DRY up trace hoverlabel attrs

... using their layout hoverlabel counterparts

Author: etpinard

src/components/fx/attributes.js

@@ -9,49 +9,25 @@
 'use strict';
 
 var fontAttrs = require('../../plots/font_attributes');
+var hoverLabelAttrs = require('./layout_attributes').hoverlabel;
+var extendFlat = require('../../extend').extendFlat;
 
 module.exports = {
     hoverlabel: {
-        bgcolor: {
-            valType: 'color',
-            role: 'style',
+        bgcolor: extendFlat({}, hoverLabelAttrs.bgcolor, {
             arrayOk: true,
-            editType: 'none',
-            description: [
-                'Sets the background color of the hover labels for this trace'
-            ].join(' ')
-        },
-        bordercolor: {
-            valType: 'color',
-            role: 'style',
+            description: 'Sets the background color of the hover labels for this trace'
+        }),
+        bordercolor: extendFlat({}, hoverLabelAttrs.bordercolor, {
             arrayOk: true,
-            editType: 'none',
-            description: [
-                'Sets the border color of the hover labels for this trace.'
-            ].join(' ')
-        },
+            description: 'Sets the border color of the hover labels for this trace.'
+        }),
         font: fontAttrs({
             arrayOk: true,
             editType: 'none',
             description: 'Sets the font used in hover labels.'
         }),
-        namelength: {
-            valType: 'integer',
-            min: -1,
-            dflt: 15,
-            arrayOk: true,
-            role: 'style',
-            editType: 'none',
-            description: [
-                'Sets the length (in number of characters) of the trace name in',
-                'the hover labels for this trace. -1 shows the whole name',
-                'regardless of length. 0-3 shows the first 0-3 characters, and',
-                'an integer >3 will show the whole name if it is less than that',
-                'many characters, but if it is longer, will truncate to',
-                '`namelength - 3` characters and add an ellipsis.',
-                'Note that when `hovertemplate` is set, `namelength` defaults to *-1*.'
-            ].join(' ')
-        },
-        editType: 'calc'
+        namelength: extendFlat({}, hoverLabelAttrs.namelength, {arrayOk: true}),
+        editType: 'none'
     }
 };