/src/tmux/tmux.h

Source
/* $OpenBSD: tmux.h,v 1.1431 2026/08/25 08:37:08 nicm Exp $ */

/*
 * 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.
 */

#ifndef TMUX_H
#define TMUX_H

#include <sys/time.h>
#include <sys/uio.h>

#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <termios.h>
#include <wchar.h>

#ifdef HAVE_UTEMPTER
#include <utempter.h>
#endif

#include "compat.h"
#include "tmux-protocol.h"
#include "xmalloc.h"

extern char   **environ;

struct args;
struct args_command_state;
struct client;
struct cmd;
struct cmd_find_state;
struct cmdq_item;
struct cmdq_list;
struct cmdq_state;
struct cmds;
struct control_state;
struct environ;
struct event_payload;
struct event_payload_item;
struct events_sink;
struct format_job_tree;
struct format_tree;
struct hyperlinks_uri;
struct hyperlinks;
struct input_ctx;
struct input_request;
struct input_requests;
struct job;
struct menu_data;
struct mode_tree_data;
struct mouse_event;
struct options;
struct options_array_item;
struct options_entry;
struct prompt;
struct window_pane_prompt;
struct redraw_scene;
struct redraw_span;
struct screen_write_citem;
struct screen_write_cline;
struct screen_write_ctx;
struct session;

#ifdef ENABLE_SIXEL
struct sixel_image;
#endif

struct tty_ctx;
struct tty_code;
struct tty_key;
struct tmuxpeer;
struct tmuxproc;
struct winlink;

/* Default configuration files and socket paths. */
#ifndef TMUX_CONF
#define TMUX_CONF "/etc/tmux.conf:~/.tmux.conf"
#endif
#ifndef TMUX_SOCK
#define TMUX_SOCK "$TMUX_TMPDIR:" _PATH_TMP
#endif
#ifndef TMUX_SOCK_PERM
#define TMUX_SOCK_PERM (7 /* o+rwx */)
#endif
#ifndef TMUX_TERM
#define TMUX_TERM "screen"
#endif
#ifndef TMUX_LOCK_CMD
#define TMUX_LOCK_CMD "lock -np"
#endif
#ifndef TMUX_MOUSE
#define TMUX_MOUSE 0
#endif

/* Minimum and maximum layout cell size, NOT including border lines. */
#define PANE_MINIMUM 1
#define PANE_MAXIMUM 10000

/* Minimum and maximum window size. */
#define WINDOW_MINIMUM PANE_MINIMUM
#define WINDOW_MAXIMUM 10000

/* Automatic name refresh interval, in microseconds. Must be < 1 second. */
#define NAME_INTERVAL 500000

/* Default pixel cell sizes. */
#define DEFAULT_XPIXEL 16
#define DEFAULT_YPIXEL 32

/* Attribute to make GCC check printf-like arguments. */
#define printflike(a, b) __attribute__ ((format (printf, a, b)))

/* Number of items in array. */
#ifndef nitems
#define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
#endif

/* Alert option values. */
#define ALERT_NONE 0
#define ALERT_ANY 1
#define ALERT_CURRENT 2
#define ALERT_OTHER 3

/* Visual option values. */
#define VISUAL_OFF 0
#define VISUAL_ON 1
#define VISUAL_BOTH 2

/* Key modifier bits. */
#define KEYC_META            0x00100000000000ULL
#define KEYC_CTRL            0x00200000000000ULL
#define KEYC_SHIFT           0x00400000000000ULL

/* Key flag bits. */
#define KEYC_LITERAL       0x01000000000000ULL
#define KEYC_KEYPAD      0x02000000000000ULL
#define KEYC_CURSOR      0x04000000000000ULL
#define KEYC_IMPLIED_META    0x08000000000000ULL
#define KEYC_BUILD_MODIFIERS 0x10000000000000ULL
#define KEYC_VI        0x20000000000000ULL
#define KEYC_SENT      0x40000000000000ULL

/* Masks for key bits. */
#define KEYC_MASK_TYPE       0x0000ff00000000ULL
#define KEYC_MASK_MODIFIERS  0x00ff0000000000ULL
#define KEYC_MASK_FLAGS      0xff000000000000ULL
#define KEYC_MASK_KEY        0x0000ffffffffffULL

#define KEYC_NUSER           1000
#define KEYC_SHIFT_TYPE(t)   ((unsigned long long)(t) << 32)
#define KEYC_IS_TYPE(k, t)   (((k) & KEYC_MASK_TYPE) == KEYC_SHIFT_TYPE(t))
enum key_code_type {
  KEYC_TYPE_UNICODE,
  KEYC_TYPE_USER,
  KEYC_TYPE_FUNCTION,
  KEYC_TYPE_MOUSEMOVE,
  KEYC_TYPE_MOUSEDOWN,
  KEYC_TYPE_MOUSEUP,
  KEYC_TYPE_MOUSEDRAG,
  KEYC_TYPE_MOUSEDRAGEND,
  KEYC_TYPE_WHEELDOWN,
  KEYC_TYPE_WHEELUP,
  KEYC_TYPE_SECONDCLICK,
  KEYC_TYPE_DOUBLECLICK,
  KEYC_TYPE_TRIPLECLICK,
  KEYC_TYPE_NOTYPE /* end */
};

enum key_code_mouse_location {
  KEYC_MOUSE_LOCATION_PANE,
  KEYC_MOUSE_LOCATION_STATUS,
  KEYC_MOUSE_LOCATION_STATUS_LEFT,
  KEYC_MOUSE_LOCATION_STATUS_RIGHT,
  KEYC_MOUSE_LOCATION_STATUS_DEFAULT,
  KEYC_MOUSE_LOCATION_BORDER,
  KEYC_MOUSE_LOCATION_SCROLLBAR_UP,
  KEYC_MOUSE_LOCATION_SCROLLBAR_SLIDER,
  KEYC_MOUSE_LOCATION_SCROLLBAR_DOWN,
  KEYC_MOUSE_LOCATION_EMPTY,
  KEYC_MOUSE_LOCATION_CONTROL0, /* keep order */
  KEYC_MOUSE_LOCATION_CONTROL1,
  KEYC_MOUSE_LOCATION_CONTROL2,
  KEYC_MOUSE_LOCATION_CONTROL3,
  KEYC_MOUSE_LOCATION_CONTROL4,
  KEYC_MOUSE_LOCATION_CONTROL5,
  KEYC_MOUSE_LOCATION_CONTROL6,
  KEYC_MOUSE_LOCATION_CONTROL7,
  KEYC_MOUSE_LOCATION_CONTROL8,
  KEYC_MOUSE_LOCATION_CONTROL9,
  KEYC_MOUSE_LOCATION_NOWHERE /* end */
};

/* Is this a Unicode key? */
#define KEYC_IS_UNICODE(key) \
  (((key) & KEYC_MASK_TYPE) == KEYC_SHIFT_TYPE(KEYC_TYPE_UNICODE) && \
   ((key) & KEYC_MASK_KEY) > 0x7f)

/* Is this a user key? */
#define KEYC_IS_USER(key) \
  (((key) & KEYC_MASK_TYPE) == KEYC_SHIFT_TYPE(KEYC_TYPE_USER))

/* Is this a function key? */
#define KEYC_IS_SPECIAL(key) \
  (((key) & KEYC_MASK_TYPE) == KEYC_SHIFT_TYPE(KEYC_TYPE_FUNCTION))

/* Is this a mouse key? */
#define KEYC_IS_MOUSE(key) \
  (((key) & KEYC_MASK_KEY) == KEYC_MOUSE || \
   (((key) & KEYC_MASK_TYPE) >= KEYC_SHIFT_TYPE(KEYC_TYPE_MOUSEMOVE) && \
    ((key) & KEYC_MASK_TYPE) <= KEYC_SHIFT_TYPE(KEYC_TYPE_TRIPLECLICK)))

/* Is this a paste key? */
#define KEYC_IS_PASTE(key) \
  (((key) & KEYC_MASK_TYPE) == KEYC_SHIFT_TYPE(KEYC_TYPE_FUNCTION) && \
   (((key) & KEYC_MASK_KEY) == KEYC_PASTE_START || \
   ((key) & KEYC_MASK_KEY) == KEYC_PASTE_END))

/* Multiple click timeout. */
#define KEYC_CLICK_TIMEOUT 300

/* Bit shift for mouse events. */
#define KEYC_MOUSE_LOCATION_SHIFT  0
#define KEYC_MOUSE_BUTTON_SHIFT 8

/* Mouse key codes. */
#define KEYC_MOUSE_KEYS(t)                                             \
  KEYC_MOUSE_KEY(KEYC_ ## t, KEYC_TYPE_ ## t, PANE),             \
  KEYC_MOUSE_KEY(KEYC_ ## t, KEYC_TYPE_ ## t, STATUS),           \
  KEYC_MOUSE_KEY(KEYC_ ## t, KEYC_TYPE_ ## t, STATUS_LEFT),      \
  KEYC_MOUSE_KEY(KEYC_ ## t, KEYC_TYPE_ ## t, STATUS_RIGHT),     \
  KEYC_MOUSE_KEY(KEYC_ ## t, KEYC_TYPE_ ## t, STATUS_DEFAULT),   \
  KEYC_MOUSE_KEY(KEYC_ ## t, KEYC_TYPE_ ## t, BORDER),           \
  KEYC_MOUSE_KEY(KEYC_ ## t, KEYC_TYPE_ ## t, SCROLLBAR_UP),     \
  KEYC_MOUSE_KEY(KEYC_ ## t, KEYC_TYPE_ ## t, SCROLLBAR_SLIDER), \
  KEYC_MOUSE_KEY(KEYC_ ## t, KEYC_TYPE_ ## t, SCROLLBAR_DOWN),   \
  KEYC_MOUSE_KEY(KEYC_ ## t, KEYC_TYPE_ ## t, EMPTY),            \
  KEYC_MOUSE_KEY(KEYC_ ## t, KEYC_TYPE_ ## t, CONTROL0),         \
  KEYC_MOUSE_KEY(KEYC_ ## t, KEYC_TYPE_ ## t, CONTROL1),         \
  KEYC_MOUSE_KEY(KEYC_ ## t, KEYC_TYPE_ ## t, CONTROL2),         \
  KEYC_MOUSE_KEY(KEYC_ ## t, KEYC_TYPE_ ## t, CONTROL3),         \
  KEYC_MOUSE_KEY(KEYC_ ## t, KEYC_TYPE_ ## t, CONTROL4),         \
  KEYC_MOUSE_KEY(KEYC_ ## t, KEYC_TYPE_ ## t, CONTROL5),         \
  KEYC_MOUSE_KEY(KEYC_ ## t, KEYC_TYPE_ ## t, CONTROL6),         \
  KEYC_MOUSE_KEY(KEYC_ ## t, KEYC_TYPE_ ## t, CONTROL7),         \
  KEYC_MOUSE_KEY(KEYC_ ## t, KEYC_TYPE_ ## t, CONTROL8),         \
  KEYC_MOUSE_KEY(KEYC_ ## t, KEYC_TYPE_ ## t, CONTROL9)
#define KEYC_MOUSE_KEY(p, t, l)                                                \
  p ## _ ## l = KEYC_MAKE_MOUSE_KEY(t, 0, KEYC_MOUSE_LOCATION_ ## l),    \
  p ## 1_ ## l = KEYC_MAKE_MOUSE_KEY(t, 1, KEYC_MOUSE_LOCATION_ ## l),   \
  p ## 2_ ## l = KEYC_MAKE_MOUSE_KEY(t, 2, KEYC_MOUSE_LOCATION_ ## l),   \
  p ## 3_ ## l = KEYC_MAKE_MOUSE_KEY(t, 3, KEYC_MOUSE_LOCATION_ ## l),   \
  p ## 6_ ## l = KEYC_MAKE_MOUSE_KEY(t, 6, KEYC_MOUSE_LOCATION_ ## l),   \
  p ## 7_ ## l = KEYC_MAKE_MOUSE_KEY(t, 7, KEYC_MOUSE_LOCATION_ ## l),   \
  p ## 8_ ## l = KEYC_MAKE_MOUSE_KEY(t, 8, KEYC_MOUSE_LOCATION_ ## l),   \
  p ## 9_ ## l = KEYC_MAKE_MOUSE_KEY(t, 9, KEYC_MOUSE_LOCATION_ ## l),   \
  p ## 10_ ## l = KEYC_MAKE_MOUSE_KEY(t, 10, KEYC_MOUSE_LOCATION_ ## l), \
  p ## 11_ ## l = KEYC_MAKE_MOUSE_KEY(t, 11, KEYC_MOUSE_LOCATION_ ## l)
#define KEYC_MAKE_MOUSE_KEY(t, b, l)                            \
  ((KEYC_SHIFT_TYPE(t)) |                                 \
   ((unsigned long long)(b) << KEYC_MOUSE_BUTTON_SHIFT) | \
         ((unsigned long long)(l) << KEYC_MOUSE_LOCATION_SHIFT))
#define KEYC_MOUSE_STRING(name, s)              \
  { #s "Pane", KEYC_ ## name ## _PANE },            \
  { #s "Status", KEYC_ ## name ## _STATUS },          \
  { #s "StatusLeft", KEYC_ ## name ## _STATUS_LEFT },       \
  { #s "StatusRight", KEYC_ ## name ## _STATUS_RIGHT },       \
  { #s "StatusDefault", KEYC_ ## name ## _STATUS_DEFAULT },     \
  { #s "ScrollbarUp", KEYC_ ## name ## _SCROLLBAR_UP },         \
  { #s "ScrollbarSlider", KEYC_ ## name ## _SCROLLBAR_SLIDER }, \
  { #s "ScrollbarDown", KEYC_ ## name ## _SCROLLBAR_DOWN },     \
  { #s "Empty", KEYC_ ## name ## _EMPTY },          \
  { #s "Border", KEYC_ ## name ## _BORDER },          \
  { #s "Control0", KEYC_ ## name ## _CONTROL0 },          \
  { #s "Control1", KEYC_ ## name ## _CONTROL1 },          \
  { #s "Control2", KEYC_ ## name ## _CONTROL2 },          \
  { #s "Control3", KEYC_ ## name ## _CONTROL3 },          \
  { #s "Control4", KEYC_ ## name ## _CONTROL4 },          \
  { #s "Control5", KEYC_ ## name ## _CONTROL5 },          \
  { #s "Control6", KEYC_ ## name ## _CONTROL6 },          \
  { #s "Control7", KEYC_ ## name ## _CONTROL7 },          \
  { #s "Control8", KEYC_ ## name ## _CONTROL8 },          \
  { #s "Control9", KEYC_ ## name ## _CONTROL9 }

/*
 * A single key. This can be ASCII or Unicode or one of the keys between
 * KEYC_BASE and KEYC_BASE_END.
 */
typedef unsigned long long key_code;

/* C0 control characters */
enum {
  C0_NUL,
  C0_SOH,
  C0_STX,
  C0_ETX,
  C0_EOT,
  C0_ENQ,
  C0_ASC,
  C0_BEL,
  C0_BS,
  C0_HT,
  C0_LF,
  C0_VT,
  C0_FF,
  C0_CR,
  C0_SO,
  C0_SI,
  C0_DLE,
  C0_DC1,
  C0_DC2,
  C0_DC3,
  C0_DC4,
  C0_NAK,
  C0_SYN,
  C0_ETB,
  C0_CAN,
  C0_EM,
  C0_SUB,
  C0_ESC,
  C0_FS,
  C0_GS,
  C0_RS,
  C0_US
};

/* Special key codes. */
enum {
  /* User key code range. */
  KEYC_USER = KEYC_SHIFT_TYPE(KEYC_TYPE_USER),

  /* Functional key code range. */
  KEYC_NONE = KEYC_SHIFT_TYPE(KEYC_TYPE_FUNCTION),
  KEYC_UNKNOWN,

  /* Focus events. */
  KEYC_FOCUS_IN,
  KEYC_FOCUS_OUT,

  /* "Any" key, used if not found in key table. */
  KEYC_ANY,

  /* Paste brackets. */
  KEYC_PASTE_START,
  KEYC_PASTE_END,

  /* Backspace key. */
  KEYC_BSPACE,

  /* Function keys. */
  KEYC_F1,
  KEYC_F2,
  KEYC_F3,
  KEYC_F4,
  KEYC_F5,
  KEYC_F6,
  KEYC_F7,
  KEYC_F8,
  KEYC_F9,
  KEYC_F10,
  KEYC_F11,
  KEYC_F12,
  KEYC_IC,
  KEYC_DC,
  KEYC_HOME,
  KEYC_END,
  KEYC_NPAGE,
  KEYC_PPAGE,
  KEYC_BTAB,

  /* Arrow keys. */
  KEYC_UP,
  KEYC_DOWN,
  KEYC_LEFT,
  KEYC_RIGHT,

  /* Numeric keypad. */
  KEYC_KP_SLASH,
  KEYC_KP_STAR,
  KEYC_KP_MINUS,
  KEYC_KP_SEVEN,
  KEYC_KP_EIGHT,
  KEYC_KP_NINE,
  KEYC_KP_PLUS,
  KEYC_KP_FOUR,
  KEYC_KP_FIVE,
  KEYC_KP_SIX,
  KEYC_KP_ONE,
  KEYC_KP_TWO,
  KEYC_KP_THREE,
  KEYC_KP_ENTER,
  KEYC_KP_ZERO,
  KEYC_KP_PERIOD,

  /* Theme reporting. */
  KEYC_REPORT_DARK_THEME,
  KEYC_REPORT_LIGHT_THEME,

  /* Mouse state. */
  KEYC_MOUSE, /* unclassified mouse event */
  KEYC_DRAGGING, /* dragging in progress */
  KEYC_DOUBLECLICK, /* double click complete */

  /* Mouse key code ranges. Must be at the end. */
  KEYC_MOUSE_KEYS(MOUSEMOVE),
  KEYC_MOUSE_KEYS(WHEELDOWN),
  KEYC_MOUSE_KEYS(WHEELUP),
  KEYC_MOUSE_KEYS(MOUSEDOWN),
  KEYC_MOUSE_KEYS(MOUSEUP),
  KEYC_MOUSE_KEYS(MOUSEDRAG),
  KEYC_MOUSE_KEYS(MOUSEDRAGEND),
  KEYC_MOUSE_KEYS(SECONDCLICK),
  KEYC_MOUSE_KEYS(DOUBLECLICK),
  KEYC_MOUSE_KEYS(TRIPLECLICK),
};

