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/* vi:set ts=8 sts=4 sw=4:
 *
 * VIM - Vi IMproved    by Bram Moolenaar
 *
 * Do ":help uganda"  in Vim to read copying and usage conditions.
 * Do ":help credits" in Vim to see a list of people who contributed.
 */

/*
 * Keycode definitions for special keys.
 *
 * Any special key code sequences are replaced by these codes.
 */

/*
 * For MSDOS some keys produce codes larger than 0xff. They are split into two
 * chars, the first one is K_NUL (same value used in term.h).
 */
#define K_NUL                   (0xce)  /* for MSDOS: special key follows */

/*
 * K_SPECIAL is the first byte of a special key code and is always followed by
 * two bytes.
 * The second byte can have any value. ASCII is used for normal termcap
 * entries, 0x80 and higher for special keys, see below.
 * The third byte is guaranteed to be between 0x02 and 0x7f.
 */

#define K_SPECIAL               (0x80)

/*
 * Positive characters are "normal" characters.
 * Negative characters are special key codes.  Only characters below -0x200
 * are used to so that the absolute value can't be mistaken for a single-byte
 * character.
 */
#define IS_SPECIAL(c)           ((c) < 0)

/*
 * Characters 0x0100 - 0x01ff have a special meaning for abbreviations.
 * Multi-byte characters also have ABBR_OFF added, thus are above 0x0200.
 */
#define ABBR_OFF                0x100

/*
 * NUL cannot be in the input string, therefore it is replaced by
 *      K_SPECIAL   KS_ZERO     KE_FILLER
 */
#define KS_ZERO                 255

/*
 * K_SPECIAL cannot be in the input string, therefore it is replaced by
 *      K_SPECIAL   KS_SPECIAL  KE_FILLER
 */
#define KS_SPECIAL              254

/*
 * KS_EXTRA is used for keys that have no termcap name
 *      K_SPECIAL   KS_EXTRA    KE_xxx
 */
#define KS_EXTRA                253

/*
 * KS_MODIFIER is used when a modifier is given for a (special) key
 *      K_SPECIAL   KS_MODIFIER bitmask
 */
#define KS_MODIFIER             252

/*
 * These are used for the GUI
 *      K_SPECIAL   KS_xxx      KE_FILLER
 */
#define KS_MOUSE                251
#define KS_MENU                 250
#define KS_VER_SCROLLBAR        249
#define KS_HOR_SCROLLBAR        248

/*
 * These are used for DEC mouse
 */
#define KS_NETTERM_MOUSE        247
#define KS_DEC_MOUSE            246

/*
 * Used for switching Select mode back on after a mapping or menu.
 */
#define KS_SELECT               245
#define K_SELECT_STRING         (char_u *)"\200\365X"

/*
 * Used for tearing off a menu.
 */
#define KS_TEAROFF              244

/* used for JSB term mouse */
#define KS_JSBTERM_MOUSE        243

/* used a termcap entry that produces a normal character */
#define KS_KEY                  242

/* Used for the qnx pterm mouse */
#define KS_PTERM_MOUSE          241

/* Used for click in a tab pages label. */
#define KS_TABLINE              240

/* Used for menu in a tab pages line. */
#define KS_TABMENU              239

/*
 * Filler used after KS_SPECIAL and others
 */
#define KE_FILLER               ('X')

/*
 * translation of three byte code "K_SPECIAL a b" into int "K_xxx" and back
 */
#define TERMCAP2KEY(a, b)       (-((a) + ((int)(b) << 8)))
#define KEY2TERMCAP0(x)         ((-(x)) & 0xff)
#define KEY2TERMCAP1(x)         (((unsigned)(-(x)) >> 8) & 0xff)

/*
 * get second or third byte when translating special key code into three bytes
 */
#define K_SECOND(c)     ((c) == K_SPECIAL ? KS_SPECIAL : (c) == NUL ? KS_ZERO : KEY2TERMCAP0(c))

#define K_THIRD(c)      (((c) == K_SPECIAL || (c) == NUL) ? KE_FILLER : KEY2TERMCAP1(c))

