Add auto-hiding minibuffer support

* exwm-floating.el (exwm-floating--set-floating): Take auto-hiding
minibuffer into account when calculating available height.
(exwm-floating--unset-floating): Restack the container to avoid further
restacking.
* exwm-input.el (exwm-input--update-focus): Use more accurate restacking.
(exwm-input--on-minibuffer-setup): Replaced by
`exwm-layout--on-minibuffer-setup' and `exwm-workspace--on-minibuffer-setup'.
(exwm-input-command-whitelist, exwm-input--during-command)
(exwm-input--on-KeyPress-line-mode): The functionality of
`exwm-input-command-whitelist' is replaced by `exwm-input--during-command',
which can automatically tell whether functions like `read-event' are being
called.
(exwm-input--init): Add/remove corresponding hooks.
* exwm-layout.el (exwm-layout--on-minibuffer-setup): Also set input focus.
(exwm-layout--on-echo-area-change): New function for refreshing layout when
the size of echo area changes.
(exwm-layout--init): Track size changes for fixed minibuffer and echo area.
* exwm-manage.el (exwm-manage--on-ConfigureRequest): Never grant restacking
requests initiated by other clients.
* exwm-workspace.el (exwm-workspace--minibuffer): New variable for the
auto-hiding minibuffer.
(exwm-workspace-minibuffer-position): For setting the position of the
auto-hiding minibuffer.
(exwm-workspace-display-echo-area-timeout): Seconds before echo area
auto-hides.
(exwm-workspace--display-echo-area-timer): The corresponding timer.
(exwm-workspace-switch): Configure the auto-hiding minibuffer when
switching workspace.
(exwm-workspace--update-minibuffer): New function for adjusting the height
of the auto-hiding minibuffer.
(exwm-workspace--on-ConfigureNotify): New function for configuring the
container of the auto-hiding minibuffer.
(exwm-workspace--display-buffer): New function for forcing
`minibuffer-completion-help' to use the workspace frame.
(exwm-workspace--show-minibuffer, exwm-workspace--hide-minibuffer):
New functions for showing/hiding the auto-hiding minibuffer (container).
(exwm-workspace--on-minibuffer-setup, exwm-workspace--on-minibuffer-exit):
New functions called when the auto-hiding minibuffer entered/exists.
(exwm-workspace--on-echo-area-dirty, exwm-workspace--on-echo-area-clear):
New functions when the auto-hiding echo area is ready to show/hide.
(exwm-workspace--init): Set up the auto-hiding minibuffer and workspace
frames.  Track sizes changes for auto-hiding minibuffer and echo area.
No need to set OverrideRedirect on workspace frames.
* exwm.el (exwm--init-icccm-ewmh): Correct the value of _NET_WORKAREA.

1 files changed, 15 insertions, 3 deletions

diff --git a/exwm-floating.el b/exwm-floating.el
index 88fa2077e7..ff584c03ee 100644
--- a/exwm-floating.el
+++ b/exwm-floating.el
@@ -106,8 +106,10 @@
     ;; FIXME: check normal hints restrictions
     (let* ((display-width (frame-pixel-width original-frame))
            (display-height (- (frame-pixel-height original-frame)
-                              (window-pixel-height (minibuffer-window
-                                                    original-frame))
+                              (if exwm-workspace-minibuffer-position
+                                  0
+                                (window-pixel-height (minibuffer-window
+                                                      original-frame)))
                               (* 2 (window-mode-line-height))
                               (window-header-line-height window)
                               (* 2 exwm-floating-border-width)))
@@ -180,12 +182,22 @@
   (interactive)
   (let ((buffer (exwm--id->buffer id)))
     (with-current-buffer buffer
+      ;; Reparent the container to the workspace
       (xcb:+request exwm--connection
           (make-instance 'xcb:ReparentWindow
                          :window exwm--container
                          :parent (frame-parameter exwm-workspace--current
                                                   'exwm-workspace)
-                         :x 0 :y 0)))   ;temporary position
+                         :x 0 :y 0))    ;temporary position
+      ;; Put the container just above the Emacs frame
+      (xcb:+request exwm--connection
+          (make-instance 'xcb:ConfigureWindow
+                         :window exwm--container
+                         :value-mask (logior xcb:ConfigWindow:Sibling
+                                             xcb:ConfigWindow:StackMode)
+                         :sibling (frame-parameter exwm-workspace--current
+                                                   'exwm-outer-id)
+                         :stack-mode xcb:StackMode:Above)))
     (xcb:flush exwm--connection)
     (with-current-buffer buffer
       (when exwm--floating-frame        ;from floating to non-floating