diff -r 000000000000 -r 6474c204b198 layout/style/nsCSSPseudoElements.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/style/nsCSSPseudoElements.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,121 @@
+/* -*- 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/. */
+
+/* atom list for CSS pseudo-elements */
+
+#include "mozilla/ArrayUtils.h"
+
+#include "nsCSSPseudoElements.h"
+#include "nsAtomListUtils.h"
+#include "nsStaticAtom.h"
+#include "nsCSSAnonBoxes.h"
+
+using namespace mozilla;
+
+// define storage for all atoms
+#define CSS_PSEUDO_ELEMENT(name_, value_, flags_) \
+  nsICSSPseudoElement* nsCSSPseudoElements::name_;
+#include "nsCSSPseudoElementList.h"
+#undef CSS_PSEUDO_ELEMENT
+
+#define CSS_PSEUDO_ELEMENT(name_, value_, flags_) \
+  NS_STATIC_ATOM_BUFFER(name_##_pseudo_element_buffer, value_)
+#include "nsCSSPseudoElementList.h"
+#undef CSS_PSEUDO_ELEMENT
+
+static const nsStaticAtom CSSPseudoElements_info[] = {
+#define CSS_PSEUDO_ELEMENT(name_, value_, flags_) \
+  NS_STATIC_ATOM(name_##_pseudo_element_buffer, (nsIAtom**)&nsCSSPseudoElements::name_),
+#include "nsCSSPseudoElementList.h"
+#undef CSS_PSEUDO_ELEMENT
+};
+
+// Separate from the array above so that we can have an array of
+// nsStaticAtom (to pass to NS_RegisterStaticAtoms and
+// nsAtomListUtils::IsMember), but with corresponding indices (so the
+// i-th element of this array is the flags for the i-th pseudo-element
+// in the previous array).
+static const uint32_t CSSPseudoElements_flags[] = {
+#define CSS_PSEUDO_ELEMENT(name_, value_, flags_) \
+  flags_,
+#include "nsCSSPseudoElementList.h"
+#undef CSS_PSEUDO_ELEMENT
+};
+
+void nsCSSPseudoElements::AddRefAtoms()
+{
+  NS_RegisterStaticAtoms(CSSPseudoElements_info);
+}
+
+bool nsCSSPseudoElements::IsPseudoElement(nsIAtom *aAtom)
+{
+  return nsAtomListUtils::IsMember(aAtom, CSSPseudoElements_info,
+                                   ArrayLength(CSSPseudoElements_info));
+}
+
+/* static */ bool
+nsCSSPseudoElements::IsCSS2PseudoElement(nsIAtom *aAtom)
+{
+  // We don't implement this using PseudoElementHasFlags because callers
+  // want to pass things that could be anon boxes.
+  NS_ASSERTION(nsCSSPseudoElements::IsPseudoElement(aAtom) ||
+               nsCSSAnonBoxes::IsAnonBox(aAtom),
+               "must be pseudo element or anon box");
+  bool result = aAtom == nsCSSPseudoElements::after ||
+                  aAtom == nsCSSPseudoElements::before ||
+                  aAtom == nsCSSPseudoElements::firstLetter ||
+                  aAtom == nsCSSPseudoElements::firstLine;
+  NS_ASSERTION(nsCSSAnonBoxes::IsAnonBox(aAtom) ||
+               result ==
+                 PseudoElementHasFlags(GetPseudoType(aAtom), CSS_PSEUDO_ELEMENT_IS_CSS2),
+               "result doesn't match flags");
+  return result;
+}
+
+/* static */ nsCSSPseudoElements::Type
+nsCSSPseudoElements::GetPseudoType(nsIAtom *aAtom)
+{
+  for (uint32_t i = 0; i < ArrayLength(CSSPseudoElements_info); ++i) {
+    if (*CSSPseudoElements_info[i].mAtom == aAtom) {
+      return Type(i);
+    }
+  }
+
+  if (nsCSSAnonBoxes::IsAnonBox(aAtom)) {
+#ifdef MOZ_XUL
+    if (nsCSSAnonBoxes::IsTreePseudoElement(aAtom)) {
+      return ePseudo_XULTree;
+    }
+#endif
+
+    return ePseudo_AnonBox;
+  }
+
+  return ePseudo_NotPseudoElement;
+}
+
+/* static */ nsIAtom*
+nsCSSPseudoElements::GetPseudoAtom(Type aType)
+{
+  NS_ASSERTION(aType < nsCSSPseudoElements::ePseudo_PseudoElementCount,
+               "Unexpected type");
+  return *CSSPseudoElements_info[aType].mAtom;
+}
+
+/* static */ uint32_t
+nsCSSPseudoElements::FlagsForPseudoElement(const Type aType)
+{
+  size_t index = static_cast<size_t>(aType);
+  NS_ASSERTION(index < ArrayLength(CSSPseudoElements_flags),
+               "argument must be a pseudo-element");
+  return CSSPseudoElements_flags[index];
+}
+
+/* static */ bool
+nsCSSPseudoElements::PseudoElementSupportsUserActionState(const Type aType)
+{
+  return PseudoElementHasFlags(aType,
+                               CSS_PSEUDO_ELEMENT_SUPPORTS_USER_ACTION_STATE);
+}