Allow startUnicode to start at 0xf0000

[exil]

I would like to have the startUnicode value be 0xf0000 but it does not seem to work. From what I can tell it is because String.fromCharCode used in writeFontStream only works up to 0xffff. Is it possible to support 5 digit unicode characters (such as using String.fromCodePoint instead?) or is there perhaps some workaround I can use in the meantime?

[jaywcjlove]

@exil Hello! This issue is because String.fromCharCode only supports characters up to 0xFFFF and cannot handle higher Unicode characters. If you want to support five-digit Unicode characters (such as 0xf0000), you should use String.fromCodePoint, which supports the full Unicode range, including characters from 0x10000 to 0x10FFFF.

You can try replacing String.fromCharCode with String.fromCodePoint in your code, and that should handle high-code characters. If the issue is resolved after the modification, feel free to submit a PR. You can test it first to see if it works, and if there are any problems, we can discuss further.

svgtofont/src/index.ts

Line 283 in ea1fd1e

let encodedCodes: string | number = _code.charCodeAt(0);

svgtofont/src/index.ts

Line 288 in ea1fd1e

encodedCodes = _code.split('').map(x => x.charCodeAt(0)).join(';&#');

-      let encodedCodes: string | number = _code.charCodeAt(0);
+      let encodedCodes: string | number = _code.codePointAt(0);

svgtofont/src/utils.ts

Line 38 in ea1fd1e

const curUnicode = String.fromCharCode(startUnicode);

- const curUnicode = String.fromCharCode(startUnicode);
+ const curUnicode = String.fromCodePoint(startUnicode);

[netcore-jroger]

@exil Did you try?

[exil]

@exil Did you try?

I have not had a chance to try yet but I will keep you updated.