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// Copyright 2020 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_PRERENDER_PRERENDER_HOST_H_
#define CONTENT_BROWSER_PRERENDER_PRERENDER_HOST_H_
#include <memory>
#include "content/common/content_export.h"
#include "content/public/browser/global_routing_id.h"
#include "content/public/browser/web_contents_observer.h"
#include "third_party/blink/public/mojom/prerender/prerender.mojom.h"
#include "url/gurl.h"
namespace content {
class RenderFrameHostImpl;
class WebContents;
// Prerender2:
// PrerenderHost creates a new WebContents and starts prerendering with that.
// Then navigation code is expected to find this host from PrerenderHostRegistry
// and activate the prerendered WebContents upon navigation. This is created per
// request from a renderer process via PrerenderProcessor or will directly be
// created for browser-initiated prerendering (this code path is not implemented
// yet). This is owned by PrerenderHostRegistry.
//
// TODO(https://crbug.com/1132746): Stop creating a new WebContents and instead
// use the MPArch.
class CONTENT_EXPORT PrerenderHost final : public WebContentsObserver {
public:
PrerenderHost(blink::mojom::PrerenderAttributesPtr attributes,
const GlobalFrameRoutingId& initiator_render_frame_host_id,
const url::Origin& initiator_origin);
~PrerenderHost() override;
PrerenderHost(const PrerenderHost&) = delete;
PrerenderHost& operator=(const PrerenderHost&) = delete;
PrerenderHost(PrerenderHost&&) = delete;
PrerenderHost& operator=(PrerenderHost&&) = delete;
void StartPrerendering();
// WebContentsObserver implementation:
void DidFinishNavigation(NavigationHandle* navigation_handle) override;
// Activates the prerendered contents. Returns false when activation didn't
// occur for some reason. This must be called after this host gets ready for
// activation.
bool ActivatePrerenderedContents(
RenderFrameHostImpl& current_render_frame_host);
bool is_ready_for_activation() const { return is_ready_for_activation_; }
private:
const blink::mojom::PrerenderAttributesPtr attributes_;
const GlobalFrameRoutingId initiator_render_frame_host_id_;
const url::Origin initiator_origin_;
// WebContents for prerendering.
// TODO(https://crbug.com/1132746): Stop owning a new WebContents and instead
// use the new MPArch mechanism.
std::unique_ptr<WebContents> prerendered_contents_;
// Indicates if `prerendered_contents_` is ready for activation.
bool is_ready_for_activation_ = false;
};
} // namespace content
#endif // CONTENT_BROWSER_PRERENDER_PRERENDER_HOST_H_
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