Function addTester

src/components/selections/select.js:1330–1348

(layoutPolygons, xRef, yRef, selectionTesters)

}

function addTester(layoutPolygons, xRef, yRef, selectionTesters) {
    var mergedPolygons;

    for(var i = 0; i < layoutPolygons.length; i++) {
        var currentPolygon = layoutPolygons[i];
        if(xRef !== currentPolygon.xref || yRef !== currentPolygon.yref) continue;

        if(mergedPolygons) {
            var subtract = !!currentPolygon.subtract;
            mergedPolygons = mergePolygons(mergedPolygons, currentPolygon, subtract);
            selectionTesters = multiTester(mergedPolygons);
        } else {
            mergedPolygons = [currentPolygon];
            selectionTesters = polygonTester(currentPolygon);
        }
    }

    return selectionTesters;
}

function getLayoutPolygons(gd, onlyActiveOnes) {
    var allPolygons = [];