summaryrefslogtreecommitdiffstats
path: root/widget/windows/InputDeviceUtils.cpp
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--widget/windows/InputDeviceUtils.cpp61
1 files changed, 61 insertions, 0 deletions
diff --git a/widget/windows/InputDeviceUtils.cpp b/widget/windows/InputDeviceUtils.cpp
new file mode 100644
index 0000000000..3636b93d6a
--- /dev/null
+++ b/widget/windows/InputDeviceUtils.cpp
@@ -0,0 +1,61 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sts=2 sw=2 et cin: */
+/* 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/. */
+
+#include "InputDeviceUtils.h"
+
+#define INITGUID
+#include <dbt.h>
+#include <hidclass.h>
+#include <ntddmou.h>
+#include <setupapi.h>
+
+namespace mozilla {
+namespace widget {
+
+HDEVNOTIFY
+InputDeviceUtils::RegisterNotification(HWND aHwnd) {
+ DEV_BROADCAST_DEVICEINTERFACE filter = {};
+
+ filter.dbcc_size = sizeof(DEV_BROADCAST_DEVICEINTERFACE);
+ filter.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
+ // Some touchsreen devices are not GUID_DEVINTERFACE_MOUSE, so here we use
+ // GUID_DEVINTERFACE_HID instead.
+ filter.dbcc_classguid = GUID_DEVINTERFACE_HID;
+ return RegisterDeviceNotification(aHwnd, &filter,
+ DEVICE_NOTIFY_WINDOW_HANDLE);
+}
+
+void InputDeviceUtils::UnregisterNotification(HDEVNOTIFY aHandle) {
+ if (!aHandle) {
+ return;
+ }
+ UnregisterDeviceNotification(aHandle);
+}
+
+DWORD
+InputDeviceUtils::CountMouseDevices() {
+ HDEVINFO hdev =
+ SetupDiGetClassDevs(&GUID_DEVINTERFACE_MOUSE, nullptr, nullptr,
+ DIGCF_DEVICEINTERFACE | DIGCF_PRESENT);
+ if (hdev == INVALID_HANDLE_VALUE) {
+ return 0;
+ }
+
+ DWORD count = 0;
+ SP_INTERFACE_DEVICE_DATA info = {};
+ info.cbSize = sizeof(SP_INTERFACE_DEVICE_DATA);
+ while (SetupDiEnumDeviceInterfaces(hdev, nullptr, &GUID_DEVINTERFACE_MOUSE,
+ count, &info)) {
+ if (info.Flags & SPINT_ACTIVE) {
+ count++;
+ }
+ }
+ SetupDiDestroyDeviceInfoList(hdev);
+ return count;
+}
+
+} // namespace widget
+} // namespace mozilla