Merge "Exclude Smartspace viewpager from ChangeBounds transition and set." into udc-qpr-dev

import androidx.annotation.VisibleForTesting;

import androidx.constraintlayout.widget.ConstraintLayout;

import androidx.constraintlayout.widget.ConstraintSet;

import androidx.viewpager.widget.ViewPager;

import com.android.app.animation.Interpolators;

import com.android.internal.jank.InteractionJankMonitor;

            // Excluding media from the transition on split-shade, as it doesn't transition

            // horizontally properly.

            transition.excludeTarget(R.id.status_view_media_container, true);

            // Exclude smartspace viewpager and its children from the transition.

            //     - Each step of the transition causes the ViewPager to invoke resize,

            //     which invokes scrolling to the recalculated position. The scrolling

            //     actions are congested, resulting in kinky translation, and

            //     delay in settling to the final position. (http://b/281620564#comment1)

            //     - Also, the scrolling is unnecessary in the transition. We just want

            //     the viewpager to stay on the same page.

            //     - Exclude by Class type instead of resource id, since the resource id

            //     isn't available for all devices, and probably better to exclude all

            //     ViewPagers any way.

            transition.excludeTarget(ViewPager.class, true);

            transition.excludeChildren(ViewPager.class, true);

        }

        transition.setInterpolator(Interpolators.FAST_OUT_SLOW_IN);

                adapter.setDuration(KEYGUARD_STATUS_VIEW_CUSTOM_CLOCK_MOVE_DURATION);

                adapter.addTarget(clockView);

                set.addTransition(adapter);

                if (splitShadeEnabled) {

                    // Exclude smartspace viewpager and its children from the transition set.

                    //     - This is necessary in addition to excluding them from the

                    //     ChangeBounds child transition.

                    //     - Without this, the viewpager is scrolled to the new position

                    //     (corresponding to its end size) before the size change is realized.

                    //     Note that the size change is realized at the end of the ChangeBounds

                    //     transition. With the "prescrolling", the viewpager ends up in a weird

                    //     position, then recovers smoothly during the transition, and ends at

                    //     the position for the current page.

                    //     - Exclude by Class type instead of resource id, since the resource id

                    //     isn't available for all devices, and probably better to exclude all

                    //     ViewPagers any way.

                    set.excludeTarget(ViewPager.class, true);

                    set.excludeChildren(ViewPager.class, true);

                }

                set.addListener(mKeyguardStatusAlignmentTransitionListener);

                TransitionManager.beginDelayedTransition(notifContainerParent, set);

            }