390 lines
13 KiB
Java
390 lines
13 KiB
Java
/*
|
|
* Copyright (C) 2008 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.server;
|
|
|
|
import static android.os.FileObserver.*;
|
|
import static android.os.ParcelFileDescriptor.*;
|
|
|
|
import android.app.IWallpaperService;
|
|
import android.app.IWallpaperServiceCallback;
|
|
import android.backup.BackupManager;
|
|
import android.content.Context;
|
|
import android.content.Intent;
|
|
import android.content.pm.PackageManager;
|
|
import android.content.pm.PackageManager.NameNotFoundException;
|
|
import android.content.res.Resources;
|
|
import android.os.Binder;
|
|
import android.os.RemoteException;
|
|
import android.os.FileObserver;
|
|
import android.os.ParcelFileDescriptor;
|
|
import android.os.RemoteCallbackList;
|
|
import android.util.Config;
|
|
import android.util.Log;
|
|
import android.util.Xml;
|
|
|
|
import java.io.IOException;
|
|
import java.io.InputStream;
|
|
import java.io.File;
|
|
import java.io.FileNotFoundException;
|
|
import java.io.FileInputStream;
|
|
import java.io.FileOutputStream;
|
|
|
|
import org.xmlpull.v1.XmlPullParser;
|
|
import org.xmlpull.v1.XmlPullParserException;
|
|
import org.xmlpull.v1.XmlSerializer;
|
|
|
|
import com.android.internal.util.FastXmlSerializer;
|
|
|
|
class WallpaperService extends IWallpaperService.Stub {
|
|
private static final String TAG = "WallpaperService";
|
|
|
|
private Object mLock = new Object();
|
|
|
|
private static final File WALLPAPER_DIR = new File(
|
|
"/data/data/com.android.settings/files");
|
|
private static final String WALLPAPER = "wallpaper";
|
|
private static final File WALLPAPER_FILE = new File(WALLPAPER_DIR, WALLPAPER);
|
|
|
|
/**
|
|
* List of callbacks registered they should each be notified
|
|
* when the wallpaper is changed.
|
|
*/
|
|
private final RemoteCallbackList<IWallpaperServiceCallback> mCallbacks
|
|
= new RemoteCallbackList<IWallpaperServiceCallback>();
|
|
|
|
/**
|
|
* Observes the wallpaper for changes and notifies all IWallpaperServiceCallbacks
|
|
* that the wallpaper has changed. The CREATE is triggered when there is no
|
|
* wallpaper set and is created for the first time. The CLOSE_WRITE is triggered
|
|
* everytime the wallpaper is changed.
|
|
*/
|
|
private final FileObserver mWallpaperObserver = new FileObserver(
|
|
WALLPAPER_DIR.getAbsolutePath(), CREATE | CLOSE_WRITE | DELETE | DELETE_SELF) {
|
|
@Override
|
|
public void onEvent(int event, String path) {
|
|
synchronized (mLock) {
|
|
if (path == null) {
|
|
return;
|
|
}
|
|
|
|
// changing the wallpaper means we'll need to back up the new one
|
|
long origId = Binder.clearCallingIdentity();
|
|
BackupManager bm = new BackupManager(mContext);
|
|
bm.dataChanged();
|
|
Binder.restoreCallingIdentity(origId);
|
|
|
|
File changedFile = new File(WALLPAPER_DIR, path);
|
|
if (WALLPAPER_FILE.equals(changedFile)) {
|
|
notifyCallbacksLocked();
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
private final Context mContext;
|
|
|
|
private int mWidth = -1;
|
|
private int mHeight = -1;
|
|
private String mName = "";
|
|
|
|
public WallpaperService(Context context) {
|
|
if (Config.LOGD) Log.d(TAG, "WallpaperService startup");
|
|
mContext = context;
|
|
if (!WALLPAPER_DIR.exists()) {
|
|
WALLPAPER_DIR.mkdirs();
|
|
}
|
|
mWallpaperObserver.startWatching();
|
|
loadSettingsLocked();
|
|
}
|
|
|
|
@Override
|
|
protected void finalize() throws Throwable {
|
|
super.finalize();
|
|
mWallpaperObserver.stopWatching();
|
|
}
|
|
|
|
public void clearWallpaper() {
|
|
synchronized (mLock) {
|
|
File f = WALLPAPER_FILE;
|
|
if (f.exists()) {
|
|
f.delete();
|
