9be34298be
This is the short term solution for the downloads root, which does not support directory creation. For the long term solution, we need to add a flag to Root model to check if the root support directory creation or not. BUG=20186663 Change-Id: I15c4795892f38e3f968776f732a6f2160ae775fc
391 lines
14 KiB
Java
391 lines
14 KiB
Java
/*
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* Copyright (C) 2013 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.android.documentsui;
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import static com.android.documentsui.DocumentsActivity.TAG;
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import android.content.ContentProviderClient;
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import android.content.ContentResolver;
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import android.content.Context;
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import android.content.Intent;
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import android.content.pm.ApplicationInfo;
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import android.content.pm.PackageManager;
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import android.content.pm.ProviderInfo;
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import android.content.pm.ResolveInfo;
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import android.database.ContentObserver;
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import android.database.Cursor;
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import android.net.Uri;
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import android.os.AsyncTask;
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import android.os.Handler;
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import android.os.SystemClock;
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import android.provider.DocumentsContract;
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import android.provider.DocumentsContract.Root;
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import android.util.Log;
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import com.android.documentsui.BaseActivity.State;
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import com.android.documentsui.model.RootInfo;
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import com.android.internal.annotations.GuardedBy;
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import com.android.internal.annotations.VisibleForTesting;
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import com.google.android.collect.Lists;
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import com.google.android.collect.Sets;
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import com.google.common.collect.ArrayListMultimap;
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import com.google.common.collect.Multimap;
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import libcore.io.IoUtils;
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import java.util.Collection;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Objects;
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import java.util.concurrent.CountDownLatch;
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import java.util.concurrent.TimeUnit;
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/**
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* Cache of known storage backends and their roots.
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*/
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public class RootsCache {
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private static final boolean LOGD = false;
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public static final Uri sNotificationUri = Uri.parse(
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"content://com.android.documentsui.roots/");
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private final Context mContext;
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private final ContentObserver mObserver;
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private final RootInfo mRecentsRoot = new RootInfo();
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private final Object mLock = new Object();
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private final CountDownLatch mFirstLoad = new CountDownLatch(1);
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@GuardedBy("mLock")
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private Multimap<String, RootInfo> mRoots = ArrayListMultimap.create();
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@GuardedBy("mLock")
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private HashSet<String> mStoppedAuthorities = Sets.newHashSet();
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@GuardedBy("mObservedAuthorities")
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private final HashSet<String> mObservedAuthorities = Sets.newHashSet();
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public RootsCache(Context context) {
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mContext = context;
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mObserver = new RootsChangedObserver();
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}
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private class RootsChangedObserver extends ContentObserver {
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public RootsChangedObserver() {
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super(new Handler());
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}
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@Override
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public void onChange(boolean selfChange, Uri uri) {
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if (LOGD) Log.d(TAG, "Updating roots due to change at " + uri);
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updateAuthorityAsync(uri.getAuthority());
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}
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}
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/**
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* Gather roots from all known storage providers.
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*/
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public void updateAsync() {
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// Special root for recents
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mRecentsRoot.authority = null;
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mRecentsRoot.rootId = null;
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mRecentsRoot.derivedIcon = R.drawable.ic_root_recent;
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mRecentsRoot.flags = Root.FLAG_LOCAL_ONLY | Root.FLAG_SUPPORTS_CREATE
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| Root.FLAG_SUPPORTS_IS_CHILD;
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mRecentsRoot.title = mContext.getString(R.string.root_recent);
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mRecentsRoot.availableBytes = -1;
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new UpdateTask().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
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}
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/**
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* Gather roots from storage providers belonging to given package name.
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*/
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public void updatePackageAsync(String packageName) {
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new UpdateTask(packageName).executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
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}
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/**
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* Gather roots from storage providers belonging to given authority.
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*/
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public void updateAuthorityAsync(String authority) {
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final ProviderInfo info = mContext.getPackageManager().resolveContentProvider(authority, 0);
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if (info != null) {
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updatePackageAsync(info.packageName);
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}
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}
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private void waitForFirstLoad() {
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boolean success = false;
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try {
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success = mFirstLoad.await(15, TimeUnit.SECONDS);
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} catch (InterruptedException e) {
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}
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if (!success) {
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Log.w(TAG, "Timeout waiting for first update");
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}
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}
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/**
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* Load roots from authorities that are in stopped state. Normal
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* {@link UpdateTask} passes ignore stopped applications.