/*
 * get single int code from second byte after K_SPECIAL
 */
#define TO_SPECIAL(a, b)    ((a) == KS_SPECIAL ? K_SPECIAL : (a) == KS_ZERO ? K_ZERO : TERMCAP2KEY(a, b))

/*
 * Codes for keys that do not have a termcap name.
 *
 * K_SPECIAL KS_EXTRA KE_xxx
 */
enum key_extra
{
    KE_NAME = 3         /* name of this terminal entry */

    , KE_S_UP           /* shift-up */
    , KE_S_DOWN         /* shift-down */

    , KE_S_F1           /* shifted function keys */
    , KE_S_F2
    , KE_S_F3
    , KE_S_F4
    , KE_S_F5
    , KE_S_F6
    , KE_S_F7
    , KE_S_F8
    , KE_S_F9
    , KE_S_F10

    , KE_S_F11
    , KE_S_F12
    , KE_S_F13
    , KE_S_F14
    , KE_S_F15
    , KE_S_F16
    , KE_S_F17
    , KE_S_F18
    , KE_S_F19
    , KE_S_F20

    , KE_S_F21
    , KE_S_F22
    , KE_S_F23
    , KE_S_F24
    , KE_S_F25
    , KE_S_F26
    , KE_S_F27
    , KE_S_F28
    , KE_S_F29
    , KE_S_F30

    , KE_S_F31
    , KE_S_F32
    , KE_S_F33
    , KE_S_F34
    , KE_S_F35
    , KE_S_F36
    , KE_S_F37

    , KE_MOUSE          /* mouse event start */

/*
 * Symbols for pseudo keys which are translated from the real key symbols
 * above.
 */
    , KE_LEFTMOUSE      /* Left mouse button click */
    , KE_LEFTDRAG       /* Drag with left mouse button down */
    , KE_LEFTRELEASE    /* Left mouse button release */
    , KE_MIDDLEMOUSE    /* Middle mouse button click */
    , KE_MIDDLEDRAG     /* Drag with middle mouse button down */
    , KE_MIDDLERELEASE  /* Middle mouse button release */
    , KE_RIGHTMOUSE     /* Right mouse button click */
    , KE_RIGHTDRAG      /* Drag with right mouse button down */
    , KE_RIGHTRELEASE   /* Right mouse button release */

    , KE_IGNORE         /* Ignored mouse drag/release */

    , KE_TAB            /* unshifted TAB key */
    , KE_S_TAB_OLD      /* shifted TAB key (no longer used) */

    , KE_SNIFF          /* SNiFF+ input waiting */

    , KE_XF1            /* extra vt100 function keys for xterm */
    , KE_XF2
    , KE_XF3
    , KE_XF4
    , KE_XEND           /* extra (vt100) end key for xterm */
    , KE_ZEND           /* extra (vt100) end key for xterm */
    , KE_XHOME          /* extra (vt100) home key for xterm */
    , KE_ZHOME          /* extra (vt100) home key for xterm */
    , KE_XUP            /* extra vt100 cursor keys for xterm */
    , KE_XDOWN
    , KE_XLEFT
    , KE_XRIGHT

    , KE_LEFTMOUSE_NM   /* non-mappable Left mouse button click */
    , KE_LEFTRELEASE_NM /* non-mappable left mouse button release */

    , KE_S_XF1          /* extra vt100 shifted function keys for xterm */
    , KE_S_XF2
    , KE_S_XF3
    , KE_S_XF4

    , KE_MOUSEDOWN      /* scroll wheel pseudo-button Down */
    , KE_MOUSEUP        /* scroll wheel pseudo-button Up */

    , KE_KINS           /* keypad Insert key */
    , KE_KDEL           /* keypad Delete key */

    , KE_CSI            /* CSI typed directly */
    , KE_SNR            /* <SNR> */
    , KE_PLUG           /* <Plug> */
    , KE_CMDWIN         /* open command-line window from Command-line Mode */

