927 lines
27 KiB
Scheme
927 lines
27 KiB
Scheme
;; ,load /home/demattia/studium/studienarbeit/scsh-nuit/scheme/nuit-engine.scm
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(define-syntax when
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(syntax-rules ()
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((_ ?test ?do-this ...)
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(if ?test
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(begin ?do-this ... (values))
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(values)))))
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(define (with-lock lock thunk)
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(obtain-lock lock)
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(let ((val (thunk)))
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(release-lock lock)
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val))
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;;This is the "heart" of NUIT.
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;;In a central loop the program waits for input (with wgetch).
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;;In the upper buffer simply the functionalities of scsh-ncurses:
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;;input-buffer are used.
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;;The lower window is meant to be used more flexible. Depending on
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;;the active command the key-inputs are routed to the correct receiver,
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;;where one can specify how to react.
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;;*************************************************************************
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;;State
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(define-record-type app-window :app-window
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(make-app-window x y width height curses-win)
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app-window?
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(x app-window-x)
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(y app-window-y)
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(width app-window-width)
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(height app-window-height)
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(curses-win app-window-curses-win set-app-window-curses-win!))
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(define-record-discloser :app-window
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(lambda (rec)
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`(app-window
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(x ,(app-window-x rec)) (y ,(app-window-y rec))
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(w ,(app-window-width rec)) (h ,(app-window-height rec)))))
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(define bar-1 #f)
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(define active-command-window #f)
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(define command-frame-window #f)
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(define command-window #f)
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(define result-window #f)
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(define result-frame-window #f)
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(define executable-completions-lock (make-lock))
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(define executable-completions #f)
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(define key-control-x 24)
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(define key-o 111)
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(define key-tab 9)
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;;state of the upper window (Command-Window)
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(define command-buffer
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(make-buffer '("Welcome to the scsh-ncurses-ui!" "")
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2 2 2 1 1
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0 0
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#t 1))
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;;state of the lower window (Result-Window)
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;;----------------------------
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;;Text
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(define result-buffer
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(make-result-buffer 0 0 0 0
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#f #f ; set in INIT-WINDOWS
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'() '()))
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;;miscelaneous state
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;;-------------------
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(define *focus-buffer* 'command-buffer)
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(define (focus-on-command-buffer?)
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(eq? *focus-buffer* 'command-buffer))
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(define (focus-command-buffer!)
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(set! *focus-buffer* 'command-buffer))
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(define (focus-on-result-buffer?)
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(eq? *focus-buffer* 'result-buffer))
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(define (focus-result-buffer!)
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(set! *focus-buffer* 'result-buffer))
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;; mode of the command buffer
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(define *command-buffer-mode* 'scheme)
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(define (command-buffer-in-scheme-mode?)
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(eq? *command-buffer-mode* 'scheme))
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(define (command-buffer-in-command-mode?)
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(eq? *command-buffer-mode* 'command))
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(define (enter-scheme-mode!)
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(set! *command-buffer-mode* 'scheme))
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(define (enter-command-mode!)
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(set! *command-buffer-mode* 'command))
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;; History
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(define history-pos 0)
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(define the-history (make-empty-history))
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(define (history) the-history)
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(define *current-history-item* #f)
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(define (current-history-item)
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*current-history-item*)
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(define-record-type history-entry :history-entry
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(make-history-entry command args viewer)
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history-entry?
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(command history-entry-command)
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(args history-entry-args)
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(viewer history-entry-viewer set-history-entry-viewer!))
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(define (current-history-entry-selector-maker selector)
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(lambda ()
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(cond
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((current-history-item)
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=> (lambda (entry)
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(selector (entry-data entry))))
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(else #f))))
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(define active-command
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(current-history-entry-selector-maker history-entry-command))
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(define active-command-arguments
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(current-history-entry-selector-maker history-entry-args))
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(define current-viewer
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(current-history-entry-selector-maker history-entry-viewer))
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(define (update-current-viewer! new-viewer)
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(cond
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((current-history-item)
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=> (lambda (entry)
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(set-history-entry-viewer! (entry-data entry) new-viewer)))
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(else (values))))
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(define (append-to-history! history-entry)
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(append-history-item! the-history history-entry)
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(set! *current-history-item*
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(history-last-entry the-history)))
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;; one step back in the history
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(define (history-back!)