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*/
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private void loadStoppedAuthorities() {
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final ContentResolver resolver = mContext.getContentResolver();
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synchronized (mLock) {
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for (String authority : mStoppedAuthorities) {
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if (LOGD) Log.d(TAG, "Loading stopped authority " + authority);
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mRoots.putAll(authority, loadRootsForAuthority(resolver, authority));
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}
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mStoppedAuthorities.clear();
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}
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}
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private class UpdateTask extends AsyncTask<Void, Void, Void> {
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private final String mFilterPackage;
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private final Multimap<String, RootInfo> mTaskRoots = ArrayListMultimap.create();
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private final HashSet<String> mTaskStoppedAuthorities = Sets.newHashSet();
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/**
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* Update all roots.
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*/
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public UpdateTask() {
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this(null);
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}
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/**
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* Only update roots belonging to given package name. Other roots will
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* be copied from cached {@link #mRoots} values.
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*/
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public UpdateTask(String filterPackage) {
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mFilterPackage = filterPackage;
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}
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@Override
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protected Void doInBackground(Void... params) {
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final long start = SystemClock.elapsedRealtime();
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if (mFilterPackage != null) {
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// Need at least first load, since we're going to be using
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// previously cached values for non-matching packages.
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waitForFirstLoad();
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}
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mTaskRoots.put(mRecentsRoot.authority, mRecentsRoot);
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final ContentResolver resolver = mContext.getContentResolver();
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final PackageManager pm = mContext.getPackageManager();
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// Pick up provider with action string
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final Intent intent = new Intent(DocumentsContract.PROVIDER_INTERFACE);
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final List<ResolveInfo> providers = pm.queryIntentContentProviders(intent, 0);
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for (ResolveInfo info : providers) {
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handleDocumentsProvider(info.providerInfo);
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}
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final long delta = SystemClock.elapsedRealtime() - start;
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Log.d(TAG, "Update found " + mTaskRoots.size() + " roots in " + delta + "ms");
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synchronized (mLock) {
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mRoots = mTaskRoots;
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mStoppedAuthorities = mTaskStoppedAuthorities;
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}
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mFirstLoad.countDown();
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resolver.notifyChange(sNotificationUri, null, false);
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return null;
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}
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private void handleDocumentsProvider(ProviderInfo info) {
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// Ignore stopped packages for now; we might query them
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// later during UI interaction.
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if ((info.applicationInfo.flags & ApplicationInfo.FLAG_STOPPED) != 0) {
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if (LOGD) Log.d(TAG, "Ignoring stopped authority " + info.authority);
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mTaskStoppedAuthorities.add(info.authority);
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return;
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}
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// Try using cached roots if filtering
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boolean cacheHit = false;
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if (mFilterPackage != null && !mFilterPackage.equals(info.packageName)) {
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synchronized (mLock) {
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if (mTaskRoots.putAll(info.authority, mRoots.get(info.authority))) {
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if (LOGD) Log.d(TAG, "Used cached roots for " + info.authority);
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cacheHit = true;
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}
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}
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}
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// Cache miss, or loading everything
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if (!cacheHit) {
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mTaskRoots.putAll(info.authority,
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loadRootsForAuthority(mContext.getContentResolver(), info.authority));
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}
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}
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}
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/**
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* Bring up requested provider and query for all active roots.
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*/
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private Collection<RootInfo> loadRootsForAuthority(ContentResolver resolver, String authority) {
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if (LOGD) Log.d(TAG, "Loading roots for " + authority);
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synchronized (mObservedAuthorities) {
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if (mObservedAuthorities.add(authority)) {
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// Watch for any future updates
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final Uri rootsUri = DocumentsContract.buildRootsUri(authority);
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mContext.getContentResolver().registerContentObserver(rootsUri, true, mObserver);
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}
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}
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final List<RootInfo> roots = Lists.newArrayList();
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final Uri rootsUri = DocumentsContract.buildRootsUri(authority);
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ContentProviderClient client = null;
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Cursor cursor = null;
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try {
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client = DocumentsApplication.acquireUnstableProviderOrThrow(resolver, authority);
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cursor = client.query(rootsUri, null, null, null, null);
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while (cursor.moveToNext()) {
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final RootInfo root = RootInfo.fromRootsCursor(authority, cursor);
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roots.add(root);
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}
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} catch (Exception e) {
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Log.w(TAG, "Failed to load some roots from " + authority + ": " + e);
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} finally {
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IoUtils.closeQuietly(cursor);
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ContentProviderClient.releaseQuietly(client);
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}
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return roots;
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}
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/**
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* Return the requested {@link RootInfo}, but only loading the roots for the
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* requested authority. This is useful when we want to load fast without
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* waiting for all the other roots to come back.
