src/com/android/messaging/ui/SnackBarManager.java - platform/packages/apps/Messaging - Git at Google

 /*
  * Copyright (C) 2015 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 com.android.messaging.ui;

 import android.content.Context;
 import android.graphics.Point;
 import android.graphics.Rect;
 import android.os.Handler;
 import android.text.TextUtils;
 import android.util.DisplayMetrics;
 import android.view.Gravity;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.View.MeasureSpec;
 import android.view.View.OnTouchListener;
 import android.view.ViewGroup;
 import android.view.ViewGroup.LayoutParams;
 import android.view.ViewPropertyAnimator;
 import android.view.ViewTreeObserver.OnGlobalLayoutListener;
 import android.view.WindowManager;
 import android.widget.PopupWindow;
 import android.widget.PopupWindow.OnDismissListener;

 import com.android.messaging.Factory;
 import com.android.messaging.R;
 import com.android.messaging.ui.SnackBar.Placement;
 import com.android.messaging.ui.SnackBar.SnackBarListener;
 import com.android.messaging.util.AccessibilityUtil;
 import com.android.messaging.util.Assert;
 import com.android.messaging.util.LogUtil;
 import com.android.messaging.util.OsUtil;
 import com.android.messaging.util.TextUtil;
 import com.android.messaging.util.UiUtils;
 import com.google.common.base.Joiner;

 import java.util.List;

 public class SnackBarManager {

     private static SnackBarManager sInstance;

     public static SnackBarManager get() {
         if (sInstance == null) {
             synchronized (SnackBarManager.class) {
                 if (sInstance == null) {
                     sInstance = new SnackBarManager();
                 }
             }
         }
         return sInstance;
     }

     private final Runnable mDismissRunnable = new Runnable() {
         @Override
         public void run() {
             dismiss();
         }
     };

     private final OnTouchListener mDismissOnTouchListener = new OnTouchListener() {
         @Override
         public boolean onTouch(final View view, final MotionEvent event) {
             // Dismiss the {@link SnackBar} but don't consume the event.
             dismiss();
             return false;
         }
     };

     private final SnackBarListener mDismissOnUserTapListener = new SnackBarListener() {
         @Override
         public void onActionClick() {
             dismiss();
         }
     };

     private final int mTranslationDurationMs;
     private final Handler mHideHandler;

     private SnackBar mCurrentSnackBar;
     private SnackBar mLatestSnackBar;
     private SnackBar mNextSnackBar;
     private boolean mIsCurrentlyDismissing;
     private PopupWindow mPopupWindow;

     private SnackBarManager() {
         mTranslationDurationMs = Factory.get().getApplicationContext().getResources().getInteger(
                 R.integer.snackbar_translation_duration_ms);
         mHideHandler = new Handler();
     }

     public SnackBar getLatestSnackBar() {
         return mLatestSnackBar;
     }

     public SnackBar.Builder newBuilder(final View parentView) {
         return new SnackBar.Builder(this, parentView);
     }

     /**
      * The given snackBar is not guaranteed to be shown. If the previous snackBar is animating away,
      * and another snackBar is requested to show after this one, this snackBar will be skipped.
      */
     public void show(final SnackBar snackBar) {
         Assert.notNull(snackBar);

         if (mCurrentSnackBar != null) {
             LogUtil.d(LogUtil.BUGLE_TAG, "Showing snack bar, but currentSnackBar was not null.");

             // Dismiss the current snack bar. That will cause the next snack bar to be shown on
             // completion.
             mNextSnackBar = snackBar;
             mLatestSnackBar = snackBar;
             dismiss();
             return;
         }

         mCurrentSnackBar = snackBar;
         mLatestSnackBar = snackBar;

         // We want to know when either button was tapped so we can dismiss.
         snackBar.setListener(mDismissOnUserTapListener);

         // Cancel previous dismisses & set dismiss for the delay time.
         mHideHandler.removeCallbacks(mDismissRunnable);
         mHideHandler.postDelayed(mDismissRunnable, snackBar.getDuration());

         snackBar.setEnabled(false);

