public:

typedef cef_errorcode_t ErrorCode;

typedef cef_transition_type_t TransitionType;

///

// Called when the loading state has changed. This callback will be executed

// twice -- once when loading is initiated either programmatically or by user

// action, and once when loading is terminated due to completion, cancellation

// of failure. It will be called before any calls to OnLoadStart and after all

// calls to OnLoadError and/or OnLoadEnd.

///

/*--cef()--*/

virtual void OnLoadingStateChange(CefRefPtr<CefBrowser> browser,

bool isLoading,

bool canGoBack,

bool canGoForward) {}

///

// Called after a navigation has been committed and before the browser begins

// loading contents in the frame. The |frame| value will never be empty --

// call the IsMain() method to check if this frame is the main frame.

// |transition_type| provides information about the source of the navigation

// and an accurate value is only available in the browser process. Multiple

// frames may be loading at the same time. Sub-frames may start or continue

// loading after the main frame load has ended. This method will not be called

// for same page navigations (fragments, history state, etc.) or for

// navigations that fail or are canceled before commit. For notification of

// overall browser load status use OnLoadingStateChange instead.

///

/*--cef()--*/

virtual void OnLoadStart(CefRefPtr<CefBrowser> browser,

CefRefPtr<CefFrame> frame,

TransitionType transition_type) {}

///

// Called when the browser is done loading a frame. The |frame| value will

// never be empty -- call the IsMain() method to check if this frame is the

// main frame. Multiple frames may be loading at the same time. Sub-frames may

// start or continue loading after the main frame load has ended. This method

// will not be called for same page navigations (fragments, history state,

// etc.) or for navigations that fail or are canceled before commit. For

// notification of overall browser load status use OnLoadingStateChange

// instead.

///

/*--cef()--*/

virtual void OnLoadEnd(CefRefPtr<CefBrowser> browser,

CefRefPtr<CefFrame> frame,

int httpStatusCode) {}

///

// Called when a navigation fails or is canceled. This method may be called

// by itself if before commit or in combination with OnLoadStart/OnLoadEnd if

// after commit. |errorCode| is the error code number, |errorText| is the

// error text and |failedUrl| is the URL that failed to load.

// See net\base\net_error_list.h for complete descriptions of the error codes.

///

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

virtual void OnLoadError(CefRefPtr<CefBrowser> browser,

CefRefPtr<CefFrame> frame,

ErrorCode errorCode,

const CefString& errorText,

const CefString& failedUrl) {}