/* Termcap codes. */
enum tty_code_code {
  TTYC_ACSC,
  TTYC_AM,
  TTYC_AX,
  TTYC_BCE,
  TTYC_BEL,
  TTYC_BIDI,
  TTYC_BLINK,
  TTYC_BOLD,
  TTYC_CIVIS,
  TTYC_CLEAR,
  TTYC_CLMG,
  TTYC_CMG,
  TTYC_CNORM,
  TTYC_COLORS,
  TTYC_CR,
  TTYC_CS,
  TTYC_CSR,
  TTYC_CUB,
  TTYC_CUB1,
  TTYC_CUD,
  TTYC_CUD1,
  TTYC_CUF,
  TTYC_CUF1,
  TTYC_CUP,
  TTYC_CUU,
  TTYC_CUU1,
  TTYC_CVVIS,
  TTYC_DCH,
  TTYC_DCH1,
  TTYC_DIM,
  TTYC_DL,
  TTYC_DL1,
  TTYC_DSBP,
  TTYC_DSEKS,
  TTYC_DSFCS,
  TTYC_DSMG,
  TTYC_E3,
  TTYC_ECH,
  TTYC_ED,
  TTYC_EL,
  TTYC_EL1,
  TTYC_ENACS,
  TTYC_ENBP,
  TTYC_ENEKS,
  TTYC_ENFCS,
  TTYC_ENMG,
  TTYC_FSL,
  TTYC_HLS,
  TTYC_HOME,
  TTYC_HPA,
  TTYC_ICH,
  TTYC_ICH1,
  TTYC_IL,
  TTYC_IL1,
  TTYC_IND,
  TTYC_INDN,
  TTYC_INVIS,
  TTYC_KCBT,
  TTYC_KCUB1,
  TTYC_KCUD1,
  TTYC_KCUF1,
  TTYC_KCUU1,
  TTYC_KDC2,
  TTYC_KDC3,
  TTYC_KDC4,
  TTYC_KDC5,
  TTYC_KDC6,
  TTYC_KDC7,
  TTYC_KDCH1,
  TTYC_KDN2,
  TTYC_KDN3,
  TTYC_KDN4,
  TTYC_KDN5,
  TTYC_KDN6,
  TTYC_KDN7,
  TTYC_KEND,
  TTYC_KEND2,
  TTYC_KEND3,
  TTYC_KEND4,
  TTYC_KEND5,
  TTYC_KEND6,
  TTYC_KEND7,
  TTYC_KF1,
  TTYC_KF10,
  TTYC_KF11,
  TTYC_KF12,
  TTYC_KF13,
  TTYC_KF14,
  TTYC_KF15,
  TTYC_KF16,
  TTYC_KF17,
  TTYC_KF18,
  TTYC_KF19,
  TTYC_KF2,
  TTYC_KF20,
  TTYC_KF21,
  TTYC_KF22,
  TTYC_KF23,
  TTYC_KF24,
  TTYC_KF25,
  TTYC_KF26,
  TTYC_KF27,
  TTYC_KF28,
  TTYC_KF29,
  TTYC_KF3,
  TTYC_KF30,
  TTYC_KF31,
  TTYC_KF32,
  TTYC_KF33,
  TTYC_KF34,
  TTYC_KF35,
  TTYC_KF36,
  TTYC_KF37,
  TTYC_KF38,
  TTYC_KF39,
  TTYC_KF4,
  TTYC_KF40,
  TTYC_KF41,
  TTYC_KF42,
  TTYC_KF43,
  TTYC_KF44,
  TTYC_KF45,
  TTYC_KF46,
  TTYC_KF47,
  TTYC_KF48,
  TTYC_KF49,
  TTYC_KF5,
  TTYC_KF50,
  TTYC_KF51,
  TTYC_KF52,
  TTYC_KF53,
  TTYC_KF54,
  TTYC_KF55,
  TTYC_KF56,
  TTYC_KF57,
  TTYC_KF58,
  TTYC_KF59,
  TTYC_KF6,
  TTYC_KF60,
  TTYC_KF61,
  TTYC_KF62,
  TTYC_KF63,
  TTYC_KF7,
  TTYC_KF8,
  TTYC_KF9,
  TTYC_KHOM2,
  TTYC_KHOM3,
  TTYC_KHOM4,
  TTYC_KHOM5,
  TTYC_KHOM6,
  TTYC_KHOM7,
  TTYC_KHOME,
  TTYC_KIC2,
  TTYC_KIC3,
  TTYC_KIC4,
  TTYC_KIC5,
  TTYC_KIC6,
  TTYC_KIC7,
  TTYC_KICH1,
  TTYC_KIND,
  TTYC_KLFT2,
  TTYC_KLFT3,
  TTYC_KLFT4,
  TTYC_KLFT5,
  TTYC_KLFT6,
  TTYC_KLFT7,
  TTYC_KMOUS,
  TTYC_KNP,
  TTYC_KNXT2,
  TTYC_KNXT3,
  TTYC_KNXT4,
  TTYC_KNXT5,
  TTYC_KNXT6,
  TTYC_KNXT7,
  TTYC_KPP,
  TTYC_KPRV2,
  TTYC_KPRV3,
  TTYC_KPRV4,
  TTYC_KPRV5,
  TTYC_KPRV6,
  TTYC_KPRV7,
  TTYC_KRI,
  TTYC_KRIT2,
  TTYC_KRIT3,
  TTYC_KRIT4,
  TTYC_KRIT5,
  TTYC_KRIT6,
  TTYC_KRIT7,
  TTYC_KUP2,
  TTYC_KUP3,
  TTYC_KUP4,
  TTYC_KUP5,
  TTYC_KUP6,
  TTYC_KUP7,
  TTYC_MS,
  TTYC_NOBR,
  TTYC_OL,
  TTYC_OP,
  TTYC_RECT,
  TTYC_REV,
  TTYC_RGB,
  TTYC_RI,
  TTYC_RIN,
  TTYC_RMACS,
  TTYC_RMCUP,
  TTYC_RMKX,
  TTYC_SE,
  TTYC_SETAB,
  TTYC_SETAF,
  TTYC_SETAL,
  TTYC_SETRGBB,
  TTYC_SETRGBF,
  TTYC_SETULC,
  TTYC_SETULC1,
  TTYC_SGR0,
  TTYC_SITM,
  TTYC_SMACS,
  TTYC_SMCUP,
  TTYC_SMKX,
  TTYC_SMOL,
  TTYC_SMSO,
  TTYC_SMUL,
  TTYC_SMULX,
  TTYC_SMXX,
  TTYC_SPB,
  TTYC_SXL,
  TTYC_SS,
  TTYC_SWD,
  TTYC_SYNC,
  TTYC_TC,
  TTYC_TSL,
  TTYC_U8,
  TTYC_VPA,
  TTYC_XT
};

/* Character classes. */
#define WHITESPACE "\t "

/* Mode keys. */
#define MODEKEY_EMACS 0
#define MODEKEY_VI 1

/* Modes. */
#define MODE_CURSOR 0x1
#define MODE_INSERT 0x2
#define MODE_KCURSOR 0x4
#define MODE_KKEYPAD 0x8
#define MODE_WRAP 0x10
#define MODE_MOUSE_STANDARD 0x20
#define MODE_MOUSE_BUTTON 0x40
#define MODE_CURSOR_BLINKING 0x80
#define MODE_MOUSE_UTF8 0x100
#define MODE_MOUSE_SGR 0x200
#define MODE_BRACKETPASTE 0x400
#define MODE_FOCUSON 0x800
#define MODE_MOUSE_ALL 0x1000
#define MODE_ORIGIN 0x2000
#define MODE_CRLF 0x4000
#define MODE_KEYS_EXTENDED 0x8000
#define MODE_CURSOR_VERY_VISIBLE 0x10000
#define MODE_CURSOR_BLINKING_SET 0x20000
#define MODE_KEYS_EXTENDED_2 0x40000
#define MODE_THEME_UPDATES 0x80000
#define MODE_SYNC 0x100000

#define ALL_MODES 0xffffff
#define ALL_MOUSE_MODES (MODE_MOUSE_STANDARD|MODE_MOUSE_BUTTON|MODE_MOUSE_ALL)
#define MOTION_MOUSE_MODES (MODE_MOUSE_BUTTON|MODE_MOUSE_ALL)
#define CURSOR_MODES (MODE_CURSOR|MODE_CURSOR_BLINKING|MODE_CURSOR_VERY_VISIBLE)
#define EXTENDED_KEY_MODES (MODE_KEYS_EXTENDED|MODE_KEYS_EXTENDED_2)

/* Mouse protocol constants. */
#define MOUSE_PARAM_MAX 0xff
#define MOUSE_PARAM_UTF8_MAX 0x7ff
#define MOUSE_PARAM_BTN_OFF 0x20
#define MOUSE_PARAM_POS_OFF 0x21

/* A single UTF-8 character. */
typedef u_int utf8_char;

/*
 * An expanded UTF-8 character. UTF8_SIZE must be big enough to hold combining
 * characters as well. It can't be more than 32 bytes without changes to how
 * characters are stored.
 */
#define UTF8_SIZE 32
struct utf8_data {
  u_char  data[UTF8_SIZE];

  u_char  have;
  u_char  size;

  u_char  width;  /* 0xff if invalid */
};
enum utf8_state {
  UTF8_MORE,
  UTF8_DONE,
  UTF8_ERROR
};

/* State for processing of Korean characters. */
enum hanguljamo_state {
  HANGULJAMO_STATE_NOT_HANGULJAMO,
  HANGULJAMO_STATE_CHOSEONG,
  HANGULJAMO_STATE_COMPOSABLE,
  HANGULJAMO_STATE_NOT_COMPOSABLE
};

/* Colour flags. */
#define COLOUR_FLAG_256 0x01000000
#define COLOUR_FLAG_RGB 0x02000000
#define COLOUR_FLAG_THEME 0x04000000

/* Special colours. */
#define COLOUR_DEFAULT(c) ((c) == 8 || (c) == 9)

/* Theme colours. */
enum colour_theme {
  COLOUR_THEME_BLACK,
  COLOUR_THEME_WHITE,
  COLOUR_THEME_LIGHT_GREY,
  COLOUR_THEME_DARK_GREY,
  COLOUR_THEME_GREEN,
  COLOUR_THEME_YELLOW,
  COLOUR_THEME_RED,
  COLOUR_THEME_BLUE,
  COLOUR_THEME_CYAN,
  COLOUR_THEME_MAGENTA
};
#define COLOUR_THEME_COUNT 10

/* Replacement palette. */
struct colour_palette {
  int  fg;
  int  bg;

  int *palette;
  int *default_palette;
};

/* Grid attributes. Anything above 0xff is stored in an extended cell. */
#define GRID_ATTR_BRIGHT 0x1
#define GRID_ATTR_DIM 0x2
#define GRID_ATTR_UNDERSCORE 0x4
#define GRID_ATTR_BLINK 0x8
#define GRID_ATTR_REVERSE 0x10
#define GRID_ATTR_HIDDEN 0x20
#define GRID_ATTR_ITALICS 0x40
#define GRID_ATTR_CHARSET 0x80  /* alternative character set */
#define GRID_ATTR_STRIKETHROUGH 0x100
#define GRID_ATTR_UNDERSCORE_2 0x200
#define GRID_ATTR_UNDERSCORE_3 0x400
#define GRID_ATTR_UNDERSCORE_4 0x800
#define GRID_ATTR_UNDERSCORE_5 0x1000
#define GRID_ATTR_OVERLINE 0x2000
#define GRID_ATTR_NOATTR 0x4000

/* All underscore attributes. */
#define GRID_ATTR_ALL_UNDERSCORE \
  (GRID_ATTR_UNDERSCORE|  \
   GRID_ATTR_UNDERSCORE_2| \
   GRID_ATTR_UNDERSCORE_3| \
   GRID_ATTR_UNDERSCORE_4| \
   GRID_ATTR_UNDERSCORE_5)

/* Grid flags. */
#define GRID_FLAG_FG256 0x1
#define GRID_FLAG_BG256 0x2
#define GRID_FLAG_PADDING 0x4
#define GRID_FLAG_EXTENDED 0x8
#define GRID_FLAG_SELECTED 0x10
#define GRID_FLAG_NOPALETTE 0x20
#define GRID_FLAG_CLEARED 0x40
#define GRID_FLAG_TAB 0x80

/* Grid line flags. */
#define GRID_LINE_WRAPPED 0x1
#define GRID_LINE_EXTENDED 0x2
#define GRID_LINE_DEAD 0x4
#define GRID_LINE_START_PROMPT 0x8
#define GRID_LINE_SECOND_PROMPT 0x10
#define GRID_LINE_START_COMMAND 0x20
#define GRID_LINE_START_OUTPUT 0x40
#define GRID_LINE_END_OUTPUT 0x80
#define GRID_LINE_HYPERLINK 0x100

/* All OSC 133 flags. */
#define GRID_LINE_OSC133_FLAGS \
  (GRID_LINE_START_PROMPT| \
   GRID_LINE_SECOND_PROMPT| \
   GRID_LINE_START_COMMAND| \
   GRID_LINE_START_OUTPUT| \
   GRID_LINE_END_OUTPUT)

/* Grid string flags. */
#define GRID_STRING_WITH_SEQUENCES 0x1
#define GRID_STRING_ESCAPE_SEQUENCES 0x2
#define GRID_STRING_TRIM_SPACES 0x4
#define GRID_STRING_USED_ONLY 0x8
#define GRID_STRING_EMPTY_CELLS 0x10

/*
 * Cell border characters. Border cells are named for the directions they
 * connect to: U for up, D for down, L for left and R for right.
 */
#define CELL_INSIDE 0
#define CELL_UD 1
#define CELL_LR 2
#define CELL_RD 3
#define CELL_LD 4
#define CELL_RU 5
#define CELL_LU 6
#define CELL_LRD 7
#define CELL_LRU 8
#define CELL_URD 9
#define CELL_ULD 10
#define CELL_LRUD 11
#define CELL_NONE 12
#define CELL_SCROLLBAR 13

/* Cell borders. */
#define CELL_BORDERS " xqlkmjwvtun~"
#define SIMPLE_BORDERS " |-+++++++++."
#define PADDED_BORDERS "             "

/* Grid cell data. */
struct grid_cell {
  struct utf8_data  data;
  u_short     attr;
  u_char      flags;
  int     fg;
  int     bg;
  int     us;
  u_int     link;
};

/* Grid extended cell entry. */
struct grid_extd_entry {
  utf8_char   data;
  u_short     attr;
  u_char      flags;
  int     fg;
  int     bg;
  int     us;
  u_int     link;
} __packed;

/* Grid cell entry. */
struct grid_cell_entry {
  union {
    u_int   offset;
    struct {
      u_char  attr;
      u_char  fg;
      u_char  bg;
      u_char  data;
    } data;
  };
  u_char      flags;
} __packed;

/* OSC 133 data for a grid line. */
struct osc133_data {
  u_short      prompt_col;
  u_short      cmd_col;
  u_short      out_start_col;
  u_short      out_end_col;
  u_char       exit_status;
};

/* Grid line. */
struct grid_line {
  struct grid_cell_entry  *celldata;
  struct grid_extd_entry  *extddata;

  u_short      cellused;
  u_short      cellsize;
  u_int      extdsize;

  u_int      time;
  struct osc133_data   osc133_data;
  u_short      flags;
};

/* Entire grid of cells. */
struct grid {
  int      flags;
#define GRID_HISTORY 0x1 /* scroll lines into history */

  u_int      sx;
  u_int      sy;

  u_int      hscrolled;
  u_int      hsize;
  u_int      hlimit;

  u_int      scroll_added;
  u_int      scroll_collected;
  u_int      scroll_generation;

  struct grid_line  *linedata;
};

/* Virtual cursor in a grid. */
struct grid_reader {
  struct grid *gd;
  u_int    cx;
  u_int    cy;
};

/* Style alignment. */
enum style_align {
  STYLE_ALIGN_DEFAULT,
  STYLE_ALIGN_LEFT,
  STYLE_ALIGN_CENTRE,
  STYLE_ALIGN_RIGHT,
  STYLE_ALIGN_ABSOLUTE_CENTRE
};

/* Style list. */
enum style_list {
  STYLE_LIST_OFF,
  STYLE_LIST_ON,
  STYLE_LIST_FOCUS,
  STYLE_LIST_LEFT_MARKER,
  STYLE_LIST_RIGHT_MARKER,
};

/* Style range. */
enum style_range_type {
  STYLE_RANGE_NONE,
  STYLE_RANGE_LEFT,
  STYLE_RANGE_RIGHT,
  STYLE_RANGE_PANE,
  STYLE_RANGE_WINDOW,
  STYLE_RANGE_SESSION,
  STYLE_RANGE_USER,
  STYLE_RANGE_CONTROL
};
struct style_range {
  enum style_range_type  type;
  u_int      argument;
  char       string[16];

  u_int      start;
  u_int      end; /* not included */

  TAILQ_ENTRY(style_range) entry;
};
TAILQ_HEAD(style_ranges, style_range);

/* Ranges connected with a status line. */
struct style_line_entry {
  char      *expanded;
  struct style_ranges  ranges;
};

/* Default style width and pad. */
#define STYLE_WIDTH_DEFAULT -1
#define STYLE_PAD_DEFAULT -1

/* Style default. */
enum style_default_type {
  STYLE_DEFAULT_BASE,
  STYLE_DEFAULT_PUSH,
  STYLE_DEFAULT_POP,
  STYLE_DEFAULT_SET
};

/* Style option. */
struct style {
  struct grid_cell  gc;
  int     ignore;
  int     dim;

  int     fill;
  enum style_align  align;
  enum style_list   list;

  enum style_range_type range_type;
  u_int     range_argument;
  char      range_string[16];

  int     width;
  int     width_percentage;
  int     pad;

  enum style_default_type default_type;

  u_int     link;
};

#ifdef ENABLE_SIXEL
/* Image. */
struct image {
  struct screen   *s;
  struct sixel_image  *data;
  char      *fallback;

  u_int      px;
  u_int      py;
  u_int      sx;
  u_int      sy;

  struct images   *list;
  TAILQ_ENTRY (image)  entry;

  TAILQ_ENTRY (image)  all_entry;
};
TAILQ_HEAD(images, image);
#endif

/* Cursor style. */
enum screen_cursor_style {
  SCREEN_CURSOR_DEFAULT,
  SCREEN_CURSOR_BLOCK,
  SCREEN_CURSOR_UNDERLINE,
  SCREEN_CURSOR_BAR
};


/* Progress bar, OSC 9;4. */
enum progress_bar_state {
  PROGRESS_BAR_HIDDEN = 0,
  PROGRESS_BAR_NORMAL = 1,
  PROGRESS_BAR_ERROR = 2,
  PROGRESS_BAR_INDETERMINATE = 3,
  PROGRESS_BAR_PAUSED = 4
};
struct progress_bar {
  enum progress_bar_state state;
  int     progress;
};

/* Virtual screen. */
struct screen_sel;
struct screen_titles;
struct screen {
  char        *title;
  char        *path;
  struct screen_titles    *titles;
  u_int        ntitles;

  struct grid     *grid;    /* grid data */

  u_int        cx;    /* cursor x */
  u_int        cy;    /* cursor y */

  enum screen_cursor_style   cstyle;  /* cursor style */
  enum screen_cursor_style   default_cstyle;
  int        ccolour; /* cursor colour */
  int        default_ccolour;

  u_int        rupper;  /* scroll region top */
  u_int        rlower;  /* scroll region bottom */

  int        mode;
  int        default_mode;

  u_int        saved_cx;
  u_int        saved_cy;
  struct grid     *saved_grid;
  struct grid_cell     saved_cell;
  int        saved_flags;

  bitstr_t      *tabs;
  struct screen_sel   *sel;

#ifdef ENABLE_SIXEL
  struct images      images;
  struct images      saved_images;
#endif

  struct screen_write_cline *write_list;

  struct hyperlinks   *hyperlinks;
  struct progress_bar    progress_bar;
};

/* Screen write context. */
typedef void (*screen_write_init_ctx_cb)(struct screen_write_ctx *,
    struct tty_ctx *);
struct screen_write_ctx {
  struct window_pane    *wp;
  struct screen     *s;

  int        flags;
#define SCREEN_WRITE_SYNC 0x1
#define SCREEN_WRITE_OBSCURED 0x2
#define SCREEN_WRITE_CHECKED_IF_OBSCURED 0x4

  screen_write_init_ctx_cb   init_ctx_cb;
  void        *arg;

  struct screen_write_citem *item;
  u_int        scrolled;
  u_int        bg;
};

/* Box border lines option. */
enum box_lines {
  BOX_LINES_DEFAULT = -1,
  BOX_LINES_SINGLE,
  BOX_LINES_DOUBLE,
  BOX_LINES_HEAVY,
  BOX_LINES_SIMPLE,
  BOX_LINES_ROUNDED,
  BOX_LINES_PADDED,
  BOX_LINES_NONE
};

/* Pane border lines option. */
enum pane_lines {
  PANE_LINES_SINGLE,
  PANE_LINES_DOUBLE,
  PANE_LINES_HEAVY,
  PANE_LINES_SIMPLE,
  PANE_LINES_NUMBER,
  PANE_LINES_SPACES,
  PANE_LINES_NONE
};

/* Pane border indicator option. */
#define PANE_BORDER_OFF 0
#define PANE_BORDER_COLOUR 1
#define PANE_BORDER_ARROWS 2
#define PANE_BORDER_BOTH 3

/* Mode returned by window_pane_mode function. */
#define WINDOW_PANE_NO_MODE 0
#define WINDOW_PANE_COPY_MODE 1
#define WINDOW_PANE_VIEW_MODE 2

/* Screen size. */
#define screen_size_x(s) ((s)->grid->sx)
#define screen_size_y(s) ((s)->grid->sy)
#define screen_hsize(s) ((s)->grid->hsize)
#define screen_hlimit(s) ((s)->grid->hlimit)

/* Menu. */
struct menu_item {
  const char  *name;
  key_code   key;
  const char  *command;
};
struct menu {
  const char    *title;
  struct menu_item  *items;
  u_int      count;
  u_int      width;
};
typedef void (*menu_choice_cb)(struct menu *, u_int, key_code, void *);

