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style: Add a style flag for the root element style.

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This is needed to make the root element not a containing block in presence of
filters or what not.

Differential Revision: https://phabricator.services.mozilla.com/D61167
This commit is contained in:
Emilio Cobos Álvarez 2020-01-31 14:51:06 +00:00
parent f426b644ca
commit 16fd7cad0c
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13 changed files with 37 additions and 46 deletions
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6
components/style/properties/cascade.rs
View file

@ -263,8 +263,11 @@ where
builder.build()
};
let is_root_element =
pseudo.is_none() && element.map_or(false, |e| e.is_root());
let mut context = computed::Context {
is_root_element: pseudo.is_none() && element.map_or(false, |e| e.is_root()),
// We'd really like to own the rules here to avoid refcount traffic, but
// animation's usage of `apply_declarations` make this tricky. See bug
// 1375525.
@ -275,6 +278,7 @@ where
pseudo,
Some(rules.clone()),
custom_properties,
is_root_element,
),
cached_system_font: None,
in_media_query: false,