Add ViewController to CarrierText.

Rename CarrierTextController to CarrierTextManager to avoid confusion.

Removes several calls to Dependency.get(). This was the primary
impetus for this change.

Bug: 179775696
Test: atest SystemUITests
Change-Id: I6d027169247e8b93fe979e54c04a61bbacb4cca5

1 files changed, 36 insertions, 655 deletions

diff --git a/packages/SystemUI/src/com/android/keyguard/CarrierTextController.java b/packages/SystemUI/src/com/android/keyguard/CarrierTextController.java
index b1e14346c3fa..46a6d8b82911 100644
--- a/packages/SystemUI/src/com/android/keyguard/CarrierTextController.java
+++ b/packages/SystemUI/src/com/android/keyguard/CarrierTextController.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2019 The Android Open Source Project
+ * 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.
@@ -16,680 +16,61 @@
 
 package com.android.keyguard;
 
-import static android.telephony.PhoneStateListener.LISTEN_ACTIVE_DATA_SUBSCRIPTION_ID_CHANGE;
-import static android.telephony.PhoneStateListener.LISTEN_NONE;
-
-import android.content.Context;
-import android.content.Intent;
-import android.content.IntentFilter;
-import android.content.res.Resources;
-import android.net.ConnectivityManager;
-import android.net.wifi.WifiManager;
-import android.os.Handler;
-import android.telephony.PhoneStateListener;
-import android.telephony.ServiceState;
-import android.telephony.SubscriptionInfo;
-import android.telephony.SubscriptionManager;
-import android.telephony.TelephonyManager;
-import android.text.TextUtils;
-import android.util.Log;
-
-import androidx.annotation.Nullable;
-import androidx.annotation.VisibleForTesting;
-
-import com.android.settingslib.WirelessUtils;
-import com.android.systemui.Dependency;
-import com.android.systemui.R;
-import com.android.systemui.dagger.qualifiers.Main;
-import com.android.systemui.keyguard.WakefulnessLifecycle;
-
-import java.util.List;
-import java.util.Objects;
-import java.util.concurrent.atomic.AtomicBoolean;
+import com.android.systemui.util.ViewController;
 
 import javax.inject.Inject;
 
 /**
- * Controller that generates text including the carrier names and/or the status of all the SIM
- * interfaces in the device. Through a callback, the updates can be retrieved either as a list or
- * separated by a given separator {@link CharSequence}.
+ * Controller for {@link CarrierText}.
  */
-public class CarrierTextController {
-    private static final boolean DEBUG = KeyguardConstants.DEBUG;
-    private static final String TAG = "CarrierTextController";
+public class CarrierTextController extends ViewController<CarrierText> {
+    private final CarrierTextManager mCarrierTextManager;
+    private final KeyguardUpdateMonitor mKeyguardUpdateMonitor;
 
-    private final boolean mIsEmergencyCallCapable;
-    private final Handler mMainHandler;
-    private final Handler mBgHandler;
-    private boolean mTelephonyCapable;
-    private boolean mShowMissingSim;
-    private boolean mShowAirplaneMode;
-    private final AtomicBoolean mNetworkSupported = new AtomicBoolean();
-    @VisibleForTesting
-    protected KeyguardUpdateMonitor mKeyguardUpdateMonitor;
-    private WifiManager mWifiManager;
-    private boolean[] mSimErrorState;
-    private final int mSimSlotsNumber;
-    @Nullable // Check for nullability before dispatching
-    private CarrierTextCallback mCarrierTextCallback;
-    private Context mContext;
-    private CharSequence mSeparator;
-    private WakefulnessLifecycle mWakefulnessLifecycle;
-    private final WakefulnessLifecycle.Observer mWakefulnessObserver =
-            new WakefulnessLifecycle.Observer() {
+    private final CarrierTextManager.CarrierTextCallback mCarrierTextCallback =
+            new CarrierTextManager.CarrierTextCallback() {
                 @Override
-                public void onFinishedWakingUp() {
-                    final CarrierTextCallback callback = mCarrierTextCallback;
-                    if (callback != null) callback.finishedWakingUp();
+                public void updateCarrierInfo(CarrierTextManager.CarrierTextCallbackInfo info) {
+                    mView.setText(info.carrierText);
                 }
 
