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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** 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.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
#ifndef Patternist_AccelTreeBuilder_H
#define Patternist_AccelTreeBuilder_H
#include <QSet>
#include <QStack>
#include "private/qxmlutils_p.h"
#include "qacceltree_p.h"
#include "qbuiltintypes_p.h"
#include "qcompressedwhitespace_p.h"
#include "qnamepool_p.h"
#include "qnodebuilder_p.h"
#include "qreportcontext_p.h"
#include "qsourcelocationreflection_p.h"
#include "qpatternistlocale_p.h"
#include <QtDebug>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
namespace QPatternist
{
/**
* @short Builds an AccelTree from a stream of XML/Item events
* received through the NodeBuilder interface.
*
* If FromDocument is @c true, it is assumed that AccelTreeBuilder is fed
* events from an XML document, otherwise it is assumed the events
* are from node constructor expressions.
*
* @author Frans Englich <frans.englich@nokia.com>
*/
template<bool FromDocument>
class AccelTreeBuilder : public NodeBuilder
, public SourceLocationReflection
{
public:
typedef QExplicitlySharedDataPointer<AccelTreeBuilder> Ptr;
/**
* Describes the memory relevant features the builder shall support.
*/
enum Feature
{
NoneFeature, ///< No special features are enabled.
SourceLocationsFeature = 1 ///< The accel tree builder will store source locations for each start element.
};
Q_DECLARE_FLAGS(Features, Feature)
/**
* @param context may be @c null.
*/
AccelTreeBuilder(const QUrl &docURI,
const QUrl &baseURI,
const NamePool::Ptr &np,
ReportContext *const context,
Features features = NoneFeature);
virtual void startDocument();
virtual void endDocument();
virtual void startElement(const QXmlName &name);
void startElement(const QXmlName &name, qint64 line, qint64 column);
virtual void endElement();
virtual void attribute(const QXmlName &name, const QStringRef &value);
virtual void characters(const QStringRef &ch);
virtual void whitespaceOnly(const QStringRef &ch);
virtual void processingInstruction(const QXmlName &target,
const QString &data);
virtual void namespaceBinding(const QXmlName &nb);
virtual void comment(const QString &content);
virtual void item(const Item &it);
virtual QAbstractXmlNodeModel::Ptr builtDocument();
virtual NodeBuilder::Ptr create(const QUrl &baseURI) const;
virtual void startOfSequence();
virtual void endOfSequence();
inline AccelTree::Ptr builtDocument() const
{
return m_document;
}
virtual void atomicValue(const QVariant &value);
virtual const SourceLocationReflection *actualReflection() const;
virtual QSourceLocation sourceLocation() const;
private:
inline void startStructure();
inline AccelTree::PreNumber currentDepth() const
{
return m_ancestors.count() -1;
}
inline AccelTree::PreNumber currentParent() const
{
return m_ancestors.isEmpty() ? -1 : m_ancestors.top();
}
enum Constants
{
DefaultNodeStackSize = 10,
SizeIsEmpty = 0
};
AccelTree::PreNumber m_preNumber;
bool m_isPreviousAtomic;
bool m_hasCharacters;
/**
* Whether m_characters has been run through
* CompressedWhitespace::compress().
*/
bool m_isCharactersCompressed;
QString m_characters;
NamePool::Ptr m_namePool;
AccelTree::Ptr m_document;
QStack<AccelTree::PreNumber> m_ancestors;
QStack<AccelTree::PreNumber> m_size;
/** If we have already commenced a document, we don't want to
* add more document nodes. We keep track of them with this
* counter, which ensures that startDocument() and endDocument()
* are skipped consistently. */
AccelTree::PreNumber m_skippedDocumentNodes;
/**
* All attribute values goes through this set such that we store only
* one QString for identical attribute values.
*/
QSet<QString> m_attributeCompress;
const QUrl m_documentURI;
/**
* We don't store a reference pointer here because then we get a
* circular reference with GenericDynamicContext, when it stores us as
* a member.
*/
ReportContext *const m_context;
Features m_features;
};
Q_DECLARE_OPERATORS_FOR_FLAGS(AccelTreeBuilder<true>::Features)
Q_DECLARE_OPERATORS_FOR_FLAGS(AccelTreeBuilder<false>::Features)
#include "qacceltreebuilder.cpp"
}
QT_END_NAMESPACE
QT_END_HEADER
#endif
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