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/*
* Copyright (C) 2019 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.keyguard.clock;
import android.content.ContentProvider;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.MatrixCursor;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.ParcelFileDescriptor;
import android.os.ParcelFileDescriptor.AutoCloseOutputStream;
import android.text.TextUtils;
import android.util.Log;
import com.android.internal.annotations.VisibleForTesting;
import java.io.FileNotFoundException;
import java.util.List;
import javax.inject.Inject;
import javax.inject.Provider;
/**
* Exposes custom clock face options and provides realistic preview images.
*
* APIs:
*
* /list_options: List the available clock faces, which has the following columns
* name: name of the clock face
* title: title of the clock face
* id: value used to set the clock face
* thumbnail: uri of the thumbnail image, should be /thumbnail/{name}
* preview: uri of the preview image, should be /preview/{name}
*
* /thumbnail/{id}: Opens a file stream for the thumbnail image for clock face {id}.
*
* /preview/{id}: Opens a file stream for the preview image for clock face {id}.
*/
public final class ClockOptionsProvider extends ContentProvider {
private static final String TAG = "ClockOptionsProvider";
private static final String KEY_LIST_OPTIONS = "/list_options";
private static final String KEY_PREVIEW = "preview";
private static final String KEY_THUMBNAIL = "thumbnail";
private static final String COLUMN_NAME = "name";
private static final String COLUMN_TITLE = "title";
private static final String COLUMN_ID = "id";
private static final String COLUMN_THUMBNAIL = "thumbnail";
private static final String COLUMN_PREVIEW = "preview";
private static final String MIME_TYPE_PNG = "image/png";
private static final String CONTENT_SCHEME = "content";
private static final String AUTHORITY = "com.android.keyguard.clock";
@Inject
public Provider<List<ClockInfo>> mClockInfosProvider;
@VisibleForTesting
ClockOptionsProvider(Provider<List<ClockInfo>> clockInfosProvider) {
mClockInfosProvider = clockInfosProvider;
}
@Override
public boolean onCreate() {
return true;
}
@Override
public String getType(Uri uri) {
List<String> segments = uri.getPathSegments();
if (segments.size() > 0 && (KEY_PREVIEW.equals(segments.get(0))
|| KEY_THUMBNAIL.equals(segments.get(0)))) {
return MIME_TYPE_PNG;
}
return "vnd.android.cursor.dir/clock_faces";
}
@Override
public Cursor query(Uri uri, String[] projection, String selection,
String[] selectionArgs, String sortOrder) {
if (!KEY_LIST_OPTIONS.equals(uri.getPath())) {
return null;
}
MatrixCursor cursor = new MatrixCursor(new String[] {
COLUMN_NAME, COLUMN_TITLE, COLUMN_ID, COLUMN_THUMBNAIL, COLUMN_PREVIEW});
List<ClockInfo> clocks = mClockInfosProvider.get();
for (int i = 0; i < clocks.size(); i++) {
ClockInfo clock = clocks.get(i);
cursor.newRow()
.add(COLUMN_NAME, clock.getName())
.add(COLUMN_TITLE, clock.getTitle())
.add(COLUMN_ID, clock.getId())
.add(COLUMN_THUMBNAIL, createThumbnailUri(clock))
.add(COLUMN_PREVIEW, createPreviewUri(clock));
}
return cursor;
}
@Override
public Uri insert(Uri uri, ContentValues initialValues) {
return null;
}
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
return 0;
}
@Override
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
return 0;
}
@Override
public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException {
List<String> segments = uri.getPathSegments();
if (segments.size() != 2 || !(KEY_PREVIEW.equals(segments.get(0))
|| KEY_THUMBNAIL.equals(segments.get(0)))) {
throw new FileNotFoundException("Invalid preview url");
}
String id = segments.get(1);
if (TextUtils.isEmpty(id)) {
throw new FileNotFoundException("Invalid preview url, missing id");
}
ClockInfo clock = null;
List<ClockInfo> clocks = mClockInfosProvider.get();
for (int i = 0; i < clocks.size(); i++) {
if (id.equals(clocks.get(i).getId())) {
clock = clocks.get(i);
break;
}
}
if (clock == null) {
throw new FileNotFoundException("Invalid preview url, id not found");
}
return openPipeHelper(uri, MIME_TYPE_PNG, null, KEY_PREVIEW.equals(segments.get(0))
? clock.getPreview() : clock.getThumbnail(), new MyWriter());
}
private Uri createThumbnailUri(ClockInfo clock) {
return new Uri.Builder()
.scheme(CONTENT_SCHEME)
.authority(AUTHORITY)
.appendPath(KEY_THUMBNAIL)
.appendPath(clock.getId())
.build();
}
private Uri createPreviewUri(ClockInfo clock) {
return new Uri.Builder()
.scheme(CONTENT_SCHEME)
.authority(AUTHORITY)
.appendPath(KEY_PREVIEW)
.appendPath(clock.getId())
.build();
}
private static class MyWriter implements ContentProvider.PipeDataWriter<Bitmap> {
@Override
public void writeDataToPipe(ParcelFileDescriptor output, Uri uri, String mimeType,
Bundle opts, Bitmap bitmap) {
try (AutoCloseOutputStream os = new AutoCloseOutputStream(output)) {
bitmap.compress(Bitmap.CompressFormat.PNG, 100, os);
} catch (Exception e) {
Log.w(TAG, "fail to write to pipe", e);
}
}
}
}
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