calling back SetupFaceLock to clean up temporary gallery

This is done when the backup lock is complete or canceled.
If successful, the permanent gallery is replaced with the new one.
If canceled, the temporary gallery is deleted

Also deletes the main gallery if the lock type is changed from facial recognition

Change-Id: Id1ce804dec6b71b6410af53c050ad265c4cad5b0

Author: Steven Ross

core/java/com/android/internal/widget/LockPatternUtils.java

@@ -23,6 +23,7 @@
 import android.app.admin.DevicePolicyManager;
 import android.content.ContentResolver;
 import android.content.Context;
+import android.content.Intent;
 import android.os.FileObserver;
 import android.os.IBinder;
 import android.os.RemoteException;
@@ -125,6 +126,8 @@ public class LockPatternUtils {
 
     private static FileObserver sPasswordObserver;
 
+    private static boolean mLastAttemptWasBiometric = false;
+
     private static class PasswordFileObserver extends FileObserver {
         public PasswordFileObserver(String path, int mask) {
             super(path, mask);
@@ -371,7 +374,8 @@ public int getActivePasswordQuality() {
     /**
      * Clear any lock pattern or password.
      */
-    public void clearLock() {
+    public void clearLock(boolean isFallback) {
+        if(!isFallback) deleteGallery();
         saveLockPassword(null, DevicePolicyManager.PASSWORD_QUALITY_SOMETHING);
         setLockPatternEnabled(false);
         saveLockPattern(null);
@@ -389,6 +393,13 @@ public void setLockScreenDisabled(boolean disable) {
         setLong(DISABLE_LOCKSCREEN_KEY, disable ? 1 : 0);
     }
 
+    /**
+     * Sets whether the last lockscreen setup attempt was biometric
+     */
+    public static void setLastAttemptWasBiometric(boolean val) {
+        mLastAttemptWasBiometric = val;
+    }
+
     /**
      * Determine if LockScreen can be disabled. This is used, for example, to tell if we should
      * show LockScreen or go straight to the home screen.
@@ -407,6 +418,41 @@ public void saveLockPattern(List<LockPatternView.Cell> pattern) {
         this.saveLockPattern(pattern, false);
     }
 
+    /**
+     * Calls back SetupFaceLock to save the temporary gallery file if this is the backup lock.
+     * This doesn't have to verify that biometric is enabled because it's only called in that case
+    */
+    void moveTempGallery() {
+        Intent intent = new Intent().setClassName("com.android.facelock",
+                "com.android.facelock.SetupFaceLock");
+        intent.putExtra("moveTempGallery", true);
+        mContext.startActivity(intent);
+    }
+
+    /**
+     * Calls back SetupFaceLock to delete the temporary gallery file if this is the backup lock.
+     */
+    public void deleteTempGallery() {
+        //if(mLastAttemptWasBiometric) {
+            Intent intent = new Intent().setClassName("com.android.facelock",
+                    "com.android.facelock.SetupFaceLock");
+            intent.putExtra("deleteTempGallery", true);
+            mContext.startActivity(intent);
+            //}
+    }
+
+    /**
+     * Calls back SetupFaceLock to delete the gallery file when the lock type is changed
+    */
+    void deleteGallery() {
+        if(isBiometricEnabled()) {
+            Intent intent = new Intent().setClassName("com.android.facelock",
+                    "com.android.facelock.SetupFaceLock");
+            intent.putExtra("deleteGallery", true);
+            mContext.startActivity(intent);
+        }
+    }
+
     /**
      * Save a lock pattern.
      * @param pattern The new pattern to save.
@@ -431,11 +477,13 @@ public void saveLockPattern(List<LockPatternView.Cell> pattern, boolean isFallba
                 keyStore.password(patternToString(pattern));
                 setBoolean(PATTERN_EVER_CHOSEN_KEY, true);
                 if (!isFallback) {
+                    deleteGallery();
                     setLong(PASSWORD_TYPE_KEY, DevicePolicyManager.PASSWORD_QUALITY_SOMETHING);
                 } else {
                     setLong(PASSWORD_TYPE_KEY, DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK);
                     setLong(PASSWORD_TYPE_ALTERNATE_KEY,
                             DevicePolicyManager.PASSWORD_QUALITY_SOMETHING);
+                    moveTempGallery();
                 }
                 dpm.setActivePasswordState(DevicePolicyManager.PASSWORD_QUALITY_SOMETHING, pattern
                         .size(), 0, 0, 0, 0, 0, 0);
@@ -547,10 +595,12 @@ public void saveLockPassword(String password, int quality, boolean isFallback) {
 
                 int computedQuality = computePasswordQuality(password);
                 if (!isFallback) {
+                    deleteGallery();
                     setLong(PASSWORD_TYPE_KEY, Math.max(quality, computedQuality));
                 } else {
                     setLong(PASSWORD_TYPE_KEY, DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK);
                     setLong(PASSWORD_TYPE_ALTERNATE_KEY, Math.max(quality, computedQuality));
+                    moveTempGallery();
                 }
                 if (computedQuality != DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED) {
                     int letters = 0;