/**
* @ingroup hangulic
* @brief @ref HangulInputContext가 backspace 키를 처리하도록 하는 함수
* @param hic @ref HangulInputContext를 가리키는 포인터
* @return @a hic가 키를 사용했으면 true, 사용하지 않았으면 false
*
* 이 함수는 @a hic가 가리키는 @ref HangulInputContext의 조합중이던 글자를
* 뒤에서부터 하나 지우는 기능을 한다. backspace 키를 눌렀을 때 발생하는
* 동작을 한다. 따라서 이 함수를 부르고 나면 preedit string이 바뀌므로
* 반드시 업데이트를 해야 한다.
*
* @remarks 이 함수는 @ref HangulInputContext의 상태를 변화 시킨다.
*/
bool
hangul_ic_backspace(HangulInputContext *hic)
{
int ret;
if (hic == NULL)
return false;
hic->preedit_string[0] = 0;
hic->commit_string[0] = 0;
ret = hangul_buffer_backspace(&hic->buffer);
if (ret)
hangul_ic_save_preedit_string(hic);
return ret;
}
static bool
hangul_ic_process_romaja(HangulInputContext *hic, int ascii, ucschar ch)
{
ucschar jong;
ucschar combined;
if (!hangul_is_jamo(ch) && ch > 0) {
hangul_ic_save_commit_string(hic);
hangul_ic_append_commit_string(hic, ch);
return true;
}
if (isupper(ascii)) {
hangul_ic_save_commit_string(hic);
}
if (hic->buffer.jongseong) {
if (ascii == 'x' || ascii == 'X') {
ch = 0x110c;
hangul_ic_save_commit_string(hic);
if (!hangul_ic_push(hic, ch)) {
return false;
}
} else if (hangul_is_choseong(ch) || hangul_is_jongseong(ch)) {
if (hangul_is_jongseong(ch))
jong = ch;
else
jong = hangul_choseong_to_jongseong(ch);
combined = hangul_combination_combine(hic->combination,
hic->buffer.jongseong, jong);
if (hangul_is_jongseong(combined)) {
if (!hangul_ic_push(hic, combined)) {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else {
hangul_ic_save_commit_string(hic);
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else if (hangul_is_jungseong(ch)) {
if (hic->buffer.jongseong == 0x11bc) {
hangul_ic_save_commit_string(hic);
hic->buffer.choseong = 0x110b;
hangul_ic_push(hic, ch);
} else {
ucschar pop, peek;
pop = hangul_ic_pop(hic);
peek = hangul_ic_peek(hic);
if (hangul_is_jungseong(peek)) {
if (pop == 0x11aa) {
hic->buffer.jongseong = 0x11a8;
} else {
hic->buffer.jongseong = 0;
}
hangul_ic_save_commit_string(hic);
hangul_ic_push(hic, hangul_jongseong_to_choseong(pop));
if (!hangul_ic_push(hic, ch)) {
return false;
}
} else {
ucschar choseong = 0, jongseong = 0;
hangul_jongseong_dicompose(hic->buffer.jongseong,
&jongseong, &choseong);
hic->buffer.jongseong = jongseong;
hangul_ic_save_commit_string(hic);
hangul_ic_push(hic, choseong);
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
}
} else {
goto flush;
}
} else if (hic->buffer.jungseong) {
if (hangul_is_choseong(ch)) {
if (hic->buffer.choseong) {
jong = hangul_choseong_to_jongseong(ch);
if (hangul_is_jongseong(jong)) {
if (!hangul_ic_push(hic, jong)) {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else {
hangul_ic_save_commit_string(hic);
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else {
if (!hangul_ic_push(hic, ch)) {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
}
} else if (hangul_is_jungseong(ch)) {
combined = hangul_combination_combine(hic->combination,
hic->buffer.jungseong, ch);
if (hangul_is_jungseong(combined)) {
if (!hangul_ic_push(hic, combined)) {
return false;
}
} else {
hangul_ic_save_commit_string(hic);
hic->buffer.choseong = 0x110b;
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else if (hangul_is_jongseong(ch)) {
if (!hangul_ic_push(hic, ch)) {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else {
goto flush;
}
} else if (hic->buffer.choseong) {
if (hangul_is_choseong(ch)) {
combined = hangul_combination_combine(hic->combination,
hic->buffer.choseong, ch);
if (combined == 0) {
hic->buffer.jungseong = 0x1173;
hangul_ic_flush_internal(hic);
if (!hangul_ic_push(hic, ch)) {
return false;
}
} else {
if (!hangul_ic_push(hic, combined)) {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
}
} else if (hangul_is_jongseong(ch)) {
hic->buffer.jungseong = 0x1173;
hangul_ic_save_commit_string(hic);
if (ascii == 'x' || ascii == 'X')
ch = 0x110c;
if (!hangul_ic_push(hic, ch)) {
return false;
}
} else {
