1578022 - Round fractional Weight values from font instances (e.g. with macOS San Francisco)

Status: NEW

(DevTools :: Inspector, defect, P3)

Description

[Florens Verschelde :fvsch]

Attachment: inspector-fonts-weight-decimal.png

Steps to reproduce on macOS + Nightly:

1. Open a new tab (about:newtab), and inspect the body node
2. Open Inspector to the Fonts tab
3. In the "Instance" select, pick one of "Ultralight", "Thin", "Light", "Medium", "Semibold", "Bold" or "Heavy"

Result:

• The Weight gets set to a decimal value, for instance for "Medium": 508.1046.

Expected result:

• The weight gets set to an integer value between 1 and 1000 (included).

If we want to keep a fractional value for accuracy, we should perhaps limit the precision to something like 2 decimals. In my screenshot you can see a value that looks like: 590.979125976563; this doesn't fit in the text input, which ends up showing 590.9791 in LTR and 5976563 in RTL.