                 @Override
-                public void onStartedGoingToSleep() {
-                    final CarrierTextCallback callback = mCarrierTextCallback;
-                    if (callback != null) callback.startedGoingToSleep();
+                public void startedGoingToSleep() {
+                    mView.setSelected(false);
                 }
-            };
-
-    @VisibleForTesting
-    protected final KeyguardUpdateMonitorCallback mCallback = new KeyguardUpdateMonitorCallback() {
-        @Override
-        public void onRefreshCarrierInfo() {
-            if (DEBUG) {
-                Log.d(TAG, "onRefreshCarrierInfo(), mTelephonyCapable: "
-                        + Boolean.toString(mTelephonyCapable));
-            }
-            updateCarrierText();
-        }
-
-        @Override
-        public void onTelephonyCapable(boolean capable) {
-            if (DEBUG) {
-                Log.d(TAG, "onTelephonyCapable() mTelephonyCapable: "
-                        + Boolean.toString(capable));
-            }
-            mTelephonyCapable = capable;
-            updateCarrierText();
-        }
-
-        public void onSimStateChanged(int subId, int slotId, int simState) {
-            if (slotId < 0 || slotId >= mSimSlotsNumber) {
-                Log.d(TAG, "onSimStateChanged() - slotId invalid: " + slotId
-                        + " mTelephonyCapable: " + Boolean.toString(mTelephonyCapable));
-                return;
-            }
-
-            if (DEBUG) Log.d(TAG, "onSimStateChanged: " + getStatusForIccState(simState));
-            if (getStatusForIccState(simState) == CarrierTextController.StatusMode.SimIoError) {
-                mSimErrorState[slotId] = true;
-                updateCarrierText();
-            } else if (mSimErrorState[slotId]) {
-                mSimErrorState[slotId] = false;
-                updateCarrierText();
-            }
-        }
-    };
-
-    private int mActiveMobileDataSubscription = SubscriptionManager.INVALID_SUBSCRIPTION_ID;
-    private PhoneStateListener mPhoneStateListener = new PhoneStateListener() {
-        @Override
-        public void onActiveDataSubscriptionIdChanged(int subId) {
-            mActiveMobileDataSubscription = subId;
-            if (mNetworkSupported.get() && mCarrierTextCallback != null) {
-                updateCarrierText();
-            }
-        }
-    };
-
-    /**
-     * The status of this lock screen. Primarily used for widgets on LockScreen.
-     */
-    private enum StatusMode {
-        Normal, // Normal case (sim card present, it's not locked)
-        NetworkLocked, // SIM card is 'network locked'.
-        SimMissing, // SIM card is missing.
-        SimMissingLocked, // SIM card is missing, and device isn't provisioned; don't allow access
-        SimPukLocked, // SIM card is PUK locked because SIM entered wrong too many times
-        SimLocked, // SIM card is currently locked
-        SimPermDisabled, // SIM card is permanently disabled due to PUK unlock failure
-        SimNotReady, // SIM is not ready yet. May never be on devices w/o a SIM.
-        SimIoError, // SIM card is faulty
-        SimUnknown // SIM card is unknown
-    }
-
-    /**
-     * Controller that provides updates on text with carriers names or SIM status.
-     * Used by {@link CarrierText}.
-     *
-     * @param separator Separator between different parts of the text
-     */
-    public CarrierTextController(Context context, CharSequence separator, boolean showAirplaneMode,
-            boolean showMissingSim) {
-        mContext = context;
-        mIsEmergencyCallCapable = getTelephonyManager().isVoiceCapable();
-
-        mShowAirplaneMode = showAirplaneMode;
-        mShowMissingSim = showMissingSim;
-
-        mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
-        mSeparator = separator;
-        mWakefulnessLifecycle = Dependency.get(WakefulnessLifecycle.class);
-        mSimSlotsNumber = getTelephonyManager().getSupportedModemCount();
-        mSimErrorState = new boolean[mSimSlotsNumber];
-        mMainHandler = Dependency.get(Dependency.MAIN_HANDLER);
-        mBgHandler = new Handler(Dependency.get(Dependency.BG_LOOPER));
-        mKeyguardUpdateMonitor = Dependency.get(KeyguardUpdateMonitor.class);
-        mBgHandler.post(() -> {
-            boolean supported = ConnectivityManager.from(mContext).isNetworkSupported(
-                    ConnectivityManager.TYPE_MOBILE);
-            if (supported && mNetworkSupported.compareAndSet(false, supported)) {
-                // This will set/remove the listeners appropriately. Note that it will never double
-                // add the listeners.
-                handleSetListening(mCarrierTextCallback);
-            }
-        });
-    }
-
-    private TelephonyManager getTelephonyManager() {
-        return (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
-    }
-
-    /**
-     * Checks if there are faulty cards. Adds the text depending on the slot of the card
-     *
-     * @param text:   current carrier text based on the sim state
-     * @param carrierNames names order by subscription order
