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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 | 1x 75x 75x 75x 75x 75x 155x 20x 20x 20x 135x 89x 89x 46x 46x 135x 75x 75x | /**
* @internal
*/
export function deleteSingleChar(text: string, isForward: boolean) {
// In case of emoji that occupies multiple characters, we need to delete the whole emoji
const array = [...text];
let deleteLength = 0;
for (
let i = isForward ? 0 : array.length - 1,
deleteState: 'notDeleted' | 'waiting' | 'done' = 'notDeleted';
i >= 0 && i < array.length && deleteState != 'done';
i += isForward ? 1 : -1
) {
switch (array[i]) {
case '\u200D': // ZERO WIDTH JOINER
case '\u20E3': // COMBINING ENCLOSING KEYCAP
case '\uFE0E': // VARIATION SELECTOR-15
case '\uFE0F': // VARIATION SELECTOR-16
deleteState = 'notDeleted';
deleteLength++;
break;
default:
if (deleteState == 'notDeleted') {
deleteState = 'waiting';
deleteLength++;
} else Eif (deleteState == 'waiting') {
deleteState = 'done';
}
break;
}
}
array.splice(isForward ? 0 : array.length - deleteLength, deleteLength);
return array.join('');
}
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