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(define-module (calp html components)
:use-module (hnh util)
:use-module (ice-9 curried-definitions)
:use-module (ice-9 match)
:use-module (calp translation)
:export (xhtml-doc
slider-input
btn
include-css
include-alt-css
input-plus-minus
))
;; Wraps a number of sxml forms into a valid sxhtml-tree.
(define-syntax xhtml-doc
(syntax-rules (@)
((_ (@ attr ...) body ...)
`(*TOP*
(*PI* xml "version=\"1.0\" encoding=\"utf-8\"")
,(lambda () (format #t "~%<!DOCTYPE html>~%"))
(html (@ (xmlns "http://www.w3.org/1999/xhtml") attr ...)
body ...)))
((_ body ...)
(xhtml-doc (@) body ...))))
;; Add a slider with an associated number input. Keeps the two in sync.
(define* (slider-input key: variable
(min 0)
(max 10)
(step 1)
(value 1)
(unit ""))
`(slider-input
(@ (min ,min)
(max ,max)
(step ,step)
(value ,value)
(oninput
,(format #f "document.documentElement.style.setProperty('--~a', this.value + '~a')"
variable unit)))))
;; Takes a (flat list which may contains keywords followed by items.
;; Return a new list where each of the keyword-value pairs have been removed.
(define (remove-key-values list)
(cond ((null? list) '())
((keyword? (car list)) (remove-key-values (cddr list)))
(else (cons (car list) (remove-key-values (cdr list))))))
;; Generates a button or button-like link.
(define* (btn key: onclick href (class '())
rest: args)
(when (and onclick href)
(scm-error 'wrong-type-arg "btn"
(_ "href and onclick are mutually exclusive. href = ~s, onclick = ~s.")
(list href onclick)
#f))
(let ((classes (string-join (cons "btn" class) " "))
(body (remove-key-values args)))
(cond (href
`(a (@ (class ,classes)
(href ,href))
,@body))
(onclick
`(button (@ (class ,classes)
(onclick ,onclick))
,@body))
(else
`(button (@ (class ,classes))
,@body)))))
(define ((set-attribute attr) el)
(match el
[(tagname ('@ params ...) inner-body ...)
`(,tagname (@ ,@(assq-merge params attr))
,@inner-body)]
[(tagname inner-body ...)
`(,tagname (@ ,attr)
,@inner-body)]))
(define (include-css path . extra-attributes)
`(link (@ (type "text/css")
(rel "stylesheet")
(href ,path)
,@extra-attributes)))
(define (include-alt-css path . extra-attributes)
`(link (@ (type "text/css")
(rel "alternate stylesheet")
(href ,path)
,@extra-attributes)))
(define (input-plus-minus positive?)
(define id (gensym "id"))
`(span (@ (class "input-timespan"))
(input (@ (type "checkbox")
(style "display:none")
(class "plusminuscheck")
,@(if positive? '((checked)) '())
(id ,id)))
(label
(@ (for ,id))
(span (@ (class "plus")) "+")
(span (@ (class "minus")) "-"))))
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