   *     holder used to determine the default landscape value and if landscape
+   *     printing is available.
+   * @param {!print_preview.DocumentInfo} documentInfo Information about the
+   *     document to print.
+   * @constructor
+   * @extends {print_preview.ticket_items.TicketItem}
+   */
+  function Landscape(capabilitiesHolder, documentInfo) {
+    print_preview.ticket_items.TicketItem.call(this);
+
+    /**
+     * Capabilities holder used to determine the default landscape value and if
+     * landscape printing is available.
+     * @type {!print_preview.CapabilitiesHolder}
+     * @private
+     */
+    this.capabilitiesHolder_ = capabilitiesHolder;
+
+    /**
+     * Information about the document to print.
+     * @type {!print_preview.DocumentInfo}
+     * @private
+     */
+    this.documentInfo_ = documentInfo;
+  };
+
+  Landscape.prototype = {
+    __proto__: print_preview.ticket_items.TicketItem.prototype,
+
+    /** @override */
+    wouldValueBeValid: function(value) {
+      return true;
+    },
+
+    /** @override */
+    isCapabilityAvailable: function() {
+      // TODO(rltoscano): Technically, the print destination can still change
+      // the orientation of the print out (at least for cloud printers) if the
+      // document is not modifiable. But the preview wouldn't update in this
+      // case so it would be a bad user experience.
+      return this.documentInfo_.isModifiable &&
+          !this.documentInfo_.hasCssMediaStyles &&
+          this.capabilitiesHolder_.get().hasOrientationCapability;
+    },
+
+    /** @override */
+    getDefaultValueInternal: function() {
+      return this.capabilitiesHolder_.get().defaultIsLandscapeEnabled;
+    },
+
+    /** @override */
+    getCapabilityNotAvailableValueInternal: function() {
+      return false;
+    }
+  };
+
+  // Export
+  return {
+    Landscape: Landscape
+  };
+});