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-rw-r--r--accessible/windows/msaa/ServiceProvider.cpp106
1 files changed, 106 insertions, 0 deletions
diff --git a/accessible/windows/msaa/ServiceProvider.cpp b/accessible/windows/msaa/ServiceProvider.cpp
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+++ b/accessible/windows/msaa/ServiceProvider.cpp
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+/* -*- 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