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Bug 1355343: Take all the snapshots into account. r=bholley

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I've chosen this approach mainly because there's no other good way to guarantee
the model is correct than holding the snapshots alive until a style refresh.

What I tried before this (storing them in a sort of "immutable element data") is
a pain, since we call into style from the frame constructor and other content
notifications, which makes keeping track of which snapshots should be cleared an
which shouldn't an insane task.

Ideally we'd have a single entry-point for style, but that's not the case right
now, and changing that requires pretty non-trivial changes to the frame
constructor.

MozReview-Commit-ID: FF1KWZv2iBM
Signed-off-by: Emilio Cobos Álvarez <emilio@crisal.io>
This commit is contained in:
Emilio Cobos Álvarez 2017-05-07 16:36:47 +02:00
parent 7d45aad9b4
commit 46bf5d61f0
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GPG key ID: 056B727BB9C1027C
16 changed files with 439 additions and 308 deletions
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10
components/style/stylist.rs
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@ -22,7 +22,7 @@ use properties::INHERIT_ALL;
use properties::PropertyDeclarationBlock;
use restyle_hints::{RestyleHint, DependencySet};
use rule_tree::{CascadeLevel, RuleTree, StrongRuleNode, StyleSource};
use selector_parser::{SelectorImpl, PseudoElement, Snapshot};
use selector_parser::{SelectorImpl, PseudoElement, SnapshotMap};
use selectors::Element;
use selectors::bloom::BloomFilter;
use selectors::matching::{AFFECTED_BY_STYLE_ATTRIBUTE, AFFECTED_BY_PRESENTATIONAL_HINTS};
@ -894,16 +894,16 @@ impl Stylist {
results
}
/// Given an element, and a snapshot that represents a previous state of the
/// element, compute the appropriate restyle hint, that is, the kind of
/// Given an element, and a snapshot table that represents a previous state
/// of the tree, compute the appropriate restyle hint, that is, the kind of
/// restyle we need to do.
pub fn compute_restyle_hint<E>(&self,
element: &E,
snapshot: &Snapshot)
snapshots: &SnapshotMap)
-> RestyleHint
where E: TElement,
{
self.dependencies.compute_hint(element, snapshot)
self.dependencies.compute_hint(element, snapshots)
}
/// Computes styles for a given declaration with parent_style.