Fix 5555408: allow emergency button to be disabled on SIM/PUK unlock screen

Some carriers cannot process emergency calls when the IMSI is not available,
which happens when the SIM is locked.  This allows the behavior to be overwritten
in an overlay. When the config variable is set to 'false', the emergency
button no longer appears on the SIM or PUK unlock screens.

Change-Id: I3127bfd5e7ebfabea997fbe048cc474e48b7a81c

3 files changed, 31 insertions, 15 deletions

diff --git a/policy/src/com/android/internal/policy/impl/KeyguardStatusViewManager.java b/policy/src/com/android/internal/policy/impl/KeyguardStatusViewManager.java
index dafbdcf..a7da96e 100644
--- a/policy/src/com/android/internal/policy/impl/KeyguardStatusViewManager.java
+++ b/policy/src/com/android/internal/policy/impl/KeyguardStatusViewManager.java
@@ -91,7 +91,7 @@ class KeyguardStatusViewManager implements OnClickListener {
     private LockPatternUtils mLockPatternUtils;
     private KeyguardUpdateMonitor mUpdateMonitor;
     private Button mEmergencyCallButton;
-    private boolean mUnlockDisabledDueToSimState;
+    private boolean mEmergencyButtonEnabledBecauseSimLocked;
 
     // Shadowed text values
     private CharSequence mCarrierText;
@@ -101,9 +101,10 @@ class KeyguardStatusViewManager implements OnClickListener {
     private CharSequence mOwnerInfoText;
     private boolean mShowingStatus;
     private KeyguardScreenCallback mCallback;
-    private final boolean mShowEmergencyButtonByDefault;
+    private final boolean mEmergencyCallButtonEnabledInScreen;
     private CharSequence mPlmn;
     private CharSequence mSpn;
+    protected int mPhoneState;
 
     private class TransientTextManager {
         private TextView mTextView;
@@ -154,9 +155,17 @@ class KeyguardStatusViewManager implements OnClickListener {
         }
     };
 
+    /**
+     *
+     * @param view the containing view of all widgets
+     * @param updateMonitor the update monitor to use
+     * @param lockPatternUtils lock pattern util object
+     * @param callback used to invoke emergency dialer
+     * @param emergencyButtonEnabledInScreen whether emergency button is enabled by default
+     */
     public KeyguardStatusViewManager(View view, KeyguardUpdateMonitor updateMonitor,
                 LockPatternUtils lockPatternUtils, KeyguardScreenCallback callback,
-                boolean showEmergencyButtonByDefault) {
+                boolean emergencyButtonEnabledInScreen) {
         if (DEBUG) Log.v(TAG, "KeyguardStatusViewManager()");
         mContainer = view;
         mDateFormatString = getContext().getString(R.string.full_wday_month_day_no_year);
@@ -171,7 +180,7 @@ class KeyguardStatusViewManager implements OnClickListener {
         mOwnerInfoView = (TextView) findViewById(R.id.propertyOf);
         mTransportView = (TransportControlView) findViewById(R.id.transport);
         mEmergencyCallButton = (Button) findViewById(R.id.emergencyCallButton);
-        mShowEmergencyButtonByDefault = showEmergencyButtonByDefault;
+        mEmergencyCallButtonEnabledInScreen = emergencyButtonEnabledInScreen;
 
         // Hide transport control view until we know we need to show it.
         if (mTransportView != null) {
@@ -452,12 +461,12 @@ class KeyguardStatusViewManager implements OnClickListener {
      *
      * @param simState
      */
-    private void updateCarrierTextWithSimStatus(State simState) {
+    private void updateCarrierStateWithSimStatus(State simState) {
         if (DEBUG) Log.d(TAG, "updateCarrierTextWithSimStatus(), simState = " + simState);
 
         CharSequence carrierText = null;
         int carrierHelpTextId = 0;
-        mUnlockDisabledDueToSimState = false;
+        mEmergencyButtonEnabledBecauseSimLocked = false;
         mStatus = getStatusForIccState(simState);
         mSimState = simState;
         switch (mStatus) {
@@ -479,32 +488,35 @@ class KeyguardStatusViewManager implements OnClickListener {
             case SimPermDisabled:
                 carrierText = getContext().getText(R.string.lockscreen_missing_sim_message_short);
                 carrierHelpTextId = R.string.lockscreen_permanent_disabled_sim_instructions;
-                mUnlockDisabledDueToSimState = true;
+                mEmergencyButtonEnabledBecauseSimLocked = true;
                 break;
 
