static Regex CreateHighlightingRegex(GrammarEnum grammar)
{
var pb = new PatternBuilder( );
if (grammar == GrammarEnum.extended ||
grammar == GrammarEnum.ECMAScript ||
grammar == GrammarEnum.egrep ||
grammar == GrammarEnum.awk)
{
pb.Add(@"(?'left_par'\()"); // '('
pb.Add(@"(?'right_par'\))"); // ')'
pb.Add(@"(?'left_brace'\{).*?((?'right_brace'\})|$)"); // '{...}'
}
if (grammar == GrammarEnum.basic ||
grammar == GrammarEnum.grep)
{
pb.Add(@"(?'left_par'\\\()"); // '\)'
pb.Add(@"(?'right_par'\\\))"); // '\('
pb.Add(@"(?'left_brace'\\{).*?((?'right_brace'\\})|$)"); // '\{...\}'
}
pb.Add(@"((?'left_bracket'\[) ((\[:.*? (:\]|$)) | \\. | .)*? ((?'right_bracket'\])|$) )"); // [...]
pb.Add(@"\\."); // '\...'
return(pb.ToRegex( ));
}
static Regex CreateColouringRegex(GrammarEnum grammar)
{
var pb_escape = new PatternBuilder( );
pb_escape.BeginGroup("escape");
if (grammar == GrammarEnum.ECMAScript)
{
pb_escape.Add(@"\\c[A-Za-z]");
}
if (grammar == GrammarEnum.ECMAScript)
{
pb_escape.Add(@"\\x[0-9A-Fa-f]{1,2}"); // (two digits required)
}
if (grammar == GrammarEnum.awk)
{
pb_escape.Add(@"\\[0-7]{1,3}"); // octal code
}
if (grammar == GrammarEnum.ECMAScript)
{
pb_escape.Add(@"\\u[0-9A-Fa-f]{1,4}"); // (four digits required)
}
if (grammar == GrammarEnum.basic ||
grammar == GrammarEnum.grep)
{
pb_escape.Add(@"(?!\\\( | \\\) | \\\{ | \\\})\\.");
}
else
{
pb_escape.Add(@"\\.");
}
pb_escape.EndGroup( );
//
var pb_class = new PatternBuilder( ).AddGroup("class", @"\[(?'c'[:=.]) .*? (\k<c>\] | $)");
//
var pb = new PatternBuilder( );
pb.Add(pb_escape.ToPattern( ));
pb.AddGroup(null, $@"( \[ ({pb_class.ToPattern( )} | {pb_escape.ToPattern( )} | . )*? (\]|$) )");
// (group names and comments are not supported by C++ Regex)
return(pb.ToRegex( ));
}
static Regex GetCachedHighlightingRegex(GrammarEnum grammar)
{
lock ( CachedHighlightingRegexes )
{
if (CachedHighlightingRegexes.TryGetValue(grammar, out Regex regex))
{
return(regex);
}
regex = CreateHighlightingRegex(grammar);
CachedHighlightingRegexes.Add(grammar, regex);
return(regex);
}
}
public void HighlightPattern(ICancellable cnc, Highlights highlights, string pattern, int selectionStart, int selectionEnd, Segment visibleSegment)
{
GrammarEnum grammar = OptionsControl.GetGrammar( );
int par_size = 1;
int bracket_size = 1;
if (grammar == GrammarEnum.basic ||
grammar == GrammarEnum.grep)
{
par_size = 2;
}
var regex = GetCachedHighlightingRegex(grammar);
HighlightHelper.CommonHighlighting(cnc, highlights, pattern, selectionStart, selectionEnd, visibleSegment, regex, par_size, bracket_size);
}
static Regex GetCachedHighlightingRegex(GrammarEnum grammar, bool modX)
{
var key = new Key {
Grammar = grammar, ModX = modX
};
lock ( CachedHighlightingRegexes )
{
if (CachedHighlightingRegexes.TryGetValue(key, out Regex regex))
{
return(regex);
}
regex = CreateHighlightingRegex(grammar, modX);
CachedHighlightingRegexes.Add(key, regex);
return(regex);
}
}
public void HighlightPattern(ICancellable cnc, Highlights highlights, string pattern, int selectionStart, int selectionEnd, Segment visibleSegment)
{
GrammarEnum grammar = OptionsControl.GetGrammar( );
bool mod_x = OptionsControl.GetModX( );
int par_size = 1;
int bracket_size = 1;
bool is_POSIX_basic =
grammar == GrammarEnum.basic ||
grammar == GrammarEnum.sed ||
grammar == GrammarEnum.grep ||
grammar == GrammarEnum.emacs;
if (is_POSIX_basic)
{
par_size = 2;
}
Regex regex = GetCachedHighlightingRegex(grammar, mod_x);
HighlightHelper.CommonHighlighting(cnc, highlights, pattern, selectionStart, selectionEnd, visibleSegment, regex, par_size, bracket_size);
}
public void ColourisePattern(ICancellable cnc, ColouredSegments colouredSegments, string pattern, Segment visibleSegment)
{
GrammarEnum grammar = OptionsControl.GetGrammar( );
bool mod_x = OptionsControl.GetModX( );
Regex regex = GetCachedColouringRegex(grammar, mod_x);
foreach (Match m in regex.Matches(pattern))
{
Debug.Assert(m.Success);
if (cnc.IsCancellationRequested)
{
return;
}
// escapes, '\...'
