Mirrors/servo
1
0
Fork 0
mirror of https://github.com/servo/servo.git synced 2025-08-06 06:00:15 +01:00
Code Issues Projects Releases Packages Wiki Activity

style: Implement a version of #[css(skip_if)] that takes more context.

Browse source 
I called it contextual_skip_if, though better names welcome.

Differential Revision: https://phabricator.services.mozilla.com/D21858
This commit is contained in:
Emilio Cobos Álvarez 2019-03-03 11:31:06 +00:00
parent 94686df11b
commit 35b8b95263
2 changed files with 24 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

22
components/style_derive/to_css.rs
View file

@ -148,12 +148,20 @@ fn derive_variant_fields_expr(
}
}
}
if let Some(condition) = attrs.contextual_skip_if {
expr = quote! {
if !#condition(#(#bindings),*) {
#expr
}
}
}
return expr;
}
let mut expr = derive_single_field_expr(first, attrs, where_clause);
let mut expr = derive_single_field_expr(first, attrs, where_clause, bindings);
for (binding, attrs) in iter {
derive_single_field_expr(binding, attrs, where_clause).to_tokens(&mut expr)
derive_single_field_expr(binding, attrs, where_clause, bindings).to_tokens(&mut expr)
}
quote! {{
@ -167,6 +175,7 @@ fn derive_single_field_expr(
field: &BindingInfo,
attrs: CssFieldAttrs,
where_clause: &mut Option<WhereClause>,
bindings: &[BindingInfo],
) -> TokenStream {
let mut expr = if attrs.iterable {
if let Some(if_empty) = attrs.if_empty {
@ -216,6 +225,14 @@ fn derive_single_field_expr(
}
}
if let Some(condition) = attrs.contextual_skip_if {
expr = quote! {
if !#condition(#(#bindings),*) {
#expr
}
}
}
expr
}
@ -249,5 +266,6 @@ pub struct CssFieldAttrs {
pub iterable: bool,
pub skip: bool,
pub represents_keyword: bool,
pub contextual_skip_if: Option<Path>,
pub skip_if: Option<Path>,
}