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use crate::syntax_highlight::syntax_highlight;
use super::parser::{Block, Span};
pub fn span_to_html(ss: Vec<Span>) -> String {
let mut out = String::new();
for s in ss {
out += match s {
Span::Break => format!("<br/>"),
Span::Text(t) => escape(&t),
Span::Code(c) => format!("<code>{}</code>", escape(&c)),
Span::Link(text, url) => {
format!("<a href=\"{}\">{}</a>", escape(&url), escape(&text))
}
Span::Image(_, _) => todo!(),
Span::Emphasis(c) => format!("<i>{}</i>", span_to_html(c)),
Span::Strong(c) => format!("<b>{}</b>", span_to_html(c)),
Span::Latex(s) => fix_katex(
&katex::render_with_opts(&s, &katex::OptsBuilder::default().build().unwrap())
.unwrap(),
),
}
.as_str()
}
out
}
pub fn blocks_to_html(blocks: Vec<Block>) -> String {
let mut out = String::new();
for e in blocks {
out += match e {
Block::Header(level, text) => {
format!("<h{level}>{}</h{level}>", span_to_html(text))
}
Block::Paragraph(p) => format!("<p>{}</p>", span_to_html(p)),
Block::Blockquote(q) => format!("<quote>{}</quote>", blocks_to_html(q)),
Block::CodeBlock(syntax, content) => {
format!(
"<pre>{}</pre>",
syntax_highlight(&syntax.unwrap_or(String::from("")), &content)
.unwrap_or_else(|| escape(&content))
)
}
Block::OrderedList(els) => format!(
"<ol>{}</ol>",
els.into_iter()
.map(|e| format!("<li>{}</li>", blocks_to_html(e)))
.collect::<Vec<_>>()
.join("")
),
Block::UnorderedList(els) => {
format!(
"<ul>{}</ul>",
els.into_iter()
.map(|e| format!("<li>{}</li>", blocks_to_html(e)))
.collect::<Vec<_>>()
.join("")
)
}
Block::Raw(r) => r,
Block::Hr => format!("<hr/>"),
Block::LatexBlock(s) => fix_katex(
&katex::render_with_opts(
&s,
&katex::OptsBuilder::default()
.display_mode(true)
.build()
.unwrap(),
)
.unwrap(),
),
}
.as_str();
}
out
}
pub fn escape(text: &str) -> String {
text.replace("&", "&")
.replace("<", "<")
.replace(">", ">")
.replace("'", "’")
.replace("\"", """)
}
// TODO this is *really* bad fix
fn fix_katex<'a>(s: &str) -> String {
let e = s.find("<span class=\"katex-html\"").unwrap();
s[0..e].replace(
"<mspace linebreak=\"newline\"></mspace>",
"</mrow></semantics></math><math xmlns=\"http://www.w3.org/1998/Math/MathML\" display=\"block\"><semantics><mrow>",
)
}
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