Settings: Move blur toggle to Display options.

Change-Id: I64cadfd69c66a30ada9f5ba5509dd97a85124326

src/com/android/settings/display/EnableBlursPreferenceController.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2020 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 static android.view.CrossWindowBlurListeners.CROSS_WINDOW_BLUR_SUPPORTED;
+
+import android.content.Context;
+import android.provider.Settings;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.preference.Preference;
+import androidx.preference.TwoStatePreference;
+
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settingslib.core.AbstractPreferenceController;
+
+/**
+ * Controller that toggles window blurs on devices that support it.
+ */
+public final class EnableBlursPreferenceController extends AbstractPreferenceController
+        implements Preference.OnPreferenceChangeListener, PreferenceControllerMixin {
+
+    private static final String ENABLE_BLURS_ON_WINDOWS = "enable_blurs_on_windows";
+    private final boolean mBlurSupported;
+
+    public EnableBlursPreferenceController(Context context) {
+        this(context, CROSS_WINDOW_BLUR_SUPPORTED);
+    }
+
+    @VisibleForTesting
+    public EnableBlursPreferenceController(Context context, boolean blurSupported) {
+        super(context);
+        mBlurSupported = blurSupported;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return ENABLE_BLURS_ON_WINDOWS;
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        boolean enabled = (Boolean) newValue;
+        Settings.Global.putInt(mContext.getContentResolver(),
+                Settings.Global.DISABLE_WINDOW_BLURS, enabled ? 0 : 1);
+        return true;
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return mBlurSupported;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        boolean isEnabled = Settings.Global.getInt(mContext.getContentResolver(),
+                    Settings.Global.DISABLE_WINDOW_BLURS, 0) == 0;
+        ((TwoStatePreference) preference).setChecked(isEnabled);
+    }
+}