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pollen/main-base.rkt

41 lines
2.4 KiB
Racket

#lang racket/base
(require (for-syntax racket/base racket/syntax pollen/world) pollen/decode pollen/pagetree racket/list pollen/world markdown)
(provide (all-defined-out) (all-from-out pollen/world))
(define-syntax-rule (define+provide-module-begin-in-mode MODE-ARG)
(begin
(provide (except-out (all-from-out racket/base) #%module-begin)
(rename-out [pollen-module-begin #%module-begin]))
(define-syntax (pollen-module-begin stx)
(syntax-case stx ()
[(_ EXPR (... ...))
(with-syntax ([DOC (datum->syntax stx (world:current-main-export))]
[INNER (datum->syntax stx ''inner)])
#'(#%module-begin
(module inner pollen/doclang-raw ; exports result as doc-raw
(require pollen/top pollen/world)
(provide #%top (all-defined-out) (all-from-out pollen/world))
EXPR (... ...))
(require INNER 'inner) ; import inner twice: INNER for external use, 'inner for internal
(define DOC
(let* ([parser-mode-undefined? (procedure? inner:parser-mode)] ; if undefined, #%top makes it a procedure
[parser-mode (if parser-mode-undefined?
MODE-ARG
inner:parser-mode)]
[proc (cond
[(eq? parser-mode world:mode-pagetree) (λ xs (decode-pagetree xs))]
[(eq? parser-mode world:mode-markup) root] ; if `root` undefined, it becomes a default tag function
[(eq? parser-mode world:mode-markdown)
(λ xs (apply root (apply (compose1 parse-markdown string-append)
(map to-string xs))))]
[else ; for preprocessor output, just make a string
(λ xs (apply string-append (map to-string xs)))])]
[doc-elements (if (list? doc-raw) ; discard all newlines at front of multi-line file
(dropf doc-raw (λ(ln) (equal? ln "\n")))
doc-raw)]) ; single line
(apply proc doc-elements)))
(provide DOC (except-out (all-from-out INNER) doc-raw #%top))))])))) ; hide internal exports