481683c847a8f490820a8b6b7991a3e045c45d21
1 /* ncmpc (Ncurses MPD Client)
2 * (c) 2004-2009 The Music Player Daemon Project
3 * Project homepage: http://musicpd.org
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
20 #include "hscroll.h"
21 #include "charset.h"
23 #include <assert.h>
24 #include <string.h>
26 char *
27 strscroll(struct hscroll *hscroll, const char *str, const char *separator,
28 unsigned width)
29 {
30 gchar *tmp, *buf;
31 gsize len, size;
33 assert(hscroll != NULL);
34 assert(str != NULL);
35 assert(separator != NULL);
37 if (hscroll->offset == 0)
38 return g_strdup(str);
40 /* create a buffer containing the string and the separator */
41 tmp = g_strconcat(str, separator, NULL);
42 len = utf8_width(tmp);
44 if (hscroll->offset >= len)
45 hscroll->offset = 0;
47 /* create the new scrolled string */
48 size = width+1;
49 if (g_utf8_validate(tmp, -1, NULL) ) {
50 size_t ulen;
51 buf = g_malloc(size*6);// max length of utf8 char is 6
52 g_utf8_strncpy(buf, g_utf8_offset_to_pointer(tmp, hscroll->offset), size);
53 if( (ulen = g_utf8_strlen(buf, -1)) < width )
54 g_utf8_strncpy(buf+strlen(buf), tmp, size - ulen - 1);
55 } else {
56 buf = g_malloc(size);
57 g_strlcpy(buf, tmp + hscroll->offset, size);
58 if (strlen(buf) < (size_t)width)
59 g_strlcat(buf, tmp, size);
60 }
62 g_free(tmp);
63 return buf;
64 }