Merge changes from topic "flexible_bars" into rvc-qpr-dev am: a5404a59f2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12001030

Change-Id: I7bee21bde74fe82d89e050d48dada44b080ce244

8 files changed, 263 insertions, 30 deletions

diff --git a/core/java/android/view/WindowManagerPolicyConstants.java b/core/java/android/view/WindowManagerPolicyConstants.java
index 492ab6f8a3d5..8c355202b63f 100644
--- a/core/java/android/view/WindowManagerPolicyConstants.java
+++ b/core/java/android/view/WindowManagerPolicyConstants.java
@@ -49,6 +49,13 @@ public interface WindowManagerPolicyConstants {
     int PRESENCE_INTERNAL = 1 << 0;
     int PRESENCE_EXTERNAL = 1 << 1;
 
+    // Alternate bars position values
+    int ALT_BAR_UNKNOWN = -1;
+    int ALT_BAR_LEFT = 1 << 0;
+    int ALT_BAR_RIGHT = 1 << 1;
+    int ALT_BAR_BOTTOM = 1 << 2;
+    int ALT_BAR_TOP = 1 << 3;
+
     // Navigation bar position values
     int NAV_BAR_INVALID = -1;
     int NAV_BAR_LEFT = 1 << 0;
diff --git a/packages/CarSystemUI/src/com/android/systemui/car/navigationbar/CarNavigationBar.java b/packages/CarSystemUI/src/com/android/systemui/car/navigationbar/CarNavigationBar.java
index 37dfce4e16ce..35b2080dddf9 100644
--- a/packages/CarSystemUI/src/com/android/systemui/car/navigationbar/CarNavigationBar.java
+++ b/packages/CarSystemUI/src/com/android/systemui/car/navigationbar/CarNavigationBar.java
@@ -16,10 +16,12 @@
 
 package com.android.systemui.car.navigationbar;
 
+import static android.view.InsetsState.ITYPE_BOTTOM_GESTURES;
 import static android.view.InsetsState.ITYPE_CLIMATE_BAR;
 import static android.view.InsetsState.ITYPE_EXTRA_NAVIGATION_BAR;
 import static android.view.InsetsState.ITYPE_NAVIGATION_BAR;
 import static android.view.InsetsState.ITYPE_STATUS_BAR;
+import static android.view.InsetsState.ITYPE_TOP_GESTURES;
 import static android.view.InsetsState.containsType;
 import static android.view.WindowInsetsController.APPEARANCE_LIGHT_STATUS_BARS;
 
@@ -368,13 +370,15 @@ public class CarNavigationBar extends SystemUI implements CommandQueue.Callbacks
             WindowManager.LayoutParams lp = new WindowManager.LayoutParams(
                     ViewGroup.LayoutParams.MATCH_PARENT,
                     height,
-                    WindowManager.LayoutParams.TYPE_STATUS_BAR,
+                    WindowManager.LayoutParams.TYPE_STATUS_BAR_ADDITIONAL,
                     WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                             | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
                             | WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH
                             | WindowManager.LayoutParams.FLAG_SPLIT_TOUCH,
                     PixelFormat.TRANSLUCENT);
             lp.setTitle("TopCarNavigationBar");
+            lp.providesInsetsTypes = new int[]{ITYPE_STATUS_BAR, ITYPE_TOP_GESTURES};
+            lp.setFitInsetsTypes(0);
             lp.windowAnimations = 0;
             lp.gravity = Gravity.TOP;
             mWindowManager.addView(mTopNavigationBarWindow, lp);
@@ -388,13 +392,14 @@ public class CarNavigationBar extends SystemUI implements CommandQueue.Callbacks
             WindowManager.LayoutParams lp = new WindowManager.LayoutParams(
                     ViewGroup.LayoutParams.MATCH_PARENT,
                     height,
-                    WindowManager.LayoutParams.TYPE_NAVIGATION_BAR,
+                    WindowManager.LayoutParams.TYPE_NAVIGATION_BAR_PANEL,
                     WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                             | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
                             | WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH
                             | WindowManager.LayoutParams.FLAG_SPLIT_TOUCH,
                     PixelFormat.TRANSLUCENT);
             lp.setTitle("BottomCarNavigationBar");
+            lp.providesInsetsTypes = new int[]{ITYPE_NAVIGATION_BAR, ITYPE_BOTTOM_GESTURES};
             lp.windowAnimations = 0;
             lp.gravity = Gravity.BOTTOM;
             mWindowManager.addView(mBottomNavigationBarWindow, lp);
diff --git a/packages/CarSystemUI/src/com/android/systemui/car/navigationbar/CarNavigationBarView.java b/packages/CarSystemUI/src/com/android/systemui/car/navigationbar/CarNavigationBarView.java
index 029d4c7fa2fb..0ced4021ce38 100644
--- a/packages/CarSystemUI/src/com/android/systemui/car/navigationbar/CarNavigationBarView.java
+++ b/packages/CarSystemUI/src/com/android/systemui/car/navigationbar/CarNavigationBarView.java
@@ -16,7 +16,10 @@
 
