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

Copyright (C) 2006 Lubos Lunak <l.lunak@kde.org>

You can Freely distribute this program under the GNU General Public
License. See the file "COPYING" for the exact licensing terms.
******************************************************************/

#include "scene_basic.h"
#include "client.h"

#include <X11/extensions/shape.h>

namespace KWinInternal
{

//****************************************
// Scene
//****************************************

Scene* scene;

Scene::Scene( Workspace* ws )
    : wspace( ws )
    {
    }
    
Scene::~Scene()
    {
    }
    
void Scene::windowGeometryShapeChanged( Toplevel* )
    {
    }

void Scene::windowOpacityChanged( Toplevel* )
    {
    }

void Scene::windowAdded( Toplevel* )
    {
    }

void Scene::windowDeleted( Toplevel* )
    {
    }

Scene::Window::Window( Toplevel * c )
    : toplevel( c )
    , shape_valid( false )
    {
    }

void Scene::Window::discardShape()
    {
    shape_valid = false;
    }

QRegion Scene::Window::shape() const
    {
    if( !shape_valid )
        {
        Client* c = dynamic_cast< Client* >( toplevel );
        if( toplevel->shape() || ( c != NULL && !c->mask().isEmpty()))
            {
            int count, order;
            XRectangle* rects = XShapeGetRectangles( display(), toplevel->handle(),
                ShapeBounding, &count, &order );
            if(rects)
                {
                shape_region = QRegion();
                for( int i = 0;
                     i < count;
                     ++i )
                    shape_region += QRegion( rects[ i ].x, rects[ i ].y,
                        rects[ i ].width, rects[ i ].height );
                XFree(rects);
                }
            else
                shape_region = QRegion( 0, 0, width(), height());
            }
        else
            shape_region = QRegion( 0, 0, width(), height());
        shape_valid = true;
        }
    return shape_region;
    }

bool Scene::Window::isVisible() const
    {
    // TODO mapping state?
    return !toplevel->geometry()
        .intersect( QRect( 0, 0, displayWidth(), displayHeight()))
        .isEmpty();
    }

bool Scene::Window::isOpaque() const
    {
    return toplevel->opacity() == 1.0 && !toplevel->hasAlpha();
    }

} // namespace