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Rewrite of tmux mouse support which was a mess. Instead of having
options for "mouse-this" and "mouse-that", mouse events may be bound as
keys and there is one option "mouse" that turns on mouse support
entirely (set -g mouse on).

See the new MOUSE SUPPORT section of the man page for description of the
key names and new flags (-t= to specify the pane or window under mouse
as a target, and send-keys -M to pass through a mouse event).

The default builtin bindings for the mouse are:

    bind -n   MouseDown1Pane select-pane -t=; send-keys -M
    bind -n MouseDown1Status select-window -t=
    bind -n   MouseDrag1Pane copy-mode -M
    bind -n MouseDrag1Border resize-pane -M

To get the effect of turning mode-mouse off, do:

    unbind -n MouseDrag1Pane
    unbind -temacs-copy MouseDrag1Pane

The old mouse options are now gone, set-option -q may be used to
suppress warnings if mixing configuration files.

/* $OpenBSD: window-clock.c,v 1.11 2015/04/19 21:34:21 nicm Exp $ */

/*
 * Copyright (c) 2009 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 <stdlib.h>
#include <string.h>
#include <time.h>

#include "tmux.h"

struct screen *window_clock_init(struct window_pane *);
void	window_clock_free(struct window_pane *);
void	window_clock_resize(struct window_pane *, u_int, u_int);
void	window_clock_key(struct window_pane *, struct client *,
	    struct session *, int, struct mouse_event *);
void	window_clock_timer(struct window_pane *);

void	window_clock_draw_screen(struct window_pane *);

const struct window_mode window_clock_mode = {
	window_clock_init,
	window_clock_free,
	window_clock_resize,
	window_clock_key,
	window_clock_timer,
};

struct window_clock_mode_data {
	struct screen	        screen;
	time_t			tim;
};

const char window_clock_table[14][5][5] = {
	{ { 1,1,1,1,1 }, /* 0 */
	  { 1,0,0,0,1 },
	  { 1,0,0,0,1 },
	  { 1,0,0,0,1 },
	  { 1,1,1,1,1 } },
	{ { 0,0,0,0,1 }, /* 1 */
	  { 0,0,0,0,1 },
	  { 0,0,0,0,1 },
	  { 0,0,0,0,1 },
	  { 0,0,0,0,1 } },
	{ { 1,1,1,1,1 }, /* 2 */
	  { 0,0,0,0,1 },
	  { 1,1,1,1,1 },
	  { 1,0,0,0,0 },
	  { 1,1,1,1,1 } },
	{ { 1,1,1,1,1 }, /* 3 */
	  { 0,0,0,0,1 },
	  { 1,1,1,1,1 },
	  { 0,0,0,0,1 },
	  { 1,1,1,1,1 } },
	{ { 1,0,0,0,1 }, /* 4 */
	  { 1,0,0,0,1 },
	  { 1,1,1,1,1 },
	  { 0,0,0,0,1 },
	  { 0,0,0,0,1 } },
	{ { 1,1,1,1,1 }, /* 5 */
	  { 1,0,0,0,0 },
	  { 1,1,1,1,1 },
	  { 0,0,0,0,1 },
	  { 1,1,1,1,1 } },
	{ { 1,1,1,1,1 }, /* 6 */
	  { 1,0,0,0,0 },
	  { 1,1,1,1,1 },
	  { 1,0,0,0,1 },
	  { 1,1,1,1,1 } },
	{ { 1,1,1,1,1 }, /* 7 */
	  { 0,0,0,0,1 },
	  { 0,0,0,0,1 },
	  { 0,0,0,0,1 },
	  { 0,0,0,0,1 } },
	{ { 1,1,1,1,1 }, /* 8 */
	  { 1,0,0,0,1 },
	  { 1,1,1,1,1 },
	  { 1,0,0,0,1 },
	  { 1,1,1,1,1 } },
	{ { 1,1,1,1,1 }, /* 9 */
	  { 1,0,0,0,1 },
	  { 1,1,1,1,1 },
	  { 0,0,0,0,1 },
	  { 1,1,1,1,1 } },
	{ { 0,0,0,0,0 }, /* : */
	  { 0,0,1,0,0 },
	  { 0,0,0,0,0 },
	  { 0,0,1,0,0 },
	  { 0,0,0,0,0 } },
	{ { 1,1,1,1,1 }, /* A */
	  { 1,0,0,0,1 },
	  { 1,1,1,1,1 },
	  { 1,0,0,0,1 },
	  { 1,0,0,0,1 } },
	{ { 1,1,1,1,1 }, /* P */
	  { 1,0,0,0,1 },
	  { 1,1,1,1,1 },
	  { 1,0,0,0,0 },
	  { 1,0,0,0,0 } },
	{ { 1,0,0,0,1 }, /* M */
	  { 1,1,0,1,1 },
	  { 1,0,1,0,1 },
	  { 1,0,0,0,1 },
	  { 1,0,0,0,1 } },
};