/*
 * Window mode. Windows can be in several modes and this is used to call the
 * right function to handle input and output.
 */
struct window_mode_entry;
struct window_mode {
  const char  *name;
  const char  *default_format;

  int    flags;
#define WINDOW_MODE_HIDE_PANE_STATUS 0x1
#define WINDOW_MODE_NO_STACK 0x2
#define WINDOW_MODE_FILL_WINDOW 0x4
#define WINDOW_MODE_HIDE_SCROLLBARS 0x8

  struct screen *(*init)(struct window_mode_entry *,
           struct cmdq_item *, struct cmd_find_state *,
           struct args *);
  void     (*free)(struct window_mode_entry *);
  void     (*resize)(struct window_mode_entry *, u_int, u_int);
  void     (*update)(struct window_mode_entry *);
  void     (*style_changed)(struct window_mode_entry *);
  void     (*key)(struct window_mode_entry *, struct client *,
           struct session *, struct winlink *, key_code,
           struct mouse_event *);

  const char  *(*key_table)(struct window_mode_entry *);
  void     (*command)(struct window_mode_entry *, struct client *,
           struct session *, struct winlink *, struct args *,
           struct mouse_event *);
  void     (*formats)(struct window_mode_entry *,
           struct format_tree *);
  struct screen *(*get_screen)(struct window_mode_entry *);
};

/* Active window mode. */
struct window_mode_entry {
  struct window_pane    *wp;
  struct window_pane    *swp;

  const struct window_mode  *mode;
  void        *data;

  struct screen     *screen;
  u_int        prefix;

  int        kill;

  TAILQ_ENTRY(window_mode_entry)   entry;
};

/* Type of request to client. */
enum input_request_type {
  INPUT_REQUEST_PALETTE,
  INPUT_REQUEST_CLIPBOARD,
  INPUT_REQUEST_QUEUE
};

/* Palette request reply data. */
struct input_request_palette_data {
  int idx;
  int c;
};

/* Clipboard request reply data. */
struct input_request_clipboard_data {
  char  *buf;
  size_t   len;
  char   clip;
};

/* Request sent to client on behalf of pane. */
TAILQ_HEAD(input_requests, input_request);

/* Offsets into pane buffer. */
struct window_pane_offset {
  size_t  used;
};

/* Queued pane resize. */
struct window_pane_resize {
  u_int       sx;
  u_int       sy;

  u_int       osx;
  u_int       osy;

  TAILQ_ENTRY(window_pane_resize) entry;
};
TAILQ_HEAD(window_pane_resizes, window_pane_resize);

/*
 * Client theme, this is worked out from the background colour if not reported
 * by terminal.
 */
enum client_theme {
  THEME_UNKNOWN,
  THEME_LIGHT,
  THEME_DARK
};

/* Visible range array element. */
struct visible_range {
  u_int px; /* start */
  u_int nx; /* length */
};

/* Visible areas not obstructed. */
struct visible_ranges {
  struct visible_range  *ranges;  /* dynamically allocated array */
  u_int      used;    /* number of entries in ranges */
  u_int      size;    /* allocated capacity of ranges */
};

/* Child window structure. */
struct window_pane {
  u_int    id;
  int    references;
  u_int    active_point;

  struct window *window;
  struct options  *options;

  struct layout_cell *layout_cell;
  struct layout_cell *saved_layout_cell;

  u_int    sx;
  u_int    sy;

  int    xoff;
  int    yoff;

  int    flags;
#define PANE_REDRAW 0x1
#define PANE_DROP 0x2
#define PANE_FOCUSED 0x4
#define PANE_VISITED 0x8
#define PANE_ZOOMED 0x10
#define PANE_NEWSTATUS 0x20
#define PANE_INPUTOFF 0x40
#define PANE_CHANGED 0x80
#define PANE_EXITED 0x100
#define PANE_STATUSREADY 0x200
#define PANE_STATUSDRAWN 0x400
#define PANE_EMPTY 0x800
#define PANE_STYLECHANGED 0x1000
#define PANE_THEMECHANGED 0x2000
#define PANE_UNSEENCHANGES 0x4000
#define PANE_REDRAWSCROLLBAR 0x8000
#define PANE_DESTROYED 0x10000
#define PANE_CMDRUNNING 0x20000
#define PANE_ACTIVITY 0x40000
#define PANE_CLOSEONCLICK 0x80000
#define PANE_CAPTUREALLKEYS 0x100000
#define PANE_FLOATOVERZOOM 0x200000

  bitstr_t  *sync_dirty;
  u_int    sync_dirty_size;

  u_int    sb_slider_y;
  u_int    sb_slider_h;
  int    sb_auto_visible;
  int    sb_auto_hover;
  struct event   sb_auto_timer;

  int    argc;
  char         **argv;
  char    *shell;
  char    *cwd;

  pid_t    pid;
  char     tty[TTY_NAME_MAX];
  int    status;
  struct timeval   dead_time;
  struct cmdq_item *wait_item;  /* new-pane -W: waiting for pane exit */
  struct spawn_editor_state *editor;

  time_t     last_output_time;
  time_t     last_prompt_time;
  time_t     cmd_start_time;
  time_t     cmd_end_time;
  int    cmd_status;

  int    fd;
  struct bufferevent *event;

  struct window_pane_offset offset;
  size_t     base_offset;

  struct window_pane_resizes resize_queue;
  struct event   resize_timer;
  struct event   sync_timer;

  struct input_ctx *ictx;

  struct grid_cell cached_gc;
  struct grid_cell cached_active_gc;
  u_int    cached_dim;
  u_int    cached_active_dim;
  struct colour_palette palette;
  enum client_theme last_theme;
  struct style_line_entry border_status_line;

  int    pipe_fd;
  pid_t    pipe_pid;
  struct bufferevent *pipe_event;
  struct window_pane_offset pipe_offset;

  struct screen *screen;
  struct screen  base;

  struct screen  status_screen;

  TAILQ_HEAD(, window_mode_entry) modes;

  char    *searchstr;
  int    searchregex;

  struct prompt *prompt;
  struct window_pane_prompt *prompt_data;
  u_int    prompt_cx;

  int    border_gc_set;
  struct grid_cell border_gc;
  int    active_border_gc_set;
  struct grid_cell active_border_gc;

  int    control_bg;
  int    control_fg;

  struct style   scrollbar_style;

  struct visible_ranges r;

  TAILQ_ENTRY(window_pane) entry;  /* link in list of all panes */
  TAILQ_ENTRY(window_pane) sentry; /* link in list of last visited */
        TAILQ_ENTRY(window_pane) zentry; /* z-index link in list of all panes */
  RB_ENTRY(window_pane) tree_entry;
};
TAILQ_HEAD(window_panes, window_pane);
TAILQ_HEAD(window_panes_zindex, window_pane);
RB_HEAD(window_pane_tree, window_pane);

/* Window structure. */
struct window {
  u_int      id;
  void      *latest;

  char      *name;
  struct event     name_event;
  struct timeval     name_time;

  struct event     alerts_timer;
  struct event     offset_timer;

  struct timeval     activity_time;
  struct timeval     creation_time;

  struct window_pane  *active;
  struct window_pane  *modal;
  struct window_pane  *modal_last;
  struct window_pane  *was_zoomed;
  struct window_panes    last_panes;
  struct window_panes      z_index;
  struct window_panes  panes;

  int      lastlayout;
  struct layout_cell  *layout_root;
  struct layout_cell  *saved_layout_root;
  char      *old_layout;

  u_int      sx;
  u_int      sy;
  u_int      manual_sx;
  u_int      manual_sy;
  u_int      xpixel;
  u_int      ypixel;

  u_int      new_sx;
  u_int      new_sy;
  u_int      new_xpixel;
  u_int      new_ypixel;

  uint64_t     redraw_scene_generation;

  struct menu_data  *menu;
  u_int      menu_last_px;
  u_int      menu_last_py;

  u_int      last_new_pane_x;
  u_int      last_new_pane_y;

  int      sb;
  int      sb_pos;

  struct grid_cell   inside_cell;
  struct grid_cell   outside_cell;
  int      flags;
#define WINDOW_BELL 0x1
#define WINDOW_ACTIVITY 0x2
#define WINDOW_SILENCE 0x4
#define WINDOW_ZOOMED 0x8
#define WINDOW_WASZOOMED 0x10
#define WINDOW_RESIZE 0x20
#define WINDOW_ALERTFLAGS (WINDOW_BELL|WINDOW_ACTIVITY|WINDOW_SILENCE)

  int      alerts_queued;
  TAILQ_ENTRY(window)  alerts_entry;

  struct options    *options;

  u_int      references;
  TAILQ_HEAD(, winlink)  winlinks;

  RB_ENTRY(window)   entry;
};
RB_HEAD(windows, window);

/* Entry on local window list. */
struct winlink {
  int    idx;
  struct session  *session;
  struct window *window;

  int    flags;
#define WINLINK_BELL 0x1
#define WINLINK_ACTIVITY 0x2
#define WINLINK_SILENCE 0x4
#define WINLINK_ALERTFLAGS (WINLINK_BELL|WINLINK_ACTIVITY|WINLINK_SILENCE)
#define WINLINK_VISITED 0x8

  RB_ENTRY(winlink) entry;
  TAILQ_ENTRY(winlink) wentry;
  TAILQ_ENTRY(winlink) sentry;
};
RB_HEAD(winlinks, winlink);
TAILQ_HEAD(winlink_stack, winlink);

/* Window size option. */
#define WINDOW_SIZE_LARGEST 0
#define WINDOW_SIZE_SMALLEST 1
#define WINDOW_SIZE_MANUAL 2
#define WINDOW_SIZE_LATEST 3

/* Pane border status option. */
#define PANE_STATUS_OFF 0
#define PANE_STATUS_TOP 1
#define PANE_STATUS_BOTTOM 2
#define PANE_STATUS_TOP_FLOATING 3
#define PANE_STATUS_BOTTOM_FLOATING 4

/* Pane scrollbars option. */
#define PANE_SCROLLBARS_OFF 0
#define PANE_SCROLLBARS_MODAL 1
#define PANE_SCROLLBARS_ALWAYS 2
#define PANE_SCROLLBARS_AUTOHIDE 3

/* Pane scrollbars position option. */
#define PANE_SCROLLBARS_RIGHT 0
#define PANE_SCROLLBARS_LEFT 1

/* Pane scrollbars width, padding and fill character. */
#define PANE_SCROLLBARS_DEFAULT_PADDING 0
#define PANE_SCROLLBARS_DEFAULT_WIDTH 1
#define PANE_SCROLLBARS_CHARACTER ' '

/* True if screen in alternate screen. */
#define SCREEN_IS_ALTERNATE(s) ((s)->saved_grid != NULL)

/* Layout direction. */
enum layout_type {
  LAYOUT_LEFTRIGHT,
  LAYOUT_TOPBOTTOM,
  LAYOUT_WINDOWPANE
};

/* Layout cell sizes and position. */
struct layout_geometry {
  u_int sx;
  u_int sy;
  int xoff;
  int yoff;
};

/* Layout cells queue. */
TAILQ_HEAD(layout_cells, layout_cell);

/* Layout cell. */
struct layout_cell {
  enum layout_type   type;

  int      flags;
#define LAYOUT_CELL_FLOATING 0x1

  struct layout_cell  *parent;

  struct layout_geometry   g;
  struct layout_geometry   fg; /* saved floating pane */

  struct window_pane  *wp;
  struct layout_cells  cells;

  TAILQ_ENTRY(layout_cell) entry;
};

/* Environment variable. */
struct environ_entry {
  char    *name;
  char    *value;

  int    flags;
#define ENVIRON_HIDDEN 0x1

  RB_ENTRY(environ_entry) entry;
};

/* Client session. */
struct session_group {
  const char    *name;
  TAILQ_HEAD(, session)  sessions;

  RB_ENTRY(session_group)  entry;
};
RB_HEAD(session_groups, session_group);

struct session {
  u_int    id;

  char    *name;
  const char  *cwd;

  struct timeval   creation_time;
  struct timeval   last_attached_time;
  struct timeval   activity_time;
  struct timeval   last_activity_time;

  struct event   lock_timer;

  struct winlink  *curw;
  struct winlink_stack lastw;
  struct winlinks  windows;

  int    statusat;
  u_int    statuslines;

  struct options  *options;

#define SESSION_ALERTED 0x1
  int    flags;

  u_int    attached;

  struct termios  *tio;

  struct environ  *environ;

  int    references;

  TAILQ_ENTRY(session) gentry;
  RB_ENTRY(session)    entry;
};
RB_HEAD(sessions, session);

/* Mouse button masks. */
#define MOUSE_MASK_BUTTONS 195
#define MOUSE_MASK_SHIFT 4
#define MOUSE_MASK_META 8
#define MOUSE_MASK_CTRL 16
#define MOUSE_MASK_DRAG 32
#define MOUSE_MASK_MODIFIERS (MOUSE_MASK_SHIFT|MOUSE_MASK_META|MOUSE_MASK_CTRL)

/* Mouse wheel type. */
#define MOUSE_WHEEL_UP 64
#define MOUSE_WHEEL_DOWN 65

/* Mouse button type. */
#define MOUSE_BUTTON_1 0
#define MOUSE_BUTTON_2 1
#define MOUSE_BUTTON_3 2
#define MOUSE_BUTTON_6 66
#define MOUSE_BUTTON_7 67
#define MOUSE_BUTTON_8 128
#define MOUSE_BUTTON_9 129
#define MOUSE_BUTTON_10 130
#define MOUSE_BUTTON_11 131

/* Mouse helpers. */
#define MOUSE_BUTTONS(b) ((b) & MOUSE_MASK_BUTTONS)
#define MOUSE_WHEEL(b) \
  (((b) & MOUSE_MASK_BUTTONS) == MOUSE_WHEEL_UP || \
   ((b) & MOUSE_MASK_BUTTONS) == MOUSE_WHEEL_DOWN)
#define MOUSE_DRAG(b) ((b) & MOUSE_MASK_DRAG)
#define MOUSE_RELEASE(b) (((b) & MOUSE_MASK_BUTTONS) == 3)

/* Mouse input. */
struct mouse_event {
  int   valid;
  int   ignore;

  key_code  key;

  int   statusat;
  u_int   statuslines;

  u_int   x;
  u_int   y;
  u_int   b;

  u_int   lx;
  u_int   ly;
  u_int   lb;

  u_int   ox;
  u_int   oy;

  int   s;
  int   w;
  int   wp;

  u_int   sgr_type;
  u_int   sgr_b;
};

/* Key event. */
struct key_event {
  struct client   *client;

  key_code     key;
  struct mouse_event   m;

  char      *buf;
  size_t       len;
};

/* Terminal definition. */
struct tty_term {
  char    *name;
  struct tty  *tty;
  int    applied_features;

  char     acs[UCHAR_MAX + 1][2];

  struct tty_code *codes;

#define TERM_256COLOURS 0x1
#define TERM_NOAM 0x2
#define TERM_DECSLRM 0x4
#define TERM_DECFRA 0x8
#define TERM_RGBCOLOURS 0x10
#define TERM_VT100LIKE 0x20
#define TERM_SIXEL 0x40
#define TERM_INVALIDMS 0x80
  int    flags;

  LIST_ENTRY(tty_term) entry;
};
LIST_HEAD(tty_terms, tty_term);

/* Terminal style context. */
struct tty_style_ctx {
  const struct grid_cell  *defaults;
  struct colour_palette *palette;
  u_int      dim;
  struct hyperlinks *hyperlinks;
};

/* Client terminal. */
struct tty {
  struct client *client;
  struct event   start_timer;
  struct event   clipboard_timer;
  time_t     last_requests;

  u_int    sx;
  u_int    sy;
        /* Cell size in pixels. */
  u_int    xpixel;
  u_int    ypixel;

  u_int    cx;
  u_int    cy;
  enum screen_cursor_style cstyle;
  int    ccolour;

        /* Properties of the area being drawn on. */
        /* When true, the drawing area is bigger than the terminal. */
  int    oflag;
  u_int    oox;
  u_int    ooy;
  u_int    osx;
  u_int    osy;

  int    mode;
  int              fg;
  int              bg;

  u_int    rlower;
  u_int    rupper;

  u_int    rleft;
  u_int    rright;

  struct event   event_in;
  struct evbuffer *in;
  struct event   event_out;
  struct evbuffer *out;
  struct event   timer;
  size_t     discarded;

  struct termios   tio;
  struct visible_ranges r;

  struct grid_cell cell;
  struct grid_cell last_cell;

#define TTY_NOCURSOR 0x1
#define TTY_FREEZE 0x2
#define TTY_TIMER 0x4
#define TTY_NOBLOCK 0x8
#define TTY_STARTED 0x10
#define TTY_OPENED 0x20
#define TTY_OSC52QUERY 0x40
#define TTY_BLOCK 0x80
#define TTY_HAVEDA 0x100
#define TTY_HAVEXDA 0x200
#define TTY_SYNCING 0x400
#define TTY_HAVEDA2 0x800
#define TTY_WINSIZEQUERY 0x1000
#define TTY_WAITFG 0x2000
#define TTY_WAITBG 0x4000
#define TTY_BRACKETPASTE 0x8000
#define TTY_HAVESYNC 0x10000
#define TTY_ALL_REQUEST_FLAGS \
  (TTY_HAVEDA|TTY_HAVEDA2|TTY_HAVEXDA|TTY_HAVESYNC)
  int    flags;

  struct tty_term *term;

  u_int    mouse_last_x;
  u_int    mouse_last_y;
  u_int    mouse_last_b;
  int    mouse_drag_flag;
  u_int    mouse_drag_x;
  u_int    mouse_drag_y;
  int    mouse_scrolling_flag;
  int    mouse_slider_mpos;
  int              mouse_last_pane;
  void    (*mouse_drag_update)(struct client *,
          struct mouse_event *);
  void    (*mouse_drag_release)(struct client *,
          struct mouse_event *);

  struct event   key_timer;
  struct tty_key  *key_tree;
};

/* Terminal command context. */
typedef void (*tty_ctx_redraw_cb)(const struct tty_ctx *);
typedef int (*tty_ctx_set_client_cb)(struct tty_ctx *, struct client *);
struct tty_ctx {
  struct screen   *s;

  tty_ctx_redraw_cb  redraw_cb;
  tty_ctx_set_client_cb  set_client_cb;
  void      *arg;

  const struct grid_cell  *cell;
  int                      flags;
#define TTY_CTX_WRAPPED 0x1
#define TTY_CTX_INVISIBLE_PANES 0x2
#define TTY_CTX_WINDOW_BIGGER 0x4
#define TTY_CTX_SYNC 0x8
#define TTY_CTX_OVERLAY_SYNC 0x10
#define TTY_CTX_CELL_INVALIDATE 0x20
#define TTY_CTX_PANE_OBSCURED 0x40

  union {
    u_int      n;

    struct {
      const char  *data;
      size_t     size;
    } data;

    struct {
      const char  *clip;
      const char  *data;
      size_t     size;
    } sel;

#ifdef ENABLE_SIXEL
    struct image    *image;
#endif
  };

  /*
   * Cursor and region position before the screen was updated - this is
   * where the command should be applied; the values in the screen have
   * already been updated.
   */
  u_int      ocx;
  u_int      ocy;

  u_int      orupper;
  u_int      orlower;

  /* Target region (usually pane) offset and size. */
  int      xoff;
  int      yoff;
  int      rxoff;
  int      ryoff;
  u_int      sx;
  u_int      sy;

  /* The background colour used for clearing (erasing). */
  u_int      bg;

  /* The default colours and palette. */
  struct grid_cell   defaults;
  struct tty_style_ctx   style_ctx;

  /* Containing region (usually window) offset and size. */
  u_int      wox;
  u_int      woy;
  u_int      wsx;
  u_int      wsy;
};

/* Saved message entry. */
struct message_entry {
  char        *msg;
  u_int        msg_num;
  struct timeval       msg_time;

  TAILQ_ENTRY(message_entry)   entry;
};
TAILQ_HEAD(message_list, message_entry);

/* Argument type. */
enum args_type {
  ARGS_NONE,
  ARGS_STRING,
  ARGS_COMMANDS
};

