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LibWeb: Implement CSSRule.parentRule and .parentStyleSheet

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Both of these are supposed to be set when the CSSRule is created. The
spec is silent on setting it when a CSSRule is added to a parent. So,
this is a bit ad-hoc.

The parent rule gets set whenever a rule is added to a new parent. The
parent stylesheet gets set whenever the rule or one of its ancestors is
added to a different stylesheet. There may be some nuance there that
I'm missing, but I'm sure we'll find out quickly once we have WPT
running!
This commit is contained in:
Sam Atkins 2022-04-22 19:56:22 +01:00 • committed by Andreas Kling
parent 6e6607a92f
commit c718ba5947
7 changed files with 65 additions and 11 deletions
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6
Userland/Libraries/LibWeb/CSS/CSSRule.idl
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@ -1,7 +1,13 @@
#import <CSS/CSSStyleSheet.idl>
[Exposed=Window]
interface CSSRule {
attribute CSSOMString cssText;
readonly attribute CSSRule? parentRule;
readonly attribute CSSStyleSheet? parentStyleSheet;
readonly attribute unsigned short type;
const unsigned short STYLE_RULE = 1;