src/include/capi/cef_browser_capi.h

// Copyright (c) 2020 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
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//    * Redistributions in binary form must reproduce the above
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// ---------------------------------------------------------------------------
//
// This file was generated by the CEF translator tool and should not edited
// by hand. See the translator.README.txt file in the tools directory for
// more information.
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// $hash=6cb00a0fa3631a46903abb3a783f315895511db2$
//

#ifndef CEF_INCLUDE_CAPI_CEF_BROWSER_CAPI_H_
#define CEF_INCLUDE_CAPI_CEF_BROWSER_CAPI_H_
#pragma once

#include "include/capi/cef_base_capi.h"
#include "include/capi/cef_devtools_message_observer_capi.h"
#include "include/capi/cef_drag_data_capi.h"
#include "include/capi/cef_frame_capi.h"
#include "include/capi/cef_image_capi.h"
#include "include/capi/cef_navigation_entry_capi.h"
#include "include/capi/cef_registration_capi.h"
#include "include/capi/cef_request_context_capi.h"

#ifdef __cplusplus
extern "C" {
#endif

struct _cef_browser_host_t;
struct _cef_client_t;

///
// Structure used to represent a browser window. When used in the browser
// process the functions of this structure may be called on any thread unless
// otherwise indicated in the comments. When used in the render process the
// functions of this structure may only be called on the main thread.
///
typedef struct _cef_browser_t {
  ///
  // Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  // Returns the browser host object. This function can only be called in the
  // browser process.
  ///
  struct _cef_browser_host_t*(CEF_CALLBACK* get_host)(
      struct _cef_browser_t* self);

  ///
  // Returns true (1) if the browser can navigate backwards.
  ///
  int(CEF_CALLBACK* can_go_back)(struct _cef_browser_t* self);

  ///
  // Navigate backwards.
  ///
  void(CEF_CALLBACK* go_back)(struct _cef_browser_t* self);

  ///
  // Returns true (1) if the browser can navigate forwards.
  ///
  int(CEF_CALLBACK* can_go_forward)(struct _cef_browser_t* self);

  ///
  // Navigate forwards.
  ///
  void(CEF_CALLBACK* go_forward)(struct _cef_browser_t* self);

  ///
  // Returns true (1) if the browser is currently loading.
  ///
  int(CEF_CALLBACK* is_loading)(struct _cef_browser_t* self);

  ///
  // Reload the current page.
  ///
  void(CEF_CALLBACK* reload)(struct _cef_browser_t* self);

  ///
  // Reload the current page ignoring any cached data.
  ///
  void(CEF_CALLBACK* reload_ignore_cache)(struct _cef_browser_t* self);

  ///
  // Stop loading the page.
  ///
  void(CEF_CALLBACK* stop_load)(struct _cef_browser_t* self);

  ///
  // Returns the globally unique identifier for this browser. This value is also
  // used as the tabId for extension APIs.
  ///
  int(CEF_CALLBACK* get_identifier)(struct _cef_browser_t* self);

  ///
  // Returns true (1) if this object is pointing to the same handle as |that|
  // object.
  ///
  int(CEF_CALLBACK* is_same)(struct _cef_browser_t* self,
                             struct _cef_browser_t* that);

  ///
  // Returns true (1) if the window is a popup window.
  ///
  int(CEF_CALLBACK* is_popup)(struct _cef_browser_t* self);

  ///
  // Returns true (1) if a document has been loaded in the browser.
  ///
  int(CEF_CALLBACK* has_document)(struct _cef_browser_t* self);

  ///
  // Returns the main (top-level) frame for the browser window.
  ///
  struct _cef_frame_t*(CEF_CALLBACK* get_main_frame)(
      struct _cef_browser_t* self);

  ///
  // Returns the focused frame for the browser window.
  ///
  struct _cef_frame_t*(CEF_CALLBACK* get_focused_frame)(
      struct _cef_browser_t* self);

  ///
  // Returns the frame with the specified identifier, or NULL if not found.
  ///
  struct _cef_frame_t*(CEF_CALLBACK* get_frame_byident)(
      struct _cef_browser_t* self,
      int64 identifier);

  ///
  // Returns the frame with the specified name, or NULL if not found.
  ///
  struct _cef_frame_t*(CEF_CALLBACK* get_frame)(struct _cef_browser_t* self,
                                                const cef_string_t* name);

  ///
  // Returns the number of frames that currently exist.
  ///
  size_t(CEF_CALLBACK* get_frame_count)(struct _cef_browser_t* self);

