tmux/status.c

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2009-01-14 19:29:32 +00:00
/* $Id: status.c,v 1.62 2009-01-14 19:29:32 nicm Exp $ */
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/*
* 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 <sys/time.h>
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#include <errno.h>
#include <limits.h>
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#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
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#include <time.h>
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#include "tmux.h"
char *status_replace(struct session *, char *, time_t);
size_t status_width(struct winlink *);
char *status_print(struct session *, struct winlink *, struct grid_cell *);
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void status_prompt_add_history(struct client *);
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char *status_prompt_complete(const char *);
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/* Draw status for client on the last lines of given context. */
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void
status_redraw(struct client *c)
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{
struct screen_write_ctx ctx;
struct session *s = c->session;
struct winlink *wl;
struct window_pane *wp;
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struct screen *sc;
char *left, *right, *text, *ptr;
size_t llen, rlen, offset, xx, yy, sy;
size_t size, start, width;
struct grid_cell gc;
int larrow, rarrow;
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left = right = NULL;
if (c->sy == 0 || !options_get_number(&s->options, "status"))
goto off;
larrow = rarrow = 0;
if (gettimeofday(&c->status_timer, NULL) != 0)
fatal("gettimeofday");
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memcpy(&gc, &grid_default_cell, sizeof gc);
gc.fg = options_get_number(&s->options, "status-fg");
gc.bg = options_get_number(&s->options, "status-bg");
yy = c->sy - 1;
if (yy == 0)
goto blank;
left = status_replace(s, options_get_string(
&s->options, "status-left"), c->status_timer.tv_sec);
llen = options_get_number(&s->options, "status-left-length");
if (strlen(left) < llen)
llen = strlen(left);
left[llen] = '\0';
right = status_replace(s, options_get_string(
&s->options, "status-right"), c->status_timer.tv_sec);
rlen = options_get_number(&s->options, "status-right-length");
if (strlen(right) < rlen)
rlen = strlen(right);
right[rlen] = '\0';
/*
* Figure out how much space we have for the window list. If there isn't
* enough space, just wimp out.
*/
xx = 0;
if (llen != 0)
xx += llen + 1;
if (rlen != 0)
xx += rlen + 1;
if (c->sx == 0 || c->sx <= xx)
goto blank;
xx = c->sx - xx;
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/*
* Right. We have xx characters to fill. Find out how much is to go in
* them and the offset of the current window (it must be on screen).
*/
width = offset = 0;
RB_FOREACH(wl, winlinks, &s->windows) {
size = status_width(wl) + 1;
if (wl == s->curw)
offset = width;
width += size;
}
start = 0;
/* If there is enough space for the total width, all is gravy. */
if (width <= xx)
goto draw;
/* Find size of current window text. */
size = status_width(s->curw);
/*
* If the offset is already on screen, we're good to draw from the
* start and just leave off the end.
*/
if (offset + size < xx) {
if (xx > 0) {
rarrow = 1;
xx--;
}
width = xx;
goto draw;
}
/*
* Work out how many characters we need to omit from the start. There
* are xx characters to fill, and offset + size must be the last. So,
* the start character is offset + size - xx.
