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-rw-r--r--accessible/ipc/win/handler/AccessibleHandler.cpp2189
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diff --git a/accessible/ipc/win/handler/AccessibleHandler.cpp b/accessible/ipc/win/handler/AccessibleHandler.cpp
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+++ b/accessible/ipc/win/handler/AccessibleHandler.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/. */
+
+#if defined(MOZILLA_INTERNAL_API)
+# error This code is NOT for internal Gecko use!
+#endif // defined(MOZILLA_INTERNAL_API)
+
+#include "AccessibleHandler.h"
+#include "AccessibleHandlerControl.h"
+#include "HandlerChildEnumerator.h"
+#include "HandlerRelation.h"
+
+#include "Factory.h"
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/a11y/HandlerDataCleanup.h"
+#include "mozilla/mscom/Registration.h"
+#include "mozilla/UniquePtr.h"
+
+#include <objbase.h>
+#include <uiautomation.h>
+#include <winreg.h>
+
+#include "AccessibleHypertext.h"
+#include "AccessibleHypertext2.h"
+#include "AccessibleRole.h"
+#include "Accessible2_i.c"
+#include "Accessible2_2_i.c"
+#include "Accessible2_3_i.c"
+#include "AccessibleAction_i.c"
+#include "AccessibleHyperlink_i.c"
+#include "AccessibleHypertext_i.c"
+#include "AccessibleHypertext2_i.c"
+#include "AccessibleTable_i.c"
+#include "AccessibleTable2_i.c"
+#include "AccessibleTableCell_i.c"
+#include "AccessibleText_i.c"
+
+namespace mozilla {
+namespace a11y {
+
+// Must be kept in sync with kClassNameTabContent in
+// accessible/windows/msaa/nsWinUtils.h.
+const WCHAR kEmulatedWindowClassName[] = L"MozillaContentWindowClass";
+const uint32_t kEmulatedWindowClassNameNChars =
+ sizeof(kEmulatedWindowClassName) / sizeof(WCHAR);
+// Mask to get the content process portion of a Windows accessible unique id.
+// This is bits 23 through 30 (LSB 0) of the id. This must be kept in sync
+// with kNumContentProcessIDBits in accessible/windows/msaa/MsaaIdGenerator.cpp.
+const uint32_t kIdContentProcessMask = 0x7F800000;
+
+static mscom::Factory<AccessibleHandler> sHandlerFactory;
+
+HRESULT
+AccessibleHandler::Create(IUnknown* aOuter, REFIID aIid, void** aOutInterface) {
+ if (!aOutInterface || !aOuter || aIid != IID_IUnknown) {
+ return E_INVALIDARG;
+ }
+
+ *aOutInterface = nullptr;
+
+ HRESULT hr;
+ RefPtr<AccessibleHandler> handler(new AccessibleHandler(aOuter, &hr));
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return handler->InternalQueryInterface(aIid, aOutInterface);
+}
+
+AccessibleHandler::AccessibleHandler(IUnknown* aOuter, HRESULT* aResult)
+ : mscom::Handler(aOuter, aResult),
+ mDispatch(nullptr),
+ mIA2PassThru(nullptr),
+ mServProvPassThru(nullptr),
+ mIAHyperlinkPassThru(nullptr),
+ mIATableCellPassThru(nullptr),
+ mIAHypertextPassThru(nullptr),
+ mCachedData(),
+ mCachedDynamicDataMarshaledByCom(false),
+ mCacheGen(0),
+ mCachedHyperlinks(nullptr),
+ mCachedNHyperlinks(-1),
+ mCachedTextAttribRuns(nullptr),
+ mCachedNTextAttribRuns(-1),
+ mCachedRelations(nullptr),
+ mCachedNRelations(-1),
+ mIsEmulatedWindow(false) {
+ RefPtr<AccessibleHandlerControl> ctl(gControlFactory.GetOrCreateSingleton());
+ MOZ_ASSERT(ctl);
+ if (!ctl) {
+ if (aResult) {
+ *aResult = E_UNEXPECTED;
+ }
+ return;
+ }
+
+ mCacheGen = ctl->GetCacheGen();
+}
+
+AccessibleHandler::~AccessibleHandler() {
+ CleanupDynamicIA2Data(mCachedData.mDynamicData,
+ mCachedDynamicDataMarshaledByCom);
+ if (mCachedData.mGeckoBackChannel) {
+ mCachedData.mGeckoBackChannel->Release();
+ }
+ ClearTextCache();
+ ClearRelationCache();
+}
+
+HRESULT
+AccessibleHandler::ResolveIA2() {
+ if (mIA2PassThru) {
+ return S_OK;
+ }
+
+ RefPtr<IUnknown> proxy(GetProxy());
+ if (!proxy) {
+ return E_UNEXPECTED;
+ }
+
+ HRESULT hr = proxy->QueryInterface(NEWEST_IA2_IID,
+ reinterpret_cast<void**>(&mIA2PassThru));
+ if (SUCCEEDED(hr)) {
+ // mIA2PassThru is a weak reference (see comments in AccesssibleHandler.h)
+ mIA2PassThru->Release();
+ }
+
+ return hr;
+}
+
+HRESULT
+AccessibleHandler::ResolveIAHyperlink() {
+ if (mIAHyperlinkPassThru) {
+ return S_OK;
+ }
+
+ RefPtr<IUnknown> proxy(GetProxy());
+ if (!proxy) {
+ return E_UNEXPECTED;
+ }
+
+ HRESULT hr =
+ proxy->QueryInterface(IID_IAccessibleHyperlink,
+ reinterpret_cast<void**>(&mIAHyperlinkPassThru));
+ if (SUCCEEDED(hr)) {
+ // mIAHyperlinkPassThru is a weak reference
+ // (see comments in AccesssibleHandler.h)
+ mIAHyperlinkPassThru->Release();
+ }
+
+ return hr;
+}
+
+HRESULT
+AccessibleHandler::ResolveIATableCell() {
+ if (mIATableCellPassThru) {
+ return S_OK;
+ }
+
+ RefPtr<IUnknown> proxy(GetProxy());
+ if (!proxy) {
+ return E_UNEXPECTED;
+ }
+
+ HRESULT hr =
+ proxy->QueryInterface(IID_IAccessibleTableCell,
+ reinterpret_cast<void**>(&mIATableCellPassThru));
+ if (SUCCEEDED(hr)) {
+ // mIATableCellPassThru is a weak reference
+ // (see comments in AccesssibleHandler.h)
+ mIATableCellPassThru->Release();
+ }
+
+ return hr;
+}
+
+HRESULT
+AccessibleHandler::ResolveIAHypertext() {
+ if (mIAHypertextPassThru) {
+ return S_OK;
+ }
+
+ RefPtr<IUnknown> proxy(GetProxy());
+ if (!proxy) {
+ return E_UNEXPECTED;
+ }
+
+ HRESULT hr =
+ proxy->QueryInterface(IID_IAccessibleHypertext2,
+ reinterpret_cast<void**>(&mIAHypertextPassThru));
+ if (SUCCEEDED(hr)) {
+ // mIAHypertextPassThru is a weak reference
+ // (see comments in AccessibleHandler.h)
+ mIAHypertextPassThru->Release();
+ }
+
+ return hr;
+}
+
+HRESULT
+AccessibleHandler::MaybeUpdateCachedData() {
+ RefPtr<AccessibleHandlerControl> ctl(gControlFactory.GetOrCreateSingleton());
+ if (!ctl) {
+ return E_OUTOFMEMORY;
+ }
+
+ uint32_t gen = ctl->GetCacheGen();
+ if (gen == mCacheGen) {
+ // Cache is already up to date.
+ return S_OK;
+ }
+
+ if (!mCachedData.mGeckoBackChannel) {
+ return E_POINTER;
+ }
+
+ // While we're making the outgoing COM call below, an incoming COM call can
+ // be handled which calls ReadHandlerPayload or re-enters this function.
+ // Therefore, we mustn't update the cached data directly lest it be mutated
+ // elsewhere before the outgoing COM call returns and cause corruption or
+ // memory leaks. Instead, pass a temporary struct and update the cached data
+ // only after this call completes.
+ DynamicIA2Data newData;
+ HRESULT hr = mCachedData.mGeckoBackChannel->Refresh(&newData);
+ if (SUCCEEDED(hr)) {
+ // Clean up the old data.
+ CleanupDynamicIA2Data(mCachedData.mDynamicData,
+ mCachedDynamicDataMarshaledByCom);
+ mCachedData.mDynamicData = newData;
+ mCachedDynamicDataMarshaledByCom = true;
+ // We just updated the cache, so update this object's cache generation
+ // so we only update the cache again after the next change.
