/*
 * Copyright (C) 2013 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package android.transition;

import android.animation.Animator;
import android.animation.Animator.AnimatorListener;
import android.animation.Animator.AnimatorPauseListener;
import android.annotation.IntDef;
import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;

import com.android.internal.R;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

This transition tracks changes to the visibility of target views in the start and end scenes. Visibility is determined not just by the View.setVisibility(int) state of views, but also whether views exist in the current view hierarchy. The class is intended to be a utility for subclasses such as Fade, which use this visibility information to determine the specific animations to run when visibility changes occur. Subclasses should implement one or both of the methods onAppear(ViewGroup, TransitionValues, int, TransitionValues, int), onDisappear(ViewGroup, TransitionValues, int, TransitionValues, int) or onAppear(ViewGroup, View, TransitionValues, TransitionValues), onDisappear(ViewGroup, View, TransitionValues, TransitionValues). /**
 * This transition tracks changes to the visibility of target views in the
 * start and end scenes. Visibility is determined not just by the
 * {@link View#setVisibility(int)} state of views, but also whether
 * views exist in the current view hierarchy. The class is intended to be a
 * utility for subclasses such as {@link Fade}, which use this visibility
 * information to determine the specific animations to run when visibility
 * changes occur. Subclasses should implement one or both of the methods
 * {@link #onAppear(ViewGroup, TransitionValues, int, TransitionValues, int)},
 * {@link #onDisappear(ViewGroup, TransitionValues, int, TransitionValues, int)} or
 * {@link #onAppear(ViewGroup, View, TransitionValues, TransitionValues)},
 * {@link #onDisappear(ViewGroup, View, TransitionValues, TransitionValues)}.
 */
public abstract class Visibility extends Transition {

    static final String PROPNAME_VISIBILITY = "android:visibility:visibility";
    private static final String PROPNAME_PARENT = "android:visibility:parent";
    private static final String PROPNAME_SCREEN_LOCATION = "android:visibility:screenLocation";

    
@hide
/** @hide */
    @Retention(RetentionPolicy.SOURCE)
    @IntDef(flag = true, prefix = { "MODE_" }, value = {
            MODE_IN,
            MODE_OUT
    })
    @interface VisibilityMode {}

    
Mode used in setMode(int) to make the transition operate on targets that are appearing. Maybe be combined with MODE_OUT to target Visibility changes both in and out. /**
     * Mode used in {@link #setMode(int)} to make the transition
     * operate on targets that are appearing. Maybe be combined with
     * {@link #MODE_OUT} to target Visibility changes both in and out.
     */
    public static final int MODE_IN = 0x1;

    
Mode used in setMode(int) to make the transition operate on targets that are disappearing. Maybe be combined with MODE_IN to target Visibility changes both in and out. /**
     * Mode used in {@link #setMode(int)} to make the transition
     * operate on targets that are disappearing. Maybe be combined with
     * {@link #MODE_IN} to target Visibility changes both in and out.
     */
    public static final int MODE_OUT = 0x2;

    private static final String[] sTransitionProperties = {
            PROPNAME_VISIBILITY,
            PROPNAME_PARENT,
    };

    private static class VisibilityInfo {
        boolean visibilityChange;
        boolean fadeIn;
        int startVisibility;
        int endVisibility;
        ViewGroup startParent;
        ViewGroup endParent;
    }

    private int mMode = MODE_IN | MODE_OUT;
    private boolean mSuppressLayout = true;

    public Visibility() {}

    public Visibility(Context context, AttributeSet attrs) {
        super(context, attrs);
        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.VisibilityTransition);
        int mode = a.getInt(R.styleable.VisibilityTransition_transitionVisibilityMode, 0);
        a.recycle();
        if (mode != 0) {
            setMode(mode);
        }
    }

    
This tells the Visibility transition to suppress layout during the transition and release
the suppression after the transition.
@hide
/**
     * This tells the Visibility transition to suppress layout during the transition and release
     * the suppression after the transition.
     * @hide
     */
    public void setSuppressLayout(boolean suppress) {
        this.mSuppressLayout = suppress;
    }

