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shell.lisp
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shell.lisp
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;;; shell.lisp --- editor ui
;; Copyright (C) 2012, 2013 David O'Toole
;; Author: David O'Toole <dto@xelf.io>
;; Keywords:
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
(in-package :xelf)
;;; Message output widget
(define-block messenger :category :terminal :messages nil)
(define-method initialize messenger (&optional messages)
(cond
((stringp messages)
(setf %messages (list messages)))
((consp messages)
(setf %messages messages))))
(define-method add-message messenger (message-string)
(assert (stringp message-string))
(push message-string %messages))
(defparameter *messenger-columns* 80)
(defparameter *messenger-rows* 7)
(define-method get-messages messenger ()
(or %messages *message-history*))
(define-method layout messenger ()
(setf %height (+ (* (font-height *font*) *messenger-rows*)
(dash 4)))
(let ((width 0))
(block measuring
(dotimes (n *messenger-rows*)
(if (<= (length (get-messages self)) n)
(return-from measuring nil)
(setf width
(max width
(font-text-width
(nth n (get-messages self))
*block-font*))))))
(setf %width (+ width (dash 5)))))
(defparameter *messenger-color* "gray80")
(define-method draw messenger ()
;; (draw-background self)
(with-fields (x y width height) self
(let ((y0 (+ y height (- 0 (font-height *font*) (dash 2))))
(x0 (+ x (dash 3))))
(dotimes (n *messenger-rows*)
(unless (<= (length (get-messages self)) n)
(draw-string (nth n (get-messages self))
x0 y0
:color *messenger-color*
:font *block-font*)
(decf y0 (font-height *font*)))))))
;;; Modeline
(defun-memo modeline-position-string (x y)
(:key #'identity :test 'equal :validator #'identity)
(format nil "X:~S Y:~S" x y))
(defun-memo modeline-database-string (local global)
(:key #'identity :test 'equal :validator #'identity)
(format nil "~S/~S objects" local global))
(define-block-macro modeline
(:super phrase
:fields
((orientation :initform :horizontal)
(no-background :initform t)
(spacing :initform 4))
:inputs (:buffer-id (new 'label :read-only t)
:position (new 'label :read-only t)
:mode (new 'label :read-only t)
:objects (new 'label :read-only t))))
(define-method update modeline ()
(mapc #'pin %inputs)
(set-value %%buffer-id (or (%buffer-name (current-buffer)) "*untitled-buffer*"))
(set-value %%objects (modeline-database-string (hash-table-count (%objects (current-buffer)))
(hash-table-count *database*)))
(set-value %%position
(modeline-position-string
(%window-x (current-buffer))
(%window-y (current-buffer))))
(set-value %%mode
(if (current-buffer)
(if (field-value :paused (current-buffer))
"(paused)"
"(playing)")
"(empty)")))
(define-method draw modeline ()
(with-fields (x y width height) self
(draw%super self)
(draw-line x y (+ x width) y :color "gray50")))
;;; Shell prompt
(define-block (shell-prompt :super entry)
(result :initform nil)
(background :initform nil))
(define-method can-pick shell-prompt () nil)
(define-method pick shell-prompt ()
nil)
(define-method evaluate-expression shell-prompt (sexp0)
(with-fields (result) self
(let ((sexp (first sexp0)))
(if (and (not (null sexp))
(not (keywordp sexp))
(symbolp sexp))
(setf result (new sexp))
(setf result (eval sexp))))))
(define-method enter shell-prompt (&optional no-clear)
(prompt%enter self)
(with-fields (result) self
(when result
(replace-output (shell) (list (make-phrase result))))))
(define-method lose-focus shell-prompt ()
(cancel-editing self))
;;; Command forms
(defun-memo command-name-string (thing)
(:key #'first :test 'equal :validator #'identity)
(let ((name (etypecase thing
(symbol (symbol-name thing))
(string thing))))
(coerce
(string-capitalize
(substitute #\Space #\-
(string-trim " " name)))
'simple-string)))
(defun-memo command-argument-string (thing)
(:key #'first :test 'equal :validator #'identity)
(concatenate 'string (command-name-string thing) ": "))
(defun arglist-input-forms (argument-forms)
(mapcar #'(lambda (f)
`(make-sentence
(list
(new 'keyword :value ,(make-keyword (first f)) :read-only t)
(new 'expression :value ,(second f) :read-only nil))))
argument-forms))
(defun command-inputs (name arglist)
`((let ((label (new 'label :read-only t :font "sans-condensed-bold-18")))
(prog1 label (set-value label ,(command-name-string (symbol-name name)))))
(make-paragraph (list ,@(arglist-input-forms arglist)))))
(defmacro define-command (name arglist &body body)
`(progn
(defun ,name (&key ,@arglist) ,@body)
(export ',name)
(define-block-macro ,name
(:super phrase
:fields ((orientation :initform :vertical))
:inputs ,(command-inputs name arglist)))
(define-method evaluate ,name ()
;; call the command function
(apply #'funcall #',name
;; with the evaluated results of
(mapcar #'evaluate
;; all the argument names/values
(mapcan #'identity
(mapcar #'%inputs
;; from the dialog box
(%inputs (second %inputs)))))))))
;;; The shell is a command prompt and message output area.