         // For some reason, the addView function does not respect layoutParams.
         // We need to explicitly set it first here.
         final View rootView = snackBar.getRootView();

         if (LogUtil.isLoggable(LogUtil.BUGLE_TAG, LogUtil.DEBUG)) {
             LogUtil.d(LogUtil.BUGLE_TAG, "Showing snack bar: " + snackBar);
         }
         // Measure the snack bar root view so we know how much to translate by.
         measureSnackBar(snackBar);
         mPopupWindow = new PopupWindow(snackBar.getContext());
         mPopupWindow.setWidth(LayoutParams.MATCH_PARENT);
         mPopupWindow.setHeight(LayoutParams.WRAP_CONTENT);
         mPopupWindow.setBackgroundDrawable(null);
         mPopupWindow.setContentView(rootView);
         final Placement placement = snackBar.getPlacement();
         if (placement == null) {
             mPopupWindow.showAtLocation(
                     snackBar.getParentView(), Gravity.BOTTOM | Gravity.START,
                     0, getScreenBottomOffset(snackBar));
         } else {
             final View anchorView = placement.getAnchorView();

             // You'd expect PopupWindow.showAsDropDown to ensure the popup moves with the anchor
             // view, which it does for scrolling, but not layout changes, so we have to manually
             // update while the snackbar is showing
             final OnGlobalLayoutListener listener = new OnGlobalLayoutListener() {
                 @Override
                 public void onGlobalLayout() {
                     mPopupWindow.update(anchorView, 0, getRelativeOffset(snackBar),
                             anchorView.getWidth(), LayoutParams.WRAP_CONTENT);
                 }
             };
             anchorView.getViewTreeObserver().addOnGlobalLayoutListener(listener);
             mPopupWindow.setOnDismissListener(new OnDismissListener() {
                 @Override
                 public void onDismiss() {
                     anchorView.getViewTreeObserver().removeOnGlobalLayoutListener(listener);
                 }
             });
             mPopupWindow.showAsDropDown(anchorView, 0, getRelativeOffset(snackBar));
         }


         // Animate the toast bar into view.
         placeSnackBarOffScreen(snackBar);
         animateSnackBarOnScreen(snackBar).withEndAction(new Runnable() {
             @Override
             public void run() {
                 mCurrentSnackBar.setEnabled(true);
                 makeCurrentSnackBarDismissibleOnTouch();
                 // Fire an accessibility event as needed
                 String snackBarText = snackBar.getMessageText();
                 if (!TextUtils.isEmpty(snackBarText) &&
                         TextUtils.getTrimmedLength(snackBarText) > 0) {
                     snackBarText = snackBarText.trim();
                     final String snackBarActionText = snackBar.getActionLabel();
                     if (!TextUtil.isAllWhitespace(snackBarActionText)) {
                         snackBarText = Joiner.on(", ").join(snackBarText, snackBarActionText);
                     }
                     AccessibilityUtil.announceForAccessibilityCompat(snackBar.getSnackBarView(),
                             null /*accessibilityManager*/, snackBarText);
                 }
             }
         });

         // Animate any interaction views out of the way.
         animateInteractionsOnShow(snackBar);
     }

     /**
      * Dismisses the current toast that is showing. If there is a toast waiting to be shown, that
      * toast will be shown when the current one has been dismissed.
      */
     public void dismiss() {
         mHideHandler.removeCallbacks(mDismissRunnable);

         if (mCurrentSnackBar == null || mIsCurrentlyDismissing) {
             return;
         }

         final SnackBar snackBar = mCurrentSnackBar;

         LogUtil.d(LogUtil.BUGLE_TAG, "Dismissing snack bar.");
         mIsCurrentlyDismissing = true;

         snackBar.setEnabled(false);

         // Animate the toast bar down.
         final View rootView = snackBar.getRootView();
         animateSnackBarOffScreen(snackBar).withEndAction(new Runnable() {
             @Override
             public void run() {
                 rootView.setVisibility(View.GONE);
                 try {
                     mPopupWindow.dismiss();
                 } catch (IllegalArgumentException e) {
                     // PopupWindow.dismiss() will fire an IllegalArgumentException if the activity
                     // has already ended while we were animating
                 }

                 mCurrentSnackBar = null;
                 mIsCurrentlyDismissing = false;

                 // Show the next toast if one is waiting.
                 if (mNextSnackBar != null) {
                     final SnackBar localNextSnackBar = mNextSnackBar;
                     mNextSnackBar = null;
                     show(localNextSnackBar);
                 }
             }
         });

