325 lines
10 KiB
Scheme
325 lines
10 KiB
Scheme
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;;directory-files
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;;---------------
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(define initial-working-directory (cwd))
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;;Result-Object für "directory-files"
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(define-record-type dirfiles-result-object dirfiles-result-object
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(make-dirfiles-result-object pos-y
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pos-x
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file-list
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result-text
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working-directory
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width
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initial-wd
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marked-items
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res-marked-items)
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dirfiles-result-object?
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(pos-y dirfiles-result-object-pos-y)
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(pos-x dirfiles-result-object-pos-x)
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(file-list dirfiles-result-object-file-list)
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(result-text dirfiles-result-object-result-text)
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(working-directory dirfiles-result-object-working-directory)
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(width dirfiles-result-object-width)
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(initial-wd dirfiles-result-object-initial-wd)
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(marked-items dirfiles-result-object-marked-items)
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(res-marked-items dirfiles-result-object-res-marked-items))
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;;Darstellung, falls die Eingabe ist: "(directory-files)"
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(define layout-result-dirfiles
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(lambda (result-str result width)
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(begin
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(let ((printed-file-list (print-file-list result))
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(directory (cwd))
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(heading ""))
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(begin
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(if (<= (string-length directory) (- width 27))
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(set! heading (string-append "Directory-Content of "
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directory " :"))
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(let ((dir-string (substring directory
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(- (string-length directory)
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(- width 27))
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(string-length directory))))
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(set! heading (string-append "Directory-Content of ..."
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dir-string))))
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(append (list heading) (list " <-")
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printed-file-list))))))
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;;Eine Datei pro Zeile
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;;Falls es sich um ein Verzeichnis handelt wird "/" hinzugefügt
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(define print-file-list
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(lambda (file-list)
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(let loop ((old file-list)
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(new '()))
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(if (equal? '() old)
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new
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(let ((hd (list-ref old 0))
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(tl (cdr old)))
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(if (file-directory? hd)
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(let ((new-str (string-append " " hd "/")))
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(loop tl (append new (list new-str))))
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(loop tl (append new (list (string-append " " hd))))))))))
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;;Auswahl->absteigen
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(define selected-dirfiles
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(lambda (model)
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(let ((ln (dirfiles-result-object-pos-y model))
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(wd (dirfiles-result-object-working-directory model)))
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(begin (chdir wd)
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(if (or (>= ln (+ (length
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(dirfiles-result-object-result-text model)) 1))
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(<= ln 1))
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model
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(if (= ln 2)
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(if (not (equal? "/" (cwd)))
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(begin
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(chdir "..")
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(let* ((new-result (evaluate "(directory-files)"))
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(new-result-string (exp->string new-result))
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(width (dirfiles-result-object-width model))
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(new-text (layout-result-dirfiles
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new-result-string
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new-result width))
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(new-model (make-dirfiles-result-object
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2
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1
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new-result
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new-text
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(cwd)
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width
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(dirfiles-result-object-initial-wd
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model)
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(dirfiles-result-object-marked-items
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model)
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(dirfiles-result-object-res-marked-items
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model))))
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new-model))
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model)
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(let* ((text (dirfiles-result-object-result-text model))
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(ent (list-ref text (- ln 1)))
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(len (string-length ent))
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(last-char (substring ent (- len 1) len))
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(rest (substring ent 1 (- len 1))))
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(if (equal? last-char "/")
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(begin
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(chdir rest)
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(let* ((new-result (evaluate "(directory-files)"))
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(new-result-string (exp->string new-result))
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(width (dirfiles-result-object-width model))
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(new-text (layout-result-dirfiles
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new-result-string new-result width))
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(new-model (make-dirfiles-result-object
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2
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1
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new-result
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new-text
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(cwd)
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width
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(dirfiles-result-object-initial-wd
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model)
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(dirfiles-result-object-marked-items
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model)
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(dirfiles-result-object-res-marked-items
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model))))
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new-model))
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model))))))))
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;;Receiver für directory-files
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(define dir-files-receiver
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(lambda (message)
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(cond
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((next-command-message? message)
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(let* ((command (next-command-string message))
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(result (evaluate "(directory-files)"))
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(result-string (exp->string result))
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(width (next-command-message-width message))
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(text (layout-result-dirfiles result-string result width))
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(model (make-dirfiles-result-object 2 1 result text (cwd)
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width (cwd) '() '())))
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model))
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((print-message? message)
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(let* ((model (print-message-object message))
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(posy (dirfiles-result-object-pos-y model))
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(posx (dirfiles-result-object-pos-x model))
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(text (dirfiles-result-object-result-text model))
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(marked-pos (get-marked-positions-3
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(dirfiles-result-object-file-list model)
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(dirfiles-result-object-marked-items model))))
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(make-print-object posy posx text (list posy) marked-pos)))
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((key-pressed-message? message)
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(let* ((model (key-pressed-message-result-model message))
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(key (key-pressed-message-key message)))
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(cond
