move getShowAttrDflt function to a separate file

Author: archmoj

src/plots/cartesian/show_dflt.js

@@ -0,0 +1,29 @@
+'use strict';
+
+/*
+ * Attributes 'showexponent', 'showtickprefix' and 'showticksuffix'
+ * share values.
+ *
+ * If only 1 attribute is set,
+ * the remaining attributes inherit that value.
+ *
+ * If 2 attributes are set to the same value,
+ * the remaining attribute inherits that value.
+ *
+ * If 2 attributes are set to different values,
+ * the remaining is set to its dflt value.
+ *
+ */
+module.exports = function getShowAttrDflt(containerIn) {
+    var showAttrsAll = ['showexponent', 'showtickprefix', 'showticksuffix'];
+    var showAttrs = showAttrsAll.filter(function(a) {
+        return containerIn[a] !== undefined;
+    });
+    var sameVal = function(a) {
+        return containerIn[a] === containerIn[showAttrs[0]];
+    };
+
+    if(showAttrs.every(sameVal) || showAttrs.length === 1) {
+        return containerIn[showAttrs[0]];
+    }
+};

src/plots/cartesian/tick_label_defaults.js

@@ -3,6 +3,7 @@
 var Lib = require('../../lib');
 var contrast = require('../../components/color').contrast;
 var layoutAttributes = require('./layout_attributes');
+var getShowAttrDflt = require('./show_dflt');
 var handleArrayContainerDefaults = require('../array_container_defaults');
 
 module.exports = function handleTickLabelDefaults(containerIn, containerOut, coerce, axType, options, config) {
@@ -69,34 +70,6 @@ function handleOtherDefaults(containerIn, containerOut, coerce, axType, options)
     }
 }
 
-/*
- * Attributes 'showexponent', 'showtickprefix' and 'showticksuffix'
- * share values.
- *
- * If only 1 attribute is set,
- * the remaining attributes inherit that value.
- *
- * If 2 attributes are set to the same value,
- * the remaining attribute inherits that value.
- *
- * If 2 attributes are set to different values,
- * the remaining is set to its dflt value.
- *
- */
-function getShowAttrDflt(containerIn) {
-    var showAttrsAll = ['showexponent', 'showtickprefix', 'showticksuffix'];
-    var showAttrs = showAttrsAll.filter(function(a) {
-        return containerIn[a] !== undefined;
-    });
-    var sameVal = function(a) {
-        return containerIn[a] === containerIn[showAttrs[0]];
-    };
-
-    if(showAttrs.every(sameVal) || showAttrs.length === 1) {
-        return containerIn[showAttrs[0]];
-    }
-}
-
 function tickformatstopDefaults(valueIn, valueOut) {
     function coerce(attr, dflt) {
         return Lib.coerce(valueIn, valueOut, layoutAttributes.tickformatstops, attr, dflt);