tmux/screen-redraw.c
Nicholas Marriott 181e1bcffd Reset the attributes after drawing all or part of the screen, and reset the
region before poll(2). This reduces (but does not eliminate) the chance of the
attributes not being normal if tmux is disconnected without warning (ssh ~.,
reboot from inside, etc).
2009-08-10 19:42:03 +00:00

231 lines
6.1 KiB
C

/* $OpenBSD$ */
/*
* 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 <string.h>
#include "tmux.h"
int screen_redraw_cell_border(struct client *, u_int, u_int);
int screen_redraw_check_cell(struct client *, u_int, 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
/* 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;
/* Check all the panes. */
TAILQ_FOREACH(wp, &w->panes, entry) {
if (!window_pane_visible(wp))
continue;
/* 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 (1);
}
/* 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 (1);
if (py == wp->yoff + wp->sy)
return (1);
}
}
return (0);
}
/* Check if cell inside a pane. */
int
screen_redraw_check_cell(struct client *c, u_int px, u_int py)
{
struct window *w = c->session->curw->window;
struct window_pane *wp;
int borders;
if (px > w->sx || py > w->sy)
return (CELL_OUTSIDE);
TAILQ_FOREACH(wp, &w->panes, entry) {
if (!window_pane_visible(wp))
continue;
/* 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 (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);
}
/* Redraw entire screen. */
void
screen_redraw_screen(struct client *c, int status_only)
{
struct window *w = c->session->curw->window;
struct tty *tty = &c->tty;
struct window_pane *wp;
u_int i, j, type;
int status;
const u_char *base, *ptr;
u_char ch, border[20];
/* Get status line, er, status. */
if (c->message_string != NULL || c->prompt_string != NULL)
status = 1;
else
status = options_get_number(&c->session->options, "status");
/* If only drawing status and it is present, don't need the rest. */
if (status_only && status) {
tty_draw_line(tty, &c->status, 0, 0, tty->sy - 1);
tty_reset(tty);
return;
}
/* Draw background and borders. */
tty_reset(tty);
strlcpy(border, " |-....--||+.", sizeof border);
if (tty_term_has(tty->term, TTYC_ACSC)) {
base = " xqlkmjwvtun~";
for (ptr = base; *ptr != '\0'; ptr++) {
if ((ch = tty_get_acs(tty, *ptr)) != '\0')
border[ptr - base] = ch;
}
tty_putcode(tty, TTYC_SMACS);
}
for (j = 0; j < tty->sy - status; j++) {
if (status_only && j != tty->sy - 1)
continue;
for (i = 0; i < tty->sx; i++) {
type = screen_redraw_check_cell(c, i, j);
if (type != CELL_INSIDE) {
tty_cursor(tty, i, j, 0, 0);
tty_putc(tty, border[type]);
}
}
}
tty_putcode(tty, TTYC_RMACS);
/* Draw the panes. */
TAILQ_FOREACH(wp, &w->panes, entry) {
if (!window_pane_visible(wp))
continue;
for (i = 0; i < wp->sy; i++) {
if (status_only && wp->yoff + i != tty->sy - 1)
continue;
tty_draw_line(tty, wp->screen, i, wp->xoff, wp->yoff);
}
}
/* Draw the status line. */
if (status)
tty_draw_line(tty, &c->status, 0, 0, tty->sy - 1);
tty_reset(tty);
}
/* Draw a single pane. */
void
screen_redraw_pane(struct client *c, struct window_pane *wp)
{
u_int i;
for (i = 0; i < wp->sy; i++)
tty_draw_line(&c->tty, wp->screen, i, wp->xoff, wp->yoff);
tty_reset(&c->tty);
}