cef/include/capi/cef_request_handler_capi.h

// Copyright (c) 2024 Marshall A. Greenblatt. All rights reserved.
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#ifndef CEF_INCLUDE_CAPI_CEF_REQUEST_HANDLER_CAPI_H_
#define CEF_INCLUDE_CAPI_CEF_REQUEST_HANDLER_CAPI_H_
#pragma once

#include "include/capi/cef_auth_callback_capi.h"
#include "include/capi/cef_base_capi.h"
#include "include/capi/cef_browser_capi.h"
#include "include/capi/cef_callback_capi.h"
#include "include/capi/cef_frame_capi.h"
#include "include/capi/cef_request_capi.h"
#include "include/capi/cef_resource_request_handler_capi.h"
#include "include/capi/cef_ssl_info_capi.h"
#include "include/capi/cef_unresponsive_process_callback_capi.h"
#include "include/capi/cef_x509_certificate_capi.h"

#ifdef __cplusplus
extern "C" {
#endif

///
/// Callback structure used to select a client certificate for authentication.
///
typedef struct _cef_select_client_certificate_callback_t {
  ///
  /// Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  /// Chooses the specified certificate for client certificate authentication.
  /// NULL value means that no client certificate should be used.
  ///
  void(CEF_CALLBACK* select)(
      struct _cef_select_client_certificate_callback_t* self,
      struct _cef_x509certificate_t* cert);
} cef_select_client_certificate_callback_t;

///
/// Implement this structure to handle events related to browser requests. The
/// functions of this structure will be called on the thread indicated.
///
typedef struct _cef_request_handler_t {
  ///
  /// Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  /// Called on the UI thread before browser navigation. Return true (1) to
  /// cancel the navigation or false (0) to allow the navigation to proceed. The
  /// |request| object cannot be modified in this callback.
  /// cef_load_handler_t::OnLoadingStateChange will be called twice in all
  /// cases. If the navigation is allowed cef_load_handler_t::OnLoadStart and
  /// cef_load_handler_t::OnLoadEnd will be called. If the navigation is
  /// canceled cef_load_handler_t::OnLoadError will be called with an
  /// |errorCode| value of ERR_ABORTED. The |user_gesture| value will be true
  /// (1) if the browser navigated via explicit user gesture (e.g. clicking a
  /// link) or false (0) if it navigated automatically (e.g. via the
  /// DomContentLoaded event).
  ///
  int(CEF_CALLBACK* on_before_browse)(struct _cef_request_handler_t* self,
                                      struct _cef_browser_t* browser,
                                      struct _cef_frame_t* frame,
                                      struct _cef_request_t* request,
                                      int user_gesture,
                                      int is_redirect);

  ///
  /// Called on the UI thread before OnBeforeBrowse in certain limited cases
  /// where navigating a new or different browser might be desirable. This
  /// includes user-initiated navigation that might open in a special way (e.g.
  /// links clicked via middle-click or ctrl + left-click) and certain types of
  /// cross-origin navigation initiated from the renderer process (e.g.
  /// navigating the top-level frame to/from a file URL). The |browser| and
  /// |frame| values represent the source of the navigation. The
  /// |target_disposition| value indicates where the user intended to navigate
  /// the browser based on standard Chromium behaviors (e.g. current tab, new
  /// tab, etc). The |user_gesture| value will be true (1) if the browser
  /// navigated via explicit user gesture (e.g. clicking a link) or false (0) if
  /// it navigated automatically (e.g. via the DomContentLoaded event). Return
  /// true (1) to cancel the navigation or false (0) to allow the navigation to
  /// proceed in the source browser's top-level frame.
  ///
  int(CEF_CALLBACK* on_open_urlfrom_tab)(
      struct _cef_request_handler_t* self,
      struct _cef_browser_t* browser,
      struct _cef_frame_t* frame,
      const cef_string_t* target_url,
      cef_window_open_disposition_t target_disposition,
      int user_gesture);

  ///
  /// Called on the browser process IO thread before a resource request is
  /// initiated. The |browser| and |frame| values represent the source of the
  /// request. |request| represents the request contents and cannot be modified
  /// in this callback. |is_navigation| will be true (1) if the resource request
  /// is a navigation. |is_download| will be true (1) if the resource request is
  /// a download. |request_initiator| is the origin (scheme + domain) of the
  /// page that initiated the request. Set |disable_default_handling| to true
  /// (1) to disable default handling of the request, in which case it will need
  /// to be handled via cef_resource_request_handler_t::GetResourceHandler or it
  /// will be canceled. To allow the resource load to proceed with default
  /// handling return NULL. To specify a handler for the resource return a
  /// cef_resource_request_handler_t object. If this callback returns NULL the
  /// same function will be called on the associated
  /// cef_request_context_handler_t, if any.
  ///
  struct _cef_resource_request_handler_t*(
      CEF_CALLBACK* get_resource_request_handler)(
      struct _cef_request_handler_t* self,
      struct _cef_browser_t* browser,
      struct _cef_frame_t* frame,
      struct _cef_request_t* request,
      int is_navigation,
      int is_download,
      const cef_string_t* request_initiator,
      int* disable_default_handling);

