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;; -------------------------------------------------------------------------
;; Provides functions for displaying content in HTML templates.
(require pollen/core
pollen/template
pollen/decode
racket/string
racket/function
racket/list
txexpr
openssl/sha1
"dust.rkt")
(provide html$-page-head
html$-page-body-open
html$-article-open
html$-article-close
html$-article-listing-short
html$-page-body-close
html$-note-title
html$-note-contents
html$-note-listing-full
html$-note-in-article
html$-notes-section)
html$-notes-section
html$-paginate-navlinks)
(define (html$-page-head [title #f])
◊string-append{<head>
<title>◊if[title title ""] </title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" type="text/css" href="/web-extra/martin.css">
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</div>})
(define (html$-notes-section note-htmls)
◊string-append{<div class="further-notes" id="furthernotes">
<h2>Further Notes</h2>
◊(apply string-append note-htmls)
</div>})
;; (private) Returns HTML for a list-item link to a particular page in a set of numbered pages
(define (html$-paginate-link basename pagenum [linktext (format "p. ~a" (number->string pagenum))] [class ""])
(define cstr (if (non-empty-string? class) (format " class=\"~a\"" class) ""))
(format "<li~a><a href=\"/~a-pg~a.html\">~a</a></li>" cstr basename pagenum linktext))
;; Returns HTML for a series of list items with links to numbered pages
(define (html$-paginate-navlinks pagenum pagecount basename)
(define slots 9)
(define on-first-group? (<= pagenum (- slots 4)))
(define on-last-group? (>= pagenum (- pagecount slots -4)))
(define only-one-group? (<= pagecount slots))
(define group-start (- pagenum (quotient (- slots 4) 2))) ; not always used!
(define page-func (curry html$-paginate-link basename))
(define page-group-syms
(cond [only-one-group?
`(,@(range 1 (+ 1 pagecount)))]
[on-first-group?
`(,@(range 1 (min (+ 1 pagecount) (- slots 1))) "..." ,pagecount)]
[on-last-group?
`(1 "..." ,@(range (- pagecount slots -3) (+ pagecount 1)))]
[else
`(1
"..."
,@(range group-start (min (+ 1 pagecount) (+ group-start (- slots 4))))
"..."
,pagecount)]))
(define page-group
(for/list ([psym (in-list page-group-syms)])
(cond
[(and (number? psym) (equal? psym pagenum))
(format "<li class=\"current-page\">~a</li>" psym)]
[(number? psym) (page-func psym)]
[else "<li>…</li>"])))
(define prev-link
(if (eq? 1 pagenum)
"<li class=\"nav-text inactive-link\">←Newer</li>"
(page-func (- pagenum 1) "← Newer" "nav-text")))
(define next-link
(if (eq? pagecount pagenum)
"<li class=\"nav-text inactive-link\">Older→</li>"
(page-func (+ pagenum 1) "Older →" "nav-text")))
(string-join `(,prev-link ,@page-group ,next-link)))
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