359 lines
11 KiB
Scheme
359 lines
11 KiB
Scheme
(define-record-type wm :wm
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(make-wm type in-channel out-channel internal-out-channel
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dpy window colormap options
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clients current-client)
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wm?
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(type wm:type)
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(in-channel wm:in-channel)
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(out-channel wm:out-channel)
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(internal-out-channel wm:internal-out-channel)
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(dpy wm:dpy)
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(window wm:window)
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(colormap wm:colormap)
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(options wm:options)
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(clients wm:clients set-wm:clients!)
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(current-client wm:current-client set-wm:current-client!))
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(define wm-clients wm:clients)
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(define wm-current-client wm:current-client)
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(define-enumerated-type manager-type :manager-type
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manager-type? manager-types manager-type-name manager-type-index
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(split switch move))
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(define (manager-name type)
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(cond
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((eq? type (manager-type split)) "split-wm")
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((eq? type (manager-type switch)) "switch-wm")
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((eq? type (manager-type move)) "move-wm")))
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(define focus-policy '(enter click)) ;; TODO: -> options
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(define (create-wm dpy parent options children
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type options-spec out-channel fun)
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(let* ((wa (get-window-attributes dpy parent))
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(main-window
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(create-simple-window dpy parent 0 0 (window-attribute:width wa)
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(window-attribute:height wa)
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0 (white-pixel dpy) (black-pixel dpy)))
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(colormap (create-colormap dpy main-window
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(window-attribute:visual wa)
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(colormap-alloc none)))
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(in-channel (make-channel))
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(internal-out-channel (make-channel))
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(wm (make-wm type in-channel out-channel internal-out-channel
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dpy main-window colormap
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(create-options dpy colormap options-spec options)
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'() #f)))
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;; set properties ************************************************
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(set-wm-name! dpy main-window
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(string-list->property (list (manager-name type))))
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;; icon ??
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;; size-hints ??
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(set-wm-hints! dpy main-window
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(make-wm-hint-alist (input? #t)))
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;; class-hint ??
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(set-wm-protocols! dpy main-window
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(list (intern-atom dpy "WM_TAKE_FOCUS" #t)))
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;; TODO: Colormaps
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;; spawn handlers ************************************************
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(spawn* (lambda (release)
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(call-with-event-channel
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(wm:dpy wm) (wm:window wm)
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(event-mask structure-notify
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enter-window
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focus-change
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exposure)
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(lambda (event-channel)
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(call-with-current-continuation
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(lambda (exit)
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(release)
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(send internal-out-channel '(fit-windows)) ;; ??
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(let loop ()
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(select*
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(wrap (receive-rv event-channel)
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(lambda (xevent)
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(handle-xevent wm exit xevent)))
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(wrap (receive-rv (wm:in-channel wm))
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(lambda (msg)
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(handle-external-message wm exit msg))))
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(loop))))))
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(free-colormap dpy colormap)))
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(for-each (lambda (window)
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(wm-manage-window wm window))
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children)
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(fun wm internal-out-channel)))
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(define (handle-xevent wm exit xevent)
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(let ((main-window (wm:window wm))
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(dpy (wm:dpy wm))
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(internal-out-channel (wm:internal-out-channel wm))
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(type (any-event-type xevent)))
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(cond
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((expose-event? xevent)
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(send internal-out-channel '(draw-main-window)))
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((configure-event? xevent)
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(send internal-out-channel '(fit-windows)))
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;; the manager got the focus (as a client)
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((client-message-event? xevent)
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(let* ((p (client-message-event-property xevent))
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(type (property:type p)))
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(if (equal? type (intern-atom dpy "WM_PROTOCOLS" #t))
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(let ((name (car (property:data p)))
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(time (cadr (property:data p)))
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(client (wm:current-client wm)))
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(if (and client
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(equal? name (intern-atom dpy "WM_TAKE_FOCUS" #t)))
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(handle-external-message wm exit
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(list 'select-client client time)))
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))))
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)))
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(define (handle-external-message wm exit msg)
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(let ((internal-out-channel (wm:internal-out-channel wm))
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(dpy (wm:dpy wm)))
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(case (car msg)
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((manage-window)
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(let* ((window (second msg))
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(client (create-client wm window)))
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(set-wm:clients! wm (cons client (wm:clients wm)))
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(send internal-out-channel
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(list 'init-client client (third msg)))
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(send internal-out-channel (list 'fit-client client))
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;; sync ??
