Yoga-rs

A Rust wrapper for Facebook's Yoga layout library.

You may also want to check out taffy (a revived fork of the abandoned stretch) as it is a pure Rust implementation.

Dependencies

• cargo
• rustc
• libc++-dev (LLVM’s libc++)

Build

$ cargo build --release

Run Example

$ cargo run --release --example layout

Format Code

$ cargo +nightly fmt

Example Code

#[macro_use]
extern crate yoga;

use yoga::prelude::*;
use yoga::Node;
use yoga::StyleUnit::{Auto, UndefinedValue};

fn main() {
    let mut node = Node::new();

    let mut child = Node::new();
    let mut other_child = Node::new();

    node.insert_child(&mut child, 0);
    node.insert_child(&mut other_child, 1);

    style!(node,
        Margin(10 pt),
        MarginLeft(Auto),
        PaddingHorizontal(4 pt),
        Left(16 %),
        Bottom(UndefinedValue)
    );

    let child_styles = make_styles!(
        Width(32 pt),
        Height(32 pt),
        FlexGrow(1.0),
        Margin(Auto)
    );

    child.apply_styles(&child_styles);
    other_child.apply_styles(&child_styles);

    node.calculate_layout(512.0, 512.0, yoga::Direction::LTR);

    println!("Layout is {:#?}", child.get_layout());
}

Testing

The unit tests are automatically generated based on upstream fixtures and should not be edited manually.

$ cargo test

To generate the test cases: Download the ChromeDriver binary and put it somewhere in your $PATH. Linux/MacOS example:

$ cp chromedriver /usr/local/bin

Then run the following

$ cd gentest
$ bundle install # Install the required ruby gems
$ ruby gentest/gentest.rb # Generate the tests
$ cargo +nightly fmt # Format the tests for consistency