prerender_host_registry.h | Explore in Territory

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_BROWSER_PRELOADING_PRERENDER_PRERENDER_HOST_REGISTRY_H_
#define CONTENT_BROWSER_PRELOADING_PRERENDER_PRERENDER_HOST_REGISTRY_H_

#include <memory>
#include <set>
#include <string>
#include <vector>

#include "base/containers/circular_deque.h"
#include "base/containers/flat_map.h"
#include "base/memory/memory_pressure_listener.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/observer_list_types.h"
#include "base/timer/timer.h"
#include "base/types/pass_key.h"
#include "content/browser/preloading/preloading_confidence.h"
#include "content/browser/preloading/prerender/prerender_final_status.h"
#include "content/common/content_export.h"
#include "content/common/frame.mojom-forward.h"
#include "content/public/browser/preloading.h"
#include "content/public/browser/visibility.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_observer.h"
#include "third_party/blink/public/mojom/speculation_rules/speculation_rules.mojom-shared.h"

class GURL;

namespace base {
class SingleThreadTaskRunner;
}

namespace net {
class HttpResponseHeaders;
}

namespace network {
class SimpleURLLoader;
}  // namespace network

namespace content {

class FrameTree;
class NavigationRequest;
class PrerenderCancellationReason;
class PrerenderHost;
class PrerenderNewTabHandle;
class RenderFrameHostImpl;
class StoredPage;
struct PrerenderAttributes;

// PrerenderHostRegistry creates and retains a prerender host, and reserves it
// for NavigationRequest to activate the prerendered page. This is created per
// WebContentsImpl and owned by it.
//
// The APIs of this class are categorized into two: APIs for triggers and APIs
// for activators.
//
// - Triggers (e.g., SpeculationHostImpl) start prerendering by
//   CreateAndStartHost() and notify the registry of destruction of the trigger
//   by CancelHosts().
// - Activators (i.e., NavigationRequest) can reserve the prerender host on
//   activation start by ReserveHostToActivate(), activate it by
//   ActivateReservedHost(), and notify the registry of completion of the
//   activation by OnActivationFinished().
class CONTENT_EXPORT PrerenderHostRegistry : public WebContentsObserver { … };

}  // namespace content

#endif  // CONTENT_BROWSER_PRELOADING_PRERENDER_PRERENDER_HOST_REGISTRY_H_
chromium/content/browser/preloading/prerender/prerender_host_registry.h
