Get page path or component path inside dialog field validator

How can I get the current page path e.g. /content/site/en/pageName or the current component path e.g. /content/site/en/pageName/jcr:content/component from within a dialog field validator (foundation.validation.validator)

registry.register("foundation.validation.validator", {
    selector: "[data-foundation-validation=someValidator]",
    validate: function(el) {
     // Some code to get page or component URL to make AJAX call
    }
});