  ///
  // Returns the identifiers of all existing frames.
  ///
  void(CEF_CALLBACK* get_frame_identifiers)(struct _cef_browser_t* self,
                                            size_t* identifiersCount,
                                            int64* identifiers);

  ///
  // Returns the names of all existing frames.
  ///
  void(CEF_CALLBACK* get_frame_names)(struct _cef_browser_t* self,
                                      cef_string_list_t names);
} cef_browser_t;

///
// Callback structure for cef_browser_host_t::RunFileDialog. The functions of
// this structure will be called on the browser process UI thread.
///
typedef struct _cef_run_file_dialog_callback_t {
  ///
  // Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  // Called asynchronously after the file dialog is dismissed.
  // |selected_accept_filter| is the 0-based index of the value selected from
  // the accept filters array passed to cef_browser_host_t::RunFileDialog.
  // |file_paths| will be a single value or a list of values depending on the
  // dialog mode. If the selection was cancelled |file_paths| will be NULL.
  ///
  void(CEF_CALLBACK* on_file_dialog_dismissed)(
      struct _cef_run_file_dialog_callback_t* self,
      int selected_accept_filter,
      cef_string_list_t file_paths);
} cef_run_file_dialog_callback_t;

///
// Callback structure for cef_browser_host_t::GetNavigationEntries. The
// functions of this structure will be called on the browser process UI thread.
///
typedef struct _cef_navigation_entry_visitor_t {
  ///
  // Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  // Method that will be executed. Do not keep a reference to |entry| outside of
  // this callback. Return true (1) to continue visiting entries or false (0) to
  // stop. |current| is true (1) if this entry is the currently loaded
  // navigation entry. |index| is the 0-based index of this entry and |total| is
  // the total number of entries.
  ///
  int(CEF_CALLBACK* visit)(struct _cef_navigation_entry_visitor_t* self,
                           struct _cef_navigation_entry_t* entry,
                           int current,
                           int index,
                           int total);
} cef_navigation_entry_visitor_t;

///
// Callback structure for cef_browser_host_t::PrintToPDF. The functions of this
// structure will be called on the browser process UI thread.
///
typedef struct _cef_pdf_print_callback_t {
  ///
  // Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  // Method that will be executed when the PDF printing has completed. |path| is
  // the output path. |ok| will be true (1) if the printing completed
  // successfully or false (0) otherwise.
  ///
  void(CEF_CALLBACK* on_pdf_print_finished)(
      struct _cef_pdf_print_callback_t* self,
      const cef_string_t* path,
      int ok);
} cef_pdf_print_callback_t;

///
// Callback structure for cef_browser_host_t::DownloadImage. The functions of
// this structure will be called on the browser process UI thread.
///
typedef struct _cef_download_image_callback_t {
  ///
  // Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  // Method that will be executed when the image download has completed.
  // |image_url| is the URL that was downloaded and |http_status_code| is the
  // resulting HTTP status code. |image| is the resulting image, possibly at
  // multiple scale factors, or NULL if the download failed.
  ///
  void(CEF_CALLBACK* on_download_image_finished)(
      struct _cef_download_image_callback_t* self,
      const cef_string_t* image_url,
      int http_status_code,
      struct _cef_image_t* image);
} cef_download_image_callback_t;

///
// Structure used to represent the browser process aspects of a browser window.
// The functions of this structure can only be called in the browser process.
// They may be called on any thread in that process unless otherwise indicated
// in the comments.
///
typedef struct _cef_browser_host_t {
  ///
  // Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  // Returns the hosted browser object.
  ///
  struct _cef_browser_t*(CEF_CALLBACK* get_browser)(
      struct _cef_browser_host_t* self);

  ///
  // Request that the browser close. The JavaScript 'onbeforeunload' event will
  // be fired. If |force_close| is false (0) the event handler, if any, will be
  // allowed to prompt the user and the user can optionally cancel the close. If
  // |force_close| is true (1) the prompt will not be displayed and the close
  // will proceed. Results in a call to cef_life_span_handler_t::do_close() if
  // the event handler allows the close or if |force_close| is true (1). See
  // cef_life_span_handler_t::do_close() documentation for additional usage
  // information.
  ///
  void(CEF_CALLBACK* close_browser)(struct _cef_browser_host_t* self,
                                    int force_close);

  ///
  // Helper for closing a browser. Call this function from the top-level window
  // close handler. Internally this calls CloseBrowser(false (0)) if the close
  // has not yet been initiated. This function returns false (0) while the close
  // is pending and true (1) after the close has completed. See close_browser()
  // and cef_life_span_handler_t::do_close() documentation for additional usage
  // information. This function must be called on the browser process UI thread.
  ///
  int(CEF_CALLBACK* try_close_browser)(struct _cef_browser_host_t* self);

