Refactor print preview web ui

chrome/browser/resources/print_preview/data/margins.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';
+
+  /**
+   * Creates a Margins object that holds four margin values in points.
+   * @param {number} top The top margin in pts.
+   * @param {number} right The right margin in pts.
+   * @param {number} bottom The bottom margin in pts.
+   * @param {number} left The left margin in pts.
+   * @constructor
+   */
+  function Margins(top, right, bottom, left) {
+    this.top_ = top;
+    this.right_ = right;
+    this.bottom_ = bottom;
+    this.left_ = left;
+  };
+
+  /**
+   * Enumeration of margin types. Matches enum MarginType in
+   * printing/print_job_constants.h.
+   * @enum {number}
+   */
+  Margins.Type = {
+    DEFAULT: 0,
+    NO_MARGINS: 1,
+    MINIMUM: 2,
+    CUSTOM: 3
+  },
+
+  Margins.prototype = {
+    get top() {
+      return this.top_;
+    },
+
+    get right() {
+      return this.right_;
+    },
+
+    get bottom() {
+      return this.bottom_;
+    },
+
+    get left() {
+      return this.left_;
+    },
+
+    /**
+     * Checks if this margins object is equivalent to another.
+     * @param {print_preview.Margins} other The other margins object to compare
+     *     against.
+     * @return {boolean} Whether this margins object is equivalent to another.
+     */
+    equals: function(other) {
+      return other != null &&
+          this.top_ == other.top_ &&
+          this.right_ == other.right_ &&
+          this.bottom_ == other.bottom_ &&
+          this.left_ == other.left_;
+    }
+  };
+
+  // Export
+  return {
+    Margins: Margins
+  };
+});