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Implement shrink-to-fit for abspos

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This commit is contained in:
Simon Sapin 2019-12-03 13:12:40 +01:00
parent efa1885e1b
commit 46f0f7d7e2
5 changed files with 48 additions and 15 deletions
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22
components/layout_2020/sizing.rs
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@ -65,10 +65,7 @@ pub(crate) fn outer_inline_content_sizes_and_percentages(
let specified = specified.map(|lp| lp.as_length());
// The (inner) min/max-content are only used for 'auto'
let mut outer = match specified.non_auto().flatten() {
None => inner_content_sizes
.as_ref()
.expect("Accessing content size that was not requested")
.clone(),
None => expect(inner_content_sizes).clone(),
Some(length) => ContentSizes {
min_content: length,
max_content: length,
@ -96,3 +93,20 @@ pub(crate) fn outer_inline_content_sizes_and_percentages(
(outer, pbm_percentages)
}
/// https://drafts.csswg.org/css2/visudet.html#shrink-to-fit-float
pub(crate) fn shrink_to_fit(
content_sizes: &Option<ContentSizes>,
available_size: Length,
) -> Length {
let content_sizes = expect(content_sizes);
available_size
.max(content_sizes.min_content)
.min(content_sizes.max_content)
}
fn expect(content_sizes: &Option<ContentSizes>) -> &ContentSizes {
content_sizes
.as_ref()
.expect("Accessing content size that was not requested")
}