1 files changed, 38 insertions, 0 deletions
diff --git a/layout/style/SheetType.h b/layout/style/SheetType.h
new file mode 100644
index 000000000..33d1efc1a
--- /dev/null
+++ b/layout/style/SheetType.h
@@ -0,0 +1,38 @@
+/* -*- 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/. */
+
+/* enum to represent a level in the cascade */
+
+#ifndef mozilla_SheetType_h
+#define mozilla_SheetType_h
+
+#include <stdint.h>
+
+namespace mozilla {
+
+// The "origins" of the CSS cascade, from lowest precedence to
+// highest (for non-!important rules).
+//
+// Be sure to update NS_RULE_NODE_LEVEL_MASK when changing the number
+// of sheet types; static assertions enforce this.
+enum class SheetType : uint8_t {
+  Agent, // CSS
+  User, // CSS
+  PresHint,
+  SVGAttrAnimation,
+  Doc, // CSS
+  ScopedDoc,
+  StyleAttr,
+  Override, // CSS
+  Animation,
+  Transition,
+
+  Count,
+  Unknown = 0xff
+};
+
+} // namespace mozilla
+
+#endif // mozilla_SheetType_h