cef/include/capi/cef_frame_handler_capi.h

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// Copyright (c) 2024 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
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// ---------------------------------------------------------------------------
//
// 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.
//
// $hash=fc6fbee765ce2b649f5293c8c4b076d36014e4aa$
//
#ifndef CEF_INCLUDE_CAPI_CEF_FRAME_HANDLER_CAPI_H_
#define CEF_INCLUDE_CAPI_CEF_FRAME_HANDLER_CAPI_H_
#pragma once
#include "include/capi/cef_base_capi.h"
#include "include/capi/cef_browser_capi.h"
#include "include/capi/cef_frame_capi.h"
#ifdef __cplusplus
extern "C" {
#endif
///
/// Implement this structure to handle events related to cef_frame_t life span.
/// The order of callbacks is:
///
/// (1) During initial cef_browser_host_t creation and navigation of the main
/// frame:
/// - cef_frame_handler_t::OnFrameCreated => The initial main frame object has
/// been created. Any commands will be queued until the frame is attached.
/// - cef_frame_handler_t::OnMainFrameChanged => The initial main frame object
/// has been assigned to the browser.
/// - cef_life_span_handler_t::OnAfterCreated => The browser is now valid and
/// can be used.
/// - cef_frame_handler_t::OnFrameAttached => The initial main frame object is
/// now connected to its peer in the renderer process. Commands can be routed.
///
/// (2) During further cef_browser_host_t navigation/loading of the main frame
/// and/or sub-frames:
/// - cef_frame_handler_t::OnFrameCreated => A new main frame or sub-frame
/// object has been created. Any commands will be queued until the frame is
/// attached.
/// - cef_frame_handler_t::OnFrameAttached => A new main frame or sub-frame
/// object is now connected to its peer in the renderer process. Commands can
/// be routed.
/// - cef_frame_handler_t::OnFrameDetached => An existing main frame or sub-
/// frame object has lost its connection to the renderer process. If multiple
/// objects are detached at the same time then notifications will be sent for
/// any sub-frame objects before the main frame object. Commands can no longer
/// be routed and will be discarded.
/// - cef_frame_handler_t::OnMainFrameChanged => A new main frame object has
/// been assigned to the browser. This will only occur with cross-origin
/// navigation or re-navigation after renderer process termination (due to
/// crashes, etc).
///
/// (3) During final cef_browser_host_t destruction of the main frame:
/// - cef_frame_handler_t::OnFrameDetached => Any sub-frame objects have lost
/// their connection to the renderer process. Commands can no longer be routed
/// and will be discarded.
/// - cef_life_span_handler_t::OnBeforeClose => The browser has been destroyed.
/// - cef_frame_handler_t::OnFrameDetached => The main frame object have lost
/// its connection to the renderer process. Notifications will be sent for any
/// sub-frame objects before the main frame object. Commands can no longer be
/// routed and will be discarded.
/// - cef_frame_handler_t::OnMainFrameChanged => The final main frame object has
/// been removed from the browser.
///
/// Cross-origin navigation and/or loading receives special handling.
///
/// When the main frame navigates to a different origin the OnMainFrameChanged
/// callback (2) will be executed with the old and new main frame objects.
///
/// When a new sub-frame is loaded in, or an existing sub-frame is navigated to,
/// a different origin from the parent frame, a temporary sub-frame object will
/// first be created in the parent's renderer process. That temporary sub-frame
/// will then be discarded after the real cross-origin sub-frame is created in
/// the new/target renderer process. The client will receive cross-origin
/// navigation callbacks (2) for the transition from the temporary sub-frame to
/// the real sub-frame. The temporary sub-frame will not receive or execute
/// commands during this transitional period (any sent commands will be
/// discarded).
///
/// When a new popup browser is created in a different origin from the parent
/// browser, a temporary main frame object for the popup will first be created
/// in the parent's renderer process. That temporary main frame will then be
/// discarded after the real cross-origin main frame is created in the
/// new/target renderer process. The client will receive creation and initial
/// navigation callbacks (1) for the temporary main frame, followed by cross-
/// origin navigation callbacks (2) for the transition from the temporary main
/// frame to the real main frame. The temporary main frame may receive and
/// execute commands during this transitional period (any sent commands may be
/// executed, but the behavior is potentially undesirable since they execute in
/// the parent browser's renderer process and not the new/target renderer
/// process).
