Refactor print preview web ui

chrome/browser/resources/print_preview/data/printable_area.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', function() {
+  'use strict';
+
+  /**
+   * Object describing the printable area of a page in the document.
+   *
+   * @param {print_preview.Coordinate2d!} origin Top left corner of the
+   *     printable area of the document.
+   * @param {print_preview.Size!} size Size of the printable area of the
+   *     document.
+   * @constructor
+   */
+  function PrintableArea(origin, size) {
+    /**
+     * Top left corner of the printable area of the document.
+     * @type {print_preview.Coordinate2d!}
+     * @private
+     */
+    this.origin_ = origin;
+
+    /**
+     * Size of the printable area of the document.
+     * @type {print_preview.Size!}
+     * @private
+     */
+    this.size_ = size;
+  };
+
+  PrintableArea.prototype = {
+    /**
+     * @return {print_preview.Coordinate2d!} Top left corner of the printable
+     *     area of the document.
+     */
+    get origin() {
+      return this.origin_;
+    },
+
+    /**
+     * @return {print_preview.Size!} Size of the printable area of the document.
+     */
+    get size() {
+      return this.size_;
+    },
+
+    /**
+     * @param {print_preview.PrintableArea} other Other printable area to check
+     *     for equality.
+     * @return {boolean} Whether another printable area is equivalent to this
+     *     one.
+     */
+    equals: function(other) {
+      return other != null &&
+          this.origin_.equals(other.origin_) &&
+          this.size_.equals(other.size_);
+    }
+  };
+
+  // Export
+  return {
+    PrintableArea: PrintableArea
+  };
+});