Add a new widget MasterCheckBoxPreference.

This is similar to the master switch preference, but instead of the
toggle button, it provides a checkbox as the preference widget.

Change-Id: Ic2392f6a828298ab85494e7dd127fd2d787ce121
Fixes: 71603100
Test: make RunSettingsRoboTests
diff --git a/res/layout/preference_widget_master_checkbox.xml b/res/layout/preference_widget_master_checkbox.xml
new file mode 100644
index 0000000..e61839d
--- /dev/null
+++ b/res/layout/preference_widget_master_checkbox.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright (C) 2018 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.
+  -->
+
+<CheckBox
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/checkboxWidget"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:gravity="center"
+    android:layout_marginStart="?android:attr/listPreferredItemPaddingEnd"
+    android:layout_marginEnd="?android:attr/listPreferredItemPaddingEnd"
+    android:clickable="false" />
diff --git a/src/com/android/settings/widget/MasterCheckBoxPreference.java b/src/com/android/settings/widget/MasterCheckBoxPreference.java
new file mode 100644
index 0000000..333c9aa
--- /dev/null
+++ b/src/com/android/settings/widget/MasterCheckBoxPreference.java
@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2018 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.widget;
+
+import android.content.Context;
+import android.support.v7.preference.PreferenceViewHolder;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.CheckBox;
+
+import com.android.settings.R;
+import com.android.settingslib.TwoTargetPreference;
+
+/**
+ * A custom preference that provides inline checkbox. It has a mandatory field for title, and
+ * optional fields for icon and sub-text.
+ */
+public class MasterCheckBoxPreference extends TwoTargetPreference {
+
+    private CheckBox mCheckBox;
+    private boolean mChecked;
+
+    public MasterCheckBoxPreference(Context context, AttributeSet attrs,
+            int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+    }
+
+    public MasterCheckBoxPreference(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    public MasterCheckBoxPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public MasterCheckBoxPreference(Context context) {
+        super(context);
+    }
+
+    @Override
+    protected int getSecondTargetResId() {
+        return R.layout.preference_widget_master_checkbox;
+    }
+
+    @Override
+    public void onBindViewHolder(PreferenceViewHolder holder) {
+        super.onBindViewHolder(holder);
+        final View widgetView = holder.findViewById(android.R.id.widget_frame);
+        if (widgetView != null) {
+            widgetView.setOnClickListener(new OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    if (mCheckBox != null && !mCheckBox.isEnabled()) {
+                        return;
+                    }
+                    setChecked(!mChecked);
+                    if (!callChangeListener(mChecked)) {
+                        setChecked(!mChecked);
+                    } else {
+                        persistBoolean(mChecked);
+                    }
+                }
+            });
+        }
+
+        mCheckBox = (CheckBox) holder.findViewById(R.id.checkboxWidget);
+        if (mCheckBox != null) {
+            mCheckBox.setContentDescription(getTitle());
+            mCheckBox.setChecked(mChecked);
+        }
+    }
+
+    @Override
+    public void setEnabled(boolean enabled) {
+        super.setEnabled(enabled);
+        if (mCheckBox != null) {
+            mCheckBox.setEnabled(enabled);
+        }
+    }
+
+    public boolean isChecked() {
+        return mCheckBox != null && mChecked;
+    }
+
+    public void setChecked(boolean checked) {
+        mChecked = checked;
+        if (mCheckBox != null) {
+            mCheckBox.setChecked(checked);
+        }
+    }
+
+    public CheckBox getCheckBox() {
+        return mCheckBox;
+    }
+}
diff --git a/tests/robotests/src/com/android/settings/widget/MasterCheckBoxPreferenceTest.java b/tests/robotests/src/com/android/settings/widget/MasterCheckBoxPreferenceTest.java
new file mode 100644
index 0000000..e6530d5
--- /dev/null
+++ b/tests/robotests/src/com/android/settings/widget/MasterCheckBoxPreferenceTest.java
@@ -0,0 +1,154 @@
+/*
+ * Copyright (C) 2018 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.widget;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+
+import android.content.Context;
+import android.support.v7.preference.Preference.OnPreferenceChangeListener;
+import android.support.v7.preference.PreferenceViewHolder;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.LinearLayout;
+import android.widget.CheckBox;
+
+import com.android.settings.R;
+import com.android.settings.TestConfig;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class MasterCheckBoxPreferenceTest {
