Add keyguard shortcut for opening QS user panel

 - Introduce config_keyguard_user_switch_opens_qs_details. When set to
   true, the user icon that appears when config_keyguardUserSwitcher=true
   will open the "user" QS panel instead of taking over the keyguard

 - Add user icon positioning calculation to
   KeyguardClockPositionAlgorithm

 - Add option to QS DetailAdapter for turning off the circular reveal
   animation

 - Add callback to QS DetailAdapter for when "Done" button is pressed

 - Fix typo: showDetailDapater -> showDetailAdapter

Test: Manual
Bug: 169783558
Change-Id: I50133feaf02ca0990c40aa9d8a046abd95ea9d4e

18 files changed, 673 insertions, 76 deletions

diff --git a/packages/SystemUI/plugin/src/com/android/systemui/plugins/qs/DetailAdapter.java b/packages/SystemUI/plugin/src/com/android/systemui/plugins/qs/DetailAdapter.java
index d43aaf07c6be..beee03b52579 100644
--- a/packages/SystemUI/plugin/src/com/android/systemui/plugins/qs/DetailAdapter.java
+++ b/packages/SystemUI/plugin/src/com/android/systemui/plugins/qs/DetailAdapter.java
@@ -46,6 +46,21 @@ public interface DetailAdapter {
         return true;
     }
 
+    /**
+     * @return if detail panel should animate when shown or closed
+     */
+    default boolean shouldAnimate() {
+        return true;
+    }
+
+    /**
+     * @return true if the callback handled the event and wants to keep the detail panel open, false
+     * otherwise. Returning false will close the panel.
+     */
+    default boolean onDoneButtonClicked() {
+        return false;
+    }
+
     default UiEventLogger.UiEventEnum openDetailEvent() {
         return INVALID;
     }
diff --git a/packages/SystemUI/res/layout/keyguard_qs_user_switch.xml b/packages/SystemUI/res/layout/keyguard_qs_user_switch.xml
new file mode 100644
index 000000000000..3938b73d08ff
--- /dev/null
+++ b/packages/SystemUI/res/layout/keyguard_qs_user_switch.xml
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ 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
+  -->
+<!-- This is a view that shows a user switcher in Keyguard. -->
+<com.android.systemui.statusbar.phone.UserAvatarView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:systemui="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/keyguard_qs_user_switch_view"
+    android:layout_width="@dimen/kg_framed_avatar_size"
+    android:layout_height="@dimen/kg_framed_avatar_size"
+    android:layout_centerHorizontal="true"
+    android:layout_gravity="center_horizontal|bottom"
+    systemui:avatarPadding="0dp"
+    systemui:badgeDiameter="18dp"
+    systemui:badgeMargin="1dp"
+    systemui:frameColor="@color/kg_user_avatar_frame"
+    systemui:framePadding="0dp"
+    systemui:frameWidth="0dp">
+</com.android.systemui.statusbar.phone.UserAvatarView>
diff --git a/packages/SystemUI/res/layout/status_bar_expanded.xml b/packages/SystemUI/res/layout/status_bar_expanded.xml
index 859d9048cee3..67a933df6692 100644
--- a/packages/SystemUI/res/layout/status_bar_expanded.xml
+++ b/packages/SystemUI/res/layout/status_bar_expanded.xml
@@ -32,6 +32,12 @@
         android:visibility="gone" />
 
     <ViewStub
+        android:id="@+id/keyguard_qs_user_switch_stub"
+        android:layout="@layout/keyguard_qs_user_switch"
+        android:layout_height="match_parent"
+        android:layout_width="match_parent" />
+
+    <ViewStub
         android:id="@+id/keyguard_user_switcher_stub"
         android:layout="@layout/keyguard_user_switcher"
         android:layout_height="match_parent"
diff --git a/packages/SystemUI/res/values/config.xml b/packages/SystemUI/res/values/config.xml
index 61962256f93d..78927f8bf8d4 100644
--- a/packages/SystemUI/res/values/config.xml
+++ b/packages/SystemUI/res/values/config.xml
@@ -279,6 +279,11 @@
     <!-- Whether to show the full screen user switcher. -->
     <bool name="config_enableFullscreenUserSwitcher">false</bool>
 
+    <!-- Whether the multi-user switch on the keyguard opens QS user panel. If false, clicking the
+         user switch on the keyguard will replace the notifications and status area with the user
+         switcher. The multi-user switch is only shown if config_keyguardUserSwitcher=false. -->
+    <bool name="config_keyguard_user_switch_opens_qs_details">false</bool>
+
     <!-- SystemUIFactory component -->
     <string name="config_systemUIFactoryComponent" translatable="false">com.android.systemui.SystemUIFactory</string>
 
diff --git a/packages/SystemUI/res/values/dimens.xml b/packages/SystemUI/res/values/dimens.xml
index 594fbdf55d3c..0d92aea6ed6f 100644
--- a/packages/SystemUI/res/values/dimens.xml
+++ b/packages/SystemUI/res/values/dimens.xml
@@ -802,7 +802,7 @@
     <!-- Size of user icon + frame in the qs user picker (incl. frame) -->
     <dimen name="qs_framed_avatar_size">54dp</dimen>
     <!-- Size of user icon + frame in the keyguard user picker (incl. frame) -->
-    <dimen name="kg_framed_avatar_size">32dp</dimen>
+    <dimen name="kg_framed_avatar_size">48dp</dimen>
 
     <!-- Margin on the left side of the carrier text on Keyguard -->
     <dimen name="keyguard_carrier_text_margin">16dp</dimen>
diff --git a/packages/SystemUI/src/com/android/keyguard/dagger/KeyguardQsUserSwitchComponent.java b/packages/SystemUI/src/com/android/keyguard/dagger/KeyguardQsUserSwitchComponent.java
new file mode 100644
index 000000000000..3a0357d2a284
--- /dev/null
+++ b/packages/SystemUI/src/com/android/keyguard/dagger/KeyguardQsUserSwitchComponent.java
@@ -0,0 +1,40 @@
+/*
+ * 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.keyguard.dagger;
+
+import com.android.systemui.statusbar.phone.UserAvatarView;
+import com.android.systemui.statusbar.policy.KeyguardQsUserSwitchController;
+
+import dagger.BindsInstance;
+import dagger.Subcomponent;
+
+/**
+ * Subcomponent for helping work with KeyguardQsUserSwitch and its children.
+ */
+@Subcomponent(modules = {KeyguardUserSwitcherModule.class})
+@KeyguardUserSwitcherScope
+public interface KeyguardQsUserSwitchComponent {
+    /** Simple factory for {@link KeyguardUserSwitcherComponent}. */
+    @Subcomponent.Factory
+    interface Factory {
+        KeyguardQsUserSwitchComponent build(
+                @BindsInstance UserAvatarView userAvatarView);
+    }
+
+    /** Builds a {@link KeyguardQsUserSwitchController}. */
+    KeyguardQsUserSwitchController getKeyguardQsUserSwitchController();
+}
diff --git a/packages/SystemUI/src/com/android/systemui/keyguard/dagger/KeyguardModule.java b/packages/SystemUI/src/com/android/systemui/keyguard/dagger/KeyguardModule.java
index 9e5b225fbefc..de2e7c476e18 100644
--- a/packages/SystemUI/src/com/android/systemui/keyguard/dagger/KeyguardModule.java
+++ b/packages/SystemUI/src/com/android/systemui/keyguard/dagger/KeyguardModule.java
@@ -29,6 +29,7 @@ import com.android.internal.widget.LockPatternUtils;
 import com.android.keyguard.KeyguardDisplayManager;
 import com.android.keyguard.KeyguardUpdateMonitor;
 import com.android.keyguard.KeyguardViewController;
+import com.android.keyguard.dagger.KeyguardQsUserSwitchComponent;
 import com.android.keyguard.dagger.KeyguardStatusViewComponent;
 import com.android.keyguard.dagger.KeyguardUserSwitcherComponent;
 import com.android.systemui.broadcast.BroadcastDispatcher;
@@ -62,7 +63,8 @@ import dagger.Provides;
 /**
  * Dagger Module providing {@link StatusBar}.
  */
-@Module(subcomponents = {KeyguardStatusViewComponent.class, KeyguardUserSwitcherComponent.class},
+@Module(subcomponents = {KeyguardStatusViewComponent.class,
+        KeyguardQsUserSwitchComponent.class, KeyguardUserSwitcherComponent.class},
         includes = {FalsingModule.class})
 public class KeyguardModule {
     /**
diff --git a/packages/SystemUI/src/com/android/systemui/qs/QSDetail.java b/packages/SystemUI/src/com/android/systemui/qs/QSDetail.java
index 619729e55314..9967936ac1bd 100644
--- a/packages/SystemUI/src/com/android/systemui/qs/QSDetail.java
+++ b/packages/SystemUI/src/com/android/systemui/qs/QSDetail.java
@@ -72,6 +72,7 @@ public class QSDetail extends LinearLayout {
     private boolean mFullyExpanded;
     private QuickStatusBarHeader mHeader;
     private boolean mTriggeredExpand;
+    private boolean mShouldAnimate;
     private int mOpenX;
     private int mOpenY;
     private boolean mAnimatingOpen;
@@ -108,16 +109,6 @@ public class QSDetail extends LinearLayout {
         updateDetailText();
 
