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style: Avoid creating element data in Servo_ResolvePseudoStyle.

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The reason the patch in bug 1402285 doesn't work is that we call this function
multiple times with the same element. This fixes it.

Bug: 1403465
Reviewed-by: bholley
MozReview-Commit-ID: Ko9zirCOzTR
Signed-off-by: Emilio Cobos Álvarez <emilio@crisal.io>
This commit is contained in:
Emilio Cobos Álvarez 2017-09-28 10:40:02 +02:00
parent 056c085119
commit 8789b91bd9
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GPG key ID: 056B727BB9C1027C
1 changed files with 20 additions and 10 deletions
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30
ports/geckolib/glue.rs
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@ -1772,21 +1772,31 @@ pub extern "C" fn Servo_ResolvePseudoStyle(element: RawGeckoElementBorrowed,
-> ServoStyleContextStrong
{
let element = GeckoElement(element);
let data = unsafe { element.ensure_data() };
let doc_data = PerDocumentStyleData::from_ffi(raw_data).borrow();
debug!("Servo_ResolvePseudoStyle: {:?} {:?}, is_probe: {}",
element, PseudoElement::from_pseudo_type(pseudo_type), is_probe);
// FIXME(bholley): Assert against this.
if !data.has_styles() {
warn!("Calling Servo_ResolvePseudoStyle on unstyled element");
return if is_probe {
Strong::null()
} else {
doc_data.default_computed_values().clone().into()
};
}
let data = element.borrow_data();
let data = match data.as_ref() {
Some(data) if data.has_styles() => data,
_ => {
// FIXME(bholley, emilio): Assert against this.
//
// Known offender is nsMathMLmoFrame::MarkIntrinsicISizesDirty,
// which goes and does a bunch of work involving style resolution.
//
// Bug 1403865 tracks fixing it, and potentially adding an assert
// here instead.
warn!("Calling Servo_ResolvePseudoStyle on unstyled element");
return if is_probe {
Strong::null()
} else {
doc_data.default_computed_values().clone().into()
};
}
};
let pseudo = PseudoElement::from_pseudo_type(pseudo_type)
.expect("ResolvePseudoStyle with a non-pseudo?");