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Change ToCss to take a CssWriter<W>

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This more concrete wrapper type can write a prefix the very first time something
is written to it. This allows removing plenty of useless monomorphisations caused
by the former W/SequenceWriter<W> pair of types.
This commit is contained in:
Anthony Ramine 2018-01-22 19:58:01 +01:00
parent 3672856efa
commit cd8f96cc9e
89 changed files with 873 additions and 533 deletions
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20
components/style/values/generics/mod.rs
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@ -8,8 +8,9 @@
use counter_style::{Symbols, parse_counter_style_name};
use cssparser::Parser;
use parser::{Parse, ParserContext};
use std::fmt;
use style_traits::{Comma, OneOrMoreSeparated, ParseError, StyleParseErrorKind, ToCss};
use std::fmt::{self, Write};
use style_traits::{Comma, CssWriter, OneOrMoreSeparated, ParseError};
use style_traits::{StyleParseErrorKind, ToCss};
use super::CustomIdent;
pub mod background;
@ -144,7 +145,10 @@ impl<T> OneOrMoreSeparated for FontSettingTag<T> {
}
impl<T: ToCss> ToCss for FontSettingTag<T> {
fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result
where
W: Write,
{
use byteorder::{BigEndian, ByteOrder};
use std::str;
@ -231,7 +235,10 @@ pub struct FontSettingTagInt(pub u32);
pub struct FontSettingTagFloat(pub f32);
impl ToCss for FontSettingTagInt {
fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result
where
W: Write,
{
match self.0 {
1 => Ok(()),
0 => dest.write_str(" off"),
@ -273,7 +280,10 @@ impl Parse for FontSettingTagFloat {
}
impl ToCss for FontSettingTagFloat {
fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result
where
W: Write,
{
dest.write_str(" ")?;
self.0.to_css(dest)
}