/* This file is part of the KDE project
 *
 * Copyright (C) 2008 Bernhard Beschow <bbeschow AT cs DOT tu-berlin DOT de>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */
#include "khtmlviewbar.h"

#include "khtmlview.h"
#include "khtmlviewbarwidget.h"

#include "khtml_debug.h"

#include <QBoxLayout>
#include <QKeyEvent>

KHTMLViewBar::KHTMLViewBar(Position position, KHTMLView *view, QWidget *parent) :
    QWidget(parent),
    m_view(view),
    m_permanentBarWidget(nullptr)
{
    const QBoxLayout::Direction direction = (position == Top ? QBoxLayout::TopToBottom : QBoxLayout::BottomToTop);

    setLayout(new QBoxLayout(direction, this));
    layout()->setContentsMargins(0, 0, 0, 0);
    layout()->setSpacing(0);
}

void KHTMLViewBar::addBarWidget(KHTMLViewBarWidget *newBarWidget)
{
    if (hasWidget(newBarWidget)) {
        // qCDebug(KHTML_LOG) << "this bar widget is already added";
        return;
    }
    // add new widget, invisible...
    newBarWidget->hide();
    layout()->addWidget(newBarWidget);
    connect(newBarWidget, SIGNAL(hideMe()), SLOT(hideCurrentBarWidget()));

    // qCDebug(KHTML_LOG) << "add barwidget " << newBarWidget;
}

void KHTMLViewBar::addPermanentBarWidget(KHTMLViewBarWidget *barWidget)
{
    // remove old widget from layout (if any)
    if (m_permanentBarWidget) {
        m_permanentBarWidget->hide();
        layout()->removeWidget(m_permanentBarWidget);
    }

    layout()->addWidget(barWidget /*, 0, Qt::AlignBottom*/);  // FIXME
    m_permanentBarWidget = barWidget;
    m_permanentBarWidget->show();

    setViewBarVisible(true);
}

void KHTMLViewBar::removePermanentBarWidget(KHTMLViewBarWidget *barWidget)
{
    if (m_permanentBarWidget != barWidget) {
        // qCDebug(KHTML_LOG) << "no such permanent widget exists in bar";
        return;
    }

    if (!m_permanentBarWidget) {
        return;
    }

    m_permanentBarWidget->hide();
    layout()->removeWidget(m_permanentBarWidget);
    m_permanentBarWidget = nullptr;
}

bool KHTMLViewBar::hasPermanentWidget(KHTMLViewBarWidget *barWidget) const
{
    return (m_permanentBarWidget == barWidget);
}

void KHTMLViewBar::showBarWidget(KHTMLViewBarWidget *barWidget)
{
    // raise correct widget
// TODO  m_stack->setCurrentWidget (barWidget);
    barWidget->show();

    // if we have any permanent widget, bar is always visible,
    // no need to show it
    if (!m_permanentBarWidget) {
        setViewBarVisible(true);
    }
}

bool KHTMLViewBar::hasWidget(KHTMLViewBarWidget *wid) const
{
    Q_UNUSED(wid);
    return layout()->count() != 0;
}

void KHTMLViewBar::hideCurrentBarWidget()
{
//  m_stack->hide();

    // if we have any permanent widget, bar is always visible,
    // no need to hide it
    if (!m_permanentBarWidget) {
        setViewBarVisible(false);
    }

    m_view->setFocus();
    // qCDebug(KHTML_LOG)<<"hide barwidget";
}

void KHTMLViewBar::setViewBarVisible(bool visible)
{
    setVisible(visible);
}

void KHTMLViewBar::keyPressEvent(QKeyEvent *event)
{
    if (event->key() == Qt::Key_Escape) {
        hideCurrentBarWidget();
        return;
    }
    QWidget::keyPressEvent(event);

}

void KHTMLViewBar::hideEvent(QHideEvent *event)
{
    Q_UNUSED(event);
//   if (!event->spontaneous())
//     m_view->setFocus();
}
