continue working ish
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12
data/demo-result.html
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12
data/demo-result.html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Document</title>
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</head>
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<body>
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<h1 class="class">some content</h1>
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<p>this is some text and contains <a href="https://example.com"></a> a link</p>
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</body>
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</html>
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36
data/demo.ihl
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36
data/demo.ihl
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// defined base element
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document [
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title: "example",
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lang: "de",
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] {
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h1.class "some content";
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p {
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"this is some text and contains ";
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a [ href: "https://example.com" ] "a link";
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".";
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}
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}
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// attributes are by default parsed as:
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// key: value
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// and are comma seperated.
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//
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// items can define custom parsers for attributes
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// content is by default parsed as semicolon seperated further item structures
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// plain text is just plain text
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// definitions have a : after the name
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// definitions only allow default parsing
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// @slot is the attribute that defines the element body, but can be overwritten
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navItem: [
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dest: string,
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] {
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li.nav-item {
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// use attributes using @
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// interpolate in @{} blocks
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a[ href: "https://example.com@{dest}" ] @dest;
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}
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}
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1
example.html
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1
example.html
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<html><head><title>test file!</title></head><body><h1>hello world</h1><p>this is a test file</p><p>some text followed by <a href="https://schrottkatze.de">a hyperlink</a></p></body></html>
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63
src/element.rs
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63
src/element.rs
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use std::{collections::HashMap, fmt::{Display, Write}};
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#[derive(Debug)]
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pub struct Element<'a> {
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pub name: &'a str,
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pub attributes: Option<HashMap<&'a str, &'a str>>,
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pub children: ElBody<'a>,
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}
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impl<'a> Display for Element<'a> {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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write!(
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f,
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"<{0}{1}>{2}</{0}>",
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self.name,
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if let Some(attrs) = &self.attributes {
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let mut attributes = String::from(" ");
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attrs.iter().for_each(|(key, value)| {
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attributes
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.write_fmt(format_args!("{key}=\"{value}\""))
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.unwrap()
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});
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attributes
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} else {
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"".to_owned()
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},
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self.children
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)
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}
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}
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/// the direct content of `children`, so it can be a plaintext element
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#[derive(Debug)]
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pub enum ElBody<'a> {
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Elements(Vec<ElContent<'a>>),
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Text(&'a str),
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}
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impl<'a> Display for ElBody<'a> {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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match self {
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ElBody::Text(s) => f.write_str(s),
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ElBody::Elements(els) => els.iter().try_for_each(|e| f.write_str(&e.to_string())),
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}
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}
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}
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#[derive(Debug)]
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pub enum ElContent<'a> {
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El(Element<'a>),
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Text(&'a str),
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}
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impl<'a> Display for ElContent<'a> {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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match self {
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ElContent::Text(s) => f.write_str(s),
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ElContent::El(el) => f.write_str(&el.to_string()),
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}
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}
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}
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53
src/parser.rs
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53
src/parser.rs
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use std::collections::HashMap;
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use winnow::{IResult, combinator, character::alphanumeric1, branch, sequence::delimited, multi::many0, bytes::take_until0, Parser};
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use crate::{element::{Element, ElBody, ElContent}, util::ws};
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pub fn el_parser(input: &str) -> IResult<&str, Element> {
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(
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name_parser,
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combinator::opt(el_attrlist_parser),
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el_body_parser,
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)
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.map(|(name, attributes, children)| Element {
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name,
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attributes,
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children,
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})
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.parse_next(input)
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}
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pub fn name_parser(input: &str) -> IResult<&str, &str> {
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ws(alphanumeric1).parse_next(input)
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}
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pub fn el_body_parser(input: &str) -> IResult<&str, ElBody> {
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ws(branch::alt((
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string_parser.map(|s| ElBody::Text(s)),
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delimited('{', many0(content_parser).map(|v| ElBody::Elements(v)), '}'),
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)))
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.parse_next(input)
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}
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pub fn el_attrlist_parser(input: &str) -> IResult<&str, HashMap<&str, &str>> {
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ws(delimited('[', many0(attribute_parser), ']')).parse_next(input)
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}
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pub fn attribute_parser(input: &str) -> IResult<&str, (&str, &str)> {
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(name_parser, '=', ws(string_parser))
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.map(|(key, _, value)| (key, value))
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.parse_next(input)
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}
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pub fn content_parser(input: &str) -> IResult<&str, ElContent> {
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ws(branch::alt((
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string_parser.map(|s| ElContent::Text(s)),
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el_parser.map(|e| ElContent::El(e)),
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)))
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.parse_next(input)
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}
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pub fn string_parser(input: &str) -> IResult<&str, &str> {
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delimited('"', take_until0("\""), '"').parse_next(input)
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}
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10
src/util.rs
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10
src/util.rs
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use winnow::{error::ParseError, Parser, sequence::delimited, character::multispace0};
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// whitespace combinator from [winnow docs](https://docs.rs/winnow/latest/winnow/_topic/language/index.html#wrapper-combinators-that-eat-whitespace-before-and-after-a-parser)
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pub fn ws<'a, F, O, E: ParseError<&'a str>>(inner: F) -> impl Parser<&'a str, O, E>
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where
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F: Parser<&'a str, O, E>,
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{
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delimited(multispace0, inner, multispace0)
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}
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