Add data.names API - #100

c3.js

@@ -3491,6 +3491,7 @@
 
             legend.selectAll('text')
                 .data(ids)
+                .text(function (id) { return isDefined(__data_names[id]) ? __data_names[id] : id; }) // MEMO: needed for update
                 .each(function (id, i) { updatePositions(this, id, i === 0); })
               .transition().duration(withTransition ? 250 : 0)
                 .attr('x', xForLegendText)
@@ -3824,6 +3825,12 @@
             var targets = getTargets(function (t) { return t.id === targetId; });
             return targets.length > 0 ? targets[0] : undefined;
         };
+        c3.data.names = function (names) {
+            if (!arguments.length) { return __data_names; }
+            __data_names = names;
+            updateLegend(c3.data.targets, {withTransition: true});
+            return __data_names;
+        };
 
         c3.resize = function (size) {
             __size_width = size ? size.width : null;