    
Changes the transition to support appearing and/or disappearing Views, depending
on mode.
Params:
mode – The behavior supported by this transition, a combination of MODE_IN and MODE_OUT.
@attr
ref android.R.styleable#VisibilityTransition_transitionVisibilityMode/**
     * Changes the transition to support appearing and/or disappearing Views, depending
     * on <code>mode</code>.
     *
     * @param mode The behavior supported by this transition, a combination of
     *             {@link #MODE_IN} and {@link #MODE_OUT}.
     * @attr ref android.R.styleable#VisibilityTransition_transitionVisibilityMode
     */
    public void setMode(@VisibilityMode int mode) {
        if ((mode & ~(MODE_IN | MODE_OUT)) != 0) {
            throw new IllegalArgumentException("Only MODE_IN and MODE_OUT flags are allowed");
        }
        mMode = mode;
    }

    
Returns whether appearing and/or disappearing Views are supported. Returns whether appearing and/or disappearing Views are supported. A combination of MODE_IN and MODE_OUT. 
@attr
ref android.R.styleable#VisibilityTransition_transitionVisibilityMode/**
     * Returns whether appearing and/or disappearing Views are supported.
     *
     * Returns whether appearing and/or disappearing Views are supported. A combination of
     *         {@link #MODE_IN} and {@link #MODE_OUT}.
     * @attr ref android.R.styleable#VisibilityTransition_transitionVisibilityMode
     */
    @VisibilityMode
    public int getMode() {
        return mMode;
    }

    @Override
    public String[] getTransitionProperties() {
        return sTransitionProperties;
    }

    private void captureValues(TransitionValues transitionValues) {
        int visibility = transitionValues.view.getVisibility();
        transitionValues.values.put(PROPNAME_VISIBILITY, visibility);
        transitionValues.values.put(PROPNAME_PARENT, transitionValues.view.getParent());
        int[] loc = new int[2];
        transitionValues.view.getLocationOnScreen(loc);
        transitionValues.values.put(PROPNAME_SCREEN_LOCATION, loc);
    }

    @Override
    public void captureStartValues(TransitionValues transitionValues) {
        captureValues(transitionValues);
    }

    @Override
    public void captureEndValues(TransitionValues transitionValues) {
        captureValues(transitionValues);
    }

    
Returns whether the view is 'visible' according to the given values object. This is determined by testing the same properties in the values object that are used to determine whether the object is appearing or disappearing in the Transition.createAnimator(ViewGroup, TransitionValues, TransitionValues) method. This method can be called by, for example, subclasses that want to know whether the object is visible in the same way that Visibility determines it for the actual animation. 
Params:
values – The TransitionValues object that holds the information by
which visibility is determined.
Returns:
True if the view reference by values is visible,
false otherwise./**
     * Returns whether the view is 'visible' according to the given values
     * object. This is determined by testing the same properties in the values
     * object that are used to determine whether the object is appearing or
     * disappearing in the {@link
     * Transition#createAnimator(ViewGroup, TransitionValues, TransitionValues)}
     * method. This method can be called by, for example, subclasses that want
     * to know whether the object is visible in the same way that Visibility
     * determines it for the actual animation.
     *
     * @param values The TransitionValues object that holds the information by
     * which visibility is determined.
     * @return True if the view reference by <code>values</code> is visible,
     * false otherwise.
     */
    public boolean isVisible(TransitionValues values) {
        if (values == null) {
            return false;
        }
        int visibility = (Integer) values.values.get(PROPNAME_VISIBILITY);
        View parent = (View) values.values.get(PROPNAME_PARENT);

