add cartesian plot index + register it in plotly.js

Author: etpinard

src/plotly.js

@@ -33,7 +33,10 @@ exports.MathJaxConfig = require('./fonts/mathjax_config');
 exports.defaultConfig = require('./plot_api/plot_config');
 
 // plots
-exports.Plots = require('./plots/plots');
+var Plots = exports.Plots = require('./plots/plots');
+
+var Cartesian = require('./plots/cartesian');
+Plots.registerSubplot(Cartesian);
 exports.Axes = require('./plots/cartesian/axes');
 exports.Fx = require('./plots/cartesian/graph_interact');
 exports.Scene = require('./plots/gl3d/scene');

src/plots/cartesian/axes.js

@@ -15,10 +15,6 @@ var isNumeric = require('fast-isnumeric');
 
 var axes = module.exports = {};
 
-axes.attributes = require('./attributes');
-
-Plotly.Plots.registerSubplot('cartesian', ['xaxis', 'yaxis'], ['x', 'y'], axes.attributes);
-
 axes.layoutAttributes = require('./layout_attributes');
 
 var xAxisMatch = /^xaxis[0-9]*$/,

src/plots/cartesian/index.js

@@ -0,0 +1,21 @@
+/**
+* Copyright 2012-2016, Plotly, Inc.
+* All rights reserved.
+*
+* This source code is licensed under the MIT license found in the
+* LICENSE file in the root directory of this source tree.
+*/
+
+
+'use strict';
+
+var Plotly = require('../../plotly');
+
+
+exports.type = 'cartesian';
+
+exports.attr = ['xaxis', 'yaxis'];
+
+exports.idRoot = ['x', 'y'];
+
+exports.attributes = require('./attributes');