Allow user to hide floating X windows

* exwm-core.el (exwm-mode-map): Add a new key to hide floating X windows.
* exwm-floating.el (exwm-floating-hide): New command to hide a floating X
window.

* exwm-workspace.el: Fix a compile warning.

1 files changed, 16 insertions, 0 deletions

diff --git a/exwm-floating.el b/exwm-floating.el
index 457705322c..ba162f67e1 100644
--- a/exwm-floating.el
+++ b/exwm-floating.el
@@ -284,6 +284,22 @@
         (exwm-floating--unset-floating exwm--id)
       (exwm-floating--set-floating exwm--id))))
 
+;;;###autoload
+(defun exwm-floating-hide ()
+  "Hide the current floating X window (which would show again when selected)."
+  (interactive)
+  (when (and (eq major-mode 'exwm-mode)
+             exwm--floating-frame)
+    ;; Put this floating X window at bottom.
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:ConfigureWindow
+                       :window exwm--container
+                       :value-mask xcb:ConfigWindow:StackMode
+                       :stack-mode xcb:StackMode:Below))
+    ;; FIXME: Should it be put into iconic state?
+    (xcb:flush exwm--connection)
+    (select-frame-set-input-focus exwm-workspace--current)))
+
 (define-obsolete-function-alias 'exwm-floating-hide-mode-line
   'exwm-layout-hide-mode-line "25.1" "Hide mode-line of a floating frame.")
 (define-obsolete-function-alias 'exwm-floating-show-mode-line