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3 ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
4 ** Contact: http://www.qt-project.org/
6 ** This file is part of the QtQml module of the Qt Toolkit.
8 ** $QT_BEGIN_LICENSE:LGPL$
9 ** GNU Lesser General Public License Usage
10 ** This file may be used under the terms of the GNU Lesser General Public
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21 ** GNU General Public License Usage
22 ** Alternatively, this file may be used under the terms of the GNU General
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40 ****************************************************************************/
42 #include "qdebugmessageservice_p.h"
43 #include "qqmldebugservice_p_p.h"
45 #include <QDataStream>
50 Q_GLOBAL_STATIC(QDebugMessageService, qmlDebugMessageService)
52 void DebugMessageHandler(QtMsgType type, const QMessageLogContext &ctxt,
55 QDebugMessageService::instance()->sendDebugMessage(type, ctxt, buf);
58 class QDebugMessageServicePrivate : public QQmlDebugServicePrivate
61 QDebugMessageServicePrivate()
63 , prevState(QQmlDebugService::NotConnected)
67 QMessageHandler oldMsgHandler;
68 QQmlDebugService::State prevState;
72 QDebugMessageService::QDebugMessageService(QObject *parent) :
73 QQmlDebugService(*(new QDebugMessageServicePrivate()),
74 QStringLiteral("DebugMessages"), 2, parent)
76 Q_D(QDebugMessageService);
78 // don't execute stateChanged() in parallel
79 QMutexLocker lock(&d->initMutex);
81 if (state() == Enabled) {
82 d->oldMsgHandler = qInstallMessageHandler(DebugMessageHandler);
83 d->prevState = Enabled;
87 QDebugMessageService *QDebugMessageService::instance()
89 return qmlDebugMessageService();
92 void QDebugMessageService::sendDebugMessage(QtMsgType type,
93 const QMessageLogContext &ctxt,
96 Q_D(QDebugMessageService);
98 //We do not want to alter the message handling mechanism
99 //We just eavesdrop and forward the messages to a port
100 //only if a client is connected to it.
102 QDataStream ws(&message, QIODevice::WriteOnly);
103 ws << QByteArray("MESSAGE") << type << QString::fromLocal8Bit(buf).toUtf8();
104 ws << QString::fromLatin1(ctxt.file).toUtf8();
105 ws << ctxt.line << QString::fromLatin1(ctxt.function).toUtf8();
107 sendMessage(message);
108 if (d->oldMsgHandler)
109 (*d->oldMsgHandler)(type, ctxt, buf);
112 void QDebugMessageService::stateChanged(State state)
114 Q_D(QDebugMessageService);
115 QMutexLocker lock(&d->initMutex);
117 if (state != Enabled && d->prevState == Enabled) {
118 QMessageHandler handler = qInstallMessageHandler(d->oldMsgHandler);
119 // has our handler been overwritten in between?
120 if (handler != DebugMessageHandler)
121 qInstallMessageHandler(handler);
123 } else if (state == Enabled && d->prevState != Enabled) {
124 d->oldMsgHandler = qInstallMessageHandler(DebugMessageHandler);
127 d->prevState = state;