1 files changed, 127 insertions, 0 deletions
diff --git a/src/com/android/settings/display/TimeoutPreferenceController.java b/src/com/android/settings/display/TimeoutPreferenceController.java
new file mode 100644
index 0000000000..1295a47503
--- /dev/null
+++ b/src/com/android/settings/display/TimeoutPreferenceController.java
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2016 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.display;
+
+import android.app.admin.DevicePolicyManager;
+import android.content.Context;
+import android.os.UserHandle;
+import android.provider.Settings;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceScreen;
+import android.util.Log;
+
+import com.android.settings.R;
+import com.android.settings.TimeoutListPreference;
+import com.android.settings.core.PreferenceController;
+import com.android.settingslib.RestrictedLockUtils;
+
+import static android.provider.Settings.System.SCREEN_OFF_TIMEOUT;
+
+public class TimeoutPreferenceController extends PreferenceController implements
+        Preference.OnPreferenceChangeListener {
+
+    private static final String TAG = "TimeoutPrefContr";
+
+    /** If there is no setting in the provider, use this. */
+    public static final int FALLBACK_SCREEN_TIMEOUT_VALUE = 30000;
+
+    private static final String KEY_SCREEN_TIMEOUT = "screen_timeout";
+
+    public TimeoutPreferenceController(Context context) {
+        super(context);
+    }
+
+    @Override
+    protected boolean isAvailable() {
+        return true;
+    }
+
+    @Override
+    protected String getPreferenceKey() {
+        return KEY_SCREEN_TIMEOUT;
+    }
+
+    @Override
+    public boolean handlePreferenceTreeClick(Preference preference) {
+        return false;
+    }
+
+    @Override
+    public void updateState(PreferenceScreen screen) {
+        final TimeoutListPreference preference =
+                (TimeoutListPreference) screen.findPreference(KEY_SCREEN_TIMEOUT);
+        if (preference == null) {
+            return;
+        }
+        final long currentTimeout = Settings.System.getLong(mContext.getContentResolver(),
+                SCREEN_OFF_TIMEOUT, FALLBACK_SCREEN_TIMEOUT_VALUE);
+        preference.setValue(String.valueOf(currentTimeout));
+        final DevicePolicyManager dpm = (DevicePolicyManager) mContext.getSystemService(
+                Context.DEVICE_POLICY_SERVICE);
+        if (dpm != null) {
+            final RestrictedLockUtils.EnforcedAdmin admin =
+                    RestrictedLockUtils.checkIfMaximumTimeToLockIsSet(mContext);
+            final long maxTimeout =
+                    dpm.getMaximumTimeToLockForUserAndProfiles(UserHandle.myUserId());
+            preference.removeUnusableTimeouts(maxTimeout, admin);
+        }
+        updateTimeoutPreferenceDescription(preference, currentTimeout);
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        try {
+            int value = Integer.parseInt((String) newValue);
+            Settings.System.putInt(mContext.getContentResolver(), SCREEN_OFF_TIMEOUT, value);
+            updateTimeoutPreferenceDescription((TimeoutListPreference) preference, value);
+        } catch (NumberFormatException e) {
+            Log.e(TAG, "could not persist screen timeout setting", e);
+        }
+        return true;
+    }
+
+    public static CharSequence getTimeoutDescription(
+            long currentTimeout, CharSequence[] entries, CharSequence[] values) {
+        if (currentTimeout < 0 || entries == null || values == null
+                || values.length != entries.length) {
+            return null;
+        }
+
+        for (int i = 0; i < values.length; i++) {
+            long timeout = Long.parseLong(values[i].toString());
+            if (currentTimeout == timeout) {
+                return entries[i];
+            }
+        }
+        return null;
+    }
+
+    private void updateTimeoutPreferenceDescription(TimeoutListPreference preference,
+            long currentTimeout) {
+        final CharSequence[] entries = preference.getEntries();
+        final CharSequence[] values = preference.getEntryValues();
+        final String summary;
+        if (preference.isDisabledByAdmin()) {
+            summary = mContext.getString(com.android.settings.R.string.disabled_by_policy_title);
+        } else {
+            final CharSequence timeoutDescription = getTimeoutDescription(
+                    currentTimeout, entries, values);
+            summary = timeoutDescription == null
+                    ? ""
+                    : mContext.getString(R.string.screen_timeout_summary, timeoutDescription);
+        }
+        preference.setSummary(summary);
+    }
+
+}