kladd 0.1.0

A weirdly personal markup language
Documentation 
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use crate::ast::{Block, BlockNode, Document, Inline, InlineNode};

pub fn to_html(Document { body, .. }: &Document) -> String {
    let mut res = String::new();

    for elem in body {
        htmlify_block(elem, &mut res);
    }

    res
}

fn level_to_heading(level: u8) -> &'static str {
    match level {
        1 => "h1",
        2 => "h2",
        3 => "h3",
        4 => "h4",
        5 => "h5",
        _ => "h6",
    }
}

fn htmlify_block(node: &BlockNode, buf: &mut String) {
    match &node.node {
        Block::Heading { level, body } => {
            buf.push('<');
            buf.push_str(level_to_heading(*level));
            buf.push('>');

            for node in body {
                htmlify_inline(node, buf);
            }

            buf.push_str("</");
            buf.push_str(level_to_heading(*level));
            buf.push('>');
        }
        Block::Paragraph(nodes) => {
            buf.push_str("<p>");

            for node in nodes {
                htmlify_inline(node, buf);
            }

            buf.push_str("</p>");
        }
        Block::Section(nodes) => {
            buf.push_str("<section>");

            for node in nodes {
                htmlify_block(node, buf);
            }

            buf.push_str("</section>");
        }
        Block::Div(nodes) => {
            buf.push_str("<div>");

            for node in nodes {
                htmlify_block(node, buf);
            }

            buf.push_str("</div>");
        }
    }
}

fn htmlify_inline(node: &InlineNode, buf: &mut String) {
    match &node.node {
        Inline::Text(str) => {
            buf.push_str(str);
        }
        Inline::Strong(nodes) => {
            buf.push_str("<strong>");
            for node in nodes {
                htmlify_inline(node, buf);
            }
            buf.push_str("</strong>");
        }
        Inline::Italic(nodes) => {
            buf.push_str("<em>");
            for node in nodes {
                htmlify_inline(node, buf);
            }
            buf.push_str("</em>");
        }
        Inline::Underline(nodes) => {
            buf.push_str(r#"<span class="underline">"#);
            for node in nodes {
                htmlify_inline(node, buf);
            }
            buf.push_str("</span>");
        }
        Inline::Highlight(nodes) => {
            buf.push_str("<mark>");
            for node in nodes {
                htmlify_inline(node, buf);
            }
            buf.push_str("</mark>");
        }
        Inline::Strikethrough(nodes) => {
            buf.push_str("<s>");
            for node in nodes {
                htmlify_inline(node, buf);
            }
            buf.push_str("</s>");
        }
        Inline::Superscript(nodes) => {
            buf.push_str("<sup>");
            for node in nodes {
                htmlify_inline(node, buf);
            }
            buf.push_str("</sup>");
        }
        Inline::Subscript(nodes) => {
            buf.push_str("<sub>");
            for node in nodes {
                htmlify_inline(node, buf);
            }
            buf.push_str("</sub>");
        }
        Inline::Naked(nodes) => {
            buf.push_str(r#"<span>"#);
            for node in nodes {
                htmlify_inline(node, buf);
            }
            buf.push_str("</span>");
        }
        Inline::Quoted(_quote, nodes) => {
            for node in nodes {
                htmlify_inline(node, buf);
            }
        }
        Inline::Custom { body, .. } => {
            buf.push_str(r#"<span>"#);
            for node in body {
                htmlify_inline(node, buf);
            }
            buf.push_str("</span>");
        }
        Inline::Softbreak => buf.push('\n'),
        Inline::Hardbreak => todo!(),
    }
}

#[cfg(test)]
mod tests {}