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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_ANDROID_OVERSCROLL_REFRESH_HANDLER_H_
#define UI_ANDROID_OVERSCROLL_REFRESH_HANDLER_H_
#include "base/android/scoped_java_ref.h"
#include "ui/android/overscroll_refresh.h"
#include "ui/android/ui_android_export.h"
#include "ui/events/back_gesture_event.h"
namespace ui {
class UI_ANDROID_EXPORT OverscrollRefreshHandler {
public:
explicit OverscrollRefreshHandler(
const base::android::JavaRef<jobject>& j_overscroll_refresh_handler);
// Note: the following methods are virtual because this class is overridden
// for testing in overscroll_refresh_unittest.cc
virtual ~OverscrollRefreshHandler();
// Signals the start of an overscrolling pull. Returns whether the handler
// will consume the overscroll gesture, in which case it will receive the
// remaining pull updates.
virtual bool PullStart(
OverscrollAction type,
std::optional<BackGestureEventSwipeEdge> initiating_edge);
// Signals a pull update, where |x_delta| and |y_delta| are in device pixels.
virtual void PullUpdate(float x_delta, float y_delta);
// Signals the release of the pull, and whether the release is allowed to
// trigger the refresh action.
virtual void PullRelease(bool allow_refresh);
// Reset the active pull state.
virtual void PullReset();
private:
base::android::ScopedJavaGlobalRef<jobject> j_overscroll_refresh_handler_;
};
} // namespace ui
#endif // UI_ANDROID_OVERSCROLL_REFRESH_HANDLER_H_
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