/* Argument value. */
struct args_value {
  enum args_type     type;
  union {
    char    *string;
    struct cmd_list *cmdlist;
  };
  char      *cached;
  TAILQ_ENTRY(args_value)  entry;
};

/* Arguments set. */
struct args_entry;
RB_HEAD(args_tree, args_entry);

/* Arguments parsing type. */
enum args_parse_type {
  ARGS_PARSE_INVALID,
  ARGS_PARSE_STRING,
  ARGS_PARSE_COMMANDS_OR_STRING,
  ARGS_PARSE_COMMANDS
};

/* Arguments parsing state. */
typedef enum args_parse_type (*args_parse_cb)(struct args *, u_int, char **);
struct args_parse {
  const char  *template;
  int    lower;
  int    upper;
  args_parse_cb  cb;
};

/* Command find structures. */
enum cmd_find_type {
  CMD_FIND_PANE,
  CMD_FIND_WINDOW,
  CMD_FIND_SESSION,
};
struct cmd_find_state {
  int      flags;
  struct cmd_find_state *current;

  struct session    *s;
  struct winlink    *wl;
  struct window   *w;
  struct window_pane  *wp;
  int      idx;
};

/* Command find flags. */
#define CMD_FIND_PREFER_UNATTACHED 0x1
#define CMD_FIND_QUIET 0x2
#define CMD_FIND_WINDOW_INDEX 0x4
#define CMD_FIND_DEFAULT_MARKED 0x8
#define CMD_FIND_EXACT_SESSION 0x10
#define CMD_FIND_EXACT_WINDOW 0x20
#define CMD_FIND_CANFAIL 0x40

/* List of commands. */
struct cmd_list {
  int    references;
  u_int    group;
  struct cmds *list;
};

/* Command return values. */
enum cmd_retval {
  CMD_RETURN_ERROR = -1,
  CMD_RETURN_NORMAL = 0,
  CMD_RETURN_WAIT,
  CMD_RETURN_STOP
};

/* Command parse result. */
enum cmd_parse_status {
  CMD_PARSE_ERROR,
  CMD_PARSE_SUCCESS
};
struct cmd_parse_result {
  enum cmd_parse_status  status;
  struct cmd_list   *cmdlist;
  char      *error;
};
struct cmd_parse_input {
  int      flags;
#define CMD_PARSE_QUIET 0x1
#define CMD_PARSE_PARSEONLY 0x2
#define CMD_PARSE_NOALIAS 0x4
#define CMD_PARSE_VERBOSE 0x8
#define CMD_PARSE_ONEGROUP 0x10

  const char    *file;
  u_int      line;

  struct cmdq_item  *item;
  struct client   *c;
  struct cmd_find_state  fs;
};

/* Command queue flags. */
#define CMDQ_STATE_REPEAT 0x1
#define CMDQ_STATE_CONTROL 0x2
#define CMDQ_STATE_NOHOOKS 0x4

/* Command queue callback. */
typedef enum cmd_retval (*cmdq_cb) (struct cmdq_item *, void *);

/* Command definition flag. */
struct cmd_entry_flag {
  char       flag;
  enum cmd_find_type   type;
  int      flags;
};

/* Command definition. */
struct cmd_entry {
  const char    *name;
  const char    *alias;

  struct args_parse  args;
  const char    *usage;

  struct cmd_entry_flag  source;
  struct cmd_entry_flag  target;

#define CMD_STARTSERVER 0x1
#define CMD_READONLY 0x2
#define CMD_AFTERHOOK 0x4
#define CMD_CLIENT_CFLAG 0x8
#define CMD_CLIENT_TFLAG 0x10
#define CMD_CLIENT_CANFAIL 0x20
  int    flags;

  enum cmd_retval  (*exec)(struct cmd *, struct cmdq_item *);
};

/* Status line. */
#define STATUS_LINES_LIMIT 5
struct status_line {
  struct event     timer;

  struct screen    screen;
  struct screen   *active;
  int      references;

  u_int      prompt_cx;

  struct grid_cell   style;
  struct style_line_entry entries[STATUS_LINES_LIMIT];
};

/* File in client. */
typedef void (*client_file_cb) (struct client *, const char *, int, int,
    struct evbuffer *, void *);
struct client_file {
  struct client     *c;
  struct tmuxpeer     *peer;
  struct client_files   *tree;
  int        references;
  int        stream;

  char        *path;
  struct evbuffer     *buffer;
  struct bufferevent    *event;

  int        fd;
  int        error;
  int        closed;

  client_file_cb       cb;
  void        *data;

  RB_ENTRY(client_file)    entry;
};
RB_HEAD(client_files, client_file);

/* Maximum time to be pasting. */
#define CLIENT_PASTE_TIME_LIMIT 5

/* Prompt type. */
#define PROMPT_NTYPES 2
enum prompt_type {
  PROMPT_TYPE_COMMAND,
  PROMPT_TYPE_SEARCH,
  PROMPT_TYPE_INVALID = 0xff
};

/* Prompt result. */
enum prompt_result {
  PROMPT_CONTINUE,
  PROMPT_CLOSE
};

/* Prompt key result. */
enum prompt_key_result {
  PROMPT_KEY_NOT_HANDLED,
  PROMPT_KEY_HANDLED,
  PROMPT_KEY_CLOSE,
  PROMPT_KEY_MOVE
};

/* Prompt callbacks. */
typedef enum prompt_result (*prompt_input_cb)(void *, const char *,
    enum prompt_key_result);
typedef enum prompt_result (*status_prompt_input_cb)(struct client *, void *,
    const char *, enum prompt_key_result);
typedef enum prompt_result (*mode_tree_prompt_input_cb)(struct client *, void *,
    const char *, enum prompt_key_result);
typedef void (*prompt_free_cb)(void *);

/* Prompt flags. */
#define PROMPT_SINGLE 0x1
#define PROMPT_NUMERIC 0x2
#define PROMPT_INCREMENTAL 0x4
#define PROMPT_NOFORMAT 0x8
#define PROMPT_KEY 0x10
#define PROMPT_ACCEPT 0x20
#define PROMPT_QUOTENEXT 0x40
#define PROMPT_BSPACE_EXIT 0x80
#define PROMPT_NOFREEZE 0x100
#define PROMPT_COMMANDMODE 0x200
#define PROMPT_ISPANE 0x400
#define PROMPT_ISMODE 0x800
#define PROMPT_EDITARROWS 0x1000

/* Prompt create data. */
struct prompt_create_data {
  struct cmd_find_state *fs;
  const char    *prompt;
  const char    *input;
  enum prompt_type   type;
  int      flags;

  struct grid_cell   style;
  struct grid_cell   command_style;
  const char    *style_str;
  const char    *command_style_str;
  enum screen_cursor_style cstyle;
  enum screen_cursor_style command_cstyle;
  int      ccolour;
  int      command_ccolour;
  int      cmode;
  int      command_cmode;
  const char    *message_format;
  int      keys;
  const char    *word_separators;

  prompt_input_cb    inputcb;
  prompt_free_cb     freecb;
  void      *data;
};

/* Prompt draw data. */
struct prompt_draw_data {
  struct screen_write_ctx *ctx;
  u_int     *cursor_x;

  u_int      area_x;
  u_int      area_width;
  u_int      prompt_line;
};

/* Overlay callbacks */
typedef struct visible_ranges *(*overlay_check_cb)(struct client *, void *,
    u_int, u_int, u_int);
typedef struct screen *(*overlay_mode_cb)(struct client *, void *, u_int *,
    u_int *);
typedef void (*overlay_draw_cb)(struct client *, void *);
typedef int (*overlay_key_cb)(struct client *, void *, struct key_event *);
typedef void (*overlay_free_cb)(struct client *, void *);
typedef void (*overlay_resize_cb)(struct client *, void *);

/* Client connection. */
struct client {
  const char    *name;
  struct tmuxpeer   *peer;
  const char    *user;
  struct cmdq_list  *queue;

  struct control_state  *control_state;
  u_int      pause_age;

  pid_t      pid;
  int      fd;
  int      out_fd;
  struct event     event;
  int      retval;

  struct timeval     creation_time;
  struct timeval     activity_time;
  struct timeval     last_activity_time;

  struct environ    *environ;
  struct format_job_tree  *jobs;

  char      *title;
  char      *path;
  const char    *cwd;
  struct progress_bar  progress_bar;

  char      *term_name;
  int      term_features;
  int      term_nofeatures;
  char      *term_type;
  char           **term_caps;
  u_int      term_ncaps;

  char      *ttyname;
  struct tty     tty;

  size_t       written;
  size_t       discarded;
  size_t       redraw;

  struct redraw_scene *redraw_scene;

  struct event     repeat_timer;

  struct event     click_timer;
  int      click_loc;
  int      click_wp;

  struct event     exit_timer;
  u_int      click_button;
  struct mouse_event   click_event;

  struct status_line   status;
  struct event     cycle_timer;
  enum client_theme  theme;

  struct input_requests  input_requests;

#define CLIENT_TERMINAL 0x1
#define CLIENT_LOGIN 0x2
#define CLIENT_EXIT 0x4
#define CLIENT_REDRAWWINDOW 0x8
#define CLIENT_REDRAWSTATUS 0x10
#define CLIENT_REPEAT 0x20
#define CLIENT_SUSPENDED 0x40
#define CLIENT_ATTACHED 0x80
#define CLIENT_EXITED 0x100
#define CLIENT_DEAD 0x200
#define CLIENT_REDRAWBORDERS 0x400
#define CLIENT_READONLY 0x800
#define CLIENT_NOSTARTSERVER 0x1000
#define CLIENT_CONTROL 0x2000
#define CLIENT_CONTROLCONTROL 0x4000
#define CLIENT_FOCUSED 0x8000
#define CLIENT_UTF8 0x10000
#define CLIENT_IGNORESIZE 0x20000
#define CLIENT_IDENTIFIED 0x40000
#define CLIENT_STATUSFORCE 0x80000
#define CLIENT_DOUBLECLICK 0x100000
#define CLIENT_TRIPLECLICK 0x200000
#define CLIENT_SIZECHANGED 0x400000
#define CLIENT_STATUSOFF 0x800000
#define CLIENT_REDRAWSTATUSALWAYS 0x1000000
#define CLIENT_REDRAWOVERLAY 0x2000000
#define CLIENT_CONTROL_NOOUTPUT 0x4000000
#define CLIENT_DEFAULTSOCKET 0x8000000
#define CLIENT_STARTSERVER 0x10000000
#define CLIENT_REDRAWMENU 0x20000000
#define CLIENT_NOFORK 0x40000000
#define CLIENT_REDRAWSCROLLBARS 0x80000000ULL
#define CLIENT_CONTROL_PAUSEAFTER 0x100000000ULL
#define CLIENT_CONTROL_WAITEXIT 0x200000000ULL
#define CLIENT_WINDOWSIZECHANGED 0x400000000ULL
/* 0x800000000ULL unused */
#define CLIENT_BRACKETPASTING 0x1000000000ULL
#define CLIENT_ASSUMEPASTING 0x2000000000ULL
#define CLIENT_WRITE_ACK 0x4000000000ULL
#define CLIENT_NO_DETACH_ON_DESTROY 0x8000000000ULL
#define CLIENT_ALLREDRAWFLAGS   \
  (CLIENT_REDRAWWINDOW|   \
   CLIENT_REDRAWSTATUS|   \
   CLIENT_REDRAWSTATUSALWAYS| \
   CLIENT_REDRAWBORDERS|   \
   CLIENT_REDRAWOVERLAY|   \
   CLIENT_REDRAWMENU)
#define CLIENT_UNATTACHEDFLAGS  \
  (CLIENT_DEAD|   \
   CLIENT_SUSPENDED| \
   CLIENT_EXIT)
#define CLIENT_NODETACHFLAGS  \
  (CLIENT_DEAD|   \
   CLIENT_EXIT)
#define CLIENT_NOSIZEFLAGS  \
  (CLIENT_DEAD|   \
   CLIENT_SUSPENDED| \
   CLIENT_EXIT)
  uint64_t     flags;

  enum {
    CLIENT_EXIT_RETURN,
    CLIENT_EXIT_SHUTDOWN,
    CLIENT_EXIT_DETACH
  }      exit_type;
  enum msgtype     exit_msgtype;
  char      *exit_session;
  char      *exit_message;

  struct key_table  *keytable;
  key_code     last_key;
  time_t       paste_time;

  int      message_ignore_keys;
  int      message_ignore_styles;
  char      *message_string;
  struct event     message_timer;

  struct prompt   *prompt;

  struct session    *session;
  struct session    *last_session;

  int      references;

  int    theme_colours[COLOUR_THEME_COUNT];

  void      *pan_window;
  u_int      pan_ox;
  u_int      pan_oy;

  overlay_check_cb   overlay_check;
  overlay_mode_cb    overlay_mode;
  overlay_draw_cb    overlay_draw;
  overlay_key_cb     overlay_key;
  overlay_free_cb    overlay_free;
  overlay_resize_cb  overlay_resize;
  void      *overlay_data;
  struct event     overlay_timer;

  struct client_files  files;
  u_int      source_file_depth;

  u_int     *clipboard_panes;
  u_int      clipboard_npanes;

  TAILQ_ENTRY(client)  entry;
};
TAILQ_HEAD(clients, client);

/* Monitor. */
enum monitor_type {
  MONITOR_SESSION,
  MONITOR_PANE,
  MONITOR_ALL_PANES,
  MONITOR_WINDOW,
  MONITOR_ALL_WINDOWS
};
#define MONITOR_NOTIFY_INITIAL 0x1
#define MONITOR_NOTIFY_TRUE 0x2
struct monitor_change {
  const char    *name;
  const char    *value;
  const char    *last;

  struct client   *c;
  struct session    *s;
  struct winlink    *wl;
  struct window_pane  *wp;
};
typedef void (*monitor_cb)(struct monitor_change *, void *);

/* Event payload type. */
enum event_payload_type {
  EVENT_PAYLOAD_STRING,
  EVENT_PAYLOAD_TIME,
  EVENT_PAYLOAD_INT,
  EVENT_PAYLOAD_UINT,
  EVENT_PAYLOAD_CLIENT,
  EVENT_PAYLOAD_SESSION,
  EVENT_PAYLOAD_WINDOW,
  EVENT_PAYLOAD_PANE,
  EVENT_PAYLOAD_POINTER
};

/* Event payload callbacks. */
typedef void (*event_payload_free_cb)(void *);
typedef void (*event_payload_print_cb)(void *, struct evbuffer *);

/* Key binding and key table. */
struct key_binding {
  key_code     key;
  struct cmd_list   *cmdlist;
  const char    *note;
  const char    *tablename;

  int      flags;
#define KEY_BINDING_REPEAT 0x1

  RB_ENTRY(key_binding)  entry;
};
RB_HEAD(key_bindings, key_binding);

struct key_table {
  const char    *name;
  struct timeval     activity_time;
  struct key_bindings  key_bindings;
  struct key_bindings  default_key_bindings;

  u_int      references;

  RB_ENTRY(key_table)  entry;
};
RB_HEAD(key_tables, key_table);

/* Option data. */
RB_HEAD(options_array, options_array_item);
union options_value {
  char      *string;
  long long    number;
  struct style     style;
  struct options_array   array;
  struct cmd_list   *cmdlist;
};

/* Option table entries. */
enum options_table_type {
  OPTIONS_TABLE_STRING,
  OPTIONS_TABLE_NUMBER,
  OPTIONS_TABLE_KEY,
  OPTIONS_TABLE_COLOUR,
  OPTIONS_TABLE_FLAG,
  OPTIONS_TABLE_CHOICE,
  OPTIONS_TABLE_COMMAND
};

#define OPTIONS_TABLE_NONE 0
#define OPTIONS_TABLE_SERVER 0x1
#define OPTIONS_TABLE_SESSION 0x2
#define OPTIONS_TABLE_WINDOW 0x4
#define OPTIONS_TABLE_PANE 0x8

#define OPTIONS_TABLE_IS_ARRAY 0x1
#define OPTIONS_TABLE_IS_HOOK 0x2
#define OPTIONS_TABLE_IS_STYLE 0x4
#define OPTIONS_TABLE_IS_COLOUR 0x8

struct options_table_entry {
  const char     *name;
  const char     *alternative_name;
  enum options_table_type   type;
  int       scope;
  int       flags;

  u_int       minimum;
  u_int       maximum;
  const char    **choices;

  const char     *default_str;
  long long     default_num;
  const char    **default_arr;

  const char     *separator;
  const char     *pattern;

  const char     *text;
  const char     *unit;
};

struct options_name_map {
  const char    *from;
  const char    *to;
};

/* Common command usages. */
#define CMD_TARGET_PANE_USAGE "[-t target-pane]"
#define CMD_TARGET_WINDOW_USAGE "[-t target-window]"
#define CMD_TARGET_SESSION_USAGE "[-t target-session]"
#define CMD_TARGET_CLIENT_USAGE "[-t target-client]"
#define CMD_SRCDST_PANE_USAGE "[-s src-pane] [-t dst-pane]"
#define CMD_SRCDST_WINDOW_USAGE "[-s src-window] [-t dst-window]"
#define CMD_SRCDST_SESSION_USAGE "[-s src-session] [-t dst-session]"
#define CMD_SRCDST_CLIENT_USAGE "[-s src-client] [-t dst-client]"
#define CMD_BUFFER_USAGE "[-b buffer-name]"

/* Spawn common context. */
struct spawn_context {
  struct cmdq_item   *item;

  struct session     *s;
  struct winlink     *wl;
  struct client    *tc;

  struct window_pane   *wp0;
  struct layout_cell   *lc;

  const char     *name;
  char      **argv;
  int       argc;
  struct environ     *environ;

  int       idx;
  const char     *cwd;

  int       flags;
#define SPAWN_KILL 0x1
#define SPAWN_DETACHED 0x2
#define SPAWN_RESPAWN 0x4
#define SPAWN_BEFORE 0x8
#define SPAWN_NONOTIFY 0x10
#define SPAWN_FULLSIZE 0x20
#define SPAWN_EMPTY 0x40
#define SPAWN_ZOOM 0x80
#define SPAWN_FLOATING 0x100
#define SPAWN_HORIZONTAL 0x200
#define SPAWN_SPLIT 0x400
#define SPAWN_MODAL 0x800
#define SPAWN_FLOATOVERZOOM 0x1000
};

/* Paste buffer. */
struct paste_buffer {
  char    *data;
  size_t     size;

  char    *name;
  time_t     created;
  int    automatic;
  u_int    order;

  RB_ENTRY(paste_buffer) name_entry;
  RB_ENTRY(paste_buffer) time_entry;
};

/* Sort orders. */
enum sort_order {
  SORT_ACTIVITY,
  SORT_CREATION,
  SORT_INDEX,
  SORT_MODIFIER,
  SORT_NAME,
  SORT_ORDER,
  SORT_SIZE,
  SORT_Z,
  SORT_END,
};

/* Sort criteria. */
struct sort_criteria {
  enum sort_order  order;
  int    reversed;
  enum sort_order *order_seq; /* available sort orders */
};

/* tmux.c */
extern struct options *global_options;
extern struct options *global_s_options;
extern struct options *global_w_options;
extern struct environ *global_environ;
extern struct timeval  start_time;
extern const char *socket_path;
extern const char *shell_command;
extern int     ptm_fd;
extern const char *shell_command;
int    checkshell(const char *);
void     setblocking(int, int);
char    *shell_argv0(const char *, int);
uint64_t   get_timer(void);
char    *clean_name(const char *, int);
int    check_name(const char *);
const char  *sig2name(int);
const char  *find_cwd(void);
const char  *find_home(void);
const char  *getversion(void);

/* proc.c */
struct imsg;
int proc_send(struct tmuxpeer *, enum msgtype, int, const void *, size_t);
struct tmuxproc *proc_start(const char *);
void  proc_loop(struct tmuxproc *, int (*)(void));
void  proc_exit(struct tmuxproc *);
void  proc_set_signals(struct tmuxproc *, void(*)(int));
void  proc_clear_signals(struct tmuxproc *, int);
struct tmuxpeer *proc_add_peer(struct tmuxproc *, int,
      void (*)(struct imsg *, void *), void *);
void  proc_remove_peer(struct tmuxpeer *);
void  proc_kill_peer(struct tmuxpeer *);
void  proc_flush_peer(struct tmuxpeer *);
void  proc_toggle_log(struct tmuxproc *);
pid_t proc_fork_and_daemon(int *);
uid_t proc_get_peer_uid(struct tmuxpeer *);
gid_t proc_get_peer_gid(struct tmuxpeer *);

