feat: partially working converter, implemented most of tags
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GPG key ID:
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1 changed files with 237 additions and 14 deletions
251
src/markdown.rs
251
src/markdown.rs
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@ -1,6 +1,9 @@
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use std::{io::BufWriter, path::Path};
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use std::{
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io::{BufWriter, Write},
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path::Path,
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};
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use pulldown_cmark::{Options, Parser};
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use pulldown_cmark::{CowStr, Options, Parser};
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pub fn compile_markdown(
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src: impl AsRef<Path>,
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@ -9,53 +12,260 @@ pub fn compile_markdown(
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) -> std::io::Result<()> {
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let src_text = std::fs::read_to_string(src)?;
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let html = create_file(html)?;
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let gmi = create_file(gmi)?;
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let mut html = create_file(html)?;
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let mut gmi = create_file(gmi)?;
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let mut state = State::Start;
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let mut counter: u64 = 0;
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let mut links: Vec<GmiLink<'_>> = vec![];
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for event in Parser::new_ext(&src_text, Options::all()) {
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use pulldown_cmark::Event::*;
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match event {
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Start(tag) => {
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use pulldown_cmark::Tag::*;
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use pulldown_cmark::{CodeBlockKind, HeadingLevel, Tag::*};
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println!("{tag:?}");
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match tag {
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Paragraph => {
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html.write_all(b"<p>")?;
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if state != State::Start {
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gmi.write_all(b"\r\n\r\n")?;
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}
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}
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Heading { level, id, .. } => {
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if let Some(id) = id {
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html.write_fmt(format_args!("<{} id=\"{}\">", level, id))?;
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} else {
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html.write_fmt(format_args!("<{}>", level))?;
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}
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let hashes = match level {
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HeadingLevel::H1 => "# ",
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HeadingLevel::H2 => "## ",
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_ => "### ",
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};
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gmi.write_all(hashes.as_bytes())?;
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state = State::GmiPrefix(hashes);
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}
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BlockQuote(_kind) => {
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html.write_all(b"<blockquote>")?;
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gmi.write_all(b"> ")?;
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state = State::GmiPrefix("> ");
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}
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CodeBlock(CodeBlockKind::Fenced(lang)) => {
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html.write_all(b"<pre><code>")?;
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// TODO: highlighting with syntect
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gmi.write_fmt(format_args!("```{}\r\n", lang))?;
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}
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CodeBlock(CodeBlockKind::Indented) => {
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html.write_all(b"<pre><code>")?;
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gmi.write_all(b"```")?;
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}
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List(None) => {
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html.write_all(b"<ul>")?;
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}
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List(Some(counter_start)) => {
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counter = counter_start;
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if counter_start == 1 {
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html.write_all(b"<ol>")?;
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} else {
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html.write_fmt(format_args!("<ol start=\"{}\">", counter_start))?;
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}
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}
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Item => {
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html.write_all(b"<li>")?;
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gmi.write_fmt(format_args!("{}. ", counter))?;
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counter += 1;
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}
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Strong => {
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html.write_all(b"<b>")?;
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gmi.write_all(b"**")?;
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}
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Emphasis => {
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html.write_all(b"<i>")?;
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gmi.write_all(b"*")?;
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}
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Strikethrough => {
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html.write_all(b"<s>")?;
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gmi.write_all(b"~")?;
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}
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Link {
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dest_url, title, ..
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} => {
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html.write_fmt(format_args!("<a href=\"{}\">{}</a>", dest_url, title))?;
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gmi.write_fmt(format_args!("{}[{}]", &title, links.len() + 1))?;
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links.push(GmiLink {
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title,
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url: dest_url,
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});
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}
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Image {
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dest_url, title, ..
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} => {
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html.write_fmt(format_args!(
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"<img src=\"{}\" alt=\"{}\">",
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dest_url, title
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))?;
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gmi.write_fmt(format_args!("{}[{}]", &title, links.len() + 1))?;
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links.push(GmiLink {
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title,
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url: dest_url,
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});
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}
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Table(_align) => {
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html.write_all(b"<table>")?;
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// gmi ??
