Support Chart.js 2.7.0 and 2.7.1

Author: nagix

samples/bar.html

@@ -6,7 +6,7 @@
 	<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Indie+Flower">
 	<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.3/Chart.min.js"></script>
 	<script src="https://cdnjs.cloudflare.com/ajax/libs/rough.js/3.0.0/rough.js"></script>
-	<script src="../dist/chartjs-plugin-rough.min.js"></script>
+	<script src="../dist/chartjs-plugin-rough.js"></script>
 	<style>
 		canvas {
 			-moz-user-select: none;

src/core/core.controller.js

@@ -4,6 +4,9 @@ import Chart from 'chart.js';
 
 var helpers = Chart.helpers;
 
+// For Chart.js 2.7.1 backward compatibility
+Chart.layouts = Chart.layouts || Chart.layoutService;
+
 // For Chart.js 2.7.3 backward compatibility
 helpers.canvas = helpers.canvas || {};
 helpers.canvas._isPointInArea = helpers.canvas._isPointInArea || function(point, area) {

src/plugins/plugin.rough.js

@@ -44,8 +44,10 @@ var descriptors = plugins.descriptors;
 plugins.descriptors = function(chart) {
 	var rough = chart._rough;
 
+	// Replace filler/legend plugins with rough filler/legend plugins
 	if (rough) {
-		var cache = chart.$plugins || (chart.$plugins = {});
+		// chart._plugins for Chart.js 2.7.1 backward compatibility
+		var cache = chart.$plugins || chart._plugins || (chart.$plugins = chart._plugins = {});
 		if (cache.id === this._cacheId) {
 			return cache.descriptors;
 		}
@@ -81,16 +83,24 @@ export default {
 		chart.buildOrUpdateControllers = function() {
 			var result;
 
+			// Replace controllers with rough controllers on creation
 			Chart.controllers = roughControllers;
 			result = Chart.prototype.buildOrUpdateControllers.apply(this, arguments);
 			Chart.controllers = controllers;
 
 			return result;
 		};
 
+		// Remove the existing legend if exists
 		if (chart.legend) {
 			Chart.layouts.removeBox(chart, chart.legend);
 			delete chart.legend;
 		}
+
+		// Invalidate plugin cache and create new one
+		delete chart.$plugins;
+		// For Chart.js 2.7.1 backward compatibility
+		delete chart._plugins;
+		plugins.descriptors(chart);
 	}
 };