content/renderer/web_ui_extension_data.h

// Copyright 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 CONTENT_RENDERER_WEB_UI_EXTENSION_DATA_H_
#define CONTENT_RENDERER_WEB_UI_EXTENSION_DATA_H_

#include <map>
#include <string>

#include "base/macros.h"
#include "content/public/renderer/render_frame_observer.h"
#include "content/public/renderer/render_frame_observer_tracker.h"

namespace content {

class WebUIExtensionData
    : public RenderFrameObserver,
      public RenderFrameObserverTracker<WebUIExtensionData> {
 public:
  explicit WebUIExtensionData(RenderFrame* render_frame);
  ~WebUIExtensionData() override;

  // Returns value for a given |key|. Will return an empty string if no such key
  // exists in the |variable_map_|.
  std::string GetValue(const std::string& key) const;

 private:
  // RenderFrameObserver implementation.
  bool OnMessageReceived(const IPC::Message& message) override;
  void OnDestruct() override;

  void OnSetWebUIProperty(const std::string& name, const std::string& value);

  std::map<std::string, std::string> variable_map_;

  DISALLOW_IMPLICIT_CONSTRUCTORS(WebUIExtensionData);
};

}  // namespace content

#endif  // CONTENT_RENDERER_WEB_UI_EXTENSION_DATA_H_