mirror of
https://github.com/love2d/love-android.git
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Mylah Dee
663 lines
26 KiB
Java
663 lines
26 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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/*
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* Modified for use with LOVE by the LOVE Development Team
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* Copyright (C) 2022 LOVE Development Team
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*/
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package org.love2d.android;
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import static android.os.Build.VERSION.SDK_INT;
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import android.content.res.AssetFileDescriptor;
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import android.database.Cursor;
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import android.database.MatrixCursor;
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import android.graphics.Point;
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import android.os.Build;
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import android.os.CancellationSignal;
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import android.os.Handler;
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import android.os.ParcelFileDescriptor;
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import android.provider.DocumentsContract.Document;
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import android.provider.DocumentsContract.Root;
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import android.provider.DocumentsProvider;
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import android.util.Log;
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import android.webkit.MimeTypeMap;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.util.Collections;
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import java.util.Comparator;
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import java.util.HashSet;
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import java.util.LinkedList;
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import java.util.PriorityQueue;
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import java.util.Set;
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/**
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* Manages documents and exposes them to the Android system for sharing.
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*/
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public class LoveDocumentsProvider extends DocumentsProvider {
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private static final String TAG = "LoveDocumentsProvider";
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// Use these as the default columns to return information about a root if no specific
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// columns are requested in a query.
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private static final String[] DEFAULT_ROOT_PROJECTION = new String[]{
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Root.COLUMN_ROOT_ID,
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Root.COLUMN_MIME_TYPES,
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Root.COLUMN_FLAGS,
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Root.COLUMN_ICON,
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Root.COLUMN_TITLE,
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Root.COLUMN_SUMMARY,
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Root.COLUMN_DOCUMENT_ID,
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Root.COLUMN_AVAILABLE_BYTES
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};
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// Use these as the default columns to return information about a document if no specific
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// columns are requested in a query.
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private static final String[] DEFAULT_DOCUMENT_PROJECTION = new String[]{
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Document.COLUMN_DOCUMENT_ID,
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Document.COLUMN_MIME_TYPE,
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Document.COLUMN_DISPLAY_NAME,
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Document.COLUMN_LAST_MODIFIED,
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Document.COLUMN_FLAGS,
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Document.COLUMN_SIZE
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};
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// No official policy on how many to return, but make sure you do limit the number of recent
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// and search results.
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private static final int MAX_SEARCH_RESULTS = 20;
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private static final int MAX_LAST_MODIFIED = 5;
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private static final String ROOT = "root";
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// This file is the base of our root
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private File mBaseDir;
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@Override
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public boolean onCreate() {
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Log.v(TAG, "onCreate");
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mBaseDir = getContext().getExternalFilesDir(null);
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return true;
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}
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@Override
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public Cursor queryRoots(String[] projection) throws FileNotFoundException {
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Log.v(TAG, "queryRoots");
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// Create a cursor with either the requested fields, or the default projection. This
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// cursor is returned to the Android system picker UI and used to display all roots from
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// this provider.
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final MatrixCursor result = new MatrixCursor(resolveRootProjection(projection));
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// It's possible to have multiple roots
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final MatrixCursor.RowBuilder row = result.newRow();
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row.add(Root.COLUMN_ROOT_ID, ROOT);
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row.add(Root.COLUMN_SUMMARY, null);
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// FLAG_SUPPORTS_CREATE means at least one directory under the root supports creating
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// documents. FLAG_SUPPORTS_RECENTS means your application's most recently used
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// documents will show up in the "Recents" category. FLAG_SUPPORTS_SEARCH allows users
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// to search all documents the application shares. FLAG_SUPPORTS_IS_CHILD allows
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// testing parent child relationships, available after SDK 21 (Lollipop).
