static SrcSet _AttributeKeyValuesToSrcSet(Dictionary <string, string> kvs)
{
if (kvs.IsNulle())
{
return(null);
}
string src = kvs.V("src");
string srcSet = kvs.V("srcset");
if (src.IsNulle())
{
return(null);
}
var srcImg = new SrcSetImg()
{
Url = src,
Size = kvs.V("width").ToInt(0),
SizeType = SrcSizeType.Width
};
SrcSet srcset = new SrcSet()
{
Src = srcImg,
Sizes = kvs.V("sizes"),
SrcSets = SrcSet.ParseSrcSets(srcSet, out SrcSizeType sizeType),
SrcSetsSizeType = sizeType
};
srcset.InitValues();
return(srcset);
}
public static List <SrcSetImg> ParseSrcSets(string srcSetStr, out SrcSizeType sizeType)
{
sizeType = SrcSizeType.None;
if (srcSetStr.IsNulle())
{
return(null);
}
if (srcSetStr.Last() != ',')
{
srcSetStr += ','; // makes regex much easier / better, and allows consistent
}
var matches = _rxSrcSets
.Matches(srcSetStr)
.OfType <Match>()
.Where(m => m.Groups.Count > 0)
.ToArray();
List <SrcSetImg> srcs = new List <SrcSetImg>();
if (matches.Length > 0)
{
for (int i = 0; i < matches.Length; i++)
{
var m = matches[i];
var grps = m.Groups;
if ((grps?.Count ?? 0).InRange(5, 6)) // final comma can be missing
{
string url = grps[1].Value.NullIfEmptyTrimmed();
int size = grps[3].Value.ToInt(-1);
string sizeTypStr = grps[4].Value;
if (url == null || size < 1 || sizeTypStr == null || sizeTypStr.Length != 1)
{
continue;
}
char sType = sizeTypStr[0];
if (i == 0)
{
sizeType = SrcSetImg.CharForSrcSetType(sType);
if (sizeType == SrcSizeType.None)
{
return(null);
}
}
SrcSetImg sImg = new SrcSetImg()
{
Url = url,
SizeType = sizeType,
Size = size
};
if (!sImg.SetNumberVal(size, sizeType, sizeTypStr[0]))
{
continue;
}
srcs.Add(sImg);
}
}
}
if (srcs.IsNulle())
{
return(null);
}
return(srcs);
}