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Move match and cascade temporaries to CurrentElementInfo

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Before this change, the `ComputedStyle` struct that is part of permanent style
data per element holds 2 `StrongRuleNode`s (unvisited and visited) and 2
`Arc<ComputedValues>` (unvisited and visited).

Both rule nodes and the visited values don't actually need to be here.  This
patch moves these 3 to new temporary storage in `CascadeInputs` on
`CurrentElementInfo` during the match and cascade process.  Rule nodes are
pushed down inside the `ComputedValues` for later access after the cascade.
(Visited values were already available there.)

The permanent style data per element now has just the `Arc<ComputedValues>` for
itself and eager pseudo-elements (plus the `RestyleHint`).

MozReview-Commit-ID: 3wq52ERMpdi
This commit is contained in:
J. Ryan Stinnett 2017-06-13 12:51:37 -05:00
parent c3b2a2f4de
commit 2b5c56e6a8
19 changed files with 738 additions and 746 deletions
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2
components/style/rule_tree/mod.rs
View file

@ -1169,7 +1169,7 @@ impl StrongRuleNode {
};
let parent_data = element.mutate_data().unwrap();
let parent_rule_node = parent_data.styles().primary.rules.clone();
let parent_rule_node = parent_data.styles.primary().rules().clone();
element_rule_node = Cow::Owned(parent_rule_node);
properties = inherited_properties;