html_fenced_frame_element.h | Explore in Territory

// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_HTML_FENCED_FRAME_HTML_FENCED_FRAME_ELEMENT_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_HTML_FENCED_FRAME_HTML_FENCED_FRAME_ELEMENT_H_

#include "base/gtest_prod_util.h"
#include "base/notreached.h"
#include "third_party/blink/public/common/fenced_frame/fenced_frame_utils.h"
#include "third_party/blink/public/mojom/fenced_frame/fenced_frame.mojom-blink.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/dom/events/event_target.h"
#include "third_party/blink/renderer/core/dom/node.h"
#include "third_party/blink/renderer/core/html/fenced_frame/fenced_frame_config.h"
#include "third_party/blink/renderer/core/html/html_frame_owner_element.h"
#include "third_party/blink/renderer/core/html/html_iframe_element_sandbox.h"
#include "third_party/blink/renderer/core/resize_observer/resize_observer.h"
#include "third_party/blink/renderer/platform/mojo/heap_mojo_associated_remote.h"
#include "third_party/blink/renderer/platform/wtf/casting.h"

namespace blink {

class KURL;

// HTMLFencedFrameElement implements the <fencedframe> element, which hosts the
// main frame of a top-level browsing context in an isolated frame. This element
// is non-standard and is currently being developed in
// https://github.com/shivanigithub/fenced-frame. As a result, this element is
// not exposed by default, but can be enabled by one of the following:
// - Enabling the Fenced Frames about:flags entry
// - Passing --enable-features=FencedFrames
class CORE_EXPORT HTMLFencedFrameElement : public HTMLFrameOwnerElement { … };

// Type casting. Custom since adoption could lead to an HTMLFencedFrameElement
// ending up in a document that doesn't have the Fenced Frame origin trial
// enabled, which would result in creation of an HTMLUnknownElement with the
// "fencedframe" tag name. We can't support casting those elements to
// HTMLFencedFrameElements because they are not fenced frame elements.
// TODO(crbug.com/1123606): Remove these custom helpers when the origin trial is
// over.
template <>
struct DowncastTraits<HTMLFencedFrameElement> { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_HTML_FENCED_FRAME_HTML_FENCED_FRAME_ELEMENT_H_
chromium/third_party/blink/renderer/core/html/fenced_frame/html_fenced_frame_element.h
