racket/collects/string-constants/string-constant.rkt
2011-04-26 23:26:19 -05:00

246 lines
12 KiB
Racket

#lang racket/base
(require (for-syntax racket/base)
(for-syntax mzlib/etc)
(for-syntax mzlib/list)
(for-syntax (prefix-in english: "private/english-string-constants.rkt"))
(for-syntax (prefix-in spanish: "private/spanish-string-constants.rkt"))
(for-syntax (prefix-in german: "private/german-string-constants.rkt"))
(for-syntax (prefix-in french: "private/french-string-constants.rkt"))
(for-syntax (prefix-in dutch: "private/dutch-string-constants.rkt"))
(for-syntax (prefix-in danish: "private/danish-string-constants.rkt"))
(for-syntax (prefix-in portuguese: "private/portuguese-string-constants.rkt"))
(for-syntax (prefix-in japanese: "private/japanese-string-constants.rkt"))
(for-syntax (prefix-in traditional-chinese: "private/traditional-chinese-string-constants.rkt"))
(for-syntax (prefix-in simplified-chinese: "private/simplified-chinese-string-constants.rkt"))
(for-syntax (prefix-in russian: "private/russian-string-constants.rkt"))
(for-syntax (prefix-in ukrainian: "private/ukrainian-string-constants.rkt"))
(for-syntax (prefix-in korean: "private/korean-string-constants.rkt")))
(require mzlib/file
mzlib/etc
"private/only-once.rkt")
(provide string-constant string-constants this-language all-languages set-language-pref)
;; set-language-pref : symbol -> void
(define (set-language-pref language)
(put-preferences (list 'plt:human-language) (list language)))
;; table : (listof (list symbol regexp regexp))
;; this table indicates what the default value of the natural language
;; preference is. the first regexp is used under Windows and the second
;; is used on other platforms. All regexps are compared to the result
;; of (system-language+country)
(define table
'((english #rx"^en_" #rx"^English_")
(spanish #rx"^es_" #rx"^Espanol_")
(german #rx"^de_" #rx"^German_")
(french #rx"^fr_" #rx"French_")
(dutch #rx"nl_" #rx"^Netherlands_")
(danish #rx"^da_DK" #rx"^Danish_")
(portuguese #rx"^pt_" #rx"Portuguese_")
(japanese #rx"^ja_" #rx"^Japan_")
(traditional-chinese #rx"^zh_(HK|TW)" #rx"Chinese_China")
(simplified-chinese #rx"^zh_CN" #rx"Chinese_(Hong|Taiwan)")
(russian #rx"^ru_" #rx"^Russian_")
(ukrainian #rx"^uk_" #rx"^Ukrainian_")
(korean #rx"^ko_" #rx"^Korean_")))
;; default-language : -> symbol
;; uses `table' and system-language+contry to find what language to start with
(define (default-language)
(let ([slc (system-language+country)])
(let loop ([table table])
(if (null? table)
'english
(let ([ent (car table)])
(if (or (regexp-match (cadr ent) slc)
(and (cddr ent)
(regexp-match (caddr ent) slc)))
(car ent)
(loop (cdr table))))))))
;; language : symbol
(define language
(with-handlers ([exn:fail? (lambda (_) (default-language))])
(get-preference 'plt:human-language (lambda () (default-language)))))
(define-syntax-set (string-constant string-constants this-language all-languages)
;; type sc = (make-sc symbol (listof (list symbol string)) (union #f hash-table[symbol -o> #t]))
(define-struct sc (language-name constants ht) #:mutable)
(define available-string-constant-sets
(list
(make-sc 'english english:string-constants #f)
(make-sc 'spanish spanish:string-constants #f)
(make-sc 'french french:string-constants #f)
(make-sc 'german german:string-constants #f)
(make-sc 'dutch dutch:string-constants #f)
(make-sc 'danish danish:string-constants #f)
(make-sc 'portuguese portuguese:string-constants #f)
(make-sc 'japanese japanese:string-constants #f)
(make-sc 'traditional-chinese traditional-chinese:string-constants #f)
(make-sc 'simplified-chinese simplified-chinese:string-constants #f)
(make-sc 'russian russian:string-constants #f)
(make-sc 'ukrainian ukrainian:string-constants #f)
(make-sc 'korean korean:string-constants #f)))
(define first-string-constant-set (car available-string-constant-sets))
;; env-var-set? : symbol -> boolean
;; returns #t if the user has requested this langage info.
;; If the environment variable is set to something that
;; isn't well-formed according to `read' you get all output
;; If the environment variable is set to a symbol (according to read)
;; you get that language. If it is set to a list of symbols
;; (again, according to read) you get those languages.
;; if it is set to anything else, you get all languages.