    , KE_C_LEFT         /* control-left */
    , KE_C_RIGHT        /* control-right */
    , KE_C_HOME         /* control-home */
    , KE_C_END          /* control-end */

    , KE_X1MOUSE        /* X1/X2 mouse-buttons */
    , KE_X1DRAG
    , KE_X1RELEASE
    , KE_X2MOUSE
    , KE_X2DRAG
    , KE_X2RELEASE

    , KE_DROP           /* DnD data is available */
    , KE_CURSORHOLD     /* CursorHold event */
    , KE_NOP            /* doesn't do something */
};

/*
 * the three byte codes are replaced with the following int when using vgetc()
 */
#define K_ZERO          TERMCAP2KEY(KS_ZERO, KE_FILLER)

#define K_UP            TERMCAP2KEY('k', 'u')
#define K_DOWN          TERMCAP2KEY('k', 'd')
#define K_LEFT          TERMCAP2KEY('k', 'l')
#define K_RIGHT         TERMCAP2KEY('k', 'r')
#define K_S_UP          TERMCAP2KEY(KS_EXTRA, KE_S_UP)
#define K_S_DOWN        TERMCAP2KEY(KS_EXTRA, KE_S_DOWN)
#define K_S_LEFT        TERMCAP2KEY('#', '4')
#define K_C_LEFT        TERMCAP2KEY(KS_EXTRA, KE_C_LEFT)
#define K_S_RIGHT       TERMCAP2KEY('%', 'i')
#define K_C_RIGHT       TERMCAP2KEY(KS_EXTRA, KE_C_RIGHT)
#define K_S_HOME        TERMCAP2KEY('#', '2')
#define K_C_HOME        TERMCAP2KEY(KS_EXTRA, KE_C_HOME)
#define K_S_END         TERMCAP2KEY('*', '7')
#define K_C_END         TERMCAP2KEY(KS_EXTRA, KE_C_END)
#define K_TAB           TERMCAP2KEY(KS_EXTRA, KE_TAB)
#define K_S_TAB         TERMCAP2KEY('k', 'B')

/* extra set of function keys F1-F4, for vt100 compatible xterm */
#define K_XF1           TERMCAP2KEY(KS_EXTRA, KE_XF1)
#define K_XF2           TERMCAP2KEY(KS_EXTRA, KE_XF2)
#define K_XF3           TERMCAP2KEY(KS_EXTRA, KE_XF3)
#define K_XF4           TERMCAP2KEY(KS_EXTRA, KE_XF4)

/* extra set of cursor keys for vt100 compatible xterm */
#define K_XUP           TERMCAP2KEY(KS_EXTRA, KE_XUP)
#define K_XDOWN         TERMCAP2KEY(KS_EXTRA, KE_XDOWN)
#define K_XLEFT         TERMCAP2KEY(KS_EXTRA, KE_XLEFT)
#define K_XRIGHT        TERMCAP2KEY(KS_EXTRA, KE_XRIGHT)

#define K_F1            TERMCAP2KEY('k', '1')   /* function keys */
#define K_F2            TERMCAP2KEY('k', '2')
#define K_F3            TERMCAP2KEY('k', '3')
#define K_F4            TERMCAP2KEY('k', '4')
#define K_F5            TERMCAP2KEY('k', '5')
#define K_F6            TERMCAP2KEY('k', '6')
#define K_F7            TERMCAP2KEY('k', '7')
#define K_F8            TERMCAP2KEY('k', '8')
#define K_F9            TERMCAP2KEY('k', '9')
#define K_F10           TERMCAP2KEY('k', ';')

#define K_F11           TERMCAP2KEY('F', '1')
#define K_F12           TERMCAP2KEY('F', '2')
#define K_F13           TERMCAP2KEY('F', '3')
#define K_F14           TERMCAP2KEY('F', '4')
#define K_F15           TERMCAP2KEY('F', '5')
#define K_F16           TERMCAP2KEY('F', '6')
#define K_F17           TERMCAP2KEY('F', '7')
#define K_F18           TERMCAP2KEY('F', '8')
#define K_F19           TERMCAP2KEY('F', '9')
#define K_F20           TERMCAP2KEY('F', 'A')

