| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // 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/macros.h" |
| #include "content/browser/renderer_host/overscroll_controller_delegate.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 GestureNavSimple : public OverscrollControllerDelegate { |
| public: |
| explicit GestureNavSimple(WebContentsImpl* web_contents); |
| ~GestureNavSimple() override; |
| |
| // Called by the affordance when its complete/abort animation is finished so |
| // that the affordance instance can be destroyed. |
| void OnAffordanceAnimationEnded(); |
| |
| private: |
| // OverscrollControllerDelegate: |
| gfx::Size GetDisplaySize() const override; |
| void OnOverscrollBehaviorUpdate( |
| cc::OverscrollBehavior overscroll_behavior) 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) override; |
| base::Optional<float> GetMaxOverscrollDelta() const override; |
| |
| 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; |
| |
| DISALLOW_COPY_AND_ASSIGN(GestureNavSimple); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_BROWSER_WEB_CONTENTS_AURA_GESTURE_NAV_SIMPLE_H_ |