You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
99 lines
3.3 KiB
Racket
99 lines
3.3 KiB
Racket
#lang scribble/manual
|
|
|
|
@(require scribble/eval pollen/cache pollen/world (for-label racket (except-in pollen #%module-begin) pollen/render xml pollen/pagetree sugar))
|
|
|
|
@(define my-eval (make-base-eval))
|
|
@(my-eval `(require pollen pollen/template xml))
|
|
|
|
@title{Template}
|
|
|
|
@defmodule[pollen/template]
|
|
|
|
Convenience functions for templates. These are automatically imported into the @racket[eval] environment when rendering with a template (see @racket[render]).
|
|
|
|
This module also provides everything from @racket[sugar/coerce/value].
|
|
|
|
@defproc[
|
|
(->html
|
|
[xexpr xexpr?])
|
|
string?]
|
|
Convert @racket[_xexpr] to an HTML string. Similar to @racket[xexpr->string], but consistent with the HTML spec, text that appears within @code{script} or @code{style} blocks will not be escaped.
|
|
|
|
@examples[#:eval my-eval
|
|
(define tx '(root (script "3 > 2") "Why is 3 > 2?"))
|
|
(xexpr->string tx)
|
|
(->html tx)
|
|
]
|
|
|
|
Be careful not to pass existing HTML strings into this function, because the angle brackets will be escaped. Fine if that's what you want, but you probably don't.
|
|
|
|
@examples[#:eval my-eval
|
|
(define tx '(p "You did" (em "what?")))
|
|
(->html tx)
|
|
(->html (->html tx))
|
|
]
|
|
|
|
@deftogether[(
|
|
|
|
@defproc[
|
|
(select
|
|
[key symbolish?]
|
|
[value-source (or/c hash? txexpr? pagenode? pathish?)])
|
|
(or/c #f txexpr-element?)]
|
|
|
|
@defproc[
|
|
(select*
|
|
[key symbolish?]
|
|
[value-source (or/c hash? txexpr? pagenode? pathish?)])
|
|
(or/c #f (listof txexpr-element?))]
|
|
|
|
)]
|
|
Find matches for @racket[_key] in @racket[_value-source], first by looking in its @code{metas} (using @racket[select-from-metas]) and then by looking in its @code{doc} (using @racket[select-from-doc]). With @racket[select], you get the first result; with @racket[select*], you get them all. In both cases, you get @racket[#f] if there are no matches.
|
|
|
|
|
|
|
|
|
|
@defproc[
|
|
(select-from-metas
|
|
[key symbolish?]
|
|
[meta-source (or/c hash? pagenodeish? pathish?)])
|
|
(or/c #f txexpr-element?)]
|
|
Look up the value of @racket[_key] in @racket[_meta-source]. The @racket[_meta-source] argument can be either a set of metas (i.e., a @racket[hash]) or a @racket[pagenode?], from which metas are pulled. If no value exists for @racket[_key], you get @racket[#f].
|
|
|
|
@examples[#:eval my-eval
|
|
(module ice-cream pollen/markup
|
|
'(div (question "Flavor?")
|
|
(answer "Chocolate chip") (answer "Maple walnut"))
|
|
'(meta ((template "sub.xml.pt")))
|
|
'(meta ((target "print"))))
|
|
(code:comment @#,t{Import doc & metas from 'ice-cream submodule})
|
|
(require 'ice-cream)
|
|
(select-from-metas 'template metas)
|
|
('target . select-from-metas . metas)
|
|
(select-from-metas 'nonexistent-key metas)
|
|
]
|
|
|
|
|
|
|
|
@defproc[
|
|
(select-from-doc
|
|
[key symbolish?]
|
|
[doc-source (or/c txexpr? pagenodeish? pathish?)])
|
|
(or/c #f txexpr-element?)]
|
|
Look up the value of @racket[_key] in @racket[_doc-source]. The @racket[_doc-source] argument can be either be a @code{doc} (i.e., a @racket[txexpr]) or a @racket[pagenode?], from which doc is pulled. If no value exists for @racket[_key], you get @racket[#f].
|
|
|
|
@examples[#:eval my-eval
|
|
(module gelato pollen/markup
|
|
'(div (question "Flavor?")
|
|
(answer "Nocciola") (answer "Pistachio"))
|
|
'(meta ((template "sub.xml.pt")))
|
|
'(meta ((target "print"))))
|
|
(code:comment @#,t{Import doc & metas from 'gelato submodule})
|
|
(require 'gelato)
|
|
(select-from-doc 'question doc)
|
|
('answer . select-from-doc . doc)
|
|
(select-from-doc 'nonexistent-key doc)
|
|
]
|
|
|
|
|