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style: Refactor media query serialization so it doesn't use an intermediate buffer.

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I plan to move MediaType to ToCss soon.
This commit is contained in:
Emilio Cobos Álvarez 2016-12-26 22:25:46 +01:00
parent b4caebae69
commit 8120906a15
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1 changed files with 12 additions and 9 deletions
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21
components/style/media_queries.rs
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@ -11,7 +11,7 @@ use app_units::Au;
use cssparser::{Delimiter, Parser, Token};
use euclid::size::{Size2D, TypedSize2D};
use serialize_comma_separated_list;
use std::fmt::{self, Write};
use std::fmt;
use style_traits::{ToCss, ViewportPx};
use values::computed::{self, ToComputedValue};
use values::specified;
@ -118,18 +118,21 @@ impl ToCss for MediaQuery {
try!(write!(dest, "not "));
}
let mut type_ = String::new();
match self.media_type {
MediaQueryType::All => try!(write!(type_, "all")),
MediaQueryType::Known(MediaType::Screen) => try!(write!(type_, "screen")),
MediaQueryType::Known(MediaType::Print) => try!(write!(type_, "print")),
MediaQueryType::Unknown(ref desc) => try!(write!(type_, "{}", desc)),
MediaQueryType::All => 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 write!(dest, "{}", type_)
} else if type_ != "all" || self.qualifier == Some(Qualifier::Not) {
try!(write!(dest, "{} and ", type_));
return Ok(());
}
if self.media_type != MediaQueryType::All || self.qualifier == Some(Qualifier::Not) {
try!(write!(dest, " and "));
}
for (i, &e) in self.expressions.iter().enumerate() {
try!(write!(dest, "("));
let (mm, l) = match e {