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style: Add contain:size and contain:content parsing functionality.

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Bug: 1463589
Reviewed-by: emilio
MozReview-Commit-ID: 4fOqln3oOpC
This commit is contained in:
Morgan Rae Reschenberg 2018-05-30 07:49:31 -07:00 • committed by Emilio Cobos Álvarez
parent 5507d53611
commit 0bfd1dc5c0
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GPG key ID: 056B727BB9C1027C
2 changed files with 50 additions and 10 deletions
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24
components/style/values/specified/box.rs
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@ -525,19 +525,25 @@ pub fn assert_touch_action_matches() {
bitflags! {
#[derive(MallocSizeOf, SpecifiedValueInfo, ToComputedValue)]
#[value_info(other_values = "none,strict,layout,style,paint")]
#[value_info(other_values = "none,strict,content,size,layout,style,paint")]
/// Constants for contain: https://drafts.csswg.org/css-contain/#contain-property
pub struct Contain: u8 {
/// 'size' variant, turns on size containment
const SIZE = 0x01;
/// `layout` variant, turns on layout containment
const LAYOUT = 0x01;
const LAYOUT = 0x02;
/// `style` variant, turns on style containment
const STYLE = 0x02;
const STYLE = 0x04;
/// `paint` variant, turns on paint containment
const PAINT = 0x04;
const PAINT = 0x08;
/// `strict` variant, turns on all types of containment
const STRICT = 0x8;
const STRICT = 0x10;
/// 'content' variant, turns on style, layout, and paint containment
const CONTENT = 0x20;
/// variant with all the bits that contain: strict turns on
const STRICT_BITS = Contain::LAYOUT.bits | Contain::STYLE.bits | Contain::PAINT.bits;
const STRICT_BITS = Contain::LAYOUT.bits | Contain::STYLE.bits | Contain::PAINT.bits | Contain::SIZE.bits;
/// variant with all the bits that contain: content turns on
const CONTENT_BITS = Contain::STYLE.bits | Contain::LAYOUT.bits | Contain::PAINT.bits;
}
}
@ -552,6 +558,9 @@ impl ToCss for Contain {
if self.contains(Contain::STRICT) {
return dest.write_str("strict");
}
if self.contains(Contain::CONTENT) {
return dest.write_str("content");
}
let mut has_any = false;
macro_rules! maybe_write_value {
@ -565,6 +574,7 @@ impl ToCss for Contain {
}
};
}
maybe_write_value!(Contain::SIZE => "size");
maybe_write_value!(Contain::LAYOUT => "layout");
maybe_write_value!(Contain::STYLE => "style");
maybe_write_value!(Contain::PAINT => "paint");
@ -583,10 +593,12 @@ impl Parse for Contain {
let mut result = Contain::empty();
while let Ok(name) = input.try(|i| i.expect_ident_cloned()) {
let flag = match_ignore_ascii_case! { &name,
"size" => Some(Contain::SIZE),
"layout" => Some(Contain::LAYOUT),
"style" => Some(Contain::STYLE),
"paint" => Some(Contain::PAINT),
"strict" if result.is_empty() => return Ok(Contain::STRICT | Contain::STRICT_BITS),
"content" if result.is_empty() => return Ok(Contain::CONTENT | Contain::CONTENT_BITS),
"none" if result.is_empty() => return Ok(result),
_ => None
};