1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/accessible/src/windows/msaa/ServiceProvider.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,96 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim: set ts=8 sts=2 et sw=2 tw=80: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#include "ServiceProvider.h"
1.11 +
1.12 +#include "ApplicationAccessibleWrap.h"
1.13 +#include "Compatibility.h"
1.14 +#include "DocAccessible.h"
1.15 +#include "nsAccUtils.h"
1.16 +#include "nsCoreUtils.h"
1.17 +#include "Relation.h"
1.18 +#include "uiaRawElmProvider.h"
1.19 +
1.20 +#include "mozilla/Preferences.h"
1.21 +#include "nsIDocShell.h"
1.22 +
1.23 +#include "ISimpleDOMNode_i.c"
1.24 +
1.25 +namespace mozilla {
1.26 +namespace a11y {
1.27 +
1.28 +IMPL_IUNKNOWN_QUERY_HEAD(ServiceProvider)
1.29 + IMPL_IUNKNOWN_QUERY_IFACE(IServiceProvider)
1.30 +IMPL_IUNKNOWN_QUERY_TAIL_AGGREGATED(mAccessible)
1.31 +
1.32 +
1.33 +////////////////////////////////////////////////////////////////////////////////
1.34 +// IServiceProvider
1.35 +
1.36 +STDMETHODIMP
1.37 +ServiceProvider::QueryService(REFGUID aGuidService, REFIID aIID,
1.38 + void** aInstancePtr)
1.39 +{
1.40 + if (!aInstancePtr)
1.41 + return E_INVALIDARG;
1.42 +
1.43 + *aInstancePtr = nullptr;
1.44 +
1.45 + // UIA IAccessibleEx
1.46 + if (aGuidService == IID_IAccessibleEx &&
1.47 + Preferences::GetBool("accessibility.uia.enable")) {
1.48 + uiaRawElmProvider* accEx = new uiaRawElmProvider(mAccessible);
1.49 + HRESULT hr = accEx->QueryInterface(aIID, aInstancePtr);
1.50 + if (FAILED(hr))
1.51 + delete accEx;
1.52 +
1.53 + return hr;
1.54 + }
1.55 +
1.56 + // Provide a special service ID for getting the accessible for the browser tab
1.57 + // document that contains this accessible object. If this accessible object
1.58 + // is not inside a browser tab then the service fails with E_NOINTERFACE.
1.59 + // A use case for this is for screen readers that need to switch context or
1.60 + // 'virtual buffer' when focus moves from one browser tab area to another.
1.61 + static const GUID SID_IAccessibleContentDocument =
1.62 + { 0xa5d8e1f3,0x3571,0x4d8f,{0x95,0x21,0x07,0xed,0x28,0xfb,0x07,0x2e} };
1.63 + if (aGuidService == SID_IAccessibleContentDocument) {
1.64 + if (aIID != IID_IAccessible)
1.65 + return E_NOINTERFACE;
1.66 +
1.67 + Relation rel = mAccessible->RelationByType(RelationType::CONTAINING_TAB_PANE);
1.68 + AccessibleWrap* tabDoc = static_cast<AccessibleWrap*>(rel.Next());
1.69 + if (!tabDoc)
1.70 + return E_NOINTERFACE;
1.71 +
1.72 + *aInstancePtr = static_cast<IAccessible*>(tabDoc);
1.73 + (reinterpret_cast<IUnknown*>(*aInstancePtr))->AddRef();
1.74 + return S_OK;
1.75 + }
1.76 +
1.77 + // Can get to IAccessibleApplication from any node via QS
1.78 + if (aGuidService == IID_IAccessibleApplication ||
1.79 + (Compatibility::IsJAWS() && aIID == IID_IAccessibleApplication)) {
1.80 + ApplicationAccessibleWrap* applicationAcc =
1.81 + static_cast<ApplicationAccessibleWrap*>(ApplicationAcc());
1.82 + if (!applicationAcc)
1.83 + return E_NOINTERFACE;
1.84 +
1.85 + return applicationAcc->QueryInterface(aIID, aInstancePtr);
1.86 + }
1.87 +
1.88 + static const GUID IID_SimpleDOMDeprecated =
1.89 + { 0x0c539790,0x12e4,0x11cf,{0xb6,0x61,0x00,0xaa,0x00,0x4c,0xd6,0xd8} };
1.90 + if (aGuidService == IID_ISimpleDOMNode ||
1.91 + aGuidService == IID_SimpleDOMDeprecated ||
1.92 + aGuidService == IID_IAccessible || aGuidService == IID_IAccessible2)
1.93 + return mAccessible->QueryInterface(aIID, aInstancePtr);
1.94 +
1.95 + return E_INVALIDARG;
1.96 +}
1.97 +
1.98 +} // namespace a11y
1.99 +} // namespace mozilla
