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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
tabset
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)))))
;; Generates a button or button-like link.
(define* (btn key: onclick href (class '())
allow-other-keys:
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 ((body #f))
`(,(cond [href 'a]
[else 'button])
(@ (class ,(string-join (cons "btn" class) " "))
,@(cond [onclick `((onclick ,onclick))]
[href `((href ,href))]
[else '()])
,@(let loop ((rem args))
(cond
[(null? rem) '()]
[(memv (car rem) '(onclick: href: class:))
(loop (cddr rem))]
[(keyword? (car rem))
(cons* `(,(keyword->symbol (car rem))
,(cadr rem))
(loop (cddr rem)))]
[else
(set! body (car rem))
(loop (cdr rem))])))
,body)))
;; Creates a group of tabs from a given specification. The specification
;; @var{elements} should be a list, where each element is a sublist on
;; the form
;; @example
;; ("tab icon" arguments ... tab-body)
;; @end example
;; where arguments are zero or more pairs of keyword arguments. For example:
;; @example
;; ("📅" title: "Översikt" ,(fmt-single-event ev))
;; @end example
;; Creates a tab with an calendar emoji as icon, "Översikt" is sent as the
;; extra argument #:title, and the body is the return from fmt-single-event.
(define (tabset elements)
(define tabgroup (symbol->string (gensym "tabgroup")))
`(div (@ (class "tabgroup"))
,@(for (i (key args ... body)) in (enumerate elements)
(define id (symbol->string (gensym "tab")))
`(div (@ (class "tab"))
(input (@ (type "radio") (id ,id) (name ,tabgroup)
,@(when (zero? i) '((checked)))))
;; It would be preferable to place the labels in a separate
;; div and set that to have fixed position, since we could
;; then just flow them. That hovever doesn't work since we
;; need a css-selector for the label to the selected radio
;; option.
(label (@ ,@(assq-merge `((for ,id)
(style "top: calc(var(--tab-size) * " ,i ")"))
(kvlist->assq args)))
,key)
(div (@ (class "content")) ,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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