| 1 | // Copyright (C) 2016 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
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| 3 | |
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| 4 | #include "qdebugmessageservice.h" |
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| 5 | |
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| 6 | #include <private/qqmldebugconnector_p.h> |
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| 7 | #include <private/qversionedpacket_p.h> |
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| 8 | |
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| 9 | QT_BEGIN_NAMESPACE |
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| 10 | |
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| 11 | using QQmlDebugPacket = QVersionedPacket<QQmlDebugConnector>; |
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| 12 | |
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| 13 | void DebugMessageHandler(QtMsgType type, const QMessageLogContext &ctxt, |
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| 14 | const QString &buf) |
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| 15 | { |
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| 16 | if (QDebugMessageServiceImpl *service = QQmlDebugConnector::service<QDebugMessageServiceImpl>()) |
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| 17 | service->sendDebugMessage(type, ctxt, buf); |
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| 18 | } |
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| 19 | |
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| 20 | QDebugMessageServiceImpl::QDebugMessageServiceImpl(QObject *parent) : |
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| 21 | QDebugMessageService(2, parent), oldMsgHandler(nullptr), |
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| 22 | prevState(QQmlDebugService::NotConnected) |
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| 23 | { |
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| 24 | // don't execute stateChanged() in parallel |
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| 25 | QMutexLocker lock(&initMutex); |
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| 26 | timer.start(); |
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| 27 | if (state() == Enabled) { |
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| 28 | oldMsgHandler = qInstallMessageHandler(DebugMessageHandler); |
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| 29 | prevState = Enabled; |
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| 30 | } |
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| 31 | } |
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| 32 | |
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| 33 | QDebugMessageServiceImpl::~QDebugMessageServiceImpl() |
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| 34 | { |
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| 35 | if (oldMsgHandler) |
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| 36 | restoreOldMessageHandler(); |
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| 37 | } |
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| 38 | |
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| 39 | void QDebugMessageServiceImpl::sendDebugMessage(QtMsgType type, |
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| 40 | const QMessageLogContext &ctxt, |
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| 41 | const QString &buf) |
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| 42 | { |
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| 43 | //We do not want to alter the message handling mechanism |
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| 44 | //We just eavesdrop and forward the messages to a port |
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| 45 | //only if a client is connected to it. |
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| 46 | QQmlDebugPacket ws; |
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| 47 | ws << QByteArray("MESSAGE" ) << int(type) << buf.toUtf8(); |
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| 48 | ws << QByteArray(ctxt.file) << ctxt.line << QByteArray(ctxt.function); |
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| 49 | ws << QByteArray(ctxt.category) << timer.nsecsElapsed(); |
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| 50 | |
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| 51 | emit messageToClient(name: name(), message: ws.data()); |
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| 52 | if (oldMsgHandler) |
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| 53 | (*oldMsgHandler)(type, ctxt, buf); |
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| 54 | } |
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| 55 | |
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| 56 | void QDebugMessageServiceImpl::stateChanged(State state) |
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| 57 | { |
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| 58 | QMutexLocker lock(&initMutex); |
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| 59 | |
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| 60 | if (state != Enabled && prevState == Enabled) |
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| 61 | restoreOldMessageHandler(); |
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| 62 | else if (state == Enabled && prevState != Enabled) |
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| 63 | oldMsgHandler = qInstallMessageHandler(DebugMessageHandler); |
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| 64 | |
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| 65 | prevState = state; |
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| 66 | } |
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| 67 | |
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| 68 | void QDebugMessageServiceImpl::restoreOldMessageHandler() |
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| 69 | { |
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| 70 | QtMessageHandler handler = qInstallMessageHandler(oldMsgHandler); |
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| 71 | |
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| 72 | // has our handler been overwritten in between? |
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| 73 | // In that case, leave the other one alone and try again on destruction. |
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| 74 | if (handler == DebugMessageHandler) |
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| 75 | oldMsgHandler = nullptr; |
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| 76 | else |
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| 77 | qInstallMessageHandler(handler); |
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| 78 | } |
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| 79 | |
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| 80 | void QDebugMessageServiceImpl::synchronizeTime(const QElapsedTimer &otherTimer) |
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| 81 | { |
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| 82 | QMutexLocker lock(&initMutex); |
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| 83 | timer = otherTimer; |
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| 84 | } |
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| 85 | |
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| 86 | QT_END_NAMESPACE |
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| 87 | |
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| 88 | #include "moc_qdebugmessageservice.cpp" |
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| 89 | |
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