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Add ansi-color-specifier? and ansi-color-specifier-list #679

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Add ansi-color-specifier? and ansi-color-specifier-list #679

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2 changes: 2 additions & 0 deletions doc/refman/stdproc.adoc
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Original file line number Diff line number Diff line change
Expand Up @@ -987,6 +987,8 @@ See SRFI document for more information.
{{insertdoc 'procedure-source}}
[#ansicolor]
{{insertdoc 'ansi-color}}
{{insertdoc 'ansi-color-specifier-list}}
{{insertdoc 'ansi-color-specifier?}}
{{insertdoc 'disassemble}}
{{insertdoc 'disassemble-expr}}
{{insertdoc 'uri-parse}}
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134 changes: 83 additions & 51 deletions lib/bonus.stk
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Expand Up @@ -44,7 +44,8 @@
call/ec
base64-encode-string base64-decode-string
md5sum-file
ansi-color ansi-color-protect do-color
ansi-color ansi-color-protect
ansi-color-specifier-list ansi-color-specifier? do-color
port->string port->sexp-list port->string-list
print printerr eprintf printf fprintf
declare-new-error
Expand Down Expand Up @@ -1473,14 +1474,34 @@ doc>
* @end lisp
* will display the words BLUE and RED in color.
doc>
<doc EXT ansi-color-specifier-list ansi-color-specifier?
* (ansi-color-specifier-list)
* (ansi-color-specifier? obj)
*
* |Ansi-color-specifier-list| will return a list with all possible symbols
* that work as ANSI color specifier for strings.
* |Ansi-color-specifier?| will return `#t` if `obj` is an ANSI color
* specifier, and `#f` otherwise.
*
* @lisp
* (ansi-color-specifier? 'red) => #t
* (ansi-color-specifier? 'bold) => #t
* (ansi-color-specifier? 2+3i) => #f
* (ansi-color-specifier? #t) => #f
* (ansi-color-specifier? #void) => #f
* (ansi-color-specifier?-list)
* => (normal bold no-bold ... bg-cyan white bg-white)
* @end lisp
doc>
|#
(define ansi-color #f)
(define ansi-color-protect #f)
(define ansi-color #f)
(define ansi-color-protect #f)
(define ansi-color-specifier-list #f)
(define ansi-color-specifier? #f)

(let ((ansi-color-start "\e[")
(ansi-color-stop "m"))

(define (code c)
(let ((alist '((normal . "0")
(bold . "1") (no-bold . "21")
(italic . "2") (no-italic . "22")
Expand All @@ -1495,53 +1516,64 @@ doc>
(magenta . "35") (bg-magenta . "45")
(cyan . "36") (bg-cyan . "46")
(white . "37") (bg-white . "47"))))
(let ((v (assoc c alist)))
(if v (cdr v) ""))))

;; ansi-color-protect ...
(set! ansi-color-protect
(lambda (start stop)
#:ansi-color-protect
(set! ansi-color-start (string-append start "\e["))
(set! ansi-color-stop (string-append "m" stop))))

;; ansi-color ...
(set! ansi-color
(lambda args
#:ansi-color
(let Loop ((args args)
(str-prev? #t)
(res ""))
(cond
((null? args)
(if str-prev?
res
(string-append res ansi-color-stop)))
((string? (car args))
(Loop (cdr args)
#t
(string-append res
(if str-prev? "" ansi-color-stop)
(car args))))
((integer? (car args))
(Loop (cdr args)
#f
(string-append res
(if str-prev? ansi-color-start ";")
(if (positive? (car args))
(format "38;5;~a" (car args))
(format "48;5;~a" (car args))))))
((symbol? (car args))
(Loop (cdr args)
#f
(string-append res
(if str-prev? ansi-color-start ";")
(code (car args)))))
((pair? (car args))
(Loop (append (car args) (cdr args))
str-prev?
res))
(else (error 'ansi-color "bad command ~S" args)))))))
(define (code c)
(let ((v (assoc c alist)))
(if v (cdr v) "")))

(set! ansi-color-specifier-list
(lambda ()
#:ansi-color-specifier-list
(map car alist)))

(set! ansi-color-specifier?
(lambda (obj)
#:ansi-color-specifier?
(if (assq obj alist) #t #f)))

;; ansi-color-protect ...
(set! ansi-color-protect
(lambda (start stop)
#:ansi-color-protect
(set! ansi-color-start (string-append start "\e["))
(set! ansi-color-stop (string-append "m" stop))))

;; ansi-color ...
(set! ansi-color
(lambda args
#:ansi-color
(let Loop ((args args)
(str-prev? #t)
(res ""))
(cond
((null? args)
(if str-prev?
res
(string-append res ansi-color-stop)))
((string? (car args))
(Loop (cdr args)
#t
(string-append res
(if str-prev? "" ansi-color-stop)
(car args))))
((integer? (car args))
(Loop (cdr args)
#f
(string-append res
(if str-prev? ansi-color-start ";")
(if (positive? (car args))
(format "38;5;~a" (car args))
(format "48;5;~a" (car args))))))
((symbol? (car args))
(Loop (cdr args)
#f
(string-append res
(if str-prev? ansi-color-start ";")
(code (car args)))))
((pair? (car args))
(Loop (append (car args) (cdr args))
str-prev?
res))
(else (error 'ansi-color "bad command ~S" args))))))))


(define do-color
Expand Down