fix: move this.displayCodeHighlights to CanvasDrawer

Author: aminya

lib/minimap-element.js

@@ -137,10 +137,7 @@ class MinimapElement {
     * @access private
     */
     this.textOpacity = undefined
-    /**
-    * @access private
-    */
-    this.displayCodeHighlights = undefined
+
     /**
     * @access private
     */
@@ -262,7 +259,7 @@ class MinimapElement {
       }),
 
       atom.config.observe('minimap.displayCodeHighlights', (displayCodeHighlights) => {
-        this.displayCodeHighlights = displayCodeHighlights
+        this.CanvasDrawer.displayCodeHighlights = displayCodeHighlights
 
         if (this.attached) { this.requestForcedUpdate() }
       }),
@@ -901,7 +898,7 @@ class MinimapElement {
    *                                        highlights or not
    */
   setDisplayCodeHighlights (displayCodeHighlights) {
-    this.displayCodeHighlights = displayCodeHighlights
+    this.CanvasDrawer.displayCodeHighlights = displayCodeHighlights
     if (this.attached) { this.requestForcedUpdate() }
   }
 

lib/mixins/canvas-drawer.js

@@ -17,6 +17,8 @@ export default class CanvasDrawer {
   constructor () {
     // set in setModel of minimapElement
     this.minimap = undefined
+    // set by minimapElement
+    this.displayCodeHighlights = undefined
 
     /**
      * This MinimapElement's DOMStylesReader