xbel.cpp Example File

webenginewidgets/demobrowser/xbel.cpp
/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, 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 The Qt Company Ltd 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, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/
#include "xbel.h" #include <QtCore/QFile> BookmarkNode::BookmarkNode(BookmarkNode::Type type, BookmarkNode *parent) : expanded(false) , m_parent(parent) , m_type(type) { if (parent) parent->add(this); } BookmarkNode::~BookmarkNode() { if (m_parent) m_parent->remove(this); qDeleteAll(m_children); m_parent = 0; m_type = BookmarkNode::Root; } bool BookmarkNode::operator==(const BookmarkNode &other) { if (url != other.url || title != other.title || desc != other.desc || expanded != other.expanded || m_type != other.m_type || m_children.count() != other.m_children.count()) return false; for (int i = 0; i < m_children.count(); ++i) if (!((*(m_children[i])) == (*(other.m_children[i])))) return false; return true; } BookmarkNode::Type BookmarkNode::type() const { return m_type; } void BookmarkNode::setType(Type type) { m_type = type; } QList<BookmarkNode *> BookmarkNode::children() const { return m_children; } BookmarkNode *BookmarkNode::parent() const { return m_parent; } void BookmarkNode::add(BookmarkNode *child, int offset) { Q_ASSERT(child->m_type != Root); if (child->m_parent) child->m_parent->remove(child); child->m_parent = this; if (-1 == offset) offset = m_children.size(); m_children.insert(offset, child); } void BookmarkNode::remove(BookmarkNode *child) { child->m_parent = 0; m_children.removeAll(child); } XbelReader::XbelReader() { } BookmarkNode *XbelReader::read(const QString &fileName) { QFile file(fileName); if (!file.exists()) { return new BookmarkNode(BookmarkNode::Root); } file.open(QFile::ReadOnly); return read(&file); } BookmarkNode *XbelReader::read(QIODevice *device) { BookmarkNode *root = new BookmarkNode(BookmarkNode::Root); setDevice(device); if (readNextStartElement()) { QString version = attributes().value(QLatin1String("version")).toString(); if (name() == QLatin1String("xbel") && (version.isEmpty() || version == QLatin1String("1.0"))) { readXBEL(root); } else { raiseError(QObject::tr("The file is not an XBEL version 1.0 file.")); } } return root; } void XbelReader::readXBEL(BookmarkNode *parent) { Q_ASSERT(isStartElement() && name() == QLatin1String("xbel")); while (readNextStartElement()) { if (name() == QLatin1String("folder")) readFolder(parent); else if (name() == QLatin1String("bookmark")) readBookmarkNode(parent); else if (name() == QLatin1String("separator")) readSeparator(parent); else skipCurrentElement(); } } void XbelReader::readFolder(BookmarkNode *parent) { Q_ASSERT(isStartElement() && name() == QLatin1String("folder")); BookmarkNode *folder = new BookmarkNode(BookmarkNode::Folder, parent); folder->expanded = (attributes().value(QLatin1String("folded")) == QLatin1String("no")); while (readNextStartElement()) { if (name() == QLatin1String("title")) readTitle(folder); else if (name() == QLatin1String("desc")) readDescription(folder); else if (name() == QLatin1String("folder")) readFolder(folder); else if (name() == QLatin1String("bookmark")) readBookmarkNode(folder); else if (name() == QLatin1String("separator")) readSeparator(folder); else skipCurrentElement(); } } void XbelReader::readTitle(BookmarkNode *parent) { Q_ASSERT(isStartElement() && name() == QLatin1String("title")); parent->title = readElementText(); } void XbelReader::readDescription(BookmarkNode *parent) { Q_ASSERT(isStartElement() && name() == QLatin1String("desc")); parent->desc = readElementText(); } void XbelReader::readSeparator(BookmarkNode *parent) { new BookmarkNode(BookmarkNode::Separator, parent); // empty elements have a start and end element readNext(); } void XbelReader::readBookmarkNode(BookmarkNode *parent) { Q_ASSERT(isStartElement() && name() == QLatin1String("bookmark")); BookmarkNode *bookmark = new BookmarkNode(BookmarkNode::Bookmark, parent); bookmark->url = attributes().value(QLatin1String("href")).toString(); while (readNextStartElement()) { if (name() == QLatin1String("title")) readTitle(bookmark); else if (name() == QLatin1String("desc")) readDescription(bookmark); else skipCurrentElement(); } if (bookmark->title.isEmpty()) bookmark->title = QObject::tr("Unknown title"); } XbelWriter::XbelWriter() { setAutoFormatting(true); } bool XbelWriter::write(const QString &fileName, const BookmarkNode *root) { QFile file(fileName); if (!root || !file.open(QFile::WriteOnly)) return false; return write(&file, root); } bool XbelWriter::write(QIODevice *device, const BookmarkNode *root) { setDevice(device); writeStartDocument(); writeDTD(QLatin1String("<!DOCTYPE xbel>")); writeStartElement(QLatin1String("xbel")); writeAttribute(QLatin1String("version"), QLatin1String("1.0")); if (root->type() == BookmarkNode::Root) { for (int i = 0; i < root->children().count(); ++i) writeItem(root->children().at(i)); } else { writeItem(root); } writeEndDocument(); return true; } void XbelWriter::writeItem(const BookmarkNode *parent) { switch (parent->type()) { case BookmarkNode::Folder: writeStartElement(QLatin1String("folder")); writeAttribute(QLatin1String("folded"), parent->expanded ? QLatin1String("no") : QLatin1String("yes")); writeTextElement(QLatin1String("title"), parent->title); for (int i = 0; i < parent->children().count(); ++i) writeItem(parent->children().at(i)); writeEndElement(); break; case BookmarkNode::Bookmark: writeStartElement(QLatin1String("bookmark")); if (!parent->url.isEmpty()) writeAttribute(QLatin1String("href"), parent->url); writeTextElement(QLatin1String("title"), parent->title); if (!parent->desc.isEmpty()) writeAttribute(QLatin1String("desc"), parent->desc); writeEndElement(); break; case BookmarkNode::Separator: writeEmptyElement(QLatin1String("separator")); break; default: break; } }