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Diffstat (limited to 'src/declarative/qml/qdeclarativeproperty.cpp')
| -rw-r--r-- | src/declarative/qml/qdeclarativeproperty.cpp | 1184 |
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diff --git a/src/declarative/qml/qdeclarativeproperty.cpp b/src/declarative/qml/qdeclarativeproperty.cpp new file mode 100644 index 0000000..7ead1b5 --- /dev/null +++ b/src/declarative/qml/qdeclarativeproperty.cpp @@ -0,0 +1,1184 @@ +/**************************************************************************** +** +** Copyright (C) 2010 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. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qdeclarativeproperty.h" +#include "qdeclarativeproperty_p.h" + +#include "qdeclarativecompositetypedata_p.h" +#include "qdeclarative.h" +#include "qdeclarativebinding_p.h" +#include "qdeclarativecontext.h" +#include "qdeclarativecontext_p.h" +#include "qdeclarativeboundsignal_p.h" +#include "qdeclarativeengine.h" +#include "qdeclarativeengine_p.h" +#include "qdeclarativedeclarativedata_p.h" +#include "qdeclarativestringconverters_p.h" +#include "qdeclarativelist_p.h" +#include "qdeclarativecompiler_p.h" + +#include <QStringList> +#include <QtCore/qdebug.h> + +#include <math.h> + +QT_BEGIN_NAMESPACE + +/*! + \class QDeclarativeProperty + \brief The QDeclarativeProperty class abstracts accessing QML properties. + \internal + */ + +/*! + Create an invalid QDeclarativeProperty. +*/ +QDeclarativeProperty::QDeclarativeProperty() +: d(new QDeclarativePropertyPrivate) +{ + d->q = this; +} + +/*! \internal */ +QDeclarativeProperty::~QDeclarativeProperty() +{ + delete d; d = 0; +} + +/*! + Creates a QDeclarativeProperty for the default property of \a obj. If there is no + default property, an invalid QDeclarativeProperty will be created. + */ +QDeclarativeProperty::QDeclarativeProperty(QObject *obj) +: d(new QDeclarativePropertyPrivate) +{ + d->q = this; + d->initDefault(obj); +} + +/*! + \internal + Creates a QDeclarativeProperty for the default property of \a obj. If there is no + default property, an invalid QDeclarativeProperty will be created. + */ +QDeclarativeProperty::QDeclarativeProperty(QObject *obj, QDeclarativeContext *ctxt) +: d(new QDeclarativePropertyPrivate) +{ + d->q = this; + d->context = ctxt; + d->initDefault(obj); +} + +/*! + Initialize from the default property of \a obj +*/ +void QDeclarativePropertyPrivate::initDefault(QObject *obj) +{ + if (!obj) + return; + + QMetaProperty p = QDeclarativeMetaType::defaultProperty(obj); + core.load(p); + if (core.isValid()) { + isDefaultProperty = true; + object = obj; + } +} + +/*! + Creates a QDeclarativeProperty for the property \a name of \a obj. + */ +QDeclarativeProperty::QDeclarativeProperty(QObject *obj, const QString &name) +: d(new QDeclarativePropertyPrivate) +{ + d->q = this; + d->initProperty(obj, name); + if (!isValid()) d->object = 0; +} + +/*! + \internal + Creates a QDeclarativeProperty for the property \a name of \a obj. + */ +QDeclarativeProperty::QDeclarativeProperty(QObject *obj, const QString &name, QDeclarativeContext *ctxt) +: d(new QDeclarativePropertyPrivate) +{ + d->q = this; + d->context = ctxt; + d->initProperty(obj, name); + if (!isValid()) { d->object = 0; d->context = 0; } +} + +Q_GLOBAL_STATIC(QDeclarativeValueTypeFactory, qmlValueTypes); + +void QDeclarativePropertyPrivate::initProperty(QObject *obj, const QString &name) +{ + if (!obj) return; + + QDeclarativeEngine *engine = context?context->engine():0; + QDeclarativeTypeNameCache *typeNameCache = context?QDeclarativeContextPrivate::get(context)->imports:0; + + QStringList path = name.split(QLatin1Char('.')); + if (path.isEmpty()) return; + + QObject *currentObject = obj; + + // Everything up to the last property must be an "object type" property + for (int ii = 0; ii < path.count() - 1; ++ii) { + const QString &pathName = path.at(ii); + + if (QDeclarativeTypeNameCache::Data *data = typeNameCache?typeNameCache->data(pathName):0) { + if (data->type) { + QDeclarativeAttachedPropertiesFunc func = data->type->attachedPropertiesFunction(); + if (!func) return; // Not an attachable type + + currentObject = qmlAttachedPropertiesObjectById(data->type->index(), currentObject); + if (!currentObject) return; // Something is broken with the attachable type + } else { + Q_ASSERT(data->typeNamespace); + if ((ii + 1) == path.count()) return; // No type following the namespace + + ++ii; data = data->typeNamespace->data(path.at(ii)); + if (!data || !data->type) return; // Invalid type in namespace + + QDeclarativeAttachedPropertiesFunc func = data->type->attachedPropertiesFunction(); + if (!func) return; // Not an attachable type + + currentObject = qmlAttachedPropertiesObjectById(data->type->index(), currentObject); + if (!currentObject) return; // Something is broken with the attachable type + } + } else { + + QDeclarativePropertyCache::Data local; + QDeclarativePropertyCache::Data *property = + QDeclarativePropertyCache::property(engine, obj, pathName, local); + + if (!property) return; // Not a property + if (property->flags & QDeclarativePropertyCache::Data::IsFunction) + return; // Not an object property + + if (ii == (path.count() - 2) && property->propType < (int)QVariant::UserType) { + // We're now at a value type property. We can use a global valuetypes array as we + // never actually use the objects, just look up their properties. + QObject *typeObject = qmlValueTypes()->valueTypes[property->propType]; + if (!typeObject) return; // Not a value type + + int idx = typeObject->metaObject()->indexOfProperty(path.last().toUtf8().constData()); + if (idx == -1) return; // Value type property does not exist + + QMetaProperty vtProp = typeObject->metaObject()->property(idx); + + object = currentObject; + core = *property; + valueType.flags = QDeclarativePropertyCache::Data::flagsForProperty(vtProp); + valueType.valueTypeCoreIdx = idx; + valueType.valueTypePropType = vtProp.userType(); + + return; + } else { + if (!(property->flags & QDeclarativePropertyCache::Data::IsQObjectDerived)) + return; // Not an object property + + void *args[] = { ¤tObject, 0 }; + QMetaObject::metacall(currentObject, QMetaObject::ReadProperty, property->coreIndex, args); + if (!currentObject) return; // No value + + } + } + + } + + const QString &terminal = path.last(); + + if (terminal.count() >= 3 && + terminal.at(0) == QLatin1Char('o') && + terminal.at(1) == QLatin1Char('n') && + terminal.at(2).isUpper()) { + + QString signalName = terminal.mid(2); + signalName[0] = signalName.at(0).toLower(); + + QMetaMethod method = QDeclarativeCompiler::findSignalByName(currentObject->metaObject(), signalName.toLatin1().constData()); + if (method.signature()) { + object = currentObject; + core.load(method); + return; + } + } + + // Property + QDeclarativePropertyCache::Data local; + QDeclarativePropertyCache::Data *property = + QDeclarativePropertyCache::property(context?context->engine():0, currentObject, terminal, local); + if (property && !(property->flags & QDeclarativePropertyCache::Data::IsFunction)) { + object = currentObject; + core = *property; + } +} + +/*! + Create a copy of \a other. +*/ +QDeclarativeProperty::QDeclarativeProperty(const QDeclarativeProperty &other) +: d(new QDeclarativePropertyPrivate(*other.d)) +{ + d->q = this; +} + +/*! + \enum QDeclarativeProperty::PropertyTypeCategory + + This enum specifies a category of QML property. + + \value InvalidCategory The property is invalid. + \value List The property is a QList pointer + \value Object The property is a QObject derived type pointer + \value Normal The property is none of the above. + */ + +/*! + \enum QDeclarativeProperty::Type + + This enum specifies a type of QML property. + + \value Invalid The property is invalid. + \value Property The property is a regular Qt property. + \value SignalProperty The property is a signal property. + \value Default The property is the default property. +*/ + +/*! + Returns the property category. +*/ +QDeclarativeProperty::PropertyTypeCategory QDeclarativeProperty::propertyTypeCategory() const +{ + return d->propertyTypeCategory(); +} + +QDeclarativeProperty::PropertyTypeCategory +QDeclarativePropertyPrivate::propertyTypeCategory() const +{ + uint type = q->type(); + + if (type & QDeclarativeProperty::ValueTypeProperty) { + return QDeclarativeProperty::Normal; + } else if (type & QDeclarativeProperty::Property) { + int type = propertyType(); + if (type == QVariant::Invalid) + return QDeclarativeProperty::InvalidCategory; + else if ((uint)type < QVariant::UserType) + return QDeclarativeProperty::Normal; + else if (core.flags & QDeclarativePropertyCache::Data::IsQObjectDerived) + return QDeclarativeProperty::Object; + else if (core.flags & QDeclarativePropertyCache::Data::IsQList) + return QDeclarativeProperty::List; + else + return QDeclarativeProperty::Normal; + } else { + return QDeclarativeProperty::InvalidCategory; + } +} + +/*! + Returns the type name of the property, or 0 if the property has no type + name. +*/ +const char *QDeclarativeProperty::propertyTypeName() const +{ + if (type() & ValueTypeProperty) { + + QDeclarativeEnginePrivate *ep = QDeclarativeEnginePrivate::get(d->context); + QDeclarativeValueType *valueType = 0; + if (ep) valueType = ep->valueTypes[d->core.propType]; + else valueType = QDeclarativeValueTypeFactory::valueType(d->core.propType); + Q_ASSERT(valueType); + + const char *rv = valueType->metaObject()->property(d->valueType.valueTypeCoreIdx).typeName(); + + if (!ep) delete valueType; + + return rv; + } else if (d->object && type() & Property && d->core.isValid()) { + return d->object->metaObject()->property(d->core.coreIndex).typeName(); + } else { + return 0; + } +} + +/*! + Returns true if \a other and this QDeclarativeProperty represent the same + property. +*/ +bool QDeclarativeProperty::operator==(const QDeclarativeProperty &other) const +{ + // category is intentially omitted here as it is generated + // from the other members + return d->object == other.d->object && + d->core == other.d->core && + d->valueType == other.d->valueType; +} + +/*! + Returns the QVariant type of the property, or QVariant::Invalid if the + property has no QVariant type. +*/ +int QDeclarativeProperty::propertyType() const +{ + return d->propertyType(); +} + +int QDeclarativePropertyPrivate::propertyType() const +{ + uint type = q->type(); + if (type & QDeclarativeProperty::ValueTypeProperty) { + return valueType.valueTypePropType; + } else if (type & QDeclarativeProperty::Property) { + if (core.propType == (int)QVariant::LastType) + return qMetaTypeId<QVariant>(); + else + return core.propType; + } else { + return QVariant::Invalid; + } +} + +/*! + Returns the type of the property. +*/ +QDeclarativeProperty::Type QDeclarativeProperty::type() const +{ + if (d->core.flags & QDeclarativePropertyCache::Data::IsFunction) + return SignalProperty; + else if (d->valueType.valueTypeCoreIdx != -1) + return (Type)(Property | ValueTypeProperty); + else if (d->core.isValid()) + return (Type)(Property | ((d->isDefaultProperty)?Default:0)); + else + return Invalid; +} + +/*! + Returns true if this QDeclarativeProperty represents a regular Qt property. +*/ +bool QDeclarativeProperty::isProperty() const +{ + return type() & Property; +} + +/*! + Returns true if this QDeclarativeProperty represents a default property. +*/ +bool QDeclarativeProperty::isDefault() const +{ + return type() & Default; +} + +/*! + Returns the QDeclarativeProperty's QObject. +*/ +QObject *QDeclarativeProperty::object() const +{ + return d->object; +} + +/*! + Assign \a other to this QDeclarativeProperty. +*/ +QDeclarativeProperty &QDeclarativeProperty::operator=(const QDeclarativeProperty &other) +{ + d->context = other.d->context; + d->object = other.d->object; + + d->isDefaultProperty = other.d->isDefaultProperty; + d->isNameCached = other.d->isNameCached; + d->core = other.d->core; + d->nameCache = other.d->nameCache; + + d->valueType = other.d->valueType; + + return *this; +} + +/*! + Returns true if the property is writable, otherwise false. +*/ +bool QDeclarativeProperty::isWritable() const +{ + QDeclarativeProperty::PropertyTypeCategory category = propertyTypeCategory(); + + if (!d->object) + return false; + if (category == List) + return true; + else if (type() & SignalProperty) + return false; + else if (d->core.isValid() && d->object) + return d->core.flags & QDeclarativePropertyCache::Data::IsWritable; + else + return false; +} + +/*! + Returns true if the property is designable, otherwise false. +*/ +bool QDeclarativeProperty::isDesignable() const +{ + if (type() & Property && d->core.isValid() && d->object) + return d->object->metaObject()->property(d->core.coreIndex).isDesignable(); + else + return false; +} + +/*! + Returns true if the property is resettable, otherwise false. +*/ +bool QDeclarativeProperty::isResettable() const +{ + if (type() & Property && d->core.isValid() && d->object) + return d->core.flags & QDeclarativePropertyCache::Data::IsResettable; + else + return false; +} + +/*! + Returns true if the QDeclarativeProperty refers to a valid property, otherwise + false. +*/ +bool QDeclarativeProperty::isValid() const +{ + return type() != Invalid; +} + +/*! + Return the name of this QML property. +*/ +QString QDeclarativeProperty::name() const +{ + if (!d->isNameCached) { + // ### + if (!d->object) { + } else if (type() & ValueTypeProperty) { + QString rv = d->core.name(d->object) + QLatin1Char('.'); + + QDeclarativeEnginePrivate *ep = d->context?QDeclarativeEnginePrivate::get(d->context->engine()):0; + QDeclarativeValueType *valueType = 0; + if (ep) valueType = ep->valueTypes[d->core.propType]; + else valueType = QDeclarativeValueTypeFactory::valueType(d->core.propType); + Q_ASSERT(valueType); + + rv += QString::fromUtf8(valueType->metaObject()->property(d->valueType.valueTypeCoreIdx).name()); + + if (!ep) delete valueType; + + d->nameCache = rv; + } else if (type() & SignalProperty) { + QString name = QLatin1String("on") + d->core.name(d->object); + name[2] = name.at(2).toUpper(); + d->nameCache = name; + } else { + d->nameCache = d->core.name(d->object); + } + d->isNameCached = true; + } + + return d->nameCache; +} + +/*! + Returns the \l{QMetaProperty} {Qt property} associated with + this QML property. + */ +QMetaProperty QDeclarativeProperty::property() const +{ + if (type() & Property && d->core.isValid() && d->object) + return d->object->metaObject()->property(d->core.coreIndex); + else + return QMetaProperty(); +} + +/*! + Return the QMetaMethod for this property if it is a SignalProperty, + otherwise returns an invalid QMetaMethod. +*/ +QMetaMethod QDeclarativeProperty::method() const +{ + if (type() & SignalProperty && d->object) + return d->object->metaObject()->method(d->core.coreIndex); + else + return QMetaMethod(); +} + + +/*! + Returns the binding associated with this property, or 0 if no binding + exists. +*/ +QDeclarativeAbstractBinding * +QDeclarativePropertyPrivate::binding(const QDeclarativeProperty &that) +{ + if (!that.isProperty() || !that.d->object) + return 0; + + QDeclarativeDeclarativeData *data = QDeclarativeDeclarativeData::get(that.d->object); + if (!data) + return 0; + + if (!data->hasBindingBit(that.d->core.coreIndex)) + return 0; + + QDeclarativeAbstractBinding *binding = data->bindings; + while (binding) { + // ### This wont work for value types + if (binding->propertyIndex() == that.d->core.coreIndex) + return binding; + binding = binding->m_nextBinding; + } + return 0; +} + +/*! + Set the binding associated with this property to \a newBinding. Returns + the existing binding (if any), otherwise 0. + + \a newBinding will be enabled, and the returned binding (if any) will be + disabled. + + Ownership of \a newBinding transfers to QML. Ownership of the return value + is assumed by the caller. + + \a flags is passed through to the binding and is used for the initial update (when + the binding sets the intial value, it will use these flags for the write). +*/ +QDeclarativeAbstractBinding * +QDeclarativePropertyPrivate::setBinding(const QDeclarativeProperty &that, + QDeclarativeAbstractBinding *newBinding, + WriteFlags flags) +{ + if (!that.isProperty() || !that.d->object) { + if (newBinding) + newBinding->destroy(); + return 0; + } + + return that.d->setBinding(that.d->object, that.d->core, newBinding, flags); +} + +QDeclarativeAbstractBinding * +QDeclarativePropertyPrivate::setBinding(QObject *object, const QDeclarativePropertyCache::Data &core, + QDeclarativeAbstractBinding *newBinding, WriteFlags flags) +{ + QDeclarativeDeclarativeData *data = QDeclarativeDeclarativeData::get(object, 0 != newBinding); + + if (data && data->hasBindingBit(core.coreIndex)) { + QDeclarativeAbstractBinding *binding = data->bindings; + while (binding) { + // ### This wont work for value types + if (binding->propertyIndex() == core.coreIndex) { + binding->setEnabled(false); + + if (newBinding) + newBinding->setEnabled(true, flags); + + return binding; // ### QDeclarativeAbstractBinding; + } + + binding = binding->m_nextBinding; + } + } + + if (newBinding) + newBinding->setEnabled(true, flags); + + return 0; +} + +/*! + Returns the expression associated with this signal property, or 0 if no + signal expression exists. +*/ +QDeclarativeExpression * +QDeclarativePropertyPrivate::signalExpression(const QDeclarativeProperty &that) +{ + if (!