/* $Id: linein.c,v 1.8 2001/11/24 02:01:26 ukai Exp $ */
#include "fm.h"
#include "local.h"
#include "myctype.h"

#ifdef USE_MOUSE
#ifdef USE_GPM
#include <gpm.h>
#endif
#if defined(USE_GPM) || defined(USE_SYSMOUSE)
extern int do_getch();
#define getch()	do_getch()
#endif				/* USE_GPM */
#endif				/* USE_MOUSE */

#ifdef __EMX__
#include <sys/kbdscan.h>
#endif

#define STR_LEN	1024
#define CLEN (COLS - 2)

static Str strBuf;
static Lineprop strProp[STR_LEN];

static Str CompleteBuf;
static Str CFileName;
static Str CBeforeBuf;
static Str CAfterBuf;
static Str CDirBuf;
static char **CFileBuf = NULL;
static int NCFileBuf;
static int NCFileOffset;

static void insertself(char c),
_mvR(void), _mvL(void), _mvRw(void), _mvLw(void), delC(void), insC(void),
_mvB(void), _mvE(void), _enter(void), _quo(void), _bs(void), _bsw(void),
killn(void), killb(void), _inbrk(void), _esc(void),
_prev(void), _next(void), _compl(void), _tcompl(void),
_dcompl(void), _rdcompl(void), _rcompl(void);
#ifdef __EMX__
static int getcntrl(void);
#endif

static int terminated(unsigned char c);
#define iself ((void(*)())insertself)

static void next_compl(int next);
static void next_dcompl(int next);
static Str doComplete(Str ifn, int *status, int next);

/* *INDENT-OFF* */
void (*InputKeymap[32]) () = {
/*  C-@     C-a     C-b     C-c     C-d     C-e     C-f     C-g     */
    _compl, _mvB,   _mvL,   _inbrk, delC,   _mvE,   _mvR,   _inbrk,
/*  C-h     C-i     C-j     C-k     C-l     C-m     C-n     C-o     */
    _bs,    iself,  _enter, killn,  iself,  _enter, _next,  iself,
/*  C-p     C-q     C-r     C-s     C-t     C-u     C-v     C-w     */
    _prev,  _quo,   _bsw,   iself,  _mvLw,  killb,  _quo,   iself,
/*  C-x     C-y     C-z     C-[     C-\     C-]     C-^     C-_     */
    _tcompl,_mvRw,  iself,  _esc,   iself,  iself,  iself,  iself,
};
/* *INDENT-ON* */

static int setStrType(Str str, Lineprop *prop);
static void addPasswd(char *p, Lineprop *pr, int len, int pos, int limit);
static void addStr(char *p, Lineprop *pr, int len, int pos, int limit);

static int CPos, CLen, offset;
static int i_cont, i_broken, i_quote;
static int cm_mode, cm_next, cm_clear, cm_disp_next, cm_disp_clear;
static int need_redraw, is_passwd;
static int move_word;

static Hist *CurrentHist;
static Str strCurrentBuf;
static int use_hist;
#ifdef JP_CHARSET
static int in_kanji;
static void ins_kanji(Str tmp);
#endif

char *
inputLineHist(char *prompt, char *def_str, int flag, Hist *hist)
{
    int opos, x, y, lpos, rpos, epos;
    unsigned char c;
    char *p;
    Lineprop mode;
#ifdef JP_CHARSET
    Str tmp = Strnew();
#endif				/* JP_CHARSET */

    mode = PC_ASCII;
#ifdef JP_CHARSET
    in_kanji = FALSE;
#endif
    is_passwd = FALSE;
    move_word = FALSE;

