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// Copyright 2014 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_WEB_CONTENTS_AURA_GESTURE_NAV_SIMPLE_H_
#define CONTENT_BROWSER_WEB_CONTENTS_AURA_GESTURE_NAV_SIMPLE_H_
#include <memory>
#include "base/memory/raw_ptr.h"
#include "content/browser/renderer_host/overscroll_controller_delegate.h"
#include "content/common/content_export.h"
namespace content {
class Affordance;
class WebContentsImpl;
// A simple delegate for the overscroll controller that paints an arrow on top
// of the web-contents as a hint for pending navigations from overscroll.
class CONTENT_EXPORT GestureNavSimple : public OverscrollControllerDelegate {
public:
explicit GestureNavSimple(WebContentsImpl* web_contents);
GestureNavSimple(const GestureNavSimple&) = delete;
GestureNavSimple& operator=(const GestureNavSimple&) = delete;
~GestureNavSimple() override;
// Called by the affordance when its complete/abort animation is finished so
// that the affordance instance can be destroyed.
void OnAffordanceAnimationEnded();
private:
friend class GestureNavSimpleTest;
// OverscrollControllerDelegate:
gfx::Size GetDisplaySize() const override;
bool OnOverscrollUpdate(float delta_x, float delta_y) override;
void OnOverscrollComplete(OverscrollMode overscroll_mode) override;
void OnOverscrollModeChange(OverscrollMode old_mode,
OverscrollMode new_mode,
OverscrollSource source,
cc::OverscrollBehavior behavior) override;
std::optional<float> GetMaxOverscrollDelta() const override;
raw_ptr<WebContentsImpl> web_contents_ = nullptr;
OverscrollMode mode_ = OVERSCROLL_NONE;
OverscrollSource source_ = OverscrollSource::NONE;
std::unique_ptr<Affordance> affordance_;
float completion_threshold_ = 0.f;
// When an overscroll is active, represents the maximum overscroll delta we
// expect in OnOverscrollUpdate().
float max_delta_ = 0.f;
};
} // namespace content
#endif // CONTENT_BROWSER_WEB_CONTENTS_AURA_GESTURE_NAV_SIMPLE_H_
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