public IContent Splice(int offset)
{
var right = new ContentString(_content.GetRange(offset, _content.Count - offset));
_content.RemoveRange(offset, _content.Count - offset);
// Prevent encoding invalid documents because of splitting of surrogate pairs.
var firstCharCode = (char)_content[offset - 1];
if (firstCharCode >= 0xD800 && firstCharCode <= 0xDBFF)
{
// Last character of the left split is the start of a surrogate utf16/ucs2 pair.
// We don't support splitting of surrogate pairs because this may lead to invalid documents.
// Replace the invalid character with a unicode replacement character U+FFFD.
_content[offset - 1] = '\uFFFD';
// Replace right as well.
right._content[0] = '\uFFFD';
}
return(right);
}
public static IContent ReadItemContent(IUpdateDecoder decoder, byte info)
{
switch (info & Bits.Bits5)
{
case 0: // GC
throw new Exception("GC is not ItemContent");
case 1: // Deleted
return(ContentDeleted.Read(decoder));
case 2: // JSON
return(ContentJson.Read(decoder));
case 3: // Binary
return(ContentBinary.Read(decoder));
case 4: // String
return(ContentString.Read(decoder));
case 5: // Embed
return(ContentEmbed.Read(decoder));
case 6: // Format
return(ContentFormat.Read(decoder));
case 7: // Type
return(ContentType.Read(decoder));
case 8: // Any
return(ContentAny.Read(decoder));
case 9: // Doc
return(ContentDoc.Read(decoder));
default:
throw new InvalidOperationException($"Content type not recognized: {info}");
}
}