🎉 Allow setting actor transitions in overview

src/TRexAttack.js

@@ -42,7 +42,8 @@ var TRexAttack = class TRexAttack {
 
   // This will be called in various places where a unique identifier for this effect is
   // required. It should match the prefix of the settings keys which store whether the
-  // effect is enabled currently (e.g. the '*-close-effect').
+  // effect is enabled currently (e.g. '*-close-effect'), and its animation time
+  // (e.g. '*-animation-time').
   static getNick() {
     return 'trex';
   }
@@ -84,26 +85,17 @@ var TRexAttack = class TRexAttack {
     return new Shader(settings);
   }
 
-  // This is also called from extension.js. It is used to tweak the ongoing transitions of
+  // This is also called from extension.js. It is used to tweak the ongoing transition of
   // the actor - usually windows are faded to transparency and scaled down slightly by
-  // GNOME Shell. Here, we modify this behavior as well as the transition duration.
-  static tweakTransitions(actor, settings) {
-    const animationTime = settings.get_int('trex-animation-time');
-
-    const tweakTransition = (property, value) => {
-      const transition = actor.get_transition(property);
-      if (transition) {
-        transition.set_to(value);
-        transition.set_duration(animationTime);
-      }
-    };
-
-    // For this effect, we slightly increase the window's scale as part of the warp
-    // effect.
+  // GNOME Shell. For this effect, we slightly increase the window's scale as part of the
+  // warp effect.
+  static getCloseTransition(actor, settings) {
     const warp = 0.5 * settings.get_double('claw-scratch-warp');
-    tweakTransition('opacity', 255);
-    tweakTransition('scale-x', 1.0 + warp);
-    tweakTransition('scale-y', 1.0 + warp);
+    return {
+      'opacity': {to: 255},
+      'scale-x': {to: 1.0 + warp},
+      'scale-y': {to: 1.0 + warp}
+    };
   }
 }