content/renderer/dom_automation_controller.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 CONTENT_RENDERER_DOM_AUTOMATION_CONTROLLER_H_
#define CONTENT_RENDERER_DOM_AUTOMATION_CONTROLLER_H_

#include <stdint.h>

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

namespace blink {
class WebLocalFrame;
}

namespace gin {
class Arguments;
}

namespace content {

class RenderFrame;

// Provides implementation of window.domAutomationController javascript object.
// Javascript can call domAutomationController.send(...) to send arbitrary data
// to the browser.  On the browser side, the data is received via one of the
// following:
// - Product code:
//   - Explicit handlers of FrameHostMsg_DomOperationResponse IPC
// - Test code:
//   - DOMMessageQueue class
//   - ExecuteScriptAndExtractInt/Bool/String functions
class DomAutomationController : public gin::Wrappable<DomAutomationController>,
                                public RenderFrameObserver {
 public:
  static gin::WrapperInfo kWrapperInfo;

  static void Install(RenderFrame* render_frame, blink::WebLocalFrame* frame);

  // Makes the renderer send a javascript value to the app.
  // The value to be sent can be either of type String,
  // Number (double casted to int32_t) or Boolean. Any other type or no
  // argument at all is ignored.
  bool SendMsg(const gin::Arguments& args);

 private:
  explicit DomAutomationController(RenderFrame* render_view);
  ~DomAutomationController() override;

  // gin::WrappableBase
  gin::ObjectTemplateBuilder GetObjectTemplateBuilder(
      v8::Isolate* isolate) override;

  // RenderFrameObserver
  void OnDestruct() override;
  void DidCreateScriptContext(v8::Local<v8::Context> context,
                              int world_id) override;

  DISALLOW_COPY_AND_ASSIGN(DomAutomationController);
};

}  // namespace content

#endif  // CONTENT_RENDERER_DOM_AUTOMATION_CONTROLLER_H_