        return visibility == View.VISIBLE && parent != null;
    }

    private static VisibilityInfo getVisibilityChangeInfo(TransitionValues startValues,
            TransitionValues endValues) {
        final VisibilityInfo visInfo = new VisibilityInfo();
        visInfo.visibilityChange = false;
        visInfo.fadeIn = false;
        if (startValues != null && startValues.values.containsKey(PROPNAME_VISIBILITY)) {
            visInfo.startVisibility = (Integer) startValues.values.get(PROPNAME_VISIBILITY);
            visInfo.startParent = (ViewGroup) startValues.values.get(PROPNAME_PARENT);
        } else {
            visInfo.startVisibility = -1;
            visInfo.startParent = null;
        }
        if (endValues != null && endValues.values.containsKey(PROPNAME_VISIBILITY)) {
            visInfo.endVisibility = (Integer) endValues.values.get(PROPNAME_VISIBILITY);
            visInfo.endParent = (ViewGroup) endValues.values.get(PROPNAME_PARENT);
        } else {
            visInfo.endVisibility = -1;
            visInfo.endParent = null;
        }
        if (startValues != null && endValues != null) {
            if (visInfo.startVisibility == visInfo.endVisibility &&
                    visInfo.startParent == visInfo.endParent) {
                return visInfo;
            } else {
                if (visInfo.startVisibility != visInfo.endVisibility) {
                    if (visInfo.startVisibility == View.VISIBLE) {
                        visInfo.fadeIn = false;
                        visInfo.visibilityChange = true;
                    } else if (visInfo.endVisibility == View.VISIBLE) {
                        visInfo.fadeIn = true;
                        visInfo.visibilityChange = true;
                    }
                    // no visibilityChange if going between INVISIBLE and GONE
                } else if (visInfo.startParent != visInfo.endParent) {
                    if (visInfo.endParent == null) {
                        visInfo.fadeIn = false;
                        visInfo.visibilityChange = true;
                    } else if (visInfo.startParent == null) {
                        visInfo.fadeIn = true;
                        visInfo.visibilityChange = true;
                    }
                }
            }
        } else if (startValues == null && visInfo.endVisibility == View.VISIBLE) {
            visInfo.fadeIn = true;
            visInfo.visibilityChange = true;
        } else if (endValues == null && visInfo.startVisibility == View.VISIBLE) {
            visInfo.fadeIn = false;
            visInfo.visibilityChange = true;
        }
        return visInfo;
    }

    @Override
    public Animator createAnimator(ViewGroup sceneRoot, TransitionValues startValues,
            TransitionValues endValues) {
        VisibilityInfo visInfo = getVisibilityChangeInfo(startValues, endValues);
        if (visInfo.visibilityChange
                && (visInfo.startParent != null || visInfo.endParent != null)) {
            if (visInfo.fadeIn) {
                return onAppear(sceneRoot, startValues, visInfo.startVisibility,
                        endValues, visInfo.endVisibility);
            } else {
                return onDisappear(sceneRoot, startValues, visInfo.startVisibility,
                        endValues, visInfo.endVisibility
                );
            }
        }
        return null;
    }

    
The default implementation of this method calls onAppear(ViewGroup, View, TransitionValues, TransitionValues). Subclasses should override this method or onAppear(ViewGroup, View, TransitionValues, TransitionValues). if they need to create an Animator when targets appear. The method should only be called by the Visibility class; it is not intended to be called from external classes. 
Params:
sceneRoot – The root of the transition hierarchy
startValues – The target values in the start scene
startVisibility – The target visibility in the start scene
endValues – The target values in the end scene
endVisibility – The target visibility in the end scene
Returns:
An Animator to be started at the appropriate time in the
overall transition for this scene change. A null value means no animation
should be run./**
     * The default implementation of this method calls
     * {@link #onAppear(ViewGroup, View, TransitionValues, TransitionValues)}.
     * Subclasses should override this method or
     * {@link #onAppear(ViewGroup, View, TransitionValues, TransitionValues)}.
     * if they need to create an Animator when targets appear.
     * The method should only be called by the Visibility class; it is
     * not intended to be called from external classes.
     *
     * @param sceneRoot The root of the transition hierarchy
     * @param startValues The target values in the start scene
     * @param startVisibility The target visibility in the start scene
     * @param endValues The target values in the end scene
     * @param endVisibility The target visibility in the end scene
     * @return An Animator to be started at the appropriate time in the
     * overall transition for this scene change. A null value means no animation
     * should be run.
     */
    public Animator onAppear(ViewGroup sceneRoot,
            TransitionValues startValues, int startVisibility,
            TransitionValues endValues, int endVisibility) {
        if ((mMode & MODE_IN) != MODE_IN || endValues == null) {
            return null;
        }
        if (startValues == null) {
            VisibilityInfo parentVisibilityInfo = null;
            View endParent = (View) endValues.view.getParent();
            TransitionValues startParentValues = getMatchedTransitionValues(endParent,
                                                                            false);
            TransitionValues endParentValues = getTransitionValues(endParent, false);
            parentVisibilityInfo =
                getVisibilityChangeInfo(startParentValues, endParentValues);
            if (parentVisibilityInfo.visibilityChange) {
                return null;
            }
        }
        return onAppear(sceneRoot, endValues.view, startValues, endValues);
    }