if (!hangul_ic_push(hic, ch)) {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
}
} else {
if (ascii == 'x' || ascii == 'X') {
ch = 0x110c;
}
if (!hangul_ic_push(hic, ch)) {
return false;
} else {
if (hic->buffer.choseong == 0 && hic->buffer.jungseong != 0)
hic->buffer.choseong = 0x110b;
}
}
hangul_ic_save_preedit_string(hic);
return true;
flush:
hangul_ic_flush_internal(hic);
return false;
}
static bool
hangul_ic_process_jaso(HangulInputContext *hic, ucschar ch)
{
if (hangul_is_choseong(ch)) {
if (hic->buffer.choseong == 0) {
if (!hangul_ic_push(hic, ch)) {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else {
ucschar choseong = 0;
if (hangul_is_choseong(hangul_ic_peek(hic))) {
choseong = hangul_combination_combine(hic->combination,
hic->buffer.choseong, ch);
}
if (choseong) {
if (!hangul_ic_push(hic, choseong)) {
if (!hangul_ic_push(hic, choseong)) {
return false;
}
}
} else {
hangul_ic_save_commit_string(hic);
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
}
} else if (hangul_is_jungseong(ch)) {
if (hic->buffer.jungseong == 0) {
if (!hangul_ic_push(hic, ch)) {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else {
ucschar jungseong = 0;
if (hangul_is_jungseong(hangul_ic_peek(hic))) {
jungseong = hangul_combination_combine(hic->combination,
hic->buffer.jungseong, ch);
}
if (jungseong) {
if (!hangul_ic_push(hic, jungseong)) {
if (!hangul_ic_push(hic, jungseong)) {
return false;
}
}
} else {
hangul_ic_save_commit_string(hic);
if (!hangul_ic_push(hic, ch)) {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
}
}
} else if (hangul_is_jongseong(ch)) {
if (hic->buffer.jongseong == 0) {
if (!hangul_ic_push(hic, ch)) {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else {
ucschar jongseong = 0;
if (hangul_is_jongseong(hangul_ic_peek(hic))) {
jongseong = hangul_combination_combine(hic->combination,
hic->buffer.jongseong, ch);
}
if (jongseong) {
if (!hangul_ic_push(hic, jongseong)) {
if (!hangul_ic_push(hic, jongseong)) {
return false;
}
}
} else {
hangul_ic_save_commit_string(hic);
if (!hangul_ic_push(hic, ch)) {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
}
}
} else if (ch > 0) {
hangul_ic_save_commit_string(hic);
hangul_ic_append_commit_string(hic, ch);
} else {
hangul_ic_save_commit_string(hic);
return false;
}
hangul_ic_save_preedit_string(hic);
return true;
}
static bool
hangul_ic_process_jamo(HangulInputContext *hic, ucschar ch)
{
ucschar jong;
ucschar combined;
if (!hangul_is_jamo(ch) && ch > 0) {
hangul_ic_save_commit_string(hic);
hangul_ic_append_commit_string(hic, ch);
return true;
}
if (hic->buffer.jongseong) {
if (hangul_is_choseong(ch)) {
jong = hangul_choseong_to_jongseong(ch);
combined = hangul_combination_combine(hic->combination,
hic->buffer.jongseong, jong);
if (hangul_is_jongseong(combined)) {
if (!hangul_ic_push(hic, combined)) {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else {
hangul_ic_save_commit_string(hic);
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else if (hangul_is_jungseong(ch)) {
ucschar pop, peek;
pop = hangul_ic_pop(hic);
peek = hangul_ic_peek(hic);
if (hangul_is_jungseong(peek)) {
hic->buffer.jongseong = 0;
hangul_ic_save_commit_string(hic);
hangul_ic_push(hic, hangul_jongseong_to_choseong(pop));
if (!hangul_ic_push(hic, ch)) {
return false;
}
} else {
ucschar choseong = 0, jongseong = 0;
hangul_jongseong_dicompose(hic->buffer.jongseong,
&jongseong, &choseong);
hic->buffer.jongseong = jongseong;
hangul_ic_save_commit_string(hic);
hangul_ic_push(hic, choseong);
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else {
goto flush;
}
} else if (hic->buffer.jungseong) {
if (hangul_is_choseong(ch)) {
if (hic->buffer.choseong) {
jong = hangul_choseong_to_jongseong(ch);
if (hangul_is_jongseong(jong)) {
if (!hangul_ic_push(hic, jong)) {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else {
hangul_ic_save_commit_string(hic);
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else {
