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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.
#include "components/guest_contents/renderer/swap_render_frame.h"
#include <memory>
#include "base/functional/bind.h"
#include "base/logging.h"
#include "base/supports_user_data.h"
#include "components/guest_contents/common/guest_contents.mojom.h"
#include "content/public/renderer/render_frame.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "third_party/blink/public/platform/browser_interface_broker_proxy.h"
#include "third_party/blink/public/web/web_local_frame.h"
namespace guest_contents::renderer {
namespace {
const void* const kGuestContentsServiceKey = &kGuestContentsServiceKey;
// A service that holds a connection to the GuestContentsHost in the browser
// process. This service is available on the main frame.
class GuestContentsService : public base::SupportsUserData::Data {
public:
explicit GuestContentsService(content::RenderFrame* render_frame) {
// GuestContentsHost is available on the WebUIController owned by the main
// frame.
CHECK(render_frame->IsMainFrame());
render_frame->GetBrowserInterfaceBroker().GetInterface(
remote_.BindNewPipeAndPassReceiver());
}
static GuestContentsService* GetOrCreateForRenderFrame(
content::RenderFrame* render_frame) {
if (!render_frame->GetUserData(kGuestContentsServiceKey)) {
render_frame->SetUserData(
kGuestContentsServiceKey,
std::make_unique<GuestContentsService>(render_frame));
}
return static_cast<GuestContentsService*>(
render_frame->GetUserData(kGuestContentsServiceKey));
}
mojo::Remote<mojom::GuestContentsHost>& remote() { return remote_; }
private:
mojo::Remote<mojom::GuestContentsHost> remote_;
};
} // namespace
void SwapRenderFrame(content::RenderFrame* render_frame,
int guest_contents_id) {
// `render_frame` is the outer delegate frame. It must be in the same process
// as the main frame. If not this CHECK will fail.
CHECK(render_frame->GetMainRenderFrame());
GuestContentsService::GetOrCreateForRenderFrame(
render_frame->GetMainRenderFrame())
->remote()
->Attach(render_frame->GetWebFrame()->GetLocalFrameToken(),
guest_contents_id,
base::BindOnce([](bool success) { CHECK(success); }));
}
} // namespace guest_contents::renderer
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