server-window.c

   1 /* $Id: server-window.c,v 1.14 2010-02-26 13:26:44 tcunha Exp $ */
   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 window *);
  28 int     server_window_check_activity(struct session *, struct window *);
  29 int     server_window_check_content(
  30             struct session *, struct window *, 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 window_pane      *wp;
  63         struct session          *s;
  64         u_int                    i, j;
  65
  66         for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
  67                 w = ARRAY_ITEM(&windows, i);
  68                 if (w == NULL)
  69                         continue;
  70
  71                 TAILQ_FOREACH(wp, &w->panes, entry) {
  72                         if (wp->fd == -1)
  73                                 continue;
  74                         if (!(wp->flags & PANE_FREEZE)) {
  75                                 if (server_window_backoff(wp))
  76                                         bufferevent_disable(wp->event, EV_READ);
  77                                 else
  78                                         bufferevent_enable(wp->event, EV_READ);
  79                         }
  80                 }
  81
  82                 for (j = 0; j < ARRAY_LENGTH(&sessions); j++) {
  83                         s = ARRAY_ITEM(&sessions, j);
  84                         if (s == NULL || !session_has(s, w))
  85                                 continue;
  86
  87                         if (server_window_check_bell(s, w) ||
  88                             server_window_check_activity(s, w))
  89                                 server_status_session(s);
  90                         TAILQ_FOREACH(wp, &w->panes, entry)
  91                                 server_window_check_content(s, w, wp);
  92                 }
  93                 w->flags &= ~(WINDOW_BELL|WINDOW_ACTIVITY|WINDOW_CONTENT);
  94         }
  95 }
  96
  97 /* Check for bell in window. */
  98 int
  99 server_window_check_bell(struct session *s, struct window *w)
 100 {
 101         struct client   *c;
 102         u_int            i;
 103         int              action, visual;
 104
 105         if (!(w->flags & WINDOW_BELL))
 106                 return (0);
 107
 108         if (session_alert_has_window(s, w, WINDOW_BELL))
 109                 return (0);
 110         session_alert_add(s, w, WINDOW_BELL);
 111
 112         action = options_get_number(&s->options, "bell-action");
 113         switch (action) {
 114         case BELL_ANY:
 115                 if (s->flags & SESSION_UNATTACHED)
 116                         break;
 117                 visual = options_get_number(&s->options, "visual-bell");
 118                 for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
 119                         c = ARRAY_ITEM(&clients, i);
 120                         if (c == NULL || c->session != s)
 121                                 continue;
 122                         if (!visual) {
 123                                 tty_putcode(&c->tty, TTYC_BEL);
 124                                 continue;
 125                         }
 126                         if (c->session->curw->window == w) {
 127                                 status_message_set(c, "Bell in current window");
 128                                 continue;
 129                         }
 130                         status_message_set(c, "Bell in window %u",
 131                             winlink_find_by_window(&s->windows, w)->idx);
 132                 }
 133                 break;
 134         case BELL_CURRENT:
 135                 if (s->flags & SESSION_UNATTACHED)
 136                         break;
 137                 visual = options_get_number(&s->options, "visual-bell");
 138                 for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
 139                         c = ARRAY_ITEM(&clients, i);
 140                         if (c == NULL || c->session != s)
 141                                 continue;
 142                         if (c->session->curw->window != w)
 143                                 continue;
 144                         if (!visual) {
 145                                 tty_putcode(&c->tty, TTYC_BEL);
 146                                 continue;
 147                         }
 148                         status_message_set(c, "Bell in current window");
 149                 }
 150                 break;
 151         }
 152
 153         return (1);
 154 }
 155
 156 /* Check for activity in window. */
 157 int
 158 server_window_check_activity(struct session *s, struct window *w)
 159 {
 160         struct client   *c;
 161         u_int            i;
 162
 163         if (!(w->flags & WINDOW_ACTIVITY))
 164                 return (0);
 165         if (s->curw->window == w)
 166                 return (0);
 167
 168         if (!options_get_number(&w->options, "monitor-activity"))
 169                 return (0);
 170
 171         if (session_alert_has_window(s, w, WINDOW_ACTIVITY))
 172                 return (0);
 173         session_alert_add(s, w, WINDOW_ACTIVITY);
 174
 175         if (s->flags & SESSION_UNATTACHED)
 176                 return (0);
 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 window *w, struct window_pane *wp)
 194 {
 195         struct client   *c;
 196         u_int            i;
 197         char            *found, *ptr;
 198
 199         if (!(w->flags & WINDOW_ACTIVITY))      /* activity for new content */
 200                 return (0);
 201         if (s->curw->window == w)
 202                 return (0);
 203
 204         ptr = options_get_string(&w->options, "monitor-content");
 205         if (ptr == NULL || *ptr == '\0')
 206                 return (0);
 207
 208         if (session_alert_has_window(s, w, WINDOW_CONTENT))
 209                 return (0);
 210
 211         if ((found = window_pane_search(wp, ptr, NULL)) == NULL)
 212                 return (0);
 213         xfree(found);
 214
 215         session_alert_add(s, w, WINDOW_CONTENT);
 216         if (s->flags & SESSION_UNATTACHED)
 217                 return (0);
 218         if (options_get_number(&s->options, "visual-content")) {
 219                 for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
 220                         c = ARRAY_ITEM(&clients, i);
 221                         if (c == NULL || c->session != s)
 222                                 continue;
 223                         status_message_set(c, "Content in window %u",
 224                             winlink_find_by_window(&s->windows, w)->idx);
 225                 }
 226         }
 227
 228         return (1);
 229 }