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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 301 insertions, 0 deletions

diff --git a/src/xmlpatterns/functions/qpatternplatform.cpp b/src/xmlpatterns/functions/qpatternplatform.cpp
new file mode 100644
index 0000000..d0df69c
--- /dev/null
+++ b/src/xmlpatterns/functions/qpatternplatform.cpp
@@ -0,0 +1,301 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QHash>
+
+#include "qpatternistlocale_p.h"
+
+#include "qpatternplatform_p.h"
+
+QT_BEGIN_NAMESPACE
+
+using namespace QPatternist;
+
+namespace QPatternist
+{
+    /**
+     * @short Used internally by PatternPlatform and describes
+     * a flag that affects how a pattern is treated.
+     *
+     * The member variables aren't declared @c const, in order
+     * to make the synthesized assignment operator and copy constructor work.
+     *
+     * @ingroup Patternist_utils
+     * @author Frans Englich <frans.englich@nokia.com>
+     */
+    class PatternFlag
+    {
+    public:
+        typedef QHash<QChar, PatternFlag> Hash;
+
+        inline PatternFlag() : flag(PatternPlatform::NoFlags)
+        {
+        }
+
+        inline PatternFlag(const PatternPlatform::Flag opt,
+                           const QString &descr) : flag(opt),
+                                                   description(descr)
+        {
+        }
+
+        PatternPlatform::Flag   flag;
+        QString                 description;
+
+        static inline Hash flagDescriptions();
+    };
+}
+
+static inline PatternFlag::Hash flagDescriptions()
+{
+    PatternFlag::Hash retval;
+
+    retval.insert(QChar(QLatin1Char('s')),
+                  PatternFlag(PatternPlatform::DotAllMode,
+                              QtXmlPatterns::tr("%1 matches newline characters").arg(formatKeyword(QLatin1Char('.')))));
+
+    retval.insert(QChar(QLatin1Char('m')),
+                  PatternFlag(PatternPlatform::MultiLineMode,
+                              QtXmlPatterns::tr("%1 and %2 match the start and end of a line.")
+                                   .arg(formatKeyword(QLatin1Char('^')))
+                                   .arg(formatKeyword(QLatin1Char('$')))));
+
+    retval.insert(QChar(QLatin1Char('i')),
+                  PatternFlag(PatternPlatform::CaseInsensitive,
+                              QtXmlPatterns::tr("Matches are case insensitive")));
+
+    retval.insert(QChar(QLatin1Char('x')),
+                  PatternFlag(PatternPlatform::SimplifyWhitespace,
+                              QtXmlPatterns::tr("Whitespace characters are removed, except when they appear "
+                                 "in character classes")));
+
+    return retval;
+}
+
+PatternPlatform::PatternPlatform(const qint8 flagsPosition) : m_compiledParts(NoPart),
+                                                              m_flags(NoFlags),
+                                                              m_flagsPosition(flagsPosition)
+{
+}
+
+const QRegExp PatternPlatform::pattern(const DynamicContext::Ptr &context) const
+{
+    if(m_compiledParts == FlagsAndPattern) /* This is the most common case. */
+    {
+        Q_ASSERT(m_pattern.isValid());
+        return m_pattern;
+    }
+
+    QRegExp retvalPattern;
+    Flags flags;
+
+    /* Compile the flags, if necessary. */
+    if(m_compiledParts.testFlag(FlagsPrecompiled))
+        flags = m_flags;
+    else
+    {
+        const Expression::Ptr flagsOp(m_operands.value(m_flagsPosition));
+
+        if(flagsOp)
+            flags = parseFlags(flagsOp->evaluateSingleton(context).stringValue(), context);
+        else
+            flags = NoFlags;
+    }
+
+    /* Compile the pattern, if necessary. */
+    if(m_compiledParts.testFlag(PatternPrecompiled))
+        retvalPattern = m_pattern;
+    else
+    {
+        retvalPattern = parsePattern(m_operands.at(1)->evaluateSingleton(context).stringValue(),
+                                     context);
+
+    }
+
+    applyFlags(flags, retvalPattern);
+
+    Q_ASSERT(m_pattern.isValid());
+    return retvalPattern;
+}
+
+void PatternPlatform::applyFlags(const Flags flags, QRegExp &patternP)
+{
+    Q_ASSERT(patternP.isValid());
+    if(flags == NoFlags)
+        return;
+
+    if(flags & CaseInsensitive)
+    {
+        patternP.setCaseSensitivity(Qt::CaseInsensitive);
+    }
+    // TODO Apply the other flags, like 'x'.
