./lisp/readability.txt

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;; This module provides a general mechanism for setting properties on
;; matched windows as they're created. It removes much of the need for
;; manually creating functions to put in before-add-window-hook.

;; For example, doing:

;;	(add-window-matcher 'WM_CLASS "Term" '(place-mode . interactive))

;; makes all terminal windows be placed interactively. Or even better:

;;	(add-window-matcher 'WM_CLASS "Netscape/Navigator"
;;			    '(ignore-program-position . t))

;; makes netscape windows a lot easier to live with.


  ;; List of (MATCH-ELTS . ACTION-ELTS)
  ;; Each MATCH-ELT is (PROP . REGEXP or NUMBER or SYMBOL)
  ;; Each ACTION-ELT is (PROP . VALUE)
  (defcustom match-window-profile nil
    nil
    :type match-window
    :group match-window
    :require sawfish.wm.ext.match-window)


;; (Sawfish match-window.jl)

  (define (add-window-matcher prop value #!rest actions)
    (catch 'out
      (let
	  ((pair (cons prop value))
	   (add-to (lambda (slot)
		     (mapc (lambda (action)
			     (let
				 ((tem (assq (car action) (cdr slot))))
			       (if tem
				   (rplacd tem (cdr action))
				 (rplacd slot (cons action (cdr slot))))))
			   actions))))
	;; does the list already contain a (PROP . VALUE) pair?
	(mapc (lambda (cell)
		(when (member pair (car cell))
		  (add-to cell)
		  (throw 'out t)))
	      match-window-profile)
	;; no
	(setq match-window-profile (cons (list (cons pair nil))
					 match-window-profile))
	(add-to (car match-window-profile)))))



# 1-to-1 translation (admittedly, the structure of the original code's
#   "match-window-profile" appears to be exceptionally stupid)

%match_window_profile = (
   [[WM_CLASS, "Term"], [WND_TITLE, "MyApp"]] => [[ignore-program-position, 1], [foo,42]],
   [[WM_CLASS, "Lalala"]] => [[ignore-program-position, 0]],
   [[WND_TITLE, "Netscape"], ] => [[sticky,1], [cyclable,0]],
);

sub add_window_matcher {
    my ($prop, $value, @actions) = @_;
    #....
}


################

# sane translation

#%match_window_profile = (
#   [WM_CLASS, "Term"] => $VAR1={ignore-program-position=>1, foo=>42},
#   [WND_TITLE, "MyApp"] => $VAR1,
#   [WM_CLASS, "Lalala"] => {ignore-program-position=>0},
#   [WND_TITLE, "Netscape"] => {sticky=>1, cyclable=>0},
#);

sub add_window_matcher {
    my ($prop, $value, %actions) = @_;
    foreach my $k (keys %actions) {
        $match_window_profile{[$prop,$value]}->{$k} = $actions{$k};
    };
}
## doesn't work -- arrays as hash keys don't work...
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