/* re_addc():
* Draw c, expanding tabs, control chars etc.
*/
static void
re_addc(EditLine *el, wint_t c)
{
switch (ct_chr_class(c)) {
case CHTYPE_TAB: /* expand the tab */
for (;;) {
re_putc(el, ' ', 1);
if ((el->el_refresh.r_cursor.h & 07) == 0)
break; /* go until tab stop */
}
break;
case CHTYPE_NL: {
int oldv = el->el_refresh.r_cursor.v;
re_putc(el, '\0', 0); /* assure end of line */
if (oldv == el->el_refresh.r_cursor.v) /* XXX */
re_nextline(el);
break;
}
case CHTYPE_PRINT:
re_putc(el, c, 1);
break;
default: {
wchar_t visbuf[VISUAL_WIDTH_MAX];
ssize_t i, n =
ct_visual_char(visbuf, VISUAL_WIDTH_MAX, c);
for (i = 0; n-- > 0; ++i)
re_putc(el, visbuf[i], 1);
break;
}
}
}
libedit_private const wchar_t *
ct_visual_string(const wchar_t *s, ct_buffer_t *conv)
{
wchar_t *dst;
ssize_t used;
if (!s)
return NULL;
if (ct_conv_wbuff_resize(conv, CT_BUFSIZ) == -1)
return NULL;
used = 0;
dst = conv->wbuff;
while (*s) {
used = ct_visual_char(dst,
conv->wsize - (size_t)(dst - conv->wbuff), *s);
if (used != -1) {
++s;
dst += used;
continue;
}
/* failed to encode, need more buffer space */
used = dst - conv->wbuff;
if (ct_conv_wbuff_resize(conv, conv->wsize + CT_BUFSIZ) == -1)
return NULL;
dst = conv->wbuff + used;
}
if (dst >= (conv->wbuff + conv->wsize)) { /* sigh */
used = dst - conv->wbuff;
if (ct_conv_wbuff_resize(conv, conv->wsize + CT_BUFSIZ) == -1)
return NULL;
dst = conv->wbuff + used;
}
*dst = L'\0';
return conv->wbuff;
}