/// <summary>Finds a next line break</summary>
/// <param name="sourceCode">Source code</param>
/// <param name="startPosition">Position in the input string that defines the leftmost
/// position to be searched</param>
/// <param name="lineBreakPosition">Position of line break</param>
/// <param name="lineBreakLength">Length of line break</param>
private static void FindNextLineBreak(
string sourceCode,
int startPosition,
out int lineBreakPosition,
out int lineBreakLength)
{
int length = sourceCode.Length - startPosition;
SourceCodeNavigator.FindNextLineBreak(sourceCode, startPosition, length, out lineBreakPosition, out lineBreakLength);
}
/// <summary>Calculates a line break count</summary>
/// <param name="sourceCode">Source code</param>
/// <param name="fragmentStartPosition">Start position of fragment</param>
/// <param name="fragmentLength">Length of fragment</param>
/// <param name="lineBreakCount">Number of line breaks</param>
/// <param name="charRemainderCount">Number of characters left</param>
public static void CalculateLineBreakCount(
string sourceCode,
int fragmentStartPosition,
int fragmentLength,
out int lineBreakCount,
out int charRemainderCount)
{
int length1 = sourceCode.Length;
lineBreakCount = 0;
charRemainderCount = 0;
if (string.IsNullOrWhiteSpace(sourceCode))
{
return;
}
if (fragmentStartPosition < 0)
{
throw new ArgumentException("", nameof(fragmentStartPosition));
}
if (fragmentLength > length1 - fragmentStartPosition)
{
throw new ArgumentException("", nameof(fragmentLength));
}
int num = fragmentStartPosition + fragmentLength - 1;
int lineBreakPosition = int.MinValue;
int lineBreakLength = 0;
int startPosition;
do
{
startPosition = lineBreakPosition == int.MinValue ? fragmentStartPosition : lineBreakPosition + lineBreakLength;
int length2 = num - startPosition + 1;
SourceCodeNavigator.FindNextLineBreak(sourceCode, startPosition, length2, out lineBreakPosition, out lineBreakLength);
if (lineBreakPosition != -1)
{
++lineBreakCount;
}
}while (lineBreakPosition != -1 && lineBreakPosition <= num);
if (lineBreakCount > 0)
{
charRemainderCount = num - startPosition + 1;
}
else
{
charRemainderCount = fragmentLength;
}
}
/// <summary>Gets a current line content</summary>
/// <param name="sourceCode">Source code</param>
/// <param name="currentPosition">Current position</param>
/// <param name="startLinePosition">Start position of line</param>
/// <param name="endLinePosition">End position of line</param>
/// <returns>Line content</returns>
public static string GetCurrentLine(
string sourceCode,
int currentPosition,
out int startLinePosition,
out int endLinePosition)
{
startLinePosition = -1;
endLinePosition = -1;
if (string.IsNullOrEmpty(sourceCode))
{
return(string.Empty);
}
int length1 = sourceCode.Length;
if (currentPosition >= length1)
{
throw new ArgumentException("", nameof(currentPosition));
}
switch (sourceCode[currentPosition])
{
case '\n':
case '\r':
return(string.Empty);
default:
int lineBreakPosition1;
int lineBreakLength;
SourceCodeNavigator.FindPreviousLineBreak(sourceCode, currentPosition, out lineBreakPosition1, out lineBreakLength);
startLinePosition = lineBreakPosition1 == -1 ? 0 : lineBreakPosition1 + lineBreakLength;
int lineBreakPosition2;
SourceCodeNavigator.FindNextLineBreak(sourceCode, currentPosition, out lineBreakPosition2, out int _);
endLinePosition = lineBreakPosition2 == -1 ? length1 - 1 : lineBreakPosition2 - 1;
int length2 = endLinePosition - startLinePosition + 1;
return(sourceCode.Substring(startLinePosition, length2));
}
}
/// <summary>Gets a source fragment</summary>
/// <param name="sourceCode">Source code</param>
/// <param name="nodeCoordinates">Node coordinates</param>
/// <param name="tabSize">Number of spaces in the tab</param>
/// <param name="maxFragmentLength">Maximum length of the source fragment</param>
/// <returns>Source fragment</returns>
public static string GetSourceFragment(
string sourceCode,
SourceCodeNodeCoordinates nodeCoordinates,
byte tabSize = 4,
int maxFragmentLength = 95)
{
string empty = string.Empty;
int lineNumber1 = nodeCoordinates.LineNumber;
int columnNumber = nodeCoordinates.ColumnNumber;
if (!string.IsNullOrEmpty(sourceCode))
{
int lineNumber2 = lineNumber1 - 1;
int lineNumber3 = lineNumber1;
int lineNumber4 = lineNumber1 + 1;
string line1 = string.Empty;
string line2 = string.Empty;
string line3 = string.Empty;
int num1 = 0;
int lineBreakPosition = int.MinValue;
int lineBreakLength = 0;
do
{
int num2 = lineBreakPosition == int.MinValue ? 0 : lineBreakPosition + lineBreakLength;
SourceCodeNavigator.FindNextLineBreak(sourceCode, num2, out lineBreakPosition, out lineBreakLength);
string str = lineBreakPosition == -1 ? sourceCode.Substring(num2) : sourceCode.Substring(num2, lineBreakPosition - num2);
++num1;
if (num1 == lineNumber2)
{
line1 = str;
}
else if (num1 == lineNumber3)
{
line2 = str;
}
else if (num1 == lineNumber4)
{
line3 = str;
}
}while (lineBreakPosition != -1 && num1 <= lineNumber4);
int length = lineNumber4.ToString((IFormatProvider)CultureInfo.InvariantCulture).Length;
if (lineNumber3 == num1)
{
length = lineNumber3.ToString((IFormatProvider)CultureInfo.InvariantCulture).Length;
}
int fragmentStartPosition;
int fragmentLength;
SourceCodeNavigator.CalculateCutPositions(line2, columnNumber, maxFragmentLength, out fragmentStartPosition, out fragmentLength);
StringBuilderPool shared = StringBuilderPool.Shared;
StringBuilder builder = shared.Rent();
if (line2.Length > 0)
{
if (line1.Length > 0)
{
builder.AppendLine(SourceCodeNavigator.FormatSourceCodeLine(line1, new SourceCodeNodeCoordinates(lineNumber2, 0), length, fragmentStartPosition, fragmentLength, tabSize));
}
builder.AppendLine(SourceCodeNavigator.FormatSourceCodeLine(line2, new SourceCodeNodeCoordinates(lineNumber3, columnNumber), length, fragmentStartPosition, fragmentLength, tabSize));
if (line3.Length > 0)
{
builder.AppendLine(SourceCodeNavigator.FormatSourceCodeLine(line3, new SourceCodeNodeCoordinates(lineNumber4, 0), length, fragmentStartPosition, fragmentLength, tabSize));
}
}
empty = builder.ToString();
shared.Return(builder);
}
return(empty);
}
