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Recreate style context only if the element was restyled during the traversal.

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This commit is contained in:
Hiroyuki Ikezoe 2017-07-15 11:18:38 +09:00
parent e700a66e9f
commit dddea0cd94
1 changed files with 8 additions and 2 deletions
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10
ports/geckolib/glue.rs
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@ -257,7 +257,7 @@ pub extern "C" fn Servo_TraverseSubtree(root: RawGeckoElementBorrowed,
debug_assert!(!snapshots.is_null());
let element = GeckoElement(root);
debug!("Servo_TraverseSubtree: {:?}", element);
debug!("Servo_TraverseSubtree: {:?} {:?}", element, restyle_behavior);
let traversal_flags = match (root_behavior, restyle_behavior) {
(Root::Normal, Restyle::Normal) |
@ -2730,11 +2730,16 @@ pub extern "C" fn Servo_NoteExplicitHints(element: RawGeckoElementBorrowed,
#[no_mangle]
pub extern "C" fn Servo_TakeChangeHint(element: RawGeckoElementBorrowed,
restyle_behavior: structs::TraversalRestyleBehavior) -> nsChangeHint
restyle_behavior: structs::TraversalRestyleBehavior,
was_restyled: *mut bool) -> nsChangeHint
{
let mut was_restyled = unsafe { was_restyled.as_mut().unwrap() };
let element = GeckoElement(element);
let damage = match element.mutate_data() {
Some(mut data) => {
*was_restyled = data.restyle.is_restyle();
let damage = data.restyle.damage;
if restyle_behavior == structs::TraversalRestyleBehavior::ForThrottledAnimationFlush {
debug_assert!(data.restyle.is_restyle() || damage.is_empty(),
@ -2754,6 +2759,7 @@ pub extern "C" fn Servo_TakeChangeHint(element: RawGeckoElementBorrowed,
}
None => {
warn!("Trying to get change hint from unstyled element");
*was_restyled = false;
GeckoRestyleDamage::empty()
}
};