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(cond
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((and (current-history-item)
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(history-prev-entry (current-history-item)))
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=> (lambda (prev)
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(set! *current-history-item* prev)))
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(else (values))))
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;; one step forward
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(define (history-forward!)
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(cond
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((and *current-history-item*
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(history-next-entry *current-history-item*))
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=> (lambda (next)
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(set! *current-history-item* next)))
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(else (values))))
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;;active keyboard-interrupt:
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;;after each input this is set to #f.
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;;If a keyboard-interrupt occurs this can be checked by looking-up this box
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(define active-keyboard-interrupt #f)
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;;The "user" (who extends the functionality of NUIT) has to inform NUIT
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;;about which function is meant to be the receiver, when a certain
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;;command is active
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;;*************************************************************************
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;;Actions
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;;start the whole thing
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(define (nuit)
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(let ((tty-name (init-tty-debug-output!)))
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(display "Debug messages will be on ")
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(display tty-name)
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(newline))
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(with-inspecting-handler
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8888
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(lambda (condition)
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(with-current-output-port*
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(error-output-port)
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(lambda ()
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(display "starting remote handler for condition")
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(display condition)
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(newline)
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(display "Please connect to port 8888")
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(newline)
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#t)))
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run))
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(define (toggle-buffer-focus)
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(cond
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((focus-on-command-buffer?)
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(focus-result-buffer!)
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(refresh-result-window))
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(else
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(focus-command-buffer!)
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(move-cursor command-buffer result-buffer)
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(refresh-command-window))))
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(define (toggle-command/scheme-mode)
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(cond
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((command-buffer-in-command-mode?)
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(enter-scheme-mode!))
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((command-buffer-in-scheme-mode?)
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(enter-command-mode!)))
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(paint-command-frame-window)
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(paint-command-window-contents)
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(move-cursor command-buffer result-buffer)
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(refresh-command-window))
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(define (handle-return-key)
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(let ((command-line (cadr (reverse (buffer-text command-buffer)))))
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(cond
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((string=? command-line "")
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(values))
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((command-buffer-in-scheme-mode?)
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(eval-command-in-scheme-mode command-line))
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((command-buffer-in-command-mode?)
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(eval-command-in-command-mode command-line))
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(else
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(error "Cannot handle return key" command-line)))))
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(define (find-command-plugin command)
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(or (find (lambda (p)
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(string=? (command-plugin-command p) command))
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(command-plugin-list))
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standard-command-plugin))
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(define (eval-command-in-command-mode command-line)
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(let* ((tokens (split-command-line command-line))
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(command (car tokens))
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(args (cdr tokens))
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(command-plugin (find-command-plugin command))
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(viewer
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(find/init-plugin-for-result
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(with-errno-handler
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((errno data)
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(else data))
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((command-plugin-evaluater command-plugin) command args))))
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(new-entry
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(make-history-entry command args viewer)))
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;; FIXME, use insert here
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(append-to-history! new-entry)))
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(define (eval-command-in-scheme-mode command-line)
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(let ((viewer
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(find/init-plugin-for-result
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(eval-expression command-line))))
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(let* ((tokens (split-command-line command-line))
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(command (car tokens))
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(args (cdr tokens))
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(new-entry
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(make-history-entry command args viewer)))
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;; #### shouldn't we use some kind of insertion here?
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(append-to-history! new-entry))))
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;; #### crufty
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(define split-command-line string-tokenize)
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;; handle input
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(define (run)
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(init-windows!)
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(init-executables-completion-set!)
