Use logout button + owner for max # notifs calc

In the calculation for the max # notifications to show on the lock
screen, take into consideration the height of the logout button and
owner information.

Test: atest SystemUITests, manual
Bug: 170228350
Change-Id: Ia12c85df27b16d432608fef8a52eb0d4c9ff79ff

packages/SystemUI/src/com/android/keyguard/KeyguardStatusView.java

@@ -178,6 +178,13 @@ public class KeyguardStatusView extends GridLayout {
         return mLogoutView.getVisibility() == VISIBLE ? mLogoutView.getHeight() : 0;
     }
 
+    int getOwnerInfoHeight() {
+        if (mOwnerInfo == null) {
+            return 0;
+        }
+        return mOwnerInfo.getVisibility() == VISIBLE ? mOwnerInfo.getHeight() : 0;
+    }
+
     void updateLogoutView() {
         if (mLogoutView == null) {
             return;

packages/SystemUI/src/com/android/keyguard/KeyguardStatusViewController.java

@@ -129,6 +129,13 @@ public class KeyguardStatusViewController extends ViewController<KeyguardStatusV
         return mView.getLogoutButtonHeight();
     }
 
+    /**
+     * Get the height of the logout button.
+     */
+    public int getOwnerInfoHeight() {
+        return mView.getOwnerInfoHeight();
+    }
+
     /**
      * Set keyguard status view alpha.
      */

packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java

@@ -1861,7 +1861,6 @@ public class KeyguardUpdateMonitor implements TrustManager.TrustListener, Dumpab
             @Override
             public void onChange(boolean selfChange) {
                 updateLockScreenMode();
-                mHandler.sendEmptyMessage(MSG_LOCK_SCREEN_MODE);
             }
         };
         mContext.getContentResolver().registerContentObserver(
@@ -1870,14 +1869,22 @@ public class KeyguardUpdateMonitor implements TrustManager.TrustListener, Dumpab
     }
 
     private void updateLockScreenMode() {
-        mLockScreenMode = Settings.Global.getInt(mContext.getContentResolver(),
+        final int newMode = Settings.Global.getInt(mContext.getContentResolver(),
                 Settings.Global.SHOW_NEW_LOCKSCREEN,
                 isUdfpsEnrolled() ? 1 : 0);
+        if (newMode != mLockScreenMode) {
+            mLockScreenMode = newMode;
+            mHandler.sendEmptyMessage(MSG_LOCK_SCREEN_MODE);
+        }
     }
 
     private void updateUdfpsEnrolled(int userId) {
         mIsUdfpsEnrolled = mAuthController.isUdfpsEnrolled(userId);
     }
+
+    /**
+     * @return true if there's at least one udfps enrolled
+     */
     public boolean isUdfpsEnrolled() {
         return mIsUdfpsEnrolled;
     }
@@ -1917,6 +1924,7 @@ public class KeyguardUpdateMonitor implements TrustManager.TrustListener, Dumpab
             return;
         }
 
+        // TODO: Add support for multiple fingerprint sensors, b/173730729
         boolean shouldListenForFingerprint =
                 isUdfpsEnrolled() ? shouldListenForUdfps() : shouldListenForFingerprint();
         boolean runningOrRestarting = mFingerprintRunningState == BIOMETRIC_STATE_RUNNING

packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelViewController.java

@@ -926,6 +926,8 @@ public class NotificationPanelViewController extends PanelViewController {
         if (mUpdateMonitor.isUdfpsEnrolled()) {
             availableSpace = mNotificationStackScrollLayoutController.getHeight()
                     - minPadding - shelfSize
+                    - mKeyguardStatusViewController.getOwnerInfoHeight()
+                    - mKeyguardStatusViewController.getLogoutButtonHeight()
                     - (mStatusBar.getDisplayHeight() - mAuthController.getUdfpsRegion().top);
         }