#define K_F21           TERMCAP2KEY('F', 'B')
#define K_F22           TERMCAP2KEY('F', 'C')
#define K_F23           TERMCAP2KEY('F', 'D')
#define K_F24           TERMCAP2KEY('F', 'E')
#define K_F25           TERMCAP2KEY('F', 'F')
#define K_F26           TERMCAP2KEY('F', 'G')
#define K_F27           TERMCAP2KEY('F', 'H')
#define K_F28           TERMCAP2KEY('F', 'I')
#define K_F29           TERMCAP2KEY('F', 'J')
#define K_F30           TERMCAP2KEY('F', 'K')

#define K_F31           TERMCAP2KEY('F', 'L')
#define K_F32           TERMCAP2KEY('F', 'M')
#define K_F33           TERMCAP2KEY('F', 'N')
#define K_F34           TERMCAP2KEY('F', 'O')
#define K_F35           TERMCAP2KEY('F', 'P')
#define K_F36           TERMCAP2KEY('F', 'Q')
#define K_F37           TERMCAP2KEY('F', 'R')

/* extra set of shifted function keys F1-F4, for vt100 compatible xterm */
#define K_S_XF1         TERMCAP2KEY(KS_EXTRA, KE_S_XF1)
#define K_S_XF2         TERMCAP2KEY(KS_EXTRA, KE_S_XF2)
#define K_S_XF3         TERMCAP2KEY(KS_EXTRA, KE_S_XF3)
#define K_S_XF4         TERMCAP2KEY(KS_EXTRA, KE_S_XF4)

#define K_S_F1          TERMCAP2KEY(KS_EXTRA, KE_S_F1)  /* shifted func. keys */
#define K_S_F2          TERMCAP2KEY(KS_EXTRA, KE_S_F2)
#define K_S_F3          TERMCAP2KEY(KS_EXTRA, KE_S_F3)
#define K_S_F4          TERMCAP2KEY(KS_EXTRA, KE_S_F4)
#define K_S_F5          TERMCAP2KEY(KS_EXTRA, KE_S_F5)
#define K_S_F6          TERMCAP2KEY(KS_EXTRA, KE_S_F6)
#define K_S_F7          TERMCAP2KEY(KS_EXTRA, KE_S_F7)
#define K_S_F8          TERMCAP2KEY(KS_EXTRA, KE_S_F8)
#define K_S_F9          TERMCAP2KEY(KS_EXTRA, KE_S_F9)
#define K_S_F10         TERMCAP2KEY(KS_EXTRA, KE_S_F10)

#define K_S_F11         TERMCAP2KEY(KS_EXTRA, KE_S_F11)
#define K_S_F12         TERMCAP2KEY(KS_EXTRA, KE_S_F12)
/* K_S_F13 to K_S_F37  are currently not used */

#define K_HELP          TERMCAP2KEY('%', '1')
#define K_UNDO          TERMCAP2KEY('&', '8')

#define K_BS            TERMCAP2KEY('k', 'b')

#define K_INS           TERMCAP2KEY('k', 'I')
#define K_KINS          TERMCAP2KEY(KS_EXTRA, KE_KINS)
#define K_DEL           TERMCAP2KEY('k', 'D')
#define K_KDEL          TERMCAP2KEY(KS_EXTRA, KE_KDEL)
#define K_HOME          TERMCAP2KEY('k', 'h')
#define K_KHOME         TERMCAP2KEY('K', '1')   /* keypad home (upper left) */
#define K_XHOME         TERMCAP2KEY(KS_EXTRA, KE_XHOME)
#define K_ZHOME         TERMCAP2KEY(KS_EXTRA, KE_ZHOME)
#define K_END           TERMCAP2KEY('@', '7')
#define K_KEND          TERMCAP2KEY('K', '4')   /* keypad end (lower left) */
#define K_XEND          TERMCAP2KEY(KS_EXTRA, KE_XEND)
#define K_ZEND          TERMCAP2KEY(KS_EXTRA, KE_ZEND)
#define K_PAGEUP        TERMCAP2KEY('k', 'P')
#define K_PAGEDOWN      TERMCAP2KEY('k', 'N')
#define K_KPAGEUP       TERMCAP2KEY('K', '3')   /* keypad pageup (upper R.) */
#define K_KPAGEDOWN     TERMCAP2KEY('K', '5')   /* keypad pagedown (lower R.) */

