;;; history data structure

(define-interface history-interface
  (export make-empty-history
	  history?
	  entry?
	  entry-data
	  append-history-item!
	  insert-history-item!
	  history-next-entry
	  history-prev-entry
	  history-first-entry
	  history-last-entry))

(define-structure history history-interface
  (open scheme
	define-record-types)
  (files history))

;;; layout utilities

(define-interface layout-interface
  (export seperate-line
	  layout-result-standard
	  get-marked-positions-1
	  get-marked-positions-2
	  get-marked-positions-3
	  exp->string
	  sublist

	  ;; old drawing cruft
	  make-result-buffer
	  result-buffer?
	  result-buffer-line
	  set-result-buffer-line!
	  result-buffer-column
	  set-result-buffer-column!
	  result-buffer-y
	  set-result-buffer-y!
	  result-buffer-x
	  set-result-buffer-x!
	  result-buffer-num-lines
	  set-result-buffer-num-lines!
	  result-buffer-num-cols
	  set-result-buffer-num-cols!
	  result-buffer-highlighted
	  set-result-buffer-highlighted!
	  result-buffer-marked
	  set-result-buffer-marked!
	  make-simple-result-buffer-printer))

(define-structure layout layout-interface
  (open scheme
	srfi-6			;; basic string ports
	define-record-types

	tty-debug
	ncurses)
  (files layout))

;;; process viewer plugin

(define-structure process-view-plugin
    (export)
  (open scheme
	define-record-types
	srfi-1
	srfi-13
	formats

	pps
	plugin
	layout
	select-list
	tty-debug)
  (files process))

;;; file list view plugin

(define-structure dirlist-view-plugin
    (export)
  (open (modify nuit-eval (hide string-copy))
	define-record-types
	srfi-1
	(subset srfi-13 (string-copy))
	signals

	layout
	fs-object
	select-list
	plugin
	ncurses
	tty-debug)
  (files browse-directory-list))

;;; standard command plugin

(define-structure standard-command-plugin
    (export standard-command-plugin)
  (open nuit-eval
	plugin)
  (files std-command))

;;; fs-objects

(define-interface fs-object-interface
  (export make-fs-object
	  fs-object?
	  fs-object-name
	  fs-object-path
	  fs-object-info
	  fs-object-complete-path))

(define-structure fs-object fs-object-interface
  (open scheme
	(subset scsh (file-info))
	define-record-types)
  (files fs-object))

;;; browse list stuff

(define-interface select-list-interface
  (export make-select-list
	  select-list?
	  
	  make-unmarked-element
	  make-marked-element
	  element?

	  select-list-handle-key-press
	  unmark-current-line
	  mark-current-line
	  move-cursor-up
	  move-cursor-down
	  paint-selection-list
	  paint-selection-list-at
	  select-list-get-selection
	  select-list-selected-entry))

(define-structure select-list select-list-interface
  (open scheme
	srfi-1
	define-record-types
	signals
	
	tty-debug
	plugin
	layout
	ncurses)
  (files select-list))

;;; inspector

(define-interface nuit-inspector-interface
  (export inspect-value))

(define-structure nuit-inspector-plugin nuit-inspector-interface
  (open scheme
        inspector-internal
        continuations
        formats
        define-record-types
        srfi-1
        srfi-6
        display-conditions
        
	ncurses
        layout
        select-list
        tty-debug
        plugin)
  (files inspector))

;;; nuit evaluates the expressions entered into command buffer in this
;;; package

(define-structure nuit-eval
    (interface-of scheme-with-scsh)
  (open 
   (modify scheme-with-scsh
	   (rename (directory-files scsh-directory-files)))
   let-opt
   srfi-1
   fs-object
   pps)
  (files eval))

;;; nuit plug-in registration

(define-interface plugin-interface
  (export make-view-plugin
	  view-plugin?
	  view-plugin-fun
	  view-plugin-type-predicate

	  make-command-plugin
	  command-plugin?
	  command-plugin-command
	  command-plugin-completer
	  command-plugin-evaluater

	  register-plugin!

	  next-command-message?
	  next-command-string
	  next-command-message-parameters
	  next-command-message-width

	  init-with-result-message?
	  init-with-result-message-result
	  init-with-result-message-buffer

	  key-pressed-message?
	  key-pressed-message-result-buffer
	  key-pressed-message-result-object
	  key-pressed-message-key
	  key-pressed-message-prefix-key

	  print-message?
	  print-message-command-string
	  print-message-result-object
	  print-message-width

	  restore-message?
	  restore-message-command-string
	  restore-message-result-object

	  selection-message?
	  selection-message-command-string
	  selection-message-result-object

	  message-result-object
	  message-command-string))

(define-interface plugin-host-interface
  (export command-plugin-list
	  view-plugin-list
	  make-next-command-message
	  make-init-with-result-message
	  make-key-pressed-message
	  make-print-message
	  make-restore-message
	  make-selection-message))

(define-structures
  ((plugin plugin-interface)
   (plugin-host plugin-host-interface))
  (open scheme
	define-record-types
	let-opt
	signals)
  (files plugins))

;;; nuit 

(define-interface nuit-interface
  (export nuit))

(define-structure nuit nuit-interface    
  (open scheme-with-scsh
	external-calls
	define-record-types
	conditions
	signals 
	handle
	rt-modules
	ncurses
	srfi-1
	srfi-6
	srfi-13
	debugging
	inspect-exception
	rt-modules
	tty-debug
	fs-object
	plugin
	plugin-host
	layout
	pps
	history
	;; the following modules are plugins
	dirlist-view-plugin
	process-view-plugin
	standard-command-plugin
        nuit-inspector-plugin)
  (files nuit-engine
	 handle-fatal-error))