private static string Explode(this string source, Regex pattern, PatternStyle patternStyle, Func <string, string> expansionFactory, TreeNode <string> parent)
{
var output = source;
while (output.HasChildren(pattern))
{
foreach (Match match in pattern.Matches(source))
{
var child = match.Value;
var token = patternStyle.TokenReplaceFilter(match.Value);
var thisNode = parent.Children.Add(token);
// if we have already encountered this token in this call tree, we have a circular reference
if (thisNode.CallTree.Contains(token))
{
throw new CircularReferenceException(string.Format("Circular Reference Detected for token '{0}'. Call Tree: {1}->{2}",
token,
String.Join("->", thisNode.CallTree.ToArray().Reverse()), token));
}
// expand this match
var expandedValue = expansionFactory(token);
// Replace the match with the expanded value
child = Regex.Replace(child, patternStyle.OutputFilter(match.Value), expandedValue);
// Recursively expand the child until we no longer encounter nested tokens (or hit a circular reference)
child = child.Explode(pattern, patternStyle, expansionFactory, thisNode);
// finally, replace the match in the output with the fully-expanded value
output = Regex.Replace(output, patternStyle.OutputFilter(match.Value), child);
}
}
return(output);
}
public static string GetPatternImage(PatternStyle pattern, Color foreColor, Color backgroundColor)
{
string result = "";
using (MemoryStream ms = new MemoryStream())
using (Bitmap bitmap = new Bitmap(8, 8))
using (Graphics gr = Graphics.FromImage(bitmap))
{
gr.Clear(backgroundColor);
var patternCoords = m_coords[(int)pattern];
for (int i = 0; i < patternCoords.Length; i += 2)
{
bitmap.SetPixel(patternCoords[i], patternCoords[i + 1], foreColor);
}
bitmap.Save(ms, ImageFormat.Png);
ms.Position = 0;
result = "data:image/png;base64," + Convert.ToBase64String(ms.ToArray());
}
return(result);
}
public void Reset()
{
Style = PatternStyle.NoPattern;
ForegroundColor = ExcelColor.WindowTextForPattern;
BackgroundColor = ExcelColor.WindowBackgroundForPattern;
}