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(set-process-group (pid) (pid))
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(set-tty-process-group (current-input-port) (pid))
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(set-interrupt-handler interrupt/tstp
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(lambda a
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(debug-message "SIGTSTP")))
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'(set-interrupt-handler interrupt/keyboard
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(lambda a
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(set! active-keyboard-interrupt a)))
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;;Loop
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(paint)
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(let loop ((ch (wait-for-input)) (c-x-pressed? #f)
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(completion-selector #f))
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(debug-message "command-buffer " command-buffer)
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(cond
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;; Ctrl-x -> wait for next input
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((= ch key-control-x)
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(loop (wait-for-input) #t completion-selector))
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((and (focus-on-result-buffer?) completion-selector)
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(let ((new-selector (completion-selector ch)))
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(loop (wait-for-input) c-x-pressed? new-selector)))
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;; tab pressed twice, select completion using select-list
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((and (focus-on-command-buffer?)
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completion-selector
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(= ch key-tab))
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(focus-result-buffer!)
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(loop (wait-for-input) #f completion-selector))
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;; tab is pressed in the first place, offer completions
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((and (focus-on-command-buffer?)
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(= ch key-tab))
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(let ((maybe-selector
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(offer-completions (last (buffer-text command-buffer)))))
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(loop (wait-for-input) #f maybe-selector)))
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;; F7 toggle scheme-mode / command-mode (FIXME: find a better key)
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((= ch key-home)
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(toggle-command/scheme-mode)
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(loop (wait-for-input) #f #f))
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((= ch key-f8)
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(show-shell-screen)
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(paint)
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(loop (wait-for-input) #f #f))
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;; C-x o --- toggle buffer focus
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((and c-x-pressed? (= ch key-o))
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(toggle-buffer-focus)
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(loop (wait-for-input) #f #f))
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;; C-x p --- insert selection
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((and c-x-pressed?
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(focus-on-command-buffer?)
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(current-history-item)
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(= ch 112))
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(add-string-to-command-buffer
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(send (current-viewer) 'get-selection))
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(loop (wait-for-input) #f #f))
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((and c-x-pressed? (focus-on-result-buffer?))
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(update-current-viewer!
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(send (current-viewer)
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'key-press ch key-control-x))
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(loop (wait-for-input) #f #f))
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;; C-x r --- redo
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((and c-x-pressed? (focus-on-command-buffer?)
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(= ch 114))
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(debug-message "Eric should re-implement redo..."))
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((= ch key-f1)
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(endwin))
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((= ch key-f2)
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(paint)
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(loop (wait-for-input) c-x-pressed? #f))
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;; forward in result history
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((= ch key-npage)
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(history-forward!)
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(when (current-history-item)
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(paint-active-command-window)
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(paint-result-window (entry-data (current-history-item))))
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(refresh-result-window)
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(loop (wait-for-input) c-x-pressed? #f))
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;; back in result history
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((= ch key-ppage)
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(history-back!)
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(when (current-history-item)
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(paint-active-command-window)
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(paint-result-window (entry-data (current-history-item))))
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(refresh-result-window)
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(loop (wait-for-input) c-x-pressed? #f))
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((and (focus-on-command-buffer?) (= ch 10))
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(input command-buffer ch)
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(werase (app-window-curses-win command-window))
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(print-command-buffer (app-window-curses-win command-window)
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command-buffer)
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(move-cursor command-buffer result-buffer)
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(refresh-command-window)
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(handle-return-key)
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(loop (wait-for-input) c-x-pressed? #f))
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(else
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(cond
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((focus-on-result-buffer?)
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(when (current-history-item)
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(update-current-viewer!
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(send (current-viewer)
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'key-press ch c-x-pressed?))
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(paint-result-window (entry-data (current-history-item)))
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(move-cursor command-buffer result-buffer)
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(refresh-result-window))
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(loop (wait-for-input) #f #f))
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(else
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(input command-buffer ch)
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(werase (app-window-curses-win command-window))
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(print-command-buffer (app-window-curses-win command-window)
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command-buffer)
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(move-cursor command-buffer result-buffer)
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(refresh-command-window)
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(loop (wait-for-input) c-x-pressed? #f)))))))
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(define (window-init-curses-win! window)
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(set-app-window-curses-win!
