#include <u.h>
#include <libn.h>

#include "term.h"

typedef struct Rect   Rect;

struct Rect
{
    int top, left, rows, cols;
};

struct Window
{
    Buffer  buffer[2], *buf;
    Rect    area;         /* on screen */
    Pen     pen, spen;    /* current and saved pen */
    uint    curvis : 1;
    uint    damage : 1;
};

/* functions */

Window *
makewindow(Window *root, Rect area, int history)
{
    Window *w;
    w = calloc(1, sizeof(*w));
    if (!w)
        panicf("out of memory");

	w->pen = (Pen) {
        .state = PenNormal,
        .col   = {-1, -1}, 
    };

	if (!binit(w->buffer+0, area.rows, area.cols, history) ||
	    !binit(w->buffer+1, area.rows, area.cols, 0)) {
		free(w);
		return nil;
	}
	w->buf = w->buffer;
    return w;
}