    CurrentHist = hist;
    if (hist != NULL) {
	use_hist = TRUE;
	strCurrentBuf = NULL;
    }
    else {
	use_hist = FALSE;
    }
    if (flag & IN_URL) {
	cm_mode = CPL_ALWAYS | CPL_URL;
	move_word = TRUE;
    }
    else if (flag & IN_FILENAME) {
	cm_mode = CPL_ALWAYS;
	move_word = TRUE;
    }
    else if (flag & IN_PASSWORD) {
	cm_mode = CPL_NEVER;
	is_passwd = TRUE;
    }
    else if (flag & IN_COMMAND)
	cm_mode = CPL_ON;
    else
	cm_mode = CPL_OFF;
    opos = strlen(prompt);
    epos = CLEN - opos;
    if (epos < 0)
	epos = 0;
    lpos = epos / 3;
    rpos = epos * 2 / 3;
    offset = 0;

    if (def_str) {
	strBuf = Strnew_charp(def_str);
	CLen = CPos = setStrType(strBuf, strProp);
    }
    else {
	strBuf = Strnew();
	CLen = CPos = 0;
    }

    i_cont = TRUE;
    i_broken = FALSE;
    i_quote = FALSE;
    cm_next = FALSE;
    cm_disp_next = -1;
    need_redraw = FALSE;
    do {
	x = calcPosition(strBuf->ptr, strProp, CLen, CPos, 0, CP_FORCE);
	if (x - rpos > offset) {
	    y = calcPosition(strBuf->ptr, strProp, CLen, CLen, 0, CP_AUTO);
	    if (y - epos > x - rpos)
		offset = x - rpos;
	    else if (y - epos > 0)
		offset = y - epos;
	}
	else if (x - lpos < offset) {
	    if (x - lpos > 0)
		offset = x - lpos;
	    else
		offset = 0;
	}
	move(LASTLINE, 0);
	addstr(prompt);
	if (is_passwd)
	    addPasswd(strBuf->ptr, strProp, CLen, offset, COLS - opos);
	else
	    addStr(strBuf->ptr, strProp, CLen, offset, COLS - opos);
	clrtoeolx();
	move(LASTLINE, opos + x - offset);
	refresh();

      next_char:
	c = getch();
#ifdef __EMX__
	if (c == 0) {
	    if (!(c = getcntrl()))
		goto next_char;
	}
#endif
	cm_clear = TRUE;
	cm_disp_clear = TRUE;
#ifdef JP_CHARSET
	if (mode == PC_KANJI1) {
	    mode = PC_KANJI2;
	    if (CLen >= STR_LEN)
		goto next_char;
	    Strcat_char(tmp, (c | (DisplayCode == CODE_SJIS ? 0 : 0x80)));
	    tmp = conv_str(tmp,
			   (DisplayCode == CODE_SJIS ? CODE_SJIS : CODE_EUC),
			   InnerCode);
	    ins_kanji(tmp);
	}
	else
#endif
	if (!i_quote &&
		(((cm_mode & CPL_ALWAYS) && (c == CTRL_I || c == ' ')) ||
		     ((cm_mode & CPL_ON) && (c == CTRL_I)))) {
#ifdef EMACS_LIKE_LINEEDIT
	    if (emacs_like_lineedit && cm_next) {
		_dcompl();
		need_redraw = TRUE;
	    }
	    else {
#endif
		_compl();
		cm_disp_next = -1;
#ifdef EMACS_LIKE_LINEEDIT
	    }
#endif
	}
	else if (!i_quote && CLen == CPos &&
		 (cm_mode & CPL_ALWAYS || cm_mode & CPL_ON) && c == CTRL_D) {
#ifdef EMACS_LIKE_LINEEDIT
	    if (!emacs_like_lineedit) {
#endif
		_dcompl();
		need_redraw = TRUE;
#ifdef EMACS_LIKE_LINEEDIT
	    }
#endif
	}
	else if (!i_quote && c == DEL_CODE) {
	    _bs();
	    cm_next = FALSE;
	    cm_disp_next = -1;
	}
	else if (!i_quote && c < 0x20) {	/* Control code */
	    (*InputKeymap[(int)c]) (c);
	    if (cm_clear)
		cm_next = FALSE;
	    if (cm_disp_clear)
		cm_disp_next = -1;
	}
#ifdef JP_CHARSET
	else if (DisplayCode == CODE_SJIS && 0xa0 <= c && c <= 0xdf) {
	    i_quote = FALSE;
	    cm_next = FALSE;
	    if (CLen >= STR_LEN)
		goto next_char;
	    Strclear(tmp);
	    Strcat_char(tmp, c);
	    tmp = conv_str(tmp, DisplayCode, InnerCode);
	    ins_kanji(tmp);
	}
	else if ((c & 0x80) || in_kanji) {	/* Kanji 1 */
	    i_quote = FALSE;
	    cm_next = FALSE;
	    cm_disp_next = -1;
	    if (CLen >= STR_LEN - 1)
		goto next_char;
	    Strclear(tmp);
	    Strcat_char(tmp, (c | 0x80));
	    mode = PC_KANJI1;
	    goto next_char;
	}
#endif				/* JP_CHARSET */
	else {
	    i_quote = FALSE;
	    cm_next = FALSE;
	    cm_disp_next = -1;
	    if (CLen >= STR_LEN)
		goto next_char;
	    insC();
	    strBuf->ptr[CPos] = c;
	    if (!is_passwd && IS_CNTRL(c))
		strProp[CPos] = PC_CTRL;
	    else
		strProp[CPos] = PC_ASCII;
	    CPos++;
	    mode = PC_ASCII;
	}
	if (CLen && (flag & IN_CHAR))
	    break;
    } while (i_cont);

