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Support unit variants when deriving ToCss

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This commit is contained in:
Anthony Ramine 2017-06-07 14:53:31 +02:00
parent 7d09ce0495
commit 45e8b0e8c7
14 changed files with 71 additions and 242 deletions
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11
components/style_traits/values.rs
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@ -8,8 +8,15 @@ use app_units::Au;
use cssparser::UnicodeRange;
use std::fmt;
/// The real `ToCss` trait can't be implemented for types in crates that don't
/// depend on each other.
/// Serialises a value according to its CSS representation.
///
/// This trait is derivable with `#[derive(ToCss)]`, with the following behaviour:
/// * unit variants get serialised as the `snake-case` representation
/// of their name;
/// * unit variants whose name starts with "Moz" or "Webkit" are prepended
/// with a "-";
/// * variants with fields get serialised as the space-separated serialisations
/// of their fields.
pub trait ToCss {
/// Serialize `self` in CSS syntax, writing to `dest`.
fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write;