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5 ** Contact: Nokia Corporation (qt-info@nokia.com)
7 ** This file is part of the QtDeclarative module of the Qt Toolkit.
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14 ** file. Please review the following information to ensure the GNU Lesser
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22 ** GNU General Public License Usage
23 ** Alternatively, this file may be used under the terms of the GNU General
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40 ****************************************************************************/
42 #ifndef QDECLARATIVEDATA_P_H
43 #define QDECLARATIVEDATA_P_H
49 // This file is not part of the Qt API. It exists purely as an
50 // implementation detail. This header file may change from version to
51 // version without notice, or even be removed.
56 #include <QtScript/qscriptvalue.h>
57 #include <private/qobject_p.h>
58 #include "private/qdeclarativeguard_p.h"
60 #include <private/qv8_p.h>
64 class QDeclarativeCompiledData;
65 class QDeclarativeAbstractBinding;
66 class QDeclarativeContext;
67 class QDeclarativePropertyCache;
68 class QDeclarativeContextData;
69 class QDeclarativeNotifier;
70 class QDeclarativeDataExtended;
71 // This class is structured in such a way, that simply zero'ing it is the
72 // default state for elemental object allocations. This is crucial in the
73 // workings of the QDeclarativeInstruction::CreateSimpleObject instruction.
74 // Don't change anything here without first considering that case!
75 class Q_AUTOTEST_EXPORT QDeclarativeData : public QAbstractDeclarativeData
79 : ownMemory(true), ownContext(false), indestructible(true), explicitIndestructibleSet(false),
80 context(0), outerContext(0), bindings(0), nextContextObject(0), prevContextObject(0), bindingBitsSize(0),
81 bindingBits(0), lineNumber(0), columnNumber(0), deferredComponent(0), deferredIdx(0), propertyCache(0),
82 guards(0), extendedData(0) {
86 static inline void init() {
87 QAbstractDeclarativeData::destroyed = destroyed;
88 QAbstractDeclarativeData::parentChanged = parentChanged;
89 QAbstractDeclarativeData::objectNameChanged = objectNameChanged;
92 static void destroyed(QAbstractDeclarativeData *, QObject *);
93 static void parentChanged(QAbstractDeclarativeData *, QObject *, QObject *);
94 static void objectNameChanged(QAbstractDeclarativeData *, QObject *);
96 void destroyed(QObject *);
97 void parentChanged(QObject *, QObject *);
98 void objectNameChanged(QObject *);
100 void setImplicitDestructible() {
101 if (!explicitIndestructibleSet) indestructible = false;
105 quint32 ownContext:1;
106 quint32 indestructible:1;
107 quint32 explicitIndestructibleSet:1;
110 // The context that created the C++ object
111 QDeclarativeContextData *context;
112 // The outermost context in which this object lives
113 QDeclarativeContextData *outerContext;
115 QDeclarativeAbstractBinding *bindings;
117 // Linked list for QDeclarativeContext::contextObjects
118 QDeclarativeData *nextContextObject;
119 QDeclarativeData**prevContextObject;
122 quint32 *bindingBits;
123 bool hasBindingBit(int) const;
124 void clearBindingBit(int);
125 void setBindingBit(QObject *obj, int);
130 QDeclarativeCompiledData *deferredComponent; // Can't this be found from the context?
131 unsigned int deferredIdx;
133 v8::Persistent<v8::Object> v8object;
134 QDeclarativePropertyCache *propertyCache;
136 QDeclarativeGuard<QObject> *guards;
138 static QDeclarativeData *get(const QObject *object, bool create = false) {
139 QObjectPrivate *priv = QObjectPrivate::get(const_cast<QObject *>(object));
140 if (priv->wasDeleted) {
143 } else if (priv->declarativeData) {
144 return static_cast<QDeclarativeData *>(priv->declarativeData);
146 priv->declarativeData = new QDeclarativeData;
147 return static_cast<QDeclarativeData *>(priv->declarativeData);
153 bool hasExtendedData() const { return extendedData != 0; }
154 QDeclarativeNotifier *objectNameNotifier() const;
155 QHash<int, QObject *> *attachedProperties() const;
158 // For objectNameNotifier and attachedProperties
159 mutable QDeclarativeDataExtended *extendedData;
163 void QDeclarativeGuard<T>::addGuard()
167 if (QObjectPrivate::get(o)->wasDeleted)
170 QDeclarativeData *data = QDeclarativeData::get(o, true);
172 if (next) reinterpret_cast<QDeclarativeGuard<T> *>(next)->prev = &next;
173 data->guards = reinterpret_cast<QDeclarativeGuard<QObject> *>(this);
174 prev = &data->guards;
178 void QDeclarativeGuard<T>::remGuard()
182 if (next) reinterpret_cast<QDeclarativeGuard<T> *>(next)->prev = prev;
190 #endif // QDECLARATIVEDATA_P_H