76 lines
2.2 KiB
Rust
76 lines
2.2 KiB
Rust
use anyhow::Result;
|
|
use comrak::nodes::{AstNode, NodeValue};
|
|
use comrak::{format_commonmark, parse_document, Arena, ComrakOptions};
|
|
use std::cell::RefCell;
|
|
use std::fs::read_to_string;
|
|
use std::path::PathBuf;
|
|
|
|
pub(crate) fn read(fname: PathBuf, tag: String) -> Result<String> {
|
|
let data = read_to_string(fname)?;
|
|
let arena = Arena::new();
|
|
let mut root = parse_document(&arena, &data, &ComrakOptions::default());
|
|
|
|
let collect = RefCell::new(false);
|
|
let buf = RefCell::new(Vec::<u8>::new());
|
|
|
|
iter_nodes(&mut root, &|node| {
|
|
let nd = node.data.borrow();
|
|
|
|
match nd.value {
|
|
NodeValue::Heading(ref hdr) => {
|
|
if hdr.level == 2 {
|
|
if *collect.borrow() {
|
|
collect.swap(&RefCell::new(false));
|
|
}
|
|
|
|
let found_tag = String::from_utf8(nd.content.clone())?;
|
|
|
|
if found_tag == tag {
|
|
collect.swap(&RefCell::new(true));
|
|
}
|
|
} else {
|
|
if *collect.borrow() {
|
|
let mut apd = buf.borrow_mut();
|
|
let mut new_buf = Vec::<u8>::new();
|
|
format_commonmark(&node, &ComrakOptions::default(), &mut new_buf)?;
|
|
apd.append(&mut new_buf);
|
|
}
|
|
}
|
|
Ok(())
|
|
}
|
|
NodeValue::Item(_) => Ok(()),
|
|
_ => {
|
|
if *collect.borrow() {
|
|
let mut apd = buf.borrow_mut();
|
|
let mut new_buf = Vec::<u8>::new();
|
|
format_commonmark(&node, &ComrakOptions::default(), &mut new_buf)?;
|
|
apd.append(&mut new_buf);
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
}
|
|
})?;
|
|
|
|
Ok(String::from_utf8(buf.into_inner())?)
|
|
}
|
|
|
|
fn iter_nodes<'a, F>(node: &'a AstNode<'a>, f: &F) -> Result<()>
|
|
where
|
|
F: Fn(&'a AstNode<'a>) -> Result<()>,
|
|
{
|
|
f(node)?;
|
|
for c in node.children() {
|
|
match c.data.borrow().value {
|
|
NodeValue::Text(_) => {}
|
|
NodeValue::Item(_) => {}
|
|
NodeValue::Code(_) => {}
|
|
_ => {
|
|
iter_nodes(c, f)?;
|
|
}
|
|
}
|
|
}
|
|
|
|
Ok(())
|
|
}
|