87 lines
3.1 KiB
Java
87 lines
3.1 KiB
Java
/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.receivecontent;
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import android.content.ClipData;
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import android.content.ClipDescription;
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import android.net.Uri;
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import android.util.Pair;
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import android.view.ContentInfo;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.function.Predicate;
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final class Utils {
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private Utils() {}
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/**
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* If you use Jetpack, use {@code androidx.core.view.ContentInfoCompat.partition()}.
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*/
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public static Pair<ContentInfo, ContentInfo> partition(ContentInfo payload,
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Predicate<ClipData.Item> itemPredicate) {
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ClipData clip = payload.getClip();
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if (clip.getItemCount() == 1) {
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boolean matched = itemPredicate.test(clip.getItemAt(0));
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return Pair.create(matched ? payload : null, matched ? null : payload);
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}
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ArrayList<ClipData.Item> acceptedItems = new ArrayList<>();
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ArrayList<ClipData.Item> remainingItems = new ArrayList<>();
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for (int i = 0; i < clip.getItemCount(); i++) {
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ClipData.Item item = clip.getItemAt(i);
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if (itemPredicate.test(item)) {
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acceptedItems.add(item);
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} else {
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remainingItems.add(item);
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}
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}
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if (acceptedItems.isEmpty()) {
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return Pair.create(null, payload);
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}
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if (remainingItems.isEmpty()) {
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return Pair.create(payload, null);
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}
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ContentInfo accepted = new ContentInfo.Builder(payload)
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.setClip(buildClipData(new ClipDescription(clip.getDescription()), acceptedItems))
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.build();
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ContentInfo remaining = new ContentInfo.Builder(payload)
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.setClip(buildClipData(new ClipDescription(clip.getDescription()), remainingItems))
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.build();
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return Pair.create(accepted, remaining);
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}
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private static ClipData buildClipData(ClipDescription description,
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List<ClipData.Item> items) {
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ClipData clip = new ClipData(new ClipDescription(description), items.get(0));
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for (int i = 1; i < items.size(); i++) {
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clip.addItem(items.get(i));
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}
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return clip;
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}
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public static List<Uri> collectUris(ClipData clip) {
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List<Uri> uris = new ArrayList<>(clip.getItemCount());
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for (int i = 0; i < clip.getItemCount(); i++) {
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Uri uri = clip.getItemAt(i).getUri();
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if (uri != null) {
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uris.add(uri);
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}
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}
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return uris;
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}
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}
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