Home | History | Annotate | Line # | Download | only in libedit 
      1 /*	$NetBSD: prompt.c,v 1.27 2017/06/27 23:25:13 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1992, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * Christos Zoulas of Cornell University.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. Neither the name of the University nor the names of its contributors
     19  *    may be used to endorse or promote products derived from this software
     20  *    without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  */
     34 
     35 #include "config.h"
     36 #if !defined(lint) && !defined(SCCSID)
     37 #if 0
     38 static char sccsid[] = "@(#)prompt.c	8.1 (Berkeley) 6/4/93";
     39 #else
     40 __RCSID("$NetBSD: prompt.c,v 1.27 2017/06/27 23:25:13 christos Exp $");
     41 #endif
     42 #endif /* not lint && not SCCSID */
     43 
     44 /*
     45  * prompt.c: Prompt printing functions
     46  */
     47 #include <stdio.h>
     48 #include "el.h"
     49 
     50 static wchar_t	*prompt_default(EditLine *);
     51 static wchar_t	*prompt_default_r(EditLine *);
     52 
     53 /* prompt_default():
     54  *	Just a default prompt, in case the user did not provide one
     55  */
     56 static wchar_t *
     57 /*ARGSUSED*/
     58 prompt_default(EditLine *el __attribute__((__unused__)))
     59 {
     60 	static wchar_t a[3] = L"? ";
     61 
     62 	return a;
     63 }
     64 
     65 
     66 /* prompt_default_r():
     67  *	Just a default rprompt, in case the user did not provide one
     68  */
     69 static wchar_t *
     70 /*ARGSUSED*/
     71 prompt_default_r(EditLine *el __attribute__((__unused__)))
     72 {
     73 	static wchar_t a[1] = L"";
     74 
     75 	return a;
     76 }
     77 
     78 
     79 /* prompt_print():
     80  *	Print the prompt and update the prompt position.
     81  */
     82 libedit_private void
     83 prompt_print(EditLine *el, int op)
     84 {
     85 	el_prompt_t *elp;
     86 	wchar_t *p;
     87 
     88 	if (op == EL_PROMPT)
     89 		elp = &el->el_prompt;
     90 	else
     91 		elp = &el->el_rprompt;
     92 
     93 	if (elp->p_wide)
     94 		p = (*elp->p_func)(el);
     95 	else
     96 		p = ct_decode_string((char *)(void *)(*elp->p_func)(el),
     97 		    &el->el_scratch);
     98 
     99 	for (; *p; p++) {
    100 		if (elp->p_ignore == *p) {
    101 			wchar_t *litstart = ++p;
    102 			while (*p && *p != elp->p_ignore)
    103 				p++;
    104 			if (!*p || !p[1]) {
    105 				// XXX: We lose the last literal
    106 				break;
    107 			}
    108 			re_putliteral(el, litstart, p++);
    109 			continue;
    110 		}
    111 		re_putc(el, *p, 1);
    112 	}
    113 
    114 	elp->p_pos.v = el->el_refresh.r_cursor.v;
    115 	elp->p_pos.h = el->el_refresh.r_cursor.h;
    116 }
    117 
    118 
    119 /* prompt_init():
    120  *	Initialize the prompt stuff
    121  */
    122 libedit_private int
    123 prompt_init(EditLine *el)
    124 {
    125 
    126 	el->el_prompt.p_func = prompt_default;
    127 	el->el_prompt.p_pos.v = 0;
    128 	el->el_prompt.p_pos.h = 0;
    129 	el->el_prompt.p_ignore = '\0';
    130 	el->el_rprompt.p_func = prompt_default_r;
    131 	el->el_rprompt.p_pos.v = 0;
    132 	el->el_rprompt.p_pos.h = 0;
    133 	el->el_rprompt.p_ignore = '\0';
    134 	return 0;
    135 }
    136 
    137 
    138 /* prompt_end():
    139  *	Clean up the prompt stuff
    140  */
    141 libedit_private void
    142 /*ARGSUSED*/
    143 prompt_end(EditLine *el __attribute__((__unused__)))
    144 {
    145 }
    146 
    147 
    148 /* prompt_set():
    149  *	Install a prompt printing function
    150  */
    151 libedit_private int
    152 prompt_set(EditLine *el, el_pfunc_t prf, wchar_t c, int op, int wide)
    153 {
    154 	el_prompt_t *p;
    155 
    156 	if (op == EL_PROMPT || op == EL_PROMPT_ESC)
    157 		p = &el->el_prompt;
    158 	else
    159 		p = &el->el_rprompt;
    160 
    161 	if (prf == NULL) {
    162 		if (op == EL_PROMPT || op == EL_PROMPT_ESC)
    163 			p->p_func = prompt_default;
    164 		else
    165 			p->p_func = prompt_default_r;
    166 	} else {
    167 		p->p_func = prf;
    168 	}
    169 
    170 	p->p_ignore = c;
    171 
    172 	p->p_pos.v = 0;
    173 	p->p_pos.h = 0;
    174 	p->p_wide = wide;
    175 
    176 	return 0;
    177 }
    178 
    179 
    180 /* prompt_get():
    181  *	Retrieve the prompt printing function
    182  */
    183 libedit_private int
    184 prompt_get(EditLine *el, el_pfunc_t *prf, wchar_t *c, int op)
    185 {
    186 	el_prompt_t *p;
    187 
    188 	if (prf == NULL)
    189 		return -1;
    190 
    191 	if (op == EL_PROMPT)
    192 		p = &el->el_prompt;
    193 	else
    194 		p = &el->el_rprompt;
    195 
    196 	if (prf)
    197 		*prf = p->p_func;
    198 	if (c)
    199 		*c = p->p_ignore;
    200 
    201 	return 0;
    202 }
    203