 package com.android.systemui.car.navigationbar;
 
+import static android.view.WindowInsets.Type.systemBars;
+
 import android.content.Context;
+import android.graphics.Insets;
 import android.util.AttributeSet;
 import android.view.MotionEvent;
 import android.view.View;
@@ -79,9 +82,28 @@ public class CarNavigationBarView extends LinearLayout {
 
     @Override
     public WindowInsets onApplyWindowInsets(WindowInsets windowInsets) {
+        applyMargins(windowInsets.getInsets(systemBars()));
         return windowInsets;
     }
 
+    private void applyMargins(Insets insets) {
+        final int count = getChildCount();
+        for (int i = 0; i < count; i++) {
+            View child = getChildAt(i);
+            if (child.getLayoutParams() instanceof LayoutParams) {
+                LayoutParams lp = (LayoutParams) child.getLayoutParams();
+                if (lp.rightMargin != insets.right || lp.leftMargin != insets.left
+                        || lp.topMargin != insets.top || lp.bottomMargin != insets.bottom) {
+                    lp.rightMargin = insets.right;
+                    lp.leftMargin = insets.left;
+                    lp.topMargin = insets.top;
+                    lp.bottomMargin = insets.bottom;
+                    child.requestLayout();
+                }
+            }
+        }
+    }
+
     // Used to forward touch events even if the touch was initiated from a child component
     @Override
     public boolean onInterceptTouchEvent(MotionEvent ev) {
diff --git a/services/core/java/com/android/server/policy/WindowManagerPolicy.java b/services/core/java/com/android/server/policy/WindowManagerPolicy.java
index 8868a6c2e6d8..a1d42d3d5682 100644
--- a/services/core/java/com/android/server/policy/WindowManagerPolicy.java
+++ b/services/core/java/com/android/server/policy/WindowManagerPolicy.java
@@ -141,6 +141,10 @@ public interface WindowManagerPolicy extends WindowManagerPolicyConstants {
     @IntDef({NAV_BAR_LEFT, NAV_BAR_RIGHT, NAV_BAR_BOTTOM})
     @interface NavigationBarPosition {}
 
+    @Retention(SOURCE)
+    @IntDef({ALT_BAR_UNKNOWN, ALT_BAR_LEFT, ALT_BAR_RIGHT, ALT_BAR_BOTTOM, ALT_BAR_TOP})
+    @interface AltBarPosition {}
+
     /**
      * Pass this event to the user / app.  To be returned from
      * {@link #interceptKeyBeforeQueueing}.
diff --git a/services/core/java/com/android/server/wm/DisplayPolicy.java b/services/core/java/com/android/server/wm/DisplayPolicy.java
index 5ae6f80b262d..3b5c2422f742 100644
--- a/services/core/java/com/android/server/wm/DisplayPolicy.java
+++ b/services/core/java/com/android/server/wm/DisplayPolicy.java
@@ -102,6 +102,11 @@ import static android.view.WindowManager.LayoutParams.TYPE_VOLUME_OVERLAY;
 import static android.view.WindowManager.LayoutParams.TYPE_WALLPAPER;
 import static android.view.WindowManagerGlobal.ADD_OKAY;
 import static android.view.WindowManagerPolicyConstants.ACTION_HDMI_PLUGGED;
+import static android.view.WindowManagerPolicyConstants.ALT_BAR_BOTTOM;
+import static android.view.WindowManagerPolicyConstants.ALT_BAR_LEFT;
+import static android.view.WindowManagerPolicyConstants.ALT_BAR_RIGHT;
+import static android.view.WindowManagerPolicyConstants.ALT_BAR_TOP;
+import static android.view.WindowManagerPolicyConstants.ALT_BAR_UNKNOWN;
 import static android.view.WindowManagerPolicyConstants.EXTRA_HDMI_PLUGGED_STATE;
 import static android.view.WindowManagerPolicyConstants.NAV_BAR_BOTTOM;
 import static android.view.WindowManagerPolicyConstants.NAV_BAR_LEFT;
@@ -314,6 +319,17 @@ public class DisplayPolicy {
     private int[] mNavigationBarHeightForRotationInCarMode = new int[4];
     private int[] mNavigationBarWidthForRotationInCarMode = new int[4];
 