         // Animate any interaction views back.
         animateInteractionsOnDismiss(snackBar);
     }

     private void makeCurrentSnackBarDismissibleOnTouch() {
         // Set touching on the entire view, the {@link SnackBar} itself, as
         // well as the button's dismiss the toast.
         mCurrentSnackBar.getRootView().setOnTouchListener(mDismissOnTouchListener);
         mCurrentSnackBar.getSnackBarView().setOnTouchListener(mDismissOnTouchListener);
     }

     private void measureSnackBar(final SnackBar snackBar) {
         final View rootView = snackBar.getRootView();
         final Point displaySize = new Point();
         getWindowManager(snackBar.getContext()).getDefaultDisplay().getSize(displaySize);
         final int widthSpec = ViewGroup.getChildMeasureSpec(
                 MeasureSpec.makeMeasureSpec(displaySize.x, MeasureSpec.EXACTLY),
                 0, LayoutParams.MATCH_PARENT);
         final int heightSpec = ViewGroup.getChildMeasureSpec(
                 MeasureSpec.makeMeasureSpec(displaySize.y, MeasureSpec.EXACTLY),
                 0, LayoutParams.WRAP_CONTENT);
         rootView.measure(widthSpec, heightSpec);
     }

     private void placeSnackBarOffScreen(final SnackBar snackBar) {
         final View rootView = snackBar.getRootView();
         final View snackBarView = snackBar.getSnackBarView();
         snackBarView.setTranslationY(rootView.getMeasuredHeight());
     }

     private ViewPropertyAnimator animateSnackBarOnScreen(final SnackBar snackBar) {
         final View snackBarView = snackBar.getSnackBarView();
         return normalizeAnimator(snackBarView.animate()).translationX(0).translationY(0);
     }

     private ViewPropertyAnimator animateSnackBarOffScreen(final SnackBar snackBar) {
         final View rootView = snackBar.getRootView();
         final View snackBarView = snackBar.getSnackBarView();
         return normalizeAnimator(snackBarView.animate()).translationY(rootView.getHeight());
     }

     private void animateInteractionsOnShow(final SnackBar snackBar) {
         final List<SnackBarInteraction> interactions = snackBar.getInteractions();
         for (final SnackBarInteraction interaction : interactions) {
             if (interaction != null) {
                 final ViewPropertyAnimator animator = interaction.animateOnSnackBarShow(snackBar);
                 if (animator != null) {
                     normalizeAnimator(animator);
                 }
             }
         }
     }

     private void animateInteractionsOnDismiss(final SnackBar snackBar) {
         final List<SnackBarInteraction> interactions = snackBar.getInteractions();
         for (final SnackBarInteraction interaction : interactions) {
             if (interaction != null) {
                 final ViewPropertyAnimator animator =
                         interaction.animateOnSnackBarDismiss(snackBar);
                 if (animator != null) {
                     normalizeAnimator(animator);
                 }
             }
         }
     }

     private ViewPropertyAnimator normalizeAnimator(final ViewPropertyAnimator animator) {
         return animator
                 .setInterpolator(UiUtils.DEFAULT_INTERPOLATOR)
                 .setDuration(mTranslationDurationMs);
     }

     private WindowManager getWindowManager(final Context context) {
         return (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
     }

     /**
      * Get the offset from the bottom of the screen where the snack bar should be placed.
      */
     private int getScreenBottomOffset(final SnackBar snackBar) {
         final WindowManager windowManager = getWindowManager(snackBar.getContext());
         final DisplayMetrics displayMetrics = new DisplayMetrics();
         if (OsUtil.isAtLeastL()) {
             windowManager.getDefaultDisplay().getRealMetrics(displayMetrics);
         } else {
             windowManager.getDefaultDisplay().getMetrics(displayMetrics);
         }
         final int screenHeight = displayMetrics.heightPixels;

         if (OsUtil.isAtLeastL()) {
             // In L, the navigation bar is included in the space for the popup window, so we have to
             // offset by the size of the navigation bar
             final Rect displayRect = new Rect();
             snackBar.getParentView().getRootView().getWindowVisibleDisplayFrame(displayRect);
             return screenHeight - displayRect.bottom;
         }

         return 0;
     }

     private int getRelativeOffset(final SnackBar snackBar) {
         final Placement placement = snackBar.getPlacement();
         Assert.notNull(placement);
         final View anchorView = placement.getAnchorView();
         if (placement.getAnchorAbove()) {
             return -snackBar.getRootView().getMeasuredHeight() - anchorView.getHeight();
         } else {
             // Use the default dropdown positioning
             return 0;
         }
     }
 }
	/*
	* Copyright (C) 2015 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 com.android.messaging.ui;