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if (SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
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row.add(Root.COLUMN_FLAGS, Root.FLAG_SUPPORTS_CREATE |
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Root.FLAG_SUPPORTS_RECENTS |
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Root.FLAG_SUPPORTS_SEARCH);
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} else {
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row.add(Root.COLUMN_FLAGS, Root.FLAG_SUPPORTS_CREATE |
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Root.FLAG_SUPPORTS_RECENTS |
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Root.FLAG_SUPPORTS_SEARCH |
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Root.FLAG_SUPPORTS_IS_CHILD);
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}
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// COLUMN_TITLE is the root title (e.g. what will be displayed to identify your provider).
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row.add(Root.COLUMN_TITLE, getContext().getApplicationInfo().loadLabel(getContext().getPackageManager()).toString());
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// This document id must be unique within this provider and consistent across time. The
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// system picker UI may save it and refer to it later.
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row.add(Root.COLUMN_DOCUMENT_ID, getDocIdForFile(mBaseDir));
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// The child MIME types are used to filter the roots and only present to the user roots
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// that contain the desired type somewhere in their file hierarchy.
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row.add(Root.COLUMN_MIME_TYPES, "*/*");
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row.add(Root.COLUMN_AVAILABLE_BYTES, mBaseDir.getFreeSpace());
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row.add(Root.COLUMN_ICON, R.drawable.love);
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return result;
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}
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@Override
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public Cursor queryRecentDocuments(String rootId, String[] projection)
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throws FileNotFoundException {
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Log.v(TAG, "queryRecentDocuments");
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// This implementation walks a local file structure to find the most recently
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// modified files.
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// Create a cursor with the requested projection, or the default projection.
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final MatrixCursor result = new MatrixCursor(resolveDocumentProjection(projection));
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final File parent = getFileForDocId(rootId);
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// Create a queue to store the most recent documents, which orders by last modified.
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PriorityQueue<File> lastModifiedFiles = new PriorityQueue<File>(5, new Comparator<File>() {
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public int compare(File i, File j) {
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return Long.compare(i.lastModified(), j.lastModified());
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}
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});
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// Iterate through all files and directories in the file structure under the root. If
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// the file is more recent than the least recently modified, add it to the queue,
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// limiting the number of results.
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final LinkedList<File> pending = new LinkedList<File>();
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// Start by adding the parent to the list of files to be processed
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pending.add(parent);
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// Do while we still have unexamined files
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while (!pending.isEmpty()) {
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// Take a file from the list of unprocessed files
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final File file = pending.removeFirst();
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if (file.isDirectory()) {
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// If it's a directory, add all its children to the unprocessed list
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Collections.addAll(pending, file.listFiles());
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} else {
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// If it's a file, add it to the ordered queue.
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lastModifiedFiles.add(file);
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}
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}
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// Add the most recent files to the cursor, not exceeding the max number of results.
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int includedCount = 0;
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while (includedCount < MAX_LAST_MODIFIED + 1 && !lastModifiedFiles.isEmpty()) {
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final File file = lastModifiedFiles.remove();
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includeFile(result, null, file);
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includedCount++;
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}
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return result;
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}
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@Override
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public Cursor querySearchDocuments(String rootId, String query, String[] projection)
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throws FileNotFoundException {
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Log.v(TAG, "querySearchDocuments");
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// Create a cursor with the requested projection, or the default projection.
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final MatrixCursor result = new MatrixCursor(resolveDocumentProjection(projection));
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final File parent = getFileForDocId(rootId);
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// This implementation searches file names for the query and doesn't rank search
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// results, so we can stop as soon as we find a sufficient number of matches. Other
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// implementations might use other data about files, rather than the file name, to
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// produce a match;
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// Iterate through all files in the file structure under the root until we reach the
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// desired number of matches.
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final LinkedList<File> pending = new LinkedList<File>();
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// Start by adding the parent to the list of files to be processed
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pending.add(parent);
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// Do while we still have unexamined files, and fewer than the max search results
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while (!pending.isEmpty() && result.getCount() < MAX_SEARCH_RESULTS) {
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// Take a file from the list of unprocessed files
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final File file = pending.removeFirst();
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if (file.isDirectory()) {
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// If it's a directory, add all its children to the unprocessed list
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Collections.addAll(pending, file.listFiles());
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} else {
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// If it's a file and it matches, add it to the result cursor.
