tmux/screen-redraw.c
2020-04-29 08:24:09 +01:00

699 lines
17 KiB
C

/* $OpenBSD$ */
/*
* 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 <stdlib.h>
#include <string.h>
#include "tmux.h"
static void screen_redraw_draw_borders(struct screen_redraw_ctx *);
static void screen_redraw_draw_panes(struct screen_redraw_ctx *);
static void screen_redraw_draw_status(struct screen_redraw_ctx *);
static void screen_redraw_draw_pane(struct screen_redraw_ctx *,
struct window_pane *);
#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~"
/* Return if window has only two panes. */
static int
screen_redraw_two_panes(struct window *w)
{
struct window_pane *wp;
wp = TAILQ_NEXT(TAILQ_FIRST(&w->panes), entry);
if (wp == NULL)
return (0); /* one pane */
if (TAILQ_NEXT(wp, entry) != NULL)
return (0); /* more than two panes */
return (1);
}
/* 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,
int pane_status)
{
u_int ex = wp->xoff + wp->sx, ey = wp->yoff + wp->sy;
/* Inside pane. */
if (px >= wp->xoff && px < ex && py >= wp->yoff && py < ey)
return (0);
/* Left/right borders. */
if (pane_status == PANE_STATUS_OFF) {
if (screen_redraw_two_panes(wp->window)) {
if (wp->xoff == 0 && px == wp->sx && py <= wp->sy / 2)
return (2);
if (wp->xoff != 0 &&
px == wp->xoff - 1 &&
py > wp->sy / 2)
return (1);
} else {
if ((wp->yoff == 0 || py >= wp->yoff - 1) && py <= ey) {
if (wp->xoff != 0 && px == wp->xoff - 1)
return (1);
if (px == ex)
return (2);
}
}
} else {
if ((wp->yoff == 0 || py >= wp->yoff - 1) && py <= ey) {
if (wp->xoff != 0 && px == wp->xoff - 1)
return (1);
if (px == ex)
return (2);
}
}
/* Top/bottom borders. */
if (pane_status == PANE_STATUS_OFF) {
if (screen_redraw_two_panes(wp->window)) {
if (wp->yoff == 0 && py == wp->sy && px <= wp->sx / 2)
return (4);
if (wp->yoff != 0 &&
py == wp->yoff - 1 &&
px > wp->sx / 2)
return (3);
} else {
if ((wp->xoff == 0 || px >= wp->xoff - 1) && px <= ex) {
if (wp->yoff != 0 && py == wp->yoff - 1)
return (3);
if (py == ey)
return (4);
}
}
} else if (pane_status == PANE_STATUS_TOP) {
if ((wp->xoff == 0 || px >= wp->xoff - 1) && px <= ex) {
if (wp->yoff != 0 && py == wp->yoff - 1)
return (3);
}
} else {
if ((wp->xoff == 0 || px >= wp->xoff - 1) && px <= ex) {
if (py == ey)
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, int pane_status)
{
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;
retval = screen_redraw_cell_border1(wp, px, py, pane_status);
if (retval != -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, border;
u_int right, line;
*wpp = NULL;
if (px > w->sx || py > w->sy)
return (CELL_OUTSIDE);
if (pane_status != PANE_STATUS_OFF) {
wp = w->active;
do {
if (!window_pane_visible(wp))
goto next1;
if (pane_status == PANE_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);
next1:
wp = TAILQ_NEXT(wp, entry);
if (wp == NULL)
wp = TAILQ_FIRST(&w->panes);
} while (wp != w->active);
}
wp = w->active;
do {
if (!window_pane_visible(wp))
goto next2;
*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)
goto next2;
/* If definitely inside, return. If not on border, skip. */
border = screen_redraw_cell_border1(wp, px, py, pane_status);
if (border == 0)
return (CELL_INSIDE);
if (border == -1)
goto next2;
/*
* 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, pane_status))
borders |= 8;
if (px <= w->sx &&
