packages/SystemUI/src/com/android/systemui/keyguard/KeyguardIndicationRotateTextViewController.java - platform/frameworks/base - Git at Google

 /*
  * Copyright (C) 2021 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.systemui.keyguard;

 import android.annotation.Nullable;
 import android.content.res.ColorStateList;
 import android.graphics.Color;
 import android.os.SystemClock;
 import android.text.TextUtils;

 import androidx.annotation.IntDef;

 import com.android.systemui.Dumpable;
 import com.android.systemui.dagger.qualifiers.Main;
 import com.android.systemui.plugins.statusbar.StatusBarStateController;
 import com.android.systemui.statusbar.phone.KeyguardIndicationTextView;
 import com.android.systemui.util.ViewController;
 import com.android.systemui.util.concurrency.DelayableExecutor;

 import java.io.FileDescriptor;
 import java.io.PrintWriter;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.util.HashMap;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;

 /**
  * Animates through messages to show on the keyguard bottom area on the lock screen.
  * Utilizes a {@link KeyguardIndicationTextView} for animations. This class handles the rotating
  * nature of the messages including:
  *  - ensuring a message is shown for its minimum amount of time. Minimum time is determined by
  *  {@link KeyguardIndication#getMinVisibilityMillis()}
  *  - showing the next message after a default of 3.5 seconds before animating to the next
  *  - statically showing a single message if there is only one message to show
  *  - showing certain messages immediately, assuming te current message has been shown for
  *  at least {@link KeyguardIndication#getMinVisibilityMillis()}. For example, transient and
  *  biometric messages are meant to be shown immediately.
  *  - ending animations when dozing begins, and resuming when dozing ends. Rotating messages on
  *  AoD is undesirable since it wakes up the AP too often.
  */
 public class KeyguardIndicationRotateTextViewController extends
         ViewController<KeyguardIndicationTextView> implements Dumpable {
     public static String TAG = "KgIndicationRotatingCtrl";
     private static final long DEFAULT_INDICATION_SHOW_LENGTH = 3500; // milliseconds
     public static final long IMPORTANT_MSG_MIN_DURATION = 2000L + 600L; // 2000ms + [Y in duration]

     private final StatusBarStateController mStatusBarStateController;
     private final float mMaxAlpha;
     private final ColorStateList mInitialTextColorState;

     // Stores @IndicationType => KeyguardIndication messages
     private final Map<Integer, KeyguardIndication> mIndicationMessages = new HashMap<>();

     // Executor that will show the next message after a delay
     private final DelayableExecutor mExecutor;
     @Nullable private ShowNextIndication mShowNextIndicationRunnable;

     // List of indication types to show. The next indication to show is always at index 0
     private final List<Integer> mIndicationQueue = new LinkedList<>();
     private @IndicationType int mCurrIndicationType = INDICATION_TYPE_NONE;
     private CharSequence mCurrMessage;
     private long mLastIndicationSwitch;

     private boolean mIsDozing;

     public KeyguardIndicationRotateTextViewController(
             KeyguardIndicationTextView view,
             @Main DelayableExecutor executor,
             StatusBarStateController statusBarStateController
     ) {
         super(view);
         mMaxAlpha = view.getAlpha();
         mExecutor = executor;
         mInitialTextColorState = mView != null
                 ? mView.getTextColors() : ColorStateList.valueOf(Color.WHITE);
         mStatusBarStateController = statusBarStateController;
         init();
     }

     @Override
     protected void onViewAttached() {
         mStatusBarStateController.addCallback(mStatusBarStateListener);
     }

     @Override
     protected void onViewDetached() {
         mStatusBarStateController.removeCallback(mStatusBarStateListener);
         cancelScheduledIndication();
     }

