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|
use typst_library::diag::{warning, SourceResult};
use typst_library::engine::Engine;
use typst_library::foundations::{Content, StyleChain, Target, TargetElem};
use typst_library::introspection::{SplitLocator, TagElem};
use typst_library::layout::{Abs, Axes, BlockBody, BlockElem, BoxElem, Region, Size};
use typst_library::model::ParElem;
use typst_library::routines::Pair;
use typst_library::text::{LinebreakElem, SmartQuoteElem, SpaceElem, TextElem};
use crate::fragment::html_fragment;
use crate::{attr, tag, FrameElem, HtmlElem, HtmlElement, HtmlFrame, HtmlNode};
/// Converts realized content into HTML nodes.
pub fn convert_to_nodes<'a>(
engine: &mut Engine,
locator: &mut SplitLocator,
children: impl IntoIterator<Item = Pair<'a>>,
) -> SourceResult<Vec<HtmlNode>> {
let mut output = Vec::new();
for (child, styles) in children {
handle(engine, child, locator, styles, &mut output)?;
}
Ok(output)
}
/// Convert one element into HTML node(s).
fn handle(
engine: &mut Engine,
child: &Content,
locator: &mut SplitLocator,
styles: StyleChain,
output: &mut Vec<HtmlNode>,
) -> SourceResult<()> {
if let Some(elem) = child.to_packed::<TagElem>() {
output.push(HtmlNode::Tag(elem.tag.clone()));
} else if let Some(elem) = child.to_packed::<HtmlElem>() {
let mut children = vec![];
if let Some(body) = elem.body.get_ref(styles) {
children = html_fragment(engine, body, locator.next(&elem.span()), styles)?;
}
let element = HtmlElement {
tag: elem.tag,
attrs: elem.attrs.get_cloned(styles),
children,
span: elem.span(),
};
output.push(element.into());
} else if let Some(elem) = child.to_packed::<ParElem>() {
let children =
html_fragment(engine, &elem.body, locator.next(&elem.span()), styles)?;
output.push(
HtmlElement::new(tag::p)
.with_children(children)
.spanned(elem.span())
.into(),
);
} else if let Some(elem) = child.to_packed::<BoxElem>() {
// TODO: This is rather incomplete.
if let Some(body) = elem.body.get_ref(styles) {
let children =
html_fragment(engine, body, locator.next(&elem.span()), styles)?;
output.push(
HtmlElement::new(tag::span)
.with_attr(attr::style, "display: inline-block;")
.with_children(children)
.spanned(elem.span())
.into(),
)
}
} else if let Some((elem, body)) =
child
.to_packed::<BlockElem>()
.and_then(|elem| match elem.body.get_ref(styles) {
Some(BlockBody::Content(body)) => Some((elem, body)),
_ => None,
})
{
// TODO: This is rather incomplete.
let children = html_fragment(engine, body, locator.next(&elem.span()), styles)?;
output.push(
HtmlElement::new(tag::div)
.with_children(children)
.spanned(elem.span())
.into(),
);
} else if child.is::<SpaceElem>() {
output.push(HtmlNode::text(' ', child.span()));
} else if let Some(elem) = child.to_packed::<TextElem>() {
output.push(HtmlNode::text(elem.text.clone(), elem.span()));
} else if let Some(elem) = child.to_packed::<LinebreakElem>() {
output.push(HtmlElement::new(tag::br).spanned(elem.span()).into());
} else if let Some(elem) = child.to_packed::<SmartQuoteElem>() {
output.push(HtmlNode::text(
if elem.double.get(styles) { '"' } else { '\'' },
child.span(),
));
} else if let Some(elem) = child.to_packed::<FrameElem>() {
let locator = locator.next(&elem.span());
let style = TargetElem::target.set(Target::Paged).wrap();
let frame = (engine.routines.layout_frame)(
engine,
&elem.body,
locator,
styles.chain(&style),
Region::new(Size::splat(Abs::inf()), Axes::splat(false)),
)?;
output.push(HtmlNode::Frame(HtmlFrame {
inner: frame,
text_size: styles.resolve(TextElem::size),
}));
} else {
engine.sink.warn(warning!(
child.span(),
"{} was ignored during HTML export",
child.elem().name()
));
}
Ok(())
}
/// Checks whether the given element is an inline-level HTML element.
pub fn is_inline(elem: &Content) -> bool {
elem.to_packed::<HtmlElem>()
.is_some_and(|elem| tag::is_inline_by_default(elem.tag))
}
|
