1 files changed, 97 insertions, 0 deletions
diff --git a/accessible/ipc/win/handler/AccessibleHandlerControl.h b/accessible/ipc/win/handler/AccessibleHandlerControl.h
new file mode 100644
index 0000000000..d016ecb98b
--- /dev/null
+++ b/accessible/ipc/win/handler/AccessibleHandlerControl.h
@@ -0,0 +1,97 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=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/. */
+
+#if defined(MOZILLA_INTERNAL_API)
+#  error This code is NOT for internal Gecko use!
+#endif  // defined(MOZILLA_INTERNAL_API)
+
+#ifndef mozilla_a11y_AccessibleHandlerControl_h
+#  define mozilla_a11y_AccessibleHandlerControl_h
+
+#  include <unordered_map>
+#  include "Factory.h"
+#  include "HandlerData.h"
+#  include "IUnknownImpl.h"
+#  include "mozilla/mscom/Registration.h"
+#  include "mozilla/NotNull.h"
+
+namespace mozilla {
+namespace a11y {
+
+namespace detail {
+
+class TextChange final {
+ public:
+  TextChange();
+  TextChange(long aIA2UniqueId, bool aIsInsert, NotNull<IA2TextSegment*> aText);
+  TextChange(TextChange&& aOther);
+  TextChange(const TextChange& aOther);
+
+  TextChange& operator=(TextChange&& aOther);
+  TextChange& operator=(const TextChange& aOther);
+
+  ~TextChange();
+
+  HRESULT GetOld(long aIA2UniqueId, NotNull<IA2TextSegment*> aOutOldSegment);
+  HRESULT GetNew(long aIA2UniqueId, NotNull<IA2TextSegment*> aOutNewSegment);
+
+ private:
+  static BSTR BSTRCopy(const BSTR& aIn);
+  static HRESULT SegCopy(IA2TextSegment& aDest, const IA2TextSegment& aSrc);
+
+  long mIA2UniqueId;
+  bool mIsInsert;
+  IA2TextSegment mText;
+};
+
+}  // namespace detail
+
+class AccessibleHandler;
+
+class AccessibleHandlerControl final : public IHandlerControl {
+ public:
+  static HRESULT Create(AccessibleHandlerControl** aOutObject);
+
+  DECL_IUNKNOWN
+
+  // IHandlerControl
+  STDMETHODIMP Invalidate() override;
+  STDMETHODIMP OnTextChange(long aHwnd, long aIA2UniqueId,
+                            VARIANT_BOOL aIsInsert,
+                            IA2TextSegment* aText) override;
+
+  uint32_t GetCacheGen() const { return mCacheGen; }
+
+  HRESULT GetNewText(long aIA2UniqueId, NotNull<IA2TextSegment*> aOutNewText);
+  HRESULT GetOldText(long aIA2UniqueId, NotNull<IA2TextSegment*> aOutOldText);
+
+  HRESULT GetHandlerTypeInfo(ITypeInfo** aOutTypeInfo);
+
+  HRESULT Register(NotNull<IGeckoBackChannel*> aGecko);
+
+  void CacheAccessible(long aUniqueId, AccessibleHandler* aAccessible);
+  HRESULT GetCachedAccessible(long aUniqueId, AccessibleHandler** aAccessible);
+
+ private:
+  AccessibleHandlerControl();
+  ~AccessibleHandlerControl() = default;
+
+  bool mIsRegistered;
+  uint32_t mCacheGen;
+  detail::TextChange mTextChange;
+  UniquePtr<mscom::RegisteredProxy> mIA2Proxy;
+  UniquePtr<mscom::RegisteredProxy> mHandlerProxy;
+  // We can't use Gecko APIs in this dll, hence the use of std::unordered_map.
+  typedef std::unordered_map<long, RefPtr<AccessibleHandler>> AccessibleCache;
+  AccessibleCache mAccessibleCache;
+};
+
+extern mscom::SingletonFactory<AccessibleHandlerControl> gControlFactory;
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif  // mozilla_a11y_AccessibleHandlerControl_h