1 files changed, 110 insertions, 0 deletions

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+#!/bin/sh
+#| -*- scheme -*-
+exec csi -ss "$0" "$@"                  ; acdwm
+based on tinywm: https://github.com/mackstann/tinywm/
+|#
+
+(import (chicken bitwise)
+        (chicken process-context)
+        (srfi 1)
+        matchable
+        xlib)
+
+(define TRUE 1)
+(define FALSE 0)
+
+(define dpy (make-parameter #f))
+(define screen (make-parameter #f))
+(define root (make-parameter #f))
+
+(define (grab-keys)
+  (xgrabkey (dpy)
+            (char->integer (xkeysymtokeycode (dpy) (xstringtokeysym "F1")))
+            MOD1MASK
+            (root)
+            TRUE
+            GRABMODEASYNC
+            GRABMODEASYNC)
+  (xgrabbutton (dpy)
+               1
+               MOD1MASK
+               (root)
+               TRUE
+               (bitwise-ior BUTTONPRESSMASK
+                            BUTTONRELEASEMASK
+                            POINTERMOTIONMASK)
+               GRABMODEASYNC
+               GRABMODEASYNC
+               NONE
+               NONE)
+  (xgrabbutton (dpy)
+               3
+               MOD1MASK
+               (root)
+               TRUE
+               (bitwise-ior BUTTONPRESSMASK
+                            BUTTONRELEASEMASK
+                            POINTERMOTIONMASK)
+               GRABMODEASYNC
+               GRABMODEASYNC
+               NONE
+               NONE))
+
+(define (handle-events)
+  (let ((event (make-xevent))
+        (start (make-xbuttonevent))
+        (attrs (make-xwindowattributes)))
+    (set-xbuttonevent-subwindow! start NONE)
+    (let loop ()
+      (xnextevent (dpy) event)
+      (cond
+       ((and (= KEYPRESS (xevent-type event))
+             (not (= NONE (xevent-xkey-subwindow event))))
+        (xraisewindow (dpy) (xevent-xkey-subwindow event)))
+
+       ((and (= BUTTONPRESS (xevent-type event))
+             (not (= NONE (xevent-xbutton-subwindow event))))
+        (print "button!")
+        (xgetwindowattributes (dpy) (xevent-xbutton-subwindow event) attrs)
+        (set-xbuttonevent-x_root! start (xevent-xbutton-x_root event))
+        (set-xbuttonevent-y_root! start (xevent-xbutton-y_root event))
+        (set-xbuttonevent-button! start (xevent-xbutton-button event))
+        (set-xbuttonevent-subwindow! start (xevent-xbutton-subwindow event)))
+
+       ((and (= MOTIONNOTIFY (xevent-type event))
+             (not (= NONE (xbuttonevent-subwindow start))))
+        (let ((xdiff (- (xevent-xbutton-x_root event)
+                        (xbuttonevent-x_root start)))
+              (ydiff (- (xevent-xbutton-y_root event)
+                        (xbuttonevent-y_root start)))
+              (button (xbuttonevent-button start)))
+          (xmoveresizewindow (dpy)
+                             (xbuttonevent-subwindow start)
+                             (+ (xwindowattributes-x attrs)
+                                (if (= button 1) xdiff 0))
+                             (+ (xwindowattributes-y attrs)
+                                (if (= button 1) ydiff 0))
+                             (max 1 (+ (xwindowattributes-width attrs)
+                                       (if (= button 3) xdiff 0)))
+                             (max 1 (+ (xwindowattributes-height attrs)
+                                       (if (= button 3) ydiff 0))))))
+
+       ((= BUTTONRELEASE (xevent-type event))
+        (print "buttonrelease!")
+        (set-xbuttonevent-subwindow! start NONE)))
+
+      ;; Annnd go around again
+      (loop))))
+
+(define (main args)
+  (parameterize ((dpy (xopendisplay #f)))
+    (assert (dpy))
+    (parameterize ((screen (xdefaultscreen (dpy))))
+      (parameterize ((root (xrootwindow (dpy) (screen))))
+        (grab-keys)
+        (handle-events)))))
+
+(cond-expand
+  ((or chicken-script compiling)
+   (main (command-line-arguments)))
+  (else))