From: Connor McAdams cmcadams@codeweavers.com
Signed-off-by: Connor McAdams cmcadams@codeweavers.com --- dlls/uiautomationcore/uia_client.c | 182 ++++++++++++++++++++++++++++- 1 file changed, 178 insertions(+), 4 deletions(-)
diff --git a/dlls/uiautomationcore/uia_client.c b/dlls/uiautomationcore/uia_client.c index 193bad60230..3de18174b39 100644 --- a/dlls/uiautomationcore/uia_client.c +++ b/dlls/uiautomationcore/uia_client.c @@ -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 +776,163 @@ 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; +}; + +struct uia_get_node_prov_args { + struct uia_node *node; + LRESULT lr; +}; + +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: + { + struct uia_get_node_prov_args *args = (struct uia_get_node_prov_args *)lparam; + + return create_wine_uia_nested_node_provider(args->node, args->lr); + } + + 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 (!IsWindow(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 +942,10 @@ 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) @@ -809,20 +973,30 @@ 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; + struct uia_get_node_prov_args args; + + if (!uia_start_client_thread()) + return E_FAIL;
- lr = SendMessageW(node->hwnd, WM_GETOBJECT, 0, UiaRootObjectId); - if (!lr) + args.node = node; + args.lr = SendMessageW(node->hwnd, WM_GETOBJECT, 0, UiaRootObjectId); + if (!args.lr) { if (!IsWindow(node->hwnd) && GetLastError() == ERROR_INVALID_WINDOW_HANDLE) return UIA_E_ELEMENTNOTAVAILABLE; 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, 0, (LPARAM)&args); }
/***********************************************************************