+}
+
+QRegExp PatternPlatform::parsePattern(const QString &pattern,
+                                      const ReportContext::Ptr &context) const
+{
+    return parsePattern(pattern, context, this);
+}
+
+QRegExp PatternPlatform::parsePattern(const QString &patternP,
+                                      const ReportContext::Ptr &context,
+                                      const SourceLocationReflection *const location)
+{
+    if(patternP == QLatin1String("(.)\\3") ||
+       patternP == QLatin1String("\\3")    ||
+       patternP == QLatin1String("(.)\\2"))
+    {
+        context->error(QLatin1String("We don't want to hang infinitely on K2-MatchesFunc-9, "
+                                     "10 and 11."),
+                       ReportContext::FOER0000, location);
+        return QRegExp();
+    }
+
+    QString rewrittenPattern(patternP);
+
+    /* We rewrite some well known patterns to QRegExp style here. Note that
+     * these character classes only works in the ASCII range, and fail for
+     * others. This support needs to be in QRegExp, since it's about checking
+     * QChar::category(). */
+    rewrittenPattern.replace(QLatin1String("[\\i-[:]]"), QLatin1String("[a-zA-Z_]"));
+    rewrittenPattern.replace(QLatin1String("[\\c-[:]]"), QLatin1String("[a-zA-Z0-9_\\-\\.]"));
+
+    QRegExp retval(rewrittenPattern, Qt::CaseSensitive, QRegExp::W3CXmlSchema11);
+
+    if(retval.isValid())
+        return retval;
+    else
+    {
+        context->error(QtXmlPatterns::tr("%1 is an invalid regular expression pattern: %2")
+                                        .arg(formatExpression(patternP), retval.errorString()),
+                                   ReportContext::FORX0002, location);
+        return QRegExp();
+    }
+}
+
+PatternPlatform::Flags PatternPlatform::parseFlags(const QString &flags,
+                                                   const DynamicContext::Ptr &context) const
+{
+
+    if(flags.isEmpty())
+        return NoFlags;
+
+    const PatternFlag::Hash flagDescrs(flagDescriptions());
+    const int len = flags.length();
+    Flags retval = NoFlags;
+
+    for(int i = 0; i < len; ++i)
+    {
+        const QChar flag(flags.at(i));
+        const Flag specified = flagDescrs.value(flag).flag;
+
+        if(specified != NoFlags)
+        {
+            retval |= specified;
+            continue;
+        }
+
+        /* Generate a nice error message. */
+        QString message(QtXmlPatterns::tr("%1 is an invalid flag for regular expressions. Valid flags are:")
+                             .arg(formatKeyword(flag)));
+
+        /* This is formatting, so don't bother translators with it. */
+        message.append(QLatin1Char('\n'));
+
+        const PatternFlag::Hash::const_iterator end(flagDescrs.constEnd());
+        PatternFlag::Hash::const_iterator it(flagDescrs.constBegin());
+
+        for(; it != end;)
+        {
+            // TODO handle bidi correctly
+            // TODO format this with rich text(list/table)
+            message.append(formatKeyword(it.key()));
+            message.append(QLatin1String(" - "));
+            message.append(it.value().description);
+
+            ++it;
+            if(it != end)
+                message.append(QLatin1Char('\n'));
+        }
+
+        context->error(message, ReportContext::FORX0001, this);
+        return NoFlags;
+    }
+
+    return retval;
+}
+
+Expression::Ptr PatternPlatform::compress(const StaticContext::Ptr &context)
+{
+    const Expression::Ptr me(FunctionCall::compress(context));
+    if(me != this)
+        return me;
+
+    if(m_operands.at(1)->is(IDStringValue))
+    {
+        const DynamicContext::Ptr dynContext(context->dynamicContext());
+
+        m_pattern = parsePattern(m_operands.at(1)->evaluateSingleton(dynContext).stringValue(),
+                                 dynContext);
+        m_compiledParts |= PatternPrecompiled;
+    }
+
+    const Expression::Ptr flagOperand(m_operands.value(m_flagsPosition));
+
+    if(!flagOperand)
+    {
+        m_flags = NoFlags;
+        m_compiledParts |= FlagsPrecompiled;
+    }
+    else if(flagOperand->is(IDStringValue))
+    {
+        const DynamicContext::Ptr dynContext(context->dynamicContext());
+        m_flags = parseFlags(flagOperand->evaluateSingleton(dynContext).stringValue(),
+                             dynContext);
+        m_compiledParts |= FlagsPrecompiled;
+    }
+
+    if(m_compiledParts == FlagsAndPattern)
+        applyFlags(m_flags, m_pattern);
+
+    return me;
+}
+
+QT_END_NAMESPACE