+
+    private Context mContext;
+    private MasterCheckBoxPreference mPreference;
+
+    @Before
+    public void setUp() {
+        mContext = RuntimeEnvironment.application;
+        mPreference = new MasterCheckBoxPreference(mContext);
+    }
+
+    @Test
+    public void createNewPreference_shouldSetLayout() {
+        assertThat(mPreference.getWidgetLayoutResource())
+                .isEqualTo(R.layout.preference_widget_master_checkbox);
+    }
+
+    @Test
+    public void setChecked_shouldUpdateCheckBoxCheckedState() {
+        final PreferenceViewHolder holder = PreferenceViewHolder.createInstanceForTests(
+                LayoutInflater.from(mContext).inflate(
+                  R.layout.preference_widget_master_checkbox, null));
+        final CheckBox checkBox = (CheckBox) holder.findViewById(R.id.checkboxWidget);
+        mPreference.onBindViewHolder(holder);
+
+        mPreference.setChecked(true);
+        assertThat(checkBox.isChecked()).isTrue();
+
+        mPreference.setChecked(false);
+        assertThat(checkBox.isChecked()).isFalse();
+    }
+
+    @Test
+    public void setEnabled_shouldUpdateCheckBoxEnabledState() {
+        final PreferenceViewHolder holder = PreferenceViewHolder.createInstanceForTests(
+                LayoutInflater.from(mContext).inflate(
+                  R.layout.preference_widget_master_checkbox, null));
+        final CheckBox checkBox = (CheckBox) holder.findViewById(R.id.checkboxWidget);
+        mPreference.onBindViewHolder(holder);
+
+        mPreference.setEnabled(true);
+        assertThat(checkBox.isEnabled()).isTrue();
+
+        mPreference.setEnabled(false);
+        assertThat(checkBox.isEnabled()).isFalse();
+    }
+
+    @Test
+    public void clickWidgetView_shouldToggleCheckBox() {
+        final LayoutInflater inflater = LayoutInflater.from(mContext);
+        final PreferenceViewHolder holder = PreferenceViewHolder.createInstanceForTests(
+                inflater.inflate(R.layout.preference_two_target, null));
+        final LinearLayout widgetView = holder.itemView.findViewById(android.R.id.widget_frame);
+        inflater.inflate(R.layout.preference_widget_master_checkbox, widgetView, true);
+        final CheckBox checkBox = (CheckBox) holder.findViewById(R.id.checkboxWidget);
+        mPreference.onBindViewHolder(holder);
+
+        widgetView.performClick();
+        assertThat(checkBox.isChecked()).isTrue();
+
+        widgetView.performClick();
+        assertThat(checkBox.isChecked()).isFalse();
+    }
+
+    @Test
+    public void clickWidgetView_shouldNotToggleCheckBoxIfDisabled() {
+        final LayoutInflater inflater = LayoutInflater.from(mContext);
+        final PreferenceViewHolder holder = PreferenceViewHolder.createInstanceForTests(
+                inflater.inflate(R.layout.preference_two_target, null));
+        final LinearLayout widgetView = holder.itemView.findViewById(android.R.id.widget_frame);
+        inflater.inflate(R.layout.preference_widget_master_checkbox, widgetView, true);
+        final CheckBox checkBox = (CheckBox) holder.findViewById(R.id.checkboxWidget);
+        mPreference.onBindViewHolder(holder);
+        mPreference.setEnabled(false);
+
+        widgetView.performClick();
+        assertThat(checkBox.isChecked()).isFalse();
+    }
+
+    @Test
+    public void clickWidgetView_shouldNotifyPreferenceChanged() {
+        final PreferenceViewHolder holder = PreferenceViewHolder.createInstanceForTests(
+                LayoutInflater.from(mContext).inflate(R.layout.preference_two_target, null));
+        final View widgetView = holder.findViewById(android.R.id.widget_frame);
+        final OnPreferenceChangeListener listener = mock(OnPreferenceChangeListener.class);
+        mPreference.setOnPreferenceChangeListener(listener);
+        mPreference.onBindViewHolder(holder);
+
+        mPreference.setChecked(false);
+        widgetView.performClick();
+        verify(listener).onPreferenceChange(mPreference, true);
+
+        mPreference.setChecked(true);
+        widgetView.performClick();
+        verify(listener).onPreferenceChange(mPreference, false);
+    }
+
+    @Test
+    public void onBindViewHolder_checkBoxShouldHaveContentDescription() {
+        final PreferenceViewHolder holder = PreferenceViewHolder.createInstanceForTests(
+            LayoutInflater.from(mContext)
+                .inflate(R.layout.preference_widget_master_checkbox, null));
+        final CheckBox checkBox = (CheckBox) holder.findViewById(R.id.checkboxWidget);
+        final String label = "TestButton";
+        mPreference.setTitle(label);
+
+        mPreference.onBindViewHolder(holder);
+
+        assertThat(checkBox.getContentDescription()).isEqualTo(label);
+    }
+}