cef/libcef/context.h

// Copyright (c) 2008 The Chromium Embedded Framework Authors.
// Portions copyright (c) 2006-2008 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 _CONTEXT_H
#define _CONTEXT_H

#include "../include/cef.h"
#include "base/message_loop.h"
#include "base/gfx/native_widget_types.h"
#include "webkit/glue/webpreferences.h"

class CefBrowserImpl;

class CefContext : public CefThreadSafeBase<CefBase>
{
public:
  typedef std::list<CefRefPtr<CefBrowserImpl> > BrowserList;

  CefContext();
  ~CefContext();

  bool Initialize();
  void Shutdown();

  MessageLoopForUI* GetMessageLoopForUI() { return messageloopui_; }

  HMODULE GetInstanceHandle() { return hinstance_; }
  HANDLE GetUIThreadHandle() { return hthreadui_; }
  DWORD GetUIThreadId() { return idthreadui_; }
  WebPreferences* GetWebPreferences() { return webprefs_; }

  bool AddBrowser(CefRefPtr<CefBrowserImpl> browser);
  bool RemoveBrowser(CefRefPtr<CefBrowserImpl> browser);
  BrowserList* GetBrowserList() { return &browserlist_; }

  // Returns true if the calling thread is the same as the UI thread
  bool RunningOnUIThread() { return (GetCurrentThreadId() == idthreadui_); }

  ////////////////////////////////////////////////////////////
  // ALL UIT_* METHODS MUST ONLY BE CALLED ON THE UI THREAD //
  ////////////////////////////////////////////////////////////

  void UIT_RegisterPlugin(struct CefPluginInfo* plugin_info);
  void UIT_UnregisterPlugin(struct CefPluginInfo* plugin_info);

private:
  void SetMessageLoopForUI(MessageLoopForUI* loop);
  void NotifyEvent();
  
protected:
  HMODULE hinstance_;
  DWORD idthreadui_;
  HANDLE hthreadui_;
  HANDLE heventui_;
  MessageLoopForUI* messageloopui_;
  bool in_transition_;
  BrowserList browserlist_;
  WebPreferences* webprefs_;

  friend DWORD WINAPI ThreadHandlerUI(LPVOID lpParam);
};

// Post a task to the UI message loop
void PostTask(const tracked_objects::Location& from_here, Task* task);

// Global context object pointer
extern CefRefPtr<CefContext> _Context;

// Macro for requiring that a function be called on the UI thread
#define REQUIRE_UIT()   DCHECK(_Context->RunningOnUIThread())

#endif // _CONTEXT_H