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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;;; CSS abbrev:
(defun zencoding-css-split-args (exp)
(zencoding-aif
(string-match "[#0-9$-]" exp)
(cons (substring exp 0 it) (substring exp it))
(list exp)))
(defun zencoding-css-arg-number (input)
(zencoding-parse
"\\(\\(?:-\\|\\)[0-9.]+\\)\\(\\(?:-\\|e\\|p\\|x\\)\\|\\)" 3 "css number arguments"
(cons (list (elt it 1)
(let ((unit (string-to-char (elt it 2))))
(cond ((= unit ?-) "px")
((= unit ?e) "em")
((= unit ?p) "%")
((= unit ?x) "ex")
(t "px"))))
input)))
(defun zencoding-css-arg-color (input)
(zencoding-parse
"#\\([0-9a-fA-F]\\{1,6\\}\\)" 2 "css color argument"
(cons (let* ((n (elt it 1))
(l (length n)))
(concat
"#"
(substring
(cond ((= l 1) (concat (make-list 6 (string-to-char n))))
((= l 2) (concat n n n))
((= l 3) (concat
(loop for c in (string-to-list n)
append (list c c))))
(t (concat n n)))
0 6)))
input)))
(defun zencoding-css-parse-arg (input)
(zencoding-run zencoding-css-arg-number it
(zencoding-run zencoding-css-arg-color it
(if (equal input "")
it
(cons input "")))))
(defun zencoding-css-important-p (input)
(let ((len (length input)))
(and (< 0 len)
(char-equal (aref input (1- len)) ?!))))
(defun zencoding-css-parse-args (args)
(when args
(let ((rt nil))
(loop
(zencoding-pif (zencoding-css-parse-arg args)
(progn (push (car it) rt)
(setf args (cdr it)))
(return (nreverse rt)))))))
(defun zencoding-css-subexpr (exp)
(let* ((importantp (zencoding-css-important-p exp))
(exp (zencoding-css-split-args
(if importantp (subseq exp 0 -1) exp)))
(args (cdr exp)))
(setf (cdr exp) (cons importantp (zencoding-css-parse-args args)))
exp))
(defun zencoding-css-toknize (str)
(let* ((i (split-string str "+"))
(rt nil))
(loop
(let ((f (first i))
(s (second i)))
(if f
(if (and s (or (string= s "") (string-match "^[#0-9$-]" s)))
(progn
(setf rt (cons (concat f "+" s) rt))
(setf i (cddr i)))
(progn
(setf rt (cons f rt))
(setf i (cdr i))))
(return (nreverse rt)))))))
(defun zencoding-css-expr (input)
(mapcar #'zencoding-css-subexpr
(zencoding-css-toknize input)))
(zencoding-defparameter
zencoding-css-snippets
(gethash "snippets" (gethash "css" zencoding-snippets)))
(zencoding-defparameter
zencoding-css-unitless-properties
'("z-index" "line-height" "opacity" "font-weight" "zoom"))
(zencoding-defparameter
zencoding-css-unitless-properties-regex
(concat "^\\(:?" (zencoding-join-string
zencoding-css-unitless-properties "\\|")
"\\):.*$"))
(defun zencoding-css-instantiate-lambda (str)
(flet ((split-string-to-body
(str args-sym)
(let ((rt '(concat)) (idx-max 0))
(loop for i from 0 to 255 do
(zencoding-aif
(string-match "\\(?:|\\|${\\(?:\\([0-9]\\):\\|\\)\\(?:\\(.+?\\)\\|\\)}\\)" str)
(destructuring-bind (mat idx def)
(mapcar (lambda (ref) (match-string ref str)) '(0 1 2))
(setf rt
`((or
(nth ,(let ((cur-idx (if idx (1- (string-to-int idx)) i)))
(setf idx-max (max cur-idx idx-max)))
,args-sym)
,(or def ""))
,(substring str 0 it) ;; ordered to reverse
,@rt))
(setf str (substring str (+ it (length mat)))))
;; don't use nreverse. cause bug in emacs-lisp.
(return (cons idx-max (reverse (cons str rt)))))))))
(let ((args (gensym)))
(destructuring-bind (idx-max . body) (split-string-to-body str args)
(eval
`(lambda (&rest ,args)
(progn
(when (nthcdr ,idx-max ,args)
(setf (nthcdr ,idx-max ,args)
(list (zencoding-join-string
(nthcdr ,idx-max ,args) " "))))
,body)))))))
(defun zencoding-css-transform-exprs (exprs)
(zencoding-join-string
(mapcar
#'(lambda (expr)
(zencoding-aif
(gethash (car expr) zencoding-css-snippets)
(let ((set it) (fn nil) (unitlessp nil))
(if (stringp set)
(progn
;; new pattern
;; creating print function
(setf fn (zencoding-css-instantiate-lambda set))
;; get unitless or no
(setf unitlessp
(not (null (string-match
zencoding-css-unitless-properties-regex set))))
;; caching
(puthash (car expr) (cons fn unitlessp) zencoding-css-snippets))
(progn
;; cache hit.
(setf fn (car set))
(setf unitlessp (cdr set))))
(let ((transformed
(apply fn
(mapcar
#'(lambda (arg)
(if (listp arg)
(if unitlessp (car arg)
(apply #'concat arg))
arg))
(cddr expr)))))
(if (cadr expr)
(concat (subseq transformed 0 -1) " !important;")
transformed)))
(concat (car expr) ":"
(zencoding-join-string
(mapcar #'(lambda (arg)
(if (listp arg) (apply #'concat arg) arg))
(cdr expr)) " ")
";")))
exprs)
"\n"))
(defun zencoding-css-transform (input)
(zencoding-css-transform-exprs (zencoding-css-expr input)))
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