Regex GetCachedHighlightingRegex(OnigurumaRegexInterop.OnigurumaHelper helper)
{
string key = helper.GetKey( );
lock ( CachedHighlightingRegexes )
{
if (CachedHighlightingRegexes.TryGetValue(key, out Regex regex))
{
return(regex);
}
regex = CreateHighlightingRegex(helper);
CachedHighlightingRegexes.Add(key, regex);
return(regex);
}
}
Regex CreateHighlightingRegex(OnigurumaRegexInterop.OnigurumaHelper helper)
{
if (helper.IsONIG_SYNTAX_ASIS)
{
return(PatternBuilder.AlwaysFailsRegex);
}
var pb = new PatternBuilder( );
if (helper.IsONIG_SYN_OP2_QMARK_GROUP_EFFECT)
{
pb.Add(@"\(\?\#.*?(\)|$)"); // comment
}
if (helper.IsONIG_OPTION_EXTEND)
{
pb.Add(@"\#.*?(\n|$)"); // line-comment
}
if (helper.IsONIG_SYN_OP2_ESC_CAPITAL_Q_QUOTE)
{
pb.Add(@"\\Q.*?(\\E|$)"); // quoted part
}
if (helper.IsONIG_SYN_OP_LPAREN_SUBEXP)
{
pb.Add(@"(?'left_par'\()"); // '('
pb.Add(@"(?'right_par'\))"); // ')'
}
if (helper.IsONIG_SYN_OP_ESC_LPAREN_SUBEXP)
{
pb.Add(@"(?'left_par'\\\()"); // '\('
pb.Add(@"(?'right_par'\\\))"); // '\)'
}
if (helper.IsONIG_SYN_OP_ESC_O_BRACE_OCTAL)
{
pb.Add(@"\\o\{.*?(\}|$)"); // \o{17777777777 ...} wide octal chars
}
if (helper.IsONIG_SYN_OP_ESC_X_BRACE_HEX8)
{
pb.Add(@"\\x\{.*?(\}|$)"); // \x{7HHHHHHH ...} wide hexadecimal chars
}
if (helper.IsONIG_SYN_OP2_ESC_P_BRACE_CHAR_PROPERTY || helper.IsONIG_SYN_OP2_ESC_P_BRACE_CIRCUMFLEX_NOT)
{
pb.Add(@"\\[pP]\{.*?(\} | $)"); // property
}
if (helper.IsONIG_SYN_OP_BRACE_INTERVAL)
{
pb.Add(@"(?'left_brace'\{) (\d+(,\d*)? | ,\d+) ((?'right_brace'\})|$)"); // '{...}'
}
if (helper.IsONIG_SYN_OP_ESC_BRACE_INTERVAL)
{
pb.Add(@"(?'left_brace'\\{).*?((?'right_brace'\\})|$)"); // '\{...\}'
}
string posix_bracket = "";
if (helper.IsONIG_SYN_OP_POSIX_BRACKET)
{
posix_bracket = @"(\[:.*?(:\]|$))"; // [:...:]
}
if (helper.IsONIG_SYN_OP_BRACKET_CC)
{
pb.Add($@"
(?'left_bracket'\[)
\]?
(?> {posix_bracket}{( posix_bracket.Length == 0 ? "" : " |" )} (?'left_bracket'\[)(?<c>) | (\\. | [^\[\]])+ | (?'right_bracket'\])(?<-c>))*
(?(c)(?!))
(?'right_bracket'\])?
|
(?'right_bracket'\])
" );
}
pb.Add(@"\\."); // '\...'
