mirror of
https://github.com/tmux/tmux.git
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dd36982ad5
Initial changes to move tmux to libevent. This moves the client-side loops are pretty much fully over to event-based only (tmux.c and client.c) but server-side (server.c and friends) treats libevent as a sort of clever poll, waking up after every event to run various things. Moving the server stuff over to bufferevents and timers and so on will come later.
347 lines
8.2 KiB
C
347 lines
8.2 KiB
C
/* $Id: server-window.c,v 1.5 2009-11-08 22:40:36 tcunha Exp $ */
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/*
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* Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <event.h>
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#include <unistd.h>
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#include "tmux.h"
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int server_window_backoff(struct window_pane *);
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int server_window_check_bell(struct session *, struct window *);
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int server_window_check_activity(struct session *, struct window *);
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int server_window_check_content(
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struct session *, struct window *, struct window_pane *);
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void server_window_check_alive(struct window *);
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/* Register windows for poll. */
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void
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server_window_prepare(void)
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{
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struct window *w;
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struct window_pane *wp;
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u_int i;
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int events;
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for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
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if ((w = ARRAY_ITEM(&windows, i)) == NULL)
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continue;
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TAILQ_FOREACH(wp, &w->panes, entry) {
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if (wp->fd == -1)
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continue;
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events = 0;
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if (!server_window_backoff(wp))
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events = EV_READ;
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if (BUFFER_USED(wp->out) > 0)
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events |= EV_WRITE;
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event_del(&wp->event);
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event_set(&wp->event,
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wp->fd, events, server_window_callback, wp);
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event_add(&wp->event, NULL);
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if (wp->pipe_fd == -1)
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continue;
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events = 0;
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if (BUFFER_USED(wp->pipe_buf) > 0)
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events |= EV_WRITE;
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event_del(&wp->pipe_event);
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event_set(&wp->pipe_event,
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wp->pipe_fd, events, server_window_callback, wp);
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event_add(&wp->pipe_event, NULL);
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}
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}
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}
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/* Check if this window should suspend reading. */
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int
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server_window_backoff(struct window_pane *wp)
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{
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struct client *c;
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u_int i;
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if (!window_pane_visible(wp))
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return (0);
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for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
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c = ARRAY_ITEM(&clients, i);
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if (c == NULL || c->session == NULL)
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continue;
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if ((c->flags & (CLIENT_SUSPENDED|CLIENT_DEAD)) != 0)
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continue;
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if (c->session->curw->window != wp->window)
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continue;
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if (BUFFER_USED(c->tty.out) > BACKOFF_THRESHOLD)
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return (1);
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}
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return (0);
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}
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/* Process a single window pane event. */
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void
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server_window_callback(int fd, short events, void *data)
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{
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struct window_pane *wp = data;
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if (wp->fd == -1)
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return;
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if (fd == wp->fd) {
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if (buffer_poll(fd, events, wp->in, wp->out) != 0) {
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close(wp->fd);
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wp->fd = -1;
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} else
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window_pane_parse(wp);
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}
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if (fd == wp->pipe_fd) {
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if (buffer_poll(fd, events, NULL, wp->pipe_buf) != 0) {
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buffer_destroy(wp->pipe_buf);
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close(wp->pipe_fd);
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wp->pipe_fd = -1;
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}
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}
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}
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/* Window functions that need to happen every loop. */
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void
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server_window_loop(void)
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{
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struct window *w;
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struct window_pane *wp;
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struct session *s;
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u_int i, j;
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for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
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w = ARRAY_ITEM(&windows, i);
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if (w == NULL)
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continue;
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for (j = 0; j < ARRAY_LENGTH(&sessions); j++) {
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s = ARRAY_ITEM(&sessions, j);
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if (s == NULL || !session_has(s, w))
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continue;
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if (server_window_check_bell(s, w) ||
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server_window_check_activity(s, w))
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server_status_session(s);
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TAILQ_FOREACH(wp, &w->panes, entry)
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server_window_check_content(s, w, wp);
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}
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w->flags &= ~(WINDOW_BELL|WINDOW_ACTIVITY|WINDOW_CONTENT);
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server_window_check_alive(w);
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}
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set_window_names();
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}
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/* Check for bell in window. */
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int
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server_window_check_bell(struct session *s, struct window *w)
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{
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struct client *c;
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u_int i;
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int action, visual;
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if (!(w->flags & WINDOW_BELL))
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return (0);
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if (session_alert_has_window(s, w, WINDOW_BELL))
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return (0);
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session_alert_add(s, w, WINDOW_BELL);
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action = options_get_number(&s->options, "bell-action");
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switch (action) {
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case BELL_ANY:
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if (s->flags & SESSION_UNATTACHED)
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break;
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visual = options_get_number(&s->options, "visual-bell");
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for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
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c = ARRAY_ITEM(&clients, i);
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if (c == NULL || c->session != s)
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continue;
