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layout: Add line height from preserved segment breaks in quirks mode (#31419)

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In quirks mode, preserved segment breaks should add line height to
lines. This matches the behavior of WebKit and Blink, but not Gecko.

This also handles the special-case of `<br>` elements, which are
implemented with preserved segment breaks via `white-space: pre-line`.
This is an implementation detail though because `<br>` has a special
behavior if the line isn't empty -- it doesn't add any line height in
this case.
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Martin Robinson 2024-02-26 18:26:41 +01:00 • committed by GitHub
parent a9a7e8a5cf
commit e5598590ba
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12 changed files with 158 additions and 10 deletions
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4
components/layout_2020/fragment_tree/base_fragment.rs
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@ -77,8 +77,10 @@ bitflags! {
/// Flags used to track various information about a DOM node during layout.
#[derive(Clone, Copy, Debug, Serialize)]
pub(crate) struct FragmentFlags: u8 {
/// Whether or not this node is a body element on an HTML document.
/// Whether or not the node that created this fragment is a `<body>` element on an HTML document.
const IS_BODY_ELEMENT_OF_HTML_ELEMENT_ROOT = 0b00000001;
/// Whether or not the node that created this Fragment is a `<br>` element.
const IS_BR_ELEMENT = 0b00000010;
}
}