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/*
propertysyncer.cpp
This file is part of GammaRay, the Qt application inspection and manipulation tool.
SPDX-FileCopyrightText: 2015 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.com>
Author: Volker Krause <volker.krause@kdab.com>
SPDX-License-Identifier: GPL-2.0-or-later
Contact KDAB at <info@kdab.com> for commercial licensing options.
*/
#include "propertysyncer.h"
#include "message.h"
#include <QDebug>
#include <QMetaProperty>
#include <algorithm>
using namespace GammaRay;
static int qobjectPropertyOffset()
{
return QObject::staticMetaObject.propertyCount();
}
PropertySyncer::PropertySyncer(QObject *parent)
: QObject(parent)
, m_address(Protocol::InvalidObjectAddress)
, m_initialSync(false)
{
}
PropertySyncer::~PropertySyncer() = default;
void PropertySyncer::setRequestInitialSync(bool initialSync)
{
m_initialSync = initialSync;
}
void PropertySyncer::addObject(Protocol::ObjectAddress addr, QObject *obj)
{
Q_ASSERT(addr != Protocol::InvalidObjectAddress);
Q_ASSERT(obj);
if (qobjectPropertyOffset() == obj->metaObject()->propertyCount())
return; // no properties we could sync
for (int i = qobjectPropertyOffset(); i < obj->metaObject()->propertyCount(); ++i) {
const auto prop = obj->metaObject()->property(i);
if (!prop.hasNotifySignal())
continue;
const QByteArray ba = QByteArray("2") + prop.notifySignal().methodSignature();
connect(obj, ba, this, SLOT(propertyChanged()));
}
connect(obj, &QObject::destroyed, this, &PropertySyncer::objectDestroyed);
ObjectInfo info;
info.addr = addr;
info.obj = obj;
info.recursionLock = false;
info.enabled = false;
m_objects.push_back(info);
}
void PropertySyncer::setObjectEnabled(Protocol::ObjectAddress addr, bool enabled)
{
const auto it = std::find_if(m_objects.begin(), m_objects.end(), [addr](const ObjectInfo &info) {
return info.addr == addr;
});
if (it == m_objects.end() || (*it).enabled == enabled)
return;
(*it).enabled = enabled;
if (enabled && m_initialSync) {
Message msg(m_address, Protocol::PropertySyncRequest);
msg << addr;
emit message(msg);
}
}
Protocol::ObjectAddress PropertySyncer::address() const
{
return m_address;
}
void PropertySyncer::setAddress(Protocol::ObjectAddress addr)
{
m_address = addr;
}
void PropertySyncer::handleMessage(const GammaRay::Message &msg)
{
Q_ASSERT(msg.address() == m_address);
switch (msg.type()) {
case Protocol::PropertySyncRequest: {
Protocol::ObjectAddress addr;
msg >> addr;
Q_ASSERT(addr != Protocol::InvalidObjectAddress);
const auto it = std::find_if(m_objects.constBegin(), m_objects.constEnd(),
[addr](const ObjectInfo &info) {
return info.addr == addr;
});
if (it == m_objects.constEnd())
break;
QVector<QPair<QByteArray, QVariant>> values;
const auto propCount = (*it).obj->metaObject()->propertyCount();
values.reserve(propCount);
for (int i = qobjectPropertyOffset(); i < propCount; ++i) {
const auto prop = (*it).obj->metaObject()->property(i);
values.push_back(qMakePair(QByteArray(prop.name()), prop.read((*it).obj)));
}
Q_ASSERT(!values.isEmpty());
Message msg(m_address, Protocol::PropertyValuesChanged);
msg << addr << ( quint32 )values.size();
for (const auto &value : std::as_const(values))
msg << value.first << value.second;
emit message(msg);
break;
}
case Protocol::PropertyValuesChanged: {
Protocol::ObjectAddress addr;
quint32 changeSize;
msg >> addr >> changeSize;
Q_ASSERT(addr != Protocol::InvalidObjectAddress);
Q_ASSERT(changeSize > 0);
auto it = std::find_if(m_objects.begin(), m_objects.end(), [addr](const ObjectInfo &info) {
return info.addr == addr;
});
if (it == m_objects.end())
break;
for (quint32 i = 0; i < changeSize; ++i) {
QByteArray propName;
QVariant propValue;
msg >> propName >> propValue;
(*it).recursionLock = true;
(*it).obj->setProperty(propName, propValue);
// it can be invalid if as a result of the above call new objects have been registered for example
it = std::find_if(m_objects.begin(), m_objects.end(), [addr](const ObjectInfo &info) {
return info.addr == addr;
});
Q_ASSERT(it != m_objects.end());
(*it).recursionLock = false;
}
break;
}
default:
Q_ASSERT_X(false, "PropertySyncer::handleMessage",
"Unexpected Gammaray::Message type encountered");
}
}
void PropertySyncer::propertyChanged()
{
const auto *obj = sender();
Q_ASSERT(obj);
const auto it = std::find_if(m_objects.constBegin(), m_objects.constEnd(), [obj](const ObjectInfo &info) {
return info.obj == obj;
});
Q_ASSERT(it != m_objects.constEnd());
if ((*it).recursionLock || !(*it).enabled)
return;
const auto sigIndex = senderSignalIndex();
QVector<QPair<QByteArray, QVariant>> changes;
for (int i = qobjectPropertyOffset(); i < obj->metaObject()->propertyCount(); ++i) {
const auto prop = obj->metaObject()->property(i);
if (prop.notifySignalIndex() != sigIndex)
continue;
changes.push_back(qMakePair(QByteArray(prop.name()), prop.read(obj)));
}
Q_ASSERT(!changes.isEmpty());
Message msg(m_address, Protocol::PropertyValuesChanged);
msg << (*it).addr << ( quint32 )changes.size();
for (const auto &change : std::as_const(changes))
msg << change.first << change.second;
emit message(msg);
}
void PropertySyncer::objectDestroyed(QObject *obj)
{
const auto it = std::find_if(m_objects.begin(), m_objects.end(), [obj](const ObjectInfo &info) {
return info.obj == obj;
});
Q_ASSERT(it != m_objects.end());
m_objects.erase(it);
}
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