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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/tmux/screen-redraw.c	Lines:	0	296	0.0 %
Date:	2017-11-07	Branches:	0	260	0.0 %


/* $OpenBSD: screen-redraw.c,v 1.46 2017/05/01 12:20:55 nicm Exp $ */

/*
 * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
 *
 * 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 <string.h>

#include "tmux.h"

static int	screen_redraw_cell_border1(struct window_pane *, u_int, u_int);
static int	screen_redraw_cell_border(struct client *, u_int, u_int);
static int	screen_redraw_check_cell(struct client *, u_int, u_int, int,
		    struct window_pane **);
static int	screen_redraw_check_is(u_int, u_int, int, int, struct window *,
		    struct window_pane *, struct window_pane *);

static int 	screen_redraw_make_pane_status(struct client *, struct window *,
		    struct window_pane *);
static void	screen_redraw_draw_pane_status(struct client *, int);

static void	screen_redraw_draw_borders(struct client *, int, int, u_int);
static void	screen_redraw_draw_panes(struct client *, u_int);
static void	screen_redraw_draw_status(struct client *, u_int);
static void	screen_redraw_draw_number(struct client *, struct window_pane *,
		    u_int);

#define CELL_INSIDE 0
#define CELL_LEFTRIGHT 1
#define CELL_TOPBOTTOM 2
#define CELL_TOPLEFT 3
#define CELL_TOPRIGHT 4
#define CELL_BOTTOMLEFT 5
#define CELL_BOTTOMRIGHT 6
#define CELL_TOPJOIN 7
#define CELL_BOTTOMJOIN 8
#define CELL_LEFTJOIN 9
#define CELL_RIGHTJOIN 10
#define CELL_JOIN 11
#define CELL_OUTSIDE 12

#define CELL_BORDERS " xqlkmjwvtun~"

#define CELL_STATUS_OFF 0
#define CELL_STATUS_TOP 1
#define CELL_STATUS_BOTTOM 2

/* Check if cell is on the border of a particular pane. */
static int
screen_redraw_cell_border1(struct window_pane *wp, u_int px, u_int py)
{
	/* Inside pane. */
	if (px >= wp->xoff && px < wp->xoff + wp->sx &&
	    py >= wp->yoff && py < wp->yoff + wp->sy)
		return (0);

	/* Left/right borders. */
	if ((wp->yoff == 0 || py >= wp->yoff - 1) && py <= wp->yoff + wp->sy) {
		if (wp->xoff != 0 && px == wp->xoff - 1)
			return (1);
		if (px == wp->xoff + wp->sx)
			return (2);
	}

	/* Top/bottom borders. */
	if ((wp->xoff == 0 || px >= wp->xoff - 1) && px <= wp->xoff + wp->sx) {
		if (wp->yoff != 0 && py == wp->yoff - 1)
			return (3);
		if (py == wp->yoff + wp->sy)
			return (4);
	}

	/* Outside pane. */
	return (-1);
}

/* Check if a cell is on the pane border. */
static int
screen_redraw_cell_border(struct client *c, u_int px, u_int py)
{
	struct window		*w = c->session->curw->window;
	struct window_pane	*wp;
	int			 retval;

	/* Check all the panes. */
	TAILQ_FOREACH(wp, &w->panes, entry) {
		if (!window_pane_visible(wp))
			continue;
		if ((retval = screen_redraw_cell_border1(wp, px, py)) != -1)
			return (!!retval);
	}

	return (0);
}

/* Check if cell inside a pane. */
static int
screen_redraw_check_cell(struct client *c, u_int px, u_int py, int pane_status,
    struct window_pane **wpp)
{
	struct window		*w = c->session->curw->window;
	struct window_pane	*wp;
	int			 borders;
	u_int			 right, line;

	*wpp = NULL;

	if (px > w->sx || py > w->sy)
		return (CELL_OUTSIDE);

	if (pane_status != CELL_STATUS_OFF) {
		TAILQ_FOREACH(wp, &w->panes, entry) {
			if (!window_pane_visible(wp))
				continue;

			if (pane_status == CELL_STATUS_TOP)
				line = wp->yoff - 1;
			else
				line = wp->yoff + wp->sy;
			right = wp->xoff + 2 + wp->status_size - 1;

			if (py == line && px >= wp->xoff + 2 && px <= right)
				return (CELL_INSIDE);
		}
	}

	TAILQ_FOREACH(wp, &w->panes, entry) {
		if (!window_pane_visible(wp))
			continue;
		*wpp = wp;

		/* If outside the pane and its border, skip it. */
		if ((wp->xoff != 0 && px < wp->xoff - 1) ||
		    px > wp->xoff + wp->sx ||
		    (wp->yoff != 0 && py < wp->yoff - 1) ||
		    py > wp->yoff + wp->sy)
			continue;

		/* If definitely inside, return so. */
		if (!screen_redraw_cell_border(c, px, py))
			return (CELL_INSIDE);

		/*
		 * Construct a bitmask of whether the cells to the left (bit
		 * 4), right, top, and bottom (bit 1) of this cell are borders.
		 */
		borders = 0;
		if (px == 0 || screen_redraw_cell_border(c, px - 1, py))
			borders |= 8;
		if (px <= w->sx && screen_redraw_cell_border(c, px + 1, py))
			borders |= 4;
		if (pane_status == CELL_STATUS_TOP) {
			if (py != 0 && screen_redraw_cell_border(c, px, py - 1))
				borders |= 2;
		} else {
			if (py == 0 || screen_redraw_cell_border(c, px, py - 1))
				borders |= 2;
		}
		if (py <= w->sy && screen_redraw_cell_border(c, px, py + 1))
			borders |= 1;

