michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* vim: set ts=8 sts=2 et sw=2 tw=80: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "ServiceProvider.h"
michael@0: 
michael@0: #include "ApplicationAccessibleWrap.h"
michael@0: #include "Compatibility.h"
michael@0: #include "DocAccessible.h"
michael@0: #include "nsAccUtils.h"
michael@0: #include "nsCoreUtils.h"
michael@0: #include "Relation.h"
michael@0: #include "uiaRawElmProvider.h"
michael@0: 
michael@0: #include "mozilla/Preferences.h"
michael@0: #include "nsIDocShell.h"
michael@0: 
michael@0: #include "ISimpleDOMNode_i.c"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace a11y {
michael@0: 
michael@0: IMPL_IUNKNOWN_QUERY_HEAD(ServiceProvider)
michael@0:   IMPL_IUNKNOWN_QUERY_IFACE(IServiceProvider)
michael@0: IMPL_IUNKNOWN_QUERY_TAIL_AGGREGATED(mAccessible)
michael@0: 
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: // IServiceProvider
michael@0: 
michael@0: STDMETHODIMP
michael@0: ServiceProvider::QueryService(REFGUID aGuidService, REFIID aIID,
michael@0:                               void** aInstancePtr)
michael@0: {
michael@0:   if (!aInstancePtr)
michael@0:     return E_INVALIDARG;
michael@0: 
michael@0:   *aInstancePtr = nullptr;
michael@0: 
michael@0:   // UIA IAccessibleEx
michael@0:   if (aGuidService == IID_IAccessibleEx &&
michael@0:       Preferences::GetBool("accessibility.uia.enable")) {
michael@0:     uiaRawElmProvider* accEx = new uiaRawElmProvider(mAccessible);
michael@0:     HRESULT hr = accEx->QueryInterface(aIID, aInstancePtr);
michael@0:     if (FAILED(hr))
michael@0:       delete accEx;
michael@0: 
michael@0:     return hr;
michael@0:   }
michael@0: 
michael@0:   // Provide a special service ID for getting the accessible for the browser tab
michael@0:   // document that contains this accessible object. If this accessible object
michael@0:   // is not inside a browser tab then the service fails with E_NOINTERFACE.
michael@0:   // A use case for this is for screen readers that need to switch context or
michael@0:   // 'virtual buffer' when focus moves from one browser tab area to another.
michael@0:   static const GUID SID_IAccessibleContentDocument =
michael@0:     { 0xa5d8e1f3,0x3571,0x4d8f,{0x95,0x21,0x07,0xed,0x28,0xfb,0x07,0x2e} };
michael@0:   if (aGuidService == SID_IAccessibleContentDocument) {
michael@0:     if (aIID != IID_IAccessible)
michael@0:       return E_NOINTERFACE;
michael@0: 
michael@0:     Relation rel = mAccessible->RelationByType(RelationType::CONTAINING_TAB_PANE);
michael@0:     AccessibleWrap* tabDoc = static_cast<AccessibleWrap*>(rel.Next());
michael@0:     if (!tabDoc)
michael@0:       return E_NOINTERFACE;
michael@0: 
michael@0:     *aInstancePtr = static_cast<IAccessible*>(tabDoc);
michael@0:     (reinterpret_cast<IUnknown*>(*aInstancePtr))->AddRef();
michael@0:     return S_OK;
michael@0:   }
michael@0: 
michael@0:   // Can get to IAccessibleApplication from any node via QS
michael@0:   if (aGuidService == IID_IAccessibleApplication ||
michael@0:       (Compatibility::IsJAWS() && aIID == IID_IAccessibleApplication)) {
michael@0:     ApplicationAccessibleWrap* applicationAcc =
michael@0:       static_cast<ApplicationAccessibleWrap*>(ApplicationAcc());
michael@0:     if (!applicationAcc)
michael@0:       return E_NOINTERFACE;
michael@0: 
michael@0:     return applicationAcc->QueryInterface(aIID, aInstancePtr);
michael@0:   }
michael@0: 
michael@0:   static const GUID IID_SimpleDOMDeprecated =
michael@0:     { 0x0c539790,0x12e4,0x11cf,{0xb6,0x61,0x00,0xaa,0x00,0x4c,0xd6,0xd8} };
michael@0:   if (aGuidService == IID_ISimpleDOMNode ||
michael@0:       aGuidService == IID_SimpleDOMDeprecated ||
michael@0:       aGuidService == IID_IAccessible ||  aGuidService == IID_IAccessible2)
michael@0:     return mAccessible->QueryInterface(aIID, aInstancePtr);
michael@0: 
michael@0:   return E_INVALIDARG;
michael@0: }
michael@0: 
michael@0: } // namespace a11y
michael@0: } // namespace mozilla