(that.type() & QDeclarativeProperty::SignalProperty)) + return 0; + + const QObjectList &children = that.d->object->children(); + + for (int ii = 0; ii < children.count(); ++ii) { + QObject *child = children.at(ii); + + QDeclarativeBoundSignal *signal = QDeclarativeBoundSignal::cast(child); + if (signal && signal->index() == that.coreIndex()) + return signal->expression(); + } + + return 0; +} + +/*! + Set the signal expression associated with this signal property to \a expr. + Returns the existing signal expression (if any), otherwise 0. + + Ownership of \a expr transfers to QML. Ownership of the return value is + assumed by the caller. +*/ +QDeclarativeExpression * +QDeclarativePropertyPrivate::setSignalExpression(const QDeclarativeProperty &that, + QDeclarativeExpression *expr) +{ + if (!(that.type() & QDeclarativeProperty::SignalProperty)) { + delete expr; + return 0; + } + + const QObjectList &children = that.d->object->children(); + + for (int ii = 0; ii < children.count(); ++ii) { + QObject *child = children.at(ii); + + QDeclarativeBoundSignal *signal = QDeclarativeBoundSignal::cast(child); + if (signal && signal->index() == that.coreIndex()) + return signal->setExpression(expr); + } + + if (expr) { + QDeclarativeBoundSignal *signal = new QDeclarativeBoundSignal(that.d->object, that.method(), that.d->object); + return signal->setExpression(expr); + } else { + return 0; + } +} + +/*! + Returns the property value. +*/ +QVariant QDeclarativeProperty::read() const +{ + if (!d->object) + return QVariant(); + + if (type() & SignalProperty) { + + return QVariant(); + + } else if (type() & Property) { + + return d->readValueProperty(); + + } + return QVariant(); +} + +QVariant QDeclarativePropertyPrivate::readValueProperty() +{ + uint type = q->type(); + if(type & QDeclarativeProperty::ValueTypeProperty) { + + QDeclarativeEnginePrivate *ep = QDeclarativeEnginePrivate::get(context); + QDeclarativeValueType *valueType = 0; + if (ep) valueType = ep->valueTypes[core.propType]; + else valueType = QDeclarativeValueTypeFactory::valueType(core.propType); + Q_ASSERT(valueType); + + valueType->read(object, core.coreIndex); + + QVariant rv = + valueType->metaObject()->property(this->valueType.valueTypeCoreIdx).read(valueType); + + if (!ep) delete valueType; + return rv; + + } else if(core.flags & QDeclarativePropertyCache::Data::IsQList) { + + QDeclarativeListProperty<QObject> prop; + void *args[] = { &prop, 0 }; + QMetaObject::metacall(object, QMetaObject::ReadProperty, core.coreIndex, args); + return QVariant::fromValue(QDeclarativeListReferencePrivate::init(prop, core.propType, context?context->engine():0)); + + } else { + + return object->metaObject()->property(core.coreIndex).read(object.data()); + + } +} + +//### +//writeEnumProperty MIRRORS the relelvant bit of QMetaProperty::write AND MUST BE KEPT IN SYNC! +//### +bool QDeclarativePropertyPrivate::writeEnumProperty(const QMetaProperty &prop, int idx, QObject *object, const QVariant &value, int flags) +{ + if (!object || !prop.isWritable()) + return false; + + QVariant v = value; + if (prop.isEnumType()) { + QMetaEnum menum = prop.enumerator(); + if (v.userType() == QVariant::String +#ifdef QT3_SUPPORT + || v.userType() == QVariant::CString +#endif + ) { + if (prop.isFlagType()) + v = QVariant(menum.keysToValue(value.toByteArray())); + else + v = QVariant(menum.keyToValue(value.toByteArray())); + } else if (v.userType() != QVariant::Int && v.userType() != QVariant::UInt) { + int enumMetaTypeId = QMetaType::type(QByteArray(menum.scope()) + "::" + menum.name()); + if ((enumMetaTypeId == 