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window
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(newwin (app-window-height window) (app-window-width window)
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(app-window-y window) (app-window-x window))))
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(define (make-inlying-app-window outer-window)
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(make-app-window (+ (app-window-x outer-window) 1)
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(+ (app-window-y outer-window) 1)
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(- (app-window-width outer-window) 2)
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(- (app-window-height outer-window) 2)
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#f))
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(define (init-windows!)
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(init-screen)
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(set! bar-1
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(make-app-window 1 1
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(- (COLS) 2) 2
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#f))
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(set! active-command-window
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(make-app-window 1 (+ (round (/ (LINES) 3)) 2)
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(- (COLS) 2) 3
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#f))
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(set! command-frame-window
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(make-app-window 1 2
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(- (COLS) 2) (- (app-window-y active-command-window) 2)
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#f))
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(set! command-window
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(make-inlying-app-window command-frame-window))
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(set! result-frame-window
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(make-app-window 1 (+ (app-window-y active-command-window) 3)
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(- (COLS) 2)
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(- (- (LINES) 6) (app-window-height command-frame-window))
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#f))
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(set! result-window
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(make-inlying-app-window result-frame-window))
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(let ((all-windows (list bar-1 active-command-window
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command-frame-window command-window
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result-frame-window result-window)))
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(for-each window-init-curses-win! all-windows)
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(set-result-buffer-num-lines!
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result-buffer (- (app-window-height result-window) 2))
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(set-result-buffer-num-cols!
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result-buffer (- (app-window-width result-window) 3))
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(debug-message "init-windows!: bar-1 " bar-1
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" active-command-window " active-command-window
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" command-frame-window " command-frame-window
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" command-window " command-window
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" result-frame-window " result-frame-window
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" result-window " result-window)
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(for-each wclear
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(map app-window-curses-win all-windows))
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(clear)))
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(define (get-path-list)
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(cond
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((getenv "PATH")
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=> (lambda (str)
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(string-tokenize
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str (char-set-difference char-set:full (char-set #\:)))))
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(else
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'("/usr/bin" "/bin" "/usr/sbin" "/sbin"))))
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(define (init-executables-completion-set!)
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(spawn
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(lambda ()
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(with-lock executable-completions-lock
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(lambda()
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(set! executable-completions
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(make-completion-set-for-executables (get-path-list)))
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(debug-message "finished scanning executable-completions-set"))))))
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(define (paint-bar-1)
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(mvwaddstr (app-window-curses-win bar-1) 0 1 "SCSH-NUIT")
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(wrefresh (app-window-curses-win bar-1)))
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(define (paint-command-buffer-mode-indicator)
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(let ((mode-string
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(string-append
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"[ "
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(if (command-buffer-in-command-mode?)
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"Command"
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"Scheme")
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" ]")))
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(mvwaddstr
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(app-window-curses-win command-frame-window)
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0
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(- (- (app-window-width command-frame-window)
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(string-length mode-string))
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2)
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mode-string)))
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(define (paint-command-frame-window)
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(box (app-window-curses-win command-frame-window)
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(ascii->char 0) (ascii->char 0))
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(paint-command-buffer-mode-indicator)
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(wrefresh (app-window-curses-win command-frame-window)))
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(define (paint-command-window-contents)
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(set-buffer-num-lines! command-buffer
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(- (app-window-height command-window) 2))
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(set-buffer-num-cols! command-buffer
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(- (app-window-width command-window) 3))
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(werase (app-window-curses-win command-window))
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(print-command-buffer (app-window-curses-win command-window)
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command-buffer))
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(define (refresh-command-window)
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|
(wrefresh (app-window-curses-win command-window)))
|
|
|
|
(define (paint-result-frame-window)
|
|
(let ((win (app-window-curses-win result-frame-window)))
|
|
(wclear win)
|
|
(box win (ascii->char 0) (ascii->char 0))
|
|
(wrefresh win)))
|
|
|
|
(define (paint-result-window entry)
|
|
(let ((win (app-window-curses-win result-window)))
|
|
(wclear win)
|
|
(send (history-entry-viewer entry)
|
|
'paint win result-buffer (focus-on-result-buffer?))))
