yoga 0.5.0

Rust bindings for Facebook's Yoga, a Flexbox layout engine
Documentation 
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extern crate ordered_float;
#[macro_use]
extern crate yoga;

use yoga::{prelude::*, Direction, FlexDirection, Node, Undefined};

#[test]
fn test_start_overrides() {
    let mut root = Node::new();

    style!(root,
        FlexDirection(FlexDirection::Row),
        Width(100 pt),
        Height(100 pt)
    );

    let mut root_child_0 = Node::new();

    style!(root_child_0,
        FlexGrow(1.0),
        MarginStart(10 pt),
        MarginLeft(20 pt),
        MarginRight(20 pt)
    );

    root.insert_child(&mut root_child_0, 0);
    root.calculate_layout(Undefined, Undefined, Direction::LTR);

    let root_layout = root.get_layout();
    let child_layout = root_child_0.get_layout();

    assert_eq!(0.0, root_layout.left());
    assert_eq!(0.0, root_layout.top());
    assert_eq!(100.0, root_layout.width());
    assert_eq!(100.0, root_layout.height());

    assert_eq!(10.0, child_layout.left());
    assert_eq!(20.0, child_layout.right());
    assert_eq!(0.0, child_layout.top());
    assert_eq!(70.0, child_layout.width());
    assert_eq!(100.0, child_layout.height());

    root.calculate_layout(Undefined, Undefined, Direction::RTL);

    let root_layout = root.get_layout();
    let child_layout = root_child_0.get_layout();

    assert_eq!(0.0, root_layout.left());
    assert_eq!(0.0, root_layout.top());
    assert_eq!(100.0, root_layout.width());
    assert_eq!(100.0, root_layout.height());

    assert_eq!(20.0, child_layout.left());
    assert_eq!(10.0, child_layout.right());
    assert_eq!(0.0, child_layout.top());
    assert_eq!(70.0, child_layout.width());
    assert_eq!(100.0, child_layout.height());
}

#[test]
fn test_end_overrides() {
    let mut root = Node::new();

    style!(root,
        FlexDirection(FlexDirection::Row),
        Width(100 pt),
        Height(100 pt)
    );

    let mut root_child_0 = Node::new();

    style!(root_child_0,
        FlexGrow(1.0),
        MarginEnd(10 pt),
        MarginLeft(20 pt),
        MarginRight(20 pt)
    );

    root.insert_child(&mut root_child_0, 0);
    root.calculate_layout(Undefined, Undefined, Direction::LTR);

    let root_layout = root.get_layout();
    let child_layout = root_child_0.get_layout();

    assert_eq!(0.0, root_layout.left());
    assert_eq!(0.0, root_layout.top());
    assert_eq!(100.0, root_layout.width());
    assert_eq!(100.0, root_layout.height());

    assert_eq!(20.0, child_layout.left());
    assert_eq!(10.0, child_layout.right());
    assert_eq!(0.0, child_layout.top());
    assert_eq!(70.0, child_layout.width());
    assert_eq!(100.0, child_layout.height());

    root.calculate_layout(Undefined, Undefined, Direction::RTL);

    let root_layout = root.get_layout();
    let child_layout = root_child_0.get_layout();

    assert_eq!(0.0, root_layout.left());
    assert_eq!(0.0, root_layout.top());
    assert_eq!(100.0, root_layout.width());
    assert_eq!(100.0, root_layout.height());

    assert_eq!(10.0, child_layout.left());
    assert_eq!(20.0, child_layout.right());
    assert_eq!(0.0, child_layout.top());
    assert_eq!(70.0, child_layout.width());
    assert_eq!(100.0, child_layout.height());
}

