diff -r 000000000000 -r 6474c204b198 layout/style/nsICSSDeclaration.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/style/nsICSSDeclaration.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,174 @@
+/* -*- 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/. */
+
+/*
+ * faster version of nsIDOMCSSStyleDeclaration using enums instead of
+ * strings, for internal use
+ */
+
+#ifndef nsICSSDeclaration_h__
+#define nsICSSDeclaration_h__
+
+/**
+ * This interface provides access to methods analogous to those of
+ * nsIDOMCSSStyleDeclaration; the difference is that these use
+ * nsCSSProperty enums for the prop names instead of using strings.
+ * This is meant for use in performance-sensitive code only!  Most
+ * consumers should continue to use nsIDOMCSSStyleDeclaration.
+ */
+
+#include "mozilla/Attributes.h"
+#include "nsIDOMCSSStyleDeclaration.h"
+#include "nsCSSProperty.h"
+#include "CSSValue.h"
+#include "nsWrapperCache.h"
+#include "nsString.h"
+#include "nsIDOMCSSRule.h"
+#include "nsIDOMCSSValue.h"
+#include "mozilla/ErrorResult.h"
+#include "nsAutoPtr.h"
+#include "nsCOMPtr.h"
+#include "nsINode.h"
+
+// dbeabbfa-6cb3-4f5c-aec2-dd558d9d681f
+#define NS_ICSSDECLARATION_IID \
+{ 0xdbeabbfa, 0x6cb3, 0x4f5c, \
+ { 0xae, 0xc2, 0xdd, 0x55, 0x8d, 0x9d, 0x68, 0x1f } }
+
+class nsICSSDeclaration : public nsIDOMCSSStyleDeclaration,
+                          public nsWrapperCache
+{
+public:
+  NS_DECLARE_STATIC_IID_ACCESSOR(NS_ICSSDECLARATION_IID)
+
+  /**
+   * Method analogous to nsIDOMCSSStyleDeclaration::GetPropertyValue,
+   * which obeys all the same restrictions.
+   */
+  NS_IMETHOD GetPropertyValue(const nsCSSProperty aPropID,
+                              nsAString& aValue) = 0;
+
+  NS_IMETHOD GetAuthoredPropertyValue(const nsAString& aPropName,
+                                      nsAString& aValue) = 0;
+
+  /**
+   * Method analogous to nsIDOMCSSStyleDeclaration::SetProperty.  This
+   * method does NOT allow setting a priority (the priority will
+   * always be set to default priority).
+   */
+  NS_IMETHOD SetPropertyValue(const nsCSSProperty aPropID,
+                              const nsAString& aValue) = 0;
+
+  virtual nsINode *GetParentObject() = 0;
+
+  // Also have to declare all the nsIDOMCSSStyleDeclaration methods,
+  // since we want to be able to call them from the WebIDL versions.
+  NS_IMETHOD GetCssText(nsAString& aCssText) MOZ_OVERRIDE = 0;
+  NS_IMETHOD SetCssText(const nsAString& aCssText) MOZ_OVERRIDE = 0;
+  NS_IMETHOD GetPropertyValue(const nsAString& aPropName,
+                              nsAString& aValue) MOZ_OVERRIDE = 0;
+  virtual already_AddRefed<mozilla::dom::CSSValue>
+    GetPropertyCSSValue(const nsAString& aPropertyName,
+                        mozilla::ErrorResult& aRv) = 0;
+  NS_IMETHOD GetPropertyCSSValue(const nsAString& aProp, nsIDOMCSSValue** aVal) MOZ_OVERRIDE
+  {
+    mozilla::ErrorResult error;
+    nsRefPtr<mozilla::dom::CSSValue> val = GetPropertyCSSValue(aProp, error);
+    if (error.Failed()) {
+      return error.ErrorCode();
+    }
+
+    nsCOMPtr<nsIDOMCSSValue> xpVal = do_QueryInterface(val);
+    xpVal.forget(aVal);
+    return NS_OK;
+  }
+  NS_IMETHOD RemoveProperty(const nsAString& aPropertyName,
+                            nsAString& aReturn) MOZ_OVERRIDE = 0;
+  NS_IMETHOD GetPropertyPriority(const nsAString& aPropertyName,
+                                 nsAString& aReturn) MOZ_OVERRIDE = 0;
+  NS_IMETHOD SetProperty(const nsAString& aPropertyName,
+                         const nsAString& aValue,
+                         const nsAString& aPriority) MOZ_OVERRIDE = 0;
+  NS_IMETHOD GetLength(uint32_t* aLength) MOZ_OVERRIDE = 0;
+  NS_IMETHOD Item(uint32_t aIndex, nsAString& aReturn) MOZ_OVERRIDE
+  {
+    bool found;
+    IndexedGetter(aIndex, found, aReturn);
+    if (!found) {
+      aReturn.Truncate();
+    }
+    return NS_OK;
+  }
+  NS_IMETHOD GetParentRule(nsIDOMCSSRule * *aParentRule) MOZ_OVERRIDE = 0;
+
+  // WebIDL interface for CSSStyleDeclaration
+  void SetCssText(const nsAString& aString, mozilla::ErrorResult& rv) {
+    rv = SetCssText(aString);
+  }
+  void GetCssText(nsString& aString) {
+    // Cast to nsAString& so we end up calling our virtual
+    // |GetCssText(nsAString& aCssText)| overload, which does the real work.
