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/*
* zle.h - header file for line editor
*
* This file is part of zsh, the Z shell.
*
* Copyright (c) 1992-1997 Paul Falstad
* All rights reserved.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and to distribute modified versions of this software for any
* purpose, provided that the above copyright notice and the following
* two paragraphs appear in all copies of this software.
*
* In no event shall Paul Falstad or the Zsh Development Group be liable
* to any party for direct, indirect, special, incidental, or consequential
* damages arising out of the use of this software and its documentation,
* even if Paul Falstad and the Zsh Development Group have been advised of
* the possibility of such damage.
*
* Paul Falstad and the Zsh Development Group specifically disclaim any
* warranties, including, but not limited to, the implied warranties of
* merchantability and fitness for a particular purpose. The software
* provided hereunder is on an "as is" basis, and Paul Falstad and the
* Zsh Development Group have no obligation to provide maintenance,
* support, updates, enhancements, or modifications.
*
*/

#ifdef MULTIBYTE_SUPPORT
typedef wchar_t ZLE_CHAR_T;
typedef wchar_t *ZLE_STRING_T;
typedef wint_t ZLE_INT_T;
#define ZLE_CHAR_SIZE sizeof(wchar_t)


#define ZLEEOF WEOF

/* Functions that operate on a ZLE_STRING_T. */
#define ZS_memcpy wmemcpy
#define ZS_memmove wmemmove
#define ZS_memset wmemset
#define ZS_memcmp wmemcmp
#define ZS_strlen wcslen
#define ZS_strcpy wcscpy
#define ZS_strncpy wcsncpy
#define ZS_strncmp wcsncmp
#define ZS_zarrdup wcs_zarrdup
#define ZS_width wcslen
#define ZS_strchr wcschr
#define ZS_memchr wmemchr

/*
* Functions that operate on a metafied string.
* These versions handle multibyte characters.
*/
#define ZMB_nicewidth(s) mb_niceformat(s, NULL, NULL, 0)

/* Functions that operate on ZLE_CHAR_T. */
#define ZC_ialpha iswalpha
#define ZC_ialnum iswalnum
#define ZC_iblank wcsiblank
#define ZC_icntrl iswcntrl
#define ZC_idigit iswdigit
#define ZC_iident(x) wcsitype((x), IIDENT)
#define ZC_ilower iswlower
#define ZC_inblank iswspace
#define ZC_iupper iswupper
#define ZC_iword(x) wcsitype((x), IWORD)

#define ZC_tolower towlower
#define ZC_toupper towupper

#define LASTFULLCHAR lastchar_wide
#define LASTFULLCHAR_T ZLE_INT_T

/*
* We may need to handle combining character alignment.
* The following fix up the position of the cursor so that it
* never ends up over a zero-width punctuation character following
* an alphanumeric character. The first is used if we were
* moving the cursor left, the second if we were moving right or
* if something under the cursor may have changed.
*/
#define CCLEFT() alignmultiwordleft(&zlecs, 1)
#define CCRIGHT() alignmultiwordright(&zlecs, 1)
/*
* Same for any other position
*/
#define CCLEFTPOS(pos) alignmultiwordleft(&pos, 1)
#define CCRIGHTPOS(pos) alignmultiwordright(&pos, 1)
/*
* Increment or decrement the cursor position, skipping over
* combining characters.
*/
#define INCCS() inccs()
#define DECCS() deccs()
/*
* Same for any other position.
*/
#define INCPOS(pos) incpos(&pos)
#define DECPOS(pos) decpos(&pos)

#else /* Not MULTIBYTE_SUPPORT: old single-byte code */

typedef char ZLE_CHAR_T;
typedef char *ZLE_STRING_T;
typedef int ZLE_INT_T;
#define ZLE_CHAR_SIZE sizeof(ZLE_CHAR_T)

#define ZLEEOF EOF

/* Functions that operate on a ZLE_STRING_T. */
#define ZS_memcpy memcpy
#define ZS_memmove memmove
#define ZS_memset memset
#define ZS_memcmp memcmp
#define ZS_zarrdup zarrdup
#define ZS_width ztrlen
#define ZS_strchr strchr
#define ZS_memchr memchr

