1 files changed, 41 insertions, 0 deletions
diff --git a/dom/base/FocusModel.h b/dom/base/FocusModel.h
new file mode 100644
index 0000000000..588c0503a2
--- /dev/null
+++ b/dom/base/FocusModel.h
@@ -0,0 +1,41 @@
+/* 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/. */
+
+#ifndef mozilla_FocusModel_h
+#define mozilla_FocusModel_h
+
+#include "mozilla/StaticPrefs_accessibility.h"
+#include "mozilla/TypedEnumBits.h"
+
+namespace mozilla {
+
+enum class IsFocusableFlags : uint8_t {
+  WithMouse = 1 << 0,
+  // Whether to treat an invisible frame as not focusable
+  IgnoreVisibility = 1 << 1,
+};
+
+MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(IsFocusableFlags);
+
+enum class TabFocusableType : uint8_t {
+  TextControls = 1,       // Textboxes and lists always tabbable
+  FormElements = 1 << 1,  // Non-text form elements
+  Links = 1 << 2,         // Links
+  Any = TextControls | FormElements | Links,
+};
+
+class FocusModel final {
+ public:
+  static bool AppliesToXUL() {
+    return StaticPrefs::accessibility_tabfocus_applies_to_xul();
+  }
+
+  static bool IsTabFocusable(TabFocusableType aType) {
+    return StaticPrefs::accessibility_tabfocus() & int32_t(aType);
+  }
+};
+
+}  // namespace mozilla
+
+#endif