cef/include/capi/cef_life_span_handler_capi.h

226 lines
11 KiB
C

// Copyright (c) 2023 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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// 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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//
// ---------------------------------------------------------------------------
//
// 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.
//
// $hash=1c807597b96889f44a1e5199e860e8db4948b473$
//
#ifndef CEF_INCLUDE_CAPI_CEF_LIFE_SPAN_HANDLER_CAPI_H_
#define CEF_INCLUDE_CAPI_CEF_LIFE_SPAN_HANDLER_CAPI_H_
#pragma once
#include "include/capi/cef_base_capi.h"
#include "include/capi/cef_browser_capi.h"
#ifdef __cplusplus
extern "C" {
#endif
struct _cef_client_t;
///
/// Implement this structure to handle events related to browser life span. The
/// functions of this structure will be called on the UI thread unless otherwise
/// indicated.
///
typedef struct _cef_life_span_handler_t {
///
/// Base structure.
///
cef_base_ref_counted_t base;
///
/// Called on the UI thread before a new popup browser is created. The
/// |browser| and |frame| values represent the source of the popup request.
/// The |target_url| and |target_frame_name| values indicate where the popup
/// browser should navigate and may be NULL if not specified with the request.
/// The |target_disposition| value indicates where the user intended to open
/// the popup (e.g. current tab, new tab, etc). The |user_gesture| value will
/// be true (1) if the popup was opened via explicit user gesture (e.g.
/// clicking a link) or false (0) if the popup opened automatically (e.g. via
/// the DomContentLoaded event). The |popupFeatures| structure contains
/// additional information about the requested popup window. To allow creation
/// of the popup browser optionally modify |windowInfo|, |client|, |settings|
/// and |no_javascript_access| and return false (0). To cancel creation of the
/// popup browser return true (1). The |client| and |settings| values will
/// default to the source browser's values. If the |no_javascript_access|
/// value is set to false (0) the new browser will not be scriptable and may
/// not be hosted in the same renderer process as the source browser. Any
/// modifications to |windowInfo| will be ignored if the parent browser is
/// wrapped in a cef_browser_view_t. Popup browser creation will be canceled
/// if the parent browser is destroyed before the popup browser creation
/// completes (indicated by a call to OnAfterCreated for the popup browser).
/// The |extra_info| parameter provides an opportunity to specify extra
/// information specific to the created popup browser that will be passed to
/// cef_render_process_handler_t::on_browser_created() in the render process.
///
int(CEF_CALLBACK* on_before_popup)(
struct _cef_life_span_handler_t* self,
struct _cef_browser_t* browser,
struct _cef_frame_t* frame,
const cef_string_t* target_url,
const cef_string_t* target_frame_name,
cef_window_open_disposition_t target_disposition,
int user_gesture,
const cef_popup_features_t* popupFeatures,
struct _cef_window_info_t* windowInfo,
struct _cef_client_t** client,
struct _cef_browser_settings_t* settings,
struct _cef_dictionary_value_t** extra_info,
int* no_javascript_access);
///
/// Called after a new browser is created. It is now safe to begin performing
/// actions with |browser|. cef_frame_handler_t callbacks related to initial
/// main frame creation will arrive before this callback. See
/// cef_frame_handler_t documentation for additional usage information.
///
void(CEF_CALLBACK* on_after_created)(struct _cef_life_span_handler_t* self,
struct _cef_browser_t* browser);
///
/// Called when a browser has recieved a request to close. This may result
/// directly from a call to cef_browser_host_t::*close_browser() or indirectly
/// if the browser is parented to a top-level window created by CEF and the
/// user attempts to close that window (by clicking the 'X', for example). The
/// do_close() function will be called after the JavaScript 'onunload' event
/// has been fired.
///
/// An application should handle top-level owner window close notifications by
/// calling cef_browser_host_t::try_close_browser() or
/// cef_browser_host_t::CloseBrowser(false (0)) instead of allowing the window
/// to close immediately (see the examples below). This gives CEF an
/// opportunity to process the 'onbeforeunload' event and optionally cancel
/// the close before do_close() is called.
///
/// When windowed rendering is enabled CEF will internally create a window or
/// view to host the browser. In that case returning false (0) from do_close()
/// will send the standard close notification to the browser's top-level owner
/// window (e.g. WM_CLOSE on Windows, performClose: on OS X, "delete_event" on
/// Linux or cef_window_delegate_t::can_close() callback from Views). If the
/// browser's host window/view has already been destroyed (via view hierarchy
/// tear-down, for example) then do_close() will not be called for that
/// browser since is no longer possible to cancel the close.
