Allow different types of devtools client

chrome/browser/debugger/devtools_client_host.h

+// Copyright (c) 2009 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_DEBUGGER_DEVTOOLS_CLIENT_HOST_H_
+#define CHROME_BROWSER_DEBUGGER_DEVTOOLS_CLIENT_HOST_H_
+
+#include "base/basictypes.h"
+
+namespace IPC {
+class Message;
+}
+
+class DevToolsWindow;
+
+// Describes interface for managing devtools clients from browser process. There
+// are currently two types of clients: devtools windows and TCP socket
+// debuggers.
+class DevToolsClientHost {
+ public:
+  class CloseListener {
+   public:
+    CloseListener() {}
+    virtual ~CloseListener() {}
+    virtual void ClientHostClosing(DevToolsClientHost* host) = 0;
+   private:
+    DISALLOW_COPY_AND_ASSIGN(CloseListener);
+  };
+
+  virtual ~DevToolsClientHost() {}
+
+  // This method is called when tab inspected by this devtools client is
+  // closing.
+  virtual void InspectedTabClosing() = 0;
+
+  // Sends the message to the devtools client hosted by this object.
+  virtual void SendMessageToClient(const IPC::Message& msg) = 0;
+
+  void set_close_listener(CloseListener* listener) {
+    close_listener_ = listener;
+  }
+
+  virtual DevToolsWindow* AsDevToolsWindow() { return NULL; }
+
+ protected:
+  DevToolsClientHost() : close_listener_(NULL) {}
+
+  // Should be called when the devtools client is going to die and this
+  // DevToolsClientHost should not be used anymore.
+  void NotifyCloseListener() {
+    if (close_listener_) {
+      close_listener_->ClientHostClosing(this);
+      close_listener_ = NULL;
+    }
+  }
+
+ private:
+  CloseListener* close_listener_;
+  DISALLOW_COPY_AND_ASSIGN(DevToolsClientHost);
+};
+
+#endif  // CHROME_BROWSER_DEBUGGER_DEVTOOLS_CLIENT_HOST_H_