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/*
* Copyright (C) 2015 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;
import android.content.ClipData;
import android.content.ClipboardManager;
import android.content.ContentProviderClient;
import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.provider.DocumentsContract;
import android.support.annotation.Nullable;
import android.util.Log;
import com.android.documentsui.model.DocumentInfo;
import libcore.io.IoUtils;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
/**
* ClipboardManager wrapper class providing higher level logical
* support for dealing with Documents.
*/
public final class DocumentClipper {
private static final String TAG = "DocumentClipper";
private Context mContext;
private ClipboardManager mClipboard;
public DocumentClipper(Context context) {
mContext = context;
mClipboard = context.getSystemService(ClipboardManager.class);
}
public boolean hasItemsToPaste() {
if (mClipboard.hasPrimaryClip()) {
ClipData clipData = mClipboard.getPrimaryClip();
int count = clipData.getItemCount();
if (count > 0) {
for (int i = 0; i < count; ++i) {
ClipData.Item item = clipData.getItemAt(i);
Uri uri = item.getUri();
if (isDocumentUri(uri)) {
return true;
}
}
}
}
return false;
}
private boolean isDocumentUri(@Nullable Uri uri) {
return uri != null && DocumentsContract.isDocumentUri(mContext, uri);
}
/**
* Returns a list of Documents as decoded from Clipboard primary clipdata.
* This should be run from inside an AsyncTask.
*/
public List<DocumentInfo> getClippedDocuments() {
ClipData data = mClipboard.getPrimaryClip();
return data == null ? Collections.EMPTY_LIST : getDocumentsFromClipData(data);
}
/**
* Returns a list of Documents as decoded in clipData.
* This should be run from inside an AsyncTask.
*/
public List<DocumentInfo> getDocumentsFromClipData(ClipData clipData) {
assert(clipData != null);
final List<DocumentInfo> srcDocs = new ArrayList<>();
int count = clipData.getItemCount();
if (count == 0) {
return srcDocs;
}
ContentResolver resolver = mContext.getContentResolver();
for (int i = 0; i < count; ++i) {
ClipData.Item item = clipData.getItemAt(i);
Uri itemUri = item.getUri();
if (itemUri != null && DocumentsContract.isDocumentUri(mContext, itemUri)) {
ContentProviderClient client = null;
Cursor cursor = null;
try {
client = DocumentsApplication.acquireUnstableProviderOrThrow(
resolver, itemUri.getAuthority());
cursor = client.query(itemUri, null, null, null, null);
cursor.moveToPosition(0);
srcDocs.add(DocumentInfo.fromCursor(cursor, itemUri.getAuthority()));
} catch (Exception e) {
Log.e(TAG, e.getMessage());
} finally {
IoUtils.closeQuietly(cursor);
ContentProviderClient.releaseQuietly(client);
}
}
}
return srcDocs;
}
/**
* Returns ClipData representing the list of docs, or null if docs is empty,
* or docs cannot be converted.
*/
public @Nullable ClipData getClipDataForDocuments(List<DocumentInfo> docs) {
final ContentResolver resolver = mContext.getContentResolver();
final String[] mimeTypes = getMimeTypes(resolver, docs);
ClipData clipData = null;
for (DocumentInfo doc : docs) {
if (clipData == null) {
// TODO: figure out what this string should be.
// Currently it is not displayed anywhere in the UI, but this might change.
final String label = "";
clipData = new ClipData(label, mimeTypes, new ClipData.Item(doc.derivedUri));
} else {
// TODO: update list of mime types in ClipData.
clipData.addItem(new ClipData.Item(doc.derivedUri));
}
}
return clipData;
}
private static String[] getMimeTypes(ContentResolver resolver, List<DocumentInfo> docs) {
final HashSet<String> mimeTypes = new HashSet<>();
for (DocumentInfo doc : docs) {
assert(doc != null);
assert(doc.derivedUri != null);
final Uri uri = doc.derivedUri;
if ("content".equals(uri.getScheme())) {
mimeTypes.add(resolver.getType(uri));
final String[] streamTypes = resolver.getStreamTypes(uri, "*/*");
if (streamTypes != null) {
mimeTypes.addAll(Arrays.asList(streamTypes));
}
}
}
return mimeTypes.toArray(new String[0]);
}
public void clipDocuments(List<DocumentInfo> docs) {
ClipData data = getClipDataForDocuments(docs);
mClipboard.setPrimaryClip(data);
}
}
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