|
|
|
|
(define (refresh-result-window)
|
|
(wrefresh (app-window-curses-win result-window)))
|
|
|
|
(define (paint-result/command-buffer history-entry)
|
|
(paint-result-window history-entry)
|
|
(paint-active-command-window)
|
|
(scroll-command-buffer)
|
|
(paint-command-window-contents)
|
|
(move-cursor command-buffer result-buffer)
|
|
(refresh-result-window)
|
|
(refresh-command-window))
|
|
|
|
(define (paint)
|
|
(paint-bar-1)
|
|
(paint-command-frame-window)
|
|
(paint-command-window-contents)
|
|
(paint-active-command-window)
|
|
(paint-result-frame-window)
|
|
;(paint-result-window)
|
|
(move-cursor command-buffer result-buffer)
|
|
(refresh-command-window)
|
|
(refresh-result-window))
|
|
|
|
(define (wait-for-input)
|
|
(noecho)
|
|
(keypad (app-window-curses-win bar-1) #t)
|
|
(set! active-keyboard-interrupt #f)
|
|
(let ((ch (wgetch (app-window-curses-win bar-1))))
|
|
(echo)
|
|
ch))
|
|
|
|
(define (find/init-plugin-for-result result)
|
|
(cond
|
|
((determine-plugin-by-type result)
|
|
=> (lambda (view-plugin)
|
|
((view-plugin-constructor view-plugin)
|
|
result result-buffer)))
|
|
(else
|
|
(make-standard-viewer result result-buffer))))
|
|
|
|
;;scroll buffer after one command was entered
|
|
(define (scroll-command-buffer)
|
|
(set-buffer-pos-line! command-buffer
|
|
(+ (buffer-pos-line command-buffer) 1))
|
|
(set-buffer-pos-col! command-buffer 2))
|
|
|
|
(define (init-evaluation-environment package)
|
|
(let ((structure (reify-structure package)))
|
|
(load-structure structure)
|
|
(rt-structure->environment structure)))
|
|
|
|
(define (read-sexp-from-string string)
|
|
(let ((string-port (open-input-string string)))
|
|
(read string-port)))
|
|
|
|
(define eval-expression
|
|
(let ((env (init-evaluation-environment 'nuit-eval)))
|
|
(lambda (exp)
|
|
(with-fatal-and-capturing-error-handler
|
|
(lambda (condition raw-continuation continuation decline)
|
|
raw-continuation)
|
|
(lambda ()
|
|
(eval (read-sexp-from-string exp) env))))))
|
|
|
|
(define (determine-plugin-by-type result)
|
|
(find (lambda (r)
|
|
((view-plugin-type-predicate r) result))
|
|
(view-plugin-list)))
|
|
|
|
;;Management of the upper buffer
|
|
;;add a char to the buffer
|
|
(define (add-to-command-buffer ch)
|
|
(let* ((text (buffer-text command-buffer))
|
|
(last-pos (- (length text) 1))
|
|
(old-last-el (list-ref text last-pos))
|
|
(old-rest (sublist text 0 last-pos))
|
|
(before-ch (substring old-last-el 0
|
|
(max 0 (- (buffer-pos-col command-buffer) 2))))
|
|
(after-ch (substring old-last-el
|
|
(max 0 (- (buffer-pos-col command-buffer) 2))
|
|
(string-length old-last-el)))
|
|
(new-last-el (string-append before-ch
|
|
(string (ascii->char ch))
|
|
after-ch)))
|
|
(set-buffer-text! command-buffer
|
|
(append old-rest (list new-last-el)))
|
|
(set-buffer-pos-col! command-buffer
|
|
(+ (buffer-pos-col command-buffer) 1))))
|
|
|
|
;;add a string to the buffer
|
|
(define (add-string-to-command-buffer string)
|
|
(let loop ((str string))
|
|
(if (string=? str "")
|
|
(values)
|
|
(let ((first-ch (string-ref str 0)))
|
|
(add-to-command-buffer (char->ascii first-ch))
|
|
(loop (substring str 1 (string-length str)))))))
|
|
|
|
;;; FIXME: I guess s48 knows a better way to do this (see ,inspect)
|
|
(define (maybe-shorten-string string width)
|
|
(if (> (string-length string) width)
|
|
(string-append (substring string 0 (- width 3))
|
|
"...")
