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161 lines
7.0 KiB
Racket
161 lines
7.0 KiB
Racket
#lang racket/base
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(require (for-syntax racket/base))
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(require racket/string xml xml/path sugar/define sugar/container sugar/coerce sugar/test)
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(require "file.rkt" txexpr "world.rkt" "cache.rkt" "pagetree.rkt" "debug.rkt")
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(provide (all-from-out sugar/coerce))
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(define/contract+provide (metas->here metas)
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(hash? . -> . pagenode?)
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(path->pagenode (or (select-from-metas (world:current-here-path-key) metas) 'unknown)))
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(define+provide (pagenode->path pagenode)
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(build-path (world:current-project-root) (symbol->string pagenode)))
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(define+provide/contract (select key value-source)
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(coerce/symbol? (or/c hash? txexpr? pagenode? pathish?) . -> . (or/c #f txexpr-element?))
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;; of value-source is specfically 'metas or 'doc,
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;; restrict the search to there.
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;; otherwise look in metas, then in doc for key
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(define (do-doc-result)
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(define doc-result (select-from-doc key value-source))
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(and doc-result (car doc-result)))
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(cond
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[(or (hash? value-source) (equal? value-source (world:current-meta-export))) (select-from-metas key value-source)]
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[(equal? value-source (world:current-main-export)) (do-doc-result)]
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[else
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(define metas-result (and (not (txexpr? value-source)) (select-from-metas key value-source)))
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(or metas-result (do-doc-result))]))
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(module-test-external
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(check-equal? (select 'key '#hash((key . "value"))) "value")
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(check-false (select 'absent-key '#hash((key . "value"))))
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(check-equal? (select 'key '(root (key "value"))) "value")
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(check-false (select 'absent-key '(root (key "value"))))
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(let ([metas '#hash((key . "value"))])
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(check-equal? (select 'key metas) "value")
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(check-false (select 'absent-key metas)))
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(let ([doc '(root (key "value"))])
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(check-equal? (select 'key doc) "value")
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(check-false (select 'absent-key doc))))
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(define+provide/contract (select* key value-source)
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(coerce/symbol? (or/c hash? txexpr? pagenode? pathish?) . -> . (or/c #f txexpr-elements?))
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(define metas-result (and (not (txexpr? value-source)) (select-from-metas key value-source)))
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(define doc-result (select-from-doc key value-source))
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(define result (append (or (and metas-result (list metas-result)) null) (or doc-result null)))
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(and (not (null? result)) result))
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(define+provide/contract (select-from-metas key metas-source)
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(coerce/symbol? (or/c hash? pagenode? pathish?) . -> . (or/c #f txexpr-element?))
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(define metas (cond
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[(hash? metas-source) metas-source]
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[else (get-metas metas-source)]))
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(and (hash-has-key? metas key) (hash-ref metas key)))
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(module-test-external
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(let ([metas '#hash((key . "value"))])
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(check-equal? (select-from-metas 'key metas) "value")
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(check-false (select-from-metas 'absent-key metas))))
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(define+provide/contract (select-from-doc key doc-source)
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(coerce/symbol? (or/c txexpr? pagenode? pathish?) . -> . (or/c #f txexpr-elements?))
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(define doc (cond
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[(txexpr? doc-source) doc-source]
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[else (get-doc doc-source)]))
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(define result (se-path*/list (list key) doc))
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(and (not (null? result)) result))
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(module-test-external
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(check-equal? (select-from-doc 'key '(root (key "value"))) '("value"))
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(check-false (select-from-doc 'absent-key '(root (key "value"))))
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(let ([doc '(root (key "value"))])
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(check-equal? (select-from-doc 'key doc) '("value"))
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(check-false (select-from-doc 'absent-key doc))))
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(define+provide/contract (get-metas pagenode-or-path)
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((or/c pagenode? pathish?) . -> . hash?)