         mClipper = new QSDetailClipper(this);
-
-        final OnClickListener doneListener = new OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                announceForAccessibility(
-                        mContext.getString(R.string.accessibility_desc_quick_settings));
-                mQsPanelController.closeDetail();
-            }
-        };
-        mDetailDoneButton.setOnClickListener(doneListener);
     }
 
     /** */
@@ -169,6 +160,7 @@ public class QSDetail extends LinearLayout {
     public void handleShowingDetail(final DetailAdapter adapter, int x, int y,
             boolean toggleQs) {
         final boolean showingDetail = adapter != null;
+        final boolean wasShowingDetail = mDetailAdapter != null;
         setClickable(showingDetail);
         if (showingDetail) {
             setupDetailHeader(adapter);
@@ -178,6 +170,7 @@ public class QSDetail extends LinearLayout {
             } else {
                 mTriggeredExpand = false;
             }
+            mShouldAnimate = adapter.shouldAnimate();
             mOpenX = x;
             mOpenY = y;
         } else {
@@ -190,10 +183,10 @@ public class QSDetail extends LinearLayout {
             }
         }
 
-        boolean visibleDiff = (mDetailAdapter != null) != (adapter != null);
-        if (!visibleDiff && mDetailAdapter == adapter) return;  // already in right state
-        AnimatorListener listener = null;
-        if (adapter != null) {
+        boolean visibleDiff = wasShowingDetail != showingDetail;
+        if (!visibleDiff && !wasShowingDetail) return;  // already in right state
+        AnimatorListener listener;
+        if (showingDetail) {
             int viewCacheIndex = adapter.getMetricsCategory();
             View detailView = adapter.createDetailView(mContext, mDetailViews.get(viewCacheIndex),
                     mDetailContent);
@@ -213,7 +206,7 @@ public class QSDetail extends LinearLayout {
             listener = mHideGridContentWhenDone;
             setVisibility(View.VISIBLE);
         } else {
-            if (mDetailAdapter != null) {
+            if (wasShowingDetail) {
                 Dependency.get(MetricsLogger.class).hidden(mDetailAdapter.getMetricsCategory());
                 mUiEventLogger.log(mDetailAdapter.closeDetailEvent());
             }
@@ -227,7 +220,15 @@ public class QSDetail extends LinearLayout {
         }
         sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
 
-        animateDetailVisibleDiff(x, y, visibleDiff, listener);
+        if (mShouldAnimate) {
+            animateDetailVisibleDiff(x, y, visibleDiff, listener);
+        } else {
+            if (showingDetail) {
+                showImmediately();
+            } else {
+                hideImmediately();
+            }
+        }
     }
 
     protected void animateDetailVisibleDiff(int x, int y, boolean visibleDiff, AnimatorListener listener) {
@@ -245,6 +246,17 @@ public class QSDetail extends LinearLayout {
         }
     }
 
+    void showImmediately() {
+        setVisibility(VISIBLE);
+        mClipper.cancelAnimator();
+        mClipper.showBackground();
+    }
+
+    public void hideImmediately() {
+        mClipper.cancelAnimator();
+        setVisibility(View.GONE);
+    }
+
     protected void setupDetailFooter(DetailAdapter adapter) {
         final Intent settingsIntent = adapter.getSettingsIntent();
         mDetailSettingsButton.setVisibility(settingsIntent != null ? VISIBLE : GONE);
@@ -255,6 +267,13 @@ public class QSDetail extends LinearLayout {
             Dependency.get(ActivityStarter.class)
                     .postStartActivityDismissingKeyguard(settingsIntent, 0);
         });
+        mDetailDoneButton.setOnClickListener(v -> {
+            announceForAccessibility(
+                    mContext.getString(R.string.accessibility_desc_quick_settings));
+            if (!adapter.onDoneButtonClicked()) {
+                mQsPanelController.closeDetail();
+            }
+        });
     }
 
     protected void setupDetailHeader(final DetailAdapter adapter) {
diff --git a/packages/SystemUI/src/com/android/systemui/qs/QSDetailDisplayer.java b/packages/SystemUI/src/com/android/systemui/qs/QSDetailDisplayer.java
index 7d87e174d95d..b50af004aff9 100644
--- a/packages/SystemUI/src/com/android/systemui/qs/QSDetailDisplayer.java
+++ b/packages/SystemUI/src/com/android/systemui/qs/QSDetailDisplayer.java
@@ -39,7 +39,7 @@ public class QSDetailDisplayer {
     /** Show the supplied DetailAdapter in the Quick Settings. */
     public void showDetailAdapter(DetailAdapter detailAdapter, int x, int y) {
         if (mQsPanelController != null) {
-            mQsPanelController.showDetailDapater(detailAdapter, x, y);
+            mQsPanelController.showDetailAdapter(detailAdapter, x, y);
         }
     }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/qs/QSPanelController.java b/packages/SystemUI/src/com/android/systemui/qs/QSPanelController.java
index 782092161418..fcb35e2040ea 100644
--- a/packages/SystemUI/src/com/android/systemui/qs/QSPanelController.java
+++ b/packages/SystemUI/src/com/android/systemui/qs/QSPanelController.java
@@ -311,7 +311,7 @@ public class QSPanelController extends QSPanelControllerBase<QSPanel> {
     }
 
     /** */
-    public void showDetailDapater(DetailAdapter detailAdapter, int x, int y) {
+    public void showDetailAdapter(DetailAdapter detailAdapter, int x, int y) {
         mView.showDetailAdapter(true, detailAdapter, new int[]{x, y});
     }
 
diff --git a/packages/SystemUI/src/com/android/systemui/qs/tiles/UserTile.java b/packages/SystemUI/src/com/android/systemui/qs/tiles/UserTile.java
index 26adfdcd8539..a6cddd3367d3 100644
--- a/packages/SystemUI/src/com/android/systemui/qs/tiles/UserTile.java
+++ b/packages/SystemUI/src/com/android/systemui/qs/tiles/UserTile.java
@@ -82,7 +82,7 @@ public class UserTile extends QSTileImpl<State> implements UserInfoController.On
 
