Introduce HdcpCheckingPreferenceController

- Create new HdcpCheckingPreferenceController
 - Create controller inside the DashboardFragment
 - Port logic from DevelopmentSettings into the controller

Bug: 34203528
Test: make RunSettingsRoboTests -j40
Change-Id: Id6eed501ce658b55dc4ad38f7408994f70923194

src/com/android/settings/development/HdcpCheckingPreferenceController.java

@@ -0,0 +1,109 @@
+/*
+ * 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.development;
+
+import android.content.Context;
+import android.os.Build;
+import android.os.SystemProperties;
+import android.support.annotation.VisibleForTesting;
+import android.support.v7.preference.ListPreference;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceScreen;
+import android.text.TextUtils;
+
+import com.android.settings.R;
+import com.android.settingslib.development.SystemPropPoker;
+
+public class HdcpCheckingPreferenceController extends
+        DeveloperOptionsPreferenceController implements Preference.OnPreferenceChangeListener {
+
+    private static final String HDCP_CHECKING_KEY = "hdcp_checking";
+
+    @VisibleForTesting
+    static final String HDCP_CHECKING_PROPERTY = "persist.sys.hdcp_checking";
+    @VisibleForTesting
+    static final String USER_BUILD_TYPE = "user";
+
+    private final String[] mListValues;
+    private final String[] mListSummaries;
+    private ListPreference mPreference;
+
+    public HdcpCheckingPreferenceController(Context context) {
+        super(context);
+
+        mListValues = mContext.getResources().getStringArray(R.array.hdcp_checking_values);
+        mListSummaries = mContext.getResources().getStringArray(R.array.hdcp_checking_summaries);
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return !TextUtils.equals(USER_BUILD_TYPE, getBuildType());
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return HDCP_CHECKING_KEY;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+
+        mPreference = (ListPreference) screen.findPreference(getPreferenceKey());
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        SystemProperties.set(HDCP_CHECKING_PROPERTY, newValue.toString());
+        updateHdcpValues();
+        SystemPropPoker.getInstance().poke();
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        updateHdcpValues();
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchEnabled() {
+        mPreference.setEnabled(true);
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchDisabled() {
+        mPreference.setEnabled(false);
+    }
+
+    private void updateHdcpValues() {
+        final String currentValue = SystemProperties.get(HDCP_CHECKING_PROPERTY);
+        int index = 1; // Defaults to drm-only. Needs to match with R.array.hdcp_checking_values
+        for (int i = 0; i < mListValues.length; i++) {
+            if (TextUtils.equals(currentValue, mListValues[i])) {
+                index = i;
+                break;
+            }
+        }
+        mPreference.setValue(mListValues[index]);
+        mPreference.setSummary(mListSummaries[index]);
+    }
+
+    @VisibleForTesting
+    public String getBuildType() {
+        return Build.TYPE;
+    }
+}