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Diffstat (limited to 'src/xmlpatterns/api/qpullbridge.cpp')
| -rw-r--r-- | src/xmlpatterns/api/qpullbridge.cpp | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/src/xmlpatterns/api/qpullbridge.cpp b/src/xmlpatterns/api/qpullbridge.cpp new file mode 100644 index 0000000..80dac38 --- /dev/null +++ b/src/xmlpatterns/api/qpullbridge.cpp @@ -0,0 +1,232 @@ +/**************************************************************************** +** +** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtXmlPatterns module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QVariant> + +#include "qabstractxmlnodemodel_p.h" +#include "qitemmappingiterator_p.h" +#include "qitem_p.h" +#include "qxmlname.h" +#include "qxmlquery_p.h" + +#include "qpullbridge_p.h" + +QT_BEGIN_NAMESPACE + +using namespace QPatternist; + +/*! + \brief Bridges a QPatternist::SequenceIterator to QAbstractXmlPullProvider. + \class QPatternist::PullBridge + \internal + \reentrant + \ingroup xml-tools + + The approach of this class is rather straight forward since QPatternist::SequenceIterator + and QAbstractXmlPullProvider are conceptually similar. While QPatternist::SequenceIterator only + delivers top level items(since it's not an event stream, it's a list of items), PullBridge + needs to recursively iterate the children of nodes too, which is achieved through the + stack m_iterators. + */ + +AbstractXmlPullProvider::Event PullBridge::next() +{ + m_index = m_iterators.top().second->next(); + + if(!m_index.isNull()) + { + Item item(m_index); + + if(item && item.isAtomicValue()) + m_current = AtomicValue; + else + { + Q_ASSERT(item.isNode()); + + switch(m_index.kind()) + { + case QXmlNodeModelIndex::Attribute: + { + m_current = Attribute; + break; + } + case QXmlNodeModelIndex::Comment: + { + m_current = Comment; + break; + } + case QXmlNodeModelIndex::Element: + { + m_iterators.push(qMakePair(StartElement, m_index.iterate(QXmlNodeModelIndex::AxisChild))); + m_current = StartElement; + break; + } + case QXmlNodeModelIndex::Document: + { + m_iterators.push(qMakePair(StartDocument, m_index.iterate(QXmlNodeModelIndex::AxisChild))); + m_current = StartDocument; + break; + } + case QXmlNodeModelIndex::Namespace: + { + m_current = Namespace; + break; + } + case QXmlNodeModelIndex::ProcessingInstruction: + { + m_current = ProcessingInstruction; + break; + } + case QXmlNodeModelIndex::Text: + { + m_current = Text; + break; + } + } + } + } + else + { + if(m_iterators.isEmpty()) + m_current = EndOfInput; + else + { + switch(m_iterators.top().first) + { + case StartOfInput: + { + m_current = EndOfInput; + break; + } + case StartElement: + { + m_current = EndElement; + m_iterators.pop(); + break; + } + case StartDocument: + { + m_current = EndDocument; + m_iterators.pop(); + break; + } + default: + { + Q_ASSERT_X(false, Q_FUNC_INFO, + "Invalid value."); + m_current = EndOfInput; + } + } + } + + } + + return m_current; +} + +AbstractXmlPullProvider::Event PullBridge::current() const +{ + return m_current; +} + +QXmlNodeModelIndex PullBridge::index() const +{ + return m_index; +} + +QSourceLocation PullBridge::sourceLocation() const +{ + return m_index.model()->sourceLocation(m_index); +} + +QXmlName PullBridge::name() const +{ + return m_index.name(); +} + +QVariant PullBridge::atomicValue() const +{ + return QVariant(); +} + +QString PullBridge::stringValue() const +{ + return QString(); +} + +QHash<QXmlName, QString> PullBridge::attributes() +{ + Q_ASSERT(m_current == StartElement); + + QHash<QXmlName, QString> attributes; + + QXmlNodeModelIndex::Iterator::Ptr it = m_index.iterate(QXmlNodeModelIndex::AxisAttribute); + QXmlNodeModelIndex index = it->next(); + while (!index.isNull()) { + const Item attribute(index); + attributes.insert(index.name(), index.stringValue()); + + index = it->next(); + } + + return attributes; +} + +QHash<QXmlName, QXmlItem> PullBridge::attributeItems() +{ + Q_ASSERT(m_current == StartElement); + + QHash<QXmlName, QXmlItem> attributes; + + QXmlNodeModelIndex::Iterator::Ptr it = m_index.iterate(QXmlNodeModelIndex::AxisAttribute); + QXmlNodeModelIndex index = it->next(); + while (!index.isNull()) { + const Item attribute(index); + attributes.insert(index.name(), QXmlItem(index)); + + index = it->next(); + } + + return attributes; +} + +QT_END_NAMESPACE + |