| // 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_BROWSER_AUTOCOMPLETE_PROVIDER_LISTENER_H_ |
| #define COMPONENTS_OMNIBOX_BROWSER_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_BROWSER_AUTOCOMPLETE_PROVIDER_LISTENER_H_ |
