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handin-multi.rkt
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#lang racket/base
(require racket/class racket/port racket/gui/base framework browser/external
"info.rkt" "client-gui.rkt" "this-collection.rkt")
(define handin-name (#%info-lookup 'name))
(define web-address (#%info-lookup 'web-address
(lambda () "http://racket-lang.org")))
(define selection-mode (#%info-lookup 'selection-mode (lambda () 'extended)))
(define selection-defaults
(let ([sd (#%info-lookup 'selection-default (lambda () '("*.rkt")))])
(if (string? sd) (list sd) sd)))
(define last-dir-key (make-my-key 'multifile:last-dir))
(preferences:set-default last-dir-key "" string?)
(define last-auto-key (make-my-key 'multifile:last-auto))
(preferences:set-default last-auto-key (car selection-defaults) string?)
(define geometry-key (make-my-key 'multifile:geometry))
(preferences:set-default geometry-key #f void)
(define update
(and (#%info-lookup 'enable-auto-update (lambda () #f))
(dynamic-require `(lib "updater.rkt" ,this-collection-name) 'update)))
;; ==========================================================================
(define magic #"<<<MULTI-SUBMISSION-FILE>>>")
(define (pack-files files)
(let/ec return
(parameterize ([current-output-port (open-output-bytes)])
(printf "~a\n" magic)
(for ([file (in-list files)])
(let ([size (and (file-exists? file) (file-size file))])
(unless size (return #f))
(let ([buf (with-input-from-file file
(lambda () (read-bytes size)))])
(unless (equal? size (bytes-length buf)) (return #f))
(write (list file buf)) (newline))))
(flush-output)
(get-output-bytes (current-output-port)))))
(define ((unpack-files parent) buf)
(let/ec return
(define (error* msg)
(message-box "Retrieve Error" msg parent)
(return #f))
(parameterize ([current-input-port (open-input-bytes buf)])
(unless (equal? magic (read-bytes (bytes-length magic)))
(error* "Error in retrieved content: bad format"))
(let ([files
(let loop ([files '()])
(let ([f (with-handlers ([void void]) (read))])
(if (eof-object? f)
(reverse files) (loop (cons f files)))))]
[overwrite-all? #f])
(define (write? file)
(define (del)
;; check if exists: users might rename files during questions
(when (file-exists? file) (delete-file file)))
(cond [(not (file-exists? file)) #t]
[overwrite-all? (del) #t]
[else (case (message-box/custom
"Retrieve"
(format "~s already exists, overwrite?" file)
"&Yes" "&No" "Yes to &All" parent
'(default=2 caution) 4)
[(1) (del) #t]
[(2) #f]
[(3) (set! overwrite-all? #t) (del) #t]
[(4) (error* "Aborting...")])]))
(unless (and (list? files)
(andmap (lambda (x)
(and (list? x) (= 2 (length x))
(string? (car x)) (bytes? (cadr x))))
files))
(error* "Error in retrieved content: bad format"))
(for ([file (in-list files)])
(let ([file (car file)] [buf (cadr file)])
(when (write? file)
(with-output-to-file file
(lambda () (display buf) (flush-output))))))
(message-box "Retrieve" "Retrieval done" parent)))))
;; ==========================================================================
(define multifile-dialog%
(class frame%
;; ----------------------------------------------------------------------
(let ([g (preferences:get geometry-key)])
(super-new [label (format "~a Handin" handin-name)]
[stretchable-width #t] [stretchable-height #t]
[width (and g (car g))] [height (and g (cadr g))]
[x (and g (caddr g))] [y (and g (cadddr g))]))
(define main-pane (new horizontal-pane% [parent this]))
(define buttons-pane
(new vertical-pane% [parent main-pane] [stretchable-width #f]))
(define files-pane
(new vertical-pane% [parent main-pane]))
;; ----------------------------------------------------------------------
(define (close)
(preferences:set geometry-key
(list (send this get-width) (send this get-height)
(send this get-x) (send this get-y)))
;; (preferences:save)
(send this show #f))
(define/augment (on-close) (close))
;; ----------------------------------------------------------------------
(new button% [parent buttons-pane]
[label (make-object bitmap% (in-this-collection "icon.png"))]
[callback (lambda _ (send-url web-address))])
(new pane% [parent buttons-pane])
(let ([button (lambda (label callback)
(new button% [label label] [parent buttons-pane]
[stretchable-width #t] [callback callback]))])
(button "&Submit" (lambda _ (do-submit)))
(button "&Retrieve" (lambda _ (do-retrieve)))
(button "A&ccount" (lambda _ (new manage-handin-dialog% [parent this])))
(when update (button "&Update" (lambda _ (update this #t))))
(button "C&lose" (lambda _ (close))))
;; ----------------------------------------------------------------------
(define files-list
(new list-box% [label "&Files:"] [parent files-pane]
[style `(,selection-mode vertical-label)] [enabled #f]
[choices '("Drag something here," "or click below")]
[min-height 100] [stretchable-width #t] [stretchable-height #t]))
(define auto-select
(new combo-field% [label "&Auto:"] [parent files-pane]
[init-value (preferences:get last-auto-key)]
[choices selection-defaults]
[callback (lambda (t e)
(when (eq? (send e get-event-type) 'text-field-enter)
(preferences:set last-auto-key (send t get-value))
(do-selections '() '())))]))
(define directory-pane
(new horizontal-pane% [parent files-pane]
[stretchable-width #t] [stretchable-height #f]))
(define choose-dir-button
(new button% [label "&Directory:"] [parent directory-pane]
[callback (lambda _ (choose-dir))]))
(define current-working-directory
(new text-field% [label #f] [parent directory-pane] [init-value ""]
[callback (lambda (t e)
(when (eq? (send e get-event-type) 'text-field-enter)
(set-dir (send t get-value))
(send t focus)))]))
(let ([ldir (preferences:get last-dir-key)])
;; don't use init-value since it can get very long
(send current-working-directory set-value ldir)
(unless (equal? "" ldir) (current-directory ldir)))
;; ----------------------------------------------------------------------
(define dir-selected? #f)
(define (->string x)
(cond [(string? x) x]
[(path? x) (path->string x)]
[(bytes? x) (bytes->string/utf-8 x)]
[(symbol? x) (symbol->string x)]
[else (error '->string "bad input: ~e" x)]))
(define (get-selected+unselected)
(if (send files-list is-enabled?)
