De-templatize ui::AXPosition

ui/accessibility/ax_position.cc

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/accessibility/ax_position.h"
+
+namespace ui {
+
+constexpr int AXPositionBase::INVALID_TREE_ID;
+constexpr int32_t AXPositionBase::INVALID_ANCHOR_ID;
+constexpr int AXPositionBase::BEFORE_TEXT;
+constexpr int AXPositionBase::INVALID_INDEX;
+constexpr int AXPositionBase::INVALID_OFFSET;
+
+int AXPositionBase::MaxTextOffsetInParent() const {
+  return MaxTextOffset();
+}
+
+bool operator==(const AXPositionBase& first, const AXPositionBase& second) {
+  if (first.IsNullPosition() && second.IsNullPosition())
+    return true;
+  return first.tree_id() == second.tree_id() &&
+         first.anchor_id() == second.anchor_id() &&
+         first.child_index() == second.child_index() &&
+         first.text_offset() == second.text_offset() &&
+         first.affinity() == second.affinity();
+}
+
+bool operator!=(const AXPositionBase& first, const AXPositionBase& second) {
+  return !(first == second);
+}
+
+bool operator<(const AXPositionBase& first, const AXPositionBase& second) {
+  if (first.IsNullPosition() || second.IsNullPosition())
+    return false;
+
+  std::unique_ptr<AXPositionBase> first_ancestor =
+      first.LowestCommonAncestor(second)->AsTreePosition();
+  std::unique_ptr<AXPositionBase> second_ancestor =
+      second.LowestCommonAncestor(first)->AsTreePosition();
+  DCHECK_EQ(first_ancestor->GetOpaqueAnchor(),
+            second_ancestor->GetOpaqueAnchor());
+  return !first_ancestor->IsNullPosition() &&
+         first_ancestor->AsTextPosition()->text_offset() <
+             second_ancestor->AsTextPosition()->text_offset();
+}
+
+bool operator<=(const AXPositionBase& first, const AXPositionBase& second) {
+  return first == second || first < second;
+}
+
+bool operator>(const AXPositionBase& first, const AXPositionBase& second) {
+  if (first.IsNullPosition() || second.IsNullPosition())
+    return false;
+
+  std::unique_ptr<AXPositionBase> first_ancestor =
+      first.LowestCommonAncestor(second)->AsTreePosition();
+  std::unique_ptr<AXPositionBase> second_ancestor =
+      second.LowestCommonAncestor(first)->AsTreePosition();
+  DCHECK_EQ(first_ancestor->GetOpaqueAnchor(),
+            second_ancestor->GetOpaqueAnchor());
+  return !first_ancestor->IsNullPosition() &&
+         first_ancestor->AsTextPosition()->text_offset() >
+             second_ancestor->AsTextPosition()->text_offset();
+}
+
+bool operator>=(const AXPositionBase& first, const AXPositionBase& second) {
+  return first == second || first > second;
+}
+
+}  // namespace ui