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((= key key-up)
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(let ((posy (dirfiles-result-object-pos-y model)))
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(if (<= posy 2)
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model
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(let* ((new-posy (- posy 1))
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(new-model (make-dirfiles-result-object
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new-posy
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(dirfiles-result-object-pos-x model)
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(dirfiles-result-object-file-list model)
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(dirfiles-result-object-result-text
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model)
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(dirfiles-result-object-working-directory
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model)
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(dirfiles-result-object-width model)
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(dirfiles-result-object-initial-wd model)
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(dirfiles-result-object-marked-items
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model)
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(dirfiles-result-object-res-marked-items
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model))))
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new-model))))
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((= key key-down)
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(let ((posy (dirfiles-result-object-pos-y model))
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(num-lines (length
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(dirfiles-result-object-result-text model))))
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(if (>= posy num-lines)
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model
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(let* ((new-posy (+ posy 1))
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(new-model (make-dirfiles-result-object
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new-posy
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(dirfiles-result-object-pos-x model)
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(dirfiles-result-object-file-list model)
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(dirfiles-result-object-result-text
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model)
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(dirfiles-result-object-working-directory
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model)
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(dirfiles-result-object-width model)
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(dirfiles-result-object-initial-wd
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model)
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(dirfiles-result-object-marked-items
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model)
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(dirfiles-result-object-res-marked-items
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model))))
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new-model))))
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((= key 10)
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(selected-dirfiles model))
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;;Ctrl+s -> Auswahl
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((= key 19)
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(let* ((marked-items (dirfiles-result-object-marked-items model))
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(res-marked-items (dirfiles-result-object-res-marked-items
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model))
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(actual-pos (dirfiles-result-object-pos-y model))
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(all-items (dirfiles-result-object-file-list model)))
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(if (<= actual-pos 2)
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model
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(let ((actual-item (list-ref all-items (- actual-pos 3)))
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(actual-res-item #f))
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(begin
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(if (not (equal? (cwd) "/"))
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(set! actual-res-item (string-append (cwd) "/" actual-item))
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(set! actual-res-item (string-append "/" actual-item)))
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(if (member actual-res-item marked-items)
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model
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(let* ((new-res-marked-items (append res-marked-items
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(list
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actual-res-item)))
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(new-marked-items (append marked-items
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(list actual-item)))
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(new-model (make-dirfiles-result-object
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(dirfiles-result-object-pos-y model)
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(dirfiles-result-object-pos-x model)
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(dirfiles-result-object-file-list
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model)
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(dirfiles-result-object-result-text
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model)
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(dirfiles-result-object-working-directory
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model)
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(dirfiles-result-object-width model)
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(dirfiles-result-object-initial-wd
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model)
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new-marked-items
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new-res-marked-items)))
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new-model)))))))
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;;Ctrl+u -> aus Auswahl rausnehmen
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((= key 21)
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(let* ((marked-items (dirfiles-result-object-marked-items model))
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(res-marked-items (dirfiles-result-object-res-marked-items
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model))
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(actual-pos (dirfiles-result-object-pos-y model))
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(all-items (dirfiles-result-object-file-list model)))
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(if (<= actual-pos 2)
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model
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(let* ((actual-item (list-ref all-items (- actual-pos 3)))
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(actual-res-item (string-append (cwd) "/" actual-item))
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(rest (member actual-item marked-items))
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(res-rest (member actual-res-item res-marked-items)))
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(if (not res-rest)
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model
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(let* ((after-item (length rest))
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(all-items (length marked-items))
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(before-item (sublist marked-items
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0
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(- all-items
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after-item )))
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(new-marked-items (append before-item
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(list-tail rest 1)))
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(after-res-item (length res-rest))
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(all-res-items (length res-marked-items))
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(before-res-item (sublist res-marked-items
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0
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(- all-res-items
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after-res-item)))
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(new-res-marked-items (append before-res-item
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(list-tail res-rest
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1)))
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(new-model (make-dirfiles-result-object
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(dirfiles-result-object-pos-y model)
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(dirfiles-result-object-pos-x model)
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(dirfiles-result-object-file-list
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model)
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(dirfiles-result-object-result-text
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model)
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(dirfiles-result-object-working-directory
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model)
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(dirfiles-result-object-width model)
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(dirfiles-result-object-initial-wd
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model)
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new-marked-items
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new-res-marked-items)))
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new-model))))))
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(else model))))
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((restore-message? message)
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;(let ((model (restore-message-object message)))
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;(chdir (dirfiles-result-object-initial-wd model))))
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(chdir initial-working-directory))
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((selection-message? message)
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(let* ((model (selection-message-object message))
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(marked-items (dirfiles-result-object-res-marked-items model)))
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(string-append "'" (exp->string marked-items))))
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(else values))))
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(define dir-files-rec1
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(make-receiver "directory-files" dir-files-receiver))
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(set! receivers (cons dir-files-rec1 receivers))
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(define dir-files-rec2
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(make-receiver "ls" dir-files-receiver))
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(set! receivers (cons dir-files-rec2 receivers))
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