  ///
  /// Called on the IO thread when the browser needs credentials from the user.
  /// |origin_url| is the origin making this authentication request. |isProxy|
  /// indicates whether the host is a proxy server. |host| contains the hostname
  /// and |port| contains the port number. |realm| is the realm of the challenge
  /// and may be NULL. |scheme| is the authentication scheme used, such as
  /// "basic" or "digest", and will be NULL if the source of the request is an
  /// FTP server. Return true (1) to continue the request and call
  /// cef_auth_callback_t::cont() either in this function or at a later time
  /// when the authentication information is available. Return false (0) to
  /// cancel the request immediately.
  ///
  int(CEF_CALLBACK* get_auth_credentials)(
      struct _cef_request_handler_t* self,
      struct _cef_browser_t* browser,
      const cef_string_t* origin_url,
      int isProxy,
      const cef_string_t* host,
      int port,
      const cef_string_t* realm,
      const cef_string_t* scheme,
      struct _cef_auth_callback_t* callback);

  ///
  /// Called on the UI thread to handle requests for URLs with an invalid SSL
  /// certificate. Return true (1) and call cef_callback_t functions either in
  /// this function or at a later time to continue or cancel the request. Return
  /// false (0) to cancel the request immediately. If
  /// cef_settings_t.ignore_certificate_errors is set all invalid certificates
  /// will be accepted without calling this function.
  ///
  int(CEF_CALLBACK* on_certificate_error)(struct _cef_request_handler_t* self,
                                          struct _cef_browser_t* browser,
                                          cef_errorcode_t cert_error,
                                          const cef_string_t* request_url,
                                          struct _cef_sslinfo_t* ssl_info,
                                          struct _cef_callback_t* callback);

  ///
  /// Called on the UI thread when a client certificate is being requested for
  /// authentication. Return false (0) to use the default behavior and
  /// automatically select the first certificate available. Return true (1) and
  /// call cef_select_client_certificate_callback_t::Select either in this
  /// function or at a later time to select a certificate. Do not call Select or
  /// call it with NULL to continue without using any certificate. |isProxy|
  /// indicates whether the host is an HTTPS proxy or the origin server. |host|
  /// and |port| contains the hostname and port of the SSL server.
  /// |certificates| is the list of certificates to choose from; this list has
  /// already been pruned by Chromium so that it only contains certificates from
  /// issuers that the server trusts.
  ///
  int(CEF_CALLBACK* on_select_client_certificate)(
      struct _cef_request_handler_t* self,
      struct _cef_browser_t* browser,
      int isProxy,
      const cef_string_t* host,
      int port,
      size_t certificatesCount,
      struct _cef_x509certificate_t* const* certificates,
      struct _cef_select_client_certificate_callback_t* callback);

  ///
  /// Called on the browser process UI thread when the render view associated
  /// with |browser| is ready to receive/handle IPC messages in the render
  /// process.
  ///
  void(CEF_CALLBACK* on_render_view_ready)(struct _cef_request_handler_t* self,
                                           struct _cef_browser_t* browser);

  ///
  /// Called on the browser process UI thread when the render process is
  /// unresponsive as indicated by a lack of input event processing for at least
  /// 15 seconds. Return false (0) for the default behavior which is an
  /// indefinite wait with Alloy style or display of the "Page unresponsive"
  /// dialog with Chrome style. Return true (1) and don't execute the callback
  /// for an indefinite wait without display of the Chrome style dialog. Return
  /// true (1) and call cef_unresponsive_process_callback_t::Wait either in this
  /// function or at a later time to reset the wait timer, potentially
  /// triggering another call to this function if the process remains
  /// unresponsive. Return true (1) and call
  /// cef_unresponsive_process_callback_t:: Terminate either in this function or
  /// at a later time to terminate the unresponsive process, resulting in a call
  /// to OnRenderProcessTerminated. OnRenderProcessResponsive will be called if
  /// the process becomes responsive after this function is called. This
  /// functionality depends on the hang monitor which can be disabled by passing
  /// the `--disable-hang-monitor` command-line flag.
  ///
  int(CEF_CALLBACK* on_render_process_unresponsive)(
      struct _cef_request_handler_t* self,
      struct _cef_browser_t* browser,
      struct _cef_unresponsive_process_callback_t* callback);

  ///
  /// Called on the browser process UI thread when the render process becomes
  /// responsive after previously being unresponsive. See documentation on
  /// OnRenderProcessUnresponsive.
  ///
  void(CEF_CALLBACK* on_render_process_responsive)(
      struct _cef_request_handler_t* self,
      struct _cef_browser_t* browser);

  ///
  /// Called on the browser process UI thread when the render process terminates
  /// unexpectedly. |status| indicates how the process terminated. |error_code|
  /// and |error_string| represent the error that would be displayed in Chrome's
  /// "Aw, Snap!" view. Possible |error_code| values include cef_resultcode_t
  /// non-normal exit values and platform-specific crash values (for example, a
  /// Posix signal or Windows hardware exception).
  ///
  void(CEF_CALLBACK* on_render_process_terminated)(
      struct _cef_request_handler_t* self,
      struct _cef_browser_t* browser,
      cef_termination_status_t status,
      int error_code,
      const cef_string_t* error_string);

  ///
  /// Called on the browser process UI thread when the window.document object of
  /// the main frame has been created.
  ///
  void(CEF_CALLBACK* on_document_available_in_main_frame)(
      struct _cef_request_handler_t* self,
      struct _cef_browser_t* browser);
} cef_request_handler_t;

#ifdef __cplusplus
}
#endif

#endif  // CEF_INCLUDE_CAPI_CEF_REQUEST_HANDLER_CAPI_H_