+ mCacheGen = gen;
+ }
+ return hr;
+}
+
+HRESULT
+AccessibleHandler::GetAllTextInfo(BSTR* aText) {
+ MOZ_ASSERT(mCachedData.mGeckoBackChannel);
+
+ ClearTextCache();
+
+ return mCachedData.mGeckoBackChannel->get_AllTextInfo(
+ aText, &mCachedHyperlinks, &mCachedNHyperlinks, &mCachedTextAttribRuns,
+ &mCachedNTextAttribRuns);
+}
+
+void AccessibleHandler::ClearTextCache() {
+ if (mCachedNHyperlinks >= 0) {
+ // We cached hyperlinks, but the caller never retrieved them.
+ for (long index = 0; index < mCachedNHyperlinks; ++index) {
+ mCachedHyperlinks[index]->Release();
+ }
+ // mCachedHyperlinks might already be null if there are no hyperlinks.
+ if (mCachedHyperlinks) {
+ ::CoTaskMemFree(mCachedHyperlinks);
+ mCachedHyperlinks = nullptr;
+ }
+ mCachedNHyperlinks = -1;
+ }
+
+ if (mCachedTextAttribRuns) {
+ for (long index = 0; index < mCachedNTextAttribRuns; ++index) {
+ if (mCachedTextAttribRuns[index].text) {
+ // The caller never requested this attribute run.
+ ::SysFreeString(mCachedTextAttribRuns[index].text);
+ }
+ }
+ // This array is internal to us, so we must always free it.
+ ::CoTaskMemFree(mCachedTextAttribRuns);
+ mCachedTextAttribRuns = nullptr;
+ mCachedNTextAttribRuns = -1;
+ }
+}
+
+HRESULT
+AccessibleHandler::GetRelationsInfo() {
+ MOZ_ASSERT(mCachedData.mGeckoBackChannel);
+
+ ClearRelationCache();
+
+ return mCachedData.mGeckoBackChannel->get_RelationsInfo(&mCachedRelations,
+ &mCachedNRelations);
+}
+
+void AccessibleHandler::ClearRelationCache() {
+ if (mCachedNRelations == -1) {
+ // No cache; nothing to do.
+ return;
+ }
+
+ // We cached relations, but the client never retrieved them.
+ if (mCachedRelations) {
+ for (long index = 0; index < mCachedNRelations; ++index) {
+ IARelationData& relData = mCachedRelations[index];
+ if (relData.mType) {
+ ::SysFreeString(relData.mType);
+ }
+ }
+ // This array is internal to us, so we must always free it.
+ ::CoTaskMemFree(mCachedRelations);
+ mCachedRelations = nullptr;
+ }
+ mCachedNRelations = -1;
+}
+
+HRESULT
+AccessibleHandler::ResolveIDispatch() {
+ if (mDispatch) {
+ return S_OK;
+ }
+
+ HRESULT hr;
+
+ if (!mDispatchUnk) {
+ RefPtr<AccessibleHandlerControl> ctl(
+ gControlFactory.GetOrCreateSingleton());
+ if (!ctl) {
+ return E_OUTOFMEMORY;
+ }
+
+ RefPtr<ITypeInfo> typeinfo;
+ hr = ctl->GetHandlerTypeInfo(getter_AddRefs(typeinfo));
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ hr = ::CreateStdDispatch(GetOuter(),
+ static_cast<NEWEST_IA2_INTERFACE*>(this), typeinfo,
+ getter_AddRefs(mDispatchUnk));
+ if (FAILED(hr)) {
+ return hr;
+ }
+ }
+
+ hr = mDispatchUnk->QueryInterface(IID_IDispatch,
+ reinterpret_cast<void**>(&mDispatch));
+ if (SUCCEEDED(hr)) {
+ // mDispatch is weak (see comments in AccessibleHandler.h)
+ mDispatch->Release();
+ }
+
+ return hr;
+}
+
+HRESULT
+AccessibleHandler::QueryHandlerInterface(IUnknown* aProxyUnknown, REFIID aIid,
+ void** aOutInterface) {
+ MOZ_ASSERT(aProxyUnknown);
+
+ static_assert(&NEWEST_IA2_IID == &IID_IAccessible2_3,
+ "You have modified NEWEST_IA2_IID. This code needs updating.");
+ if (aIid == IID_IDispatch || aIid == IID_IAccessible2_3 ||
+ aIid == IID_IAccessible2_2 || aIid == IID_IAccessible2 ||
+ aIid == IID_IAccessible) {
+ RefPtr<NEWEST_IA2_INTERFACE> ia2(static_cast<NEWEST_IA2_INTERFACE*>(this));
+ ia2.forget(aOutInterface);
+ return S_OK;
+ }
+
+ if (aIid == IID_IServiceProvider) {
+ RefPtr<IServiceProvider> svcProv(static_cast<IServiceProvider*>(this));
+ svcProv.forget(aOutInterface);
+ return S_OK;
+ }
+
+ if (HasPayload()) {
+ // The proxy manager caches interfaces marshaled in the payload
+ // and returns them on QI without a cross-process call.
+ // However, it doesn't know about interfaces which don't exist.
+ // We can determine this from the payload.
+ if (((aIid == IID_IAccessibleText || aIid == IID_IAccessibleHypertext ||
+ aIid == IID_IAccessibleHypertext2) &&
+ !mCachedData.mStaticData.mIAHypertext) ||
+ ((aIid == IID_IAccessibleAction || aIid == IID_IAccessibleHyperlink) &&
+ !mCachedData.mStaticData.mIAHyperlink) ||
+ (aIid == IID_IAccessibleTable && !mCachedData.mStaticData.mIATable) ||
+ (aIid == IID_IAccessibleTable2 && !mCachedData.mStaticData.mIATable2) ||
+ (aIid == IID_IAccessibleTableCell &&
+ !mCachedData.mStaticData.mIATableCell)) {
+ // We already know this interface is not available, so don't query
+ // the proxy, thus avoiding a pointless cross-process call.
+ // If we return E_NOINTERFACE here, mscom::Handler will try the COM
+ // proxy. S_FALSE signals that the proxy should not be tried.
+ return S_FALSE;
+ }
+ }
+
+ if (aIid == IID_IAccessibleAction || aIid == IID_IAccessibleHyperlink) {
+ RefPtr<IAccessibleHyperlink> iaLink(
+ static_cast<IAccessibleHyperlink*>(this));
+ iaLink.forget(aOutInterface);
+ return S_OK;
+ }
+
+ if (aIid == IID_IAccessibleTableCell) {
+ RefPtr<IAccessibleTableCell> iaCell(
+ static_cast<IAccessibleTableCell*>(this));
+ iaCell.forget(aOutInterface);
+ return S_OK;
+ }
+
+ if (aIid == IID_IAccessibleText || aIid == IID_IAccessibleHypertext ||
+ aIid == IID_IAccessibleHypertext2) {
+ RefPtr<IAccessibleHypertext2> iaHt(
+ static_cast<IAccessibleHypertext2*>(this));
+ iaHt.forget(aOutInterface);
+ return S_OK;
+ }
+
+ if (aIid == IID_IProvideClassInfo) {
+ RefPtr<IProvideClassInfo> clsInfo(this);
+ clsInfo.forget(aOutInterface);
+ return S_OK;
+ }
+
+ if (aIid == IID_IEnumVARIANT && mCachedData.mGeckoBackChannel) {
+ if (mCachedData.mDynamicData.mChildCount == 0) {
+ return E_NOINTERFACE;
+ }
+ if (!mCachedData.mStaticData.mIAHypertext &&
+ mCachedData.mDynamicData.mChildCount == 1) {
+ // This might be an OOP iframe. (We can't check the role because it might
+ // be overridden by ARIA.) HandlerChildEnumerator works fine for iframes
+ // rendered in the same content process. However, for out-of-process
+ // iframes, HandlerProvider::get_AllChildren (called by
+ // HandlerChildEnumerator) will fail. This is because we only send down
+ // an IDispatch COM proxy for the embedded document, but get_AllChildren
+ // will try to QueryInterface this to IAccessible2 to reduce QI calls
+ // from the parent process. Because the content process is sandboxed,
+ // it can't make the outgoing COM call to QI the proxy from IDispatch to
+ // IAccessible2 and so it fails.
+ // Since this Accessible only has one child anyway, we don't need the bulk
+ // fetch optimization offered by HandlerChildEnumerator or even
+ // IEnumVARIANT. Therefore, we explicitly tell the client this interface
+ // is not supported, which will cause the oleacc AccessibleChildren
+ // function to fall back to accChild. If we return E_NOINTERFACE here,
+ // mscom::Handler will try the COM proxy. S_FALSE signals that the proxy
+ // should not be tried.