-     * @param subOrderBySlot array containing the sub index for each slot ID
-     * @param noSims: whether a valid sim card is inserted
-     * @return text
-     */
-    private CharSequence updateCarrierTextWithSimIoError(CharSequence text,
-            CharSequence[] carrierNames, int[] subOrderBySlot, boolean noSims) {
-        final CharSequence carrier = "";
-        CharSequence carrierTextForSimIOError = getCarrierTextForSimState(
-                TelephonyManager.SIM_STATE_CARD_IO_ERROR, carrier);
-        // mSimErrorState has the state of each sim indexed by slotID.
-        for (int index = 0; index < getTelephonyManager().getActiveModemCount(); index++) {
-            if (!mSimErrorState[index]) {
-                continue;
-            }
-            // In the case when no sim cards are detected but a faulty card is inserted
-            // overwrite the text and only show "Invalid card"
-            if (noSims) {
-                return concatenate(carrierTextForSimIOError,
-                        getContext().getText(
-                                com.android.internal.R.string.emergency_calls_only),
-                        mSeparator);
-            } else if (subOrderBySlot[index] != -1) {
-                int subIndex = subOrderBySlot[index];
-                // prepend "Invalid card" when faulty card is inserted in slot 0 or 1
-                carrierNames[subIndex] = concatenate(carrierTextForSimIOError,
-                        carrierNames[subIndex],
-                        mSeparator);
-            } else {
-                // concatenate "Invalid card" when faulty card is inserted in other slot
-                text = concatenate(text, carrierTextForSimIOError, mSeparator);
-            }
-
-        }
-        return text;
-    }
-
-    /**
-     * This may be called internally after retrieving the correct value of {@code mNetworkSupported}
-     * (assumed false to start). In that case, the following happens:
-     * <ul>
-     *     <li> If there was a registered callback, and the network is supported, it will register
-     *          listeners.
-     *     <li> If there was not a registered callback, it will try to remove unregistered listeners
-     *          which is a no-op
-     * </ul>
-     *
-     * This call will always be processed in a background thread.
-     */
-    private void handleSetListening(CarrierTextCallback callback) {
-        TelephonyManager telephonyManager = getTelephonyManager();
-        if (callback != null) {
-            mCarrierTextCallback = callback;
-            if (mNetworkSupported.get()) {
-                // Keyguard update monitor expects callbacks from main thread
-                mMainHandler.post(() -> mKeyguardUpdateMonitor.registerCallback(mCallback));
-                mWakefulnessLifecycle.addObserver(mWakefulnessObserver);
-                telephonyManager.listen(mPhoneStateListener,
-                        LISTEN_ACTIVE_DATA_SUBSCRIPTION_ID_CHANGE);
-            } else {
-                // Don't listen and clear out the text when the device isn't a phone.
-                mMainHandler.post(() -> callback.updateCarrierInfo(
-                        new CarrierTextCallbackInfo("", null, false, null)
-                ));
-            }
-        } else {
-            mCarrierTextCallback = null;
-            mMainHandler.post(() -> mKeyguardUpdateMonitor.removeCallback(mCallback));
-            mWakefulnessLifecycle.removeObserver(mWakefulnessObserver);
-            telephonyManager.listen(mPhoneStateListener, LISTEN_NONE);
-        }
-    }
-
-    /**
-     * Sets the listening status of this controller. If the callback is null, it is set to
-     * not listening.
-     *
-     * @param callback Callback to provide text updates
-     */
-    public void setListening(CarrierTextCallback callback) {
-        mBgHandler.post(() -> handleSetListening(callback));
-    }
-
-    protected List<SubscriptionInfo> getSubscriptionInfo() {
-        return mKeyguardUpdateMonitor.getFilteredSubscriptionInfo(false);
-    }
-
-    protected void updateCarrierText() {
-        boolean allSimsMissing = true;
-        boolean anySimReadyAndInService = false;
-        CharSequence displayText = null;
-        List<SubscriptionInfo> subs = getSubscriptionInfo();
-
-        final int numSubs = subs.size();
-        final int[] subsIds = new int[numSubs];
-        // This array will contain in position i, the index of subscription in slot ID i.
-        // -1 if no subscription in that slot
-        final int[] subOrderBySlot = new int[mSimSlotsNumber];
-        for (int i = 0; i < mSimSlotsNumber; i++) {
-            subOrderBySlot[i] = -1;
-        }
-        final CharSequence[] carrierNames = new CharSequence[numSubs];
-        if (DEBUG) Log.d(TAG, "updateCarrierText(): " + numSubs);
-
-        for (int i = 0; i < numSubs; i++) {
-            int subId = subs.get(i).getSubscriptionId();
-            carrierNames[i] = "";
-            subsIds[i] = subId;
-            subOrderBySlot[subs.get(i).getSimSlotIndex()] = i;
-            int simState = mKeyguardUpdateMonitor.getSimState(subId);
