/*
  inboundconnectionsmodel.cpp

  This file is part of GammaRay, the Qt application inspection and
  manipulation tool.

  Copyright (C) 2014-2018 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com
  Author: Volker Krause <volker.krause@kdab.com>

  Licensees holding valid commercial KDAB GammaRay licenses may use this file in
  accordance with GammaRay Commercial License Agreement provided with the Software.

  Contact info@kdab.com if any conditions of this licensing are not clear to you.

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <config-gammaray.h>
#include "inboundconnectionsmodel.h"
#include "core/probe.h"

#ifdef HAVE_PRIVATE_QT_HEADERS
#include <private/qobject_p.h>
#endif

using namespace GammaRay;

InboundConnectionsModel::InboundConnectionsModel(QObject *parent)
    : AbstractConnectionsModel(parent)
{
}

InboundConnectionsModel::~InboundConnectionsModel()
{
}

#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0) && defined(HAVE_PRIVATE_QT_HEADERS)
static int signalIndexForConnection(QObjectPrivate::Connection *connection, QObject *sender)
{
    QObjectPrivate *d = QObjectPrivate::get(sender);
    if (!d->connectionLists)
        return -1;

    // HACK: the declaration of d->connectionsLists is not accessible for us...
    const QVector<QObjectPrivate::ConnectionList> *cl
        = reinterpret_cast<QVector<QObjectPrivate::ConnectionList> *>(d->connectionLists);
    for (int signalIndex = 0; signalIndex < cl->count(); ++signalIndex) {
        const QObjectPrivate::Connection *c = cl->at(signalIndex).first;
        while (c) {
            if (c == connection)
                return signalIndex;
            c = c->nextConnectionList;
            continue;
        }
    }

    return -1;
}

#endif

void InboundConnectionsModel::setObject(QObject *object)
{
    clear();
    m_object = object;
    if (!object)
        return;

    QVector<Connection> connections;
#ifdef HAVE_PRIVATE_QT_HEADERS
    QObjectPrivate *d = QObjectPrivate::get(object);
    if (d->senders) {
        for (QObjectPrivate::Connection *s = d->senders; s; s = s->next) {
            if (!s->sender || Probe::instance()->filterObject(s->sender))
                continue;

            Connection conn;
            conn.endpoint = s->sender;
#if QT_VERSION >= QT_VERSION_CHECK(5, 0, 0)
            conn.signalIndex = signalIndexToMethodIndex(s->sender, s->signal_index);
            if (s->isSlotObject)
                conn.slotIndex = -1;
            else
                conn.slotIndex = s->method();

#else
            conn.slotIndex = s->method();
            conn.signalIndex
                = signalIndexToMethodIndex(s->sender, signalIndexForConnection(s, s->sender));
#endif
            conn.type = s->connectionType;
            connections.push_back(conn);
        }
    }
#endif
    setConnections(connections);
}

QVariant InboundConnectionsModel::data(const QModelIndex &index, int role) const
{
    if (!index.isValid() || !m_object)
        return QVariant();

    if (role == Qt::DisplayRole) {
        const Connection &conn = m_connections.at(index.row());
        switch (index.column()) {
        case 0:
            return displayString(conn.endpoint);
        case 1:
            return displayString(conn.endpoint, conn.signalIndex);
        case 2:
            if (conn.slotIndex < 0)
                return tr("<slot object context>");
            return displayString(m_object, conn.slotIndex);
        }
    }

    return AbstractConnectionsModel::data(index, role);
}

QVariant InboundConnectionsModel::headerData(int section, Qt::Orientation orientation,
                                             int role) const
{
    if (orientation == Qt::Horizontal && role == Qt::DisplayRole) {
        switch (section) {
        case 0:
            return tr("Sender");
        case 1:
            return tr("Signal");
        case 2:
            return tr("Slot");
        }
    }
    return AbstractConnectionsModel::headerData(section, orientation, role);
}