+ return S_FALSE;
+ }
+ RefPtr<IEnumVARIANT> childEnum(
+ new HandlerChildEnumerator(this, mCachedData.mGeckoBackChannel));
+ childEnum.forget(aOutInterface);
+ return S_OK;
+ }
+
+ return E_NOINTERFACE;
+}
+
+HRESULT
+AccessibleHandler::ReadHandlerPayload(IStream* aStream, REFIID aIid) {
+ if (!aStream) {
+ return E_INVALIDARG;
+ }
+
+ mscom::StructFromStream deserializer(aStream);
+ if (!deserializer) {
+ return E_FAIL;
+ }
+ if (deserializer.IsEmpty()) {
+ return S_FALSE;
+ }
+
+ // QueryHandlerInterface might get called while we deserialize the payload,
+ // but that checks the interface pointers in the payload to determine what
+ // interfaces are available. Therefore, deserialize into a temporary struct
+ // and update mCachedData only after deserialization completes.
+ // The decoding functions can misbehave if their target memory is not zeroed
+ // beforehand, so ensure we do that.
+ IA2Payload newData{};
+ if (!deserializer.Read(&newData, &IA2Payload_Decode)) {
+ return E_FAIL;
+ }
+ // Clean up the old data.
+ CleanupDynamicIA2Data(mCachedData.mDynamicData,
+ mCachedDynamicDataMarshaledByCom);
+ mCachedData = newData;
+ mCachedDynamicDataMarshaledByCom = false;
+
+ // These interfaces have been aggregated into the proxy manager.
+ // The proxy manager will resolve these interfaces now on QI,
+ // so we can release these pointers.
+ // However, we don't null them out because we use their presence
+ // to determine whether the interface is available
+ // so as to avoid pointless cross-proc QI calls returning E_NOINTERFACE.
+ // Note that if pointers to other objects (in contrast to
+ // interfaces of *this* object) are added in future, we should not release
+ // those pointers.
+ ReleaseStaticIA2DataInterfaces(mCachedData.mStaticData);
+
+ WCHAR className[kEmulatedWindowClassNameNChars];
+ if (mCachedData.mDynamicData.mHwnd &&
+ ::GetClassName(
+ reinterpret_cast<HWND>(uintptr_t(mCachedData.mDynamicData.mHwnd)),
+ className, kEmulatedWindowClassNameNChars) > 0 &&
+ wcscmp(className, kEmulatedWindowClassName) == 0) {
+ mIsEmulatedWindow = true;
+ }
+
+ if (!mCachedData.mGeckoBackChannel) {
+ return S_OK;
+ }
+
+ RefPtr<AccessibleHandlerControl> ctl(gControlFactory.GetOrCreateSingleton());
+ if (!ctl) {
+ return E_OUTOFMEMORY;
+ }
+
+ if (mCachedData.mDynamicData.mIA2Role == ROLE_SYSTEM_COLUMNHEADER ||
+ mCachedData.mDynamicData.mIA2Role == ROLE_SYSTEM_ROWHEADER) {
+ // Because the same headers can apply to many cells, handler payloads
+ // include the ids of header cells, rather than potentially marshaling the
+ // same objects many times. We need to cache header cells here so we can
+ // get them by id later.
+ ctl->CacheAccessible(mCachedData.mDynamicData.mUniqueId, this);
+ }
+
+ return ctl->Register(WrapNotNull(mCachedData.mGeckoBackChannel));
+}
+
+REFIID
+AccessibleHandler::MarshalAs(REFIID aIid) {
+ static_assert(&NEWEST_IA2_IID == &IID_IAccessible2_3,
+ "You have modified NEWEST_IA2_IID. This code needs updating.");
+ if (aIid == IID_IAccessible2_3 || aIid == IID_IAccessible2_2 ||
+ aIid == IID_IAccessible2 || aIid == IID_IAccessible ||
+ aIid == IID_IDispatch) {
+ return NEWEST_IA2_IID;
+ }
+
+ return aIid;
+}
+
+HRESULT
+AccessibleHandler::GetMarshalInterface(REFIID aMarshalAsIid,
+ NotNull<IUnknown*> aProxy,
+ NotNull<IID*> aOutIid,
+ NotNull<IUnknown**> aOutUnk) {
+ if (aMarshalAsIid == NEWEST_IA2_IID) {
+ *aOutIid = IID_IAccessible;
+ } else {
+ *aOutIid = aMarshalAsIid;
+ }
+
+ return aProxy->QueryInterface(
+ aMarshalAsIid,
+ reinterpret_cast<void**>(static_cast<IUnknown**>(aOutUnk)));
+}
+
+HRESULT
+AccessibleHandler::GetHandlerPayloadSize(REFIID aIid, DWORD* aOutPayloadSize) {
+ if (!aOutPayloadSize) {
+ return E_INVALIDARG;
+ }
+
+ // If we're sending the payload to somebody else, we'd better make sure that
+ // it is up to date. If the cache update fails then we'll return a 0 payload
+ // size so that we don't transfer obsolete data.
+ if (FAILED(MaybeUpdateCachedData())) {
+ *aOutPayloadSize = mscom::StructToStream::GetEmptySize();
+ return S_OK;
+ }
+
+ mSerializer =
+ MakeUnique<mscom::StructToStream>(mCachedData, &IA2Payload_Encode);
+ if (!mSerializer) {
+ return E_FAIL;
+ }
+
+ *aOutPayloadSize = mSerializer->GetSize();
+ return S_OK;
+}
+
+HRESULT
+AccessibleHandler::WriteHandlerPayload(IStream* aStream, REFIID aIid) {
+ if (!aStream) {
+ return E_INVALIDARG;
+ }
+
+ if (!mSerializer) {
+ return E_UNEXPECTED;
+ }
+
+ HRESULT hr = mSerializer->Write(aStream);
+ mSerializer.reset();
+ return hr;
+}
+
+HRESULT
+AccessibleHandler::QueryInterface(REFIID riid, void** ppv) {
+ return Handler::QueryInterface(riid, ppv);
+}
+
+ULONG
+AccessibleHandler::AddRef() { return Handler::AddRef(); }
+
+ULONG
+AccessibleHandler::Release() { return Handler::Release(); }
+
+HRESULT
+AccessibleHandler::GetTypeInfoCount(UINT* pctinfo) {
+ HRESULT hr = ResolveIDispatch();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mDispatch->GetTypeInfoCount(pctinfo);
+}
+
+HRESULT
+AccessibleHandler::GetTypeInfo(UINT iTInfo, LCID lcid, ITypeInfo** ppTInfo) {
+ HRESULT hr = ResolveIDispatch();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mDispatch->GetTypeInfo(iTInfo, lcid, ppTInfo);
+}
+
+HRESULT
+AccessibleHandler::GetIDsOfNames(REFIID riid, LPOLESTR* rgszNames, UINT cNames,
+ LCID lcid, DISPID* rgDispId) {
+ HRESULT hr = ResolveIDispatch();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mDispatch->GetIDsOfNames(riid, rgszNames, cNames, lcid, rgDispId);
+}
+
+HRESULT
+AccessibleHandler::Invoke(DISPID dispIdMember, REFIID riid, LCID lcid,
+ WORD wFlags, DISPPARAMS* pDispParams,
+ VARIANT* pVarResult, EXCEPINFO* pExcepInfo,
+ UINT* puArgErr) {
+ HRESULT hr = ResolveIDispatch();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mDispatch->Invoke(dispIdMember, riid, lcid, wFlags, pDispParams,
+ pVarResult, pExcepInfo, puArgErr);
+}
+
+#define BEGIN_CACHE_ACCESS \
+ { \
+ HRESULT hr; \
+ if (FAILED(hr = MaybeUpdateCachedData())) { \
+ return hr; \
+ } \
+ }
+
+#define GET_FIELD(member, assignTo) \
+ { assignTo = mCachedData.mDynamicData.member; }
+
+#define GET_BSTR(member, assignTo) \
+ { assignTo = CopyBSTR(mCachedData.mDynamicData.member); }
+
+/*** IAccessible ***/
+
+HRESULT
+AccessibleHandler::get_accParent(IDispatch** ppdispParent) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_accParent(ppdispParent);
+}
+
+HRESULT
+AccessibleHandler::get_accChildCount(long* pcountChildren) {
+ if (!pcountChildren) {
+ return E_INVALIDARG;
+ }
+
+ if (!HasPayload()) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_accChildCount(pcountChildren);
+ }
+
+ BEGIN_CACHE_ACCESS;
+ if (mCachedData.mDynamicData.mIA2Role == ROLE_SYSTEM_DOCUMENT) {
+ RefPtr<AccessibleHandlerControl> ctl(
+ gControlFactory.GetOrCreateSingleton());
+ if (!ctl) {
+ return E_OUTOFMEMORY;
+ }
+ if (ctl->IsA11ySuppressedForClipboardCopy()) {
+ // Bug 1798098: Windows Suggested Actions (introduced in Windows 11
+ // 22H2) might walk the document a11y tree using UIA whenever anything
+ // is copied to the clipboard. This causes an unacceptable hang,
+ // particularly when the cache is disabled. Even though we lie about the
+ // selection in nSelections, it falls back to a normal tree walk on the
+ // document if it doesn't get a proper text selection. Prevent that by
+ // returning a 0 child count on the document.
