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minibuffer.lisp
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(in-package :med)
(defvar *minibuffer* (make-instance 'buffer))
(defvar *minibuffer-key-map* (make-hash-table))
(defvar *minibuffer-history* '())
(defvar *minibuffer-history-number* 0)
(defvar *minibuffer-completer* nil)
(defvar *minibuffer-completion-results* ())
(defvar *minibuffer-completion-results-number* 0)
(defun fix-minibuffer-point-position-hook ()
(when (mark< (buffer-point *minibuffer*)
(buffer-property *minibuffer* 'minibuffer-prompt-end))
(point-to-mark *minibuffer*
(buffer-property *minibuffer* 'minibuffer-prompt-end)))
(when (mark< (buffer-mark *minibuffer*)
(buffer-property *minibuffer* 'minibuffer-prompt-end))
(move-mark-to-mark (buffer-mark *minibuffer*)
(buffer-property *minibuffer* 'minibuffer-prompt-end))))
(defun minibuffer-finish-input-command ()
(move-end-of-buffer *minibuffer*)
(let ((string (buffer-string *minibuffer*
(buffer-property *minibuffer* 'minibuffer-prompt-end)
(buffer-point *minibuffer*))))
(when (> (length string) 0)
(push string *minibuffer-history*))
(setf *minibuffer-history-number 0)
(throw 'minibuffer-result string)))
(defun replace-minibuffer-string (string)
(move-end-of-line *minibuffer*)
(delete-region *minibuffer*
(buffer-property *minibuffer* 'minibuffer-prompt-end)
(buffer-point *minibuffer*))
(insert *minibuffer* string))
(defun minibuffer-previous-history-command ()
(when (< *minibuffer-history-number* (length *minibuffer-history*))
(replace-minibuffer-string (nth *minibuffer-history-number* *minibuffer-history*))
(incf *minibuffer-history-number*)))
(defun minibuffer-next-history-command ()
(when (> *minibuffer-history-number* 0)
(decf *minibuffer-history-number*)
(replace-minibuffer-string (nth *minibuffer-history-number* *minibuffer-history*))))
(defun read-from-minibuffer (prompt &key default completer)
"Read a string from the minibuffer."
(initialize-minibuffer-key-map *minibuffer-key-map*)
(let ((old-buffer (current-buffer *editor*)))
(when (eql old-buffer *minibuffer*)
(error "Recursive minibuffer read!"))
(unwind-protect
(progn
(setf *minibuffer*
(make-instance 'buffer
:key-map *minibuffer-key-map*
:post-command-hooks '(fix-minibuffer-point-position-hook)))
(setf (buffer-property *minibuffer* 'name) "*Minibuffer*")
(setf *minibuffer-completer* completer)
(switch-to-buffer *minibuffer*)
(insert *minibuffer* prompt)
(setf (buffer-property *minibuffer* 'minibuffer-prompt-end)
(copy-mark (buffer-point *minibuffer*) :left))
(when default (insert *minibuffer* default))
(catch 'minibuffer-result
(handler-case
(editor-loop)
(error (e)
(setf *minibuffer-history-number* 0)
(setf *minibuffer-completer* nil)
(setf *minibuffer-completion-number* 0)
(setf *minibuffer-completion-results* nil)
(error e)))))
(switch-to-buffer old-buffer))))x
(defun minibuffer-yes-or-no-p (&optional control &rest arguments)
(let ((prompt (apply 'format nil control arguments)))
(loop
(let ((line (read-from-minibuffer (format nil "~A (Yes or No) " prompt))))
(cond ((string-equal line "yes")
(return t))
((string-equal line "no")
(return nil)))))))
(defun minibuffer-y-or-n-p (&optional control &rest arguments)
(let* ((prompt (apply 'format nil control arguments))
(key-map (buffer-key-map *minibuffer*)))
(set-key #\y (lambda () (insert *minibuffer* #\y)
(minibuffer-finish-input-command)) key-map)
(set-key #\n (lambda () (insert *minibuffer* #\n)
(minibuffer-finish-input-command)) key-map)
(unwind-protect
(loop
(let ((line (read-from-minibuffer (format nil "~A (Y or N) " prompt))))
(remhash #\y key-map)
(remhash #\n key-map)
(cond ((string-equal line "y")
(return t))
((string-equal line "n")
(return nil)))))
(remhash #\y key-map)
(remhash #\n key-map))))
(defun minibuffer-complete-command ()
(when *minibuffer-completer*
(if (eql *last-command* 'minibuffer-complete-command)
(when (> (length *minibuffer-completion-results*) 0)
(delete-region *minibuffer*
(buffer-property *minibuffer* 'minibuffer-prompt-end)
(buffer-point *minibuffer*))
(setf *minibuffer-completion-results-number*
(mod (1+ *minibuffer-completion-results-number*)
(length *minibuffer-completion-results*)))
(insert *minibuffer*
(nth *minibuffer-completion-results-number*
*minibuffer-completion-results*)))
(let* ((text (buffer-string *minibuffer*
(buffer-property *minibuffer* 'minibuffer-prompt-end)
(buffer-point *minibuffer*)))
(results (funcall *minibuffer-completer* text)))
(when results
(delete-region *minibuffer*
(buffer-property *minibuffer* 'minibuffer-prompt-end)
(buffer-point *minibuffer*))
(insert *minibuffer* (car results)))
(setf *minibuffer-completion-results* results)
(setf *minibuffer-completion-results-number* 0)))))
(defun initialize-minibuffer-key-map (key-map)
(set-key #\Newline 'minibuffer-finish-input-command key-map)
(set-key #\C-M 'minibuffer-finish-input-command key-map)
(set-key #\M-P 'minibuffer-previous-history-command key-map)
(set-key #\M-N 'minibuffer-next-history-command key-map)
(set-key #\Tab 'minibuffer-complete-command key-map)
(set-key '(#\C-X #\C-F) nil key-map)
(set-key '(#\C-X #\C-S) nil key-map)
(set-key '(#\C-X #\C-W) nil key-map)
(set-key '(#\C-X #\k) nil key-map)
(set-key '(#\C-X #\b) nil key-map)
(set-key '(#\C-X #\C-B) nil key-map)
(set-key #\C-C nil key-map))