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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
//
// 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 <private/qacceltree_p.h>
#include <private/qbuiltintypes_p.h>
#include <private/qcompressedwhitespace_p.h>
#include <private/qnamepool_p.h>
#include <private/qnodebuilder_p.h>
#include <private/qreportcontext_p.h>
#include <private/qsourcelocationreflection_p.h>
#include <private/qpatternistlocale_p.h>
#include <QtDebug>
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);
void startDocument() override;
void endDocument() override;
void startElement(const QXmlName &name) override;
void startElement(const QXmlName &name, qint64 line, qint64 column);
void endElement() override;
void attribute(const QXmlName &name, const QStringRef &value) override;
void characters(const QStringRef &ch) override;
void whitespaceOnly(const QStringRef &ch) override;
void processingInstruction(const QXmlName &target,
const QString &data) override;
void namespaceBinding(const QXmlName &nb) override;
void comment(const QString &content) override;
void item(const Item &it) override;
QAbstractXmlNodeModel::Ptr builtDocument() override;
NodeBuilder::Ptr create(const QUrl &baseURI) const override;
void startOfSequence() override;
void endOfSequence() override;
inline AccelTree::Ptr builtDocument() const
{
return m_document;
}
void atomicValue(const QVariant &value) override;
const SourceLocationReflection *actualReflection() const override;
QSourceLocation sourceLocation() const override;
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_tpl_p.h"
}
QT_END_NAMESPACE
#endif
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