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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 "dotview.h"
#include <QtCore/QDebug>
#include <QtCore/QDir>
#include <QtCore/QFile>
#include <QtCore/QProcess>
#include <QtCore/QTemporaryFile>
using namespace Qt::StringLiterals;
bool showDotGraph(const QString &name, const QString &graph)
{
constexpr auto imageType = "jpg"_L1;
// Write out the graph to a temporary file
QTemporaryFile dotFile(QDir::tempPath() + u'/' + name + u"_XXXXXX.dot"_s);
if (!dotFile.open()) {
qWarning("Cannot open temporary file: %s", qPrintable(dotFile.errorString()));
return false;
}
const QString tempDotFile = dotFile.fileName();
dotFile.write(graph.toUtf8());
dotFile.close();
// Convert to image using "dot"
const QString imageFile = tempDotFile.left(tempDotFile.size() - 3) + imageType;
QProcess process;
process.start(u"dot"_s, {u"-T"_s + imageType, u"-o"_s + imageFile, tempDotFile});
if (!process.waitForStarted() || !process.waitForFinished()) {
qWarning("Image conversion failed: %s", qPrintable(process.errorString()));
return false;
}
if (process.exitStatus() != QProcess::NormalExit || process.exitCode() != 0) {
qWarning("Image conversion failed (%d): %s",
process.exitCode(),
process.readAllStandardError().constData());
return false;
}
// Launch image. Should use QDesktopServices::openUrl(),
// but we don't link against QtGui
#ifdef Q_OS_UNIX
constexpr auto imageViewer = "gwenview"_L1;
#else
constexpr auto imageViewer = "mspaint"_L1;
#endif
if (!QProcess::startDetached(imageViewer, {imageFile})) {
qWarning("Failed to launch viewer: %s", qPrintable(imageViewer));
return false;
}
qInfo().noquote().nospace() << "Viewing: "
<< QDir::toNativeSeparators(tempDotFile)
<< ' ' << QDir::toNativeSeparators(imageFile);
return true;
}
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