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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 QXMLSERIALIZER_P_H |
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53 #define QXMLSERIALIZER_P_H |
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54 |
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55 #include <QtCore/QIODevice> |
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56 #include <QtCore/QStack> |
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57 #include <QtCore/QTextCodec> |
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58 #include <QtXmlPatterns/QXmlQuery> |
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59 #include <QtXmlPatterns/QXmlNamePool> |
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60 #include <QtXmlPatterns/QXmlSerializer> |
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61 |
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62 #include "qnamepool_p.h" |
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63 #include "qabstractxmlreceiver_p.h" |
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64 |
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65 QT_BEGIN_HEADER |
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66 |
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67 QT_BEGIN_NAMESPACE |
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68 |
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69 class QXmlSerializerPrivate : public QAbstractXmlReceiverPrivate |
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70 { |
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71 public: |
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72 QXmlSerializerPrivate(const QXmlQuery &q, |
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73 QIODevice *outputDevice); |
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74 |
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75 QStack<QPair<QXmlName, bool> > hasClosedElement; |
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76 bool isPreviousAtomic; |
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77 QXmlSerializer::State state; |
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78 const QPatternist::NamePool::Ptr np; |
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79 |
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80 /** |
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81 * This member worries me a bit. We never use it but nevertheless |
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82 * it is pushed and pops linear to startElement() and endElement(). |
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83 * An optimization would be to at least merge it with hasClosedElement, |
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84 * but even better to push it on demand. That is, namespaceBinding() |
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85 * pushes it up to the tree depth first when it is needed. |
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86 */ |
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87 QStack<QVector<QXmlName> > namespaces; |
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88 |
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89 QIODevice * device; |
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90 const QTextCodec * codec; |
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91 QTextCodec::ConverterState converterState; |
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92 /** |
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93 * Name cache. Since encoding QStrings are rather expensive |
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94 * operations to do, and we on top of that would have to do |
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95 * it each time a name appears, we here map names to their |
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96 * encoded equivalents. |
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97 * |
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98 * This means that when writing out large documents, the serialization |
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99 * of names after a while is reduced to a hash lookup and passing an |
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100 * existing byte array. |
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101 * |
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102 * We use QXmlName::Code as key as opposed to merely QName, because the |
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103 * prefix is of significance. |
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104 */ |
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105 QHash<QXmlName::Code, QByteArray> nameCache; |
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106 const QXmlQuery query; |
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107 |
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108 inline void write(const char c); |
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109 |
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110 private: |
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111 enum Constants |
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112 { |
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113 EstimatedTreeDepth = 10, |
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114 |
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115 /** |
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116 * We use a high count to avoid rehashing. We can afford it since we |
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117 * only allocate one hash for this. |
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118 */ |
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119 EstimatedNameCount = 60 |
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120 }; |
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121 }; |
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122 |
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123 void QXmlSerializerPrivate::write(const char c) |
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124 { |
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125 device->putChar(c); |
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126 } |
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127 QT_END_NAMESPACE |
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128 QT_END_HEADER |
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129 |
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130 #endif |