screen_redraw_cell_border(c, px + 1, py, pane_status))
borders |= 4;
if (pane_status == PANE_STATUS_TOP &&
py != 0 &&
screen_redraw_cell_border(c, px, py - 1, pane_status))
borders |= 2;
else if (pane_status != PANE_STATUS_TOP &&
(py == 0 ||
screen_redraw_cell_border(c, px, py - 1, pane_status)))
borders |= 2;
if (py <= w->sy &&
screen_redraw_cell_border(c, px, py + 1, pane_status))
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);
}
next2:
wp = TAILQ_NEXT(wp, entry);
if (wp == NULL)
wp = TAILQ_FIRST(&w->panes);
} while (wp != w->active);
return (CELL_OUTSIDE);
}
/* Check if the border of a particular pane. */
static int
screen_redraw_check_is(u_int px, u_int py, int pane_status,
struct window_pane *wp)
{
int border;
border = screen_redraw_cell_border1(wp, px, py, pane_status);
if (border == 0 || border == -1)
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 *expanded;
u_int width, i;
struct screen_write_ctx ctx;
struct screen old;
ft = format_create(c, NULL, FORMAT_PANE|wp->id, FORMAT_STATUS);
format_defaults(ft, c, c->session, c->session->curw, wp);
if (wp == w->active)
style_apply(&gc, w->options, "pane-active-border-style", ft);
else
style_apply(&gc, w->options, "pane-border-style", ft);
fmt = options_get_string(w->options, "pane-border-format");
expanded = format_expand_time(ft, fmt);
if (wp->sx < 4)
wp->status_size = width = 0;
else
wp->status_size = width = wp->sx - 4;
memcpy(&old, &wp->status_screen, sizeof old);
screen_init(&wp->status_screen, width, 1, 0);
wp->status_screen.mode = 0;
screen_write_start(&ctx, NULL, &wp->status_screen);
gc.attr |= GRID_ATTR_CHARSET;
for (i = 0; i < width; i++)
screen_write_putc(&ctx, &gc, 'q');
gc.attr &= ~GRID_ATTR_CHARSET;
screen_write_cursormove(&ctx, 0, 0, 0);
format_draw(&ctx, &gc, width, expanded, NULL);
screen_write_stop(&ctx);
free(expanded);
format_free(ft);
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 screen_redraw_ctx *ctx)
{
struct client *c = ctx->c;
struct window *w = c->session->curw->window;
struct tty *tty = &c->tty;
struct window_pane *wp;
struct screen *s;
u_int i, x, width, xoff, yoff, size;
log_debug("%s: %s @%u", __func__, c->name, w->id);
TAILQ_FOREACH(wp, &w->panes, entry) {
if (!window_pane_visible(wp))
continue;
s = &wp->status_screen;
size = wp->status_size;
if (ctx->pane_status == PANE_STATUS_TOP)
yoff = wp->yoff - 1;
else
yoff = wp->yoff + wp->sy;
xoff = wp->xoff + 2;
if (xoff + size <= ctx->ox ||
xoff >= ctx->ox + ctx->sx ||
yoff < ctx->oy ||
yoff >= ctx->oy + ctx->sy)
continue;
if (xoff >= ctx->ox && xoff + size <= ctx->ox + ctx->sx) {
/* All visible. */
i = 0;
x = xoff - ctx->ox;
width = size;
} else if (xoff < ctx->ox && xoff + size > ctx->ox + ctx->sx) {
/* Both left and right not visible. */
i = ctx->ox;
x = 0;
width = ctx->sx;
} else if (xoff < ctx->ox) {
/* Left not visible. */
i = ctx->ox - xoff;
x = 0;
width = size - i;
} else {
/* Right not visible. */
i = 0;
x = xoff - ctx->ox;
width = size - x;
}
if (ctx->statustop)
yoff += ctx->statuslines;
tty_draw_line(tty, NULL, s, i, 0, width, x, yoff - ctx->oy);
}
tty_cursor(tty, 0, 0);
}
/* Update status line and change flags if unchanged. */
static int
screen_redraw_update(struct client *c, int flags)
{
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 && (~flags & CLIENT_REDRAWSTATUSALWAYS))
flags &= ~CLIENT_REDRAWSTATUS;
if (c->overlay_draw != NULL)
