Add Linux Accessibility Bridge

This is a plugin that bridges the QAccessible world
to AT-SPI 2 on Linux.

Change-Id: I7af22621ee6a3cefc723b137b7f227a611cf6641
Reviewed-by: Jan-Arve Sæther <jan-arve.saether@nokia.com>

1 files changed, 116 insertions, 0 deletions

diff --git a/src/platformsupport/linuxaccessibility/dbusconnection.cpp b/src/platformsupport/linuxaccessibility/dbusconnection.cpp
new file mode 100644
index 0000000000..4d9f315952
--- /dev/null
+++ b/src/platformsupport/linuxaccessibility/dbusconnection.cpp
@@ -0,0 +1,116 @@
+/****************************************************************************
+**
+** 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 "dbusconnection_p.h"
+
+#include <QtDBus/QDBusMessage>
+#include <qdebug.h>
+
+/*!
+    \class DBusConnection
+
+    \brief DBusConnection
+
+    DBusConnection
+*/
+
+QT_BEGIN_NAMESPACE
+
+/*!
+  Connects to the accessibility dbus.
+
+  This is usually a different bus from the session bus.
+*/
+DBusConnection::DBusConnection()
+    : dbusConnection(connectDBus())
+{}
+
+QDBusConnection DBusConnection::connectDBus()
+{
+    QString address = getAccessibilityBusAddress();
+
+    if (!address.isEmpty()) {
+        QDBusConnection c = QDBusConnection::connectToBus(address, QStringLiteral("a11y"));
+        if (c.isConnected()) {
+            qDebug() << "Connected to accessibility bus at: " << address;
+            return c;
+        }
+        qWarning("Found Accessibility DBus address but cannot connect. Falling back to session bus.");
+    } else {
+        qWarning("Accessibility DBus not found. Falling back to session bus.");
+    }
+
+    QDBusConnection c = QDBusConnection::sessionBus();
+    if (!c.isConnected()) {
+        qWarning("Could not connect to DBus.");
+    }
+    return QDBusConnection::sessionBus();
+}
+
+QString DBusConnection::getAccessibilityBusAddress() const
+{
+    QDBusConnection c = QDBusConnection::sessionBus();
+
+    QDBusMessage m = QDBusMessage::createMethodCall(QLatin1String("org.a11y.Bus"),
+                                                    QLatin1String("/org/a11y/bus"),
+                                                    QLatin1String("org.a11y.Bus"), QLatin1String("GetAddress"));
+    QDBusMessage reply = c.call(m);
+    if (reply.type() == QDBusMessage::ErrorMessage) {
+        qWarning() << "Qt at-spi: error getting the accessibility dbus address: " << reply.errorMessage();
+        return QString();
+    }
+
+    QString busAddress = reply.arguments().at(0).toString();
+    qDebug() << "Got bus address: " << busAddress;
+    return busAddress;
+}
+
+/*!
+  Returns the DBus connection that got established.
+*/
+QDBusConnection DBusConnection::connection() const
+{
+    return dbusConnection;
+}
+
+QT_END_NAMESPACE