diff -r 000000000000 -r 6474c204b198 accessible/src/base/StyleInfo.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/accessible/src/base/StyleInfo.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,48 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set expandtab shiftwidth=2 tabstop=2: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef _mozilla_a11y_style_h_
+#define _mozilla_a11y_style_h_
+
+#include "mozilla/gfx/Types.h"
+#include "nsStyleContext.h"
+
+namespace mozilla {
+namespace a11y {
+
+class StyleInfo
+{
+public:
+  StyleInfo(dom::Element* aElement, nsIPresShell* aPresShell);
+  ~StyleInfo() { }
+
+  void Display(nsAString& aValue);
+  void TextAlign(nsAString& aValue);
+  void TextIndent(nsAString& aValue);
+  void MarginLeft(nsAString& aValue) { Margin(css::eSideLeft, aValue); }
+  void MarginRight(nsAString& aValue) { Margin(css::eSideRight, aValue); }
+  void MarginTop(nsAString& aValue) { Margin(css::eSideTop, aValue); }
+  void MarginBottom(nsAString& aValue) { Margin(css::eSideBottom, aValue); }
+
+  static void FormatColor(const nscolor& aValue, nsString& aFormattedValue);
+  static void FormatFontStyle(const nscoord& aValue, nsAString& aFormattedValue);
+  static void FormatTextDecorationStyle(uint8_t aValue, nsAString& aFormattedValue);
+
+private:
+  StyleInfo() MOZ_DELETE;
+  StyleInfo(const StyleInfo&) MOZ_DELETE;
+  StyleInfo& operator = (const StyleInfo&) MOZ_DELETE;
+
+  void Margin(css::Side aSide, nsAString& aValue);
+
+  dom::Element* mElement;
+  nsRefPtr<nsStyleContext> mStyleContext;
+};
+
+} // namespace a11y
+} // namespace mozilla
+
+#endif