Function _getAlignmentData

docs/app/js/sanddance-app.js:32021–32025

* Get's the alignment data for the given information. This only really matters if the positioning is Auto. * If it is auto then the alignmentEdge should be chosen based on the target edge's position relative to * the center of the page.

(positionData, target, boundingRect, coverTarget, alignTargetEdge)

 * If it is auto then the alignmentEdge should be chosen based on the target edge's position relative to
 * the center of the page.
 */ function _getAlignmentData(positionData, target, boundingRect, coverTarget, alignTargetEdge) {
    if (positionData.isAuto) positionData.alignmentEdge = getClosestEdge(positionData.targetEdge, target, boundingRect);
    positionData.alignTargetEdge = alignTargetEdge;
    return positionData;
}
function getClosestEdge(targetEdge, target, boundingRect) {
    var targetCenter = _getCenterValue(target, targetEdge);
    var boundingCenter = _getCenterValue(boundingRect, targetEdge);