{
var g = m.Groups["escape"];
if (g.Success)
{
if (cnc.IsCancellationRequested)
{
return;
}
foreach (Capture c in g.Captures)
{
if (cnc.IsCancellationRequested)
{
return;
}
var intersection = Segment.Intersection(visibleSegment, c.Index, c.Length);
if (!intersection.IsEmpty)
{
colouredSegments.Escapes.Add(intersection);
}
}
}
}
if (cnc.IsCancellationRequested)
{
return;
}
// comments, '(?#...)', '#...'
{
var g = m.Groups["comment"];
if (g.Success)
{
if (cnc.IsCancellationRequested)
{
return;
}
foreach (Capture c in g.Captures)
{
if (cnc.IsCancellationRequested)
{
return;
}
var intersection = Segment.Intersection(visibleSegment, c.Index, c.Length);
if (!intersection.IsEmpty)
{
colouredSegments.Comments.Add(intersection);
}
}
}
}
if (cnc.IsCancellationRequested)
{
return;
}
// class (within [...] groups), '[:...:]', '[=...=]', '[. ... .]'
{
var g = m.Groups["class"];
if (g.Success)
{
if (cnc.IsCancellationRequested)
{
return;
}
foreach (Capture c in g.Captures)
{
if (cnc.IsCancellationRequested)
{
return;
}
var intersection = Segment.Intersection(visibleSegment, c.Index, c.Length);
if (!intersection.IsEmpty)
{
colouredSegments.Escapes.Add(intersection);
}
}
}
}
if (cnc.IsCancellationRequested)
{
return;
}
// named group, '(?<name>...)' or '(?'name'...)'
{
var g = m.Groups["name"];
if (g.Success)
{
if (cnc.IsCancellationRequested)
{
return;
}
foreach (Capture c in g.Captures)
{
if (cnc.IsCancellationRequested)
{
return;
}
var intersection = Segment.Intersection(visibleSegment, c.Index, c.Length);
if (!intersection.IsEmpty)
{
colouredSegments.GroupNames.Add(intersection);
}
}
}
}
}
}
static Regex CreateHighlightingRegex(GrammarEnum grammar, bool modX)
{
bool is_perl =
grammar == GrammarEnum.perl ||
grammar == GrammarEnum.ECMAScript ||
grammar == GrammarEnum.normal ||
grammar == GrammarEnum.JavaScript ||
grammar == GrammarEnum.JScript;
bool is_POSIX_extended =
grammar == GrammarEnum.extended ||
grammar == GrammarEnum.egrep ||
grammar == GrammarEnum.awk;
bool is_POSIX_basic =
grammar == GrammarEnum.basic ||
grammar == GrammarEnum.sed ||
grammar == GrammarEnum.grep ||
grammar == GrammarEnum.emacs;
bool is_emacs =
grammar == GrammarEnum.emacs;
var pb = new PatternBuilder( );
if (is_perl)
{
pb.Add(@"(\(\?\#.*?(\)|$))"); // comment
}
if (is_perl && modX)
{
pb.Add(@"(\#[^\n]*)"); // line comment
}
if (is_perl || is_POSIX_extended)
{
pb.Add(@"\\Q.*?(\\E|$)"); // skip \Q...\E
pb.Add(@"\\[xNpPgk]\{.*?(\}|$)"); // (skip)
}
if (is_perl || is_POSIX_extended)
{
pb.AddGroup("left_par", @"\("); // '('
pb.AddGroup("right_par", @"\)"); // ')'
pb.Add(@"(?'left_brace'\{) \s* \d+ \s* (, \s* \d*)? \s* ((?'right_brace'\})|$)"); // '{...}' (spaces are allowed)
}
if (is_POSIX_basic)
{
pb.AddGroup("left_par", @"\\\("); // '\('
pb.AddGroup("right_par", @"\\\)"); // '\)'
pb.Add(@"(?'left_brace'\\{).*?((?'right_brace'\\})|$)"); // '\{...\}'
}
if (is_perl || is_POSIX_extended || is_POSIX_basic)
{
pb.Add(@"((?'left_bracket'\[) \]? ((\[:.*? (:\]|$)) | \\. | .)*? ((?'right_bracket'\])|$) )"); // [...]
pb.Add(@"\\."); // '\...'