    if (need_redraw)
	displayBuffer(Currentbuf, B_FORCE_REDRAW);

    if (i_broken)
	return NULL;
    move(LASTLINE, 0);
    refresh();
    p = strBuf->ptr;
    if (flag & (IN_FILENAME | IN_COMMAND)) {
	SKIP_BLANKS(p);
    }
    if (use_hist && !(flag & IN_URL) && *p != '\0') {
	char *q = lastHist(hist);
	if (!q || strcmp(q, p))
	    pushHist(hist, p);
    }
    if (flag & IN_FILENAME)
	return expandName(p);
    else
	return allocStr(p, 0);
}

#ifdef __EMX__
static int
getcntrl(void)
{
    switch (getch()) {
    case K_DEL:
	return CTRL_D;
    case K_LEFT:
	return CTRL_B;
    case K_RIGHT:
	return CTRL_F;
    case K_UP:
	return CTRL_P;
    case K_DOWN:
	return CTRL_N;
    case K_HOME:
    case K_CTRL_LEFT:
	return CTRL_A;
    case K_END:
    case K_CTRL_RIGHT:
	return CTRL_E;
    case K_CTRL_HOME:
	return CTRL_U;
    case K_CTRL_END:
	return CTRL_K;
    }
    return 0;
}
#endif

static void
addPasswd(char *p, Lineprop *pr, int len, int offset, int limit)
{
    int rcol = 0, ncol;

    ncol = calcPosition(p, pr, len, len, 0, CP_AUTO);
    if (ncol > offset + limit)
	ncol = offset + limit;
    if (offset) {
	addChar('{', 0);
	rcol = offset + 1;
    }
    for (; rcol < ncol; rcol++)
	addChar('*', 0);
}

static void
addStr(char *p, Lineprop *pr, int len, int offset, int limit)
{
    int i = 0, rcol = 0, ncol, delta = 1;

    if (offset) {
	for (i = 0; i < len; i++) {
	    if (calcPosition(p, pr, len, i, 0, CP_AUTO) > offset)
		break;
	}
	if (i >= len)
	    return;
#ifdef JP_CHARSET
	while (pr[i] == PC_KANJI2)
	    i++;
#endif
	addChar('{', 0);
	rcol = offset + 1;
	ncol = calcPosition(p, pr, len, i, 0, CP_AUTO);
	for (; rcol < ncol; rcol++)
	    addChar(' ', 0);
    }
    for (; i < len; i += delta) {
#ifdef JP_CHARSET
	if (CharType(pr[i]) == PC_KANJI1)
	    delta = 2;
	else
	    delta = 1;
#endif
	ncol = calcPosition(p, pr, len, i + delta, 0, CP_AUTO);
	if (ncol - offset > limit)
	    break;
	if (p[i] == '\t') {
	    for (; rcol < ncol; rcol++)
		addChar(' ', 0);
	    continue;
#ifdef JP_CHARSET
	}
	else if (delta == 2) {
	    addChar(p[i], pr[i]);
	    addChar(p[i + 1], pr[i + 1]);
#endif
	}
	else
	    addChar(p[i], pr[i]);
	rcol = ncol;
    }
}

