1 files changed, 97 insertions, 0 deletions
diff --git a/accessible/base/AccessibleOrProxy.cpp b/accessible/base/AccessibleOrProxy.cpp
new file mode 100644
index 0000000000..3826e6968c
--- /dev/null
+++ b/accessible/base/AccessibleOrProxy.cpp
@@ -0,0 +1,97 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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/. */
+
+#include "AccessibleOrProxy.h"
+#include "mozilla/a11y/DocAccessibleParent.h"
+#include "mozilla/a11y/OuterDocAccessible.h"
+
+namespace mozilla {
+namespace a11y {
+
+int32_t AccessibleOrProxy::IndexInParent() const {
+  if (IsAccessible()) {
+    return AsAccessible()->IndexInParent();
+  }
+
+  ProxyAccessible* proxy = AsProxy();
+  if (!proxy) {
+    return -1;
+  }
+
+  if (proxy->Parent()) {
+    return proxy->IndexInParent();
+  }
+
+  if (proxy->OuterDocOfRemoteBrowser()) {
+    return 0;
+  }
+
+  MOZ_ASSERT_UNREACHABLE("Proxy should have parent or outer doc.");
+  return -1;
+}
+
+AccessibleOrProxy AccessibleOrProxy::Parent() const {
+  if (IsAccessible()) {
+    return AsAccessible()->Parent();
+  }
+
+  ProxyAccessible* proxy = AsProxy();
+  if (!proxy) {
+    return nullptr;
+  }
+
+  if (ProxyAccessible* parent = proxy->Parent()) {
+    return parent;
+  }
+
+  // Otherwise this should be the proxy for the tab's top level document.
+  return proxy->OuterDocOfRemoteBrowser();
+}
+
+AccessibleOrProxy AccessibleOrProxy::ChildAtPoint(
+    int32_t aX, int32_t aY, Accessible::EWhichChildAtPoint aWhichChild) {
+  if (IsProxy()) {
+    return AsProxy()->ChildAtPoint(aX, aY, aWhichChild);
+  }
+  ProxyAccessible* childDoc = RemoteChildDoc();
+  if (childDoc) {
+    // This is an OuterDocAccessible.
+    nsIntRect docRect = AsAccessible()->Bounds();
+    if (!docRect.Contains(aX, aY)) {
+      return nullptr;
+    }
+    if (aWhichChild == Accessible::eDirectChild) {
+      return childDoc;
+    }
+    return childDoc->ChildAtPoint(aX, aY, aWhichChild);
+  }
+  AccessibleOrProxy target = AsAccessible()->ChildAtPoint(aX, aY, aWhichChild);
+  if (target.IsNull() || aWhichChild == Accessible::eDirectChild) {
+    return target;
+  }
+  childDoc = target.RemoteChildDoc();
+  if (childDoc) {
+    // Accessible::ChildAtPoint stopped at an OuterDocAccessible, since it
+    // can't traverse into ProxyAccessibles. Continue the search from childDoc.
+    return childDoc->ChildAtPoint(aX, aY, aWhichChild);
+  }
+  return target;
+}
+
+ProxyAccessible* AccessibleOrProxy::RemoteChildDoc() const {
+  MOZ_ASSERT(!IsNull());
+  if (IsProxy()) {
+    return nullptr;
+  }
+  OuterDocAccessible* outerDoc = AsAccessible()->AsOuterDoc();
+  if (!outerDoc) {
+    return nullptr;
+  }
+  return outerDoc->RemoteChildDoc();
+}
+
+}  // namespace a11y
+}  // namespace mozilla