/*
* Functions that operate on a metafied string.
* These versions don't handle multibyte characters.
*/
#define ZMB_nicewidth niceztrlen

#ifdef __GNUC__
static inline size_t ZS_strlen(ZLE_STRING_T s)
{ return strlen((char*)s); }
static inline ZLE_STRING_T ZS_strcpy(ZLE_STRING_T t, ZLE_STRING_T f)
{ return (ZLE_STRING_T)strcpy((char*)t, (char*)f); }
static inline ZLE_STRING_T ZS_strncpy(ZLE_STRING_T t, ZLE_STRING_T f, size_t l)
{ return (ZLE_STRING_T)strncpy((char*)t, (char*)f, l); }
static inline int ZS_strncmp(ZLE_STRING_T s1, ZLE_STRING_T s2, size_t l)
{ return strncmp((char*)s1, (char*)s2, l); }
#else
#define ZS_strlen(s) strlen((char*)(s))
#define ZS_strcpy(t,f) strcpy((char*)(t),(char*)(f))
#define ZS_strncpy(t,f,l) strncpy((char*)(t),(char*)(f),(l))
#define ZS_strncmp(s1,s2,l) strncmp((char*)(s1),(char*)(s2),(l))
#endif

/* Functions that operate on ZLE_CHAR_T. */
#define ZC_ialpha ialpha
#define ZC_ialnum ialnum
#define ZC_iblank iblank
#define ZC_icntrl icntrl
#define ZC_idigit idigit
#define ZC_iident iident
#define ZC_ilower islower
#define ZC_inblank inblank
#define ZC_iupper isupper
#define ZC_iword iword

#define ZC_tolower tulower
#define ZC_toupper tuupper

#define LASTFULLCHAR lastchar
#define LASTFULLCHAR_T int

/* Combining character alignment: none in this mode */
#define CCLEFT()
#define CCRIGHT()
#define CCLEFTPOS(pos)
#define CCRIGHTPOS(pos)
/*
* Increment or decrement the cursor position: simple in this case.
*/
#define INCCS() ((void)(zlecs++))
#define DECCS() ((void)(zlecs--))
/*
* Same for any other position.
*/
#define INCPOS(pos) ((void)(pos++))
#define DECPOS(pos) ((void)(pos--))

#endif


typedef struct widget *Widget;
typedef struct thingy *Thingy;

/* widgets (ZLE functions) */

typedef int (*ZleIntFunc) _((char **));

struct widget {
    int flags; /* flags (see below) */
    Thingy first; /* `first' thingy that names this widget */
    union {
ZleIntFunc fn; /* pointer to internally implemented widget */
char *fnnam; /* name of the shell function for user-defined widget */
struct {
ZleIntFunc fn; /* internal widget function to call */
char *wid; /* name of widget to call */
char *func; /* name of shell function to call */
} comp;
    } u;
};

#define WIDGET_INT (1<<0) /* widget is internally implemented */
#define WIDGET_NCOMP (1<<1) /* new style completion widget */
#define ZLE_MENUCMP (1<<2) /* DON'T invalidate completion list */
#define ZLE_YANK (1<<3)
#define ZLE_LINEMOVE (1<<4) /* command is a line-oriented movement */
#define ZLE_LASTCOL (1<<5) /* command maintains lastcol correctly */
#define ZLE_KILL (1<<6)
#define ZLE_KEEPSUFFIX (1<<7) /* DON'T remove added suffix */
#define ZLE_NOTCOMMAND (1<<8) /* widget should not alter lastcmd */
#define ZLE_ISCOMP (1<<9) /* usable for new style completion */

/* thingies */

struct thingy {
    HashNode next; /* next node in the hash chain */
    char *nam; /* name of the thingy */
    int flags; /* TH_* flags (see below) */
    int rc; /* reference count */
    Widget widget; /* widget named by this thingy */
    Thingy samew; /* `next' thingy (circularly) naming the same widget */
};

/* DISABLED is (1<<0) */
#define TH_IMMORTAL (1<<1) /* can't refer to a different widget */

/* command modifier prefixes */

struct modifier {
    int flags; /* MOD_* flags (see below) */
    int mult; /* repeat count */
    int tmult; /* repeat count actually being edited */
    int vibuf; /* vi cut buffer */
    int base; /* numeric base for digit arguments (usually 10) */
};