/* cfg.c */
extern int cfg_finished;
extern struct client *cfg_client;
extern char **cfg_files;
extern u_int cfg_nfiles;
extern int cfg_quiet;
void  start_cfg(void);
int load_cfg(const char *, struct client *, struct cmdq_item *,
            struct cmd_find_state *, int, struct cmdq_item **);
int load_cfg_from_buffer(const void *, size_t, const char *,
        struct client *, struct cmdq_item *, struct cmd_find_state *,
      int, struct cmdq_item **);
void printflike(1, 2) cfg_add_cause(const char *, ...);
void  cfg_print_causes(struct cmdq_item *);
void  cfg_show_causes(struct session *);

/* paste.c */
const char  *paste_buffer_name(struct paste_buffer *);
u_int    paste_buffer_order(struct paste_buffer *);
time_t     paste_buffer_created(struct paste_buffer *);
const char  *paste_buffer_data(struct paste_buffer *, size_t *);
struct paste_buffer *paste_walk(struct paste_buffer *);
int    paste_is_empty(void);
struct paste_buffer *paste_get_top(char **);
struct paste_buffer *paste_get_name(const char *);
void     paste_free(struct paste_buffer *);
void     paste_add(const char *, char *, size_t);
int    paste_rename(const char *, const char *, char **);
int    paste_set(char *, size_t, const char *, char **);
void     paste_replace(struct paste_buffer *, char *, size_t);
char    *paste_make_sample(struct paste_buffer *);

/* sort.c */
void        sort_next_order(struct sort_criteria *);
enum sort_order     sort_order_from_string(const char *);
const char     *sort_order_to_string(enum sort_order);
int       sort_would_window_tree_swap(struct sort_criteria *,
            struct winlink *, struct winlink *);
struct paste_buffer **sort_get_buffers(u_int *, struct sort_criteria *);
struct client   **sort_get_clients(u_int *, struct sort_criteria *);
struct session    **sort_get_sessions(u_int *, struct sort_criteria *);
struct window_pane  **sort_get_panes(u_int *, struct sort_criteria *);
struct window_pane  **sort_get_panes_session(struct session *, u_int *,
            struct sort_criteria *);
struct window_pane  **sort_get_panes_window(struct window *, u_int *,
            struct sort_criteria *);
struct winlink    **sort_get_winlinks(u_int *, struct sort_criteria *);
struct winlink    **sort_get_winlinks_session(struct session *, u_int *,
            struct sort_criteria *);
struct key_binding  **sort_get_key_bindings(u_int *,
            struct sort_criteria *);
struct key_binding  **sort_get_key_bindings_table(struct key_table *,
            u_int *, struct sort_criteria *);

/* format.c */
#define FORMAT_STATUS 0x1
#define FORMAT_FORCE 0x2
#define FORMAT_NOJOBS 0x4
#define FORMAT_VERBOSE 0x8
#define FORMAT_LAST 0x10
#define FORMAT_NONE 0
#define FORMAT_PANE 0x80000000U
#define FORMAT_WINDOW 0x40000000U
struct format_tree;
struct format_modifier;
typedef void *(*format_cb)(struct format_tree *);
void     format_tidy_jobs(void);
const char  *format_skip(const char *, const char *);
int    format_true(const char *);
struct format_tree *format_create(struct client *, struct cmdq_item *, int,
         int);
void     format_free(struct format_tree *);
void     format_merge(struct format_tree *, struct format_tree *);
struct window_pane *format_get_pane(struct format_tree *);
void printflike(3, 4) format_add(struct format_tree *, const char *,
         const char *, ...);
void     format_add_tv(struct format_tree *, const char *,
         struct timeval *);
void     format_add_cb(struct format_tree *, const char *, format_cb);
void     format_log_debug(struct format_tree *, const char *);
void     format_each(struct format_tree *, void (*)(const char *,
         const char *, void *), void *);
char    *format_pretty_time(time_t, int);
char    *format_expand_time(struct format_tree *, const char *);
char    *format_expand(struct format_tree *, const char *);
char    *format_single(struct cmdq_item *, const char *,
         struct client *, struct session *, struct winlink *,
         struct window_pane *);
char    *format_single_from_state(struct cmdq_item *, const char *,
        struct client *, struct cmd_find_state *);
char    *format_single_from_target(struct cmdq_item *, const char *);
struct format_tree *format_create_defaults(struct cmdq_item *, struct client *,
         struct session *, struct winlink *, struct window_pane *);
struct format_tree *format_create_from_state(struct cmdq_item *,
         struct client *, struct cmd_find_state *);
struct format_tree *format_create_from_target(struct cmdq_item *);
void     format_defaults(struct format_tree *, struct client *,
         struct session *, struct winlink *, struct window_pane *);
void     format_defaults_window(struct format_tree *, struct window *);
void     format_defaults_pane(struct format_tree *,
         struct window_pane *);
void     format_defaults_paste_buffer(struct format_tree *,
         struct paste_buffer *);
void     format_lost_client(struct client *);
char    *format_grid_word(struct grid *, u_int, u_int);
char    *format_grid_hyperlink(struct grid *, u_int, u_int,
         struct screen *);
char    *format_grid_line(struct grid *, u_int);

/* events-payload.c */
struct event_payload *event_payload_create(void);
void   event_payload_free(struct event_payload *);
void printflike(2, 3) event_payload_log(struct event_payload *, const char *,
       ...);
char  *event_payload_item_print(struct event_payload_item *);
void   event_payload_set_target(struct event_payload *,
       struct cmd_find_state *);
int  event_payload_get_target(struct event_payload *,
       struct cmd_find_state *);
void printflike(3, 4) event_payload_set_string(struct event_payload *,
       const char *, const char *, ...);
void   event_payload_set_time(struct event_payload *, const char *, time_t);
void   event_payload_set_int(struct event_payload *, const char *, int);
void   event_payload_set_uint(struct event_payload *, const char *, u_int);
void   event_payload_set_client(struct event_payload *, const char *,
       struct client *);
void   event_payload_set_session(struct event_payload *, const char *,
       struct session *);
void   event_payload_set_window(struct event_payload *, const char *,
       struct window *);
void   event_payload_set_pane(struct event_payload *, const char *,
       struct window_pane *);
void   event_payload_set_pointer(struct event_payload *, const char *, void *,
       event_payload_free_cb, event_payload_print_cb);
const char *event_payload_get_string(struct event_payload *, const char *);
char  *event_payload_print(struct event_payload *, const char *);
void   event_payload_add_formats(struct event_payload *,
       struct format_tree *, const char *);
struct event_payload_item *event_payload_first(struct event_payload *);
struct event_payload_item *event_payload_next(struct event_payload_item *);
const char *event_payload_item_name(struct event_payload_item *);
enum event_payload_type event_payload_item_type(struct event_payload_item *);
time_t   event_payload_get_time(struct event_payload *, const char *);
int  event_payload_get_int(struct event_payload *, const char *, int *);
int  event_payload_get_uint(struct event_payload *, const char *, u_int *);
struct client *event_payload_get_client(struct event_payload *, const char *);
struct session *event_payload_get_session(struct event_payload *, const char *);
struct window *event_payload_get_window(struct event_payload *, const char *);
struct window_pane *event_payload_get_pane(struct event_payload *,
       const char *);
void  *event_payload_get_pointer(struct event_payload *, const char *);

/* events.c */
typedef void (*events_cb)(const char *, struct event_payload *, void *);
struct events_sink *events_add_sink(const char *, events_cb, void *);
void   events_remove_sink(struct events_sink *);
void   events_fire(const char *, struct event_payload *);
void   events_fire_client(const char *, struct client *);
void   events_fire_session(const char *, struct session *);
void   events_fire_window(const char *, struct window *);
void   events_fire_pane(const char *, struct window_pane *);
void   events_fire_winlink(const char *, struct winlink *);

/* format-draw.c */
void   format_draw(struct screen_write_ctx *, const struct grid_cell *,
       u_int, const char *, struct style_ranges *, int);
u_int  format_width(const char *);
char  *format_trim_left(const char *, u_int);
char  *format_trim_right(const char *, u_int);

/* hooks.c */
void   hooks_add_event(const char *);
int  hooks_is_event(const char *);
int  hooks_valid_event_name(const char *);
void   hooks_build_events(void);
void   hooks_run(struct cmdq_item *, const char *);
void   hooks_monitor_add(struct cmdq_item *, struct options *,
      const char *, enum monitor_type, int, const char *,
      int, struct cmd_find_state *, struct session *);
void   hooks_monitor_remove(struct options *, const char *);
void   hooks_monitor_free(void *);
char  *hooks_monitor_to_string(struct options_entry *);
int  hooks_monitor_get(struct options_entry *, enum monitor_type *, int *,
       const char **);
u_int  hooks_monitor_get_fire_count(struct options_entry *);
time_t   hooks_monitor_get_fire_time(struct options_entry *);

/* options.c */
struct options  *options_create(struct options *);
void     options_free(struct options *);
struct options  *options_get_parent(struct options *);
void     options_set_parent(struct options *, struct options *);
struct options_entry *options_first(struct options *);
struct options_entry *options_next(struct options_entry *);
struct options_entry *options_empty(struct options *,
         const struct options_table_entry *);
struct options_entry *options_default(struct options *,
         const struct options_table_entry *);
char    *options_default_to_string(const struct options_table_entry *);
const char  *options_name(struct options_entry *);
struct options  *options_owner(struct options_entry *);
void    *options_get_monitor_data(struct options_entry *);
void     options_set_monitor_data(struct options_entry *, void *);
void     options_hook_fired(struct options_entry *);
u_int    options_get_fire_count(struct options_entry *);
time_t     options_get_fire_time(struct options_entry *);
const struct options_table_entry *options_table_entry(struct options_entry *);
struct options_entry *options_get_only(struct options *, const char *);
struct options_entry *options_get(struct options *, const char *);
void     options_array_clear(struct options_entry *);
union options_value *options_array_get(struct options_entry *, const char *);
union options_value * printflike(2, 3) options_array_getv(
         struct options_entry *, const char *, ...);
int    options_array_set(struct options_entry *, const char *,
         const char *, int, char **);
int    options_array_assign(struct options_entry *, const char *,
         char **);
struct options_array_item *options_array_first(struct options_entry *);
struct options_array_item *options_array_next(struct options_array_item *);
const char  *options_array_item_key(struct options_array_item *);
union options_value *options_array_item_value(struct options_array_item *);
int    options_is_array(struct options_entry *);
int    options_is_string(struct options_entry *);
char    *options_to_string(struct options_entry *, const char *, int);
char    *options_parse(const char *, char **);
struct options_entry *options_parse_get(struct options *, const char *,
         char **, int);
const struct options_table_entry *options_search(const char *);
char    *options_match(const char *, char **, int *);
struct options_entry *options_match_get(struct options *, const char *,
         char **, int, int *);
const char  *options_get_string(struct options *, const char *);
long long  options_get_number(struct options *, const char *);
struct cmd_list *options_get_command(struct options *, const char *);
struct options_entry * printflike(4, 5) options_set_string(struct options *,
         const char *, int, const char *, ...);
struct options_entry *options_set_number(struct options *, const char *,
         long long);
struct options_entry *options_set_command(struct options *, const char *,
         struct cmd_list *);
int    options_scope_from_name(struct args *, int,
         const char *, struct cmd_find_state *, struct options **,
         char **);
int    options_scope_from_flags(struct args *, int,
         struct cmd_find_state *, struct options **, char **);
struct style  *options_string_to_style(struct options *, const char *,
         struct format_tree *);
int    options_from_string(struct options *,
         const struct options_table_entry *, const char *,
         const char *, int, char **);
int    options_find_choice(const struct options_table_entry *,
         const char *, char **);
void     options_push_changes(const char *);
int    options_remove_or_default(struct options_entry *, const char *,
         char **);

/* options-table.c */
extern const struct options_table_entry options_table[];
extern const struct options_name_map  options_other_names[];

/* job.c */
typedef void (*job_update_cb) (struct job *);
typedef void (*job_complete_cb) (struct job *);
typedef void (*job_free_cb) (void *);
#define JOB_NOWAIT 0x1
#define JOB_KEEPWRITE 0x2
#define JOB_PTY 0x4
#define JOB_DEFAULTSHELL 0x8
#define JOB_SHOWSTDERR 0x10
struct job  *job_run(const char *, int, char **, struct environ *,
         struct session *, const char *, job_update_cb,
         job_complete_cb, job_free_cb, void *, int, int, int);
void     job_free(struct job *);
int    job_transfer(struct job *, pid_t *, char *, size_t);
void     job_resize(struct job *, u_int, u_int);
void     job_check_died(pid_t, int);
int    job_get_status(struct job *);
void    *job_get_data(struct job *);
struct bufferevent *job_get_event(struct job *);
void     job_kill_all(void);
int    job_still_running(void);
void     job_print_summary(struct cmdq_item *, int);

/* environ.c */
struct environ *environ_create(void);
void  environ_free(struct environ *);
struct environ_entry *environ_first(struct environ *);
struct environ_entry *environ_next(struct environ_entry *);
void  environ_copy(struct environ *, struct environ *);
struct environ_entry *environ_find(struct environ *, const char *);
void printflike(4, 5) environ_set(struct environ *, const char *, int,
      const char *, ...);
void  environ_clear(struct environ *, const char *);
void  environ_put(struct environ *, const char *, int);
void  environ_unset(struct environ *, const char *);
void  environ_update(struct options *, struct environ *, struct environ *);
void  environ_push(struct environ *);
void printflike(2, 3) environ_log(struct environ *, const char *, ...);
struct environ *environ_for_session(struct session *, int);

/* tty-draw.c */
void  tty_draw_line(struct tty *, struct screen *, u_int, u_int, u_int,
      u_int, u_int, const struct tty_style_ctx *);

/* tty.c */
void  tty_create_log(void);
int tty_window_bigger(struct tty *);
int tty_window_offset(struct tty *, u_int *, u_int *, u_int *, u_int *);
void  tty_update_window_offset(struct window *);
void  tty_update_client_offset(struct client *);
void  tty_raw(struct tty *, const char *);
void  tty_attributes(struct tty *, const struct grid_cell *,
      const struct tty_style_ctx *);
void  tty_reset(struct tty *);
void  tty_region_off(struct tty *);
void  tty_margin_off(struct tty *);
void  tty_cursor(struct tty *, u_int, u_int);
int tty_fake_bce(const struct tty *, const struct grid_cell *, u_int);
void  tty_repeat_space(struct tty *, u_int);
void  tty_clipboard_query(struct tty *);
void  tty_putcode(struct tty *, enum tty_code_code);
void  tty_putcode_i(struct tty *, enum tty_code_code, int);
void  tty_putcode_ii(struct tty *, enum tty_code_code, int, int);
void  tty_putcode_iii(struct tty *, enum tty_code_code, int, int, int);
void  tty_putcode_s(struct tty *, enum tty_code_code, const char *);
void  tty_putcode_ss(struct tty *, enum tty_code_code, const char *,
      const char *);
void  tty_puts(struct tty *, const char *);
void  tty_putc(struct tty *, u_char);
void  tty_putn(struct tty *, const void *, size_t, u_int);
void  tty_cell(struct tty *, const struct grid_cell *,
      const struct tty_style_ctx *);
int tty_init(struct tty *, struct client *);
void  tty_resize(struct tty *);
void  tty_set_size(struct tty *, u_int, u_int, u_int, u_int);
void  tty_invalidate(struct tty *);
void  tty_start_tty(struct tty *);
void  tty_send_requests(struct tty *);
void  tty_repeat_requests(struct tty *, int);
void  tty_stop_tty(struct tty *);
void  tty_set_title(struct tty *, const char *);
void  tty_set_path(struct tty *, const char *);
void  tty_set_progress_bar(struct tty *, struct progress_bar *);
void  tty_default_attributes(struct tty *, u_int,
      const struct tty_style_ctx *);
void  tty_update_mode(struct tty *, int, struct screen *);
const struct grid_cell *tty_check_codeset(struct tty *,
      const struct grid_cell *);
struct visible_ranges *tty_check_overlay_range(struct tty *, u_int, u_int,
      u_int);
void  tty_sync_start(struct tty *);
void  tty_sync_end(struct tty *);
int tty_open(struct tty *, char **);
void  tty_close(struct tty *);
void  tty_free(struct tty *);
void  tty_update_features(struct tty *);
void  tty_set_selection(struct tty *, const char *, const char *, size_t);
void  tty_write(void (*)(struct tty *, const struct tty_ctx *),
      struct tty_ctx *);
void  tty_cmd_alignmenttest(struct tty *, const struct tty_ctx *);
void  tty_cmd_cell(struct tty *, const struct tty_ctx *);
void  tty_cmd_cells(struct tty *, const struct tty_ctx *);
void  tty_cmd_redrawline(struct tty *, const struct tty_ctx *);
void  tty_cmd_clearendofline(struct tty *, const struct tty_ctx *);
void  tty_cmd_clearendofscreen(struct tty *, const struct tty_ctx *);
void  tty_cmd_clearline(struct tty *, const struct tty_ctx *);
void  tty_cmd_clearscreen(struct tty *, const struct tty_ctx *);
void  tty_cmd_clearstartofline(struct tty *, const struct tty_ctx *);
void  tty_cmd_clearstartofscreen(struct tty *, const struct tty_ctx *);
void  tty_cmd_deletecharacter(struct tty *, const struct tty_ctx *);
void  tty_cmd_clearcharacter(struct tty *, const struct tty_ctx *);
void  tty_cmd_deleteline(struct tty *, const struct tty_ctx *);
void  tty_cmd_insertcharacter(struct tty *, const struct tty_ctx *);
void  tty_cmd_insertline(struct tty *, const struct tty_ctx *);
void  tty_cmd_linefeed(struct tty *, const struct tty_ctx *);
void  tty_cmd_scrollup(struct tty *, const struct tty_ctx *);
void  tty_cmd_scrolldown(struct tty *, const struct tty_ctx *);
void  tty_cmd_reverseindex(struct tty *, const struct tty_ctx *);
void  tty_cmd_setselection(struct tty *, const struct tty_ctx *);
void  tty_cmd_rawstring(struct tty *, const struct tty_ctx *);
#ifdef ENABLE_SIXEL
void  tty_cmd_sixelimage(struct tty *, const struct tty_ctx *);
void  tty_draw_images(struct client *, struct window_pane *);
#endif
void  tty_cmd_syncstart(struct tty *, const struct tty_ctx *);
void  tty_default_colours(struct grid_cell *, struct window_pane *, u_int *);

/* tty-term.c */
extern struct tty_terms tty_terms;
u_int    tty_term_ncodes(void);
void     tty_term_apply(struct tty_term *, const char *, int);
void     tty_term_apply_overrides(struct tty_term *);
struct tty_term *tty_term_create(struct tty *, char *, char **, u_int, char **);
void     tty_term_free(struct tty_term *);
int    tty_term_read_list(const char *, int, char ***, u_int *,
         char **);
void     tty_term_free_list(char **, u_int);
int    tty_term_has(struct tty_term *, enum tty_code_code);
int    tty_term_has_name(struct tty_term *, const char *);
const char  *tty_term_string(struct tty_term *, enum tty_code_code);
const char  *tty_term_string_i(struct tty_term *, enum tty_code_code, int);
const char  *tty_term_string_ii(struct tty_term *, enum tty_code_code, int,
         int);
const char  *tty_term_string_iii(struct tty_term *, enum tty_code_code, int,
         int, int);
const char  *tty_term_string_s(struct tty_term *, enum tty_code_code,
         const char *);
const char  *tty_term_string_ss(struct tty_term *, enum tty_code_code,
         const char *, const char *);
int    tty_term_number(struct tty_term *, enum tty_code_code);
int    tty_term_flag(struct tty_term *, enum tty_code_code);
const char  *tty_term_describe(struct tty_term *, enum tty_code_code);

