Merge "Post the onTransitionAnimationEnd() work to the main thread." into main

            Log.d(TAG, "Animation ended")

        }

        // TODO(b/330672236): Post this to the main thread instead so that it does not

        // flicker with Flexiglass enabled.

        val onEnd = {

            controller.onTransitionAnimationEnd(isExpandingFullyAbove)

            transitionContainerOverlay.remove(windowBackgroundLayer)

                openingWindowSyncViewOverlay?.remove(windowBackgroundLayer)

            }

        }

        // TODO(b/330672236): Post this to the main thread for launches as well, so that they do not

        //   flicker with Flexiglass enabled.

        if (controller.isLaunching) {

            onEnd()

        } else {

            // onAnimationEnd is called at the end of the animation, on a Choreographer animation

            // tick. During dialog launches, the following calls will move the animated content from

            // the dialog overlay back to its original position, and this change must be reflected

            // in the next frame given that we then sync the next frame of both the content and

            // dialog ViewRoots. During SysUI activity launches, we will instantly collapse the

            // shade at the end of the transition. However, if those are rendered by Compose, whose

            // compositions are also scheduled on a Choreographer frame, any state change made

            // *right now* won't be reflected in the next frame given that a Choreographer frame

            // can't schedule another and have it happen in the same frame. So we post the forwarded

            // calls to [Controller.onLaunchAnimationEnd] in the main executor, leaving this

            // Choreographer frame, ensuring that any state change applied by

            // onTransitionAnimationEnd() will be reflected in the same frame.

            mainExecutor.execute { onEnd() }

        }

    }

    /** Returns whether is the controller's view should be visible with the given [timings]. */

    private fun checkVisibility(timings: Timings, progress: Float, isLaunching: Boolean): Boolean {