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// 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 CHROME_BROWSER_UI_OMNIBOX_OMNIBOX_TAB_HELPER_H_
#define CHROME_BROWSER_UI_OMNIBOX_OMNIBOX_TAB_HELPER_H_
#include "base/observer_list.h"
#include "base/observer_list_types.h"
#include "components/omnibox/common/omnibox_focus_state.h"
#include "content/public/browser/web_contents_user_data.h"
namespace content {
class WebContents;
}
// Serves as a bridge between omnibox and NTP UIs. Allows registration of
// observers to listen for omnibox updates.
class OmniboxTabHelper : public content::WebContentsUserData<OmniboxTabHelper> {
public:
// Observer to listen for updates from OmniboxTabHelper.
class Observer : public base::CheckedObserver {
public:
// Invoked when the omnibox input state is changed.
virtual void OnOmniboxInputStateChanged() = 0;
// Called to indicate that the omnibox focus state changed with the given
// |reason|.
virtual void OnOmniboxFocusChanged(OmniboxFocusState state,
OmniboxFocusChangeReason reason) = 0;
};
~OmniboxTabHelper() override;
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
// Calls forwarded from omnibox. See OmniboxClient for details.
void OnInputStateChanged();
void OnFocusChanged(OmniboxFocusState state, OmniboxFocusChangeReason reason);
private:
explicit OmniboxTabHelper(content::WebContents* contents);
friend class content::WebContentsUserData<OmniboxTabHelper>;
WEB_CONTENTS_USER_DATA_KEY_DECL();
base::ObserverList<Observer> observers_;
};
#endif // CHROME_BROWSER_UI_OMNIBOX_OMNIBOX_TAB_HELPER_H_
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