}
return(pb.ToRegex( ));
}
static Regex CreateColouringRegex(GrammarEnum grammar, bool modX)
{
bool is_perl =
grammar == GrammarEnum.perl ||
grammar == GrammarEnum.ECMAScript ||
grammar == GrammarEnum.normal ||
grammar == GrammarEnum.JavaScript ||
grammar == GrammarEnum.JScript;
bool is_POSIX_extended =
grammar == GrammarEnum.extended ||
grammar == GrammarEnum.egrep ||
grammar == GrammarEnum.awk;
bool is_POSIX_basic =
grammar == GrammarEnum.basic ||
grammar == GrammarEnum.sed ||
grammar == GrammarEnum.grep ||
grammar == GrammarEnum.emacs;
bool is_emacs =
grammar == GrammarEnum.emacs;
var pb_escape = new PatternBuilder( );
pb_escape.BeginGroup("escape");
if (is_perl || is_POSIX_extended || is_POSIX_basic)
{
pb_escape.Add(@"\\[1-9]"); // back reference
}
if (is_perl || is_POSIX_extended)
{
pb_escape.Add(@"\\c[A-Za-z]"); // ASCII escape
}
if (is_perl || is_POSIX_extended)
{
pb_escape.Add(@"\\x[0-9A-Fa-f]{1,2}"); // hex, two digits
}
if (is_perl || is_POSIX_extended)
{
pb_escape.Add(@"\\x\{[0-9A-Fa-f]+(\}|$)"); // hex, four digits
}
if (is_perl || is_POSIX_extended)
{
pb_escape.Add(@"\\0[0-7]{1,3}"); // octal, three digits
}
if (is_perl || is_POSIX_extended)
{
pb_escape.Add(@"\\N\{.*?(\}|$)"); // symbolic name
}
if (is_perl || is_POSIX_extended)
{
pb_escape.Add(@"\\[pP]\{.*?(\}|$)"); // property
}
if (is_perl || is_POSIX_extended)
{
pb_escape.Add(@"\\[pP]."); // property, short name
}
if (is_perl || is_POSIX_extended)
{
pb_escape.Add(@"\\Q.*?(\\E|$)");
}
; // quoted sequence
if (is_emacs)
{
pb_escape.Add(@"\\[sS]."); // syntax group
}
if (is_perl || is_POSIX_extended)
{
pb_escape.Add(@"\\."); // various
}
if (is_POSIX_basic)
{
pb_escape.Add(@"(?!\\\( | \\\) | \\\{ | \\\})\\."); // various
}
pb_escape.EndGroup( );
var pb_class = new PatternBuilder( );
pb_class.BeginGroup("class");
if (is_perl || is_POSIX_extended || is_POSIX_basic)
{
pb_class.Add(@"\[(?'c'[:=.]) .*? (\k<c>\] | $)");
}
pb_class.EndGroup( );
var pb = new PatternBuilder( );
pb.BeginGroup("comment");
if (is_perl)
{
pb.Add(@"\(\?\#.*?(\)|$)"); // comment
}
if (is_perl && modX)
{
pb.Add(@"\#.*?(\n|$)"); // line-comment*/
}
pb.EndGroup( );
if (is_perl)
{
pb.Add(@"\(\?(?'name'<(?![=!]).*?(>|$)) | \(\?(?'name''.*?('|$))");
}
if (is_perl)
{
pb.Add(@"(?'name'\\g-?[1-9]) | (?'name'\\g\{.*?(\}|$))"); // back reference
}
if (is_perl)
{
pb.Add(@"(?'name'\\[gk]<.*?(>|$)) | (?'name'\\[gk]'.*?('|$))"); // back reference
}
if (is_perl || is_POSIX_extended || is_POSIX_basic)
{
pb.AddGroup(null, $@"\[ \]? ({pb_class.ToPattern( )} | {pb_escape.ToPattern( )} | . )*? (\]|$)");
}
pb.Add(pb_escape.ToPattern( ));
return(pb.ToRegex( ));
}
public void ColourisePattern(ICancellable cnc, ColouredSegments colouredSegments, string pattern, Segment visibleSegment)
{
GrammarEnum grammar = OptionsControl.GetGrammar( );
Regex regex = GetCachedColouringRegex(grammar);
foreach (Match m in regex.Matches(pattern))
{
Debug.Assert(m.Success);
if (cnc.IsCancellationRequested)
{
return;
}
// escapes, '\...'
{
var g = m.Groups["escape"];
if (g.Success)
{
if (cnc.IsCancellationRequested)
{
return;
}
foreach (Capture c in g.Captures)
{
if (cnc.IsCancellationRequested)
{
return;
}
var intersection = Segment.Intersection(visibleSegment, c.Index, c.Length);
if (!intersection.IsEmpty)
{
colouredSegments.Escapes.Add(intersection);
}
}
}
}
if (cnc.IsCancellationRequested)
{
return;
}
// classes within character groups, [ ... [:...:] ... ]
{
var g = m.Groups["class"];
if (g.Success)
{
if (cnc.IsCancellationRequested)
{
return;
}
foreach (Capture c in g.Captures)
{
if (cnc.IsCancellationRequested)
{
return;
}
var intersection = Segment.Intersection(visibleSegment, c.Index, c.Length);
if (!intersection.IsEmpty)
{
colouredSegments.Escapes.Add(intersection);
}
}
}
}
}
}
