server-window.c

   1 /* $OpenBSD$ */
   2
   3 /*
   4  * Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
  15  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
  16  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 #include <sys/types.h>
  20
  21 #include <event.h>
  22 #include <unistd.h>
  23
  24 #include "tmux.h"
  25
  26 int     server_window_backoff(struct window_pane *);
  27 int     server_window_check_bell(struct session *, struct winlink *);
  28 int     server_window_check_activity(struct session *, struct winlink *);
  29 int     server_window_check_content(
  30             struct session *, struct winlink *, struct window_pane *);
  31
  32 /* Check if this window should suspend reading. */
  33 int
  34 server_window_backoff(struct window_pane *wp)
  35 {
  36         struct client   *c;
  37         u_int            i;
  38
  39         if (!window_pane_visible(wp))
  40                 return (0);
  41
  42         for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
  43                 c = ARRAY_ITEM(&clients, i);
  44                 if (c == NULL || c->session == NULL)
  45                         continue;
  46                 if ((c->flags & (CLIENT_SUSPENDED|CLIENT_DEAD)) != 0)
  47                         continue;
  48                 if (c->session->curw->window != wp->window)
  49                         continue;
  50
  51                 if (EVBUFFER_LENGTH(c->tty.event->output) > BACKOFF_THRESHOLD)
  52                         return (1);
  53         }
  54         return (0);
  55 }
  56
  57 /* Window functions that need to happen every loop. */
  58 void
  59 server_window_loop(void)
  60 {
  61         struct window           *w;
  62         struct winlink          *wl;
  63         struct window_pane      *wp;
  64         struct session          *s;
  65         u_int                    i, j;
  66
  67         for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
  68                 w = ARRAY_ITEM(&windows, i);
  69                 if (w == NULL)
  70                         continue;
  71
  72                 TAILQ_FOREACH(wp, &w->panes, entry) {
  73                         if (wp->fd == -1)
  74                                 continue;
  75                         if (!(wp->flags & PANE_FREEZE)) {
  76                                 if (server_window_backoff(wp))
  77                                         bufferevent_disable(wp->event, EV_READ);
  78                                 else
  79                                         bufferevent_enable(wp->event, EV_READ);
  80                         }
  81                 }
  82
  83                 for (j = 0; j < ARRAY_LENGTH(&sessions); j++) {
  84                         s = ARRAY_ITEM(&sessions, j);
  85                         if (s == NULL)
  86                                 continue;
  87                         wl = session_has(s, w);
  88                         if (wl == NULL)
  89                                 continue;
  90
  91                         if (server_window_check_bell(s, wl) ||
  92                             server_window_check_activity(s, wl))
  93                                 server_status_session(s);
  94                         TAILQ_FOREACH(wp, &w->panes, entry)
  95                                 server_window_check_content(s, wl, wp);
  96                 }
  97                 w->flags &= ~(WINDOW_BELL|WINDOW_ACTIVITY);
  98         }
  99 }
 100
 101 /* Check for bell in window. */
 102 int
 103 server_window_check_bell(struct session *s, struct winlink *wl)
 104 {
 105         struct client   *c;
 106         struct window   *w = wl->window;
 107         u_int            i;
 108         int              action, visual;
 109
 110         if (!(w->flags & WINDOW_BELL) || wl->flags & WINLINK_BELL)
 111                 return (0);
 112         if (s->curw != wl)
 113                 wl->flags |= WINLINK_BELL;
 114
 115         action = options_get_number(&s->options, "bell-action");
 116         switch (action) {
 117         case BELL_ANY:
 118                 if (s->flags & SESSION_UNATTACHED)
 119                         break;
 120                 visual = options_get_number(&s->options, "visual-bell");
 121                 for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
 122                         c = ARRAY_ITEM(&clients, i);
 123                         if (c == NULL || c->session != s)
 124                                 continue;
 125                         if (!visual) {
 126                                 tty_putcode(&c->tty, TTYC_BEL);
 127                                 continue;
 128                         }
 129                         if (c->session->curw->window == w) {
 130                                 status_message_set(c, "Bell in current window");
 131                                 continue;
 132                         }
 133                         status_message_set(c, "Bell in window %u",
 134                             winlink_find_by_window(&s->windows, w)->idx);
 135                 }
 136                 break;
 137         case BELL_CURRENT:
 138                 if (s->flags & SESSION_UNATTACHED)
 139                         break;
 140                 visual = options_get_number(&s->options, "visual-bell");
 141                 for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
 142                         c = ARRAY_ITEM(&clients, i);
 143                         if (c == NULL || c->session != s)
 144                                 continue;
 145                         if (c->session->curw->window != w)
 146                                 continue;
 147                         if (!visual) {
 148                                 tty_putcode(&c->tty, TTYC_BEL);
 149                                 continue;
 150                         }
 151                         status_message_set(c, "Bell in current window");
 152                 }
 153                 break;
 154         }
 155
 156         return (1);
 157 }
 158
 159 /* Check for activity in window. */
 160 int
 161 server_window_check_activity(struct session *s, struct winlink *wl)
 162 {
 163         struct client   *c;
 164         struct window   *w = wl->window;
 165         u_int            i;
 166
 167         if (!(w->flags & WINDOW_ACTIVITY) || wl->flags & WINLINK_ACTIVITY)
 168                 return (0);
 169         if (s->curw == wl)
 170                 return (0);
 171
 172         if (!options_get_number(&w->options, "monitor-activity"))
 173                 return (0);
 174
 175         wl->flags |= WINLINK_ACTIVITY;
 176
 177         if (options_get_number(&s->options, "visual-activity")) {
 178                 for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
 179                         c = ARRAY_ITEM(&clients, i);
 180                         if (c == NULL || c->session != s)
 181                                 continue;
 182                         status_message_set(c, "Activity in window %u",
 183                             winlink_find_by_window(&s->windows, w)->idx);
 184                 }
 185         }
 186
 187         return (1);
 188 }
 189
 190 /* Check for content change in window. */
 191 int
 192 server_window_check_content(
 193     struct session *s, struct winlink *wl, struct window_pane *wp)
 194 {
 195         struct client   *c;
 196         struct window   *w = wl->window;
 197         u_int            i;
 198         char            *found, *ptr;
 199
 200         /* Activity flag must be set for new content. */
 201         if (!(w->flags & WINDOW_ACTIVITY) || wl->flags & WINLINK_CONTENT)
 202                 return (0);
 203         if (s->curw == wl)
 204                 return (0);
 205
 206         ptr = options_get_string(&w->options, "monitor-content");
 207         if (ptr == NULL || *ptr == '\0')
 208                 return (0);
 209         if ((found = window_pane_search(wp, ptr, NULL)) == NULL)
 210                 return (0);
 211         xfree(found);
 212
 213         wl->flags |= WINLINK_CONTENT;
 214
 215         if (options_get_number(&s->options, "visual-content")) {
 216                 for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
 217                         c = ARRAY_ITEM(&clients, i);
 218                         if (c == NULL || c->session != s)
 219                                 continue;
 220                         status_message_set(c, "Content in window %u",
 221                             winlink_find_by_window(&s->windows, w)->idx);
 222                 }
 223         }
 224
 225         return (1);
 226 }