*/
if (xx > 0) {
larrow = 1;
xx--;
}
start = offset + size - xx;
if (xx > 0 && width > start + xx + 1) { /* + 1, eh? */
rarrow = 1;
start++;
xx--;
}
width = xx;
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draw:
/* Resize the target screen. */
if (screen_size_x(&c->status) != c->sx) {
screen_free(&c->status);
screen_init(&c->status, c->sx, 1, 0);
}
/* Bail here if anything is too small too. XXX. */
if (width == 0 || xx == 0)
goto blank;
/* Begin drawing and move to the starting position. */
screen_write_start(&ctx, NULL, &c->status);
if (llen != 0) {
screen_write_cursormove(&ctx, 0, yy);
screen_write_puts(&ctx, &gc, "%s ", left);
if (larrow)
screen_write_putc(&ctx, &gc, ' ');
} else {
if (larrow)
screen_write_cursormove(&ctx, 1, yy);
else
screen_write_cursormove(&ctx, 0, yy);
}
/* Draw each character in succession. */
offset = 0;
RB_FOREACH(wl, winlinks, &s->windows) {
text = status_print(s, wl, &gc);
if (larrow == 1 && offset < start) {
if (session_alert_has(s, wl, WINDOW_ACTIVITY))
larrow = -1;
if (session_alert_has(s, wl, WINDOW_BELL))
larrow = -1;
}
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for (ptr = text; *ptr != '\0'; ptr++) {
if (offset >= start && offset < start + width)
screen_write_putc(&ctx, &gc, *ptr);
offset++;
}
if (rarrow == 1 && offset > start + width) {
if (session_alert_has(s, wl, WINDOW_ACTIVITY))
rarrow = -1;
if (session_alert_has(s, wl, WINDOW_BELL))
rarrow = -1;
}
gc.attr &= ~GRID_ATTR_REVERSE;
if (offset < start + width) {
if (offset >= start) {
screen_write_putc(&ctx, &gc, ' ');
}
offset++;
}
xfree(text);
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}
/* Fill the remaining space if any. */
while (offset++ < xx)
screen_write_putc(&ctx, &gc, ' ');
/* Draw the last item. */
if (rlen != 0) {
screen_write_cursormove(&ctx, c->sx - rlen - 1, yy);
screen_write_puts(&ctx, &gc, " %s", right);
}
/* Draw the arrows. */
if (larrow != 0) {
if (larrow == -1)
gc.attr |= GRID_ATTR_REVERSE;
else
gc.attr &= ~GRID_ATTR_REVERSE;
if (llen != 0)
screen_write_cursormove(&ctx, llen + 1, yy);
else
screen_write_cursormove(&ctx, 0, yy);
screen_write_putc(&ctx, &gc, '<');
gc.attr &= ~GRID_ATTR_REVERSE;
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}
if (rarrow != 0) {
if (rarrow == -1)
gc.attr |= GRID_ATTR_REVERSE;
else
gc.attr &= ~GRID_ATTR_REVERSE;
if (rlen != 0)
screen_write_cursormove(&ctx, c->sx - rlen - 2, yy);
else
screen_write_cursormove(&ctx, c->sx - 1, yy);
screen_write_putc(&ctx, &gc, '>');
gc.attr &= ~GRID_ATTR_REVERSE;
}
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goto out;
blank:
/* Just draw the whole line as blank. */
screen_write_start(&ctx, NULL, &c->status);
screen_write_cursormove(&ctx, 0, yy);
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for (offset = 0; offset < c->sx; offset++)
screen_write_putc(&ctx, &gc, ' ');
goto out;
off:
/*
* Draw the real window last line. Necessary to wipe over message if
* status is off. Not sure this is the right place for this.
*/
screen_write_start(&ctx, NULL, &c->status);
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sy = 0;
TAILQ_FOREACH(wp, &s->curw->window->panes, entry) {
sy += wp->sy;
sc = wp->screen;
}
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sy++;
screen_write_cursormove(&ctx, 0, 0);
if (sy < c->sy - 1) {
/* If the screen is too small, use blank. */
for (offset = 0; offset < c->sx; offset++)
screen_write_putc(&ctx, &gc, ' ');
} else {
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screen_write_copy(&ctx,
sc, 0, sc->grid->hsize + screen_size_y(sc) - 1, c->sx, 1);
}
out:
screen_write_stop(&ctx);
if (left != NULL)
xfree(left);
if (right != NULL)
xfree(right);
}
char *