  ///
  // Set whether the browser is focused.
  ///
  void(CEF_CALLBACK* set_focus)(struct _cef_browser_host_t* self, int focus);

  ///
  // Retrieve the window handle for this browser. If this browser is wrapped in
  // a cef_browser_view_t this function should be called on the browser process
  // UI thread and it will return the handle for the top-level native window.
  ///
  cef_window_handle_t(CEF_CALLBACK* get_window_handle)(
      struct _cef_browser_host_t* self);

  ///
  // Retrieve the window handle of the browser that opened this browser. Will
  // return NULL for non-popup windows or if this browser is wrapped in a
  // cef_browser_view_t. This function can be used in combination with custom
  // handling of modal windows.
  ///
  cef_window_handle_t(CEF_CALLBACK* get_opener_window_handle)(
      struct _cef_browser_host_t* self);

  ///
  // Returns true (1) if this browser is wrapped in a cef_browser_view_t.
  ///
  int(CEF_CALLBACK* has_view)(struct _cef_browser_host_t* self);

  ///
  // Returns the client for this browser.
  ///
  struct _cef_client_t*(CEF_CALLBACK* get_client)(
      struct _cef_browser_host_t* self);

  ///
  // Returns the request context for this browser.
  ///
  struct _cef_request_context_t*(CEF_CALLBACK* get_request_context)(
      struct _cef_browser_host_t* self);

  ///
  // Get the current zoom level. The default zoom level is 0.0. This function
  // can only be called on the UI thread.
  ///
  double(CEF_CALLBACK* get_zoom_level)(struct _cef_browser_host_t* self);

  ///
  // Change the zoom level to the specified value. Specify 0.0 to reset the zoom
  // level. If called on the UI thread the change will be applied immediately.
  // Otherwise, the change will be applied asynchronously on the UI thread.
  ///
  void(CEF_CALLBACK* set_zoom_level)(struct _cef_browser_host_t* self,
                                     double zoomLevel);

  ///
  // Call to run a file chooser dialog. Only a single file chooser dialog may be
  // pending at any given time. |mode| represents the type of dialog to display.
  // |title| to the title to be used for the dialog and may be NULL to show the
  // default title ("Open" or "Save" depending on the mode). |default_file_path|
  // is the path with optional directory and/or file name component that will be
  // initially selected in the dialog. |accept_filters| are used to restrict the
  // selectable file types and may any combination of (a) valid lower-cased MIME
  // types (e.g. "text/*" or "image/*"), (b) individual file extensions (e.g.
  // ".txt" or ".png"), or (c) combined description and file extension delimited
  // using "|" and ";" (e.g. "Image Types|.png;.gif;.jpg").
  // |selected_accept_filter| is the 0-based index of the filter that will be
  // selected by default. |callback| will be executed after the dialog is
  // dismissed or immediately if another dialog is already pending. The dialog
  // will be initiated asynchronously on the UI thread.
  ///
  void(CEF_CALLBACK* run_file_dialog)(
      struct _cef_browser_host_t* self,
      cef_file_dialog_mode_t mode,
      const cef_string_t* title,
      const cef_string_t* default_file_path,
      cef_string_list_t accept_filters,
      int selected_accept_filter,
      struct _cef_run_file_dialog_callback_t* callback);

  ///
  // Download the file at |url| using cef_download_handler_t.
  ///
  void(CEF_CALLBACK* start_download)(struct _cef_browser_host_t* self,
                                     const cef_string_t* url);

  ///
  // Download |image_url| and execute |callback| on completion with the images
  // received from the renderer. If |is_favicon| is true (1) then cookies are
  // not sent and not accepted during download. Images with density independent
  // pixel (DIP) sizes larger than |max_image_size| are filtered out from the
  // image results. Versions of the image at different scale factors may be
  // downloaded up to the maximum scale factor supported by the system. If there
  // are no image results <= |max_image_size| then the smallest image is resized
  // to |max_image_size| and is the only result. A |max_image_size| of 0 means
  // unlimited. If |bypass_cache| is true (1) then |image_url| is requested from
  // the server even if it is present in the browser cache.
  ///
  void(CEF_CALLBACK* download_image)(
      struct _cef_browser_host_t* self,
      const cef_string_t* image_url,
      int is_favicon,
      uint32 max_image_size,
      int bypass_cache,
      struct _cef_download_image_callback_t* callback);

