private static string RemoveAllTagsIf(string inputHtml, string tagName, HtmlTagFilter @if, bool preserveContents)
{
return(RemoveFromHtmlIf(inputHtml,
"<\\s*{0}\\b[^>]*>".F(Regex.Escape(tagName)),
"</\\s*{0}\\b[^>]*>".F(Regex.Escape(tagName)),
@if,
preserveContents));
}
private static string RemoveFromHtmlIf(string inputHtml, string startReExpr, string endReExpr, HtmlTagFilter @if, bool preserveContents)
{
Regex startRe = ScriptableEmailFunctions.GetRegex(startReExpr, RegexOptions.IgnoreCase | RegexOptions.ExplicitCapture);
Regex endRe = ScriptableEmailFunctions.GetRegex(endReExpr, RegexOptions.IgnoreCase | RegexOptions.ExplicitCapture);
StringBuilder sb = new StringBuilder(inputHtml.Length);
int inputIndex = 0;
var startMc = startRe.Matches(inputHtml);
foreach (Match startMatch in startMc)
{
if (@if(startMatch.Value))
{
// Include everything up to startMatch
sb.Append(inputHtml.Substring(inputIndex, startMatch.Index - inputIndex));
inputIndex = startMatch.Index + startMatch.Length;
var endMatch = endRe.Match(inputHtml, startMatch.Index + startMatch.Length);
if (endMatch.Success)
{
if (preserveContents)
{
// Include everything up to endMatch
sb.Append(inputHtml.Substring(inputIndex, endMatch.Index - inputIndex));
inputIndex = endMatch.Index + endMatch.Length;
}
else
{
// Do not include anything, just update inputIndex
inputIndex = endMatch.Index + endMatch.Length;
}
}
}
else
{
// Include the match
sb.Append(inputHtml.Substring(inputIndex, startMatch.Index + startMatch.Length - inputIndex));
inputIndex = startMatch.Index + startMatch.Length;
}
}
// Include the remaining of the inputHtml
sb.Append(inputHtml.Substring(inputIndex));
return(sb.ToString());
}