+    // Alternative status bar for when flexible insets mapping is used to place the status bar on
+    // another side of the screen.
+    private WindowState mStatusBarAlt = null;
+    @WindowManagerPolicy.AltBarPosition
+    private int mStatusBarAltPosition = ALT_BAR_UNKNOWN;
+    // Alternative navigation bar for when flexible insets mapping is used to place the navigation
+    // bar elsewhere on the screen.
+    private WindowState mNavigationBarAlt = null;
+    @WindowManagerPolicy.AltBarPosition
+    private int mNavigationBarAltPosition = ALT_BAR_UNKNOWN;
+
     /** See {@link #getNavigationBarFrameHeight} */
     private int[] mNavigationBarFrameHeightForRotationDefault = new int[4];
 
@@ -431,7 +447,7 @@ public class DisplayPolicy {
                 case MSG_REQUEST_TRANSIENT_BARS:
                     synchronized (mLock) {
                         WindowState targetBar = (msg.arg1 == MSG_REQUEST_TRANSIENT_BARS_ARG_STATUS)
-                                ? mStatusBar : mNavigationBar;
+                                ? getStatusBar() : getNavigationBar();
                         if (targetBar != null) {
                             requestTransientBars(targetBar);
                         }
@@ -494,6 +510,7 @@ public class DisplayPolicy {
                             if (mStatusBar != null) {
                                 requestTransientBars(mStatusBar);
                             }
+                            checkAltBarSwipeForTransientBars(ALT_BAR_TOP);
                         }
                     }
 
@@ -504,6 +521,7 @@ public class DisplayPolicy {
                                     && mNavigationBarPosition == NAV_BAR_BOTTOM) {
                                 requestTransientBars(mNavigationBar);
                             }
+                            checkAltBarSwipeForTransientBars(ALT_BAR_BOTTOM);
                         }
                     }
 
@@ -520,6 +538,7 @@ public class DisplayPolicy {
                                             excludedRegion)) {
                                 requestTransientBars(mNavigationBar);
                             }
+                            checkAltBarSwipeForTransientBars(ALT_BAR_RIGHT);
                         }
                         excludedRegion.recycle();
                     }
@@ -537,6 +556,7 @@ public class DisplayPolicy {
                                             excludedRegion)) {
                                 requestTransientBars(mNavigationBar);
                             }
+                            checkAltBarSwipeForTransientBars(ALT_BAR_LEFT);
                         }
                         excludedRegion.recycle();
                     }
@@ -638,6 +658,15 @@ public class DisplayPolicy {
         mHandler.post(mGestureNavigationSettingsObserver::register);
     }
 
+    private void checkAltBarSwipeForTransientBars(@WindowManagerPolicy.AltBarPosition int pos) {
+        if (mStatusBarAlt != null && mStatusBarAltPosition == pos) {
+            requestTransientBars(mStatusBarAlt);
+        }
+        if (mNavigationBarAlt != null && mNavigationBarAltPosition == pos) {
+            requestTransientBars(mNavigationBarAlt);
+        }
+    }
+
     void systemReady() {
         mSystemGestures.systemReady();
         if (mService.mPointerLocationEnabled) {
@@ -899,6 +928,14 @@ public class DisplayPolicy {
                 }
                 break;
         }
+
+        // Check if alternate bars positions were updated.
+        if (mStatusBarAlt == win) {
+            mStatusBarAltPosition = getAltBarPosition(attrs);
+        }
+        if (mNavigationBarAlt == win) {
+            mNavigationBarAltPosition = getAltBarPosition(attrs);
+        }
     }
 
