diff --git a/shell/browser/native_window_views_win.cc b/shell/browser/native_window_views_win.cc index f782dbbbad31..e5ea8d7a2a23 100644 --- a/shell/browser/native_window_views_win.cc +++ b/shell/browser/native_window_views_win.cc @@ -7,6 +7,7 @@ #include #include "base/win/atl.h" // Must be before UIAutomationCore.h +#include "base/win/scoped_handle.h" #include "content/public/browser/browser_accessibility_state.h" #include "shell/browser/browser.h" #include "shell/browser/native_window_views.h" @@ -165,10 +166,41 @@ gfx::ResizeEdge GetWindowResizeEdge(WPARAM param) { } } +bool IsMutexPresent(const wchar_t* name) { + base::win::ScopedHandle mutex_holder(::CreateMutex(nullptr, false, name)); + return ::GetLastError() == ERROR_ALREADY_EXISTS; +} + +bool IsLibraryLoaded(const wchar_t* name) { + HMODULE hmodule = nullptr; + ::GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, name, + &hmodule); + return hmodule != nullptr; +} + +// The official way to get screen reader status is to call: +// SystemParametersInfo(SPI_GETSCREENREADER) && UiaClientsAreListening() +// However it has false positives (for example when user is using touch screens) +// and will cause performance issues in some apps. bool IsScreenReaderActive() { - UINT screenReader = 0; - SystemParametersInfo(SPI_GETSCREENREADER, 0, &screenReader, 0); - return screenReader && UiaClientsAreListening(); + if (IsMutexPresent(L"NarratorRunning")) + return true; + + static const wchar_t* names[] = {// NVDA + L"nvdaHelperRemote.dll", + // JAWS + L"jhook.dll", + // Window-Eyes + L"gwhk64.dll", L"gwmhook.dll", + // ZoomText + L"AiSquared.Infuser.HookLib.dll"}; + + for (auto* name : names) { + if (IsLibraryLoaded(name)) + return true; + } + + return false; } } // namespace