plotly#189 putting categorymode, categorylist and coercion into use

Author: monfera

src/plot_api/plot_api.js

@@ -854,10 +854,10 @@ function doCalcdata(gd) {
     fullLayout._piecolormap = {};
     fullLayout._piedefaultcolorcount = 0;
 
-    // delete category list, if there is one, so we start over
+    // initialize the category list, if there is one, so we start over
     // to be filled in later by ax.d2c
     for(i = 0; i < axList.length; i++) {
-        axList[i]._categories = [];
+        axList[i]._categories = axList[i]._initialCategories.slice();
     }
 
     for(i = 0; i < fullData.length; i++) {

src/plots/cartesian/axis_defaults.js

@@ -20,7 +20,9 @@ var layoutAttributes = require('./layout_attributes');
 var handleTickValueDefaults = require('./tick_value_defaults');
 var handleTickMarkDefaults = require('./tick_mark_defaults');
 var handleTickLabelDefaults = require('./tick_label_defaults');
+var handleCategoryModeDefaults = require('./category_mode_defaults');
 var setConvert = require('./set_convert');
+var orderedCategories = require('./ordered_categories');
 var cleanDatum = require('./clean_datum');
 var axisIds = require('./axis_ids');
 
@@ -72,6 +74,10 @@ module.exports = function handleAxisDefaults(containerIn, containerOut, coerce,
         }
     }
 
+    containerOut._initialCategories = axType === 'category' ?
+        orderedCategories(letter, containerIn.categorymode, containerIn.categorylist, options.data) :
+        [];
+
     setConvert(containerOut);
 
     var dfltColor = coerce('color');
@@ -105,6 +111,7 @@ module.exports = function handleAxisDefaults(containerIn, containerOut, coerce,
     handleTickValueDefaults(containerIn, containerOut, coerce, axType);
     handleTickLabelDefaults(containerIn, containerOut, coerce, axType, options);
     handleTickMarkDefaults(containerIn, containerOut, coerce, options);
+    handleCategoryModeDefaults(containerIn, containerOut, coerce);
 
     var lineColor = coerce2('linecolor', dfltColor),
         lineWidth = coerce2('linewidth'),

src/plots/cartesian/set_convert.js

@@ -182,8 +182,9 @@ module.exports = function setConvert(ax) {
             // encounters them, ie all the categories from the
             // first data set, then all the ones from the second
             // that aren't in the first etc.
-            // TODO: sorting options - do the sorting
-            // progressively here as we insert?
+            // it is assumed that this function is being invoked in the
+            // already sorted category order; otherwise there would be
+            // a disconnect between the array and the index returned
 
             if(v !== null && v !== undefined && ax._categories.indexOf(v) === -1) {
                 ax._categories.push(v);