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#![deny(missing_docs)]
#[macro_use]
extern crate failure;
#[macro_use]
extern crate log;
#[macro_use]
extern crate lazy_static;
extern crate pulldown_cmark;
extern crate regex;
use pulldown_cmark::{Event, Tag};
mod code_block;
pub use code_block::CodeBlock;
mod code_flags;
use code_flags::CodeFlags;
#[derive(Debug, Clone, Copy)]
enum Location {
SomewhereUnimportant,
InCodeBlock,
}
pub fn extract_code_blocks<'md, I: Iterator<Item = Event<'md>>>(
md_events: I,
) -> Result<Vec<CodeBlock>, failure::Error> {
let mut code_blocks = Vec::new();
let mut location = Location::SomewhereUnimportant;
let mut current_code_block = CodeBlock::default();
for event in md_events {
match (event, location) {
(Event::Start(Tag::CodeBlock(flags)), Location::SomewhereUnimportant) => {
location = Location::InCodeBlock;
let flags = flags.parse::<CodeFlags>()?;
trace!(
"found code block{}",
if let Some(f) = flags.filename() {
format!(" with file name `{}`", f)
} else {
" without a file name".to_string()
}
);
current_code_block.set_flags(flags);
}
(Event::Text(code), Location::InCodeBlock) => {
current_code_block.push_content(&code);
}
(Event::End(Tag::CodeBlock(_lang)), Location::InCodeBlock) => {
location = Location::SomewhereUnimportant;
trace!(
"end of code block for file `{}`",
current_code_block
.filename()
.unwrap_or_else(|| "<unnamed>".to_string())
);
code_blocks.push(current_code_block.clone());
current_code_block = CodeBlock::default();
}
_ => {}
}
}
Ok(code_blocks)
}