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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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     9 ** $QT_BEGIN_LICENSE:LGPL$

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    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

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    38 ** $QT_END_LICENSE$

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

    41 

    42 #include "qcommonsequencetypes_p.h"

    43 #include "qpatternistlocale_p.h"

    44 #include "qnodebuilder_p.h"

    45 #include "qqnamevalue_p.h"

    46 

    47 #include "qprocessinginstructionconstructor_p.h"

    48 

    49 QT_BEGIN_NAMESPACE

    50 

    51 using namespace QPatternist;

    52 

    53 ProcessingInstructionConstructor::

    54 ProcessingInstructionConstructor(const Expression::Ptr &op1,

    55                                  const Expression::Ptr &op2) : PairContainer(op1, op2)

    56 {

    57 }

    58 

    59 QString ProcessingInstructionConstructor::leftTrimmed(const QString &input)

    60 {

    61     const int len = input.length();

    62 

    63     for(int i = 0; i < len; ++i)

    64     {

    65         if(!input.at(i).isSpace())

    66             return input.mid(i);

    67     }

    68 

    69     return QString(); /* input consists only of whitespace. All was trimmed. */

    70 }

    71 

    72 QString ProcessingInstructionConstructor::data(const DynamicContext::Ptr &context) const

    73 {

    74     const Item name(m_operand1->evaluateSingleton(context));

    75     const Item dataArg(m_operand2->evaluateSingleton(context));

    76 

    77     if(dataArg)

    78     {

    79         /* Perform trimming before validation, to increase speed. */

    80         const QString value(leftTrimmed(dataArg.stringValue()));

    81 

    82         if(value.contains(QLatin1String("?>")))

    83         {

    84             context->error(QtXmlPatterns::tr("The data of a processing instruction cannot contain the string %1").arg(formatData("?>")),

    85                               ReportContext::XQDY0026, this);

    86             return QString();

    87         }

    88         else

    89             return value;

    90     }

    91     else

    92         return QString();

    93 }

    94 

    95 QXmlName ProcessingInstructionConstructor::evaluateTardata(const DynamicContext::Ptr &context) const

    96 {

    97     const Item name(m_operand1->evaluateSingleton(context));

    98     return context->namePool()->allocateQName(QString(), name.stringValue());

    99 }

   100 

   101 Item ProcessingInstructionConstructor::evaluateSingleton(const DynamicContext::Ptr &context) const

   102 {

   103     const NodeBuilder::Ptr nodeBuilder(context->nodeBuilder(QUrl()));

   104 

   105     nodeBuilder->processingInstruction(evaluateTardata(context), data(context));

   106 

   107     const QAbstractXmlNodeModel::Ptr nm(nodeBuilder->builtDocument());

   108     context->addNodeModel(nm);

   109 

   110     return nm->root(QXmlNodeModelIndex());

   111 }

   112 

   113 void ProcessingInstructionConstructor::evaluateToSequenceReceiver(const DynamicContext::Ptr &context) const

   114 {

   115     QAbstractXmlReceiver *const receiver = context->outputReceiver();

   116 

   117     receiver->processingInstruction(evaluateTardata(context), data(context));

   118 }

   119 

   120 SequenceType::Ptr ProcessingInstructionConstructor::staticType() const

   121 {

   122     return CommonSequenceTypes::ExactlyOneProcessingInstruction;

   123 }

   124 

   125 SequenceType::List ProcessingInstructionConstructor::expectedOperandTypes() const

   126 {

   127     SequenceType::List result;

   128     result.append(CommonSequenceTypes::ExactlyOneString);

   129     result.append(CommonSequenceTypes::ZeroOrOneString);

   130     return result;

   131 }

   132 

   133 Expression::Properties ProcessingInstructionConstructor::properties() const

   134 {

   135     return DisableElimination | IsNodeConstructor;

   136 }

   137 

   138 ExpressionVisitorResult::Ptr

   139 ProcessingInstructionConstructor::accept(const ExpressionVisitor::Ptr &visitor) const

   140 {

   141     return visitor->visit(this);

   142 }

   143 

   144 QT_END_NAMESPACE