     /**
@@ -938,10 +975,9 @@ public class DisplayPolicy {
                 mContext.enforcePermission(
                         android.Manifest.permission.STATUS_BAR_SERVICE, callingPid, callingUid,
                         "DisplayPolicy");
-                if (mStatusBar != null) {
-                    if (mStatusBar.isAlive()) {
-                        return WindowManagerGlobal.ADD_MULTIPLE_SINGLETON;
-                    }
+                if ((mStatusBar != null && mStatusBar.isAlive())
+                        || (mStatusBarAlt != null && mStatusBarAlt.isAlive())) {
+                    return WindowManagerGlobal.ADD_MULTIPLE_SINGLETON;
                 }
                 break;
             case TYPE_NOTIFICATION_SHADE:
@@ -958,10 +994,9 @@ public class DisplayPolicy {
                 mContext.enforcePermission(
                         android.Manifest.permission.STATUS_BAR_SERVICE, callingPid, callingUid,
                         "DisplayPolicy");
-                if (mNavigationBar != null) {
-                    if (mNavigationBar.isAlive()) {
-                        return WindowManagerGlobal.ADD_MULTIPLE_SINGLETON;
-                    }
+                if ((mNavigationBar != null && mNavigationBar.isAlive())
+                        || (mNavigationBarAlt != null && mNavigationBarAlt.isAlive())) {
+                    return WindowManagerGlobal.ADD_MULTIPLE_SINGLETON;
                 }
                 break;
             case TYPE_NAVIGATION_BAR_PANEL:
@@ -993,6 +1028,23 @@ public class DisplayPolicy {
                     android.Manifest.permission.STATUS_BAR_SERVICE, callingPid, callingUid,
                     "DisplayPolicy");
             enforceSingleInsetsTypeCorrespondingToWindowType(attrs.providesInsetsTypes);
+
+            for (@InternalInsetsType int insetType : attrs.providesInsetsTypes) {
+                switch (insetType) {
+                    case ITYPE_STATUS_BAR:
+                        if ((mStatusBar != null && mStatusBar.isAlive())
+                                || (mStatusBarAlt != null && mStatusBarAlt.isAlive())) {
+                            return WindowManagerGlobal.ADD_MULTIPLE_SINGLETON;
+                        }
+                        break;
+                    case ITYPE_NAVIGATION_BAR:
+                        if ((mNavigationBar != null && mNavigationBar.isAlive())
+                                || (mNavigationBarAlt != null && mNavigationBarAlt.isAlive())) {
+                            return WindowManagerGlobal.ADD_MULTIPLE_SINGLETON;
+                        }
+                        break;
+                }
+            }
         }
         return ADD_OKAY;
     }
@@ -1084,7 +1136,19 @@ public class DisplayPolicy {
                 break;
             default:
                 if (attrs.providesInsetsTypes != null) {
-                    for (int insetsType : attrs.providesInsetsTypes) {
+                    for (@InternalInsetsType int insetsType : attrs.providesInsetsTypes) {
+                        switch (insetsType) {
+                            case ITYPE_STATUS_BAR:
+                                mStatusBarAlt = win;
+                                mStatusBarController.setWindow(mStatusBarAlt);
+                                mStatusBarAltPosition = getAltBarPosition(attrs);
+                                break;
+                            case ITYPE_NAVIGATION_BAR:
+                                mNavigationBarAlt = win;
+                                mNavigationBarController.setWindow(mNavigationBarAlt);
+                                mNavigationBarAltPosition = getAltBarPosition(attrs);
+                                break;
+                        }
                         mDisplayContent.setInsetProvider(insetsType, win, null);
                     }
                 }
@@ -1092,6 +1156,22 @@ public class DisplayPolicy {
         }
     }
 
+    @WindowManagerPolicy.AltBarPosition
+    private int getAltBarPosition(WindowManager.LayoutParams params) {
+        switch (params.gravity) {
+            case Gravity.LEFT:
+                return ALT_BAR_LEFT;
+            case Gravity.RIGHT:
+                return ALT_BAR_RIGHT;
+            case Gravity.BOTTOM:
+                return ALT_BAR_BOTTOM;
+            case Gravity.TOP:
+                return ALT_BAR_TOP;
+            default:
+                return ALT_BAR_UNKNOWN;
+        }
+    }
+
     TriConsumer<DisplayFrames, WindowState, Rect> getImeSourceFrameProvider() {
         return (displayFrames, windowState, inOutFrame) -> {
             if (mNavigationBar != null && navigationBarPosition(displayFrames.mDisplayWidth,
@@ -1132,12 +1212,14 @@ public class DisplayPolicy {
      * @param win The window being removed.
      */
     void removeWindowLw(WindowState win) {
-        if (mStatusBar == win) {
+        if (mStatusBar == win || mStatusBarAlt == win) {
             mStatusBar = null;
+            mStatusBarAlt = null;
             mStatusBarController.setWindow(null);
             mDisplayContent.setInsetProvider(ITYPE_STATUS_BAR, null, null);
-        } else if (mNavigationBar == win) {
+        } else if (mNavigationBar == win || mNavigationBarAlt == win) {
             mNavigationBar = null;
+            mNavigationBarAlt = null;
             mNavigationBarController.setWindow(null);
             mDisplayContent.setInsetProvider(ITYPE_NAVIGATION_BAR, null, null);
         } else if (mNotificationShade == win) {
@@ -1163,7 +1245,7 @@ public class DisplayPolicy {
     }
 