             case SimMissingLocked:
                 carrierText = makeCarierString(mPlmn,
                         getContext().getText(R.string.lockscreen_missing_sim_message_short));
                 carrierHelpTextId = R.string.lockscreen_missing_sim_instructions;
-                mUnlockDisabledDueToSimState = true;
+                mEmergencyButtonEnabledBecauseSimLocked = true;
                 break;
 
             case SimLocked:
                 carrierText = makeCarierString(mPlmn,
                         getContext().getText(R.string.lockscreen_sim_locked_message));
+                mEmergencyButtonEnabledBecauseSimLocked = true;
                 break;
 
             case SimPukLocked:
                 carrierText = makeCarierString(mPlmn,
                         getContext().getText(R.string.lockscreen_sim_puk_locked_message));
                 if (!mLockPatternUtils.isPukUnlockScreenEnable()) {
-                    mUnlockDisabledDueToSimState = true;
+                    // This means we're showing the PUK unlock screen
+                    mEmergencyButtonEnabledBecauseSimLocked = true;
                 }
                 break;
         }
 
         setCarrierText(carrierText);
         setCarrierHelpText(carrierHelpTextId);
+        updateEmergencyCallButtonState(mPhoneState);
     }
 
     private View findViewById(int id) {
@@ -569,9 +581,12 @@ class KeyguardStatusViewManager implements OnClickListener {
 
     private void updateEmergencyCallButtonState(int phoneState) {
         if (mEmergencyCallButton != null) {
-            boolean showIfCapable = mShowEmergencyButtonByDefault || mUnlockDisabledDueToSimState;
+            boolean enabledBecauseSimLocked =
+                    mLockPatternUtils.isEmergencyCallEnabledWhileSimLocked()
+                    && mEmergencyButtonEnabledBecauseSimLocked;
+            boolean shown = mEmergencyCallButtonEnabledInScreen || enabledBecauseSimLocked;
             mLockPatternUtils.updateEmergencyCallButtonState(mEmergencyCallButton,
-                    phoneState, showIfCapable);
+                    phoneState, shown);
         }
     }
 
@@ -594,7 +609,7 @@ class KeyguardStatusViewManager implements OnClickListener {
         public void onRefreshCarrierInfo(CharSequence plmn, CharSequence spn) {
             mPlmn = plmn;
             mSpn = spn;
-            updateCarrierTextWithSimStatus(mSimState);
+            updateCarrierStateWithSimStatus(mSimState);
         }
 
         public void onRingerModeChanged(int state) {
@@ -602,6 +617,7 @@ class KeyguardStatusViewManager implements OnClickListener {
         }
 
         public void onPhoneStateChanged(int phoneState) {
+            mPhoneState = phoneState;
             updateEmergencyCallButtonState(phoneState);
         }
 
@@ -618,7 +634,7 @@ class KeyguardStatusViewManager implements OnClickListener {
     private SimStateCallback mSimStateCallback = new SimStateCallback() {
 
         public void onSimStateChanged(State simState) {
-            updateCarrierTextWithSimStatus(simState);
+            updateCarrierStateWithSimStatus(simState);
         }
     };
 
diff --git a/policy/src/com/android/internal/policy/impl/SimPukUnlockScreen.java b/policy/src/com/android/internal/policy/impl/SimPukUnlockScreen.java
index 6acd1c5..47a7157 100644
--- a/policy/src/com/android/internal/policy/impl/SimPukUnlockScreen.java
+++ b/policy/src/com/android/internal/policy/impl/SimPukUnlockScreen.java
@@ -106,7 +106,7 @@ public class SimPukUnlockScreen extends LinearLayout implements KeyguardScreen,
         mHeaderText.setSelected(true);
 
         mKeyguardStatusViewManager = new KeyguardStatusViewManager(this, updateMonitor,
-                lockpatternutils, callback, true);
+                lockpatternutils, callback, false);
 
         mPinText.setFocusableInTouchMode(true);
         mPinText.setOnFocusChangeListener(this);
diff --git a/policy/src/com/android/internal/policy/impl/SimUnlockScreen.java b/policy/src/com/android/internal/policy/impl/SimUnlockScreen.java
index 184748a..99e1ce1 100644
--- a/policy/src/com/android/internal/policy/impl/SimUnlockScreen.java
+++ b/policy/src/com/android/internal/policy/impl/SimUnlockScreen.java
@@ -100,7 +100,7 @@ public class SimUnlockScreen extends LinearLayout implements KeyguardScreen, Vie
         mOkButton.setOnClickListener(this);
 
         mKeyguardStatusViewManager = new KeyguardStatusViewManager(this, updateMonitor,
-                lockpatternutils, callback, true);
+                lockpatternutils, callback, false);
 
         setFocusableInTouchMode(true);
     }