|
|
#lang scribble/manual
|
|
|
|
|
|
@(require scribble/eval pollen/cache pollen/world (for-label racket (except-in pollen #%module-begin) pollen/render txexpr xml pollen/pagetree sugar/coerce pollen/template))
|
|
|
|
|
|
@(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 @racketmodname[sugar/coerce].
|
|
|
|
|
|
@defproc[
|
|
|
(->html
|
|
|
[xexpr xexpr?]
|
|
|
[#:tag html-tag (or/c #f txexpr-tag?) #f]
|
|
|
[#:attrs html-attrs (or/c #f txexpr-attrs?) #f]
|
|
|
[#:splice splice-html? boolean? #f])
|
|
|
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)
|
|
|
]
|
|
|
|
|
|
The optional keyword arguments @racket[_html-tag] and @racket[_html-attrs] let you set the outer tag and attributes for the generated HTML. If @racket[_xexpr] already has an outer tag or attributes, they will be replaced.
|
|
|
|
|
|
@examples[#:eval my-eval
|
|
|
(define tx '(root ((id "huff")) "Bunk beds"))
|
|
|
(->html tx)
|
|
|
(->html tx #:tag 'div)
|
|
|
(->html tx #:attrs '((id "doback")))
|
|
|
(->html tx #:tag 'div #:attrs '((id "doback")))
|
|
|
]
|
|
|
|
|
|
Whereas if @racket[_xexpr] has no tag or attributes, they will be added. If you supply attributes without a tag, you'll get an error.
|
|
|
|
|
|
@examples[#:eval my-eval
|
|
|
(define x "Drum kit")
|
|
|
(->html x)
|
|
|
(->html x #:tag 'div)
|
|
|
(->html x #:tag 'div #:attrs '((id "doback")))
|
|
|
(->html x #:attrs '((id "doback")))
|
|
|
]
|
|
|
|
|
|
|
|
|
If the generated HTML has an outer tag, the @racket[_splice-html?] option will strip it off. Otherwise this option has no effect.
|
|
|
|
|
|
@examples[#:eval my-eval
|
|
|
(define tx '(root (p "Chicken nuggets")))
|
|
|
(->html tx)
|
|
|
(->html tx #:splice #t)
|
|
|
(define x "Fancy sauce")
|
|
|
(->html x)
|
|
|
(code:comment @#,t{This next one won't do anything})
|
|
|
(->html x #:splice #t)
|
|
|
(code:comment @#,t{Adds the outer tag, but then #:splice removes it})
|
|
|
(->html x #:tag 'div #:attrs '((id "doback")) #:splice #t)
|
|
|
]
|
|
|
|
|
|
|
|
|
|
|
|
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? (listof 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]. The @racket[_value-source] can be 1) a hashtable of @racket[metas], 2) a tagged X-expression representing a @racket[doc], or 3) a pagenode or path that identifies a source file that provides @racket[metas] and @racket[doc]. In that case, first look for @racket[_key] in @code{metas} (using @racket[select-from-metas]) and then in @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 1) a hashtable representing @racket[metas] or 2) a pagenode or source path that identifies a source file that provides @racket[metas]. 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 (listof txexpr-element?))]
|
|
|
Look up the value of @racket[_key] in @racket[_doc-source]. The @racket[_doc-source] argument can be either 1) a tagged X-expression representing a @racket[doc] or 2) a pagenode or source path that identifies a source file that provides @racket[doc]. 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)
|
|
|
]
|
|
|
|
|
|
@defproc[
|
|
|
(when/block
|
|
|
[condition any/c]
|
|
|
[text-to-insert any/c])
|
|
|
string?]
|
|
|
Convenience function for templates that's simpler to use than plain @racket[when]. If @racket[_condition] is true, then put the @racket[_text-to-insert] into the template at the current location. Within a template file, usually invoked like so:
|
|
|
|
|
|
@verbatim{◊when/block[@racketvarfont{condition}]{The text to insert.}}
|
|
|
|
|
|
The inserted text can contain its own nested Pollen commands.
|
|
|
|