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     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the QtXmlPatterns module of the Qt Toolkit.

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    16 ** GNU Lesser General Public License Usage

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    38 ** $QT_END_LICENSE$

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    40 ****************************************************************************/

    41 

    42 #include "qatomicstring_p.h"

    43 #include "qcommonsequencetypes_p.h"

    44 

    45 #include "qxsltsimplecontentconstructor_p.h"

    46 

    47 QT_BEGIN_NAMESPACE

    48 

    49 using namespace QPatternist;

    50 

    51 XSLTSimpleContentConstructor::XSLTSimpleContentConstructor(const Expression::Ptr &source) : SimpleContentConstructor(source)

    52 {

    53 }

    54 

    55 QString XSLTSimpleContentConstructor::processItem(const Item &item,

    56                                                   bool &discard,

    57                                                   bool &isText)

    58 {

    59     if(item.isNode())

    60     {

    61         isText = (item.asNode().kind() == QXmlNodeModelIndex::Text);

    62 

    63         if(isText)

    64         {

    65             const QString value(item.stringValue());

    66 

    67             /* "1. Zero-length text nodes in the sequence are discarded." */

    68             discard = value.isEmpty();

    69             return value;

    70         }

    71         else

    72         {

    73             Item::Iterator::Ptr it(item.sequencedTypedValue()); /* Atomic values. */

    74             Item next(it->next());

    75             QString result;

    76 

    77             if(next)

    78                 result = next.stringValue();

    79 

    80             next = it->next();

    81 

    82             while(next)

    83             {

    84                 result += next.stringValue();

    85                 result += QLatin1Char(' ');

    86                 next = it->next();

    87             }

    88 

    89             return result;

    90         }

    91     }

    92     else

    93     {

    94         discard = false;

    95         isText = false;

    96         return item.stringValue();

    97     }

    98 }

    99 

   100 Item XSLTSimpleContentConstructor::evaluateSingleton(const DynamicContext::Ptr &context) const

   101 {

   102     const Item::Iterator::Ptr it(m_operand->evaluateSequence(context));

   103 

   104     Item next(it->next());

   105     QString result;

   106 

   107     bool previousIsText = false;

   108     bool discard = false;

   109 

   110     if(next)

   111     {

   112         const QString unit(processItem(next, discard, previousIsText));

   113 

   114         if(!discard)

   115             result = unit;

   116 

   117         next = it->next();

   118     }

   119     else

   120         return Item();

   121 

   122     while(next)

   123     {

   124         bool currentIsText = false;

   125         const QString unit(processItem(next, discard, currentIsText));

   126 

   127         if(!discard)

   128         {

   129             /* "Adjacent text nodes in the sequence are merged into a single text

   130              * node." */

   131             if(previousIsText && currentIsText)

   132                 ;

   133             else

   134                 result += QLatin1Char(' ');

   135 

   136             result += unit;

   137         }

   138 

   139         next = it->next();

   140         previousIsText = currentIsText;

   141     }

   142 

   143     return AtomicString::fromValue(result);

   144 }

   145 

   146 SequenceType::List XSLTSimpleContentConstructor::expectedOperandTypes() const

   147 {

   148     SequenceType::List result;

   149     result.append(CommonSequenceTypes::ZeroOrMoreItems);

   150     return result;

   151 }

   152 

   153 SequenceType::Ptr XSLTSimpleContentConstructor::staticType() const

   154 {

   155     return CommonSequenceTypes::ZeroOrOneString;

   156 }

   157 

   158 QT_END_NAMESPACE