#define MOD_MULT (1<<0) /* a repeat count has been selected */
#define MOD_TMULT (1<<1) /* a repeat count is being entered */
#define MOD_VIBUF (1<<2) /* a vi cut buffer has been selected */
#define MOD_VIAPP (1<<3) /* appending to the vi cut buffer */
#define MOD_NEG (1<<4) /* last command was negate argument */

/* current modifier status */

#define zmult (zmod.mult)

/* flags to cut() and cuttext() and other front-ends */

#define CUT_FRONT (1<<0) /* Text goes in front of cut buffer */
#define CUT_REPLACE (1<<1) /* Text replaces cut buffer */
#define CUT_RAW (1<<2) /*
* Raw character counts (not used in cut itself).
* This is used when the values are offsets
* into the zleline array rather than numbers
* of visible characters directly input by
* the user.
*/

/* undo system */

struct change {
    struct change *prev, *next; /* adjacent changes */
    int flags; /* see below */
    int hist; /* history line being changed */
    int off; /* offset of the text changes */
    ZLE_STRING_T del; /* characters to delete */
    int dell; /* no. of characters in del */
    ZLE_STRING_T ins; /* characters to insert */
    int insl; /* no. of characters in ins */
    int old_cs, new_cs; /* old and new cursor positions */
    zlong changeno; /* unique number of this change */
};

#define CH_NEXT (1<<0) /* next structure is also part of this change */
#define CH_PREV (1<<1) /* previous structure is also part of this change */

/* known thingies */

#define Th(X) (&thingies[X])

/* opaque keymap type */

typedef struct keymap *Keymap;

typedef void (*KeyScanFunc) _((char *, Thingy, char *, void *));

#define invicmdmode() (!strcmp(curkeymapname, "vicmd"))

/* Standard type of suffix removal. */

#ifdef MULTIBYTE_SUPPORT
#define NO_INSERT_CHAR WEOF
#else
#define NO_INSERT_CHAR 256
#endif
#define removesuffix() iremovesuffix(NO_INSERT_CHAR, 0)

/*
* Cut/kill buffer type. The buffer itself is purely binary data, not
* NUL-terminated. len is a length count (N.B. number of characters,
* not size in bytes). flags uses the CUTBUFFER_* constants defined
* below.
*/

struct cutbuffer {
    ZLE_STRING_T buf;
    size_t len;
    char flags;
};

typedef struct cutbuffer *Cutbuffer;

#define CUTBUFFER_LINE 1 /* for vi: buffer contains whole lines of data */

#define KRINGCTDEF 8 /* default number of buffers in the kill ring */

/* Types of completion. */

#define COMP_COMPLETE 0
#define COMP_LIST_COMPLETE 1
#define COMP_SPELL 2
#define COMP_EXPAND 3
#define COMP_EXPAND_COMPLETE 4
#define COMP_LIST_EXPAND 5
#define COMP_ISEXPAND(X) ((X) >= COMP_EXPAND)

/* Information about one brace run. */

typedef struct brinfo *Brinfo;

struct brinfo {
    Brinfo next; /* next in list */
    Brinfo prev; /* previous (only for closing braces) */
    char *str; /* the string to insert */
    int pos; /* original position */
    int qpos; /* original position, with quoting */
    int curpos; /* position for current match */
};

/* Convenience macros for the hooks */

#define LISTMATCHESHOOK (zlehooks + 0)
#define COMPLETEHOOK (zlehooks + 1)
#define BEFORECOMPLETEHOOK (zlehooks + 2)
#define AFTERCOMPLETEHOOK (zlehooks + 3)
#define ACCEPTCOMPHOOK (zlehooks + 4)
#define REVERSEMENUHOOK (zlehooks + 5)
#define INVALIDATELISTHOOK (zlehooks + 6)

/* complete hook data struct */

typedef struct compldat *Compldat;

struct compldat {
    char *s;
    int lst;
    int incmd;
};

/* List completion matches. */

#define listmatches() runhookdef(LISTMATCHESHOOK, NULL)

/* Invalidate the completion list. */

#define invalidatelist() runhookdef(INVALIDATELISTHOOK, NULL)