     /**
      * Update the indication type with the given String.
      * @param type of indication
      * @param newIndication message to associate with this indication type
      * @param showAsap if true: shows this indication message as soon as possible. If false,
      *                   the text associated with this type is updated and will show when its turn
      *                   in the IndicationQueue comes around.
      */
     public void updateIndication(@IndicationType int type, KeyguardIndication newIndication,
             boolean showAsap) {
         if (type == INDICATION_TYPE_REVERSE_CHARGING) {
             // temporarily don't show here, instead use AmbientContainer b/181049781
             return;
         }
         long minShowDuration = getMinVisibilityMillis(mIndicationMessages.get(mCurrIndicationType));
         final boolean hasPreviousIndication = mIndicationMessages.get(type) != null
                 && !TextUtils.isEmpty(mIndicationMessages.get(type).getMessage());
         final boolean hasNewIndication = newIndication != null;
         if (!hasNewIndication) {
             mIndicationMessages.remove(type);
             mIndicationQueue.removeIf(x -> x == type);
         } else {
             if (!hasPreviousIndication) {
                 mIndicationQueue.add(type);
             }

             mIndicationMessages.put(type, newIndication);
         }

         if (mIsDozing) {
             return;
         }

         long currTime = SystemClock.uptimeMillis();
         long timeSinceLastIndicationSwitch = currTime - mLastIndicationSwitch;
         boolean currMsgShownForMinTime = timeSinceLastIndicationSwitch >= minShowDuration;
         if (hasNewIndication) {
             if (mCurrIndicationType == INDICATION_TYPE_NONE || mCurrIndicationType == type) {
                 showIndication(type);
             } else if (showAsap) {
                 if (currMsgShownForMinTime) {
                     showIndication(type);
                 } else {
                     mIndicationQueue.removeIf(x -> x == type);
                     mIndicationQueue.add(0 /* index */, type /* type */);
                     scheduleShowNextIndication(minShowDuration - timeSinceLastIndicationSwitch);
                 }
             } else if (!isNextIndicationScheduled()) {
                 long nextShowTime = Math.max(
                         getMinVisibilityMillis(mIndicationMessages.get(type)),
                         DEFAULT_INDICATION_SHOW_LENGTH);
                 if (timeSinceLastIndicationSwitch >= nextShowTime) {
                     showIndication(type);
                 } else {
                     scheduleShowNextIndication(
                             nextShowTime - timeSinceLastIndicationSwitch);
                 }
             }
             return;
         }

         // current indication is updated to empty
         if (mCurrIndicationType == type
                 && !hasNewIndication
                 && showAsap) {
             if (currMsgShownForMinTime) {
                 if (mShowNextIndicationRunnable != null) {
                     mShowNextIndicationRunnable.runImmediately();
                 } else {
                     showIndication(INDICATION_TYPE_NONE);
                 }
             } else {
                 scheduleShowNextIndication(minShowDuration - timeSinceLastIndicationSwitch);
             }
         }
     }

     /**
      * Stop showing the following indication type.
      *
      * If the current indication is of this type, immediately stops showing the message.
      */
     public void hideIndication(@IndicationType int type) {
         if (!mIndicationMessages.containsKey(type)
                 || TextUtils.isEmpty(mIndicationMessages.get(type).getMessage())) {
             return;
         }
         updateIndication(type, null, true);
     }

     /**
      * Show a transient message.
      * Transient messages:
      * - show immediately
      * - will continue to be in the rotation of messages shown until hideTransient is called.
      */
     public void showTransient(CharSequence newIndication) {
         updateIndication(INDICATION_TYPE_TRANSIENT,
                 new KeyguardIndication.Builder()
                         .setMessage(newIndication)
                         .setMinVisibilityMillis(IMPORTANT_MSG_MIN_DURATION)
                         .setTextColor(mInitialTextColorState)
                         .build(),
                 /* showImmediately */true);
     }

     /**
      * Hide a transient message immediately.
      */
     public void hideTransient() {
         hideIndication(INDICATION_TYPE_TRANSIENT);
     }

     /**
      * @return true if there are available indications to show
      */
     public boolean hasIndications() {
         return mIndicationMessages.keySet().size() > 0;
     }

     /**
      * Clears all messages in the queue and sets the current message to an empty string.
      */
     public void clearMessages() {
         mCurrIndicationType = INDICATION_TYPE_NONE;
         mIndicationQueue.clear();
         mView.clearMessages();
     }

