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/*
* Copyright (C) 2013 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.camera.app;
import android.content.Context;
import android.graphics.BitmapFactory;
import android.location.Location;
import android.net.Uri;
import com.android.camera.ImageTaskManager;
import com.android.camera.Storage;
import com.android.camera.exif.ExifInterface;
import com.android.camera.util.CameraUtil;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.Iterator;
public class PlaceholderManager implements ImageTaskManager {
private static final String TAG = "PlaceholderManager";
public static final String PLACEHOLDER_MIME_TYPE = "application/placeholder-image";
private final Context mContext;
final private ArrayList<WeakReference<TaskListener>> mListenerRefs;
public static class Session {
String outputTitle;
Uri outputUri;
long time;
Session(String title, Uri uri, long timestamp) {
outputTitle = title;
outputUri = uri;
time = timestamp;
}
}
public PlaceholderManager(Context context) {
mContext = context;
mListenerRefs = new ArrayList<WeakReference<TaskListener>>();
}
@Override
public void addTaskListener(TaskListener l) {
synchronized (mListenerRefs) {
if (findTaskListener(l) == -1) {
mListenerRefs.add(new WeakReference<TaskListener>(l));
}
}
}
@Override
public void removeTaskListener(TaskListener l) {
synchronized (mListenerRefs) {
int i = findTaskListener(l);
if (i != -1) {
mListenerRefs.remove(i);
}
}
}
@Override
public int getTaskProgress(Uri uri) {
return 0;
}
private int findTaskListener(TaskListener listener) {
int index = -1;
for (int i = 0; i < mListenerRefs.size(); i++) {
TaskListener l = mListenerRefs.get(i).get();
if (l != null && l == listener) {
index = i;
break;
}
}
return index;
}
private Iterable<TaskListener> getListeners() {
return new Iterable<TaskListener>() {
@Override
public Iterator<TaskListener> iterator() {
return new ListenerIterator();
}
};
}
private class ListenerIterator implements Iterator<TaskListener> {
private int mIndex = 0;
private TaskListener mNext = null;
@Override
public boolean hasNext() {
while (mNext == null && mIndex < mListenerRefs.size()) {
mNext = mListenerRefs.get(mIndex).get();
if (mNext == null) {
mListenerRefs.remove(mIndex);
}
}
return mNext != null;
}
@Override
public TaskListener next() {
hasNext(); // Populates mNext
mIndex++;
TaskListener next = mNext;
mNext = null;
return next;
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
}
public Session insertPlaceholder(String title, byte[] placeholder, long timestamp) {
if (title == null || placeholder == null) {
throw new IllegalArgumentException("Null argument passed to insertPlaceholder");
}
// Decode bounds
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeByteArray(placeholder, 0, placeholder.length, options);
int width = options.outWidth;
int height = options.outHeight;
if (width <= 0 || height <= 0) {
throw new IllegalArgumentException("Image had bad height/width");
}
Uri uri =
Storage.addImage(mContext.getContentResolver(), title, timestamp, null, 0, null,
placeholder, width, height, PLACEHOLDER_MIME_TYPE);
if (uri == null) {
return null;
}
String filePath = uri.getPath();
synchronized (mListenerRefs) {
for (TaskListener l : getListeners()) {
l.onTaskQueued(filePath, uri);
}
}
return new Session(title, uri, timestamp);
}
public void replacePlaceholder(Session session, Location location, int orientation,
ExifInterface exif, byte[] jpeg, int width, int height, String mimeType) {
Storage.updateImage(session.outputUri, mContext.getContentResolver(), session.outputTitle,
session.time, location, orientation, exif, jpeg, width, height, mimeType);
synchronized (mListenerRefs) {
for (TaskListener l : getListeners()) {
l.onTaskDone(session.outputUri.getPath(), session.outputUri);
}
}
CameraUtil.broadcastNewPicture(mContext, session.outputUri);
}
public void removePlaceholder(Session session) {
Storage.deleteImage(mContext.getContentResolver(), session.outputUri);
}
}
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