Correct several EWMH properties

The following EWMH properties on the root window are corrected in this commit:
_NET_VIRTUAL_ROOTS, _NET_WORKAREA and _NET_DESKTOP_VIEWPORT.

exwm-floating.el

@@ -381,9 +381,13 @@
   "Perform move/resize."
   (when exwm-floating--moveresize-calculate
     (let ((obj (make-instance 'xcb:MotionNotify))
-          (frame-x (or (frame-parameter exwm-workspace--current 'exwm-x) 0))
+          (geometry (frame-parameter exwm-workspace--current 'exwm-geometry))
-          (frame-y (or (frame-parameter exwm-workspace--current 'exwm-y) 0))
+          (frame-x 0)
+          (frame-y 0)
           result)
+      (when geometry
+        (setq frame-x (slot-value geometry 'x)
+              frame-y (slot-value geometry 'y)))
       (xcb:unmarshal obj data)
       (setq result (funcall exwm-floating--moveresize-calculate
                             (slot-value obj 'root-x) (slot-value obj 'root-y)))

exwm-layout.el

@@ -167,15 +167,14 @@
 ;; frame to the actual monitor size, `exwm-layout-set-fullscreen' resizes an X
 ;; window to the frame size.
 (defun exwm-layout--set-frame-fullscreen (frame)
-  "Make frame FRAME fullscreen, with regard to its XRandR output if applicable."
+  "Make frame FRAME fullscreen, with regard to its RandR output if applicable."
   (let ((geometry (or (frame-parameter frame 'exwm-geometry)
-                      (xcb:+request-unchecked+reply
+                      (xcb:+request-unchecked+reply exwm--connection
-                          exwm--connection
                           (make-instance 'xcb:GetGeometry
                                          :drawable exwm--root))
                       (make-instance 'xcb:RECTANGLE :x 0 :y 0
-                                     :width (x-display-width)
+                                     :width (x-display-pixel-width)
-                                     :height (x-display-height))))
+                                     :height (x-display-pixel-height))))
         (id (frame-parameter frame 'exwm-outer-id)))
     (with-slots (x y width height) geometry
       (xcb:+request exwm--connection

exwm-randr.el

@@ -36,9 +36,6 @@
 ;; With above lines, workspace 0 should be assigned to the output named "VGA1",
 ;; staying at the left of other workspaces on the output "LVDS1".
 
-;; Todo:
-;; + Update EWMH hints.
-
 ;; References:
 ;; + RandR (http://www.x.org/archive/X11R7.7/doc/randrproto/randrproto.txt)
 
@@ -50,7 +47,7 @@
 
 (defun exwm-randr--refresh ()
   "Refresh workspaces according to the updated RandR info."
-  (let (output-plist default-geometry)
+  (let (geometry output-plist default-geometry workareas viewports)
     ;; Query all outputs
     (with-slots (config-timestamp outputs)
         (xcb:+request-unchecked+reply exwm--connection
@@ -72,10 +69,12 @@
                     (make-instance 'xcb:randr:GetCrtcInfo
                                    :crtc crtc
                                    :config-timestamp config-timestamp))
-              (setq output-plist (plist-put output-plist name
+              (setq geometry (make-instance 'xcb:RECTANGLE
-                                            (vector x y width height)))
+                                            :x x :y y
+                                            :width width :height height)
+                    output-plist (plist-put output-plist name geometry))
               (unless default-geometry ;assume the first output as primary
-                (setq default-geometry (vector x y width height))))))))
+                (setq default-geometry geometry)))))))
     (cl-assert (<= 2 (length output-plist)))
     (dotimes (i exwm-workspace-number)
       (let* ((output (plist-get exwm-randr-workspace-output-plist i))
@@ -85,14 +84,8 @@
           (setq geometry default-geometry
                 output nil))
         (set-frame-parameter frame 'exwm-randr-output output)
-        (set-frame-parameter frame 'exwm-geometry
+        (set-frame-parameter frame 'exwm-geometry geometry)
-                             (make-instance 'xcb:RECTANGLE
+        (with-slots (x y width height) geometry
-                                            :x (elt geometry 0)
-                                            :y (elt geometry 1)
-                                            :width (elt geometry 2)
-                                            :height (elt geometry 3)))
-        (set-frame-parameter frame 'exwm-x (elt geometry 0))
-        (set-frame-parameter frame 'exwm-y (elt geometry 1))
           (xcb:+request exwm--connection
               (make-instance 'xcb:ConfigureWindow
                              :window (frame-parameter frame 'exwm-outer-id)
@@ -100,8 +93,18 @@
                                                  xcb:ConfigWindow:Y
                                                  xcb:ConfigWindow:Width
                                                  xcb:ConfigWindow:Height)
-                           :x (elt geometry 0) :y (elt geometry 1)
+                             :x x :y y :width width :height height))
-                           :width (elt geometry 2) :height (elt geometry 3)))))
+          (setq workareas (nconc workareas (list x y width height))
+                viewports (nconc viewports (list x y))))))
+    ;; Update _NET_WORKAREA
+    (xcb:+request exwm--connection
+        (make-instance 'xcb:ewmh:set-_NET_WORKAREA
+                       :window exwm--root :data (vconcat workareas)))
+    ;; Update _NET_DESKTOP_VIEWPORT
+    (xcb:+request exwm--connection
+      (make-instance 'xcb:ewmh:set-_NET_DESKTOP_VIEWPORT
+                     :window exwm--root
+                     :data (vconcat viewports)))
     (xcb:flush exwm--connection)))
 
 (defun exwm-randr--init ()

exwm-workspace.el

@@ -264,6 +264,14 @@ The optional FORCE option is for internal use only."
   (raise-frame (car exwm-workspace--list))
   ;; Handle unexpected frame switch
   (add-hook 'focus-in-hook 'exwm-workspace--on-focus-in)
+  ;; Set _NET_VIRTUAL_ROOTS
+  (xcb:+request exwm--connection
+      (make-instance 'xcb:ewmh:set-_NET_VIRTUAL_ROOTS
+                     :window exwm--root
+                     :data (vconcat (mapcar
+                                     (lambda (i)
+                                       (frame-parameter i 'exwm-window-id))
+                                     exwm-workspace--list))))
   ;; Switch to the first workspace
   (exwm-workspace-switch 0 t))
 

exwm.el

@@ -579,20 +579,12 @@
                      :data (make-vector (* 2 exwm-workspace-number) 0)))
   ;; Set _NET_WORKAREA (with minibuffer and bottom mode-line excluded)
   (let* ((workareas
-          (vconcat (window-absolute-pixel-edges (get-largest-window t))))
+          (vector 0 0 (x-display-pixel-width) (x-display-pixel-height)))
          (workareas (mapconcat (lambda (i) workareas)
                                (make-list exwm-workspace-number 0) [])))
     (xcb:+request exwm--connection
         (make-instance 'xcb:ewmh:set-_NET_WORKAREA
                        :window exwm--root :data workareas)))
-  ;; Set _NET_VIRTUAL_ROOTS
-  (xcb:+request exwm--connection
-      (make-instance 'xcb:ewmh:set-_NET_VIRTUAL_ROOTS
-                     :window exwm--root
-                     :data (vconcat (mapcar
-                                     (lambda (i)
-                                       (frame-parameter i 'exwm-window-id))
-                                     exwm-workspace--list))))
   (xcb:flush exwm--connection))
 
 (defvar exwm-init-hook nil