Keyguard: Forward port lockscreen quick unlock (2/2)

res/values/cm_strings.xml

@@ -77,6 +77,10 @@
     <!-- PIN scramble -->
     <string name="unlock_scramble_pin_layout_title">Scramble layout</string>
     <string name="unlock_scramble_pin_layout_summary">Scramble PIN layout when unlocking device</string>
+
+	 <!-- Quick unlock -->
+    <string name="unlock_quick_unlock_control_title">Quick unlock</string>
+    <string name="unlock_quick_unlock_control_summary">Unlock automatically when the correct PIN/password is entered</string>
 
     <!-- Lock screen pattern size -->
     <string name="lock_pattern_size_3" translatable="false">3 \u00d7 3</string>

res/xml/screen_lock_settings.xml

@@ -54,4 +54,10 @@
         android:title="@string/unlock_scramble_pin_layout_title"
         android:summary="@string/unlock_scramble_pin_layout_summary" />
 
+    <!-- available in pin/password -->
+    <SwitchPreference
+        android:key="lockscreen_quick_unlock_control"
+        android:title="@string/unlock_quick_unlock_control_title"
+        android:summary="@string/unlock_quick_unlock_control_summary" />
+
 </PreferenceScreen>

src/com/android/settings/security/screenlock/QuickUnlockPreferenceController.java

@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2017 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.settings.security.screenlock;
+
+import android.app.admin.DevicePolicyManager;
+import android.content.Context;
+import android.os.UserHandle;
+import android.provider.Settings;
+import android.text.TextUtils;
+
+import androidx.preference.Preference;
+import androidx.preference.SwitchPreference;
+import androidx.preference.TwoStatePreference;
+
+import com.android.internal.widget.LockPatternUtils;
+import com.android.settings.R;
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settings.overlay.FeatureFactory;
+import com.android.settings.security.trustagent.TrustAgentManager;
+import com.android.settingslib.core.AbstractPreferenceController;
+
+public class QuickUnlockPreferenceController extends AbstractPreferenceController
+        implements PreferenceControllerMixin, Preference.OnPreferenceChangeListener {
+
+    private static final String KEY_LOCKSCREEN_QUICK_UNLOCK_CONTROL = "lockscreen_quick_unlock_control";
+
+    private final int mUserId;
+    private final LockPatternUtils mLockPatternUtils;
+    private final TrustAgentManager mTrustAgentManager;
+
+    public QuickUnlockPreferenceController(Context context, int userId,
+            LockPatternUtils lockPatternUtils) {
+        super(context);
+        mUserId = userId;
+        mLockPatternUtils = lockPatternUtils;
+        mTrustAgentManager = FeatureFactory.getFactory(context)
+                .getSecurityFeatureProvider().getTrustAgentManager();
+    }
+
+    @Override
+    public boolean isAvailable() {
+        if (!mLockPatternUtils.isSecure(mUserId)) {
+            return false;
+        }
+        switch (mLockPatternUtils.getKeyguardStoredPasswordQuality(mUserId)) {
+            case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC:
+            case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC_COMPLEX:
+            case DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC:
+            case DevicePolicyManager.PASSWORD_QUALITY_COMPLEX:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        int value = Settings.System.getIntForUser(
+                mContext.getContentResolver(), Settings.System.LOCKSCREEN_QUICK_UNLOCK_CONTROL, 0, UserHandle.USER_CURRENT);
+        ((SwitchPreference) preference).setChecked(value != 0);
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        boolean value = (Boolean) newValue;
+        Settings.System.putIntForUser(
+                mContext.getContentResolver(), Settings.System.LOCKSCREEN_QUICK_UNLOCK_CONTROL, value ? 1 : 0, UserHandle.USER_CURRENT);
+        return true;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY_LOCKSCREEN_QUICK_UNLOCK_CONTROL;
+    }
+}

src/com/android/settings/security/screenlock/ScreenLockSettings.java

@@ -81,6 +81,8 @@ private static List<AbstractPreferenceController> buildPreferenceControllers(Con
                 context, MY_USER_ID, lockPatternUtils));
         controllers.add(new PinScramblePreferenceController(
                 context, MY_USER_ID, lockPatternUtils));
+        controllers.add(new QuickUnlockPreferenceController(
+                context, MY_USER_ID, lockPatternUtils));
         controllers.add(new OwnerInfoPreferenceController(context, parent));
         return controllers;
     }