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#include <QtGui>

#include "xbelreader.h"

//! [0]

XbelReader::XbelReader(QTreeWidget *treeWidget)

    : treeWidget(treeWidget)

{

    QStyle *style = treeWidget->style();

    folderIcon.addPixmap(style->standardPixmap(QStyle::SP_DirClosedIcon),

                         QIcon::Normal, QIcon::Off);

    folderIcon.addPixmap(style->standardPixmap(QStyle::SP_DirOpenIcon),

                         QIcon::Normal, QIcon::On);

    bookmarkIcon.addPixmap(style->standardPixmap(QStyle::SP_FileIcon));

}

//! [0]

//! [1]

bool XbelReader::read(QIODevice *device)

{

    xml.setDevice(device);

    if (xml.readNextStartElement()) {

        if (xml.name() == "xbel" && xml.attributes().value("version") == "1.0")

            readXBEL();

        else

            xml.raiseError(QObject::tr("The file is not an XBEL version 1.0 file."));

    }

    return !xml.error();

}

//! [1]

//! [2]

QString XbelReader::errorString() const

{

    return QObject::tr("%1\nLine %2, column %3")

            .arg(xml.errorString())

            .arg(xml.lineNumber())

            .arg(xml.columnNumber());

}

//! [2]

//! [3]

void XbelReader::readXBEL()

{

    Q_ASSERT(xml.isStartElement() && xml.name() == "xbel");

    while (xml.readNextStartElement()) {

        if (xml.name() == "folder")

            readFolder(0);

        else if (xml.name() == "bookmark")

            readBookmark(0);

        else if (xml.name() == "separator")

            readSeparator(0);

        else

            xml.skipCurrentElement();

    }

}

//! [3]

//! [4]

void XbelReader::readTitle(QTreeWidgetItem *item)

{

    Q_ASSERT(xml.isStartElement() && xml.name() == "title");

    QString title = xml.readElementText();

    item->setText(0, title);

}

//! [4]

//! [5]

void XbelReader::readSeparator(QTreeWidgetItem *item)

{

    Q_ASSERT(xml.isStartElement() && xml.name() == "separator");

    QTreeWidgetItem *separator = createChildItem(item);

    separator->setFlags(item->flags() & ~Qt::ItemIsSelectable);

    separator->setText(0, QString(30, 0xB7));

    xml.skipCurrentElement();

}

//! [5]

void XbelReader::readFolder(QTreeWidgetItem *item)

{

    Q_ASSERT(xml.isStartElement() && xml.name() == "folder");

    QTreeWidgetItem *folder = createChildItem(item);

    bool folded = (xml.attributes().value("folded") != "no");

    treeWidget->setItemExpanded(folder, !folded);

    while (xml.readNextStartElement()) {

        if (xml.name() == "title")

            readTitle(folder);

        else if (xml.name() == "folder")

            readFolder(folder);

        else if (xml.name() == "bookmark")

            readBookmark(folder);

        else if (xml.name() == "separator")

            readSeparator(folder);

        else

            xml.skipCurrentElement();

    }

}

void XbelReader::readBookmark(QTreeWidgetItem *item)

{

    Q_ASSERT(xml.isStartElement() && xml.name() == "bookmark");

    QTreeWidgetItem *bookmark = createChildItem(item);

    bookmark->setFlags(bookmark->flags() | Qt::ItemIsEditable);

    bookmark->setIcon(0, bookmarkIcon);

    bookmark->setText(0, QObject::tr("Unknown title"));

    bookmark->setText(1, xml.attributes().value("href").toString());

    while (xml.readNextStartElement()) {

        if (xml.name() == "title")

            readTitle(bookmark);

        else

            xml.skipCurrentElement();

    }

}

QTreeWidgetItem *XbelReader::createChildItem(QTreeWidgetItem *item)

{

    QTreeWidgetItem *childItem;

    if (item) {

        childItem = new QTreeWidgetItem(item);

    } else {

        childItem = new QTreeWidgetItem(treeWidget);

    }

    childItem->setData(0, Qt::UserRole, xml.name().toString());

    return childItem;

}