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(map-window dpy window)
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(send internal-out-channel (list 'update-client-state client))))
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((unmanage-window)
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(let* ((window (second msg))
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(client (find (lambda (c)
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(eq? window (client:window c)))
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(wm:clients wm))))
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(if client
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(begin
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(reparent-to-root dpy window)
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(handle-external-message wm exit
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(list 'deinit-client client))))))
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((destroy-manager)
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;; (send internal-out-channel '(deinit-manager))
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;; sync ??
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(destroy-window dpy (wm:window wm)))
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((deinit-client)
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(let ((client (second msg)))
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(set-wm:clients! wm (filter (lambda (c) (not (eq? c client)))
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(wm:clients wm)))
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(if (eq? (wm:current-client wm) client)
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(set-wm:current-client! wm #f)) ;; select another ??
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(send (wm:internal-out-channel wm) (list 'deinit-client client))
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;; sync ??
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(destroy-window dpy (client:client-window client))))
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((select-client)
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(let ((client (second msg))
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(time (third msg)))
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(set-wm:current-client! wm client)
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(raise-window dpy (client:client-window client))
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(take-focus dpy (client:window client) time)
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; (for-each (lambda (c)
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; (if (not (eq? c client))
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; (grab-button dpy
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; (button button1) (state-set)
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; (client:client-window c) #f
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; (event-mask button-press)
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; (grab-mode async) (grab-mode async)
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; none none)))
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; (wm:clients wm))
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))
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)))
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(define (wm-deinit-client wm client)
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(mdisplay "manager deinit-client\n")
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(send (wm:in-channel wm) (list 'deinit-client client)))
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;; *** external messages *********************************************
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(define (wm-manage-window wm window . rect)
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(send (wm:in-channel wm)
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(list 'manage-window window
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(if (null? rect)
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#f
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(car rect))))
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;; sync ??
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)
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(define (wm-unmanage-window wm window)
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(send (wm:in-channel wm) (list 'unmanage-window window)))
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(define (wm-select-client wm client time)
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(send (wm:in-channel wm) (list 'select-client client time)))
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(define (destroy-wm wm)
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(send (wm:in-channel wm) '(destroy-manager)))
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(define (send-root-drop wm window x y)
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(send (wm:out-channel wm) (list 'root-drop window x y)))
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;; *** client ********************************************************
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(define-record-type client :client
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(make-client window client-window data)
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client?
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(window client:window)
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(client-window client:client-window)
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(data client:data set-client:data!))