0) || (v.userType() != enumMetaTypeId) || !v.constData()) + return false; + v = QVariant(*reinterpret_cast<const int *>(v.constData())); + } + v.convert(QVariant::Int); + } + + // the status variable is changed by qt_metacall to indicate what it did + // this feature is currently only used by QtDBus and should not be depended + // upon. Don't change it without looking into QDBusAbstractInterface first + // -1 (unchanged): normal qt_metacall, result stored in argv[0] + // changed: result stored directly in value, return the value of status + int status = -1; + void *argv[] = { v.data(), &v, &status, &flags }; + QMetaObject::metacall(object, QMetaObject::WriteProperty, idx, argv); + return status; +} + +bool QDeclarativePropertyPrivate::writeValueProperty(const QVariant &value, WriteFlags flags) +{ + // Remove any existing bindings on this property + if (!(flags & DontRemoveBinding)) { + QDeclarativeAbstractBinding *binding = setBinding(*q, 0); + if (binding) binding->destroy(); + } + + bool rv = false; + uint type = q->type(); + if (type & QDeclarativeProperty::ValueTypeProperty) { + QDeclarativeEnginePrivate *ep = QDeclarativeEnginePrivate::get(context); + + QDeclarativeValueType *writeBack = 0; + if (ep) { + writeBack = ep->valueTypes[core.propType]; + } else { + writeBack = QDeclarativeValueTypeFactory::valueType(core.propType); + } + + writeBack->read(object, core.coreIndex); + + QDeclarativePropertyCache::Data data = core; + data.flags = valueType.flags; + data.coreIndex = valueType.valueTypeCoreIdx; + data.propType = valueType.valueTypePropType; + rv = write(writeBack, data, value, context, flags); + + writeBack->write(object, core.coreIndex, flags); + if (!ep) delete writeBack; + + } else { + + rv = write(object, core, value, context, flags); + + } + + return rv; +} + +bool QDeclarativePropertyPrivate::write(QObject *object, const QDeclarativePropertyCache::Data &property, + const QVariant &value, QDeclarativeContext *context, + WriteFlags flags) +{ + int coreIdx = property.coreIndex; + int status = -1; //for dbus + + if (property.flags & QDeclarativePropertyCache::Data::IsEnumType) { + QMetaProperty prop = object->metaObject()->property(property.coreIndex); + QVariant v = value; + // Enum values come through the script engine as doubles + if (value.userType() == QVariant::Double) { + double integral; + double fractional = modf(value.toDouble(), &integral); + if (qFuzzyIsNull(fractional)) + v.convert(QVariant::Int); + } + return writeEnumProperty(prop, coreIdx, object, v, flags); + } + + int propertyType = property.propType; + int variantType = value.userType(); + + QDeclarativeEnginePrivate *enginePriv = QDeclarativeEnginePrivate::get(context); + + if (propertyType == QVariant::Url) { + + QUrl u; + bool found = false; + if (variantType == QVariant::Url) { + u = value.toUrl(); + found = true; + } else if (variantType == QVariant::ByteArray) { + u = QUrl(QString::fromUtf8(value.toByteArray())); + found = true; + } else if (variantType == QVariant::String) { + u = QUrl(value.toString()); + found = true; + } + + if (!found) + return false; + + if (context && u.isRelative() && !u.isEmpty()) + u = context->resolvedUrl(u); + int status = -1; + void *argv[] = { &u, 0, &status, &flags }; + QMetaObject::metacall(object, QMetaObject::WriteProperty, coreIdx, argv); + + } else if (variantType == propertyType) { + + void *a[] = { (void *)value.constData(), 0, &status, &flags }; + QMetaObject::metacall(object, QMetaObject::WriteProperty, coreIdx, a); + + } else if (qMetaTypeId<QVariant>() == propertyType) { + + void *a[] = { (void *)&value, 0, &status, &flags }; + QMetaObject::metacall(object, QMetaObject::WriteProperty, coreIdx, a); + + } else if (property.flags & QDeclarativePropertyCache::Data::IsQObjectDerived) { + + const QMetaObject *valMo = rawMetaObjectForType(enginePriv, value.userType()); + + if (!valMo) + return false; + + QObject *o = *(QObject **)value.constData(); + const QMetaObject *propMo = rawMetaObjectForType(enginePriv, propertyType); + + if (o) valMo = o->metaObject(); + + if (canConvert(valMo, propMo)) { + void *args[] = { &o, 0, &status, &flags }; + QMetaObject::metacall(object, QMetaObject::WriteProperty, coreIdx, + args); + } else if (!o && canConvert(propMo, valMo)) { + // In the case of a null QObject, we assign the null if there is + // any change that the null variant type could be up or down cast to + // the property type. + void *args[] = { &o, 0, &status, &flags }; + QMetaObject::metacall(object, QMetaObject::WriteProperty, coreIdx, + args); + } else { + return false; + } + + } else if (property.flags & QDeclarativePropertyCache::Data::IsQList) { + + const QMetaObject *listType = 0; + if (enginePriv) { + listType = enginePriv->rawMetaObjectForType(enginePriv->listType(property.propType)); + } else { + QDeclarativeType *type = QDeclarativeMetaType::qmlType(QDeclarativeMetaType::listType(property.propType)); + if (!type) return false; + listType = type->baseMetaObject(); + } + if (!listType) return false; + + QDeclarativeListProperty<void> prop; + void *args[] = { &prop, 0 }; + QMetaObject::metacall(object, QMetaObject::ReadProperty, coreIdx, args); + + if (!prop.clear) return false; + + prop.clear(&prop); + + if (value.userType() == qMetaTypeId<QList<QObject *> >()) { + const QList<QObject *> &list = qvariant_cast<QList<QObject *> >(value); + + for (int ii = 0; ii < list.count(); ++ii) { + QObject *o = list.at(ii); + if (!canConvert(o->metaObject(), listType)) + o = 0; + prop.append(&prop, (void *)o); + } + } else { + QObject *o = enginePriv?enginePriv->toQObject(value):QDeclarativeMetaType::toQObject(value); + if (!canConvert(o->metaObject(), listType)) + o = 0; + prop.append(&prop, (void *)o); + } + + } else { + Q_ASSERT(variantType != propertyType); + + QVariant v = value; + if (v.convert((QVariant::Type)propertyType)) { + void *a[] = { (void *)v.constData(), 0, &status, &flags}; + QMetaObject::metacall(object, QMetaObject::WriteProperty, coreIdx, a); + } else if ((uint)propertyType >= QVariant::UserType && variantType == QVariant::String) { + QDeclarativeMetaType::StringConverter con = QDeclarativeMetaType::customStringConverter(propertyType); + if (!con) + return false; + + QVariant v = con(value.toString()); + if (v.userType() == propertyType) { + void *a[] = { (void *)v.constData(), 0, &status, &flags}; + QMetaObject::metacall(object, QMetaObject::WriteProperty, coreIdx, a); + } + } else if (variantType == QVariant::String) { + bool ok = false; + QVariant v = QDeclarativeStringConverters::variantFromString(value.toString(), propertyType, &ok); + if (!ok) + return false; + + void *a[] = { (void *)v.constData(), 0, &status, &flags}; + QMetaObject::metacall(object, QMetaObject::WriteProperty, coreIdx, a); + } else { + return false; + } + } + + return true; +} + +const QMetaObject *QDeclarativePropertyPrivate::rawMetaObjectForType(QDeclarativeEnginePrivate *engine, int userType) +{ + if (engine) { + return engine->rawMetaObjectForType(userType); + } else { + QDeclarativeType *type = QDeclarativeMetaType::qmlType(userType); + return type?type->baseMetaObject():0; + } +} + +/*! + Set the property value to \a value. +*/ +bool QDeclarativeProperty::write(const QVariant &value) const +{ + return QDeclarativePropertyPrivate::write(*this, value, 0); +} + +/*! + Resets the property value. +*/ +bool QDeclarativeProperty::reset() const +{ + if (isResettable()) { + void *args[] = { 0 }; + QMetaObject::metacall(d->object, QMetaObject::ResetProperty, d->core.coreIndex, args); + return true; + } else { + return false; + } +} + +bool QDeclarativePropertyPrivate::write(const QDeclarativeProperty &that, + const QVariant &value, WriteFlags flags) +{ + if (that.d->object && that.type() & QDeclarativeProperty::Property && + that.d->core.isValid() && that.isWritable()) + return that.d->writeValueProperty(value, flags); + else + return false; +} + +/*! + Returns true if the property has a change notifier signal, otherwise false. +*/ +bool QDeclarativeProperty::hasChangedNotifier() const +{ + if (type() & Property && d->object) { + return d->object->metaObject()->property(d->core.coreIndex).hasNotifySignal(); + } + return false; +} + +/*! + Returns true if the property needs a change notifier signal for bindings + to remain upto date, false otherwise. + + Some properties, such as attached properties or those whose value never + changes, do not require a change notifier. +*/ +bool QDeclarativeProperty::needsChangedNotifier() const +{ + return type() & Property && !property().isConstant(); +} + +/*! + Connects the property's change notifier signal to the + specified \a method of the \a dest object and returns + true. Returns false if this metaproperty does not + represent a regular Qt property or if it has no + change notifier signal, or if the \a dest object does + not have the specified \a method. +*/ +bool QDeclarativeProperty::connectNotifier(QObject *dest, int method) const +{ + if (!