  ///
  // Print the current browser contents.
  ///
  void(CEF_CALLBACK* print)(struct _cef_browser_host_t* self);

  ///
  // Print the current browser contents to the PDF file specified by |path| and
  // execute |callback| on completion. The caller is responsible for deleting
  // |path| when done. For PDF printing to work on Linux you must implement the
  // cef_print_handler_t::GetPdfPaperSize function.
  ///
  void(CEF_CALLBACK* print_to_pdf)(
      struct _cef_browser_host_t* self,
      const cef_string_t* path,
      const struct _cef_pdf_print_settings_t* settings,
      struct _cef_pdf_print_callback_t* callback);

  ///
  // Search for |searchText|. |identifier| must be a unique ID and these IDs
  // must strictly increase so that newer requests always have greater IDs than
  // older requests. If |identifier| is zero or less than the previous ID value
  // then it will be automatically assigned a new valid ID. |forward| indicates
  // whether to search forward or backward within the page. |matchCase|
  // indicates whether the search should be case-sensitive. |findNext| indicates
  // whether this is the first request or a follow-up. The cef_find_handler_t
  // instance, if any, returned via cef_client_t::GetFindHandler will be called
  // to report find results.
  ///
  void(CEF_CALLBACK* find)(struct _cef_browser_host_t* self,
                           int identifier,
                           const cef_string_t* searchText,
                           int forward,
                           int matchCase,
                           int findNext);

  ///
  // Cancel all searches that are currently going on.
  ///
  void(CEF_CALLBACK* stop_finding)(struct _cef_browser_host_t* self,
                                   int clearSelection);

  ///
  // Open developer tools (DevTools) in its own browser. The DevTools browser
  // will remain associated with this browser. If the DevTools browser is
  // already open then it will be focused, in which case the |windowInfo|,
  // |client| and |settings| parameters will be ignored. If |inspect_element_at|
  // is non-NULL then the element at the specified (x,y) location will be
  // inspected. The |windowInfo| parameter will be ignored if this browser is
  // wrapped in a cef_browser_view_t.
  ///
  void(CEF_CALLBACK* show_dev_tools)(
      struct _cef_browser_host_t* self,
      const struct _cef_window_info_t* windowInfo,
      struct _cef_client_t* client,
      const struct _cef_browser_settings_t* settings,
      const cef_point_t* inspect_element_at);

  ///
  // Explicitly close the associated DevTools browser, if any.
  ///
  void(CEF_CALLBACK* close_dev_tools)(struct _cef_browser_host_t* self);

  ///
  // Returns true (1) if this browser currently has an associated DevTools
  // browser. Must be called on the browser process UI thread.
  ///
  int(CEF_CALLBACK* has_dev_tools)(struct _cef_browser_host_t* self);

  ///
  // Send a function call message over the DevTools protocol. |message| must be
  // a UTF8-encoded JSON dictionary that contains "id" (int), "function"
  // (string) and "params" (dictionary, optional) values. See the DevTools
  // protocol documentation at https://chromedevtools.github.io/devtools-
  // protocol/ for details of supported functions and the expected "params"
  // dictionary contents. |message| will be copied if necessary. This function
  // will return true (1) if called on the UI thread and the message was
  // successfully submitted for validation, otherwise false (0). Validation will
  // be applied asynchronously and any messages that fail due to formatting
  // errors or missing parameters may be discarded without notification. Prefer
  // ExecuteDevToolsMethod if a more structured approach to message formatting
  // is desired.
  //
  // Every valid function call will result in an asynchronous function result or
  // error message that references the sent message "id". Event messages are
  // received while notifications are enabled (for example, between function
  // calls for "Page.enable" and "Page.disable"). All received messages will be
  // delivered to the observer(s) registered with AddDevToolsMessageObserver.
  // See cef_dev_tools_message_observer_t::OnDevToolsMessage documentation for
  // details of received message contents.
  //
  // Usage of the SendDevToolsMessage, ExecuteDevToolsMethod and
  // AddDevToolsMessageObserver functions does not require an active DevTools
  // front-end or remote-debugging session. Other active DevTools sessions will
  // continue to function independently. However, any modification of global
  // browser state by one session may not be reflected in the UI of other
  // sessions.
  //
  // Communication with the DevTools front-end (when displayed) can be logged
  // for development purposes by passing the `--devtools-protocol-log-
  // file=<path>` command-line flag.
  ///
  int(CEF_CALLBACK* send_dev_tools_message)(struct _cef_browser_host_t* self,
                                            const void* message,
                                            size_t message_size);

