🔧 Do not import the ShaderFactory in the preferences process

src/effects/Doom.js

@@ -16,7 +16,8 @@
 
 const _ = imports.gettext.domain('burn-my-windows').gettext;
 
-import {ShaderFactory} from '../ShaderFactory.js';
+const ShaderFactory =
+  typeof global !== 'undefined' ? (await import('../ShaderFactory.js'))?.default : null;
 
 //////////////////////////////////////////////////////////////////////////////////////////
 // This effect melts your windows. Inspired by the legendary screen transitions of the  //
@@ -33,7 +34,7 @@ export default class Effect {
   // GLSL file in resources/shaders/<nick>.glsl. The callback will be called for each
   // newly created shader instance.
   constructor() {
-    this.shaderFactory = new ShaderFactory(this.getNick(), (shader) => {
+    this.shaderFactory = new ShaderFactory(Effect.getNick(), (shader) => {
       // Store uniform locations of newly created shaders.
       shader._uActorScale      = shader.get_uniform_location('uActorScale');
       shader._uHorizontalScale = shader.get_uniform_location('uHorizontalScale');
@@ -65,7 +66,7 @@ export default class Effect {
 
   // The effect is not available on GNOME Shell 3.36 as it requires scaling of the window
   // actor.
-  getMinShellVersion() {
+  static getMinShellVersion() {
     return [3, 38];
   }
 
@@ -73,13 +74,13 @@ export default class Effect {
   // required. It should match the prefix of the settings keys which store whether the
   // effect is enabled currently (e.g. '*-enable-effect'), and its animation time
   // (e.g. '*-animation-time').
-  getNick() {
+  static getNick() {
     return 'doom';
   }
 
   // This will be shown in the sidebar of the preferences dialog as well as in the
   // drop-down menus where the user can choose the effect.
-  getLabel() {
+  static getLabel() {
     return _('Doom');
   }
 
@@ -87,7 +88,7 @@ export default class Effect {
 
   // This is called by the preferences dialog whenever a new effect profile is loaded. It
   // binds all user interface elements to the respective settings keys of the profile.
-  bindPreferences(dialog) {
+  static bindPreferences(dialog) {
     dialog.bindAdjustment('doom-animation-time');
     dialog.bindAdjustment('doom-horizontal-scale');
     dialog.bindAdjustment('doom-vertical-scale');