-            CharSequence carrierName = subs.get(i).getCarrierName();
-            CharSequence carrierTextForSimState = getCarrierTextForSimState(simState, carrierName);
-            if (DEBUG) {
-                Log.d(TAG, "Handling (subId=" + subId + "): " + simState + " " + carrierName);
-            }
-            if (carrierTextForSimState != null) {
-                allSimsMissing = false;
-                carrierNames[i] = carrierTextForSimState;
-            }
-            if (simState == TelephonyManager.SIM_STATE_READY) {
-                ServiceState ss = mKeyguardUpdateMonitor.mServiceStates.get(subId);
-                if (ss != null && ss.getDataRegistrationState() == ServiceState.STATE_IN_SERVICE) {
-                    // hack for WFC (IWLAN) not turning off immediately once
-                    // Wi-Fi is disassociated or disabled
-                    if (ss.getRilDataRadioTechnology() != ServiceState.RIL_RADIO_TECHNOLOGY_IWLAN
-                            || (mWifiManager.isWifiEnabled()
-                            && mWifiManager.getConnectionInfo() != null
-                            && mWifiManager.getConnectionInfo().getBSSID() != null)) {
-                        if (DEBUG) {
-                            Log.d(TAG, "SIM ready and in service: subId=" + subId + ", ss=" + ss);
-                        }
-                        anySimReadyAndInService = true;
-                    }
-                }
-            }
-        }
-        // Only create "No SIM card" if no cards with CarrierName && no wifi when some sim is READY
-        // This condition will also be true always when numSubs == 0
-        if (allSimsMissing && !anySimReadyAndInService) {
-            if (numSubs != 0) {
-                // Shows "No SIM card | Emergency calls only" on devices that are voice-capable.
-                // This depends on mPlmn containing the text "Emergency calls only" when the radio
-                // has some connectivity. Otherwise, it should be null or empty and just show
-                // "No SIM card"
-                // Grab the first subscripton, because they all should contain the emergency text,
-                // described above.
-                displayText = makeCarrierStringOnEmergencyCapable(
-                        getMissingSimMessage(), subs.get(0).getCarrierName());
-            } else {
-                // We don't have a SubscriptionInfo to get the emergency calls only from.
-                // Grab it from the old sticky broadcast if possible instead. We can use it
-                // here because no subscriptions are active, so we don't have
-                // to worry about MSIM clashing.
-                CharSequence text =
-                        getContext().getText(com.android.internal.R.string.emergency_calls_only);
-                Intent i = getContext().registerReceiver(null,
-                        new IntentFilter(TelephonyManager.ACTION_SERVICE_PROVIDERS_UPDATED));
-                if (i != null) {
-                    String spn = "";
-                    String plmn = "";
-                    if (i.getBooleanExtra(TelephonyManager.EXTRA_SHOW_SPN, false)) {
-                        spn = i.getStringExtra(TelephonyManager.EXTRA_SPN);
-                    }
-                    if (i.getBooleanExtra(TelephonyManager.EXTRA_SHOW_PLMN, false)) {
-                        plmn = i.getStringExtra(TelephonyManager.EXTRA_PLMN);
-                    }
-                    if (DEBUG) Log.d(TAG, "Getting plmn/spn sticky brdcst " + plmn + "/" + spn);
-                    if (Objects.equals(plmn, spn)) {
-                        text = plmn;
-                    } else {
-                        text = concatenate(plmn, spn, mSeparator);
-                    }
-                }
-                displayText = makeCarrierStringOnEmergencyCapable(getMissingSimMessage(), text);
-            }
-        }
-
-        if (TextUtils.isEmpty(displayText)) displayText = joinNotEmpty(mSeparator, carrierNames);
-
-        displayText = updateCarrierTextWithSimIoError(displayText, carrierNames, subOrderBySlot,
-                allSimsMissing);
-
-        boolean airplaneMode = false;
-        // APM (airplane mode) != no carrier state. There are carrier services
-        // (e.g. WFC = Wi-Fi calling) which may operate in APM.
-        if (!anySimReadyAndInService && WirelessUtils.isAirplaneModeOn(mContext)) {
-            displayText = getAirplaneModeMessage();
-            airplaneMode = true;
-        }
-
-        final CarrierTextCallbackInfo info = new CarrierTextCallbackInfo(
-                displayText,
-                carrierNames,
-                !allSimsMissing,
-                subsIds,
-                airplaneMode);
-        postToCallback(info);
-    }
-
-    @VisibleForTesting
-    protected void postToCallback(CarrierTextCallbackInfo info) {
-        final CarrierTextCallback callback = mCarrierTextCallback;
-        if (callback != null) {
-            mMainHandler.post(() -> callback.updateCarrierInfo(info));
-        }
-    }
-
-    private Context getContext() {
-        return mContext;
-    }
 
