chromium/components/subresource_filter/content/shared/browser/activation_state_computing_navigation_throttle.h

// Copyright 2017 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_SUBRESOURCE_FILTER_CONTENT_SHARED_BROWSER_ACTIVATION_STATE_COMPUTING_NAVIGATION_THROTTLE_H_
#define COMPONENTS_SUBRESOURCE_FILTER_CONTENT_SHARED_BROWSER_ACTIVATION_STATE_COMPUTING_NAVIGATION_THROTTLE_H_

#include <memory>
#include <optional>

#include "base/memory/weak_ptr.h"
#include "components/subresource_filter/core/browser/verified_ruleset_dealer.h"
#include "components/subresource_filter/core/mojom/subresource_filter.mojom.h"
#include "content/public/browser/navigation_throttle.h"

namespace subresource_filter {

class AsyncDocumentSubresourceFilter;

// NavigationThrottle responsible for determining the activation state of
// subresource filtering for a given navigation (either in the root frame or in
// a child frame); and for deferring that navigation at WillProcessResponse
// until the activation state computation on the ruleset's task runner is
// complete.
//
// Interested parties can retrieve the activation state after this point (most
// likely in ReadyToCommitNavigation).
//
// Note: for performance, activation computation for child frames is done
// speculatively at navigation start and at every redirect. This is to reduce
// the wait time (most likely to 0) by WillProcessResponse time. For main
// frames, speculation will be done at the next navigation stage after
// NotifyPageActivationWithRuleset is called.
class ActivationStateComputingNavigationThrottle
    : public content::NavigationThrottle { … };

}  // namespace subresource_filter

#endif  // COMPONENTS_SUBRESOURCE_FILTER_CONTENT_SHARED_BROWSER_ACTIVATION_STATE_COMPUTING_NAVIGATION_THROTTLE_H_