Long live Qt 4.5!

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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_StringValueFNs_H
+#define Patternist_StringValueFNs_H
+
+#include <QByteArray>
+
+#include "qfunctioncall_p.h"
+
+/**
+ * @file
+ * @short Contains classes implementing the functions found in
+ * <a href="http://www.w3.org/TR/xpath-functions/#string-value-functions">XQuery 1.0 and
+ * XPath 2.0 Functions and Operators, 7.4 Functions on AtomicString Values</a>.
+ *
+ * @ingroup Patternist_functions
+ */
+
+QT_BEGIN_HEADER
+
+QT_BEGIN_NAMESPACE
+
+namespace QPatternist
+{
+
+    /**
+     * @short Implements the function <tt>fn:concat()</tt>.
+     *
+     * @ingroup Patternist_functions
+     * @author Frans Englich <fenglich@trolltech.com>
+     */
+    class ConcatFN : public FunctionCall
+    {
+    public:
+        virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
+    };
+
+    /**
+     * @short Implements the function <tt>fn:string-join()</tt>.
+     *
+     * @ingroup Patternist_functions
+     * @author Frans Englich <fenglich@trolltech.com>
+     */
+    class StringJoinFN : public FunctionCall
+    {
+    public:
+        virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
+
+        /**
+         * Optimization: when the cardinality of the sequence of items to join
+         * cannot be two or more, we have no effect and therefore rewrite
+         * ourselves to our first operand.
+         */
+        virtual Expression::Ptr compress(const StaticContext::Ptr &context);
+    };
+
+    /**
+     * @short Implements the function <tt>fn:substring()</tt>.
+     *
+     * @ingroup Patternist_functions
+     * @author Frans Englich <fenglich@trolltech.com>
+     */
+    class SubstringFN : public FunctionCall
+    {
+    public:
+        virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
+    };
+
+    /**
+     * @short Implements the function <tt>fn:string-length()</tt>.
+     *
+     * @ingroup Patternist_functions
+     * @author Frans Englich <fenglich@trolltech.com>
+     */
+    class StringLengthFN : public FunctionCall
+    {
+    public:
+        virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
+    };
+
+    /**
+     * @short Implements the function <tt>fn:normalize-space()</tt>.
+     *
+     * @ingroup Patternist_functions
+     * @author Frans Englich <fenglich@trolltech.com>
+     */
+    class NormalizeSpaceFN : public FunctionCall
+    {
+    public:
+        virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
+    };
+
+    /**
+     * @short Implements the function <tt>fn:normalize-unicode()</tt>.
+     *
+     * What perhaps can be said significant with the implementation, is that it
+     * attempts to determine the normalization form at compile time, in order to
+     * reduce string work at runtime.
+     *
+     * @ingroup Patternist_functions
+     * @author Frans Englich <fenglich@trolltech.com>
+     */
+    class NormalizeUnicodeFN : public FunctionCall
+    {
+    public:
+        /**
+         * Initializes private data.
+         */
+        NormalizeUnicodeFN();
+        virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
+        virtual Expression::Ptr compress(const StaticContext::Ptr &context);
+
+    private:
+        int determineNormalizationForm(const DynamicContext::Ptr &context) const;
+        QString::NormalizationForm m_normForm;
+    };
+
+    /**
+     * @short Implements the function <tt>fn:upper-case()</tt>.
+     *
+     * @ingroup Patternist_functions
+     * @author Frans Englich <fenglich@trolltech.com>
+     */
+    class UpperCaseFN : public FunctionCall
+    {
+    public:
+        virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
+    };
+
+    /**
+     * @short Implements the function <tt>fn:lower-case()</tt>.
+     *
+     * @short Implements the function <tt>fn:concat()</tt>.
+     * @ingroup Patternist_functions
+     * @author Frans Englich <fenglich@trolltech.com>
+     */
+    class LowerCaseFN : public FunctionCall
+    {
+    public:
+        virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
+    };
+
+    /**
+     * @short Implements the function <tt>fn:translate()</tt>.
+     *
+     * @ingroup Patternist_functions
+     * @author Frans Englich <fenglich@trolltech.com>
+     */
+    class TranslateFN : public FunctionCall
+    {
+    public:
+        virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
+    };
+
+    /**
+     * @short Provides functionality for encoding strings. Sub-classed by various
+     * function implementations.
+     *
+     * @ingroup Patternist_functions
+     * @author Frans Englich <fenglich@trolltech.com>
+     */
+    class EncodeString : public FunctionCall
+    {
+    public:
+        /**
+         * Evaluates its first operand. If it is the empty sequence, an empty string
+         * is returned. Otherwise, the item's string value is returned percent encoded
+         * as specified in this class's constructor.
+         */
+        virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
+
+    protected:
+        /**
+         * Encodes its operand with QUrl::toPercentEncoding(), with @p includeChars as
+         * the characters to encode, and @p excludeChars as the characters to not encode.
+         */
+        EncodeString(const QByteArray &excludeChars, const QByteArray &includeChars);
+
+    private:
+        const QByteArray m_excludeChars;
+        const QByteArray m_includeChars;
+    };
+
+    /**
+     * @short Implements the function <tt>fn:encode-for-uri()</tt>.
+     *
+     * @ingroup Patternist_functions
+     * @author Frans Englich <fenglich@trolltech.com>
+     */
+    class EncodeForURIFN : public EncodeString
+    {
+    public:
+        /**
+         * Performs internal initialization.
+         */
+        EncodeForURIFN();
+
+    private:
+        static const char *const include;
+    };
+
+    /**
+     * @short Implements the function <tt>fn:iri-to-uri()</tt>.
+     *
+     * @ingroup Patternist_functions
+     * @author Frans Englich <fenglich@trolltech.com>
+     */
+    class IriToURIFN : public EncodeString
+    {
+    public:
+        /**
+         * Performs internal initialization.
+         */
+        IriToURIFN();
+
+    private:
+        static const char *const exclude;
+    };
+
+    /**
+     * @short Implements the function <tt>fn:escape-html-uri()</tt>.
+     *
+     * @ingroup Patternist_functions
+     * @author Frans Englich <fenglich@trolltech.com>
+     */
+    class EscapeHtmlURIFN : public EncodeString
+    {
+    public:
+        /**
+         * Performs internal initialization.
+         */
+        EscapeHtmlURIFN();
+
+    private:
+        static const char *const include;
+        static const char *const exclude;
+    };
+}
+
+QT_END_NAMESPACE
+
+QT_END_HEADER
+
+#endif