status_replace(struct session *s, char *fmt, time_t t)
{
struct winlink *wl = s->curw;
static char out[BUFSIZ];
char in[BUFSIZ], ch, *iptr, *optr, *ptr, *endptr;
size_t len;
long n;
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strftime(in, sizeof in, fmt, localtime(&t));
in[(sizeof in) - 1] = '\0';
iptr = in;
optr = out;
while (*iptr != '\0') {
if (optr >= out + (sizeof out) - 1)
break;
switch (ch = *iptr++) {
case '#':
errno = 0;
n = strtol(iptr, &endptr, 10);
if ((n == 0 && errno != EINVAL) ||
(n == LONG_MIN && errno != ERANGE) ||
(n == LONG_MAX && errno != ERANGE) ||
n != 0)
iptr = endptr;
if (n <= 0)
n = LONG_MAX;
switch (*iptr++) {
case 'T':
ptr = wl->window->active->base.title;
len = strlen(ptr);
if ((size_t) n < len)
len = n;
if (optr + len >= out + (sizeof out) - 1)
break;
while (len > 0 && *ptr != '\0') {
*optr++ = *ptr++;
len--;
}
break;
case '#':
*optr++ = '#';
break;
}
break;
default:
*optr++ = ch;
break;
}
}
*optr = '\0';
return (xstrdup(out));
}
size_t
status_width(struct winlink *wl)
{
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#ifndef BROKEN_VSNPRINTF
return (xsnprintf(NULL, 0, "%d:%s ", wl->idx, wl->window->name));
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#else
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char *s;
size_t n;
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xasprintf(&s, "%d:%s ", wl->idx, wl->window->name);
n = strlen(s);
xfree(s);
return (n);
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#endif
}
char *
status_print(struct session *s, struct winlink *wl, struct grid_cell *gc)
{
char *text, flag;
flag = ' ';
if (wl == SLIST_FIRST(&s->lastw))
flag = '-';
if (wl == s->curw)
flag = '*';
gc->attr &= ~GRID_ATTR_REVERSE;
if (session_alert_has(s, wl, WINDOW_ACTIVITY)) {
flag = '#';
gc->attr |= GRID_ATTR_REVERSE;
}
if (session_alert_has(s, wl, WINDOW_BELL)) {
flag = '!';
gc->attr |= GRID_ATTR_REVERSE;
}
xasprintf(&text, "%d:%s%c", wl->idx, wl->window->name, flag);
return (text);
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}
/* Draw client message on status line of present else on last line. */
void
status_message_redraw(struct client *c)
{
struct screen_write_ctx ctx;
struct session *s = c->session;
size_t len;
struct grid_cell gc;
if (c->sx == 0 || c->sy == 0)
return;
if (screen_size_x(&c->status) != c->sx) {
screen_free(&c->status);
screen_init(&c->status, c->sx, 1, 0);
}
len = strlen(c->message_string);
if (len > c->sx)
len = c->sx;
memcpy(&gc, &grid_default_cell, sizeof gc);
gc.fg = options_get_number(&s->options, "message-fg");
gc.bg = options_get_number(&s->options, "message-bg");
screen_write_start(&ctx, NULL, &c->status);
screen_write_cursormove(&ctx, 0, 0);
screen_write_puts(&ctx, &gc, "%.*s", (int) len, c->message_string);
for (; len < c->sx; len++)
screen_write_putc(&ctx, &gc, ' ');
screen_write_stop(&ctx);
}
/* Draw client prompt on status line of present else on last line. */
void
status_prompt_redraw(struct client *c)
{
struct screen_write_ctx ctx;
struct session *s = c->session;
size_t i, size, left, len, offset, n;
char ch;
struct grid_cell gc;
if (c->sx == 0 || c->sy == 0)
return;
if (screen_size_x(&c->status) != c->sx) {
screen_free(&c->status);
screen_init(&c->status, c->sx, 1, 0);
}
offset = 0;
len = strlen(c->prompt_string);
if (len > c->sx)
len = c->sx;
memcpy(&gc, &grid_default_cell, sizeof gc);
gc.fg = options_get_number(&s->options, "message-fg");
gc.bg = options_get_number(&s->options, "message-bg");
screen_write_start(&ctx, NULL, &c->status);
screen_write_cursormove(&ctx, 0, 0);
screen_write_puts(&ctx, &gc, "%.*s", (int) len, c->prompt_string);
left = c->sx - len;
if (left != 0) {
