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// Copyright 2013 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_BASE_X_X11_WHOLE_SCREEN_MOVE_LOOP_H_
#define UI_BASE_X_X11_WHOLE_SCREEN_MOVE_LOOP_H_
#include <stdint.h>
#include <memory>
#include "base/component_export.h"
#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "ui/base/x/x11_move_loop.h"
#include "ui/base/x/x11_move_loop_delegate.h"
#include "ui/events/platform/platform_event_dispatcher.h"
#include "ui/gfx/geometry/vector2d_f.h"
#include "ui/gfx/image/image_skia.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/gfx/x/connection.h"
namespace x11 {
class ScopedEventSelector;
}
namespace ui {
class MouseEvent;
class ScopedEventDispatcher;
// Runs a nested run loop and grabs the mouse. This is used to implement
// dragging.
class COMPONENT_EXPORT(UI_BASE_X) X11WholeScreenMoveLoop
: public X11MoveLoop,
public ui::PlatformEventDispatcher {
public:
explicit X11WholeScreenMoveLoop(X11MoveLoopDelegate* delegate);
X11WholeScreenMoveLoop(const X11WholeScreenMoveLoop&) = delete;
X11WholeScreenMoveLoop& operator=(const X11WholeScreenMoveLoop&) = delete;
~X11WholeScreenMoveLoop() override;
// ui:::PlatformEventDispatcher:
bool CanDispatchEvent(const ui::PlatformEvent& event) override;
uint32_t DispatchEvent(const ui::PlatformEvent& event) override;
// X11MoveLoop:
bool RunMoveLoop(bool can_grab_pointer,
scoped_refptr<ui::X11Cursor> old_cursor,
scoped_refptr<ui::X11Cursor> new_cursor,
base::OnceClosure started_callback) override;
void UpdateCursor(scoped_refptr<ui::X11Cursor> cursor) override;
void EndMoveLoop() override;
private:
// Grabs the pointer, setting the mouse cursor to |cursor|. Returns true if
// successful.
bool GrabPointer(scoped_refptr<X11Cursor> cursor);
void GrabEscKey();
// Creates an input-only window to be used during the drag.
void CreateDragInputWindow(x11::Connection* connection);
void PostDispatchIfNeeded(const ui::MouseEvent& event);
raw_ptr<X11MoveLoopDelegate> delegate_;
// Are we running a nested run loop from RunMoveLoop()?
bool in_move_loop_;
std::unique_ptr<ui::ScopedEventDispatcher> nested_dispatcher_;
// Cursor in use prior to the move loop starting. Restored when the move loop
// quits.
scoped_refptr<X11Cursor> initial_cursor_;
// An invisible InputOnly window. Keyboard grab and sometimes mouse grab
// are set on this window.
x11::Window grab_input_window_;
// Events selected on |grab_input_window_|.
x11::ScopedEventSelector grab_input_window_events_;
// Whether the pointer was grabbed on |grab_input_window_|.
bool grabbed_pointer_;
base::OnceClosure quit_closure_;
// Keeps track of whether the move-loop is cancled by the user (e.g. by
// pressing escape).
bool canceled_;
base::WeakPtrFactory<X11WholeScreenMoveLoop> weak_factory_{this};
};
} // namespace ui
#endif // UI_BASE_X_X11_WHOLE_SCREEN_MOVE_LOOP_H_
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