/*  
 * grid.c - grid layout
 *
 * Copyright © 2007 Julien Danjou <julien@danjou.info> 
 * Copyright © 2007 Alexandru E. Ungur <grid@rb.no-ip.biz>
 * 
 * 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, write to the Free Software Foundation, Inc., 
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 
 * 
 */

#include "awesome.h"
#include "grid.h"
#include "layout.h"
#include "tag.h"

extern Client *clients;         /* global client list and stack */

void
grid(Display *disp, awesome_config *awesomeconf)
{
    unsigned int i, n, cx, cy, cw, ch, aw, ah, cols, rows;
    int waw = get_windows_area_width(disp, awesomeconf->statusbar);
    int wah = get_windows_area_height(disp, awesomeconf->statusbar);
    Client *c;

    for(n = 0, c = clients; c; c = c->next)
        if(IS_TILED(c, awesomeconf->selected_tags, awesomeconf->ntags))
            n++;

    /* grid dimensions */
    for(rows = 0; rows <= n / 2; rows++)
        if(rows * rows >= n)
            break;
    cols = (rows && (rows - 1) * rows >= n) ? rows - 1 : rows;

    /* window geoms (cell height/width) */
    ch = wah / (rows ? rows : 1);
    cw = waw / (cols ? cols : 1);

    for(i = 0, c = clients; c; c = c->next)
    {
        if(!IS_TILED(c, awesomeconf->selected_tags, awesomeconf->ntags))
            continue;
        c->ismax = False;
        cx = (i / rows) * cw;
        cy = (i % rows) * ch + (awesomeconf->statusbar.position == BarTop ? awesomeconf->statusbar.height : 0);   // bh? adjust
        /* adjust height/width of last row/column's windows */
        ah = ((i + 1) % rows == 0) ? wah - ch * rows : 0;
        aw = (i >= rows * (cols - 1)) ? waw - cw * cols : 0;
        resize(c, cx, cy, cw - 2 * c->border + aw, ch - 2 * c->border + ah, False);
        i++;
    }
}