     @Override
     public DetailAdapter getDetailAdapter() {
-        return mUserSwitcherController.userDetailAdapter;
+        return mUserSwitcherController.mUserDetailAdapter;
     }
 
     @Override
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardClockPositionAlgorithm.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardClockPositionAlgorithm.java
index e0df4f8bfea9..a6daed5a0850 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardClockPositionAlgorithm.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardClockPositionAlgorithm.java
@@ -56,10 +56,12 @@ public class KeyguardClockPositionAlgorithm {
     private int mKeyguardStatusHeight;
 
     /**
-     * Height of {@link KeyguardUserSwitcherListView} when it
-     * is closed and only the current user's icon is visible.
+     * Height of user avatar used by the multi-user switcher. This could either be the
+     * {@link KeyguardUserSwitcherListView} when it is closed and only the current user's icon is
+     * visible, or it could be height of the avatar used by the
+     * {@link com.android.systemui.statusbar.policy.KeyguardQsUserSwitchController}.
      */
-    private int mKeyguardUserSwitcherHeight;
+    private int mUserSwitchHeight;
 
     /**
      * Preferred Y position of clock.
@@ -67,6 +69,11 @@ public class KeyguardClockPositionAlgorithm {
     private int mClockPreferredY;
 
     /**
+     * Preferred Y position of user avatar used by the multi-user switcher.
+     */
+    private int mUserSwitchPreferredY;
+
+    /**
      * Whether or not there is a custom clock face on keyguard.
      */
     private boolean mHasCustomClock;
@@ -181,20 +188,21 @@ public class KeyguardClockPositionAlgorithm {
      */
     public void setup(int statusBarMinHeight, int maxShadeBottom, int notificationStackHeight,
             float panelExpansion, int parentHeight, int keyguardStatusHeight,
-            int keyguardUserSwitcherHeight, int clockPreferredY, boolean hasCustomClock,
-            boolean hasVisibleNotifs, float dark, float emptyDragAmount, boolean bypassEnabled,
-            int unlockedStackScrollerPadding, boolean showLockIcon, float qsExpansion,
-            int cutoutTopInset) {
+            int userSwitchHeight, int clockPreferredY, int userSwitchPreferredY,
+            boolean hasCustomClock, boolean hasVisibleNotifs, float dark, float emptyDragAmount,
+            boolean bypassEnabled, int unlockedStackScrollerPadding, boolean showLockIcon,
+            float qsExpansion, int cutoutTopInset) {
         mMinTopMargin = statusBarMinHeight + (showLockIcon
                 ? mContainerTopPaddingWithLockIcon : mContainerTopPaddingWithoutLockIcon)
-                + keyguardUserSwitcherHeight;
+                + userSwitchHeight;
         mMaxShadeBottom = maxShadeBottom;
         mNotificationStackHeight = notificationStackHeight;
         mPanelExpansion = panelExpansion;
         mHeight = parentHeight;
         mKeyguardStatusHeight = keyguardStatusHeight;
-        mKeyguardUserSwitcherHeight = keyguardUserSwitcherHeight;
+        mUserSwitchHeight = userSwitchHeight;
         mClockPreferredY = clockPreferredY;
+        mUserSwitchPreferredY = userSwitchPreferredY;
         mHasCustomClock = hasCustomClock;
         mHasVisibleNotifs = hasVisibleNotifs;
         mDarkAmount = dark;
@@ -208,6 +216,7 @@ public class KeyguardClockPositionAlgorithm {
     public void run(Result result) {
         final int y = getClockY(mPanelExpansion, mDarkAmount);
         result.clockY = y;
+        result.userSwitchY = getUserSwitcherY(mPanelExpansion);
         result.clockYFullyDozing = getClockY(
                 1.0f /* panelExpansion */, 1.0f /* darkAmount */);
         result.clockAlpha = getClockAlpha(y);
@@ -241,7 +250,7 @@ public class KeyguardClockPositionAlgorithm {
 
     private int getExpandedPreferredClockY() {
         if (mLockScreenMode != KeyguardUpdateMonitor.LOCK_SCREEN_MODE_NORMAL) {
-            return mMinTopMargin;
+            return mMinTopMargin + mUserSwitchHeight;
         }
         return (mHasCustomClock && (!mHasVisibleNotifs || mBypassEnabled)) ? getPreferredClockY()
                 : getExpandedClockPosition();
@@ -257,7 +266,7 @@ public class KeyguardClockPositionAlgorithm {
         final int containerCenter = mMinTopMargin + availableHeight / 2;
 
         float y = containerCenter
-                - (mKeyguardStatusHeight + mKeyguardUserSwitcherHeight) * CLOCK_HEIGHT_WEIGHT
+                - (mKeyguardStatusHeight + mUserSwitchHeight) * CLOCK_HEIGHT_WEIGHT
                 - mClockNotificationsMargin - mNotificationStackHeight / 2;
         if (y < mMinTopMargin) {
             y = mMinTopMargin;
@@ -299,6 +308,17 @@ public class KeyguardClockPositionAlgorithm {
         return (int) (MathUtils.lerp(clockY, clockYDark, darkAmount) + mEmptyDragAmount);
     }
 
+    private int getUserSwitcherY(float panelExpansion) {
+        float userSwitchYRegular = mUserSwitchPreferredY;
+        float userSwitchYBouncer = -mKeyguardStatusHeight - mUserSwitchHeight;
+
+        // Move user-switch up while collapsing the shade
+        float shadeExpansion = Interpolators.FAST_OUT_LINEAR_IN.getInterpolation(panelExpansion);
+        float userSwitchY = MathUtils.lerp(userSwitchYBouncer, userSwitchYRegular, shadeExpansion);
+
+        return (int) (userSwitchY + mEmptyDragAmount);
+    }
+
     /**
      * We might want to fade out the clock when the user is swiping up.
      * One exception is when the bouncer will become visible, in this cause the clock
@@ -341,6 +361,11 @@ public class KeyguardClockPositionAlgorithm {
         public int clockY;
 
         /**
+         * The y translation of the multi-user switch.
+         */
+        public int userSwitchY;
+
+        /**
          * The y translation of the clock when we're fully dozing.
          */
         public int clockYFullyDozing;
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/MultiUserSwitch.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/MultiUserSwitch.java
index d9cb9ce21330..16f36b7b6b7e 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/MultiUserSwitch.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/MultiUserSwitch.java
@@ -168,6 +168,6 @@ public class MultiUserSwitch extends FrameLayout implements View.OnClickListener
     }
 
