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Bug 699786 - Add API and infra to support favicon load cancellation (r=blassey)

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This commit is contained in:
Lucas Rocha 2011-11-17 21:35:17 +00:00
parent 7630d6c2b4
commit d14280ccd9
1 changed files with 76 additions and 8 deletions
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84
embedding/android/Favicons.java
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@ -61,13 +61,21 @@ import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
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 DatabaseHelper mDbHelper;
private Map<Long,LoadFaviconTask> mLoadTasks;
private long mNextFaviconLoadId;
public interface OnFaviconLoadedListener {
public void onFaviconLoaded(String url, Drawable favicon);
}
@ -151,40 +159,73 @@ public class Favicons {
mContext = context;
mDbHelper = new DatabaseHelper(context);
mLoadTasks = new HashMap<Long,LoadFaviconTask>();
mNextFaviconLoadId = 0;
}
public void loadFavicon(String pageUrl, String faviconUrl,
public long loadFavicon(String pageUrl, String faviconUrl,
OnFaviconLoadedListener listener) {
Log.d(LOGTAG, "Calling loadFavicon() with URL = " + pageUrl +
" and favicon URL = " + faviconUrl);
// Handle the case where page url is empty
if (pageUrl == null || pageUrl.length() == 0) {
if (listener != null)
listener.onFaviconLoaded(null, null);
}
new LoadFaviconTask(pageUrl, faviconUrl, listener).execute();
LoadFaviconTask task = new LoadFaviconTask(pageUrl, faviconUrl, listener);
long taskId = task.getId();
mLoadTasks.put(taskId, task);
task.execute();
Log.d(LOGTAG, "Calling loadFavicon() with URL = " + pageUrl +
" and favicon URL = " + faviconUrl +
" (" + taskId + ")");
return taskId;
}
public boolean cancelFaviconLoad(long taskId) {
Log.d(LOGTAG, "Requesting cancelation of favicon load (" + taskId + ")");
if (!mLoadTasks.containsKey(taskId))
return false;
Log.d(LOGTAG, "Cancelling favicon load (" + taskId + ")");
LoadFaviconTask task = mLoadTasks.get(taskId);
return task.cancel(false);
}
public void close() {
Log.d(LOGTAG, "Closing Favicons database");
mDbHelper.close();
// Cancel any pending tasks
Set<Long> taskIds = mLoadTasks.keySet();
Iterator iter = taskIds.iterator();
while (iter.hasNext()) {
long taskId = (Long) iter.next();
cancelFaviconLoad(taskId);
}
}
private class LoadFaviconTask extends AsyncTask<Void, Void, BitmapDrawable> {
private long mId;
private String mPageUrl;
private String mFaviconUrl;
private OnFaviconLoadedListener mListener;
public LoadFaviconTask(String pageUrl, String faviconUrl, OnFaviconLoadedListener listener) {
mId = ++mNextFaviconLoadId;
mPageUrl = pageUrl;
mFaviconUrl = faviconUrl;
mListener = listener;
Log.d(LOGTAG, "Creating LoadFaviconTask with URL = " + pageUrl +
" and favicon URL = " + faviconUrl);
" and favicon URL = " + faviconUrl);
}
// Runs in background thread
@ -245,7 +286,7 @@ public class Favicons {
// Runs in background thread
private BitmapDrawable downloadFavicon(URL faviconUrl) {
Log.d(LOGTAG, "Downloading favicon for URL = " + mPageUrl +
" with favicon URL = " + mFaviconUrl);
" with favicon URL = " + mFaviconUrl);
// due to android bug 6066, we must download the entire image before using it
// http://code.google.com/p/android/issues/detail?id=6066
@ -295,6 +336,9 @@ public class Favicons {
BitmapDrawable image = null;
URL pageUrl = null;
if (isCancelled())
return null;
// Handle the case of malformed URL
try {
pageUrl = new URL(mPageUrl);
@ -321,10 +365,16 @@ public class Favicons {
Log.d(LOGTAG, "Favicon URL is now: " + mFaviconUrl);
if (isCancelled())
return null;
String storedFaviconUrl = mDbHelper.getFaviconUrlForPageUrl(mPageUrl);
if (storedFaviconUrl != null && storedFaviconUrl.equals(mFaviconUrl)) {
image = loadFaviconFromDb();
if (isCancelled())
return null;
// If favicon URL is defined but the favicon image is not
// stored in the database for some reason, we force download.
if (image == null) {
@ -339,7 +389,10 @@ public class Favicons {
@Override
protected void onPostExecute(final BitmapDrawable image) {
Log.d(LOGTAG, "LoadFaviconTask finished for URL = " + mPageUrl);
Log.d(LOGTAG, "LoadFaviconTask finished for URL = " + mPageUrl +
" (" + mId + ")");
mLoadTasks.remove(mId);
if (mListener != null) {
// We want to always run the listener on UI thread
@ -350,5 +403,20 @@ public class Favicons {
});
}
}
@Override
protected void onCancelled() {
Log.d(LOGTAG, "LoadFaviconTask cancelled for URL = " + mPageUrl +
" (" + mId + ")");
mLoadTasks.remove(mId);
// Note that we don't call the listener callback if the
// favicon load is cancelled.
}
public long getId() {
return mId;
}
}
}