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(define source-path (->source-path (cond
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[(pagenode? pagenode-or-path) (pagenode->path pagenode-or-path)]
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[else pagenode-or-path])))
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(if source-path
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(cached-require source-path (world:current-meta-export))
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(error (format "get-metas: no source found for '~a' in directory ~a" pagenode-or-path (current-directory)))))
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(define+provide/contract (get-doc pagenode-or-path)
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((or/c pagenode? pathish?) . -> . (or/c txexpr? string?))
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(define source-path (->source-path (cond
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[(pagenode? pagenode-or-path) (pagenode->path pagenode-or-path)]
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[else pagenode-or-path])))
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(if source-path
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(cached-require source-path (world:current-main-export))
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(error (format "get-doc: no source found for '~a' in directory ~a" pagenode-or-path (current-directory)))))
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(define (trim-outer-tag html)
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(define matches (regexp-match #px"<.*?>(.*)</.*?>" html))
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(define paren-match (cadr matches))
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paren-match)
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(define placeholder-tag (gensym))
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(define+provide/contract (->html x-in #:tag [tag #f] #:attrs [attrs #f] #:splice [splice? #f])
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(((or/c xexpr? (listof xexpr?))) (#:tag (or/c #f txexpr-tag?) #:attrs (or/c #f txexpr-attrs?) #:splice boolean?) . ->* . string?)
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(define x (cond
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[(txexpr? x-in) x-in]
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[(list? x-in) (cons 'html x-in)]
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[else x-in]))
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(when (and (not (txexpr? x)) attrs (not tag))
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(raise-argument-error '->html "can't use attribute list without a #:tag argument" tag))
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(if (or tag (txexpr? x))
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(let ()
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(define html-tag (or tag (get-tag x)))
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(define html-attrs (or attrs (and (txexpr? x) (get-attrs x)) null))
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(define html-elements (or (and (txexpr? x) (get-elements x)) (list x)))
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(define html (xexpr->html (make-txexpr html-tag html-attrs html-elements)))
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(if (or splice? (and (list? x-in) (not (txexpr? x-in)) (not tag)))
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(trim-outer-tag html)
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html))
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(xexpr->html x)))
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(module-test-external
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(define tx '(root (p "hello")))
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(check-equal? (->html tx) "<root><p>hello</p></root>")
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(check-equal? (->html #:tag 'brennan tx) "<brennan><p>hello</p></brennan>")
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(check-equal? (->html #:attrs '((id "dale")) tx) "<root id=\"dale\"><p>hello</p></root>")
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(check-equal? (->html #:splice #t tx) "<p>hello</p>")
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(check-equal? (->html #:tag 'brennan #:attrs '((id "dale")) tx) "<brennan id=\"dale\"><p>hello</p></brennan>")
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(check-equal? (->html #:tag 'brennan #:attrs '((id "dale")) #:splice #t tx) "<p>hello</p>")
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(define x "hello")
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(check-equal? (->html x) "hello")
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(check-equal? (->html #:tag 'brennan x) "<brennan>hello</brennan>")
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(check-exn exn:fail? (λ() (->html #:attrs '((id "dale")) x) "hello")) ;; won't work without tag
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(check-equal? (->html #:splice #t x) "hello")
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(check-equal? (->html #:tag 'brennan #:attrs '((id "dale")) x) "<brennan id=\"dale\">hello</brennan>")
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(check-equal? (->html #:tag 'brennan #:attrs '((id "dale")) #:splice #t x) "hello")
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(define xs '("hello " (em "you") " " 42))
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(check-equal? (->html xs) "hello <em>you</em> *")
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(check-equal? (->html #:splice #t xs) "hello <em>you</em> *")
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(check-equal? (->html #:tag 'div xs) "<div>hello <em>you</em> *</div>"))
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(provide when/block)
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(define-syntax (when/block stx)
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(syntax-case stx ()
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[(_ condition body ...)
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#'(if condition (string-append*
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(with-handlers ([exn:fail? (λ(exn) (error (format "within when/block, ~a" (exn-message exn))))])
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(map ->string (list body ...))))
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"")]))
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