/*
 * Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include "Selection.h"
#include "ImageEditor.h"
#include <LibGfx/Painter.h>

namespace PixelPaint {

Selection::Selection(Image& image)
    : m_image(image)
{
}

void Selection::clear()
{
    m_mask = {};
    for (auto* client : m_clients)
        client->selection_did_change();
}

void Selection::invert()
{
    auto new_mask = Mask::full(m_image.rect());
    new_mask.subtract(m_mask);
    m_mask = new_mask;
}

void Selection::merge(Mask const& mask, MergeMode mode)
{
    VERIFY(m_image.rect().contains(mask.bounding_rect()));

    switch (mode) {
    case MergeMode::Set:
        m_mask = mask;
        break;
    case MergeMode::Add:
        m_mask.add(mask);
        break;
    case MergeMode::Subtract:
        m_mask.subtract(mask);
        break;
    case MergeMode::Intersect:
        m_mask.intersect(mask);
        break;
    default:
        VERIFY_NOT_REACHED();
    }
}

void Selection::add_client(SelectionClient& client)
{
    VERIFY(!m_clients.contains(&client));
    m_clients.set(&client);
}

void Selection::remove_client(SelectionClient& client)
{
    VERIFY(m_clients.contains(&client));
    m_clients.remove(&client);
}

void Selection::set_mask(Mask mask)
{
    m_mask = move(mask);
}

}