     protected DetailAdapter getUserDetailAdapter() {
-        return mUserSwitcherController.userDetailAdapter;
+        return mUserSwitcherController.mUserDetailAdapter;
     }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelViewController.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelViewController.java
index 3b09eda4003e..738ac4d18c62 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelViewController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelViewController.java
@@ -77,6 +77,7 @@ import com.android.keyguard.KeyguardStatusView;
 import com.android.keyguard.KeyguardStatusViewController;
 import com.android.keyguard.KeyguardUpdateMonitor;
 import com.android.keyguard.KeyguardUpdateMonitorCallback;
+import com.android.keyguard.dagger.KeyguardQsUserSwitchComponent;
 import com.android.keyguard.dagger.KeyguardStatusViewComponent;
 import com.android.keyguard.dagger.KeyguardUserSwitcherComponent;
 import com.android.systemui.DejankUtils;
@@ -95,9 +96,11 @@ import com.android.systemui.fragments.FragmentHostManager.FragmentListener;
 import com.android.systemui.media.MediaDataManager;
 import com.android.systemui.media.MediaHierarchyManager;
 import com.android.systemui.plugins.FalsingManager;
+import com.android.systemui.plugins.qs.DetailAdapter;
 import com.android.systemui.plugins.qs.QS;
 import com.android.systemui.plugins.statusbar.StatusBarStateController;
 import com.android.systemui.plugins.statusbar.StatusBarStateController.StateListener;
+import com.android.systemui.qs.QSDetailDisplayer;
 import com.android.systemui.statusbar.CommandQueue;
 import com.android.systemui.statusbar.FeatureFlags;
 import com.android.systemui.statusbar.GestureRecorder;
@@ -133,6 +136,7 @@ import com.android.systemui.statusbar.notification.stack.StackStateAnimator;
 import com.android.systemui.statusbar.phone.LockscreenGestureLogger.LockscreenUiEvent;
 import com.android.systemui.statusbar.phone.dagger.StatusBarComponent;
 import com.android.systemui.statusbar.policy.ConfigurationController;
+import com.android.systemui.statusbar.policy.KeyguardQsUserSwitchController;
 import com.android.systemui.statusbar.policy.KeyguardStateController;
 import com.android.systemui.statusbar.policy.KeyguardUserSwitcherController;
 import com.android.systemui.statusbar.policy.KeyguardUserSwitcherView;
@@ -292,14 +296,13 @@ public class NotificationPanelViewController extends PanelViewController {
             new KeyguardUserSwitcherController.KeyguardUserSwitcherListener() {
                 @Override
                 public void onKeyguardUserSwitcherChanged(boolean open) {
-                    if (mKeyguardUserSwitcherController != null
-                            && mKeyguardUserSwitcherController.isSimpleUserSwitcher()) {
-                        return;
+                    if (mKeyguardUserSwitcherController == null) {
+                        updateUserSwitcherVisibility(false);
+                    } else if (!mKeyguardUserSwitcherController.isSimpleUserSwitcher()) {
+                        updateUserSwitcherVisibility(open
+                                && mKeyguardStateController.isShowing()
+                                && !mKeyguardStateController.isKeyguardFadingAway());
                     }
-
-                    updateUserSwitcherVisibility(open
-                            && mKeyguardStateController.isShowing()
-                            && !mKeyguardStateController.isKeyguardFadingAway());
                 }
             };
 
@@ -315,7 +318,9 @@ public class NotificationPanelViewController extends PanelViewController {
     private final MediaHierarchyManager mMediaHierarchyManager;
     private final StatusBarKeyguardViewManager mStatusBarKeyguardViewManager;
     private final KeyguardStatusViewComponent.Factory mKeyguardStatusViewComponentFactory;
+    private final KeyguardQsUserSwitchComponent.Factory mKeyguardQsUserSwitchComponentFactory;
     private final KeyguardUserSwitcherComponent.Factory mKeyguardUserSwitcherComponentFactory;
+    private final QSDetailDisplayer mQSDetailDisplayer;
     private final FeatureFlags mFeatureFlags;
     private final ScrimController mScrimController;
     private final ControlsComponent mControlsComponent;
@@ -327,6 +332,8 @@ public class NotificationPanelViewController extends PanelViewController {
     private int mMaxAllowedKeyguardNotifications;
 
     private KeyguardAffordanceHelper mAffordanceHelper;
+    private KeyguardQsUserSwitchController mKeyguardQsUserSwitchController;
+    private boolean mKeyguardUserSwitcherIsShowing;
     private KeyguardUserSwitcherController mKeyguardUserSwitcherController;
     private KeyguardStatusBarView mKeyguardStatusBar;
     private ViewGroup mBigClockContainer;
@@ -352,6 +359,7 @@ public class NotificationPanelViewController extends PanelViewController {
     private boolean mQsExpandedWhenExpandingStarted;
     private boolean mQsFullyExpanded;
     private boolean mKeyguardShowing;
+    private boolean mKeyguardQsUserSwitchEnabled;
     private boolean mKeyguardUserSwitcherEnabled;
     private boolean mDozing;
     private boolean mDozingOnDown;
@@ -578,7 +586,9 @@ public class NotificationPanelViewController extends PanelViewController {
             StatusBarKeyguardViewManager statusBarKeyguardViewManager,
             NotificationStackScrollLayoutController notificationStackScrollLayoutController,
             KeyguardStatusViewComponent.Factory keyguardStatusViewComponentFactory,
+            KeyguardQsUserSwitchComponent.Factory keyguardQsUserSwitchComponentFactory,
             KeyguardUserSwitcherComponent.Factory keyguardUserSwitcherComponentFactory,
+            QSDetailDisplayer qsDetailDisplayer,
             NotificationGroupManagerLegacy groupManager,
             NotificationIconAreaController notificationIconAreaController,
             AuthController authController,
@@ -605,9 +615,14 @@ public class NotificationPanelViewController extends PanelViewController {
         mNotificationIconAreaController = notificationIconAreaController;
         mKeyguardStatusViewComponentFactory = keyguardStatusViewComponentFactory;
         mFeatureFlags = featureFlags;
+        mKeyguardQsUserSwitchComponentFactory = keyguardQsUserSwitchComponentFactory;
         mKeyguardUserSwitcherComponentFactory = keyguardUserSwitcherComponentFactory;
+        mQSDetailDisplayer = qsDetailDisplayer;
         mKeyguardUserSwitcherEnabled = mResources.getBoolean(
                 com.android.internal.R.bool.config_keyguardUserSwitcher);
+        mKeyguardQsUserSwitchEnabled =
+                mKeyguardUserSwitcherEnabled && mResources.getBoolean(
+                        R.bool.config_keyguard_user_switch_opens_qs_details);
         mView.setWillNotDraw(!DEBUG);
         mLayoutInflater = layoutInflater;
         mFalsingManager = falsingManager;
@@ -688,15 +703,21 @@ public class NotificationPanelViewController extends PanelViewController {
         mKeyguardStatusBar = mView.findViewById(R.id.keyguard_header);
         mBigClockContainer = mView.findViewById(R.id.big_clock_container);
 
+        UserAvatarView userAvatarView = null;
         KeyguardUserSwitcherView keyguardUserSwitcherView = null;
 
         if (mKeyguardUserSwitcherEnabled && mUserManager.isUserSwitcherEnabled()) {
-            ViewStub userSwitcherStub = mView.findViewById(R.id.keyguard_user_switcher_stub);
-            keyguardUserSwitcherView = (KeyguardUserSwitcherView) userSwitcherStub.inflate();
+            if (mKeyguardQsUserSwitchEnabled) {
+                ViewStub stub = mView.findViewById(R.id.keyguard_qs_user_switch_stub);
+                userAvatarView = (UserAvatarView) stub.inflate();
+            } else {
+                ViewStub stub = mView.findViewById(R.id.keyguard_user_switcher_stub);
+                keyguardUserSwitcherView = (KeyguardUserSwitcherView) stub.inflate();
+            }
         }
 
         updateViewControllers(mView.findViewById(R.id.keyguard_status_view),
-                keyguardUserSwitcherView);
+                userAvatarView, keyguardUserSwitcherView);
         mNotificationContainerParent = mView.findViewById(R.id.notification_container_parent);
         NotificationStackScrollLayout stackScrollLayout = mView.findViewById(
                 R.id.notification_stack_scroller);
@@ -770,7 +791,7 @@ public class NotificationPanelViewController extends PanelViewController {
     }
 
     private void updateViewControllers(KeyguardStatusView keyguardStatusView,
-            KeyguardUserSwitcherView keyguardUserSwitcherView) {
+            UserAvatarView userAvatarView, KeyguardUserSwitcherView keyguardUserSwitcherView) {
         // Re-associate the KeyguardStatusViewController
         KeyguardStatusViewComponent statusViewComponent =
                 mKeyguardStatusViewComponentFactory.build(keyguardStatusView);
@@ -789,18 +810,27 @@ public class NotificationPanelViewController extends PanelViewController {
             mKeyguardUserSwitcherController.removeCallback();
         }
 