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}
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TableHead => {
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html.write_all(b"<thead><tr>")?;
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state = State::TableHead;
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}
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TableRow => {
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html.write_all(b"<tr>")?;
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}
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TableCell => {
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if state == State::TableHead {
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html.write_all(b"<th>")?;
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} else {
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html.write_all(b"<td>")?;
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}
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}
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other => {
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eprintln!("Unsupported tag: {:?}", other);
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}
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}
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}
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End(tag) => {
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use pulldown_cmark::Tag::*;
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use pulldown_cmark::TagEnd::*;
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println!("{tag:?}");
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match tag {
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Paragraph => {
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html.write_all(b"</p>")?;
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if !links.is_empty() {
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gmi.write_all(b"\r\n\r\n")?;
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for (i, link) in links.iter().enumerate() {
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gmi.write_fmt(format_args!(
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"=> {} [{}]: {}",
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link.url, i, link.title,
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))?;
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}
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links.clear();
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}
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}
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Heading(level) => html.write_fmt(format_args!("<{}>", level))?,
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BlockQuote(_) => html.write_all(b"</blockquote>")?,
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CodeBlock => {
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html.write_all(b"</code></pre>")?;
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gmi.write_all(b"```")?;
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}
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List(ordered) => {
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if ordered {
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html.write_all(b"</ol>")?;
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} else {
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html.write_all(b"</ul>")?;
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}
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}
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Item => html.write_all(b"</li>")?,
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Strong => {
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html.write_all(b"</b>")?;
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gmi.write_all(b"**")?;
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}
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Emphasis => {
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html.write_all(b"</i>")?;
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gmi.write_all(b"*")?;
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}
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Strikethrough => {
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html.write_all(b"</s>")?;
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gmi.write_all(b"~")?;
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}
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Link => {}
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TableHead => html.write_all(b"</tr></thead><tbody>")?,
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TableRow => html.write_all(b"</tr>")?,
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TableCell => {
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if state == State::TableHead {
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html.write_all(b"</th>")?
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} else {
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html.write_all(b"</td>")?
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}
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}
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Table => html.write_all(b"</tbody></table>")?,
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_ => {}
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}
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state = State::Paragraph;
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}
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Text(text) => {
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println!("!{text}!");
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html.write_all(text.as_bytes())?;
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gmi.write_all(text.as_bytes())?;
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}
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Code(code) => {
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println!("`{code}`");
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html.write_all(b"<code>")?;
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html.write_all(code.as_bytes())?;
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html.write_all(b"</code>")?;
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gmi.write_all(b"`")?;
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gmi.write_all(code.as_bytes())?;
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gmi.write_all(b"`")?;
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}
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SoftBreak => {}
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HardBreak => {
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println!("<br>");
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html.write_all(b"<br>")?;
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gmi.write_all(b"\r\n")?;
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if let State::GmiPrefix(prefix) = state {
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gmi.write_all(prefix.as_bytes())?;
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}
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}
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Rule => {
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println!("------");
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html.write_all(b"<hr>")?;
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gmi.write_all(b"---")?;
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}
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TaskListMarker(state) => {
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println!("[{state}] task");
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if state {
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html.write_all(b"<input type=checkbox checked disabled>")?;
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gmi.write_all(b"[x]")?;
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} else {
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html.write_all(b"<input type=checkbox disabled>")?;
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gmi.write_all(b"[ ]")?;
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}
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}
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other => {
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eprintln!("Unsupported markdown event: {:?}", other);
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eprintln!("Unsupported event: {:?}", other);
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}
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}
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}
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html.flush()?;
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gmi.flush()?;
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Ok(())
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}
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@ -67,3 +277,16 @@ fn create_file(path: impl AsRef<Path>) -> std::io::Result<BufWriter<std::fs::Fil
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.open(path)?;
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Ok(BufWriter::new(f))
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}
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#[derive(Debug, Clone, Copy, PartialEq, Eq)]
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enum State {
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Start,
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Paragraph,
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GmiPrefix(&'static str),
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TableHead,
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}
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struct GmiLink<'link> {
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title: CowStr<'link>,
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url: CowStr<'link>,
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}
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