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LibWeb: Parse and resolve UnresolvedStyleValues
If a property is custom or contains a `var()` reference, it cannot be parsed into a proper StyleValue immediately, so we store it as an UnresolvedStyleValue until the property is compute. Then, at compute time, we resolve them by expanding out any `var()` references, and parsing the result. The implementation here is very naive, and involves copying the UnresolvedStyleValue's tree of StyleComponentValueRules while copying the contents of any `var()`s it finds along the way. This is quite an expensive operation to do every time that the style is computed.
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6 changed files with 138 additions and 6 deletions
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@ -20,7 +20,8 @@ class StyleFunctionRule : public RefCounted<StyleFunctionRule> {
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friend class Parser;
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public:
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StyleFunctionRule(String name);
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explicit StyleFunctionRule(String name);
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StyleFunctionRule(String name, Vector<StyleComponentValueRule>&& values);
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~StyleFunctionRule();
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String const& name() const { return m_name; }
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