|
}
|
|
}
|
|
}
|
|
|
|
public void setDimensionHints(int width, int height) throws RemoteException {
|
|
checkPermission(android.Manifest.permission.SET_WALLPAPER_HINTS);
|
|
|
|
if (width <= 0 || height <= 0) {
|
|
throw new IllegalArgumentException("width and height must be > 0");
|
|
}
|
|
|
|
synchronized (mLock) {
|
|
if (width != mWidth || height != mHeight) {
|
|
mWidth = width;
|
|
mHeight = height;
|
|
saveSettingsLocked();
|
|
}
|
|
}
|
|
}
|
|
|
|
public int getWidthHint() throws RemoteException {
|
|
synchronized (mLock) {
|
|
return mWidth;
|
|
}
|
|
}
|
|
|
|
public int getHeightHint() throws RemoteException {
|
|
synchronized (mLock) {
|
|
return mHeight;
|
|
}
|
|
}
|
|
|
|
public ParcelFileDescriptor getWallpaper(IWallpaperServiceCallback cb) {
|
|
synchronized (mLock) {
|
|
try {
|
|
mCallbacks.register(cb);
|
|
File f = WALLPAPER_FILE;
|
|
if (!f.exists()) {
|
|
return null;
|
|
}
|
|
return ParcelFileDescriptor.open(f, MODE_READ_ONLY);
|
|
} catch (FileNotFoundException e) {
|
|
/* Shouldn't happen as we check to see if the file exists */
|
|
if (Config.LOGD) Log.d(TAG, "Error getting wallpaper", e);
|
|
}
|
|
return null;
|
|
}
|
|
}
|
|
|
|
public ParcelFileDescriptor setWallpaper(String name) {
|
|
checkPermission(android.Manifest.permission.SET_WALLPAPER);
|
|
synchronized (mLock) {
|
|
if (name == null) name = "";
|
|
mName = name;
|
|
saveSettingsLocked();
|
|
try {
|
|
ParcelFileDescriptor fd = ParcelFileDescriptor.open(WALLPAPER_FILE,
|
|
MODE_CREATE|MODE_READ_WRITE);
|
|
return fd;
|
|
} catch (FileNotFoundException e) {
|
|
if (Config.LOGD) Log.d(TAG, "Error setting wallpaper", e);
|
|
}
|
|
return null;
|
|
}
|
|
}
|
|
|
|
private void notifyCallbacksLocked() {
|
|
final int n = mCallbacks.beginBroadcast();
|
|
for (int i = 0; i < n; i++) {
|
|
try {
|
|
mCallbacks.getBroadcastItem(i).onWallpaperChanged();
|
|
} catch (RemoteException e) {
|
|
|
|
// The RemoteCallbackList will take care of removing
|
|
// the dead object for us.
|
|
}
|
|
}
|
|
mCallbacks.finishBroadcast();
|
|
final Intent intent = new Intent(Intent.ACTION_WALLPAPER_CHANGED);
|
|
mContext.sendBroadcast(intent);
|
|
}
|
|
|
|
private void checkPermission(String permission) {
|
|
if (PackageManager.PERMISSION_GRANTED!= mContext.checkCallingOrSelfPermission(permission)) {
|
|
throw new SecurityException("Access denied to process: " + Binder.getCallingPid()
|
|
+ ", must have permission " + permission);
|
|
}
|
|
}
|
|
|
|
private static JournaledFile makeJournaledFile() {
|
|
final String base = "/data/system/wallpaper_info.xml";
|
|
return new JournaledFile(new File(base), new File(base + ".tmp"));
|
|
}
|
|
|
|
private void saveSettingsLocked() {
|
|
JournaledFile journal = makeJournaledFile();
|
|
FileOutputStream stream = null;
|
|
try {
|
|
stream = new FileOutputStream(journal.chooseForWrite(), false);
|
|
XmlSerializer out = new FastXmlSerializer();
|
|
out.setOutput(stream, "utf-8");
|
|
out.startDocument(null, true);
|
|
|
|
out.startTag(null, "wp");
|
|
out.attribute(null, "width", Integer.toString(mWidth));
|
|
out.attribute(null, "height", Integer.toString(mHeight));
|
|
out.attribute(null, "name", mName);
|
|
out.endTag(null, "wp");
|
|
|
|
out.endDocument();
|
|
stream.close();
|
|
journal.commit();
|
|
} catch (IOException e) {
|
|
try {
|
|
if (stream != null) {
|
|
stream.close();
|
|
}
|
|
} catch (IOException ex) {
|
|
// Ignore
|
|
}
|
|
journal.rollback();
|
|
}
|
|
}
|
|
|
|
private void loadSettingsLocked() {
|
|
JournaledFile journal = makeJournaledFile();
|
|
FileInputStream stream = null;
|
|
File file = journal.chooseForRead();
|
|
boolean success = false;
