1 files changed, 98 insertions, 0 deletions
diff --git a/accessible/base/CacheConstants.h b/accessible/base/CacheConstants.h
new file mode 100644
index 0000000000..06e45a1921
--- /dev/null
+++ b/accessible/base/CacheConstants.h
@@ -0,0 +1,98 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set expandtab shiftwidth=2 tabstop=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/. */
+
+#ifndef _CacheConstants_h_
+#define _CacheConstants_h_
+
+#include "nsGkAtoms.h"
+#include "RelationType.h"
+
+namespace mozilla {
+namespace a11y {
+
+class CacheDomain {
+ public:
+  static constexpr uint64_t NameAndDescription = ((uint64_t)0x1) << 0;
+  static constexpr uint64_t Value = ((uint64_t)0x1) << 1;
+  static constexpr uint64_t Bounds = ((uint64_t)0x1) << 2;
+  static constexpr uint64_t Resolution = ((uint64_t)0x1) << 3;
+  static constexpr uint64_t Text = ((uint64_t)0x1) << 4;
+  static constexpr uint64_t DOMNodeIDAndClass = ((uint64_t)0x1) << 5;
+  static constexpr uint64_t State = ((uint64_t)0x1) << 6;
+  static constexpr uint64_t GroupInfo = ((uint64_t)0x1) << 7;
+  static constexpr uint64_t Actions = ((uint64_t)0x1) << 8;
+  static constexpr uint64_t Style = ((uint64_t)0x1) << 9;
+  static constexpr uint64_t TransformMatrix = ((uint64_t)0x1) << 10;
+  static constexpr uint64_t ScrollPosition = ((uint64_t)0x1) << 11;
+  static constexpr uint64_t Table = ((uint64_t)0x1) << 12;
+  static constexpr uint64_t Spelling = ((uint64_t)0x1) << 13;
+  static constexpr uint64_t Viewport = ((uint64_t)0x1) << 14;
+  static constexpr uint64_t ARIA = ((uint64_t)0x1) << 15;
+  static constexpr uint64_t Relations = ((uint64_t)0x1) << 16;
+#ifdef XP_WIN
+  // Used for MathML.
+  static constexpr uint64_t InnerHTML = ((uint64_t)0x1) << 17;
+#endif
+  static constexpr uint64_t All = ~((uint64_t)0x0);
+};
+
+enum class CacheUpdateType {
+  /*
+   * An initial cache push of a loaded document or inserted subtree.
+   */
+  Initial,
+
+  /*
+   * An incremental cache push of one or more fields that have changed.
+   */
+  Update,
+};
+
+struct RelationData {
+  nsStaticAtom* const mAtom;
+  nsStaticAtom* const mValidTag;
+  RelationType mType;
+  RelationType mReverseType;
+};
+
+/**
+ * This array of RelationData lists our relation types (explicit and reverse)
+ * and the cache attribute atoms that store their targets. Attributes may
+ * describe different kinds of relations, depending on the element they
+ * originate on. For example, an <output> element's `for` attribute describes a
+ * CONTROLLER_FOR relation, while the `for` attribute of a <label> describes a
+ * LABEL_FOR relation. To ensure we process these attributes appropriately,
+ * RelationData.mValidTag contains the atom for the tag this attribute/relation
+ * type pairing is valid on. If the pairing is valid for all tag types, this
+ * field is null.
+ */
+static constexpr RelationData kRelationTypeAtoms[] = {
+    {nsGkAtoms::aria_labelledby, nullptr, RelationType::LABELLED_BY,
+     RelationType::LABEL_FOR},
+    {nsGkAtoms::_for, nsGkAtoms::label, RelationType::LABEL_FOR,
+     RelationType::LABELLED_BY},
+    {nsGkAtoms::aria_controls, nullptr, RelationType::CONTROLLER_FOR,
+     RelationType::CONTROLLED_BY},
+    {nsGkAtoms::_for, nsGkAtoms::output, RelationType::CONTROLLED_BY,
+     RelationType::CONTROLLER_FOR},
+    {nsGkAtoms::aria_describedby, nullptr, RelationType::DESCRIBED_BY,
+     RelationType::DESCRIPTION_FOR},
+    {nsGkAtoms::aria_flowto, nullptr, RelationType::FLOWS_TO,
+     RelationType::FLOWS_FROM},
+    {nsGkAtoms::aria_details, nullptr, RelationType::DETAILS,
+     RelationType::DETAILS_FOR},
+    {nsGkAtoms::aria_errormessage, nullptr, RelationType::ERRORMSG,
+     RelationType::ERRORMSG_FOR},
+};
+
+// The count of numbers needed to serialize an nsRect. This is used when
+// flattening character rects into an array of ints.
+constexpr int32_t kNumbersInRect = 4;
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif