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uiautomationcore: Create UI Automation client thread.

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Signed-off-by: Connor McAdams <cmcadams@codeweavers.com>
This commit is contained in:
Connor McAdams 2022-09-12 12:51:09 -04:00 committed by Alexandre Julliard
parent 41dd89a8e4
commit 8642e96c19
1 changed files with 168 additions and 1 deletions
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169
dlls/uiautomationcore/uia_client.c
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@ -427,6 +427,7 @@ static ULONG WINAPI uia_provider_AddRef(IWineUiaProvider *iface)
return ref;
}
static void uia_stop_client_thread(void);
static ULONG WINAPI uia_provider_Release(IWineUiaProvider *iface)
{
struct uia_provider *prov = impl_from_IWineUiaProvider(iface);
@ -436,7 +437,10 @@ static ULONG WINAPI uia_provider_Release(IWineUiaProvider *iface)
if (!ref)
{
if (prov->node)
{
IWineUiaNode_Release(prov->node);
uia_stop_client_thread();
}
else
IRawElementProviderSimple_Release(prov->elprov);
heap_free(prov);
@ -772,6 +776,154 @@ HRESULT WINAPI UiaNodeFromProvider(IRawElementProviderSimple *elprov, HUIANODE *
return hr;
}
/*
* UI Automation client thread functions.
*/
struct uia_client_thread
{
CO_MTA_USAGE_COOKIE mta_cookie;
HANDLE hthread;
HWND hwnd;
LONG ref;
};
static struct uia_client_thread client_thread;
static CRITICAL_SECTION client_thread_cs;
static CRITICAL_SECTION_DEBUG client_thread_cs_debug =
{
0, 0, &client_thread_cs,
{ &client_thread_cs_debug.ProcessLocksList, &client_thread_cs_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": client_thread_cs") }
};
static CRITICAL_SECTION client_thread_cs = { &client_thread_cs_debug, -1, 0, 0, 0, 0 };
#define WM_UIA_CLIENT_GET_NODE_PROV (WM_USER + 1)
#define WM_UIA_CLIENT_THREAD_STOP (WM_USER + 2)
static HRESULT create_wine_uia_nested_node_provider(struct uia_node *node, LRESULT lr);
static LRESULT CALLBACK uia_client_thread_msg_proc(HWND hwnd, UINT msg, WPARAM wparam,
LPARAM lparam)
{
switch (msg)
{
case WM_UIA_CLIENT_GET_NODE_PROV:
return create_wine_uia_nested_node_provider((struct uia_node *)lparam, (LRESULT)wparam);
default:
break;
}
return DefWindowProcW(hwnd, msg, wparam, lparam);
}
static DWORD WINAPI uia_client_thread_proc(void *arg)
{
HANDLE initialized_event = arg;
HWND hwnd;
MSG msg;
hwnd = CreateWindowW(L"Message", NULL, 0, 0, 0, 0, 0, HWND_MESSAGE, NULL, NULL, NULL);
if (!hwnd)
{
WARN("CreateWindow failed: %ld\n", GetLastError());
FreeLibraryAndExitThread(huia_module, 1);
}
SetWindowLongPtrW(hwnd, GWLP_WNDPROC, (LONG_PTR)uia_client_thread_msg_proc);
client_thread.hwnd = hwnd;
/* Initialization complete, thread can now process window messages. */
SetEvent(initialized_event);
TRACE("Client thread started.\n");
while (GetMessageW(&msg, NULL, 0, 0))
{
if (msg.message == WM_UIA_CLIENT_THREAD_STOP)
break;
TranslateMessage(&msg);
DispatchMessageW(&msg);
}
TRACE("Shutting down UI Automation client thread.\n");
DestroyWindow(hwnd);
FreeLibraryAndExitThread(huia_module, 0);
}
static BOOL uia_start_client_thread(void)
{
BOOL started = TRUE;
EnterCriticalSection(&client_thread_cs);
if (++client_thread.ref == 1)
{
HANDLE ready_event = NULL;
HANDLE events[2];
HMODULE hmodule;
DWORD wait_obj;
HRESULT hr;
/*
* We use CoIncrementMTAUsage here instead of CoInitialize because it
* allows us to exit the implicit MTA immediately when the thread
* reference count hits 0, rather than waiting for the thread to
* shutdown and call CoUninitialize like the provider thread.
*/
hr = CoIncrementMTAUsage(&client_thread.mta_cookie);
if (FAILED(hr))
{
started = FALSE;
goto exit;
}
/* Increment DLL reference count. */
GetModuleHandleExW(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS,
(const WCHAR *)uia_start_client_thread, &hmodule);
events[0] = ready_event = CreateEventW(NULL, FALSE, FALSE, NULL);
if (!(client_thread.hthread = CreateThread(NULL, 0, uia_client_thread_proc,
ready_event, 0, NULL)))
{
FreeLibrary(hmodule);
started = FALSE;
goto exit;
}
events[1] = client_thread.hthread;
wait_obj = WaitForMultipleObjects(2, events, FALSE, INFINITE);
if (wait_obj != WAIT_OBJECT_0)
{
CloseHandle(client_thread.hthread);
started = FALSE;
}
exit:
if (ready_event)
CloseHandle(ready_event);
if (!started)
{
WARN("Failed to start client thread\n");
if (client_thread.mta_cookie)
CoDecrementMTAUsage(client_thread.mta_cookie);
memset(&client_thread, 0, sizeof(client_thread));
}
}
LeaveCriticalSection(&client_thread_cs);
return started;
}
static void uia_stop_client_thread(void)
{
EnterCriticalSection(&client_thread_cs);
if (!--client_thread.ref)
{
PostMessageW(client_thread.hwnd, WM_UIA_CLIENT_THREAD_STOP, 0, 0);
CoDecrementMTAUsage(client_thread.mta_cookie);
CloseHandle(client_thread.hthread);
memset(&client_thread, 0, sizeof(client_thread));
}
LeaveCriticalSection(&client_thread_cs);
}
static HRESULT create_wine_uia_nested_node_provider(struct uia_node *node, LRESULT lr)
{
IGlobalInterfaceTable *git;
@ -781,7 +933,10 @@ static HRESULT create_wine_uia_nested_node_provider(struct uia_node *node, LRESU
hr = ObjectFromLresult(lr, &IID_IWineUiaNode, 0, (void **)&nested_node);
if (FAILED(hr))
{
uia_stop_client_thread();
return hr;
}
prov = heap_alloc_zero(sizeof(*prov));
if (!prov)
@ -809,22 +964,34 @@ exit:
return hr;
}
/*
* UiaNodeFromHandle is expected to work even if the calling thread hasn't
* initialized COM. We marshal our node on a separate thread that initializes
* COM for this reason.
*/
static HRESULT uia_get_provider_from_hwnd(struct uia_node *node)
{
LRESULT lr;
if (!uia_start_client_thread())
return E_FAIL;
SetLastError(NOERROR);
lr = SendMessageW(node->hwnd, WM_GETOBJECT, 0, UiaRootObjectId);
if (GetLastError() == ERROR_INVALID_WINDOW_HANDLE)
{
uia_stop_client_thread();
return UIA_E_ELEMENTNOTAVAILABLE;
}
if (!lr)
{
FIXME("No native UIA provider for hwnd %p, MSAA proxy currently unimplemented.\n", node->hwnd);
uia_stop_client_thread();
return E_NOTIMPL;
}
return create_wine_uia_nested_node_provider(node, lr);
return SendMessageW(client_thread.hwnd, WM_UIA_CLIENT_GET_NODE_PROV, (WPARAM)lr, (LPARAM)node);
}
/***********************************************************************