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#include <QtGui>

#include "xbeltree.h"

XbelTree::XbelTree(QWidget *parent)

    : QTreeWidget(parent)

{

    QStringList labels;

    labels << tr("Title") << tr("Location");

    header()->setResizeMode(QHeaderView::Stretch);

    setHeaderLabels(labels);

    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));

}

bool XbelTree::read(QIODevice *device)

{

    QString errorStr;

    int errorLine;

    int errorColumn;

    if (!domDocument.setContent(device, true, &errorStr, &errorLine,

                                &errorColumn)) {

        QMessageBox::information(window(), tr("DOM Bookmarks"),

                                 tr("Parse error at line %1, column %2:\n%3")

                                 .arg(errorLine)

                                 .arg(errorColumn)

                                 .arg(errorStr));

        return false;

    }

    QDomElement root = domDocument.documentElement();

    if (root.tagName() != "xbel") {

        QMessageBox::information(window(), tr("DOM Bookmarks"),

                                 tr("The file is not an XBEL file."));

        return false;

    } else if (root.hasAttribute("version")

               && root.attribute("version") != "1.0") {

        QMessageBox::information(window(), tr("DOM Bookmarks"),

                                 tr("The file is not an XBEL version 1.0 "

                                    "file."));

        return false;

    }

    clear();

    disconnect(this, SIGNAL(itemChanged(QTreeWidgetItem*,int)),

               this, SLOT(updateDomElement(QTreeWidgetItem*,int)));

    QDomElement child = root.firstChildElement("folder");

    while (!child.isNull()) {

        parseFolderElement(child);

        child = child.nextSiblingElement("folder");

    }

    connect(this, SIGNAL(itemChanged(QTreeWidgetItem*,int)),

            this, SLOT(updateDomElement(QTreeWidgetItem*,int)));

    return true;

}

bool XbelTree::write(QIODevice *device)

{

    const int IndentSize = 4;

    QTextStream out(device);

    domDocument.save(out, IndentSize);

    return true;

}

void XbelTree::updateDomElement(QTreeWidgetItem *item, int column)

{

    QDomElement element = domElementForItem.value(item);

    if (!element.isNull()) {

        if (column == 0) {

            QDomElement oldTitleElement = element.firstChildElement("title");

            QDomElement newTitleElement = domDocument.createElement("title");

            QDomText newTitleText = domDocument.createTextNode(item->text(0));

            newTitleElement.appendChild(newTitleText);

            element.replaceChild(newTitleElement, oldTitleElement);

        } else {

            if (element.tagName() == "bookmark")

                element.setAttribute("href", item->text(1));

        }

    }

}

void XbelTree::parseFolderElement(const QDomElement &element,

                                  QTreeWidgetItem *parentItem)

{

    QTreeWidgetItem *item = createItem(element, parentItem);

    QString title = element.firstChildElement("title").text();

    if (title.isEmpty())

        title = QObject::tr("Folder");

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

    item->setIcon(0, folderIcon);

    item->setText(0, title);

    bool folded = (element.attribute("folded") != "no");

    setItemExpanded(item, !folded);

    QDomElement child = element.firstChildElement();

    while (!child.isNull()) {

        if (child.tagName() == "folder") {

            parseFolderElement(child, item);

        } else if (child.tagName() == "bookmark") {

            QTreeWidgetItem *childItem = createItem(child, item);

            QString title = child.firstChildElement("title").text();

            if (title.isEmpty())

                title = QObject::tr("Folder");

            childItem->setFlags(item->flags() | Qt::ItemIsEditable);

            childItem->setIcon(0, bookmarkIcon);

            childItem->setText(0, title);

            childItem->setText(1, child.attribute("href"));

        } else if (child.tagName() == "separator") {

            QTreeWidgetItem *childItem = createItem(child, item);

            childItem->setFlags(item->flags() & ~(Qt::ItemIsSelectable | Qt::ItemIsEditable));

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

        }

        child = child.nextSiblingElement();

    }

}

QTreeWidgetItem *XbelTree::createItem(const QDomElement &element,

                                      QTreeWidgetItem *parentItem)

{

    QTreeWidgetItem *item;

    if (parentItem) {

        item = new QTreeWidgetItem(parentItem);

    } else {

        item = new QTreeWidgetItem(this);

    }

    domElementForItem.insert(item, element);

    return item;

}