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/*
* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef MODULES_DESKTOP_CAPTURE_MOUSE_CURSOR_MONITOR_H_
#define MODULES_DESKTOP_CAPTURE_MOUSE_CURSOR_MONITOR_H_
#include <memory>
#include "modules/desktop_capture/desktop_capture_types.h"
#include "modules/desktop_capture/desktop_geometry.h"
#include "rtc_base/system/rtc_export.h"
namespace webrtc {
class DesktopCaptureOptions;
class DesktopFrame;
class MouseCursor;
// Captures mouse shape and position.
class MouseCursorMonitor {
public:
// Deprecated: CursorState will not be provided.
enum CursorState {
// Cursor on top of the window including window decorations.
INSIDE,
// Cursor is outside of the window.
OUTSIDE,
};
enum Mode {
// Capture only shape of the mouse cursor, but not position.
SHAPE_ONLY,
// Capture both, mouse cursor shape and position.
SHAPE_AND_POSITION,
};
// Callback interface used to pass current mouse cursor position and shape.
class Callback {
public:
// Called in response to Capture() when the cursor shape has changed. Must
// take ownership of `cursor`.
virtual void OnMouseCursor(MouseCursor* cursor) = 0;
// Called in response to Capture(). `position` indicates cursor position
// relative to the `window` specified in the constructor.
// Deprecated: use the following overload instead.
virtual void OnMouseCursorPosition(CursorState /* state */,
const DesktopVector& /* position */) {}
// Called in response to Capture(). `position` indicates cursor absolute
// position on the system in fullscreen coordinate, i.e. the top-left
// monitor always starts from (0, 0).
// The coordinates of the position is controlled by OS, but it's always
// consistent with DesktopFrame.rect().top_left().
// TODO(zijiehe): Ensure all implementations return the absolute position.
// TODO(zijiehe): Current this overload works correctly only when capturing
// mouse cursor against fullscreen.
virtual void OnMouseCursorPosition(const DesktopVector& /* position */) {}
protected:
virtual ~Callback() {}
};
virtual ~MouseCursorMonitor() {}
// Creates a capturer that notifies of mouse cursor events while the cursor is
// over the specified window.
//
// Deprecated: use Create() function.
static MouseCursorMonitor* CreateForWindow(
const DesktopCaptureOptions& options,
WindowId window);
// Creates a capturer that monitors the mouse cursor shape and position over
// the specified screen.
//
// Deprecated: use Create() function.
static RTC_EXPORT MouseCursorMonitor* CreateForScreen(
const DesktopCaptureOptions& options,
ScreenId screen);
// Creates a capturer that monitors the mouse cursor shape and position across
// the entire desktop. The capturer ensures that the top-left monitor starts
// from (0, 0).
static RTC_EXPORT std::unique_ptr<MouseCursorMonitor> Create(
const DesktopCaptureOptions& options);
// Initializes the monitor with the `callback`, which must remain valid until
// capturer is destroyed.
virtual void Init(Callback* callback, Mode mode) = 0;
// Captures current cursor shape and position (depending on the `mode` passed
// to Init()). Calls Callback::OnMouseCursor() if cursor shape has
// changed since the last call (or when Capture() is called for the first
// time) and then Callback::OnMouseCursorPosition() if mode is set to
// SHAPE_AND_POSITION.
virtual void Capture() = 0;
};
} // namespace webrtc
#endif // MODULES_DESKTOP_CAPTURE_MOUSE_CURSOR_MONITOR_H_
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