1/****************************************************************************
2 * Copyright (c) 1998-2005,2007 Free Software Foundation, Inc.              *
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14 *                                                                          *
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28
29/****************************************************************************
30 *  Author: Juergen Pfeifer                                                 *
31 *     and: Thomas E. Dickey                                                *
32 ****************************************************************************/
33
34/*
35 *	lib_slkset.c
36 *      Set soft label text.
37 */
38#include <curses.priv.h>
39#include <ctype.h>
40
41#if USE_WIDEC_SUPPORT
42#if HAVE_WCTYPE_H
43#include <wctype.h>
44#endif
45#endif
46
47MODULE_ID("$Id: lib_slkset.c,v 1.17 2007/10/13 20:08:46 tom Exp $")
48
49NCURSES_EXPORT(int)
50slk_set(int i, const char *astr, int format)
51{
52    SLK *slk;
53    int offset;
54    int numchrs;
55    int numcols;
56    int limit;
57    const char *str = astr;
58    const char *p;
59
60    T((T_CALLED("slk_set(%d, \"%s\", %d)"), i, str, format));
61
62    if (SP == 0
63	|| (slk = SP->_slk) == 0
64	|| i < 1
65	|| i > slk->labcnt
66	|| format < 0
67	|| format > 2)
68	returnCode(ERR);
69    if (str == NULL)
70	str = "";
71    --i;			/* Adjust numbering of labels */
72
73    limit = MAX_SKEY_LEN(SP->slk_format);
74    while (isspace(UChar(*str)))
75	str++;			/* skip over leading spaces  */
76    p = str;
77
78#if USE_WIDEC_SUPPORT
79    numcols = 0;
80    while (*p != 0) {
81	mbstate_t state;
82	wchar_t wc;
83	size_t need;
84
85	init_mb(state);
86	need = mbrtowc(0, p, strlen(p), &state);
87	if (need == (size_t) -1)
88	    break;
89	mbrtowc(&wc, p, need, &state);
90	if (!iswprint((wint_t) wc))
91	    break;
92	if (wcwidth(wc) + numcols > limit)
93	    break;
94	numcols += wcwidth(wc);
95	p += need;
96    }
97    numchrs = (p - str);
98#else
99    while (isprint(UChar(*p)))
100	p++;			/* The first non-print stops */
101
102    numcols = (p - str);
103    if (numcols > limit)
104	numcols = limit;
105    numchrs = numcols;
106#endif
107
108    FreeIfNeeded(slk->ent[i].ent_text);
109    if ((slk->ent[i].ent_text = strdup(str)) == 0)
110	returnCode(ERR);
111    slk->ent[i].ent_text[numchrs] = '\0';
112
113    if ((slk->ent[i].form_text = (char *) _nc_doalloc(slk->ent[i].form_text,
114						      (unsigned) (limit +
115								  numchrs + 1))
116	) == 0)
117	returnCode(ERR);
118
119    switch (format) {
120    default:
121    case 0:			/* left-justified */
122	offset = 0;
123	break;
124    case 1:			/* centered */
125	offset = (limit - numcols) / 2;
126	break;
127    case 2:			/* right-justified */
128	offset = limit - numcols;
129	break;
130    }
131    if (offset <= 0)
132	offset = 0;
133    else
134	memset(slk->ent[i].form_text, ' ', (unsigned) offset);
135
136    memcpy(slk->ent[i].form_text + offset,
137	   slk->ent[i].ent_text,
138	   (unsigned) numchrs);
139
140    if (offset < limit) {
141	memset(slk->ent[i].form_text + offset + numchrs,
142	       ' ',
143	       (unsigned) (limit - (offset + numcols)));
144    }
145
146    slk->ent[i].form_text[numchrs - numcols + limit] = 0;
147    slk->ent[i].dirty = TRUE;
148    returnCode(OK);
149}
150