#ifdef JP_CHARSET
static void
ins_kanji(Str tmp)
{
    if (tmp->length != 2)
	return;
    insC();
    strBuf->ptr[CPos] = tmp->ptr[0];
    strProp[CPos] = PC_KANJI1;
    CPos++;
    insC();
    strBuf->ptr[CPos] = tmp->ptr[1];
    strProp[CPos] = PC_KANJI2;
    CPos++;
}
#endif

static void
_esc(void)
{
    char c, c2;

    switch (c = getch()) {
    case '[':
    case 'O':
	switch (c = getch()) {
	case 'A':
	    _prev();
	    break;
	case 'B':
	    _next();
	    break;
	case 'C':
	    _mvR();
	    break;
	case 'D':
	    _mvL();
	    break;
	}
	break;
    case CTRL_I:
    case ' ':
#ifdef EMACS_LIKE_LINEEDIT
	if (emacs_like_lineedit) {
	    _rdcompl();
	    cm_clear = FALSE;
	    need_redraw = TRUE;
	}
	else
#else
	_rcompl();
#endif
	break;
    case CTRL_D:
#ifdef EMACS_LIKE_LINEEDIT
	if (!emacs_like_lineedit)
#else
	_rdcompl();
#endif
	need_redraw = TRUE;
	break;
#ifdef EMACS_LIKE_LINEEDIT
    case 'f':
	if (emacs_like_lineedit)
	    _mvRw();
	break;
    case 'b':
	if (emacs_like_lineedit)
	    _mvLw();
	break;
    case CTRL_H:
	if (emacs_like_lineedit)
	    _bsw();
	break;
#endif
#ifdef JP_CHARSET
    case '$':
	/* ISO-2022-jp characters */
	c2 = getch();
	in_kanji = TRUE;
	break;
    case '(':
	/* ISO-2022-jp characters */
	c2 = getch();
	in_kanji = FALSE;
	break;
#endif
    }
}

static void
insC(void)
{
    int i;

    Strinsert_char(strBuf, CPos, ' ');
    CLen = strBuf->length;
    for (i = CLen; i > CPos; i--) {
	strProp[i] = strProp[i - 1];
    }
}

static void
delC(void)
{
    int i = CPos;
    int delta = 1;

    if (CLen == CPos)
	return;
#ifdef JP_CHARSET
    if (strProp[i] == PC_KANJI1)
	delta = 2;
#endif				/* JP_CHARSET */
    for (i = CPos; i < CLen; i++) {
	strProp[i] = strProp[i + delta];
    }
    Strdelete(strBuf, CPos, delta);
    CLen -= delta;
}

static void
_mvL(void)
{
    if (CPos > 0)
	CPos--;
#ifdef JP_CHARSET
    if (strProp[CPos] == PC_KANJI2)
	CPos--;
#endif				/* JP_CHARSET */
}

static void
_mvLw(void)
{
    int first = 1;
    while (CPos > 0 && (first || !terminated(strBuf->ptr[CPos - 1]))) {
	CPos--;
	first = 0;
#ifdef JP_CHARSET
	if (strProp[CPos] == PC_KANJI2)
	    CPos--;
#endif				/* JP_CHARSET */
	if (!move_word)
	    break;
    }
}

static void
_mvRw(void)
{
    int first = 1;
    while (CPos < CLen && (first || !terminated(strBuf->ptr[CPos - 1]))) {
	CPos++;
	first = 0;
#ifdef JP_CHARSET
	if (strProp[CPos] == PC_KANJI2)
	    CPos++;
#endif				/* JP_CHARSET */
	if (!move_word)
	    break;
    }
}

static void
_mvR(void)
{
    if (CPos < CLen)
	CPos++;
#ifdef JP_CHARSET
    if (strProp[CPos] == PC_KANJI2)
	CPos++;
#endif				/* JP_CHARSET */
}

static void
_bs(void)
{
    if (CPos > 0) {
	_mvL();
	delC();
    }
}

static void
_bsw(void)
{
    int t = 0;
    while (CPos > 0 && !t) {
	_mvL();
	t = (move_word && terminated(strBuf->ptr[CPos - 1]));
	delC();
    }
}