/* tty-features.c */
void     tty_parse_client_features(struct client *, const char *,
         const char *);
void     tty_parse_features(const char *, const char *, int *, int *);
const char  *tty_get_features(int);
int    tty_feature_present(struct tty_term *, const char *);
int    tty_apply_features(struct tty_term *);
void     tty_default_features(struct client *, const char *, u_int);

/* tty-acs.c */
int    tty_acs_needed(struct tty *);
const char  *tty_acs_get(struct tty *, u_char);
int    tty_acs_reverse_get(struct tty *, const char *, size_t);
const struct utf8_data *tty_acs_double_borders(int);
const struct utf8_data *tty_acs_heavy_borders(int);
const struct utf8_data *tty_acs_rounded_borders(int);

/* tty-keys.c */
void    tty_keys_build(struct tty *);
void    tty_keys_free(struct tty *);
int   tty_keys_next(struct tty *);
int   tty_keys_colours(struct tty *, const char *, size_t, size_t *,
         int *, int *);

/* arguments.c */
void     args_set(struct args *, u_char, struct args_value *, int);
struct args   *args_create(void);
struct args *args_parse(const struct args_parse *, struct args_value *,
         u_int, char **);
struct args *args_copy(struct args *, int, char **);
void     args_to_vector(struct args *, int *, char ***);
struct args_value *args_from_vector(int, char **);
void     args_free_value(struct args_value *);
void     args_free_values(struct args_value *, u_int);
void     args_free(struct args *);
char    *args_print(struct args *);
char    *args_escape(const char *);
int    args_has(struct args *, u_char);
const char  *args_get(struct args *, u_char);
u_char     args_first(struct args *, struct args_entry **);
u_char     args_next(struct args_entry **);
u_int    args_count(struct args *);
struct args_value *args_values(struct args *);
struct args_value *args_value(struct args *, u_int);
const char  *args_string(struct args *, u_int);
struct cmd_list *args_make_commands_now(struct cmd *, struct cmdq_item *,
         u_int, int);
struct args_command_state *args_make_commands_prepare(struct cmd *,
         struct cmdq_item *, u_int, const char *, int, int);
struct cmd_list *args_make_commands(struct args_command_state *, int, char **,
         char **);
void     args_make_commands_free(struct args_command_state *);
char    *args_make_commands_get_command(struct args_command_state *);
struct args_value *args_first_value(struct args *, u_char);
struct args_value *args_next_value(struct args_value *);
long long  args_strtonum(struct args *, u_char, long long, long long,
         char **);
long long  args_strtonum_and_expand(struct args *, u_char, long long,
         long long, struct cmdq_item *, char **);
long long  args_percentage(struct args *, u_char, long long,
         long long, long long, char **);
long long  args_string_percentage(const char *, long long, long long,
         long long, char **);
long long  args_percentage_and_expand(struct args *, u_char, long long,
         long long, long long, struct cmdq_item *, char **);
long long  args_string_percentage_and_expand(const char *, long long,
         long long, long long, struct cmdq_item *, char **);

/* cmd-find.c */
int    cmd_find_target(struct cmd_find_state *, struct cmdq_item *,
         const char *, enum cmd_find_type, int);
struct client *cmd_find_best_client(struct session *);
struct client *cmd_find_client(struct cmdq_item *, const char *, int);
void     cmd_find_clear_state(struct cmd_find_state *, int);
int    cmd_find_empty_state(struct cmd_find_state *);
int    cmd_find_valid_state(struct cmd_find_state *);
void     cmd_find_copy_state(struct cmd_find_state *,
         struct cmd_find_state *);
void     cmd_find_from_session(struct cmd_find_state *,
         struct session *, int);
void     cmd_find_from_winlink(struct cmd_find_state *,
         struct winlink *, int);
int    cmd_find_from_session_window(struct cmd_find_state *,
         struct session *, struct window *, int);
int    cmd_find_from_window(struct cmd_find_state *, struct window *,
         int);
void     cmd_find_from_winlink_pane(struct cmd_find_state *,
         struct winlink *, struct window_pane *, int);
int    cmd_find_from_pane(struct cmd_find_state *,
         struct window_pane *, int);
int    cmd_find_from_client(struct cmd_find_state *, struct client *,
         int);
int    cmd_find_from_mouse(struct cmd_find_state *,
         struct mouse_event *, int);
int    cmd_find_from_nothing(struct cmd_find_state *, int);

/* cmd.c */
extern const struct cmd_entry *cmd_table[];
const struct cmd_entry *cmd_find(const char *, char **);
void printflike(3, 4) cmd_log_argv(int, char **, const char *, ...);
void     cmd_prepend_argv(int *, char ***, const char *);
void     cmd_append_argv(int *, char ***, const char *);
int    cmd_pack_argv(int, char **, char *, size_t);
int    cmd_unpack_argv(char *, size_t, int, char ***);
char         **cmd_copy_argv(int, char **);
void     cmd_free_argv(int, char **);
char    *cmd_stringify_argv(int, char **);
char    *cmd_get_alias(const char *);
const struct cmd_entry *cmd_get_entry(struct cmd *);
struct args *cmd_get_args(struct cmd *);
u_int    cmd_get_group(struct cmd *);
void     cmd_get_source(struct cmd *, const char **, u_int *);
int    cmd_get_parse_flags(struct cmd *);
struct cmd  *cmd_parse(struct args_value *, u_int, const char *, u_int, int,
         char **);
struct cmd  *cmd_copy(struct cmd *, int, char **);
void     cmd_free(struct cmd *);
char    *cmd_print(struct cmd *);
struct cmd_list *cmd_list_new(void);
struct cmd_list *cmd_list_copy(const struct cmd_list *, int, char **);
void     cmd_list_append(struct cmd_list *, struct cmd *);
void     cmd_list_append_all(struct cmd_list *, struct cmd_list *);
void     cmd_list_move(struct cmd_list *, struct cmd_list *);
void     cmd_list_free(struct cmd_list *);
#define CMD_LIST_PRINT_ESCAPED 0x1
#define CMD_LIST_PRINT_NO_GROUPS 0x2
char    *cmd_list_print(const struct cmd_list *, int);
struct cmd  *cmd_list_first(struct cmd_list *);
struct cmd  *cmd_list_next(struct cmd *);
int    cmd_list_all_have(struct cmd_list *, int);
int    cmd_list_any_have(struct cmd_list *, int);
int    cmd_mouse_at(struct window_pane *, struct mouse_event *,
         u_int *, u_int *, int);
struct winlink  *cmd_mouse_window(struct mouse_event *, struct session **);
struct window_pane *cmd_mouse_pane(struct mouse_event *, struct session **,
         struct winlink **);
char    *cmd_template_replace(const char *, const char *, int);

/* cmd-attach-session.c */
enum cmd_retval  cmd_attach_session(struct cmdq_item *, const char *, int, int,
         int, const char *, int, const char *);

/* cmd-parse.c */
struct cmd_parse_result *cmd_parse_from_file(FILE *, struct cmd_parse_input *);
struct cmd_parse_result *cmd_parse_from_string(const char *,
         struct cmd_parse_input *);
enum cmd_parse_status cmd_parse_and_insert(const char *,
         struct cmd_parse_input *, struct cmdq_item *,
         struct cmdq_state *, char **);
enum cmd_parse_status cmd_parse_and_append(const char *,
         struct cmd_parse_input *, struct client *,
         struct cmdq_state *, char **);
struct cmd_parse_result *cmd_parse_from_buffer(const void *, size_t,
         struct cmd_parse_input *);
struct cmd_parse_result *cmd_parse_from_arguments(struct args_value *, u_int,
         struct cmd_parse_input *);

/* cmd-queue.c */
struct cmdq_state *cmdq_new_state(struct cmd_find_state *, struct key_event *,
         int);
struct cmdq_state *cmdq_link_state(struct cmdq_state *);
struct cmdq_state *cmdq_copy_state(struct cmdq_state *,
         struct cmd_find_state *);
void      cmdq_free_state(struct cmdq_state *);
void printflike(3, 4) cmdq_add_format(struct cmdq_state *, const char *,
         const char *, ...);
void      cmdq_add_formats(struct cmdq_state *, struct format_tree *);
void      cmdq_merge_formats(struct cmdq_item *, struct format_tree *);
struct cmdq_list *cmdq_new(void);
void cmdq_free(struct cmdq_list *);
const char   *cmdq_get_name(struct cmdq_item *);
struct cmd   *cmdq_get_cmd(struct cmdq_item *);
struct client  *cmdq_get_client(struct cmdq_item *);
struct client  *cmdq_get_target_client(struct cmdq_item *);
struct cmdq_state *cmdq_get_state(struct cmdq_item *);
struct cmd_find_state *cmdq_get_target(struct cmdq_item *);
struct cmd_find_state *cmdq_get_source(struct cmdq_item *);
struct key_event *cmdq_get_event(struct cmdq_item *);
struct cmd_find_state *cmdq_get_current(struct cmdq_item *);
int     cmdq_get_flags(struct cmdq_item *);
struct cmdq_item *cmdq_get_command(struct cmd_list *, struct cmdq_state *);
#define cmdq_get_callback(cb, data) cmdq_get_callback1(#cb, cb, data)
struct cmdq_item *cmdq_get_callback1(const char *, cmdq_cb, void *);
struct cmdq_item *cmdq_get_error(const char *);
struct cmdq_item *cmdq_insert_after(struct cmdq_item *, struct cmdq_item *);
struct cmdq_item *cmdq_append(struct client *, struct cmdq_item *);
void printflike(4, 5) cmdq_insert_hook(struct session *, struct cmdq_item *,
         struct cmd_find_state *, const char *, ...);
void     cmdq_continue(struct cmdq_item *);
u_int    cmdq_next(struct client *);
struct cmdq_item *cmdq_running(struct client *);
void     cmdq_guard(struct cmdq_item *, const char *, int);
void printflike(2, 3) cmdq_print(struct cmdq_item *, const char *, ...);
void     cmdq_print_data(struct cmdq_item *, struct evbuffer *);
void printflike(2, 3) cmdq_error(struct cmdq_item *, const char *, ...);

/* cmd-wait-for.c */
void  cmd_wait_for_flush(void);

/* client.c */
int client_main(struct event_base *, int, char **, uint64_t, int);

/* key-bindings.c */
struct key_table *key_bindings_get_table(const char *, int);
struct key_table *key_bindings_first_table(void);
struct key_table *key_bindings_next_table(struct key_table *);
void   key_bindings_unref_table(struct key_table *);
struct key_binding *key_bindings_get(struct key_table *, key_code);
struct key_binding *key_bindings_get_default(struct key_table *, key_code);
struct key_binding *key_bindings_first(struct key_table *);
struct key_binding *key_bindings_next(struct key_table *, struct key_binding *);
void   key_bindings_add(const char *, key_code, const char *, int,
       struct cmd_list *);
void   key_bindings_remove(const char *, key_code);
void   key_bindings_reset(const char *, key_code);
void   key_bindings_remove_table(const char *);
void   key_bindings_reset_table(const char *);
void   key_bindings_init(void);
int  key_bindings_has_repeat(struct key_binding **, u_int);
struct cmdq_item *key_bindings_dispatch(struct key_binding *,
       struct cmdq_item *, struct client *, struct key_event *,
       struct cmd_find_state *);

/* key-string.c */
key_code   key_string_lookup_string(const char *);
const char  *key_string_lookup_key(key_code, int);

/* alerts.c */
void  alerts_reset_all(void);
void  alerts_queue(struct window *, int);
void  alerts_check_session(struct session *);

/* file.c */
int  file_cmp(struct client_file *, struct client_file *);
RB_PROTOTYPE(client_files, client_file, entry, file_cmp);
struct client_file *file_create_with_peer(struct tmuxpeer *,
      struct client_files *, int, client_file_cb, void *);
struct client_file *file_create_with_client(struct client *, int,
      client_file_cb, void *);
void   file_free(struct client_file *);
void   file_fire_done(struct client_file *);
void   file_fire_read(struct client_file *);
int  file_can_print(struct client *);
void printflike(2, 3) file_print(struct client *, const char *, ...);
void printflike(2, 0) file_vprint(struct client *, const char *, va_list);
void   file_print_buffer(struct client *, void *, size_t);
void printflike(2, 3) file_error(struct client *, const char *, ...);
void   file_write(struct client *, const char *, int, const void *, size_t,
       client_file_cb, void *);
struct client_file *file_read(struct client *, const char *, client_file_cb,
       void *);
void   file_cancel(struct client_file *);
void   file_push(struct client_file *);
int  file_write_left(struct client_files *);
void   file_write_open(struct client_files *, struct tmuxpeer *,
       struct imsg *, int, int, client_file_cb, void *);
void   file_write_data(struct client_files *, struct imsg *);
void   file_write_close(struct client_files *, struct imsg *);
void   file_read_open(struct client_files *, struct tmuxpeer *, struct imsg *,
       int, int, client_file_cb, void *);
int  file_write_ready(struct client_files *, struct imsg *);
int  file_write_done(struct client_files *, struct imsg *);
int  file_read_data(struct client_files *, struct imsg *);
int  file_read_done(struct client_files *, struct imsg *);
void   file_read_cancel(struct client_files *, struct imsg *);

/* server.c */
extern struct tmuxproc *server_proc;
extern struct clients clients;
extern struct cmd_find_state marked_pane;
extern struct message_list message_log;
extern time_t current_time;
void   server_set_marked(struct session *, struct winlink *,
       struct window_pane *);
void   server_clear_marked(void);
int  server_is_marked(struct session *, struct winlink *,
       struct window_pane *);
int  server_check_marked(void);
int  server_start(struct tmuxproc *, uint64_t, struct event_base *, int,
       char *);
void   server_update_socket(void);
void   server_add_accept(int);
void printflike(1, 2) server_add_message(const char *, ...);
int  server_create_socket(uint64_t, char **);

/* server-client.c */
u_int  server_client_how_many(void);
void   server_client_set_overlay(struct client *, u_int, overlay_check_cb,
       overlay_mode_cb, overlay_draw_cb, overlay_key_cb,
       overlay_free_cb, overlay_resize_cb, void *);
void   server_client_clear_overlay(struct client *);
void   server_client_ensure_ranges(struct visible_ranges *, u_int);
int  server_client_ranges_is_empty(struct visible_ranges *);
void   server_client_overlay_range(u_int, u_int, u_int, u_int, u_int, u_int,
       u_int, struct visible_ranges *);
void   server_client_set_key_table(struct client *, const char *);
const char *server_client_get_key_table(struct client *);
int  server_client_check_nested(struct client *);
int  server_client_handle_key(struct client *, struct key_event *);
int  server_client_handle_key_after(struct client *, struct key_event *,
       struct cmdq_item *, struct cmdq_item **);
struct client *server_client_create(int);
int  server_client_open(struct client *, char **);
void   server_client_unref(struct client *);
void   server_client_set_session(struct client *, struct session *);
void   server_client_lost(struct client *);
void   server_client_suspend(struct client *);
void   server_client_detach(struct client *, enum msgtype);
void   server_client_exec(struct client *, const char *);
void   server_client_loop(void);
const char *server_client_get_cwd(struct client *, struct session *);
void   server_client_set_flags(struct client *, const char *);
const char *server_client_get_flags(struct client *);
void   server_client_remove_pane(struct window_pane *);
void   server_client_print(struct client *, int, struct evbuffer *);

/* server-fn.c */
void   server_redraw_client(struct client *);
void   server_client_update_theme_colours(struct client *);
void   server_status_client(struct client *);
void   server_redraw_session(struct session *);
void   server_redraw_session_group(struct session *);
void   server_status_session(struct session *);
void   server_status_session_group(struct session *);
void   server_redraw_window(struct window *);
void   server_redraw_window_menu(struct window *);
void   server_redraw_window_borders(struct window *);
void   server_status_window(struct window *);
void   server_lock(void);
void   server_lock_session(struct session *);
void   server_lock_client(struct client *);
void   server_kill_pane(struct window_pane *);
void   server_kill_window(struct window *, int);
void   server_renumber_session(struct session *);
void   server_renumber_all(void);
int  server_link_window(struct session *,
       struct winlink *, struct session *, int, int, int, char **);
void   server_unlink_window(struct session *, struct winlink *);
void   server_destroy_pane(struct window_pane *, int);
void   server_destroy_session(struct session *);
void   server_check_unattached(void);
void   server_unzoom_window(struct window *);

/* status.c */
void   status_timer_start(struct client *);
void   status_timer_start_all(void);
void   status_update_cache(struct session *);
u_int  status_prompt_line_at(struct client *);
int  status_at_line(struct client *);
u_int  status_line_size(struct client *);
struct style_range *status_get_range(struct client *, u_int, u_int);
void   status_init(struct client *);
void   status_free(struct client *);
int  status_redraw(struct client *);
void printflike(6, 7) status_message_set(struct client *, int, int, int, int,
       const char *, ...);
void   status_message_clear(struct client *);
int  status_message_redraw(struct client *);
void   status_prompt_set(struct client *, struct cmd_find_state *,
       const char *, const char *, status_prompt_input_cb, prompt_free_cb,
       void *, int, enum prompt_type);
void   status_prompt_clear(struct client *);
int  status_prompt_redraw(struct client *);
void   status_prompt_cursor(struct client *, u_int *, u_int *);
enum prompt_key_result status_prompt_key(struct client *, key_code,
       struct mouse_event *);
void   status_prompt_update(struct client *, const char *, const char *);

/* prompt.c */
void   prompt_set_options(struct prompt_create_data *, struct session *);
struct prompt *prompt_create(const struct prompt_create_data *);
void   prompt_free(struct prompt *);
void   prompt_incremental_start(struct prompt *);
void   prompt_draw(struct prompt *, struct prompt_draw_data *);
enum prompt_key_result prompt_key(struct prompt *, key_code, int *);
enum prompt_key_result prompt_mouse(struct prompt *, u_int, u_int, u_int,
       int *);
void   prompt_update(struct prompt *, const char *, const char *);
int  prompt_closed(struct prompt *);
enum prompt_type prompt_type(const char *);
const char *prompt_type_string(enum prompt_type);

/* prompt-history.c */
const char *prompt_up_history(u_int *, u_int);
const char *prompt_down_history(u_int *, u_int);
void   prompt_add_history(const char *, u_int);
u_int  prompt_history_size(enum prompt_type);
const char *prompt_history_get(enum prompt_type, u_int);
void   prompt_history_clear(enum prompt_type);
void   prompt_load_history(void);
void   prompt_save_history(void);

/* resize.c */
void   resize_window(struct window *, u_int, u_int, int, int);
void   default_window_size(struct client *, struct session *, struct window *,
       u_int *, u_int *, u_int *, u_int *, int);
void   recalculate_size(struct window *, int);
void   recalculate_sizes(void);
void   recalculate_sizes_now(int);

/* input.c */
#define INPUT_BUF_DEFAULT_SIZE 1048576
struct input_ctx *input_init(struct window_pane *, struct bufferevent *,
       struct colour_palette *, struct client *);
void   input_free(struct input_ctx *);
void   input_reset(struct input_ctx *, int);
struct evbuffer *input_pending(struct input_ctx *);
void   input_parse_pane(struct window_pane *);
void   input_parse_buffer(struct window_pane *, const u_char *, size_t);
void   input_parse_screen(struct input_ctx *, struct screen *,
       screen_write_init_ctx_cb, void *, const u_char *, size_t);
void   input_reply_clipboard(struct bufferevent *, const char *, size_t,
       const char *, char);
void   input_set_buffer_size(size_t);
void   input_request_reply(struct client *, enum input_request_type, void *);
void   input_cancel_requests(struct client *);

/* input-key.c */
void   input_key_build(void);
int  input_key_pane(struct window_pane *, key_code, struct mouse_event *);
int  input_key(struct screen *, struct bufferevent *, key_code);
int  input_key_get_mouse(struct screen *, struct mouse_event *, u_int,
       u_int, const char **, size_t *);

/* colour.c */
int  colour_find_rgb(u_char, u_char, u_char);
int  colour_join_rgb(u_char, u_char, u_char);
void   colour_split_rgb(int, u_char *, u_char *, u_char *);
int  colour_force_rgb(int);
int  colour_dim(int, u_int);
const char *colour_tostring(int);
const char *colour_toescape(struct client *, int, int);
enum client_theme colour_totheme(int);
int  colour_fromstring(const char *);
const char *colour_theme_option(u_int, enum client_theme);
int  colour_theme_terminal_colour(u_int);
int  colour_256toRGB(int);
int  colour_256to16(int);
int  colour_byname(const char *);
int  colour_parseX11(const char *);
void   colour_palette_init(struct colour_palette *);
void   colour_palette_clear(struct colour_palette *);
void   colour_palette_free(struct colour_palette *);
int  colour_palette_get(struct colour_palette *, int);
int  colour_palette_set(struct colour_palette *, int, int);
void   colour_palette_from_option(struct colour_palette *, struct options *);