return(pb.ToRegex( ));
}
Regex CreateColouringRegex(OnigurumaRegexInterop.OnigurumaHelper helper)
{
if (helper.IsONIG_SYNTAX_ASIS)
{
return(PatternBuilder.AlwaysFailsRegex);
}
var pb_escape = new PatternBuilder( );
pb_escape.BeginGroup("escape");
pb_escape.Add(@"\\0[0-7]{1,2}"); // octal, two digits after 0
pb_escape.Add(@"\\[0-7]{1,3}"); // octal, three digits
if (helper.IsONIG_SYN_OP_ESC_O_BRACE_OCTAL)
{
pb_escape.Add(@"\\o\{[0-7]+ (\s+ [0-7]+)* (\}|$)"); // \o{17777777777 ...} wide octal chars
}
pb_escape.Add(@"\\u[0-9a-fA-F]+"); // \uHHHH wide hexadecimal char
if (helper.IsONIG_SYN_OP_ESC_X_HEX2)
{
pb_escape.Add(@"\\x[0-9a-fA-F]+"); // \xHH hexadecimal char
}
if (helper.IsONIG_SYN_OP_ESC_X_BRACE_HEX8)
{
pb_escape.Add(@"\\x\{[0-9a-fA-F]+ (\s+ [0-9a-fA-F]+)* (\}|$)"); // \x{7HHHHHHH ...} wide hexadecimal chars
}
if (helper.IsONIG_SYN_OP_ESC_C_CONTROL)
{
pb_escape.Add(@"\\c[A-Za-z]"); // \cx control char
pb_escape.Add(@"\\C-([A-Za-z])?"); // \C-x control char
}
pb_escape.Add(@"\\M-([A-Za-z])?"); // \M-x meta (x|0x80)
pb_escape.Add(@"\\M-(\\C-([A-Za-z])?)?"); // \M-x meta control char
pb_escape.Add(@"\\[pP]\{.*?(\} | $)"); // property
/*
* Probably not useful
*
* if( helper.IsONIG_SYN_OP_ESC_ASTERISK_ZERO_INF )
* {
* pb_escape.Add( @"(?!\\\*)");
* }
*
* if( helper.IsONIG_SYN_OP_ESC_PLUS_ONE_INF )
* {
* pb_escape.Add( @"(?!\\\+)");
* }
*
* if( helper.IsONIG_SYN_OP_ESC_QMARK_ZERO_ONE )
* {
* pb_escape.Add( @"(?!\\\?)");
* }
*
* if( helper.IsONIG_SYN_OP_ESC_BRACE_INTERVAL )
* {
* pb_escape.Add( @"(?!\\[{}])");
* }
*/
pb_escape.Add(@"\\.");
if (helper.IsONIG_SYN_OP2_ESC_CAPITAL_Q_QUOTE)
{
pb_escape.Add(@"\\Q.*?(\\E|$)"); // quoted part; use 'escape' name to take its colour
}
pb_escape.EndGroup( );
var pb = new PatternBuilder( );
pb.BeginGroup("comment");
if (helper.IsONIG_SYN_OP2_QMARK_GROUP_EFFECT)
{
pb.Add(@"\(\?\#.*?(\)|$)"); // comment
}
if (helper.IsONIG_OPTION_EXTEND)
{
pb.Add(@"\#.*?(\n|$)"); // line-comment
}
pb.EndGroup( );
if (helper.IsONIG_SYN_OP2_QMARK_LT_NAMED_GROUP)
{
pb.Add(@"\(\?(?'name'<(?![=!]).*?(>|$))");
pb.Add(@"\(\?(?'name''.*?('|$))");
}
if (helper.IsONIG_SYN_OP2_ATMARK_CAPTURE_HISTORY)
{
pb.Add(@"\(\?@(?'name'<.*?(>|$))");
pb.Add(@"\(\?@(?'name''.*?('|$))");
}
if (helper.IsONIG_SYN_OP2_ESC_K_NAMED_BACKREF)
{
pb.Add(@"(?'name'\\k<.*?(>|$))");
pb.Add(@"(?'name'\\k'.*?('|$))");;
}
if (helper.IsONIG_SYN_OP2_ESC_G_SUBEXP_CALL)
{
pb.Add(@"(?'name'\\g<.*?(>|$))");
pb.Add(@"(?'name'\\g'.*?('|$))");
}
// (nested groups: https://stackoverflow.com/questions/546433/regular-expression-to-match-balanced-parentheses)
string posix_bracket = "";
if (helper.IsONIG_SYN_OP_POSIX_BRACKET)
{
posix_bracket = @"(?'escape'\[:.*?(:\]|$))"; // [:...:], use escape colour
}
pb.Add($@"
\[
\]?
(?> {posix_bracket}{( posix_bracket.Length == 0 ? "" : " |" )} \[(?<c>) | ({pb_escape.ToPattern( )} | [^\[\]])+ | \](?<-c>))*
(?(c)(?!))
\]
" );
if (helper.IsONIG_SYN_OP_ESC_LPAREN_SUBEXP)
{
pb.Add(@"\\\( | \\\)"); // (skip)
}
if (helper.IsONIG_SYN_OP_ESC_BRACE_INTERVAL)
{
pb.Add(@"\\\{ | \\\}"); // (skip)
}
pb.Add(pb_escape.ToPattern( ));
return(pb.ToRegex( ));
}
