root/usr.bin/tmux/tmux.h
/* $OpenBSD: tmux.h,v 1.1305 2026/04/05 15:43:17 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/queue.h>
#include <sys/tree.h>

#include <bitstring.h>
#include <event.h>
#include <limits.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <termios.h>
#include <wchar.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 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 screen_write_citem;
struct screen_write_cline;
struct screen_write_ctx;
struct session;
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

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

/* 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_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, 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 "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_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_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

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

/* 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_START_OUTPUT 0x10

/* 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 positions. */
#define CELL_INSIDE 0
#define CELL_TOPBOTTOM 1
#define CELL_LEFTRIGHT 2
#define CELL_TOPLEFT 3
#define CELL_TOPRIGHT 4
#define CELL_BOTTOMLEFT 5
#define CELL_BOTTOMRIGHT 6
#define CELL_TOPJOIN 7
#define CELL_BOTTOMJOIN 8
#define CELL_LEFTJOIN 9
#define CELL_RIGHTJOIN 10
#define CELL_JOIN 11
#define CELL_OUTSIDE 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;

/* Grid line. */
struct grid_line {
        struct grid_cell_entry  *celldata;
        u_int                    cellused;
        u_int                    cellsize;

        struct grid_extd_entry  *extddata;
        u_int                    extdsize;

        int                      flags;
        time_t                   time;
};

/* 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;

        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                     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;
};

/* 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;

        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;

        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

        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 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 redraw context. */
struct screen_redraw_ctx {
        struct client   *c;

        u_int            statuslines;
        int              statustop;

        int              pane_status;
        enum pane_lines  pane_lines;

        int              pane_scrollbars;
        int              pane_scrollbars_pos;

        struct grid_cell no_pane_gc;
        int              no_pane_gc_set;

        u_int            sx;
        u_int            sy;
        u_int            ox;
        u_int            oy;
};

/* 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;

        struct screen   *(*init)(struct window_mode_entry *,
                             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;

        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
};

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

        u_int            xoff;
        u_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_FLOATING 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

        u_int            sb_slider_y;
        u_int            sb_slider_h;

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

        pid_t            pid;
        char             tty[TTY_NAME_MAX];
        int              status;
        struct timeval   dead_time;

        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;
        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;
        size_t           status_size;

        TAILQ_HEAD(, window_mode_entry) modes;

        char            *searchstr;
        int              searchregex;

        int              border_gc_set;
        struct grid_cell border_gc;

        int              control_bg;
        int              control_fg;

        struct style     scrollbar_style;

        TAILQ_ENTRY(window_pane) entry;  /* link in list of all panes */
        TAILQ_ENTRY(window_pane) sentry; /* link in list of last visited */
        RB_ENTRY(window_pane) tree_entry;
};
TAILQ_HEAD(window_panes, 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_panes      last_panes;
        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;

        struct utf8_data        *fill_character;
        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

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

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

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

        struct layout_cell *parent;

        u_int            sx;
        u_int            sy;

        u_int            xoff;
        u_int            yoff;

        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 {
        key_code                 key;
        struct mouse_event       m;

        char                    *buf;
        size_t                   len;
};

/* 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 */
};

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

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

/* 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;
        u_int            xpixel;
        u_int            ypixel;

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

        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_ALL_REQUEST_FLAGS \
        (TTY_HAVEDA|TTY_HAVEDA2|TTY_HAVEXDA)
        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;
        int              mouse_scrolling_flag;
        int              mouse_slider_mpos;

        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                      wrapped;

        u_int                    num;
        void                    *ptr;
        void                    *ptr2;

        /*
         * Whether this command should be sent even when the pane is not
         * visible (used for a passthrough sequence when allow-passthrough is
         * "all").
         */
        int                      allow_invisible_panes;

        /*
         * 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. */
        u_int                    xoff;
        u_int                    yoff;
        u_int                    rxoff;
        u_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 colour_palette   *palette;

        /* Containing region (usually window) offset and size. */
        int                      bigger;
        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;

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

/* Prompt type. */
#define PROMPT_NTYPES 4
enum prompt_type {
        PROMPT_TYPE_COMMAND,
        PROMPT_TYPE_SEARCH,
        PROMPT_TYPE_TARGET,
        PROMPT_TYPE_WINDOW_TARGET,
        PROMPT_TYPE_INVALID = 0xff
};

/* 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);

/* Client window. */
struct client_window {
        u_int                    window;
        struct window_pane      *pane;

        u_int                    sx;
        u_int                    sy;

        RB_ENTRY(client_window)  entry;
};
RB_HEAD(client_windows, client_window);

/* Client connection. */
typedef int (*prompt_input_cb)(struct client *, void *, const char *, int);
typedef void (*prompt_free_cb)(void *);
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 *,
    struct screen_redraw_ctx *);
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 *);
struct client {
        const char              *name;
        struct tmuxpeer         *peer;
        const char              *user;
        struct cmdq_list        *queue;

        struct client_windows    windows;