/* attributes.c */
const char *attributes_tostring(int);
int  attributes_fromstring(const char *);

/* fuzzy.c */
bitstr_t  *fuzzy_match(const char *, const char *, u_int, u_int *);

/* grid.c */
extern const struct grid_cell grid_default_cell;
void   grid_check_is_clear(struct grid *);
void   grid_empty_line(struct grid *, u_int, u_int);
void   grid_set_tab(struct grid_cell *, u_int);
int  grid_cells_equal(const struct grid_cell *, const struct grid_cell *);
int  grid_cells_look_equal(const struct grid_cell *,
       const struct grid_cell *);
struct grid *grid_create(u_int, u_int, u_int);
void   grid_destroy(struct grid *);
void   grid_free_lines(struct grid *, u_int, u_int);
int  grid_compare(struct grid *, struct grid *);
const char *grid_line_flags_string(int);
const char *grid_cell_flags_string(int);
const char *grid_cell_attr_string(int);
time_t   grid_line_time(const struct grid_line *);
void   grid_collect_history(struct grid *, int);
void   grid_remove_history(struct grid *, u_int );
void   grid_scroll_history(struct grid *, u_int);
void   grid_scroll_history_region(struct grid *, u_int, u_int, u_int);
void   grid_clear_history(struct grid *);
const struct grid_line *grid_peek_line(struct grid *, u_int);
void   grid_get_cell(struct grid *, u_int, u_int, struct grid_cell *);
void   grid_set_cell(struct grid *, u_int, u_int, const struct grid_cell *);
void   grid_set_padding(struct grid *, u_int, u_int, int);
void   grid_set_cells(struct grid *, u_int, u_int, const struct grid_cell *,
       const char *, size_t);
struct grid_line *grid_get_line(struct grid *, u_int);
void   grid_adjust_lines(struct grid *, u_int);
void   grid_clear(struct grid *, u_int, u_int, u_int, u_int, u_int);
void   grid_clear_lines(struct grid *, u_int, u_int, u_int);
void   grid_move_lines(struct grid *, u_int, u_int, u_int, u_int);
void   grid_move_cells(struct grid *, u_int, u_int, u_int, u_int, u_int);
char  *grid_string_cells(struct grid *, u_int, u_int, u_int,
       struct grid_cell **, int, struct screen *);
void   grid_duplicate_lines(struct grid *, u_int, struct grid *, u_int,
       u_int);
void   grid_reflow(struct grid *, u_int);
void   grid_wrap_position(struct grid *, u_int, u_int, u_int *, u_int *);
void   grid_unwrap_position(struct grid *, u_int *, u_int *, u_int, u_int);
u_int  grid_line_length(struct grid *, u_int);
u_int  grid_line_limit(struct grid *, u_int);
int  grid_in_set(struct grid *, u_int, u_int, const char *);

/* grid-reader.c */
void   grid_reader_start(struct grid_reader *, struct grid *, u_int, u_int);
void   grid_reader_get_cursor(struct grid_reader *, u_int *, u_int *);
u_int  grid_reader_line_length(struct grid_reader *);
int  grid_reader_in_set(struct grid_reader *, const char *);
void   grid_reader_cursor_right(struct grid_reader *, int, int, int);
void   grid_reader_cursor_left(struct grid_reader *, int);
void   grid_reader_cursor_down(struct grid_reader *);
void   grid_reader_cursor_up(struct grid_reader *);
void   grid_reader_cursor_start_of_line(struct grid_reader *, int);
void   grid_reader_cursor_end_of_line(struct grid_reader *, int, int);
void   grid_reader_cursor_next_word(struct grid_reader *, const char *);
void   grid_reader_cursor_next_word_end(struct grid_reader *, const char *);
void   grid_reader_cursor_previous_word(struct grid_reader *, const char *,
       int, int);
int  grid_reader_cursor_jump(struct grid_reader *,
       const struct utf8_data *);
int  grid_reader_cursor_jump_back(struct grid_reader *,
       const struct utf8_data *);
void   grid_reader_cursor_back_to_indentation(struct grid_reader *);

/* grid-view.c */
void   grid_view_get_cell(struct grid *, u_int, u_int, struct grid_cell *);
void   grid_view_set_cell(struct grid *, u_int, u_int,
       const struct grid_cell *);
void   grid_view_set_padding(struct grid *, u_int, u_int, int);
void   grid_view_set_cells(struct grid *, u_int, u_int,
       const struct grid_cell *, const char *, size_t);
void   grid_view_clear_history(struct grid *, u_int);
void   grid_view_clear(struct grid *, u_int, u_int, u_int, u_int, u_int);
void   grid_view_scroll_region_up(struct grid *, u_int, u_int, u_int);
void   grid_view_scroll_region_down(struct grid *, u_int, u_int, u_int);
void   grid_view_insert_lines(struct grid *, u_int, u_int, u_int);
void   grid_view_insert_lines_region(struct grid *, u_int, u_int, u_int,
       u_int);
void   grid_view_delete_lines(struct grid *, u_int, u_int, u_int);
void   grid_view_delete_lines_region(struct grid *, u_int, u_int, u_int,
       u_int);
void   grid_view_insert_cells(struct grid *, u_int, u_int, u_int, u_int);
void   grid_view_delete_cells(struct grid *, u_int, u_int, u_int, u_int);
char  *grid_view_string_cells(struct grid *, u_int, u_int, u_int);

/* screen-write.c */
void   screen_write_make_list(struct screen *);
void   screen_write_free_list(struct screen *);
void   screen_write_start_pane(struct screen_write_ctx *,
       struct window_pane *, struct screen *);
void   screen_write_start(struct screen_write_ctx *, struct screen *);
void   screen_write_start_callback(struct screen_write_ctx *, struct screen *,
       screen_write_init_ctx_cb, void *);
void   screen_write_stop(struct screen_write_ctx *);
void   screen_write_reset(struct screen_write_ctx *);
size_t printflike(1, 2) screen_write_strlen(const char *, ...);
int printflike(7, 8) screen_write_text(struct screen_write_ctx *, u_int, u_int,
       u_int, int, const struct grid_cell *, const char *, ...);
void printflike(3, 4) screen_write_puts(struct screen_write_ctx *,
       const struct grid_cell *, const char *, ...);
void printflike(4, 5) screen_write_nputs(struct screen_write_ctx *,
       ssize_t, const struct grid_cell *, const char *, ...);
void printflike(4, 0) screen_write_vnputs(struct screen_write_ctx *, ssize_t,
       const struct grid_cell *, const char *, va_list);
void   screen_write_putc(struct screen_write_ctx *, const struct grid_cell *,
       u_char);
void   screen_write_fast_copy(struct screen_write_ctx *, struct screen *,
       u_int, u_int, u_int, u_int);
void   screen_write_hline(struct screen_write_ctx *, u_int, int, int,
       enum box_lines, const struct grid_cell *);
void   screen_write_vline(struct screen_write_ctx *, u_int, int, int,
       const struct grid_cell *);
void   screen_write_menu(struct screen_write_ctx *, struct menu *, int,
       enum box_lines, const struct grid_cell *, const struct grid_cell *,
       const struct grid_cell *);
void   screen_write_box(struct screen_write_ctx *, u_int, u_int,
             enum box_lines, const struct grid_cell *, const char *);
void   screen_write_preview(struct screen_write_ctx *, struct screen *, u_int,
       u_int);
void   screen_write_backspace(struct screen_write_ctx *);
void   screen_write_mode_set(struct screen_write_ctx *, int);
void   screen_write_mode_clear(struct screen_write_ctx *, int);
void   screen_write_start_sync(struct window_pane *);
void   screen_write_stop_sync(struct window_pane *);
void   screen_write_end_sync(struct screen_write_ctx *);
void   screen_write_clear_dirty(struct window_pane *);
void   screen_write_cursorup(struct screen_write_ctx *, u_int);
void   screen_write_cursordown(struct screen_write_ctx *, u_int);
void   screen_write_cursorright(struct screen_write_ctx *, u_int);
void   screen_write_cursorleft(struct screen_write_ctx *, u_int);
void   screen_write_alignmenttest(struct screen_write_ctx *);
void   screen_write_insertcharacter(struct screen_write_ctx *, u_int, u_int);
void   screen_write_deletecharacter(struct screen_write_ctx *, u_int, u_int);
void   screen_write_clearcharacter(struct screen_write_ctx *, u_int, u_int);
void   screen_write_insertline(struct screen_write_ctx *, u_int, u_int);
void   screen_write_deleteline(struct screen_write_ctx *, u_int, u_int);
void   screen_write_clearline(struct screen_write_ctx *, u_int);
void   screen_write_clearendofline(struct screen_write_ctx *, u_int);
void   screen_write_clearstartofline(struct screen_write_ctx *, u_int);
void   screen_write_cursormove(struct screen_write_ctx *, int, int, int);
void   screen_write_reverseindex(struct screen_write_ctx *, u_int);
void   screen_write_scrollregion(struct screen_write_ctx *, u_int, u_int);
void   screen_write_linefeed(struct screen_write_ctx *, int, u_int);
void   screen_write_scrollup(struct screen_write_ctx *, u_int, u_int);
void   screen_write_scrolldown(struct screen_write_ctx *, u_int, u_int);
void   screen_write_carriagereturn(struct screen_write_ctx *);
void   screen_write_clearendofscreen(struct screen_write_ctx *, u_int);
void   screen_write_clearstartofscreen(struct screen_write_ctx *, u_int);
void   screen_write_clearscreen(struct screen_write_ctx *, u_int);
void   screen_write_clearhistory(struct screen_write_ctx *);
void   screen_write_fullredraw(struct screen_write_ctx *);
void   screen_write_collect_end(struct screen_write_ctx *);
void   screen_write_collect_add(struct screen_write_ctx *,
       const struct grid_cell *);
void   screen_write_cell(struct screen_write_ctx *, const struct grid_cell *);
void   screen_write_setselection(struct screen_write_ctx *, const char *,
       u_char *, u_int);
void   screen_write_rawstring(struct screen_write_ctx *, u_char *, u_int,
       int);
#ifdef ENABLE_SIXEL
void   screen_write_sixelimage(struct screen_write_ctx *,
       struct sixel_image *, u_int);
#endif
void   screen_write_alternateon(struct screen_write_ctx *,
       struct grid_cell *, int);
void   screen_write_alternateoff(struct screen_write_ctx *,
       struct grid_cell *, int);

/* screen-redraw.c */
void   redraw_screen(struct client *);
void   redraw_pane(struct client *, struct window_pane *);
void   redraw_pane_scrollbar(struct client *, struct window_pane *);
void   redraw_free_scene(struct redraw_scene *);
void   redraw_invalidate_scene(struct window *);
void   redraw_invalidate_all_scenes(void);
int  redraw_get_status_border_cell_type(struct redraw_span **, u_int);

/* screen.c */
void   screen_init(struct screen *, u_int, u_int, u_int);
void   screen_reinit(struct screen *, int);
void   screen_free(struct screen *);
void   screen_reset_tabs(struct screen *);
void   screen_reset_hyperlinks(struct screen *);
void   screen_set_default_cursor(struct screen *, struct options *);
void   screen_set_cursor_style(u_int, enum screen_cursor_style *, int *);
void   screen_set_cursor_colour(struct screen *, int);
int  screen_set_title(struct screen *, const char *, int);
int  screen_set_path(struct screen *, const char *, int);
void   screen_push_title(struct screen *);
void   screen_pop_title(struct screen *);
void   screen_set_progress_bar(struct screen *, enum progress_bar_state, int);
void   screen_resize(struct screen *, u_int, u_int, int);
void   screen_resize_cursor(struct screen *, u_int, u_int, int, int, int);
void   screen_set_selection(struct screen *, u_int, u_int, u_int, u_int,
       u_int, u_int, int, struct grid_cell *);
void   screen_clear_selection(struct screen *);
void   screen_hide_selection(struct screen *);
int  screen_check_selection(struct screen *, u_int, u_int);
int  screen_select_cell(struct screen *, struct grid_cell *,
       const struct grid_cell *);
int  screen_alternate_on(struct screen *, struct grid_cell *, int);
int  screen_alternate_off(struct screen *, struct grid_cell *, int);
const char *screen_mode_to_string(int);
const char *screen_print(struct screen *, int);

/* window.c */
extern struct windows windows;
extern struct window_pane_tree all_window_panes;
int    window_cmp(struct window *, struct window *);
RB_PROTOTYPE(windows, window, entry, window_cmp);
int    winlink_cmp(struct winlink *, struct winlink *);
RB_PROTOTYPE(winlinks, winlink, entry, winlink_cmp);
int    window_pane_cmp(struct window_pane *, struct window_pane *);
RB_PROTOTYPE(window_pane_tree, window_pane, tree_entry, window_pane_cmp);
struct winlink  *winlink_find_by_index(struct winlinks *, int);
struct winlink  *winlink_find_by_window(struct winlinks *, struct window *);
struct winlink  *winlink_find_by_window_id(struct winlinks *, u_int);
u_int    winlink_count(struct winlinks *);
struct winlink  *winlink_add(struct winlinks *, int);
void     winlink_set_window(struct winlink *, struct window *);
void     winlink_remove(struct winlinks *, struct winlink *);
struct winlink  *winlink_next(struct winlink *);
struct winlink  *winlink_previous(struct winlink *);
struct winlink  *winlink_next_by_number(struct winlink *, struct session *,
         int);
struct winlink  *winlink_previous_by_number(struct winlink *, struct session *,
         int);
void     winlink_stack_push(struct winlink_stack *, struct winlink *);
void     winlink_stack_remove(struct winlink_stack *, struct winlink *);
struct window *window_find_by_id_str(const char *);
struct window *window_find_by_id(u_int);
void     window_update_activity(struct window *);
struct window *window_create(u_int, u_int, u_int, u_int);
void     window_pane_set_event(struct window_pane *);
void     window_pane_wait_finish(struct window_pane *);
struct window_pane *window_get_active_at(struct window *, u_int, u_int);
struct window_pane *window_find_string(struct window *, const char *);
int    window_has_floating_panes(struct window *);
int    window_has_pane(struct window *, struct window_pane *);
int    window_pane_contains(struct window_pane *, u_int, u_int);
int    window_set_active_pane(struct window *, struct window_pane *,
         int);
void     window_fire_pane_moved(struct window_pane *, struct window *,
         int, struct window *, int);
void     window_update_focus(struct window *);
void     window_pane_update_focus(struct window_pane *);
void     window_redraw_active_switch(struct window *,
         struct window_pane *);
struct window_pane *window_add_pane(struct window *, struct window_pane *,
         u_int, int);
void     window_resize(struct window *, u_int, u_int, int, int);
void     window_pane_send_resize(struct window_pane *, u_int, u_int);
int    window_zoom(struct window_pane *);
int    window_unzoom(struct window *, int);
int    window_active_pane_is_over_zoom(struct window *);
struct window_pane *window_zoomed_pane(struct window *);
int    window_push_zoom(struct window *, int, int);
int    window_pop_zoom(struct window *);
void     window_lost_pane(struct window *, struct window_pane *);
void     window_remove_pane(struct window *, struct window_pane *);
struct window_pane *window_pane_at_index(struct window *, u_int);
struct window_pane *window_pane_next_by_number(struct window *,
      struct window_pane *, u_int);
struct window_pane *window_pane_previous_by_number(struct window *,
      struct window_pane *, u_int);
int    window_pane_index(struct window_pane *, u_int *);
int    window_pane_zindex(struct window_pane *, u_int *);
u_int    window_count_panes(struct window *, int);
void     window_destroy_panes(struct window *);
struct window_pane *window_pane_find_by_id_str(const char *);
struct window_pane *window_pane_find_by_id(u_int);
int    window_pane_destroy_ready(struct window_pane *);
void     window_pane_resize(struct window_pane *, u_int, u_int);
void     window_pane_clear_resizes(struct window_pane *,
         struct window_pane_resize *);
int    window_pane_set_mode(struct window_pane *,
         struct window_pane *, const struct window_mode *,
         struct cmdq_item *, struct cmd_find_state *, struct args *);
void     window_pane_reset_mode(struct window_pane *);
void     window_pane_reset_mode_all(struct window_pane *);
int    window_pane_key(struct window_pane *, struct client *,
         struct session *, struct winlink *, key_code,
         struct mouse_event *);
void     window_pane_paste(struct window_pane *, key_code, char *,
         size_t);
void     window_pane_set_prompt(struct window_pane *, struct client *,
         struct cmd_find_state *, const char *, const char *,
         status_prompt_input_cb, prompt_free_cb, void *, int,
         enum prompt_type);
void     window_pane_clear_prompt(struct window_pane *);
int    window_pane_has_prompt(struct window_pane *);
void     window_pane_update_prompt(struct window_pane *, const char *,
         const char *);
enum prompt_key_result window_pane_prompt_key(struct window_pane *,
         struct client *, key_code, struct mouse_event *);
int    window_pane_is_visible(struct window_pane *);
int    window_pane_exited(struct window_pane *);
u_int    window_pane_search(struct window_pane *, const char *, int,
         int);
const char  *window_printable_flags(struct winlink *, int);
const char      *window_pane_printable_flags(struct window_pane *);
struct window_pane *window_pane_find_up(struct window_pane *);
struct window_pane *window_pane_find_down(struct window_pane *);
struct window_pane *window_pane_find_left(struct window_pane *);
struct window_pane *window_pane_find_right(struct window_pane *);
void     window_pane_stack_push(struct window_panes *,
         struct window_pane *);
void     window_pane_stack_remove(struct window_panes *,
         struct window_pane *);
void     window_set_name(struct window *, const char *, int);
void     window_add_ref(struct window *, const char *);
void     window_remove_ref(struct window *, const char *);
void     window_pane_add_ref(struct window_pane *, const char *);
void     window_pane_remove_ref(struct window_pane *, const char *);
void     winlink_clear_flags(struct winlink *);
int    winlink_shuffle_up(struct session *, struct winlink *, int);
int    window_pane_start_input(struct window_pane *,
         struct cmdq_item *, char **);
void    *window_pane_get_new_data(struct window_pane *,
         struct window_pane_offset *, size_t *);
void     window_pane_update_used_data(struct window_pane *,
         struct window_pane_offset *, size_t);
void     window_pane_default_cursor(struct window_pane *);
int    window_pane_mode(struct window_pane *);
int    window_pane_show_scrollbar(struct window_pane *);
int    window_pane_scrollbar_reserve(struct window_pane *);
int    window_pane_scrollbar_visible(struct window_pane *);
int    window_pane_scrollbar_overlay(struct window_pane *);
int    window_pane_scrollbar_overlay_visible(struct window_pane *);
void     window_pane_scrollbar_show(struct window_pane *, int);
void     window_pane_scrollbar_hide(struct window_pane *);
void     window_pane_scrollbar_start_timer(struct window_pane *);
void     window_pane_scrollbar_redraw(struct window_pane *);
int    window_pane_get_bg(struct window_pane *);
int    window_pane_get_fg(struct window_pane *);
int    window_pane_get_fg_control_client(struct window_pane *);
int    window_pane_get_bg_control_client(struct window_pane *);
int    window_get_bg_client(struct window_pane *);
enum client_theme window_pane_get_theme(struct window_pane *);
void     window_pane_send_theme_update(struct window_pane *);
enum pane_lines  window_pane_get_pane_lines(struct window_pane *);
enum pane_lines  window_get_pane_lines(struct window *);
int    window_get_pane_status(struct window *);
int    window_pane_get_pane_status(struct window_pane *);
struct style_range *window_pane_status_get_range(struct window_pane *, u_int,
         u_int);
int    window_pane_is_floating(struct window_pane *);