|
|
try {
|
|
stream = new FileInputStream(file);
|
|
XmlPullParser parser = Xml.newPullParser();
|
|
parser.setInput(stream, null);
|
|
|
|
int type;
|
|
int providerIndex = 0;
|
|
do {
|
|
type = parser.next();
|
|
if (type == XmlPullParser.START_TAG) {
|
|
String tag = parser.getName();
|
|
if ("wp".equals(tag)) {
|
|
mWidth = Integer.parseInt(parser.getAttributeValue(null, "width"));
|
|
mHeight = Integer.parseInt(parser.getAttributeValue(null, "height"));
|
|
mName = parser.getAttributeValue(null, "name");
|
|
}
|
|
}
|
|
} while (type != XmlPullParser.END_DOCUMENT);
|
|
success = true;
|
|
} catch (NullPointerException e) {
|
|
Log.w(TAG, "failed parsing " + file, e);
|
|
} catch (NumberFormatException e) {
|
|
Log.w(TAG, "failed parsing " + file, e);
|
|
} catch (XmlPullParserException e) {
|
|
Log.w(TAG, "failed parsing " + file, e);
|
|
} catch (IOException e) {
|
|
Log.w(TAG, "failed parsing " + file, e);
|
|
} catch (IndexOutOfBoundsException e) {
|
|
Log.w(TAG, "failed parsing " + file, e);
|
|
}
|
|
try {
|
|
if (stream != null) {
|
|
stream.close();
|
|
}
|
|
} catch (IOException e) {
|
|
// Ignore
|
|
}
|
|
|
|
if (!success) {
|
|
mWidth = -1;
|
|
mHeight = -1;
|
|
mName = "";
|
|
}
|
|
}
|
|
|
|
void settingsRestored() {
|
|
boolean success = false;
|
|
synchronized (mLock) {
|
|
loadSettingsLocked();
|
|
// If there's a wallpaper name, we use that. If that can't be loaded, then we
|
|
// use the default.
|
|
if ("".equals(mName)) {
|
|
success = true;
|
|
} else {
|
|
success = restoreNamedResourceLocked();
|
|
}
|
|
}
|
|
|
|
if (!success) {
|
|
Log.e(TAG, "Failed to restore wallpaper: '" + mName + "'");
|
|
mName = "";
|
|
WALLPAPER_FILE.delete();
|
|
}
|
|
saveSettingsLocked();
|
|
}
|
|
|
|
boolean restoreNamedResourceLocked() {
|
|
if (mName.length() > 4 && "res:".equals(mName.substring(0, 4))) {
|
|
String resName = mName.substring(4);
|
|
|
|
String pkg = null;
|
|
int colon = resName.indexOf(':');
|
|
if (colon > 0) {
|
|
pkg = resName.substring(0, colon);
|
|
}
|
|
|
|
String ident = null;
|
|
int slash = resName.lastIndexOf('/');
|
|
if (slash > 0) {
|
|
ident = resName.substring(slash+1);
|
|
}
|
|
|
|
String type = null;
|
|
if (colon > 0 && slash > 0 && (slash-colon) > 1) {
|
|
type = resName.substring(colon+1, slash);
|
|
}
|
|
|
|
if (pkg != null && ident != null && type != null) {
|
|
int resId = -1;
|
|
InputStream res = null;
|
|
FileOutputStream fos = null;
|
|
try {
|
|
Context c = mContext.createPackageContext(pkg, Context.CONTEXT_RESTRICTED);
|
|
Resources r = c.getResources();
|
|
resId = r.getIdentifier(resName, null, null);
|
|
if (resId == 0) {
|
|
Log.e(TAG, "couldn't resolve identifier pkg=" + pkg + " type=" + type
|
|
+ " ident=" + ident);
|
|
return false;
|
|
}
|
|
|
|
res = r.openRawResource(resId);
|
|
fos = new FileOutputStream(WALLPAPER_FILE);
|
|
|
|
byte[] buffer = new byte[32768];
|
|
int amt;
|
|
while ((amt=res.read(buffer)) > 0) {
|
|
fos.write(buffer, 0, amt);
|
|
}
|
|
// mWallpaperObserver will notice the close and send the change broadcast
|
|
|
|
Log.d(TAG, "Restored wallpaper: " + resName);
|
|
return true;
|
|
} catch (NameNotFoundException e) {
|
|
Log.e(TAG, "Package name " + pkg + " not found");
|
|
} catch (Resources.NotFoundException e) {
|
|
Log.e(TAG, "Resource not found: " + resId);
|
|
} catch (IOException e) {
|
|
Log.e(TAG, "IOException while restoring wallpaper ", e);
|
|
} finally {
|
|
if (res != null) {
|
|
try {
|
|
res.close();
|
|
} catch (IOException ex) {}
|
|
}
|
|
if (fos != null) {
|
|
try {
|
|
fos.close();
|
|
} catch (IOException ex) {}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
}
|