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Change the way the grid is stored, previously it was:

- a two-dimensional array of cells;
- a two-dimensional array of utf8 data;
- an array of line lengths.

Now it is a single array of a new struct grid_line each of which represents a
line and containts the length and an array of cells and an array of utf8 data.

This will make it easier to add additional per-line members, such as flags.

/* $OpenBSD: cmd-list-windows.c,v 1.5 2009/08/08 13:29:27 nicm Exp $ */

/*
 * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>

#include <unistd.h>

#include "tmux.h"

/*
 * List windows on given session.
 */

int	cmd_list_windows_exec(struct cmd *, struct cmd_ctx *);

const struct cmd_entry cmd_list_windows_entry = {
	"list-windows", "lsw",
	CMD_TARGET_SESSION_USAGE,
	0, 0,
	cmd_target_init,
	cmd_target_parse,
	cmd_list_windows_exec,
	cmd_target_free,
	cmd_target_print
};

int
cmd_list_windows_exec(struct cmd *self, struct cmd_ctx *ctx)
{
	struct cmd_target_data	*data = self->data;
	struct session		*s;
	struct winlink		*wl;
	struct window		*w;
	struct window_pane	*wp;
	struct grid		*gd;
	struct grid_line	*gl;
	u_int			 i;
	unsigned long long	 size;
	const char		*name;

	if ((s = cmd_find_session(ctx, data->target)) == NULL)
		return (-1);

	RB_FOREACH(wl, winlinks, &s->windows) {
		w = wl->window;
		ctx->print(ctx,
		    "%3d: %s [%ux%u]", wl->idx, w->name, w->sx, w->sy);

		TAILQ_FOREACH(wp, &w->panes, entry) {
			gd = wp->base.grid;

			size = 0;
			for (i = 0; i < gd->hsize; i++) {
				gl = &gd->linedata[i];
				size += gl->cellsize * sizeof *gl->celldata;
				size += gl->utf8size * sizeof *gl->utf8data;
			}
			size += gd->hsize * sizeof *gd->linedata;

			if (wp->fd != -1)
				name = ttyname(wp->fd);
			else
				name = "unknown";
			ctx->print(ctx,
			    "     %s [%ux%u] [history %u/%u, %llu bytes]",
			    name, wp->sx, wp->sy, gd->hsize, gd->hlimit, size);
		}
	}

	return (0);
}