Keymap support for QWS.

This patch adds support for keymaps to the QWSKeyboardHandler. The keymaps
can be generated by the kmap2qmap tool (see tools/ directory). The source
keymaps can be standard Linux .kmap files.

Changes to Qt:
 * completely refactored the Tty and Usb (now known as LinuxInput) handlers
 * removed the LinuxIS plugin (handled by LinuxInput now)
 * removed support for iPAQ, EBX and Zylonite keypads (obsolete hardware)
 * removed support for RAW tty mode. This could be re-added, for non-Linux
   systems by implementing a PC/AT scan-code to Linux keycode converter.

New features for Tty and LinuxInput (ex Usb) handlers:
 * support for keymaps
   QWS_KEYBOARD=..:keymap=/path/to/x.qmap:..
 * support for dead keys and the compose key
 * support for lock LEDs
 * support for key repeat rates (in ms):
   QWS_KEYBOARD=..:repeat-delay=x:repear-rate=y:..
 * the default keymap supports latin1 composing via AltGr:
   QWS_KEYBOARD=..:enable-compose:..
 * ctrl+alt+backspace application zapping can be disabled:
   QWS_KEYBOARD=..:disable-zap:..
 * added virtual filter functions to both the Tty and the LinuxInput
   handlers. (QWSKeyboardHandler::processKeycode should be virtual in the
   first place, but that would be BIC)