     WindowState getStatusBar() {
-        return mStatusBar;
+        return mStatusBar != null ? mStatusBar : mStatusBarAlt;
     }
 
     WindowState getNotificationShade() {
@@ -1171,7 +1253,7 @@ public class DisplayPolicy {
     }
 
     WindowState getNavigationBar() {
-        return mNavigationBar;
+        return mNavigationBar != null ? mNavigationBar : mNavigationBarAlt;
     }
 
     /**
@@ -1233,6 +1315,46 @@ public class DisplayPolicy {
                     return R.anim.dock_left_enter;
                 }
             }
+        } else if (win == mStatusBarAlt || win == mNavigationBarAlt) {
+            if (win.getAttrs().windowAnimations != 0) {
+                return ANIMATION_STYLEABLE;
+            }
+
+            int pos = (win == mStatusBarAlt) ? mStatusBarAltPosition : mNavigationBarAltPosition;
+
+            boolean isExitOrHide = transit == TRANSIT_EXIT || transit == TRANSIT_HIDE;
+            boolean isEnterOrShow = transit == TRANSIT_ENTER || transit == TRANSIT_SHOW;
+
+            switch (pos) {
+                case ALT_BAR_LEFT:
+                    if (isExitOrHide) {
+                        return R.anim.dock_left_exit;
+                    } else if (isEnterOrShow) {
+                        return R.anim.dock_left_enter;
+                    }
+                    break;
+                case ALT_BAR_RIGHT:
+                    if (isExitOrHide) {
+                        return R.anim.dock_right_exit;
+                    } else if (isEnterOrShow) {
+                        return R.anim.dock_right_enter;
+                    }
+                    break;
+                case ALT_BAR_BOTTOM:
+                    if (isExitOrHide) {
+                        return R.anim.dock_bottom_exit;
+                    } else if (isEnterOrShow) {
+                        return R.anim.dock_bottom_enter;
+                    }
+                    break;
+                case ALT_BAR_TOP:
+                    if (isExitOrHide) {
+                        return R.anim.dock_top_exit;
+                    } else if (isEnterOrShow) {
+                        return R.anim.dock_top_enter;
+                    }
+                    break;
+            }
         }
 
         if (transit == TRANSIT_PREVIEW_DONE) {
@@ -1591,7 +1713,7 @@ public class DisplayPolicy {
                 mInputConsumer = null;
                 Slog.v(TAG, INPUT_CONSUMER_NAVIGATION + " dismissed.");
             }
-        } else if (mInputConsumer == null && mStatusBar != null && canHideNavigationBar()) {
+        } else if (mInputConsumer == null && getStatusBar() != null && canHideNavigationBar()) {
             mInputConsumer = mDisplayContent.getInputMonitor().createInputConsumer(
                     mHandler.getLooper(),
                     INPUT_CONSUMER_NAVIGATION,
@@ -2677,10 +2799,10 @@ public class DisplayPolicy {
             mDreamingLockscreen = mService.mPolicy.isKeyguardShowingAndNotOccluded();
         }
 
-        if (mStatusBar != null) {
+        if (getStatusBar() != null) {
             if (DEBUG_LAYOUT) Slog.i(TAG, "force=" + mForceStatusBar
                     + " top=" + mTopFullscreenOpaqueWindowState);
-            final boolean forceShowStatusBar = (mStatusBar.getAttrs().privateFlags
+            final boolean forceShowStatusBar = (getStatusBar().getAttrs().privateFlags
                     & PRIVATE_FLAG_FORCE_SHOW_STATUS_BAR) != 0;
             final boolean notificationShadeForcesShowingNavigation =
                     mNotificationShade != null
@@ -3166,6 +3288,16 @@ public class DisplayPolicy {
         return mNavigationBarPosition;
     }
 