+    GetCssText(static_cast<nsAString&>(aString));
+  }
+  uint32_t Length() {
+    uint32_t length;
+    GetLength(&length);
+    return length;
+  }
+  void Item(uint32_t aIndex, nsString& aPropName) {
+    Item(aIndex, static_cast<nsAString&>(aPropName));
+  }
+
+  // The actual implementation of the Item method and the WebIDL indexed getter
+  virtual void IndexedGetter(uint32_t aIndex, bool& aFound, nsAString& aPropName) = 0;
+
+  void GetPropertyValue(const nsAString& aPropName, nsString& aValue,
+                        mozilla::ErrorResult& rv) {
+    rv = GetPropertyValue(aPropName, aValue);
+  }
+  void GetAuthoredPropertyValue(const nsAString& aPropName, nsString& aValue,
+                                mozilla::ErrorResult& rv) {
+    rv = GetAuthoredPropertyValue(aPropName, aValue);
+  }
+  void GetPropertyPriority(const nsAString& aPropName, nsString& aPriority) {
+    GetPropertyPriority(aPropName, static_cast<nsAString&>(aPriority));
+  }
+  void SetProperty(const nsAString& aPropName, const nsAString& aValue,
+                   const nsAString& aPriority, mozilla::ErrorResult& rv) {
+    rv = SetProperty(aPropName, aValue, aPriority);
+  }
+  void RemoveProperty(const nsAString& aPropName, nsString& aRetval,
+                      mozilla::ErrorResult& rv) {
+    rv = RemoveProperty(aPropName, aRetval);
+  }
+  already_AddRefed<nsIDOMCSSRule> GetParentRule() {
+    nsCOMPtr<nsIDOMCSSRule> rule;
+    GetParentRule(getter_AddRefs(rule));
+    return rule.forget();
+  }
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(nsICSSDeclaration, NS_ICSSDECLARATION_IID)
+
+#define NS_DECL_NSICSSDECLARATION                                   \
+  NS_IMETHOD GetPropertyValue(const nsCSSProperty aPropID,          \
+                              nsAString& aValue);                   \
+  NS_IMETHOD GetAuthoredPropertyValue(const nsAString& aPropName,   \
+                                      nsAString& aValue);           \
+  NS_IMETHOD SetPropertyValue(const nsCSSProperty aPropID,          \
+                              const nsAString& aValue);
+
+#define NS_DECL_NSIDOMCSSSTYLEDECLARATION_HELPER \
+  NS_IMETHOD GetCssText(nsAString & aCssText); \
+  NS_IMETHOD SetCssText(const nsAString & aCssText); \
+  NS_IMETHOD GetPropertyValue(const nsAString & propertyName, nsAString & _retval); \
+  NS_IMETHOD RemoveProperty(const nsAString & propertyName, nsAString & _retval); \
+  NS_IMETHOD GetPropertyPriority(const nsAString & propertyName, nsAString & _retval); \
+  NS_IMETHOD SetProperty(const nsAString & propertyName, const nsAString & value, const nsAString & priority); \
+  NS_IMETHOD GetLength(uint32_t *aLength); \
+  NS_IMETHOD Item(uint32_t index, nsAString & _retval); \
+  NS_IMETHOD GetParentRule(nsIDOMCSSRule * *aParentRule);
+
+#endif // nsICSSDeclaration_h__