     /**
      * Immediately show the passed indication type and schedule the next indication to show.
      * Will re-add this indication to be re-shown after all other indications have been
      * rotated through.
      */
     private void showIndication(@IndicationType int type) {
         cancelScheduledIndication();

         final CharSequence previousMessage = mCurrMessage;
         final @IndicationType int previousIndicationType = mCurrIndicationType;
         mCurrIndicationType = type;
         mCurrMessage = mIndicationMessages.get(type) != null
                 ? mIndicationMessages.get(type).getMessage()
                 : null;

         mIndicationQueue.removeIf(x -> x == type);
         if (mCurrIndicationType != INDICATION_TYPE_NONE) {
             mIndicationQueue.add(type); // re-add to show later
         }

         mLastIndicationSwitch = SystemClock.uptimeMillis();
         if (!TextUtils.equals(previousMessage, mCurrMessage)
                 || previousIndicationType != mCurrIndicationType) {
             mView.switchIndication(mIndicationMessages.get(type));
         }

         // only schedule next indication if there's more than just this indication in the queue
         if (mCurrIndicationType != INDICATION_TYPE_NONE && mIndicationQueue.size() > 1) {
             scheduleShowNextIndication(Math.max(
                     getMinVisibilityMillis(mIndicationMessages.get(type)),
                     DEFAULT_INDICATION_SHOW_LENGTH));
         }
     }

     private long getMinVisibilityMillis(KeyguardIndication indication) {
         if (indication == null) {
             return 0;
         }

         if (indication.getMinVisibilityMillis() == null) {
             return 0;
         }

         return indication.getMinVisibilityMillis();
     }

     protected boolean isNextIndicationScheduled() {
         return mShowNextIndicationRunnable != null;
     }


     private void scheduleShowNextIndication(long msUntilShowNextMsg) {
         cancelScheduledIndication();
         mShowNextIndicationRunnable = new ShowNextIndication(msUntilShowNextMsg);
     }

     private void cancelScheduledIndication() {
         if (mShowNextIndicationRunnable != null) {
             mShowNextIndicationRunnable.cancelDelayedExecution();
             mShowNextIndicationRunnable = null;
         }
     }

     private StatusBarStateController.StateListener mStatusBarStateListener =
             new StatusBarStateController.StateListener() {
                 @Override
                 public void onDozeAmountChanged(float linear, float eased) {
                     mView.setAlpha((1 - linear) * mMaxAlpha);
                 }

                 @Override
                 public void onDozingChanged(boolean isDozing) {
                     if (isDozing == mIsDozing) return;
                     mIsDozing = isDozing;
                     if (mIsDozing) {
                         showIndication(INDICATION_TYPE_NONE);
                     } else if (mIndicationQueue.size() > 0) {
                         showIndication(mIndicationQueue.remove(0));
                     }
                 }
             };

     /**
      * Shows the next indication in the IndicationQueue after an optional delay.
      * This wrapper has the ability to cancel itself (remove runnable from DelayableExecutor) or
      * immediately run itself (which also removes itself from the DelayableExecutor).
      */
     class ShowNextIndication {
         private final Runnable mShowIndicationRunnable;
         private Runnable mCancelDelayedRunnable;

         ShowNextIndication(long delay) {
             mShowIndicationRunnable = () -> {
                 int type = mIndicationQueue.size() == 0
                         ? INDICATION_TYPE_NONE : mIndicationQueue.remove(0);
                 showIndication(type);
             };
             mCancelDelayedRunnable = mExecutor.executeDelayed(mShowIndicationRunnable, delay);
         }

         public void runImmediately() {
             cancelDelayedExecution();
             mShowIndicationRunnable.run();
         }

         public void cancelDelayedExecution() {
             if (mCancelDelayedRunnable != null) {
                 mCancelDelayedRunnable.run();
                 mCancelDelayedRunnable = null;
             }
         }
     }

