1 files changed, 87 insertions, 0 deletions
diff --git a/accessible/ipc/win/PlatformChild.cpp b/accessible/ipc/win/PlatformChild.cpp
new file mode 100644
index 0000000000..31026bcf2d
--- /dev/null
+++ b/accessible/ipc/win/PlatformChild.cpp
@@ -0,0 +1,87 @@
+/* -*- 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 "mozilla/a11y/AccessibleHandler.h"
+#include "mozilla/a11y/PlatformChild.h"
+#include "mozilla/mscom/ActCtxResource.h"
+#include "mozilla/mscom/EnsureMTA.h"
+#include "mozilla/mscom/InterceptorLog.h"
+
+#include "Accessible2.h"
+#include "Accessible2_2.h"
+#include "AccessibleHypertext2.h"
+#include "AccessibleTable2.h"
+#include "AccessibleTableCell.h"
+
+#include "AccessibleDocument_i.c"
+#include "AccessibleHypertext2_i.c"
+
+namespace mozilla {
+namespace a11y {
+
+/**
+ * Unfortunately the COM interceptor does not intrinsically handle array
+ * outparams. Instead we manually define the relevant metadata here, and
+ * register it in a call to mozilla::mscom::RegisterArrayData.
+ * @see mozilla::mscom::ArrayData
+ */
+static const mozilla::mscom::ArrayData sPlatformChildArrayData[] = {
+    {IID_IEnumVARIANT, 3, 1, VT_DISPATCH, IID_IDispatch, 2},
+    {IID_IAccessible2, 30, 1, VT_UNKNOWN | VT_BYREF, IID_IAccessibleRelation,
+     2},
+    {IID_IAccessibleRelation, 7, 1, VT_UNKNOWN | VT_BYREF, NEWEST_IA2_IID, 2},
+    {IID_IAccessible2_2, 48, 2, VT_UNKNOWN | VT_BYREF, NEWEST_IA2_IID, 3,
+     mozilla::mscom::ArrayData::Flag::eAllocatedByServer},
+    {IID_IAccessibleTableCell, 4, 0, VT_UNKNOWN | VT_BYREF, NEWEST_IA2_IID, 1,
+     mozilla::mscom::ArrayData::Flag::eAllocatedByServer},
+    {IID_IAccessibleTableCell, 7, 0, VT_UNKNOWN | VT_BYREF, NEWEST_IA2_IID, 1,
+     mozilla::mscom::ArrayData::Flag::eAllocatedByServer},
+    {IID_IAccessibleHypertext2, 25, 0, VT_UNKNOWN | VT_BYREF,
+     IID_IAccessibleHyperlink, 1,
+     mozilla::mscom::ArrayData::Flag::eAllocatedByServer},
+    {IID_IAccessibleTable2, 12, 0, VT_UNKNOWN | VT_BYREF, NEWEST_IA2_IID, 1,
+     mozilla::mscom::ArrayData::Flag::eAllocatedByServer}};
+
+// Type libraries are thread-neutral, so we can register those from any
+// apartment. OTOH, proxies must be registered from within the apartment where
+// we intend to instantiate them. Therefore RegisterProxy() must be called
+// via EnsureMTA.
+PlatformChild::PlatformChild()
+    : mIA2Proxy(mozilla::mscom::RegisterProxy(L"ia2marshal.dll")),
+      mAccTypelib(mozilla::mscom::RegisterTypelib(
+          L"oleacc.dll",
+          mozilla::mscom::RegistrationFlags::eUseSystemDirectory)),
+      mMiscTypelib(mozilla::mscom::RegisterTypelib(L"Accessible.tlb")),
+      mSdnTypelib(mozilla::mscom::RegisterTypelib(L"AccessibleMarshal.dll")) {
+  auto actCtxResource = mscom::ActCtxResource::GetAccessibilityResource();
+
+  mozilla::mscom::MTADeletePtr<mozilla::mscom::ActivationContextRegion>
+      tmpActCtxMTA;
+  mozilla::mscom::EnsureMTA([actCtxResource, &tmpActCtxMTA]() -> void {
+    tmpActCtxMTA.reset(
+        new mozilla::mscom::ActivationContextRegion(actCtxResource));
+  });
+  mActCtxMTA = std::move(tmpActCtxMTA);
+
+  mozilla::mscom::InterceptorLog::Init();
+  mozilla::mscom::RegisterArrayData(sPlatformChildArrayData);
+
+  UniquePtr<mozilla::mscom::RegisteredProxy> customProxy;
+  mozilla::mscom::EnsureMTA([&customProxy]() -> void {
+    customProxy = mozilla::mscom::RegisterProxy();
+  });
+  mCustomProxy = std::move(customProxy);
+
+  // IA2 needs to be registered in both the main thread's STA as well as the MTA
+  UniquePtr<mozilla::mscom::RegisteredProxy> ia2ProxyMTA;
+  mozilla::mscom::EnsureMTA([&ia2ProxyMTA]() -> void {
+    ia2ProxyMTA = mozilla::mscom::RegisterProxy(L"ia2marshal.dll");
+  });
+  mIA2ProxyMTA = std::move(ia2ProxyMTA);
+}
+
+}  // namespace a11y
+}  // namespace mozilla