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Auto merge of #19163 - emilio:useless-opt, r=nox

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style: Remove the skip_applying_damage "optimization".

We already remove all change hints down the tree when finding a reframe hint
using ClearServoRestyleFromSubtree in ServoRestyleManager, so this is useless.

MozReview-Commit-ID: 1twx7iPt79x

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This commit is contained in:
bors-servo 2017-11-09 08:25:25 -06:00 • committed by GitHub
commit 20ccde9a75
2 changed files with 1 additions and 20 deletions
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14
components/style/data.rs
View file

@ -466,20 +466,6 @@ impl ElementData {
self.is_restyle() || !self.hint.is_empty() || !self.damage.is_empty()
}
/// If an ancestor is already getting reconstructed by Gecko's top-down
/// frame constructor, no need to apply damage. Similarly if we already
/// have an explicitly stored ReconstructFrame hint.
///
/// See https://bugzilla.mozilla.org/show_bug.cgi?id=1301258#c12
/// for followup work to make the optimization here more optimal by considering
/// each bit individually.
#[cfg(feature = "gecko")]
pub fn skip_applying_damage(&self) -> bool { self.reconstructed_self_or_ancestor() }
/// N/A in Servo.
#[cfg(feature = "servo")]
pub fn skip_applying_damage(&self) -> bool { false }
/// Returns whether it is safe to perform cousin sharing based on the ComputedValues
/// identity of the primary style in this ElementData. There are a few subtle things
/// to check.

7
components/style/matching.rs
View file

@ -333,7 +333,6 @@ trait PrivateMatchMethods: TElement {
fn accumulate_damage_for(
&self,
shared_context: &SharedStyleContext,
skip_applying_damage: bool,
damage: &mut RestyleDamage,
old_values: &ComputedValues,
new_values: &ComputedValues,
@ -345,9 +344,7 @@ trait PrivateMatchMethods: TElement {
let difference =
self.compute_style_difference(old_values, new_values, pseudo);
if !skip_applying_damage {
*damage |= difference.damage;
}
*damage |= difference.damage;
debug!(" > style difference: {:?}", difference);
@ -590,7 +587,6 @@ pub trait MatchMethods : TElement {
cascade_requirement,
self.accumulate_damage_for(
context.shared,
data.skip_applying_damage(),
&mut data.damage,
&old_primary_style,
new_primary_style,
@ -612,7 +608,6 @@ pub trait MatchMethods : TElement {
(&Some(ref old), &Some(ref new)) => {
self.accumulate_damage_for(
context.shared,
data.skip_applying_damage(),
&mut data.damage,
old,
new,