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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** Copyright (C) 2013 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Milian Wolff <milian.wolff@kdab.com>
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QWebChannel module on Qt labs.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 "qtmetaobjectpublisher.h"
#include <QStringList>
#include <QMetaObject>
#include <QMetaProperty>
static const QString KEY_SIGNALS = QStringLiteral("signals");
static const QString KEY_METHODS = QStringLiteral("methods");
static const QString KEY_PROPERTIES = QStringLiteral("properties");
static const QString KEY_ENUMS = QStringLiteral("enums");
static const QString KEY_QOBJECT = QStringLiteral("__QObject*__");
static const QString KEY_ID = QStringLiteral("id");
static const QString KEY_DATA = QStringLiteral("data");
QtMetaObjectPublisher::QtMetaObjectPublisher(QQuickItem *parent)
: QQuickItem(parent)
{
}
QVariantMap QtMetaObjectPublisher::classInfoForObjects(const QVariantMap &objectMap) const
{
QVariantMap ret;
QMap<QString, QVariant>::const_iterator it = objectMap.constBegin();
while (it != objectMap.constEnd()) {
QObject* object = it.value().value<QObject*>();
if (object) {
const QVariantMap &info = classInfoForObject(object);
if (!info.isEmpty()) {
ret[it.key()] = info;
}
}
++it;
}
return ret;
}
QVariantMap QtMetaObjectPublisher::classInfoForObject(QObject *object) const
{
QVariantMap data;
if (!object) {
qWarning("null object given to MetaObjectPublisher - bad API usage?");
return data;
}
QVariantList qtSignals, qtMethods;
QVariantList qtProperties;
QVariantMap qtEnums;
const QMetaObject* metaObject = object->metaObject();
QSet<int> notifySignals;
QSet<QString> properties;
for (int i = 0; i < metaObject->propertyCount(); ++i) {
const QMetaProperty &prop = metaObject->property(i);
QVariantList propertyInfo;
const QString &propertyName = QString::fromLatin1(prop.name());
propertyInfo.append(propertyName);
properties << propertyName;
if (prop.hasNotifySignal()) {
notifySignals << prop.notifySignalIndex();
const int numParams = prop.notifySignal().parameterCount();
if (numParams > 1) {
qWarning("Notify signal for property '%s' has %d parameters, expected zero or one.",
prop.name(), numParams);
}
propertyInfo.append(QString::fromLatin1(prop.notifySignal().name()));
} else {
if (!prop.isConstant()) {
qWarning("Property '%s'' of object '%s' has no notify signal and is not constant, "
"value updates in HTML will be broken!",
prop.name(), object->metaObject()->className());
}
propertyInfo.append(QString());
}
propertyInfo.append(prop.read(object));
qtProperties.append(QVariant::fromValue(propertyInfo));
}
for (int i = 0; i < metaObject->methodCount(); ++i) {
if (notifySignals.contains(i)) {
continue;
}
const QMetaMethod &method = metaObject->method(i);
//NOTE: This will not work for overloaded methods/signals.
//NOTE: this must be a string, otherwise it will be converted to '{}' in QML
const QString &name = QString::fromLatin1(method.name());
if (properties.contains(name)) {
// optimize: Don't send the getter method, it gets overwritten by the
// property on the client side anyways.
continue;
}
if (method.access() == QMetaMethod::Public)
qtMethods << name;
if (method.methodType() == QMetaMethod::Signal)
qtSignals << name;
}
for (int i = 0; i < metaObject->enumeratorCount(); ++i) {
QMetaEnum enumerator = metaObject->enumerator(i);
QVariantMap values;
for (int k = 0; k < enumerator.keyCount(); ++k) {
values[enumerator.key(k)] = enumerator.value(k);
}
qtEnums[enumerator.name()] = values;
}
data[KEY_SIGNALS] = qtSignals;
data[KEY_METHODS] = qtMethods;
data[KEY_PROPERTIES] = QVariant::fromValue(qtProperties);
data[KEY_ENUMS] = qtEnums;
return data;
}
static QString objectId(QObject *object)
{
return QString::number(quintptr(object), 16);
}
QVariant QtMetaObjectPublisher::wrapObject(QObject *object)
{
if (!object)
return QVariant();
const QString& id = objectId(object);
const WrapMapCIt& p = m_wrappedObjects.constFind(id);
if (p != m_wrappedObjects.constEnd())
return p.value().second;
QVariantMap objectInfo;
objectInfo[KEY_QOBJECT] = true;
objectInfo[KEY_ID] = id;
objectInfo[KEY_DATA] = classInfoForObject(object);
m_wrappedObjects.insert(id, WrapInfo(object, objectInfo));
connect(object, SIGNAL(destroyed(QObject*)), SLOT(wrappedObjectDestroyed(QObject*)));
return objectInfo;
}
QObject *QtMetaObjectPublisher::unwrapObject(const QString& id) const
{
const WrapMapCIt& p = m_wrappedObjects.constFind(id);
if (p != m_wrappedObjects.constEnd())
return p.value().first;
return 0;
}
void QtMetaObjectPublisher::wrappedObjectDestroyed(QObject* object)
{
const QString& id = objectId(object);
m_wrappedObjects.remove(id);
emit wrappedObjectDestroyed(id);
}
void QtMetaObjectPublisher::deleteWrappedObject(QObject* object) const
{
if (!m_wrappedObjects.contains(objectId(object))) {
qWarning() << "Not deleting non-wrapped object" << object;
return;
}
object->deleteLater();
}
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