gecko/mobile/android/base/Favicons.java

331 lines
11 KiB
Java

/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko;
import org.mozilla.gecko.db.BrowserDB;
import org.mozilla.gecko.util.GeckoBackgroundThread;
import org.mozilla.gecko.util.GeckoJarReader;
import org.apache.http.HttpEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.entity.BufferedHttpEntity;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.sqlite.SQLiteQueryBuilder;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.net.http.AndroidHttpClient;
import android.os.AsyncTask;
import android.support.v4.util.LruCache;
import android.util.Log;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
public class Favicons {
private static final String LOGTAG = "GeckoFavicons";
public static final long NOT_LOADING = 0;
private Context mContext;
private Map<Long,LoadFaviconTask> mLoadTasks;
private long mNextFaviconLoadId;
private LruCache<String, Bitmap> mFaviconsCache;
private static final String USER_AGENT = GeckoApp.mAppContext.getDefaultUAString();
private AndroidHttpClient mHttpClient;
public interface OnFaviconLoadedListener {
public void onFaviconLoaded(String url, Bitmap favicon);
}
public Favicons() {
Log.d(LOGTAG, "Creating Favicons instance");
mLoadTasks = Collections.synchronizedMap(new HashMap<Long,LoadFaviconTask>());
mNextFaviconLoadId = 0;
// Create a favicon memory cache that have up to 1mb of size
mFaviconsCache = new LruCache<String, Bitmap>(1024 * 1024) {
@Override
protected int sizeOf(String url, Bitmap image) {
return image.getRowBytes() * image.getHeight();
}
};
}
private synchronized AndroidHttpClient getHttpClient() {
if (mHttpClient != null)
return mHttpClient;
mHttpClient = AndroidHttpClient.newInstance(USER_AGENT);
return mHttpClient;
}
private void dispatchResult(final String pageUrl, final Bitmap image,
final OnFaviconLoadedListener listener) {
if (pageUrl != null && image != null)
putFaviconInMemCache(pageUrl, image);
// We want to always run the listener on UI thread
GeckoAppShell.getMainHandler().post(new Runnable() {
public void run() {
if (listener != null)
listener.onFaviconLoaded(pageUrl, image);
}
});
}
public String getFaviconUrlForPageUrl(String pageUrl) {
return BrowserDB.getFaviconUrlForHistoryUrl(mContext.getContentResolver(), pageUrl);
}
public long loadFavicon(String pageUrl, String faviconUrl, boolean persist,
OnFaviconLoadedListener listener) {
// Handle the case where page url is empty
if (pageUrl == null || pageUrl.length() == 0) {
dispatchResult(null, null, listener);
return -1;
}
// Check if favicon is mem cached
Bitmap image = getFaviconFromMemCache(pageUrl);
if (image != null) {
dispatchResult(pageUrl, image, listener);
return -1;
}
LoadFaviconTask task = new LoadFaviconTask(pageUrl, faviconUrl, persist, listener);
long taskId = task.getId();
mLoadTasks.put(taskId, task);
task.execute();
return taskId;
}
public Bitmap getFaviconFromMemCache(String pageUrl) {
return mFaviconsCache.get(pageUrl);
}
public void putFaviconInMemCache(String pageUrl, Bitmap image) {
mFaviconsCache.put(pageUrl, image);
}
public void clearMemCache() {
mFaviconsCache.evictAll();
}
public boolean cancelFaviconLoad(long taskId) {
Log.d(LOGTAG, "Requesting cancelation of favicon load (" + taskId + ")");
boolean cancelled = false;
synchronized (mLoadTasks) {
if (!mLoadTasks.containsKey(taskId))
return false;
Log.d(LOGTAG, "Cancelling favicon load (" + taskId + ")");
LoadFaviconTask task = mLoadTasks.get(taskId);
cancelled = task.cancel(false);
}
return cancelled;
}
public void close() {
Log.d(LOGTAG, "Closing Favicons database");
// Cancel any pending tasks
synchronized (mLoadTasks) {
Set<Long> taskIds = mLoadTasks.keySet();
Iterator<Long> iter = taskIds.iterator();
while (iter.hasNext()) {
long taskId = iter.next();
cancelFaviconLoad(taskId);
}
}
if (mHttpClient != null)
mHttpClient.close();
}
private static class FaviconsInstanceHolder {
private static final Favicons INSTANCE = new Favicons();
}
public static Favicons getInstance() {
return Favicons.FaviconsInstanceHolder.INSTANCE;
}
public void attachToContext(Context context) {
mContext = context;
}
private class LoadFaviconTask extends AsyncTask<Void, Void, Bitmap> {
private long mId;
private String mPageUrl;
private String mFaviconUrl;
private OnFaviconLoadedListener mListener;
private boolean mPersist;
public LoadFaviconTask(String pageUrl, String faviconUrl, boolean persist,
OnFaviconLoadedListener listener) {
synchronized(this) {
mId = ++mNextFaviconLoadId;
}
mPageUrl = pageUrl;
mFaviconUrl = faviconUrl;
mListener = listener;
mPersist = persist;
}
// Runs in background thread
private Bitmap loadFaviconFromDb() {
ContentResolver resolver = mContext.getContentResolver();
return BrowserDB.getFaviconForUrl(resolver, mPageUrl);
}
// Runs in background thread
private void saveFaviconToDb(final Bitmap favicon) {
if (!mPersist) {
return;
}
// Even though this code is in a background thread, all DB writes
// should happen in GeckoBackgroundThread or we could get locked
// databases.
