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pollen/pollen/private/main-base.rkt

55 lines
4.3 KiB
Racket

11 years ago
#lang racket/base
(require (for-syntax racket/base syntax/strip-context racket/syntax "../world.rkt" "split-metas.rkt")
"to-string.rkt" "../pagetree.rkt" "splice.rkt" "../world.rkt") ; need world here to resolve PARSER-MODE-ARG
(provide (all-defined-out))
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(define-syntax-rule (define+provide-module-begin-in-mode PARSER-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 ()
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[(_ EXPR (... ...))
(let-values ([(meta-hash expr-without-metas) (split-metas (syntax->datum #'(EXPR (... ...))) (world:current-define-meta-name))])
(with-syntax ([META-HASH (datum->syntax #'(EXPR (... ...)) meta-hash)]
[(EXPR-WITHOUT-METAS (... ...)) (datum->syntax #'(EXPR (... ...)) expr-without-metas)]
[METAS (format-id #'(EXPR (... ...)) "~a" (world:current-meta-export))]
[META-MOD (format-symbol "~a" (world:current-meta-export))]
[ROOT (format-id #'(EXPR (... ...)) "~a" (world:current-main-root-node))]
[NEWLINE (datum->syntax #'(EXPR (... ...)) (world:current-newline))]
[MODE-PAGETREE (datum->syntax #'(EXPR (... ...)) world:mode-pagetree)]
[MODE-MARKUP (datum->syntax #'(EXPR (... ...)) world:mode-markup)]
[MODE-MARKDOWN (datum->syntax #'(EXPR (... ...)) world:mode-markdown)]
[SPLICING_TAG (datum->syntax #'(EXPR (... ...)) (world:current-splicing-tag))]
[DOC (format-id #'(EXPR (... ...)) "~a" (world:current-main-export))]
[DOC-RAW (generate-temporary 'pollen-)]); prevents conflicts with other imported Pollen sources
(replace-context #'(EXPR (... ...))
#'(#%module-begin
(module META-MOD racket/base
(provide METAS)
(define METAS META-HASH))
(module inner pollen/private/doclang-raw
DOC-RAW ; positional arg for doclang-raw that sets name of export.
(require pollen/top pollen/world pollen/core)
(require (submod ".." META-MOD))
(provide (all-defined-out) #%top (all-from-out (submod ".." META-MOD) pollen/core))
EXPR-WITHOUT-METAS (... ...))
(require 'inner)
(define DOC
(let* ([parser-mode-undefined? (procedure? inner:parser-mode)] ; if undefined, #%top makes it a procedure
[parser-mode (if parser-mode-undefined? PARSER-MODE-ARG inner:parser-mode)]
[proc (cond
[(eq? parser-mode 'MODE-PAGETREE) decode-pagetree]
[(eq? parser-mode 'MODE-MARKUP) (λ(xs) (apply ROOT xs))] ; if `root` undefined, it becomes a default tag function
[(eq? parser-mode 'MODE-MARKDOWN)
(λ(xs) (apply ROOT ((dynamic-require 'markdown 'parse-markdown) (apply string-append (map to-string xs)))))]
[else (λ(xs) (apply string-append (map to-string xs)))])] ; string output for preprocessor
;; drop leading newlines, as they're often the result of `defines` and `requires`
[doc-elements (or (memf (λ(ln) (not (equal? ln NEWLINE))) DOC-RAW) null)]
[doc-elements-spliced (splice doc-elements 'SPLICING_TAG)])
(proc doc-elements-spliced)))
(provide DOC METAS (except-out (all-from-out 'inner) DOC-RAW #%top))))))])))) ; hide internal exports