cosmic-text

I maintain a web layout library that is designed to be integrated into other software: https://github.com/DioxusLabs/taffy It needs to be combined with a text layout engine (such as https://github.com/pop-os/cosmic-text), and it doesn't support everything yet (notable features that are currently missing: "float", "display: inline-block", "box-sizing: content-box", "position: static"). But we have Block, Flexbox and CSS Grid support with more on the way.

You might be interested in the combination of Taffy [0] which handles box-level browser layout (block, flexbox, grid, etc) and Cosmic Text [1] which handles text-level layout and basic text editing functionality. Integrating them into browsers while retaining accessibility could be tricky. But in they're general they're relatively small standalone libraries implementing most of the layout algorithms that browsers implement (although there are currently a few key missing features like laying out "inline-block" items in line with text). [0]: https://github.com/DioxusLabs/taffy [1]: https://github.com/pop-os/cosmic-text

Libraries for a lot of this stuff exist (albeit in many cases not very mature yet): - https://github.com/pop-os/cosmic-text does text layout (which Taffy explicitly considers out of scope) - https://github.com/AccessKit/accesskit does accessibility - https://github.com/servo/rust-cssparser does value-agnostic CSS parsing (it will parse the general syntax but leaves value parsing up to the user, meaning you can easily add support for whatever properties you what). Libraries like https://github.com/parcel-bundler/lightningcss implement parsing for the standard css properties. - There are crates like https://github.com/BurntSushi/bstr and https://docs.rs/wtf8/latest/wtf8/ for working with non-unicode text We are planning to add a C API to Taffy, but tbh I feel like C is not very good for this kind of modularised approach. You really want to

There are a number of up-and-coming Rust-based frameworks in this niche: - https://github.com/iced-rs/iced (probably the most usable today) - https://github.com/vizia/vizia - https://github.com/marc2332/freya - https://github.com/linebender/xilem (currently very incomplete but exciting because it's from a team with a strong track record) What is also exciting to me is that the Rust GUI ecosystem is in many cases building itself up with modular libraries. So while we have umpteen competing frameworks they are to a large degree all building and collaborating on the same foundations. For example, we have: - https://github.com/rust-windowing/winit (cross-platform window creation) - https://github.com/gfx-rs/wgpu (abstraction on top of vulkan/metal/dx12) - https://github.com/linebender/vello (a canvas like imperative drawing API on top of wgpu