public:

///

/// Provides an opportunity to register custom preferences prior to

/// global and request context initialization.

///

/// If |type| is CEF_PREFERENCES_TYPE_GLOBAL the registered preferences can be

/// accessed via CefPreferenceManager::GetGlobalPreferences after

/// OnContextInitialized is called. Global preferences are registered a single

/// time at application startup. See related cef_settings_t.cache_path and

/// cef_settings_t.persist_user_preferences configuration.

///

/// If |type| is CEF_PREFERENCES_TYPE_REQUEST_CONTEXT the preferences can be

/// accessed via the CefRequestContext after

/// CefRequestContextHandler::OnRequestContextInitialized is called. Request

/// context preferences are registered each time a new CefRequestContext is

/// created. It is intended but not required that all request contexts have

/// the same registered preferences. See related

/// cef_request_context_settings_t.cache_path and

/// cef_request_context_settings_t.persist_user_preferences configuration.

///

/// Do not keep a reference to the |registrar| object. This method is called

/// on the browser process UI thread.

///

/*--cef()--*/

virtual void OnRegisterCustomPreferences(

cef_preferences_type_t type,

CefRawPtr<CefPreferenceRegistrar> registrar) {}

///

/// Called on the browser process UI thread immediately after the CEF context

/// has been initialized.

///

/*--cef()--*/

virtual void OnContextInitialized() {}

///

/// Called before a child process is launched. Will be called on the browser

/// process UI thread when launching a render process and on the browser

/// process IO thread when launching a GPU process. Provides an opportunity to

/// modify the child process command line. Do not keep a reference to

/// |command_line| outside of this method.

///

/*--cef()--*/

virtual void OnBeforeChildProcessLaunch(

CefRefPtr<CefCommandLine> command_line) {}

///

/// Implement this method to provide app-specific behavior when an already

/// running app is relaunched with the same CefSettings.root_cache_path value.

/// For example, activate an existing app window or create a new app window.

/// |command_line| will be read-only. Do not keep a reference to

/// |command_line| outside of this method. Return true if the relaunch is

/// handled or false for default relaunch behavior. Default behavior will

/// create a new default styled Chrome window.

///

/// To avoid cache corruption only a single app instance is allowed to run for

/// a given CefSettings.root_cache_path value. On relaunch the app checks a

/// process singleton lock and then forwards the new launch arguments to the

/// already running app process before exiting early. Client apps should

/// therefore check the CefInitialize() return value for early exit before

/// proceeding.

///

/// This method will be called on the browser process UI thread.

///

/*--cef(optional_param=current_directory)--*/

virtual bool OnAlreadyRunningAppRelaunch(

CefRefPtr<CefCommandLine> command_line,

const CefString& current_directory) {

return false;

}

///

/// Called from any thread when work has been scheduled for the browser

/// process main (UI) thread. This callback is used in combination with

/// cef_settings_t.external_message_pump and CefDoMessageLoopWork() in cases

/// where the CEF message loop must be integrated into an existing application

/// message loop (see additional comments and warnings on

/// CefDoMessageLoopWork). This callback should schedule a

/// CefDoMessageLoopWork() call to happen on the main (UI) thread. |delay_ms|

/// is the requested delay in milliseconds. If |delay_ms| is <= 0 then the

/// call should happen reasonably soon. If |delay_ms| is > 0 then the call

/// should be scheduled to happen after the specified delay and any currently

/// pending scheduled call should be cancelled.

///

/*--cef()--*/

virtual void OnScheduleMessagePumpWork(int64_t delay_ms) {}

///

/// Return the default client for use with a newly created browser window

/// (CefBrowser object). If null is returned the CefBrowser will be unmanaged

/// (no callbacks will be executed for that CefBrowser) and application

/// shutdown will be blocked until the browser window is closed manually. This

/// method is currently only used with the Chrome runtime when creating new

/// browser windows via Chrome UI.

///

/*--cef()--*/

virtual CefRefPtr<CefClient> GetDefaultClient() { return nullptr; }

///

/// Return the default handler for use with a new user or incognito profile

/// (CefRequestContext object). If null is returned the CefRequestContext will

/// be unmanaged (no callbacks will be executed for that CefRequestContext).

/// This method is currently only used with the Chrome runtime when creating

/// new browser windows via Chrome UI.

///

/*--cef()--*/

virtual CefRefPtr<CefRequestContextHandler>

GetDefaultRequestContextHandler() {

return nullptr;

}