Single-user restrictions

Introduces a new "blocked" state for each package. This is used to temporarily
disable an app via Settings->Restrictions.

PIN creation and challenge activities for use by Settings and other apps. PIN
is stored by the User Manager and it manages the interval for retry attempts
across reboots.

Change-Id: I4915329d1f72399bbcaf93a9ca9c0d2e69d098dd

3 files changed, 221 insertions, 8 deletions

diff --git a/core/java/com/android/internal/app/AlertActivity.java b/core/java/com/android/internal/app/AlertActivity.java
index 7251256..7456def 100644
--- a/core/java/com/android/internal/app/AlertActivity.java
+++ b/core/java/com/android/internal/app/AlertActivity.java
@@ -36,18 +36,18 @@ public abstract class AlertActivity extends Activity implements DialogInterface
      * @see #mAlertParams
      */
     protected AlertController mAlert;
-    
+
     /**
      * The parameters for the alert.
      */
     protected AlertController.AlertParams mAlertParams;
-    
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        
+
         mAlert = new AlertController(this, this, getWindow());
-        mAlertParams = new AlertController.AlertParams(this);        
+        mAlertParams = new AlertController.AlertParams(this);
     }
 
     public void cancel() {
@@ -65,7 +65,7 @@ public abstract class AlertActivity extends Activity implements DialogInterface
     /**
      * Sets up the alert, including applying the parameters to the alert model,
      * and installing the alert's content.
-     * 
+     *
      * @see #mAlert
      * @see #mAlertParams
      */
@@ -73,7 +73,7 @@ public abstract class AlertActivity extends Activity implements DialogInterface
         mAlertParams.apply(mAlert);
         mAlert.installContent();
     }
-    
+
     @Override
     public boolean onKeyDown(int keyCode, KeyEvent event) {
         if (mAlert.onKeyDown(keyCode, event)) return true;
@@ -85,6 +85,4 @@ public abstract class AlertActivity extends Activity implements DialogInterface
         if (mAlert.onKeyUp(keyCode, event)) return true;
         return super.onKeyUp(keyCode, event);
     }
-    
-    
 }
diff --git a/core/java/com/android/internal/app/RestrictionsPinActivity.java b/core/java/com/android/internal/app/RestrictionsPinActivity.java
new file mode 100644
index 0000000..57436f7
--- /dev/null
+++ b/core/java/com/android/internal/app/RestrictionsPinActivity.java
@@ -0,0 +1,187 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.internal.app;
+
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.os.Bundle;
+import android.os.UserManager;
+import android.text.Editable;
+import android.text.TextWatcher;
+import android.view.KeyEvent;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.EditText;
+import android.widget.TextView;
+import android.widget.TextView.OnEditorActionListener;
+
+import com.android.internal.R;
+
+/**
+ * This activity is launched by Settings and other apps to either create a new PIN or
+ * challenge for an existing PIN. The PIN is maintained by UserManager.
+ */
+public class RestrictionsPinActivity extends AlertActivity
+        implements DialogInterface.OnClickListener, TextWatcher, OnEditorActionListener {
+
+    private UserManager mUserManager;
+
+    private EditText mPin1Text;
+    private EditText mPin2Text;
+    private TextView mPinErrorMessage;
+    private TextView mPinMessage;
+
+    @Override
+    public void onCreate(Bundle icicle) {
+        super.onCreate(icicle);
+
+        AlertController.AlertParams ap = mAlertParams;
+        ap.mTitle = getString(R.string.restr_pin_enter_pin);
+        ap.mPositiveButtonText = getString(R.string.ok);
+        ap.mNegativeButtonText = getString(R.string.cancel);
+        ap.mPositiveButtonListener = this;
+        ap.mNegativeButtonListener = this;
+        LayoutInflater inflater =
+                (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+        ap.mView = inflater.inflate(R.layout.pin_challenge, null);
+
+        mPinMessage = (TextView) ap.mView.findViewById(R.id.pin_message);
+        mPin1Text = (EditText) ap.mView.findViewById(R.id.pin1_text);
+        mPin2Text = (EditText) ap.mView.findViewById(R.id.pin2_text);
+        mPinErrorMessage = (TextView) ap.mView.findViewById(R.id.pin_error_message);
+        mPin1Text.addTextChangedListener(this);
+        mPin2Text.addTextChangedListener(this);
+
+        mUserManager = (UserManager) getSystemService(Context.USER_SERVICE);
+
+        setupAlert();
+    }
+
+    protected boolean verifyingPin() {
