chrome/browser/ui/webui/theme_source.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_THEME_SOURCE_H_
#define CHROME_BROWSER_UI_WEBUI_THEME_SOURCE_H_

#include <string>

#include "chrome/browser/ui/webui/chrome_url_data_manager.h"
#include "ui/base/layout.h"

class Profile;

namespace base {
class RefCountedMemory;
}

class ThemeSource : public ChromeURLDataManager::DataSource {
 public:
  explicit ThemeSource(Profile* profile);

  // Called when the network layer has requested a resource underneath
  // the path we registered.
  virtual void StartDataRequest(const std::string& path,
                                bool is_incognito,
                                int request_id) OVERRIDE;
  virtual std::string GetMimeType(const std::string& path) const OVERRIDE;

  // Used to tell ChromeURLDataManager which thread to handle the request on.
  virtual MessageLoop* MessageLoopForRequestPath(
      const std::string& path) const OVERRIDE;

  virtual bool ShouldReplaceExistingSource() const OVERRIDE;

 protected:
  virtual ~ThemeSource();

 private:
  // Fetch and send the theme bitmap.
  void SendThemeBitmap(int request_id,
                       int resource_id,
                       ui::ScaleFactor scale_factor);

  // The original profile (never an OTR profile).
  Profile* profile_;

  // We grab the CSS early so we don't have to go back to the UI thread later.
  scoped_refptr<base::RefCountedMemory> css_bytes_;

  DISALLOW_COPY_AND_ASSIGN(ThemeSource);
};

#endif  // CHROME_BROWSER_UI_WEBUI_THEME_SOURCE_H_