|
|
string))
|
|
|
|
(define (paint-active-command-window)
|
|
(let ((win (app-window-curses-win active-command-window))
|
|
(width (app-window-width active-command-window)))
|
|
(wclear win)
|
|
(box win (ascii->char 0) (ascii->char 0))
|
|
(cond
|
|
((current-history-item)
|
|
=> (lambda (entry)
|
|
(mvwaddstr win 1 2
|
|
(maybe-shorten-string
|
|
(history-entry-command (entry-data entry)) width)))))
|
|
(wrefresh win)))
|
|
|
|
;;Cursor
|
|
;;move cursor to the corrct position
|
|
(define (move-cursor command-buffer result-buffer)
|
|
(cond
|
|
((focus-on-command-buffer?)
|
|
(cursor-right-pos
|
|
(app-window-curses-win command-window)
|
|
command-buffer))
|
|
(else
|
|
(compute-y-x result-buffer)
|
|
(wmove (app-window-curses-win result-window)
|
|
(result-buffer-y result-buffer)
|
|
(result-buffer-x result-buffer))
|
|
(wrefresh (app-window-curses-win result-window)))))
|
|
|
|
;;compue pos-x and pos-y
|
|
(define (compute-y-x result-buffer)
|
|
(let ((pos-result (result-buffer-line result-buffer))
|
|
(pos-result-col (result-buffer-column result-buffer))
|
|
(result-lines (result-buffer-num-lines result-buffer)))
|
|
(if (>= pos-result result-lines)
|
|
(set-result-buffer-y! result-buffer result-lines)
|
|
(set-result-buffer-y! result-buffer pos-result))
|
|
(set-result-buffer-x! result-buffer pos-result-col)))
|
|
|
|
(define (sublist l pos k)
|
|
(let ((tmp (list-tail l pos)))
|
|
(reverse (list-tail (reverse tmp)
|
|
(- (length tmp) k)))))
|
|
|
|
;;When NUIT is closed the state has to be restored, in order to let the
|
|
;;user start again from scratch
|
|
(define (restore-state)
|
|
(set! history '())
|
|
(set! history-pos 0)
|
|
(set! active-keyboard-interrupt #f))
|
|
|
|
(define (get-param-as-str param-lst)
|
|
(let loop ((lst param-lst)
|
|
(str ""))
|
|
(if (null? lst)
|
|
str
|
|
(loop (cdr lst)
|
|
(string-append str " " (car lst))))))
|
|
|
|
(define (completions->select-list completions num-lines)
|
|
(debug-message "possible completions " completions)
|
|
(make-select-list
|
|
(map (lambda (s) (make-unmarked-element s #f s))
|
|
completions)
|
|
num-lines))
|
|
|
|
(define (command-contains-path? command)
|
|
(or (string-contains command "/")
|
|
(string-contains command "~")
|
|
(string-contains command "..")))
