Method contains

src/main/java/org/jsoup/select/QueryParser.java:444–455

(boolean own)

    // pseudo selector :contains(text), containsOwn(text)
    private Evaluator contains(boolean own) {
        String query = own ? ":containsOwn" : ":contains";
        String searchText = TokenQueue.unescape(consumeParens());
        Validate.notEmpty(searchText, query + "(text) query must not be empty");

        if (inNodeContext)
            return new NodeEvaluator.ContainsValue(searchText);

        return own
            ? new Evaluator.ContainsOwnText(searchText)
            : new Evaluator.ContainsText(searchText);
    }

    private Evaluator containsWholeText(boolean own) {
        String query = own ? ":containsWholeOwnText" : ":containsWholeText";