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if (file.getName().toLowerCase().contains(query)) {
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includeFile(result, null, file);
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}
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}
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}
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return result;
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}
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@Override
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public AssetFileDescriptor openDocumentThumbnail(String documentId, Point sizeHint,
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CancellationSignal signal)
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throws FileNotFoundException {
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Log.v(TAG, "openDocumentThumbnail");
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final File file = getFileForDocId(documentId);
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final ParcelFileDescriptor pfd =
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ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);
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return new AssetFileDescriptor(pfd, 0, AssetFileDescriptor.UNKNOWN_LENGTH);
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}
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@Override
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public Cursor queryDocument(String documentId, String[] projection)
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throws FileNotFoundException {
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Log.v(TAG, "queryDocument");
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// Create a cursor with the requested projection, or the default projection.
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final MatrixCursor result = new MatrixCursor(resolveDocumentProjection(projection));
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includeFile(result, documentId, null);
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return result;
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}
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@Override
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public Cursor queryChildDocuments(String parentDocumentId, String[] projection,
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String sortOrder) throws FileNotFoundException {
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Log.v(TAG, "queryChildDocuments, parentDocumentId: " +
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parentDocumentId +
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" sortOrder: " +
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sortOrder);
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final MatrixCursor result = new MatrixCursor(resolveDocumentProjection(projection));
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final File parent = getFileForDocId(parentDocumentId);
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for (File file : parent.listFiles()) {
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includeFile(result, null, file);
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}
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return result;
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}
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@Override
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public ParcelFileDescriptor openDocument(final String documentId, final String mode, CancellationSignal signal) throws FileNotFoundException {
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Log.v(TAG, "openDocument, mode: " + mode);
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final File file = getFileForDocId(documentId);
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final int accessMode = ParcelFileDescriptor.parseMode(mode);
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return ParcelFileDescriptor.open(file, accessMode);
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}
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public boolean isChildFile(File parentFile, File childFile) {
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File realFileParent = childFile.getParentFile();
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return realFileParent == null || realFileParent.equals(parentFile);
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}
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@Override
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public boolean isChildDocument(String parentDocumentId, String documentId) {
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Log.v(TAG, "isChildDocument");
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if(documentId.startsWith(parentDocumentId)) {
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return true;
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} else {
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return false;
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}
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}
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@Override
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public String createDocument(String documentId, String mimeType, String displayName)
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throws FileNotFoundException {
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Log.v(TAG, "createDocument");
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File parent = getFileForDocId(documentId);
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File file = new File(parent.getPath(), displayName);
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int conflictId = 1;
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while(file.exists()) {
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file = new File(parent.getPath(), displayName + "(" + conflictId++ + ")");
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}
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try {
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// Create the new File to copy into
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boolean wasNewFileCreated = false;
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if (Document.MIME_TYPE_DIR.equals(mimeType)) {
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wasNewFileCreated = file.mkdir();
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} else {
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wasNewFileCreated = file.createNewFile();
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}
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if (!wasNewFileCreated) {
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throw new FileNotFoundException("Failed to create document with name " +
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displayName + " and documentId " + documentId);
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}
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} catch (IOException e) {
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throw new FileNotFoundException("Failed to create document with name " +
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displayName + " and documentId " + documentId);
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}
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return getDocIdForFile(file);
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}
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@Override
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public String renameDocument(String documentId, String displayName)
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throws FileNotFoundException {
