taffy
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taffy | pomsky | |
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36 | 19 | |
1,794 | 1,259 | |
6.9% | 0.2% | |
8.6 | 8.4 | |
10 days ago | 3 months ago | |
Rust | Rust | |
GNU General Public License v3.0 or later | Apache License 2.0 |
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taffy
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Show HN: Dropflow, a CSS layout engine for node or <canvas>
I maintain a standalone web layout engine[0] (currently implementing Flexbox and CSS Grid) which has no scripting support. WPT layout tests using is a major blocker to us running WPT tests against our library. Yoga (used by React Native) is in a similar position.<p>Do you think the WPT would accept pull requests replacing such tests with equivalent tests that don't use <script> (perhaps using a build script to generate multiple tests instead - or simply writing out the tests longhand)?<p>I could run against only the ref-tests, but if I can't get full coverage then the WPT seems to provide little value over our own test suite.<p>[0]: <a href="https://github.com/DioxusLabs/taffy">https://github.com/DioxusLabs/taffy</a>
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CSS for Printing to Paper
> Is there any easy to use/hack HTML layouting engine where I could experiment with custom CSS attributes and bridge that gap? Would anything from Servo be suitable?
Servo could be used for this. You'd want to add support for parsing the CSS properties themselves to the style crate in https://github.com/servo/stylo and then the layout implementation to the layout2020 crate in https://github.com/servo/servo. You do effectively get a whole browser though.
I'm currently working on building a lighter weight / hackable layout engine based on a combination of https://github.com/servo/stylo (for css parsing and selector resolution), https://github.com/DioxusLabs/taffy (for box-level layout) and https://github.com/pop-os/cosmic-text (for flow/inline layout). I expect to have something decent in around 6 months
Neither of these setups currently have any support for pagination though.
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I'm fed up with it, so I'm writing a browser
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.
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Looking for this. html + css rendering through wgpu.
All of these projects have in common that they use Taffy (the project that I work on!) for box-level layout (which currently gives them block, flexbox, and grid layout) , and are either using or planning to use cosmic-text for text/inline layout. This gives you a decent first approximation of web layout, but it's not perfect and there are major features like float, display: inline-block, position: static, box-sizing: content-box missing. Not to mention that none of these implementations currently resolve CSS selectors, so you are effectively limited to inline styles (if you're interested in something in that direction then you may be interested in https://github.com/vizia/vizia).
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Show HN: Slint - A Declarative UI Toolkit Written in Rust for Embedded & Desktop
While there are a lot of Rust UI frameworks, none of them are really recommended for production use yet. I suspect a few of the will die off and work will coalesce a few once things mature a bit.
Another nice feature of the Rust UI ecosystem is that lots of it is being built in a modular way. For example I maintain a layout engine [0] library which just does layout and can be easily integrated by anybody creating a UI library. And there a bunch of similar composable libraries covering rendering, text layout, accessibility, window creation, clipboard access, etc.
[0]: https://github.com/DioxusLabs/taffy
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Conflict-Driven Synthesis for Layout Engines
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
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Ink: React for interactive command-line apps
I maintain a library (https://github.com/DioxusLabs/taffy) that implements both Flexbox and CSS Grid, and is designed to be easily embedded (similar to Yoga, which Ink is using).
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[Media] Version 0.3 of Inlyne - An interactive markdown renderer written entirely in Rust
https://github.com/DioxusLabs/taffy (disclaimer: I work on this crate) which does CSS layout given CSS styles. This would probably be much more useful once we merge support for display: block (https://github.com/DioxusLabs/taffy/pull/474), and if in the future we support display: table. Taffy doesn't handle text layout but is designed to integrate nicely with external layout systems.
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Project idea: port markdownlint to Rust
Ok, "1.4GB" made me look into this more. I hadn't realised that we were using a "superlinter" action that includes linters for over 10 languages. Switching to a different github action brought to time down to 3 seconds! https://github.com/DioxusLabs/taffy/pull/463
- GitHub Accelerator: our first cohort and what's next
pomsky
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How to call from Rust into JS, Java, C#, Ruby and Python?
I started with JS, and my first step was to write a simple script that checks if a regex is valid. I can call this script from Rust, but there's a problem: Starting a nodejs process takes about 100ms, which is not acceptable, especially for fuzzing.
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How do you guard against stack overflows
I noticed this when a test case of a parser I wrote failed in CI on Windows. I then learned that the default stack size on Windows is only 1 MiB whereas its 8 MiB on Linux if I remember correctly. The parser has a hard-coded recursion limit to prevent stack overflows, which is currently set to 128. However, this limit is lower than necessary on Linux, and might still be too high for some platforms (embedded?)
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I have to rename Rulex
I was informed that Rulex is a registered trademark and I'm not allowed to use the name for my project. A lawyer contacted me and gave me a week to rename the project, so I have to come up with a different name :(
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Melody 0.18 (a sane alternative to regular expressions)
In the other discussion, there's also a link to Rulex, which has similar goals but is more concise. Also claims to compile to multiple regex dialects.
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Fuzzing rust-minidump at Mozilla for Embarrassment and Crashes – Part 2
Something similar happened to me a week ago. Someone emailed me that they found panics in rulex, and then created a PR to fix them. They even explained to me how to create a security advisory on GitHub because the panics could be used to DoS someone. It was very helpful.
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Where would you put Error enums?
Sorry for not being more specific. Since this is a parser, the span points into the text file that is being parsed, so it's not that relevant for most libraries. Here is the parser, it uses nom parser combinators. Unfortunately, and adding the spans to the errors involves some boilerplate.
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rulex VS melody - a user suggested alternative
2 projects | 19 Jun 2022
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Any active open source repos built using Rust that need development ?
I welcome contributions for rulex. It's a medium-sized project that should be fairly easy to understand, and has some "good first issues" :)
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Hacker News top posts: Jun 10, 2022
Rulex – A new, portable, regular expression language\ (102 comments)
- Rulex – A new, portable, regular expression language
What are some alternatives?
dioxus - Fullstack GUI library for web, desktop, mobile, and more.
melody - Melody is a language that compiles to regular expressions and aims to be more readable and maintainable
stretch - High performance flexbox implementation written in rust
grex - A command-line tool and Rust library with Python bindings for generating regular expressions from user-provided test cases
mirrord - Connect your local process and your cloud environment, and run local code in cloud conditions.
regex-automata - A low level regular expression library that uses deterministic finite automata.
yoga - Yoga is an embeddable layout engine targeting web standards.
kleenexp - modern regular expression syntax everywhere with a painless upgrade path
pypandoc - Thin wrapper for "pandoc" (MIT)
regex - An implementation of regular expressions for Rust. This implementation uses finite automata and guarantees linear time matching on all inputs.
wpt - Test suites for Web platform specs — including WHATWG, W3C, and others
oil - Oils is our upgrade path from bash to a better language and runtime. It's also for Python and JavaScript users who avoid shell!