blob: a08637c9d48d6283a56f34c0d8dc30a6952df708 [file] [log] [blame]
/*
* 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.documentsui.sidebar;
import android.app.Activity;
import android.os.Looper;
import android.view.View;
import android.view.View.OnDragListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import com.android.documentsui.R;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* The adapter for the {@link android.widget.ListView} in sidebar. It contains the list of
* {@link Item}s and provides sub-views to {@link android.widget.ListView}.
*/
class RootsAdapter extends ArrayAdapter<Item> {
private static final int TYPE_ROOT = 0;
private static final int TYPE_APP = 1;
private static final int TYPE_ROOT_AND_APP = 2;
private static final int TYPE_SPACER = 3;
private static final Map<String, Long> sIdMap = new HashMap<>();
// the next available id to associate with a new string id
private static long sNextAvailableId;
private final OnDragListener mDragListener;
public RootsAdapter(
Activity activity,
List<Item> items,
OnDragListener dragListener) {
super(activity, 0, items);
mDragListener = dragListener;
}
@Override
public boolean hasStableIds() {
return true;
}
@Override
public long getItemId(int position) {
// Ensure this method is only called in main thread because we don't have any
// concurrency protection.
assert(Looper.myLooper() == Looper.getMainLooper());
String stringId = getItem(position).stringId;
long id;
if (sIdMap.containsKey(stringId)) {
id = sIdMap.get(stringId);
} else {
id = sNextAvailableId++;
sIdMap.put(stringId, id);
}
return id;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final Item item = getItem(position);
final View view = item.getView(convertView, parent);
if (item.isRoot()) {
view.setTag(R.id.item_position_tag, position);
view.setOnDragListener(mDragListener);
} else {
view.setTag(R.id.item_position_tag, null);
view.setOnDragListener(null);
}
return view;
}
@Override
public boolean areAllItemsEnabled() {
return false;
}
@Override
public boolean isEnabled(int position) {
return getItemViewType(position) != TYPE_SPACER;
}
@Override
public int getItemViewType(int position) {
final Item item = getItem(position);
if (item instanceof RootAndAppItem) {
return TYPE_ROOT_AND_APP;
} else if (item instanceof RootItem) {
return TYPE_ROOT;
} else if (item instanceof AppItem) {
return TYPE_APP;
} else {
return TYPE_SPACER;
}
}
@Override
public int getViewTypeCount() {
return 4;
}
}