flags |= CLIENT_REDRAWOVERLAY;
if (options_get_number(wo, "pane-border-status") != PANE_STATUS_OFF) {
redraw = 0;
TAILQ_FOREACH(wp, &w->panes, entry) {
if (screen_redraw_make_pane_status(c, w, wp))
redraw = 1;
}
if (redraw)
flags |= CLIENT_REDRAWBORDERS;
}
return (flags);
}
/* Set up redraw context. */
static void
screen_redraw_set_context(struct client *c, struct screen_redraw_ctx *ctx)
{
struct session *s = c->session;
struct options *oo = s->options;
struct window *w = s->curw->window;
struct options *wo = w->options;
u_int lines;
memset(ctx, 0, sizeof *ctx);
ctx->c = c;
lines = status_line_size(c);
if (c->message_string != NULL || c->prompt_string != NULL)
lines = (lines == 0) ? 1 : lines;
if (lines != 0 && options_get_number(oo, "status-position") == 0)
ctx->statustop = 1;
ctx->statuslines = lines;
ctx->pane_status = options_get_number(wo, "pane-border-status");
tty_window_offset(&c->tty, &ctx->ox, &ctx->oy, &ctx->sx, &ctx->sy);
log_debug("%s: %s @%u ox=%u oy=%u sx=%u sy=%u %u/%d", __func__, c->name,
w->id, ctx->ox, ctx->oy, ctx->sx, ctx->sy, ctx->statuslines,
ctx->statustop);
}
/* Redraw entire screen. */
void
screen_redraw_screen(struct client *c)
{
struct screen_redraw_ctx ctx;
int flags;
if (c->flags & CLIENT_SUSPENDED)
return;
flags = screen_redraw_update(c, c->flags);
if ((flags & CLIENT_ALLREDRAWFLAGS) == 0)
return;
screen_redraw_set_context(c, &ctx);
tty_update_mode(&c->tty, c->tty.mode, NULL);
tty_sync_start(&c->tty);
if (flags & (CLIENT_REDRAWWINDOW|CLIENT_REDRAWBORDERS)) {
log_debug("%s: redrawing borders", c->name);
if (ctx.pane_status != PANE_STATUS_OFF)
screen_redraw_draw_pane_status(&ctx);
screen_redraw_draw_borders(&ctx);
}
if (flags & CLIENT_REDRAWWINDOW) {
log_debug("%s: redrawing panes", c->name);
screen_redraw_draw_panes(&ctx);
}
if (ctx.statuslines != 0 &&
(flags & (CLIENT_REDRAWSTATUS|CLIENT_REDRAWSTATUSALWAYS))) {
log_debug("%s: redrawing status", c->name);
screen_redraw_draw_status(&ctx);
}
if (c->overlay_draw != NULL && (flags & CLIENT_REDRAWOVERLAY)) {
log_debug("%s: redrawing overlay", c->name);
c->overlay_draw(c, &ctx);
}
tty_reset(&c->tty);
}
/* Redraw a single pane. */
void
screen_redraw_pane(struct client *c, struct window_pane *wp)
{
struct screen_redraw_ctx ctx;
if (c->overlay_draw != NULL || !window_pane_visible(wp))
return;
screen_redraw_set_context(c, &ctx);
tty_update_mode(&c->tty, c->tty.mode, NULL);
tty_sync_start(&c->tty);
screen_redraw_draw_pane(&ctx, wp);
tty_reset(&c->tty);
}
/* Get border cell style. */
static const struct grid_cell *
screen_redraw_draw_borders_style(struct screen_redraw_ctx *ctx, u_int x,
u_int y, struct window_pane *wp)
{
struct client *c = ctx->c;
struct session *s = c->session;
struct window *w = s->curw->window;
struct options *oo = w->options;
struct grid_cell *gc;
struct format_tree *ft;
if (wp->border_gc_set)
return (&wp->border_gc);
wp->border_gc_set = 1;
ft = format_create_defaults(NULL, c, s, s->curw, wp);
gc = &wp->border_gc;
if (screen_redraw_check_is(x, y, ctx->pane_status, w->active)) {
style_apply(gc, oo, "pane-active-border-style", ft);
gc->attr |= GRID_ATTR_CHARSET;
} else {
style_apply(gc, oo, "pane-border-style", ft);
gc->attr |= GRID_ATTR_CHARSET;
}
format_free(ft);
return (gc);
}
/* Draw a border cell. */
static void
screen_redraw_draw_borders_cell(struct screen_redraw_ctx *ctx, u_int i, u_int j)
