// parsing
#region public static PDFStyleMatcher Parse(string selector)
public static PDFStyleMatcher Parse(string selector)
{
if (string.IsNullOrEmpty(selector))
{
return(null);
}
selector = selector.Trim();
if (string.IsNullOrEmpty(selector))
{
return(null);
}
if (string.Equals("*", selector))
{
return(new PDFStyleCatchAllMatcher());
}
var each = selector.Split(", ", StringSplitOptions.RemoveEmptyEntries);
if (each.Length > 1)
{
PDFStyleMatcher root = null;
foreach (var one in each)
{
var all = one.Split(" ", StringSplitOptions.RemoveEmptyEntries);
StylePlacement placement = StylePlacement.Any;
var parsed = ParseSelectorList(all, all.Length - 1, placement);
if (null == root)
{
root = new PDFStyleMatcher(parsed);
}
else
{
root = new PDFStyleMultipleMatcher(parsed, root);
}
}
return(root);
}
else
{
var all = String.IsNullOrEmpty(selector) ? new string[] { } : selector.Split(" ", StringSplitOptions.RemoveEmptyEntries);
StylePlacement placement = StylePlacement.Any;
var one = ParseSelectorList(all, all.Length - 1, placement);
return(new PDFStyleMatcher(one));
}
}
public static PDFStyleSelector ParseSelectorList(string[] selector, int index, StylePlacement placement)
{
if (selector[index] == ">")
{
placement = StylePlacement.DirectParent;
index--;
}
var one = ParseSingleSelector(selector[index]);
one.Placement = placement;
if (index > 0)
{
one.Ancestor = ParseSelectorList(selector, index - 1, StylePlacement.Any);
}
return(one);
}