	import android.content.Context;
	import android.graphics.Point;
	import android.graphics.Rect;
	import android.os.Handler;
	import android.text.TextUtils;
	import android.util.DisplayMetrics;
	import android.view.Gravity;
	import android.view.MotionEvent;
	import android.view.View;
	import android.view.View.MeasureSpec;
	import android.view.View.OnTouchListener;
	import android.view.ViewGroup;
	import android.view.ViewGroup.LayoutParams;
	import android.view.ViewPropertyAnimator;
	import android.view.ViewTreeObserver.OnGlobalLayoutListener;
	import android.view.WindowManager;
	import android.widget.PopupWindow;
	import android.widget.PopupWindow.OnDismissListener;

	import com.android.messaging.Factory;
	import com.android.messaging.R;
	import com.android.messaging.ui.SnackBar.Placement;
	import com.android.messaging.ui.SnackBar.SnackBarListener;
	import com.android.messaging.util.AccessibilityUtil;
	import com.android.messaging.util.Assert;
	import com.android.messaging.util.LogUtil;
	import com.android.messaging.util.OsUtil;
	import com.android.messaging.util.TextUtil;
	import com.android.messaging.util.UiUtils;
	import com.google.common.base.Joiner;

	import java.util.List;

	public class SnackBarManager {

	private static SnackBarManager sInstance;

	public static SnackBarManager get() {
	if (sInstance == null) {
	synchronized (SnackBarManager.class) {
	if (sInstance == null) {
	sInstance = new SnackBarManager();
	}
	}
	}
	return sInstance;
	}

	private final Runnable mDismissRunnable = new Runnable() {
	@Override
	public void run() {
	dismiss();
	}
	};

	private final OnTouchListener mDismissOnTouchListener = new OnTouchListener() {
	@Override
	public boolean onTouch(final View view, final MotionEvent event) {
	// Dismiss the {@link SnackBar} but don't consume the event.
	dismiss();
	return false;
	}
	};

	private final SnackBarListener mDismissOnUserTapListener = new SnackBarListener() {
	@Override
	public void onActionClick() {
	dismiss();
	}
	};

	private final int mTranslationDurationMs;
	private final Handler mHideHandler;

	private SnackBar mCurrentSnackBar;
	private SnackBar mLatestSnackBar;
	private SnackBar mNextSnackBar;
	private boolean mIsCurrentlyDismissing;
	private PopupWindow mPopupWindow;

	private SnackBarManager() {
	mTranslationDurationMs = Factory.get().getApplicationContext().getResources().getInteger(
	R.integer.snackbar_translation_duration_ms);
	mHideHandler = new Handler();
	}

	public SnackBar getLatestSnackBar() {
	return mLatestSnackBar;
	}

	public SnackBar.Builder newBuilder(final View parentView) {
	return new SnackBar.Builder(this, parentView);
	}

	/**
	* The given snackBar is not guaranteed to be shown. If the previous snackBar is animating away,
	* and another snackBar is requested to show after this one, this snackBar will be skipped.
	*/
	public void show(final SnackBar snackBar) {
	Assert.notNull(snackBar);

	if (mCurrentSnackBar != null) {
	LogUtil.d(LogUtil.BUGLE_TAG, "Showing snack bar, but currentSnackBar was not null.");

	// Dismiss the current snack bar. That will cause the next snack bar to be shown on
	// completion.
	mNextSnackBar = snackBar;
	mLatestSnackBar = snackBar;
	dismiss();
	return;
	}

	mCurrentSnackBar = snackBar;
	mLatestSnackBar = snackBar;

	// We want to know when either button was tapped so we can dismiss.
	snackBar.setListener(mDismissOnUserTapListener);

	// Cancel previous dismisses & set dismiss for the delay time.
	mHideHandler.removeCallbacks(mDismissRunnable);
	mHideHandler.postDelayed(mDismissRunnable, snackBar.getDuration());

	snackBar.setEnabled(false);

