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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_UI_OMNIBOX_OMNIBOX_POPUP_STATE_MANAGER_H_
#define CHROME_BROWSER_UI_OMNIBOX_OMNIBOX_POPUP_STATE_MANAGER_H_
#include "base/callback_list.h"
#include "base/functional/callback_forward.h"
// Represents the state of omnibox popup currently visible.
enum class OmniboxPopupState {
kNone, // No popup is visible
kClassic, // Classic popup is visible
kAim // AI Mode popup is visible
};
// Manages the visibility state of omnibox popups and notifies subscribers.
// This provides a single source of truth for popup state that is accessible
// from both the model layer and the view layer.
class OmniboxPopupStateManager {
public:
// Callback signature for popup state changes (old_state, new_state).
using PopupStateChangedCallback =
base::RepeatingCallback<void(OmniboxPopupState, OmniboxPopupState)>;
OmniboxPopupStateManager();
OmniboxPopupStateManager(const OmniboxPopupStateManager&) = delete;
OmniboxPopupStateManager& operator=(const OmniboxPopupStateManager&) = delete;
~OmniboxPopupStateManager();
// Returns the current popup state.
OmniboxPopupState popup_state() const { return popup_state_; }
// Sets the current popup state. Will notify subscribers if the state changes.
void SetPopupState(OmniboxPopupState new_state);
// Adds a callback that will be called when the popup state changes.
// The callback will be unregistered when the subscription is destroyed.
[[nodiscard]] base::CallbackListSubscription AddPopupStateChangedCallback(
PopupStateChangedCallback callback);
private:
OmniboxPopupState popup_state_ = OmniboxPopupState::kNone;
base::RepeatingCallbackList<void(OmniboxPopupState, OmniboxPopupState)>
popup_state_changed_callbacks_;
};
#endif // CHROME_BROWSER_UI_OMNIBOX_OMNIBOX_POPUP_STATE_MANAGER_H_
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