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Log.v(TAG, "renameDocument");
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if (displayName == null) {
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throw new FileNotFoundException("Failed to rename document, new name is null");
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}
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// Create the destination file in the same directory as the source file
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File sourceFile = getFileForDocId(documentId);
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File sourceParentFile = sourceFile.getParentFile();
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if (sourceParentFile == null) {
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throw new FileNotFoundException("Failed to rename document. File has no parent.");
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}
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File destFile = new File(sourceParentFile.getPath(), displayName);
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// Try to do the rename
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try {
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boolean renameSucceeded = sourceFile.renameTo(destFile);
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if (!renameSucceeded) {
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throw new FileNotFoundException("Failed to rename document. Renamed failed.");
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}
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} catch (Exception e) {
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Log.w(TAG, "Rename exception : " + e.getLocalizedMessage() + e.getCause());
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throw new FileNotFoundException("Failed to rename document. Error: " + e.getMessage());
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}
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return getDocIdForFile(destFile);
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}
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@Override
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public void deleteDocument(String documentId) throws FileNotFoundException {
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Log.v(TAG, "deleteDocument");
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File file = getFileForDocId(documentId);
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if (file.delete()) {
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Log.i(TAG, "Deleted file with id " + documentId);
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} else {
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throw new FileNotFoundException("Failed to delete document with id " + documentId);
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}
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}
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@Override
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public void removeDocument(String documentId, String parentDocumentId)
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throws FileNotFoundException {
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Log.v(TAG, "removeDocument");
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File parent = getFileForDocId(parentDocumentId);
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File file = getFileForDocId(documentId);
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if (file == null) {
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throw new FileNotFoundException("Failed to delete document with id " + documentId);
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}
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// removeDocument is the same as deleteDocument but allows the parent to be specified
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// Check here if the specified parentDocumentId matches the true parent of documentId
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boolean doesFileParentMatch = false;
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File fileParent = file.getParentFile();
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if (fileParent == null || fileParent.equals(parent)) {
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doesFileParentMatch = true;
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}
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// Remove the file if parent matches or file and parent are equal
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if (parent.equals(file) || doesFileParentMatch) {
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if (file.delete()) {
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Log.i(TAG, "Deleted file with id " + documentId);
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} else {
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throw new FileNotFoundException("Failed to delete document with id " + documentId);
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}
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} else {
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throw new FileNotFoundException("Failed to delete document with id " + documentId);
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}
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}
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/**
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* overload copyDocument to insist that the parent matches
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*/
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public String copyDocument(String sourceDocumentId, String sourceParentDocumentId,
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String targetParentDocumentId) throws FileNotFoundException {
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Log.v(TAG, "copyDocument with document parent");
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if (!isChildDocument(sourceParentDocumentId, sourceDocumentId)) {
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throw new FileNotFoundException("Failed to copy document with id " +
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sourceDocumentId + ". Parent is not: " + sourceParentDocumentId);
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}
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return copyDocument(sourceDocumentId, targetParentDocumentId);
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}
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@Override
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public String copyDocument(String sourceDocumentId, String targetParentDocumentId)
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throws FileNotFoundException {
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Log.v(TAG, "copyDocument");
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File parent = getFileForDocId(targetParentDocumentId);
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File oldFile = getFileForDocId(sourceDocumentId);
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File newFile = new File(parent.getPath(), oldFile.getName());
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try {
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int conflictId = 1;
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while(newFile.exists()) {
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newFile = new File(parent.getPath(), oldFile.getName() + "(" + conflictId++ + ")");
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}
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// Create the new File to copy into
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boolean wasNewFileCreated = false;
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boolean isDirectory = Document.MIME_TYPE_DIR.equals(getTypeForFile(oldFile));
