lightningcss
Servo
lightningcss | Servo | |
---|---|---|
11 | 134 | |
5,966 | 26,075 | |
2.0% | 1.0% | |
8.7 | 10.0 | |
6 days ago | 3 days ago | |
Rust | Rust | |
Mozilla Public License 2.0 | Mozilla Public License 2.0 |
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lightningcss
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I'm fed up with it, so I'm writing a browser
Would you consider using some libraries in your project? There are lots of good ones in the Rust ecosystem, and many of them are not part of any existing browsers.
For example:
- https://github.com/servo/html5ever (HTML parsing - note: this is used in Servo)
- https://github.com/parcel-bundler/lightningcss (CSS parsing)
- https://github.com/DioxusLabs/taffy (web layout)
- https://github.com/pop-os/cosmic-text (text layout and rendering)
Obviously you should be free to work on whatever you like, but just as a benchmark on the scope of your project: I spent ~6 months implementing just the CSS Grid algorithm in Taffy last year. An entire browser from literal scratch is probably a 10 year project for one person.
- LightningCSS Benchmark
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We're building a browser when it's supposed to be impossible
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 be able to expose complex APIs with enforced type safety and this isn't possible with C.
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Help with "returns a value referencing data owned by the current function"
Background: I encountered this problem using lightningcss.
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On Using Rust in Parcel and Vitest
You can do it - that's actually exactly what my project is doing. I have a single repository with a Rust project, that builds the .wasm file (+ .d.ts + .js) using wasm-pack, and a Node.js project, that uses this .wasm file. There's no problem in packing that and exposing as a npm package. See parcel-bundler/lightningcss for a full blown example (it's not using wasm-pack but builds the Rust project directly).
- An fast CSS parser, transformer, bundler, and minifier written in Rust
- Parcel-Css - A CSS parser, transformer, and minifier written in Rust.
- ParcelCSS – A CSS parser, transformer, and minifier written in Rust
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Parcel CSS: A new CSS parser, compiler, and minifier
Initial commit, 9 Oct 2021. That is pretty new.
Servo
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GitHub Sponsor the Servo Rust project!
Servo, the embeddable, independent, memory-safe, modular, parallel web rendering engine
- Bringing Exchange Support to Thunderbird
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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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The Ladybird Browser Project
Great to see some competition still alive in browser engine development. See also Servo (previously part of Mozilla) https://servo.org/ - that and Ladybird are still very underdeveloped compared to every day browsers.
It's a huge shame that there are no nightly builds of ladybird to try out but I assume that's because they just don't want the bug reports (if everything doesn't work it's pointless getting random bugs filed).
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Mozilla's Abandoned Web Engine 'Servo' Project Is Getting a Well-Deserved Reboot
I haven't messed with it yet but from looking into it, this should absolutely work.
https://github.com/servo/servo/wiki/Building-on-ARM-desktop-...
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An open-source browser engine written in Rust
don't know, there was a downtime in 2021 and 22 but since 2023, contributions look back to where it was before .. https://github.com/servo/servo/graphs/contributors
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Modern Java/JVM Build Practices
The world has moved on though to opinionated tools, and Rust isn't even the furthest in that direction (That would be Go). The equivalent of those two lines in Cargo.toml would be this example of a basic configuration from the jacoco-maven-plugin: https://www.jacoco.org/jacoco/trunk/doc/examples/build/pom.x... - That's 40 lines in the section to do the "defaults".
Yes, you could add a load of config for files to include/exclude from coverage and so on, but the idea that that's a norm is way more common in Java projects than other languages. Like here's some example Cargo.toml files from complicated Rust projects:
Servo: https://github.com/servo/servo/blob/main/Cargo.toml
rust-gdext: https://github.com/godot-rust/gdext/blob/master/godot-core/C...
ripgrep: https://github.com/BurntSushi/ripgrep/blob/master/Cargo.toml
socketio: https://github.com/1c3t3a/rust-socketio/blob/main/socketio/C...
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Top 10 Rusty Repositories for you to start your Open Source Journey
1. Servo
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❓ Is Google flagging activity from Firefox and targeting uBlock?
It won't don't worry. There already are forks, for the worst case scenario. And Servo is on its way. Not yet ready, but it will be. Originally, from Mozilla kitchen.
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Populating the page: how browsers work
To pain broad strokes, the layout phase (~= take the HTML, take the CSS, determine the position and size of boxes) is largely sequential in production browser engine today. Selector matching (~= what CSS applies to what element) is parallel in Firefox today, via the Stylo Rust crate originally developed in the research browser engine Servo. Servo can do parallel layout in some capacity (but doesn't implement everything), https://github.com/servo/servo/wiki/Servo-Layout-Engines-Rep... is an interesting and recent document on the matter.
Parallel layout is generally considered to be a complex engineering problem by domain experts.
https://hacks.mozilla.org/2017/08/inside-a-super-fast-css-en... is a really cool article that is related, that is a few years old but what it says is largely correct today.
What are some alternatives?
PostCSS - Transforming styles with JS plugins
tauri - Build smaller, faster, and more secure desktop applications with a web frontend.
swc - Rust-based platform for the Web
webview - Tiny cross-platform webview library for C/C++. Uses WebKit (GTK/Cocoa) and Edge WebView2 (Windows).
rust-cssparser - Rust implementation of CSS Syntax Level 3
qtwebengine - Qt WebEngine
parse5 - HTML parsing/serialization toolset for Node.js. WHATWG HTML Living Standard (aka HTML5)-compliant.
xsv - A fast CSV command line toolkit written in Rust.
x-ray - The next web scraper. See through the <html> noise.
xi-editor - A modern editor with a backend written in Rust.
excel-stream
Fractalide - Reusable Reproducible Composable Software