if (!hangul_ic_push(hic, ch)) {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
}
} else if (hangul_is_jungseong(ch)) {
combined = hangul_combination_combine(hic->combination,
hic->buffer.jungseong, ch);
if (hangul_is_jungseong(combined)) {
if (!hangul_ic_push(hic, combined)) {
return false;
}
} else {
hangul_ic_save_commit_string(hic);
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else {
goto flush;
}
} else if (hic->buffer.choseong) {
if (hangul_is_choseong(ch)) {
combined = hangul_combination_combine(hic->combination,
hic->buffer.choseong, ch);
if (!hangul_ic_push(hic, combined)) {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else {
if (!hangul_ic_push(hic, ch)) {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
}
} else {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
hangul_ic_save_preedit_string(hic);
return true;
flush:
hangul_ic_flush_internal(hic);
return false;
}
static bool
hangul_ic_process_jamo(HangulInputContext *hic, ucschar ch)
{
ucschar jong;
ucschar combined;
if (!hangul_is_jamo(ch) && ch > 0) {
hangul_ic_save_commit_string(hic);
hangul_ic_append_commit_string(hic, ch);
return true;
}
if (hic->buffer.jongseong) {
if (hangul_is_choseong(ch)) {
jong = hangul_ic_choseong_to_jongseong(hic, ch);
combined = hangul_ic_combine(hic, hic->buffer.jongseong, jong);
if (hangul_is_jongseong(combined)) {
if (!hangul_ic_push(hic, combined)) {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else {
hangul_ic_save_commit_string(hic);
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else if (hangul_is_jungseong(ch)) {
ucschar pop, peek;
pop = hangul_ic_pop(hic);
peek = hangul_ic_peek(hic);
if (hangul_is_jongseong(peek)) {
ucschar choseong = hangul_jongseong_get_diff(peek,
hic->buffer.jongseong);
if (choseong == 0) {
hangul_ic_save_commit_string(hic);
if (!hangul_ic_push(hic, ch)) {
return false;
}
} else {
hic->buffer.jongseong = peek;
hangul_ic_save_commit_string(hic);
hangul_ic_push(hic, choseong);
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else {
hic->buffer.jongseong = 0;
hangul_ic_save_commit_string(hic);
hangul_ic_push(hic, hangul_jongseong_to_choseong(pop));
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else {
goto flush;
}
} else if (hic->buffer.jungseong) {
if (hangul_is_choseong(ch)) {
if (hic->buffer.choseong) {
jong = hangul_ic_choseong_to_jongseong(hic, ch);
if (hangul_is_jongseong(jong)) {
if (!hangul_ic_push(hic, jong)) {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else {
hangul_ic_save_commit_string(hic);
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else {
if (hic->option_auto_reorder) {
/* kr 처럼 자모가 역순인 경우 처리 */
if (!hangul_ic_push(hic, ch)) {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else {
hangul_ic_save_commit_string(hic);
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
}
} else if (hangul_is_jungseong(ch)) {
combined = hangul_ic_combine(hic, hic->buffer.jungseong, ch);
if (hangul_is_jungseong(combined)) {
if (!hangul_ic_push(hic, combined)) {
return false;
}
} else {
hangul_ic_save_commit_string(hic);
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else {
goto flush;
}
} else if (hic->buffer.choseong) {
if (hangul_is_choseong(ch)) {
combined = hangul_ic_combine(hic, hic->buffer.choseong, ch);
/* 초성을 입력한 combine 함수에서 종성이 나오게 된다면
* 이전 초성도 종성으로 바꿔 주는 편이 나머지 처리에 편리하다.
* 이 기능은 MS IME 호환기능으로 ㄳ을 입력하는데 사용한다. */
if (hangul_is_jongseong(combined)) {
hic->buffer.choseong = 0;
ucschar pop = hangul_ic_pop(hic);
ucschar jong = hangul_choseong_to_jongseong(pop);
hangul_ic_push(hic, jong);
}
if (!hangul_ic_push(hic, combined)) {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
} else {
if (!hangul_ic_push(hic, ch)) {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
}
} else {
if (!hangul_ic_push(hic, ch)) {
return false;
}
}
hangul_ic_save_preedit_string(hic);
return true;
flush:
hangul_ic_flush_internal(hic);
return false;
}