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style: Serialize also "only" qualifier, and fix serialization of all media expressions without explicit qualifiers.

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This commit is contained in:
Emilio Cobos Álvarez 2016-12-27 01:00:12 +01:00
parent bb672f1a2c
commit c04c3c60c3
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1 changed files with 29 additions and 9 deletions
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38
components/style/media_queries.rs
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@ -86,6 +86,17 @@ pub enum Qualifier {
Not,
}
impl ToCss for Qualifier {
fn to_css<W>(&self, dest: &mut W) -> fmt::Result
where W: fmt::Write
{
match *self {
Qualifier::Not => write!(dest, "not"),
Qualifier::Only => write!(dest, "only"),
}
}
}
#[derive(Clone, Debug, PartialEq)]
#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
pub struct MediaQuery {
@ -115,22 +126,32 @@ impl ToCss for MediaQuery {
fn to_css<W>(&self, dest: &mut W) -> fmt::Result
where W: fmt::Write
{
if self.qualifier == Some(Qualifier::Not) {
try!(write!(dest, "not "));
if let Some(qual) = self.qualifier {
try!(qual.to_css(dest));
try!(write!(dest, " "));
}
match self.media_type {
MediaQueryType::All => try!(write!(dest, "all")),
MediaQueryType::All => {
// We need to print "all" if there's a qualifier, or there's
// just an empty list of expressions.
//
// Otherwise, we'd serialize media queries like "(min-width:
// 40px)" in "all (min-width: 40px)", which is unexpected.
if self.qualifier.is_some() || self.expressions.is_empty() {
try!(write!(dest, "all"));
}
},
MediaQueryType::Known(MediaType::Screen) => try!(write!(dest, "screen")),
MediaQueryType::Known(MediaType::Print) => try!(write!(dest, "print")),
MediaQueryType::Unknown(ref desc) => try!(write!(dest, "{}", desc)),
};
}
if self.expressions.is_empty() {
return Ok(());
}
if self.media_type != MediaQueryType::All || self.qualifier == Some(Qualifier::Not) {
if self.media_type != MediaQueryType::All || self.qualifier.is_some() {
try!(write!(dest, " and "));
}
@ -143,10 +164,9 @@ impl ToCss for MediaQuery {
};
try!(write!(dest, "{}width: ", mm));
try!(l.to_css(dest));
if i == self.expressions.len() - 1 {
try!(write!(dest, ")"));
} else {
try!(write!(dest, ") and "));
try!(write!(dest, ")"));
if i != self.expressions.len() - 1 {
try!(write!(dest, " and "));
}
}
Ok(())