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#lang racket/base
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(provide (except-out (all-from-out racket/base) #%module-begin)
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(rename-out [new-module-begin #%module-begin]))
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(define-syntax-rule (new-module-begin body-exprs ...)
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(#%module-begin
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(module inner pollen/lang/doclang-raw
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;; doclang_raw is a version of scribble/doclang with the decoder disabled
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;; first three lines are positional arguments for doclang-raw
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doc-raw ; id of export
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(λ(x) x) ; post-process function
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() ; prepended exprs
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;; Change behavior of undefined identifiers with #%top
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;; Get project values from world
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(require pollen/top pollen/world)
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(provide (all-from-out pollen/top pollen/world))
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;; for anything defined in pollen source file
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(provide (all-defined-out))
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body-exprs ...)
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(require 'inner)
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;; set the parser mode based on reader mode
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(define parser-mode
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(if (equal? reader-mode world:reader-mode-auto)
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(let* ([file-ext-pattern (pregexp "\\w+$")]
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[here-ext (string->symbol (car (regexp-match file-ext-pattern here-path)))])
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(cond
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[(equal? here-ext world:pagemap-source-ext) world:reader-mode-pagemap]
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[(equal? here-ext world:markup-source-ext) world:reader-mode-markup]
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[(equal? here-ext world:markdown-source-ext) world:reader-mode-markdown]
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[else world:reader-mode-preproc]))
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reader-mode))
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;; Split out the metas.
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(require txexpr)
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(define (split-metas-to-hash tx) ; helper function
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;; return tx without metas, and meta hash
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(define is-meta-element? (λ(x) (and (txexpr? x) (equal? 'meta (car x)))))
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(define-values (doc-without-metas meta-elements)
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(splitf-txexpr tx is-meta-element?))
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(define meta-element->assoc (λ(x) (let ([key (car (caadr x))][value (cadr (caadr x))]) (cons key value))))
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(define metas (make-hash (map meta-element->assoc meta-elements)))
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(values doc-without-metas metas))
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(define doc-txexpr
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(let ([doc-raw (if (equal? parser-mode world:reader-mode-markdown)
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(apply (compose1 (dynamic-require 'markdown 'parse-markdown) string-append) doc-raw)
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doc-raw)])
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`(placeholder-root
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,@(cons (meta 'here: here)
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(cons (meta 'here-path: here-path)
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;; cdr strips initial linebreak, but make sure doc-raw isn't blank
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(if (and (list? doc-raw) (> 0 (length doc-raw))) (cdr doc-raw) doc-raw))))))
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(define-values (doc-without-metas metas) (split-metas-to-hash doc-txexpr))
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;; set up the 'doc export
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(require pollen/decode)
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(define doc (apply (cond
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[(equal? parser-mode world:reader-mode-pagemap) (λ xs ((dynamic-require 'pollen/pagemap 'decode-pagemap) xs))]
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;; 'root is the hook for the decoder function.
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;; If it's not a defined identifier, it just hits #%top and becomes `(root ,@body ...)
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[(or (equal? parser-mode world:reader-mode-markup)
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(equal? parser-mode world:reader-mode-markdown)) root]
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;; for preprocessor output, just make a string.
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[else (λ xs (apply string-append (map to-string xs)))])
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(cdr doc-without-metas))) ;; cdr strips placeholder-root tag
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(provide metas doc
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;; hide the exports that were only for internal use.
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(except-out (all-from-out 'inner) doc-raw #%top))
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;; for output in DrRacket
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(module+ main
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(if (equal? parser-mode world:reader-mode-preproc)
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(display doc)
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(print doc)))))
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