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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "logwidget.h"
#include <QApplication>
#include <QStyle>
#include <QtCore/QDebug>
#include <QtCore/QLibraryInfo>
#include <QtCore/QList>
#include <QtCore/qlogging.h>
#include <QtCore/QStringList>
#include <iostream>
LogWidget *LogWidget::m_instance = nullptr;
bool LogWidget::m_lineNumberingEnabled = true;
bool LogWidget::m_showMessageType = true;
int LogWidget::m_indent = 0;
LogWidget::LogWidget(QWidget *parent)
: QPlainTextEdit(parent)
{
LogWidget::m_instance = this;
setReadOnly(true);
}
LogWidget::~LogWidget()
{
LogWidget::m_instance = nullptr;
}
QString LogWidget::startupMessage()
{
QString result;
result += QLatin1String(QLibraryInfo::build());
const QCoreApplication *coreApp = QCoreApplication::instance();
if (qobject_cast<const QGuiApplication *>(coreApp)) {
result += QLatin1Char(' ');
result += QGuiApplication::platformName();
}
if (qobject_cast<const QApplication *>(coreApp)) {
result += QLatin1Char(' ');
result += QApplication::style()->objectName();
}
if (coreApp) {
QStringList arguments = QCoreApplication::arguments();
arguments.pop_front();
if (!arguments.isEmpty()) {
result += QLatin1Char('\n');
result += arguments.join(QLatin1String(" "));
}
}
return result;
}
static const QList<QString> &messageTypes()
{
static QList<QString> result;
if (result.isEmpty()) {
result << QLatin1String("debug") << QLatin1String("warn")
<< QLatin1String("critical") << QLatin1String("fatal")
<< QLatin1String("info");
}
return result;
}
static void messageHandler(QtMsgType type, const QString &text)
{
static int n = 0;
QString message;
if (LogWidget::lineNumberingEnabled())
message.append(QString::fromLatin1("%1 ").arg(n, 4, 10, QLatin1Char('0')));
if (LogWidget::showMessageType()) {
message.append(messageTypes().at(type));
message.append(QLatin1Char(' '));
}
for (int i = 0, ie = LogWidget::indent(); i < ie; ++i)
message.append(QLatin1Char(' '));
message.append(text);
if (LogWidget *logWindow = LogWidget::instance())
logWindow->appendText(message);
#ifdef Q_OS_WIN
std::wcerr << reinterpret_cast<const wchar_t *>(message.utf16()) << L'\n';
#else
std::cerr << qPrintable(message) << '\n';
#endif
n++;
}
static void qtMessageHandler(QtMsgType type, const QMessageLogContext &, const QString &text)
{ messageHandler(type, text); }
void LogWidget::install()
{
qInstallMessageHandler(qtMessageHandler);
qInfo("%s", qPrintable(LogWidget::startupMessage()));
}
void LogWidget::uninstall() { qInstallMessageHandler(nullptr); }
void LogWidget::appendText(const QString &message)
{
appendPlainText(message);
ensureCursorVisible();
}
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