+    @WindowManagerPolicy.AltBarPosition
+    int getAlternateStatusBarPosition() {
+        return mStatusBarAltPosition;
+    }
+
+    @WindowManagerPolicy.AltBarPosition
+    int getAlternateNavBarPosition() {
+        return mNavigationBarAltPosition;
+    }
+
     /**
      * A new window has been focused.
      */
@@ -3327,8 +3459,8 @@ public class DisplayPolicy {
         final boolean isFullscreen = (visibility & (View.SYSTEM_UI_FLAG_FULLSCREEN
                         | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION)) != 0
                 || (PolicyControl.getWindowFlags(win, win.mAttrs) & FLAG_FULLSCREEN) != 0
-                || (mStatusBar != null && insetsPolicy.isHidden(ITYPE_STATUS_BAR))
-                || (mNavigationBar != null && insetsPolicy.isHidden(
+                || (getStatusBar() != null && insetsPolicy.isHidden(ITYPE_STATUS_BAR))
+                || (getNavigationBar() != null && insetsPolicy.isHidden(
                         ITYPE_NAVIGATION_BAR));
         final int behavior = win.mAttrs.insetsFlags.behavior;
         final boolean isImmersive = (visibility & (View.SYSTEM_UI_FLAG_IMMERSIVE
@@ -3583,7 +3715,7 @@ public class DisplayPolicy {
         final boolean hideNavBarSysui =
                 (vis & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) != 0;
 
-        final boolean transientStatusBarAllowed = mStatusBar != null
+        final boolean transientStatusBarAllowed = getStatusBar() != null
                 && (notificationShadeHasFocus || (!mForceShowSystemBars
                 && (hideStatusBarWM || (hideStatusBarSysui && immersiveSticky))));
 
@@ -3741,7 +3873,7 @@ public class DisplayPolicy {
     // TODO(b/118118435): Remove this after migration
     private boolean isImmersiveMode(int vis) {
         final int flags = View.SYSTEM_UI_FLAG_IMMERSIVE | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
-        return mNavigationBar != null
+        return getNavigationBar() != null
                 && (vis & View.SYSTEM_UI_FLAG_HIDE_NAVIGATION) != 0
                 && (vis & flags) != 0
                 && canHideNavigationBar();
@@ -3749,7 +3881,7 @@ public class DisplayPolicy {
 
     private boolean isImmersiveMode(WindowState win) {
         final int behavior = win.mAttrs.insetsFlags.behavior;
-        return mNavigationBar != null
+        return getNavigationBar() != null
                 && canHideNavigationBar()
                 && (behavior == BEHAVIOR_SHOW_BARS_BY_SWIPE
                         || behavior == BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE)
@@ -3830,8 +3962,8 @@ public class DisplayPolicy {
     public void takeScreenshot(int screenshotType, int source) {
         if (mScreenshotHelper != null) {
             mScreenshotHelper.takeScreenshot(screenshotType,
-                    mStatusBar != null && mStatusBar.isVisibleLw(),
-                    mNavigationBar != null && mNavigationBar.isVisibleLw(),
+                    getStatusBar() != null && getStatusBar().isVisibleLw(),
+                    getNavigationBar() != null && getNavigationBar().isVisibleLw(),
                     source, mHandler, null /* completionConsumer */);
         }
     }
@@ -3869,6 +4001,11 @@ public class DisplayPolicy {
         if (mStatusBar != null) {
             pw.print(prefix); pw.print("mStatusBar="); pw.print(mStatusBar);
         }
+        if (mStatusBarAlt != null) {
+            pw.print(prefix); pw.print("mStatusBarAlt="); pw.print(mStatusBarAlt);
+            pw.print(prefix); pw.print("mStatusBarAltPosition=");
+            pw.println(mStatusBarAltPosition);
+        }
         if (mNotificationShade != null) {
             pw.print(prefix); pw.print("mExpandedPanel="); pw.print(mNotificationShade);
         }
@@ -3880,6 +4017,11 @@ public class DisplayPolicy {
             pw.print(prefix); pw.print("mNavigationBarPosition=");
             pw.println(mNavigationBarPosition);
         }
+        if (mNavigationBarAlt != null) {
+            pw.print(prefix); pw.print("mNavigationBarAlt="); pw.println(mNavigationBarAlt);
+            pw.print(prefix); pw.print("mNavigationBarAltPosition=");
+            pw.println(mNavigationBarAltPosition);
+        }
         if (mFocusedWindow != null) {
             pw.print(prefix); pw.print("mFocusedWindow="); pw.println(mFocusedWindow);
         }
diff --git a/services/core/java/com/android/server/wm/WindowManagerService.java b/services/core/java/com/android/server/wm/WindowManagerService.java
index 371d6b56f687..b7ac54f3470e 100644
--- a/services/core/java/com/android/server/wm/WindowManagerService.java
+++ b/services/core/java/com/android/server/wm/WindowManagerService.java
@@ -2163,6 +2163,10 @@ public class WindowManagerService extends IWindowManager.Stub
                     throw new IllegalArgumentException(
                             "Window type can not be changed after the window is added.");
                 }
+                if (!Arrays.equals(win.mAttrs.providesInsetsTypes, attrs.providesInsetsTypes)) {
+                    throw new IllegalArgumentException(
+                            "Insets types can not be changed after the window is added.");
+                }
 
