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80 lines
4.0 KiB
Racket
80 lines
4.0 KiB
Racket
#lang racket/base
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(require (for-syntax racket/base racket/syntax "../setup.rkt" "split-metas.rkt")
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"to-string.rkt" "../pagetree.rkt" "splice.rkt" "../setup.rkt")
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(provide (except-out (all-from-out racket/base) #%module-begin)
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(rename-out [dialect-module-begin #%module-begin]))
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;; PARSER-MODE-FROM-READER is used when Pollen is invoked as a specific dialect #lang, and the expander is the generic `pollen/main`.
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;; PARSER-MODE-FROM-EXPANDER is used when Pollen is invoked through an inline submodule,
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;; and the expander is a specific dialect: `pollen/markup`, `pollen/pre`, etc.
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;; they only differ in the `pollen/main` dialect, where the reader infers the dialect from the file extension.
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(define-syntax-rule (dialect-module-begin PARSER-MODE-FROM-EXPANDER READER-SUBMOD)
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(#%module-begin
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(require racket/base)
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(provide (except-out (all-from-out racket/base) #%module-begin)
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(rename-out [pmb #%module-begin]))
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(define-syntax (pmb stx)
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(syntax-case stx ()
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[(_ . EXPRS) (with-syntax ([EXPRS (syntax-property #'EXPRS 'parser-mode-from-expander 'PARSER-MODE-FROM-EXPANDER)])
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#'(pollen-module-begin . EXPRS))]))
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READER-SUBMOD))
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(define (make-parse-proc parser-mode root-proc)
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(define (stringify xs) (apply string-append (map to-string xs)))
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(cond
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[(eq? parser-mode default-mode-pagetree) decode-pagetree]
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[(eq? parser-mode default-mode-markup) (λ (xs) (apply root-proc (remove-voids xs)))]
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[(eq? parser-mode default-mode-markdown)
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(λ (xs) (let* ([xs (stringify xs)]
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[xs ((dynamic-require 'markdown 'parse-markdown) xs)]
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[xs (map strip-empty-attrs xs)])
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(apply root-proc xs)))]
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[else stringify])) ; preprocessor mode
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(define (strip-leading-newlines doc)
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;; drop leading newlines, as they're often the result of `defines` and `requires`
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(or (memf (λ (ln) (not (equal? ln (setup:newline)))) doc) null))
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(define-syntax (pollen-module-begin stx)
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(syntax-case stx ()
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[(_ . EXPRS)
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(let-values ([(meta-hash exprs-without-metas) (split-metas (syntax->datum #'EXPRS) (setup:define-meta-name))])
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(with-syntax (;; 'parser-mode-from-reader will be #f for an inline submodule
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[PARSER-MODE-FROM-READER (syntax-property stx 'parser-mode-from-reader)]
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[PARSER-MODE-FROM-EXPANDER (syntax-property #'EXPRS 'parser-mode-from-expander)]
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[META-HASH meta-hash]
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[EXPRS-WITHOUT-METAS exprs-without-metas]
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[METAS-ID (setup:meta-export)]
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[META-MOD-ID (setup:meta-export)]
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[ROOT-ID (setup:main-root-node)]
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[DOC-ID (setup:main-export)]
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;; prevents conflicts with other imported Pollen sources
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[DOC-RAW (datum->syntax #'here (syntax->datum (generate-temporary 'pollen-)))])
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#'(#%module-begin
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(require pollen/top) ; we could get this via 'inner, but then we'd have to avoid exporting it
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(module META-MOD-ID racket/base
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(provide METAS-ID)
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(define METAS-ID META-HASH))
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(module inner pollen/private/doclang-raw
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DOC-RAW ; positional arg for doclang-raw that sets name of export
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(require pollen/top pollen/core pollen/setup (submod ".." META-MOD-ID))
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(provide (all-defined-out) METAS-ID)
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. EXPRS-WITHOUT-METAS)
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(require 'inner)
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(define DOC-ID
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;; parser-mode must be resolved at runtime, not compile time
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(let* ([parser-mode (or 'PARSER-MODE-FROM-READER PARSER-MODE-FROM-EXPANDER)]
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[proc (make-parse-proc parser-mode ROOT-ID)]
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[doc-elements (strip-leading-newlines DOC-RAW)]
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[doc-elements-spliced (splice doc-elements (setup:splicing-tag))])
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(proc doc-elements-spliced)))
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(provide DOC-ID (except-out (all-from-out 'inner) DOC-RAW)))))]))
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