diff options
Diffstat (limited to 'components/style_traits/values.rs')
| -rw-r--r-- | components/style_traits/values.rs | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/components/style_traits/values.rs b/components/style_traits/values.rs index aaff1a998ea..7c73f7bd4cf 100644 --- a/components/style_traits/values.rs +++ b/components/style_traits/values.rs @@ -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; |