struct screen *
window_clock_init(struct window_pane *wp)
{
	struct window_clock_mode_data	*data;
	struct screen			*s;

	wp->modedata = data = xmalloc(sizeof *data);
	data->tim = time(NULL);

	s = &data->screen;
	screen_init(s, screen_size_x(&wp->base), screen_size_y(&wp->base), 0);
	s->mode &= ~MODE_CURSOR;

	window_clock_draw_screen(wp);

	return (s);
}

void
window_clock_free(struct window_pane *wp)
{
	struct window_clock_mode_data	*data = wp->modedata;

	screen_free(&data->screen);
	free(data);
}

void
window_clock_resize(struct window_pane *wp, u_int sx, u_int sy)
{
	struct window_clock_mode_data	*data = wp->modedata;
	struct screen			*s = &data->screen;

	screen_resize(s, sx, sy, 0);
	window_clock_draw_screen(wp);
}

void
window_clock_key(struct window_pane *wp, unused struct client *c,
    unused struct session *sess, unused int key, unused struct mouse_event *m)
{
	window_pane_reset_mode(wp);
}

void
window_clock_timer(struct window_pane *wp)
{
	struct window_clock_mode_data	*data = wp->modedata;
	struct tm			 now, then;
	time_t				 t;

	t = time(NULL);
	gmtime_r(&t, &now);
	gmtime_r(&data->tim, &then);
	if (now.tm_min == then.tm_min)
		return;
	data->tim = t;

	window_clock_draw_screen(wp);
	server_redraw_window(wp->window);
}

void
window_clock_draw_screen(struct window_pane *wp)
{
	struct window_clock_mode_data	*data = wp->modedata;
	struct screen_write_ctx	 	 ctx;
	int				 colour, style;
	struct screen			*s = &data->screen;
	struct grid_cell		 gc;
	char				 tim[64], *ptr;
	time_t				 t;
	struct tm			*tm;
	u_int				 i, j, x, y, idx;

	colour = options_get_number(&wp->window->options, "clock-mode-colour");
	style = options_get_number(&wp->window->options, "clock-mode-style");

	screen_write_start(&ctx, NULL, s);

	t = time(NULL);
	tm = localtime(&t);
	if (style == 0) {
		strftime(tim, sizeof tim, "%l:%M ", localtime(&t));
		if (tm->tm_hour >= 12)
			strlcat(tim, "PM", sizeof tim);
		else
			strlcat(tim, "AM", sizeof tim);
	} else
		strftime(tim, sizeof tim, "%H:%M", tm);

	screen_write_clearscreen(&ctx);

	if (screen_size_x(s) < 6 * strlen(tim) || screen_size_y(s) < 6) {
		if (screen_size_x(s) >= strlen(tim) && screen_size_y(s) != 0) {
			x = (screen_size_x(s) / 2) - (strlen(tim) / 2);
			y = screen_size_y(s) / 2;
			screen_write_cursormove(&ctx, x, y);

			memcpy(&gc, &grid_default_cell, sizeof gc);
			colour_set_fg(&gc, colour);
			screen_write_puts(&ctx, &gc, "%s", tim);
		}


		screen_write_stop(&ctx);
		return;
	}

	x = (screen_size_x(s) / 2) - 3 * strlen(tim);
	y = (screen_size_y(s) / 2) - 3;

	memcpy(&gc, &grid_default_cell, sizeof gc);
	colour_set_bg(&gc, colour);
	for (ptr = tim; *ptr != '\0'; ptr++) {
		if (*ptr >= '0' && *ptr <= '9')
			idx = *ptr - '0';
		else if (*ptr == ':')
			idx = 10;
		else if (*ptr == 'A')
			idx = 11;
		else if (*ptr == 'P')
			idx = 12;
		else if (*ptr == 'M')
			idx = 13;
		else {
			x += 6;
			continue;
		}

		for (j = 0; j < 5; j++) {
			for (i = 0; i < 5; i++) {
				screen_write_cursormove(&ctx, x + i, y + j);
				if (window_clock_table[idx][j][i])
					screen_write_putc(&ctx, &gc, ' ');
			}
		}
		x += 6;
	}

	screen_write_stop(&ctx);
}