/* -*- 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 "ApplicationAccessibleWrap.h" #include "Compatibility.h" #include "DocAccessible.h" #include "nsAccUtils.h" #include "nsCoreUtils.h" #include "Relation.h" #include "uiaRawElmProvider.h" #include "mozilla/Preferences.h" #include "nsIDocShell.h" #include "ISimpleDOMNode_i.c" namespace mozilla { namespace a11y { IMPL_IUNKNOWN_QUERY_HEAD(ServiceProvider) IMPL_IUNKNOWN_QUERY_IFACE(IServiceProvider) IMPL_IUNKNOWN_QUERY_TAIL_AGGREGATED(mAccessible) //////////////////////////////////////////////////////////////////////////////// // IServiceProvider STDMETHODIMP ServiceProvider::QueryService(REFGUID aGuidService, REFIID aIID, void** aInstancePtr) { if (!aInstancePtr) return E_INVALIDARG; *aInstancePtr = nullptr; // UIA IAccessibleEx if (aGuidService == IID_IAccessibleEx && Preferences::GetBool("accessibility.uia.enable")) { uiaRawElmProvider* accEx = new uiaRawElmProvider(mAccessible); 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 = mAccessible->RelationByType(RelationType::CONTAINING_TAB_PANE); AccessibleWrap* tabDoc = static_cast<AccessibleWrap*>(rel.Next()); if (!tabDoc) return E_NOINTERFACE; *aInstancePtr = static_cast<IAccessible*>(tabDoc); (reinterpret_cast<IUnknown*>(*aInstancePtr))->AddRef(); return S_OK; } // Can get to IAccessibleApplication from any node via QS if (aGuidService == IID_IAccessibleApplication || (Compatibility::IsJAWS() && aIID == IID_IAccessibleApplication)) { ApplicationAccessibleWrap* applicationAcc = static_cast<ApplicationAccessibleWrap*>(ApplicationAcc()); if (!applicationAcc) return E_NOINTERFACE; return applicationAcc->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 mAccessible->QueryInterface(aIID, aInstancePtr); return E_INVALIDARG; } } // namespace a11y } // namespace mozilla