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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_GUEST_CONTENTS_BROWSER_GUEST_CONTENTS_HANDLE_H_
#define COMPONENTS_GUEST_CONTENTS_BROWSER_GUEST_CONTENTS_HANDLE_H_
#include "base/sequence_checker.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_observer.h"
#include "content/public/browser/web_contents_user_data.h"
namespace guest_contents {
using GuestId = int;
// A handle for a guest WebContents, uniquely identified by a GuestId. It
// provides APIs for attaching and detaching the guest WebContents from the
// outer WebContents. It has the same lifetime as the guest WebContents.
class GuestContentsHandle
: public content::WebContentsUserData<GuestContentsHandle>,
public content::WebContentsObserver {
public:
~GuestContentsHandle() override;
// Creates a handle for the given `web_contents`.
static GuestContentsHandle* CreateForWebContents(
content::WebContents* web_contents);
static GuestContentsHandle* FromID(GuestId id);
// Returns the unique ID of this guest. This ID is automatically assigned
// when the GuestContentsHandle is created.
GuestId id() { return id_; }
void AttachToOuterWebContents(
content::RenderFrameHost* outer_delegate_frame);
void DetachFromOuterWebContents();
private:
friend content::WebContentsUserData<GuestContentsHandle>;
WEB_CONTENTS_USER_DATA_KEY_DECL();
explicit GuestContentsHandle(content::WebContents* web_contents);
// content::WebContentsObserver:
void WebContentsDestroyed() override;
GuestId GetNextId();
GuestId id_;
SEQUENCE_CHECKER(sequence_checker_);
};
} // namespace guest_contents
#endif // COMPONENTS_GUEST_CONTENTS_BROWSER_GUEST_CONTENTS_HANDLE_H_
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