/* window-border.c */
void     window_set_fill_cells(struct window *);
void     window_get_border_cell(struct window_pane *, enum pane_lines,
         int, struct grid_cell *);
void     window_get_fill_cell(struct window *, int, struct grid_cell *);
void     window_pane_get_border_cell(struct window_pane *, int,
         struct grid_cell *);
void     window_pane_get_border_style(struct window_pane *,
         struct client *, struct grid_cell *);
int    window_make_pane_status(struct window_pane *, struct client *,
         u_int, struct redraw_span *);

/* window-visible.c */
int    window_position_is_visible(struct visible_ranges *, u_int);
struct visible_ranges *window_visible_ranges(struct window_pane *, int, int,
         u_int, struct visible_ranges *);

/* layout.c */
u_int    layout_count_cells(struct layout_cell *);
struct layout_cell *layout_create_cell(struct layout_cell *);
void     layout_free_cell(struct layout_cell *, int);
void     layout_print_cell(struct layout_cell *, const char *, u_int);
void     layout_destroy_cell(struct window *, struct layout_cell *,
         struct layout_cell **);
void     layout_resize_layout(struct window *, struct layout_cell *,
         enum layout_type, int, int);
struct layout_cell *layout_search_by_border(struct layout_cell *, u_int, u_int);
void     layout_set_size(struct layout_cell *, u_int, u_int, int, int);
void     layout_make_leaf(struct layout_cell *, struct window_pane *);
void     layout_make_node(struct layout_cell *, enum layout_type);
void     layout_fix_zindexes(struct window *, struct layout_cell *);
int    layout_cell_is_tiled(struct layout_cell *);
int    layout_add_horizontal_border(struct layout_cell *,
         struct layout_cell *, int);
void     layout_fix_offsets(struct window *);
void     layout_fix_panes(struct window *, struct window_pane *);
void     layout_resize_adjust(struct window *, struct layout_cell *,
         enum layout_type, int);
void     layout_resize_set_size(struct window *, struct layout_cell *,
         enum layout_type, u_int);
struct layout_cell *layout_cell_get_neighbour(struct layout_cell *);
void     layout_init(struct window *, struct window_pane *);
void     layout_free(struct window *, int);
void     layout_resize(struct window *, u_int, u_int);
void     layout_resize_pane(struct window_pane *, enum layout_type,
         int, int);
void     layout_resize_pane_to(struct window_pane *, enum layout_type,
         u_int);
int    layout_resize_floating_pane(struct window_pane *,
         enum layout_type, int, int, char **);
int    layout_resize_floating_pane_to(struct window_pane *,
         enum layout_type, u_int, char **);
void     layout_assign_pane(struct layout_cell *, struct window_pane *,
         int);
int    layout_split_check_space(struct window_pane *,
         struct layout_cell *, enum layout_type);
void     layout_split_sizes(struct layout_cell *, int, int,
         enum layout_type, u_int *, u_int *, u_int *);
struct layout_cell *layout_replace_with_node(struct window *,
         struct layout_cell *, enum layout_type);
struct layout_cell *layout_split_pane(struct window_pane *, enum layout_type,
         int, int);
struct layout_cell *layout_floating_pane(struct window *, struct window_pane *,
         struct layout_geometry *);
void     layout_close_pane(struct window_pane *);
int    layout_spread_cell(struct window *, struct layout_cell *);
void     layout_spread_out(struct window_pane *);
struct layout_cell *layout_get_tiled_cell(struct cmdq_item *, struct args *,
         struct window *, struct window_pane *, int, char **);
struct layout_cell *layout_get_floating_cell(struct cmdq_item *, struct args *,
         enum pane_lines, struct window *, struct window_pane *,
         int, char **);
int    layout_floating_args_parse(struct cmdq_item *, struct args *,
         enum pane_lines, struct window *, struct layout_geometry *,
         char **);
int    layout_split_floating_cell(struct layout_cell *,
         struct window *, struct layout_geometry *, enum pane_lines,
         int, char **);
int    layout_remove_tile(struct window *, struct layout_cell *);
int    layout_insert_tile(struct window *, struct layout_cell *);

/* layout-custom.c */
char    *layout_dump(struct window *, struct layout_cell *);
int    layout_parse(struct window *, const char *, char **);

/* layout-set.c */
int    layout_set_lookup(const char *);
u_int    layout_set_select(struct window *, u_int);
u_int    layout_set_next(struct window *);
u_int    layout_set_previous(struct window *);

/* mode-tree.c */
typedef void (*mode_tree_build_cb)(void *, struct sort_criteria *,
           uint64_t *, const char *);
typedef void (*mode_tree_draw_cb)(void *, void *, struct screen_write_ctx *,
       u_int, u_int);
typedef int (*mode_tree_search_cb)(void *, void *, const char *, int);
typedef void (*mode_tree_menu_cb)(void *, struct client *, key_code);
typedef u_int (*mode_tree_height_cb)(void *, u_int);
typedef key_code (*mode_tree_key_cb)(void *, void *, u_int);
typedef int (*mode_tree_swap_cb)(void *, void *, struct sort_criteria *);
typedef void (*mode_tree_sort_cb)(struct sort_criteria *);
typedef void (*mode_tree_each_cb)(void *, void *, struct client *, key_code);
typedef const char** (*mode_tree_help_cb)(u_int *, const char**);
u_int  mode_tree_count_tagged(struct mode_tree_data *);
void  *mode_tree_get_current(struct mode_tree_data *);
const char *mode_tree_get_current_name(struct mode_tree_data *);
void   mode_tree_select_top(struct mode_tree_data *);
void   mode_tree_expand_current(struct mode_tree_data *);
void   mode_tree_collapse_current(struct mode_tree_data *);
void   mode_tree_expand(struct mode_tree_data *, uint64_t);
int  mode_tree_set_current(struct mode_tree_data *, uint64_t);
void   mode_tree_each_tagged(struct mode_tree_data *, mode_tree_each_cb,
       struct client *, key_code, int);
void   mode_tree_up(struct mode_tree_data *, int);
int  mode_tree_down(struct mode_tree_data *, int);
struct mode_tree_data *mode_tree_start(struct window_pane *, struct args *,
       mode_tree_build_cb, mode_tree_draw_cb, mode_tree_search_cb,
       mode_tree_menu_cb, mode_tree_height_cb, mode_tree_key_cb,
             mode_tree_swap_cb, mode_tree_sort_cb, mode_tree_help_cb, void *,
       const struct menu_item *, struct screen **);
void   mode_tree_zoom(struct mode_tree_data *, struct args *);
void   mode_tree_build(struct mode_tree_data *);
void   mode_tree_free(struct mode_tree_data *);
void   mode_tree_resize(struct mode_tree_data *, u_int, u_int);
struct mode_tree_item *mode_tree_add(struct mode_tree_data *,
       struct mode_tree_item *, void *, uint64_t, const char *,
       const char *, int);
void   mode_tree_view_name(struct mode_tree_data *, const char *);
void   mode_tree_draw_as_parent(struct mode_tree_item *);
void   mode_tree_no_tag(struct mode_tree_item *);
void   mode_tree_align(struct mode_tree_item *, int);
void   mode_tree_remove(struct mode_tree_data *, struct mode_tree_item *);
void   mode_tree_draw(struct mode_tree_data *);
int  mode_tree_key(struct mode_tree_data *, struct client *, key_code *,
       struct mouse_event *, u_int *, u_int *);
void   mode_tree_set_prompt(struct mode_tree_data *, struct client *,
       const char *, const char *, enum prompt_type, int,
       mode_tree_prompt_input_cb, prompt_free_cb, void *);
void   mode_tree_clear_prompt(struct mode_tree_data *);
int  mode_tree_has_prompt(struct mode_tree_data *);
void   mode_tree_run_command(struct client *, struct cmd_find_state *,
       const char *, const char *);

/* window-buffer.c */
extern const struct window_mode window_buffer_mode;

/* window-tree.c */
extern const struct window_mode window_tree_mode;

/* window-switch.c */
extern const struct window_mode window_switch_mode;

/* window-clock.c */
extern const struct window_mode window_clock_mode;
extern const char window_clock_table[14][5][5];

/* window-panes.c */
extern const struct window_mode window_panes_mode;

/* window-client.c */
extern const struct window_mode window_client_mode;

/* window-copy.c */
extern const struct window_mode window_copy_mode;
extern const struct window_mode window_view_mode;
void printflike(3, 4) window_copy_add(struct window_pane *, int, const char *,
         ...);
void printflike(3, 0) window_copy_vadd(struct window_pane *, int, const char *,
         va_list);
void     window_copy_scroll(struct window_pane *, int, u_int, u_int, int);
void     window_copy_pageup(struct window_pane *, int);
void     window_copy_pagedown(struct window_pane *, int, int);
void     window_copy_start_drag(struct client *, struct mouse_event *);
char    *window_copy_get_word(struct window_pane *, u_int, u_int);
char    *window_copy_get_line(struct window_pane *, u_int);
int    window_copy_get_current_offset(struct window_pane *, u_int *,
         u_int *);
char    *window_copy_get_hyperlink(struct window_pane *, u_int, u_int);
void     window_copy_set_line_numbers(struct window_pane *, int);

/* window-customize.c */
extern const struct window_mode window_customize_mode;

/* names.c */
void   check_window_name(struct window *);
char  *default_window_name(struct window *);
char  *parse_window_name(const char *);

/* monitor.c */
struct monitor_set *monitor_create_client(struct client *, monitor_cb, void *);
struct monitor_set *monitor_create_session(struct session *, monitor_cb, void *);
void  monitor_destroy(struct monitor_set *);
int monitor_parse(const char *, char **, enum monitor_type *, int *,
      char **);
void  monitor_add(struct monitor_set *, const char *, enum monitor_type, int,
      const char *, int);
void  monitor_remove(struct monitor_set *, const char *);
u_int monitor_get_fire_count(struct monitor_set *, const char *);
time_t  monitor_get_fire_time(struct monitor_set *, const char *);

/* control.c */
void  control_discard(struct client *);
void  control_discard_all(struct client *);
void  control_start(struct client *);
void  control_ready(struct client *);
void  control_stop(struct client *);
void  control_wait_exit(int);
void  control_set_pane_on(struct client *, struct window_pane *);
void  control_set_pane_off(struct client *, struct window_pane *);
void  control_continue_pane(struct client *, struct window_pane *);
void  control_pause_pane(struct client *, struct window_pane *);
void  control_reset_pane(struct client *, struct window_pane *);
void  control_set_window_size(struct client *, u_int, u_int, u_int);
int control_get_window_size(struct client *, u_int, u_int *, u_int *);
void  control_clear_window_size(struct client *, u_int);
struct window_pane_offset *control_pane_offset(struct client *,
     struct window_pane *, int *);
void  control_reset_offsets(struct client *);
void printflike(2, 3) control_write(struct client *, const char *, ...);
void printflike(2, 3) control_notify_write(struct client *, const char *, ...);
void  control_write_guard(struct client *, const char *, long, u_int, int);
void  control_write_output(struct client *, struct window_pane *);
int control_all_done(struct client *);
void  control_add_sub(struct client *, const char *, enum monitor_type, int,
      const char *);
void  control_remove_sub(struct client *, const char *);

/* control-notify.c */
void  control_build_events(void);

/* session.c */
extern struct sessions sessions;
extern struct session_groups session_groups;
extern u_int next_session_id;
int session_cmp(struct session *, struct session *);
RB_PROTOTYPE(sessions, session, entry, session_cmp);
int session_group_cmp(struct session_group *, struct session_group *s2);
RB_PROTOTYPE(session_groups, session_group, entry, session_group_cmp);
int    session_alive(struct session *);
struct session  *session_find(const char *);
struct session  *session_find_by_id_str(const char *);
struct session  *session_find_by_id(u_int);
struct session  *session_create(const char *, const char *, const char *,
         struct environ *, struct options *, struct termios *);
void     session_destroy(struct session *, int,  const char *);
void     session_add_ref(struct session *, const char *);
void     session_remove_ref(struct session *, const char *);
void     session_update_activity(struct session *, struct timeval *);
struct session  *session_next_session(struct session *, struct sort_criteria *);
struct session  *session_previous_session(struct session *,
         struct sort_criteria *);
struct winlink  *session_attach(struct session *, struct window *, int,
         char **);
int    session_detach(struct session *, struct winlink *);
int    session_has(struct session *, struct window *);
int    session_is_linked(struct session *, struct window *);
int    session_next(struct session *, int);
int    session_previous(struct session *, int);
int    session_select(struct session *, int);
int    session_last(struct session *);
int    session_set_current(struct session *, struct winlink *);
struct session_group *session_group_contains(struct session *);
struct session_group *session_group_find(const char *);
struct session_group *session_group_new(const char *);
void     session_group_add(struct session_group *, struct session *);
void     session_group_synchronize_to(struct session *);
void     session_group_synchronize_from(struct session *);
u_int    session_group_count(struct session_group *);
u_int    session_group_attached_count(struct session_group *);
void     session_renumber_windows(struct session *);
void     session_theme_changed(struct session *);
void     session_update_history(struct session *);

/* utf8.c */
enum utf8_state  utf8_towc (const struct utf8_data *, wchar_t *);
enum utf8_state  utf8_fromwc(wchar_t wc, struct utf8_data *);
void     utf8_update_width_cache(void);
utf8_char  utf8_build_one(u_char);
enum utf8_state  utf8_from_data(const struct utf8_data *, utf8_char *);
void     utf8_to_data(utf8_char, struct utf8_data *);
void     utf8_set(struct utf8_data *, u_char);
void     utf8_copy(struct utf8_data *, const struct utf8_data *);
enum utf8_state  utf8_open(struct utf8_data *, u_char);
enum utf8_state  utf8_append(struct utf8_data *, u_char);
int    utf8_isvalid(const char *);
size_t     utf8_strvis(char *, const char *, size_t, int);
size_t     utf8_stravis(char **, const char *, int);
size_t     utf8_stravisx(char **, const char *, size_t, int);
char    *utf8_sanitize(const char *);
size_t     utf8_strlen(const struct utf8_data *);
u_int    utf8_strwidth(const struct utf8_data *, ssize_t);
struct utf8_data *utf8_fromcstr(const char *);
char    *utf8_tocstr(struct utf8_data *);
u_int    utf8_cstrwidth(const char *);
char    *utf8_padcstr(const char *, u_int);
char    *utf8_rpadcstr(const char *, u_int);
int    utf8_cstrhas(const char *, const struct utf8_data *);

/* osdep-*.c */
char    *osdep_get_name(int, char *);
char    *osdep_get_cwd(int);
struct event_base *osdep_event_init(void);

/* utf8-combined.c */
int    utf8_has_zwj(const struct utf8_data *);
int    utf8_is_zwj(const struct utf8_data *);
int    utf8_is_vs(const struct utf8_data *);
int    utf8_is_hangul_filler(const struct utf8_data *);
int    utf8_should_combine(const struct utf8_data *,
        const struct utf8_data *);
enum hanguljamo_state hanguljamo_check_state(const struct utf8_data *,
        const struct utf8_data *);

/* log.c */
void  log_add_level(void);
int log_get_level(void);
void  log_open(const char *);
void  log_toggle(const char *);
void  log_close(void);
void printflike(1, 2) log_debug(const char *, ...);
__dead void printflike(1, 2) fatal(const char *, ...);
__dead void printflike(1, 2) fatalx(const char *, ...);

/* menu.c */
#define MENU_NOMOUSE 0x1
#define MENU_TAB 0x2
#define MENU_STAYOPEN 0x4
struct menu *menu_create(const char *);
void     menu_add_items(struct menu *, const struct menu_item *,
        struct cmdq_item *, struct client *,
        struct cmd_find_state *);
void     menu_add_item(struct menu *, const struct menu_item *,
        struct cmdq_item *, struct client *,
        struct cmd_find_state *);
void     menu_free(struct menu *);
int    menu_display(struct menu *, int, int, struct cmdq_item *,
        u_int, u_int, struct client *, enum box_lines, const char *,
        const char *, const char *, struct cmd_find_state *,
        menu_choice_cb, void *);
void     menu_close(struct window *);
void     menu_destroy(struct window *);
void     menu_update(struct menu_data *);
struct screen *menu_screen(struct menu_data *);
u_int    menu_width(struct menu_data *);
u_int    menu_height(struct menu_data *);
u_int    menu_x(struct menu_data *);
u_int    menu_y(struct menu_data *);
void     menu_get_cursor(struct menu_data *, u_int *, u_int *);
void     menu_resize(struct menu_data *, struct window *);
int    menu_key(struct client *, struct menu_data *, struct key_event *);

/* popup.c */
#define POPUP_CLOSEEXIT 0x1
#define POPUP_CLOSEEXITZERO 0x2
#define POPUP_CLOSEANYKEY 0x4
typedef void (*popup_close_cb)(int, void *);
int    popup_display(int, enum box_lines, struct cmdq_item *, u_int,
                    u_int, u_int, u_int, struct environ *, const char *, int,
                    char **, const char *, const char *, struct client *,
                    struct session *, const char *, const char *,
                    popup_close_cb, void *);
int    popup_present(struct client *);
int    popup_modify(struct client *, const char *, const char *,
        const char *, enum box_lines, int);

/* style.c */
int    style_parse(struct style *,const struct grid_cell *,
         const char *);
int    style_parse_colour(struct style *,
         const struct grid_cell *, const char *);
const char  *style_tostring(struct style *);
const char  *style_link(struct style *);
struct style  *style_add(struct grid_cell *, struct options *,
         const char *, struct format_tree *);
void     style_apply(struct grid_cell *, struct options *,
         const char *, struct format_tree *);
void     style_set(struct style *, const struct grid_cell *);
void     style_copy(struct style *, struct style *);
void     style_set_scrollbar_style_from_option(struct style *,
         struct options *);
void     style_ranges_init(struct style_ranges *);
void     style_ranges_free(struct style_ranges *);
struct style_range *style_ranges_get_range(struct style_ranges *, u_int);

/* spawn.c */
struct winlink  *spawn_window(struct spawn_context *, char **);
struct window_pane *spawn_pane(struct spawn_context *, char **);
typedef void (*spawn_finish_edit_cb)(char *, size_t, void *);
struct spawn_editor_state *spawn_editor(struct client *, const char *, size_t,
         spawn_finish_edit_cb, void *);
void     spawn_cancel_editor(struct spawn_editor_state *);
pid_t    spawn_get_editor_pid(struct spawn_editor_state *);
void     spawn_editor_finish(struct window_pane *);

/* regsub.c */
char    *regsub(const char *, const char *, const char *, int);

#ifdef ENABLE_SIXEL
/* image.c */
int    image_free_all(struct screen *);
struct image  *image_store(struct screen *, struct sixel_image *);
int    image_check_line(struct screen *, u_int, u_int);
int    image_check_area(struct screen *, u_int, u_int, u_int, u_int);
int    image_scroll_up(struct screen *, u_int);

/* image-sixel.c */
#define SIXEL_COLOUR_REGISTERS 1024
struct sixel_image *sixel_parse(const char *, size_t, u_int, u_int, u_int);
void     sixel_free(struct sixel_image *);
void     sixel_log(struct sixel_image *);
void     sixel_size_in_cells(struct sixel_image *, u_int *, u_int *);
struct sixel_image *sixel_scale(struct sixel_image *, u_int, u_int, u_int,
         u_int, u_int, u_int, int);
char    *sixel_print(struct sixel_image *, struct sixel_image *,
         size_t *);
struct screen *sixel_to_screen(struct sixel_image *);
#endif

/* server-acl.c */
#define SERVER_ACL_READONLY 0x1
#define SERVER_ACL_IS_GROUP 0x2
void       server_acl_init(void);
int      server_acl_find(id_t, int);
void       server_acl_display(struct cmdq_item *);
void       server_acl_allow(id_t, int);
void       server_acl_deny(id_t, int);
void       server_acl_allow_write(id_t, int);
void       server_acl_deny_write(id_t, int);
int      server_acl_join(struct client *);

/* hyperlink.c */
u_int      hyperlinks_put(struct hyperlinks *, const char *,
           const char *);
int      hyperlinks_get(struct hyperlinks *, u_int,
           const char **, const char **, const char **);
struct hyperlinks *hyperlinks_init(void);
struct hyperlinks *hyperlinks_copy(struct hyperlinks *);
void       hyperlinks_reset(struct hyperlinks *);
void       hyperlinks_free(struct hyperlinks *);

#endif /* TMUX_H */

Coverage Report

Created: 2026-08-31 06:26