if (c->prompt_index < left)
size = strlen(c->prompt_buffer);
else {
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offset = c->prompt_index - left - 1;
if (c->prompt_index == strlen(c->prompt_buffer))
left--;
size = left;
}
if (c->prompt_hidden) {
n = strlen(c->prompt_buffer);
if (n > left)
n = left;
for (i = 0; i < n; i++)
screen_write_putc(&ctx, &gc, '*');
} else {
screen_write_puts(&ctx, &gc,
"%.*s", (int) left, c->prompt_buffer + offset);
}
for (i = len + size; i < c->sx; i++)
screen_write_putc(&ctx, &gc, ' ');
}
/* Draw a fake cursor. */
screen_write_cursormove(&ctx, len + c->prompt_index - offset, 0);
if (c->prompt_index == strlen(c->prompt_buffer))
ch = ' ';
else
ch = c->prompt_buffer[c->prompt_index];
if (ch == '\0')
ch = ' ';
gc.bg = gc.fg;
gc.fg = options_get_number(&s->options, "message-bg");
screen_write_putc(&ctx, &gc, ch);
screen_write_stop(&ctx);
}
/* Handle keys in prompt. */
void
status_prompt_key(struct client *c, int key)
{
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char *s, *first, *last;
size_t size, n, off, idx;
char word[64];
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/* XXX This function needs some tidying... */
size = strlen(c->prompt_buffer);
switch (key) {
case KEYC_LEFT:
if (c->prompt_index > 0) {
c->prompt_index--;
c->flags |= CLIENT_STATUS;
}
break;
case KEYC_RIGHT:
if (c->prompt_index < size) {
c->prompt_index++;
c->flags |= CLIENT_STATUS;
}
break;
case '\001': /* C-a */
if (c->prompt_index != 0) {
c->prompt_index = 0;
c->flags |= CLIENT_STATUS;
}
break;
case '\005': /* C-e */
if (c->prompt_index != size) {
c->prompt_index = size;
c->flags |= CLIENT_STATUS;
}
break;
case '\011':
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if (*c->prompt_buffer == '\0')
break;
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idx = c->prompt_index;
if (idx != 0)
idx--;
/* Find the word we are in. */
first = c->prompt_buffer + idx;
while (first > c->prompt_buffer && *first != ' ')
first--;
while (*first == ' ')
first++;
last = c->prompt_buffer + idx;
while (*last != '\0' && *last != ' ')
last++;
while (*last == ' ')
last--;
if (*last != '\0')
last++;
if (last <= first ||
((size_t) (last - first)) > (sizeof word) - 1)
break;
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memcpy(word, first, last - first);
word[last - first] = '\0';
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/* And try to complete it. */
if ((s = status_prompt_complete(word)) == NULL)
break;
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/* Trim out word. */
n = size - (last - c->prompt_buffer) + 1; /* with \0 */
memmove(first, last, n);
size -= last - first;
/* Insert the new word. */
size += strlen(s);
off = first - c->prompt_buffer;
c->prompt_buffer = xrealloc(c->prompt_buffer, 1, size + 1);
first = c->prompt_buffer + off;
memmove(first + strlen(s), first, n);
memcpy(first, s, strlen(s));
c->prompt_index = (first - c->prompt_buffer) + strlen(s);
c->flags |= CLIENT_STATUS;
break;
case '\010':
case '\177':
if (c->prompt_index != 0) {
if (c->prompt_index == size)
c->prompt_buffer[--c->prompt_index] = '\0';
else {
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memmove(c->prompt_buffer + c->prompt_index - 1,
c->prompt_buffer + c->prompt_index,
size + 1 - c->prompt_index);
c->prompt_index--;
}
c->flags |= CLIENT_STATUS;
}
break;
case KEYC_DC:
if (c->prompt_index != size) {
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memmove(c->prompt_buffer + c->prompt_index,
c->prompt_buffer + c->prompt_index + 1,
size + 1 - c->prompt_index);
c->flags |= CLIENT_STATUS;
}
break;
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case KEYC_UP:
if (ARRAY_LENGTH(&c->prompt_hdata) == 0)
