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use crate::document::ParseError;
#[derive(PartialEq, Debug, Default, Clone, Serialize)]
pub struct Heading {
pub level: u8,
pub title: crate::Rendered,
pub id: crate::ValueWithDefault<String>,
}
impl ToString for Heading {
fn to_string(&self) -> String {
self.to_p1().to_string().trim_end().to_string()
}
}
impl Heading {
pub fn new(level: u8, title: &str) -> Self {
Heading {
level,
title: crate::Rendered::line(title),
id: crate::ValueWithDefault::Default(slug::slugify(title)),
}
}
pub fn with_level(p1: &crate::p1::Section, level: u8) -> Result<Self, ParseError> {
let title = match p1.caption {
Some(ref c) => c.trim().to_string(),
None => return Err(ParseError::ValidationError("heading is empty".to_string())),
};
Ok(Heading {
level,
title: crate::Rendered::line(title.as_str()),
id: match p1.header.string_optional("id")? {
Some(v) => crate::ValueWithDefault::Found(v),
None => crate::ValueWithDefault::Default(slug::slugify(title)),
},
})
}
pub fn to_p1(&self) -> crate::p1::Section {
let p1 = crate::p1::Section::with_name(format!("h{}", self.level).as_str())
.and_caption(self.title.original.as_str());
match self.id {
crate::ValueWithDefault::Found(ref v) => p1.add_header("id", v.as_str()),
crate::ValueWithDefault::Default(_) => p1,
}
}
pub fn from_p1(p1: &crate::p1::Section) -> Result<Self, ParseError> {
match p1.caption {
Some(ref c) => {
let mut parts = c.splitn(2, ' ');
match (parts.next(), parts.next()) {
(Some(l), Some(r)) => {
let (title, level) = match l.parse() {
Ok(l) => (r.trim().to_string(), l),
Err(_) => (c.trim().to_string(), 0),
};
Ok(Heading {
level,
title: crate::Rendered::line(title.as_str()),
id: match p1.header.string_optional("id")? {
Some(v) => crate::ValueWithDefault::Found(v),
None => crate::ValueWithDefault::Default(slug::slugify(title)),
},
})
}
_ => Err(ParseError::ValidationError(
"heading must have level and title".to_string(),
)),
}
}
None => Err(ParseError::ValidationError("heading is empty".to_string())),
}
}
}
#[cfg(test)]
mod test {
use crate::prelude::*;
#[test]
fn headings() {
assert_eq!(
"-- h27: hello world",
crate::Heading {
level: 27,
title: crate::Rendered::line("hello world"),
id: crate::ValueWithDefault::Default("hello-world".to_string()),
}
.to_string()
);
p(
&indoc!(
"
-- heading: hello world2
"
),
&vec![crate::Section::Heading(crate::Heading {
level: 0,
title: crate::Rendered::line("hello world2"),
id: crate::ValueWithDefault::Default("hello-world2".to_string()),
})],
);
p(
&indoc!(
"
-- heading:12 hello world
"
),
&vec![crate::Section::Heading(crate::Heading {
level: 12,
title: crate::Rendered::line("hello world"),
id: crate::ValueWithDefault::Default("hello-world".to_string()),
})],
);
f("-- heading: ", "ValidationError: heading is empty");
p(
"-- heading:1 yo\n\nhello",
&vec![
crate::Section::Heading(crate::Heading {
level: 1,
title: crate::Rendered::line("yo"),
id: crate::ValueWithDefault::Default("yo".to_string()),
}),
crate::Section::Markdown(crate::Markdown {
body: crate::Rendered::from("hello"),
caption: None,
hard_breaks: false,
auto_links: true,
align: crate::Align::default(),
direction: crate::TextDirection::default(),
two_columns: false,
collapsed: false,
}),
],
);
}
}