qt-everywhere-src-5.15.1/qtbase/examples/xml/dombookmarks/xbeltree.cpp - orbit - Git at Google

 /****************************************************************************
 **
 ** 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 <QtWidgets>

 #include "xbeltree.h"

 enum { DomElementRole = Qt::UserRole + 1 };

 Q_DECLARE_METATYPE(QDomElement)

 static inline QString titleElement() { return QStringLiteral("title"); }
 static inline QString folderElement() { return QStringLiteral("folder"); }
 static inline QString bookmarkElement() { return QStringLiteral("bookmark"); }

 static inline QString versionAttribute() { return QStringLiteral("version"); }
 static inline QString hrefAttribute() { return QStringLiteral("href"); }
 static inline QString foldedAttribute() { return QStringLiteral("folded"); }

 XbelTree::XbelTree(QWidget *parent)
     : QTreeWidget(parent)
 {
     QStringList labels;
     labels << tr("Title") << tr("Location");

     header()->setSectionResizeMode(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));
 }

 #if !defined(QT_NO_CONTEXTMENU) && !defined(QT_NO_CLIPBOARD)
 void XbelTree::contextMenuEvent(QContextMenuEvent *event)
 {
     const QTreeWidgetItem *item = itemAt(event->pos());
     if (!item)
         return;
     const QString url = item->text(1);
     QMenu contextMenu;
     QAction *copyAction = contextMenu.addAction(tr("Copy Link to Clipboard"));
     QAction *openAction = contextMenu.addAction(tr("Open"));
     QAction *action = contextMenu.exec(event->globalPos());
     if (action == copyAction)
         QGuiApplication::clipboard()->setText(url);
     else if (action == openAction)
         QDesktopServices::openUrl(QUrl(url));
 }
 #endif // !QT_NO_CONTEXTMENU && !QT_NO_CLIPBOARD

 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(versionAttribute())
                && root.attribute(versionAttribute()) != QLatin1String("1.0")) {
         QMessageBox::information(window(), tr("DOM Bookmarks"),
                                  tr("The file is not an XBEL version 1.0 "
                                     "file."));
         return false;
     }

     clear();

     disconnect(this, &QTreeWidget::itemChanged, this, &XbelTree::updateDomElement);

     QDomElement child = root.firstChildElement(folderElement());
     while (!child.isNull()) {
         parseFolderElement(child);
         child = child.nextSiblingElement(folderElement());
     }

     connect(this, &QTreeWidget::itemChanged, this, &XbelTree::updateDomElement);

     return true;
 }

 bool XbelTree::write(QIODevice *device) const
 {
     const int IndentSize = 4;

     QTextStream out(device);
     domDocument.save(out, IndentSize);
     return true;
 }

 void XbelTree::updateDomElement(const QTreeWidgetItem *item, int column)
 {
     QDomElement element = qvariant_cast<QDomElement>(item->data(0, DomElementRole));
     if (!element.isNull()) {
         if (column == 0) {
             QDomElement oldTitleElement = element.firstChildElement(titleElement());
             QDomElement newTitleElement = domDocument.createElement(titleElement());

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

             element.replaceChild(newTitleElement, oldTitleElement);
         } else {
             if (element.tagName() == bookmarkElement())
                 element.setAttribute(hrefAttribute(), item->text(1));
         }
     }
 }

 void XbelTree::parseFolderElement(const QDomElement &element,
                                   QTreeWidgetItem *parentItem)
 {
     QTreeWidgetItem *item = createItem(element, parentItem);

     QString title = element.firstChildElement(titleElement()).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(foldedAttribute()) != QLatin1String("no"));
     item->setExpanded(!folded);

     QDomElement child = element.firstChildElement();
     while (!child.isNull()) {
         if (child.tagName() == folderElement()) {
             parseFolderElement(child, item);
         } else if (child.tagName() == bookmarkElement()) {
             QTreeWidgetItem *childItem = createItem(child, item);

             QString title = child.firstChildElement(titleElement()).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(hrefAttribute()));
         } else if (child.tagName() == QLatin1String("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);
     }
     item->setData(0, DomElementRole, QVariant::fromValue(element));
     return item;
 }
	/****************************************************************************
	**
	** 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 <QtWidgets>

