tui-markup 0.2.0-alpha

markup langauge for terminal styled text
Documentation 
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use tui::{
    style::{Color, Modifier, Style},
    text::Span,
};

macro_rules! pt {
    ($text:literal) => {
        crate::parser::Item::PlainText($text.into())
    };
}

macro_rules! elem {
        (@tags, $($s:literal),+) => {
            vec![$(crate::parser::LSpan::new_extra($s, 1)),+]
        };
        ($($tags:tt),* ; $($items:expr),* $(,)?) => {
            crate::parser::Item::Element(elem!(@tags, $($tags),*), vec![$($items),*])
        };
    }

macro_rules! test_ok {
        ($item:expr => $($result:expr),* $(,)?) => {
            let mut gen = crate::generator::TuiTextGenerator::default();
            let convertor =  <crate::generator::TuiTextGenerator as crate::generator::Generator>::convertor(&mut gen);
            let item = <<crate::generator::TuiTextGenerator as crate::generator::Generator>::Convertor as crate::generator::TagConvertor>::convert_item(convertor, $item).unwrap();
            assert_eq!(
                gen.item(item, None),
                vec![$($result),*],
            )
        };
        ($custom:expr ; $item:expr => $($result:expr),* $(,)?) => {
            let mut gen = crate::generator::TuiTextGenerator::new($custom);
            let convertor =  <crate::generator::TuiTextGenerator<_> as crate::generator::Generator>::convertor(&mut gen);
            let item = <<crate::generator::TuiTextGenerator<_> as crate::generator::Generator>::Convertor as crate::generator::TagConvertor>::convert_item(convertor, $item).unwrap();
            assert_eq!(
                gen.item(item, None),
                vec![$($result),*],
            )
        };
    }

macro_rules! test_fail {
    ($elem:expr => $span:literal, $kind:expr) => {
        let mut gen = crate::generator::TuiTextGenerator::default();
        let mut convertor = <crate::generator::TuiTextGenerator as crate::generator::Generator>::convertor(&mut gen);
        let span = <crate::generator::tui::TuiTagParser<_> as crate::generator::TagConvertor>::convert_item(
            &mut convertor,
            $elem,
        )
        .unwrap_err();
        assert_eq!(*span.fragment(), $span);
    };
}

#[test]
fn test_normal_element() {
    test_ok!(elem!("green" ; pt!("xxx")) => Span::styled("xxx", Style::default().fg(Color::Green)));
    test_ok!(elem!("fg:red" ; pt!("xxx")) => Span::styled("xxx", Style::default().fg(Color::Red)));
    test_ok!(elem!("bg:yellow" ; pt!("xxx")) => Span::styled("xxx", Style::default().bg(Color::Yellow)));
    test_ok!(elem!("b" ; pt!("xxx")) => Span::styled("xxx", Style::default().add_modifier(Modifier::BOLD)));
    test_ok!(elem!("mod:i" ; pt!("xxx")) => Span::styled("xxx", Style::default().add_modifier(Modifier::ITALIC)));
}

#[test]
fn test_nested_element() {
    test_ok!(
        elem!("bg:blue" ; pt!("one "), elem!("green" ; pt!("two"))) =>
        Span::styled("one ", Style::default().bg(Color::Blue)),
        Span::styled("two", Style::default().bg(Color::Blue).fg(Color::Green)),
    );
}

#[test]
fn test_multi_tag_element() {
    test_ok!(
        elem!("bg:blue", "green", "b" ; pt!("one")) =>
        Span::styled("one", Style::default().bg(Color::Blue).fg(Color::Green).add_modifier(Modifier::BOLD)),
    );
}

#[test]
fn test_custom_tag_element() {
    let s = Style::default()
        .bg(Color::Blue)
        .fg(Color::Green)
        .add_modifier(Modifier::BOLD);
    test_ok!(
        |tag: &str| match tag {
            "keyboard" => Some(s),
            _ => None,
        } ; elem!("keyboard" ; pt!("W")) =>
        Span::styled("W", s),
    );
}

#[test]
fn test_invalid_element() {
    test_fail!(elem!("qwerty" ; pt!("one")) => "qwerty", ErrorKind::InvalidTag);
}