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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@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_PatternPlatform_H
#define Patternist_PatternPlatform_H
#include <QFlags>
#include <QRegExp>
#include "qfunctioncall_p.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
namespace QPatternist
{
/**
* @short Contains functionality for functions and expressions that
* uses regular expressions.
*
* @ingroup Patternist_utils
* @author Frans Englich <fenglich@trolltech.com>
*/
class PatternPlatform : public FunctionCall
{
public:
/**
* @see <a href="http://www.w3.org/TR/xpath-functions/#flags">XQuery 1.0 and
* XPath 2.0 Functions and Operators, 7.6.1.1 Flags</a>
*/
enum Flag
{
/**
* No flags are set. Default behavior is used.
*/
NoFlags = 0,
/**
* Flag @c s
*/
DotAllMode = 1,
/**
* Flag @c m
*/
MultiLineMode = 2,
/**
* Flag @c i
*/
CaseInsensitive = 4,
/**
* Flag @c x
*/
SimplifyWhitespace = 8
};
typedef QFlags<Flag> Flags;
virtual Expression::Ptr compress(const StaticContext::Ptr &context);
/**
* Retrieves the pattern supplied in the arguments, taking care of compiling it,
* settings its flags, and everything else required for getting it ready to use. If an error
* occurs, an appropriate error is raised via @p context.
*/
const QRegExp pattern(const DynamicContext::Ptr &context) const;
/**
* @returns the number of captures, also called parenthesized sub-expressions, the pattern has.
*
* If the pattern isn't precompiled, -1 is returned.
*/
inline int captureCount() const;
protected:
/**
* @short This constructor is protected, because this class is supposed to be sub-classed.
*
* @param flagsPosition an index position specifying the operand containing the pattern
* flags.
*/
PatternPlatform(const qint8 flagsPosition);
private:
/**
* Enum telling whether the flags, pattern, or both
* have been compiled at compile time.
*/
enum PreCompiledPart
{
NoPart = 0,
PatternPrecompiled = 1,
FlagsPrecompiled = 2,
FlagsAndPattern = PatternPrecompiled | FlagsPrecompiled
};
typedef QFlags<PreCompiledPart> PreCompiledParts;
Q_DISABLE_COPY(PatternPlatform)
Flags parseFlags(const QString &flags,
const DynamicContext::Ptr &context) const;
QRegExp parsePattern(const QString &pattern,
const DynamicContext::Ptr &context) const;
static void applyFlags(const Flags flags, QRegExp &pattern);
/**
* The parts that have been pre-compiled at compile time.
*/
PreCompiledParts m_compiledParts;
Flags m_flags;
QRegExp m_pattern;
const qint8 m_flagsPosition;
};
inline int PatternPlatform::captureCount() const
{
if(m_compiledParts.testFlag(PatternPrecompiled))
return m_pattern.numCaptures();
else
return -1;
}
Q_DECLARE_OPERATORS_FOR_FLAGS(PatternPlatform::Flags)
}
QT_END_NAMESPACE
QT_END_HEADER
#endif
|
