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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 // |
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43 // W A R N I N G |
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44 // ------------- |
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45 // |
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46 // This file is not part of the Qt API. It exists purely as an |
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47 // implementation detail. This header file may change from version to |
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48 // version without notice, or even be removed. |
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49 // |
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50 // We mean it. |
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51 |
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52 #ifndef Patternist_CurrentItemContext_H |
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53 #define Patternist_CurrentItemContext_H |
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54 |
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55 #include "qdelegatingdynamiccontext_p.h" |
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56 |
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57 QT_BEGIN_HEADER |
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58 |
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59 QT_BEGIN_NAMESPACE |
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60 |
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61 namespace QPatternist |
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62 { |
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63 /** |
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64 * @short A DynamicContext that maintains the focus, a sequence |
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65 * of items. |
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66 * |
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67 * CurrentItemContext implements both the outer and inner focus. The focus is one of |
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68 * the things that characterizes the XPath language. The focus is what's |
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69 * iterated over in a predicate, whose current item can be received |
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70 * via the context item expression, <tt>.</tt>(the dot), |
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71 * and whose size is retrievable via the function <tt>fn:last()</tt>. |
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72 * |
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73 * @since 4.5 |
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74 * @author Frans Englich <frans.englich@nokia.com> |
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75 */ |
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76 class CurrentItemContext : public DelegatingDynamicContext |
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77 { |
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78 public: |
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79 CurrentItemContext(const Item &item, |
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80 const DynamicContext::Ptr &prevContext); |
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81 |
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82 virtual Item currentItem() const; |
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83 |
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84 private: |
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85 const Item m_currentItem; |
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86 }; |
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87 } |
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88 |
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89 QT_END_NAMESPACE |
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90 |
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91 QT_END_HEADER |
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92 |
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93 #endif |