;;; 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))

(define-structure layout layout-interface
  (open scheme
	srfi-6			;; basic string ports
	)
  (files layout))

;;; process viewer plugin

(define-structure process-view-plugin
    (export)
  (open scheme
	srfi-1
	formats
	pps
	plugin
	tty-debug)
  (files process))

;;; file list view plugin

(define-structure dirlist-view-plugin
    (export)
  (open scheme-with-scsh
	define-record-types
	layout
	fs-object
	srfi-1
	plugin
	ncurses
	tty-debug)
  (files browse-directory-list))

;;; browse-list plugin

(define-structure browse-list-plugin
    (export)
  (open scheme
	define-record-types
	ncurses
	plugin
	layout)
  (files browse-list))

;;; fs-objects

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

(define-structure fs-object fs-object-interface
  (open scheme
	define-record-types)
  (files fs-object))

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

(define-structure nuit-eval
    (export)
  (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-plugin
	  plugin?
	  plugin-command
	  plugin-fun
	  plugin-type-predicate
	  register-plugin!

	  make-print-object
	  print-object?
	  print-object-pos-y
	  print-object-pos-x
	  print-object-text
	  print-object-highlighted-lines
	  print-object-marked-lines

	  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-width

	  key-pressed-message?
	  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 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
	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
	browse-list-plugin
	dirlist-view-plugin
	process-view-plugin)
  (files nuit-engine
	 handle-fatal-error))