/* $OpenBSD$ */
/*
* 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(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);
}
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