/* Bit flags to setline */
enum {
    ZSL_COPY = 1, /* Copy the argument, don't modify it */
    ZSL_TOEND = 2, /* Go to the end of the new line */
};


/* Type arguments to addsuffix() */
enum suffixtype {
    SUFTYP_POSSTR, /* String of characters to match */
    SUFTYP_NEGSTR, /* String of characters not to match */
    SUFTYP_POSRNG, /* Range of characters to match */
    SUFTYP_NEGRNG /* Range of characters not to match */
};

/* Additional flags to suffixes */
enum suffixflags {
    SUFFLAGS_SPACE = 0x0001 /* Add a space when removing suffix */
};


/* Flags for the region_highlight structure */
enum {
    /* Offsets include predisplay */
    ZRH_PREDISPLAY = 1
};

/*
* Attributes used for highlighting regions.
* and mark.
*/
struct region_highlight {
    /* Attributes turned on in the region */
    int atr;
    /* Start of the region */
    int start;
    /* Start of the region in metafied ZLE line */
    int start_meta;
    /*
* End of the region: position of the first character not highlighted
* (the same system as for point and mark).
*/
    int end;
    /* End of the region in metafied ZLE line */
    int end_meta;
    /*
* Any of the flags defined above.
*/
    int flags;
};

/*
* Count of special uses of region highlighting, which account
* for the first few elements of region_highlights.
* 0: region between point and mark
* 1: isearch region
* 2: suffix
*/
#define N_SPECIAL_HIGHLIGHTS (3)


#ifdef MULTIBYTE_SUPPORT
/*
* We use a wint_t here, since we need an invalid character as a
* placeholder and wint_t guarantees that we can use WEOF to do this.
*/
typedef wint_t REFRESH_CHAR;
#else
typedef char REFRESH_CHAR;
#endif

/*
* Description of one screen cell in zle_refresh.c
*/
typedef struct {
    /*
* The (possibly wide) character.
* If atr contains TXT_MULTIWORD_MASK, an index into the set of multiword
* symbols (only if MULTIBYTE_SUPPORT is present).
*/
    REFRESH_CHAR chr;
    /*
* Its attributes. 'On' attributes (TXT_ATTR_ON_MASK) are
* applied before the character, 'off' attributes (TXT_ATTR_OFF_MASK)
* after it. 'On' attributes are present for all characters that
* need the effect; 'off' attributes are only present for the
* last character in the sequence.
*/
    int atr;
} REFRESH_ELEMENT;

/* A string of screen cells */
typedef REFRESH_ELEMENT *REFRESH_STRING;


#if defined(MULTIBYTE_SUPPORT) && defined(__STDC_ISO_10646__)
/*
* With ISO 10646 there is a private range defined within
* the encoding. We use this for storing single-byte
* characters in sections of strings that wouldn't convert to wide
* characters. This allows to preserve the string when transformed
* back to multibyte strings.
*/

/* The start of the private range we use, for 256 characters */
#define ZSH_INVALID_WCHAR_BASE (0xe000U)
/* Detect a wide character within our range */
#define ZSH_INVALID_WCHAR_TEST(x) \
((unsigned)(x) >= ZSH_INVALID_WCHAR_BASE && \
(unsigned)(x) <= (ZSH_INVALID_WCHAR_BASE + 255u))
/* Turn a wide character in that range back to single byte */
#define ZSH_INVALID_WCHAR_TO_CHAR(x) \
((char)((unsigned)(x) - ZSH_INVALID_WCHAR_BASE))
/* Turn a wide character in that range to an integer */
#define ZSH_INVALID_WCHAR_TO_INT(x) \
((int)((unsigned)(x) - ZSH_INVALID_WCHAR_BASE))
/* Turn a single byte character into a private wide character */
#define ZSH_CHAR_TO_INVALID_WCHAR(x) \
((wchar_t)(STOUC(x) + ZSH_INVALID_WCHAR_BASE))
#endif


#ifdef DEBUG
#define METACHECK() \
DPUTS(zlemetaline == NULL, "line not metafied")
#define UNMETACHECK() \
DPUTS(zlemetaline != NULL, "line metafied")
#else
#define METACHECK()
#define UNMETACHECK()
#endif
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