1 files changed, 81 insertions, 0 deletions
diff --git a/accessible/ipc/DocAccessibleChildBase.h b/accessible/ipc/DocAccessibleChildBase.h
new file mode 100644
index 000000000..b8a8bfde1
--- /dev/null
+++ b/accessible/ipc/DocAccessibleChildBase.h
@@ -0,0 +1,81 @@
+/* -*- 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/. */
+
+#ifndef mozilla_a11y_DocAccessibleChildBase_h
+#define mozilla_a11y_DocAccessibleChildBase_h
+
+#include "mozilla/a11y/DocAccessible.h"
+#include "mozilla/a11y/PDocAccessibleChild.h"
+#include "mozilla/Unused.h"
+#include "nsISupportsImpl.h"
+
+namespace mozilla {
+namespace a11y {
+
+class Accessible;
+class AccShowEvent;
+
+class DocAccessibleChildBase : public PDocAccessibleChild
+{
+public:
+  explicit DocAccessibleChildBase(DocAccessible* aDoc)
+    : mDoc(aDoc)
+  {
+    MOZ_COUNT_CTOR(DocAccessibleChildBase);
+  }
+
+  ~DocAccessibleChildBase()
+  {
+    // Shutdown() should have been called, but maybe it isn't if the process is
+    // killed?
+    MOZ_ASSERT(!mDoc);
+    if (mDoc) {
+      mDoc->SetIPCDoc(nullptr);
+    }
+
+    MOZ_COUNT_DTOR(DocAccessibleChildBase);
+  }
+
+  virtual void Shutdown()
+  {
+    DetachDocument();
+    SendShutdown();
+  }
+
+  void ShowEvent(AccShowEvent* aShowEvent);
+
+  virtual void ActorDestroy(ActorDestroyReason) override
+  {
+    if (!mDoc) {
+      return;
+    }
+
+    mDoc->SetIPCDoc(nullptr);
+    mDoc = nullptr;
+  }
+
+protected:
+  static uint32_t InterfacesFor(Accessible* aAcc);
+  static void SerializeTree(Accessible* aRoot, nsTArray<AccessibleData>& aTree);
+
+  virtual void MaybeSendShowEvent(ShowEventData& aData, bool aFromUser)
+  { Unused << SendShowEvent(aData, aFromUser); }
+
+  void DetachDocument()
+  {
+    if (mDoc) {
+      mDoc->SetIPCDoc(nullptr);
+      mDoc = nullptr;
+    }
+  }
+
+  DocAccessible*  mDoc;
+};
+
+} // namespace a11y
+} // namespace mozilla
+
+#endif // mozilla_a11y_DocAccessibleChildBase_h