static void
_enter(void)
{
    i_cont = FALSE;
}

static void
insertself(char c)
{
    if (CLen >= STR_LEN)
	return;
    insC();
    strBuf->ptr[CPos] = c;
    strProp[CPos] = (is_passwd) ? PC_ASCII : PC_CTRL;
    CPos++;
}

static void
_quo(void)
{
    i_quote = TRUE;
}

static void
_mvB(void)
{
    CPos = 0;
}

static void
_mvE(void)
{
    CPos = CLen;
}

static void
killn(void)
{
    CLen = CPos;
    Strtruncate(strBuf, CLen);
}

static void
killb(void)
{
    while (CPos > 0)
	_bs();
}

static void
_inbrk(void)
{
    i_cont = FALSE;
    i_broken = TRUE;
}

static void
_compl(void)
{
    next_compl(1);
}

static void
_rcompl(void)
{
    next_compl(-1);
}

static void
_tcompl(void)
{
    if (cm_mode & CPL_OFF)
	cm_mode = CPL_ON;
    else if (cm_mode & CPL_ON)
	cm_mode = CPL_OFF;
}

static void
next_compl(int next)
{
    int status;
    int b, a;
    Str buf;
    Str s;

    if (cm_mode == CPL_NEVER || cm_mode & CPL_OFF)
	return;
    cm_clear = FALSE;
    if (!cm_next) {
	for (b = CPos - 1; b >= 0; b--) {
	    if (strBuf->ptr[b] == ' ' || strBuf->ptr[b] == CTRL_I)
		break;
	}
	b++;
	a = CPos;
	CBeforeBuf = Strsubstr(strBuf, 0, b);
	buf = Strsubstr(strBuf, b, a - b);
	CAfterBuf = Strsubstr(strBuf, a, strBuf->length - a);
	s = doComplete(buf, &status, next);
    }
    else {
	s = doComplete(strBuf, &status, next);
    }
    if (next == 0)
	return;

    if (status != CPL_OK && status != CPL_MENU)
	bell();
    if (status == CPL_FAIL)
	return;

    strBuf = Strnew_m_charp(CBeforeBuf->ptr, s->ptr, CAfterBuf->ptr, NULL);
    CLen = setStrType(strBuf, strProp);
    CPos = CBeforeBuf->length + s->length;
    if (CPos > CLen)
	CPos = CLen;
}

static void
_dcompl(void)
{
    next_dcompl(1);
}

static void
_rdcompl(void)
{
    next_dcompl(-1);
}

static void
next_dcompl(int next)
{
    static int col, row, len;
    static Str d;
    int i, j, n, y;
    Str f;
    char *p;
    struct stat st;
    int comment, nline;

    if (cm_mode == CPL_NEVER || cm_mode & CPL_OFF)
	return;
    cm_disp_clear = FALSE;
    displayBuffer(Currentbuf, B_FORCE_REDRAW);

    if (LASTLINE >= 3) {
	comment = TRUE;
	nline = LASTLINE - 2;
    }
    else if (LASTLINE) {
	comment = FALSE;
	nline = LASTLINE;
    }
    else {
	return;
    }
    if (cm_disp_next >= 0) {
	if (next == 1) {
	    cm_disp_next += col * nline;
	    if (cm_disp_next >= NCFileBuf)
		cm_disp_next = 0;
	}
	else if (next == -1) {
	    cm_disp_next -= col * nline;
	    if (cm_disp_next < 0)
		cm_disp_next = 0;
	}
	row = (NCFileBuf - cm_disp_next + col - 1) / col;
	goto disp_next;
    }

    cm_next = FALSE;
    next_compl(0);
    if (NCFileBuf == 0)
	return;
    cm_disp_next = 0;