		/*
		 * Figure out what kind of border this cell is. Only one bit
		 * set doesn't make sense (can't have a border cell with no
		 * others connected).
		 */
		switch (borders) {
		case 15:	/* 1111, left right top bottom */
			return (CELL_JOIN);
		case 14:	/* 1110, left right top */
			return (CELL_BOTTOMJOIN);
		case 13:	/* 1101, left right bottom */
			return (CELL_TOPJOIN);
		case 12:	/* 1100, left right */
			return (CELL_TOPBOTTOM);
		case 11:	/* 1011, left top bottom */
			return (CELL_RIGHTJOIN);
		case 10:	/* 1010, left top */
			return (CELL_BOTTOMRIGHT);
		case 9:		/* 1001, left bottom */
			return (CELL_TOPRIGHT);
		case 7:		/* 0111, right top bottom */
			return (CELL_LEFTJOIN);
		case 6:		/* 0110, right top */
			return (CELL_BOTTOMLEFT);
		case 5:		/* 0101, right bottom */
			return (CELL_TOPLEFT);
		case 3:		/* 0011, top bottom */
			return (CELL_LEFTRIGHT);
		}
	}

	return (CELL_OUTSIDE);
}

/* Check if the border of a particular pane. */
static int
screen_redraw_check_is(u_int px, u_int py, int type, int pane_status,
    struct window *w, struct window_pane *wantwp, struct window_pane *wp)
{
	int	border;

	/* Is this off the active pane border? */
	border = screen_redraw_cell_border1(wantwp, px, py);
	if (border == 0 || border == -1)
		return (0);
	if (pane_status == CELL_STATUS_TOP && border == 4)
		return (0);
	if (pane_status == CELL_STATUS_BOTTOM && border == 3)
		return (0);

	/* If there are more than two panes, that's enough. */
	if (window_count_panes(w) != 2)
		return (1);

	/* Else if the cell is not a border cell, forget it. */
	if (wp == NULL || (type == CELL_OUTSIDE || type == CELL_INSIDE))
		return (1);

	/* With status lines mark the entire line. */
	if (pane_status != CELL_STATUS_OFF)
		return (1);

	/* Check if the pane covers the whole width. */
	if (wp->xoff == 0 && wp->sx == w->sx) {
		/* This can either be the top pane or the bottom pane. */
		if (wp->yoff == 0) { /* top pane */
			if (wp == wantwp)
				return (px <= wp->sx / 2);
			return (px > wp->sx / 2);
		}
		return (0);
	}

	/* Check if the pane covers the whole height. */
	if (wp->yoff == 0 && wp->sy == w->sy) {
		/* This can either be the left pane or the right pane. */
		if (wp->xoff == 0) { /* left pane */
			if (wp == wantwp)
				return (py <= wp->sy / 2);
			return (py > wp->sy / 2);
		}
		return (0);
	}

	return (1);
}

/* Update pane status. */
static int
screen_redraw_make_pane_status(struct client *c, struct window *w,
    struct window_pane *wp)
{
	struct grid_cell	 gc;
	const char		*fmt;
	struct format_tree	*ft;
	char			*out;
	size_t			 outlen;
	struct screen_write_ctx	 ctx;
	struct screen		 old;

	if (wp == w->active)
		style_apply(&gc, w->options, "pane-active-border-style");
	else
		style_apply(&gc, w->options, "pane-border-style");

	fmt = options_get_string(w->options, "pane-border-format");

	ft = format_create(c, NULL, FORMAT_PANE|wp->id, 0);
	format_defaults(ft, c, NULL, NULL, wp);

	memcpy(&old, &wp->status_screen, sizeof old);
	screen_init(&wp->status_screen, wp->sx, 1, 0);
	wp->status_screen.mode = 0;

	out = format_expand(ft, fmt);
	outlen = screen_write_cstrlen("%s", out);
	if (outlen > wp->sx - 4)
		outlen = wp->sx - 4;
	screen_resize(&wp->status_screen, outlen, 1, 0);

	screen_write_start(&ctx, NULL, &wp->status_screen);
	screen_write_cursormove(&ctx, 0, 0);
	screen_write_clearline(&ctx, 8);
	screen_write_cnputs(&ctx, outlen, &gc, "%s", out);
	screen_write_stop(&ctx);

	format_free(ft);

	wp->status_size = outlen;

	if (grid_compare(wp->status_screen.grid, old.grid) == 0) {
		screen_free(&old);
		return (0);
	}
	screen_free(&old);
	return (1);
}

/* Draw pane status. */
static void
screen_redraw_draw_pane_status(struct client *c, int pane_status)
{
	struct window		*w = c->session->curw->window;
	struct options		*oo = c->session->options;
	struct tty		*tty = &c->tty;
	struct window_pane	*wp;
	int			 spos;
	u_int			 yoff;

	spos = options_get_number(oo, "status-position");
	TAILQ_FOREACH(wp, &w->panes, entry) {
		if (!window_pane_visible(wp))
			continue;
		if (pane_status == CELL_STATUS_TOP)
			yoff = wp->yoff - 1;
		else
			yoff = wp->yoff + wp->sy;
		if (spos == 0)
			yoff += 1;

		tty_draw_line(tty, NULL, &wp->status_screen, 0, wp->xoff + 2,
		    yoff);
	}
	tty_cursor(tty, 0, 0);
}

