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|
use std::io::{self, Read};
use std::ops::{Range, RangeBounds};
use pulldown_cmark::{Event, Options, Parser, Tag};
#[derive(Default)]
struct Span {
first_line: usize,
first_column: usize,
last_line: usize,
last_column: usize,
}
fn location_to_span(input: &str, loc: &Range<usize>) -> Span {
let mut ret = Span::default();
let mut line = 1;
let mut col = 1;
for (pos, ch) in input.chars().enumerate() {
if ch == '\n' {
line += 1;
col = 1;
} else {
col += 1;
}
if pos == loc.start {
ret.first_line = line;
ret.first_column = col;
}
if pos == loc.end {
ret.last_line = line;
ret.last_column = col;
}
}
ret
}
fn print_thing(input: &str, loc: &Range<usize>) {
let content = &input[loc.clone()];
let span = location_to_span(input, loc);
println!(
"> From line {} column {} to line {} column {}",
span.first_line, span.first_column, span.last_line, span.last_column
);
for l in content.lines() {
println!("> `{}`", l);
}
if span.first_line == span.last_line {
print!("> `");
for _ in 0..span.first_column {
print!(" ");
}
for _ in span.first_column..=span.last_column {
print!("^");
}
println!("`");
}
}
fn main() -> io::Result<()> {
let mut input = String::new();
let inputlen = io::stdin().read_to_string(&mut input)?;
eprintln!("Read {} bytes of input", inputlen);
let options = Options::all();
let parser = Parser::new_ext(&input, options);
let mut depth = 0;
let mut in_scenario = false;
let mut in_scenario_block = false;
let mut in_header = false;
let mut last_header_depth = 1000;
let mut last_header_content: Option<String> = None;
for (event, span) in parser.into_offset_iter() {
eprintln!("{:?}", event);
match event {
Event::Start(tag) => {
depth += 1;
eprintln!("Depth now: {}", depth);
if depth == 1 {
match tag {
Tag::Header(level) => {
// Two ways to handle a header,
// If we're in a scenario, we care only if this header
// is at the same or a higher level, otherwise we
// always read the header in.
if in_scenario {
if level <= last_header_depth {
println!("```");
in_scenario = false;
in_header = true;
last_header_depth = level;
}
} else {
in_header = true;
last_header_depth = level;
}
}
Tag::CodeBlock(name) => {
if name.as_ref() == "fable" {
// Fable code block, only valid if we were
// after a header
if last_header_content.is_some() {
in_scenario_block = true;
}
}
}
_ => {}
}
}
}
Event::End(tag) => {
depth -= 1;
eprintln!("Depth now: {}", depth);
if depth == 0 {
match tag {
Tag::Header(_) => {
// We're ending a header now
in_header = false;
}
Tag::CodeBlock(_) => {
in_scenario_block = false;
}
_ => {}
}
}
}
Event::Text(s) => {
if in_header {
// We're parsing a header
last_header_content = Some(s.to_string());
in_header = false;
if cfg!(feature = "print_headers") {
print_thing(&input, &span);
}
} else if in_scenario_block {
if !in_scenario {
for _ in 0..last_header_depth {
print!("#");
}
println!(" {}", last_header_content.as_ref().unwrap());
in_scenario = true;
println!("```fable");
}
print!("{}", s);
}
}
_ => {}
}
}
Ok(())
}
|
