1 files changed, 102 insertions, 0 deletions
diff --git a/src/core/pointer_device_qt.cpp b/src/core/pointer_device_qt.cpp
new file mode 100644
index 000000000..a3d7f3d37
--- /dev/null
+++ b/src/core/pointer_device_qt.cpp
@@ -0,0 +1,102 @@
+// Copyright (C) 2022 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+// based on chromium/ui/base/pointer/pointer_device_linux.cc
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/base/pointer/pointer_device.h"
+
+#include <algorithm>
+#include <QPointingDevice>
+
+namespace ui {
+
+namespace {
+
+bool IsTouchScreen(const QInputDevice *device)
+{
+    return device->type() & QPointingDevice::DeviceType::TouchScreen;
+}
+
+bool IsMouseOrTouchpad(const QInputDevice *device)
+{
+    return device->type()
+            & (QPointingDevice::DeviceType::TouchPad | QPointingDevice::DeviceType::Mouse);
+}
+
+bool IsTouchDevicePresent()
+{
+    QList<const QInputDevice *> devices = QInputDevice::devices();
+    return std::any_of(devices.constBegin(), devices.constEnd(), IsTouchScreen);
+}
+
+bool IsMouseOrTouchpadPresent()
+{
+    QList<const QInputDevice *> devices = QInputDevice::devices();
+    return std::any_of(devices.constBegin(), devices.constEnd(), IsMouseOrTouchpad);
+}
+
+} // namespace
+
+int GetAvailablePointerTypes()
+{
+    int available_pointer_types = POINTER_TYPE_NONE;
+    if (IsMouseOrTouchpadPresent())
+        available_pointer_types |= POINTER_TYPE_FINE;
+
+    if (IsTouchDevicePresent())
+        available_pointer_types |= POINTER_TYPE_COARSE;
+
+    return available_pointer_types;
+}
+
+int GetAvailableHoverTypes()
+{
+    if (IsMouseOrTouchpadPresent())
+        return HOVER_TYPE_HOVER;
+
+    return HOVER_TYPE_NONE;
+}
+
+TouchScreensAvailability GetTouchScreensAvailability()
+{
+    if (!IsTouchDevicePresent())
+        return TouchScreensAvailability::NONE;
+
+    return TouchScreensAvailability::ENABLED;
+}
+
+int MaxTouchPoints()
+{
+    int max_touch = 0;
+    for (const auto *device : QInputDevice::devices()) {
+        if (IsTouchScreen(device)) {
+            int points = static_cast<const QPointingDevice *>(device)->maximumPoints();
+            max_touch = points > max_touch ? points : max_touch;
+        }
+    }
+
+    return max_touch;
+}
+
+PointerType GetPrimaryPointerType(int available_pointer_types)
+{
+    if (available_pointer_types & POINTER_TYPE_FINE)
+        return POINTER_TYPE_FINE;
+    if (available_pointer_types & POINTER_TYPE_COARSE)
+        return POINTER_TYPE_COARSE;
+    Q_ASSERT(available_pointer_types == POINTER_TYPE_NONE);
+    return POINTER_TYPE_NONE;
+}
+
+HoverType GetPrimaryHoverType(int available_hover_types)
+{
+    if (available_hover_types & HOVER_TYPE_HOVER)
+        return HOVER_TYPE_HOVER;
+    Q_ASSERT(available_hover_types == HOVER_TYPE_NONE);
+    return HOVER_TYPE_NONE;
+}
+
+} // namespace ui