Function parseView

docs/app/js/sanddance-app.js:149363–149399

(spec, scope)

        }
    }, spec);
function parseView(spec, scope) {
    const config = scope.config; // add scenegraph root
    const root = ref(scope.root = scope.add(operator())); // parse top-level signal definitions
    const signals = collectSignals(spec, config);
    signals.forEach((_)=>parseSignal(_, scope)); // assign description, event, legend, and locale configuration
    scope.description = spec.description || config.description;
    scope.eventConfig = config.events;
    scope.legends = scope.objectProperty(config.legend && config.legend.layout);
    scope.locale = config.locale; // store root group item
    const input = scope.add(Collect()); // encode root group item
    const encode = scope.add(Encode(parseEncode(rootEncode(spec.encode), GroupMark, FrameRole, spec.style, scope, {
        pulse: ref(input)
    }))); // perform view layout
    const parent = scope.add(ViewLayout({
        layout: scope.objectProperty(spec.layout),
        legends: scope.legends,
        autosize: scope.signalRef("autosize"),
        mark: root,
        pulse: ref(encode)
    }));
    scope.operators.pop(); // parse remainder of specification
    scope.pushState(ref(encode), ref(parent), null);
    parseScope(spec, scope, signals);
    scope.operators.push(parent); // bound / render / sieve root item
    let op = scope.add(Bound({
        mark: root,
        pulse: ref(parent)
    }));
    op = scope.add(Render({
        pulse: ref(op)
    }));
    op = scope.add(Sieve({
        pulse: ref(op)
    })); // track metadata for root item
    scope.addData("root", new DataScope(scope, input, input, op));
    return scope;
}
function signalObject(name, value19) {
    return value19 && value19.signal ? {
        name,