Add continuous falsing to keyguard.

With this change, taps outside of the bouncer inputs increase the
FalsingManager's belief that erroneous taps are happening. If the
belief becomes strong enough, the bouncer will be retracted.

Special attention is given to ensure that actual password inputs
are not recorded by the falsing manager. Valid button and pattern
inputs do not have their motion events recorded, but do _decrease_
the FalsingManager's belief in pocket dialing. Thus, a few bad taps
mixed with good taps will not retract the bouncer.

Test: atest SystemUITests && manual
Bug: 172655679
Change-Id: Iac8d2a2f41764f3c1cccb66b9d332c489cabca77

1 files changed, 53 insertions, 3 deletions

diff --git a/packages/SystemUI/src/com/android/keyguard/KeyguardSecurityContainerController.java b/packages/SystemUI/src/com/android/keyguard/KeyguardSecurityContainerController.java
index fdab8db67431..7eac9034f02a 100644
--- a/packages/SystemUI/src/com/android/keyguard/KeyguardSecurityContainerController.java
+++ b/packages/SystemUI/src/com/android/keyguard/KeyguardSecurityContainerController.java
@@ -33,6 +33,7 @@ import android.metrics.LogMaker;
 import android.os.UserHandle;
 import android.util.Log;
 import android.util.Slog;
+import android.view.MotionEvent;
 
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.logging.MetricsLogger;
@@ -46,6 +47,8 @@ import com.android.keyguard.KeyguardSecurityContainer.SwipeListener;
 import com.android.keyguard.KeyguardSecurityModel.SecurityMode;
 import com.android.keyguard.dagger.KeyguardBouncerScope;
 import com.android.settingslib.utils.ThreadUtils;
+import com.android.systemui.Gefingerpoken;
+import com.android.systemui.plugins.FalsingManager;
 import com.android.systemui.shared.system.SysUiStatsLog;
 import com.android.systemui.statusbar.policy.ConfigurationController;
 import com.android.systemui.statusbar.policy.KeyguardStateController;
@@ -71,9 +74,44 @@ public class KeyguardSecurityContainerController extends ViewController<Keyguard
     private final KeyguardSecurityViewFlipperController mSecurityViewFlipperController;
     private final SecurityCallback mSecurityCallback;
     private final ConfigurationController mConfigurationController;
+    private final KeyguardViewController mKeyguardViewController;
+    private final FalsingManager mFalsingManager;
 
     private SecurityMode mCurrentSecurityMode = SecurityMode.Invalid;
 
+    private final Gefingerpoken mGlobalTouchListener = new Gefingerpoken() {
+        private MotionEvent mTouchDown;
+        @Override
+        public boolean onInterceptTouchEvent(MotionEvent ev) {
+            return false;
+        }
+
+        @Override
+        public boolean onTouchEvent(MotionEvent ev) {
+            // Do just a bit of our own falsing. People should only be tapping on the input, not
+            // swiping.
+            if (ev.getActionMasked() == MotionEvent.ACTION_DOWN) {
+                if (mTouchDown != null) {
+                    mTouchDown.recycle();
+                    mTouchDown = null;
+                }
+                mTouchDown = MotionEvent.obtain(ev);
+            } else if (mTouchDown != null) {
+                boolean tapResult = mFalsingManager.isFalseTap(true, 0.6);
+                if (tapResult
+                        || ev.getActionMasked() == MotionEvent.ACTION_UP
+                        || ev.getActionMasked() == MotionEvent.ACTION_CANCEL) {
+                    if (tapResult) {
+                        mKeyguardViewController.reset(true);
+                    }
+                    mTouchDown.recycle();
+                    mTouchDown = null;
+                }
+            }
+            return false;
+        }
+    };
+
     private KeyguardSecurityCallback mKeyguardSecurityCallback = new KeyguardSecurityCallback() {
         public void userActivity() {
             if (mSecurityCallback != null) {
@@ -169,7 +207,9 @@ public class KeyguardSecurityContainerController extends ViewController<Keyguard
             KeyguardStateController keyguardStateController,
             SecurityCallback securityCallback,
             KeyguardSecurityViewFlipperController securityViewFlipperController,
-            ConfigurationController configurationController) {
+            ConfigurationController configurationController,
+            KeyguardViewController keyguardViewController,
+            FalsingManager falsingManager) {
         super(view);
         mLockPatternUtils = lockPatternUtils;
         mUpdateMonitor = keyguardUpdateMonitor;
@@ -182,6 +222,8 @@ public class KeyguardSecurityContainerController extends ViewController<Keyguard
         mAdminSecondaryLockScreenController = adminSecondaryLockScreenControllerFactory.create(
                 mKeyguardSecurityCallback);
         mConfigurationController = configurationController;
+        mKeyguardViewController = keyguardViewController;
+        mFalsingManager = falsingManager;
     }
 
     @Override
@@ -192,12 +234,14 @@ public class KeyguardSecurityContainerController extends ViewController<Keyguard
     @Override
     protected void onViewAttached() {
         mView.setSwipeListener(mSwipeListener);
+        mView.addMotionEventListener(mGlobalTouchListener);
         mConfigurationController.addCallback(mConfigurationListener);
     }
 
     @Override
     protected void onViewDetached() {
         mConfigurationController.removeCallback(mConfigurationListener);
+        mView.removeMotionEventListener(mGlobalTouchListener);
     }
 
     /** */
@@ -479,6 +523,8 @@ public class KeyguardSecurityContainerController extends ViewController<Keyguard
         private final KeyguardStateController mKeyguardStateController;
         private final KeyguardSecurityViewFlipperController mSecurityViewFlipperController;
         private final ConfigurationController mConfigurationController;
+        private final KeyguardViewController mKeyguardViewController;
+        private final FalsingManager mFalsingManager;
 
         @Inject
         Factory(KeyguardSecurityContainer view,
@@ -491,7 +537,9 @@ public class KeyguardSecurityContainerController extends ViewController<Keyguard
                 UiEventLogger uiEventLogger,
                 KeyguardStateController keyguardStateController,
                 KeyguardSecurityViewFlipperController securityViewFlipperController,
-                ConfigurationController configurationController) {
+                ConfigurationController configurationController,
+                KeyguardViewController keyguardViewController,
+                FalsingManager falsingManager) {
             mView = view;
             mAdminSecondaryLockScreenControllerFactory = adminSecondaryLockScreenControllerFactory;
             mLockPatternUtils = lockPatternUtils;
@@ -502,6 +550,8 @@ public class KeyguardSecurityContainerController extends ViewController<Keyguard
             mKeyguardStateController = keyguardStateController;
             mSecurityViewFlipperController = securityViewFlipperController;
             mConfigurationController = configurationController;
+            mKeyguardViewController = keyguardViewController;
+            mFalsingManager = falsingManager;
         }
 
         public KeyguardSecurityContainerController create(
@@ -510,7 +560,7 @@ public class KeyguardSecurityContainerController extends ViewController<Keyguard
                     mAdminSecondaryLockScreenControllerFactory, mLockPatternUtils,
                     mKeyguardUpdateMonitor, mKeyguardSecurityModel, mMetricsLogger, mUiEventLogger,
                     mKeyguardStateController, securityCallback, mSecurityViewFlipperController,
-                    mConfigurationController);
+                    mConfigurationController, mKeyguardViewController, mFalsingManager);
         }
 
     }