/* Update status line and change flags if unchanged. */
void
screen_redraw_update(struct client *c)
{
	struct window		*w = c->session->curw->window;
	struct window_pane	*wp;
	struct options		*wo = w->options;
	int			 redraw;

	if (c->message_string != NULL)
		redraw = status_message_redraw(c);
	else if (c->prompt_string != NULL)
		redraw = status_prompt_redraw(c);
	else
		redraw = status_redraw(c);
	if (!redraw)
		c->flags &= ~CLIENT_STATUS;

	if (options_get_number(wo, "pane-border-status") != CELL_STATUS_OFF) {
		redraw = 0;
		TAILQ_FOREACH(wp, &w->panes, entry) {
			if (screen_redraw_make_pane_status(c, w, wp))
				redraw = 1;
		}
		if (redraw)
			c->flags |= CLIENT_BORDERS;
	}
}

/* Redraw entire screen. */
void
screen_redraw_screen(struct client *c, int draw_panes, int draw_status,
    int draw_borders)
{
	struct options		*oo = c->session->options;
	struct tty		*tty = &c->tty;
	struct window		*w = c->session->curw->window;
	struct options		*wo = w->options;
	u_int			 top;
	int	 		 status, pane_status, spos;

	/* Suspended clients should not be updated. */
	if (c->flags & CLIENT_SUSPENDED)
		return;

	/* Get status line, er, status. */
	spos = options_get_number(oo, "status-position");
	if (c->message_string != NULL || c->prompt_string != NULL)
		status = 1;
	else
		status = options_get_number(oo, "status");
	top = 0;
	if (status && spos == 0)
		top = 1;
	if (!status)
		draw_status = 0;

	/* Draw the elements. */
	if (draw_borders) {
		pane_status = options_get_number(wo, "pane-border-status");
		screen_redraw_draw_borders(c, status, pane_status, top);
		if (pane_status != CELL_STATUS_OFF)
			screen_redraw_draw_pane_status(c, pane_status);
	}
	if (draw_panes)
		screen_redraw_draw_panes(c, top);
	if (draw_status)
		screen_redraw_draw_status(c, top);
	tty_reset(tty);
}

/* Draw a single pane. */
void
screen_redraw_pane(struct client *c, struct window_pane *wp)
{
	u_int	i, yoff;

	if (!window_pane_visible(wp))
		return;

	yoff = wp->yoff;
	if (status_at_line(c) == 0)
		yoff++;

	log_debug("%s: redraw pane %%%u (at %u,%u)", c->name, wp->id,
	    wp->xoff, yoff);

	for (i = 0; i < wp->sy; i++)
		tty_draw_pane(&c->tty, wp, i, wp->xoff, yoff);
	tty_reset(&c->tty);
}

/* Draw the borders. */
static void
screen_redraw_draw_borders(struct client *c, int status, int pane_status,
    u_int top)
{
	struct session		*s = c->session;
	struct window		*w = s->curw->window;
	struct options		*oo = w->options;
	struct tty		*tty = &c->tty;
	struct window_pane	*wp;
	struct grid_cell	 m_active_gc, active_gc, m_other_gc, other_gc;
	struct grid_cell	 msg_gc;
	u_int		 	 i, j, type, msgx = 0, msgy = 0;
	int			 active, small, flags;
	char			 msg[256];
	const char		*tmp;
	size_t			 msglen = 0;

	small = (tty->sy - status + top > w->sy) || (tty->sx > w->sx);
	if (small) {
		flags = w->flags & (WINDOW_FORCEWIDTH|WINDOW_FORCEHEIGHT);
		if (flags == (WINDOW_FORCEWIDTH|WINDOW_FORCEHEIGHT))
			tmp = "force-width, force-height";
		else if (flags == WINDOW_FORCEWIDTH)
			tmp = "force-width";
		else if (flags == WINDOW_FORCEHEIGHT)
			tmp = "force-height";
		else
			tmp = "a smaller client";
		xsnprintf(msg, sizeof msg, "(size %ux%u from %s)",
		    w->sx, w->sy, tmp);
		msglen = strlen(msg);

		if (tty->sy - 1 - status + top > w->sy && tty->sx >= msglen) {
			msgx = tty->sx - msglen;
			msgy = tty->sy - 1 - status + top;
		} else if (tty->sx - w->sx > msglen) {
			msgx = tty->sx - msglen;
			msgy = tty->sy - 1 - status + top;
		} else
			small = 0;
	}

	style_apply(&other_gc, oo, "pane-border-style");
	style_apply(&active_gc, oo, "pane-active-border-style");
	active_gc.attr = other_gc.attr = GRID_ATTR_CHARSET;

	memcpy(&m_other_gc, &other_gc, sizeof m_other_gc);
	m_other_gc.attr ^= GRID_ATTR_REVERSE;
	memcpy(&m_active_gc, &active_gc, sizeof m_active_gc);
	m_active_gc.attr ^= GRID_ATTR_REVERSE;