(let ([selected (send files-list get-selections)])
(let loop ([i (sub1 (send files-list get-number))] [s '()] [u '()])
(if (<= 0 i)
(let ([f (send files-list get-string i)])
(if (memq i selected)
(loop (sub1 i) (cons f s) u)
(loop (sub1 i) s (cons f u))))
(list (reverse s) (reverse u)))))
'(() ())))
(define (set-dir dir)
(let* ([dir (and dir (->string dir))]
[dir (and dir (not (equal? "" dir)) (directory-exists? dir)
(->string (simplify-path (path->complete-path
(build-path dir 'same)))))]
[sel+unsel (if (equal? dir (->string (current-directory)))
(get-selected+unselected) '(() ()))])
(when dir
(current-directory dir)
(set! dir-selected? #t)
(let ([t current-working-directory])
(send t set-value dir)
(send (send t get-editor) select-all))
(preferences:set last-dir-key dir)
(send files-list set
(sort (map ->string (filter file-exists? (directory-list)))
string<?))
(if (< 0 (send files-list get-number))
(begin (apply do-selections sel+unsel)
(send files-list enable #t)
(send files-list focus))
(begin (send files-list append "no files")
(send files-list enable #f))))))
(define (choose-dir)
(let ([ldir (preferences:get last-dir-key)])
(set-dir
(get-directory "Choose a directory with files to submit" this
(and (not (equal? ldir "")) ldir)))))
(define (refresh-dir)
(when dir-selected? (set-dir (current-directory))))
(define auto-glob+regexp '(#f #f))
(define (globs->regexps glob)
(if (equal? (car auto-glob+regexp) glob)
(cdr auto-glob+regexp)
(let* ([regexps
(map (lambda (glob)
(let* ([re (regexp-replace* #rx"[.]" glob "\\\\.")]
[re (regexp-replace* #rx"[?]" re ".")]
[re (regexp-replace* #rx"[*]" re ".*")]
[re (string-append "^" re "$")]
[re (with-handlers ([void (lambda _ #f)])
(regexp re))])
re))
(regexp-split ";" glob))]
[regexps (filter values regexps)]
[regexps (if (pair? regexps)
(lambda (file)
(ormap (lambda (re) (regexp-match re file))
regexps))
(lambda (_) #f))])
(set! auto-glob+regexp (cons glob regexps))
regexps)))
(define (do-selections selected unselected)
(define glob (send auto-select get-value))
(define regexps (globs->regexps glob))
(let loop ([n (sub1 (send files-list get-number))])
(when (<= 0 n)
(let ([file (send files-list get-string n)])
(send files-list select n
(cond [(member file selected) #t]
[(member file unselected) #f]
[else (regexps file)]))
(loop (sub1 n)))))
(send (if (send files-list is-enabled?) files-list choose-dir-button)
focus))
;; ----------------------------------------------------------------------
(define/override (on-drop-file path)
(cond [(directory-exists? path) (set-dir path)]
[(file-exists? path)
(let-values ([(dir name dir?) (split-path path)])
(set-dir dir)
(cond [(send files-list find-string (->string name))
=> (lambda (i) (send files-list select i #t))]))]))
(define/override (on-subwindow-char w e)
(define (next) (super on-subwindow-char w e))
(case (send e get-key-code)
[(escape) (close)]
[(f5) (refresh-dir)]
;; [(#\space) (if (eq? w files-list)
;; (printf ">>> ~s\n" (send files-list get-selection))
;; (next))]
[else (next)]))
;; ----------------------------------------------------------------------
(define (do-submit)
(let ([files (car (get-selected+unselected))])
(if (pair? files)
(let ([content (pack-files files)])
(if content
(new handin-frame% [parent this] [on-retrieve #f]
[content content])
(message-box "Handin" "Error when packing files" this)))
(message-box "Handin" "No files" this))))
(define (do-retrieve)
(if dir-selected?
(new handin-frame% [parent this] [content #f]
[on-retrieve (unpack-files this)])
(message-box "Handin" "No directory selected" this)))
;; ----------------------------------------------------------------------
(send this accept-drop-files #t)
(send choose-dir-button focus)
(send this show #t)
(when update (update this))))
(provide multifile-handin)
(define (multifile-handin) (new multifile-dialog%))