+ *pcountChildren = 0;
+ return S_OK;
+ }
+ }
+
+ GET_FIELD(mChildCount, *pcountChildren);
+ return S_OK;
+}
+
+HRESULT
+AccessibleHandler::get_accChild(VARIANT varChild, IDispatch** ppdispChild) {
+ if (!ppdispChild) {
+ return E_INVALIDARG;
+ }
+ // Unlikely, but we might as well optimize for it
+ if (varChild.vt == VT_I4 && varChild.lVal == CHILDID_SELF) {
+ RefPtr<IDispatch> disp(this);
+ disp.forget(ppdispChild);
+ return S_OK;
+ }
+
+ if (mIsEmulatedWindow && varChild.vt == VT_I4 && varChild.lVal < 0 &&
+ (varChild.lVal & kIdContentProcessMask) !=
+ (mCachedData.mDynamicData.mUniqueId & kIdContentProcessMask)) {
+ // Window emulation is enabled and the target id is in a different
+ // process to this accessible.
+ // When window emulation is enabled, each tab document gets its own HWND.
+ // OOP iframes get the same HWND as their tab document and fire events with
+ // that HWND. However, the root accessible for the HWND (the tab document)
+ // can't return accessibles for OOP iframes. Therefore, we must get the root
+ // accessible from the main HWND and call accChild on that instead.
+ // We don't need an oleacc proxy, so send WM_GETOBJECT directly instead of
+ // calling AccessibleObjectFromEvent.
+ HWND rootHwnd = GetParent(
+ reinterpret_cast<HWND>(uintptr_t(mCachedData.mDynamicData.mHwnd)));
+ MOZ_ASSERT(rootHwnd);
+ LRESULT lresult = ::SendMessage(rootHwnd, WM_GETOBJECT, 0, OBJID_CLIENT);
+ if (lresult > 0) {
+ RefPtr<IAccessible2_3> rootAcc;
+ HRESULT hr = ::ObjectFromLresult(lresult, IID_IAccessible2_3, 0,
+ getter_AddRefs(rootAcc));
+ if (hr == S_OK) {
+ return rootAcc->get_accChild(varChild, ppdispChild);
+ }
+ }
+ }
+
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_accChild(varChild, ppdispChild);
+}
+
+HRESULT
+AccessibleHandler::get_accName(VARIANT varChild, BSTR* pszName) {
+ if (!pszName) {
+ return E_INVALIDARG;
+ }
+
+ if (varChild.lVal != CHILDID_SELF || !HasPayload()) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_accName(varChild, pszName);
+ }
+
+ BEGIN_CACHE_ACCESS;
+ GET_BSTR(mName, *pszName);
+ return S_OK;
+}
+
+HRESULT
+AccessibleHandler::get_accValue(VARIANT varChild, BSTR* pszValue) {
+ if (!pszValue) {
+ return E_INVALIDARG;
+ }
+
+ if (varChild.lVal != CHILDID_SELF || !HasPayload()) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_accValue(varChild, pszValue);
+ }
+
+ BEGIN_CACHE_ACCESS;
+ GET_BSTR(mValue, *pszValue);
+ return S_OK;
+}
+
+HRESULT
+AccessibleHandler::get_accDescription(VARIANT varChild, BSTR* pszDescription) {
+ if (!pszDescription) {
+ return E_INVALIDARG;
+ }
+
+ if (varChild.lVal != CHILDID_SELF || !HasPayload()) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_accDescription(varChild, pszDescription);
+ }
+
+ BEGIN_CACHE_ACCESS;
+ GET_BSTR(mDescription, *pszDescription);
+ return S_OK;
+}
+
+HRESULT
+AccessibleHandler::get_accRole(VARIANT varChild, VARIANT* pvarRole) {
+ if (!pvarRole) {
+ return E_INVALIDARG;
+ }
+
+ if (varChild.lVal != CHILDID_SELF || !HasPayload()) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_accRole(varChild, pvarRole);
+ }
+
+ BEGIN_CACHE_ACCESS;
+ return ::VariantCopy(pvarRole, &mCachedData.mDynamicData.mRole);
+}
+
+HRESULT
+AccessibleHandler::get_accState(VARIANT varChild, VARIANT* pvarState) {
+ if (!pvarState) {
+ return E_INVALIDARG;
+ }
+
+ if (varChild.lVal != CHILDID_SELF || !HasPayload()) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_accState(varChild, pvarState);
+ }
+
+ pvarState->vt = VT_I4;
+ BEGIN_CACHE_ACCESS;
+ GET_FIELD(mState, pvarState->lVal);
+ return S_OK;
+}
+
+HRESULT
+AccessibleHandler::get_accHelp(VARIANT varChild, BSTR* pszHelp) {
+ // This matches what AccessibleWrap does
+ if (!pszHelp) {
+ return E_INVALIDARG;
+ }
+ *pszHelp = nullptr;
+ return S_FALSE;
+}
+
+HRESULT
+AccessibleHandler::get_accHelpTopic(BSTR* pszHelpFile, VARIANT varChild,
+ long* pidTopic) {
+ // This matches what AccessibleWrap does
+ if (!pszHelpFile || !pidTopic) {
+ return E_INVALIDARG;
+ }
+ *pszHelpFile = nullptr;
+ *pidTopic = 0;
+ return S_FALSE;
+}
+
+HRESULT
+AccessibleHandler::get_accKeyboardShortcut(VARIANT varChild,
+ BSTR* pszKeyboardShortcut) {
+ if (!pszKeyboardShortcut) {
+ return E_INVALIDARG;
+ }
+
+ if (varChild.lVal != CHILDID_SELF || !HasPayload()) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_accKeyboardShortcut(varChild, pszKeyboardShortcut);
+ }
+
+ BEGIN_CACHE_ACCESS;
+ GET_BSTR(mKeyboardShortcut, *pszKeyboardShortcut);
+ return S_OK;
+}
+
+HRESULT
+AccessibleHandler::get_accFocus(VARIANT* pvarChild) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_accFocus(pvarChild);
+}
+
+HRESULT
+AccessibleHandler::get_accSelection(VARIANT* pvarChildren) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_accSelection(pvarChildren);
+}
+
+HRESULT
+AccessibleHandler::get_accDefaultAction(VARIANT varChild,
+ BSTR* pszDefaultAction) {
+ if (!pszDefaultAction) {
+ return E_INVALIDARG;
+ }
+
+ if (varChild.lVal != CHILDID_SELF || !HasPayload()) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_accDefaultAction(varChild, pszDefaultAction);
+ }
+
+ BEGIN_CACHE_ACCESS;
+ GET_BSTR(mDefaultAction, *pszDefaultAction);
+ return S_OK;
+}
+
+HRESULT
+AccessibleHandler::accSelect(long flagsSelect, VARIANT varChild) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->accSelect(flagsSelect, varChild);
+}
+
+HRESULT
+AccessibleHandler::accLocation(long* pxLeft, long* pyTop, long* pcxWidth,
+ long* pcyHeight, VARIANT varChild) {
+ if (varChild.lVal != CHILDID_SELF || !HasPayload()) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->accLocation(pxLeft, pyTop, pcxWidth, pcyHeight,
+ varChild);
+ }
+
+ if (!pxLeft || !pyTop || !pcxWidth || !pcyHeight) {
+ return E_INVALIDARG;
+ }
+
+ BEGIN_CACHE_ACCESS;
+ GET_FIELD(mLeft, *pxLeft);
+ GET_FIELD(mTop, *pyTop);
+ GET_FIELD(mWidth, *pcxWidth);
+ GET_FIELD(mHeight, *pcyHeight);
+ return S_OK;
+}
+
+HRESULT
+AccessibleHandler::accNavigate(long navDir, VARIANT varStart,
+ VARIANT* pvarEndUpAt) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->accNavigate(navDir, varStart, pvarEndUpAt);
+}
+
+HRESULT
+AccessibleHandler::accHitTest(long xLeft, long yTop, VARIANT* pvarChild) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->accHitTest(xLeft, yTop, pvarChild);
+}
+
+HRESULT
+AccessibleHandler::accDoDefaultAction(VARIANT varChild) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->accDoDefaultAction(varChild);
+}
+
+HRESULT
+AccessibleHandler::put_accName(VARIANT varChild, BSTR szName) {
+ // This matches AccessibleWrap
+ return E_NOTIMPL;
+}
+
+HRESULT
+AccessibleHandler::put_accValue(VARIANT varChild, BSTR szValue) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->put_accValue(varChild, szValue);
+}
+
+/*** IAccessible2 ***/
+
+HRESULT
+AccessibleHandler::get_nRelations(long* nRelations) {
+ if (!nRelations) {
+ return E_INVALIDARG;
+ }
+
+ HRESULT hr;
+ if (mCachedData.mGeckoBackChannel) {
+ // If the caller wants nRelations, they will almost certainly want the
+ // actual relations too.