	for (j = 0; j < tty->sy - status; j++) {
		for (i = 0; i < tty->sx; i++) {
			type = screen_redraw_check_cell(c, i, j, pane_status,
			    &wp);
			if (type == CELL_INSIDE)
				continue;
			if (type == CELL_OUTSIDE && small &&
			    i > msgx && j == msgy)
				continue;
			active = screen_redraw_check_is(i, j, type, pane_status,
			    w, w->active, wp);
			if (server_is_marked(s, s->curw, marked_pane.wp) &&
			    screen_redraw_check_is(i, j, type, pane_status, w,
			    marked_pane.wp, wp)) {
				if (active)
					tty_attributes(tty, &m_active_gc, NULL);
				else
					tty_attributes(tty, &m_other_gc, NULL);
			} else if (active)
				tty_attributes(tty, &active_gc, NULL);
			else
				tty_attributes(tty, &other_gc, NULL);
			tty_cursor(tty, i, top + j);
			tty_putc(tty, CELL_BORDERS[type]);
		}
	}

	if (small) {
		memcpy(&msg_gc, &grid_default_cell, sizeof msg_gc);
		tty_attributes(tty, &msg_gc, NULL);
		tty_cursor(tty, msgx, msgy);
		tty_puts(tty, msg);
	}
}

/* Draw the panes. */
static void
screen_redraw_draw_panes(struct client *c, u_int top)
{
	struct window		*w = c->session->curw->window;
	struct tty		*tty = &c->tty;
	struct window_pane	*wp;
	u_int		 	 i;

	TAILQ_FOREACH(wp, &w->panes, entry) {
		if (!window_pane_visible(wp))
			continue;
		for (i = 0; i < wp->sy; i++)
			tty_draw_pane(tty, wp, i, wp->xoff, top + wp->yoff);
		if (c->flags & CLIENT_IDENTIFY)
			screen_redraw_draw_number(c, wp, top);
	}
}

/* Draw the status line. */
static void
screen_redraw_draw_status(struct client *c, u_int top)
{
	struct tty	*tty = &c->tty;

	if (top)
		tty_draw_line(tty, NULL, &c->status, 0, 0, 0);
	else
		tty_draw_line(tty, NULL, &c->status, 0, 0, tty->sy - 1);
}

/* Draw number on a pane. */
static void
screen_redraw_draw_number(struct client *c, struct window_pane *wp, u_int top)
{
	struct tty		*tty = &c->tty;
	struct session		*s = c->session;
	struct options		*oo = s->options;
	struct window		*w = wp->window;
	struct grid_cell	 gc;
	u_int			 idx, px, py, i, j, xoff, yoff;
	int			 colour, active_colour;
	char			 buf[16], *ptr;
	size_t			 len;

	if (window_pane_index(wp, &idx) != 0)
		fatalx("index not found");
	len = xsnprintf(buf, sizeof buf, "%u", idx);

	if (wp->sx < len)
		return;
	colour = options_get_number(oo, "display-panes-colour");
	active_colour = options_get_number(oo, "display-panes-active-colour");

	px = wp->sx / 2; py = wp->sy / 2;
	xoff = wp->xoff; yoff = wp->yoff;

	if (top)
		yoff++;

	if (wp->sx < len * 6 || wp->sy < 5) {
		tty_cursor(tty, xoff + px - len / 2, yoff + py);
		goto draw_text;
	}

	px -= len * 3;
	py -= 2;

	memcpy(&gc, &grid_default_cell, sizeof gc);
	if (w->active == wp)
		gc.bg = active_colour;
	else
		gc.bg = colour;
	gc.flags |= GRID_FLAG_NOPALETTE;

	tty_attributes(tty, &gc, wp);
	for (ptr = buf; *ptr != '\0'; ptr++) {
		if (*ptr < '0' || *ptr > '9')
			continue;
		idx = *ptr - '0';

		for (j = 0; j < 5; j++) {
			for (i = px; i < px + 5; i++) {
				tty_cursor(tty, xoff + i, yoff + py + j);
				if (window_clock_table[idx][j][i - px])
					tty_putc(tty, ' ');
			}
		}
		px += 6;
	}

	len = xsnprintf(buf, sizeof buf, "%ux%u", wp->sx, wp->sy);
	if (wp->sx < len || wp->sy < 6)
		return;
	tty_cursor(tty, xoff + wp->sx - len, yoff);

draw_text:
	memcpy(&gc, &grid_default_cell, sizeof gc);
	if (w->active == wp)
		gc.fg = active_colour;
	else
		gc.fg = colour;
	gc.flags |= GRID_FLAG_NOPALETTE;

	tty_attributes(tty, &gc, wp);
	tty_puts(tty, buf);