     @Override
     public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
         pw.println("KeyguardIndicationRotatingTextViewController:");
         pw.println("    currentMessage=" + mView.getText());
         pw.println("    dozing:" + mIsDozing);
         pw.println("    queue:" + mIndicationQueue.toString());
         pw.println("    showNextIndicationRunnable:" + mShowNextIndicationRunnable);

         if (hasIndications()) {
             pw.println("    All messages:");
             for (int type : mIndicationMessages.keySet()) {
                 pw.println("        type=" + type + " " + mIndicationMessages.get(type));
             }
         }
     }

     // only used locally to stop showing any messages & stop the rotating messages
     static final int INDICATION_TYPE_NONE = -1;

     public static final int INDICATION_TYPE_OWNER_INFO = 0;
     public static final int INDICATION_TYPE_DISCLOSURE = 1;
     public static final int INDICATION_TYPE_LOGOUT = 2;
     public static final int INDICATION_TYPE_BATTERY = 3;
     public static final int INDICATION_TYPE_ALIGNMENT = 4;
     public static final int INDICATION_TYPE_TRANSIENT = 5;
     public static final int INDICATION_TYPE_TRUST = 6;
     public static final int INDICATION_TYPE_RESTING = 7;
     public static final int INDICATION_TYPE_USER_LOCKED = 8;
     public static final int INDICATION_TYPE_REVERSE_CHARGING = 10;
     public static final int INDICATION_TYPE_BIOMETRIC_MESSAGE = 11;

     @IntDef({
             INDICATION_TYPE_NONE,
             INDICATION_TYPE_DISCLOSURE,
             INDICATION_TYPE_OWNER_INFO,
             INDICATION_TYPE_LOGOUT,
             INDICATION_TYPE_BATTERY,
             INDICATION_TYPE_ALIGNMENT,
             INDICATION_TYPE_TRANSIENT,
             INDICATION_TYPE_TRUST,
             INDICATION_TYPE_RESTING,
             INDICATION_TYPE_USER_LOCKED,
             INDICATION_TYPE_REVERSE_CHARGING,
             INDICATION_TYPE_BIOMETRIC_MESSAGE
     })
     @Retention(RetentionPolicy.SOURCE)
     public @interface IndicationType{}
 }
	/*
	* Copyright (C) 2021 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.systemui.keyguard;

	import android.annotation.Nullable;
	import android.content.res.ColorStateList;
	import android.graphics.Color;
	import android.os.SystemClock;
	import android.text.TextUtils;

	import androidx.annotation.IntDef;

	import com.android.systemui.Dumpable;
	import com.android.systemui.dagger.qualifiers.Main;
	import com.android.systemui.plugins.statusbar.StatusBarStateController;
	import com.android.systemui.statusbar.phone.KeyguardIndicationTextView;
	import com.android.systemui.util.ViewController;
	import com.android.systemui.util.concurrency.DelayableExecutor;

	import java.io.FileDescriptor;
	import java.io.PrintWriter;
	import java.lang.annotation.Retention;
	import java.lang.annotation.RetentionPolicy;
	import java.util.HashMap;
	import java.util.LinkedList;
	import java.util.List;
	import java.util.Map;

	/**
	* Animates through messages to show on the keyguard bottom area on the lock screen.
	* Utilizes a {@link KeyguardIndicationTextView} for animations. This class handles the rotating
	* nature of the messages including:
	* - ensuring a message is shown for its minimum amount of time. Minimum time is determined by
	* {@link KeyguardIndication#getMinVisibilityMillis()}
	* - showing the next message after a default of 3.5 seconds before animating to the next
	* - statically showing a single message if there is only one message to show
	* - showing certain messages immediately, assuming te current message has been shown for
	* at least {@link KeyguardIndication#getMinVisibilityMillis()}. For example, transient and
	* biometric messages are meant to be shown immediately.
	* - ending animations when dozing begins, and resuming when dozing ends. Rotating messages on
	* AoD is undesirable since it wakes up the AP too often.
	*/
	public class KeyguardIndicationRotateTextViewController extends
	ViewController<KeyguardIndicationTextView> implements Dumpable {
	public static String TAG = "KgIndicationRotatingCtrl";
	private static final long DEFAULT_INDICATION_SHOW_LENGTH = 3500; // milliseconds
	public static final long IMPORTANT_MSG_MIN_DURATION = 2000L + 600L; // 2000ms + [Y in duration]

	private final StatusBarStateController mStatusBarStateController;
	private final float mMaxAlpha;
	private final ColorStateList mInitialTextColorState;

