cef_load_handler.h

// Copyright (c) 2012 Marshall A. Greenblatt. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//    * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//    * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//    * Neither the name of Google Inc. nor the name Chromium Embedded
// Framework nor the names of its contributors may be used to endorse
// or promote products derived from this software without specific prior
// written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// ---------------------------------------------------------------------------
//
// The contents of this file must follow a specific format in order to
// support the CEF translator tool. See the translator.README.txt file in the
// tools directory for more information.
//

#ifndef CEF_INCLUDE_CEF_LOAD_HANDLER_H_
#define CEF_INCLUDE_CEF_LOAD_HANDLER_H_
#pragma once

#include "include/cef_base.h"
#include "include/cef_browser.h"
#include "include/cef_frame.h"

///
// Implement this interface to handle events related to browser load status. The
// methods of this class will be called on the browser process UI thread or
// render process main thread (TID_RENDERER).
///
/*--cef(source=client)--*/
class CefLoadHandler : public virtual CefBaseRefCounted {
 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) {}
};

#endif  // CEF_INCLUDE_CEF_LOAD_HANDLER_H_