chrome/browser/ui/webui/uber/uber_ui.h

   1 // Copyright (c) 2012 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_UBER_UBER_UI_H_
   6 #define CHROME_BROWSER_UI_WEBUI_UBER_UBER_UI_H_
   7
   8 #include <string>
   9
  10 #include "base/scoped_observer.h"
  11 #include "base/values.h"
  12 #include "content/public/browser/web_ui_controller.h"
  13 #include "extensions/browser/extension_registry_observer.h"
  14
  15 namespace content {
  16 class BrowserContext;
  17 }
  18
  19 namespace extensions {
  20 class ExtensionRegistry;
  21 }
  22
  23 // The WebUI class for the uber page (chrome://chrome). It manages the UI for
  24 // the uber page (navigation bar and so forth) as well as WebUI objects for
  25 // pages that appear in the uber page.
  26 class UberUI : public content::WebUIController {
  27  public:
  28   explicit UberUI(content::WebUI* web_ui);
  29   ~UberUI() override;
  30
  31   content::WebUI* GetSubpage(const std::string& page_url);
  32
  33   // WebUIController implementation.
  34   bool OverrideHandleWebUIMessage(const GURL& source_url,
  35                                   const std::string& message,
  36                                   const base::ListValue& args) override;
  37
  38   // We forward these to |sub_uis_|.
  39   void RenderViewCreated(content::RenderViewHost* render_view_host) override;
  40   void RenderViewReused(content::RenderViewHost* render_view_host) override;
  41
  42  private:
  43   // A map from URL origin to WebUI instance.
  44   typedef std::map<std::string, content::WebUI*> SubpageMap;
  45
  46   // Creates and stores a WebUI for the given URL.
  47   void RegisterSubpage(const std::string& page_url,
  48                        const std::string& page_host);
  49
  50   // The WebUI*s in this map are owned.
  51   SubpageMap sub_uis_;
  52
  53   DISALLOW_COPY_AND_ASSIGN(UberUI);
  54 };
  55
  56 class UberFrameUI : public content::WebUIController,
  57                     public extensions::ExtensionRegistryObserver {
  58  public:
  59   explicit UberFrameUI(content::WebUI* web_ui);
  60   ~UberFrameUI() override;
  61
  62  private:
  63   // extensions::ExtensionRegistryObserver implementation.
  64   void OnExtensionLoaded(content::BrowserContext* browser_context,
  65                          const extensions::Extension* extension) override;
  66   void OnExtensionUnloaded(
  67       content::BrowserContext* browser_context,
  68       const extensions::Extension* extension,
  69       extensions::UnloadedExtensionInfo::Reason reason) override;
  70
  71   ScopedObserver<extensions::ExtensionRegistry,
  72                  extensions::ExtensionRegistryObserver>
  73       extension_registry_observer_;
  74
  75   DISALLOW_COPY_AND_ASSIGN(UberFrameUI);
  76 };
  77
  78 #endif  // CHROME_BROWSER_UI_WEBUI_UBER_UBER_UI_H_