    
The default implementation of this method returns a null Animator. Subclasses should override this method to make targets appear with the desired transition. The method should only be called from onAppear(ViewGroup, TransitionValues, int, TransitionValues, int). 
Params:
sceneRoot – The root of the transition hierarchy
view – The View to make appear. This will be in the target scene's View hierarchy and
            will be VISIBLE.
startValues – The target values in the start scene
endValues – The target values in the end scene
Returns:
An Animator to be started at the appropriate time in the
overall transition for this scene change. A null value means no animation
should be run./**
     * The default implementation of this method returns a null Animator. Subclasses should
     * override this method to make targets appear with the desired transition. The
     * method should only be called from
     * {@link #onAppear(ViewGroup, TransitionValues, int, TransitionValues, int)}.
     *
     * @param sceneRoot The root of the transition hierarchy
     * @param view The View to make appear. This will be in the target scene's View hierarchy and
     *             will be VISIBLE.
     * @param startValues The target values in the start scene
     * @param endValues The target values in the end scene
     * @return An Animator to be started at the appropriate time in the
     * overall transition for this scene change. A null value means no animation
     * should be run.
     */
    public Animator onAppear(ViewGroup sceneRoot, View view, TransitionValues startValues,
            TransitionValues endValues) {
        return null;
    }

    
Subclasses should override this method or onDisappear(ViewGroup, View, TransitionValues, TransitionValues) if they need to create an Animator when targets disappear. The method should only be called by the Visibility class; it is not intended to be called from external classes. 
 The default implementation of this method attempts to find a View to use to call onDisappear(ViewGroup, View, TransitionValues, TransitionValues), based on the situation of the View in the View hierarchy. For example, if a View was simply removed from its parent, then the View will be added into a ViewGroupOverlay and passed as the view parameter in onDisappear(ViewGroup, View, TransitionValues, TransitionValues). If a visible View is changed to be View.GONE or View.INVISIBLE, then it can be used as the view and the visibility will be changed to View.VISIBLE for the duration of the animation. However, if a View is in a hierarchy which is also altering its visibility, the situation can be more complicated. In general, if a view that is no longer in the hierarchy in the end scene still has a parent (so its parent hierarchy was removed, but it was not removed from its parent), then it will be left alone to avoid side-effects from improperly removing it from its parent. The only exception to this is if the previous Scene was created from a layout resource file, then it is considered safe to un-parent the starting scene view in order to make it disappear.
Params:
sceneRoot – The root of the transition hierarchy
startValues – The target values in the start scene
startVisibility – The target visibility in the start scene
endValues – The target values in the end scene
endVisibility – The target visibility in the end scene
Returns:
An Animator to be started at the appropriate time in the
overall transition for this scene change. A null value means no animation
should be run./**
     * Subclasses should override this method or
     * {@link #onDisappear(ViewGroup, View, TransitionValues, TransitionValues)}
     * if they need to create an Animator when targets disappear.
     * The method should only be called by the Visibility class; it is
     * not intended to be called from external classes.
     * <p>
     * The default implementation of this method attempts to find a View to use to call
     * {@link #onDisappear(ViewGroup, View, TransitionValues, TransitionValues)},
     * based on the situation of the View in the View hierarchy. For example,
     * if a View was simply removed from its parent, then the View will be added
     * into a {@link android.view.ViewGroupOverlay} and passed as the <code>view</code>
     * parameter in {@link #onDisappear(ViewGroup, View, TransitionValues, TransitionValues)}.
     * If a visible View is changed to be {@link View#GONE} or {@link View#INVISIBLE},
     * then it can be used as the <code>view</code> and the visibility will be changed
     * to {@link View#VISIBLE} for the duration of the animation. However, if a View
     * is in a hierarchy which is also altering its visibility, the situation can be
     * more complicated. In general, if a view that is no longer in the hierarchy in
     * the end scene still has a parent (so its parent hierarchy was removed, but it
     * was not removed from its parent), then it will be left alone to avoid side-effects from
     * improperly removing it from its parent. The only exception to this is if
     * the previous {@link Scene} was {@link Scene#getSceneForLayout(ViewGroup, int,
     * android.content.Context) created from a layout resource file}, then it is considered
     * safe to un-parent the starting scene view in order to make it disappear.</p>
     *
     * @param sceneRoot The root of the transition hierarchy
     * @param startValues The target values in the start scene
     * @param startVisibility The target visibility in the start scene
     * @param endValues The target values in the end scene
     * @param endVisibility The target visibility in the end scene
     * @return An Animator to be started at the appropriate time in the
     * overall transition for this scene change. A null value means no animation
     * should be run.
     */
    public Animator onDisappear(ViewGroup sceneRoot,
            TransitionValues startValues, int startVisibility,
            TransitionValues endValues, int endVisibility) {
        if ((mMode & MODE_OUT) != MODE_OUT) {
            return null;
        }

