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/*
* Copyright (C) 2010 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.gallery3d.data;
import android.content.ContentResolver;
import android.net.Uri;
import android.webkit.MimeTypeMap;
import com.android.gallery3d.app.GalleryApp;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
class UriSource extends MediaSource {
@SuppressWarnings("unused")
private static final String TAG = "UriSource";
private static final String IMAGE_TYPE_PREFIX = "image/";
private static final String IMAGE_TYPE_ANY = "image/*";
private static final String CHARSET_UTF_8 = "utf-8";
private GalleryApp mApplication;
public UriSource(GalleryApp context) {
super("uri");
mApplication = context;
}
@Override
public MediaObject createMediaObject(Path path) {
String segment[] = path.split();
if (segment.length != 3) {
throw new RuntimeException("bad path: " + path);
}
try {
String uri = URLDecoder.decode(segment[1], CHARSET_UTF_8);
String type = URLDecoder.decode(segment[2], CHARSET_UTF_8);
return new UriImage(mApplication, path, Uri.parse(uri), type);
} catch (UnsupportedEncodingException e) {
throw new AssertionError(e);
}
}
private String getMimeType(Uri uri) {
if (ContentResolver.SCHEME_FILE.equals(uri.getScheme())) {
String extension =
MimeTypeMap.getFileExtensionFromUrl(uri.toString());
String type = MimeTypeMap.getSingleton()
.getMimeTypeFromExtension(extension.toLowerCase());
if (type != null) return type;
}
// Assume the type is image if the type cannot be resolved
// This could happen for "http" URI.
String type = mApplication.getContentResolver().getType(uri);
if (type == null) type = "image/*";
return type;
}
@Override
public Path findPathByUri(Uri uri, String type) {
String mimeType = getMimeType(uri);
// Try to find a most specific type but it has to be started with "image/"
if ((type == null) || (IMAGE_TYPE_ANY.equals(type)
&& mimeType.startsWith(IMAGE_TYPE_PREFIX))) {
type = mimeType;
}
if (type.startsWith(IMAGE_TYPE_PREFIX)) {
try {
return Path.fromString("/uri/"
+ URLEncoder.encode(uri.toString(), CHARSET_UTF_8)
+ "/" +URLEncoder.encode(type, CHARSET_UTF_8));
} catch (UnsupportedEncodingException e) {
throw new AssertionError(e);
}
}
// We have no clues that it is an image
return null;
}
}
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