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/*
* Copyright (C) 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.tv.twopanelsettings.slices;
import static android.app.slice.Slice.HINT_PARTIAL;
import android.content.Context;
import android.net.Uri;
import android.view.ContextThemeWrapper;
import androidx.lifecycle.Observer;
import androidx.preference.Preference;
import androidx.slice.Slice;
import androidx.slice.SliceItem;
import androidx.slice.widget.ListContent;
import androidx.slice.widget.SliceContent;
import java.util.List;
/**
* Helper class to handle the updates for embedded slice preferences.
*/
public class EmbeddedSlicePreferenceHelper implements Observer<Slice> {
private final Preference mPreference;
private final Context mContext;
SlicePreferenceListener mListener;
Preference mNewPref;
private String mUri;
private Slice mSlice;
EmbeddedSlicePreferenceHelper(Preference preference, String uri) {
mPreference = preference;
mUri = uri;
mContext = mPreference.getContext();
}
void onAttached() {
getSliceLiveData().observeForever(this);
}
void onDetached() {
getSliceLiveData().removeObserver(this);
}
private PreferenceSliceLiveData.SliceLiveDataImpl getSliceLiveData() {
return ContextSingleton.getInstance()
.getSliceLiveData(mContext, Uri.parse(mUri));
}
@Override
public void onChanged(Slice slice) {
mSlice = slice;
if (slice == null || slice.getHints() == null || slice.getHints().contains(HINT_PARTIAL)) {
updateVisibility(false);
return;
}
update();
}
private void updateVisibility(boolean visible) {
mPreference.setVisible(visible);
if (mListener != null) {
mListener.onChangeVisibility();
}
}
private void update() {
ListContent mListContent = new ListContent(mSlice);
List<SliceContent> items = mListContent.getRowItems();
if (items == null || items.size() == 0) {
updateVisibility(false);
return;
}
SliceItem embeddedItem = SlicePreferencesUtil.getEmbeddedItem(items);
// TODO(b/174691340): Refactor this class and integrate the functionality to TsPreference.
// TODO: Redesign TvSettings project structure so class in twopanelsettings lib can access
// FlavorUtils
// For now, put true or false here does not affect anything as the only related preference
// is not displayed to user anymore.
mNewPref = SlicePreferencesUtil.getPreference(embeddedItem,
(ContextThemeWrapper) mContext, null, false);
if (mNewPref == null) {
updateVisibility(false);
return;
}
updateVisibility(true);
if (mPreference instanceof EmbeddedSlicePreference) {
((EmbeddedSlicePreference) mPreference).update();
} else if (mPreference instanceof EmbeddedSliceSwitchPreference) {
((EmbeddedSliceSwitchPreference) mPreference).update();
}
}
/**
* Implement this if the container needs to do something when embedded slice preference change
* visibility.
**/
public interface SlicePreferenceListener {
/**
* Callback when the preference change visibility
*/
void onChangeVisibility();
}
}
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