[Webkit-unassigned] [Bug 224614] font-size with viewport units in custom properties doesn't change when viewport resizes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=224614

--- Comment #9 from Darin Adler <darin at apple.com> ---
It’s not about isCalculatedPercentageWithLength, I don’t think, although that may be a more obscure case.

It’s simply that a calculated length currently can’t answer the "has viewport units" question. So I see 3 options:

1) Call setHasViewportUnits for all of them, potentially making resizing unnecessarily slow on all websites that use calc() but not things that are viewport-dependent.

2) Add code in calculated value parsing to compute "is viewport dependent" as we go, and store that information in CalculationValue and CSSCalcValue objects.

3) Record whether a calculated value turned out to be viewport dependent as a side effect of performing a calculation and read that boolean out after calling computeLength. Could possibly be stored in CSSToLengthConversionData.

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