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Diffstat (limited to 'src/declarative/qml/qdeclarativedata_p.h')
| -rw-r--r-- | src/declarative/qml/qdeclarativedata_p.h | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/src/declarative/qml/qdeclarativedata_p.h b/src/declarative/qml/qdeclarativedata_p.h new file mode 100644 index 0000000000..33458dc2f4 --- /dev/null +++ b/src/declarative/qml/qdeclarativedata_p.h @@ -0,0 +1,191 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtDeclarative module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QDECLARATIVEDATA_P_H +#define QDECLARATIVEDATA_P_H + +// +// W A R N I N G +// ------------- +// +// This file is not part of the Qt API. It exists purely as an +// implementation detail. This header file may change from version to +// version without notice, or even be removed. +// +// We mean it. +// + +#include <QtScript/qscriptvalue.h> +#include <private/qobject_p.h> +#include "private/qdeclarativeguard_p.h" + +QT_BEGIN_NAMESPACE + +class QDeclarativeCompiledData; +class QDeclarativeAbstractBinding; +class QDeclarativeContext; +class QDeclarativePropertyCache; +class QDeclarativeContextData; +class QDeclarativeNotifier; +class QDeclarativeDataExtended; +// This class is structured in such a way, that simply zero'ing it is the +// default state for elemental object allocations. This is crucial in the +// workings of the QDeclarativeInstruction::CreateSimpleObject instruction. +// Don't change anything here without first considering that case! +class Q_AUTOTEST_EXPORT QDeclarativeData : public QAbstractDeclarativeData +{ +public: + QDeclarativeData() + : ownMemory(true), ownContext(false), indestructible(true), explicitIndestructibleSet(false), + context(0), outerContext(0), bindings(0), nextContextObject(0), prevContextObject(0), bindingBitsSize(0), + bindingBits(0), lineNumber(0), columnNumber(0), deferredComponent(0), deferredIdx(0), + scriptValue(0), objectDataRefCount(0), propertyCache(0), guards(0), extendedData(0) { + init(); + } + + static inline void init() { + QAbstractDeclarativeData::destroyed = destroyed; + QAbstractDeclarativeData::parentChanged = parentChanged; + QAbstractDeclarativeData::objectNameChanged = objectNameChanged; + } + + static void destroyed(QAbstractDeclarativeData *, QObject *); + static void parentChanged(QAbstractDeclarativeData *, QObject *, QObject *); + static void objectNameChanged(QAbstractDeclarativeData *, QObject *); + + void destroyed(QObject *); + void parentChanged(QObject *, QObject *); + void objectNameChanged(QObject *); + + void setImplicitDestructible() { + if (!explicitIndestructibleSet) indestructible = false; + } + + quint32 ownMemory:1; + quint32 ownContext:1; + quint32 indestructible:1; + quint32 explicitIndestructibleSet:1; + quint32 dummy:28; + + // The context that created the C++ object + QDeclarativeContextData *context; + // The outermost context in which this object lives + QDeclarativeContextData *outerContext; + + QDeclarativeAbstractBinding *bindings; + + // Linked list for QDeclarativeContext::contextObjects + QDeclarativeData *nextContextObject; + QDeclarativeData**prevContextObject; + + int bindingBitsSize; + quint32 *bindingBits; + bool hasBindingBit(int) const; + void clearBindingBit(int); + void setBindingBit(QObject *obj, int); + + ushort lineNumber; + ushort columnNumber; + + QDeclarativeCompiledData *deferredComponent; // Can't this be found from the context? + unsigned int deferredIdx; + + // ### Can we make this QScriptValuePrivate so we incur no additional allocation + // cost? + QScriptValue *scriptValue; + quint32 objectDataRefCount; + QDeclarativePropertyCache *propertyCache; + + QDeclarativeGuard<QObject> *guards; + + static QDeclarativeData *get(const QObject *object, bool create = false) { + QObjectPrivate *priv = QObjectPrivate::get(const_cast<QObject *>(object)); + if (priv->wasDeleted) { + Q_ASSERT(!create); + return 0; + } else if (priv->declarativeData) { + return static_cast<QDeclarativeData *>(priv->declarativeData); + } else if (create) { + priv->declarativeData = new QDeclarativeData; + return static_cast<QDeclarativeData *>(priv->declarativeData); + } else { + return 0; + } + } + + bool hasExtendedData() const { return extendedData != 0; } + QDeclarativeNotifier *objectNameNotifier() const; + QHash<int, QObject *> *attachedProperties() const; + +private: + // For objectNameNotifier and attachedProperties + mutable QDeclarativeDataExtended *extendedData; +}; + +template<class T> +void QDeclarativeGuard<T>::addGuard() +{ + Q_ASSERT(!prev); + + if (QObjectPrivate::get(o)->wasDeleted) + return; + + QDeclarativeData *data = QDeclarativeData::get(o, true); + next = data->guards; + if (next) reinterpret_cast<QDeclarativeGuard<T> *>(next)->prev = &next; + data->guards = reinterpret_cast<QDeclarativeGuard<QObject> *>(this); + prev = &data->guards; +} + +template<class T> +void QDeclarativeGuard<T>::remGuard() +{ + Q_ASSERT(prev); + + if (next) reinterpret_cast<QDeclarativeGuard<T> *>(next)->prev = prev; + *prev = next; + next = 0; + prev = 0; +} + +QT_END_NAMESPACE + +#endif // QDECLARATIVEDATA_P_H |