	// For some reason, the addView function does not respect layoutParams.
	// We need to explicitly set it first here.
	final View rootView = snackBar.getRootView();

	if (LogUtil.isLoggable(LogUtil.BUGLE_TAG, LogUtil.DEBUG)) {
	LogUtil.d(LogUtil.BUGLE_TAG, "Showing snack bar: " + snackBar);
	}
	// Measure the snack bar root view so we know how much to translate by.
	measureSnackBar(snackBar);
	mPopupWindow = new PopupWindow(snackBar.getContext());
	mPopupWindow.setWidth(LayoutParams.MATCH_PARENT);
	mPopupWindow.setHeight(LayoutParams.WRAP_CONTENT);
	mPopupWindow.setBackgroundDrawable(null);
	mPopupWindow.setContentView(rootView);
	final Placement placement = snackBar.getPlacement();
	if (placement == null) {
	mPopupWindow.showAtLocation(
	snackBar.getParentView(), Gravity.BOTTOM \| Gravity.START,
	0, getScreenBottomOffset(snackBar));
	} else {
	final View anchorView = placement.getAnchorView();

	// You'd expect PopupWindow.showAsDropDown to ensure the popup moves with the anchor
	// view, which it does for scrolling, but not layout changes, so we have to manually
	// update while the snackbar is showing
	final OnGlobalLayoutListener listener = new OnGlobalLayoutListener() {
	@Override
	public void onGlobalLayout() {
	mPopupWindow.update(anchorView, 0, getRelativeOffset(snackBar),
	anchorView.getWidth(), LayoutParams.WRAP_CONTENT);
	}
	};
	anchorView.getViewTreeObserver().addOnGlobalLayoutListener(listener);
	mPopupWindow.setOnDismissListener(new OnDismissListener() {
	@Override
	public void onDismiss() {
	anchorView.getViewTreeObserver().removeOnGlobalLayoutListener(listener);
	}
	});
	mPopupWindow.showAsDropDown(anchorView, 0, getRelativeOffset(snackBar));
	}


	// Animate the toast bar into view.
	placeSnackBarOffScreen(snackBar);
	animateSnackBarOnScreen(snackBar).withEndAction(new Runnable() {
	@Override
	public void run() {
	mCurrentSnackBar.setEnabled(true);
	makeCurrentSnackBarDismissibleOnTouch();
	// Fire an accessibility event as needed
	String snackBarText = snackBar.getMessageText();
	if (!TextUtils.isEmpty(snackBarText) &&
	TextUtils.getTrimmedLength(snackBarText) > 0) {
	snackBarText = snackBarText.trim();
	final String snackBarActionText = snackBar.getActionLabel();
	if (!TextUtil.isAllWhitespace(snackBarActionText)) {
	snackBarText = Joiner.on(", ").join(snackBarText, snackBarActionText);
	}
	AccessibilityUtil.announceForAccessibilityCompat(snackBar.getSnackBarView(),
	null /accessibilityManager/, snackBarText);
	}
	}
	});

	// Animate any interaction views out of the way.
	animateInteractionsOnShow(snackBar);
	}

	/**
	* Dismisses the current toast that is showing. If there is a toast waiting to be shown, that
	* toast will be shown when the current one has been dismissed.
	*/
	public void dismiss() {
	mHideHandler.removeCallbacks(mDismissRunnable);

	if (mCurrentSnackBar == null \|\| mIsCurrentlyDismissing) {
	return;
	}

	final SnackBar snackBar = mCurrentSnackBar;

	LogUtil.d(LogUtil.BUGLE_TAG, "Dismissing snack bar.");
	mIsCurrentlyDismissing = true;

	snackBar.setEnabled(false);

	// Animate the toast bar down.
	final View rootView = snackBar.getRootView();
	animateSnackBarOffScreen(snackBar).withEndAction(new Runnable() {
	@Override
	public void run() {
	rootView.setVisibility(View.GONE);
	try {
	mPopupWindow.dismiss();
	} catch (IllegalArgumentException e) {
	// PopupWindow.dismiss() will fire an IllegalArgumentException if the activity
	// has already ended while we were animating
	}

	mCurrentSnackBar = null;
	mIsCurrentlyDismissing = false;

	// Show the next toast if one is waiting.
	if (mNextSnackBar != null) {
	final SnackBar localNextSnackBar = mNextSnackBar;
	mNextSnackBar = null;
	show(localNextSnackBar);
	}
	}
	});

