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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 "qbuiltintypes_p.h" |
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43 #include "qcommonsequencetypes_p.h" |
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44 #include "qgenericsequencetype_p.h" |
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45 |
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46 #include "qcontextitem_p.h" |
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47 |
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48 QT_BEGIN_NAMESPACE |
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49 |
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50 using namespace QPatternist; |
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51 |
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52 Item ContextItem::evaluateSingleton(const DynamicContext::Ptr &context) const |
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53 { |
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54 return context->contextItem(); |
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55 } |
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56 |
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57 Expression::Ptr ContextItem::compress(const StaticContext::Ptr &context) |
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58 { |
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59 m_itemType = context->contextItemType(); |
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60 return EmptyContainer::compress(context); |
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61 } |
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62 |
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63 Expression::Ptr ContextItem::typeCheck(const StaticContext::Ptr &context, |
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64 const SequenceType::Ptr &reqType) |
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65 { |
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66 m_itemType = context->contextItemType(); |
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67 return EmptyContainer::typeCheck(context, reqType); |
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68 } |
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69 |
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70 SequenceType::Ptr ContextItem::staticType() const |
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71 { |
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72 /* We test m_itemType here because Patternist View calls staticType() before the typeCheck() |
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73 * stage. */ |
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74 if(m_itemType) |
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75 return makeGenericSequenceType(m_itemType, Cardinality::exactlyOne()); |
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76 else |
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77 return CommonSequenceTypes::ExactlyOneItem; |
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78 } |
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79 |
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80 Expression::Properties ContextItem::properties() const |
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81 { |
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82 return DisableElimination | RequiresContextItem | EvaluationCacheRedundant; |
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83 } |
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84 |
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85 ExpressionVisitorResult::Ptr ContextItem::accept(const ExpressionVisitor::Ptr &visitor) const |
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86 { |
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87 return visitor->visit(this); |
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88 } |
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89 |
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90 Expression::ID ContextItem::id() const |
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91 { |
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92 return IDContextItem; |
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93 } |
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94 |
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95 ItemType::Ptr ContextItem::expectedContextItemType() const |
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96 { |
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97 return BuiltinTypes::item; |
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98 } |
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99 |
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100 const SourceLocationReflection *ContextItem::actualReflection() const |
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101 { |
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102 if(m_expr) |
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103 return m_expr.data(); |
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104 else |
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105 return this; |
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106 } |
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107 |
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108 void ContextItem::announceFocusType(const ItemType::Ptr &type) |
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109 { |
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110 Q_ASSERT(type); |
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111 m_itemType = type; |
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112 } |
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113 |
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114 QT_END_NAMESPACE |