break;
xfree(c->prompt_buffer);
c->prompt_buffer = xstrdup(ARRAY_ITEM(&c->prompt_hdata,
ARRAY_LENGTH(&c->prompt_hdata) - 1 - c->prompt_hindex));
if (c->prompt_hindex != ARRAY_LENGTH(&c->prompt_hdata) - 1)
c->prompt_hindex++;
c->prompt_index = strlen(c->prompt_buffer);
c->flags |= CLIENT_STATUS;
break;
case KEYC_DOWN:
xfree(c->prompt_buffer);
if (c->prompt_hindex != 0) {
c->prompt_hindex--;
c->prompt_buffer = xstrdup(ARRAY_ITEM(
&c->prompt_hdata, ARRAY_LENGTH(
&c->prompt_hdata) - 1 - c->prompt_hindex));
} else
c->prompt_buffer = xstrdup("");
c->prompt_index = strlen(c->prompt_buffer);
c->flags |= CLIENT_STATUS;
break;
case '\r': /* enter */
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if (*c->prompt_buffer != '\0') {
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status_prompt_add_history(c);
if (c->prompt_callback(
c->prompt_data, c->prompt_buffer) == 0)
server_clear_client_prompt(c);
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break;
}
/* FALLTHROUGH */
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case '\033': /* escape */
if (c->prompt_callback(c->prompt_data, NULL) == 0)
server_clear_client_prompt(c);
break;
default:
if (key < 32)
break;
c->prompt_buffer = xrealloc(c->prompt_buffer, 1, size + 2);
if (c->prompt_index == size) {
c->prompt_buffer[c->prompt_index++] = key;
c->prompt_buffer[c->prompt_index] = '\0';
} else {
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memmove(c->prompt_buffer + c->prompt_index + 1,
c->prompt_buffer + c->prompt_index,
size + 1 - c->prompt_index);
c->prompt_buffer[c->prompt_index++] = key;
}
c->flags |= CLIENT_STATUS;
break;
}
}
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/* Add line to the history. */
void
status_prompt_add_history(struct client *c)
{
if (ARRAY_LENGTH(&c->prompt_hdata) > 0 &&
strcmp(ARRAY_LAST(&c->prompt_hdata), c->prompt_buffer) == 0)
return;
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if (ARRAY_LENGTH(&c->prompt_hdata) == PROMPT_HISTORY) {
xfree(ARRAY_FIRST(&c->prompt_hdata));
ARRAY_REMOVE(&c->prompt_hdata, 0);
}
ARRAY_ADD(&c->prompt_hdata, xstrdup(c->prompt_buffer));
}
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/* Complete word. */
char *
status_prompt_complete(const char *s)
{
const struct cmd_entry **cmdent;
const struct set_option_entry *optent;
ARRAY_DECL(, const char *) list;
char *prefix, *s2;
u_int i;
size_t j;
if (*s == '\0')
return (NULL);
/* First, build a list of all the possible matches. */
ARRAY_INIT(&list);
for (cmdent = cmd_table; *cmdent != NULL; cmdent++) {
if (strncmp((*cmdent)->name, s, strlen(s)) == 0)
ARRAY_ADD(&list, (*cmdent)->name);
}
for (i = 0; i < NSETOPTION; i++) {
optent = &set_option_table[i];
if (strncmp(optent->name, s, strlen(s)) == 0)
ARRAY_ADD(&list, optent->name);
}
for (i = 0; i < NSETWINDOWOPTION; i++) {
optent = &set_window_option_table[i];
if (strncmp(optent->name, s, strlen(s)) == 0)
ARRAY_ADD(&list, optent->name);
}
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/* If none, bail now. */
if (ARRAY_LENGTH(&list) == 0) {
ARRAY_FREE(&list);
return (NULL);
}
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/* If an exact match, return it, with a trailing space. */
if (ARRAY_LENGTH(&list) == 1) {
xasprintf(&s2, "%s ", ARRAY_FIRST(&list));
ARRAY_FREE(&list);
return (s2);
}
/* Now loop through the list and find the longest common prefix. */
prefix = xstrdup(ARRAY_FIRST(&list));
for (i = 1; i < ARRAY_LENGTH(&list); i++) {
s = ARRAY_ITEM(&list, i);
j = strlen(s);
if (j > strlen(prefix))
j = strlen(prefix);
for (; j > 0; j--) {
if (prefix[j - 1] != s[j - 1])
prefix[j - 1] = '\0';
}
}
ARRAY_FREE(&list);
return (prefix);
}