+        mKeyguardQsUserSwitchController = null;
+        mKeyguardUserSwitcherController = null;
+
         // Re-associate the KeyguardUserSwitcherController
-        if (keyguardUserSwitcherView != null) {
+        if (userAvatarView != null) {
+            KeyguardQsUserSwitchComponent userSwitcherComponent =
+                    mKeyguardQsUserSwitchComponentFactory.build(userAvatarView);
+            mKeyguardQsUserSwitchController =
+                    userSwitcherComponent.getKeyguardQsUserSwitchController();
+            mKeyguardQsUserSwitchController.setNotificationPanelViewController(this);
+            mKeyguardQsUserSwitchController.init();
+            mKeyguardStatusBar.setKeyguardUserSwitcherEnabled(true);
+        } else if (keyguardUserSwitcherView != null) {
             KeyguardUserSwitcherComponent userSwitcherComponent =
                     mKeyguardUserSwitcherComponentFactory.build(keyguardUserSwitcherView);
-
             mKeyguardUserSwitcherController =
                     userSwitcherComponent.getKeyguardUserSwitcherController();
             mKeyguardUserSwitcherController.setCallback(mKeyguardUserSwitcherListener);
             mKeyguardUserSwitcherController.init();
             mKeyguardStatusBar.setKeyguardUserSwitcherEnabled(true);
         } else {
-            mKeyguardUserSwitcherController = null;
             mKeyguardStatusBar.setKeyguardUserSwitcherEnabled(false);
         }
     }
@@ -856,6 +886,25 @@ public class NotificationPanelViewController extends PanelViewController {
         }
     }
 
+    private View reInflateStub(int viewId, int stubId, int layoutId, boolean enabled) {
+        View view = mView.findViewById(viewId);
+        if (view != null) {
+            int index = mView.indexOfChild(view);
+            mView.removeView(view);
+            if (enabled) {
+                view = mLayoutInflater.inflate(layoutId, mView, false);
+                mView.addView(view, index);
+            } else {
+                view = null;
+            }
+        } else if (enabled) {
+            // It's possible the stub was never inflated if the configuration changed
+            ViewStub stub = mView.findViewById(stubId);
+            view = stub.inflate();
+        }
+        return view;
+    }
+
     private void reInflateViews() {
         if (DEBUG) Log.d(TAG, "reInflateViews");
         // Re-inflate the status view group.
@@ -867,26 +916,26 @@ public class NotificationPanelViewController extends PanelViewController {
         mView.addView(keyguardStatusView, index);
 
         // Re-inflate the keyguard user switcher group.
-        boolean showUserSwitcher =
-                mKeyguardUserSwitcherEnabled && mUserManager.isUserSwitcherEnabled();
-        KeyguardUserSwitcherView keyguardUserSwitcherView = mView.findViewById(
-                R.id.keyguard_user_switcher_view);
-        if (keyguardUserSwitcherView != null) {
-            index = mView.indexOfChild(keyguardUserSwitcherView);
-            mView.removeView(keyguardUserSwitcherView);
-            if (showUserSwitcher) {
-                keyguardUserSwitcherView = (KeyguardUserSwitcherView) mLayoutInflater.inflate(
-                        R.layout.keyguard_user_switcher, mView, false);
-                mView.addView(keyguardUserSwitcherView, index);
-            }
-        } else if (showUserSwitcher) {
-            // It's possible the user switcher was never inflated if the configuration changed
-            ViewStub userSwitcherStub = mView.findViewById(R.id.keyguard_user_switcher_stub);
-            keyguardUserSwitcherView = (KeyguardUserSwitcherView) userSwitcherStub.inflate();
-        }
+        boolean isUserSwitcherEnabled = mUserManager.isUserSwitcherEnabled();
+        boolean showQsUserSwitch = mKeyguardQsUserSwitchEnabled && isUserSwitcherEnabled;
+        boolean showKeyguardUserSwitcher =
+                !mKeyguardQsUserSwitchEnabled
+                        && mKeyguardUserSwitcherEnabled
+                        && isUserSwitcherEnabled;
+        UserAvatarView userAvatarView = (UserAvatarView) reInflateStub(
+                R.id.keyguard_qs_user_switch_view /* viewId */,
+                R.id.keyguard_qs_user_switch_stub /* stubId */,
+                R.layout.keyguard_qs_user_switch /* layoutId */,
+                showQsUserSwitch /* enabled */);
+        KeyguardUserSwitcherView keyguardUserSwitcherView =
+                (KeyguardUserSwitcherView) reInflateStub(
+                        R.id.keyguard_user_switcher_view /* viewId */,
+                        R.id.keyguard_user_switcher_stub /* stubId */,
+                        R.layout.keyguard_user_switcher /* layoutId */,
+                        showKeyguardUserSwitcher /* enabled */);
 
         mBigClockContainer.removeAllViews();
-        updateViewControllers(keyguardStatusView, keyguardUserSwitcherView);
+        updateViewControllers(keyguardStatusView, userAvatarView, keyguardUserSwitcherView);
 
         // Update keyguard bottom area
         index = mView.indexOfChild(mKeyguardBottomArea);
@@ -910,6 +959,13 @@ public class NotificationPanelViewController extends PanelViewController {
                 false,
                 false,
                 mBarState);
+        if (mKeyguardQsUserSwitchController != null) {
+            mKeyguardQsUserSwitchController.setKeyguardQsUserSwitchVisibility(
+                    mBarState,
+                    false,
+                    false,
+                    mBarState);
+        }
         if (mKeyguardUserSwitcherController != null) {
             mKeyguardUserSwitcherController.setKeyguardUserSwitcherVisibility(
                     mBarState,
@@ -1009,10 +1065,15 @@ public class NotificationPanelViewController extends PanelViewController {
             int totalHeight = mView.getHeight();
             int bottomPadding = Math.max(mIndicationBottomPadding, mAmbientIndicationBottomPadding);
             int clockPreferredY = mKeyguardStatusViewController.getClockPreferredY(totalHeight);
+            int userSwitcherPreferredY = mStatusBarMinHeight;
             boolean bypassEnabled = mKeyguardBypassController.getBypassEnabled();
             final boolean hasVisibleNotifications = mNotificationStackScrollLayoutController
                     .getVisibleNotificationCount() != 0 || mMediaDataManager.hasActiveMedia();
             mKeyguardStatusViewController.setHasVisibleNotifications(hasVisibleNotifications);
+            int userIconHeight = mKeyguardQsUserSwitchController != null
+                    ? mKeyguardQsUserSwitchController.getUserIconHeight()
+                    : (mKeyguardUserSwitcherController != null
+                            ? mKeyguardUserSwitcherController.getUserIconHeight() : 0);
             mClockPositionAlgorithm.setup(mStatusBarMinHeight, totalHeight - bottomPadding,
                     mNotificationStackScrollLayoutController.getIntrinsicContentHeight(),
                     getExpandedFraction(),
@@ -1021,9 +1082,8 @@ public class NotificationPanelViewController extends PanelViewController {
                             ? mKeyguardStatusViewController.getHeight()
                             : (int) (mKeyguardStatusViewController.getHeight()
                                     - mShelfHeight / 2.0f - mDarkIconSize / 2.0f),
-                    mKeyguardUserSwitcherController == null
-                            ? 0 : mKeyguardUserSwitcherController.getUserIconHeight(),
-                    clockPreferredY, hasCustomClock(),
+                    userIconHeight,
+                    clockPreferredY, userSwitcherPreferredY, hasCustomClock(),
                     hasVisibleNotifications, mInterpolatedDarkAmount, mEmptyDragAmount,
                     bypassEnabled, getUnlockedStackScrollerPadding(),
                     mUpdateMonitor.canShowLockIcon(),
@@ -1033,11 +1093,16 @@ public class NotificationPanelViewController extends PanelViewController {
             mKeyguardStatusViewController.updatePosition(
                     mClockPositionResult.clockX, mClockPositionResult.clockY,
                     mClockPositionResult.clockScale, animateClock);
+            if (mKeyguardQsUserSwitchController != null) {
+                mKeyguardQsUserSwitchController.updatePosition(
+                        mClockPositionResult.clockX,
+                        mClockPositionResult.userSwitchY,
+                        animateClock);
+            }
             if (mKeyguardUserSwitcherController != null) {
                 mKeyguardUserSwitcherController.updatePosition(
                         mClockPositionResult.clockX,
-                        mClockPositionResult.clockY
-                                - mKeyguardUserSwitcherController.getUserIconHeight(),
+                        mClockPositionResult.userSwitchY,
                         animateClock);
             }
             updateNotificationTranslucency();
@@ -1180,6 +1245,9 @@ public class NotificationPanelViewController extends PanelViewController {
 
