Method containsControlChars

app/src/main/java/eu/faircode/email/Helper.java:2658–2673

(String text)

    }

    static boolean containsControlChars(String text) {
        int codePoint;
        for (int offset = 0; offset < text.length(); ) {
            codePoint = text.codePointAt(offset);
            offset += Character.charCount(codePoint);
            switch (Character.getType(codePoint)) {
                case Character.CONTROL:     // \p{Cc}
                case Character.FORMAT:      // \p{Cf}
                case Character.PRIVATE_USE: // \p{Co}
                case Character.SURROGATE:   // \p{Cs}
                case Character.UNASSIGNED:  // \p{Cn}
                    return true;
            }
        }
        return false;
    }

    static Integer parseInt(String text) {
        if (TextUtils.isEmpty(text))