Return to screen-redraw.c CVS log

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Instead of representing colours in several different forms with various
cell flags, convert to use an int with flags marking 256 or RGB colours
in the top byte (except in cells, which we don't want to make any
bigger). From Brad Town.

/* $OpenBSD: screen-redraw.c,v 1.37 2016/07/15 00:42:56 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"

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

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

void	screen_redraw_draw_borders(struct client *, int, int, u_int);
void	screen_redraw_draw_panes(struct client *, u_int);
void	screen_redraw_draw_status(struct client *, u_int);
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. */
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. */
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. */
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;

	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);
		}
	}

	*wpp = NULL;
	return (CELL_OUTSIDE);
}

/* Check if the border of a particular pane. */
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. */
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, old_size = wp->status_size;
	struct screen_write_ctx	 ctx;

	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(NULL, 0);
	format_defaults(ft, c, NULL, NULL, wp);

	screen_free(&wp->status_screen);
	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);
	screen_write_cnputs(&ctx, outlen, &gc, "%s", out);
	screen_write_stop(&ctx);

	format_free(ft);

	wp->status_size = outlen;
	return (wp->status_size != old_size);
}

/* Draw pane status. */
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 (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);
}

/* 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 window_pane	*wp;
	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;

	/* Update pane status lines. */
	pane_status = options_get_number(w->options, "pane-border-status");
	if (pane_status != CELL_STATUS_OFF && (draw_borders || draw_status)) {
		TAILQ_FOREACH(wp, &w->panes, entry) {
			if (screen_redraw_make_pane_status(c, w, wp))
				draw_borders = draw_status = 1;
		}
	}

	/* Draw the elements. */
	if (draw_borders)
		screen_redraw_draw_borders(c, status, pane_status, top);
	if (draw_panes)
		screen_redraw_draw_panes(c, top);
	if (draw_status)
		screen_redraw_draw_status(c, top);
	if (pane_status != CELL_STATUS_OFF && (draw_borders || draw_status))
		screen_redraw_draw_pane_status(c, pane_status);
	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++;

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

/* Draw the borders. */
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. */
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. */
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. */
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;
	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;
	tty_attributes(tty, &gc, wp);
	tty_puts(tty, buf);

	tty_cursor(tty, 0, 0);
}