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      1 // Copyright 2013 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 CHROME_BROWSER_UI_WEBUI_COMPONENTS_UI_H_
      6 #define CHROME_BROWSER_UI_WEBUI_COMPONENTS_UI_H_
      7 
      8 #include "chrome/browser/component_updater/component_updater_service.h"
      9 #include "chrome/browser/component_updater/crx_update_item.h"
     10 #include "content/public/browser/web_ui_controller.h"
     11 #include "ui/base/layout.h"
     12 
     13 namespace base {
     14 class RefCountedMemory;
     15 }
     16 
     17 namespace user_prefs {
     18 class PrefRegistrySyncable;
     19 }
     20 
     21 class ComponentsUI : public content::WebUIController,
     22                      public component_updater::ServiceObserver {
     23  public:
     24   explicit ComponentsUI(content::WebUI* web_ui);
     25   virtual ~ComponentsUI();
     26 
     27   static void OnDemandUpdate(const std::string& component_id);
     28 
     29   static base::ListValue* LoadComponents();
     30 
     31   static base::RefCountedMemory* GetFaviconResourceBytes(
     32       ui::ScaleFactor scale_factor);
     33 
     34   // ServiceObserver implementation.
     35   virtual void OnEvent(Events event, const std::string& id) OVERRIDE;
     36 
     37  private:
     38   static base::string16 ComponentEventToString(Events event);
     39   static base::string16 ServiceStatusToString(
     40       component_updater::CrxUpdateItem::Status status);
     41   DISALLOW_COPY_AND_ASSIGN(ComponentsUI);
     42 };
     43 
     44 #endif  // CHROME_BROWSER_UI_WEBUI_COMPONENTS_UI_H_
     45