|
|
|
|
(define (files-in-dir file-filter dir)
|
|
(with-cwd dir
|
|
(filter-map
|
|
(lambda (file)
|
|
(and (file-filter file)
|
|
(absolute-file-name file dir)))
|
|
(directory-files))))
|
|
|
|
(define (complete-path path)
|
|
(let ((dir (file-name-directory path)))
|
|
(map (lambda (p)
|
|
(if (string-prefix? "/" p)
|
|
p
|
|
(string-append dir p)))
|
|
(glob (string-append path "*")))))
|
|
|
|
(define (complete-with-filesystem-objects filter partial-name)
|
|
(if (and (file-exists? partial-name) (file-directory? partial-name))
|
|
(files-in-dir filter partial-name)
|
|
(complete-path partial-name)))
|
|
|
|
(define (complete-executables/path partial-name)
|
|
(complete-with-filesystem-objects
|
|
(lambda (file)
|
|
(or (file-executable? file) (file-directory? file)))
|
|
partial-name))
|
|
|
|
(define (complete-files/path partial-name)
|
|
(complete-with-filesystem-objects
|
|
(lambda (file) #t) partial-name))
|
|
|
|
(define (command-mode-completer command prefix args args-pos)
|
|
(debug-message "command-mode-completer" prefix "|" args "|" args-pos)
|
|
(cond
|
|
((command-contains-path? prefix)
|
|
;; #### FIXME ignore errors here?
|
|
((if (zero? args-pos)
|
|
complete-executables/path
|
|
complete-files/path)
|
|
(expand-file-name prefix (cwd))))
|
|
(else
|
|
(append
|
|
(completions-for (command-completions) prefix)
|
|
(with-lock executable-completions-lock
|
|
(lambda ()
|
|
(completions-for-executables executable-completions prefix)))))))
|
|
|
|
(define (assemble-line-with-completion command arg arg-pos completion)
|
|
(debug-message "assemble-line-with-completion "
|
|
command "," arg "," arg-pos "," completion)
|
|
(let ((string-append* (lambda (s t)
|
|
(if (string=? s "")
|
|
t
|
|
(string-append s " " t)))))
|
|
(let lp ((tokens (cons command arg))
|
|
(arg-count 0)
|
|
(cursor-pos 0)
|
|
(line ""))
|
|
(cond
|
|
((null? tokens)
|
|
(values line (+ 2 cursor-pos)))
|
|
((= arg-count arg-pos)
|
|
(lp (cdr tokens)
|
|
(+ arg-count 1)
|
|
(+ cursor-pos (string-length completion))
|
|
(string-append* line completion)))
|
|
(else
|
|
(lp (cdr tokens)
|
|
(+ arg-count 1)
|
|
(+ 1 (+ cursor-pos (string-length (car tokens))))
|
|
(string-append* line (car tokens))))))))
|
|
|
|
(define (display-completed-line line cursor-pos)
|
|
(debug-message "display-completed-line " line "," cursor-pos)
|
|
(set-buffer-pos-col! command-buffer cursor-pos)
|
|
(set-buffer-text! command-buffer
|
|
(append
|
|
(drop-right (buffer-text command-buffer) 1)
|
|
(list line)))
|
|
(wclrtoeol (app-window-curses-win command-window))
|
|
(print-command-buffer (app-window-curses-win command-window)
|
|
command-buffer)
|
|
(move-cursor command-buffer result-buffer)
|
|
(refresh-command-window))
|
|
|
|
(define (paint-completion-select-list select-list command)
|
|
(let ((win (app-window-curses-win result-window)))
|
|
(wclear win)
|
|
(wattron win (A-BOLD))
|
|
(mvwaddstr win 0 0
|
|
(string-append "Possible completions for " command))
|
|
(wattrset win (A-NORMAL))
|
|
((paint-selection-list-at select-list 0 2)
|
|
win result-buffer (focus-on-result-buffer?))
