/*
 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "WindowList.h"

WindowList& WindowList::the()
{
    static WindowList* s_the;
    if (!s_the)
        s_the = new WindowList;
    return *s_the;
}

Window* WindowList::find_parent(const Window& window)
{
   if (!window.parent_identifier().is_valid())
       return nullptr;
   for (auto& it : m_windows)
   {
       auto& w = *it.value;
       if (w.identifier() == window.parent_identifier())
           return &w;
   }
   return nullptr;
}

Window* WindowList::window(const WindowIdentifier& identifier)
{
    auto it = m_windows.find(identifier);
    if (it != m_windows.end())
        return it->value;
    return nullptr;
}

Window& WindowList::ensure_window(const WindowIdentifier& identifier)
{
    auto it = m_windows.find(identifier);
    if (it != m_windows.end())
        return *it->value;
    auto window = make<Window>(identifier);
    auto& window_ref = *window;
    m_windows.set(identifier, move(window));
    return window_ref;
}

void WindowList::remove_window(const WindowIdentifier& identifier)
{
    m_windows.remove(identifier);
}