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(define-module (util options)
:use-module (util)
:use-module (ice-9 match)
:use-module (ice-9 pretty-print)
:use-module (srfi srfi-1)
:use-module ((output text) :select (flow-text)))
;; option-assoc → getopt-valid option-assoc
(define-public (getopt-opt options)
(map (lambda (optline)
(cons (car optline)
(map (lambda (opt-field)
(cons (car opt-field)
(cond [(and (eq? 'value (car opt-field))
(symbol? (cadr opt-field)))
'(optional)]
[else (cdr opt-field)])))
(lset-intersection (lambda (a b) (eqv? b (car a)))
(cdr optline)
'(single-char required? value predicate)))))
options))
;; (name (key value) ...) → sxml
(define (fmt-help option-line)
(let ((name (car option-line))
(args (cdr option-line)))
(let ((valuefmt (case (and=> (assoc-ref args 'value) car)
[(#t) '("=" (i value))]
[(#f) '()]
[else => (lambda (s) `("[=" (i ,s) "]"))])))
`(*TOP* (b "--" ,name) ,@valuefmt
,@(awhen (assoc-ref args 'single-char)
`("," (ws)
(b "-" ,(car it))
,@valuefmt))
(br)
,@(awhen (assoc-ref args 'description)
`((blockquote ,(car it))
(br)))))))
(define (esc . effect)
(format #f "\x1b[~am"
(if (null? effect)
""
(case (car effect)
[(bold) 1]
[(italic) 3]
[(invert) 7]
[else 4]))))
(use-modules (texinfo string-utils))
(define (add-attributes args)
(match-lambda
[(name ('@ tagargs ...) body ...)
`(,name (@ ,@(assq-limit (assq-merge tagargs args)))
,@body)]
[(name body ...)
`(,name (@ ,@args) ,@body)]
[nonlist nonlist]))
(define* (true-string-pad str len optional: (chr #\space))
(let ((strlen ((@@ (output text) true-string-length) str)))
(if (> strlen len)
str
(string-append (make-string (- len strlen) chr) str))))
(define (get-attr args key default)
(aif (assoc-ref args key)
(car it) default))
;; NOTE width is hard coded to 70 chars
(define* (ontree tag body optional: (args '()))
(case tag
[(*TOP* group block) (string-concatenate
(map (compose sxml->ansi-text (add-attributes args))
body))]
[(header) (sxml->ansi-text `(group (center (@ ,@args) (b ,@body)) (br)))]
[(center) (center-string (string-concatenate (map sxml->ansi-text body))
(get-attr args 'width 70))]
[(p) (string-append (string-join (flow-text (string-concatenate (map sxml->ansi-text body))
width: (get-attr args 'width 70))
"\n")
(if (assoc-ref args 'inline) "" "\n\n")
)]
[(b) (string-append (esc 'bold) (string-concatenate (map sxml->ansi-text body)) (esc))]
[(i em) (string-append (esc 'italic) (string-concatenate (map sxml->ansi-text body)) (esc))]
;; NOOP, but for future use.
[(code) (string-concatenate (map sxml->ansi-text body))]
[(blockquote) (string-concatenate
(map (lambda (line) (sxml->ansi-text `(group (ws (@ (minwidth 4))) ,line (br))))
(flow-text
(string-concatenate (map sxml->ansi-text body))
width: 66)))]
[(ws) (make-string (aif (assoc-ref args 'minwidth)
(car it) 1)
#\space)]
[(br) "\n"]
[(hr) (string-append " " (make-string 60 #\_) " \n")]
[(dl)
(let* ((dts dds (partition (lambda (x) (eq? 'dt (car x))) body)))
(let* ((dts* (map sxml->ansi-text dts))
(m (if (null? dts*) 0 (apply max (map (@@ (output text) true-string-length) dts*)))))
(string-concatenate
(map (lambda (dt dd)
(let ((dds (string-split dd #\newline)))
(string-concatenate
(map (lambda (left right)
(string-append (true-string-pad left m) " │ " right "\n"))
(cons dt (map (const "") (iota (1- (length dds)))))
dds))))
dts*
(map (compose sxml->ansi-text (add-attributes `((width ,(- 70 m 5)))))
dds)))))]
[(dt) (string-concatenate (map (compose sxml->ansi-text (add-attributes args))
body))]
[(dd)
(string-concatenate
(map (compose sxml->ansi-text (add-attributes args))
body))]
[(scheme)
(string-concatenate
(map (lambda (form)
(with-output-to-string
(lambda () (pretty-print form width: (aif (assoc-ref args 'width) (car it) 70)))))
body))]
[else (string-append (esc 'bold) "??"
"`"
(esc 'invert)
(string-concatenate (map sxml->ansi-text body))
(esc) "'")]
)
)
(define (onleaf leaf)
(format #f "~a" leaf))
(define (parse-tree tree-callback leaf-callback)
(match-lambda
[(tag ('@ args ...) body ...)
(tree-callback tag body args)]
[(tag body ...)
(tree-callback tag body)
]
[() ""]
[(any ...) (map leaf-callback any)]
[any (leaf-callback any)]))
(define-public (sxml->ansi-text tree)
((parse-tree ontree onleaf) tree))
(define-public (format-arg-help options)
(sxml->ansi-text (cons '*TOP* (map sxml->ansi-text (map fmt-help options)))))
(define*-public (print-arg-help options optional: (port (current-error-port)))
(display (format-arg-help options) port))
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