	// Stores @IndicationType => KeyguardIndication messages
	private final Map<Integer, KeyguardIndication> mIndicationMessages = new HashMap<>();

	// Executor that will show the next message after a delay
	private final DelayableExecutor mExecutor;
	@Nullable private ShowNextIndication mShowNextIndicationRunnable;

	// List of indication types to show. The next indication to show is always at index 0
	private final List<Integer> mIndicationQueue = new LinkedList<>();
	private @IndicationType int mCurrIndicationType = INDICATION_TYPE_NONE;
	private CharSequence mCurrMessage;
	private long mLastIndicationSwitch;

	private boolean mIsDozing;

	public KeyguardIndicationRotateTextViewController(
	KeyguardIndicationTextView view,
	@Main DelayableExecutor executor,
	StatusBarStateController statusBarStateController
	) {
	super(view);
	mMaxAlpha = view.getAlpha();
	mExecutor = executor;
	mInitialTextColorState = mView != null
	? mView.getTextColors() : ColorStateList.valueOf(Color.WHITE);
	mStatusBarStateController = statusBarStateController;
	init();
	}

	@Override
	protected void onViewAttached() {
	mStatusBarStateController.addCallback(mStatusBarStateListener);
	}

	@Override
	protected void onViewDetached() {
	mStatusBarStateController.removeCallback(mStatusBarStateListener);
	cancelScheduledIndication();
	}

	/**
	* Update the indication type with the given String.
	* @param type of indication
	* @param newIndication message to associate with this indication type
	* @param showAsap if true: shows this indication message as soon as possible. If false,
	* the text associated with this type is updated and will show when its turn
	* in the IndicationQueue comes around.
	*/
	public void updateIndication(@IndicationType int type, KeyguardIndication newIndication,
	boolean showAsap) {
	if (type == INDICATION_TYPE_REVERSE_CHARGING) {
	// temporarily don't show here, instead use AmbientContainer b/181049781
	return;
	}
	long minShowDuration = getMinVisibilityMillis(mIndicationMessages.get(mCurrIndicationType));
	final boolean hasPreviousIndication = mIndicationMessages.get(type) != null
	&& !TextUtils.isEmpty(mIndicationMessages.get(type).getMessage());
	final boolean hasNewIndication = newIndication != null;
	if (!hasNewIndication) {
	mIndicationMessages.remove(type);
	mIndicationQueue.removeIf(x -> x == type);
	} else {
	if (!hasPreviousIndication) {
	mIndicationQueue.add(type);
	}

	mIndicationMessages.put(type, newIndication);
	}

	if (mIsDozing) {
	return;
	}

	long currTime = SystemClock.uptimeMillis();
	long timeSinceLastIndicationSwitch = currTime - mLastIndicationSwitch;
	boolean currMsgShownForMinTime = timeSinceLastIndicationSwitch >= minShowDuration;
	if (hasNewIndication) {
	if (mCurrIndicationType == INDICATION_TYPE_NONE \|\| mCurrIndicationType == type) {
	showIndication(type);
	} else if (showAsap) {
	if (currMsgShownForMinTime) {
	showIndication(type);
	} else {
	mIndicationQueue.removeIf(x -> x == type);
	mIndicationQueue.add(0 /* index /, type / type */);
	scheduleShowNextIndication(minShowDuration - timeSinceLastIndicationSwitch);
	}
	} else if (!isNextIndicationScheduled()) {
	long nextShowTime = Math.max(
	getMinVisibilityMillis(mIndicationMessages.get(type)),
	DEFAULT_INDICATION_SHOW_LENGTH);
	if (timeSinceLastIndicationSwitch >= nextShowTime) {
	showIndication(type);
	} else {
	scheduleShowNextIndication(
	nextShowTime - timeSinceLastIndicationSwitch);
	}
	}
	return;
	}

