Added regex_escape script function (was already used by keyword code);

Added icons for 'sort special rarity' choice.

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@625 0fc631ac-6414-0410-93d0-97cfa31319b6

src/util/string.cpp

@@ -384,4 +384,53 @@ String clean_filename(const String& name) {
 		clean = _("no-name") + clean;
 	}
 	return clean;
-}
+}
+
+// ----------------------------------------------------------------------------- : Regular expressions
+
+/// Escape a single character for use in regular expressions
+String regex_escape(Char c) {
+	if (c == _('(') || c == _(')') || c == _('[') || c == _(']') || c == _('{') ||
+	    c == _('.') || c == _('^') || c == _('$') || c == _('#') || c == _('\\') ||
+	    c == _('|') || c == _('+') || c == _('*') || c == _('?')) {
+		// c needs to be escaped
+		return _("\\") + String(1,c);
+	} else {
+		return String(1,c);
+	}
+}
+/// Escape a string for use in regular expressions
+String regex_escape(const String& s) {
+	String ret;
+	FOR_EACH_CONST(c,s) ret += regex_escape(c);
+	return ret;
+}
+
+String make_non_capturing(const String& re) {
+	String ret;
+	bool escape = false, bracket = false, capture = false;
+	FOR_EACH_CONST(c, re) {
+		if (capture && c != _('?')) {
+			// change this capture into a non-capturing "(" by appending "?:"
+			ret += _("?:");
+			capture = false;
+		}
+		if (escape) { // second char of escape sequence
+			escape = false;
+		} else if (c == _('\\')) { // start of escape sequence
+			escape = true;
+		} else if (c == _('[')) { // start of [...]
+			bracket = true;
+		} else if (c == _(']')) { // end of [...]
+			bracket = false;
+		} else if (bracket && c == _('(')) {
+			// wx has a bug, it counts the '(' in "[(]" as a matching group
+			// escape it so wx doesn't see it
+			ret += _('\\');
+		} else if (c == _('(')) { // start of capture?
+			capture = true;
+		}
+		ret += c;
+	}
+	return ret;
+}