+ hr = GetRelationsInfo();
+ if (SUCCEEDED(hr)) {
+ *nRelations = mCachedNRelations;
+ return S_OK;
+ }
+ // We fall back to a normal call if this fails.
+ }
+
+ hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_nRelations(nRelations);
+}
+
+HRESULT
+AccessibleHandler::get_relation(long relationIndex,
+ IAccessibleRelation** relation) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_relation(relationIndex, relation);
+}
+
+HRESULT
+AccessibleHandler::get_relations(long maxRelations,
+ IAccessibleRelation** relations,
+ long* nRelations) {
+ if (maxRelations == 0 || !relations || !nRelations) {
+ return E_INVALIDARG;
+ }
+
+ // We currently only support retrieval of *all* cached relations at once.
+ if (mCachedNRelations != -1 && maxRelations >= mCachedNRelations) {
+ for (long index = 0; index < mCachedNRelations; ++index) {
+ IARelationData& relData = mCachedRelations[index];
+ RefPtr<IAccessibleRelation> hrel(new HandlerRelation(this, relData));
+ hrel.forget(&relations[index]);
+ }
+ *nRelations = mCachedNRelations;
+ // Clean up the cache, since we only cache for one call.
+ // We don't use ClearRelationCache here because that scans for data to free
+ // in the array and we don't we need that. The HandlerRelation instances
+ // will handle freeing of the data.
+ ::CoTaskMemFree(mCachedRelations);
+ mCachedRelations = nullptr;
+ mCachedNRelations = -1;
+ return S_OK;
+ }
+
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_relations(maxRelations, relations, nRelations);
+}
+
+HRESULT
+AccessibleHandler::role(long* role) {
+ if (!role) {
+ return E_INVALIDARG;
+ }
+
+ if (!HasPayload()) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->role(role);
+ }
+
+ BEGIN_CACHE_ACCESS;
+ GET_FIELD(mIA2Role, *role);
+ return S_OK;
+}
+
+HRESULT
+AccessibleHandler::scrollTo(IA2ScrollType scrollType) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->scrollTo(scrollType);
+}
+
+HRESULT
+AccessibleHandler::scrollToPoint(IA2CoordinateType coordinateType, long x,
+ long y) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->scrollToPoint(coordinateType, x, y);
+}
+
+HRESULT
+AccessibleHandler::get_groupPosition(long* groupLevel,
+ long* similarItemsInGroup,
+ long* positionInGroup) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_groupPosition(groupLevel, similarItemsInGroup,
+ positionInGroup);
+}
+
+HRESULT
+AccessibleHandler::get_states(AccessibleStates* states) {
+ if (!states) {
+ return E_INVALIDARG;
+ }
+
+ if (!HasPayload()) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_states(states);
+ }
+
+ BEGIN_CACHE_ACCESS;
+ GET_FIELD(mIA2States, *states);
+ return S_OK;
+}
+
+HRESULT
+AccessibleHandler::get_extendedRole(BSTR* extendedRole) {
+ // This matches ia2Accessible
+ if (!extendedRole) {
+ return E_INVALIDARG;
+ }
+ *extendedRole = nullptr;
+ return E_NOTIMPL;
+}
+
+HRESULT
+AccessibleHandler::get_localizedExtendedRole(BSTR* localizedExtendedRole) {
+ // This matches ia2Accessible
+ if (!localizedExtendedRole) {
+ return E_INVALIDARG;
+ }
+ *localizedExtendedRole = nullptr;
+ return E_NOTIMPL;
+}
+
+HRESULT
+AccessibleHandler::get_nExtendedStates(long* nExtendedStates) {
+ // This matches ia2Accessible
+ if (!nExtendedStates) {
+ return E_INVALIDARG;
+ }
+ *nExtendedStates = 0;
+ return E_NOTIMPL;
+}
+
+HRESULT
+AccessibleHandler::get_extendedStates(long maxExtendedStates,
+ BSTR** extendedStates,
+ long* nExtendedStates) {
+ // This matches ia2Accessible
+ if (!extendedStates || !nExtendedStates) {
+ return E_INVALIDARG;
+ }
+ *extendedStates = nullptr;
+ *nExtendedStates = 0;
+ return E_NOTIMPL;
+}
+
+HRESULT
+AccessibleHandler::get_localizedExtendedStates(long maxLocalizedExtendedStates,
+ BSTR** localizedExtendedStates,
+ long* nLocalizedExtendedStates) {
+ // This matches ia2Accessible
+ if (!localizedExtendedStates || !nLocalizedExtendedStates) {
+ return E_INVALIDARG;
+ }
+ *localizedExtendedStates = nullptr;
+ *nLocalizedExtendedStates = 0;
+ return E_NOTIMPL;
+}
+
+HRESULT
+AccessibleHandler::get_uniqueID(long* uniqueID) {
+ if (!uniqueID) {
+ return E_INVALIDARG;
+ }
+ if (!HasPayload()) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_uniqueID(uniqueID);
+ }
+ *uniqueID = mCachedData.mDynamicData.mUniqueId;
+ return S_OK;
+}
+
+HRESULT
+AccessibleHandler::get_windowHandle(HWND* windowHandle) {
+ if (!windowHandle) {
+ return E_INVALIDARG;
+ }
+
+ if (!HasPayload()) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_windowHandle(windowHandle);
+ }
+
+ BEGIN_CACHE_ACCESS;
+ long hwnd = 0;
+ GET_FIELD(mHwnd, hwnd);
+ *windowHandle = reinterpret_cast<HWND>(uintptr_t(hwnd));
+ return S_OK;
+}
+
+HRESULT
+AccessibleHandler::get_indexInParent(long* indexInParent) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_indexInParent(indexInParent);
+}
+
+HRESULT
+AccessibleHandler::get_locale(IA2Locale* locale) {
+ if (!locale) {
+ return E_INVALIDARG;
+ }
+
+ if (!HasPayload()) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_locale(locale);
+ }
+
+ BEGIN_CACHE_ACCESS;
+ GET_BSTR(mIA2Locale.language, locale->language);
+ GET_BSTR(mIA2Locale.country, locale->country);
+ GET_BSTR(mIA2Locale.variant, locale->variant);
+ return S_OK;
+}
+
+HRESULT
+AccessibleHandler::get_attributes(BSTR* attributes) {
+ if (!attributes) {
+ return E_INVALIDARG;
+ }
+
+ if (!HasPayload()) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_attributes(attributes);
+ }
+
+ BEGIN_CACHE_ACCESS;
+ GET_BSTR(mAttributes, *attributes);
+ return S_OK;
+}
+
+/*** IAccessible2_2 ***/
+
+HRESULT
+AccessibleHandler::get_attribute(BSTR name, VARIANT* attribute) {
+ // Not yet implemented by ia2Accessible.
+ // Once ia2Accessible implements this, we could either pass it through
+ // or we could extract these individually from cached mAttributes.
+ // The latter should be considered if traffic warrants it.