	// current indication is updated to empty
	if (mCurrIndicationType == type
	&& !hasNewIndication
	&& showAsap) {
	if (currMsgShownForMinTime) {
	if (mShowNextIndicationRunnable != null) {
	mShowNextIndicationRunnable.runImmediately();
	} else {
	showIndication(INDICATION_TYPE_NONE);
	}
	} else {
	scheduleShowNextIndication(minShowDuration - timeSinceLastIndicationSwitch);
	}
	}
	}

	/**
	* Stop showing the following indication type.
	*
	* If the current indication is of this type, immediately stops showing the message.
	*/
	public void hideIndication(@IndicationType int type) {
	if (!mIndicationMessages.containsKey(type)
	\|\| TextUtils.isEmpty(mIndicationMessages.get(type).getMessage())) {
	return;
	}
	updateIndication(type, null, true);
	}

	/**
	* Show a transient message.
	* Transient messages:
	* - show immediately
	* - will continue to be in the rotation of messages shown until hideTransient is called.
	*/
	public void showTransient(CharSequence newIndication) {
	updateIndication(INDICATION_TYPE_TRANSIENT,
	new KeyguardIndication.Builder()
	.setMessage(newIndication)
	.setMinVisibilityMillis(IMPORTANT_MSG_MIN_DURATION)
	.setTextColor(mInitialTextColorState)
	.build(),
	/* showImmediately */true);
	}

	/**
	* Hide a transient message immediately.
	*/
	public void hideTransient() {
	hideIndication(INDICATION_TYPE_TRANSIENT);
	}

	/**
	* @return true if there are available indications to show
	*/
	public boolean hasIndications() {
	return mIndicationMessages.keySet().size() > 0;
	}

	/**
	* Clears all messages in the queue and sets the current message to an empty string.
	*/
	public void clearMessages() {
	mCurrIndicationType = INDICATION_TYPE_NONE;
	mIndicationQueue.clear();
	mView.clearMessages();
	}

	/**
	* Immediately show the passed indication type and schedule the next indication to show.
	* Will re-add this indication to be re-shown after all other indications have been
	* rotated through.
	*/
	private void showIndication(@IndicationType int type) {
	cancelScheduledIndication();

	final CharSequence previousMessage = mCurrMessage;
	final @IndicationType int previousIndicationType = mCurrIndicationType;
	mCurrIndicationType = type;
	mCurrMessage = mIndicationMessages.get(type) != null
	? mIndicationMessages.get(type).getMessage()
	: null;

	mIndicationQueue.removeIf(x -> x == type);
	if (mCurrIndicationType != INDICATION_TYPE_NONE) {
	mIndicationQueue.add(type); // re-add to show later
	}

	mLastIndicationSwitch = SystemClock.uptimeMillis();
	if (!TextUtils.equals(previousMessage, mCurrMessage)
	\|\| previousIndicationType != mCurrIndicationType) {
	mView.switchIndication(mIndicationMessages.get(type));
	}

	// only schedule next indication if there's more than just this indication in the queue
	if (mCurrIndicationType != INDICATION_TYPE_NONE && mIndicationQueue.size() > 1) {
	scheduleShowNextIndication(Math.max(
	getMinVisibilityMillis(mIndicationMessages.get(type)),
	DEFAULT_INDICATION_SHOW_LENGTH));
	}
	}

	private long getMinVisibilityMillis(KeyguardIndication indication) {
	if (indication == null) {
	return 0;
	}

	if (indication.getMinVisibilityMillis() == null) {
	return 0;
	}

	return indication.getMinVisibilityMillis();
	}

	protected boolean isNextIndicationScheduled() {
	return mShowNextIndicationRunnable != null;
	}


	private void scheduleShowNextIndication(long msUntilShowNextMsg) {
	cancelScheduledIndication();
	mShowNextIndicationRunnable = new ShowNextIndication(msUntilShowNextMsg);
	}

	private void cancelScheduledIndication() {
	if (mShowNextIndicationRunnable != null) {
	mShowNextIndicationRunnable.cancelDelayedExecution();
	mShowNextIndicationRunnable = null;
	}
	}

	private StatusBarStateController.StateListener mStatusBarStateListener =
	new StatusBarStateController.StateListener() {
	@Override
	public void onDozeAmountChanged(float linear, float eased) {
	mView.setAlpha((1 - linear) * mMaxAlpha);
	}

