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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qqmlwatcher.h"
#include "qqmlexpression.h"
#include "qqmlcontext.h"
#include "qqml.h"
#include <private/qqmldebugservice_p.h>
#include <private/qqmlproperty_p.h>
#include <private/qqmlvaluetype_p.h>
#include <QtCore/qmetaobject.h>
#include <QtCore/qdebug.h>
QT_BEGIN_NAMESPACE
class QQmlWatchProxy : public QObject
{
Q_OBJECT
public:
QQmlWatchProxy(int id,
QObject *object,
int debugId,
const QMetaProperty &prop,
QQmlWatcher *parent = nullptr);
QQmlWatchProxy(int id,
QQmlExpression *exp,
int debugId,
QQmlWatcher *parent = nullptr);
public slots:
void notifyValueChanged(); // Needs to be a slot because of QQmlPropertyPrivate::connect()
private:
friend class QQmlWatcher;
int m_id;
QQmlWatcher *m_watch;
QObject *m_object;
int m_debugId;
QMetaProperty m_property;
QQmlExpression *m_expr;
};
QQmlWatchProxy::QQmlWatchProxy(int id, QQmlExpression *exp, int debugId, QQmlWatcher *parent)
: QObject(parent),
m_id(id),
m_watch(parent),
m_object(nullptr),
m_debugId(debugId),
m_expr(exp)
{
QObject::connect(m_expr, &QQmlExpression::valueChanged,
this, &QQmlWatchProxy::notifyValueChanged);
}
QQmlWatchProxy::QQmlWatchProxy(int id, QObject *object, int debugId, const QMetaProperty &prop,
QQmlWatcher *parent)
: QObject(parent),
m_id(id),
m_watch(parent),
m_object(object),
m_debugId(debugId),
m_property(prop),
m_expr(nullptr)
{
static int refreshIdx = -1;
if(refreshIdx == -1)
refreshIdx = QQmlWatchProxy::staticMetaObject.indexOfMethod("notifyValueChanged()");
if (prop.hasNotifySignal())
QQmlPropertyPrivate::connect(m_object, prop.notifySignalIndex(), this, refreshIdx);
}
void QQmlWatchProxy::notifyValueChanged()
{
QVariant v;
if (m_expr)
v = m_expr->evaluate();
else
v = m_property.read(m_object);
emit m_watch->propertyChanged(m_id, m_debugId, m_property, v);
}
QQmlWatcher::QQmlWatcher(QObject *parent)
: QObject(parent)
{
}
bool QQmlWatcher::addWatch(int id, quint32 debugId)
{
QObject *object = QQmlDebugService::objectForId(debugId);
if (object) {
int propCount = object->metaObject()->propertyCount();
for (int ii=0; ii<propCount; ii++)
addPropertyWatch(id, object, debugId, object->metaObject()->property(ii));
return true;
}
return false;
}
bool QQmlWatcher::addWatch(int id, quint32 debugId, const QByteArray &property)
{
QObject *object = QQmlDebugService::objectForId(debugId);
if (object) {
int index = object->metaObject()->indexOfProperty(property.constData());
if (index >= 0) {
addPropertyWatch(id, object, debugId, object->metaObject()->property(index));
return true;
}
}
return false;
}
bool QQmlWatcher::addWatch(int id, quint32 objectId, const QString &expr)
{
QObject *object = QQmlDebugService::objectForId(objectId);
QQmlContext *context = qmlContext(object);
if (context) {
QQmlExpression *exprObj = new QQmlExpression(context, object, expr);
exprObj->setNotifyOnValueChanged(true);
QQmlWatchProxy *proxy = new QQmlWatchProxy(id, exprObj, objectId, this);
exprObj->setParent(proxy);
m_proxies[id].append(proxy);
proxy->notifyValueChanged();
return true;
}
return false;
}
bool QQmlWatcher::removeWatch(int id)
{
if (!m_proxies.contains(id))
return false;
QList<QPointer<QQmlWatchProxy> > proxies = m_proxies.take(id);
qDeleteAll(proxies);
return true;
}
void QQmlWatcher::addPropertyWatch(int id, QObject *object, quint32 debugId, const QMetaProperty &property)
{
QQmlWatchProxy *proxy = new QQmlWatchProxy(id, object, debugId, property, this);
m_proxies[id].append(proxy);
proxy->notifyValueChanged();
}
QT_END_NAMESPACE
#include <qqmlwatcher.moc>
#include "moc_qqmlwatcher.cpp"
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