        View startView = (startValues != null) ? startValues.view : null;
        View endView = (endValues != null) ? endValues.view : null;
        View overlayView = null;
        View viewToKeep = null;
        if (endView == null || endView.getParent() == null) {
            if (endView != null) {
                // endView was removed from its parent - add it to the overlay
                overlayView = endView;
            } else if (startView != null) {
                // endView does not exist. Use startView only under certain
                // conditions, because placing a view in an overlay necessitates
                // it being removed from its current parent
                if (startView.getParent() == null) {
                    // no parent - safe to use
                    overlayView = startView;
                } else if (startView.getParent() instanceof View) {
                    View startParent = (View) startView.getParent();
                    TransitionValues startParentValues = getTransitionValues(startParent, true);
                    TransitionValues endParentValues = getMatchedTransitionValues(startParent,
                            true);
                    VisibilityInfo parentVisibilityInfo =
                            getVisibilityChangeInfo(startParentValues, endParentValues);
                    if (!parentVisibilityInfo.visibilityChange) {
                        overlayView = TransitionUtils.copyViewImage(sceneRoot, startView,
                                startParent);
                    } else if (startParent.getParent() == null) {
                        int id = startParent.getId();
                        if (id != View.NO_ID && sceneRoot.findViewById(id) != null
                                && mCanRemoveViews) {
                            // no parent, but its parent is unparented  but the parent
                            // hierarchy has been replaced by a new hierarchy with the same id
                            // and it is safe to un-parent startView
                            overlayView = startView;
                        }
                    }
                }
            }
        } else {
            // visibility change
            if (endVisibility == View.INVISIBLE) {
                viewToKeep = endView;
            } else {
                // Becoming GONE
                if (startView == endView) {
                    viewToKeep = endView;
                } else if (mCanRemoveViews) {
                    overlayView = startView;
                } else {
                    overlayView = TransitionUtils.copyViewImage(sceneRoot, startView,
                            (View) startView.getParent());
                }
            }
        }
        final int finalVisibility = endVisibility;
        final ViewGroup finalSceneRoot = sceneRoot;

        if (overlayView != null) {
            // TODO: Need to do this for general case of adding to overlay
            int[] screenLoc = (int[]) startValues.values.get(PROPNAME_SCREEN_LOCATION);
            int screenX = screenLoc[0];
            int screenY = screenLoc[1];
            int[] loc = new int[2];
            sceneRoot.getLocationOnScreen(loc);
            overlayView.offsetLeftAndRight((screenX - loc[0]) - overlayView.getLeft());
            overlayView.offsetTopAndBottom((screenY - loc[1]) - overlayView.getTop());
            sceneRoot.getOverlay().add(overlayView);
            Animator animator = onDisappear(sceneRoot, overlayView, startValues, endValues);
            if (animator == null) {
                sceneRoot.getOverlay().remove(overlayView);
            } else {
                final View finalOverlayView = overlayView;
                addListener(new TransitionListenerAdapter() {
                    @Override
                    public void onTransitionEnd(Transition transition) {
                        finalSceneRoot.getOverlay().remove(finalOverlayView);
                        transition.removeListener(this);
                    }
                });
            }
            return animator;
        }

        if (viewToKeep != null) {
            int originalVisibility = viewToKeep.getVisibility();
            viewToKeep.setTransitionVisibility(View.VISIBLE);
            Animator animator = onDisappear(sceneRoot, viewToKeep, startValues, endValues);
            if (animator != null) {
                DisappearListener disappearListener = new DisappearListener(viewToKeep,
                        finalVisibility, mSuppressLayout);
                animator.addListener(disappearListener);
                animator.addPauseListener(disappearListener);
                addListener(disappearListener);
            } else {
                viewToKeep.setTransitionVisibility(originalVisibility);
            }
            return animator;
        }
        return null;
    }

