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/*
* 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 android.app.slice;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Objects;
import java.util.Queue;
import java.util.Spliterators;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;
/**
* A bunch of utilities for searching the contents of a slice.
* @hide
*/
public class SliceQuery {
private static final String TAG = "SliceQuery";
/**
* @hide
*/
public static SliceItem getPrimaryIcon(Slice slice) {
for (SliceItem item : slice.getItems()) {
if (Objects.equals(item.getFormat(), SliceItem.FORMAT_IMAGE)) {
return item;
}
if (!(compareTypes(item, SliceItem.FORMAT_SLICE)
&& item.hasHint(Slice.HINT_LIST))
&& !item.hasHint(Slice.HINT_ACTIONS)
&& !item.hasHint(Slice.HINT_LIST_ITEM)
&& !compareTypes(item, SliceItem.FORMAT_ACTION)) {
SliceItem icon = SliceQuery.find(item, SliceItem.FORMAT_IMAGE);
if (icon != null) {
return icon;
}
}
}
return null;
}
/**
* @hide
*/
public static SliceItem findNotContaining(SliceItem container, List<SliceItem> list) {
SliceItem ret = null;
while (ret == null && list.size() != 0) {
SliceItem remove = list.remove(0);
if (!contains(container, remove)) {
ret = remove;
}
}
return ret;
}
/**
* @hide
*/
private static boolean contains(SliceItem container, SliceItem item) {
if (container == null || item == null) return false;
return stream(container).filter(s -> (s == item)).findAny().isPresent();
}
/**
* @hide
*/
public static List<SliceItem> findAll(SliceItem s, String type) {
return findAll(s, type, (String[]) null, null);
}
/**
* @hide
*/
public static List<SliceItem> findAll(SliceItem s, String type, String hints, String nonHints) {
return findAll(s, type, new String[]{ hints }, new String[]{ nonHints });
}
/**
* @hide
*/
public static List<SliceItem> findAll(SliceItem s, String type, String[] hints,
String[] nonHints) {
return stream(s).filter(item -> compareTypes(item, type)
&& (item.hasHints(hints) && !item.hasAnyHints(nonHints)))
.collect(Collectors.toList());
}
/**
* @hide
*/
public static SliceItem find(Slice s, String type, String hints, String nonHints) {
return find(s, type, new String[]{ hints }, new String[]{ nonHints });
}
/**
* @hide
*/
public static SliceItem find(Slice s, String type) {
return find(s, type, (String[]) null, null);
}
/**
* @hide
*/
public static SliceItem find(SliceItem s, String type) {
return find(s, type, (String[]) null, null);
}
/**
* @hide
*/
public static SliceItem find(SliceItem s, String type, String hints, String nonHints) {
return find(s, type, new String[]{ hints }, new String[]{ nonHints });
}
/**
* @hide
*/
public static SliceItem find(Slice s, String type, String[] hints, String[] nonHints) {
List<String> h = s.getHints();
return find(new SliceItem(s, SliceItem.FORMAT_SLICE, null, h.toArray(new String[h.size()])),
type, hints, nonHints);
}
/**
* @hide
*/
public static SliceItem find(SliceItem s, String type, String[] hints, String[] nonHints) {
return stream(s).filter(item -> compareTypes(item, type)
&& (item.hasHints(hints) && !item.hasAnyHints(nonHints))).findFirst().orElse(null);
}
/**
* @hide
*/
public static Stream<SliceItem> stream(SliceItem slice) {
Queue<SliceItem> items = new LinkedList();
items.add(slice);
Iterator<SliceItem> iterator = new Iterator<SliceItem>() {
@Override
public boolean hasNext() {
return items.size() != 0;
}
@Override
public SliceItem next() {
SliceItem item = items.poll();
if (compareTypes(item, SliceItem.FORMAT_SLICE)
|| compareTypes(item, SliceItem.FORMAT_ACTION)) {
items.addAll(item.getSlice().getItems());
}
return item;
}
};
return StreamSupport.stream(Spliterators.spliteratorUnknownSize(iterator, 0), false);
}
/**
* @hide
*/
public static boolean compareTypes(SliceItem item, String desiredType) {
final int typeLength = desiredType.length();
if (typeLength == 3 && desiredType.equals("*/*")) {
return true;
}
if (item.getSubType() == null && desiredType.indexOf('/') < 0) {
return item.getFormat().equals(desiredType);
}
return (item.getFormat() + "/" + item.getSubType())
.matches(desiredType.replaceAll("\\*", ".*"));
}
}
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