(defparameter *minimum-shell-width* 400)
(defparameter *shell-background-color* "gray20")
(defparameter *default-command-prompt-string* "> ")
(defun make-label (string &optional font)
(let ((label (new 'label)))
(prog1 label
(set-value label string)
(set-read-only label t)
(when font
(setf (%font label) font)))))
(define-block-macro shell
(:super phrase
:fields
((orientation :initform :vertical)
(frozen :initform t)
(category :initform :system)
(spacing :initform 4)
;;
(entry-index :initform 0)
(target-x :initform 0)
(target-y :initform 0))
:inputs
(:output (new 'phrase)
:modeline (new 'modeline)
:command-area (make-sentence
(list
(make-label *default-command-prompt-string*)
(new 'shell-prompt))))))
(define-method drag shell (x y)
(with-fields (target-x target-y) self
(setf target-x (- x (window-x)))
(setf target-y (- y (window-y)))
(move-to self x y)))
(define-method layout shell ()
(with-fields (target-x target-y) self
(move-to self
(+ target-x (window-x))
(+ target-y (window-y)))
(phrase%layout self)))
(define-method insert-output shell (item)
(unfreeze %%output)
(accept %%output item)
(freeze %%output))
(define-method destroy-output shell ()
(mapc #'destroy (%inputs %%output))
(setf (%inputs %%output) nil))
(define-method replace-output shell (items)
(destroy-output self)
(dolist (item items)
(insert-output self item)))
(define-method hit shell (x y)
(when (within-extents x y %x %y (+ %x %width) (+ %y %height))
(flet ((try (thing)
(hit thing x y)))
(or (some #'try (%inputs %%output))
self))))
(define-method tap shell (x y)
(focus-on-entry self))
(define-method alternate-tap shell (x y) nil)
(define-method get-prompt-label shell () (first (%inputs %%command-area)))
(define-method set-prompt-label shell (label) (set-value (get-prompt-label self) label))
(define-method get-prompt shell () (second (%inputs %%command-area)))
(define-method set-prompt-line shell (line) (set-value (get-prompt self) line))
(define-method get-modeline shell () %%modeline)
(define-method get-output shell () %%output)
(define-method get-output-items shell ()
(let ((phrase (first (%inputs (get-output self)))))
(when phrase (%inputs phrase))))
(define-method get-dialog shell ()
(first (%inputs (get-output self))))
(define-method get-argument-phrases shell ()
(let ((container (second (get-output-items self))))
(when (xelfp container) (%inputs container))))
(define-method get-entries shell ()
(cons (get-prompt self)
(mapcar #'second (mapcar #'%inputs (get-argument-phrases self)))))
(define-method evaluate-output shell ()
(replace-output self (list (make-phrase (evaluate (get-dialog self))))))
(define-method current-entry shell ()
(let ((entries (get-entries self)))
(with-fields (entry-index) self
(setf entry-index (mod entry-index (length entries)))
(nth entry-index entries))))
(define-method focus-on-entry shell ()
(let ((entry (current-entry self)))
(set-read-only entry nil)
(grab-focus entry)
(end-of-line entry)))
(define-method next-entry shell ()
(incf %entry-index)
(focus-on-entry self))
(define-method previous-entry shell ()
(decf %entry-index)
(focus-on-entry self))
(define-method draw shell ()
(with-style :rounded
(draw-background self))
(mapc #'draw %inputs))
(defun shell () *shell*)
(defun shell-prompt () (get-prompt (shell)))
(defun shell-modeline () (get-modeline (shell)))
(defun shell-output () (get-output (shell)))
(defun shell-insert-output (object) (insert-output (shell) object))
(defun shell-destroy-output () (destroy-output (shell)))
(defun shell-evaluate-output () (evaluate-output (shell)))
;;; shell.lisp ends here