-    private String getMissingSimMessage() {
-        return mShowMissingSim && mTelephonyCapable
-                ? getContext().getString(R.string.keyguard_missing_sim_message_short) : "";
-    }
-
-    private String getAirplaneModeMessage() {
-        return mShowAirplaneMode
-                ? getContext().getString(R.string.airplane_mode) : "";
-    }
-
-    /**
-     * Top-level function for creating carrier text. Makes text based on simState, PLMN
-     * and SPN as well as device capabilities, such as being emergency call capable.
-     *
-     * @return Carrier text if not in missing state, null otherwise.
-     */
-    private CharSequence getCarrierTextForSimState(int simState, CharSequence text) {
-        CharSequence carrierText = null;
-        CarrierTextController.StatusMode status = getStatusForIccState(simState);
-        switch (status) {
-            case Normal:
-                carrierText = text;
-                break;
-
-            case SimNotReady:
-                // Null is reserved for denoting missing, in this case we have nothing to display.
-                carrierText = ""; // nothing to display yet.
-                break;
-
-            case NetworkLocked:
-                carrierText = makeCarrierStringOnEmergencyCapable(
-                        mContext.getText(R.string.keyguard_network_locked_message), text);
-                break;
-
-            case SimMissing:
-                carrierText = null;
-                break;
-
-            case SimPermDisabled:
-                carrierText = makeCarrierStringOnEmergencyCapable(
-                        getContext().getText(
-                                R.string.keyguard_permanent_disabled_sim_message_short),
-                        text);
-                break;
-
-            case SimMissingLocked:
-                carrierText = null;
-                break;
-
-            case SimLocked:
-                carrierText = makeCarrierStringOnLocked(
-                        getContext().getText(R.string.keyguard_sim_locked_message),
-                        text);
-                break;
-
-            case SimPukLocked:
-                carrierText = makeCarrierStringOnLocked(
-                        getContext().getText(R.string.keyguard_sim_puk_locked_message),
-                        text);
-                break;
-            case SimIoError:
-                carrierText = makeCarrierStringOnEmergencyCapable(
-                        getContext().getText(R.string.keyguard_sim_error_message_short),
-                        text);
-                break;
-            case SimUnknown:
-                carrierText = null;
-                break;
-        }
-
-        return carrierText;
-    }
-
-    /*
-     * Add emergencyCallMessage to carrier string only if phone supports emergency calls.
-     */
-    private CharSequence makeCarrierStringOnEmergencyCapable(
-            CharSequence simMessage, CharSequence emergencyCallMessage) {
-        if (mIsEmergencyCallCapable) {
-            return concatenate(simMessage, emergencyCallMessage, mSeparator);
-        }
-        return simMessage;
-    }
-
-    /*
-     * Add "SIM card is locked" in parenthesis after carrier name, so it is easily associated in
-     * DSDS
-     */
-    private CharSequence makeCarrierStringOnLocked(CharSequence simMessage,
-            CharSequence carrierName) {
-        final boolean simMessageValid = !TextUtils.isEmpty(simMessage);
-        final boolean carrierNameValid = !TextUtils.isEmpty(carrierName);
-        if (simMessageValid && carrierNameValid) {
-            return mContext.getString(R.string.keyguard_carrier_name_with_sim_locked_template,
-                    carrierName, simMessage);
-        } else if (simMessageValid) {
-            return simMessage;
-        } else if (carrierNameValid) {
-            return carrierName;
-        } else {
-            return "";
-        }
-    }
-
-    /**
-     * Determine the current status of the lock screen given the SIM state and other stuff.
-     */
-    private CarrierTextController.StatusMode getStatusForIccState(int simState) {
