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style: Propagate changes in custom properties' computed values to descendants.

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If ComputedValues.custom_properties differs between the old and new
ComputedValues, indicate that we have to propogate changes to
descendants by setting child_cascade_requirement to
MustCascadeDescendants in cascade_primary.

style::matching::TElement::cascade_primary already calls
accumulate_damage, which eventually calls
ServoRestyleDamage::compute_style_difference in order to check if other
properties' computed values changed. If any of those change, we signal
that we need to propogate changes for inherited properties.

With Properties & Values, some custom properties will not be inherited,
and we will need to revisit this.
This commit is contained in:
Jonathan Chan 2017-06-12 15:03:25 -07:00
parent c1ea54d3c4
commit 32f62a5ac6
5 changed files with 57 additions and 2 deletions
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10
tests/wpt/mozilla/meta/MANIFEST.json
View file

@ -19992,6 +19992,12 @@
{}
]
],
"mozilla/upstream/css_variables_setProperty_recompute.html": [
[
"/_mozilla/mozilla/upstream/css_variables_setProperty_recompute.html",
{}
]
],
"mozilla/variadic-interface.html": [
[
"/_mozilla/mozilla/variadic-interface.html",
@ -31665,6 +31671,10 @@
"dfb31d3f9c4f24913055924c375f08b990b63e49",
"testharness"
],
"mozilla/upstream/css_variables_setProperty_recompute.html": [
"2e9326948f5115b3b63564fd26bae326bc8e2187",
"testharness"
],
"mozilla/variadic-interface.html": [
"9edd5150d36fabae42077a034655a8457eb75bff",
"testharness"