public string[] ExportOptions( )
{
IcuRegexOptions options = OptionsControl.GetSelectedOptions( );
var json = JsonSerializer.Serialize(options);
return(new[] { $"json:{json}" });
}
Regex CreateHighlightingRegex(IcuRegexOptions options)
{
var pb = new PatternBuilder( );
pb.Add(@"\(\?\#.*?(\)|$)"); // comment
if (options.UREGEX_COMMENTS)
{
pb.Add(@"\#.*?(\n|$)"); // line-comment
}
pb.Add(@"\\Q.*?(\\E|$)"); // quoted part
pb.Add(@"(?'left_par'\()"); // '('
pb.Add(@"(?'right_par'\))"); // ')'
pb.Add(@"\\[NpPx]\{.*?(\}|$)"); // (skip)
pb.Add(@"(?'left_brace'\{).*?((?'right_brace'\})|$)"); // '{...}'
string posix_bracket = @"(\[:.*?(:\]|$))"; // [:...:]
pb.Add($@"
(?'left_bracket'\[)
\]?
(?> {posix_bracket} | (?'left_bracket'\[)(?<c>) | (\\. | [^\[\]])+ | (?'right_bracket'\])(?<-c>))*
(?(c)(?!))
(?'right_bracket'\])?
|
(?'right_bracket'\])
" );
pb.Add(@"\\."); // '\...'
return(pb.ToRegex( ));
}
Regex GetCachedHighlightingRegex( )
{
IcuRegexOptions options = OptionsControl.GetSelectedOptions( );
if (options.UREGEX_LITERAL)
{
return(PatternBuilder.AlwaysFailsRegex);
}
object key = options.UREGEX_COMMENTS;
lock ( CachedHighlightingRegexes )
{
if (CachedHighlightingRegexes.TryGetValue(key, out Regex regex))
{
return(regex);
}
regex = CreateHighlightingRegex(options);
CachedHighlightingRegexes.Add(key, regex);
return(regex);
}
}
public IcuMatcher(string pattern, IcuRegexOptions options)
{
Options = options;
if (!string.IsNullOrWhiteSpace(options.Limit) && !int.TryParse(options.Limit, out var limit))
{
throw new ApplicationException("Invalid limit. Please enter an integer number.");
}
Pattern = pattern;
}
internal void SetSelectedOptions(IcuRegexOptions 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);
IcuRegexOptions options_obj;
if (string.IsNullOrWhiteSpace(json))
{
options_obj = new IcuRegexOptions( );
}
else
{
options_obj = JsonSerializer.Deserialize <IcuRegexOptions>(json);
}
OptionsControl.SetSelectedOptions(options_obj);
}
Regex CreateColouringRegex(IcuRegexOptions options)
{
var pb_escape = new PatternBuilder( );
pb_escape.BeginGroup("escape");
pb_escape.Add(@"\\c[A-Za-z]"); // \cx control char
pb_escape.Add(@"\\[NpP]\{.*?(\} | $)"); // named character, property
pb_escape.Add(@"\\[uUx][0-9a-fA-F]+"); // hexadecimal char
pb_escape.Add(@"\\x\{[0-9a-fA-F]+(\}|$)"); // hexadecimal char
pb_escape.Add(@"\\0[0-7]+"); // octal
pb_escape.Add(@"\\Q.*?(\\E|$)"); // quoted part
pb_escape.Add(@"\\."); // \.
pb_escape.EndGroup( );
var pb = new PatternBuilder( );
pb.BeginGroup("comment");
pb.Add(@"\(\?\#.*?(\)|$)"); // comment
if (options.UREGEX_COMMENTS)
{
pb.Add(@"\#.*?(\n|$)"); // line-comment
}
pb.EndGroup( );
pb.Add(@"\(\?(?'name'<(?![=!]).*?(>|$))");
pb.Add(@"(?'name'\\k<.*?(>|$))");
string posix_bracket = @"(?'escape'\[:.*?(:\]|$))"; // [:...:], use escape colour
pb.Add($@"
\[
\]?
(?> {posix_bracket} | \[(?<c>) | ({pb_escape.ToPattern( )} | [^\[\]])+ | \](?<-c>))*
(?(c)(?!))
\]
" );
pb.Add(pb_escape.ToPattern( ));
return(pb.ToRegex( ));
}
public IMatcher ParsePattern(string pattern)
{
IcuRegexOptions options = OptionsControl.GetSelectedOptions( );
return(new IcuMatcher(pattern, options));
}