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style: Support multiple track sizes for grid-auto-{columns|rows}.

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Support `<track-size>+` on the implicit track sizing properties,
grid-auto-columns and grid-auto-rows.

Differential Revision: https://phabricator.services.mozilla.com/D38408
This commit is contained in:
Boris Chiou 2019-08-06 18:32:16 +00:00 • committed by Emilio Cobos Álvarez
parent 69191d8b8c
commit 29f6db4d16
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GPG key ID: E1152D0994E4BF8A
6 changed files with 76 additions and 22 deletions
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19
components/style/values/specified/grid.rs
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@ -6,8 +6,8 @@
//! [grids](https://drafts.csswg.org/css-grid/)
use crate::parser::{Parse, ParserContext};
use crate::values::generics::grid::{GridTemplateComponent, RepeatCount, TrackBreadth};
use crate::values::generics::grid::{LineNameList, TrackRepeat, TrackSize};
use crate::values::generics::grid::{GridTemplateComponent, ImplicitGridTracks, RepeatCount};
use crate::values::generics::grid::{LineNameList, TrackBreadth, TrackRepeat, TrackSize};
use crate::values::generics::grid::{TrackList, TrackListValue};
use crate::values::specified::{Integer, LengthPercentage};
use crate::values::{CSSFloat, CustomIdent};
@ -95,6 +95,21 @@ impl Parse for TrackSize<LengthPercentage> {
}
}
impl Parse for ImplicitGridTracks<TrackSize<LengthPercentage>> {
fn parse<'i, 't>(
context: &ParserContext,
input: &mut Parser<'i, 't>,
) -> Result<Self, ParseError<'i>> {
use style_traits::{Separator, Space};
let track_sizes = Space::parse(input, |i| TrackSize::parse(context, i))?;
if track_sizes.len() == 1 && track_sizes[0].is_auto() {
//`auto`, which is the initial value, is always represented by an empty slice.
return Ok(Default::default());
}
return Ok(ImplicitGridTracks(track_sizes.into()));
}
}
/// Parse the grid line names into a vector of owned strings.
///
/// <https://drafts.csswg.org/css-grid/#typedef-line-names>