fix(maxdepth): icicles fill up their domain if using maxdepth

Author: Coding-with-Adam

src/traces/icicle/draw_descendants.js

@@ -45,7 +45,8 @@ module.exports = function drawDescendants(gd, cd, entry, slices, opts) {
         orientation: trace.tiling.orientation,
         pad: {
             inner: trace.tiling.pad
-        }
+        },
+        maxDepth: trace._maxDepth
     });
 
     var sliceData = allData.descendants();

src/traces/icicle/partition.js

@@ -6,12 +6,16 @@ module.exports = function partition(entry, size, opts) {
     var flipX = opts.flipX;
     var flipY = opts.flipY;
     var swapXY = opts.orientation === 'h';
+    var maxDepth = opts.maxDepth;
+
+    // calculate partion size
+    var newWidth = (entry.height + 1) * size[0] / Math.min(entry.height, maxDepth);
 
     var result = d3Hierarchy
         .partition()
         .padding(opts.pad.inner)
         .size(
-            swapXY ? [size[1], size[0]] : size
+            swapXY ? [size[1], newWidth] : size
         )(entry);
 
     if(swapXY || flipX || flipY) {