/// <summary>
/// Manipulates the specified text value.
/// </summary>
/// <param name="value">The value to manipulate.</param>
/// <param name="stringComparison">The type of string comparison.</param>
/// <param name="fileLineTypes">The type of the line ending in the <see cref="Scintilla"/> control.</param>
/// <returns>A string containing the manipulated text.</returns>
public static string Manipulate(string value, StringComparison stringComparison, FileLineTypes fileLineTypes)
{
try
{
var lines = new List <string>();
using var reader = new StringReader(value);
string readLine;
while ((readLine = reader.ReadLine()) != null)
{
lines.Add(readLine);
}
var linesNew = new List <string>();
foreach (var line in lines)
{
if (!linesNew.Exists(f => f.Equals(line, stringComparison)))
{
linesNew.Add(line);
}
}
string lineSeparator = Environment.NewLine;
if (fileLineTypes.HasFlag(FileLineTypes.CRLF))
{
lineSeparator = "\r\n";
}
else if (fileLineTypes.HasFlag(FileLineTypes.LF))
{
lineSeparator = "\n";
}
else if (fileLineTypes.HasFlag(FileLineTypes.CR))
{
lineSeparator = "\r";
}
return(string.Join(lineSeparator, linesNew));
}
catch (Exception ex)
{
ErrorHandlingBase.ExceptionLogAction?.Invoke(ex);
return(value);
}
}
/// <summary>
/// Gets the file line types of a given memory stream.
/// </summary>
/// <param name="stream">The memory stream to be used to check for the line endings.</param>
/// <param name="fileLineTypes">The types of line endings wanted to be included in the search.</param>
/// <returns>A collection of line ending key value pairs with their enumeration values and their names.</returns>
public static IEnumerable <KeyValuePair <FileLineTypes, string> > GetFileLineTypes(MemoryStream stream,
FileLineTypes fileLineTypes = // the default set..
FileLineTypes.CR |
FileLineTypes.CRLF |
FileLineTypes.LF |
FileLineTypes.LFCR |
FileLineTypes.UCR |
FileLineTypes.UCRLF |
FileLineTypes.ULF |
FileLineTypes.ULFCR)
{
// do note that this is the "master" method of the overloads, so the logic is going to be weird..
List <KeyValuePair <FileLineTypes, string> > result = new List <KeyValuePair <FileLineTypes, string> >();
// the contents of the given memory stream is requires as a byte array..
byte[] contentsBytes = stream.ToArray();
// indicators if a negative or positive index for the byte array
// search was given..
bool eof1, eof2, eof3;
// initialize the loop variable..
int i = 0;
// loop through the bytes in the array..
while (i < contentsBytes.Length)
{
// comparison of CR+LF without Unicode..
if (ContainsBytes(i, contentsBytes, new byte[] { 0x0D, 0x0A }, out eof1))
{
if (eof1) // check for an overflow of the byte array..
{
// the index was outside the byte array so do
// increase the loop variable by one and continue..
i++;
continue;
}
i += 2; // increase the loop variable by the amount of bytes used in the comparison..
// check that the result value doesn't already contain the given enumeration and string pair..
if (!result.Exists(f => f.Key == FileLineTypes.CRLF) && fileLineTypes.HasFlag(FileLineTypes.CRLF))
{
result.Add(
new KeyValuePair <FileLineTypes, string>(FileLineTypes.CRLF, GetLineEndingDescriptionByEnumeration(FileLineTypes.CRLF, UseEnumNames)));
}
continue; // match found so do continue the loop..
}
// comparison of LF+CR without Unicode..
if (ContainsBytes(i, contentsBytes, new byte[] { 0x0A, 0x0D }, out eof1))
{
if (eof1) // check for an overflow of the byte array..
{
// the index was outside the byte array so do
// increase the loop variable by one and continue..
i++;
continue;
}
i += 2; // increase the loop variable by the amount of bytes used in the comparison..
// check that the result value doesn't already contain the given enumeration and string pair..
if (!result.Exists(f => f.Key == FileLineTypes.LFCR) && fileLineTypes.HasFlag(FileLineTypes.LFCR))
{
result.Add(
new KeyValuePair <FileLineTypes, string>(FileLineTypes.LFCR, GetLineEndingDescriptionByEnumeration(FileLineTypes.LFCR, UseEnumNames)));
}
continue; // match found so do continue the loop..
}
// comparison of LF without Unicode..
if (ContainsBytes(i, contentsBytes, new byte[] { 0x0A }, out eof1) &&
!ContainsBytes(i + 1, contentsBytes, new byte[] { 0x0D }, out eof2) &&
!ContainsBytes(i - 1, contentsBytes, new byte[] { 0x0D }, out eof3))
{
if (eof1 || eof2 || eof3) // check for an overflow of the byte array..
