Function streamParameters

docs/app/js/sanddance-app.js:147170–147189

(entry4, stream, scope)

    return Object.keys(entry3).length === 1 ? id : scope.addStream(entry3).id;
}
function streamParameters(entry4, stream, scope) {
    let param1 = stream.between;
    if (param1) {
        if (param1.length !== 2) (0, _vegaUtil.error)('Stream "between" parameter must have 2 entries: ' + (0, _vegaUtil.stringValue)(stream));
        entry4.between = [
            parseStream(param1[0], scope),
            parseStream(param1[1], scope)
        ];
    }
    param1 = stream.filter ? [].concat(stream.filter) : [];
    if (stream.marktype || stream.markname || stream.markrole) // add filter for mark type, name and/or role
    param1.push(filterMark(stream.marktype, stream.markname, stream.markrole));
    if (stream.source === Scope$1) // add filter to limit events from sub-scope only
    param1.push("inScope(event.item)");
    if (param1.length) entry4.filter = (0, _vegaFunctions.parseExpression)("(" + param1.join(")&&(") + ")", scope).$expr;
    if ((param1 = stream.throttle) != null) entry4.throttle = +param1;
    if ((param1 = stream.debounce) != null) entry4.debounce = +param1;
    if (stream.consume) entry4.consume = true;
    return entry4;
}
function filterMark(type, name, role) {
    const item = "event.item";
    return item + (type && type !== "*" ? "&&" + item + ".mark.marktype==='" + type + "'" : "") + (role ? "&&" + item + ".mark.role==='" + role + "'" : "") + (name ? "&&" + item + ".mark.name==='" + name + "'" : "");