Unicode support

[pavlos256]

Atto has problems with some Unicode characters (like emoji).

Example program:

10 PRINT "Καλημέρα 😄"

test.atto.txt

The problem is that when accessing chars like text[9], the emoji is returned in two parts (positions 9 & 10). A workaround is to do:

var chars = Array.from(text);

Then chars[9] will return "😄".

Applying this change to term.js:print() and canvas.js:drawText() seems to be enough to make the above program run correctly. The program listing still has problems though, because of the hid.js:render function.

[James-Livesey]

Today I learned about the Array.from function for Unicode conversion! Thanks for letting me know about this bug, though. I do think that emoji would be a welcome addition to atto! I'll look into this and let you know when it's all fixed.

[James-Livesey]

All issues with rendering emoji should be solved now! Hopefully this will be a great addition for younger users of atto who want to add emojis to their programs. I remember users of educational programming languages such as Hopscotch heavily relying on emoji to convey pictorial meaning, so there's no doubt that emojis will be used a lot in atto!