Move linuxaccessibility to QtGui

Change some too-generic file names.

Task-number: QTBUG-83255
Change-Id: I4497ee2508bc323566f4061d4547707b7bda7a77
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

1 files changed, 172 insertions, 0 deletions

diff --git a/src/gui/accessible/linux/dbusconnection.cpp b/src/gui/accessible/linux/dbusconnection.cpp
new file mode 100644
index 0000000000..45ddc8e496
--- /dev/null
+++ b/src/gui/accessible/linux/dbusconnection.cpp
@@ -0,0 +1,172 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+
+#include "dbusconnection_p.h"
+
+#include <QtDBus/QDBusMessage>
+#include <QtDBus/QDBusServiceWatcher>
+#include <qdebug.h>
+
+#include <QDBusConnectionInterface>
+#include "bus_interface.h"
+
+#include <QtGui/qguiapplication.h>
+#include <qpa/qplatformnativeinterface.h>
+
+QT_BEGIN_NAMESPACE
+
+/* note: do not change these to QStringLiteral;
+   we are unloaded before QtDBus is done using the strings.
+ */
+#define A11Y_SERVICE QLatin1String("org.a11y.Bus")
+#define A11Y_PATH QLatin1String("/org/a11y/bus")
+
+/*!
+    \class DBusConnection
+    \internal
+    \brief Connects to the accessibility dbus.
+
+    This is usually a different bus from the session bus.
+*/
+DBusConnection::DBusConnection(QObject *parent)
+    : QObject(parent), m_a11yConnection(QString()), m_enabled(false)
+{
+    // Start monitoring if "org.a11y.Bus" is registered as DBus service.
+    QDBusConnection c = QDBusConnection::sessionBus();
+    if (!c.isConnected()) {
+        return;
+    }
+
+    dbusWatcher = new QDBusServiceWatcher(A11Y_SERVICE, c, QDBusServiceWatcher::WatchForRegistration, this);
+    connect(dbusWatcher, SIGNAL(serviceRegistered(QString)), this, SLOT(serviceRegistered()));
+
+    // If it is registered already, setup a11y right away
+    if (c.interface()->isServiceRegistered(A11Y_SERVICE))
+        serviceRegistered();
+
+    // In addition try if there is an xatom exposing the bus address, this allows applications run as root to work
+    QString address = getAddressFromXCB();
+    if (!address.isEmpty()) {
+        m_enabled = true;
+        connectA11yBus(address);
+    }
+}
+
+QString DBusConnection::getAddressFromXCB()
+{
+    QGuiApplication *app = qobject_cast<QGuiApplication *>(QCoreApplication::instance());
+    if (!app)
+        return QString();
+    QPlatformNativeInterface *platformNativeInterface = app->platformNativeInterface();
+    QByteArray *addressByteArray = reinterpret_cast<QByteArray*>(
+                platformNativeInterface->nativeResourceForIntegration(QByteArrayLiteral("AtspiBus")));
+    if (addressByteArray) {
+        QString address = QString::fromLatin1(*addressByteArray);
+        delete addressByteArray;
+        return address;
+    }
+    return QString();
+}
+
+// We have the a11y registry on the session bus.
+// Subscribe to updates about a11y enabled state.
+// Find out the bus address
+void DBusConnection::serviceRegistered()
+{
+    // listen to enabled changes
+    QDBusConnection c = QDBusConnection::sessionBus();
+    OrgA11yStatusInterface *a11yStatus = new OrgA11yStatusInterface(A11Y_SERVICE, A11Y_PATH, c, this);
+
+    //The variable was introduced because on some embedded platforms there are custom accessibility
+    //clients which don't set Status.ScreenReaderEnabled to true. The variable is also useful for
+    //debugging.
+    static const bool a11yAlwaysOn = qEnvironmentVariableIsSet("QT_LINUX_ACCESSIBILITY_ALWAYS_ON");
+
+    bool enabled = a11yAlwaysOn || a11yStatus->screenReaderEnabled() || a11yStatus->isEnabled();
+
+    if (enabled != m_enabled) {
+        m_enabled = enabled;
+        if (m_a11yConnection.isConnected()) {
+            emit enabledChanged(m_enabled);
+        } else {
+            QDBusConnection c = QDBusConnection::sessionBus();
+            QDBusMessage m = QDBusMessage::createMethodCall(QLatin1String("org.a11y.Bus"),
+                                                            QLatin1String("/org/a11y/bus"),
+                                                            QLatin1String("org.a11y.Bus"), QLatin1String("GetAddress"));
+            c.callWithCallback(m, this, SLOT(connectA11yBus(QString)), SLOT(dbusError(QDBusError)));
+        }
+    }
+
+    //    connect(a11yStatus, ); QtDbus doesn't support notifications for property changes yet
+}
+
+void DBusConnection::serviceUnregistered()
+{
+    emit enabledChanged(false);
+}
+
+void DBusConnection::connectA11yBus(const QString &address)
+{
+    if (address.isEmpty()) {
+        qWarning("Could not find Accessibility DBus address.");
+        return;
+    }
+    m_a11yConnection = QDBusConnection(QDBusConnection::connectToBus(address, QLatin1String("a11y")));
+
+    if (m_enabled)
+        emit enabledChanged(true);
+}
+
+void DBusConnection::dbusError(const QDBusError &error)
+{
+    qWarning() << "Accessibility encountered a DBus error:" << error;
+}
+
+/*!
+  Returns the DBus connection that got established.
+  Or an invalid connection if not yet connected.
+*/
+QDBusConnection DBusConnection::connection() const
+{
+    return m_a11yConnection;
+}
+
+QT_END_NAMESPACE