#define K_KPLUS         TERMCAP2KEY('K', '6')   /* keypad plus */
#define K_KMINUS        TERMCAP2KEY('K', '7')   /* keypad minus */
#define K_KDIVIDE       TERMCAP2KEY('K', '8')   /* keypad / */
#define K_KMULTIPLY     TERMCAP2KEY('K', '9')   /* keypad * */
#define K_KENTER        TERMCAP2KEY('K', 'A')   /* keypad Enter */
#define K_KPOINT        TERMCAP2KEY('K', 'B')   /* keypad . or ,*/

#define K_K0            TERMCAP2KEY('K', 'C')   /* keypad 0 */
#define K_K1            TERMCAP2KEY('K', 'D')   /* keypad 1 */
#define K_K2            TERMCAP2KEY('K', 'E')   /* keypad 2 */
#define K_K3            TERMCAP2KEY('K', 'F')   /* keypad 3 */
#define K_K4            TERMCAP2KEY('K', 'G')   /* keypad 4 */
#define K_K5            TERMCAP2KEY('K', 'H')   /* keypad 5 */
#define K_K6            TERMCAP2KEY('K', 'I')   /* keypad 6 */
#define K_K7            TERMCAP2KEY('K', 'J')   /* keypad 7 */
#define K_K8            TERMCAP2KEY('K', 'K')   /* keypad 8 */
#define K_K9            TERMCAP2KEY('K', 'L')   /* keypad 9 */

#define K_MOUSE         TERMCAP2KEY(KS_MOUSE, KE_FILLER)
#define K_MENU          TERMCAP2KEY(KS_MENU, KE_FILLER)
#define K_VER_SCROLLBAR TERMCAP2KEY(KS_VER_SCROLLBAR, KE_FILLER)
#define K_HOR_SCROLLBAR   TERMCAP2KEY(KS_HOR_SCROLLBAR, KE_FILLER)

#define K_NETTERM_MOUSE TERMCAP2KEY(KS_NETTERM_MOUSE, KE_FILLER)
#define K_DEC_MOUSE     TERMCAP2KEY(KS_DEC_MOUSE, KE_FILLER)
#define K_JSBTERM_MOUSE TERMCAP2KEY(KS_JSBTERM_MOUSE, KE_FILLER)
#define K_PTERM_MOUSE   TERMCAP2KEY(KS_PTERM_MOUSE, KE_FILLER)

#define K_SELECT        TERMCAP2KEY(KS_SELECT, KE_FILLER)
#define K_TEAROFF       TERMCAP2KEY(KS_TEAROFF, KE_FILLER)

#define K_TABLINE       TERMCAP2KEY(KS_TABLINE, KE_FILLER)
#define K_TABMENU       TERMCAP2KEY(KS_TABMENU, KE_FILLER)