	tty_cursor(tty, 0, 0);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: screen-redraw.c,v 1.46 2017/05/01 12:20:55 nicm Exp $ */
2
3			/*
4			* Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
5			*
6			* Permission to use, copy, modify, and distribute this software for any
7			* purpose with or without fee is hereby granted, provided that the above
8			* copyright notice and this permission notice appear in all copies.
9			*
10			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14			* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15			* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16			* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17			*/
18
19			#include <sys/types.h>
20
21			#include <string.h>
22
23			#include "tmux.h"
24
25			static int screen_redraw_cell_border1(struct window_pane *, u_int, u_int);
26			static int screen_redraw_cell_border(struct client *, u_int, u_int);
27			static int screen_redraw_check_cell(struct client *, u_int, u_int, int,
28			struct window_pane **);
29			static int screen_redraw_check_is(u_int, u_int, int, int, struct window *,
30			struct window_pane , struct window_pane );
31
32			static int screen_redraw_make_pane_status(struct client , struct window ,
33			struct window_pane *);
34			static void screen_redraw_draw_pane_status(struct client *, int);
35
36			static void screen_redraw_draw_borders(struct client *, int, int, u_int);
37			static void screen_redraw_draw_panes(struct client *, u_int);
38			static void screen_redraw_draw_status(struct client *, u_int);
39			static void screen_redraw_draw_number(struct client , struct window_pane ,
40			u_int);
41
42			#define CELL_INSIDE 0
43			#define CELL_LEFTRIGHT 1
44			#define CELL_TOPBOTTOM 2
45			#define CELL_TOPLEFT 3
46			#define CELL_TOPRIGHT 4
47			#define CELL_BOTTOMLEFT 5
48			#define CELL_BOTTOMRIGHT 6
49			#define CELL_TOPJOIN 7
50			#define CELL_BOTTOMJOIN 8
51			#define CELL_LEFTJOIN 9
52			#define CELL_RIGHTJOIN 10
53			#define CELL_JOIN 11
54			#define CELL_OUTSIDE 12
55
56			#define CELL_BORDERS " xqlkmjwvtun~"
57
58			#define CELL_STATUS_OFF 0
59			#define CELL_STATUS_TOP 1
60			#define CELL_STATUS_BOTTOM 2
61
62			/* Check if cell is on the border of a particular pane. */
63			static int
64			screen_redraw_cell_border1(struct window_pane *wp, u_int px, u_int py)
65			{
66			/* Inside pane. */
67			if (px >= wp->xoff && px < wp->xoff + wp->sx &&
68			py >= wp->yoff && py < wp->yoff + wp->sy)
69			return (0);
70
71			/* Left/right borders. */
72			if ((wp->yoff == 0 \|\| py >= wp->yoff - 1) && py <= wp->yoff + wp->sy) {
73			if (wp->xoff != 0 && px == wp->xoff - 1)
74			return (1);
75			if (px == wp->xoff + wp->sx)
76			return (2);
77			}
78
79			/* Top/bottom borders. */
80			if ((wp->xoff == 0 \|\| px >= wp->xoff - 1) && px <= wp->xoff + wp->sx) {
81			if (wp->yoff != 0 && py == wp->yoff - 1)
82			return (3);
83			if (py == wp->yoff + wp->sy)
84			return (4);
85			}
86
87			/* Outside pane. */
88			return (-1);
89			}
90
91			/* Check if a cell is on the pane border. */
92			static int
93			screen_redraw_cell_border(struct client *c, u_int px, u_int py)
94			{
95			struct window *w = c->session->curw->window;
96			struct window_pane *wp;
97			int retval;
98
99			/* Check all the panes. */
100			TAILQ_FOREACH(wp, &w->panes, entry) {
101			if (!window_pane_visible(wp))
102			continue;
103			if ((retval = screen_redraw_cell_border1(wp, px, py)) != -1)
104			return (!!retval);
105			}
106
107			return (0);
108			}
109
110			/* Check if cell inside a pane. */
111			static int
112			screen_redraw_check_cell(struct client *c, u_int px, u_int py, int pane_status,
113			struct window_pane **wpp)
114			{
115			struct window *w = c->session->curw->window;
116			struct window_pane *wp;
117			int borders;
118			u_int right, line;
119
120			*wpp = NULL;
121
122			if (px > w->sx \|\| py > w->sy)
123			return (CELL_OUTSIDE);
124
125			if (pane_status != CELL_STATUS_OFF) {
126			TAILQ_FOREACH(wp, &w->panes, entry) {
127			if (!window_pane_visible(wp))
128			continue;
129
130			if (pane_status == CELL_STATUS_TOP)
131			line = wp->yoff - 1;
132			else
133			line = wp->yoff + wp->sy;
134			right = wp->xoff + 2 + wp->status_size - 1;
135
136			if (py == line && px >= wp->xoff + 2 && px <= right)
137			return (CELL_INSIDE);
138			}
139			}
140
141			TAILQ_FOREACH(wp, &w->panes, entry) {
142			if (!window_pane_visible(wp))
143			continue;
144			*wpp = wp;
145
146			/* If outside the pane and its border, skip it. */
147			if ((wp->xoff != 0 && px < wp->xoff - 1) \|\|
148			px > wp->xoff + wp->sx \|\|
149			(wp->yoff != 0 && py < wp->yoff - 1) \|\|
150			py > wp->yoff + wp->sy)
151			continue;
152
153			/* If definitely inside, return so. */
