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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_OMNIBOX_AUTOCOMPLETE_PROVIDER_LISTENER_H_
#define COMPONENTS_OMNIBOX_AUTOCOMPLETE_PROVIDER_LISTENER_H_
class AutocompleteProviderListener {
public:
// Called by a provider as a notification that something has changed.
// |updated_matches| should be true iff the matches have changed in some
// way (they may not have changed if, for example, the provider did an
// asynchronous query to get more matches, came up with none, and is now
// giving up).
//
// NOTE: Providers MUST only call this method while processing asynchronous
// queries. Do not call this for a synchronous query.
//
// NOTE: There's no parameter to tell the listener _which_ provider is
// calling it. Because the AutocompleteController (the typical listener)
// doesn't cache the providers' individual matches locally, it has to get
// them all again when this is called anyway, so such a parameter wouldn't
// actually be useful.
virtual void OnProviderUpdate(bool updated_matches) = 0;
protected:
virtual ~AutocompleteProviderListener() {}
};
#endif // COMPONENTS_OMNIBOX_AUTOCOMPLETE_PROVIDER_LISTENER_H_
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