  ///
  // Execute a function call over the DevTools protocol. This is a more
  // structured version of SendDevToolsMessage. |message_id| is an incremental
  // number that uniquely identifies the message (pass 0 to have the next number
  // assigned automatically based on previous values). |function| is the
  // function name. |params| are the function parameters, which may be NULL. See
  // the DevTools protocol documentation (linked above) for details of supported
  // functions and the expected |params| dictionary contents. This function will
  // return the assigned message ID if called on the UI thread and the message
  // was successfully submitted for validation, otherwise 0. See the
  // SendDevToolsMessage documentation for additional usage information.
  ///
  int(CEF_CALLBACK* execute_dev_tools_method)(
      struct _cef_browser_host_t* self,
      int message_id,
      const cef_string_t* method,
      struct _cef_dictionary_value_t* params);

  ///
  // Add an observer for DevTools protocol messages (function results and
  // events). The observer will remain registered until the returned
  // Registration object is destroyed. See the SendDevToolsMessage documentation
  // for additional usage information.
  ///
  struct _cef_registration_t*(CEF_CALLBACK* add_dev_tools_message_observer)(
      struct _cef_browser_host_t* self,
      struct _cef_dev_tools_message_observer_t* observer);

  ///
  // Retrieve a snapshot of current navigation entries as values sent to the
  // specified visitor. If |current_only| is true (1) only the current
  // navigation entry will be sent, otherwise all navigation entries will be
  // sent.
  ///
  void(CEF_CALLBACK* get_navigation_entries)(
      struct _cef_browser_host_t* self,
      struct _cef_navigation_entry_visitor_t* visitor,
      int current_only);

  ///
  // Set whether mouse cursor change is disabled.
  ///
  void(CEF_CALLBACK* set_mouse_cursor_change_disabled)(
      struct _cef_browser_host_t* self,
      int disabled);

  ///
  // Returns true (1) if mouse cursor change is disabled.
  ///
  int(CEF_CALLBACK* is_mouse_cursor_change_disabled)(
      struct _cef_browser_host_t* self);

  ///
  // If a misspelled word is currently selected in an editable node calling this
  // function will replace it with the specified |word|.
  ///
  void(CEF_CALLBACK* replace_misspelling)(struct _cef_browser_host_t* self,
                                          const cef_string_t* word);

  ///
  // Add the specified |word| to the spelling dictionary.
  ///
  void(CEF_CALLBACK* add_word_to_dictionary)(struct _cef_browser_host_t* self,
                                             const cef_string_t* word);

  ///
  // Returns true (1) if window rendering is disabled.
  ///
  int(CEF_CALLBACK* is_window_rendering_disabled)(
      struct _cef_browser_host_t* self);

  ///
  // Notify the browser that the widget has been resized. The browser will first
  // call cef_render_handler_t::GetViewRect to get the new size and then call
  // cef_render_handler_t::OnPaint asynchronously with the updated regions. This
  // function is only used when window rendering is disabled.
  ///
  void(CEF_CALLBACK* was_resized)(struct _cef_browser_host_t* self);

  ///
  // Notify the browser that it has been hidden or shown. Layouting and
  // cef_render_handler_t::OnPaint notification will stop when the browser is
  // hidden. This function is only used when window rendering is disabled.
  ///
  void(CEF_CALLBACK* was_hidden)(struct _cef_browser_host_t* self, int hidden);

  ///
  // Send a notification to the browser that the screen info has changed. The
  // browser will then call cef_render_handler_t::GetScreenInfo to update the
  // screen information with the new values. This simulates moving the webview
  // window from one display to another, or changing the properties of the
  // current display. This function is only used when window rendering is
  // disabled.
  ///
  void(CEF_CALLBACK* notify_screen_info_changed)(
      struct _cef_browser_host_t* self);

  ///
  // Invalidate the view. The browser will call cef_render_handler_t::OnPaint
  // asynchronously. This function is only used when window rendering is
  // disabled.
  ///
  void(CEF_CALLBACK* invalidate)(struct _cef_browser_host_t* self,
                                 cef_paint_element_type_t type);

  ///
  // Issue a BeginFrame request to Chromium.  Only valid when
  // cef_window_tInfo::external_begin_frame_enabled is set to true (1).
  ///
  void(CEF_CALLBACK* send_external_begin_frame)(
      struct _cef_browser_host_t* self);

