pass hoverlayer to trace module hoverPoints

- in preparation for violin 'kde' hover handling

Author: etpinard

src/components/fx/hover.js

@@ -381,7 +381,7 @@ function _hover(gd, evt, subplot, noHoverEvent) {
 
         // Now find the points.
         if(trace._module && trace._module.hoverPoints) {
-            var newPoints = trace._module.hoverPoints(pointData, xval, yval, mode);
+            var newPoints = trace._module.hoverPoints(pointData, xval, yval, mode, fullLayout._hoverlayer);
             if(newPoints) {
                 var newPoint;
                 for(var newPointNum = 0; newPointNum < newPoints.length; newPointNum++) {

src/traces/contour/hover.js

@@ -11,7 +11,6 @@
 
 var heatmapHoverPoints = require('../heatmap/hover');
 
-
-module.exports = function hoverPoints(pointData, xval, yval, hovermode) {
-    return heatmapHoverPoints(pointData, xval, yval, hovermode, true);
+module.exports = function hoverPoints(pointData, xval, yval, hovermode, hoverLayer) {
+    return heatmapHoverPoints(pointData, xval, yval, hovermode, hoverLayer, true);
 };

src/traces/heatmap/hover.js

@@ -15,7 +15,7 @@ var Axes = require('../../plots/cartesian/axes');
 
 var MAXDIST = Fx.constants.MAXDIST;
 
-module.exports = function hoverPoints(pointData, xval, yval, hovermode, contour) {
+module.exports = function hoverPoints(pointData, xval, yval, hovermode, hoverLayer, contour) {
     // never let a heatmap override another type as closest point
     if(pointData.distance < MAXDIST) return;
 

src/traces/histogram2d/hover.js

@@ -12,8 +12,8 @@
 var heatmapHover = require('../heatmap/hover');
 var hoverLabelText = require('../../plots/cartesian/axes').hoverLabelText;
 
-module.exports = function hoverPoints(pointData, xval, yval, hovermode, contour) {
-    var pts = heatmapHover(pointData, xval, yval, hovermode, contour);
+module.exports = function hoverPoints(pointData, xval, yval, hovermode, hoverLayer, contour) {
+    var pts = heatmapHover(pointData, xval, yval, hovermode, hoverLayer, contour);
 
     if(!pts) return;