sankey fix translateX for subplots

Author: antoinerg

src/traces/sankey/render.js

@@ -172,7 +172,7 @@ function sankeyModel(layout, d, traceIndex) {
         valueFormat: valueFormat,
         valueSuffix: valueSuffix,
         textFont: textFont,
-        translateX: domain.x[0] * width + layout.margin.l,
+        translateX: domain.x[0] * layout.width + layout.margin.l,
         translateY: layout.height - domain.y[1] * layout.height + layout.margin.t,
         dragParallel: horizontal ? height : width,
         dragPerpendicular: horizontal ? width : height,

test/image/mocks/sankey_subplots.json

@@ -0,0 +1,46 @@
+{
+    "data": [{
+            "domain": {
+                "x": [0, 0.45]
+            },
+            "type": "sankey",
+            "orientation": "h",
+            "node": {
+                "line": {
+                    "color": "black"
+                },
+                "label": ["el1", "el2", "el3"]
+            },
+            "link": {
+                "source": [0, 2],
+                "target": [1, 1],
+                "value": [120, 50],
+                "label": ["stram1", "stream2"]
+            }
+        },
+        {
+            "domain": {
+                "x": [0.55, 1]
+            },
+            "type": "sankey",
+            "orientation": "h",
+            "node": {
+                "line": {
+                    "color": "black"
+                },
+                "label": ["el4", "el5", "el6"]
+            },
+            "link": {
+                "source": [0, 2],
+                "target": [1, 1],
+                "value": [120, 50],
+                "label": ["stram4", "stream5"]
+            }
+        }
+    ],
+    "layout": {
+        "title": "Multiple Sankey plots",
+        "autosize": true,
+        "showlegend": false
+    }
+}