1 files changed, 106 insertions, 0 deletions
diff --git a/accessible/windows/msaa/ServiceProvider.cpp b/accessible/windows/msaa/ServiceProvider.cpp
new file mode 100644
index 0000000000..b2b005f3b4
--- /dev/null
+++ b/accessible/windows/msaa/ServiceProvider.cpp
@@ -0,0 +1,106 @@
+/* -*- 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/. */
+
+#include "ServiceProvider.h"
+
+#include "AccessibleApplication_i.c"
+#include "ApplicationAccessibleWrap.h"
+#include "DocAccessible.h"
+#include "nsAccUtils.h"
+#include "nsCoreUtils.h"
+#include "Relation.h"
+#include "RootAccessible.h"
+#include "uiaRawElmProvider.h"
+
+#include "mozilla/a11y/DocAccessibleChild.h"
+#include "mozilla/Preferences.h"
+
+#include "ISimpleDOM.h"
+
+namespace mozilla {
+namespace a11y {
+
+IMPL_IUNKNOWN_QUERY_HEAD(ServiceProvider)
+IMPL_IUNKNOWN_QUERY_IFACE(IServiceProvider)
+IMPL_IUNKNOWN_QUERY_TAIL_AGGREGATED(mMsaa)
+
+////////////////////////////////////////////////////////////////////////////////
+// IServiceProvider
+
+STDMETHODIMP
+ServiceProvider::QueryService(REFGUID aGuidService, REFIID aIID,
+                              void** aInstancePtr) {
+  if (!aInstancePtr) return E_INVALIDARG;
+
+  *aInstancePtr = nullptr;
+  Accessible* acc = mMsaa->Acc();
+  if (!acc) {
+    return CO_E_OBJNOTCONNECTED;
+  }
+  AccessibleWrap* localAcc = mMsaa->LocalAcc();
+
+  // UIA IAccessibleEx
+  if (aGuidService == IID_IAccessibleEx &&
+      Preferences::GetBool("accessibility.uia.enable") && localAcc) {
+    uiaRawElmProvider* accEx = new uiaRawElmProvider(localAcc);
+    HRESULT hr = accEx->QueryInterface(aIID, aInstancePtr);
+    if (FAILED(hr)) delete accEx;
+
+    return hr;
+  }
+
+  // Provide a special service ID for getting the accessible for the browser tab
+  // document that contains this accessible object. If this accessible object
+  // is not inside a browser tab then the service fails with E_NOINTERFACE.
+  // A use case for this is for screen readers that need to switch context or
+  // 'virtual buffer' when focus moves from one browser tab area to another.
+  static const GUID SID_IAccessibleContentDocument = {
+      0xa5d8e1f3,
+      0x3571,
+      0x4d8f,
+      {0x95, 0x21, 0x07, 0xed, 0x28, 0xfb, 0x07, 0x2e}};
+  if (aGuidService == SID_IAccessibleContentDocument) {
+    if (aIID != IID_IAccessible) return E_NOINTERFACE;
+
+    Relation rel = acc->RelationByType(RelationType::CONTAINING_TAB_PANE);
+    RefPtr<IAccessible> next = MsaaAccessible::GetFrom(rel.Next());
+    if (!next) {
+      return E_NOINTERFACE;
+    }
+
+    next.forget(aInstancePtr);
+    return S_OK;
+  }
+
+  // Can get to IAccessibleApplication from any node via QS
+  // Note: in case of JAWS we want to check if aIID is
+  // IID_IAccessibleApplication.
+  if (aGuidService == IID_IAccessibleApplication ||
+      aIID == IID_IAccessibleApplication) {
+    ApplicationAccessibleWrap* applicationAcc =
+        static_cast<ApplicationAccessibleWrap*>(ApplicationAcc());
+    if (!applicationAcc) return E_NOINTERFACE;
+
+    RefPtr<IAccessible> appIa;
+    applicationAcc->GetNativeInterface(getter_AddRefs(appIa));
+    return appIa->QueryInterface(aIID, aInstancePtr);
+  }
+
+  static const GUID IID_SimpleDOMDeprecated = {
+      0x0c539790,
+      0x12e4,
+      0x11cf,
+      {0xb6, 0x61, 0x00, 0xaa, 0x00, 0x4c, 0xd6, 0xd8}};
+  if (aGuidService == IID_ISimpleDOMNode ||
+      aGuidService == IID_SimpleDOMDeprecated ||
+      aGuidService == IID_IAccessible || aGuidService == IID_IAccessible2)
+    return mMsaa->QueryInterface(aIID, aInstancePtr);
+
+  return E_INVALIDARG;
+}
+
+}  // namespace a11y
+}  // namespace mozilla