关于cef:cef-概述

/*--cef(source=client,no_debugct_check)--*/
class CefApp : public virtual CefBase {
 public:
  ///
  // Provides an opportunity to view and/or modify command-line arguments before
  // processing by CEF and Chromium. The |process_type| value will be empty for
  // the browser process. Do not keep a reference to the CefCommandLine object
  // passed to this method. The CefSettings.command_line_args_disabled value
  // can be used to start with an empty command-line object. Any values
  // specified in CefSettings that equate to command-line arguments will be set
  // before this method is called. Be cautious when using this method to modify
  // command-line arguments for non-browser processes as this may result in
  // undefined behavior including crashes.
  ///
  /*--cef(optional_param=process_type)--*/
  virtual void OnBeforeCommandLineProcessing(
      const CefString& process_type,
      CefRefPtr<CefCommandLine> command_line) { }

  ///
  // Provides an opportunity to register custom schemes. Do not keep a reference
  // to the |registrar| object. This method is called on the main thread for
  // each process and the registered schemes should be the same across all
  // processes.
  ///
  /*--cef()--*/
  virtual void OnRegisterCustomSchemes(CefRefPtr<CefSchemeRegistrar> registrar) { }

  ///
  // Return the handler for resource bundle events. If
  // CefSettings.pack_loading_disabled is true a handler must be returned. If no
  // handler is returned resources will be loaded from pack files. This method
  // is called by the browser and render processes on multiple threads.
  ///
  /*--cef()--*/
  virtual CefRefPtr<CefResourceBundleHandler> GetResourceBundleHandler() {return NULL;}

  ///
  // Return the handler for functionality specific to the browser process. This
  // method is called on multiple threads in the browser process.
  ///
  /*--cef()--*/
  virtual CefRefPtr<CefBrowserProcessHandler> GetBrowserProcessHandler() {return NULL;}

  ///
  // Return the handler for functionality specific to the render process. This
  // method is called on the render process main thread.
  ///
  /*--cef()--*/
  virtual CefRefPtr<CefRenderProcessHandler> GetRenderProcessHandler() {return NULL;}
};

接口阐明：

 // 提供批改命令行参数的机会
  virtual void OnBeforeCommandLineProcessing(
      const CefString& process_type,
      CefRefPtr<CefCommandLine> command_line) {}
 // 提供批改注册用户主题的机会
  virtual void OnRegisterCustomSchemes(CefRawPtr<CefSchemeRegistrar> registrar) {}
// 资源包 Handler
  virtual CefRefPtr<CefResourceBundleHandler> GetResourceBundleHandler() {return nullptr;}
// 浏览器过程 Handler
  virtual CefRefPtr<CefBrowserProcessHandler> GetBrowserProcessHandler() {return nullptr;}
// 渲染过程 Handler
  virtual CefRefPtr<CefRenderProcessHandler> GetRenderProcessHandler() {return nullptr;}

CefApp，此接口用来传递到 CefInitialize()，和容许应用程序定制全局，如资源加载，代理。一些性能是由所有过程共享的，有些必须实现浏览器的过程中，必须在渲染过程中执行。

CEFApp