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141 lines
5.2 KiB
Racket
141 lines
5.2 KiB
Racket
#lang racket/base
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(require racket/path racket/bool)
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(require "tools.rkt" "world.rkt" "decode.rkt" sugar txexpr "cache.rkt")
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(define+provide (pnode? x)
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(->boolean (try (not (whitespace? (->string x)))
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(except [exn:fail? (λ(e) #f)]))))
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(define+provide/contract (pnode?/error x)
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(any/c . -> . boolean?)
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(or (pnode? x) (error "Not a valid pnode:" x)))
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(define+provide (ptree? x)
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(->boolean (and (txexpr? x) (andmap (λ(i) (or (pnode? i) (ptree? i))) x))))
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(define+provide/contract (file->ptree p)
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(pathish? . -> . ptree?)
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(cached-require (->path p) world:main-pollen-export))
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(define+provide/contract (directory->ptree dir)
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(directory-pathish? . -> . ptree?)
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(let ([files (map remove-ext (filter (λ(x) (has-ext? x world:markup-source-ext)) (directory-list dir)))])
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(ptree-root->ptree (cons world:ptree-root-node files))))
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;; Try loading from ptree file, or failing that, synthesize ptree.
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(define+provide/contract (make-project-ptree project-dir)
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(directory-pathish? . -> . ptree?)
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(define ptree-source (build-path project-dir world:default-ptree))
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(cached-require ptree-source world:main-pollen-export))
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(define+provide/contract (parent pnode [ptree (current-ptree)])
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(((or/c false? pnode?)) (ptree?) . ->* . (or/c false? pnode?))
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(and pnode
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(if (member (->string pnode) (map (λ(x) (->string (if (list? x) (car x) x))) (cdr ptree)))
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(->string (car ptree))
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(ormap (λ(x) (parent pnode x)) (filter list? ptree)))))
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(define+provide/contract (children pnode [ptree (current-ptree)])
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(((or/c false? pnode?)) (ptree?) . ->* . (or/c false? (listof pnode?)))
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(and pnode
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(if (equal? (->string pnode) (->string (car ptree)))
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(map (λ(x) (->string (if (list? x) (car x) x))) (cdr ptree))
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(ormap (λ(x) (children pnode x)) (filter list? ptree)))))
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(define+provide/contract (siblings pnode [ptree (current-ptree)])
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(((or/c false? pnode?)) (ptree?) . ->* . (or/c false? (listof string?)))
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(children (parent pnode ptree) ptree))
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;; flatten tree to sequence
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(define+provide/contract (ptree->list [ptree (current-ptree)])
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(ptree? . -> . (listof string?))
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; use cdr to get rid of root tag at front
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(map ->string (cdr (flatten ptree))))
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(define+provide/contract (adjacents side pnode [ptree (current-ptree)])
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((symbol? (or/c false? pnode?)) (ptree?) . ->* . (or/c false? (listof pnode?)))
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(and pnode
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(let* ([proc (if (equal? side 'left) takef takef-right)]
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[result (proc (ptree->list ptree) (λ(x) (not (equal? (->string pnode) (->string x)))))])
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(and (not (empty? result)) result))))
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(define+provide/contract (left-adjacents pnode [ptree (current-ptree)])
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(((or/c false? pnode?)) (ptree?) . ->* . (or/c false? (listof pnode?)))
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(adjacents 'left pnode ptree))
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(define+provide/contract (right-adjacents pnode [ptree (current-ptree)])
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(((or/c false? pnode?)) (ptree?) . ->* . (or/c false? (listof pnode?)))
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(adjacents 'right pnode ptree))
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(define+provide/contract (previous pnode [ptree (current-ptree)])
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(((or/c false? pnode?)) (ptree?) . ->* . (or/c false? pnode?))
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(let ([result (left-adjacents pnode ptree)])
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(and result (last result))))
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(define+provide/contract (next pnode [ptree (current-ptree)])
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(((or/c false? pnode?)) (ptree?) . ->* . (or/c false? pnode?))
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(let ([result (right-adjacents pnode ptree)])
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(and result (first result))))
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;; this is a helper function to permit unit tests
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(define+provide (pnode->url/paths pnode url-list)
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;; check for duplicates because some sources might have already been rendered
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(define output-paths (remove-duplicates (map ->output-path url-list) equal?))
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(define matching-paths (filter (λ(x) (equal? (->string x) (->string pnode))) output-paths))
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(cond
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[((len matching-paths) . = . 1) (->string (car matching-paths))]
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[((len matching-paths) . > . 1) (error "More than one matching URL for" pnode)]
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[else #f]))
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(define+provide/contract (pnode->url pnode [url-context (current-url-context)])
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((pnode?) (pathish?) . ->* . (or/c false? pnode?))
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(parameterize ([current-url-context url-context])
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(pnode->url/paths pnode (directory-list (current-url-context)))))
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;; this sets default input for following functions
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(define+provide/contract (ptree-root->ptree tx)
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;; (not/c ptree) prevents ptrees from being accepted as input
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((and/c txexpr?) . -> . ptree?)
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tx)
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(define+provide/contract (pnodes-unique?/error x)
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(any/c . -> . boolean?)
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(define members (filter-not whitespace? (flatten x)))
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(and (andmap pnode?/error members)
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(members-unique?/error (map ->string members))))
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(define+provide/contract (ptree-source-decode . elements)
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(() #:rest pnodes-unique?/error . ->* . ptree?)
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(ptree-root->ptree (decode (cons world:ptree-root-node elements)
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#:xexpr-elements-proc (λ(xs) (filter-not whitespace? xs)))))
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(define current-ptree (make-parameter `(,world:ptree-root-node)))
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(define current-url-context (make-parameter (world:current-project-root)))
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(provide current-ptree current-url-context)
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;; used to convert here-path into here
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(define+provide/contract (path->pnode path)
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(pathish? . -> . pnode?)
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(->string (->output-path (find-relative-path (world:current-project-root) (->path path))))) |