Use Perl-compatible regexes for RSS rules. Closes #6367.

--HG--
branch : magao-dev

src/base/utils/string.cpp

@@ -37,6 +37,7 @@
 #ifdef QBT_USES_QT5
 #include <QCollator>
 #endif
+#include <QRegExp>
 #ifdef Q_OS_MAC
 #include <QThreadStorage>
 #endif
@@ -211,3 +212,13 @@ bool Utils::String::slowEquals(const QByteArray &a, const QByteArray &b)
 
     return (diff == 0);
 }
+
+// This is marked as internal in QRegExp.cpp, but is exported. The alternative would be to
+// copy the code from QRegExp::wc2rx().
+QString qt_regexp_toCanonical(const QString &pattern, QRegExp::PatternSyntax patternSyntax);
+
+QString Utils::String::wildcardToRegex(const QString &pattern)
+{
+    return qt_regexp_toCanonical(pattern, QRegExp::Wildcard);
+}
+

src/base/utils/string.h

@@ -49,6 +49,8 @@ namespace Utils
 
         bool naturalCompareCaseSensitive(const QString &left, const QString &right);
         bool naturalCompareCaseInsensitive(const QString &left, const QString &right);
+
+        QString wildcardToRegex(const QString &pattern);
     }
 }