/// <summary>
/// Retrieves link for "normal" style icon, from given style map
/// </summary>
/// <param name="kml">kml file where the style map is in</param>
/// <param name="styleMap">style map to search</param>
/// <returns>style URL, or null when style couldn't be retrieved</returns>
private static string GetStyleMapNormalStyleIconLink(KmlFile kml, StyleMapCollection styleMap)
{
var normalStyle = styleMap.First(x => x.State.HasValue && x.State.Value == StyleState.Normal);
if (normalStyle != null)
{
string normalStyleUrl = normalStyle.StyleUrl.ToString();
if (normalStyleUrl.StartsWith("#"))
{
var iconStyle = kml.FindStyle(normalStyleUrl.Substring(1));
if (iconStyle != null &&
iconStyle is Style icon)
{
return(icon.Icon.Icon.Href.ToString());
}
}
}
return(null);
}
/// <summary>
/// Gets style icon from StyleUrl property of placemark
/// </summary>
/// <param name="kml">kml file where the placemark is in</param>
/// <param name="placemark">placemark to check</param>
/// <returns>style URL, or empty string when style couldn't be retrieved</returns>
private static string GetStyleIconFromStyleUrl(KmlFile kml, Placemark placemark)
{
string styleUrl = placemark.StyleUrl.ToString();
if (styleUrl.StartsWith("#"))
{
var style = kml.FindStyle(styleUrl.Substring(1));
if (style != null &&
style is StyleMapCollection styleMap)
{
string link = GetStyleMapNormalStyleIconLink(kml, styleMap);
if (!string.IsNullOrEmpty(link))
{
return(link);
}
}
}
return(string.Empty);
}