public string PerformReplacements(string text, ReplacementInfo replacementInfo)
{
if (replacementInfo == null)
{
return(text);
}
//AM: replacements may be implemented more effectively
buffer.Capacity = Math.Max(buffer.Capacity, text.Length + replacementInfo.DeltaLength);
buffer.Append(text);
IList <ReplacementItem> replacementItems = replacementInfo.Items;
int count = replacementItems.Count;
for (int i = 0; i < count; i++)
{
ReplacementItem item = replacementItems[i];
buffer.Remove(item.CharIndex, 1);
string replaceString = item.ReplaceWith;
if (!String.IsNullOrEmpty(replaceString))
{
buffer.Insert(item.CharIndex, replaceString);
}
}
string result = buffer.ToString();
buffer.Length = 0;
return(result);
}
public ReplacementInfo CreateReplacementInfo(string text, Dictionary <char, string> replaceTable)
{
ReplacementInfo result = null;
for (int i = text.Length - 1; i >= 0; i--)
{
string replaceWith;
if (replaceTable.TryGetValue(text[i], out replaceWith))
{
if (result == null)
{
result = new ReplacementInfo();
}
result.Add(i, replaceWith);
}
}
return(result);
}
