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Reifying the result gets quite ad-hoc. Firstly because "parse a component value" produces a ComponentValue, not a full StyleValue like we need for math functions. And second, because not all math functions can be reified as a CSSNumericValue: Besides the fact that I haven't implemented CalculatedStyleValue reification at all yet, there are a lot of math functions with no corresponding CSSMathValue in the spec yet. If the calculation tree contains any of those, the best we can do is reify as a CSSStyleValue, and that isn't a valid return value from CSSNumericValue.parse(). So, I made us throw a SyntaxError in those cases. This seems to match Chrome's behaviour. Spec issue: https://github.com/w3c/css-houdini-drafts/issues/1090
47 lines
1.5 KiB
Text
47 lines
1.5 KiB
Text
#import <CSS/CSSStyleValue.idl>
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// https://drafts.css-houdini.org/css-typed-om-1/#enumdef-cssnumericbasetype
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enum CSSNumericBaseType {
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"length",
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"angle",
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"time",
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"frequency",
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"resolution",
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"flex",
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"percent",
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};
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// https://drafts.css-houdini.org/css-typed-om-1/#dictdef-cssnumerictype
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// AD-HOC: We give these default values and mark percentHint as nullable. https://github.com/w3c/css-houdini-drafts/issues/1149
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dictionary CSSNumericType {
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long length = 0;
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long angle = 0;
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long time = 0;
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long frequency = 0;
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long resolution = 0;
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long flex = 0;
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long percent = 0;
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CSSNumericBaseType? percentHint;
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};
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// https://drafts.css-houdini.org/css-typed-om-1/#cssnumericvalue
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[Exposed=(Window, Worker, PaintWorklet, LayoutWorklet)]
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interface CSSNumericValue : CSSStyleValue {
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[FIXME] CSSNumericValue add(CSSNumberish... values);
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[FIXME] CSSNumericValue sub(CSSNumberish... values);
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[FIXME] CSSNumericValue mul(CSSNumberish... values);
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[FIXME] CSSNumericValue div(CSSNumberish... values);
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[FIXME] CSSNumericValue min(CSSNumberish... values);
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[FIXME] CSSNumericValue max(CSSNumberish... values);
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[FIXME] boolean equals(CSSNumberish... value);
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// FIXME: CSSUnitValue to(USVString unit);
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// FIXME: CSSMathSum toSum(USVString... units);
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[ImplementedAs=type_for_bindings] CSSNumericType type();
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[Exposed=Window] static CSSNumericValue parse(USVString cssText);
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};
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// https://drafts.css-houdini.org/css-typed-om-1/#typedefdef-cssnumberish
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typedef (double or CSSNumericValue) CSSNumberish;
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