Function selectionTest

docs/app/js/sanddance-app.js:144622–144645

* Tests if a tuple is contained within an interactive selection. * @param {string} name - The name of the data set representing the selection. * Tuples in the dataset are of the form * {unit: string, fields: array , values: array<*>}. * Fielddef is of the form * {field: string, cha

(name, datum, op)

 *   One of 'intersect' or 'union' (default).
 * @return {boolean} - True if the datum is in the selection, false otherwise.
 */ function selectionTest(name, datum, op) {
    var data = this.context.data[name], entries = data ? data.values.value : [], unitIdx = data ? data[UNIT_INDEX] && data[UNIT_INDEX].value : undefined, intersect = op === Intersect, n = entries.length, i = 0, entry, miss, count, unit, b;
    for(; i < n; ++i){
        entry = entries[i];
        if (unitIdx && intersect) {
            // multi selections union within the same unit and intersect across units.
            miss = miss || {};
            count = miss[unit = entry.unit] || 0; // if we've already matched this unit, skip.
            if (count === -1) continue;
            b = testPoint(datum, entry);
            miss[unit] = b ? -1 : ++count; // if we match and there are no other units return true
            // if we've missed against all tuples in this unit return false
            if (b && unitIdx.size === 1) return true;
            if (!b && count === unitIdx.get(unit).count) return false;
        } else {
            b = testPoint(datum, entry); // if we find a miss and we do require intersection return false
            // if we find a match and we don't require intersection return true
            if (intersect ^ b) return b;
        }
    } // if intersecting and we made it here, then we saw no misses
    // if not intersecting, then we saw no matches
    // if no active selections, return false
    return n && intersect;
}
const bisect = (0, _d3Array.bisector)($selectionId), bisectLeft = bisect.left, bisectRight = bisect.right;
function selectionIdTest(name, datum, op) {
    const data = this.context.data[name], entries = data ? data.values.value : [], unitIdx = data ? data[UNIT_INDEX] && data[UNIT_INDEX].value : undefined, intersect = op === Intersect, value = $selectionId(datum), index = bisectLeft(entries, value);