Add libinput support

Supports relative pointer, axis, keyboard and touch events.

libinput support is only available in combination with libudev.
libxkbcommon is required to perform key mapping. For now the
default keymap is used always (selected when building xkbcommon).

[ChangeLog][QtGui] Added a plugin to get mouse, keyboard and touch events
via libinput.

Change-Id: I469d8992c0cd3e79225cefaeb931697baf86a92b
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>

5 files changed, 95 insertions, 0 deletions

diff --git a/src/plugins/generic/generic.pro b/src/plugins/generic/generic.pro
index 4cdc7e7a76..82a4ad4ce8 100644
--- a/src/plugins/generic/generic.pro
+++ b/src/plugins/generic/generic.pro
@@ -9,3 +9,7 @@ contains(QT_CONFIG, tslib) {
 }
 
 SUBDIRS += tuiotouch
+
+contains(QT_CONFIG, libinput) {
+    SUBDIRS += libinput
+}
diff --git a/src/plugins/generic/libinput/README b/src/plugins/generic/libinput/README
new file mode 100644
index 0000000000..4312ccbf3a
--- /dev/null
+++ b/src/plugins/generic/libinput/README
@@ -0,0 +1,18 @@
+This is a generic plug-in for libinput 0.6.0
+(http://www.freedesktop.org/wiki/Software/libinput)
+
+Supports relative pointer, axis, keyboard and touch events. udev is
+required. xkbcommon is used to perform keyboard mapping. The dependency on
+xkbcommon is optional. However, no key events will be generated without it.
+
+The plugin is integrated with configure and is built automatically when the
+necessary dependencies are present.
+
+To use this plugin with eglfs, set QT_QPA_EGLFS_DISABLE_INPUT=1 before launching
+the application and pass -plugin libinput.
+
+To get info and debug messages from libinput, enable the logging category
+qt.qpa.input.
+
+For the time being xkbcommon's default keymap is used always. Support for
+changing it will be added in the future.
diff --git a/src/plugins/generic/libinput/libinput.json b/src/plugins/generic/libinput/libinput.json
new file mode 100644
index 0000000000..4a93f271f3
--- /dev/null
+++ b/src/plugins/generic/libinput/libinput.json
@@ -0,0 +1,3 @@
+{
+    "Keys": [ "libinput" ]
+}
diff --git a/src/plugins/generic/libinput/libinput.pro b/src/plugins/generic/libinput/libinput.pro
new file mode 100644
index 0000000000..17dbb23ef0
--- /dev/null
+++ b/src/plugins/generic/libinput/libinput.pro
@@ -0,0 +1,12 @@
+TARGET = qlibinputplugin
+
+PLUGIN_TYPE = generic
+PLUGIN_EXTENDS = -
+PLUGIN_CLASS_NAME = QLibInputPlugin
+load(qt_plugin)
+
+QT += core-private platformsupport-private gui-private
+
+SOURCES = main.cpp
+
+OTHER_FILES = libinput.json
diff --git a/src/plugins/generic/libinput/main.cpp b/src/plugins/generic/libinput/main.cpp
new file mode 100644
index 0000000000..16c391cc22
--- /dev/null
+++ b/src/plugins/generic/libinput/main.cpp
@@ -0,0 +1,58 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL21$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia. For licensing terms and
+** conditions see http://qt.digia.com/licensing. For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file. Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights. These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui/qgenericplugin.h>
+#include <QtPlatformSupport/private/qlibinputhandler_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class QLibInputPlugin : public QGenericPlugin
+{
+    Q_OBJECT
+    Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QGenericPluginFactoryInterface" FILE "libinput.json")
+
+public:
+    QObject *create(const QString &key, const QString &specification);
+};
+
+QObject *QLibInputPlugin::create(const QString &key, const QString &specification)
+{
+    if (!key.compare(QLatin1String("libinput"), Qt::CaseInsensitive))
+        return new QLibInputHandler(key, specification);
+
+    return 0;
+}
+
+QT_END_NAMESPACE
+
+#include "main.moc"