function redraw()

in modules/ui/map_in_map.js [143:252]
85 lines of code
6 McCabe index (conditional complexity)

        function redraw() {
            clearTimeout(_timeoutID);
            if (_isHidden) return;

            updateProjection();
            var zMini = geoScaleToZoom(projection.scale());

            // setup tile container
            tiles = wrap
                .selectAll('.map-in-map-tiles')
                .data([0]);

            tiles = tiles.enter()
                .append('div')
                .attr('class', 'map-in-map-tiles')
                .merge(tiles);

            // redraw background
            backgroundLayer
                .source(context.background().baseLayerSource())
                .projection(projection)
                .dimensions(_dMini);

            var background = tiles
                .selectAll('.map-in-map-background')
                .data([0]);

            background.enter()
                .append('div')
                .attr('class', 'map-in-map-background')
                .merge(background)
                .call(backgroundLayer);


            // redraw overlay
            var overlaySources = context.background().overlayLayerSources();
            var activeOverlayLayers = [];
            for (var i = 0; i < overlaySources.length; i++) {
                if (overlaySources[i].validZoom(zMini)) {
                    if (!overlayLayers[i]) overlayLayers[i] = rendererTileLayer(context);
                    activeOverlayLayers.push(overlayLayers[i]
                        .source(overlaySources[i])
                        .projection(projection)
                        .dimensions(_dMini));
                }
            }

            var overlay = tiles
                .selectAll('.map-in-map-overlay')
                .data([0]);

            overlay = overlay.enter()
                .append('div')
                .attr('class', 'map-in-map-overlay')
                .merge(overlay);


            var overlays = overlay
                .selectAll('div')
                .data(activeOverlayLayers, function(d) { return d.source().name(); });

            overlays.exit()
                .remove();

            overlays = overlays.enter()
                .append('div')
                .merge(overlays)
                .each(function(layer) { d3_select(this).call(layer); });


            var dataLayers = tiles
                .selectAll('.map-in-map-data')
                .data([0]);

            dataLayers.exit()
                .remove();

            dataLayers = dataLayers.enter()
                .append('svg')
                .attr('class', 'map-in-map-data')
                .merge(dataLayers)
                .call(dataLayer)
                .call(debugLayer);


            // redraw viewport bounding box
            if (_gesture !== 'pan') {
                var getPath = d3_geoPath(projection);
                var bbox = { type: 'Polygon', coordinates: [context.map().extent().polygon()] };

                viewport = wrap.selectAll('.map-in-map-viewport')
                    .data([0]);

                viewport = viewport.enter()
                    .append('svg')
                    .attr('class', 'map-in-map-viewport')
                    .merge(viewport);


                var path = viewport.selectAll('.map-in-map-bbox')
                    .data([bbox]);

                path.enter()
                    .append('path')
                    .attr('class', 'map-in-map-bbox')
                    .merge(path)
                    .attr('d', getPath)
                    .classed('thick', function(d) { return getPath.area(d) < 30; });
            }
        }