public void Append(string text)
{
var snippet = new FastReplacerSnippet(text);
_rootSnippet.Append(snippet);
ExtractTokens(snippet);
}
public void Replace(int start, int end, FastReplacerSnippet snippet)
{
_innerSnippets.Add(new InnerSnippet
{
Snippet = snippet,
Start = start,
End = end,
Order1 = 0,
Order2 = 0
});
}
public void InsertBefore(int start, FastReplacerSnippet snippet)
{
_innerSnippets.Add(new InnerSnippet
{
Snippet = snippet,
Start = start,
End = start,
Order1 = 2,
Order2 = _innerSnippets.Count
});
}
public void InsertAfter(int end, FastReplacerSnippet snippet)
{
_innerSnippets.Add(new InnerSnippet
{
Snippet = snippet,
Start = end,
End = end,
Order1 = 1,
Order2 = _innerSnippets.Count
});
}
public void Append(FastReplacerSnippet snippet)
{
_innerSnippets.Add(new InnerSnippet
{
Snippet = snippet,
Start = Text.Length,
End = Text.Length,
Order1 = 1,
Order2 = _innerSnippets.Count
});
}
private void ExtractTokens(FastReplacerSnippet snippet)
{
int last = 0;
while (last < snippet.Text.Length)
{
// Find next token position in snippet.Text:
int start = snippet.Text.IndexOf(_tokenOpen, last, StringComparison.InvariantCultureIgnoreCase);
if (start == -1)
{
return;
}
int end = snippet.Text.IndexOf(_tokenClose, start + _tokenOpen.Length, StringComparison.InvariantCultureIgnoreCase);
if (end == -1)
{
throw new ArgumentException($"Token is opened but not closed in text \"{snippet.Text}\".");
}
int eol = snippet.Text.IndexOf('\n', start + _tokenOpen.Length);
if (eol != -1 && eol < end)
{
last = eol + 1;
continue;
}
// Take the token from snippet.Text:
end += _tokenClose.Length;
string token = snippet.Text.Substring(start, end - start);
string context = snippet.Text;
ValidateToken(token, context, true);
// Add the token to the dictionary:
var tokenOccurrence = new TokenOccurrence {
Snippet = snippet, Start = start, End = end
};
List <TokenOccurrence> occurrences;
if (_occurrencesOfToken.TryGetValue(token, out occurrences))
{
occurrences.Add(tokenOccurrence);
}
else
{
_occurrencesOfToken.Add(token, new List <TokenOccurrence> {
tokenOccurrence
});
}
last = end;
}
}
/// <returns>Returns true if the token was found, false if nothing was replaced.</returns>
public bool InsertBefore(string token, string text)
{
ValidateToken(token, text, false);
List <TokenOccurrence> occurrences;
if (_occurrencesOfToken.TryGetValue(token, out occurrences) && occurrences.Count > 0)
{
var snippet = new FastReplacerSnippet(text);
foreach (var occurrence in occurrences)
{
occurrence.Snippet.InsertBefore(occurrence.Start, snippet);
}
ExtractTokens(snippet);
return(true);
}
return(false);
}
