static void
FcitxThaiGetPrevCell(FcitxThai* thai, struct thcell_t* res)
{
th_init_cell(res);
if (is_client_support_surrounding(IBUS_ENGINE(libthai_engine))) {
IBusText* surrounding;
guint cursor_pos;
guint anchor_pos;
const gchar* s;
gchar* tis_text = NULL;
ibus_engine_get_surrounding_text(IBUS_ENGINE(libthai_engine),
&surrounding, &cursor_pos, &anchor_pos);
s = ibus_text_get_text(surrounding);
cursor_pos = g_utf8_offset_to_pointer(s, cursor_pos) - s;
while (*s) {
const gchar* t;
tis_text = g_convert(s, cursor_pos, "TIS-620", "UTF-8",
NULL, NULL, NULL);
if (tis_text)
break;
t = g_utf8_next_char(s);
cursor_pos -= (t - s);
s = t;
}
if (tis_text) {
gint char_index;
char_index = g_utf8_pointer_to_offset(s, s + cursor_pos);
th_prev_cell((thchar_t*) tis_text, char_index, res, TRUE);
g_free(tis_text);
}
} else {
/* retrieve from the fallback buffer */
th_prev_cell(libthai_engine->char_buff, libthai_engine->buff_tail,
res, TRUE);
}
}
thcell_t
ThaiInstance::_get_previous_cell ()
{
WideString surrounding;
int cursor_index;
thcell_t the_cell;
th_init_cell (&the_cell);
if (get_surrounding_text (surrounding, cursor_index))
{
thchar_t* tis_text = new thchar_t [cursor_index+1];
if (!tis_text)
goto exit_point;
tis_text [cursor_index] = '\0';
int begin_index = cursor_index;
while (begin_index > 0)
{
thchar_t c = th_uni2tis (surrounding [begin_index-1]);
if (c == THCHAR_ERR)
break;
tis_text [--begin_index] = c;
}
if (begin_index < cursor_index)
{
th_prev_cell (tis_text + begin_index, cursor_index - begin_index,
&the_cell, true);
}
delete tis_text;
}
else
{
th_prev_cell (m_char_buff, m_buff_tail, &the_cell, true);
}
exit_point:
return the_cell;
}