|
|
(refresh-result-window)))
|
|
|
|
;; #### implement me
|
|
(define (completer-function-for-command command)
|
|
#f)
|
|
|
|
(define (call-completer command args prefix arg-pos)
|
|
(cond
|
|
((= 0 arg-pos)
|
|
(command-mode-completer command prefix args arg-pos))
|
|
((completer-function-for-command command)
|
|
=> (lambda (completer)
|
|
(completer command prefix args arg-pos)))
|
|
(else
|
|
(command-mode-completer command prefix args arg-pos))))
|
|
|
|
(define (offer-completions command)
|
|
(let* ((tokens/cursor-list (tokenize-command command))
|
|
(args (map car (cdr tokens/cursor-list)))
|
|
(command (caar tokens/cursor-list)))
|
|
(call-with-values
|
|
(lambda ()
|
|
(find-token-with-cursor tokens/cursor-list))
|
|
(lambda (prefix arg-pos)
|
|
;; #### FIXME
|
|
(if (not prefix)
|
|
(error "could not determine token with cursor position"
|
|
tokens/cursor-list command
|
|
(- (buffer-pos-col command-buffer) 2)))
|
|
(let ((completions
|
|
(call-completer command args
|
|
prefix arg-pos)))
|
|
(if (= (length completions) 1)
|
|
(begin
|
|
(call-with-values
|
|
(lambda ()
|
|
(assemble-line-with-completion
|
|
command args arg-pos (car completions)))
|
|
display-completed-line)
|
|
#f)
|
|
(let* ((select-list
|
|
(completions->select-list
|
|
completions
|
|
(- (result-buffer-num-lines result-buffer) 3)))
|
|
(selector
|
|
(make-completion-selector
|
|
select-list completions
|
|
command args arg-pos)))
|
|
(paint-completion-select-list select-list command)
|
|
(move-cursor command-buffer result-buffer)
|
|
(refresh-command-window)
|
|
selector)))))))
|
|
|
|
(define (make-completion-selector select-list completions
|
|
command arg arg-pos)
|
|
(lambda (key)
|
|
(cond
|
|
((= key 10)
|
|
(focus-command-buffer!)
|
|
(call-with-values
|
|
(lambda ()
|
|
(assemble-line-with-completion
|
|
command arg arg-pos
|
|
(select-list-selected-entry select-list)))
|
|
display-completed-line)
|
|
#f)
|
|
((or (select-list-navigation-key? key)
|
|
(select-list-marking-key? key))
|
|
(let ((new-select-list
|
|
(select-list-handle-key-press select-list key)))
|
|
(paint-completion-select-list
|
|
new-select-list (last (buffer-text command-buffer)))
|
|
(make-completion-selector
|
|
new-select-list completions command arg arg-pos)))
|
|
(else
|
|
;; #### FIXME we loose a character this way
|
|
(focus-command-buffer!)
|
|
#f))))
|
|
|
|
(define (find-token-with-cursor tokens/cursor-list)
|
|
(debug-message "find-token-with-cursor " tokens/cursor-list)
|
|
(let lp ((lst tokens/cursor-list) (i 0))
|
|
(cond
|
|
((null? lst)
|
|
(values #f i))
|
|
((cdar lst)
|
|
(values (caar lst) i))
|
|
(else
|
|
(lp (cdr lst) (+ i 1))))))
|
|
|
|
(define (command-token-delimiter? c)
|
|
(char-set-contains? char-set:whitespace c))
|
|
|
|
(define (skip-delimters delimiter? chars)
|
|
(let lp ((chars chars) (i 0))
|
|
(cond
|
|
((null? chars) (values '() i))
|
|
((delimiter? (car chars))
|
|
(lp (cdr chars) (+ i 1)))
|
|
(else (values chars i)))))
|
|
|
|
(define (tokenize-command command)
|
|
(let ((cursor-pos (- (buffer-pos-col command-buffer) 2))) ;; don't ask
|
|
(let lp ((chars (string->list command))
|
|
(token "")
|
|
(tokens '())
|
|
(i 0))
|
|
(cond
|
|
((null? chars)
|
|
(reverse (cons (cons token (= i cursor-pos)) tokens)))
|
|
((command-token-delimiter? (car chars))
|
|
(call-with-values
|
|
(lambda ()
|
|
(skip-delimters command-token-delimiter? chars))
|
|
(lambda (rest skipped)
|
|
(lp rest "" (cons (cons token (= i cursor-pos)) tokens)
|
|
(+ i skipped)))))
|
|
(else
|
|
(lp (cdr chars) (string-append token (string (car chars)))
|
|
tokens (+ i 1)))))))
|
|
|