/********************************************************************
 KWin - the KDE window manager
 This file is part of the KDE project.

Copyright (C) 2009 Nikhil Marathe <nsm.nikhil@gmail.com>

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 "tile.h"

#include <assert.h>

#include <QQueue>

#include "client.h"
#include "workspace.h"

namespace KWin
{

Tile::Tile( Client *c, const QRect& area)
    : m_client(c),
      m_floating(false)
    {
    setGeometry(area);
    if( c )
        {
        m_prevGeom = c->geometry();
        }
    if( c && !c->isResizable() )
        floatTile();
    }

/*
 * NOTE: Why isn't left/right/parent copied?
 * Because they might be deleted at any point, so we can't keep pointers to them
 * Also it doesn't make sense in the areas where copy is actually going to be used.
 * Since we will be getting a new parent and children.
 */
Tile::Tile( const Tile& orig )
    : m_client( orig.client() ),
      m_prevGeom( orig.m_prevGeom ),
      m_floating( orig.floating() )
    {
    setGeometry( orig.geometry() );
    }

Tile::~Tile()
    {
    restorePreviousGeometry();

    m_client = NULL;
    }

void Tile::commit()
    {
            m_client->setGeometry(geometry(), ForceGeometrySet);
        }

void Tile::setGeometry(int x, int y, int w, int h)
    {
    QRect old = m_geom;
    m_geom.setTopLeft( QPoint(x, y) );
    m_geom.setWidth( w );
    m_geom.setHeight( h );

    if( old == m_geom )
        return;

    if( floating() )
        m_prevGeom = m_geom;

    }

void Tile::floatTile()
    {
    if( floating() ) return;

    // note, order of setting m_floating to true
    // then calling restore is important
    // childGeometryChanged will check for ignoreGeometry()
    m_floating = true;

    restorePreviousGeometry();

    commit();
    client()->workspace()->notifyTilingWindowActivated( client() );
    // TODO: notify layout manager
    }

void Tile::unfloatTile()
    {
    if( !floating() ) return;

    m_floating = false;
    m_prevGeom = m_client->geometry();

    setGeometry( m_client->workspace()->clientArea( PlacementArea, m_client ) );
    commit();
    // TODO: notify layout manager

    }

void Tile::restorePreviousGeometry()
    {
    // why this check?
    // sometimes we remove a Tile, but don't want to remove the children
    // so the children are set to NULL. In this case leaf() will return
    // true but m_client will still be null
    if( !m_client ) return;
    if( m_prevGeom.isNull() )
        {
        QRect area = m_client->workspace()->clientArea( PlacementArea, m_client );
        m_client->workspace()->place( m_client, area );
        }
    else
        {
        m_client->setGeometry( m_prevGeom, ForceGeometrySet );
        }
    setGeometry( m_client->geometry() );
    }

bool Tile::minimized() const
    {
    return m_client->isMinimized();
    }

void Tile::focus()
    {
    m_client->workspace()->activateClient( m_client, true );
    }

void Tile::dumpTile(const QString& indent ) const
    {
    kDebug(1212) << indent << m_client
                  << ( floating() ? "floating" : "not floating" )
                  << ( ignoreGeometry() ? "ignored" : "tiled" ) 
                  << m_geom ;
    }
}