                 // Odd choice but less odd than embedding in copyFrom()
                 if ((attrs.privateFlags & WindowManager.LayoutParams.PRIVATE_FLAG_PRESERVE_GEOMETRY)
diff --git a/services/tests/wmtests/src/com/android/server/wm/DisplayPolicyLayoutTests.java b/services/tests/wmtests/src/com/android/server/wm/DisplayPolicyLayoutTests.java
index 278de56dfea0..2f3afbcb6d72 100644
--- a/services/tests/wmtests/src/com/android/server/wm/DisplayPolicyLayoutTests.java
+++ b/services/tests/wmtests/src/com/android/server/wm/DisplayPolicyLayoutTests.java
@@ -40,8 +40,13 @@ import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_IS_SCREEN_DEC
 import static android.view.WindowManager.LayoutParams.SOFT_INPUT_ADJUST_NOTHING;
 import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION;
 import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
+import static android.view.WindowManager.LayoutParams.TYPE_NAVIGATION_BAR_PANEL;
 import static android.view.WindowManager.LayoutParams.TYPE_STATUS_BAR;
 import static android.view.WindowManager.LayoutParams.TYPE_STATUS_BAR_SUB_PANEL;
+import static android.view.WindowManagerPolicyConstants.ALT_BAR_BOTTOM;
+import static android.view.WindowManagerPolicyConstants.ALT_BAR_LEFT;
+import static android.view.WindowManagerPolicyConstants.ALT_BAR_RIGHT;
+import static android.view.WindowManagerPolicyConstants.ALT_BAR_TOP;
 
 import static org.hamcrest.Matchers.is;
 import static org.junit.Assert.assertEquals;
@@ -60,6 +65,7 @@ import android.util.Pair;
 import android.util.SparseArray;
 import android.view.DisplayCutout;
 import android.view.DisplayInfo;
+import android.view.Gravity;
 import android.view.InsetsState;
 import android.view.WindowInsets.Side;
 import android.view.WindowInsets.Type;
@@ -147,6 +153,8 @@ public class DisplayPolicyLayoutTests extends DisplayPolicyTestsBase {
 
     @Test
     public void addingWindow_withInsetsTypes() {
+        mDisplayPolicy.removeWindowLw(mStatusBarWindow);  // Removes the existing one.
+
         WindowState win = createWindow(null, TYPE_STATUS_BAR_SUB_PANEL, "StatusBarSubPanel");
         win.mAttrs.providesInsetsTypes = new int[]{ITYPE_STATUS_BAR, ITYPE_TOP_GESTURES};
         win.getFrameLw().set(0, 0, 500, 100);
@@ -196,6 +204,47 @@ public class DisplayPolicyLayoutTests extends DisplayPolicyTestsBase {
     }
 