+ return E_NOTIMPL;
+}
+
+HRESULT
+AccessibleHandler::get_accessibleWithCaret(IUnknown** accessible,
+ long* caretOffset) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_accessibleWithCaret(accessible, caretOffset);
+}
+
+HRESULT
+AccessibleHandler::get_relationTargetsOfType(BSTR type, long maxTargets,
+ IUnknown*** targets,
+ long* nTargets) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_relationTargetsOfType(type, maxTargets, targets,
+ nTargets);
+}
+
+/*** IAccessible2_3 ***/
+
+HRESULT
+AccessibleHandler::get_selectionRanges(IA2Range** ranges, long* nRanges) {
+ HRESULT hr = ResolveIA2();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIA2PassThru->get_selectionRanges(ranges, nRanges);
+}
+
+/*** IServiceProvider ***/
+
+HRESULT
+AccessibleHandler::QueryService(REFGUID aServiceId, REFIID aIid,
+ void** aOutInterface) {
+ static_assert(&NEWEST_IA2_IID == &IID_IAccessible2_3,
+ "You have modified NEWEST_IA2_IID. This code needs updating.");
+ /* We're taking advantage of the fact that we are implementing IA2 as part
+ of our own object to implement this just like a QI. */
+ if (aIid == IID_IAccessible2_3 || aIid == IID_IAccessible2_2 ||
+ aIid == IID_IAccessible2) {
+ RefPtr<NEWEST_IA2_INTERFACE> ia2(this);
+ ia2.forget(aOutInterface);
+ return S_OK;
+ }
+
+ // JAWS uses QueryService for these, but QI will work just fine and we can
+ // thus avoid a cross-process call. More importantly, if QS is used, the
+ // handler won't get used for that object, so our caching won't be used.
+ if (aIid == IID_IAccessibleAction || aIid == IID_IAccessibleText) {
+ return InternalQueryInterface(aIid, aOutInterface);
+ }
+
+ for (uint32_t i = 0; i < ArrayLength(kUnsupportedServices); ++i) {
+ if (aServiceId == kUnsupportedServices[i]) {
+ return E_NOINTERFACE;
+ }
+ }
+
+ if (!mServProvPassThru) {
+ RefPtr<IUnknown> proxy(GetProxy());
+ if (!proxy) {
+ return E_UNEXPECTED;
+ }
+
+ HRESULT hr = proxy->QueryInterface(
+ IID_IServiceProvider, reinterpret_cast<void**>(&mServProvPassThru));
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ // mServProvPassThru is a weak reference (see comments in
+ // AccessibleHandler.h)
+ mServProvPassThru->Release();
+ }
+
+ return mServProvPassThru->QueryService(aServiceId, aIid, aOutInterface);
+}
+
+/*** IProvideClassInfo ***/
+
+HRESULT
+AccessibleHandler::GetClassInfo(ITypeInfo** aOutTypeInfo) {
+ RefPtr<AccessibleHandlerControl> ctl(gControlFactory.GetOrCreateSingleton());
+ if (!ctl) {
+ return E_OUTOFMEMORY;
+ }
+
+ return ctl->GetHandlerTypeInfo(aOutTypeInfo);
+}
+
+/*** IAccessibleAction ***/
+
+HRESULT
+AccessibleHandler::nActions(long* nActions) {
+ if (!nActions) {
+ return E_INVALIDARG;
+ }
+
+ if (!HasPayload()) {
+ HRESULT hr = ResolveIAHyperlink();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIAHyperlinkPassThru->nActions(nActions);
+ }
+
+ BEGIN_CACHE_ACCESS;
+ GET_FIELD(mNActions, *nActions);
+ return S_OK;
+}
+
+HRESULT
+AccessibleHandler::doAction(long actionIndex) {
+ HRESULT hr = ResolveIAHyperlink();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIAHyperlinkPassThru->doAction(actionIndex);
+}
+
+HRESULT
+AccessibleHandler::get_description(long actionIndex, BSTR* description) {
+ HRESULT hr = ResolveIAHyperlink();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIAHyperlinkPassThru->get_description(actionIndex, description);
+}
+
+HRESULT
+AccessibleHandler::get_keyBinding(long actionIndex, long nMaxBindings,
+ BSTR** keyBindings, long* nBindings) {
+ HRESULT hr = ResolveIAHyperlink();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIAHyperlinkPassThru->get_keyBinding(actionIndex, nMaxBindings,
+ keyBindings, nBindings);
+}
+
+HRESULT
+AccessibleHandler::get_name(long actionIndex, BSTR* name) {
+ if (!name) {
+ return E_INVALIDARG;
+ }
+
+ if (HasPayload()) {
+ if (actionIndex >= mCachedData.mDynamicData.mNActions) {
+ // Action does not exist.
+ return E_INVALIDARG;
+ }
+
+ if (actionIndex == 0) {
+ // same as accDefaultAction.
+ GET_BSTR(mDefaultAction, *name);
+ return S_OK;
+ }
+ }
+
+ // At this point, there's either no payload or actionIndex is > 0.
+ HRESULT hr = ResolveIAHyperlink();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIAHyperlinkPassThru->get_name(actionIndex, name);
+}
+
+HRESULT
+AccessibleHandler::get_localizedName(long actionIndex, BSTR* localizedName) {
+ HRESULT hr = ResolveIAHyperlink();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIAHyperlinkPassThru->get_localizedName(actionIndex, localizedName);
+}
+
+/*** IAccessibleHyperlink ***/
+
+HRESULT
+AccessibleHandler::get_anchor(long index, VARIANT* anchor) {
+ HRESULT hr = ResolveIAHyperlink();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIAHyperlinkPassThru->get_anchor(index, anchor);
+}
+
+HRESULT
+AccessibleHandler::get_anchorTarget(long index, VARIANT* anchorTarget) {
+ HRESULT hr = ResolveIAHyperlink();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIAHyperlinkPassThru->get_anchorTarget(index, anchorTarget);
+}
+
+HRESULT
+AccessibleHandler::get_startIndex(long* index) {
+ HRESULT hr = ResolveIAHyperlink();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIAHyperlinkPassThru->get_startIndex(index);
+}
+
+HRESULT
+AccessibleHandler::get_endIndex(long* index) {
+ HRESULT hr = ResolveIAHyperlink();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIAHyperlinkPassThru->get_endIndex(index);
+}
+
+HRESULT
+AccessibleHandler::get_valid(boolean* valid) {
+ HRESULT hr = ResolveIAHyperlink();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIAHyperlinkPassThru->get_valid(valid);
+}
+
+/*** IAccessibleTableCell ***/
+
+HRESULT
+AccessibleHandler::get_columnExtent(long* nColumnsSpanned) {
+ if (!nColumnsSpanned) {
+ return E_INVALIDARG;
+ }
+
+ if (!HasPayload()) {
+ HRESULT hr = ResolveIATableCell();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIATableCellPassThru->get_columnExtent(nColumnsSpanned);
+ }
+
+ BEGIN_CACHE_ACCESS;
+ GET_FIELD(mColumnExtent, *nColumnsSpanned);
+ return S_OK;
+}
+
+HRESULT
+AccessibleHandler::get_columnHeaderCells(IUnknown*** cellAccessibles,
+ long* nColumnHeaderCells) {
+ if (!cellAccessibles || !nColumnHeaderCells) {
+ return E_INVALIDARG;
+ }
+
+ HRESULT hr = S_OK;
+ if (HasPayload()) {
+ RefPtr<AccessibleHandlerControl> ctl(
+ gControlFactory.GetOrCreateSingleton());
+ if (!ctl) {
+ return E_OUTOFMEMORY;
+ }
+ *nColumnHeaderCells = mCachedData.mDynamicData.mNColumnHeaderCells;
+ *cellAccessibles = static_cast<IUnknown**>(
+ ::CoTaskMemAlloc(sizeof(IUnknown*) * *nColumnHeaderCells));
+ long i;
+ for (i = 0; i < *nColumnHeaderCells; ++i) {
+ RefPtr<AccessibleHandler> headerAcc;
+ hr = ctl->GetCachedAccessible(
+ mCachedData.mDynamicData.mColumnHeaderCellIds[i],
+ getter_AddRefs(headerAcc));
+ if (FAILED(hr)) {
+ break;
+ }
+ hr = headerAcc->QueryInterface(IID_IUnknown,
+ (void**)&(*cellAccessibles)[i]);
+ if (FAILED(hr)) {
+ break;
+ }
+ }
+ if (SUCCEEDED(hr)) {
+ return S_OK;
+ }
+ // If we failed to get any of the headers from the cache, don't use the
+ // cache at all. We need to clean up anything we did so far.
