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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.
#ifndef CHROME_BROWSER_ACTOR_TOOLS_OBSERVATION_DELAY_CONTROLLER_H_
#define CHROME_BROWSER_ACTOR_TOOLS_OBSERVATION_DELAY_CONTROLLER_H_
#include "base/functional/callback_forward.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/actor/aggregated_journal.h"
#include "content/public/browser/navigation_handle.h"
#include "content/public/browser/web_contents_observer.h"
namespace content {
class RenderFrameHost;
} // namespace content
namespace actor {
// Observes a page during tool-use and determines when the page has settled
// after an action and is ready for for an observation.
//
// This class will watch for any document loads in the web contents. When the
// tool completes, this class delays until the load also finishes and then a new
// frame is generated and presented.
class ObservationDelayController : public content::WebContentsObserver {
public:
using ReadyCallback = base::OnceClosure;
explicit ObservationDelayController(content::RenderFrameHost& target_frame);
~ObservationDelayController() override;
// Note: Callback will always be executed asynchronously. It may be run after
// this object is deleted so must manage its own lifetime.
void Wait(AggregatedJournal::PendingAsyncEntry& parent_journal_entry,
ReadyCallback callback);
// content::WebContentsObserver
void DidStartLoading() override;
void DidStopLoading() override;
private:
void WaitForVisualStateUpdate();
void VisualStateUpdated(bool success);
void Timeout();
enum class State {
kWaitingForLoadStart,
kWaitingForLoadStop,
kWaitingForVisualUpdate,
kDone
};
static std::string_view StateToString(State state);
State state_ = State::kWaitingForLoadStart;
ReadyCallback ready_callback_;
std::unique_ptr<AggregatedJournal::PendingAsyncEntry> journal_entry_;
base::WeakPtrFactory<ObservationDelayController> weak_ptr_factory_{this};
};
} // namespace actor
#endif // CHROME_BROWSER_ACTOR_TOOLS_OBSERVATION_DELAY_CONTROLLER_H_
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