// Copyright (c) 2024 Marshall A. Greenblatt. 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See the translator.README.txt file in the tools directory for // more information. // // $hash=5f2f1d43cf93b10ba58b2aa2716bc3638e58c97c$ // #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 on the UI thread before a new DevTools popup browser is created. /// The |browser| value represents the source of the popup request. Optionally /// modify |windowInfo|, |client|, |settings| and |extra_info| values. The /// |client|, |settings| and |extra_info| values will default to the source /// browser's values. Any modifications to |windowInfo| will be ignored if the /// parent browser is Views-hosted (wrapped in a cef_browser_view_t). /// /// 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. /// The existing |extra_info| object, if any, will be read-only but may be /// replaced with a new object. /// /// Views-hosted source browsers will create Views-hosted DevTools popups /// unless |use_default_window| is set to to true (1). DevTools popups can be /// blocked by returning true (1) from cef_command_handler_t::OnChromeCommand /// for IDC_DEV_TOOLS. Only used with the Chrome runtime. /// void(CEF_CALLBACK* on_before_dev_tools_popup)( struct _cef_life_span_handler_t* self, struct _cef_browser_t* browser, 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* use_default_window); /// /// 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_