KControl: add touchpad configuration module

Supports the Libinput and Synaptics drivers, includes documentation and inpupt-touchpad icon.

Signed-off-by: Mavridis Philippe <mavridisf@gmail.com>
(cherry picked from commit 8bd4c502f65ad364261913150ce59a74c993ca1c)

1 files changed, 201 insertions, 0 deletions

diff --git a/kcontrol/input/syndaemon.cpp b/kcontrol/input/syndaemon.cpp
new file mode 100644
index 000000000..53d8346ca
--- /dev/null
+++ b/kcontrol/input/syndaemon.cpp
@@ -0,0 +1,201 @@
+/*******************************************************************************
+ syndaemon - daemon for the Synaptics touchpad driver which disables touchpad
+             on keyboard input
+
+ Copyright © 2004 Nadeem Hasan <nhasan@kde.org>
+                  Stefan Kombrink <katakombi@web.de>
+             2024 Mavridis Philippe <mavridisf@gmail.com>
+
+ This program is free software: you can redistribute it and/or modify it under
+ the terms of the GNU General Public License as published by the Free Software
+ Foundation, either version 3 of the License, or (at your option) any later
+ version.
+
+ This program is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ this program. If not, see <https://www.gnu.org/licenses/>.
+
+*******************************************************************************/
+
+// TQt
+#include <tqdatetime.h>
+#include <tqtimer.h>
+
+// TDE
+#include <ksimpleconfig.h>
+#include <tdecmdlineargs.h>
+#include <kuniqueapplication.h>
+#include <tdeaboutdata.h>
+#include <tdelocale.h>
+#include <kdebug.h>
+
+// DCOP
+#include <dcopclient.h>
+
+// tdecm_touchpad
+#include "touchpad_settings.h"
+
+// SynDaemon
+#include "syndaemon.h"
+#include "syndaemon.moc"
+
+const unsigned int SynDaemon::TIME_OUT = 150;
+const unsigned int SynDaemon::POLL_INTERVAL = 100;
+const unsigned int SynDaemon::KEYMAP_SIZE = 32;
+
+unsigned char* SynDaemon::m_keyboard_mask;
+
+SynDaemon::SynDaemon() : DCOPObject("syndaemon"), TQObject()
+{
+    m_typing = false;
+    m_time = new TQTime();
+    d_settings = new TouchpadSettings;
+
+    m_keyboard_mask = new unsigned char[ KEYMAP_SIZE ];
+
+    // open a connection to the X server
+    m_display = XOpenDisplay(NULL);
+
+    if (!m_display) kdError() << "Can't open display!" << endl;
+
+    // setup keymap
+    XModifierKeymap *modifiers;
+
+    for (unsigned int i = 0; i < KEYMAP_SIZE; ++i)
+        m_keyboard_mask[i] = 0xFF;
+
+    modifiers = XGetModifierMapping(m_display);
+    for (int i = 0; i < 8 * modifiers->max_keypermod; ++i)
+    {
+        KeyCode kc = modifiers->modifiermap[i];
+        if (kc != 0) clearBit(m_keyboard_mask, kc);
+    }
+
+    XFreeModifiermap(modifiers);
+
+    m_poll = new TQTimer(this);
+    connect(m_poll, TQ_SIGNAL(timeout()), this, TQ_SLOT(poll()));
+    m_poll->start(POLL_INTERVAL);
+}
+
+SynDaemon::~SynDaemon()
+{
+    setTouchpadOn(true);
+    m_poll->stop();
+    delete m_keyboard_mask;
+}
+
+void SynDaemon::stop()
+{
+    kapp->quit();
+}
+
+void SynDaemon::poll()
+{
+    // do nothing if the user has explicitly disabled the touchpad in the settings
+    if (!touchpadEnabled()) return;
+
+    if (hasKeyboardActivity())
+    {
+        m_time->start();
+
+        if (!m_typing)
+        {
+            setTouchpadOn(false);
+        }
+    }
+
+    else
+    {
+        if (m_typing && (m_time->elapsed() > TIME_OUT))
+        {
+            setTouchpadOn(true);
+        }
+    }
+}
+
+bool SynDaemon::touchpadEnabled()
+{
+    // We can't read from our own TouchpadSettings
+    // as it contains the currently applied value
+    // so we revert to this
+    KSimpleConfig cfg("kcminputrc");
+    cfg.setGroup("Touchpad");
+    return cfg.readBoolEntry("Enabled", true);
+}
+
+void SynDaemon::setTouchpadOn(bool on)
+{
+    m_typing = !on;
+    if (!d_settings->setTouchpadEnabled(on))
+    {
+        kdWarning() << "unable to turn off touchpad!" << endl;
+    }
+}
+
+void SynDaemon::clearBit(unsigned char *ptr, int bit)
+{
+    int byteNum = bit / 8;
+    int bitNum = bit % 8;
+    ptr[byteNum] &= ~(1 << bitNum);
+}
+
+bool SynDaemon::hasKeyboardActivity()
+{
+    static unsigned char oldKeyState[KEYMAP_SIZE];
+    unsigned char keyState[KEYMAP_SIZE];
+
+    bool result = false;
+
+    XQueryKeymap(m_display, (char*)keyState);
+
+    // find pressed keys
+    for (unsigned int i = 0; i < KEYMAP_SIZE; ++i)
+    {
+        if ((keyState[i] & ~oldKeyState[i]) & m_keyboard_mask[i])
+        {
+            result = true;
+            break;
+        }
+    }
+
+    // ignore any modifiers
+    for (unsigned int i = 0; i < KEYMAP_SIZE; ++i)
+    {
+        if (keyState[i] & ~m_keyboard_mask[i])
+        {
+            result = false;
+            break;
+        }
+    }
+
+    // back up key states...
+    for (unsigned int i = 0; i < KEYMAP_SIZE; ++i)
+    {
+        oldKeyState[i] = keyState[i];
+    }
+
+    return result;
+}
+
+extern "C" TDE_EXPORT int main(int argc, char *argv[])
+{
+    TDEAboutData aboutData( "syndaemon", I18N_NOOP("Synaptics helper daemon"),
+        "0.1", I18N_NOOP("Synaptics helper daemon"), TDEAboutData::License_GPL_V2,
+        "© 2024 Mavridis Philippe" );
+
+    aboutData.addAuthor("Nadeem Hasan", I18N_NOOP("Author"), "nhasan@kde.org");
+    aboutData.addAuthor("Mavridis Philippe", I18N_NOOP("Author"), "mavridisf@gmail.com");
+
+    TDECmdLineArgs::init(argc, argv, &aboutData);
+
+    TDEApplication app;
+    app.disableSessionManagement();
+    app.dcopClient()->registerAs("syndaemon", false);
+
+    SynDaemon syndaemon;
+    return app.exec();
+}
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