1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-26 05:27:46 +00:00

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.
This commit is contained in:
Sam Atkins 2021-12-03 12:32:12 +00:00 committed by Andreas Kling
parent 000fb5a70d
commit 23dc0dac88
6 changed files with 138 additions and 6 deletions

View file

@ -113,6 +113,8 @@ public:
RefPtr<StyleValue> parse_as_css_value(PropertyID);
static RefPtr<StyleValue> parse_css_value(Badge<StyleComputer>, ParsingContext const&, PropertyID, Vector<StyleComponentValueRule> const&);
private:
enum class ParsingResult {
Done,