1 files changed, 44 insertions, 0 deletions
diff --git a/accessible/windows/msaa/RootAccessibleWrap.cpp b/accessible/windows/msaa/RootAccessibleWrap.cpp
new file mode 100644
index 0000000000..3a2477e877
--- /dev/null
+++ b/accessible/windows/msaa/RootAccessibleWrap.cpp
@@ -0,0 +1,44 @@
+/* -*- 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/. */
+
+#include "RootAccessibleWrap.h"
+
+#include "Compatibility.h"
+#include "mozilla/PresShell.h"
+#include "nsCoreUtils.h"
+#include "nsWinUtils.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+////////////////////////////////////////////////////////////////////////////////
+// Constructor/destructor
+
+RootAccessibleWrap::RootAccessibleWrap(dom::Document* aDocument,
+                                       PresShell* aPresShell)
+    : RootAccessible(aDocument, aPresShell) {}
+
+RootAccessibleWrap::~RootAccessibleWrap() {}
+
+////////////////////////////////////////////////////////////////////////////////
+// RootAccessible
+
+void RootAccessibleWrap::DocumentActivated(DocAccessible* aDocument) {
+  // This check will never work with e10s enabled, in other words, as of
+  // Firefox 57.
+  if (Compatibility::IsDolphin() &&
+      nsCoreUtils::IsTopLevelContentDocInProcess(aDocument->DocumentNode())) {
+    MOZ_ASSERT(XRE_IsParentProcess());
+    uint32_t count = mChildDocuments.Length();
+    for (uint32_t idx = 0; idx < count; idx++) {
+      DocAccessible* childDoc = mChildDocuments[idx];
+      HWND childDocHWND = static_cast<HWND>(childDoc->GetNativeWindow());
+      if (childDoc != aDocument)
+        nsWinUtils::HideNativeWindow(childDocHWND);
+      else
+        nsWinUtils::ShowNativeWindow(childDocHWND);
+    }
+  }
+}