/* See LICENSE file for copyright and license details. */

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

extern int wah, waw;            /* windowarea geometry */
extern Client *clients;         /* global client list and stack */
extern DC dc;

void
grid(Display *disp, jdwm_config *jdwmconf)
{
    unsigned int i, n, cx, cy, cw, ch, aw, ah, cols, rows;
    Client *c;

    for(n = 0, c = clients; c; c = c->next)
        if(IS_TILED(c, jdwmconf->selected_tags, jdwmconf->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(isvisible(c, jdwmconf->selected_tags, jdwmconf->ntags))
        {
            unban(c);
            if(c->isfloating)
                continue;
            c->ismax = False;
            cx = (i / rows) * cw;
            cy = (i % rows) * ch + (jdwmconf->statusbar.position == BarTop ? jdwmconf->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++;
        }
        else
            ban(c);
    focus(disp, &dc, NULL, True, jdwmconf);
    restack(disp, jdwmconf);
}