* src/xterm.c (struct x_client_list_window): New struct.
(x_dnd_free_toplevels, x_dnd_compute_toplevels)
(x_dnd_get_target_window_1): New functions.
(x_dnd_get_target_window): Search in the toplevel list if it
exists.
(x_dnd_cleanup_drag_and_drop): Clean up toplevel list.
(x_dnd_begin_drag_and_drop): Compute toplevel list if the
window manager supports it.
(handle_one_xevent): Update the toplevel list if prudent.
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Copyright (C) 2001-2022 Free Software Foundation, Inc.
See the end of the file for license conditions.
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See the files ../README and then ../INSTALL for installation instructions.
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This file is part of GNU Emacs.
GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
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