    d = Str_conv_to_system(Strdup(CDirBuf));
    if (d->length > 0 && Strlastchar(d) != '/')
	Strcat_char(d, '/');
    if (cm_mode & CPL_URL && d->ptr[0] == 'f') {
	p = d->ptr;
	if (strncmp(p, "file://localhost/", 17) == 0)
	    p = &p[16];
	else if (strncmp(p, "file:///", 8) == 0)
	    p = &p[7];
	else if (strncmp(p, "file:/", 6) == 0 && p[6] != '/')
	    p = &p[5];
	d = Strnew_charp(p);
    }

    len = 0;
    for (i = 0; i < NCFileBuf; i++) {
	n = strlen(CFileBuf[i]) + 3;
	if (len < n)
	    len = n;
    }
    col = COLS / len;
    if (col == 0)
	col = 1;
    row = (NCFileBuf + col - 1) / col;

  disp_next:
    if (comment) {
	if (row > nline) {
	    row = nline;
	    y = 0;
	}
	else
	    y = nline - row + 1;
    }
    else {
	if (row >= nline) {
	    row = nline;
	    y = 0;
	}
	else
	    y = nline - row - 1;
    }
    if (y) {
	move(y - 1, 0);
	clrtoeolx();
    }
    if (comment) {
	move(y, 0);
	clrtoeolx();
	bold();
	addstr("----- Completion list -----");
	boldend();
	y++;
    }
    for (i = 0; i < row; i++) {
	for (j = 0; j < col; j++) {
	    n = cm_disp_next + j * row + i;
	    if (n >= NCFileBuf)
		break;
	    move(y, j * len);
	    clrtoeolx();
	    f = Strdup(d);
	    Strcat_charp(f, CFileBuf[n]);
	    addstr(conv_from_system(CFileBuf[n]));
	    if (stat(expandName(f->ptr), &st) != -1 && S_ISDIR(st.st_mode))
		addstr("/");
	}
	y++;
    }
    if (comment && y == LASTLINE - 1) {
	move(y, 0);
	clrtoeolx();
	bold();
#ifdef EMACS_LIKE_LINEEDIT
	if (emacs_like_lineedit)
	    addstr("----- Press TAB to continue -----");
	else
#else
	addstr("----- Press CTRL-D to continue -----");
#endif
	boldend();
    }
}

static Str
doComplete(Str ifn, int *status, int next)
{
    int fl, i;
    char *fn, *p;
    DIR *d;
    Directory *dir;
    struct stat st;

