htmlinfo.cpp Example File

    /****************************************************************************
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     ** Portions Copyright (C) 2012 Research In Motion Limited.
     ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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    #include "htmlinfo.hpp"

    #include <QtCore/QFile>
    #include <QtCore/QStringList>
    #include <QtCore/QXmlStreamReader>

    HtmlInfo::HtmlInfo(QObject *parent)
        : QObject(parent)
    {
    }

    void HtmlInfo::parseHtmlFile(const QString &fileName)
    {
        QFile file(fileName);

        // Reset the error flag
        m_error.clear();
        emit errorChanged();

        // Try to open the XHTML document and report an error if it fails
        if (!file.open(QIODevice::ReadOnly)) {
            m_error = tr("Couldn't open the file.");
            emit errorChanged();
            return;
        }

        // Create a XML stream reader on the file
        QXmlStreamReader reader(&file);

        int paragraphCount = 0;
        QStringList links;
        QString title;
        /**
         * Read the XHTML document token by token until the end is reached.
         * For every token check whether it's one we are interested in and extract
         * the needed information.
         */
        while (!reader.atEnd()) {
            reader.readNext();
            if (reader.isStartElement()) {
                if (reader.name() == "title")
                    title = reader.readElementText();
                else if (reader.name() == "a")
                    links.append(reader.attributes().value("href").toString());
                else if (reader.name() == "p")
                    ++paragraphCount;
            }
        }

        // If the XML stream reader signaled an error, report it to the UI
        if (reader.hasError()) {
            m_error = tr("The HTML file isn't well-formed: %1").arg(reader.errorString());
            emit errorChanged();
            return;
        }

        // Update the properties with the extracted information
        m_title = title.simplified();
        m_paragraphs = paragraphCount;
        m_links = links.size();
        m_linksContent = links.join("\n");

        // Notify the UI that the properties have changed
        emit infoChanged();
    }

    QString HtmlInfo::title() const
    {
        return m_title;
    }

    int HtmlInfo::paragraphs() const
    {
        return m_paragraphs;
    }

    int HtmlInfo::links() const
    {
        return m_links;
    }

    QString HtmlInfo::linksContent() const
    {
        return m_linksContent;
    }

    QString HtmlInfo::error() const
    {
        return m_error;
    }