static gunichar
lx_tn_engine_get_prev_surrounding_char (LxTNEngine *lx_tn_engine,
IBusEngine *ibus_engine)
{
if (is_client_support_surrounding (ibus_engine))
{
IBusText *surrounding;
guint cursor_pos;
guint anchor_pos;
gunichar *u_surrounding;
gunichar ret = 0;
ibus_engine_get_surrounding_text (ibus_engine,
&surrounding, &cursor_pos, &anchor_pos);
u_surrounding = g_utf8_to_ucs4 (ibus_text_get_text (surrounding), -1,
NULL, NULL, NULL);
if (u_surrounding)
{
ret = (cursor_pos > 0) ? u_surrounding[cursor_pos - 1] : 0;
g_free (u_surrounding);
}
return ret;
}
return 0;
}
static gboolean
lx_tn_engine_convert_seq (LxTNEngine *lx_tn_engine,
IBusEngine *ibus_engine,
gunichar input_char)
{
if (is_client_support_surrounding (ibus_engine))
{
IBusText *surrounding;
guint cursor_pos;
guint anchor_pos;
LxTNConv conv;
ibus_engine_get_surrounding_text (ibus_engine,
&surrounding, &cursor_pos, &anchor_pos);
if (lx_tn_im_conversion (ibus_text_get_text (surrounding),
cursor_pos, anchor_pos, input_char, &conv))
{
IBusText *text;
ibus_engine_delete_surrounding_text (ibus_engine,
conv.del_offset,
-conv.del_offset);
text = ibus_text_new_from_static_string (conv.commit_text);
ibus_engine_commit_text (ibus_engine, text);
return TRUE;
}
}
return FALSE;
}
static gchar*
h_ibus_text_get_substring (IBusText* ibus_text, glong p1, glong p2)
{
const gchar* text;
const gchar* begin;
const gchar* end;
gchar* substring;
glong limit;
glong pos;
glong n;
text = ibus_text_get_text (ibus_text);
limit = ibus_text_get_length (ibus_text) + 1;
if (text == NULL || limit == 0)
return NULL;
p1 = MAX(0, p1);
p2 = MAX(0, p2);
pos = MIN(p1, p2);
n = ABS(p2 - p1);
if (pos + n > limit)
n = limit - pos;
begin = g_utf8_offset_to_pointer (text, pos);
end = g_utf8_offset_to_pointer (begin, n);
substring = g_strndup (begin, end - begin);
return substring;
}
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);
}
}
