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Extract write_children function

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This commit is contained in:
Laurenz 2025-06-23 14:35:52 +02:00
parent f8dc1ad3bd
commit c2e2fd99f6
1 changed files with 44 additions and 37 deletions
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81
crates/typst-html/src/encode.rs
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@ -28,7 +28,7 @@ struct Writer {
pretty: bool,
}
/// Write a newline and indent, if pretty printing is enabled.
/// Writes a newline and indent, if pretty printing is enabled.
fn write_indent(w: &mut Writer) {
if w.pretty {
w.buf.push('\n');
@ -38,7 +38,7 @@ fn write_indent(w: &mut Writer) {
}
}
/// Encode an HTML node into the writer.
/// Encodes an HTML node into the writer.
fn write_node(w: &mut Writer, node: &HtmlNode) -> SourceResult<()> {
match node {
HtmlNode::Tag(_) => {}
@ -49,7 +49,7 @@ fn write_node(w: &mut Writer, node: &HtmlNode) -> SourceResult<()> {
Ok(())
}
/// Encode plain text into the writer.
/// Encodes plain text into the writer.
fn write_text(w: &mut Writer, text: &str, span: Span) -> SourceResult<()> {
for c in text.chars() {
if charsets::is_valid_in_normal_element_text(c) {
@ -61,7 +61,7 @@ fn write_text(w: &mut Writer, text: &str, span: Span) -> SourceResult<()> {
Ok(())
}
/// Encode one element into the write.
/// Encodes one element into the writer.
fn write_element(w: &mut Writer, element: &HtmlElement) -> SourceResult<()> {
w.buf.push('<');
w.buf.push_str(&element.tag.resolve());
@ -95,41 +95,9 @@ fn write_element(w: &mut Writer, element: &HtmlElement) -> SourceResult<()> {
return Ok(());
}
let pretty = w.pretty;
if !element.children.is_empty() {
// See HTML spec § 13.1.2.5.
if element.tag == tag::pre && starts_with_newline(element) {
w.buf.push('\n');
}
let pretty_inside = allows_pretty_inside(element.tag)
&& element.children.iter().any(|node| match node {
HtmlNode::Element(child) => wants_pretty_around(child.tag),
_ => false,
});
w.pretty &= pretty_inside;
let mut indent = w.pretty;
w.level += 1;
for c in &element.children {
let pretty_around = match c {
HtmlNode::Tag(_) => continue,
HtmlNode::Element(child) => w.pretty && wants_pretty_around(child.tag),
HtmlNode::Text(..) | HtmlNode::Frame(_) => false,
};
if core::mem::take(&mut indent) || pretty_around {
write_indent(w);
}
write_node(w, c)?;
indent = pretty_around;
}
w.level -= 1;
write_indent(w);
write_children(w, element)?;
}
w.pretty = pretty;
w.buf.push_str("</");
w.buf.push_str(&element.tag.resolve());
@ -138,6 +106,45 @@ fn write_element(w: &mut Writer, element: &HtmlElement) -> SourceResult<()> {
Ok(())
}
/// Encodes the children of an element.
fn write_children(w: &mut Writer, element: &HtmlElement) -> SourceResult<()> {
// See HTML spec § 13.1.2.5.
if element.tag == tag::pre && starts_with_newline(element) {
w.buf.push('\n');
}
let pretty = w.pretty;
let pretty_inside = allows_pretty_inside(element.tag)
&& element.children.iter().any(|node| match node {
HtmlNode::Element(child) => wants_pretty_around(child.tag),
_ => false,
});
w.pretty &= pretty_inside;
let mut indent = w.pretty;
w.level += 1;
for c in &element.children {
let pretty_around = match c {
HtmlNode::Tag(_) => continue,
HtmlNode::Element(child) => w.pretty && wants_pretty_around(child.tag),
HtmlNode::Text(..) | HtmlNode::Frame(_) => false,
};
if core::mem::take(&mut indent) || pretty_around {
write_indent(w);
}
write_node(w, c)?;
indent = pretty_around;
}
w.level -= 1;
write_indent(w);
w.pretty = pretty;
Ok(())
}
/// Whether the first character in the element is a newline.
fn starts_with_newline(element: &HtmlElement) -> bool {
for child in &element.children {