+ long failedHeader = i;
+ for (i = 0; i < failedHeader; ++i) {
+ (*cellAccessibles)[i]->Release();
+ }
+ ::CoTaskMemFree(*cellAccessibles);
+ *cellAccessibles = nullptr;
+ }
+
+ hr = ResolveIATableCell();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIATableCellPassThru->get_columnHeaderCells(cellAccessibles,
+ nColumnHeaderCells);
+}
+
+HRESULT
+AccessibleHandler::get_columnIndex(long* columnIndex) {
+ if (!columnIndex) {
+ return E_INVALIDARG;
+ }
+
+ if (!HasPayload()) {
+ HRESULT hr = ResolveIATableCell();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIATableCellPassThru->get_columnIndex(columnIndex);
+ }
+
+ BEGIN_CACHE_ACCESS;
+ GET_FIELD(mColumnIndex, *columnIndex);
+ return S_OK;
+}
+
+HRESULT
+AccessibleHandler::get_rowExtent(long* nRowsSpanned) {
+ if (!nRowsSpanned) {
+ return E_INVALIDARG;
+ }
+
+ if (!HasPayload()) {
+ HRESULT hr = ResolveIATableCell();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIATableCellPassThru->get_rowExtent(nRowsSpanned);
+ }
+
+ BEGIN_CACHE_ACCESS;
+ GET_FIELD(mRowExtent, *nRowsSpanned);
+ return S_OK;
+}
+
+HRESULT
+AccessibleHandler::get_rowHeaderCells(IUnknown*** cellAccessibles,
+ long* nRowHeaderCells) {
+ if (!cellAccessibles || !nRowHeaderCells) {
+ return E_INVALIDARG;
+ }
+
+ HRESULT hr = S_OK;
+ if (HasPayload()) {
+ RefPtr<AccessibleHandlerControl> ctl(
+ gControlFactory.GetOrCreateSingleton());
+ if (!ctl) {
+ return E_OUTOFMEMORY;
+ }
+ *nRowHeaderCells = mCachedData.mDynamicData.mNRowHeaderCells;
+ *cellAccessibles = static_cast<IUnknown**>(
+ ::CoTaskMemAlloc(sizeof(IUnknown*) * *nRowHeaderCells));
+ long i;
+ for (i = 0; i < *nRowHeaderCells; ++i) {
+ RefPtr<AccessibleHandler> headerAcc;
+ hr = ctl->GetCachedAccessible(
+ mCachedData.mDynamicData.mRowHeaderCellIds[i],
+ getter_AddRefs(headerAcc));
+ if (FAILED(hr)) {
+ break;
+ }
+ hr = headerAcc->QueryInterface(IID_IUnknown,
+ (void**)&(*cellAccessibles)[i]);
+ if (FAILED(hr)) {
+ break;
+ }
+ }
+ if (SUCCEEDED(hr)) {
+ return S_OK;
+ }
+ // If we failed to get any of the headers from the cache, don't use the
+ // cache at all. We need to clean up anything we did so far.
+ long failedHeader = i;
+ for (i = 0; i < failedHeader; ++i) {
+ (*cellAccessibles)[i]->Release();
+ }
+ ::CoTaskMemFree(*cellAccessibles);
+ *cellAccessibles = nullptr;
+ }
+
+ hr = ResolveIATableCell();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIATableCellPassThru->get_rowHeaderCells(cellAccessibles,
+ nRowHeaderCells);
+}
+
+HRESULT
+AccessibleHandler::get_rowIndex(long* rowIndex) {
+ if (!rowIndex) {
+ return E_INVALIDARG;
+ }
+
+ if (!HasPayload()) {
+ HRESULT hr = ResolveIATableCell();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIATableCellPassThru->get_rowIndex(rowIndex);
+ }
+
+ BEGIN_CACHE_ACCESS;
+ GET_FIELD(mRowIndex, *rowIndex);
+ return S_OK;
+}
+
+HRESULT
+AccessibleHandler::get_isSelected(boolean* isSelected) {
+ if (!isSelected) {
+ return E_INVALIDARG;
+ }
+
+ if (!HasPayload()) {
+ HRESULT hr = ResolveIATableCell();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIATableCellPassThru->get_isSelected(isSelected);
+ }
+
+ BEGIN_CACHE_ACCESS;
+ GET_FIELD(mCellIsSelected, *isSelected);
+ return S_OK;
+}
+
+HRESULT
+AccessibleHandler::get_rowColumnExtents(long* row, long* column,
+ long* rowExtents, long* columnExtents,
+ boolean* isSelected) {
+ if (!row || !column || !rowExtents || !columnExtents || !isSelected) {
+ return E_INVALIDARG;
+ }
+
+ if (!HasPayload()) {
+ HRESULT hr = ResolveIATableCell();
+ if (FAILED(hr)) {
+ return hr;
+ }
+ return mIATableCellPassThru->get_rowColumnExtents(
+ row, column, rowExtents, columnExtents, isSelected);
+ }
+
+ BEGIN_CACHE_ACCESS;
+ GET_FIELD(mRowIndex, *row);
+ GET_FIELD(mColumnIndex, *column);
+ GET_FIELD(mRowExtent, *rowExtents);
+ GET_FIELD(mColumnExtent, *columnExtents);
+ GET_FIELD(mCellIsSelected, *isSelected);
+ return S_OK;
+}
+
+HRESULT
+AccessibleHandler::get_table(IUnknown** table) {
+ HRESULT hr = ResolveIATableCell();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIATableCellPassThru->get_table(table);
+}
+
+/*** IAccessibleText ***/
+
+HRESULT
+AccessibleHandler::addSelection(long startOffset, long endOffset) {
+ HRESULT hr = ResolveIAHypertext();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIAHypertextPassThru->addSelection(startOffset, endOffset);
+}
+
+HRESULT
+AccessibleHandler::get_attributes(long offset, long* startOffset,
+ long* endOffset, BSTR* textAttributes) {
+ if (!startOffset || !endOffset || !textAttributes) {
+ return E_INVALIDARG;
+ }
+
+ if (mCachedNTextAttribRuns >= 0) {
+ // We have cached attributes.
+ for (long index = 0; index < mCachedNTextAttribRuns; ++index) {
+ auto& attribRun = mCachedTextAttribRuns[index];
+ if (attribRun.start <= offset && offset < attribRun.end) {
+ *startOffset = attribRun.start;
+ *endOffset = attribRun.end;
+ *textAttributes = attribRun.text;
+ // The caller will clean this up.
+ // (We only keep each cached attribute run for one call.)
+ attribRun.text = nullptr;
+ // The cache for this run is now invalid, so don't visit it again.
+ attribRun.end = 0;
+ return S_OK;
+ }
+ }
+ }
+
+ HRESULT hr = ResolveIAHypertext();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIAHypertextPassThru->get_attributes(offset, startOffset, endOffset,
+ textAttributes);
+}
+
+HRESULT
+AccessibleHandler::get_caretOffset(long* offset) {
+ HRESULT hr = ResolveIAHypertext();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIAHypertextPassThru->get_caretOffset(offset);
+}
+
+HRESULT
+AccessibleHandler::get_characterExtents(long offset,
+ enum IA2CoordinateType coordType,
+ long* x, long* y, long* width,
+ long* height) {
+ HRESULT hr = ResolveIAHypertext();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIAHypertextPassThru->get_characterExtents(offset, coordType, x, y,
+ width, height);
+}
+
+HRESULT
+AccessibleHandler::get_nSelections(long* nSelections) {
+ HRESULT hr = ResolveIAHypertext();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ hr = mIAHypertextPassThru->get_nSelections(nSelections);
+ if (SUCCEEDED(hr) && *nSelections == 0 && HasPayload()) {
+ BEGIN_CACHE_ACCESS;
+ if (mCachedData.mDynamicData.mIA2Role == ROLE_SYSTEM_DOCUMENT) {
+ RefPtr<AccessibleHandlerControl> ctl(
+ gControlFactory.GetOrCreateSingleton());
+ if (!ctl) {
+ return E_OUTOFMEMORY;
+ }
+ if (ctl->IsA11ySuppressedForClipboardCopy()) {
+ // Bug 1798098: Windows Suggested Actions (introduced in Windows 11
+ // 22H2) might walk the document a11y tree using UIA whenever anything
+ // is copied to the clipboard. This causes an unacceptable hang,
+ // particularly when the cache is disabled. It walks using
+ // IAccessibleText/IAccessibleHyperText if the document reports no
+ // selection, so we lie here and say that there is a selection even
+ // though there isn't. It will subsequently call get_selection, which
+ // will fail, but this hack here seems to be enough to avoid further
+ // text calls.
+ *nSelections = 1;
+ }
+ }
+ }
+ return hr;
+}
+
+HRESULT
+AccessibleHandler::get_offsetAtPoint(long x, long y,
+ enum IA2CoordinateType coordType,
+ long* offset) {
+ HRESULT hr = ResolveIAHypertext();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIAHypertextPassThru->get_offsetAtPoint(x, y, coordType, offset);
+}
+
+HRESULT
+AccessibleHandler::get_selection(long selectionIndex, long* startOffset,
+ long* endOffset) {
+ HRESULT hr = ResolveIAHypertext();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIAHypertextPassThru->get_selection(selectionIndex, startOffset,
+ endOffset);
+}
+
+HRESULT
+AccessibleHandler::get_text(long startOffset, long endOffset, BSTR* text) {
+ if (!text) {
+ return E_INVALIDARG;
+ }
+
+ HRESULT hr;
+ if (mCachedData.mGeckoBackChannel && startOffset == 0 &&
+ endOffset == IA2_TEXT_OFFSET_LENGTH) {
+ // If the caller is retrieving all text, they will probably want all
+ // hyperlinks and attributes as well.