  ///
  // Send a key event to the browser.
  ///
  void(CEF_CALLBACK* send_key_event)(struct _cef_browser_host_t* self,
                                     const struct _cef_key_event_t* event);

  ///
  // Send a mouse click event to the browser. The |x| and |y| coordinates are
  // relative to the upper-left corner of the view.
  ///
  void(CEF_CALLBACK* send_mouse_click_event)(
      struct _cef_browser_host_t* self,
      const struct _cef_mouse_event_t* event,
      cef_mouse_button_type_t type,
      int mouseUp,
      int clickCount);

  ///
  // Send a mouse move event to the browser. The |x| and |y| coordinates are
  // relative to the upper-left corner of the view.
  ///
  void(CEF_CALLBACK* send_mouse_move_event)(
      struct _cef_browser_host_t* self,
      const struct _cef_mouse_event_t* event,
      int mouseLeave);

  ///
  // Send a mouse wheel event to the browser. The |x| and |y| coordinates are
  // relative to the upper-left corner of the view. The |deltaX| and |deltaY|
  // values represent the movement delta in the X and Y directions respectively.
  // In order to scroll inside select popups with window rendering disabled
  // cef_render_handler_t::GetScreenPoint should be implemented properly.
  ///
  void(CEF_CALLBACK* send_mouse_wheel_event)(
      struct _cef_browser_host_t* self,
      const struct _cef_mouse_event_t* event,
      int deltaX,
      int deltaY);

  ///
  // Send a touch event to the browser for a windowless browser.
  ///
  void(CEF_CALLBACK* send_touch_event)(struct _cef_browser_host_t* self,
                                       const struct _cef_touch_event_t* event);

  ///
  // Send a focus event to the browser.
  ///
  void(CEF_CALLBACK* send_focus_event)(struct _cef_browser_host_t* self,
                                       int setFocus);

  ///
  // Send a capture lost event to the browser.
  ///
  void(CEF_CALLBACK* send_capture_lost_event)(struct _cef_browser_host_t* self);

  ///
  // Notify the browser that the window hosting it is about to be moved or
  // resized. This function is only used on Windows and Linux.
  ///
  void(CEF_CALLBACK* notify_move_or_resize_started)(
      struct _cef_browser_host_t* self);

  ///
  // Returns the maximum rate in frames per second (fps) that
  // cef_render_handler_t:: OnPaint will be called for a windowless browser. The
  // actual fps may be lower if the browser cannot generate frames at the
  // requested rate. The minimum value is 1 and the maximum value is 60 (default
  // 30). This function can only be called on the UI thread.
  ///
  int(CEF_CALLBACK* get_windowless_frame_rate)(
      struct _cef_browser_host_t* self);

  ///
  // Set the maximum rate in frames per second (fps) that cef_render_handler_t::
  // OnPaint will be called for a windowless browser. The actual fps may be
  // lower if the browser cannot generate frames at the requested rate. The
  // minimum value is 1 and the maximum value is 60 (default 30). Can also be
  // set at browser creation via cef_browser_tSettings.windowless_frame_rate.
  ///
  void(CEF_CALLBACK* set_windowless_frame_rate)(
      struct _cef_browser_host_t* self,
      int frame_rate);

  ///
  // Begins a new composition or updates the existing composition. Blink has a
  // special node (a composition node) that allows the input function to change
  // text without affecting other DOM nodes. |text| is the optional text that
  // will be inserted into the composition node. |underlines| is an optional set
  // of ranges that will be underlined in the resulting text.
  // |replacement_range| is an optional range of the existing text that will be
  // replaced. |selection_range| is an optional range of the resulting text that
  // will be selected after insertion or replacement. The |replacement_range|
  // value is only used on OS X.
  //
  // This function may be called multiple times as the composition changes. When
  // the client is done making changes the composition should either be canceled
  // or completed. To cancel the composition call ImeCancelComposition. To
  // complete the composition call either ImeCommitText or
  // ImeFinishComposingText. Completion is usually signaled when:
  //   A. The client receives a WM_IME_COMPOSITION message with a GCS_RESULTSTR
  //      flag (on Windows), or;
  //   B. The client receives a "commit" signal of GtkIMContext (on Linux), or;
  //   C. insertText of NSTextInput is called (on Mac).
  //
  // This function is only used when window rendering is disabled.
  ///
  void(CEF_CALLBACK* ime_set_composition)(
      struct _cef_browser_host_t* self,
      const cef_string_t* text,
      size_t underlinesCount,
      cef_composition_underline_t const* underlines,
      const cef_range_t* replacement_range,
      const cef_range_t* selection_range);