	// Animate any interaction views back.
	animateInteractionsOnDismiss(snackBar);
	}

	private void makeCurrentSnackBarDismissibleOnTouch() {
	// Set touching on the entire view, the {@link SnackBar} itself, as
	// well as the button's dismiss the toast.
	mCurrentSnackBar.getRootView().setOnTouchListener(mDismissOnTouchListener);
	mCurrentSnackBar.getSnackBarView().setOnTouchListener(mDismissOnTouchListener);
	}

	private void measureSnackBar(final SnackBar snackBar) {
	final View rootView = snackBar.getRootView();
	final Point displaySize = new Point();
	getWindowManager(snackBar.getContext()).getDefaultDisplay().getSize(displaySize);
	final int widthSpec = ViewGroup.getChildMeasureSpec(
	MeasureSpec.makeMeasureSpec(displaySize.x, MeasureSpec.EXACTLY),
	0, LayoutParams.MATCH_PARENT);
	final int heightSpec = ViewGroup.getChildMeasureSpec(
	MeasureSpec.makeMeasureSpec(displaySize.y, MeasureSpec.EXACTLY),
	0, LayoutParams.WRAP_CONTENT);
	rootView.measure(widthSpec, heightSpec);
	}

	private void placeSnackBarOffScreen(final SnackBar snackBar) {
	final View rootView = snackBar.getRootView();
	final View snackBarView = snackBar.getSnackBarView();
	snackBarView.setTranslationY(rootView.getMeasuredHeight());
	}

	private ViewPropertyAnimator animateSnackBarOnScreen(final SnackBar snackBar) {
	final View snackBarView = snackBar.getSnackBarView();
	return normalizeAnimator(snackBarView.animate()).translationX(0).translationY(0);
	}

	private ViewPropertyAnimator animateSnackBarOffScreen(final SnackBar snackBar) {
	final View rootView = snackBar.getRootView();
	final View snackBarView = snackBar.getSnackBarView();
	return normalizeAnimator(snackBarView.animate()).translationY(rootView.getHeight());
	}

	private void animateInteractionsOnShow(final SnackBar snackBar) {
	final List<SnackBarInteraction> interactions = snackBar.getInteractions();
	for (final SnackBarInteraction interaction : interactions) {
	if (interaction != null) {
	final ViewPropertyAnimator animator = interaction.animateOnSnackBarShow(snackBar);
	if (animator != null) {
	normalizeAnimator(animator);
	}
	}
	}
	}

	private void animateInteractionsOnDismiss(final SnackBar snackBar) {
	final List<SnackBarInteraction> interactions = snackBar.getInteractions();
	for (final SnackBarInteraction interaction : interactions) {
	if (interaction != null) {
	final ViewPropertyAnimator animator =
	interaction.animateOnSnackBarDismiss(snackBar);
	if (animator != null) {
	normalizeAnimator(animator);
	}
	}
	}
	}

	private ViewPropertyAnimator normalizeAnimator(final ViewPropertyAnimator animator) {
	return animator
	.setInterpolator(UiUtils.DEFAULT_INTERPOLATOR)
	.setDuration(mTranslationDurationMs);
	}

	private WindowManager getWindowManager(final Context context) {
	return (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
	}

	/**
	* Get the offset from the bottom of the screen where the snack bar should be placed.
	*/
	private int getScreenBottomOffset(final SnackBar snackBar) {
	final WindowManager windowManager = getWindowManager(snackBar.getContext());
	final DisplayMetrics displayMetrics = new DisplayMetrics();
	if (OsUtil.isAtLeastL()) {
	windowManager.getDefaultDisplay().getRealMetrics(displayMetrics);
	} else {
	windowManager.getDefaultDisplay().getMetrics(displayMetrics);
	}
	final int screenHeight = displayMetrics.heightPixels;

	if (OsUtil.isAtLeastL()) {
	// In L, the navigation bar is included in the space for the popup window, so we have to
	// offset by the size of the navigation bar
	final Rect displayRect = new Rect();
	snackBar.getParentView().getRootView().getWindowVisibleDisplayFrame(displayRect);
	return screenHeight - displayRect.bottom;
	}

	return 0;
	}

	private int getRelativeOffset(final SnackBar snackBar) {
	final Placement placement = snackBar.getPlacement();
	Assert.notNull(placement);
	final View anchorView = placement.getAnchorView();
	if (placement.getAnchorAbove()) {
	return -snackBar.getRootView().getMeasuredHeight() - anchorView.getHeight();
	} else {
	// Use the default dropdown positioning
	return 0;
	}
	}
	}