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if(isDirectory) {
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if (newFile.mkdir()) {
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if (newFile.setWritable(true) && newFile.setReadable(true)) {
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wasNewFileCreated = true;
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}
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}
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} else {
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if (newFile.createNewFile()) {
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if (newFile.setWritable(true) && newFile.setReadable(true)) {
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wasNewFileCreated = true;
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}
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}
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}
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if (!wasNewFileCreated) {
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throw new FileNotFoundException("Failed to copy document " + sourceDocumentId +
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". Could not create new file.");
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}
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if(!isDirectory) {
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// Copy the bytes into the new file
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try (InputStream inStream = new FileInputStream(oldFile)) {
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try (OutputStream outStream = new FileOutputStream(newFile)) {
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// Transfer bytes from in to out
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byte[] buf = new byte[16384]; // disk: 8-64k
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int len;
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while ((len = inStream.read(buf)) > 0) {
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outStream.write(buf, 0, len);
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}
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}
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}
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}
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} catch (IOException e) {
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throw new FileNotFoundException("Failed to copy document: " + sourceDocumentId +
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". " + e.getMessage());
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}
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return getDocIdForFile(newFile);
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}
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@Override
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public String moveDocument(String sourceDocumentId, String sourceParentDocumentId,
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String targetParentDocumentId) throws FileNotFoundException {
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Log.v(TAG, "moveDocument");
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try {
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// Copy document, insisting that the parent is correct
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String newDocumentId = copyDocument(sourceDocumentId, sourceParentDocumentId,
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targetParentDocumentId);
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// Remove old document
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removeDocument(sourceDocumentId, sourceParentDocumentId);
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return newDocumentId;
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} catch (FileNotFoundException e) {
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throw new FileNotFoundException("Failed to move document " + sourceDocumentId);
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}
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}
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@Override
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public String getDocumentType(String documentId) throws FileNotFoundException {
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File file = getFileForDocId(documentId);
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return getTypeForFile(file);
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}
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/**
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* @param projection the requested root column projection
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* @return either the requested root column projection, or the default projection if the
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* requested projection is null.
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*/
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private static String[] resolveRootProjection(String[] projection) {
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return projection != null ? projection : DEFAULT_ROOT_PROJECTION;
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}
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private static String[] resolveDocumentProjection(String[] projection) {
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return projection != null ? projection : DEFAULT_DOCUMENT_PROJECTION;
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}
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/**
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* Get a file's MIME type
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|
*
|
|
* @param file the File object whose type we want
|
|
* @return the MIME type of the file
|
|
*/
|
|
private static String getTypeForFile(File file) {
|
|
if (file.isDirectory()) {
|
|
return Document.MIME_TYPE_DIR;
|
|
} else {
|
|
return getTypeForName(file.getName());
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the MIME data type of a document, given its filename.
|
|
*
|
|
* @param name the filename of the document
|
|
* @return the MIME data type of a document
|
|
*/
|
|
private static String getTypeForName(String name) {
|
|
final int lastDot = name.lastIndexOf('.');
|
|
if (lastDot >= 0) {
|
|
final String extension = name.substring(lastDot + 1);
|
|
if(extension == "love") {
|
|
return "application/x-love-game";
|
|
}
|
|
final String mime = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);
|
|
if (mime != null) {
|
|
return mime;
|
|
}
|
|
}
|
|
return "application/octet-stream";
|
|
}
|
|
|
|
/**
|
|
* Get the document ID given a File. The document id must be consistent across time. Other
|
|
* applications may save the ID and use it to reference documents later.
|
|
* <p/>
|
|
* This implementation is specific to this demo. It assumes only one root and is built
|
|
* directly from the file structure. However, it is possible for a document to be a child of
|
|
* multiple directories (for example "android" and "images"), in which case the file must have
|
|
* the same consistent, unique document ID in both cases.
|
|
*
|
|
* @param file the File whose document ID you want
|
|
* @return the corresponding document ID
|
|
*/
|
|
private String getDocIdForFile(File file) {
|
|
String path = file.getAbsolutePath();
|
|
|
|
// Start at first char of path under root
|
|
final String rootPath = mBaseDir.getPath();
|
|
if (rootPath.equals(path)) {
|
|
path = "";
|
|
} else if (rootPath.endsWith("/")) {
|
|
path = path.substring(rootPath.length());
|
|
} else {
|
|
path = path.substring(rootPath.length() + 1);
|
|
}
|
|
|
|
return ROOT + ':' + path;
|
|
}
|
|
|
|
/**
|
|
* Add a representation of a file to a cursor.
