Thank you Brandon; here is:

xwininfo: Window id: 0xa00006 "xwininfo - CopyQ"

  Absolute upper-left X:  0
  Absolute upper-left Y:  0
  Relative upper-left X:  0
  Relative upper-left Y:  0
  Width: 1918
  Height: 538
  Depth: 24
  Visual: 0xde
  Visual Class: TrueColor
  Border width: 1
  Class: InputOutput
  Colormap: 0xa00005 (not installed)
  Bit Gravity State: NorthWestGravity
  Window Gravity State: NorthWestGravity
  Backing Store State: NotUseful
  Save Under State: no
  Map State: IsViewable
  Override Redirect State: no
  Corners:  +0+0  -0+0  -0-540  +0-540
  -geometry 1918x538+0+0


xprop
WM_STATE(WM_STATE):
window state: Normal
icon window: 0x0
_NET_WM_USER_TIME(CARDINAL) = 875255286
_NET_WM_ICON(CARDINAL) = Icon (16 x 16): <edited>
Icon (32 x 32): <edited>
Icon (64 x 64):<edited>
Icon (128 x 128): <edited>

_NET_WM_ICON_NAME(UTF8_STRING) =
XdndAware(ATOM) = BITMAP
WM_NAME(STRING) = "xprop - CopyQ"
_NET_WM_NAME(UTF8_STRING) = "xprop - CopyQ"
_MOTIF_WM_HINTS(_MOTIF_WM_HINTS) = 0x3, 0x3e, 0x7e, 0x0, 0x0
_NET_WM_WINDOW_TYPE(ATOM) = _NET_WM_WINDOW_TYPE_NORMAL
_XEMBED_INFO(_XEMBED_INFO) = 0x0, 0x1
WM_CLIENT_LEADER(WINDOW): window id # 0xa00008
WM_HINTS(WM_HINTS):
Client accepts input or input focus: True
Initial state is Normal State.
_NET_WM_PID(CARDINAL) = 16725
_NET_WM_SYNC_REQUEST_COUNTER(CARDINAL) = 10485767
WM_CLASS(STRING) = "copyq", "copyq"
WM_PROTOCOLS(ATOM): protocols  WM_DELETE_WINDOW, WM_TAKE_FOCUS, _NET_WM_PING, _NET_WM_SYNC_REQUEST
WM_NORMAL_HINTS(WM_SIZE_HINTS):
user specified location: 0, 0
user specified size: 958 by 1078
program specified minimum size: 108 by 88
window gravity: NorthWest


On Sun, 21 Jul 2019 at 14:28, Brandon Allbery <allbery.b@gmail.com> wrote:
I can't currently install or experiment with it (maybe in a day or so), but it would help if you could report the output of xwininfo and xprop on this window. Both programs let you click on a window to select it, so even if the program is badly behaved you can run them with a "sleep" to pop up the window during the sleep period and then wait for the cursor to change to a crosshair.

On Sat, Jul 20, 2019 at 6:04 PM Jean-Baptiste Mestelan <mestelan@gmail.com> wrote:
Hello, 

I have been struggling to integrate the CopyQ clipboard manager into my configuration, because its main window cannot be closed: killing the window has no effect, and in the context of a scratchpad, the toggle does not work (the window appears but does not disappear).
Minimizing the window does work; but then, it can only be maximized from the same workspace, which is not ideal for this use case.

I have come up with a so-so solution: summon the window from a named scratchpad, and get rid of it by sending it to a NSP workspace:
("M-a",                     shiftTo Next (WSIs nsp))
...
where nsp = return $ ("NSP" ==) . W.tag
But it is cumbersome to have to manipulate two distinct keybindings (plus the latter might send an innocent window into a void).

Is there an obvious solution that I am missing?

PS: to be clear, I am only speaking about the window displayed by the CopyQ command `copyq toggle` (or `copyq show`). The smaller floating window displayed by the CopyQ command `copyq menu` does not have this issue; but is is also limited in functionalities and history length.

PPS: I guess an improvement would be to integrate the above `shiftTo` function into a custom kill function, which would have two cases, depending of the name of the window. I do not know how to write this however, and would appreciate any pointers or suggestions.

Thank you for attention.
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--
brandon s allbery kf8nh