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// Copyright 2012 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 CC_INPUT_SCROLLBAR_ANIMATION_CONTROLLER_H_
#define CC_INPUT_SCROLLBAR_ANIMATION_CONTROLLER_H_
#include "base/cancelable_callback.h"
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
#include "cc/base/cc_export.h"
#include "cc/input/single_scrollbar_animation_controller_thinning.h"
#include "cc/layers/layer_impl.h"
#include "cc/layers/scrollbar_layer_impl_base.h"
#include "ui/gfx/geometry/vector2d_f.h"
namespace cc {
class CC_EXPORT ScrollbarAnimationControllerClient {
public:
virtual void PostDelayedScrollbarAnimationTask(const base::Closure& task,
base::TimeDelta delay) = 0;
virtual void SetNeedsRedrawForScrollbarAnimation() = 0;
virtual void SetNeedsAnimateForScrollbarAnimation() = 0;
virtual void DidChangeScrollbarVisibility() = 0;
virtual ScrollbarSet ScrollbarsFor(int scroll_layer_id) const = 0;
protected:
virtual ~ScrollbarAnimationControllerClient() {}
};
// This class show scrollbars when scroll and fade out after an idle delay.
// The fade animations works on both scrollbars and is controlled in this class
// This class also passes the mouse state to each
// SingleScrollbarAnimationControllerThinning. The thinning animations are
// independent between vertical/horizontal and are managed by the
// SingleScrollbarAnimationControllerThinnings.
class CC_EXPORT ScrollbarAnimationController {
public:
// ScrollbarAnimationController for Android. It only has show & fade out
// animation.
static std::unique_ptr<ScrollbarAnimationController>
CreateScrollbarAnimationControllerAndroid(
int scroll_layer_id,
ScrollbarAnimationControllerClient* client,
base::TimeDelta fade_out_delay,
base::TimeDelta fade_out_resize_delay,
base::TimeDelta fade_out_duration);
// ScrollbarAnimationController for Desktop Overlay Scrollbar. It has show &
// fade out animation and thinning animation.
static std::unique_ptr<ScrollbarAnimationController>
CreateScrollbarAnimationControllerAuraOverlay(
int scroll_layer_id,
ScrollbarAnimationControllerClient* client,
base::TimeDelta show_delay,
base::TimeDelta fade_out_delay,
base::TimeDelta fade_out_resize_delay,
base::TimeDelta fade_out_duration,
base::TimeDelta thinning_duration);
~ScrollbarAnimationController();
bool ScrollbarsHidden() const;
bool Animate(base::TimeTicks now);
void DidScrollBegin();
void DidScrollUpdate(bool on_resize);
void DidScrollEnd();
void DidMouseDown();
void DidMouseUp();
void DidMouseLeave();
void DidMouseMoveNear(ScrollbarOrientation, float);
bool mouse_is_over_scrollbar(ScrollbarOrientation orientation) const;
bool mouse_is_near_scrollbar(ScrollbarOrientation orientation) const;
bool mouse_is_near_any_scrollbar() const;
static constexpr float kMouseMoveDistanceToTriggerShow = 30.0f;
private:
ScrollbarAnimationController(int scroll_layer_id,
ScrollbarAnimationControllerClient* client,
base::TimeDelta fade_out_delay,
base::TimeDelta fade_out_resize_delay,
base::TimeDelta fade_out_duration);
ScrollbarAnimationController(int scroll_layer_id,
ScrollbarAnimationControllerClient* client,
base::TimeDelta show_delay,
base::TimeDelta fade_out_delay,
base::TimeDelta fade_out_resize_delay,
base::TimeDelta fade_out_duration,
base::TimeDelta thinning_duration);
ScrollbarSet Scrollbars() const;
SingleScrollbarAnimationControllerThinning& GetScrollbarAnimationController(
ScrollbarOrientation) const;
// Returns how far through the animation we are as a progress value from
// 0 to 1.
float AnimationProgressAtTime(base::TimeTicks now);
void RunAnimationFrame(float progress);
void StartAnimation();
void StopAnimation();
void Show();
void PostDelayedShow();
void PostDelayedFadeOut(bool on_resize);
bool Captured() const;
bool CalcNeedTriggerScrollbarShow(ScrollbarOrientation orientation,
float distance) const;
void ApplyOpacityToScrollbars(float opacity);
ScrollbarAnimationControllerClient* client_;
base::TimeTicks last_awaken_time_;
// show_delay_ is only for the case where the mouse hovers near the screen
// edge.
base::TimeDelta show_delay_;
base::TimeDelta fade_out_delay_;
base::TimeDelta fade_out_resize_delay_;
bool need_trigger_scrollbar_show_;
bool is_animating_;
const int scroll_layer_id_;
bool currently_scrolling_;
bool scroll_gesture_has_scrolled_;
base::CancelableClosure delayed_scrollbar_show_;
base::CancelableClosure delayed_scrollbar_fade_out_;
float opacity_;
base::TimeDelta fade_out_duration_;
const bool need_thinning_animation_;
std::unique_ptr<SingleScrollbarAnimationControllerThinning>
vertical_controller_;
std::unique_ptr<SingleScrollbarAnimationControllerThinning>
horizontal_controller_;
base::WeakPtrFactory<ScrollbarAnimationController> weak_factory_;
};
} // namespace cc
#endif // CC_INPUT_SCROLLBAR_ANIMATION_CONTROLLER_H_
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