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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2010 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 QtDeclarative 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 #ifndef QDECLARATIVEDATA_P_H |
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43 #define QDECLARATIVEDATA_P_H |
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44 |
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45 // |
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46 // W A R N I N G |
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47 // ------------- |
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48 // |
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49 // This file is not part of the Qt API. It exists purely as an |
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50 // implementation detail. This header file may change from version to |
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51 // version without notice, or even be removed. |
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52 // |
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53 // We mean it. |
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54 // |
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55 |
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56 #include <QtScript/qscriptvalue.h> |
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57 #include <private/qobject_p.h> |
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58 #include "private/qdeclarativeguard_p.h" |
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59 |
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60 QT_BEGIN_NAMESPACE |
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61 |
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62 class QDeclarativeCompiledData; |
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63 class QDeclarativeAbstractBinding; |
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64 class QDeclarativeContext; |
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65 class QDeclarativePropertyCache; |
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66 class QDeclarativeContextData; |
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67 // This class is structured in such a way, that simply zero'ing it is the |
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68 // default state for elemental object allocations. This is crucial in the |
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69 // workings of the QDeclarativeInstruction::CreateSimpleObject instruction. |
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70 // Don't change anything here without first considering that case! |
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71 class Q_AUTOTEST_EXPORT QDeclarativeData : public QAbstractDeclarativeData |
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72 { |
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73 public: |
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74 QDeclarativeData() |
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75 : ownMemory(true), ownContext(false), indestructible(true), explicitIndestructibleSet(false), |
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76 context(0), outerContext(0), bindings(0), nextContextObject(0), prevContextObject(0), bindingBitsSize(0), |
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77 bindingBits(0), lineNumber(0), columnNumber(0), deferredComponent(0), deferredIdx(0), |
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78 attachedProperties(0), scriptValue(0), objectDataRefCount(0), propertyCache(0), guards(0) { |
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79 init(); |
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80 } |
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81 |
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82 static inline void init() { |
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83 QAbstractDeclarativeData::destroyed = destroyed; |
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84 QAbstractDeclarativeData::parentChanged = parentChanged; |
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85 } |
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86 |
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87 static void destroyed(QAbstractDeclarativeData *, QObject *); |
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88 static void parentChanged(QAbstractDeclarativeData *, QObject *, QObject *); |
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89 |
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90 void destroyed(QObject *); |
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91 void parentChanged(QObject *, QObject *); |
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92 |
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93 void setImplicitDestructible() { |
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94 if (!explicitIndestructibleSet) indestructible = false; |
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95 } |
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96 |
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97 quint32 ownMemory:1; |
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98 quint32 ownContext:1; |
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99 quint32 indestructible:1; |
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100 quint32 explicitIndestructibleSet:1; |
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101 quint32 dummy:28; |
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102 |
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103 // The context that created the C++ object |
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104 QDeclarativeContextData *context; |
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105 // The outermost context in which this object lives |
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106 QDeclarativeContextData *outerContext; |
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107 |
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108 QDeclarativeAbstractBinding *bindings; |
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109 |
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110 // Linked list for QDeclarativeContext::contextObjects |
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111 QDeclarativeData *nextContextObject; |
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112 QDeclarativeData**prevContextObject; |
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113 |
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114 int bindingBitsSize; |
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115 quint32 *bindingBits; |
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116 bool hasBindingBit(int) const; |
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117 void clearBindingBit(int); |
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118 void setBindingBit(QObject *obj, int); |
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119 |
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120 ushort lineNumber; |
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121 ushort columnNumber; |
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122 |
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123 QDeclarativeCompiledData *deferredComponent; // Can't this be found from the context? |
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124 unsigned int deferredIdx; |
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125 |
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126 QHash<int, QObject *> *attachedProperties; |
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127 |
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128 // ### Can we make this QScriptValuePrivate so we incur no additional allocation |
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129 // cost? |
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130 QScriptValue *scriptValue; |
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131 quint32 objectDataRefCount; |
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132 QDeclarativePropertyCache *propertyCache; |
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133 |
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134 QDeclarativeGuard<QObject> *guards; |
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135 |
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136 static QDeclarativeData *get(const QObject *object, bool create = false) { |
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137 QObjectPrivate *priv = QObjectPrivate::get(const_cast<QObject *>(object)); |
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138 if (priv->wasDeleted) { |
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139 Q_ASSERT(!create); |
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140 return 0; |
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141 } else if (priv->declarativeData) { |
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142 return static_cast<QDeclarativeData *>(priv->declarativeData); |
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143 } else if (create) { |
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144 priv->declarativeData = new QDeclarativeData; |
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145 return static_cast<QDeclarativeData *>(priv->declarativeData); |
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146 } else { |
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147 return 0; |
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148 } |
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149 } |
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150 }; |
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151 |
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152 template<class T> |
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153 void QDeclarativeGuard<T>::addGuard() |
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154 { |
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155 Q_ASSERT(!prev); |
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156 |
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157 if (QObjectPrivate::get(o)->wasDeleted) |
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158 return; |
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159 |
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160 QDeclarativeData *data = QDeclarativeData::get(o, true); |
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161 next = data->guards; |
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162 if (next) reinterpret_cast<QDeclarativeGuard<T> *>(next)->prev = &next; |
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163 data->guards = reinterpret_cast<QDeclarativeGuard<QObject> *>(this); |
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164 prev = &data->guards; |
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165 } |
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166 |
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167 template<class T> |
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168 void QDeclarativeGuard<T>::remGuard() |
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169 { |
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170 Q_ASSERT(prev); |
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171 |
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172 if (next) reinterpret_cast<QDeclarativeGuard<T> *>(next)->prev = prev; |
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173 *prev = next; |
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174 next = 0; |
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175 prev = 0; |
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176 } |
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177 |
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178 QT_END_NAMESPACE |
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179 |
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180 #endif // QDECLARATIVEDATA_P_H |