mirror of
https://github.com/funamitech/mastodon
synced 2024-11-25 07:37:16 +09:00
27 lines
660 B
JavaScript
27 lines
660 B
JavaScript
// taken from:
|
|
// https://github.com/twitter/twemoji/blob/47732c7/twemoji-generator.js#L848-L866
|
|
exports.unicodeToFilename = (str) => {
|
|
let result = '';
|
|
let charCode = 0;
|
|
let p = 0;
|
|
let i = 0;
|
|
while (i < str.length) {
|
|
charCode = str.charCodeAt(i++);
|
|
if (p) {
|
|
if (result.length > 0) {
|
|
result += '-';
|
|
}
|
|
result += (0x10000 + ((p - 0xD800) << 10) + (charCode - 0xDC00)).toString(16);
|
|
p = 0;
|
|
} else if (0xD800 <= charCode && charCode <= 0xDBFF) {
|
|
p = charCode;
|
|
} else {
|
|
if (result.length > 0) {
|
|
result += '-';
|
|
}
|
|
result += charCode.toString(16);
|
|
}
|
|
}
|
|
return result;
|
|
};
|