/*
 * Symbols for pseudo keys which are translated from the real key symbols
 * above.
 */
#define K_LEFTMOUSE     TERMCAP2KEY(KS_EXTRA, KE_LEFTMOUSE)
#define K_LEFTMOUSE_NM  TERMCAP2KEY(KS_EXTRA, KE_LEFTMOUSE_NM)
#define K_LEFTDRAG      TERMCAP2KEY(KS_EXTRA, KE_LEFTDRAG)
#define K_LEFTRELEASE   TERMCAP2KEY(KS_EXTRA, KE_LEFTRELEASE)
#define K_LEFTRELEASE_NM TERMCAP2KEY(KS_EXTRA, KE_LEFTRELEASE_NM)
#define K_MIDDLEMOUSE   TERMCAP2KEY(KS_EXTRA, KE_MIDDLEMOUSE)
#define K_MIDDLEDRAG    TERMCAP2KEY(KS_EXTRA, KE_MIDDLEDRAG)
#define K_MIDDLERELEASE TERMCAP2KEY(KS_EXTRA, KE_MIDDLERELEASE)
#define K_RIGHTMOUSE    TERMCAP2KEY(KS_EXTRA, KE_RIGHTMOUSE)
#define K_RIGHTDRAG     TERMCAP2KEY(KS_EXTRA, KE_RIGHTDRAG)
#define K_RIGHTRELEASE  TERMCAP2KEY(KS_EXTRA, KE_RIGHTRELEASE)
#define K_X1MOUSE       TERMCAP2KEY(KS_EXTRA, KE_X1MOUSE)
#define K_X1MOUSE       TERMCAP2KEY(KS_EXTRA, KE_X1MOUSE)
#define K_X1DRAG        TERMCAP2KEY(KS_EXTRA, KE_X1DRAG)
#define K_X1RELEASE     TERMCAP2KEY(KS_EXTRA, KE_X1RELEASE)
#define K_X2MOUSE       TERMCAP2KEY(KS_EXTRA, KE_X2MOUSE)
#define K_X2DRAG        TERMCAP2KEY(KS_EXTRA, KE_X2DRAG)
#define K_X2RELEASE     TERMCAP2KEY(KS_EXTRA, KE_X2RELEASE)

#define K_IGNORE        TERMCAP2KEY(KS_EXTRA, KE_IGNORE)
#define K_NOP           TERMCAP2KEY(KS_EXTRA, KE_NOP)

#define K_SNIFF         TERMCAP2KEY(KS_EXTRA, KE_SNIFF)

#define K_MOUSEDOWN     TERMCAP2KEY(KS_EXTRA, KE_MOUSEDOWN)
#define K_MOUSEUP       TERMCAP2KEY(KS_EXTRA, KE_MOUSEUP)

#define K_CSI           TERMCAP2KEY(KS_EXTRA, KE_CSI)
#define K_SNR           TERMCAP2KEY(KS_EXTRA, KE_SNR)
#define K_PLUG          TERMCAP2KEY(KS_EXTRA, KE_PLUG)
#define K_CMDWIN        TERMCAP2KEY(KS_EXTRA, KE_CMDWIN)

#define K_DROP          TERMCAP2KEY(KS_EXTRA, KE_DROP)

#define K_CURSORHOLD    TERMCAP2KEY(KS_EXTRA, KE_CURSORHOLD)

/* Bits for modifier mask */
/* 0x01 cannot be used, because the modifier must be 0x02 or higher */
#define MOD_MASK_SHIFT      0x02
#define MOD_MASK_CTRL       0x04
#define MOD_MASK_ALT        0x08        /* aka META */
#define MOD_MASK_META       0x10        /* META when it's different from ALT */
#define MOD_MASK_2CLICK     0x20        /* use MOD_MASK_MULTI_CLICK */
#define MOD_MASK_3CLICK     0x40        /* use MOD_MASK_MULTI_CLICK */
#define MOD_MASK_4CLICK     0x60        /* use MOD_MASK_MULTI_CLICK */
#ifdef MACOS
# define MOD_MASK_CMD       0x80
#endif

#define MOD_MASK_MULTI_CLICK    (MOD_MASK_2CLICK|MOD_MASK_3CLICK|MOD_MASK_4CLICK)

/*
 * The length of the longest special key name, including modifiers.
 * Current longest is <M-C-S-T-4-MiddleRelease> (length includes '<' and '>').
 */
#define MAX_KEY_NAME_LEN    25

/* Maximum length of a special key event as tokens.  This includes modifiers.
 * The longest event is something like <M-C-S-T-4-LeftDrag> which would be the
 * following string of tokens:
 *
 * <K_SPECIAL> <KS_MODIFIER> bitmask <K_SPECIAL> <KS_EXTRA> <KT_LEFTDRAG>.
 *
 * This is a total of 6 tokens, and is currently the longest one possible.
 */
#define MAX_KEY_CODE_LEN    6