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++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include <QtCore/QFileInfo>
++ #include <QtCore/QLibraryInfo>
++ #include <QtCore/QStandardPaths>
++ #include <QtWidgets/QApplication>
++ #include <QtHelp/QHelpEngineCore>
++
++ #include "helpbrowser.h"
++ #include "qhelplink.h"
++
++ using namespace Qt::StringLiterals;
++
++ static QString documentationDirectory()
++ {
++ QStringList paths;
++ #ifdef SRCDIR
++ paths.append(QLatin1StringView(SRCDIR));
++ #endif
++ paths.append(QLibraryInfo::path(QLibraryInfo::ExamplesPath));
++ paths.append(QCoreApplication::applicationDirPath());
++ paths.append(QStandardPaths::standardLocations(QStandardPaths::AppDataLocation));
++ for (const auto &dir : std::as_const(paths)) {
++ const QString path = dir + "/docs"_L1;
++ if (QFileInfo::exists(path))
++ return path;
++ }
++ return {};
++ }
++
++ HelpBrowser::HelpBrowser(QWidget *parent)
++ : QTextBrowser(parent)
++ {
++ const QString collectionFile = documentationDirectory() + "/wateringmachine.qhc"_L1;
++
++ m_helpEngine = new QHelpEngineCore(collectionFile, this);
++ if (!m_helpEngine->setupData()) {
++ delete m_helpEngine;
++ m_helpEngine = nullptr;
++ }
++ }
++
++ void HelpBrowser::showHelpForKeyword(const QString &id)
++ {
++ if (m_helpEngine) {
++ QList<QHelpLink> documents = m_helpEngine->documentsForIdentifier(id);
++ if (documents.count())
++ setSource(documents.first().url);
++ }
++ }
++
++ QVariant HelpBrowser::loadResource(int type, const QUrl &name)
++ {
++ QByteArray ba;
++ if (type < 4 && m_helpEngine) {
++ QUrl url(name);
++ if (name.isRelative())
++ url = source().resolved(url);
++ ba = m_helpEngine->fileData(url);
++ }
++ return ba;
++ }
++