154			if (!screen_redraw_cell_border(c, px, py))
155			return (CELL_INSIDE);
156
157			/*
158			* Construct a bitmask of whether the cells to the left (bit
159			* 4), right, top, and bottom (bit 1) of this cell are borders.
160			*/
161			borders = 0;
162			if (px == 0 \|\| screen_redraw_cell_border(c, px - 1, py))
163			borders \|= 8;
164			if (px <= w->sx && screen_redraw_cell_border(c, px + 1, py))
165			borders \|= 4;
166			if (pane_status == CELL_STATUS_TOP) {
167			if (py != 0 && screen_redraw_cell_border(c, px, py - 1))
168			borders \|= 2;
169			} else {
170			if (py == 0 \|\| screen_redraw_cell_border(c, px, py - 1))
171			borders \|= 2;
172			}
173			if (py <= w->sy && screen_redraw_cell_border(c, px, py + 1))
174			borders \|= 1;
175
176			/*
177			* Figure out what kind of border this cell is. Only one bit
178			* set doesn't make sense (can't have a border cell with no
179			* others connected).
180			*/
181			switch (borders) {
182			case 15: /* 1111, left right top bottom */
183			return (CELL_JOIN);
184			case 14: /* 1110, left right top */
185			return (CELL_BOTTOMJOIN);
186			case 13: /* 1101, left right bottom */
187			return (CELL_TOPJOIN);
188			case 12: /* 1100, left right */
189			return (CELL_TOPBOTTOM);
190			case 11: /* 1011, left top bottom */
191			return (CELL_RIGHTJOIN);
192			case 10: /* 1010, left top */
193			return (CELL_BOTTOMRIGHT);
194			case 9: /* 1001, left bottom */
195			return (CELL_TOPRIGHT);
196			case 7: /* 0111, right top bottom */
197			return (CELL_LEFTJOIN);
198			case 6: /* 0110, right top */
199			return (CELL_BOTTOMLEFT);
200			case 5: /* 0101, right bottom */
201			return (CELL_TOPLEFT);
202			case 3: /* 0011, top bottom */
203			return (CELL_LEFTRIGHT);
204			}
205			}
206
207			return (CELL_OUTSIDE);
208			}
209
210			/* Check if the border of a particular pane. */
211			static int
212			screen_redraw_check_is(u_int px, u_int py, int type, int pane_status,
213			struct window w, struct window_pane wantwp, struct window_pane *wp)
214			{
215			int border;
216
217			/* Is this off the active pane border? */
218			border = screen_redraw_cell_border1(wantwp, px, py);
219			if (border == 0 \|\| border == -1)
220			return (0);
221			if (pane_status == CELL_STATUS_TOP && border == 4)
222			return (0);
223			if (pane_status == CELL_STATUS_BOTTOM && border == 3)
224			return (0);
225
226			/* If there are more than two panes, that's enough. */
227			if (window_count_panes(w) != 2)
228			return (1);
229
230			/* Else if the cell is not a border cell, forget it. */
231			if (wp == NULL \|\| (type == CELL_OUTSIDE \|\| type == CELL_INSIDE))
232			return (1);
233
234			/* With status lines mark the entire line. */
235			if (pane_status != CELL_STATUS_OFF)
236			return (1);
237
238			/* Check if the pane covers the whole width. */
239			if (wp->xoff == 0 && wp->sx == w->sx) {
240			/* This can either be the top pane or the bottom pane. */
241			if (wp->yoff == 0) { /* top pane */
242			if (wp == wantwp)
243			return (px <= wp->sx / 2);
244			return (px > wp->sx / 2);
245			}
246			return (0);
247			}
248
249			/* Check if the pane covers the whole height. */
250			if (wp->yoff == 0 && wp->sy == w->sy) {
251			/* This can either be the left pane or the right pane. */
252			if (wp->xoff == 0) { /* left pane */
253			if (wp == wantwp)
254			return (py <= wp->sy / 2);
255			return (py > wp->sy / 2);
256			}
257			return (0);
258			}
259
260			return (1);
261			}
262
263			/* Update pane status. */
264			static int
265			screen_redraw_make_pane_status(struct client c, struct window w,
266			struct window_pane *wp)
267			{
268			struct grid_cell gc;
269			const char *fmt;
270			struct format_tree *ft;
271			char *out;
272			size_t outlen;
273			struct screen_write_ctx ctx;
274			struct screen old;
275
276			if (wp == w->active)
277			style_apply(&gc, w->options, "pane-active-border-style");
278			else
279			style_apply(&gc, w->options, "pane-border-style");
280
281			fmt = options_get_string(w->options, "pane-border-format");
282
283			ft = format_create(c, NULL, FORMAT_PANE\|wp->id, 0);
284			format_defaults(ft, c, NULL, NULL, wp);
285
286			memcpy(&old, &wp->status_screen, sizeof old);
287			screen_init(&wp->status_screen, wp->sx, 1, 0);
288			wp->status_screen.mode = 0;
289
290			out = format_expand(ft, fmt);
291			outlen = screen_write_cstrlen("%s", out);
292			if (outlen > wp->sx - 4)
293			outlen = wp->sx - 4;
294			screen_resize(&wp->status_screen, outlen, 1, 0);
295
296			screen_write_start(&ctx, NULL, &wp->status_screen);
297			screen_write_cursormove(&ctx, 0, 0);
298			screen_write_clearline(&ctx, 8);
299			screen_write_cnputs(&ctx, outlen, &gc, "%s", out);
300			screen_write_stop(&ctx);
