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// Copyright (c) 2015 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_MEDIA_CAPTURE_WINDOW_ACTIVITY_TRACKER_H_
#define CONTENT_BROWSER_MEDIA_CAPTURE_WINDOW_ACTIVITY_TRACKER_H_
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "content/common/content_export.h"
#include "ui/gfx/native_widget_types.h"
namespace content {
// WindowActivityTracker is an interface that can be implememented to report
// whether the user is actively interacting with UI.
class CONTENT_EXPORT WindowActivityTracker {
public:
static scoped_ptr<WindowActivityTracker> Create(gfx::NativeView view);
WindowActivityTracker();
virtual ~WindowActivityTracker();
// Returns true if UI interaction is active.
bool IsUiInteractionActive() const;
// Reports on every mouse movement activity on the window.
void RegisterMouseInteractionObserver(const base::Closure& observer);
// Resets any previous UI activity tracked.
void Reset();
// Returns a weak pointer.
virtual base::WeakPtr<WindowActivityTracker> GetWeakPtr() = 0;
protected:
void OnMouseActivity();
private:
// The last time a UI event was detected.
base::TimeTicks last_time_ui_event_detected_;
// Runs on any mouse interaction from user.
base::Closure mouse_interaction_observer_;
// The number of UI events detected so far. In case of continuous events
// such as mouse movement, a single continuous movement is treated
// as one event.
int ui_events_count_;
DISALLOW_COPY_AND_ASSIGN(WindowActivityTracker);
};
} // namespace content
#endif // CONTENT_BROWSER_MEDIA_CAPTURE_WINDOW_ACTIVITY_TRACKER_H_
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