/*
  actionvalidator.cpp

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

  Copyright (C) 2012-2017 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com
  Author: Kevin Funk <kevin.funk@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 "actionvalidator.h"

#include <QAction>

using namespace GammaRay;

QT_BEGIN_NAMESPACE
uint qHash(const QKeySequence &sequence)
{
    return qHash(sequence.toString(QKeySequence::PortableText));
}

QT_END_NAMESPACE

ActionValidator::ActionValidator(QObject *parent)
    : QObject(parent)
{
}

QList<QAction *> ActionValidator::actions() const
{
    return m_shortcutActionMap.values();
}

QList<QAction *> ActionValidator::actions(const QKeySequence &sequence) const
{
    return m_shortcutActionMap.values(sequence);
}

void ActionValidator::setActions(const QList<QAction *> &actions)
{
    clearActions();

    m_shortcutActionMap.reserve(actions.size());
    Q_FOREACH(QAction *action, actions) {
        insert(action);
    }
}

void ActionValidator::clearActions()
{
    m_shortcutActionMap.clear();
}

void ActionValidator::insert(QAction *action)
{
    Q_ASSERT(action);

    Q_FOREACH(const QKeySequence &sequence, action->shortcuts()) {
        if (m_shortcutActionMap.values(sequence).contains(action))
            continue;

        m_shortcutActionMap.insertMulti(sequence, action);
    }

    // also track object destruction
    connect(action, SIGNAL(destroyed(QObject*)),
            SLOT(handleActionDestroyed(QObject*)));
}

void ActionValidator::remove(QAction *action)
{
    Q_ASSERT(action);

    safeRemove(action);
}

void ActionValidator::safeRemove(QAction *action)
{
    Q_FOREACH(const QKeySequence &sequence, m_shortcutActionMap.keys()) {
        if (!m_shortcutActionMap.values(sequence).contains(action))
            continue;

        QList<QAction *> oldValues = m_shortcutActionMap.values(sequence);
        const bool success = oldValues.removeOne(action);
        Q_UNUSED(success);
        Q_ASSERT(success);
        m_shortcutActionMap[sequence] = action;
    }
}

void ActionValidator::handleActionDestroyed(QObject *object)
{
    QAction *action = static_cast<QAction *>(object);

    safeRemove(action);
}

bool ActionValidator::hasAmbiguousShortcut(const QAction *action) const
{
    if (!action)
        return false;

    Q_FOREACH(const QKeySequence &sequence, action->shortcuts()) {
        if (m_shortcutActionMap.count(sequence) > 1)
            return true;
    }
    return false;
}
