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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_ASH_BACK_GESTURE_BACK_GESTURE_CONTEXTUAL_NUDGE_DELEGATE_H_
#define CHROME_BROWSER_UI_ASH_BACK_GESTURE_BACK_GESTURE_CONTEXTUAL_NUDGE_DELEGATE_H_
#include "ash/public/cpp/back_gesture_contextual_nudge_delegate.h"
#include "base/memory/raw_ptr.h"
#include "chrome/browser/ui/tabs/tab_strip_model_observer.h"
#include "content/public/browser/web_contents_observer.h"
#include "ui/aura/window_observer.h"
namespace aura {
class Window;
}
namespace ash {
class BackGestureContextualNudgeController;
}
// BackGestureContextualNudgeDelegate observes |window_|'s active webcontent and
// notify when |window_|'s navigation status changes (either the active
// webcontent changed or a navigation happens in the active webcontent.).
class BackGestureContextualNudgeDelegate
: public ash::BackGestureContextualNudgeDelegate,
public content::WebContentsObserver,
public TabStripModelObserver,
public aura::WindowObserver {
public:
explicit BackGestureContextualNudgeDelegate(
ash::BackGestureContextualNudgeController* controller);
BackGestureContextualNudgeDelegate(
const BackGestureContextualNudgeDelegate&) = delete;
BackGestureContextualNudgeDelegate& operator=(
const BackGestureContextualNudgeDelegate&) = delete;
~BackGestureContextualNudgeDelegate() override;
// ash::BackGestureContextualNudgeDelegate:
void MaybeStartTrackingNavigation(aura::Window* window) override;
// content::WebContentsObserver:
void DidFinishNavigation(
content::NavigationHandle* navigation_handle) override;
// TabStripModelObserver:
void OnTabStripModelChanged(
TabStripModel* tab_strip_model,
const TabStripModelChange& change,
const TabStripSelectionChange& selection) override;
// aura::WindowObserver:
void OnWindowDestroying(aura::Window* window) override;
private:
// Stop tracking the navigation status for |window_|.
void StopTrackingNavigation();
raw_ptr<aura::Window> window_ = nullptr; // Current observed window.
const raw_ptr<ash::BackGestureContextualNudgeController>
controller_; // Not owned.
};
#endif // CHROME_BROWSER_UI_ASH_BACK_GESTURE_BACK_GESTURE_CONTEXTUAL_NUDGE_DELEGATE_H_
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