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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the QtXmlPatterns module of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #include "qcommonsequencetypes_p.h" |
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43 #include "qatomicstring_p.h" |
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44 |
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45 #include "qsimplecontentconstructor_p.h" |
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46 |
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47 QT_BEGIN_NAMESPACE |
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48 |
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49 using namespace QPatternist; |
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50 |
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51 SimpleContentConstructor::SimpleContentConstructor(const Expression::Ptr &operand) : SingleContainer(operand) |
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52 { |
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53 } |
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54 |
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55 Item SimpleContentConstructor::evaluateSingleton(const DynamicContext::Ptr &context) const |
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56 { |
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57 const Item::Iterator::Ptr it(m_operand->evaluateSequence(context)); |
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58 Item next(it->next()); |
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59 QString result; |
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60 |
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61 if(next) |
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62 { |
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63 result = next.stringValue(); |
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64 next = it->next(); |
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65 } |
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66 else |
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67 return Item(); |
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68 |
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69 while(next) |
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70 { |
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71 result += QLatin1Char(' '); |
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72 result += next.stringValue(); |
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73 next = it->next(); |
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74 } |
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75 |
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76 return AtomicString::fromValue(result); |
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77 } |
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78 |
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79 Expression::Ptr SimpleContentConstructor::compress(const StaticContext::Ptr &context) |
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80 { |
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81 const Expression::Ptr me(SingleContainer::compress(context)); |
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82 |
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83 if(me.data() == this) |
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84 { |
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85 /* Optimization: if we will evaluate to a single string, we're not |
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86 * necessary. */ |
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87 if(CommonSequenceTypes::ExactlyOneString->matches(m_operand->staticType())) |
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88 return m_operand; |
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89 } |
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90 |
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91 return me; |
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92 } |
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93 |
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94 SequenceType::List SimpleContentConstructor::expectedOperandTypes() const |
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95 { |
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96 SequenceType::List result; |
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97 result.append(CommonSequenceTypes::ZeroOrMoreAtomicTypes); |
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98 return result; |
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99 } |
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100 |
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101 SequenceType::Ptr SimpleContentConstructor::staticType() const |
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102 { |
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103 if(m_operand->staticType()->cardinality().allowsEmpty()) |
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104 return CommonSequenceTypes::ZeroOrOneString; |
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105 else |
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106 return CommonSequenceTypes::ExactlyOneString; |
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107 } |
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108 |
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109 ExpressionVisitorResult::Ptr SimpleContentConstructor::accept(const ExpressionVisitor::Ptr &visitor) const |
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110 { |
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111 return visitor->visit(this); |
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112 } |
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113 |
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114 QT_END_NAMESPACE |