    if (!cm_next) {
	NCFileBuf = 0;
	ifn = Str_conv_to_system(ifn);
	CompleteBuf = Strdup(ifn);
	while (Strlastchar(CompleteBuf) != '/' && CompleteBuf->length > 0)
	    Strshrink(CompleteBuf, 1);
	CDirBuf = Strdup(CompleteBuf);
	if (cm_mode & CPL_URL) {
	    if (strncmp(CompleteBuf->ptr, "file://localhost/", 17) == 0)
		Strdelete(CompleteBuf, 0, 16);
	    else if (strncmp(CompleteBuf->ptr, "file:///", 8) == 0)
		Strdelete(CompleteBuf, 0, 7);
	    else if (strncmp(CompleteBuf->ptr, "file:/", 6) == 0 &&
		     CompleteBuf->ptr[6] != '/')
		Strdelete(CompleteBuf, 0, 5);
	    else {
		CompleteBuf = Strdup(ifn);
		*status = CPL_FAIL;
		return Str_conv_to_system(CompleteBuf);
	    }
	}
	if (CompleteBuf->length == 0) {
	    Strcat_char(CompleteBuf, '.');
	}
	if (Strlastchar(CompleteBuf) == '/' && CompleteBuf->length > 1) {
	    Strshrink(CompleteBuf, 1);
	}
	if ((d = opendir(expandName(CompleteBuf->ptr))) == NULL) {
	    CompleteBuf = Strdup(ifn);
	    *status = CPL_FAIL;
	    return CompleteBuf;
	}
	fn = lastFileName(ifn->ptr);
	fl = strlen(fn);
	CFileName = Strnew();
	for (;;) {
	    dir = readdir(d);
	    if (dir == NULL)
		break;
	    if (fl == 0
		&& (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, "..")))
		continue;
	    if (!strncmp(dir->d_name, fn, fl)) {	/* match */
		NCFileBuf++;
		CFileBuf = New_Reuse(char *, CFileBuf, NCFileBuf);
		CFileBuf[NCFileBuf - 1] =
		    NewAtom_N(char, strlen(dir->d_name) + 1);
		strcpy(CFileBuf[NCFileBuf - 1], dir->d_name);
		if (NCFileBuf == 1) {
		    CFileName = Strnew_charp(dir->d_name);
		}
		else {
		    for (i = 0; CFileName->ptr[i] == dir->d_name[i]; i++) ;
		    Strtruncate(CFileName, i);
		}
	    }
	}
	closedir(d);
	if (NCFileBuf == 0) {
	    CompleteBuf = Strdup(ifn);
	    *status = CPL_FAIL;
	    return CompleteBuf;
	}
	qsort(CFileBuf, NCFileBuf, sizeof(CFileBuf[0]), strCmp);
	NCFileOffset = 0;
	if (NCFileBuf >= 2) {
	    cm_next = TRUE;
	    *status = CPL_AMBIG;
	}
	else {
	    *status = CPL_OK;
	}
    }
    else {
	CFileName = Strnew_charp(CFileBuf[NCFileOffset]);
	NCFileOffset = (NCFileOffset + next + NCFileBuf) % NCFileBuf;
	*status = CPL_MENU;
    }
    CompleteBuf = Strdup(CDirBuf);
    if (CompleteBuf->length == 0)
	Strcat(CompleteBuf, CFileName);
    else if (Strlastchar(CompleteBuf) == '/')
	Strcat(CompleteBuf, CFileName);
    else {
	Strcat_char(CompleteBuf, '/');
	Strcat(CompleteBuf, CFileName);
    }
    if (*status != CPL_AMBIG) {
	p = CompleteBuf->ptr;
	if (cm_mode & CPL_URL) {
	    if (strncmp(p, "file://localhost/", 17) == 0)
		p = &p[16];
	    else if (strncmp(p, "file:///", 8) == 0)
		p = &p[7];
	    else if (strncmp(p, "file:/", 6) == 0 && p[6] != '/')
		p = &p[5];
	}
	if (stat(expandName(p), &st) != -1 && S_ISDIR(st.st_mode))
	    Strcat_char(CompleteBuf, '/');
    }
    return Str_conv_from_system(CompleteBuf);
}

static void
_prev(void)
{
    Hist *hist = CurrentHist;
    char *p;

    if (!use_hist)
	return;
    if (strCurrentBuf) {
	p = prevHist(hist);
	if (p == NULL)
	    return;
    }
    else {
	p = lastHist(hist);
	if (p == NULL)
	    return;
	strCurrentBuf = strBuf;
    }
    strBuf = Strnew_charp(p);
    CLen = CPos = setStrType(strBuf, strProp);
    offset = 0;
}

static void
_next(void)
{
    Hist *hist = CurrentHist;
    char *p;

    if (!use_hist)
	return;
    if (strCurrentBuf == NULL)
	return;
    p = nextHist(hist);
    if (p) {
	strBuf = Strnew_charp(p);
    }
    else {
	strBuf = strCurrentBuf;
	strCurrentBuf = NULL;
    }
    CLen = CPos = setStrType(strBuf, strProp);
    offset = 0;
}

static int
setStrType(Str str, Lineprop *prop)
{
    Lineprop ctype;
    int i = 0, delta;
    char *s = str->ptr;

    for (; *s != '\0' && i < STR_LEN; s += delta, i += delta) {
	ctype = get_mctype(s);
	if (is_passwd && ctype & PC_CTRL)
	    ctype = PC_ASCII;
	delta = get_mclen(ctype);
#ifdef JP_CHARSET
	if (ctype == PC_KANJI) {
	    prop[i] = PC_KANJI1;
	    prop[i + 1] = PC_KANJI2;
	}
	else
#endif
	    prop[i] = ctype;
    }
    return i;
}

static int
terminated(unsigned char c)
{
    int termchar[] = { '/', '&', '?', -1 };
    int *tp;

    for (tp = termchar; *tp > 0; tp++) {
	if (c == *tp) {
	    return 1;
	}
    }

    return 0;
}