-        final boolean missingAndNotProvisioned =
-                !mKeyguardUpdateMonitor.isDeviceProvisioned()
-                        && (simState == TelephonyManager.SIM_STATE_ABSENT
-                        || simState == TelephonyManager.SIM_STATE_PERM_DISABLED);
-
-        // Assume we're NETWORK_LOCKED if not provisioned
-        simState = missingAndNotProvisioned ? TelephonyManager.SIM_STATE_NETWORK_LOCKED : simState;
-        switch (simState) {
-            case TelephonyManager.SIM_STATE_ABSENT:
-                return CarrierTextController.StatusMode.SimMissing;
-            case TelephonyManager.SIM_STATE_NETWORK_LOCKED:
-                return CarrierTextController.StatusMode.SimMissingLocked;
-            case TelephonyManager.SIM_STATE_NOT_READY:
-                return CarrierTextController.StatusMode.SimNotReady;
-            case TelephonyManager.SIM_STATE_PIN_REQUIRED:
-                return CarrierTextController.StatusMode.SimLocked;
-            case TelephonyManager.SIM_STATE_PUK_REQUIRED:
-                return CarrierTextController.StatusMode.SimPukLocked;
-            case TelephonyManager.SIM_STATE_READY:
-                return CarrierTextController.StatusMode.Normal;
-            case TelephonyManager.SIM_STATE_PERM_DISABLED:
-                return CarrierTextController.StatusMode.SimPermDisabled;
-            case TelephonyManager.SIM_STATE_UNKNOWN:
-                return CarrierTextController.StatusMode.SimUnknown;
-            case TelephonyManager.SIM_STATE_CARD_IO_ERROR:
-                return CarrierTextController.StatusMode.SimIoError;
-        }
-        return CarrierTextController.StatusMode.SimUnknown;
-    }
-
-    private static CharSequence concatenate(CharSequence plmn, CharSequence spn,
-            CharSequence separator) {
-        final boolean plmnValid = !TextUtils.isEmpty(plmn);
-        final boolean spnValid = !TextUtils.isEmpty(spn);
-        if (plmnValid && spnValid) {
-            return new StringBuilder().append(plmn).append(separator).append(spn).toString();
-        } else if (plmnValid) {
-            return plmn;
-        } else if (spnValid) {
-            return spn;
-        } else {
-            return "";
-        }
-    }
-
-    /**
-     * Joins the strings in a sequence using a separator. Empty strings are discarded with no extra
-     * separator added so there are no extra separators that are not needed.
-     */
-    private static CharSequence joinNotEmpty(CharSequence separator, CharSequence[] sequences) {
-        int length = sequences.length;
-        if (length == 0) return "";
-        StringBuilder sb = new StringBuilder();
-        for (int i = 0; i < length; i++) {
-            if (!TextUtils.isEmpty(sequences[i])) {
-                if (!TextUtils.isEmpty(sb)) {
-                    sb.append(separator);
+                @Override
+                public void finishedWakingUp() {
+                    mView.setSelected(true);
                 }
-                sb.append(sequences[i]);
-            }
-        }
-        return sb.toString();
-    }
-
-    private static List<CharSequence> append(List<CharSequence> list, CharSequence string) {
-        if (!TextUtils.isEmpty(string)) {
-            list.add(string);
-        }
-        return list;
-    }
-
-    private CharSequence getCarrierHelpTextForSimState(int simState,
-            String plmn, String spn) {
-        int carrierHelpTextId = 0;
-        CarrierTextController.StatusMode status = getStatusForIccState(simState);
-        switch (status) {
-            case NetworkLocked:
-                carrierHelpTextId = R.string.keyguard_instructions_when_pattern_disabled;
-                break;
-
-            case SimMissing:
-                carrierHelpTextId = R.string.keyguard_missing_sim_instructions_long;
-                break;
-
-            case SimPermDisabled:
-                carrierHelpTextId = R.string.keyguard_permanent_disabled_sim_instructions;
-                break;
-
-            case SimMissingLocked:
-                carrierHelpTextId = R.string.keyguard_missing_sim_instructions;
-                break;
+            };
 