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*/
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public RootInfo getRootOneshot(String authority, String rootId) {
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synchronized (mLock) {
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RootInfo root = getRootLocked(authority, rootId);
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if (root == null) {
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mRoots.putAll(
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authority, loadRootsForAuthority(mContext.getContentResolver(), authority));
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root = getRootLocked(authority, rootId);
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}
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return root;
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}
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}
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public RootInfo getRootBlocking(String authority, String rootId) {
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waitForFirstLoad();
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loadStoppedAuthorities();
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synchronized (mLock) {
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return getRootLocked(authority, rootId);
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}
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}
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private RootInfo getRootLocked(String authority, String rootId) {
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for (RootInfo root : mRoots.get(authority)) {
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if (Objects.equals(root.rootId, rootId)) {
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return root;
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}
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}
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return null;
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}
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public boolean isIconUniqueBlocking(RootInfo root) {
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waitForFirstLoad();
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loadStoppedAuthorities();
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synchronized (mLock) {
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final int rootIcon = root.derivedIcon != 0 ? root.derivedIcon : root.icon;
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for (RootInfo test : mRoots.get(root.authority)) {
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if (Objects.equals(test.rootId, root.rootId)) {
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continue;
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}
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final int testIcon = test.derivedIcon != 0 ? test.derivedIcon : test.icon;
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if (testIcon == rootIcon) {
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return false;
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}
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}
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return true;
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}
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}
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public RootInfo getRecentsRoot() {
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return mRecentsRoot;
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}
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public boolean isRecentsRoot(RootInfo root) {
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return mRecentsRoot == root;
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}
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public Collection<RootInfo> getRootsBlocking() {
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waitForFirstLoad();
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loadStoppedAuthorities();
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synchronized (mLock) {
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return mRoots.values();
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}
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}
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public Collection<RootInfo> getMatchingRootsBlocking(State state) {
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waitForFirstLoad();
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loadStoppedAuthorities();
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synchronized (mLock) {
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return getMatchingRoots(mRoots.values(), state);
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}
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}
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@VisibleForTesting
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static List<RootInfo> getMatchingRoots(Collection<RootInfo> roots, State state) {
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final List<RootInfo> matching = Lists.newArrayList();
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for (RootInfo root : roots) {
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final boolean supportsCreate = (root.flags & Root.FLAG_SUPPORTS_CREATE) != 0;
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final boolean supportsIsChild = (root.flags & Root.FLAG_SUPPORTS_IS_CHILD) != 0;
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final boolean advanced = (root.flags & Root.FLAG_ADVANCED) != 0;
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final boolean localOnly = (root.flags & Root.FLAG_LOCAL_ONLY) != 0;
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final boolean empty = (root.flags & Root.FLAG_EMPTY) != 0;
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// Exclude read-only devices when creating
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if (state.action == State.ACTION_CREATE && !supportsCreate) continue;
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if (state.action == State.ACTION_OPEN_COPY_DESTINATION && !supportsCreate) continue;
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// Exclude roots that don't support directory picking
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if (state.action == State.ACTION_OPEN_TREE && !supportsIsChild) continue;
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// Exclude advanced devices when not requested
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if (!state.showAdvanced && advanced) continue;
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// Exclude non-local devices when local only
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if (state.localOnly && !localOnly) continue;
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// Exclude downloads roots that don't support directory creation
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// TODO: Add flag to check the root supports directory creation or not.
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if (state.directoryCopy && root.isDownloads()) continue;
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// Only show empty roots when creating
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if ((state.action != State.ACTION_CREATE ||
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state.action != State.ACTION_OPEN_TREE ||
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state.action != State.ACTION_OPEN_COPY_DESTINATION) && empty) continue;
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// Only include roots that serve requested content
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final boolean overlap =
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MimePredicate.mimeMatches(root.derivedMimeTypes, state.acceptMimes) ||
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MimePredicate.mimeMatches(state.acceptMimes, root.derivedMimeTypes);
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if (!overlap) {
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continue;
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}
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matching.add(root);
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}
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return matching;
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}
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}
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