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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef COMPONENTS_AUTOCOMPLETE_AUTOCOMPLETE_PROVIDER_LISTENER_H_ | |
| 6 #define COMPONENTS_AUTOCOMPLETE_AUTOCOMPLETE_PROVIDER_LISTENER_H_ | |
| 7 | |
| 8 class AutocompleteProviderListener { | |
| 9 public: | |
| 10 // Called by a provider as a notification that something has changed. | |
| 11 // |updated_matches| should be true iff the matches have changed in some | |
| 12 // way (they may not have changed if, for example, the provider did an | |
| 13 // asynchronous query to get more matches, came up with none, and is now | |
| 14 // giving up). | |
| 15 // | |
| 16 // NOTE: Providers MUST only call this method while processing asynchronous | |
| 17 // queries. Do not call this for a synchronous query. | |
| 18 // | |
| 19 // NOTE: There's no parameter to tell the listener _which_ provider is | |
| 20 // calling it. Because the AutocompleteController (the typical listener) | |
| 21 // doesn't cache the providers' individual matches locally, it has to get | |
| 22 // them all again when this is called anyway, so such a parameter wouldn't | |
| 23 // actually be useful. | |
| 24 virtual void OnProviderUpdate(bool updated_matches) = 0; | |
| 25 | |
| 26 protected: | |
| 27 virtual ~AutocompleteProviderListener() {} | |
| 28 }; | |
| 29 | |
| 30 #endif // COMPONENTS_AUTOCOMPLETE_AUTOCOMPLETE_PROVIDER_LISTENER_H_ | |
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