	#include "xbeltree.h"

	enum { DomElementRole = Qt::UserRole + 1 };

	Q_DECLARE_METATYPE(QDomElement)

	static inline QString titleElement() { return QStringLiteral("title"); }
	static inline QString folderElement() { return QStringLiteral("folder"); }
	static inline QString bookmarkElement() { return QStringLiteral("bookmark"); }

	static inline QString versionAttribute() { return QStringLiteral("version"); }
	static inline QString hrefAttribute() { return QStringLiteral("href"); }
	static inline QString foldedAttribute() { return QStringLiteral("folded"); }

	XbelTree::XbelTree(QWidget *parent)
	: QTreeWidget(parent)
	{
	QStringList labels;
	labels << tr("Title") << tr("Location");

	header()->setSectionResizeMode(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));
	}

	#if !defined(QT_NO_CONTEXTMENU) && !defined(QT_NO_CLIPBOARD)
	void XbelTree::contextMenuEvent(QContextMenuEvent *event)
	{
	const QTreeWidgetItem *item = itemAt(event->pos());
	if (!item)
	return;
	const QString url = item->text(1);
	QMenu contextMenu;
	QAction *copyAction = contextMenu.addAction(tr("Copy Link to Clipboard"));
	QAction *openAction = contextMenu.addAction(tr("Open"));
	QAction *action = contextMenu.exec(event->globalPos());
	if (action == copyAction)
	QGuiApplication::clipboard()->setText(url);
	else if (action == openAction)
	QDesktopServices::openUrl(QUrl(url));
	}
	#endif // !QT_NO_CONTEXTMENU && !QT_NO_CLIPBOARD

	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(versionAttribute())
	&& root.attribute(versionAttribute()) != QLatin1String("1.0")) {
	QMessageBox::information(window(), tr("DOM Bookmarks"),
	tr("The file is not an XBEL version 1.0 "
	"file."));
	return false;
	}

	clear();

	disconnect(this, &QTreeWidget::itemChanged, this, &XbelTree::updateDomElement);

	QDomElement child = root.firstChildElement(folderElement());
	while (!child.isNull()) {
	parseFolderElement(child);
	child = child.nextSiblingElement(folderElement());
	}

	connect(this, &QTreeWidget::itemChanged, this, &XbelTree::updateDomElement);

	return true;
	}

	bool XbelTree::write(QIODevice *device) const
	{
	const int IndentSize = 4;

	QTextStream out(device);
	domDocument.save(out, IndentSize);
	return true;
	}

	void XbelTree::updateDomElement(const QTreeWidgetItem *item, int column)
	{
	QDomElement element = qvariant_cast<QDomElement>(item->data(0, DomElementRole));
	if (!element.isNull()) {
	if (column == 0) {
	QDomElement oldTitleElement = element.firstChildElement(titleElement());
	QDomElement newTitleElement = domDocument.createElement(titleElement());

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

	element.replaceChild(newTitleElement, oldTitleElement);
	} else {
	if (element.tagName() == bookmarkElement())
	element.setAttribute(hrefAttribute(), item->text(1));
	}
	}
	}

	void XbelTree::parseFolderElement(const QDomElement &element,
	QTreeWidgetItem *parentItem)
	{
	QTreeWidgetItem *item = createItem(element, parentItem);

	QString title = element.firstChildElement(titleElement()).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(foldedAttribute()) != QLatin1String("no"));
	item->setExpanded(!folded);

	QDomElement child = element.firstChildElement();
	while (!child.isNull()) {
	if (child.tagName() == folderElement()) {
	parseFolderElement(child, item);
	} else if (child.tagName() == bookmarkElement()) {
	QTreeWidgetItem *childItem = createItem(child, item);

	QString title = child.firstChildElement(titleElement()).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(hrefAttribute()));
	} else if (child.tagName() == QLatin1String("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);
	}
	item->setData(0, DomElementRole, QVariant::fromValue(element));
	return item;
	}