public string[] ExportOptions( )
{
DRegexOptions options = OptionsControl.GetSelectedOptions( );
var json = JsonSerializer.Serialize(options);
return(new[] { $"json:{json}" });
}
Regex CreateHighlightingRegex(DRegexOptions options)
{
var pb = new PatternBuilder( );
pb.Add(@"\(\?\#.*?(\)|$)"); // inline comment
pb.Add(@"(?'left_par'\()"); // '('
pb.Add(@"(?'right_par'\))"); // ')'
pb.Add(@"\\[pP]\{.*?(\} | $)"); // property
pb.Add(@"(?'left_brace'\{) (\d+(,\d*)? | ,\d+) ((?'right_brace'\})|$)"); // '{...}'
string posix_bracket = ""; // Not supported: @"(\[:.*?(:\]|$))"; // [:...:]
pb.Add($@"
(?'left_bracket'\[)
\]?
(?> {posix_bracket}{( posix_bracket.Length == 0 ? "" : " |" )} (?'left_bracket'\[)(?<c>) | (\\. | [^\[\]])+ | (?'right_bracket'\])(?<-c>))*
(?(c)(?!))
(?'right_bracket'\])?
|
(?'right_bracket'\])
" );
pb.Add(@"\\."); // '\...'
return(pb.ToRegex( ));
}
internal void SetSelectedOptions(DRegexOptions options)
{
try
{
++ChangeCounter;
Options = options.Clone( );
DataContext = Options;
}
finally
{
--ChangeCounter;
}
}
public void ImportOptions(string[] options)
{
var json = options.FirstOrDefault(o => o.StartsWith("json:"))?.Substring("json:".Length);
DRegexOptions options_obj;
if (string.IsNullOrWhiteSpace(json))
{
options_obj = new DRegexOptions( );
}
else
{
options_obj = JsonSerializer.Deserialize <DRegexOptions>(json);
}
OptionsControl.SetSelectedOptions(options_obj);
}
Regex CreateColouringRegex(DRegexOptions options)
{
var pb_escape = new PatternBuilder( );
pb_escape.BeginGroup("escape");
pb_escape.Add(@"\\c[A-Za-z]"); // Matches the control character corresponding to letter C
pb_escape.Add(@"\\x[0-9a-fA-F]{0,2}"); // Matches a character with hexadecimal value of XX.
pb_escape.Add(@"\\u[0-9a-fA-F]{0,4}"); // Matches a character with hexadecimal value of XXXX.
pb_escape.Add(@"\\U[0-9a-fA-F]{0,8}"); // Matches a character with hexadecimal value of YYYYYY.
pb_escape.Add(@"\\[pP]\{.*?(\}|$)");
pb_escape.Add(@"\\[pP].?");
pb_escape.Add(@"\\.");
pb_escape.EndGroup( );
var pb = new PatternBuilder( );
pb.BeginGroup("comment");
pb.Add(@"\(\?\#.*?(\)|$)"); // An inline comment that is ignored while matching.
pb.EndGroup( );
pb.Add(@"\(\?P(?'name'<.*?(>|$))"); // Matches named subexpression regex labeling it with name 'name'.
{
// (nested groups: https://stackoverflow.com/questions/546433/regular-expression-to-match-balanced-parentheses)
string posix_bracket = ""; // Not supported: @"(?'escape'\[:.*?(:\]|$))"; // [:...:], use escape colour
pb.Add($@"
\[
\]?
(?> {posix_bracket}{( posix_bracket.Length == 0 ? "" : " |" )} \[(?<c>) | ({pb_escape.ToPattern( )} | [^\[\]])+ | \](?<-c>))*
(?(c)(?!))
\]
" );
}
pb.Add(pb_escape.ToPattern( ));
return(pb.ToRegex( ));
}
Regex GetCachedHighlightingRegex( )
{
DRegexOptions options = OptionsControl.GetSelectedOptions( );
string key = "";
lock ( CachedHighlightingRegexes )
{
if (CachedHighlightingRegexes.TryGetValue(key, out Regex regex))
{
return(regex);
}
regex = CreateHighlightingRegex(options);
CachedHighlightingRegexes.Add(key, regex);
return(regex);
}
}
public DMatcher(string pattern, DRegexOptions options)
{
Options = options;
Pattern = pattern;
}
public IMatcher ParsePattern(string pattern)
{
DRegexOptions options = OptionsControl.GetSelectedOptions( );
return(new DMatcher(pattern, options));
}
