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// Copyright 2021 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_SUBFRAME_NAVIGATION_THROTTLE_H_
#define CONTENT_BROWSER_PRELOADING_PRERENDER_PRERENDER_SUBFRAME_NAVIGATION_THROTTLE_H_
#include "base/scoped_observation.h"
#include "content/browser/preloading/prerender/prerender_final_status.h"
#include "content/browser/preloading/prerender/prerender_host.h"
#include "content/public/browser/navigation_throttle.h"
#include "content/public/browser/web_contents_observer.h"
namespace content {
class FrameTreeNode;
// PrerenderSubframeNavigationThrottle defers cross-origin subframe loading
// during the main frame is in a prerendered state.
class PrerenderSubframeNavigationThrottle : public NavigationThrottle,
public PrerenderHost::Observer,
public WebContentsObserver {
public:
~PrerenderSubframeNavigationThrottle() override;
static std::unique_ptr<PrerenderSubframeNavigationThrottle>
MaybeCreateThrottleFor(NavigationHandle* navigation_handle);
private:
explicit PrerenderSubframeNavigationThrottle(
NavigationHandle* navigation_handle);
// NavigationThrottle
const char* GetNameForLogging() override;
ThrottleCheckResult WillStartRequest() override;
ThrottleCheckResult WillRedirectRequest() override;
ThrottleCheckResult WillProcessResponse() override;
ThrottleCheckResult WillCommitWithoutUrlLoader() override;
// PrerenderHost::Observer
void OnActivated() override;
void OnHostDestroyed(PrerenderFinalStatus final_status) override;
// WebContentsObserver:
void DidFinishNavigation(NavigationHandle* nav_handle) override;
ThrottleCheckResult WillStartOrRedirectRequest();
// Called when this throttle defers a navigation. Observes the PrerenderHost
// so that the throttle can resume the navigation upon activation, and returns
// ThrottleCheckResult::DEFER. If it's not feasible to defer it, returns
// Throttlecheckresult::CANCEL.
ThrottleCheckResult DeferOrCancelCrossOriginSubframeNavigation(
const FrameTreeNode& frame_tree_node);
bool is_deferred_ = false;
const FrameTreeNodeId prerender_root_ftn_id_;
base::ScopedObservation<PrerenderHost, PrerenderHost::Observer> observation_{
this};
};
} // namespace content
#endif // CONTENT_BROWSER_PRELOADING_PRERENDER_PRERENDER_SUBFRAME_NAVIGATION_THROTTLE_H_
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