Negative letterspcing does not work

[loveloki]

Negative letterspcing does not work

This is code:

import { Canvas } from "skia-canvas";

let canvas = new Canvas(400, 400);
let ctx = canvas.getContext("2d");

ctx.fillStyle = "purple";
const text = "letterSpacing test";
ctx.font = "normal 20pt sans";
ctx.letterSpacing = "-100px";
ctx.fillText(text, 10, 50);

ctx.letterSpacing = "0px";
ctx.fillText(text, 10, 75);

ctx.letterSpacing = "100px";
ctx.fillText(text, 10, 100);

await canvas.saveAs("output.pdf");

Result:

I tried looking at the repo code, but it seems like there is nothing wrong...

I'm poor Rust knowledge, How should I debug this issue?

[samizdatco]

The regex that was being used to parse & validate css 'size' strings was rejecting anything beginning with a -. I've now made a special case for the letterSpacing and wordSpacing values where they're allowed to define negative sizes. Thanks for finding this bug; it had totally slipped through the cracks when I was testing!

[loveloki]

@samizdatco Thanks your explanation!