qt5base-lts/examples/xml/streambookmarks/xbelreader.cpp

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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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** $QT_END_LICENSE$
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****************************************************************************/
#include <QtWidgets>
#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;
}