        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;

        char                    *term_name;
        int                      term_features;
        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 event             repeat_timer;

        struct event             click_timer;
        int                      click_loc;
        int                      click_wp;
        u_int                    click_button;
        struct mouse_event       click_event;

        struct status_line       status;
        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_REDRAWPANES 0x20000000
#define CLIENT_NOFORK 0x40000000
#define CLIENT_ACTIVEPANE 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_REDRAWSCROLLBARS 0x4000000000ULL
#define CLIENT_NO_DETACH_ON_DESTROY 0x8000000000ULL
#define CLIENT_ALLREDRAWFLAGS           \
        (CLIENT_REDRAWWINDOW|           \
         CLIENT_REDRAWSTATUS|           \
         CLIENT_REDRAWSTATUSALWAYS|     \
         CLIENT_REDRAWBORDERS|          \
         CLIENT_REDRAWOVERLAY|          \
         CLIENT_REDRAWPANES|            \
         CLIENT_REDRAWSCROLLBARS)
#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;

        uint64_t                 redraw_panes;
        uint64_t                 redraw_scrollbars;

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

        char                    *prompt_string;
        struct format_tree      *prompt_formats;
        struct utf8_data        *prompt_buffer;
        char                    *prompt_last;
        size_t                   prompt_index;
        prompt_input_cb          prompt_inputcb;
        prompt_free_cb           prompt_freecb;
        void                    *prompt_data;
        u_int                    prompt_hindex[PROMPT_NTYPES];
        enum {
                PROMPT_ENTRY,
                PROMPT_COMMAND
        }                        prompt_mode;
        struct utf8_data        *prompt_saved;
#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
        int                      prompt_flags;
        enum prompt_type         prompt_type;
        int                      prompt_cursor;

        struct session          *session;
        struct session          *last_session;

        int                      references;

        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);

/* Control mode subscription type. */
enum control_sub_type {
        CONTROL_SUB_SESSION,
        CONTROL_SUB_PANE,
        CONTROL_SUB_ALL_PANES,
        CONTROL_SUB_WINDOW,
        CONTROL_SUB_ALL_WINDOWS
};

/* 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

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
};

/* 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_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);
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 *);

/* 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);

/* 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);

/* notify.c */
void    notify_hook(struct cmdq_item *, const char *);
void    notify_client(const char *, struct client *);
void    notify_session(const char *, struct session *);
void    notify_winlink(const char *, struct winlink *);
void    notify_session_window(const char *, struct session *, struct window *);
void    notify_window(const char *, struct window *);
void    notify_pane(const char *, struct window_pane *);
void    notify_paste_buffer(const char *, int);

/* 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 *);
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 *, u_int);
int              options_array_set(struct options_entry *, u_int, 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 *);
u_int            options_array_item_index(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 *, int, int);
char            *options_parse(const char *, int *);
struct options_entry *options_parse_get(struct options *, const char *, int *,
                     int);
char            *options_match(const char *, int *, int *);
struct options_entry *options_match_get(struct options *, const char *, int *,
                     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 *, int,
                     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.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 grid_cell *, struct colour_palette *,
            struct hyperlinks *);
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 grid_cell *, struct colour_palette *,
            struct hyperlinks *);
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_default_attributes(struct tty *, const struct grid_cell *,
            struct colour_palette *, u_int, struct hyperlinks *);
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);

/* tty-draw.c */
void    tty_draw_line(struct tty *, struct screen *, u_int, u_int, u_int,
            u_int, u_int, const struct grid_cell *, struct colour_palette *);
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_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 *);
void    tty_cmd_syncstart(struct tty *, const struct tty_ctx *);
void    tty_default_colours(struct grid_cell *, struct window_pane *);

/* 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, 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);
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_add_features(int *, const char *, const char *);
const char      *tty_get_features(int);
int              tty_apply_features(struct tty_term *, int);
void             tty_default_features(int *, 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 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 *);
void     file_write_ready(struct client_files *, struct imsg *);
void     file_read_data(struct client_files *, struct imsg *);
void     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 */
RB_PROTOTYPE(client_windows, client_window, entry, server_client_window_cmp);
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 *);
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 *);
struct client_window *server_client_get_client_window(struct client *, u_int);
struct client_window *server_client_add_client_window(struct client *, u_int);
struct window_pane *server_client_get_pane(struct client *);
void     server_client_set_pane(struct client *, struct window_pane *);
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_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_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 */
extern char     **status_prompt_hlist[];
extern u_int      status_prompt_hsize[];
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 *, prompt_input_cb, prompt_free_cb,
             void *, int, enum prompt_type);
void     status_prompt_clear(struct client *);
int      status_prompt_redraw(struct client *);
int      status_prompt_key(struct client *, key_code);
void     status_prompt_update(struct client *, const char *, const char *);
void     status_prompt_load_history(void);
void     status_prompt_save_history(void);
const char *status_prompt_type_string(u_int);
enum prompt_type status_prompt_type(const char *type);

