1 files changed, 120 insertions, 0 deletions
diff --git a/layout/style/nsCSSPseudoElements.cpp b/layout/style/nsCSSPseudoElements.cpp
new file mode 100644
index 000000000..ef09f2d42
--- /dev/null
+++ b/layout/style/nsCSSPseudoElements.cpp
@@ -0,0 +1,120 @@
+/* -*- 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
+
+// Array of nsStaticAtom for each of the pseudo-elements.
+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
+};
+
+// Flags data for each of the pseudo-elements, which must be separate
+// from the previous array since there's no place for it in
+// nsStaticAtom.
+/* static */ const uint32_t
+nsCSSPseudoElements::kPseudoElementFlags[] = {
+#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, EnabledState::eIgnoreEnabledState),
+                   CSS_PSEUDO_ELEMENT_IS_CSS2),
+               "result doesn't match flags");
+  return result;
+}
+
+/* static */ CSSPseudoElementType
+nsCSSPseudoElements::GetPseudoType(nsIAtom *aAtom, EnabledState aEnabledState)
+{
+  for (CSSPseudoElementTypeBase i = 0;
+       i < ArrayLength(CSSPseudoElements_info);
+       ++i) {
+    if (*CSSPseudoElements_info[i].mAtom == aAtom) {
+      auto type = static_cast<Type>(i);
+      // ::moz-placeholder is an alias for ::placeholder
+      if (type == CSSPseudoElementType::mozPlaceholder) {
+        type = CSSPseudoElementType::placeholder;
+      }
+      return IsEnabled(type, aEnabledState) ? type : Type::NotPseudo;
+    }
+  }
+
+  if (nsCSSAnonBoxes::IsAnonBox(aAtom)) {
+#ifdef MOZ_XUL
+    if (nsCSSAnonBoxes::IsTreePseudoElement(aAtom)) {
+      return Type::XULTree;
+    }
+#endif
+
+    return Type::AnonBox;
+  }
+
+  return Type::NotPseudo;
+}
+
+/* static */ nsIAtom*
+nsCSSPseudoElements::GetPseudoAtom(Type aType)
+{
+  NS_ASSERTION(aType < Type::Count, "Unexpected type");
+  return *CSSPseudoElements_info[
+    static_cast<CSSPseudoElementTypeBase>(aType)].mAtom;
+}
+
+/* static */ bool
+nsCSSPseudoElements::PseudoElementSupportsUserActionState(const Type aType)
+{
+  return PseudoElementHasFlags(aType,
+                               CSS_PSEUDO_ELEMENT_SUPPORTS_USER_ACTION_STATE);
+}