#[test]
fn test_horizontal_overridden() {
    let mut root = Node::new();

    style!(root,
        FlexDirection(FlexDirection::Row),
        Width(100 pt),
        Height(100 pt)
    );

    let mut root_child_0 = Node::new();

    style!(root_child_0,
        FlexGrow(1.0),
        MarginHorizontal(10 pt),
        MarginLeft(20 pt)
    );

    root.insert_child(&mut root_child_0, 0);
    root.calculate_layout(Undefined, Undefined, Direction::LTR);

    let root_layout = root.get_layout();
    let child_layout = root_child_0.get_layout();

    assert_eq!(0.0, root_layout.left());
    assert_eq!(0.0, root_layout.top());
    assert_eq!(100.0, root_layout.width());
    assert_eq!(100.0, root_layout.height());

    assert_eq!(20.0, child_layout.left());
    assert_eq!(10.0, child_layout.right());
    assert_eq!(0.0, child_layout.top());
    assert_eq!(70.0, child_layout.width());
    assert_eq!(100.0, child_layout.height());

    root.calculate_layout(Undefined, Undefined, Direction::RTL);

    let root_layout = root.get_layout();
    let child_layout = root_child_0.get_layout();

    assert_eq!(0.0, root_layout.left());
    assert_eq!(0.0, root_layout.top());
    assert_eq!(100.0, root_layout.width());
    assert_eq!(100.0, root_layout.height());

    assert_eq!(20.0, child_layout.left());
    assert_eq!(10.0, child_layout.right());
    assert_eq!(0.0, child_layout.top());
    assert_eq!(70.0, child_layout.width());
    assert_eq!(100.0, child_layout.height());
}

#[test]
fn test_vertical_overridden() {
    let mut root = Node::new();

    style!(root,
        FlexDirection(FlexDirection::Row),
        Width(100 pt),
        Height(100 pt)
    );

    let mut root_child_0 = Node::new();

    style!(root_child_0,
        FlexGrow(1.0),
        MarginVertical(10 pt),
        MarginTop(20 pt)
    );

    root.insert_child(&mut root_child_0, 0);
    root.calculate_layout(Undefined, Undefined, Direction::LTR);

    let root_layout = root.get_layout();
    let child_layout = root_child_0.get_layout();

    assert_eq!(0.0, root_layout.left());
    assert_eq!(0.0, root_layout.top());
    assert_eq!(100.0, root_layout.width());
    assert_eq!(100.0, root_layout.height());

    assert_eq!(0.0, child_layout.left());
    assert_eq!(0.0, child_layout.right());
    assert_eq!(20.0, child_layout.top());
    assert_eq!(10.0, child_layout.bottom());
    assert_eq!(100.0, child_layout.width());
    assert_eq!(70.0, child_layout.height());

    root.calculate_layout(Undefined, Undefined, Direction::RTL);

    let root_layout = root.get_layout();
    let child_layout = root_child_0.get_layout();

    assert_eq!(0.0, root_layout.left());
    assert_eq!(0.0, root_layout.top());
    assert_eq!(100.0, root_layout.width());
    assert_eq!(100.0, root_layout.height());

    assert_eq!(0.0, child_layout.left());
    assert_eq!(0.0, child_layout.right());
    assert_eq!(20.0, child_layout.top());
    assert_eq!(10.0, child_layout.bottom());
    assert_eq!(100.0, child_layout.width());
    assert_eq!(70.0, child_layout.height());
}

#[test]
fn test_horizontal_overrides_all() {
    let mut root = Node::new();

    style!(root,
        FlexDirection(FlexDirection::Row),
        Width(100 pt),
        Height(100 pt)
    );

    let mut root_child_0 = Node::new();

    style!(root_child_0,
        FlexGrow(1.0),
        MarginHorizontal(10 pt),
        Margin(20 pt)
    );

    root.insert_child(&mut root_child_0, 0);
    root.calculate_layout(Undefined, Undefined, Direction::LTR);

    let root_layout = root.get_layout();
    let child_layout = root_child_0.get_layout();

    assert_eq!(0.0, root_layout.left());
    assert_eq!(0.0, root_layout.top());
    assert_eq!(100.0, root_layout.width());
    assert_eq!(100.0, root_layout.height());

    assert_eq!(10.0, child_layout.left());
    assert_eq!(10.0, child_layout.right());
    assert_eq!(20.0, child_layout.top());
    assert_eq!(20.0, child_layout.bottom());
    assert_eq!(80.0, child_layout.width());
    assert_eq!(60.0, child_layout.height());

    root.calculate_layout(Undefined, Undefined, Direction::RTL);

    let root_layout = root.get_layout();
    let child_layout = root_child_0.get_layout();

    assert_eq!(0.0, root_layout.left());
    assert_eq!(0.0, root_layout.top());
    assert_eq!(100.0, root_layout.width());
    assert_eq!(100.0, root_layout.height());

    assert_eq!(10.0, child_layout.left());
    assert_eq!(10.0, child_layout.right());
    assert_eq!(20.0, child_layout.top());
    assert_eq!(20.0, child_layout.bottom());
    assert_eq!(80.0, child_layout.width());
    assert_eq!(60.0, child_layout.height());
}

