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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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