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Auto merge of #17636 - upsuper:bug1378814, r=emilio

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Don't return None in get_pseudo_style if not probing

This is the Servo side change of [bug 1378814](https://bugzilla.mozilla.org/show_bug.cgi?id=1378814).
This commit is contained in:
bors-servo 2017-07-07 16:11:50 -07:00 • committed by GitHub
commit 1425ad1bab
1 changed files with 18 additions and 19 deletions
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37
ports/geckolib/glue.rs
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@ -1589,25 +1589,24 @@ fn get_pseudo_style(
PseudoElementCascadeType::Eager => {
match *pseudo {
PseudoElement::FirstLetter => {
// inherited_styles can be None when doing lazy resolution
// (e.g. for computed style) or when probing. In that case
// we just inherit from our element, which is what Gecko
// does in that situation. What should actually happen in
// the computed style case is a bit unclear.
let inherited_styles =
inherited_styles.unwrap_or(styles.primary());
let guards = StylesheetGuards::same(guard);
let metrics = get_metrics_provider_for_product();
let inputs = match styles.pseudos.get(&pseudo) {
Some(styles) => CascadeInputs::new_from_style(styles),
None => return None,
};
doc_data.stylist
.compute_pseudo_element_style_with_inputs(
&inputs,
&guards,
inherited_styles,
&metrics)
styles.pseudos.get(&pseudo).and_then(|pseudo_styles| {
// inherited_styles can be None when doing lazy resolution
// (e.g. for computed style) or when probing. In that case
// we just inherit from our element, which is what Gecko
// does in that situation. What should actually happen in
// the computed style case is a bit unclear.
let inherited_styles =
inherited_styles.unwrap_or(styles.primary());
let guards = StylesheetGuards::same(guard);
let metrics = get_metrics_provider_for_product();
let inputs = CascadeInputs::new_from_style(pseudo_styles);
doc_data.stylist
.compute_pseudo_element_style_with_inputs(
&inputs,
&guards,
inherited_styles,
&metrics)
})
},
_ => {
debug_assert!(inherited_styles.is_none() ||