1 files changed, 63 insertions, 0 deletions
diff --git a/layout/style/nsCSSAnonBoxes.h b/layout/style/nsCSSAnonBoxes.h
new file mode 100644
index 0000000000..78539b8d10
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+++ b/layout/style/nsCSSAnonBoxes.h
@@ -0,0 +1,63 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 anonymous boxes */
+
+#ifndef nsCSSAnonBoxes_h___
+#define nsCSSAnonBoxes_h___
+
+#include "nsAtom.h"
+#include "nsGkAtoms.h"
+#include "mozilla/PseudoStyleType.h"
+
+class nsCSSAnonBoxes {
+  using PseudoStyleType = mozilla::PseudoStyleType;
+  using PseudoStyle = mozilla::PseudoStyle;
+
+ public:
+  static bool IsTreePseudoElement(nsAtom* aPseudo);
+  static bool IsNonElement(PseudoStyleType aPseudo) {
+    return aPseudo == PseudoStyleType::mozText ||
+           aPseudo == PseudoStyleType::oofPlaceholder ||
+           aPseudo == PseudoStyleType::firstLetterContinuation;
+  }
+
+  enum class NonInheriting : uint8_t {
+#define CSS_ANON_BOX(_name, _value) /* nothing */
+#define CSS_NON_INHERITING_ANON_BOX(_name, _value) _name,
+#include "nsCSSAnonBoxList.h"
+#undef CSS_NON_INHERITING_ANON_BOX
+#undef CSS_ANON_BOX
+    _Count
+  };
+
+  // Get the NonInheriting type for a given pseudo tag.  The pseudo tag must
+  // test true for IsNonInheritingAnonBox.
+  static NonInheriting NonInheritingTypeForPseudoType(PseudoStyleType aType) {
+    MOZ_ASSERT(PseudoStyle::IsNonInheritingAnonBox(aType));
+    static_assert(sizeof(PseudoStyleType) == sizeof(uint8_t), "");
+    return static_cast<NonInheriting>(
+        static_cast<uint8_t>(aType) -
+        static_cast<uint8_t>(PseudoStyleType::NonInheritingAnonBoxesStart));
+  }
+
+#ifdef DEBUG
+  static nsStaticAtom* GetAtomBase();
+  static void AssertAtoms();
+#endif
+
+// Alias nsCSSAnonBoxes::foo() to nsGkAtoms::AnonBox_foo.
+#define CSS_ANON_BOX(name_, value_)                       \
+  static nsCSSAnonBoxPseudoStaticAtom* name_() {          \
+    return const_cast<nsCSSAnonBoxPseudoStaticAtom*>(     \
+        static_cast<const nsCSSAnonBoxPseudoStaticAtom*>( \
+            nsGkAtoms::AnonBox_##name_));                 \
+  }
+#include "nsCSSAnonBoxList.h"
+#undef CSS_ANON_BOX
+};
+
+#endif /* nsCSSAnonBoxes_h___ */