+ hr = GetAllTextInfo(text);
+ if (SUCCEEDED(hr)) {
+ return hr;
+ }
+ // We fall back to a normal call if this fails.
+ }
+
+ hr = ResolveIAHypertext();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIAHypertextPassThru->get_text(startOffset, endOffset, text);
+}
+
+HRESULT
+AccessibleHandler::get_textBeforeOffset(long offset,
+ enum IA2TextBoundaryType boundaryType,
+ long* startOffset, long* endOffset,
+ BSTR* text) {
+ HRESULT hr = ResolveIAHypertext();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIAHypertextPassThru->get_textBeforeOffset(
+ offset, boundaryType, startOffset, endOffset, text);
+}
+
+HRESULT
+AccessibleHandler::get_textAfterOffset(long offset,
+ enum IA2TextBoundaryType boundaryType,
+ long* startOffset, long* endOffset,
+ BSTR* text) {
+ HRESULT hr = ResolveIAHypertext();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIAHypertextPassThru->get_textAfterOffset(
+ offset, boundaryType, startOffset, endOffset, text);
+}
+
+HRESULT
+AccessibleHandler::get_textAtOffset(long offset,
+ enum IA2TextBoundaryType boundaryType,
+ long* startOffset, long* endOffset,
+ BSTR* text) {
+ HRESULT hr = ResolveIAHypertext();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIAHypertextPassThru->get_textAtOffset(offset, boundaryType,
+ startOffset, endOffset, text);
+}
+
+HRESULT
+AccessibleHandler::removeSelection(long selectionIndex) {
+ HRESULT hr = ResolveIAHypertext();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIAHypertextPassThru->removeSelection(selectionIndex);
+}
+
+HRESULT
+AccessibleHandler::setCaretOffset(long offset) {
+ HRESULT hr = ResolveIAHypertext();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIAHypertextPassThru->setCaretOffset(offset);
+}
+
+HRESULT
+AccessibleHandler::setSelection(long selectionIndex, long startOffset,
+ long endOffset) {
+ HRESULT hr = ResolveIAHypertext();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIAHypertextPassThru->setSelection(selectionIndex, startOffset,
+ endOffset);
+}
+
+HRESULT
+AccessibleHandler::get_nCharacters(long* nCharacters) {
+ HRESULT hr = ResolveIAHypertext();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIAHypertextPassThru->get_nCharacters(nCharacters);
+}
+
+HRESULT
+AccessibleHandler::scrollSubstringTo(long startIndex, long endIndex,
+ enum IA2ScrollType scrollType) {
+ HRESULT hr = ResolveIAHypertext();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIAHypertextPassThru->scrollSubstringTo(startIndex, endIndex,
+ scrollType);
+}
+
+HRESULT
+AccessibleHandler::scrollSubstringToPoint(long startIndex, long endIndex,
+ enum IA2CoordinateType coordinateType,
+ long x, long y) {
+ HRESULT hr = ResolveIAHypertext();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIAHypertextPassThru->scrollSubstringToPoint(startIndex, endIndex,
+ coordinateType, x, y);
+}
+
+HRESULT
+AccessibleHandler::get_newText(IA2TextSegment* newText) {
+ if (!newText) {
+ return E_INVALIDARG;
+ }
+
+ RefPtr<AccessibleHandlerControl> ctl(gControlFactory.GetSingleton());
+ MOZ_ASSERT(ctl);
+ if (!ctl) {
+ return S_OK;
+ }
+
+ long id;
+ HRESULT hr = this->get_uniqueID(&id);
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return ctl->GetNewText(id, WrapNotNull(newText));
+}
+
+HRESULT
+AccessibleHandler::get_oldText(IA2TextSegment* oldText) {
+ if (!oldText) {
+ return E_INVALIDARG;
+ }
+
+ RefPtr<AccessibleHandlerControl> ctl(gControlFactory.GetSingleton());
+ MOZ_ASSERT(ctl);
+ if (!ctl) {
+ return S_OK;
+ }
+
+ long id;
+ HRESULT hr = this->get_uniqueID(&id);
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return ctl->GetOldText(id, WrapNotNull(oldText));
+}
+
+/*** IAccessibleHypertext ***/
+
+HRESULT
+AccessibleHandler::get_nHyperlinks(long* hyperlinkCount) {
+ HRESULT hr = ResolveIAHypertext();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIAHypertextPassThru->get_nHyperlinks(hyperlinkCount);
+}
+
+HRESULT
+AccessibleHandler::get_hyperlink(long index, IAccessibleHyperlink** hyperlink) {
+ HRESULT hr = ResolveIAHypertext();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIAHypertextPassThru->get_hyperlink(index, hyperlink);
+}
+
+HRESULT
+AccessibleHandler::get_hyperlinkIndex(long charIndex, long* hyperlinkIndex) {
+ HRESULT hr = ResolveIAHypertext();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIAHypertextPassThru->get_hyperlinkIndex(charIndex, hyperlinkIndex);
+}
+
+/*** IAccessibleHypertext2 ***/
+
+HRESULT
+AccessibleHandler::get_hyperlinks(IAccessibleHyperlink*** hyperlinks,
+ long* nHyperlinks) {
+ if (!hyperlinks || !nHyperlinks) {
+ return E_INVALIDARG;
+ }
+
+ if (mCachedNHyperlinks >= 0) {
+ // We have cached hyperlinks.
+ *hyperlinks = mCachedHyperlinks;
+ *nHyperlinks = mCachedNHyperlinks;
+ // The client will clean these up. (We only keep the cache for one call.)
+ mCachedHyperlinks = nullptr;
+ mCachedNHyperlinks = -1;
+ return mCachedNHyperlinks == 0 ? S_FALSE : S_OK;
+ }
+
+ HRESULT hr = ResolveIAHypertext();
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return mIAHypertextPassThru->get_hyperlinks(hyperlinks, nHyperlinks);
+}
+
+} // namespace a11y
+} // namespace mozilla
+
+extern "C" HRESULT __stdcall ProxyDllCanUnloadNow();
+
+extern "C" HRESULT __stdcall DllCanUnloadNow() {
+ return mozilla::mscom::Module::CanUnload() && ProxyDllCanUnloadNow();
+}
+
+extern "C" HRESULT __stdcall ProxyDllGetClassObject(REFCLSID aClsid,
+ REFIID aIid,
+ LPVOID* aOutInterface);
+
+extern "C" HRESULT __stdcall DllGetClassObject(REFCLSID aClsid, REFIID aIid,
+ LPVOID* aOutInterface) {
+ if (aClsid == CLSID_AccessibleHandler) {
+ return mozilla::a11y::sHandlerFactory.QueryInterface(aIid, aOutInterface);
+ }
+ return ProxyDllGetClassObject(aClsid, aIid, aOutInterface);
+}
+
+extern "C" BOOL WINAPI ProxyDllMain(HINSTANCE aInstDll, DWORD aReason,
+ LPVOID aReserved);
+
+BOOL WINAPI DllMain(HINSTANCE aInstDll, DWORD aReason, LPVOID aReserved) {
+ if (aReason == DLL_PROCESS_ATTACH) {
+ DisableThreadLibraryCalls((HMODULE)aInstDll);
+ }
+ // This is required for ProxyDllRegisterServer to work correctly
+ return ProxyDllMain(aInstDll, aReason, aReserved);
+}
+
+extern "C" HRESULT __stdcall ProxyDllRegisterServer();
+
+extern "C" HRESULT __stdcall DllRegisterServer() {
+ HRESULT hr = mozilla::mscom::Handler::Register(CLSID_AccessibleHandler);
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return ProxyDllRegisterServer();
+}
+
+extern "C" HRESULT __stdcall ProxyDllUnregisterServer();
+
+extern "C" HRESULT __stdcall DllUnregisterServer() {
+ HRESULT hr = mozilla::mscom::Handler::Unregister(CLSID_AccessibleHandler);
+ if (FAILED(hr)) {
+ return hr;
+ }
+
+ return ProxyDllUnregisterServer();
+}
+
+extern "C" HRESULT __stdcall RegisterMsix() {
+ return mozilla::mscom::Handler::Register(CLSID_AccessibleHandler,
+ /* aMsixContainer */ true);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 05:20:16 +0000