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Diffstat (limited to 'src/xmlpatterns/functions/qpatternplatform_p.h')
| -rw-r--r-- | src/xmlpatterns/functions/qpatternplatform_p.h | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/src/xmlpatterns/functions/qpatternplatform_p.h b/src/xmlpatterns/functions/qpatternplatform_p.h new file mode 100644 index 0000000000..ce0dbd497d --- /dev/null +++ b/src/xmlpatterns/functions/qpatternplatform_p.h @@ -0,0 +1,183 @@ +/**************************************************************************** +** +** 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 |