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media_element: Simplify parsing of MediaElement.

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This commit is contained in:
Emmanuel Gil Peyrot 2017-11-24 04:48:31 +00:00
parent 6533395ec3
commit 80a2f425e2
1 changed files with 9 additions and 40 deletions
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49
src/media_element.rs
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@ -20,46 +20,15 @@ generate_element_with_text!(URI, "uri", ns::MEDIA_ELEMENT,
uri: TrimmedPlainText<String>
);
#[derive(Debug, Clone)]
pub struct MediaElement {
pub width: Option<usize>,
pub height: Option<usize>,
pub uris: Vec<URI>,
}
impl TryFrom<Element> for MediaElement {
type Err = Error;
fn try_from(elem: Element) -> Result<MediaElement, Error> {
check_self!(elem, "media", ns::MEDIA_ELEMENT);
check_no_unknown_attributes!(elem, "media", ["width", "height"]);
let mut media = MediaElement {
width: get_attr!(elem, "width", optional),
height: get_attr!(elem, "height", optional),
uris: vec!(),
};
for child in elem.children() {
if child.is("uri", ns::MEDIA_ELEMENT) {
media.uris.push(URI::try_from(child.clone())?);
} else {
return Err(Error::ParseError("Unknown child in media element."));
}
}
Ok(media)
}
}
impl From<MediaElement> for Element {
fn from(media: MediaElement) -> Element {
Element::builder("media")
.ns(ns::MEDIA_ELEMENT)
.attr("width", media.width)
.attr("height", media.height)
.append(media.uris)
.build()
}
}
generate_element_with_children!(MediaElement, "media", ns::MEDIA_ELEMENT,
attributes: [
width: Option<usize> = "width" => optional,
height: Option<usize> = "height" => optional
],
children: [
uris: Vec<URI> = ("uri", ns::MEDIA_ELEMENT) => URI
]
);
#[cfg(test)]
mod tests {