1 files changed, 250 insertions, 0 deletions
diff --git a/src/plugins/generic/evdevkeyboard/qevdevkeyboardmanager.cpp b/src/plugins/generic/evdevkeyboard/qevdevkeyboardmanager.cpp
new file mode 100644
index 0000000000..8769b70495
--- /dev/null
+++ b/src/plugins/generic/evdevkeyboard/qevdevkeyboardmanager.cpp
@@ -0,0 +1,250 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qevdevkeyboardmanager.h"
+
+#include <QStringList>
+#include <QDebug>
+#include <QCoreApplication>
+
+#include <linux/input.h>
+#include <linux/kd.h>
+
+//#define QT_QPA_KEYMAP_DEBUG
+
+QT_BEGIN_NAMESPACE
+
+QEvdevKeyboardManager::QEvdevKeyboardManager(const QString &key, const QString &specification)
+    : m_udev(0), m_udevMonitor(0), m_udevMonitorFileDescriptor(-1), m_udevSocketNotifier(0)
+{
+    Q_UNUSED(key);
+
+    bool useUDev = false;
+    QStringList args = specification.split(QLatin1Char(':'));
+    QStringList devices;
+
+    foreach (const QString &arg, args) {
+        if (arg.startsWith("udev") && !arg.contains("no")) {
+            useUDev = true;
+        } else if (arg.startsWith("/dev/")) {
+            // if device is specified try to use it
+            devices.append(arg);
+            args.removeAll(arg);
+        }
+    }
+
+    m_spec = args.join(":");
+
+    // add all keyboards for devices specified in the argument list
+    foreach (const QString &device, devices)
+        addKeyboard(device);
+
+    // no udev and no devices specified, try a fallback
+    if (!useUDev && devices.isEmpty()) {
+        addKeyboard();
+        return;
+    }
+
+    m_udev = udev_new();
+    if (!m_udev) {
+        qWarning() << "Failed to read udev configuration. Try to open a keyboard without it";
+        addKeyboard();
+    } else {
+        // Look for already attached devices:
+        parseConnectedDevices();
+        // Watch for device add/remove
+        startWatching();
+    }
+}
+
+QEvdevKeyboardManager::~QEvdevKeyboardManager()
+{
+    // cleanup udev related resources
+    stopWatching();
+    if (m_udev)
+        udev_unref(m_udev);
+
+    // cleanup all resources of connected keyboards
+    qDeleteAll(m_keyboards);
+    m_keyboards.clear();
+}
+
+void QEvdevKeyboardManager::addKeyboard(const QString &devnode)
+{
+    QString specification = m_spec;
+    QString deviceString = devnode;
+
+    if (!deviceString.isEmpty()) {
+        specification.append(":");
+        specification.append(deviceString);
+    } else {
+        deviceString = "default";
+    }
+
+#ifdef QT_QPA_KEYMAP_DEBUG
+    qWarning() << "Adding keyboard at" << deviceString;
+#endif
+
+    QEvdevKeyboardHandler *keyboard;
+    keyboard = QEvdevKeyboardHandler::createLinuxInputKeyboardHandler("EvdevKeyboard", specification);
+    if (keyboard)
+        m_keyboards.insert(deviceString, keyboard);
+    else
+        qWarning() << "Failed to open keyboard";
+}
+
+void QEvdevKeyboardManager::removeKeyboard(const QString &devnode)
+{
+    if (m_keyboards.contains(devnode)) {
+#ifdef QT_QPA_KEYMAP_DEBUG
+    qWarning() << "Removing keyboard at" << devnode;
+#endif
+        QEvdevKeyboardHandler *keyboard = m_keyboards.value(devnode);
+        m_keyboards.remove(devnode);
+        delete keyboard;
+    }
+}
+
+void QEvdevKeyboardManager::startWatching()
+{
+    m_udevMonitor = udev_monitor_new_from_netlink(m_udev, "udev");
+    if (!m_udevMonitor) {
+#ifdef QT_QPA_KEYMAP_DEBUG
+        qWarning("Unable to create an Udev monitor. No devices can be detected.");
+#endif
+        return;
+    }
+
+    udev_monitor_filter_add_match_subsystem_devtype(m_udevMonitor, "input", NULL);
+    udev_monitor_enable_receiving(m_udevMonitor);
+    m_udevMonitorFileDescriptor = udev_monitor_get_fd(m_udevMonitor);
+
+    m_udevSocketNotifier = new QSocketNotifier(m_udevMonitorFileDescriptor, QSocketNotifier::Read, this);
+    connect(m_udevSocketNotifier, SIGNAL(activated(int)), this, SLOT(deviceDetected()));
+}
+
+void QEvdevKeyboardManager::stopWatching()
+{
+    if (m_udevSocketNotifier)
+        delete m_udevSocketNotifier;
+
+    if (m_udevMonitor)
+        udev_monitor_unref(m_udevMonitor);
+
+    m_udevSocketNotifier = 0;
+    m_udevMonitor = 0;
+    m_udevMonitorFileDescriptor = 0;
+}
+
+void QEvdevKeyboardManager::deviceDetected()
+{
+    if (!m_udevMonitor)
+        return;
+
+    struct udev_device *dev;
+    dev = udev_monitor_receive_device(m_udevMonitor);
+    if (!dev)
+        return;
+
+    if (qstrcmp(udev_device_get_action(dev), "add") == 0) {
+        checkDevice(dev);
+    } else {
+        // We can't determine what the device was, so we handle false positives outside of this class
+        QString str = udev_device_get_devnode(dev);
+        if (!str.isEmpty())
+            removeKeyboard(str);
+    }
+
+    udev_device_unref(dev);
+}
+
+void QEvdevKeyboardManager::parseConnectedDevices()
+{
+    struct udev_enumerate *enumerate;
+    struct udev_list_entry *devices;
+    struct udev_list_entry *dev_list_entry;
+    struct udev_device *dev;
+    const char *str;
+
+    enumerate = udev_enumerate_new(m_udev);
+    udev_enumerate_add_match_subsystem(enumerate, "input");
+    udev_enumerate_scan_devices(enumerate);
+    devices = udev_enumerate_get_list_entry(enumerate);
+
+    udev_list_entry_foreach(dev_list_entry, devices) {
+        str = udev_list_entry_get_name(dev_list_entry);
+        dev = udev_device_new_from_syspath(m_udev, str);
+        checkDevice(dev);
+    }
+
+    udev_enumerate_unref(enumerate);
+}
+
+void QEvdevKeyboardManager::checkDevice(udev_device *dev)
+{
+    const char *str;
+    QString devnode;
+
+    str = udev_device_get_devnode(dev);
+    if (!str)
+        return;
+
+    devnode = str;
+
+    dev = udev_device_get_parent_with_subsystem_devtype(dev, "input", NULL);
+    if (!dev)
+        return;
+
+    str = udev_device_get_sysattr_value(dev, "capabilities/key");
+    QStringList val = QString(str).split(' ', QString::SkipEmptyParts);
+
+    bool ok;
+    unsigned long long keys = val.last().toULongLong(&ok, 16);
+    if (!ok)
+        return;
+
+    // Tests if the letter Q is valid for the device.  We may want to alter this test, but it seems mostly reliable.
+    bool test = (keys >> KEY_Q) & 1;
+    if (test) {
+        addKeyboard(devnode);
+        return;
+    }
+}