qqmlinfo.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qqmlinfo.h"
 
#include "qqmldata_p.h"
#include "qqmlmetatype_p.h"
#include "qqmlengine_p.h"
#include "qqmlsourcecoordinate_p.h"
 
#include <QCoreApplication>
 
QT_BEGIN_NAMESPACE
 
 
 
class QQmlInfoPrivate
{
public:
    QQmlInfoPrivate(QtMsgType type)
        : ref (1)
        , msgType(type)
        , object(nullptr)
    {}
 
    int ref;
    QtMsgType msgType;
    const QObject *object;
    QString buffer;
    QList<QQmlError> errors;
};
 
QQmlInfo::QQmlInfo(QQmlInfoPrivate *p)
: QDebug(&p->buffer), d(p)
{
    nospace();
}
 
QQmlInfo::QQmlInfo(const QQmlInfo &other)
: QDebug(other), d(other.d)
{
    d->ref++;
}
 
QQmlInfo::~QQmlInfo()
{
    if (0 == --d->ref) {
        QList<QQmlError> errors = d->errors;
 
        QQmlEngine *engine = nullptr;
 
        if (!d->buffer.isEmpty()) {
            QQmlError error;
            error.setMessageType(d->msgType);
 
            QObject *object = const_cast<QObject *>(d->object);
 
            if (object) {
                // Some objects (e.g. like attached objects created in C++) won't have an associated engine,
                // but we can still try to look for a parent object that does.
                QObject *objectWithEngine = object;
                while (objectWithEngine) {
                    engine = qmlEngine(objectWithEngine);
                    if (engine)
                        break;
                    objectWithEngine = objectWithEngine->parent();
                }
 
                if (!objectWithEngine || objectWithEngine == object) {
                    d->buffer.prepend(QLatin1String("QML ") + QQmlMetaType::prettyTypeName(object) + QLatin1String(": "));
                } else {
                    d->buffer.prepend(QLatin1String("QML ") + QQmlMetaType::prettyTypeName(objectWithEngine)
                        + QLatin1String(" (parent or ancestor of ") + QQmlMetaType::prettyTypeName(object) + QLatin1String("): "));
                }
 
                QQmlData *ddata = QQmlData::get(objectWithEngine ? objectWithEngine : object, false);
                if (ddata && ddata->outerContext) {
                    error.setUrl(ddata->outerContext->url());
                    error.setLine(qmlConvertSourceCoordinate<quint16, int>(ddata->lineNumber));
                    error.setColumn(qmlConvertSourceCoordinate<quint16, int>(ddata->columnNumber));
                }
            }
 
            error.setDescription(d->buffer);
 
            errors.prepend(error);
        }
 
        QQmlEnginePrivate::warning(engine, errors);
 
        delete d;
    }
}
 
#define MESSAGE_FUNCS(FuncName, MessageLevel) \
    QQmlInfo FuncName(const QObject *me) \
    { \
        QQmlInfoPrivate *d = new QQmlInfoPrivate(MessageLevel); \
        d->object = me; \
        return QQmlInfo(d); \
    } \
    QQmlInfo FuncName(const QObject *me, const QQmlError &error) \
    { \
        QQmlInfoPrivate *d = new QQmlInfoPrivate(MessageLevel); \
        d->object = me; \
        d->errors << error; \
        return QQmlInfo(d); \
    } \
    QQmlInfo FuncName(const QObject *me, const QList<QQmlError> &errors) \
    { \
        QQmlInfoPrivate *d = new QQmlInfoPrivate(MessageLevel); \
        d->object = me; \
        d->errors = errors; \
        return QQmlInfo(d); \
    }
 
MESSAGE_FUNCS(qmlDebug, QtMsgType::QtDebugMsg)
MESSAGE_FUNCS(qmlInfo, QtMsgType::QtInfoMsg)
MESSAGE_FUNCS(qmlWarning, QtMsgType::QtWarningMsg)
 
QT_END_NAMESPACE