static bool usesStyleBasedEditability(const StyleProperties& properties)
{
return properties.getPropertyCSSValue(CSSPropertyWebkitUserModify);
}
static Optional<FontTraitsMask> computeTraitsMask(const StyleProperties& style)
{
unsigned traitsMask = 0;
if (RefPtr<CSSValue> fontStyle = style.getPropertyCSSValue(CSSPropertyFontStyle)) {
if (!is<CSSPrimitiveValue>(*fontStyle))
return Nullopt;
switch (downcast<CSSPrimitiveValue>(*fontStyle).getValueID()) {
case CSSValueNormal:
traitsMask |= FontStyleNormalMask;
break;
case CSSValueItalic:
case CSSValueOblique:
traitsMask |= FontStyleItalicMask;
break;
default:
break;
}
} else
traitsMask |= FontStyleNormalMask;
if (RefPtr<CSSValue> fontWeight = style.getPropertyCSSValue(CSSPropertyFontWeight)) {
if (!is<CSSPrimitiveValue>(*fontWeight))
return Nullopt;
switch (downcast<CSSPrimitiveValue>(*fontWeight).getValueID()) {
case CSSValueBold:
case CSSValue700:
traitsMask |= FontWeight700Mask;
break;
case CSSValueNormal:
case CSSValue400:
traitsMask |= FontWeight400Mask;
break;
case CSSValue900:
traitsMask |= FontWeight900Mask;
break;
case CSSValue800:
traitsMask |= FontWeight800Mask;
break;
case CSSValue600:
traitsMask |= FontWeight600Mask;
break;
case CSSValue500:
traitsMask |= FontWeight500Mask;
break;
case CSSValue300:
traitsMask |= FontWeight300Mask;
break;
case CSSValue200:
traitsMask |= FontWeight200Mask;
break;
case CSSValue100:
traitsMask |= FontWeight100Mask;
break;
default:
break;
}
} else
traitsMask |= FontWeight400Mask;
if (RefPtr<CSSValue> fontVariant = style.getPropertyCSSValue(CSSPropertyFontVariant)) {
// font-variant descriptor can be a value list.
if (fontVariant->isPrimitiveValue()) {
RefPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
list->append(fontVariant.releaseNonNull());
fontVariant = list.releaseNonNull();
} else if (!is<CSSValueList>(*fontVariant))
return Nullopt;
CSSValueList& variantList = downcast<CSSValueList>(*fontVariant);
unsigned numVariants = variantList.length();
if (!numVariants)
return Nullopt;
for (unsigned i = 0; i < numVariants; ++i) {
switch (downcast<CSSPrimitiveValue>(variantList.itemWithoutBoundsCheck(i))->getValueID()) {
case CSSValueNormal:
traitsMask |= FontVariantNormalMask;
break;
case CSSValueSmallCaps:
traitsMask |= FontVariantSmallCapsMask;
break;
default:
break;
}
}
} else
traitsMask |= FontVariantMask;
return static_cast<FontTraitsMask>(traitsMask);
}
