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| 1 // Copyright 2016 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_NTP_TILES_WEBUI_NTP_TILES_INTERNALS_MESSAGE_HANDLER_CLIENT_H_ |
| 6 #define COMPONENTS_NTP_TILES_WEBUI_NTP_TILES_INTERNALS_MESSAGE_HANDLER_CLIENT_H_ |
| 7 |
| 8 #include <memory> |
| 9 #include <string> |
| 10 #include <vector> |
| 11 |
| 12 #include "base/callback_forward.h" |
| 13 #include "base/macros.h" |
| 14 #include "components/ntp_tiles/ntp_tile_source.h" |
| 15 |
| 16 class PrefService; |
| 17 |
| 18 namespace base { |
| 19 class Value; |
| 20 class ListValue; |
| 21 } // namespace base |
| 22 |
| 23 namespace ntp_tiles { |
| 24 |
| 25 class MostVisitedSites; |
| 26 class PopularSites; |
| 27 |
| 28 // Implemented by embedders to hook up NTPTilesInternalsMessageHandler. |
| 29 class NTPTilesInternalsMessageHandlerClient { |
| 30 public: |
| 31 // Returns the PrefService for the embedder and containing WebUI page. |
| 32 virtual PrefService* GetPrefs() = 0; |
| 33 |
| 34 // Returns true if the given source is enabled (even if, in practice, none of |
| 35 // the tiles would come from it). |
| 36 virtual bool DoesSourceExist(NTPTileSource source) = 0; |
| 37 |
| 38 // Creates a new MostVisitedSites based on the context pf the WebUI page. |
| 39 virtual std::unique_ptr<ntp_tiles::MostVisitedSites> |
| 40 MakeMostVisitedSites() = 0; |
| 41 |
| 42 // Creates a new PopularSites based on the context pf the WebUI page. |
| 43 virtual std::unique_ptr<ntp_tiles::PopularSites> MakePopularSites() = 0; |
| 44 |
| 45 // Registers a callback in Javascript. See content::WebUI and web::WebUIIOS. |
| 46 virtual void RegisterMessageCallback( |
| 47 const std::string& message, |
| 48 const base::Callback<void(const base::ListValue*)>& callback) = 0; |
| 49 |
| 50 // Invokes a function in Javascript. See content::WebUI and web::WebUIIOS. |
| 51 virtual void CallJavascriptFunctionVector( |
| 52 const std::string& name, |
| 53 const std::vector<const base::Value*>& values) = 0; |
| 54 |
| 55 // Convenience function for CallJavascriptFunctionVector(). |
| 56 template <typename... Arg> |
| 57 void CallJavascriptFunction(const std::string& name, const Arg&... arg) { |
| 58 CallJavascriptFunctionVector(name, {&arg...}); |
| 59 } |
| 60 |
| 61 protected: |
| 62 NTPTilesInternalsMessageHandlerClient(); |
| 63 virtual ~NTPTilesInternalsMessageHandlerClient(); |
| 64 |
| 65 private: |
| 66 DISALLOW_COPY_AND_ASSIGN(NTPTilesInternalsMessageHandlerClient); |
| 67 }; |
| 68 |
| 69 } // namespace ntp_tiles |
| 70 |
| 71 #endif // COMPONENTS_NTP_TILES_WEBUI_NTP_TILES_INTERNALS_MESSAGE_HANDLER_CLIENT
_H_ |
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