|
|
*
|
|
* @param result the cursor to modify
|
|
* @param docId the document ID representing the desired file (may be null if given file)
|
|
* @param file the File object representing the desired file (may be null if given docID)
|
|
* @throws FileNotFoundException
|
|
*/
|
|
private void includeFile(MatrixCursor result, String docId, File file)
|
|
throws FileNotFoundException {
|
|
if (docId == null) {
|
|
docId = getDocIdForFile(file);
|
|
} else {
|
|
file = getFileForDocId(docId);
|
|
}
|
|
|
|
int flags = 0;
|
|
|
|
if (file.isDirectory()) {
|
|
// Add FLAG_DIR_SUPPORTS_CREATE if the file is a writable directory.
|
|
if (file.isDirectory() && file.canWrite()) {
|
|
flags |= Document.FLAG_DIR_SUPPORTS_CREATE;
|
|
}
|
|
} else if (file.canWrite()) {
|
|
// If the file is writable set FLAG_SUPPORTS_WRITE and
|
|
// FLAG_SUPPORTS_DELETE
|
|
flags |= Document.FLAG_SUPPORTS_WRITE;
|
|
flags |= Document.FLAG_SUPPORTS_DELETE;
|
|
|
|
// Add SDK specific flags if appropriate
|
|
if (SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
|
|
flags |= Document.FLAG_SUPPORTS_RENAME;
|
|
}
|
|
if (SDK_INT >= Build.VERSION_CODES.N) {
|
|
flags |= Document.FLAG_SUPPORTS_REMOVE;
|
|
flags |= Document.FLAG_SUPPORTS_MOVE;
|
|
flags |= Document.FLAG_SUPPORTS_COPY;
|
|
}
|
|
}
|
|
|
|
final String displayName = file.getName();
|
|
final String mimeType = getTypeForFile(file);
|
|
|
|
if (mimeType.startsWith("image/")) {
|
|
// Allow the image to be represented by a thumbnail rather than an icon
|
|
flags |= Document.FLAG_SUPPORTS_THUMBNAIL;
|
|
}
|
|
|
|
final MatrixCursor.RowBuilder row = result.newRow();
|
|
row.add(Document.COLUMN_DOCUMENT_ID, docId);
|
|
if(file.getAbsolutePath() == mBaseDir.getAbsolutePath()) {
|
|
row.add(Document.COLUMN_DISPLAY_NAME, getContext().getApplicationInfo().loadLabel(getContext().getPackageManager()).toString());
|
|
} else {
|
|
row.add(Document.COLUMN_DISPLAY_NAME, displayName);
|
|
}
|
|
row.add(Document.COLUMN_SIZE, file.length());
|
|
row.add(Document.COLUMN_MIME_TYPE, mimeType);
|
|
row.add(Document.COLUMN_LAST_MODIFIED, file.lastModified());
|
|
row.add(Document.COLUMN_FLAGS, flags);
|
|
|
|
// Add a custom icon
|
|
if(mimeType == "application/x-love-game") {
|
|
row.add(Document.COLUMN_ICON, R.drawable.love);
|
|
} else {
|
|
row.add(Document.COLUMN_ICON, null);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Translate your custom URI scheme into a File object.
|
|
*
|
|
* @param docId the document ID representing the desired file
|
|
* @return a File represented by the given document ID
|
|
* @throws java.io.FileNotFoundException
|
|
*/
|
|
private File getFileForDocId(String docId) throws FileNotFoundException {
|
|
File target = mBaseDir;
|
|
if (docId.equals(ROOT)) {
|
|
return target;
|
|
}
|
|
final int splitIndex = docId.indexOf(':', 1);
|
|
if (splitIndex < 0) {
|
|
throw new FileNotFoundException("Missing root for " + docId);
|
|
} else {
|
|
final String path = docId.substring(splitIndex + 1);
|
|
target = new File(target, path);
|
|
if (!target.exists()) {
|
|
throw new FileNotFoundException("Missing file for " + docId + " at " + target);
|
|
}
|
|
return target;
|
|
}
|
|
}
|
|
} |