Still missing:
 * extended documentation for QWS_KEYBOARD

Reviewed-By: Paul Olav Tvete
Reviewed-By: Harald Fernengel

1 files changed, 241 insertions, 0 deletions

diff --git a/src/gui/embedded/qkbdlinuxinput_qws.cpp b/src/gui/embedded/qkbdlinuxinput_qws.cpp
new file mode 100644
index 0000000..d04b09f
--- /dev/null
+++ b/src/gui/embedded/qkbdlinuxinput_qws.cpp
@@ -0,0 +1,241 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, 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 1.0, 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qkbdlinuxinput_qws.h"
+
+#ifndef QT_NO_QWS_KEYBOARD
+
+#include <QSocketNotifier>
+#include <QStringList>
+
+#include <qplatformdefs.h>
+
+#include <errno.h>
+#include <termios.h>
+
+#include <linux/kd.h>
+#include <linux/input.h>
+
+QT_BEGIN_NAMESPACE
+
+
+class QWSLinuxInputKbPrivate : public QObject
+{
+    Q_OBJECT
+public:
+    QWSLinuxInputKbPrivate(QWSLinuxInputKeyboardHandler *, const QString &);
+    ~QWSLinuxInputKbPrivate();
+
+private:
+    void switchLed(int, bool);
+
+private Q_SLOTS:
+    void readKeycode();
+
+private:
+    QWSLinuxInputKeyboardHandler *m_handler;
+    int                           m_fd;
+    int                           m_tty_fd;
+    struct termios                m_tty_attr;
+};
+
+QWSLinuxInputKeyboardHandler::QWSLinuxInputKeyboardHandler(const QString &device)
+    : QWSKeyboardHandler(device)
+{
+    d = new QWSLinuxInputKbPrivate(this, device);
+}
+
+QWSLinuxInputKeyboardHandler::~QWSLinuxInputKeyboardHandler()
+{
+    delete d;
+}
+
+bool QWSLinuxInputKeyboardHandler::filterInputEvent(quint16 &, qint32 &)
+{
+    return false;
+}
+
+QWSLinuxInputKbPrivate::QWSLinuxInputKbPrivate(QWSLinuxInputKeyboardHandler *h, const QString &device)
+    : m_handler(h), m_fd(-1), m_tty_fd(-1)
+
+{
+    setObjectName(QLatin1String("LinuxInputSubsystem Keyboard Handler"));
+
+    QString dev = QLatin1String("/dev/input/event1");
+    int repeat_delay = -1;
+    int repeat_rate = -1;
+
+    QStringList args = device.split(QLatin1Char(':'));
+    foreach (const QString &arg, args) {
+        if (arg.startsWith(QLatin1String("repeat_delay=")))
+            repeat_delay = arg.mid(13).toInt();
+        else if (arg.startsWith(QLatin1String("repeat_rate=")))
+            repeat_rate = arg.mid(12).toInt();
+        else if (arg.startsWith(QLatin1String("/dev/")))
+            dev = arg;
+    }
+
+    m_fd = QT_OPEN(dev.toLocal8Bit().constData(), O_RDWR, 0);
+    if (m_fd >= 0) {
+        if (repeat_delay > 0 && repeat_rate > 0) {
+            int kbdrep[2] = { repeat_delay, repeat_rate };
+            ::ioctl(m_fd, EVIOCSREP, kbdrep);
+        }
+
+        QSocketNotifier *notifier;
+        notifier = new QSocketNotifier(m_fd, QSocketNotifier::Read, this);
+        connect(notifier, SIGNAL(activated(int)), this, SLOT(readKeycode()));
+
+        // play nice in case we are started from a shell (e.g. for debugging)
+        m_tty_fd = isatty(0) ? 0 : -1;
+
+        if (m_tty_fd >= 0) {
+            // save tty config for restore.
+            tcgetattr(m_tty_fd, &m_tty_attr);
+
+            struct ::termios termdata;
+            tcgetattr(m_tty_fd, &termdata);
+
+            // setting this tranlation mode is also needed in INPUT mode to prevent
+            // the shell from also interpreting codes, if the process has a tty
+            // attached: e.g. Ctrl+C wouldn't copy, but kill the application.
+            ::ioctl(m_tty_fd, KDSKBMODE, K_MEDIUMRAW);
+
+            // set the tty layer to pass-through
+            termdata.c_iflag = (IGNPAR | IGNBRK) & (~PARMRK) & (~ISTRIP);
+            termdata.c_oflag = 0;
+            termdata.c_cflag = CREAD | CS8;
+            termdata.c_lflag = 0;
+            termdata.c_cc[VTIME]=0;
+            termdata.c_cc[VMIN]=1;
+            cfsetispeed(&termdata, 9600);
+            cfsetospeed(&termdata, 9600);
+            tcsetattr(m_tty_fd, TCSANOW, &termdata);
+        }
+    } else {
+        qWarning("Cannot open input device '%s': %s", qPrintable(dev), strerror(errno));
+        return;
+    }
+}
+
+QWSLinuxInputKbPrivate::~QWSLinuxInputKbPrivate()
+{
+    if (m_tty_fd >= 0) {
+        ::ioctl(m_tty_fd, KDSKBMODE, K_XLATE);
+        tcsetattr(m_tty_fd, TCSANOW, &m_tty_attr);
+    }
+    if (m_fd >= 0)
+        QT_CLOSE(m_fd);
+}
+
+void QWSLinuxInputKbPrivate::switchLed(int led, bool state)
+{
+    struct ::input_event led_ie;
+    ::gettimeofday(&led_ie.time, 0);
+    led_ie.type = EV_LED;
+    led_ie.code = led;
+    led_ie.value = state;
+
+    QT_WRITE(m_fd, &led_ie, sizeof(led_ie));
+}
+
+void QWSLinuxInputKbPrivate::readKeycode()
+{
+    struct ::input_event buffer[32];
+    int n = 0;
+
+    forever {
+        n = QT_READ(m_fd, reinterpret_cast<char *>(buffer) + n, sizeof(buffer) - n);
+
+        if (n == 0) {
+            qWarning("Got EOF from the input device.");
+            return;
+        } else if (n < 0 && (errno != EINTR && errno != EAGAIN)) {
+            qWarning("Could not read from input device: %s", strerror(errno));
+            return;
+        } else if (n % sizeof(buffer[0]) == 0) {
+            break;
+        }
+    }
+
+    n /= sizeof(buffer[0]);
+
+    for (int i = 0; i < n; ++i) {
+        if (buffer[i].type != EV_KEY)
+            continue;
+
+        quint16 code = buffer[i].code;
+        qint32 value = buffer[i].value;
+
+        if (m_handler->filterInputEvent(code, value))
+            continue;
+
+        QWSKeyboardHandler::KeycodeAction ka;
+        ka = m_handler->processKeycode(code, value != 0, value == 2);
+
+        switch (ka) {
+        case QWSKeyboardHandler::CapsLockOn:
+        case QWSKeyboardHandler::CapsLockOff:
+            switchLed(LED_CAPSL, ka == QWSKeyboardHandler::CapsLockOn);
+            break;
+
+        case QWSKeyboardHandler::NumLockOn:
+        case QWSKeyboardHandler::NumLockOff:
+            switchLed(LED_NUML, ka == QWSKeyboardHandler::NumLockOn);
+            break;
+
+        case QWSKeyboardHandler::ScrollLockOn:
+        case QWSKeyboardHandler::ScrollLockOff:
+            switchLed(LED_SCROLLL, ka == QWSKeyboardHandler::ScrollLockOn);
+            break;
+
+        default:
+            // ignore console switching and reboot
+            break;
+        }
+    }
+}
+
+QT_END_NAMESPACE
+
+#include "qkbdlinuxinput_qws.moc"
+
+#endif // QT_NO_QWS_KEYBOARD