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 when the browser begins loading a 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

// always be called for all frames irrespective of whether the request

// completes successfully. 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 always be called for all frames irrespective of whether the request

// completes successfully. For notification of overall browser load status use

// OnLoadingStateChange instead.

///

/*--cef()--*/

virtual void OnLoadEnd(CefRefPtr<CefBrowser> browser,

CefRefPtr<CefFrame> frame,

int httpStatusCode) {}

///

// Called when the resource load for a navigation fails or is canceled.

// |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) {}