1/*	$NetBSD: prompt.c,v 1.20 2011/07/29 15:16:33 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
38static char sccsid[] = "@(#)prompt.c	8.1 (Berkeley) 6/4/93";
39#else
40__RCSID("$NetBSD: prompt.c,v 1.20 2011/07/29 15:16:33 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
50private Char	*prompt_default(EditLine *);
51private Char	*prompt_default_r(EditLine *);
52
53/* prompt_default():
54 *	Just a default prompt, in case the user did not provide one
55 */
56private Char *
57/*ARGSUSED*/
58prompt_default(EditLine *el __attribute__((__unused__)))
59{
60	static Char a[3] = {'?', ' ', '\0'};
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 */
69private Char *
70/*ARGSUSED*/
71prompt_default_r(EditLine *el __attribute__((__unused__)))
72{
73	static Char a[1] = {'\0'};
74
75	return a;
76}
77
78
79/* prompt_print():
80 *	Print the prompt and update the prompt position.
81 */
82protected void
83prompt_print(EditLine *el, int op)
84{
85	el_prompt_t *elp;
86	Char *p;
87	int ignore = 0;
88
89	if (op == EL_PROMPT)
90		elp = &el->el_prompt;
91	else
92		elp = &el->el_rprompt;
93
94	if (elp->p_wide)
95		p = (*elp->p_func)(el);
96	else
97		p = ct_decode_string((char *)(void *)(*elp->p_func)(el),
98		    &el->el_scratch);
99
100	for (; *p; p++) {
101		if (elp->p_ignore == *p) {
102			ignore = !ignore;
103			continue;
104		}
105		if (ignore)
106			terminal__putc(el, *p);
107		else
108			re_putc(el, *p, 1);
109	}
110
111	elp->p_pos.v = el->el_refresh.r_cursor.v;
112	elp->p_pos.h = el->el_refresh.r_cursor.h;
113}
114
115
116/* prompt_init():
117 *	Initialize the prompt stuff
118 */
119protected int
120prompt_init(EditLine *el)
121{
122
123	el->el_prompt.p_func = prompt_default;
124	el->el_prompt.p_pos.v = 0;
125	el->el_prompt.p_pos.h = 0;
126	el->el_prompt.p_ignore = '\0';
127	el->el_rprompt.p_func = prompt_default_r;
128	el->el_rprompt.p_pos.v = 0;
129	el->el_rprompt.p_pos.h = 0;
130	el->el_rprompt.p_ignore = '\0';
131	return 0;
132}
133
134
135/* prompt_end():
136 *	Clean up the prompt stuff
137 */
138protected void
139/*ARGSUSED*/
140prompt_end(EditLine *el __attribute__((__unused__)))
141{
142}
143
144
145/* prompt_set():
146 *	Install a prompt printing function
147 */
148protected int
149prompt_set(EditLine *el, el_pfunc_t prf, Char c, int op, int wide)
150{
151	el_prompt_t *p;
152
153	if (op == EL_PROMPT || op == EL_PROMPT_ESC)
154		p = &el->el_prompt;
155	else
156		p = &el->el_rprompt;
157
158	if (prf == NULL) {
159		if (op == EL_PROMPT || op == EL_PROMPT_ESC)
160			p->p_func = prompt_default;
161		else
162			p->p_func = prompt_default_r;
163	} else {
164		p->p_func = prf;
165	}
166
167	p->p_ignore = c;
168
169	p->p_pos.v = 0;
170	p->p_pos.h = 0;
171	p->p_wide = wide;
172
173	return 0;
174}
175
176
177/* prompt_get():
178 *	Retrieve the prompt printing function
179 */
180protected int
181prompt_get(EditLine *el, el_pfunc_t *prf, Char *c, int op)
182{
183	el_prompt_t *p;
184
185	if (prf == NULL)
186		return -1;
187
188	if (op == EL_PROMPT)
189		p = &el->el_prompt;
190	else
191		p = &el->el_rprompt;
192
193	if (prf)
194		*prf = p->p_func;
195	if (c)
196		*c = p->p_ignore;
197
198	return 0;
199}
200