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if (!visual) {
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tty_putcode(&c->tty, TTYC_BEL);
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continue;
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}
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if (c->session->curw->window == w) {
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status_message_set(c, "Bell in current window");
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continue;
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}
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status_message_set(c, "Bell in window %u",
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winlink_find_by_window(&s->windows, w)->idx);
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}
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break;
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case BELL_CURRENT:
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if (s->flags & SESSION_UNATTACHED)
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break;
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visual = options_get_number(&s->options, "visual-bell");
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for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
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c = ARRAY_ITEM(&clients, i);
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if (c == NULL || c->session != s)
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continue;
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if (c->session->curw->window != w)
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continue;
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if (!visual) {
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tty_putcode(&c->tty, TTYC_BEL);
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continue;
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}
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status_message_set(c, "Bell in current window");
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}
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break;
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}
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return (1);
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}
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/* Check for activity in window. */
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int
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server_window_check_activity(struct session *s, struct window *w)
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{
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struct client *c;
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u_int i;
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if (!(w->flags & WINDOW_ACTIVITY))
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return (0);
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if (s->curw->window == w)
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return (0);
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if (!options_get_number(&w->options, "monitor-activity"))
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return (0);
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if (session_alert_has_window(s, w, WINDOW_ACTIVITY))
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return (0);
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session_alert_add(s, w, WINDOW_ACTIVITY);
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if (s->flags & SESSION_UNATTACHED)
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return (0);
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if (options_get_number(&s->options, "visual-activity")) {
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for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
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c = ARRAY_ITEM(&clients, i);
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if (c == NULL || c->session != s)
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continue;
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status_message_set(c, "Activity in window %u",
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winlink_find_by_window(&s->windows, w)->idx);
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}
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}
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return (1);
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}
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/* Check for content change in window. */
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int
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server_window_check_content(
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struct session *s, struct window *w, struct window_pane *wp)
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{
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struct client *c;
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u_int i;
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char *found, *ptr;
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if (!(w->flags & WINDOW_ACTIVITY)) /* activity for new content */
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return (0);
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if (s->curw->window == w)
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return (0);
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ptr = options_get_string(&w->options, "monitor-content");
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if (ptr == NULL || *ptr == '\0')
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return (0);
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if (session_alert_has_window(s, w, WINDOW_CONTENT))
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return (0);
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if ((found = window_pane_search(wp, ptr, NULL)) == NULL)
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return (0);
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xfree(found);
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session_alert_add(s, w, WINDOW_CONTENT);
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if (s->flags & SESSION_UNATTACHED)
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return (0);
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if (options_get_number(&s->options, "visual-content")) {
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for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
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c = ARRAY_ITEM(&clients, i);
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if (c == NULL || c->session != s)
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continue;
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status_message_set(c, "Content in window %u",
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winlink_find_by_window(&s->windows, w)->idx);
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}
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}
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return (1);
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}
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/* Check if window still exists. */
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void
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server_window_check_alive(struct window *w)
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{
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struct window_pane *wp, *wq;
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struct options *oo = &w->options;
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struct session *s;
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struct winlink *wl;
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u_int i;
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int destroyed;
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destroyed = 1;
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wp = TAILQ_FIRST(&w->panes);
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while (wp != NULL) {
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wq = TAILQ_NEXT(wp, entry);
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/*
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* If the pane has died and the remain-on-exit flag is not set,
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* remove the pane; otherwise, if the flag is set, don't allow
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* the window to be destroyed (or it'll close when the last
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* pane dies).
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*/
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if (wp->fd == -1 && !options_get_number(oo, "remain-on-exit")) {
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layout_close_pane(wp);
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window_remove_pane(w, wp);
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server_redraw_window(w);
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} else
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destroyed = 0;
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wp = wq;
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}
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if (!destroyed)
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return;
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for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
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s = ARRAY_ITEM(&sessions, i);
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if (s == NULL)
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continue;
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if (!session_has(s, w))
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continue;
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restart:
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/* Detach window and either redraw or kill clients. */
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RB_FOREACH(wl, winlinks, &s->windows) {
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if (wl->window != w)
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continue;
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if (session_detach(s, wl)) {
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server_destroy_session_group(s);
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break;
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}
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server_redraw_session(s);
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server_status_session_group(s);
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goto restart;
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}
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}
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recalculate_sizes();
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}
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