/* $OpenBSD$ */
/*
* 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 <sys/ioctl.h>
#include <errno.h>
#include <fcntl.h>
#include <fnmatch.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>
#include <util.h>
#include "tmux.h"
/*
* Each window is attached to a number of panes, each of which is a pty. This
* file contains code to handle them.
*
* A pane has two buffers attached, these are filled and emptied by the main
* server poll loop. Output data is received from pty's in screen format,
* translated and returned as a series of escape sequences and strings via
* input_parse (in input.c). Input data is received as key codes and written
* directly via input_key.
*
* Each pane also has a "virtual" screen (screen.c) which contains the current
* state and is redisplayed when the window is reattached to a client.
*
* Windows are stored directly on a global array and wrapped in any number of
* winlink structs to be linked onto local session RB trees. A reference count
* is maintained and a window removed from the global list and destroyed when
* it reaches zero.
*/
/* Global window list. */
struct windows windows;
/* Global panes tree. */
struct window_pane_tree all_window_panes;
static u_int next_window_pane_id;
static u_int next_window_id;
static u_int next_active_point;
static struct window_pane *window_pane_create(struct window *, u_int, u_int,
u_int);
static void window_pane_destroy(struct window_pane *);
static void window_pane_set_watermark(struct window_pane *, size_t);
static void