{
// one or more of the indexes was outside the byte array so do
// increase the loop variable by one and continue..
i++;
continue;
}
i++; // increase the loop variable by the amount of bytes used in the comparison..
// check that the result value doesn't already contain the given enumeration and string pair..
if (!result.Exists(f => f.Key == FileLineTypes.LF) && fileLineTypes.HasFlag(FileLineTypes.LF))
{
result.Add(
new KeyValuePair <FileLineTypes, string>(FileLineTypes.LF, GetLineEndingDescriptionByEnumeration(FileLineTypes.LF, UseEnumNames)));
}
continue; // match found so do continue the loop..
}
// comparison of CR without Unicode..
if (ContainsBytes(i, contentsBytes, new byte[] { 0x0D }, out eof1) &&
!ContainsBytes(i + 1, contentsBytes, new byte[] { 0x0A }, out eof2) &&
!ContainsBytes(i - 1, contentsBytes, new byte[] { 0x0A }, out eof3))
{
if (eof1 || eof2 || eof3) // check for an overflow of the byte array..
{
// one or more of the indexes was outside the byte array so do
// increase the loop variable by one and continue..
i++;
continue;
}
i++; // increase the loop variable by the amount of bytes used in the comparison..
// check that the result value doesn't already contain the given enumeration and string pair..
if (!result.Exists(f => f.Key == FileLineTypes.CR) && fileLineTypes.HasFlag(FileLineTypes.CR))
{
result.Add(
new KeyValuePair <FileLineTypes, string>(FileLineTypes.CR, GetLineEndingDescriptionByEnumeration(FileLineTypes.CR, UseEnumNames)));
}
continue; // match found so do continue the loop..
}
// comparison of CR+LF with Unicode..
if (ContainsBytes(i, contentsBytes, new byte[] { 0x00, 0x0D, 0x00, 0x0A }, out eof1))
{
if (eof1) // check for an overflow of the byte array..
{
// the index was outside the byte array so do
// increase the loop variable by one and continue..
i++;
continue;
}
i += 4; // increase the loop variable by the amount of bytes used in the comparison..
// check that the result value doesn't already contain the given enumeration and string pair..
if (!result.Exists(f => f.Key == FileLineTypes.UCRLF) && fileLineTypes.HasFlag(FileLineTypes.UCRLF))
{
result.Add(
new KeyValuePair <FileLineTypes, string>(FileLineTypes.UCRLF, GetLineEndingDescriptionByEnumeration(FileLineTypes.UCRLF, UseEnumNames)));
}
continue; // match found so do continue the loop..
}
// comparison of LF+CR with Unicode..
if (ContainsBytes(i, contentsBytes, new byte[] { 0x00, 0x0A, 0x00, 0x0D }, out eof1))
{
if (eof1) // check for an overflow of the byte array..
{
// the index was outside the byte array so do
// increase the loop variable by one and continue..
i++;
continue;
}
i += 4; // increase the loop variable by the amount of bytes used in the comparison..
// check that the result value doesn't already contain the given enumeration and string pair..
if (!result.Exists(f => f.Key == FileLineTypes.ULFCR) && fileLineTypes.HasFlag(FileLineTypes.ULFCR))
{
result.Add(
new KeyValuePair <FileLineTypes, string>(FileLineTypes.ULFCR, GetLineEndingDescriptionByEnumeration(FileLineTypes.ULFCR, UseEnumNames)));
}
continue; // match found so do continue the loop..
}
// comparison of LF with Unicode..
if (ContainsBytes(i, contentsBytes, new byte[] { 0x00, 0x0A }, out eof1) &&
!ContainsBytes(i + 2, contentsBytes, new byte[] { 0x00, 0x0D }, out eof2) &&
!ContainsBytes(i - 2, contentsBytes, new byte[] { 0x00, 0x0D }, out eof3))
{
if (eof1 || eof2 || eof3) // check for an overflow of the byte array..
{
// one or more of the indexes was outside the byte array so do
// increase the loop variable by one and continue..
i++;
continue;
}
i += 2; // increase the loop variable by the amount of bytes used in the comparison..
// check that the result value doesn't already contain the given enumeration and string pair..
if (!result.Exists(f => f.Key == FileLineTypes.ULF) && fileLineTypes.HasFlag(FileLineTypes.ULF))
{
result.Add(
new KeyValuePair <FileLineTypes, string>(FileLineTypes.ULF, GetLineEndingDescriptionByEnumeration(FileLineTypes.ULF, UseEnumNames)));
}
continue; // match found so do continue the loop..
}
// comparison of CR with Unicode..
if (ContainsBytes(i, contentsBytes, new byte[] { 0x00, 0x0D }, out eof1) &&
!ContainsBytes(i + 2, contentsBytes, new byte[] { 0x00, 0x0A }, out eof2) &&
!ContainsBytes(i - 2, contentsBytes, new byte[] { 0x00, 0x0A }, out eof3))
{
if (eof1 || eof2 || eof3) // check for an overflow of the byte array..
