diff -r 000000000000 -r 6474c204b198 content/base/src/nsStyledElement.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/base/src/nsStyledElement.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,90 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set tw=80 expandtab softtabstop=2 ts=2 sw=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/. */
+
+/**
+ * nsStyledElement is the base for elements supporting styling via the
+ * id/class/style attributes; it is a common base for their support in HTML,
+ * SVG and MathML.
+ */
+
+#ifndef __NS_STYLEDELEMENT_H_
+#define __NS_STYLEDELEMENT_H_
+
+#include "mozilla/Attributes.h"
+#include "nsString.h"
+#include "mozilla/dom/Element.h"
+
+namespace mozilla {
+namespace css {
+class StyleRule;
+}
+}
+
+typedef mozilla::dom::Element nsStyledElementBase;
+
+class nsStyledElementNotElementCSSInlineStyle : public nsStyledElementBase
+{
+
+protected:
+
+  inline nsStyledElementNotElementCSSInlineStyle(already_AddRefed<nsINodeInfo>& aNodeInfo)
+    : nsStyledElementBase(aNodeInfo)
+  {}
+
+public:
+  // nsIContent interface methods
+  virtual nsIAtom* GetClassAttributeName() const MOZ_OVERRIDE;
+  virtual nsIAtom* GetIDAttributeName() const MOZ_OVERRIDE;
+  virtual nsIAtom* DoGetID() const MOZ_OVERRIDE;
+  virtual const nsAttrValue* DoGetClasses() const MOZ_OVERRIDE;
+
+  virtual mozilla::css::StyleRule* GetInlineStyleRule();
+  virtual nsresult SetInlineStyleRule(mozilla::css::StyleRule* aStyleRule,
+                                      const nsAString* aSerialized,
+                                      bool aNotify) MOZ_OVERRIDE;
+
+  virtual nsresult UnsetAttr(int32_t aNameSpaceID, nsIAtom* aAttribute,
+                             bool aNotify) MOZ_OVERRIDE;
+  virtual nsresult AfterSetAttr(int32_t aNameSpaceID, nsIAtom* aAttribute,
+                                const nsAttrValue* aValue, bool aNotify) MOZ_OVERRIDE;
+
+  nsICSSDeclaration* Style();
+
+protected:
+
+  /**
+   * Parse a style attr value into a CSS rulestruct (or, if there is no
+   * document, leave it as a string) and return as nsAttrValue.
+   *
+   * @param aValue the value to parse
+   * @param aResult the resulting HTMLValue [OUT]
+   */
+  void ParseStyleAttribute(const nsAString& aValue,
+                           nsAttrValue& aResult,
+                           bool aForceInDataDoc);
+
+  virtual bool ParseAttribute(int32_t aNamespaceID, nsIAtom* aAttribute,
+                                const nsAString& aValue, nsAttrValue& aResult) MOZ_OVERRIDE;
+
+  friend class mozilla::dom::Element;
+
+  /**
+   * Create the style struct from the style attr.  Used when an element is
+   * first put into a document.  Only has an effect if the old value is a
+   * string.  If aForceInDataDoc is true, will reparse even if we're in a data
+   * document.
+   */
+  nsresult  ReparseStyleAttribute(bool aForceInDataDoc);
+};
+
+class nsStyledElement : public nsStyledElementNotElementCSSInlineStyle {
+protected:
+  inline nsStyledElement(already_AddRefed<nsINodeInfo>& aNodeInfo)
+    : nsStyledElementNotElementCSSInlineStyle(aNodeInfo)
+  {}
+};
+
+#endif // __NS_STYLEDELEMENT_H_