(define (env-var-set? lang)
(cond [(symbol? specific) (eq? lang specific)]
[(list? specific) (memq lang specific)]
[else #t]))
(define env-var-set
(or (getenv "PLTSTRINGCONSTANTS")
(getenv "STRINGCONSTANTS")))
(define specific
(and env-var-set
(with-handlers ([exn:fail:read? (lambda (x) #t)])
(read (open-input-string env-var-set)))))
(define the-warning-message #f)
(define (get-warning-message)
(unless the-warning-message
(set! the-warning-message
(let* (;; type no-warning-cache-key = (cons symbol symbol)
;; warning-table : (listof (list no-warning-cache-key (listof (list sym string))))
[warning-table null]
[extract-ht
(lambda (sc)
(unless (sc-ht sc)
(let ([ht (make-hash)])
(for-each (lambda (ent) (hash-set! ht (car ent) #t))
(sc-constants sc))
(set-sc-ht! sc ht)))
(sc-ht sc))]
[check-one-way
(lambda (sc1 sc2)
(let ([assoc1 (sc-constants sc1)]
[assoc2 (sc-constants sc2)]
[ht2 (extract-ht sc2)])
(for-each
(lambda (pair1)
(let* ([constant1 (car pair1)]
[value1 (cadr pair1)]
[pair2 (hash-ref ht2 constant1 (lambda () #f))])
(unless pair2
(let ([no-warning-cache-key (cons (sc-language-name sc1) (sc-language-name sc2))])
(when (or (env-var-set? (sc-language-name sc1))
(env-var-set? (sc-language-name sc2)))
(cond
[(memf (lambda (ent) (equal? (mcar ent) no-warning-cache-key)) warning-table)
=>
(lambda (x)
(let ([ent (car x)])
(set-mcdr! ent (cons (list constant1 value1) (mcdr ent)))))]
[else
(set! warning-table (cons (mcons no-warning-cache-key
(list (list constant1 value1)))
warning-table))]))))))
assoc1)))])
(for-each (lambda (x)
(check-one-way x first-string-constant-set)
(check-one-way first-string-constant-set x))
(cdr available-string-constant-sets))
(let ([sp (open-output-string)])
(for-each
(lambda (bad)
(let* ([lang-pair (mcar bad)]
[constants (mcdr bad)]
[lang1-name (car lang-pair)]
[lang2-name (cdr lang-pair)])
(fprintf sp "WARNING: language ~a had but ~a does not:\n"
lang1-name
lang2-name)
(for-each (lambda (x) (fprintf sp " ~s\n" x))
(sort constants string<=?
#:key (lambda (p)
(symbol->string (car p)))
#:cache-keys? #t))
(newline sp)))
warning-table)
(get-output-string sp)))))
the-warning-message)
(define (string-constant/proc stx)
(syntax-case stx ()
[(_ name)
(let ([assoc-table (sc-constants first-string-constant-set)]
[datum (syntax->datum (syntax name))])
(unless (symbol? datum)
(raise-syntax-error #f (format "expected name, got: ~s" datum) stx))
(let ([default-val (assq datum assoc-table)])
(unless default-val
(raise-syntax-error
#f
(format "~a is not a known string constant" datum)
stx))
(with-syntax ([(constants ...)
(map (lambda (x)
(let ([val (assq datum (sc-constants x))])
(if val
(cadr val)
(cadr default-val))))
available-string-constant-sets)]
[(languages ...)
(map sc-language-name available-string-constant-sets)]
[first-constant
(cadr (assq datum (sc-constants first-string-constant-set)))])
(with-syntax ([conditional-for-string
(syntax/loc stx
(cond [(eq? language 'languages) constants] ...
[else first-constant]))])
(if env-var-set
(with-syntax ([warning-message (get-warning-message)])
(syntax/loc stx
(begin (maybe-print-message warning-message)
conditional-for-string)))
(syntax/loc stx conditional-for-string))))))]))
(define (string-constants/proc stx)
(syntax-case stx ()
[(_ name)
(let ([assoc-table (sc-constants first-string-constant-set)]
[datum (syntax->datum (syntax name))])
(unless (symbol? datum)
(raise-syntax-error #f (format "expected name, got: ~s" datum) stx))
(let ([default-val (assq datum assoc-table)])
(unless default-val
(raise-syntax-error
#f
(format "~a is not a known string constant" datum)
stx))
(with-syntax ([(constants ...)
(map (lambda (x)
(let ([val (assq datum (sc-constants x))])
(if val
(cadr val)
(cadr default-val))))
available-string-constant-sets)])
(syntax (list constants ...)))))]))
(define (this-language/proc stx)
(syntax-case stx () [(_) (syntax language)]))
(define (all-languages/proc stx)
(syntax-case stx ()
[(_)
(with-syntax ([(languages ...)
(map sc-language-name available-string-constant-sets)])
(syntax (list 'languages ...)))])))