{
// one or more of the indexes was outside the byte array so do
// increase the loop variable by one and continue..
i++;
continue;
}
i += 2; // increase the loop variable by the amount of bytes used in the comparison..
// check that the result value doesn't already contain the given enumeration and string pair..
if (!result.Exists(f => f.Key == FileLineTypes.UCR) && fileLineTypes.HasFlag(FileLineTypes.UCR))
{
result.Add(
new KeyValuePair <FileLineTypes, string>(FileLineTypes.UCR, GetLineEndingDescriptionByEnumeration(FileLineTypes.UCR, UseEnumNames)));
}
continue; // match found so do continue the loop..
}
// comparison of RS (see: FileLineTypes.RS description..)..
if (ContainsBytes(i, contentsBytes, new byte[] { 0x1E }, out eof1))
{
if (eof1) // check for an overflow of the byte array..
{
// the index was outside the byte array so do
// increase the loop variable by one and continue..
i++;
continue;
}
i++; // increase the loop variable by the amount of bytes used in the comparison..
// check that the result value doesn't already contain the given enumeration and string pair..
if (!result.Exists(f => f.Key == FileLineTypes.RS) && fileLineTypes.HasFlag(FileLineTypes.RS))
{
result.Add(
new KeyValuePair <FileLineTypes, string>(FileLineTypes.RS, GetLineEndingDescriptionByEnumeration(FileLineTypes.RS, UseEnumNames)));
}
continue; // match found so do continue the loop..
}
// comparison of NL (see: FileLineTypes.NL description..)..
if (ContainsBytes(i, contentsBytes, new byte[] { 0x15 }, out eof1))
{
if (eof1) // check for an overflow of the byte array..
{
// the index was outside the byte array so do
// increase the loop variable by one and continue..
i++;
continue;
}
i++; // increase the loop variable by the amount of bytes used in the comparison..
// check that the result value doesn't already contain the given enumeration and string pair..
if (!result.Exists(f => f.Key == FileLineTypes.NL) && fileLineTypes.HasFlag(FileLineTypes.NL))
{
result.Add(
new KeyValuePair <FileLineTypes, string>(FileLineTypes.NL, GetLineEndingDescriptionByEnumeration(FileLineTypes.NL, UseEnumNames)));
}
continue; // match found so do continue the loop..
}
// comparison of ATASCII (see: FileLineTypes.ATASCII description..)..
if (ContainsBytes(i, contentsBytes, new byte[] { 0x9B }, out eof1))
{
if (eof1) // check for an overflow of the byte array..
{
// the index was outside the byte array so do
// increase the loop variable by one and continue..
i++;
continue;
}
i++; // increase the loop variable by the amount of bytes used in the comparison..
// check that the result value doesn't already contain the given enumeration and string pair..
if (!result.Exists(f => f.Key == FileLineTypes.ATASCII) && fileLineTypes.HasFlag(FileLineTypes.ATASCII))
{
result.Add(
new KeyValuePair <FileLineTypes, string>(FileLineTypes.ATASCII, GetLineEndingDescriptionByEnumeration(FileLineTypes.ATASCII, UseEnumNames)));
}
continue; // match found so do continue the loop..
}
// comparison of NEWLINE (see: FileLineTypes.NEWLINE description..)..
if (ContainsBytes(i, contentsBytes, new byte[] { 0x76 }, out eof1))
{
if (eof1) // check for an overflow of the byte array..
{
// the index was outside the byte array so do
// increase the loop variable by one and continue..
i++;
continue;
}
i++; // increase the loop variable by the amount of bytes used in the comparison..
// check that the result value doesn't already contain the given enumeration and string pair..
if (!result.Exists(f => f.Key == FileLineTypes.NEWLINE) && fileLineTypes.HasFlag(FileLineTypes.NEWLINE))
{
result.Add(
new KeyValuePair <FileLineTypes, string>(FileLineTypes.NEWLINE, GetLineEndingDescriptionByEnumeration(FileLineTypes.NEWLINE, UseEnumNames)));
}
continue; // match found so do continue the loop..
}
i++; // the loop must not be infinite so increase the loop variable by one..
}
// if nothing was found assume CR+LF..
if (result.Count == 0)
{
result.Add(
new KeyValuePair <FileLineTypes, string>(FileLineTypes.CRLF, GetLineEndingDescriptionByEnumeration(FileLineTypes.CRLF, UseEnumNames)));
}
// if multiple items was found, assume mixed line endings..
if (result.Count() > 1)
{
result.Add(
new KeyValuePair <FileLineTypes, string>(FileLineTypes.Mixed, GetLineEndingDescriptionByEnumeration(FileLineTypes.Mixed, UseEnumNames)));
}
// return the result..
return(result);
}
