Include font-weight in fonts option

[jednano]

The CSS that defines our fonts does it in such a way that we don't actually specify the entire font name like in the examples in the readme. Instead, we define font-weight variations like so:

.regular {
    font: 14px/calc(20/14) source-sans-pro;
    text-remove-gap: both;
}
.light {
    font: light 14px/calc(20/14) source-sans-pro;
    text-remove-gap: both;
}
.semibold {
    font: semibold 14px/calc(20/14) source-sans-pro;
    text-remove-gap: both;
}

Notice, the font-weight can sometimes be light or semibold for this font, in which case, there are different calculations we need to use for the cap and baseline locations.

Suggestion

I suggest you allow a configuration like so:

{
  "fonts": [
    {
      "family": "Source Sans Pro",
      "weight": "light",
      "cap": 0.194,
      "baseline": 0.146
    }
  ]
}

The weight being optional.

What do you think?

[jednano]

I built a Sass mixin a while back that did the same thing, but the configuration looked like this:

    source-sans-light: (
         ascender: -0.038,
              cap: -0.194,
         baseline: -0.146,
        descender:  0.082
    ),
    source-sans-regular: (
         ascender: -0.036,
              cap: -0.198,
         baseline: -0.146,
        descender:  0.070
    ),
    source-sans-semibold: (
         ascender: -0.034,
              cap: -0.200,
         baseline: -0.146,
        descender:  0.060
    )

The negatives were for trimming and the positives were for adding more space.

Point is, people might want to trim the font to the ascenders and descenders too, not just the cap and baseline. As such, I think a declaration named adjust-font-bounds would be more appropriate than text-remove-gap. For example:

.foo {
    font: light 14px/calc(20/14) source-sans-pro;
    adjust-font-bounds: cap baseline;
}

[Avol-V]

I have some experiments with different font-weights and it had no effect in one font family to this font-specific space (this is expected, as the line of text should be flat even if we use different font weights on it).

Did you find some fonts where this is not true?

About renaming and adding new parameters – looks interesting, I'll try to play with it during the week.

Thanks for your ideas!

[jednano]

@Avol-V it looks like the baseline measurements are flat as you say, regardless of font weight, but the cap position changes (i.e., the top of the capital letters changes w/ font weight). The example of this is above with Source Sans Pro. Note: the ascenders and descenders change too. The only thing that remains constant and "flat" is the baseline and this is not just limited to Source Sans Pro.

[jednano]

I noticed you measure @ 1/100 precision, but I've been measuring at 1/1000 precision.