  ///
  // Completes the existing composition by optionally inserting the specified
  // |text| into the composition node. |replacement_range| is an optional range
  // of the existing text that will be replaced. |relative_cursor_pos| is where
  // the cursor will be positioned relative to the current cursor position. See
  // comments on ImeSetComposition for usage. The |replacement_range| and
  // |relative_cursor_pos| values are only used on OS X. This function is only
  // used when window rendering is disabled.
  ///
  void(CEF_CALLBACK* ime_commit_text)(struct _cef_browser_host_t* self,
                                      const cef_string_t* text,
                                      const cef_range_t* replacement_range,
                                      int relative_cursor_pos);

  ///
  // Completes the existing composition by applying the current composition node
  // contents. If |keep_selection| is false (0) the current selection, if any,
  // will be discarded. See comments on ImeSetComposition for usage. This
  // function is only used when window rendering is disabled.
  ///
  void(CEF_CALLBACK* ime_finish_composing_text)(
      struct _cef_browser_host_t* self,
      int keep_selection);

  ///
  // Cancels the existing composition and discards the composition node contents
  // without applying them. See comments on ImeSetComposition for usage. This
  // function is only used when window rendering is disabled.
  ///
  void(CEF_CALLBACK* ime_cancel_composition)(struct _cef_browser_host_t* self);

  ///
  // Call this function when the user drags the mouse into the web view (before
  // calling DragTargetDragOver/DragTargetLeave/DragTargetDrop). |drag_data|
  // should not contain file contents as this type of data is not allowed to be
  // dragged into the web view. File contents can be removed using
  // cef_drag_data_t::ResetFileContents (for example, if |drag_data| comes from
  // cef_render_handler_t::StartDragging). This function is only used when
  // window rendering is disabled.
  ///
  void(CEF_CALLBACK* drag_target_drag_enter)(
      struct _cef_browser_host_t* self,
      struct _cef_drag_data_t* drag_data,
      const struct _cef_mouse_event_t* event,
      cef_drag_operations_mask_t allowed_ops);

  ///
  // Call this function each time the mouse is moved across the web view during
  // a drag operation (after calling DragTargetDragEnter and before calling
  // DragTargetDragLeave/DragTargetDrop). This function is only used when window
  // rendering is disabled.
  ///
  void(CEF_CALLBACK* drag_target_drag_over)(
      struct _cef_browser_host_t* self,
      const struct _cef_mouse_event_t* event,
      cef_drag_operations_mask_t allowed_ops);

  ///
  // Call this function when the user drags the mouse out of the web view (after
  // calling DragTargetDragEnter). This function is only used when window
  // rendering is disabled.
  ///
  void(CEF_CALLBACK* drag_target_drag_leave)(struct _cef_browser_host_t* self);

  ///
  // Call this function when the user completes the drag operation by dropping
  // the object onto the web view (after calling DragTargetDragEnter). The
  // object being dropped is |drag_data|, given as an argument to the previous
  // DragTargetDragEnter call. This function is only used when window rendering
  // is disabled.
  ///
  void(CEF_CALLBACK* drag_target_drop)(struct _cef_browser_host_t* self,
                                       const struct _cef_mouse_event_t* event);

  ///
  // Call this function when the drag operation started by a
  // cef_render_handler_t::StartDragging call has ended either in a drop or by
  // being cancelled. |x| and |y| are mouse coordinates relative to the upper-
  // left corner of the view. If the web view is both the drag source and the
  // drag target then all DragTarget* functions should be called before
  // DragSource* mthods. This function is only used when window rendering is
  // disabled.
  ///
  void(CEF_CALLBACK* drag_source_ended_at)(struct _cef_browser_host_t* self,
                                           int x,
                                           int y,
                                           cef_drag_operations_mask_t op);

  ///
  // Call this function when the drag operation started by a
  // cef_render_handler_t::StartDragging call has completed. This function may
  // be called immediately without first calling DragSourceEndedAt to cancel a
  // drag operation. If the web view is both the drag source and the drag target
  // then all DragTarget* functions should be called before DragSource* mthods.
  // This function is only used when window rendering is disabled.
  ///
  void(CEF_CALLBACK* drag_source_system_drag_ended)(
      struct _cef_browser_host_t* self);

  ///
  // Returns the current visible navigation entry for this browser. This
  // function can only be called on the UI thread.
  ///
  struct _cef_navigation_entry_t*(CEF_CALLBACK* get_visible_navigation_entry)(
      struct _cef_browser_host_t* self);

