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Auto merge of #15523 - heycam:rshint-style, r=bholley

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stylo: align RESTYLE_STYLE_ATTRIBUTE value with eRestyle_StyleAttribute

This is the Servo-side part of https://bugzilla.mozilla.org/show_bug.cgi?id=1338461, which @bholley reviewed.

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This commit is contained in:
bors-servo 2017-02-13 00:44:48 -08:00 • committed by GitHub
commit b8fcf127df
2 changed files with 31 additions and 10 deletions
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7
components/style/restyle_hints.rs
View file

@ -29,6 +29,11 @@ bitflags! {
/// id, class, and attribute selectors. Doing this conservatively is
/// expensive, and so we use RestyleHints to short-circuit work we know is
/// unnecessary.
///
/// Note that the bit values here must be kept in sync with the Gecko
/// nsRestyleHint values. If you add more bits with matching values,
/// please add assertions to assert_restyle_hints_match in
/// tests/unit/stylo/sanity_checks.rs.
pub flags RestyleHint: u32 {
/// Rerun selector matching on the element.
const RESTYLE_SELF = 0x01,
@ -46,7 +51,7 @@ bitflags! {
/// Don't re-run selector-matching on the element, only the style
/// attribute has changed, and this change didn't have any other
/// dependencies.
const RESTYLE_STYLE_ATTRIBUTE = 0x10,
const RESTYLE_STYLE_ATTRIBUTE = 0x80,
}
}

34
tests/unit/stylo/sanity_checks.rs
View file

@ -32,15 +32,31 @@ fn assert_restyle_hints_match() {
use style::restyle_hints::*; // For flags
use style::gecko_bindings::structs;
check_enum_value_non_static!(structs::nsRestyleHint_eRestyle_Self, RESTYLE_SELF.bits());
// XXX This for Servo actually means something like an hypothetical
// Restyle_AllDescendants (but without running selector matching on the
// element). ServoRestyleManager interprets it like that, but in practice we
// should align the behavior with Gecko adding a new restyle hint, maybe?
//
// See https://bugzilla.mozilla.org/show_bug.cgi?id=1291786
check_enum_value_non_static!(structs::nsRestyleHint_eRestyle_SomeDescendants, RESTYLE_DESCENDANTS.bits());
check_enum_value_non_static!(structs::nsRestyleHint_eRestyle_LaterSiblings, RESTYLE_LATER_SIBLINGS.bits());
macro_rules! check_restyle_hints {
( $( $a:ident => $b:ident ),*, ) => {
{
let mut hints = RestyleHint::all();
$(
check_enum_value_non_static!(structs::$a, $b.bits());
hints.remove($b);
)*
assert_eq!(hints, RestyleHint::empty(), "all RestyleHint bits should have an assertion");
}
}
}
check_restyle_hints! {
nsRestyleHint_eRestyle_Self => RESTYLE_SELF,
// XXX This for Servo actually means something like an hypothetical
// Restyle_AllDescendants (but without running selector matching on the
// element). ServoRestyleManager interprets it like that, but in practice we
// should align the behavior with Gecko adding a new restyle hint, maybe?
//
// See https://bugzilla.mozilla.org/show_bug.cgi?id=1291786
nsRestyleHint_eRestyle_SomeDescendants => RESTYLE_DESCENDANTS,
nsRestyleHint_eRestyle_LaterSiblings => RESTYLE_LATER_SIBLINGS,
nsRestyleHint_eRestyle_StyleAttribute => RESTYLE_STYLE_ATTRIBUTE,
}
}
// Note that we can't call each_pseudo_element, parse_pseudo_element, or