@Override
public void onBackPressed() {
final Tabs tabs = Tabs.getInstance();
final Tab tab = tabs.getSelectedTab();
// Give Gecko a chance to handle the back press first, then fallback to the Java UI.
GeckoAppShell.sendRequestToGecko(
new GeckoRequest("Browser:OnBackPressed", null) {
@Override
public void onResponse(NativeJSObject nativeJSObject) {
if (!nativeJSObject.getBoolean("handled")) {
// Default behavior is Gecko didn't prevent.
onDefault();
}
}
@Override
public void onError(NativeJSObject error) {
// Default behavior is Gecko didn't prevent, via failure.
onDefault();
}
// Return from Gecko thread, then back-press through the Java UI.
private void onDefault() {
ThreadUtils.postToUiThread(
new Runnable() {
@Override
public void run() {
if (tab.doBack()) {
return;
}
finish();
}
});
}
});
}
@Override
public void sendRequestToGecko(
final String event,
final JSONObject message,
final JavaAddonInterfaceV1.RequestCallback callback) {
final String prefixedEvent = guid + ":" + event;
GeckoAppShell.sendRequestToGecko(
new GeckoRequest(prefixedEvent, message) {
@Override
public void onResponse(NativeJSObject nativeJSObject) {
if (callback == null) {
// Nothing to do.
return;
}
try {
final JSONObject json = new JSONObject(nativeJSObject.toString());
callback.onResponse(GeckoAppShell.getContext(), json);
} catch (JSONException e) {
// No way to report failure.
Log.e(LOGTAG, "Exception handling response to request [" + event + "]:", e);
}
}
});
}