/*
    Kchmviewer - a CHM and EPUB file viewer with broad language support
    SPDX-FileCopyrightText: 2004-2014 George Yunaev gyunaev@ulduzsoft.com

    SPDX-License-Identifier: GPL-3.0-or-later
*/

#include "helperxmlhandler_epubtoc.h"
#include <QtDebug>

HelperXmlHandler_EpubTOC::HelperXmlHandler_EpubTOC(EBook_EPUB *epub)
{
    m_epub = epub;
    m_inNavMap = false;
    m_inText = false;
    m_indent = 0;
}

bool HelperXmlHandler_EpubTOC::startElement(const QString &, const QString &localName, const QString &, const QXmlAttributes &atts)
{
    //	qDebug() << "startElement " << " " << localName;

    //	for ( int i = 0; i < atts.count(); i++ )
    //		qDebug() << "    " << atts.localName(i) << " " << atts.value(i);

    if (localName == QLatin1String("navMap")) {
        m_inNavMap = true;
        return true;
    }

    if (!m_inNavMap) {
        return true;
    }

    if (localName == QLatin1String("navPoint")) {
        m_indent++;
    }

    if (localName == QLatin1String("text")) {
        m_inText = true;
    }

    if (localName == QLatin1String("content")) {
        int idx = atts.index(QLatin1String("src"));

        if (idx == -1) {
            return false;
        }

        m_lastId = atts.value(idx);
        checkNewTocEntry();
    }

    return true;
}

bool HelperXmlHandler_EpubTOC::characters(const QString &ch)
{
    //	qDebug() << "characters" << " " << ch;
    if (m_inText) {
        m_lastTitle = ch;
    }

    checkNewTocEntry();
    return true;
}

bool HelperXmlHandler_EpubTOC::endElement(const QString &, const QString &localName, const QString &)
{
    //	qDebug() << "endElement" << " " << qName;

    if (localName == QLatin1String("navMap")) {
        m_inNavMap = false;
        return true;
    }

    if (localName == QLatin1String("navPoint")) {
        m_indent--;
    }

    if (localName == QLatin1String("text")) {
        m_inText = false;
    }

    return true;
}

void HelperXmlHandler_EpubTOC::checkNewTocEntry()
{
    if (!m_lastId.isEmpty() && !m_lastTitle.isEmpty()) {
        EBookTocEntry entry;
        entry.name = m_lastTitle;
        entry.url = m_epub->pathToUrl(m_lastId);
        entry.iconid = EBookTocEntry::IMAGE_AUTO;
        entry.indent = m_indent - 1;

        entries.push_back(entry);

        // qDebug() << "TOC entry: " << m_lastId << " :" << m_lastTitle << " :" << m_indent - 1;

        m_lastId.clear();
        m_lastTitle.clear();
    }
}