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Fast and extensible Markdown for Elixir

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mdex native comrak_nif src lib.rs
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native/comrak_nif/src/lib.rs 

#[macro_use]

extern crate rustler;



mod inkjet_adapter;

mod types;



use ammonia::clean;

use comrak::{

    markdown_to_html, markdown_to_html_with_plugins, ComrakExtensionOptions, ComrakOptions,

    ComrakParseOptions, ComrakPlugins, ComrakRenderOptions,

};

use inkjet_adapter::InkjetAdapter;

use rustler::{Env, NifResult, Term};

use serde_rustler::to_term;

use types::options::*;



rustler::init!("Elixir.MDEx.Native", [to_html, to_html_with_options]);



#[rustler::nif(schedule = "DirtyCpu")]

fn to_html(md: &str) -> String {

    let inkjet_adapter = InkjetAdapter::new("onedark");

    let mut plugins = ComrakPlugins::default();

    plugins.render.codefence_syntax_highlighter = Some(&inkjet_adapter);

    markdown_to_html_with_plugins(md, &ComrakOptions::default(), &plugins)

}



#[rustler::nif(schedule = "DirtyCpu")]

fn to_html_with_options<'a>(env: Env<'a>, md: &str, options: ExOptions) -> NifResult<Term<'a>> {

    let comrak_options = ComrakOptions {

        extension: ComrakExtensionOptions::from(options.extension),

        parse: ComrakParseOptions::from(options.parse),

        render: ComrakRenderOptions::from(options.render),

    };



    match options.features.syntax_highlight_theme {

        Some(theme) => {

            let inkjet_adapter = InkjetAdapter::new(&theme);

            let mut plugins = ComrakPlugins::default();

            plugins.render.codefence_syntax_highlighter = Some(&inkjet_adapter);

            let unsafe_html = markdown_to_html_with_plugins(md, &comrak_options, &plugins);

            render(env, unsafe_html, options.features.sanitize)

        }

        None => {

            let unsafe_html = markdown_to_html(md, &comrak_options);

            render(env, unsafe_html, options.features.sanitize)

        }

    }

}



fn render(env: Env, unsafe_html: String, sanitize: bool) -> NifResult<Term> {

    let html = match sanitize {

        true => clean(&unsafe_html),

        false => unsafe_html,

    };



    to_term(env, html).map_err(|err| err.into())

}