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Detect body elements during layout

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During layout it is often useful, for various specification reasons, to
know if an element is the `<body>` element of an `<html>` element root. There
are a couple places where a brittle heuristic is used to detect `<body>`
elements. This information is going to be even more important to
properly handle `<html>` elements that inherit their overflow property from
their `<body>` children.

Implementing this properly requires updating the DOM wrapper interface.
This check does reach up to the parent of thread-safe nodes, but this is
essentially the same kind of operation that `parent_style()` does, so is
ostensibly safe.

This change should not change any behavior and is just a preparation
step for properly handle `<body>` overflow.
This commit is contained in:
Martin Robinson 2023-04-30 20:21:58 +02:00
parent 77a184a0e7
commit 72302e2dae
26 changed files with 487 additions and 277 deletions
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3
components/layout_2020/flexbox/construct.rs
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@ -10,7 +10,6 @@ use crate::dom_traversal::{
};
use crate::element_data::LayoutBox;
use crate::formatting_contexts::IndependentFormattingContext;
use crate::fragments::Tag;
use crate::positioned::AbsolutelyPositionedBox;
use crate::style_ext::DisplayGeneratingBox;
use rayon::iter::{IntoParallelIterator, ParallelIterator};
@ -150,7 +149,7 @@ where
.info
.new_replacing_style(anonymous_style.clone().unwrap()),
runs.into_iter().map(|run| crate::flow::inline::TextRun {
tag: Tag::from_node_and_style_info(&run.info),
base_fragment_info: (&run.info).into(),
text: run.text.into(),
parent_style: run.info.style,
}),