(module string-constant mzscheme (require-for-syntax mzlib/etc mzlib/list (prefix english: "english-string-constants.ss") (prefix spanish: "spanish-string-constants.ss") (prefix german: "german-string-constants.ss") (prefix french: "french-string-constants.ss") (prefix dutch: "dutch-string-constants.ss") (prefix danish: "danish-string-constants.ss") (prefix portuguese: "portuguese-string-constants.ss") (prefix japanese: "japanese-string-constants.ss") (prefix traditional-chinese: "traditional-chinese-string-constants.ss") (prefix simplified-chinese: "simplified-chinese-string-constants.ss")) (require mzlib/file mzlib/etc "private/only-once.ss") (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 platofmr.s 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)"))) ;; 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]) (cond [(null? table) 'english] [else (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 (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)) (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))) (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 langauges. ;; if it is set to anything else, you get all langauges. (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-table)]) (for-each (lambda (ent) (hash-table-put! 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-table-get 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 (lambda (x y) (string<=? (symbol->string (car x)) (symbol->string (car y)))))) (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-object->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-object->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 ...)))])))) #| (require string-constant) (string-constant is-this-your-native-language) (string-constants is-this-your-native-language) (all-languages) (this-language) (expand #'(string-constant is-this-your-native-language)) (expand #'(string-constants is-this-your-native-language)) |#