GeckoBackgroundThread.post(new Runnable() {
public void run() {
ContentResolver resolver = mContext.getContentResolver();
BrowserDB.updateFaviconForUrl(resolver, mPageUrl, favicon, mFaviconUrl);
}
});
}
// Runs in background thread
private Bitmap downloadFavicon(URL faviconUrl) {
if (mFaviconUrl.startsWith("jar:jar:")) {
BitmapDrawable d = GeckoJarReader.getBitmapDrawable(mContext.getResources(), mFaviconUrl);
return d.getBitmap();
}
URI uri;
try {
uri = faviconUrl.toURI();
} catch (URISyntaxException e) {
Log.d(LOGTAG, "Could not get URI for favicon");
return null;
}
// only get favicons for HTTP/HTTPS
String scheme = uri.getScheme();
if (!"http".equals(scheme) && !"https".equals(scheme))
return null;
// skia decoder sometimes returns null; workaround is to use BufferedHttpEntity
// http://groups.google.com/group/android-developers/browse_thread/thread/171b8bf35dbbed96/c3ec5f45436ceec8?lnk=raot
Bitmap image = null;
try {
HttpGet request = new HttpGet(faviconUrl.toURI());
HttpEntity entity = getHttpClient().execute(request).getEntity();
BufferedHttpEntity bufferedEntity = new BufferedHttpEntity(entity);
InputStream contentStream = bufferedEntity.getContent();
image = BitmapFactory.decodeStream(contentStream);
} catch (Exception e) {
Log.e(LOGTAG, "Error reading favicon", e);
}
return image;
}
@Override
protected Bitmap doInBackground(Void... unused) {
Bitmap image = null;
if (isCancelled())
return null;
URL faviconUrl = null;
// Handle the case of malformed favicon URL
try {
// If favicon is empty, fallback to default favicon URI
if (mFaviconUrl == null || mFaviconUrl.length() == 0) {
// Handle the case of malformed URL
URL pageUrl = null;
pageUrl = new URL(mPageUrl);
faviconUrl = new URL(pageUrl.getProtocol(), pageUrl.getAuthority(), "/favicon.ico");
mFaviconUrl = faviconUrl.toString();
} else {
faviconUrl = new URL(mFaviconUrl);
}
} catch (MalformedURLException e) {
Log.d(LOGTAG, "The provided favicon URL is not valid");
return null;
}
if (isCancelled())
return null;
String storedFaviconUrl = getFaviconUrlForPageUrl(mPageUrl);
if (storedFaviconUrl != null && storedFaviconUrl.equals(mFaviconUrl)) {
image = loadFaviconFromDb();
if (image != null)
return image;
}
if (isCancelled())
return null;
image = downloadFavicon(faviconUrl);
if (image != null && image.getWidth() > 0 && image.getHeight() > 0) {
saveFaviconToDb(image);
} else {
image = null;
}
return image;
}
@Override
protected void onPostExecute(final Bitmap image) {
mLoadTasks.remove(mId);
dispatchResult(mPageUrl, image, mListener);
}
@Override
protected void onCancelled() {
mLoadTasks.remove(mId);
// Note that we don't call the listener callback if the
// favicon load is cancelled.
}
public long getId() {
return mId;
}
}
}