fix rwd/ffwd button pos when animation is running, clean up rwd/ffwd animation handling

app/src/main/java/org/mosad/teapod/ui/activity/player/PlayerActivity.kt

@@ -229,7 +229,11 @@ class PlayerActivity : AppCompatActivity() {
                     else -> View.GONE
                 }
 
-                controlsBinding.exoPlayPause.isVisible = !playerBinding.loading.isVisible
+                // don't use isVisible to hide exoPlayPause, as it will set the visibility to GONE
+                controlsBinding.exoPlayPause.visibility = when(playerBinding.loading.isVisible) {
+                    true -> View.INVISIBLE
+                    false -> View.VISIBLE
+                }
 
                 if (state == ExoPlayer.STATE_ENDED && hasNextEpisode() && Preferences.autoplay) {
                     playNextEpisode()
@@ -383,44 +387,14 @@ class PlayerActivity : AppCompatActivity() {
         return (model.currentEpisode.nextEpisodeId != null && !model.currentEpisodeIsLastEpisode())
     }
 
-    /**
-     * TODO set position of rewind/fast forward indicators programmatically
-     */
-
     private fun rewind() {
         model.seekToOffset(rwdTime)
-
-        // hide/show needed components
-        playerBinding.exoDoubleTapIndicator.visibility = View.VISIBLE
-        playerBinding.ffwd10Indicator.visibility = View.INVISIBLE
-        controlsBinding.rwd10.visibility = View.INVISIBLE
-
-        playerBinding.rwd10Indicator.onAnimationEndCallback = {
-            playerBinding.exoDoubleTapIndicator.visibility = View.GONE
-            playerBinding.ffwd10Indicator.visibility = View.VISIBLE
-            controlsBinding.rwd10.visibility = View.VISIBLE
-        }
-
-        // run animation
-        playerBinding.rwd10Indicator.runOnClickAnimation()
+        controlsBinding.rwd10.runOnClickAnimation()
     }
 
     private fun fastForward() {
         model.seekToOffset(fwdTime)
-
-        // hide/show needed components
-        playerBinding.exoDoubleTapIndicator.visibility = View.VISIBLE
-        playerBinding.rwd10Indicator.visibility = View.INVISIBLE
-        controlsBinding.ffwd10.visibility = View.INVISIBLE
-
-        playerBinding.ffwd10Indicator.onAnimationEndCallback = {
-            playerBinding.exoDoubleTapIndicator.visibility = View.GONE
-            playerBinding.rwd10Indicator.visibility = View.VISIBLE
-            controlsBinding.ffwd10.visibility = View.VISIBLE
-        }
-
-        // run animation
-        playerBinding.ffwd10Indicator.runOnClickAnimation()
+        controlsBinding.ffwd10.runOnClickAnimation()
     }
 
     private fun playNextEpisode() {