fix: detect screen readers by testing their existences (#39988)

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Cheng Zhao 2023-09-29 00:17:42 +09:00 committed by GitHub
parent 94585f5889
commit 4cf6884dd4
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@ -7,6 +7,7 @@
#include <wrl/client.h>
#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