/// <summary>
/// Gets all occurrences of a specified query.
/// </summary>
/// <param name="query"></param>
/// <param name="options"></param>
/// <returns></returns>
public static TextRange[] FindAll(this FlowDocument document, string query, RegexOptions options, out TextRangeStack stack, TextRangeStack cachedStack = null)
{
if (cachedStack == null)
{
cachedStack = new TextRangeStack(document);
}
MatchCollection matches = Regex.Matches(cachedStack.Text, query, options);
int count = matches.Count;
TextRange[] results = new TextRange[count];
for (int i = 0; i < count; i++)
{
Match match = matches[i];
results[i] = cachedStack.Select(match.Index, match.Index + match.Length);
}
stack = cachedStack;
return(results);
}
/// <summary>
/// Gets the first occurrence of a specified query starting at a specified location.
/// </summary>
/// <param name="query"></param>
/// <param name="start"></param>
/// <param name="options"></param>
/// <returns></returns>
public static TextRange Find(this FlowDocument document, string query, TextPointer start, RegexOptions options, out TextRangeStack stack, TextRangeStack cachedStack = null)
{
if (cachedStack == null)
{
cachedStack = new TextRangeStack(document);
}
int findStart = cachedStack.GetPosition(start);
int offset = findStart;
Match match = Regex.Match(cachedStack.Text.Substring(findStart), query, options);
// If we couldn't find a match, loop around to the beginning of the document.
if (!match.Success)
{
offset = 0;
int remove = findStart + query.Length;
if (remove < cachedStack.Text.Length)
{
match = Regex.Match(cachedStack.Text.Remove(remove), query, options);
}
else
{
match = Regex.Match(cachedStack.Text, query, options);
}
}
stack = cachedStack;
if (match.Success)
{
return(cachedStack.Select(match.Index + offset, match.Index + match.Length + offset));
}
return(null);
}