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// 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_ANDROID_OVERSCROLL_CONTROLLER_ANDROID_H_
#define CONTENT_BROWSER_ANDROID_OVERSCROLL_CONTROLLER_ANDROID_H_
#include "base/time/time.h"
#include "content/browser/android/overscroll_glow.h"
#include "content/browser/android/overscroll_refresh.h"
#include "content/common/input/input_event_ack_state.h"
#include "content/public/browser/web_contents_observer.h"
#include "ui/gfx/geometry/vector2d_f.h"
namespace blink {
class WebGestureEvent;
}
namespace cc {
class CompositorFrameMetadata;
class Layer;
}
namespace ui {
class WindowAndroidCompositor;
}
namespace content {
class ContentViewCoreImpl;
struct DidOverscrollParams;
// Glue class for handling all inputs into Android-specific overscroll effects,
// both the passive overscroll glow and the active overscroll pull-to-refresh.
// Note that all input coordinates (both for events and overscroll) are in DIPs.
class OverscrollControllerAndroid : public OverscrollGlowClient,
public WebContentsObserver {
public:
explicit OverscrollControllerAndroid(ContentViewCoreImpl* content_view_core);
~OverscrollControllerAndroid() override;
// Returns true if |event| is consumed by an overscroll effect, in which
// case it should cease propagation.
bool WillHandleGestureEvent(const blink::WebGestureEvent& event);
// To be called upon receipt of a gesture event ack.
void OnGestureEventAck(const blink::WebGestureEvent& event,
InputEventAckState ack_result);
// To be called upon receipt of an overscroll event.
void OnOverscrolled(const DidOverscrollParams& overscroll_params);
// Returns true if the effect still needs animation ticks.
// Note: The effect will detach itself when no further animation is required.
bool Animate(base::TimeTicks current_time, cc::Layer* parent_layer);
// To be called whenever the content frame has been updated.
void OnFrameMetadataUpdated(const cc::CompositorFrameMetadata& metadata);
// Toggle activity of any overscroll effects. When disabled, events will be
// ignored until the controller is re-enabled.
void Enable();
void Disable();
private:
// WebContentsObserver implementation.
void DidToggleFullscreenModeForTab(bool entered_fullscreen) override;
// OverscrollGlowClient implementation.
scoped_ptr<EdgeEffectBase> CreateEdgeEffect() override;
void SetNeedsAnimate();
ui::WindowAndroidCompositor* const compositor_;
const float dpi_scale_;
bool enabled_;
// TODO(jdduke): Factor out a common API from the two overscroll effects.
scoped_ptr<OverscrollGlow> glow_effect_;
scoped_ptr<OverscrollRefresh> refresh_effect_;
// For fullscreen HTML5 scenarios, the refresh effect will be disabled.
bool is_fullscreen_;
DISALLOW_COPY_AND_ASSIGN(OverscrollControllerAndroid);
};
} // namespace content
#endif // CONTENT_BROWSER_ANDROID_OVERSCROLL_CONTROLLER_ANDROID_H_
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