82 lines
2 KiB
Rust
82 lines
2 KiB
Rust
use std::convert::From;
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use std::env::args;
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use std::fs;
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use std::io::{Error as IOError, Write};
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use std::result::Result;
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use std::string::FromUtf8Error;
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use orgize::export::{DefaultHtmlHandler, HtmlHandler};
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use orgize::{Element, Org};
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use slugify::slugify;
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#[derive(Debug)]
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enum MyError {
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IO(IOError),
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Heading,
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Utf8(FromUtf8Error),
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}
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// From<std::io::Error> trait is required for custom error type
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impl From<IOError> for MyError {
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fn from(err: IOError) -> Self {
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MyError::IO(err)
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}
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}
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impl From<FromUtf8Error> for MyError {
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fn from(err: FromUtf8Error) -> Self {
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MyError::Utf8(err)
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}
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}
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#[derive(Default)]
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struct MyHtmlHandler(DefaultHtmlHandler);
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impl HtmlHandler<MyError> for MyHtmlHandler {
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fn start<W: Write>(&mut self, mut w: W, element: &Element) -> Result<(), MyError> {
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if let Element::Title(title) = element {
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if title.level > 6 {
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return Err(MyError::Heading);
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} else {
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write!(
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w,
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"<h{0}><a id=\"{1}\" href=\"#{1}\">",
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title.level,
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slugify!(&title.raw),
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)?;
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}
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} else {
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// fallthrough to default handler
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self.0.start(w, element)?;
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}
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Ok(())
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}
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fn end<W: Write>(&mut self, mut w: W, element: &Element) -> Result<(), MyError> {
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if let Element::Title(title) = element {
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write!(w, "</a></h{}>", title.level)?;
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} else {
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self.0.end(w, element)?;
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}
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Ok(())
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}
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}
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fn main() -> Result<(), MyError> {
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let args: Vec<_> = args().collect();
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if args.len() < 2 {
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eprintln!("Usage: {} <org-file>", args[0]);
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} else {
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let contents = String::from_utf8(fs::read(&args[1])?)?;
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let mut writer = Vec::new();
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let mut handler = MyHtmlHandler::default();
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Org::parse(&contents).write_html_custom(&mut writer, &mut handler)?;
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println!("{}", String::from_utf8(writer)?);
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}
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Ok(())
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}
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