-            case Normal:
-            case SimLocked:
-            case SimPukLocked:
-                break;
-        }
+    @Inject
+    public CarrierTextController(CarrierText view,
+            CarrierTextManager.Builder carrierTextManagerBuilder,
+            KeyguardUpdateMonitor keyguardUpdateMonitor) {
+        super(view);
 
-        return mContext.getText(carrierHelpTextId);
+        mCarrierTextManager = carrierTextManagerBuilder
+                .setShowAirplaneMode(mView.getShowAirplaneMode())
+                .setShowMissingSim(mView.getShowMissingSim())
+                .build();
+        mKeyguardUpdateMonitor = keyguardUpdateMonitor;
     }
 
-    public static class Builder {
-        private final Context mContext;
-        private final String mSeparator;
-        private boolean mShowAirplaneMode;
-        private boolean mShowMissingSim;
-
-        @Inject
-        public Builder(Context context, @Main Resources resources) {
-            mContext = context;
-            mSeparator = resources.getString(
-                    com.android.internal.R.string.kg_text_message_separator);
-        }
-
-
-        public Builder setShowAirplaneMode(boolean showAirplaneMode) {
-            mShowAirplaneMode = showAirplaneMode;
-            return this;
-        }
-
-        public Builder setShowMissingSim(boolean showMissingSim) {
-            mShowMissingSim = showMissingSim;
-            return this;
-        }
-
-        public CarrierTextController build() {
-            return new CarrierTextController(
-                    mContext, mSeparator, mShowAirplaneMode, mShowMissingSim);
-        }
+    @Override
+    protected void onInit() {
+        super.onInit();
+        mView.setSelected(mKeyguardUpdateMonitor.isDeviceInteractive());
     }
-    /**
-     * Data structure for passing information to CarrierTextController subscribers
-     */
-    public static final class CarrierTextCallbackInfo {
-        public final CharSequence carrierText;
-        public final CharSequence[] listOfCarriers;
-        public final boolean anySimReady;
-        public final int[] subscriptionIds;
-        public boolean airplaneMode;
-
-        @VisibleForTesting
-        public CarrierTextCallbackInfo(CharSequence carrierText, CharSequence[] listOfCarriers,
-                boolean anySimReady, int[] subscriptionIds) {
-            this(carrierText, listOfCarriers, anySimReady, subscriptionIds, false);
-        }
 
-        @VisibleForTesting
-        public CarrierTextCallbackInfo(CharSequence carrierText, CharSequence[] listOfCarriers,
-                boolean anySimReady, int[] subscriptionIds, boolean airplaneMode) {
-            this.carrierText = carrierText;
-            this.listOfCarriers = listOfCarriers;
-            this.anySimReady = anySimReady;
-            this.subscriptionIds = subscriptionIds;
-            this.airplaneMode = airplaneMode;
-        }
+    @Override
+    protected void onViewAttached() {
+        mCarrierTextManager.setListening(mCarrierTextCallback);
     }
 
-    /**
-     * Callback to communicate to Views
-     */
-    public interface CarrierTextCallback {
-        /**
-         * Provides updated carrier information.
-         */
-        default void updateCarrierInfo(CarrierTextCallbackInfo info) {};
-
-        /**
-         * Notifies the View that the device is going to sleep
-         */
-        default void startedGoingToSleep() {};
-
-        /**
-         * Notifies the View that the device finished waking up
-         */
-        default void finishedWakingUp() {};
+    @Override
+    protected void onViewDetached() {
+        mCarrierTextManager.setListening(null);
     }
 }