  ///
  // Set accessibility state for all frames. |accessibility_state| may be
  // default, enabled or disabled. If |accessibility_state| is STATE_DEFAULT
  // then accessibility will be disabled by default and the state may be further
  // controlled with the "force-renderer-accessibility" and "disable-renderer-
  // accessibility" command-line switches. If |accessibility_state| is
  // STATE_ENABLED then accessibility will be enabled. If |accessibility_state|
  // is STATE_DISABLED then accessibility will be completely disabled.
  //
  // For windowed browsers accessibility will be enabled in Complete mode (which
  // corresponds to kAccessibilityModeComplete in Chromium). In this mode all
  // platform accessibility objects will be created and managed by Chromium's
  // internal implementation. The client needs only to detect the screen reader
  // and call this function appropriately. For example, on macOS the client can
  // handle the @"AXEnhancedUserStructure" accessibility attribute to detect
  // VoiceOver state changes and on Windows the client can handle WM_GETOBJECT
  // with OBJID_CLIENT to detect accessibility readers.
  //
  // For windowless browsers accessibility will be enabled in TreeOnly mode
  // (which corresponds to kAccessibilityModeWebContentsOnly in Chromium). In
  // this mode renderer accessibility is enabled, the full tree is computed, and
  // events are passed to CefAccessibiltyHandler, but platform accessibility
  // objects are not created. The client may implement platform accessibility
  // objects using CefAccessibiltyHandler callbacks if desired.
  ///
  void(CEF_CALLBACK* set_accessibility_state)(struct _cef_browser_host_t* self,
                                              cef_state_t accessibility_state);

  ///
  // Enable notifications of auto resize via
  // cef_display_handler_t::OnAutoResize. Notifications are disabled by default.
  // |min_size| and |max_size| define the range of allowed sizes.
  ///
  void(CEF_CALLBACK* set_auto_resize_enabled)(struct _cef_browser_host_t* self,
                                              int enabled,
                                              const cef_size_t* min_size,
                                              const cef_size_t* max_size);

  ///
  // Returns the extension hosted in this browser or NULL if no extension is
  // hosted. See cef_request_context_t::LoadExtension for details.
  ///
  struct _cef_extension_t*(CEF_CALLBACK* get_extension)(
      struct _cef_browser_host_t* self);

  ///
  // Returns true (1) if this browser is hosting an extension background script.
  // Background hosts do not have a window and are not displayable. See
  // cef_request_context_t::LoadExtension for details.
  ///
  int(CEF_CALLBACK* is_background_host)(struct _cef_browser_host_t* self);

  ///
  //  Set whether the browser's audio is muted.
  ///
  void(CEF_CALLBACK* set_audio_muted)(struct _cef_browser_host_t* self,
                                      int mute);

  ///
  // Returns true (1) if the browser's audio is muted.  This function can only
  // be called on the UI thread.
  ///
  int(CEF_CALLBACK* is_audio_muted)(struct _cef_browser_host_t* self);
} cef_browser_host_t;

///
// Create a new browser window using the window parameters specified by
// |windowInfo|. All values will be copied internally and the actual window will
// be created on the UI thread. If |request_context| is NULL the global request
// context will be used. This function can be called on any browser process
// thread and will not block. The optional |extra_info| parameter provides an
// opportunity to specify extra information specific to the created browser that
// will be passed to cef_render_process_handler_t::on_browser_created() in the
// render process.
///
CEF_EXPORT int cef_browser_host_create_browser(
    const cef_window_info_t* windowInfo,
    struct _cef_client_t* client,
    const cef_string_t* url,
    const struct _cef_browser_settings_t* settings,
    struct _cef_dictionary_value_t* extra_info,
    struct _cef_request_context_t* request_context);

///
// Create a new browser window using the window parameters specified by
// |windowInfo|. If |request_context| is NULL the global request context will be
// used. This function can only be called on the browser process UI thread. The
// optional |extra_info| parameter provides an opportunity to specify extra
// information specific to the created browser that will be passed to
// cef_render_process_handler_t::on_browser_created() in the render process.
///
CEF_EXPORT cef_browser_t* cef_browser_host_create_browser_sync(
    const cef_window_info_t* windowInfo,
    struct _cef_client_t* client,
    const cef_string_t* url,
    const struct _cef_browser_settings_t* settings,
    struct _cef_dictionary_value_t* extra_info,
    struct _cef_request_context_t* request_context);

#ifdef __cplusplus
}
#endif

#endif  // CEF_INCLUDE_CAPI_CEF_BROWSER_CAPI_H_