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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.browser;
import android.app.ProgressDialog;
import android.app.WallpaperManager;
import android.content.Context;
import android.content.DialogInterface;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.util.Log;
import android.view.MenuItem;
import android.view.MenuItem.OnMenuItemClickListener;
import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
/**
* Handle setWallpaper requests
*
*/
public class WallpaperHandler extends Thread
implements OnMenuItemClickListener, DialogInterface.OnCancelListener {
private static final String LOGTAG = "WallpaperHandler";
// This should be large enough for BitmapFactory to decode the header so
// that we can mark and reset the input stream to avoid duplicate network i/o
private static final int BUFFER_SIZE = 128 * 1024;
private Context mContext;
private String mUrl;
private ProgressDialog mWallpaperProgress;
private boolean mCanceled = false;
public WallpaperHandler(Context context, String url) {
mContext = context;
mUrl = url;
}
@Override
public void onCancel(DialogInterface dialog) {
mCanceled = true;
}
@Override
public boolean onMenuItemClick(MenuItem item) {
if (mUrl != null && getState() == State.NEW) {
// The user may have tried to set a image with a large file size as
// their background so it may take a few moments to perform the
// operation.
// Display a progress spinner while it is working.
mWallpaperProgress = new ProgressDialog(mContext);
mWallpaperProgress.setIndeterminate(true);
mWallpaperProgress.setMessage(mContext.getResources()
.getText(R.string.progress_dialog_setting_wallpaper));
mWallpaperProgress.setCancelable(true);
mWallpaperProgress.setOnCancelListener(this);
mWallpaperProgress.show();
start();
}
return true;
}
@Override
public void run() {
WallpaperManager wm = WallpaperManager.getInstance(mContext);
Drawable oldWallpaper = wm.getDrawable();
InputStream inputstream = null;
try {
// TODO: This will cause the resource to be downloaded again, when
// we should in most cases be able to grab it from the cache. To fix
// this we should query WebCore to see if we can access a cached
// version and instead open an input stream on that. This pattern
// could also be used in the download manager where the same problem
// exists.
inputstream = openStream();
if (inputstream != null) {
if (!inputstream.markSupported()) {
inputstream = new BufferedInputStream(inputstream, BUFFER_SIZE);
}
inputstream.mark(BUFFER_SIZE);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
// We give decodeStream a wrapped input stream so it doesn't
// mess with our mark (currently it sets a mark of 1024)
BitmapFactory.decodeStream(
new BufferedInputStream(inputstream), null, options);
int maxWidth = wm.getDesiredMinimumWidth();
int maxHeight = wm.getDesiredMinimumHeight();
// Give maxWidth and maxHeight some leeway
maxWidth *= 1.25;
maxHeight *= 1.25;
int bmWidth = options.outWidth;
int bmHeight = options.outHeight;
int scale = 1;
while (bmWidth > maxWidth || bmHeight > maxHeight) {
scale <<= 1;
bmWidth >>= 1;
bmHeight >>= 1;
}
options.inJustDecodeBounds = false;
options.inSampleSize = scale;
try {
inputstream.reset();
} catch (IOException e) {
// BitmapFactory read more than we could buffer
// Re-open the stream
inputstream.close();
inputstream = openStream();
}
Bitmap scaledWallpaper = BitmapFactory.decodeStream(inputstream,
null, options);
if (scaledWallpaper != null) {
wm.setBitmap(scaledWallpaper);
} else {
Log.e(LOGTAG, "Unable to set new wallpaper, " +
"decodeStream returned null.");
}
}
} catch (IOException e) {
Log.e(LOGTAG, "Unable to set new wallpaper");
// Act as though the user canceled the operation so we try to
// restore the old wallpaper.
mCanceled = true;
} finally {
if (inputstream != null) {
try {
inputstream.close();
} catch (IOException e) {
// Ignore
}
}
}
if (mCanceled) {
// Restore the old wallpaper if the user cancelled whilst we were
// setting
// the new wallpaper.
int width = oldWallpaper.getIntrinsicWidth();
int height = oldWallpaper.getIntrinsicHeight();
Bitmap bm = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
Canvas canvas = new Canvas(bm);
oldWallpaper.setBounds(0, 0, width, height);
oldWallpaper.draw(canvas);
canvas.setBitmap(null);
try {
wm.setBitmap(bm);
} catch (IOException e) {
Log.e(LOGTAG, "Unable to restore old wallpaper.");
}
mCanceled = false;
}
if (mWallpaperProgress.isShowing()) {
mWallpaperProgress.dismiss();
}
}
/**
* Opens the input stream for the URL that the class should
* use to set the wallpaper. Abstracts the difference between
* standard URLs and data URLs.
* @return An open InputStream for the data at the URL
* @throws IOException if there is an error opening the URL stream
* @throws MalformedURLException if the URL is malformed
*/
private InputStream openStream() throws IOException, MalformedURLException {
InputStream inputStream = null;
if (DataUri.isDataUri(mUrl)) {
DataUri dataUri = new DataUri(mUrl);
inputStream = new ByteArrayInputStream(dataUri.getData());
} else {
URL url = new URL(mUrl);
inputStream = url.openStream();
}
return inputStream;
}
}
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