     private void updateClock() {
         mKeyguardStatusViewController.setAlpha(mClockPositionResult.clockAlpha);
+        if (mKeyguardQsUserSwitchController != null) {
+            mKeyguardQsUserSwitchController.setAlpha(mClockPositionResult.clockAlpha);
+        }
         if (mKeyguardUserSwitcherController != null) {
             mKeyguardUserSwitcherController.setAlpha(mClockPositionResult.clockAlpha);
         }
@@ -1271,6 +1339,12 @@ public class NotificationPanelViewController extends PanelViewController {
         }
     }
 
+    public void expandWithQsDetail(DetailAdapter qsDetailAdapter) {
+        traceQsJank(true /* startTracing */, false /* wasCancelled */);
+        flingSettings(0 /* velocity */, FLING_EXPAND);
+        mQSDetailDisplayer.showDetailAdapter(qsDetailAdapter, 0, 0);
+    }
+
     public void expandWithoutQs() {
         if (isQsExpanded()) {
             flingSettings(0 /* velocity */, FLING_COLLAPSE);
@@ -3166,6 +3240,13 @@ public class NotificationPanelViewController extends PanelViewController {
                 true /* keyguardFadingAway */,
                 false /* goingToFullShade */,
                 mBarState);
+        if (mKeyguardQsUserSwitchController != null) {
+            mKeyguardQsUserSwitchController.setKeyguardQsUserSwitchVisibility(
+                    mBarState,
+                    true /* keyguardFadingAway */,
+                    false /* goingToFullShade */,
+                    mBarState);
+        }
         if (mKeyguardUserSwitcherController != null) {
             mKeyguardUserSwitcherController.setKeyguardUserSwitcherVisibility(
                     mBarState,
@@ -3432,6 +3513,12 @@ public class NotificationPanelViewController extends PanelViewController {
     }
 