     @Test
+    public void addingWindow_variousGravities_alternateBarPosUpdated() {
+        mDisplayPolicy.removeWindowLw(mNavBarWindow);  // Removes the existing one.
+
+        WindowState win1 = createWindow(null, TYPE_NAVIGATION_BAR_PANEL, "NavBarPanel1");
+        win1.mAttrs.providesInsetsTypes = new int[]{ITYPE_NAVIGATION_BAR};
+        win1.mAttrs.gravity = Gravity.TOP;
+        win1.getFrameLw().set(0, 0, 200, 500);
+        addWindow(win1);
+
+        assertEquals(mDisplayPolicy.getAlternateNavBarPosition(), ALT_BAR_TOP);
+        mDisplayPolicy.removeWindowLw(win1);
+
+        WindowState win2 = createWindow(null, TYPE_NAVIGATION_BAR_PANEL, "NavBarPanel2");
+        win2.mAttrs.providesInsetsTypes = new int[]{ITYPE_NAVIGATION_BAR};
+        win2.mAttrs.gravity = Gravity.BOTTOM;
+        win2.getFrameLw().set(0, 0, 200, 500);
+        addWindow(win2);
+
+        assertEquals(mDisplayPolicy.getAlternateNavBarPosition(), ALT_BAR_BOTTOM);
+        mDisplayPolicy.removeWindowLw(win2);
+
+        WindowState win3 = createWindow(null, TYPE_NAVIGATION_BAR_PANEL, "NavBarPanel3");
+        win3.mAttrs.providesInsetsTypes = new int[]{ITYPE_NAVIGATION_BAR};
+        win3.mAttrs.gravity = Gravity.LEFT;
+        win3.getFrameLw().set(0, 0, 200, 500);
+        addWindow(win3);
+
+        assertEquals(mDisplayPolicy.getAlternateNavBarPosition(), ALT_BAR_LEFT);
+        mDisplayPolicy.removeWindowLw(win3);
+
+        WindowState win4 = createWindow(null, TYPE_NAVIGATION_BAR_PANEL, "NavBarPanel4");
+        win4.mAttrs.providesInsetsTypes = new int[]{ITYPE_NAVIGATION_BAR};
+        win4.mAttrs.gravity = Gravity.RIGHT;
+        win4.getFrameLw().set(0, 0, 200, 500);
+        addWindow(win4);
+
+        assertEquals(mDisplayPolicy.getAlternateNavBarPosition(), ALT_BAR_RIGHT);
+        mDisplayPolicy.removeWindowLw(win4);
+    }
+
+    @Test
     public void layoutWindowLw_fitStatusBars() {
         mWindow.mAttrs.setFitInsetsTypes(Type.statusBars());
         addWindow(mWindow);
diff --git a/services/tests/wmtests/src/com/android/server/wm/ScreenDecorWindowTests.java b/services/tests/wmtests/src/com/android/server/wm/ScreenDecorWindowTests.java
index 31a102ae3bad..ef74861e9422 100644
--- a/services/tests/wmtests/src/com/android/server/wm/ScreenDecorWindowTests.java
+++ b/services/tests/wmtests/src/com/android/server/wm/ScreenDecorWindowTests.java
@@ -25,8 +25,8 @@ import static android.view.Gravity.BOTTOM;
 import static android.view.Gravity.LEFT;
 import static android.view.Gravity.RIGHT;
 import static android.view.Gravity.TOP;
-import static android.view.InsetsState.ITYPE_NAVIGATION_BAR;
-import static android.view.InsetsState.ITYPE_STATUS_BAR;
+import static android.view.InsetsState.ITYPE_CLIMATE_BAR;
+import static android.view.InsetsState.ITYPE_EXTRA_NAVIGATION_BAR;
 import static android.view.ViewGroup.LayoutParams.MATCH_PARENT;
 import static android.view.WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;
 import static android.view.WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
@@ -190,7 +190,7 @@ public class ScreenDecorWindowTests {
 
     @Test
     public void testProvidesInsetsTypes() {
-        int[] providesInsetsTypes = new int[]{ITYPE_STATUS_BAR};
+        int[] providesInsetsTypes = new int[]{ITYPE_CLIMATE_BAR};
         final View win = createWindow("StatusBarSubPanel", TOP, MATCH_PARENT, mDecorThickness, RED,
                 FLAG_LAYOUT_IN_SCREEN, 0, providesInsetsTypes);
 
@@ -199,7 +199,7 @@ public class ScreenDecorWindowTests {
 
     private View createDecorWindow(int gravity, int width, int height) {
         int[] providesInsetsTypes =
-                new int[]{gravity == TOP ? ITYPE_STATUS_BAR : ITYPE_NAVIGATION_BAR};
+                new int[]{gravity == TOP ? ITYPE_CLIMATE_BAR : ITYPE_EXTRA_NAVIGATION_BAR};
         return createWindow("decorWindow", gravity, width, height, RED,
                 FLAG_LAYOUT_IN_SCREEN, PRIVATE_FLAG_IS_SCREEN_DECOR, providesInsetsTypes);
     }