File: grantleeformatter.cpp

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/*
    SPDX-FileCopyrightText: 2016 Pino Toscano <pino@kde.org>

    SPDX-License-Identifier: GPL-2.0-or-later
*/

#include "grantleeformatter.h"

#include "docentry.h"
#include "glossary.h"
#include "khc_debug.h"

#include <KTextTemplate/Context>
#include <KTextTemplate/Engine>
#include <KTextTemplate/Template>
#include <KTextTemplate/TemplateLoader>

#include <KLocalizedString>

#include <QStandardPaths>

using namespace KHC;
class PlainOutputStream : public KTextTemplate::OutputStream
{
public:
    explicit PlainOutputStream(QTextStream *stream)
        : KTextTemplate::OutputStream(stream)
    {
    }

    QString escape(const QString &input) const override
    {
        return input;
    }

    QSharedPointer<OutputStream> clone(QTextStream *stream) const override
    {
        return QSharedPointer<OutputStream>(new PlainOutputStream(stream));
    }
};

struct GrantleeFormatter::Private {
    QString format(KTextTemplate::Template t, KTextTemplate::Context *ctx);

    KTextTemplate::Engine engine;
};

QString GrantleeFormatter::Private::format(KTextTemplate::Template t, KTextTemplate::Context *ctx)
{
    QString result;
    QTextStream textStream(&result);
    PlainOutputStream stream(&textStream);
    t->render(&stream, ctx);
    if (t->error()) {
        qCWarning(KHC_LOG) << "GrantleeFormatter rendering error:" << t->errorString();
    }

    return result;
}

GrantleeFormatter::GrantleeFormatter()
    : d(new Private)
{
    QSharedPointer<KTextTemplate::FileSystemTemplateLoader> loader(new KTextTemplate::FileSystemTemplateLoader);
    loader->setTemplateDirs(QStandardPaths::locateAll(QStandardPaths::AppDataLocation, QStringLiteral("templates"), QStandardPaths::LocateDirectory));
    d->engine.addTemplateLoader(loader);
}

GrantleeFormatter::~GrantleeFormatter()
{
    delete d;
}

QString GrantleeFormatter::formatOverview(const QString &title, const QString &name, const QString &content)
{
    KTextTemplate::Template t = d->engine.loadByName(QStringLiteral("index.html"));
    KTextTemplate::Context ctx;
    ctx.insert(QStringLiteral("title"), title);
    ctx.insert(QStringLiteral("name"), name);
    ctx.insert(QStringLiteral("content"), content);

    return d->format(t, &ctx);
}

QString GrantleeFormatter::formatGlossaryEntry(const GlossaryEntry &entry)
{
    KTextTemplate::Template t = d->engine.loadByName(QStringLiteral("glossary.html"));
    KTextTemplate::Context ctx;

    const GlossaryEntryXRef::List entrySeeAlso = entry.seeAlso();
    QStringList seeAlso;
    seeAlso.reserve(entrySeeAlso.count());
    for (const GlossaryEntryXRef &xref : entrySeeAlso) {
        seeAlso += QStringLiteral("<a href=\"glossentry:%1\">%2</a>").arg(xref.id(), xref.term());
    }

    ctx.insert(QStringLiteral("htmltitle"), i18nc("%1 is a glossary term", "KDE Glossary: %1", entry.term()));
    ctx.insert(QStringLiteral("title"), i18n("KDE Glossary"));
    ctx.insert(QStringLiteral("term"), entry.term());
    ctx.insert(QStringLiteral("definition"), entry.definition());
    ctx.insert(QStringLiteral("seeAlsoCount"), seeAlso.count());
    ctx.insert(QStringLiteral("seeAlso"), i18n("See also: %1", seeAlso.join(QLatin1String(", "))));

    return d->format(t, &ctx);
}

QString GrantleeFormatter::formatSearchResults(const QString &words, const QList<QPair<DocEntry *, QString>> &results)
{
    KTextTemplate::Template t = d->engine.loadByName(QStringLiteral("search.html"));
    KTextTemplate::Context ctx;

    typedef QPair<DocEntry *, QString> Iter;
    QVariantList list;
    list.reserve(results.count());
    for (const Iter &it : results) {
        QVariantHash h;
        h.insert(QStringLiteral("title"), it.first->name());
        h.insert(QStringLiteral("content"), it.second);
        list += h;
    }

    ctx.insert(QStringLiteral("htmltitle"), i18n("Search Results"));
    ctx.insert(QStringLiteral("title"), i18n("Search Results for '%1':", words.toHtmlEscaped()));
    ctx.insert(QStringLiteral("results"), list);

    return d->format(t, &ctx);
}