    @Override
    public boolean isTransitionRequired(TransitionValues startValues, TransitionValues newValues) {
        if (startValues == null && newValues == null) {
            return false;
        }
        if (startValues != null && newValues != null &&
                newValues.values.containsKey(PROPNAME_VISIBILITY) !=
                        startValues.values.containsKey(PROPNAME_VISIBILITY)) {
            // The transition wasn't targeted in either the start or end, so it couldn't
            // have changed.
            return false;
        }
        VisibilityInfo changeInfo = getVisibilityChangeInfo(startValues, newValues);
        return changeInfo.visibilityChange && (changeInfo.startVisibility == View.VISIBLE ||
                changeInfo.endVisibility == View.VISIBLE);
    }

    
The default implementation of this method returns a null Animator. Subclasses should override this method to make targets disappear with the desired transition. The method should only be called from onDisappear(ViewGroup, TransitionValues, int, TransitionValues, int). 
Params:
sceneRoot – The root of the transition hierarchy
view – The View to make disappear. This will be in the target scene's View hierarchy or in an ViewGroupOverlay and will be VISIBLE.
startValues – The target values in the start scene
endValues – The target values in the end scene
Returns:
An Animator to be started at the appropriate time in the
overall transition for this scene change. A null value means no animation
should be run./**
     * The default implementation of this method returns a null Animator. Subclasses should
     * override this method to make targets disappear with the desired transition. The
     * method should only be called from
     * {@link #onDisappear(ViewGroup, TransitionValues, int, TransitionValues, int)}.
     *
     * @param sceneRoot The root of the transition hierarchy
     * @param view The View to make disappear. This will be in the target scene's View
     *             hierarchy or in an {@link android.view.ViewGroupOverlay} and will be
     *             VISIBLE.
     * @param startValues The target values in the start scene
     * @param endValues The target values in the end scene
     * @return An Animator to be started at the appropriate time in the
     * overall transition for this scene change. A null value means no animation
     * should be run.
     */
    public Animator onDisappear(ViewGroup sceneRoot, View view, TransitionValues startValues,
            TransitionValues endValues) {
        return null;
    }

    private static class DisappearListener
            extends TransitionListenerAdapter implements AnimatorListener, AnimatorPauseListener {
        private final View mView;
        private final int mFinalVisibility;
        private final ViewGroup mParent;
        private final boolean mSuppressLayout;

        private boolean mLayoutSuppressed;
        boolean mCanceled = false;

        public DisappearListener(View view, int finalVisibility, boolean suppressLayout) {
            this.mView = view;
            this.mFinalVisibility = finalVisibility;
            this.mParent = (ViewGroup) view.getParent();
            this.mSuppressLayout = suppressLayout;
            // Prevent a layout from including mView in its calculation.
            suppressLayout(true);
        }

        @Override
        public void onAnimationPause(Animator animation) {
            if (!mCanceled) {
                mView.setTransitionVisibility(mFinalVisibility);
            }
        }

        @Override
        public void onAnimationResume(Animator animation) {
            if (!mCanceled) {
                mView.setTransitionVisibility(View.VISIBLE);
            }
        }

        @Override
        public void onAnimationCancel(Animator animation) {
            mCanceled = true;
        }

        @Override
        public void onAnimationRepeat(Animator animation) {
        }

        @Override
        public void onAnimationStart(Animator animation) {
        }

        @Override
        public void onAnimationEnd(Animator animation) {
            hideViewWhenNotCanceled();
        }

        @Override
        public void onTransitionEnd(Transition transition) {
            hideViewWhenNotCanceled();
            transition.removeListener(this);
        }

        @Override
        public void onTransitionPause(Transition transition) {
            suppressLayout(false);
        }

        @Override
        public void onTransitionResume(Transition transition) {
            suppressLayout(true);
        }

        private void hideViewWhenNotCanceled() {
            if (!mCanceled) {
                // Recreate the parent's display list in case it includes mView.
                mView.setTransitionVisibility(mFinalVisibility);
                if (mParent != null) {
                    mParent.invalidate();
                }
            }
            // Layout is allowed now that the View is in its final state
            suppressLayout(false);
        }

        private void suppressLayout(boolean suppress) {
            if (mSuppressLayout && mLayoutSuppressed != suppress && mParent != null) {
                mLayoutSuppressed = suppress;
                mParent.suppressLayout(suppress);
            }
        }
    }
}