/* 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);
const char *colour_tostring(int);
enum client_theme colour_totheme(int);
int      colour_fromstring(const char *);
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 *);

/* grid.c */
extern const struct grid_cell grid_default_cell;
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 *);
int      grid_compare(struct grid *, struct grid *);
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);
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);
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);
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);
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);
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_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);
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     screen_redraw_screen(struct client *);
void     screen_redraw_pane(struct client *, struct window_pane *, int);

/* screen.c */
void     screen_init(struct screen *, u_int, u_int, u_int);
void     screen_reinit(struct screen *);
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 *);
void     screen_set_path(struct screen *, const char *);
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, 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 *);
void     screen_alternate_on(struct screen *, struct grid_cell *, int);
void     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 *);
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_pane(struct window *, struct window_pane *);
int              window_set_active_pane(struct window *, struct window_pane *,
                     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_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 *);
u_int            window_count_panes(struct window *);
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);
int              window_pane_set_mode(struct window_pane *,
                     struct window_pane *, const struct window_mode *,
                     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);
int              window_pane_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 *);
void             window_add_ref(struct window *, const char *);
void             window_remove_ref(struct window *, 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_set_fill_character(struct window *);
void             window_pane_default_cursor(struct window_pane *);
int              window_pane_mode(struct window_pane *);
int              window_pane_show_scrollbar(struct window_pane *, int);
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 *);
struct style_range *window_pane_border_status_get_range(struct window_pane *,
                        u_int, u_int);

/* 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 *);
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, u_int,
                     u_int);
void             layout_make_leaf(struct layout_cell *, struct window_pane *);
void             layout_make_node(struct layout_cell *, enum layout_type);
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_init(struct window *, struct window_pane *);
void             layout_free(struct window *);
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);
void             layout_assign_pane(struct layout_cell *, struct window_pane *,
                     int);
struct layout_cell *layout_split_pane(struct window_pane *, enum layout_type,
                     int, int);
void             layout_close_pane(struct window_pane *);
int              layout_spread_cell(struct window *, struct layout_cell *);
void             layout_spread_out(struct window_pane *);

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

/* 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, 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);

/* window-option.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 *);

/* control.c */
void    control_discard(struct client *);
void    control_start(struct client *);
void    control_ready(struct client *);
void    control_stop(struct client *);
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 *);
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    control_write_output(struct client *, struct window_pane *);
int     control_all_done(struct client *);
void    control_add_sub(struct client *, const char *, enum control_sub_type,
           int, const char *);
void    control_remove_sub(struct client *, const char *);

/* control-notify.c */
void    control_notify_pane_mode_changed(int);
void    control_notify_window_layout_changed(struct window *);
void    control_notify_window_pane_changed(struct window *);
void    control_notify_window_unlinked(struct session *, struct window *);
void    control_notify_window_linked(struct session *, struct window *);
void    control_notify_window_renamed(struct window *);
void    control_notify_client_session_changed(struct client *);
void    control_notify_client_detached(struct client *);
void    control_notify_session_renamed(struct session *);
void    control_notify_session_created(struct session *);
void    control_notify_session_closed(struct session *);
void    control_notify_session_window_changed(struct session *);
void    control_notify_paste_buffer_changed(const char *);
void    control_notify_paste_buffer_deleted(const char *);

/* 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 *);
char            *session_check_name(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 *);

/* 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 *);

/* procname.c */
char   *get_proc_name(int, char *);
char   *get_proc_cwd(int);

/* 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 *);
struct menu_data *menu_prepare(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 *);
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 *);
struct screen   *menu_mode_cb(struct client *, void *, u_int *, u_int *);
struct visible_ranges *menu_check_cb(struct client *, void *, u_int, u_int,
                    u_int);
void             menu_draw_cb(struct client *, void *,
                    struct screen_redraw_ctx *);
void             menu_free_cb(struct client *, void *);
int              menu_key_cb(struct client *, void *, struct key_event *);

/* popup.c */
#define POPUP_CLOSEEXIT 0x1
#define POPUP_CLOSEEXITZERO 0x2
#define POPUP_INTERNAL 0x4
#define POPUP_CLOSEANYKEY 0x8
#define POPUP_NOJOB 0x10
typedef void (*popup_close_cb)(int, void *);
typedef void (*popup_finish_edit_cb)(char *, size_t, 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 *);
void             popup_write(struct client *, const char *, size_t);
int              popup_editor(struct client *, const char *, size_t,
                    popup_finish_edit_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 *);
const char      *style_tostring(struct style *);
void             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 **);

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

/* server-acl.c */
void                     server_acl_init(void);
struct server_acl_user  *server_acl_user_find(uid_t);
void                     server_acl_display(struct cmdq_item *);
void                     server_acl_user_allow(uid_t);
void                     server_acl_user_deny(uid_t);
void                     server_acl_user_allow_write(uid_t);
void                     server_acl_user_deny_write(uid_t);
int                      server_acl_join(struct client *);
uid_t                    server_acl_get_uid(struct server_acl_user *);

/* 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 */