internal CSSFontProperty()
: base(PropertyNames.Font)
{
_style = new CSSFontStyleProperty();
_variant = new CSSFontVariantProperty();
_weight = new CSSFontWeightProperty();
_stretch = new CSSFontStretchProperty();
_size = new CSSFontSizeProperty();
_family = new CSSFontFamilyProperty();
_height = new CSSLineHeightProperty();
_inherited = true;
}
protected override Boolean IsValid(CSSValue value)
{
SystemSetting setting;
if (value is CSSIdentifierValue && _parts.TryGetValue(((CSSIdentifierValue)value).Value, out setting))
{
SetTo(setting);
}
else if (value is CSSValueList)
{
var list = (CSSValueList)value;
var index = 0;
var startGroup = new List <CSSProperty>(4);
var style = new CSSFontStyleProperty();
var variant = new CSSFontVariantProperty();
var weight = new CSSFontWeightProperty();
var stretch = new CSSFontStretchProperty();
var size = new CSSFontSizeProperty();
var height = new CSSLineHeightProperty();
var family = new CSSFontFamilyProperty();
startGroup.Add(style);
startGroup.Add(variant);
startGroup.Add(weight);
startGroup.Add(stretch);
while (true)
{
var length = startGroup.Count;
for (int i = 0; i < length; i++)
{
if (CheckSingleProperty(startGroup[i], index, list))
{
startGroup.RemoveAt(i);
index++;
break;
}
}
if (length == startGroup.Count)
{
break;
}
}
startGroup.Clear();
if (!CheckSingleProperty(size, index, list) || ++index == list.Length)
{
return(false);
}
if (list[index] == CSSValue.Delimiter && (!CheckSingleProperty(height, ++index, list) || ++index == list.Length))
{
return(false);
}
if (!CheckLastProperty(family, index, list))
{
return(false);
}
_style = style;
_variant = variant;
_weight = weight;
_stretch = stretch;
_size = size;
_height = height;
_family = family;
}
else if (value != CSSValue.Inherit)
{
return(false);
}
return(true);
}