///
/// When windowed rendering is disabled returning false (0) from do_close()
/// will cause the browser object to be destroyed immediately.
///
/// If the browser's top-level owner window requires a non-standard close
/// notification then send that notification from do_close() and return true
/// (1).
///
/// The cef_life_span_handler_t::on_before_close() function will be called
/// after do_close() (if do_close() is called) and immediately before the
/// browser object is destroyed. The application should only exit after
/// on_before_close() has been called for all existing browsers.
///
/// The below examples describe what should happen during window close when
/// the browser is parented to an application-provided top-level window.
///
/// Example 1: Using cef_browser_host_t::try_close_browser(). This is
/// recommended for clients using standard close handling and windows created
/// on the browser process UI thread. 1. User clicks the window close button
/// which sends a close notification
/// to the application's top-level window.
/// 2. Application's top-level window receives the close notification and
/// calls TryCloseBrowser() (which internally calls CloseBrowser(false)).
/// TryCloseBrowser() returns false so the client cancels the window
/// close.
/// 3. JavaScript 'onbeforeunload' handler executes and shows the close
/// confirmation dialog (which can be overridden via
/// CefJSDialogHandler::OnBeforeUnloadDialog()).
/// 4. User approves the close. 5. JavaScript 'onunload' handler executes.
/// 6. CEF sends a close notification to the application's top-level window
/// (because DoClose() returned false by default).
/// 7. Application's top-level window receives the close notification and
/// calls TryCloseBrowser(). TryCloseBrowser() returns true so the client
/// allows the window close.
/// 8. Application's top-level window is destroyed. 9. Application's
/// on_before_close() handler is called and the browser object
/// is destroyed.
/// 10. Application exits by calling cef_quit_message_loop() if no other
/// browsers
/// exist.
///
/// Example 2: Using cef_browser_host_t::CloseBrowser(false (0)) and
/// implementing the do_close() callback. This is recommended for clients
/// using non-standard close handling or windows that were not created on the
/// browser process UI thread. 1. User clicks the window close button which
/// sends a close notification
/// to the application's top-level window.
/// 2. Application's top-level window receives the close notification and:
/// A. Calls CefBrowserHost::CloseBrowser(false).
/// B. Cancels the window close.
/// 3. JavaScript 'onbeforeunload' handler executes and shows the close
/// confirmation dialog (which can be overridden via
/// CefJSDialogHandler::OnBeforeUnloadDialog()).
/// 4. User approves the close. 5. JavaScript 'onunload' handler executes.
/// 6. Application's do_close() handler is called. Application will:
/// A. Set a flag to indicate that the next close attempt will be allowed.
/// B. Return false.
/// 7. CEF sends an close notification to the application's top-level window.
/// 8. Application's top-level window receives the close notification and
/// allows the window to close based on the flag from #6B.
/// 9. Application's top-level window is destroyed. 10. Application's
/// on_before_close() handler is called and the browser object
/// is destroyed.
/// 11. Application exits by calling cef_quit_message_loop() if no other
/// browsers
/// exist.
///
int(CEF_CALLBACK* do_close)(struct _cef_life_span_handler_t* self,
struct _cef_browser_t* browser);
///
/// Called just before a browser is destroyed. Release all references to the
/// browser object and do not attempt to execute any functions on the browser
/// object (other than IsValid, GetIdentifier or IsSame) after this callback
/// returns. cef_frame_handler_t callbacks related to final main frame
/// destruction will arrive after this callback and cef_browser_t::IsValid
/// will return false (0) at that time. Any in-progress network requests
/// associated with |browser| will be aborted when the browser is destroyed,
/// and cef_resource_request_handler_t callbacks related to those requests may
/// still arrive on the IO thread after this callback. See cef_frame_handler_t
/// and do_close() documentation for additional usage information.
///
void(CEF_CALLBACK* on_before_close)(struct _cef_life_span_handler_t* self,
struct _cef_browser_t* browser);
} cef_life_span_handler_t;
#ifdef __cplusplus
}
#endif
#endif // CEF_INCLUDE_CAPI_CEF_LIFE_SPAN_HANDLER_CAPI_H_