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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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9
Userland/Libraries/LibWeb/CSS/CSSRule.h
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@ -39,11 +39,20 @@ public:
String css_text() const;
void set_css_text(StringView);
CSSRule* parent_rule() { return m_parent_rule; }
void set_parent_rule(CSSRule*);
CSSStyleSheet* parent_style_sheet() { return m_parent_style_sheet; }
virtual void set_parent_style_sheet(CSSStyleSheet*);
template<typename T>
bool fast_is() const = delete;
protected:
virtual String serialized() const = 0;
WeakPtr<CSSRule> m_parent_rule;
WeakPtr<CSSStyleSheet> m_parent_style_sheet;
};
}