gecko/mobile/android/base/TabsAccessor.java

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/* 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.BrowserContract;
import org.mozilla.gecko.util.GeckoAsyncTask;
import org.json.JSONArray;
import org.json.JSONException;
import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.os.SystemClock;
import android.util.Log;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
public final class TabsAccessor {
private static final String LOGTAG = "GeckoTabsAccessor";
private static final String[] CLIENTS_AVAILABILITY_PROJECTION = new String[] {
BrowserContract.Clients.GUID
};
private static final String[] TABS_PROJECTION_COLUMNS = new String[] {
BrowserContract.Tabs.TITLE,
BrowserContract.Tabs.URL,
BrowserContract.Clients.GUID,
BrowserContract.Clients.NAME
};
// Projection column numbers
public static enum TABS_COLUMN {
TITLE,
URL,
GUID,
NAME
};
private static final String CLIENTS_SELECTION = BrowserContract.Clients.GUID + " IS NOT NULL";
private static final String TABS_SELECTION = BrowserContract.Tabs.CLIENT_GUID + " IS NOT NULL";
private static final String LOCAL_CLIENT_SELECTION = BrowserContract.Clients.GUID + " IS NULL";
private static final String LOCAL_TABS_SELECTION = BrowserContract.Tabs.CLIENT_GUID + " IS NULL";
public static class RemoteTab {
public String title;
public String url;
public String guid;
public String name;
}
public interface OnQueryTabsCompleteListener {
public void onQueryTabsComplete(List<RemoteTab> tabs);
}
public interface OnClientsAvailableListener {
public void areAvailable(boolean available);
}
// Helper method to check if there are any clients available
public static void areClientsAvailable(final Context context, final OnClientsAvailableListener listener) {
if (listener == null)
return;
(new GeckoAsyncTask<Void, Void, Boolean>(GeckoApp.mAppContext, GeckoAppShell.getHandler()) {
@Override
protected Boolean doInBackground(Void... unused) {
Uri uri = BrowserContract.Tabs.CONTENT_URI;
uri = uri.buildUpon()
.appendQueryParameter(BrowserContract.PARAM_LIMIT, "1")
.build();
Cursor cursor = context.getContentResolver().query(uri,
CLIENTS_AVAILABILITY_PROJECTION,
CLIENTS_SELECTION,
null,
null);
if (cursor == null)
return false;
try {
return cursor.moveToNext();
} finally {
cursor.close();
}
}
@Override
protected void onPostExecute(Boolean availability) {
listener.areAvailable(availability);
}
}).setPriority(GeckoAsyncTask.Priority.HIGH).execute();
}
// This method returns all tabs from all remote clients,
// ordered by most recent client first, most recent tab first
public static void getTabs(final Context context, final OnQueryTabsCompleteListener listener) {
getTabs(context, 0, listener);
}
// This method returns limited number of tabs from all remote clients,
// ordered by most recent client first, most recent tab first
public static void getTabs(final Context context, final int limit, final OnQueryTabsCompleteListener listener) {
// If there is no listener, no point in doing work.
if (listener == null)
return;
(new GeckoAsyncTask<Void, Void, List<RemoteTab>>(GeckoApp.mAppContext, GeckoAppShell.getHandler()) {
@Override
protected List<RemoteTab> doInBackground(Void... unused) {
Uri uri = BrowserContract.Tabs.CONTENT_URI;
if (limit > 0) {
uri = uri.buildUpon()
.appendQueryParameter(BrowserContract.PARAM_LIMIT, String.valueOf(limit))
.build();
}
Cursor cursor = context.getContentResolver().query(uri,
TABS_PROJECTION_COLUMNS,
TABS_SELECTION,
null,
null);
if (cursor == null)
return null;
RemoteTab tab;
final ArrayList<RemoteTab> tabs = new ArrayList<RemoteTab> ();
try {
while (cursor.moveToNext()) {
tab = new RemoteTab();
tab.title = cursor.getString(TABS_COLUMN.TITLE.ordinal());
tab.url = cursor.getString(TABS_COLUMN.URL.ordinal());
tab.guid = cursor.getString(TABS_COLUMN.GUID.ordinal());
tab.name = cursor.getString(TABS_COLUMN.NAME.ordinal());
tabs.add(tab);
}
} finally {
cursor.close();
}
return Collections.unmodifiableList(tabs);
}
@Override
protected void onPostExecute(List<RemoteTab> tabs) {
listener.onQueryTabsComplete(tabs);
}
}).execute();
}
// Updates the modified time of the local client with the current time.
private static void updateLocalClient(final ContentResolver cr) {
ContentValues values = new ContentValues();
values.put(BrowserContract.Clients.LAST_MODIFIED, System.currentTimeMillis());
cr.update(BrowserContract.Clients.CONTENT_URI, values, LOCAL_CLIENT_SELECTION, null);
}
// Deletes all local tabs.
private static void deleteLocalTabs(final ContentResolver cr) {
cr.delete(BrowserContract.Tabs.CONTENT_URI, LOCAL_TABS_SELECTION, null);
}
/**
* Tabs are positioned in the DB in the same order that they appear in the tabs param.
* - URL should never empty or null. Skip this tab if there's no URL.
* - TITLE should always a string, either a page title or empty.
* - LAST_USED should always be numeric.
* - FAVICON should be a URL or null.
* - HISTORY should be serialized JSON array of URLs.
* - POSITION should always be numeric.
* - CLIENT_GUID should always be null to represent the local client.
*/
private static void insertLocalTabs(final ContentResolver cr, final Iterable<Tab> tabs) {
// Reuse this for serializing individual history URLs as JSON.
JSONArray history = new JSONArray();
ArrayList<ContentValues> valuesToInsert = new ArrayList<ContentValues>();
int position = 0;
for (Tab tab : tabs) {
// Skip this tab if it has a null URL.
String url = tab.getURL();
if (url == null)
continue;
ContentValues values = new ContentValues();
values.put(BrowserContract.Tabs.URL, url);
values.put(BrowserContract.Tabs.TITLE, tab.getTitle());
values.put(BrowserContract.Tabs.LAST_USED, tab.getLastUsed());
String favicon = tab.getFaviconURL();
if (favicon != null)
values.put(BrowserContract.Tabs.FAVICON, favicon);
else
values.putNull(BrowserContract.Tabs.FAVICON);
// We don't have access to session history in Java, so for now, we'll
// just use a JSONArray that holds most recent history item.
try {
history.put(0, tab.getURL());
values.put(BrowserContract.Tabs.HISTORY, history.toString());
} catch (JSONException e) {
Log.e(LOGTAG, "JSONException adding URL to tab history array", e);
}
values.put(BrowserContract.Tabs.POSITION, position++);
// A null client guid corresponds to the local client.
values.putNull(BrowserContract.Tabs.CLIENT_GUID);
valuesToInsert.add(values);
}
ContentValues[] valuesToInsertArray = valuesToInsert.toArray(new ContentValues[valuesToInsert.size()]);
cr.bulkInsert(BrowserContract.Tabs.CONTENT_URI, valuesToInsertArray);
}
// Deletes all local tabs and replaces them with a new list of tabs.
public static synchronized void persistLocalTabs(final ContentResolver cr, final Iterable<Tab> tabs) {
Log.v(LOGTAG, "zerdatime " + SystemClock.uptimeMillis() + " - start of persistLocalTabs");
deleteLocalTabs(cr);
insertLocalTabs(cr, tabs);
updateLocalClient(cr);
Log.v(LOGTAG, "zerdatime " + SystemClock.uptimeMillis() + " - end of persistLocalTabs");
}
}