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3 ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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6 ** This file is part of the QtQml module of the Qt Toolkit.
8 ** $QT_BEGIN_LICENSE:LGPL$
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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
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40 ****************************************************************************/
42 #include "qdebugmessageservice_p.h"
43 #include "qqmldebugservice_p_p.h"
45 #include <QDataStream>
49 Q_GLOBAL_STATIC(QDebugMessageService, qmlDebugMessageService)
51 void DebugMessageHandler(QtMsgType type, const QMessageLogContext &ctxt,
54 QDebugMessageService::instance()->sendDebugMessage(type, ctxt, buf);
57 class QDebugMessageServicePrivate : public QQmlDebugServicePrivate
60 QDebugMessageServicePrivate()
62 , prevState(QQmlDebugService::NotConnected)
66 QMessageHandler oldMsgHandler;
67 QQmlDebugService::State prevState;
70 QDebugMessageService::QDebugMessageService(QObject *parent) :
71 QQmlDebugService(*(new QDebugMessageServicePrivate()),
72 QLatin1String("DebugMessages"), 2, parent)
74 Q_D(QDebugMessageService);
77 if (state() == Enabled) {
78 d->oldMsgHandler = qInstallMessageHandler(DebugMessageHandler);
79 d->prevState = Enabled;
83 QDebugMessageService *QDebugMessageService::instance()
85 return qmlDebugMessageService();
88 void QDebugMessageService::sendDebugMessage(QtMsgType type,
89 const QMessageLogContext &ctxt,
92 Q_D(QDebugMessageService);
94 //We do not want to alter the message handling mechanism
95 //We just eavesdrop and forward the messages to a port
96 //only if a client is connected to it.
98 QDataStream ws(&message, QIODevice::WriteOnly);
99 ws << QByteArray("MESSAGE") << type << QString::fromLocal8Bit(buf).toUtf8();
100 ws << QString::fromLatin1(ctxt.file).toUtf8();
101 ws << ctxt.line << QString::fromLatin1(ctxt.function).toUtf8();
103 sendMessage(message);
104 if (d->oldMsgHandler)
105 (*d->oldMsgHandler)(type, ctxt, buf);
108 void QDebugMessageService::stateChanged(State state)
110 Q_D(QDebugMessageService);
112 if (state != Enabled && d->prevState == Enabled) {
113 QMessageHandler handler = qInstallMessageHandler(d->oldMsgHandler);
114 // has our handler been overwritten in between?
115 if (handler != DebugMessageHandler)
116 qInstallMessageHandler(handler);
118 } else if (state == Enabled && d->prevState != Enabled) {
119 d->oldMsgHandler = qInstallMessageHandler(DebugMessageHandler);
123 d->prevState = state;