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(define (create-client wm window)
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(mdisplay "creating client for " window "\n")
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(let* ((dpy (wm:dpy wm))
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(client-window (create-simple-window dpy (wm:window wm)
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0 0
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(window-width dpy window)
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(window-height dpy window)
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0
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(white-pixel dpy)
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(black-pixel dpy)))
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(client (make-client window client-window #f)))
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(reparent-window dpy window client-window 0 0)
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(create-client-handler wm client)
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client))
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(define (create-client-handler wm client)
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(spawn*
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(lambda (release)
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(call-with-event-channel
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(wm:dpy wm) (client:client-window client)
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(event-mask exposure
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enter-window
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button-press
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structure-notify
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focus-change)
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(lambda (client-window-channel)
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(call-with-event-channel
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(wm:dpy wm) (client:window client)
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(event-mask property-change
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structure-notify)
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(lambda (client-channel)
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(call-with-current-continuation
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(lambda (exit)
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(release)
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(let loop ()
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(select*
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(wrap (receive-rv client-window-channel)
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(lambda (xevent)
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(handle-client-window-xevent wm exit client xevent)))
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(wrap (receive-rv client-channel)
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(lambda (xevent)
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(handle-client-xevent wm exit client xevent))))
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(loop)))))))))))
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(define (handle-client-window-xevent wm exit client xevent)
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(let ((type (any-event-type xevent))
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(internal-out-channel (wm:internal-out-channel wm))
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(dpy (wm:dpy wm)))
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(cond
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((expose-event? xevent)
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(send internal-out-channel
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(list 'draw-client-window client)))
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((configure-event? xevent)
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(send internal-out-channel
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(list 'fit-client client)))
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((or (focus-change-event? xevent) (circulate-event? xevent))
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;; TODO: look at mode? or maybe only look at focus-in of the
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;; client, because the client-window never gets the focus
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;; anyway.
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(if (window-exists? dpy (client:window client)) ;; TODO: not perfect
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(send internal-out-channel
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(list 'update-client-state client))))
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((eq? (event-type enter-notify) type)
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(if (memq 'enter focus-policy)
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(wm-select-client wm client (crossing-event-time xevent))))
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((eq? (event-type button-press) type)
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(if (memq 'click focus-policy)
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(wm-select-client wm client (button-event-time xevent))))
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((destroy-window-event? xevent)
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(mdisplay "client-window destroyed\n")
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(exit)))))
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(define (handle-client-xevent wm exit client xevent)
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(let ((type (any-event-type xevent))
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(internal-out-channel (wm:internal-out-channel wm))
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(dpy (wm:dpy wm)))
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(cond
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((property-event? xevent)
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(let ((name (get-atom-name (property-event-display xevent)
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(property-event-atom xevent))))
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(cond
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((equal? "WM_NAME" name)
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(send internal-out-channel
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(list 'update-client-state client)))
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;; TODO: respect NORMAL_HINTS change
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)))
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((configure-event? xevent)
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;; TODO: we have to prevent this event if changed the size on our own.
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;; --> XReconfigureWMWindow ??
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;;(send internal-out-channel (list 'fit-client-window client))
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#t)
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((reparent-event? xevent) #t)
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; (if (or (not (window-exists? dpy (client:window client)))
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; (not (eq? (client:client-window client)
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; (window-parent dpy (client:window client)))))
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; (begin
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; (mdisplay "manager " (wm:type wm) " reparented client\n")
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; (wm-deinit-client wm client)
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; (exit)))
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;; TODO: withdrawn-state etc.
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((destroy-window-event? xevent)
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(mdisplay "destroy-window client\n")
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(wm-deinit-client wm client)
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(exit))
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)))
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;; *** client names **************************************************
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(define client-name
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(let ((names '()) ;; (window oname name)
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(lock (make-lock)))
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(lambda (dpy client)
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(let* ((w (client:window client))
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(cname (let* ((p (get-wm-name dpy w))
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(l (if p (property->string-list p) '())))
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(if (null? l)
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"<untitled>"
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(car l)))))
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(with-lock lock
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(lambda ()
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(let ((name? (let ((p (assq w names)))
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(and p (equal? (cadr p) cname)
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(caddr p)))))
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(set! names
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(filter (lambda (e)
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(and (not (eq? (car e) w))
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(window-exists? dpy (car e))))
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names))
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(let ((name (if name? name?
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(unique-name cname
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(map caddr names)))))
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(set! names (cons (list w cname name) names))
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name))))))))
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(define (unique-name name names)
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(if (not (member name names))
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name
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(let loop ((i 1))
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(let ((n (string-append name "<" (number->string i) ">")))
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(if (member n names)
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(loop (+ i 1))
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n)))))
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