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/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* vim: ts=4 sw=4 expandtab:
* 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
package org.mozilla.geckoview;
import android.util.Log;
import androidx.annotation.UiThread;
import org.mozilla.gecko.util.BundleEventListener;
import org.mozilla.gecko.util.EventCallback;
import org.mozilla.gecko.util.GeckoBundle;
/* package */ abstract class GeckoSessionHandler<Delegate> implements BundleEventListener {
private static final String LOGTAG = "GeckoSessionHandler";
private static final boolean DEBUG = false;
private final String mModuleName;
private final String[] mEvents;
private Delegate mDelegate;
private boolean mRegisteredListeners;
/* package */ GeckoSessionHandler(
final String module, final GeckoSession session, final String[] events) {
this(module, session, events, new String[] {});
}
/* package */ GeckoSessionHandler(
final String module,
final GeckoSession session,
final String[] events,
final String[] defaultEvents) {
session.handlersCount++;
mModuleName = module;
mEvents = events;
// Default events are always active
session.getEventDispatcher().registerUiThreadListener(this, defaultEvents);
}
public Delegate getDelegate() {
return mDelegate;
}
public void setDelegate(final Delegate delegate, final GeckoSession session) {
if (mDelegate == delegate) {
return;
}
mDelegate = delegate;
if (!mRegisteredListeners && delegate != null) {
session.getEventDispatcher().registerUiThreadListener(this, mEvents);
mRegisteredListeners = true;
}
// If session is not open, we will update module state during session opening.
if (!session.isOpen()) {
return;
}
final GeckoBundle msg = new GeckoBundle(2);
msg.putString("module", mModuleName);
msg.putBoolean("enabled", isEnabled());
session.getEventDispatcher().dispatch("GeckoView:UpdateModuleState", msg);
}
public String getName() {
return mModuleName;
}
public boolean isEnabled() {
return mDelegate != null;
}
@Override
@UiThread
public void handleMessage(
final String event, final GeckoBundle message, final EventCallback callback) {
if (DEBUG) {
Log.d(LOGTAG, mModuleName + " handleMessage: event = " + event);
}
if (mDelegate != null) {
handleMessage(mDelegate, event, message, callback);
} else {
handleDefaultMessage(event, message, callback);
}
}
protected abstract void handleMessage(
final Delegate delegate,
final String event,
final GeckoBundle message,
final EventCallback callback);
protected void handleDefaultMessage(
final String event, final GeckoBundle message, final EventCallback callback) {
if (callback != null) {
callback.sendError("No delegate registered");
}
}
}