Spans of font sizes

[rhelmot]

This is a highly requested feature from a rich text editor - being able to change font size within a line.

I looked into doing this myself but couldn't figure out a good way to get the attrs into layout without adding a font size field to the shaping structs, which seemed to be against the spirit of the design. If there's any advice on what changes would need to be made where to make this happen, I'll gladly do it.

[jackpot51]

Color was also done in that sort of strange way. Perhaps both color and font size could be a struct specifically for overriding things later on in the process?

[geom3trik]

How much later though? Because wouldn't font size affect shaping? (it my not, I'm just wondering)

[jackpot51]

font size affects layout, not shaping. Though I'd probably break up runs of different font sizes into different shaping runs to make sure they don't have ligatures connecting them.

[J-Cake]

I just wanted to leave a plus one on this please. I would make heavy use of this

[Dimchikkk]

Yeah, I am implementing markdown support for my app using cosmic-text, and for implementing markdown headings this feature would be really handy, so plus one to it.

[Dimchikkk]

Hello, @conradludgate! I noticed that you referenced this specific issue and made some changes to the code. I'm curious to know the current status of those changes. Do you have any plans to submit a PR soon to address the issue? I'm quite interested in having this feature implemented and would appreciate any updates or information you can provide. Thank you!

[conradludgate]

Hello, @conradludgate! I noticed that you referenced this specific issue and made some changes to the code. I'm curious to know the current status of those changes. Do you have any plans to submit a PR soon to address the issue? I'm quite interested in having this feature implemented and would appreciate any updates or information you can provide. Thank you!

I believe it worked well enough for my needs. I don't have time right now to continue working on it, but I'm happy for someone to take my commit and open a PR from it

[Dimchikkk]

@conradludgate I gave the changes a try, but they're not quite what I had in mind. What I really need is a feature to make spans bigger by adjusting the font size, so I can effectively implement markdown headings.