first commit

src/api/v4/style/base.js

@@ -0,0 +1,33 @@
+var _ = require('underscore');
+var Backbone = require('backbone');
+
+/**
+ * Base style object.
+ *
+ * @fires error
+ * @constructor
+ * @abstract
+ * @memberof carto.style
+ * @api
+ */
+function Base () {}
+
+_.extend(Base.prototype, Backbone.Events);
+
+Base.prototype.$setError = function (cartoError) {
+  this._error = cartoError;
+  this.trigger('error', cartoError);
+};
+
+Base.prototype.$setEngine = function (newEngine) {
+  if (this._engine && this._engine !== newEngine) {
+    throw new Error('CartoCSS engine cannot be changed');
+  }
+  this._engine = newEngine;
+};
+
+Base.prototype.$getEngine = function () {
+  return this._engine;
+};
+
+module.exports = Base;