function hover()

in modules/ui/sidebar.js [178:277]
78 lines of code
24 McCabe index (conditional complexity)

        function hover(targets) {
            var datum = targets && targets.length && targets[0];
            if (datum && datum.__featurehash__) { // hovering on data
                _wasData = true;
                sidebar
                    .show(dataEditor.datum(datum));

                selection.selectAll('.sidebar-component')
                    .classed('inspector-hover', true);

            } else if (datum && datum.__fbid__) { // hovering on RapiD data
                _wasRapiD = true;
                sidebar
                    .show(rapidInspector.datum(datum));

                selection.selectAll('.sidebar-component')
                    .classed('inspector-hover', true)
                    .classed('rapid-inspector-fadein', true);


            } else if (datum instanceof osmNote) {
                if (context.mode().id === 'drag-note') return;
                _wasNote = true;

                var osm = services.osm;
                if (osm) {
                    datum = osm.getNote(datum.id); // marker may contain stale data - get latest
                }

                sidebar
                    .show(noteEditor.note(datum));

                selection.selectAll('.sidebar-component')
                    .classed('inspector-hover', true);

            } else if (datum instanceof QAItem) {
                _wasQaItem = true;

                var errService = services[datum.service];
                if (errService) {
                    // marker may contain stale data - get latest
                    datum = errService.getError(datum.id);
                }

                // Currently only three possible services
                var errEditor;
                if (datum.service === 'keepRight') {
                    errEditor = keepRightEditor;
                } else if (datum.service === 'osmose') {
                    errEditor = osmoseEditor;
                } else {
                    errEditor = improveOsmEditor;
                }

                context.container().selectAll('.qaItem.' + datum.service)
                    .classed('hover', function(d) { return d.id === datum.id; });

                sidebar
                    .show(errEditor.error(datum));

                selection.selectAll('.sidebar-component')
                    .classed('inspector-hover', true);

            } else if (!_current && (datum instanceof osmEntity)) {
                featureListWrap
                    .classed('inspector-hidden', true);

                inspectorWrap
                    .classed('inspector-hidden', false)
                    .classed('inspector-hover', true);

                if (!inspector.entityIDs() || !utilArrayIdentical(inspector.entityIDs(), [datum.id]) || inspector.state() !== 'hover') {
                    inspector
                        .state('hover')
                        .entityIDs([datum.id])
                        .newFeature(false);

                    inspectorWrap
                        .call(inspector);
                }

            } else if (!_current) {
                featureListWrap
                    .classed('inspector-hidden', false);
                inspectorWrap
                    .classed('inspector-hidden', true);
                inspector
                    .state('hide');

            } else if (_wasRapiD || _wasData || _wasNote || _wasQaItem) {
                _wasRapiD = false;
                _wasNote = false;
                _wasData = false;
                _wasQaItem = false;
                context.container().selectAll('.layer-ai-features .hover').classed('hover', false);
                context.container().selectAll('.note').classed('hover', false);
                context.container().selectAll('.qaItem').classed('hover', false);
                sidebar.hide();
            }
        }