Refactor print preview web ui

chrome/browser/resources/print_preview/data/page_layout.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';
+
+  /**
+   * Class describing the layout of the page.
+   *
+   * @constructor
+   */
+  function PageLayout(width, height, left, top, right, bottom) {
+    this.contentWidth_ = width;
+    this.contentHeight_ = height;
+    this.margins_ = new Margins(left, top, right, bottom);
+    this.margins_.roundToLocaleUnits();
+  };
+
+  PageLayout.prototype = {
+    /** @return {number} The width of the page. */
+    get pageWidth() {
+      return this.margins_.left + this.margins_.right + this.contentWidth_;
+    },
+
+    /** @return {number} The height of the page. */
+    get pageHeight() {
+      return this.margins_.top + this.margins_.bottom + this.contentHeight_;
+    }
+  };
+
+  // Export
+  return {
+    PageLayout: PageLayout
+  };
+});