{
struct client *c = ctx->c;
struct session *s = c->session;
struct tty *tty = &c->tty;
struct window_pane *wp;
u_int type, x = ctx->ox + i, y = ctx->oy + j;
const struct grid_cell *gc;
struct grid_cell copy;
if (c->overlay_check != NULL && !c->overlay_check(c, x, y))
return;
type = screen_redraw_check_cell(c, x, y, ctx->pane_status, &wp);
if (type == CELL_INSIDE)
return;
gc = screen_redraw_draw_borders_style(ctx, x, y, wp);
if (gc == NULL)
return;
if (server_is_marked(s, s->curw, marked_pane.wp) &&
screen_redraw_check_is(x, y, ctx->pane_status, marked_pane.wp)) {
memcpy(&copy, gc, sizeof copy);
copy.attr ^= GRID_ATTR_REVERSE;
gc = &copy;
}
tty_attributes(tty, gc, NULL);
if (ctx->statustop)
tty_cursor(tty, i, ctx->statuslines + j);
else
tty_cursor(tty, i, j);
tty_putc(tty, CELL_BORDERS[type]);
}
/* Draw the borders. */
static void
screen_redraw_draw_borders(struct screen_redraw_ctx *ctx)
{
struct client *c = ctx->c;
struct session *s = c->session;
struct window *w = s->curw->window;
struct window_pane *wp;
u_int i, j;
log_debug("%s: %s @%u", __func__, c->name, w->id);
TAILQ_FOREACH(wp, &w->panes, entry)
wp->border_gc_set = 0;
for (j = 0; j < c->tty.sy - ctx->statuslines; j++) {
for (i = 0; i < c->tty.sx; i++)
screen_redraw_draw_borders_cell(ctx, i, j);
}
}
/* Draw the panes. */
static void
screen_redraw_draw_panes(struct screen_redraw_ctx *ctx)
{
struct client *c = ctx->c;
struct window *w = c->session->curw->window;
struct window_pane *wp;
log_debug("%s: %s @%u", __func__, c->name, w->id);
TAILQ_FOREACH(wp, &w->panes, entry) {
if (window_pane_visible(wp))
screen_redraw_draw_pane(ctx, wp);
}
}
/* Draw the status line. */
static void
screen_redraw_draw_status(struct screen_redraw_ctx *ctx)
{
struct client *c = ctx->c;
struct window *w = c->session->curw->window;
struct tty *tty = &c->tty;
struct screen *s = c->status.active;
u_int i, y;
log_debug("%s: %s @%u", __func__, c->name, w->id);
if (ctx->statustop)
y = 0;
else
y = c->tty.sy - ctx->statuslines;
for (i = 0; i < ctx->statuslines; i++)
tty_draw_line(tty, NULL, s, 0, i, UINT_MAX, 0, y + i);
}
/* Draw one pane. */
static void
screen_redraw_draw_pane(struct screen_redraw_ctx *ctx, struct window_pane *wp)
{
struct client *c = ctx->c;
struct window *w = c->session->curw->window;
struct tty *tty = &c->tty;
struct screen *s;
u_int i, j, top, x, y, width;
log_debug("%s: %s @%u %%%u", __func__, c->name, w->id, wp->id);
if (wp->xoff + wp->sx <= ctx->ox || wp->xoff >= ctx->ox + ctx->sx)
return;
if (ctx->statustop)
top = ctx->statuslines;
else
top = 0;
s = wp->screen;
for (j = 0; j < wp->sy; j++) {
if (wp->yoff + j < ctx->oy || wp->yoff + j >= ctx->oy + ctx->sy)
continue;
y = top + wp->yoff + j - ctx->oy;
if (wp->xoff >= ctx->ox &&
wp->xoff + wp->sx <= ctx->ox + ctx->sx) {
/* All visible. */
i = 0;
x = wp->xoff - ctx->ox;
width = wp->sx;
} else if (wp->xoff < ctx->ox &&
wp->xoff + wp->sx > ctx->ox + ctx->sx) {
/* Both left and right not visible. */
i = ctx->ox;
x = 0;
width = ctx->sx;
} else if (wp->xoff < ctx->ox) {
/* Left not visible. */
i = ctx->ox - wp->xoff;
x = 0;
width = wp->sx - i;
} else {
/* Right not visible. */
i = 0;
x = wp->xoff - ctx->ox;
width = ctx->sx - x;
}
log_debug("%s: %s %%%u line %u,%u at %u,%u, width %u",
__func__, c->name, wp->id, i, j, x, y, width);
tty_draw_line(tty, wp, s, i, j, width, x, y);
}
}