301
302			format_free(ft);
303
304			wp->status_size = outlen;
305
306			if (grid_compare(wp->status_screen.grid, old.grid) == 0) {
307			screen_free(&old);
308			return (0);
309			}
310			screen_free(&old);
311			return (1);
312			}
313
314			/* Draw pane status. */
315			static void
316			screen_redraw_draw_pane_status(struct client *c, int pane_status)
317			{
318			struct window *w = c->session->curw->window;
319			struct options *oo = c->session->options;
320			struct tty *tty = &c->tty;
321			struct window_pane *wp;
322			int spos;
323			u_int yoff;
324
325			spos = options_get_number(oo, "status-position");
326			TAILQ_FOREACH(wp, &w->panes, entry) {
327			if (!window_pane_visible(wp))
328			continue;
329			if (pane_status == CELL_STATUS_TOP)
330			yoff = wp->yoff - 1;
331			else
332			yoff = wp->yoff + wp->sy;
333			if (spos == 0)
334			yoff += 1;
335
336			tty_draw_line(tty, NULL, &wp->status_screen, 0, wp->xoff + 2,
337			yoff);
338			}
339			tty_cursor(tty, 0, 0);
340			}
341
342			/* Update status line and change flags if unchanged. */
343			void
344			screen_redraw_update(struct client *c)
345			{
346			struct window *w = c->session->curw->window;
347			struct window_pane *wp;
348			struct options *wo = w->options;
349			int redraw;
350
351			if (c->message_string != NULL)
352			redraw = status_message_redraw(c);
353			else if (c->prompt_string != NULL)
354			redraw = status_prompt_redraw(c);
355			else
356			redraw = status_redraw(c);
357			if (!redraw)
358			c->flags &= ~CLIENT_STATUS;
359
360			if (options_get_number(wo, "pane-border-status") != CELL_STATUS_OFF) {
361			redraw = 0;
362			TAILQ_FOREACH(wp, &w->panes, entry) {
363			if (screen_redraw_make_pane_status(c, w, wp))
364			redraw = 1;
365			}
366			if (redraw)
367			c->flags \|= CLIENT_BORDERS;
368			}
369			}
370
371			/* Redraw entire screen. */
372			void
373			screen_redraw_screen(struct client *c, int draw_panes, int draw_status,
374			int draw_borders)
375			{
376			struct options *oo = c->session->options;
377			struct tty *tty = &c->tty;
378			struct window *w = c->session->curw->window;
379			struct options *wo = w->options;
380			u_int top;
381			int status, pane_status, spos;
382
383			/* Suspended clients should not be updated. */
384			if (c->flags & CLIENT_SUSPENDED)
385			return;
386
387			/* Get status line, er, status. */
388			spos = options_get_number(oo, "status-position");
389			if (c->message_string != NULL \|\| c->prompt_string != NULL)
390			status = 1;
391			else
392			status = options_get_number(oo, "status");
393			top = 0;
394			if (status && spos == 0)
395			top = 1;
396			if (!status)
397			draw_status = 0;
398
399			/* Draw the elements. */
400			if (draw_borders) {
401			pane_status = options_get_number(wo, "pane-border-status");
402			screen_redraw_draw_borders(c, status, pane_status, top);
403			if (pane_status != CELL_STATUS_OFF)
404			screen_redraw_draw_pane_status(c, pane_status);
405			}
406			if (draw_panes)
407			screen_redraw_draw_panes(c, top);
408			if (draw_status)
409			screen_redraw_draw_status(c, top);
410			tty_reset(tty);
411			}
412
413			/* Draw a single pane. */
414			void
415			screen_redraw_pane(struct client c, struct window_pane wp)
416			{
417			u_int i, yoff;
418
419			if (!window_pane_visible(wp))
420			return;
421
422			yoff = wp->yoff;
423			if (status_at_line(c) == 0)
424			yoff++;
425
426			log_debug("%s: redraw pane %%%u (at %u,%u)", c->name, wp->id,
427			wp->xoff, yoff);
428
429			for (i = 0; i < wp->sy; i++)
430			tty_draw_pane(&c->tty, wp, i, wp->xoff, yoff);
431			tty_reset(&c->tty);
432			}
433
434			/* Draw the borders. */
435			static void
436			screen_redraw_draw_borders(struct client *c, int status, int pane_status,
437			u_int top)
438			{
439			struct session *s = c->session;
440			struct window *w = s->curw->window;
441			struct options *oo = w->options;
442			struct tty *tty = &c->tty;
443			struct window_pane *wp;
444			struct grid_cell m_active_gc, active_gc, m_other_gc, other_gc;
445			struct grid_cell msg_gc;
446			u_int i, j, type, msgx = 0, msgy = 0;
447			int active, small, flags;
448			char msg[256];
449			const char *tmp;
450			size_t msglen = 0;
451
452			small = (tty->sy - status + top > w->sy) \|\| (tty->sx > w->sx);
453			if (small) {
454			flags = w->flags & (WINDOW_FORCEWIDTH\|WINDOW_FORCEHEIGHT);
455			if (flags == (WINDOW_FORCEWIDTH\|WINDOW_FORCEHEIGHT))
456			tmp = "force-width, force-height";
457			else if (flags == WINDOW_FORCEWIDTH)
458			tmp = "force-width";
459			else if (flags == WINDOW_FORCEHEIGHT)
460			tmp = "force-height";
461			else
462			tmp = "a smaller client";
463			xsnprintf(msg, sizeof msg, "(size %ux%u from %s)",
464			w->sx, w->sy, tmp);
