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cd8f96cc9e
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.
47 lines
1.2 KiB
Rust
47 lines
1.2 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//! Generic types for counters-related CSS values.
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use std::fmt;
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use style_traits::{CssWriter, ToCss};
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use values::CustomIdent;
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/// A generic value for the `counter-increment` property.
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///
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/// Keyword `none` is represented by an empty slice.
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#[derive(Clone, Debug, PartialEq, ToComputedValue)]
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pub struct CounterIncrement<Integer>(Box<[(CustomIdent, Integer)]);
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impl<I> CounterIncrement<I> {
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/// Returns `none`.
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#[inline]
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pub fn none() -> Self {
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CounterIncrement(vec![].into_boxed_slice())
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}
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}
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impl<I> ToCss for CounterIncrement<I>
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where
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I: ToCss,
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{
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#[inline]
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fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result
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where
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W: fmt::Write,
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{
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if self.0.is_empty() {
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return dest.write_str("none");
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}
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for (&(ref name, ref value), i) in self.0.iter().enumerate() {
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if i != 0 {
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dest.write_str(" ")?;
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}
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name.to_css(dest)?;
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dest.write_str(" ")?;
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value.to_css(dest)?;
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}
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Ok(())
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}
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}
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