     private void updateUserSwitcherVisibility(boolean open) {
+        // Do not update if previously called with the same state.
+        if (mKeyguardUserSwitcherIsShowing == open) {
+            return;
+        }
+        mKeyguardUserSwitcherIsShowing = open;
+
         if (open) {
             animateKeyguardStatusBarOut();
             mKeyguardStatusViewController.setKeyguardStatusViewVisibility(
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/policy/KeyguardQsUserSwitchController.java b/packages/SystemUI/src/com/android/systemui/statusbar/policy/KeyguardQsUserSwitchController.java
new file mode 100644
index 000000000000..38f3bc891394
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/policy/KeyguardQsUserSwitchController.java
@@ -0,0 +1,345 @@
+/*
+ * 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.statusbar.policy;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.database.DataSetObserver;
+import android.graphics.drawable.Drawable;
+import android.graphics.drawable.LayerDrawable;
+import android.os.UserManager;
+import android.text.TextUtils;
+import android.util.Log;
+import android.view.View;
+import android.view.ViewGroup;
+
+import com.android.internal.logging.UiEventLogger;
+import com.android.keyguard.KeyguardConstants;
+import com.android.keyguard.KeyguardVisibilityHelper;
+import com.android.keyguard.dagger.KeyguardUserSwitcherScope;
+import com.android.settingslib.drawable.CircleFramedDrawable;
+import com.android.systemui.R;
+import com.android.systemui.dagger.qualifiers.Main;
+import com.android.systemui.keyguard.ScreenLifecycle;
+import com.android.systemui.plugins.statusbar.StatusBarStateController;
+import com.android.systemui.statusbar.SysuiStatusBarStateController;
+import com.android.systemui.statusbar.notification.AnimatableProperty;
+import com.android.systemui.statusbar.notification.PropertyAnimator;
+import com.android.systemui.statusbar.notification.stack.AnimationProperties;
+import com.android.systemui.statusbar.notification.stack.StackStateAnimator;
+import com.android.systemui.statusbar.phone.DozeParameters;
+import com.android.systemui.statusbar.phone.NotificationPanelViewController;
+import com.android.systemui.statusbar.phone.UserAvatarView;
+import com.android.systemui.util.ViewController;
+
+import javax.inject.Inject;
+
+/**
+ * Manages the user switch on the Keyguard that is used for opening the QS user panel.
+ */
+@KeyguardUserSwitcherScope
+public class KeyguardQsUserSwitchController extends ViewController<UserAvatarView> {
+
+    private static final String TAG = "KeyguardQsUserSwitchController";
+    private static final boolean DEBUG = KeyguardConstants.DEBUG;
+
+    private static final AnimationProperties ANIMATION_PROPERTIES =
+            new AnimationProperties().setDuration(StackStateAnimator.ANIMATION_DURATION_STANDARD);
+
+    private final Context mContext;
+    private Resources mResources;
+    private final UserSwitcherController mUserSwitcherController;
+    private final ScreenLifecycle mScreenLifecycle;
+    private UserSwitcherController.BaseUserAdapter mAdapter;
+    private final KeyguardStateController mKeyguardStateController;
+    protected final SysuiStatusBarStateController mStatusBarStateController;
+    private final KeyguardVisibilityHelper mKeyguardVisibilityHelper;
+    private final KeyguardUserDetailAdapter mUserDetailAdapter;
+    private NotificationPanelViewController mNotificationPanelViewController;
+    private UserManager mUserManager;
+    UserSwitcherController.UserRecord mCurrentUser;
+
+    // State info for the user switch and keyguard
+    private int mBarState;
+    private float mDarkAmount;
+
+    private final StatusBarStateController.StateListener mStatusBarStateListener =
+            new StatusBarStateController.StateListener() {
+                @Override
+                public void onStateChanged(int newState) {
+                    if (DEBUG) Log.d(TAG, String.format("onStateChanged: newState=%d", newState));
+
+                    boolean goingToFullShade = mStatusBarStateController.goingToFullShade();
+                    boolean keyguardFadingAway = mKeyguardStateController.isKeyguardFadingAway();
+                    int oldState = mBarState;
+                    mBarState = newState;
+
+                    setKeyguardQsUserSwitchVisibility(
+                            newState,
+                            keyguardFadingAway,
+                            goingToFullShade,
+                            oldState);
+                }
+
+                @Override
+                public void onDozeAmountChanged(float linearAmount, float amount) {
+                    if (DEBUG) {
+                        Log.d(TAG, String.format("onDozeAmountChanged: linearAmount=%f amount=%f",
+                                linearAmount, amount));
+                    }
+                    setDarkAmount(amount);
+                }
+            };
+
+    @Inject
+    public KeyguardQsUserSwitchController(
+            UserAvatarView view,
+            Context context,
+            @Main Resources resources,
+            UserManager userManager,
+            ScreenLifecycle screenLifecycle,
+            UserSwitcherController userSwitcherController,
+            KeyguardStateController keyguardStateController,
+            SysuiStatusBarStateController statusBarStateController,
+            DozeParameters dozeParameters,
+            UiEventLogger uiEventLogger) {
+        super(view);
+        if (DEBUG) Log.d(TAG, "New KeyguardQsUserSwitchController");
+        mContext = context;
+        mResources = resources;
+        mUserManager = userManager;
+        mScreenLifecycle = screenLifecycle;
+        mUserSwitcherController = userSwitcherController;
+        mKeyguardStateController = keyguardStateController;
+        mStatusBarStateController = statusBarStateController;
+        mKeyguardVisibilityHelper = new KeyguardVisibilityHelper(mView,
+                keyguardStateController, dozeParameters);
+        mUserDetailAdapter = new KeyguardUserDetailAdapter(mUserSwitcherController, mContext,
+                uiEventLogger);
+    }
+
+    @Override
+    protected void onInit() {
+        super.onInit();
+        if (DEBUG) Log.d(TAG, "onInit");
+        mAdapter = new UserSwitcherController.BaseUserAdapter(mUserSwitcherController) {
+            @Override
+            public View getView(int position, View convertView, ViewGroup parent) {
+                return null;
+            }
+        };
+
+        mView.setOnClickListener(v -> {
+            if (isListAnimating()) {
+                return;
+            }
+
+            // Tapping anywhere in the view will open QS user panel
+            openQsUserPanel();
+        });
+
+        updateView(true /* forceUpdate */);
+    }
+
+    @Override
+    protected void onViewAttached() {
+        if (DEBUG) Log.d(TAG, "onViewAttached");
+        mAdapter.registerDataSetObserver(mDataSetObserver);
+        mDataSetObserver.onChanged();
+        mStatusBarStateController.addCallback(mStatusBarStateListener);
+    }
+
+    @Override
+    protected void onViewDetached() {
+        if (DEBUG) Log.d(TAG, "onViewDetached");
+
+        mAdapter.unregisterDataSetObserver(mDataSetObserver);
+        mStatusBarStateController.removeCallback(mStatusBarStateListener);
+    }
+
+    public final DataSetObserver mDataSetObserver = new DataSetObserver() {
+        @Override
+        public void onChanged() {
+            updateView(false /* forceUpdate */);
+        }
+    };
+
+    /**
+     * @return true if the current user has changed
+     */
+    private boolean updateCurrentUser() {
+        UserSwitcherController.UserRecord previousUser = mCurrentUser;
+        mCurrentUser = null;
+        for (int i = 0; i < mAdapter.getCount(); i++) {
+            UserSwitcherController.UserRecord r = mAdapter.getItem(i);
+            if (r.isCurrent) {
+                mCurrentUser = r;
+                return !mCurrentUser.equals(previousUser);
+            }
+        }
+        return mCurrentUser == null && previousUser != null;
+    }
+
+    /**
+     * @param forceUpdate whether to update view even if current user did not change
+     */
+    private void updateView(boolean forceUpdate) {
+        if (!updateCurrentUser() && !forceUpdate) {
+            return;
+        }
+
+        if (mCurrentUser == null) {
+            mView.setVisibility(View.GONE);
+            return;
+        }
+
+        mView.setVisibility(View.VISIBLE);
+
+        String currentUserName = mCurrentUser.info.name;
+        String contentDescription = null;
+
+        if (!TextUtils.isEmpty(currentUserName)) {
+            contentDescription = mContext.getString(
+                    R.string.accessibility_quick_settings_user,
+                    currentUserName);
+        }
+
+        if (!TextUtils.equals(mView.getContentDescription(), contentDescription)) {
+            mView.setContentDescription(contentDescription);
+        }
+
+        if (mCurrentUser.picture == null) {
+            mView.setDrawableWithBadge(getDrawable(mCurrentUser).mutate(),
+                    mCurrentUser.resolveId());
+        } else {
+            int avatarSize =
+                    (int) mResources.getDimension(R.dimen.kg_framed_avatar_size);
+            Drawable drawable = new CircleFramedDrawable(mCurrentUser.picture, avatarSize);
+            drawable.setColorFilter(
+                    mCurrentUser.isSwitchToEnabled ? null
+                            : mAdapter.getDisabledUserAvatarColorFilter());
+            mView.setDrawableWithBadge(drawable, mCurrentUser.info.id);
+        }
+    }
+
+    Drawable getDrawable(UserSwitcherController.UserRecord item) {
+        Drawable drawable;
+        if (item.isCurrent && item.isGuest) {
+            drawable = mContext.getDrawable(R.drawable.ic_avatar_guest_user);
+        } else {
+            drawable = mAdapter.getIconDrawable(mContext, item);
+        }
+
+        int iconColorRes;
+        if (item.isSwitchToEnabled) {
+            iconColorRes = R.color.kg_user_switcher_avatar_icon_color;
+        } else {
+            iconColorRes = R.color.kg_user_switcher_restricted_avatar_icon_color;
+        }
+        drawable.setTint(mResources.getColor(iconColorRes, mContext.getTheme()));
+
+        Drawable bg = mContext.getDrawable(R.drawable.kg_bg_avatar);
+        drawable = new LayerDrawable(new Drawable[]{bg, drawable});
+        return drawable;
+    }
+
+    /**
+     * Get the height of the keyguard user switcher view when closed.
+     */
+    public int getUserIconHeight() {
+        return mView.getHeight();
+    }
+
+    /**
+     * Set the visibility of the user avatar view based on some new state.
+     */
+    public void setKeyguardQsUserSwitchVisibility(
+            int statusBarState,
+            boolean keyguardFadingAway,
+            boolean goingToFullShade,
+            int oldStatusBarState) {
+        mKeyguardVisibilityHelper.setViewVisibility(
+                statusBarState, keyguardFadingAway, goingToFullShade, oldStatusBarState);
+    }
+
+    /**
+     * Update position of the view with an optional animation
+     */
+    public void updatePosition(int x, int y, boolean animate) {
+        PropertyAnimator.setProperty(mView, AnimatableProperty.Y, y, ANIMATION_PROPERTIES, animate);
+        PropertyAnimator.setProperty(mView, AnimatableProperty.TRANSLATION_X, -Math.abs(x),
+                ANIMATION_PROPERTIES, animate);
+    }
+
+    /**
+     * Set keyguard user avatar view alpha.
+     */
+    public void setAlpha(float alpha) {
+        if (!mKeyguardVisibilityHelper.isVisibilityAnimating()) {
+            mView.setAlpha(alpha);
+        }
+    }
+
+    /**
+     * Set the amount (ratio) that the device has transitioned to doze.
+     *
+     * @param darkAmount Amount of transition to doze: 1f for doze and 0f for awake.
+     */
+    private void setDarkAmount(float darkAmount) {
+        boolean isAwake = darkAmount != 0;
+        if (darkAmount == mDarkAmount) {
+            return;
+        }
+        mDarkAmount = darkAmount;
+        mView.setVisibility(isAwake ? View.VISIBLE : View.GONE);
+    }
+
+    private boolean isListAnimating() {
+        return mKeyguardVisibilityHelper.isVisibilityAnimating();
+    }
+
+    private void openQsUserPanel() {
+        mNotificationPanelViewController.expandWithQsDetail(mUserDetailAdapter);
+    }
+
+    public void setNotificationPanelViewController(
+            NotificationPanelViewController notificationPanelViewController) {
+        mNotificationPanelViewController = notificationPanelViewController;
+    }
+
+    class KeyguardUserDetailAdapter extends UserSwitcherController.UserDetailAdapter {
+        KeyguardUserDetailAdapter(UserSwitcherController userSwitcherController, Context context,
+                UiEventLogger uiEventLogger) {
+            super(userSwitcherController, context, uiEventLogger);
+        }
+
+        @Override
+        public boolean shouldAnimate() {
+            return false;
+        }
+
+        @Override
+        public boolean onDoneButtonClicked() {
+            if (mNotificationPanelViewController != null) {
+                mNotificationPanelViewController.animateCloseQs(true /* animateAway */);
+                return true;
+            } else {
+                return false;
+            }
+        }
+    }
+}
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/policy/UserSwitcherController.java b/packages/SystemUI/src/com/android/systemui/statusbar/policy/UserSwitcherController.java
index 019ab479e28e..d4029e64036e 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/policy/UserSwitcherController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/policy/UserSwitcherController.java
@@ -121,6 +121,7 @@ public class UserSwitcherController implements Dumpable {
     private Intent mSecondaryUserServiceIntent;
     private SparseBooleanArray mForcePictureLoadForUserId = new SparseBooleanArray(2);
     private final UiEventLogger mUiEventLogger;
+    public final DetailAdapter mUserDetailAdapter;
 
