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stylo: Add -moz-element support

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Nazım Can Altınova 2017-04-08 20:25:34 +03:00
parent e0731215c0
commit 9618363e08
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5 changed files with 64 additions and 4 deletions
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30
components/style/values/specified/image.rs
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@ -7,7 +7,8 @@
//!
//! [image]: https://drafts.csswg.org/css-images/#image-values
use cssparser::Parser;
use Atom;
use cssparser::{Parser, Token, serialize_identifier};
use parser::{Parse, ParserContext};
#[cfg(feature = "servo")]
use servo_url::ServoUrl;
@ -28,6 +29,8 @@ pub enum Image {
Gradient(Gradient),
/// A `-moz-image-rect` image
ImageRect(ImageRect),
/// A `-moz-element(# <element-id>)`
Element(Atom),
}
impl ToCss for Image {
@ -36,6 +39,12 @@ impl ToCss for Image {
Image::Url(ref url_value) => url_value.to_css(dest),
Image::Gradient(ref gradient) => gradient.to_css(dest),
Image::ImageRect(ref image_rect) => image_rect.to_css(dest),
Image::Element(ref selector) => {
dest.write_str("-moz-element(#")?;
// FIXME: We should get rid of these intermediate strings.
serialize_identifier(&*selector.to_string(), dest)?;
dest.write_str(")")
},
}
}
}
@ -49,8 +58,11 @@ impl Image {
if let Ok(gradient) = input.try(|input| Gradient::parse_function(context, input)) {
return Ok(Image::Gradient(gradient));
}
if let Ok(image_rect) = input.try(|input| ImageRect::parse(context, input)) {
return Ok(Image::ImageRect(image_rect));
}
Ok(Image::ImageRect(ImageRect::parse(context, input)?))
Ok(Image::Element(Image::parse_element(input)?))
}
/// Creates an already specified image value from an already resolved URL
@ -59,6 +71,20 @@ impl Image {
pub fn for_cascade(url: ServoUrl) -> Self {
Image::Url(SpecifiedUrl::for_cascade(url))
}
/// Parses a `-moz-element(# <element-id>)`.
fn parse_element(input: &mut Parser) -> Result<Atom, ()> {
if input.try(|i| i.expect_function_matching("-moz-element")).is_ok() {
input.parse_nested_block(|i| {
match i.next()? {
Token::IDHash(id) => Ok(Atom::from(id)),
_ => Err(()),
}
})
} else {
Err(())
}
}
}
/// Specified values for a CSS gradient.