(type() & Property) || !d->object) + return false; + + QMetaProperty prop = d->object->metaObject()->property(d->core.coreIndex); + if (prop.hasNotifySignal()) { + return QMetaObject::connect(d->object, prop.notifySignalIndex(), dest, method, Qt::DirectConnection); + } else { + return false; + } +} + +/*! + Connects the property's change notifier signal to the + specified \a slot of the \a dest object and returns + true. Returns false if this metaproperty does not + represent a regular Qt property or if it has no + change notifier signal, or if the \a dest object does + not have the specified \a slot. +*/ +bool QDeclarativeProperty::connectNotifier(QObject *dest, const char *slot) const +{ + if (!(type() & Property) || !d->object) + return false; + + QMetaProperty prop = d->object->metaObject()->property(d->core.coreIndex); + if (prop.hasNotifySignal()) { + QByteArray signal(QByteArray("2") + prop.notifySignal().signature()); + return QObject::connect(d->object, signal.constData(), dest, slot); + } else { + return false; + } +} + +/*! + Return the Qt metaobject index of the property. +*/ +int QDeclarativeProperty::coreIndex() const +{ + return d->core.coreIndex; +} + +int QDeclarativePropertyPrivate::valueTypeCoreIndex(const QDeclarativeProperty &that) +{ + return that.d->valueType.valueTypeCoreIdx; +} + +struct SerializedData { + QDeclarativeProperty::Type type; + QDeclarativePropertyCache::Data core; +}; + +struct ValueTypeSerializedData : public SerializedData { + QDeclarativePropertyCache::ValueTypeData valueType; +}; + +QByteArray QDeclarativePropertyPrivate::saveValueType(const QMetaObject *metaObject, int index, + const QMetaObject *subObject, int subIndex) +{ + QMetaProperty prop = metaObject->property(index); + QMetaProperty subProp = subObject->property(subIndex); + + ValueTypeSerializedData sd; + sd.type = QDeclarativeProperty::ValueTypeProperty; + sd.core.load(metaObject->property(index)); + sd.valueType.flags = QDeclarativePropertyCache::Data::flagsForProperty(subProp); + sd.valueType.valueTypeCoreIdx = subIndex; + sd.valueType.valueTypePropType = subProp.userType(); + + QByteArray rv((const char *)&sd, sizeof(sd)); + + return rv; +} + +QByteArray QDeclarativePropertyPrivate::saveProperty(const QMetaObject *metaObject, int index) +{ + SerializedData sd; + sd.type = QDeclarativeProperty::Property; + sd.core.load(metaObject->property(index)); + + QByteArray rv((const char *)&sd, sizeof(sd)); + return rv; +} + +QDeclarativeProperty +QDeclarativePropertyPrivate::restore(const QByteArray &data, QObject *object, QDeclarativeContext *ctxt) +{ + QDeclarativeProperty prop; + + if (data.isEmpty()) + return prop; + + prop.d->object = object; + prop.d->context = ctxt; + + const SerializedData *sd = (const SerializedData *)data.constData(); + if (sd->type == QDeclarativeProperty::Property) { + prop.d->core = sd->core; + } else if(sd->type == QDeclarativeProperty::ValueTypeProperty) { + const ValueTypeSerializedData *vt = (const ValueTypeSerializedData *)sd; + prop.d->core = vt->core; + prop.d->valueType = vt->valueType; + } + + return prop; +} + +/*! + Returns true if lhs and rhs refer to the same metaobject data +*/ +bool QDeclarativePropertyPrivate::equal(const QMetaObject *lhs, const QMetaObject *rhs) +{ + return lhs == rhs || (1 && lhs && rhs && lhs->d.stringdata == rhs->d.stringdata); +} + +/*! + Returns true if from inherits to. +*/ +bool QDeclarativePropertyPrivate::canConvert(const QMetaObject *from, const QMetaObject *to) +{ + if (from && to == &QObject::staticMetaObject) + return true; + + while (from) { + if (equal(from, to)) + return true; + from = from->superClass(); + } + + return false; +} + +QT_END_NAMESPACE |