#[test]
fn test_vertical_overrides_all() {
    let mut root = Node::new();

    style!(root,
        FlexDirection(FlexDirection::Row),
        Width(100 pt),
        Height(100 pt)
    );

    let mut root_child_0 = Node::new();

    style!(root_child_0,
        FlexGrow(1.0),
        MarginVertical(10 pt),
        Margin(20 pt)
    );

    root.insert_child(&mut root_child_0, 0);
    root.calculate_layout(Undefined, Undefined, Direction::LTR);

    let root_layout = root.get_layout();
    let child_layout = root_child_0.get_layout();

    assert_eq!(0.0, root_layout.left());
    assert_eq!(0.0, root_layout.top());
    assert_eq!(100.0, root_layout.width());
    assert_eq!(100.0, root_layout.height());

    assert_eq!(20.0, child_layout.left());
    assert_eq!(20.0, child_layout.right());
    assert_eq!(10.0, child_layout.top());
    assert_eq!(10.0, child_layout.bottom());
    assert_eq!(60.0, child_layout.width());
    assert_eq!(80.0, child_layout.height());

    root.calculate_layout(Undefined, Undefined, Direction::RTL);

    let root_layout = root.get_layout();
    let child_layout = root_child_0.get_layout();

    assert_eq!(0.0, root_layout.left());
    assert_eq!(0.0, root_layout.top());
    assert_eq!(100.0, root_layout.width());
    assert_eq!(100.0, root_layout.height());

    assert_eq!(20.0, child_layout.left());
    assert_eq!(20.0, child_layout.right());
    assert_eq!(10.0, child_layout.top());
    assert_eq!(10.0, child_layout.bottom());
    assert_eq!(60.0, child_layout.width());
    assert_eq!(80.0, child_layout.height());
}

#[test]
fn test_all_overridden() {
    let mut root = Node::new();

    style!(root,
        FlexDirection(FlexDirection::Row),
        Width(100 pt),
        Height(100 pt)
    );

    let mut root_child_0 = Node::new();

    style!(root_child_0,
        FlexGrow(1.0),
        MarginLeft(10 pt),
        MarginTop(10 pt),
        MarginRight(10 pt),
        MarginBottom(10 pt),
        Margin(20 pt)
    );

    root.insert_child(&mut root_child_0, 0);
    root.calculate_layout(Undefined, Undefined, Direction::LTR);

    let root_layout = root.get_layout();
    let child_layout = root_child_0.get_layout();

    assert_eq!(0.0, root_layout.left());
    assert_eq!(0.0, root_layout.top());
    assert_eq!(100.0, root_layout.width());
    assert_eq!(100.0, root_layout.height());

    assert_eq!(10.0, child_layout.left());
    assert_eq!(10.0, child_layout.right());
    assert_eq!(10.0, child_layout.top());
    assert_eq!(10.0, child_layout.bottom());
    assert_eq!(80.0, child_layout.width());
    assert_eq!(80.0, child_layout.height());

    root.calculate_layout(Undefined, Undefined, Direction::RTL);

    let root_layout = root.get_layout();
    let child_layout = root_child_0.get_layout();

    assert_eq!(0.0, root_layout.left());
    assert_eq!(0.0, root_layout.top());
    assert_eq!(100.0, root_layout.width());
    assert_eq!(100.0, root_layout.height());

    assert_eq!(10.0, child_layout.left());
    assert_eq!(10.0, child_layout.right());
    assert_eq!(10.0, child_layout.top());
    assert_eq!(10.0, child_layout.bottom());
    assert_eq!(80.0, child_layout.width());
    assert_eq!(80.0, child_layout.height());
}