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

// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CHROME_BROWSER_UI_WEBUI_UBER_UBER_UI_H_
#define CHROME_BROWSER_UI_WEBUI_UBER_UBER_UI_H_

#include <string>

#include "base/memory/scoped_vector.h"
#include "base/values.h"
#include "chrome/browser/profiles/profile.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "content/public/browser/web_ui_controller.h"

// The WebUI class for the uber page (chrome://chrome). It manages the UI for
// the uber page (navigation bar and so forth) as well as WebUI objects for
// pages that appear in the uber page.
class UberUI : public content::WebUIController {
 public:
  explicit UberUI(content::WebUI* web_ui);
  virtual ~UberUI();

  // WebUIController implementation.
  virtual bool OverrideHandleWebUIMessage(const GURL& source_url,
                                          const std::string& message,
                                          const ListValue& args) OVERRIDE;

  // We forward these to |sub_uis_|.
  virtual void RenderViewCreated(
      content::RenderViewHost* render_view_host) OVERRIDE;
  virtual void RenderViewReused(
      content::RenderViewHost* render_view_host) OVERRIDE;

 private:
  // Clear a virtual URL from the pending navigation entry.
  void ClearPendingVirtualURL();

  // A map from URL origin to WebUI instance.
  typedef std::map<std::string, content::WebUI*> SubpageMap;

  // Creates and stores a WebUI for the given URL.
  void RegisterSubpage(const std::string& page_url);

  // The WebUI*s in this map are owned.
  SubpageMap sub_uis_;

  DISALLOW_COPY_AND_ASSIGN(UberUI);
};

class UberFrameUI : public content::NotificationObserver,
                    public content::WebUIController {
 public:
  explicit UberFrameUI(content::WebUI* web_ui);
  virtual ~UberFrameUI();

 private:
  // content::NotificationObserver implementation.
  virtual void Observe(int type,
                       const content::NotificationSource& source,
                       const content::NotificationDetails& details) OVERRIDE;

  content::NotificationRegistrar registrar_;

  DISALLOW_COPY_AND_ASSIGN(UberFrameUI);
};

#endif  // CHROME_BROWSER_UI_WEBUI_UBER_UBER_UI_H_