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Diffstat (limited to 'src/quick/designer/qqmldesignermetaobject.cpp')
| -rw-r--r-- | src/quick/designer/qqmldesignermetaobject.cpp | 340 |
1 files changed, 340 insertions, 0 deletions
diff --git a/src/quick/designer/qqmldesignermetaobject.cpp b/src/quick/designer/qqmldesignermetaobject.cpp new file mode 100644 index 0000000000..76c94b242d --- /dev/null +++ b/src/quick/designer/qqmldesignermetaobject.cpp @@ -0,0 +1,340 @@ +/**************************************************************************** +** +** Copyright (C) 2015 The Qt Company Ltd. +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the QtQuick module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL21$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see http://www.qt.io/terms-conditions. For further +** information use the contact form at http://www.qt.io/contact-us. +** +** 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 or version 3 as published by the Free +** Software Foundation and appearing in the file LICENSE.LGPLv21 and +** LICENSE.LGPLv3 included in the packaging of this file. Please review the +** following information to ensure the GNU Lesser General Public License +** requirements will be met: https://www.gnu.org/licenses/lgpl.html and +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** As a special exception, The Qt Company gives you certain additional +** rights. These rights are described in The Qt Company LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qqmldesignermetaobject_p.h" + +#include <QSharedPointer> +#include <QMetaProperty> +#include <qnumeric.h> +#include <QDebug> + +#include <private/qqmlengine_p.h> +#include <private/qqmlpropertycache_p.h> + +QT_BEGIN_NAMESPACE + +static QHash<QDynamicMetaObjectData *, bool> nodeInstanceMetaObjectList; +static void (*notifyPropertyChangeCallBack)(QObject*, const QQuickDesignerSupport::PropertyName &propertyName) = 0; + +struct MetaPropertyData { + inline QPair<QVariant, bool> &getDataRef(int idx) { + while (m_data.count() <= idx) + m_data << QPair<QVariant, bool>(QVariant(), false); + return m_data[idx]; + } + + inline QVariant &getData(int idx) { + QPair<QVariant, bool> &prop = getDataRef(idx); + if (!prop.second) { + prop.first = QVariant(); + prop.second = true; + } + return prop.first; + } + + inline bool hasData(int idx) const { + if (idx >= m_data.count()) + return false; + return m_data[idx].second; + } + + inline int count() { return m_data.count(); } + + QVector<QPair<QVariant, bool> > m_data; +}; + +static bool constructedMetaData(const QQmlVMEMetaData* data) +{ + return data->propertyCount == 0 + && data->aliasCount == 0 + && data->signalCount == 0 + && data->methodCount == 0; +} + +static QQmlVMEMetaData* fakeMetaData() +{ + QQmlVMEMetaData* data = new QQmlVMEMetaData; + data->propertyCount = 0; + data->aliasCount = 0; + data->signalCount = 0; + data->methodCount = 0; + + return data; +} + +static const QQmlVMEMetaData* vMEMetaDataForObject(QObject *object) +{ + QQmlVMEMetaObject *metaObject = QQmlVMEMetaObject::get(object); + if (metaObject) + return metaObject->metaData; + + return fakeMetaData(); +} + +static QQmlPropertyCache *cacheForObject(QObject *object, QQmlEngine *engine) +{ + QQmlVMEMetaObject *metaObject = QQmlVMEMetaObject::get(object); + if (metaObject) + return metaObject->cache; + + return QQmlEnginePrivate::get(engine)->cache(object); +} + +QQmlDesignerMetaObject* QQmlDesignerMetaObject::getNodeInstanceMetaObject(QObject *object, QQmlEngine *engine) +{ + //Avoid setting up multiple MetaObjects on the same QObject + QObjectPrivate *op = QObjectPrivate::get(object); + QDynamicMetaObjectData *parent = op->metaObject; + if (nodeInstanceMetaObjectList.contains(parent)) + return static_cast<QQmlDesignerMetaObject *>(parent); + + // we just create one and the ownership goes automatically to the object in nodeinstance see init method + return new QQmlDesignerMetaObject(object, engine); +} + +void QQmlDesignerMetaObject::init(QObject *object, QQmlEngine *engine) +{ + //Creating QQmlOpenMetaObjectType + m_type = new QQmlOpenMetaObjectType(metaObjectParent(), engine); + m_type->addref(); + //Assigning type to this + copyTypeMetaObject(); + + //Assign this to object + QObjectPrivate *op = QObjectPrivate::get(object); + op->metaObject = this; + + //create cache + cache = m_cache = QQmlEnginePrivate::get(engine)->cache(this); + cache->addref(); + + //If our parent is not a VMEMetaObject we just se the flag to false again + if (constructedMetaData(metaData)) + QQmlData::get(object)->hasVMEMetaObject = false; + + nodeInstanceMetaObjectList.insert(this, true); + hasAssignedMetaObjectData = true; +} + +QQmlDesignerMetaObject::QQmlDesignerMetaObject(QObject *object, QQmlEngine *engine) + : QQmlVMEMetaObject(object, cacheForObject(object, engine), vMEMetaDataForObject(object)), + m_context(engine->contextForObject(object)), + m_data(new MetaPropertyData), + m_cache(0) +{ + init(object, engine); + + QQmlData *ddata = QQmlData::get(object, false); + + //Assign cache to object + if (ddata && ddata->propertyCache) { + cache->setParent(ddata->propertyCache); + cache->invalidate(engine, this); + ddata->propertyCache = m_cache; + } + +} + +QQmlDesignerMetaObject::~QQmlDesignerMetaObject() +{ + if (cache->count() > 1) // qml is crashing because the property cache is not removed from the engine + cache->release(); + else + m_type->release(); + + nodeInstanceMetaObjectList.remove(this); +} + +void QQmlDesignerMetaObject::createNewDynamicProperty(const QString &name) +{ + int id = m_type->createProperty(name.toUtf8()); + copyTypeMetaObject(); + setValue(id, QVariant()); + Q_ASSERT(id >= 0); + Q_UNUSED(id); + + //Updating cache + QQmlPropertyCache *oldParent = m_cache->parent(); + QQmlEnginePrivate::get(m_context->engine())->cache(this)->invalidate(m_context->engine(), this); + m_cache->setParent(oldParent); + + QQmlProperty property(myObject(), name, m_context); + Q_ASSERT(property.isValid()); +} + +void QQmlDesignerMetaObject::setValue(int id, const QVariant &value) +{ + QPair<QVariant, bool> &prop = m_data->getDataRef(id); + prop.first = propertyWriteValue(id, value); + prop.second = true; + QMetaObject::activate(myObject(), id + m_type->signalOffset(), 0); +} + +QVariant QQmlDesignerMetaObject::propertyWriteValue(int, const QVariant &value) +{ + return value; +} + +const QAbstractDynamicMetaObject *QQmlDesignerMetaObject::dynamicMetaObjectParent() const +{ + if (QQmlVMEMetaObject::parent.isT1()) + return QQmlVMEMetaObject::parent.asT1()->toDynamicMetaObject(QQmlVMEMetaObject::object); + else + return 0; +} + +const QMetaObject *QQmlDesignerMetaObject::metaObjectParent() const +{ + if (QQmlVMEMetaObject::parent.isT1()) + return QQmlVMEMetaObject::parent.asT1()->toDynamicMetaObject(QQmlVMEMetaObject::object); + + return QQmlVMEMetaObject::parent.asT2(); +} + +int QQmlDesignerMetaObject::propertyOffset() const +{ + return cache->propertyOffset(); +} + +int QQmlDesignerMetaObject::openMetaCall(QObject *o, QMetaObject::Call call, int id, void **a) +{ + if ((call == QMetaObject::ReadProperty || call == QMetaObject::WriteProperty) + && id >= m_type->propertyOffset()) { + int propId = id - m_type->propertyOffset(); + if (call == QMetaObject::ReadProperty) { + //propertyRead(propId); + *reinterpret_cast<QVariant *>(a[0]) = m_data->getData(propId); + } else if (call == QMetaObject::WriteProperty) { + if (propId <= m_data->count() || m_data->m_data[propId].first != *reinterpret_cast<QVariant *>(a[0])) { + //propertyWrite(propId); + QPair<QVariant, bool> &prop = m_data->getDataRef(propId); + prop.first = propertyWriteValue(propId, *reinterpret_cast<QVariant *>(a[0])); + prop.second = true; + //propertyWritten(propId); + activate(myObject(), m_type->signalOffset() + propId, 0); + } + } + return -1; + } else { + QAbstractDynamicMetaObject *directParent = parent(); + if (directParent) + return directParent->metaCall(o, call, id, a); + else + return myObject()->qt_metacall(call, id, a); + } +} + +int QQmlDesignerMetaObject::metaCall(QObject *o, QMetaObject::Call call, int id, void **a) +{ + Q_ASSERT(myObject() == o); + + int metaCallReturnValue = -1; + + const QMetaProperty propertyById = QQmlVMEMetaObject::property(id); + + if (call == QMetaObject::WriteProperty + && propertyById.userType() == QMetaType::QVariant + && reinterpret_cast<QVariant *>(a[0])->type() == QVariant::Double + && qIsNaN(reinterpret_cast<QVariant *>(a[0])->toDouble())) { + return -1; + } + + if (call == QMetaObject::WriteProperty + && propertyById.userType() == QMetaType::Double + && qIsNaN(*reinterpret_cast<double*>(a[0]))) { + return -1; + } + + if (call == QMetaObject::WriteProperty + && propertyById.userType() == QMetaType::Float + && qIsNaN(*reinterpret_cast<float*>(a[0]))) { + return -1; + } + + QVariant oldValue; + + if (call == QMetaObject::WriteProperty && !propertyById.hasNotifySignal()) + { + oldValue = propertyById.read(myObject()); + } + + QAbstractDynamicMetaObject *directParent = parent(); + if (directParent && id < directParent->propertyOffset()) { + metaCallReturnValue = directParent->metaCall(o, call, id, a); + } else { + openMetaCall(o, call, id, a); + } + + + if (call == QMetaObject::WriteProperty + && !propertyById.hasNotifySignal() + && oldValue != propertyById.read(myObject())) + notifyPropertyChange(id); + + return metaCallReturnValue; +} + +void QQmlDesignerMetaObject::notifyPropertyChange(int id) +{ + const QMetaProperty propertyById = property(id); + + if (id < propertyOffset()) { + if (notifyPropertyChangeCallBack) + notifyPropertyChangeCallBack(myObject(), propertyById.name()); + } else { + if (notifyPropertyChangeCallBack) + notifyPropertyChangeCallBack(myObject(), name(id - propertyOffset())); + } +} + +int QQmlDesignerMetaObject::count() const +{ + return m_type->propertyCount(); +} + +QByteArray QQmlDesignerMetaObject::name(int idx) const +{ + return m_type->propertyName(idx); +} + +void QQmlDesignerMetaObject::copyTypeMetaObject() +{ + *static_cast<QMetaObject *>(this) = *m_type->metaObject(); +} + +void QQmlDesignerMetaObject::registerNotifyPropertyChangeCallBack(void (*callback)(QObject *, const QQuickDesignerSupport::PropertyName &)) +{ + notifyPropertyChangeCallBack = callback; +} + +QT_END_NAMESPACE |