MonoDevelop.CSharp.Completion.CSharpTextEditorCompletion.GetPreviousToken C# (CSharp) Method

		string GetPreviousToken (ref int i, bool allowLineChange)
		{
			char c;
			
			if (i <= 0)
				return null;
			
			do {
				c = textEditorData.GetCharAt (--i);
			} while (i > 0 && char.IsWhiteSpace (c) && (allowLineChange ? true : c != '\n'));
			
			if (i == 0)
				return null;
			
			if (!char.IsLetterOrDigit (c))
				return new string (c, 1);
			
			int endOffset = i + 1;
			
			do {
				c = textEditorData.GetCharAt (i - 1);
				if (!(char.IsLetterOrDigit (c) || c == '_'))
					break;
				
				i--;
			} while (i > 0);
			
			return textEditorData.GetTextBetween (i, endOffset);
		}