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xhtml: Move Body out of Tag, because it is the only top-level element.

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This commit is contained in:
Emmanuel Gil Peyrot 2019-08-25 20:02:33 +02:00
parent 2f45d586b5
commit 63d0265284
1 changed files with 80 additions and 55 deletions
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135
src/xhtml.rs
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@ -18,7 +18,7 @@ type Lang = String;
#[derive(Debug, Clone)]
pub struct XhtmlIm {
/// Map of language to body element.
bodies: HashMap<Lang, Tag>,
bodies: HashMap<Lang, Body>,
}
impl XhtmlIm {
@ -27,22 +27,41 @@ impl XhtmlIm {
let mut html = Vec::new();
// TODO: use the best language instead.
for (lang, body) in self.bodies {
if let Tag::Body { style: _, xml_lang, children } = body {
if lang.is_empty() {
assert!(xml_lang.is_none());
} else {
assert_eq!(Some(lang), xml_lang);
}
for tag in children {
html.push(tag.to_html());
}
break;
if lang.is_empty() {
assert!(body.xml_lang.is_none());
} else {
unreachable!();
assert_eq!(Some(lang), body.xml_lang);
}
for tag in body.children {
html.push(tag.to_html());
}
break;
}
html.concat()
}
/// Removes all unknown elements.
pub fn flatten(self) -> XhtmlIm {
let mut bodies = HashMap::new();
for (lang, body) in self.bodies {
let children = body.children.into_iter().fold(vec![], |mut acc, child| {
match child {
Child::Tag(Tag::Unknown(children)) => acc.extend(children),
any => acc.push(any),
}
acc
});
let body = Body {
style: body.style,
xml_lang: body.xml_lang,
children,
};
bodies.insert(lang, body);
}
XhtmlIm {
bodies,
}
}
}
impl MessagePayload for XhtmlIm {}
@ -62,7 +81,7 @@ impl TryFrom<Element> for XhtmlIm {
Some(lang) => lang,
None => "",
}.to_string();
let body = Tag::try_from(child)?;
let body = Body::try_from(child)?;
match bodies.insert(lang, body) {
None => (),
Some(_) => return Err(Error::ParseError("Two identical language bodies found in XHTML-IM."))
@ -81,16 +100,12 @@ impl From<XhtmlIm> for Element {
Element::builder("html")
.ns(ns::XHTML_IM)
.append(wrapper.bodies.into_iter().map(|(ref lang, ref body)| {
if let Tag::Body { style, xml_lang, children } = body {
assert_eq!(Some(lang), xml_lang.as_ref());
Element::builder("body")
.ns(ns::XHTML_IM)
.attr("style", get_style_string(style.clone()))
.attr("xml:lang", xml_lang.clone())
.append(children_to_nodes(children.clone()))
} else {
unreachable!();
}
assert_eq!(Some(lang), body.xml_lang.as_ref());
Element::builder("body")
.ns(ns::XHTML_IM)
.attr("style", get_style_string(body.style.clone()))
.attr("xml:lang", body.xml_lang.clone())
.append(children_to_nodes(body.children.clone()))
}).collect::<Vec<_>>())
.build()
}
@ -130,11 +145,45 @@ fn get_style_string(style: Css) -> Option<String> {
Some(result.join("; "))
}
#[derive(Debug, Clone)]
struct Body {
style: Css,
xml_lang: Option<String>,
children: Vec<Child>,
}
impl TryFrom<Element> for Body {
type Error = Error;
fn try_from(elem: Element) -> Result<Body, Error> {
let mut children = vec![];
for child in elem.nodes() {
match child {
Node::Element(child) => children.push(Child::Tag(Tag::try_from(child.clone())?)),
Node::Text(text) => children.push(Child::Text(text.clone())),
Node::Comment(_) => unimplemented!() // XXX: remove!
}
}
Ok(Body { style: parse_css(elem.attr("style")), xml_lang: elem.attr("xml:lang").map(|xml_lang| xml_lang.to_string()), children })
}
}
impl From<Body> for Element {
fn from(body: Body) -> Element {
Element::builder("body")
.ns(ns::XHTML)
.attr("style", get_style_string(body.style))
.attr("xml:lang", body.xml_lang)
.append(children_to_nodes(body.children))
.build()
}
}
#[derive(Debug, Clone)]
enum Tag {
A { href: Option<String>, style: Css, type_: Option<String>, children: Vec<Child> },
Blockquote { style: Css, children: Vec<Child> },
Body { style: Css, xml_lang: Option<String>, children: Vec<Child> },
Br,
Cite { style: Css, children: Vec<Child> },
Em { children: Vec<Child> },
@ -161,10 +210,6 @@ impl Tag {
let style = write_attr(get_style_string(style), "style");
format!("<blockquote{}>{}</blockquote>", style, children_to_html(children))
},
Tag::Body { style, xml_lang: _, children } => {
let style = write_attr(get_style_string(style), "style");
format!("<body{}>{}</body>", style, children_to_html(children))
},
Tag::Br => String::from("<br>"),
Tag::Cite { style, children } => {
let style = write_attr(get_style_string(style), "style");
@ -218,7 +263,6 @@ impl TryFrom<Element> for Tag {
Ok(match elem.name() {
"a" => Tag::A { href: elem.attr("href").map(|href| href.to_string()), style: parse_css(elem.attr("style")), type_: elem.attr("type").map(|type_| type_.to_string()), children },
"blockquote" => Tag::Blockquote { style: parse_css(elem.attr("style")), children },
"body" => Tag::Body { style: parse_css(elem.attr("style")), xml_lang: elem.attr("xml:lang").map(|xml_lang| xml_lang.to_string()), children },
"br" => Tag::Br,
"cite" => Tag::Cite { style: parse_css(elem.attr("style")), children },
"em" => Tag::Em { children },
@ -254,16 +298,6 @@ impl From<Tag> for Element {
Some(style) => vec![("style", style)],
None => vec![],
}, children),
Tag::Body { style, xml_lang, children } => ("body", {
let mut attrs = vec![];
if let Some(style) = get_style_string(style) {
attrs.push(("style", style));
}
if let Some(xml_lang) = xml_lang {
attrs.push(("xml:lang", xml_lang));
}
attrs
}, children),
Tag::Br => ("br", vec![], vec![]),
Tag::Cite { style, children } => ("cite", match get_style_string(style) {
Some(style) => vec![("style", style)],
@ -405,26 +439,17 @@ mod tests {
let elem: Element = "<body xmlns='http://www.w3.org/1999/xhtml'/>"
.parse()
.unwrap();
let body = Tag::try_from(elem).unwrap();
match body {
Tag::Body { style: _, xml_lang: _, children } => assert_eq!(children.len(), 0),
_ => panic!(),
}
let body = Body::try_from(elem).unwrap();
assert_eq!(body.children.len(), 0);
let elem: Element = "<body xmlns='http://www.w3.org/1999/xhtml'><p>Hello world!</p></body>"
.parse()
.unwrap();
let body = Tag::try_from(elem).unwrap();
let mut children = match body {
Tag::Body { style, xml_lang, children } => {
assert_eq!(style.len(), 0);
assert_eq!(xml_lang, None);
assert_eq!(children.len(), 1);
children
},
_ => panic!(),
};
let p = match children.pop() {
let mut body = Body::try_from(elem).unwrap();
assert_eq!(body.style.len(), 0);
assert_eq!(body.xml_lang, None);
assert_eq!(body.children.len(), 1);
let p = match body.children.pop() {
Some(Child::Tag(tag)) => tag,
_ => panic!(),
};