public static bool IsEmptyLine(IDocument document, int lineNumber)
{
return(TextUtilities.IsEmptyLine(document, document.GetLineSegment(lineNumber)));
}
public static string GetExpressionBeforeOffset(TextArea textArea, int initialOffset)
{
IDocument document = textArea.Document;
int num = initialOffset;
while (num - 1 > 0)
{
char charAt = document.GetCharAt(num - 1);
if (charAt <= ')')
{
if (charAt > '\r')
{
if (charAt == '\"')
{
if (num < initialOffset - 1)
{
return(null);
}
return("\"\"");
}
switch (charAt)
{
case '\'':
{
if (num < initialOffset - 1)
{
return(null);
}
return("'a'");
}
case ')':
{
num = TextUtilities.SearchBracketBackward(document, num - 2, '(', ')');
continue;
}
}
}
else if (charAt == '\n' || charAt == '\r')
{
break;
}
}
else if (charAt <= '>')
{
if (charAt == '.')
{
num--;
continue;
}
else if (charAt == '>')
{
if (document.GetCharAt(num - 2) != '-')
{
break;
}
num -= 2;
continue;
}
}
else if (charAt == ']')
{
num = TextUtilities.SearchBracketBackward(document, num - 2, '[', ']');
continue;
}
else if (charAt == '}')
{
break;
}
if (!char.IsWhiteSpace(document.GetCharAt(num - 1)))
{
int num1 = num - 1;
if (TextUtilities.IsLetterDigitOrUnderscore(document.GetCharAt(num1)))
{
while (num1 > 0 && TextUtilities.IsLetterDigitOrUnderscore(document.GetCharAt(num1 - 1)))
{
num1--;
}
string str = document.GetText(num1, num - num1).Trim();
string str1 = str;
string str2 = str1;
if (str1 != null && (str2 == "ref" || str2 == "out" || str2 == "in" || str2 == "return" || str2 == "throw" || str2 == "case") || str.Length > 0 && !TextUtilities.IsLetterDigitOrUnderscore(str[0]))
{
break;
}
num = num1;
}
else
{
break;
}
}
else
{
num--;
}
}
if (num < 0)
{
return(string.Empty);
}
string str3 = document.GetText(num, textArea.Caret.Offset - num).Trim();
int num2 = str3.LastIndexOf('\n');
if (num2 >= 0)
{
num = num + num2 + 1;
}
string str4 = document.GetText(num, textArea.Caret.Offset - num).Trim();
return(str4);
}
/// <summary>
/// returns the whitespaces which are before a non white space character in the line line
/// as a string.
/// </summary>
protected string GetIndentation(TextArea textArea, int lineNumber, bool smart)
{
if (lineNumber < 0 || lineNumber > textArea.Document.TotalNumberOfLines)
{
throw new ArgumentOutOfRangeException("lineNumber");
}
string lineText = TextUtilities.GetLineAsString(textArea.Document, lineNumber);
StringBuilder whitespaces = new StringBuilder();
foreach (char ch in lineText)
{
if (Char.IsWhiteSpace(ch))
{
whitespaces.Append(ch);
}
else
{
break;
}
}
if (smart)
{
bool append = false;
string word = lineText.TrimEnd(whitespaceChars).ToLowerInvariant();
if (word.EndsWith(" else") || word.EndsWith(" then"))
{
append = true;
}
else if (word.EndsWith(" begin"))
{
if (word.TrimStart().StartsWith("procedure ") && textArea.Document.FoldingManager.IsFoldStart(lineNumber))
{
goto exiting;
}
lineNumber += 2;
string newLine = CheckAndAddEndNewLine(lineNumber, textArea);
LineSegment line = textArea.Document.GetLineSegment(lineNumber);
if (textArea.Document.GetText(line).TrimStart(whitespaceChars).Length == 0)
{
if (lineText.TrimStart(whitespaceChars).ToLowerInvariant().StartsWith("if "))
{
newLine = CheckAndAddEndNewLine(++lineNumber, textArea);
lineText = TextUtilities.GetLineAsString(textArea.Document, lineNumber);
textArea.Document.Insert(line.Offset, whitespaces.ToString() + "end" + newLine);
word = lineText.TrimEnd(whitespaceChars).ToLowerInvariant();
if (word.EndsWith(" end"))
{
line = textArea.Document.GetLineSegment(lineNumber);
textArea.Document.Insert(line.Offset, whitespaces.ToString() + "else begin" + newLine);
}
}
else
{
textArea.Document.Insert(line.Offset, whitespaces.ToString() + "end" + newLine);
}
}
append = true;
}
if (append)
{
if (textArea.TextEditorProperties.ConvertTabsToSpaces)
{
whitespaces.Append(new string(whitespaceChars[0], textArea.Document.TextEditorProperties.IndentationSize));
}
else
{
whitespaces.Append(whitespaceChars[1]);
}
}
}
exiting:
return(whitespaces.ToString());
}