	@Override
	public void onDozingChanged(boolean isDozing) {
	if (isDozing == mIsDozing) return;
	mIsDozing = isDozing;
	if (mIsDozing) {
	showIndication(INDICATION_TYPE_NONE);
	} else if (mIndicationQueue.size() > 0) {
	showIndication(mIndicationQueue.remove(0));
	}
	}
	};

	/**
	* Shows the next indication in the IndicationQueue after an optional delay.
	* This wrapper has the ability to cancel itself (remove runnable from DelayableExecutor) or
	* immediately run itself (which also removes itself from the DelayableExecutor).
	*/
	class ShowNextIndication {
	private final Runnable mShowIndicationRunnable;
	private Runnable mCancelDelayedRunnable;

	ShowNextIndication(long delay) {
	mShowIndicationRunnable = () -> {
	int type = mIndicationQueue.size() == 0
	? INDICATION_TYPE_NONE : mIndicationQueue.remove(0);
	showIndication(type);
	};
	mCancelDelayedRunnable = mExecutor.executeDelayed(mShowIndicationRunnable, delay);
	}

	public void runImmediately() {
	cancelDelayedExecution();
	mShowIndicationRunnable.run();
	}

	public void cancelDelayedExecution() {
	if (mCancelDelayedRunnable != null) {
	mCancelDelayedRunnable.run();
	mCancelDelayedRunnable = null;
	}
	}
	}

	@Override
	public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
	pw.println("KeyguardIndicationRotatingTextViewController:");
	pw.println(" currentMessage=" + mView.getText());
	pw.println(" dozing:" + mIsDozing);
	pw.println(" queue:" + mIndicationQueue.toString());
	pw.println(" showNextIndicationRunnable:" + mShowNextIndicationRunnable);

	if (hasIndications()) {
	pw.println(" All messages:");
	for (int type : mIndicationMessages.keySet()) {
	pw.println(" type=" + type + " " + mIndicationMessages.get(type));
	}
	}
	}

	// only used locally to stop showing any messages & stop the rotating messages
	static final int INDICATION_TYPE_NONE = -1;

	public static final int INDICATION_TYPE_OWNER_INFO = 0;
	public static final int INDICATION_TYPE_DISCLOSURE = 1;
	public static final int INDICATION_TYPE_LOGOUT = 2;
	public static final int INDICATION_TYPE_BATTERY = 3;
	public static final int INDICATION_TYPE_ALIGNMENT = 4;
	public static final int INDICATION_TYPE_TRANSIENT = 5;
	public static final int INDICATION_TYPE_TRUST = 6;
	public static final int INDICATION_TYPE_RESTING = 7;
	public static final int INDICATION_TYPE_USER_LOCKED = 8;
	public static final int INDICATION_TYPE_REVERSE_CHARGING = 10;
	public static final int INDICATION_TYPE_BIOMETRIC_MESSAGE = 11;

	@IntDef({
	INDICATION_TYPE_NONE,
	INDICATION_TYPE_DISCLOSURE,
	INDICATION_TYPE_OWNER_INFO,
	INDICATION_TYPE_LOGOUT,
	INDICATION_TYPE_BATTERY,
	INDICATION_TYPE_ALIGNMENT,
	INDICATION_TYPE_TRANSIENT,
	INDICATION_TYPE_TRUST,
	INDICATION_TYPE_RESTING,
	INDICATION_TYPE_USER_LOCKED,
	INDICATION_TYPE_REVERSE_CHARGING,
	INDICATION_TYPE_BIOMETRIC_MESSAGE
	})
	@Retention(RetentionPolicy.SOURCE)
	public @interface IndicationType{}
	}