diff -r 000000000000 -r 6474c204b198 layout/style/nsROCSSPrimitiveValue.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/style/nsROCSSPrimitiveValue.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,133 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 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/. */
+
+/* DOM object representing values in DOM computed style */
+
+#ifndef nsROCSSPrimitiveValue_h___
+#define nsROCSSPrimitiveValue_h___
+
+#include "nsIDOMCSSValue.h"
+#include "nsIDOMCSSPrimitiveValue.h"
+#include "nsCSSKeywords.h"
+#include "CSSValue.h"
+#include "nsCOMPtr.h"
+#include "nsCoord.h"
+
+class nsIURI;
+class nsDOMCSSRect;
+class nsDOMCSSRGBColor;
+
+// There is no CSS_TURN constant on the CSSPrimitiveValue interface,
+// since that unit is newer than DOM Level 2 Style, and CSS OM will
+// probably expose CSS values in some other way in the future.  We
+// use this value in mType for "turn"-unit angles, but we define it
+// here to avoid exposing it to content.
+#define CSS_TURN 30U
+// Likewise we have some internal aliases for CSS_NUMBER that we don't
+// want to expose.
+#define CSS_NUMBER_INT32 31U
+#define CSS_NUMBER_UINT32 32U
+
+/**
+ * Read-only CSS primitive value - a DOM object representing values in DOM
+ * computed style.
+ */
+class nsROCSSPrimitiveValue MOZ_FINAL : public mozilla::dom::CSSValue,
+  public nsIDOMCSSPrimitiveValue
+{
+public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(nsROCSSPrimitiveValue, mozilla::dom::CSSValue)
+
+  // nsIDOMCSSPrimitiveValue
+  NS_DECL_NSIDOMCSSPRIMITIVEVALUE
+
+  // nsIDOMCSSValue
+  NS_DECL_NSIDOMCSSVALUE
+
+  // CSSValue
+  virtual void GetCssText(nsString& aText, mozilla::ErrorResult& aRv) MOZ_OVERRIDE MOZ_FINAL;
+  virtual void SetCssText(const nsAString& aText, mozilla::ErrorResult& aRv) MOZ_OVERRIDE MOZ_FINAL;
+  virtual uint16_t CssValueType() const MOZ_OVERRIDE MOZ_FINAL;
+
+  // CSSPrimitiveValue
+  uint16_t PrimitiveType()
+  {
+    // New value types were introduced but not added to CSS OM.
+    // Return CSS_UNKNOWN to avoid exposing CSS_TURN to content.
+    if (mType > CSS_RGBCOLOR) {
+      if (mType == CSS_NUMBER_INT32 || mType == CSS_NUMBER_UINT32) {
+        return CSS_NUMBER;
+      }
+      return CSS_UNKNOWN;
+    }
+    return mType;
+  }
+  void SetFloatValue(uint16_t aUnitType, float aValue,
+                     mozilla::ErrorResult& aRv);
+  float GetFloatValue(uint16_t aUnitType, mozilla::ErrorResult& aRv);
+  void GetStringValue(nsString& aString, mozilla::ErrorResult& aRv);
+  void SetStringValue(uint16_t aUnitType, const nsAString& aString,
+                      mozilla::ErrorResult& aRv);
+  already_AddRefed<nsIDOMCounter> GetCounterValue(mozilla::ErrorResult& aRv);
+  nsDOMCSSRect* GetRectValue(mozilla::ErrorResult& aRv);
+  nsDOMCSSRGBColor *GetRGBColorValue(mozilla::ErrorResult& aRv);
+
+  // nsROCSSPrimitiveValue
+  nsROCSSPrimitiveValue();
+  ~nsROCSSPrimitiveValue();
+
+  void SetNumber(float aValue);
+  void SetNumber(int32_t aValue);
+  void SetNumber(uint32_t aValue);
+  void SetPercent(float aValue);
+  void SetDegree(float aValue);
+  void SetGrad(float aValue);
+  void SetRadian(float aValue);
+  void SetTurn(float aValue);
+  void SetAppUnits(nscoord aValue);
+  void SetAppUnits(float aValue);
+  void SetIdent(nsCSSKeyword aKeyword);
+  // FIXME: CSS_STRING should imply a string with "" and a need for escaping.
+  void SetString(const nsACString& aString, uint16_t aType = CSS_STRING);
+  // FIXME: CSS_STRING should imply a string with "" and a need for escaping.
+  void SetString(const nsAString& aString, uint16_t aType = CSS_STRING);
+  void SetURI(nsIURI *aURI);
+  void SetColor(nsDOMCSSRGBColor* aColor);
+  void SetRect(nsDOMCSSRect* aRect);
+  void SetTime(float aValue);
+  void Reset();
+
+  nsISupports* GetParentObject() const
+  {
+    return nullptr;
+  }
+
+  virtual JSObject *WrapObject(JSContext *cx) MOZ_OVERRIDE;
+
+private:
+  uint16_t mType;
+
+  union {
+    nscoord         mAppUnits;
+    float           mFloat;
+    int32_t         mInt32;
+    uint32_t        mUint32;
+    nsDOMCSSRGBColor* mColor;
+    nsDOMCSSRect*     mRect;
+    char16_t*      mString;
+    nsIURI*         mURI;
+    nsCSSKeyword    mKeyword;
+  } mValue;
+};
+
+inline nsROCSSPrimitiveValue *mozilla::dom::CSSValue::AsPrimitiveValue()
+{
+  return CssValueType() == nsIDOMCSSValue::CSS_PRIMITIVE_VALUE ?
+    static_cast<nsROCSSPrimitiveValue*>(this) : nullptr;
+}
+
+#endif /* nsROCSSPrimitiveValue_h___ */
+