465			msglen = strlen(msg);
466
467			if (tty->sy - 1 - status + top > w->sy && tty->sx >= msglen) {
468			msgx = tty->sx - msglen;
469			msgy = tty->sy - 1 - status + top;
470			} else if (tty->sx - w->sx > msglen) {
471			msgx = tty->sx - msglen;
472			msgy = tty->sy - 1 - status + top;
473			} else
474			small = 0;
475			}
476
477			style_apply(&other_gc, oo, "pane-border-style");
478			style_apply(&active_gc, oo, "pane-active-border-style");
479			active_gc.attr = other_gc.attr = GRID_ATTR_CHARSET;
480
481			memcpy(&m_other_gc, &other_gc, sizeof m_other_gc);
482			m_other_gc.attr ^= GRID_ATTR_REVERSE;
483			memcpy(&m_active_gc, &active_gc, sizeof m_active_gc);
484			m_active_gc.attr ^= GRID_ATTR_REVERSE;
485
486			for (j = 0; j < tty->sy - status; j++) {
487			for (i = 0; i < tty->sx; i++) {
488			type = screen_redraw_check_cell(c, i, j, pane_status,
489			&wp);
490			if (type == CELL_INSIDE)
491			continue;
492			if (type == CELL_OUTSIDE && small &&
493			i > msgx && j == msgy)
494			continue;
495			active = screen_redraw_check_is(i, j, type, pane_status,
496			w, w->active, wp);
497			if (server_is_marked(s, s->curw, marked_pane.wp) &&
498			screen_redraw_check_is(i, j, type, pane_status, w,
499			marked_pane.wp, wp)) {
500			if (active)
501			tty_attributes(tty, &m_active_gc, NULL);
502			else
503			tty_attributes(tty, &m_other_gc, NULL);
504			} else if (active)
505			tty_attributes(tty, &active_gc, NULL);
506			else
507			tty_attributes(tty, &other_gc, NULL);
508			tty_cursor(tty, i, top + j);
509			tty_putc(tty, CELL_BORDERS[type]);
510			}
511			}
512
513			if (small) {
514			memcpy(&msg_gc, &grid_default_cell, sizeof msg_gc);
515			tty_attributes(tty, &msg_gc, NULL);
516			tty_cursor(tty, msgx, msgy);
517			tty_puts(tty, msg);
518			}
519			}
520
521			/* Draw the panes. */
522			static void
523			screen_redraw_draw_panes(struct client *c, u_int top)
524			{
525			struct window *w = c->session->curw->window;
526			struct tty *tty = &c->tty;
527			struct window_pane *wp;
528			u_int i;
529
530			TAILQ_FOREACH(wp, &w->panes, entry) {
531			if (!window_pane_visible(wp))
532			continue;
533			for (i = 0; i < wp->sy; i++)
534			tty_draw_pane(tty, wp, i, wp->xoff, top + wp->yoff);
535			if (c->flags & CLIENT_IDENTIFY)
536			screen_redraw_draw_number(c, wp, top);
537			}
538			}
539
540			/* Draw the status line. */
541			static void
542			screen_redraw_draw_status(struct client *c, u_int top)
543			{
544			struct tty *tty = &c->tty;
545
546			if (top)
547			tty_draw_line(tty, NULL, &c->status, 0, 0, 0);
548			else
549			tty_draw_line(tty, NULL, &c->status, 0, 0, tty->sy - 1);
550			}
551
552			/* Draw number on a pane. */
553			static void
554			screen_redraw_draw_number(struct client c, struct window_pane wp, u_int top)
555			{
556			struct tty *tty = &c->tty;
557			struct session *s = c->session;
558			struct options *oo = s->options;
559			struct window *w = wp->window;
560			struct grid_cell gc;
561			u_int idx, px, py, i, j, xoff, yoff;
562			int colour, active_colour;
563			char buf[16], *ptr;
564			size_t len;
565
566			if (window_pane_index(wp, &idx) != 0)
567			fatalx("index not found");
568			len = xsnprintf(buf, sizeof buf, "%u", idx);
569
570			if (wp->sx < len)
571			return;
572			colour = options_get_number(oo, "display-panes-colour");
573			active_colour = options_get_number(oo, "display-panes-active-colour");
574
575			px = wp->sx / 2; py = wp->sy / 2;
576			xoff = wp->xoff; yoff = wp->yoff;
577
578			if (top)
579			yoff++;
580
581			if (wp->sx < len * 6 \|\| wp->sy < 5) {
582			tty_cursor(tty, xoff + px - len / 2, yoff + py);
583			goto draw_text;
584			}
585
586			px -= len * 3;
587			py -= 2;
588
589			memcpy(&gc, &grid_default_cell, sizeof gc);
590			if (w->active == wp)
591			gc.bg = active_colour;
592			else
593			gc.bg = colour;
594			gc.flags \|= GRID_FLAG_NOPALETTE;
595
596			tty_attributes(tty, &gc, wp);
597			for (ptr = buf; *ptr != '\0'; ptr++) {
598			if (ptr < '0' \|\| ptr > '9')
599			continue;
600			idx = *ptr - '0';
601
602			for (j = 0; j < 5; j++) {
603			for (i = px; i < px + 5; i++) {
604			tty_cursor(tty, xoff + i, yoff + py + j);
605			if (window_clock_table[idx][j][i - px])
606			tty_putc(tty, ' ');
607			}
608			}
609			px += 6;
610			}
611
612			len = xsnprintf(buf, sizeof buf, "%ux%u", wp->sx, wp->sy);
613			if (wp->sx < len \|\| wp->sy < 6)
614			return;
615			tty_cursor(tty, xoff + wp->sx - len, yoff);
616
617			draw_text:
618			memcpy(&gc, &grid_default_cell, sizeof gc);
619			if (w->active == wp)
620			gc.fg = active_colour;
621			else
622			gc.fg = colour;
623			gc.flags \|= GRID_FLAG_NOPALETTE;
624
625			tty_attributes(tty, &gc, wp);
626			tty_puts(tty, buf);
627
628			tty_cursor(tty, 0, 0);
629			}