Lockscreen: longpress on expand challenge handle

- Unsecure screen lock, long press will unlock the device
- Secure screen lock, long press and widget will fade into the background and secure method is displayed

Change-Id: I7d980f8e7e07226c97a64a63910a1410e6fb84c0

Author: MarcLandis

core/res/res/layout-port/keyguard_host_view.xml

@@ -80,6 +80,7 @@
         </com.android.internal.policy.impl.keyguard.KeyguardSecurityContainer>
 
         <ImageButton
+              android:id="@+id/expand_challenge_handle"
               android:layout_width="match_parent"
               android:layout_height="@dimen/kg_widget_pager_bottom_padding"
               androidprv:layout_childType="expandChallengeHandle"

core/res/res/values/symbols.xml

@@ -1888,6 +1888,7 @@
 
   <!-- Lockscreen -->
   <java-symbol type="bool" name="config_disableHomeUnlockSetting" />
+  <java-symbol type="id" name="expand_challenge_handle" />
   <!-- Lock screen always show battery -->
   <java-symbol type="string" name="lockscreen_discharging" />
 

policy/src/com/android/internal/policy/impl/keyguard/KeyguardHostView.java

@@ -47,6 +47,7 @@
 import android.util.AttributeSet;
 import android.util.Log;
 import android.util.Slog;
+import android.view.HapticFeedbackConstants;
 import android.view.KeyEvent;
 import android.view.LayoutInflater;
 import android.view.MotionEvent;
@@ -79,6 +80,7 @@ public class KeyguardHostView extends KeyguardViewBase {
     private KeyguardSecurityViewFlipper mSecurityViewContainer;
     private KeyguardSelectorView mKeyguardSelectorView;
     private KeyguardTransportControlView mTransportControl;
+    private View mExpandChallengeView;
     private boolean mIsVerifyUnlockOnly;
     private boolean mEnableFallback; // TODO: This should get the value from KeyguardPatternView
     private SecurityMode mCurrentSecuritySelection = SecurityMode.Invalid;
@@ -250,9 +252,27 @@ protected void onFinishInflate() {
 
         showPrimarySecurityScreen(false);
         updateSecurityViews();
+
+        mExpandChallengeView = (View) findViewById(R.id.expand_challenge_handle);
+        if (mExpandChallengeView != null) {
+            mExpandChallengeView.setOnLongClickListener(mFastUnlockClickListener);
+        }
+
         minimizeChallengeIfDesired();
     }
 
+    private final OnLongClickListener mFastUnlockClickListener = new OnLongClickListener() {
+        @Override
+        public boolean onLongClick(View v) {
+            if (mLockPatternUtils.isTactileFeedbackEnabled()) {
+                v.performHapticFeedback(HapticFeedbackConstants.LONG_PRESS,
+                        HapticFeedbackConstants.FLAG_IGNORE_GLOBAL_SETTING);
+            }
+            showNextSecurityScreenOrFinish(false);
+            return true;
+        }
+    };
+
     private int getDisabledFeatures(DevicePolicyManager dpm) {
         int disabledFeatures = DevicePolicyManager.KEYGUARD_DISABLE_FEATURES_NONE;
         if (dpm != null) {