     @Inject
     public UserSwitcherController(Context context, KeyguardStateController keyguardStateController,
@@ -131,6 +132,7 @@ public class UserSwitcherController implements Dumpable {
         mBroadcastDispatcher = broadcastDispatcher;
         mActivityTaskManager = activityTaskManager;
         mUiEventLogger = uiEventLogger;
+        mUserDetailAdapter = new UserDetailAdapter(this, mContext, mUiEventLogger);
         if (!UserManager.isGuestUserEphemeral()) {
             mGuestResumeSessionReceiver.register(mBroadcastDispatcher);
         }
@@ -781,9 +783,20 @@ public class UserSwitcherController implements Dumpable {
         }
     }
 
-    public final DetailAdapter userDetailAdapter = new DetailAdapter() {
+    public static class UserDetailAdapter implements DetailAdapter {
         private final Intent USER_SETTINGS_INTENT = new Intent(Settings.ACTION_USER_SETTINGS);
 
+        private final UserSwitcherController mUserSwitcherController;
+        private final Context mContext;
+        private final UiEventLogger mUiEventLogger;
+
+        UserDetailAdapter(UserSwitcherController userSwitcherController, Context context,
+                UiEventLogger uiEventLogger) {
+            mUserSwitcherController = userSwitcherController;
+            mContext = context;
+            mUiEventLogger = uiEventLogger;
+        }
+
         @Override
         public CharSequence getTitle() {
             return mContext.getString(R.string.quick_settings_user_title);
@@ -794,7 +807,7 @@ public class UserSwitcherController implements Dumpable {
             UserDetailView v;
             if (!(convertView instanceof UserDetailView)) {
                 v = UserDetailView.inflate(context, parent, false);
-                v.createAndSetAdapter(UserSwitcherController.this, mUiEventLogger);
+                v.createAndSetAdapter(mUserSwitcherController, mUiEventLogger);
             } else {
                 v = (UserDetailView) convertView;
             }
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/KeyguardClockPositionAlgorithmTest.java b/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/KeyguardClockPositionAlgorithmTest.java
index 4162884680a9..9b623f950505 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/KeyguardClockPositionAlgorithmTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/KeyguardClockPositionAlgorithmTest.java
@@ -394,8 +394,8 @@ public class KeyguardClockPositionAlgorithmTest extends SysuiTestCase {
     private void positionClock() {
         mClockPositionAlgorithm.setup(EMPTY_MARGIN, SCREEN_HEIGHT, mNotificationStackHeight,
                 mPanelExpansion, SCREEN_HEIGHT, mKeyguardStatusHeight,
-                0 /* keyguardUserSwitcherHeight */, mPreferredClockY, mHasCustomClock,
-                mHasVisibleNotifs, mDark, ZERO_DRAG, false /* bypassEnabled */,
+                0 /* userSwitchHeight */, mPreferredClockY, 0 /* userSwitchPreferredY */,
+                mHasCustomClock, mHasVisibleNotifs, mDark, ZERO_DRAG, false /* bypassEnabled */,
                 0 /* unlockedStackScrollerPadding */, false /* udfpsEnrolled */, mQsExpansion,
                 mCutoutTopInset);
         mClockPositionAlgorithm.run(mClockPosition);
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/NotificationPanelViewTest.java b/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/NotificationPanelViewTest.java
index d0e70310810e..3f5a6992fcef 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/NotificationPanelViewTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/NotificationPanelViewTest.java
@@ -58,6 +58,7 @@ import com.android.keyguard.KeyguardClockSwitchController;
 import com.android.keyguard.KeyguardStatusView;
 import com.android.keyguard.KeyguardStatusViewController;
 import com.android.keyguard.KeyguardUpdateMonitor;
+import com.android.keyguard.dagger.KeyguardQsUserSwitchComponent;
 import com.android.keyguard.dagger.KeyguardStatusViewComponent;
 import com.android.keyguard.dagger.KeyguardUserSwitcherComponent;
 import com.android.systemui.R;
@@ -70,6 +71,7 @@ import com.android.systemui.controls.dagger.ControlsComponent;
 import com.android.systemui.doze.DozeLog;
 import com.android.systemui.media.MediaDataManager;
 import com.android.systemui.media.MediaHierarchyManager;
+import com.android.systemui.qs.QSDetailDisplayer;
 import com.android.systemui.statusbar.CommandQueue;
 import com.android.systemui.statusbar.FeatureFlags;
 import com.android.systemui.statusbar.KeyguardAffordanceView;
@@ -194,7 +196,11 @@ public class NotificationPanelViewTest extends SysuiTestCase {
     @Mock
     private KeyguardStatusViewComponent.Factory mKeyguardStatusViewComponentFactory;
     @Mock
-    private KeyguardUserSwitcherComponent.Factory mKeyguardUserSwitcherComponent;
+    private KeyguardQsUserSwitchComponent.Factory mKeyguardQsUserSwitchComponentFactory;
+    @Mock
+    private KeyguardUserSwitcherComponent.Factory mKeyguardUserSwitcherComponentFactory;
+    @Mock
+    private QSDetailDisplayer mQSDetailDisplayer;
     @Mock
     private KeyguardStatusViewComponent mKeyguardStatusViewComponent;
     @Mock
@@ -305,7 +311,9 @@ public class NotificationPanelViewTest extends SysuiTestCase {
                 mBiometricUnlockController, mStatusBarKeyguardViewManager,
                 mNotificationStackScrollLayoutController,
                 mKeyguardStatusViewComponentFactory,
-                mKeyguardUserSwitcherComponent,
+                mKeyguardQsUserSwitchComponentFactory,
+                mKeyguardUserSwitcherComponentFactory,
+                mQSDetailDisplayer,
                 mGroupManager,
                 mNotificationAreaController,
                 mAuthController,