///
/// Callbacks will not be executed for placeholders that may be created during
/// pre-commit navigation for sub-frames that do not yet exist in the renderer
/// process. Placeholders will have cef_frame_t::get_identifier() == -4.
///
/// The functions of this structure will be called on the UI thread unless
/// otherwise indicated.
///
typedef struct _cef_frame_handler_t {
///
/// Base structure.
///
cef_base_ref_counted_t base;
///
/// Called when a new frame is created. This will be the first notification
/// that references |frame|. Any commands that require transport to the
/// associated renderer process (LoadRequest, SendProcessMessage, GetSource,
/// etc.) will be queued until OnFrameAttached is called for |frame|.
///
void(CEF_CALLBACK* on_frame_created)(struct _cef_frame_handler_t* self,
struct _cef_browser_t* browser,
struct _cef_frame_t* frame);
///
/// Called when a frame can begin routing commands to/from the associated
/// renderer process. |reattached| will be true (1) if the frame was re-
/// attached after exiting the BackForwardCache. Any commands that were queued
/// have now been dispatched.
///
void(CEF_CALLBACK* on_frame_attached)(struct _cef_frame_handler_t* self,
struct _cef_browser_t* browser,
Fix draggable region update with BackForwardCache enabled (see issue #2421) When BackForwardCache is enabled and the user navigates the main frame back/forward a new RFH may be created for an existing main frame GlobalId value and CefFrameHostImpl (e.g. an object that was previously Detach()ed after main frame navigation called SetMainFrame, but for which RenderFrameDeleted was not subsequently called due to insertion in the BackForwardCache). In this case we can re-attach the new RFH to the existing main frame CefFrameHostImpl in RenderFrameHostStateChanged and resume processing of messages. Swapping back/forward to an existing (already loaded) renderer does not trigger new notifications for draggable regions (e.g. RenderFrameObserver:: DraggableRegionsChanged is not called by default). We therefore explicitly request an update of draggable regions by sending the DidStopLoading message to the renderer. A new |reattached| parameter is added to CefFrameHandler::OnFrameAttached to support identification of BackForwardCache usage by the client. To test with unit tests: Run `ceftests --gtest_filter=DraggableRegionsTest.DraggableRegionsCrossOrigin --enable-features=BackForwardCache` To test manually: 1. Run `cefclient --enable-features=BackForwardCache --use-views --url=http://tests/draggable`, note that draggable regions work. 2. Load https://www.google.com via the address bar, note that draggable regions are removed. 3. Go back to http://tests/draggable, note that draggable regions work. 4. Go forward to https://www.google.com, note that draggable regions are removed.
2021-09-15 13:40:08 +02:00
struct _cef_frame_t* frame,
int reattached);
///
/// Called when a frame loses its connection to the renderer process and will
/// be destroyed. Any pending or future commands will be discarded and
/// cef_frame_t::is_valid() will now return false (0) for |frame|. If called
/// after cef_life_span_handler_t::on_before_close() during browser
/// destruction then cef_browser_t::is_valid() will return false (0) for
/// |browser|.
///
void(CEF_CALLBACK* on_frame_detached)(struct _cef_frame_handler_t* self,
struct _cef_browser_t* browser,
struct _cef_frame_t* frame);
///
/// Called when the main frame changes due to (a) initial browser creation,
/// (b) final browser destruction, (c) cross-origin navigation or (d) re-
/// navigation after renderer process termination (due to crashes, etc).
/// |old_frame| will be NULL and |new_frame| will be non-NULL when a main
/// frame is assigned to |browser| for the first time. |old_frame| will be
/// non-NULL and |new_frame| will be NULL and when a main frame is removed
/// from |browser| for the last time. Both |old_frame| and |new_frame| will be
/// non-NULL for cross-origin navigations or re-navigation after renderer
/// process termination. This function will be called after on_frame_created()
/// for |new_frame| and/or after on_frame_detached() for |old_frame|. If
/// called after cef_life_span_handler_t::on_before_close() during browser
/// destruction then cef_browser_t::is_valid() will return false (0) for
/// |browser|.
///
void(CEF_CALLBACK* on_main_frame_changed)(struct _cef_frame_handler_t* self,
struct _cef_browser_t* browser,
struct _cef_frame_t* old_frame,
struct _cef_frame_t* new_frame);
} cef_frame_handler_t;
#ifdef __cplusplus
}
#endif
#endif // CEF_INCLUDE_CAPI_CEF_FRAME_HANDLER_CAPI_H_