+        return true;
+    }
+
+    public void onResume() {
+        super.onResume();
+
+        setPositiveButtonState(false);
+        boolean hasPin = mUserManager.hasRestrictionsPin();
+        if (verifyingPin()) {
+            if (hasPin) {
+                mPinMessage.setVisibility(View.GONE);
+                mPinErrorMessage.setVisibility(View.GONE);
+                mPin2Text.setVisibility(View.GONE);
+                mPin1Text.setOnEditorActionListener(this);
+                updatePinTimer(-1);
+            } else {
+                setResult(RESULT_OK);
+                finish();
+            }
+        } else if (hasPin) {
+            // Shouldn't really be in this state, exit
+            setResult(RESULT_OK);
+            finish();
+        }
+    }
+
+    private void setPositiveButtonState(boolean enabled) {
+        mAlert.getButton(DialogInterface.BUTTON_POSITIVE).setEnabled(enabled);
+    }
+
+    private void updatePinTimer(int pinTimerMs) {
+        if (pinTimerMs < 0) {
+            pinTimerMs = mUserManager.checkRestrictionsPin(null);
+        }
+        if (pinTimerMs >= 200) {
+            final int seconds = (pinTimerMs + 200) / 1000;
+            final String formatString = getResources().getQuantityString(
+                    R.plurals.restr_pin_countdown,
+                    seconds);
+            mPinErrorMessage.setText(String.format(formatString, seconds));
+            mPinErrorMessage.setVisibility(View.VISIBLE);
+            mPin1Text.setEnabled(false);
+            mPin1Text.setText("");
+            setPositiveButtonState(false);
+            mPin1Text.postDelayed(mCountdownRunnable, Math.min(1000, pinTimerMs));
+        } else {
+            mPinErrorMessage.setVisibility(View.INVISIBLE);
+            mPin1Text.setEnabled(true);
+            mPin1Text.setText("");
+        }
+    }
+
+    public void onClick(DialogInterface dialog, int which) {
+        setResult(RESULT_CANCELED);
+        if (which == AlertDialog.BUTTON_POSITIVE) {
+            performPositiveButtonAction();
+        } else if (which == AlertDialog.BUTTON_NEGATIVE) {
+            finish();
+        }
+    }
+
+    private void performPositiveButtonAction() {
+        if (verifyingPin()) {
+            int result = mUserManager.checkRestrictionsPin(mPin1Text.getText().toString());
+            if (result == UserManager.PIN_VERIFICATION_SUCCESS) {
+                setResult(RESULT_OK);
+                finish();
+            } else if (result >= 0) {
+                updatePinTimer(result);
+            }
+        } else {
+            if (mUserManager.changeRestrictionsPin(mPin1Text.getText().toString())) {
+                setResult(RESULT_OK);
+                finish();
+            }
+        }
+    }
+
+    @Override
+    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
+    }
+
+    @Override
+    public void onTextChanged(CharSequence s, int start, int before, int count) {
+        CharSequence pin1 = mPin1Text.getText();
+        if (!verifyingPin()) {
+            CharSequence pin2 = mPin2Text.getText();
+            boolean match = pin1 != null && pin2 != null && pin1.length() >= 4
+                    && pin1.toString().equals(pin2.toString());
+            setPositiveButtonState(match);
+            mPinErrorMessage.setVisibility(match ? View.INVISIBLE : View.VISIBLE);
+        } else {
+            setPositiveButtonState(pin1 != null && pin1.length() >= 4);
+        }
+    }
+
+    @Override
+    public void afterTextChanged(Editable s) {
+    }
+
+    @Override
+    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
+        performPositiveButtonAction();
+        return true;
+    }
+
+    private Runnable mCountdownRunnable = new Runnable() {
+        public void run() {
+            updatePinTimer(-1);
+        }
+    };
+}
diff --git a/core/java/com/android/internal/app/RestrictionsPinSetupActivity.java b/core/java/com/android/internal/app/RestrictionsPinSetupActivity.java
new file mode 100644
index 0000000..35f2967
--- /dev/null
+++ b/core/java/com/android/internal/app/RestrictionsPinSetupActivity.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.internal.app;
+
+/**
+ * This activity is launched by Settings and other apps to either create a new PIN or
+ * challenge for an existing PIN. The PIN is maintained by UserManager.
+ */
+public class RestrictionsPinSetupActivity extends RestrictionsPinActivity {
+
+    protected boolean verifyingPin() {
+        return false;
+    }
+}