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render footnotes

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This commit is contained in:
Noah Hellman 2023-01-18 22:30:24 +01:00
commit 8ccfb4c603
5 changed files with 406 additions and 14 deletions
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67
src/html.rs
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@ -48,25 +48,31 @@ enum Raw {
Other,
}
struct Writer<I, W> {
events: I,
struct Writer<I: Iterator, W> {
events: std::iter::Peekable<I>,
out: W,
raw: Raw,
text_only: bool,
encountered_footnote: bool,
footnote_number: Option<std::num::NonZeroUsize>,
footnote_backlink_written: bool,
}
impl<'s, I: Iterator<Item = Event<'s>>, W: std::fmt::Write> Writer<I, W> {
fn new(events: I, out: W) -> Self {
Self {
events,
events: events.peekable(),
out,
raw: Raw::None,
text_only: false,
encountered_footnote: false,
footnote_number: None,
footnote_backlink_written: false,
}
}
fn write(&mut self) -> std::fmt::Result {
for e in &mut self.events {
while let Some(e) = self.events.next() {
match e {
Event::Start(c, attrs) => {
if c.is_block() {
@ -81,7 +87,18 @@ impl<'s, I: Iterator<Item = Event<'s>>, W: std::fmt::Write> Writer<I, W> {
Container::ListItem => self.out.write_str("<li")?,
Container::DescriptionList => self.out.write_str("<dl")?,
Container::DescriptionDetails => self.out.write_str("<dd")?,
Container::Footnote { .. } => todo!(),
Container::Footnote { number, .. } => {
assert!(self.footnote_number.is_none());
self.footnote_number = Some((*number).try_into().unwrap());
if !self.encountered_footnote {
self.encountered_footnote = true;
self.out
.write_str("<section role=\"doc-endnotes\">\n<hr>\n<ol>\n")?;
}
write!(self.out, "<li id=\"fn{}\">", number)?;
self.footnote_backlink_written = false;
continue;
}
Container::Table => self.out.write_str("<table")?,
Container::TableRow => self.out.write_str("<tr")?,
Container::Div { .. } => self.out.write_str("<div")?,
@ -194,11 +211,36 @@ impl<'s, I: Iterator<Item = Event<'s>>, W: std::fmt::Write> Writer<I, W> {
Container::ListItem => self.out.write_str("</li>")?,
Container::DescriptionList => self.out.write_str("</dl>")?,
Container::DescriptionDetails => self.out.write_str("</dd>")?,
Container::Footnote { .. } => todo!(),
Container::Footnote { number, .. } => {
if !self.footnote_backlink_written {
write!(
self.out,
"\n<p><a href=\"#fnref{}\" role=\"doc-backlink\">↩︎︎</a></p>",
number,
)?;
}
self.out.write_str("\n</li>")?;
self.footnote_number = None;
}
Container::Table => self.out.write_str("</table>")?,
Container::TableRow => self.out.write_str("</tr>")?,
Container::Div { .. } => self.out.write_str("</div>")?,
Container::Paragraph => self.out.write_str("</p>")?,
Container::Paragraph => {
if let Some(num) = self.footnote_number {
if matches!(
self.events.peek(),
Some(Event::End(Container::Footnote { .. }))
) {
write!(
self.out,
r##"<a href="#fnref{}" role="doc-backlink">↩︎︎</a>"##,
num
)?;
self.footnote_backlink_written = true;
}
}
self.out.write_str("</p>")?;
}
Container::Heading { level } => write!(self.out, "</h{}>", level)?,
Container::TableCell => self.out.write_str("</td>")?,
Container::DescriptionTerm => self.out.write_str("</dt>")?,
@ -268,6 +310,13 @@ impl<'s, I: Iterator<Item = Event<'s>>, W: std::fmt::Write> Writer<I, W> {
}
Event::Atom(a) => match a {
Atom::FootnoteReference(_tag, number) => {
write!(
self.out,
r##"<a id="fnref{}" href="#fn{}" role="doc-noteref"><sup>{}</sup></a>"##,
number, number, number
)?;
}
Atom::Ellipsis => self.out.write_str("&hellip;")?,
Atom::EnDash => self.out.write_str("&ndash;")?,
Atom::EmDash => self.out.write_str("&mdash;")?,
@ -279,6 +328,10 @@ impl<'s, I: Iterator<Item = Event<'s>>, W: std::fmt::Write> Writer<I, W> {
},
}
}
if self.encountered_footnote {
self.out.write_str("\n</ol>\n</section>")?;
}
self.out.write_char('\n')?;
Ok(())
}
}