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(require 'slime)
(require 'cl-lib)
(defvar slime-c-p-c-init-undo-stack nil)
(define-slime-contrib slime-c-p-c
"ILISP style Compound Prefix Completion."
(:authors "Luke Gorrie <luke@synap.se>"
"Edi Weitz <edi@agharta.de>"
"Matthias Koeppe <mkoeppe@mail.math.uni-magdeburg.de>"
"Tobias C. Rittweiler <tcr@freebits.de>")
(:license "GPL")
(:slime-dependencies slime-parse slime-editing-commands slime-autodoc)
(:swank-dependencies swank-c-p-c)
(:on-load
(push
`(progn
(remove-hook 'slime-completion-at-point-functions
#'slime-c-p-c-completion-at-point)
(remove-hook 'slime-connected-hook 'slime-c-p-c-on-connect)
,@(when (featurep 'slime-repl)
`((define-key slime-mode-map "\C-c\C-s"
',(lookup-key slime-mode-map "\C-c\C-s"))
(define-key slime-repl-mode-map "\C-c\C-s"
',(lookup-key slime-repl-mode-map "\C-c\C-s")))))
slime-c-p-c-init-undo-stack)
(add-hook 'slime-completion-at-point-functions
#'slime-c-p-c-completion-at-point)
(define-key slime-mode-map "\C-c\C-s" 'slime-complete-form)
(when (featurep 'slime-repl)
(define-key slime-repl-mode-map "\C-c\C-s" 'slime-complete-form)))
(:on-unload
(while slime-c-p-c-init-undo-stack
(eval (pop slime-c-p-c-init-undo-stack)))))
(defcustom slime-c-p-c-unambiguous-prefix-p t
"If true, set point after the unambigous prefix.
If false, move point to the end of the inserted text."
:type 'boolean
:group 'slime-ui)
(defcustom slime-complete-symbol*-fancy nil
"Use information from argument lists for DWIM'ish symbol completion."
:group 'slime-mode
:type 'boolean)
;; FIXME: this is the old code to display completions. Remove it once
;; `slime-complete-symbol*' and `slime-fuzzy-complete-symbol' can be
;; used together with `completion-at-point'.
(defvar slime-completions-buffer-name "*Completions*")
;; FIXME: can probably use quit-window instead
(make-variable-buffer-local
(defvar slime-complete-saved-window-configuration nil
"Window configuration before we show the *Completions* buffer.
This is buffer local in the buffer where the completion is
performed."))
(make-variable-buffer-local
(defvar slime-completions-window nil
"The window displaying *Completions* after saving window configuration.
If this window is no longer active or displaying the completions
buffer then we can ignore `slime-complete-saved-window-configuration'."))
(defun slime-complete-maybe-save-window-configuration ()
"Maybe save the current window configuration.
Return true if the configuration was saved."
(unless (or slime-complete-saved-window-configuration
(get-buffer-window slime-completions-buffer-name))
(setq slime-complete-saved-window-configuration
(current-window-configuration))
t))
(defun slime-complete-delay-restoration ()
(add-hook 'pre-command-hook
'slime-complete-maybe-restore-window-configuration
'append
'local))
(defun slime-complete-forget-window-configuration ()
(setq slime-complete-saved-window-configuration nil)
(setq slime-completions-window nil))
(defun slime-complete-restore-window-configuration ()
"Restore the window config if available."
(remove-hook 'pre-command-hook
'slime-complete-maybe-restore-window-configuration)
(when (and slime-complete-saved-window-configuration
(slime-completion-window-active-p))
(save-excursion (set-window-configuration
slime-complete-saved-window-configuration))
(setq slime-complete-saved-window-configuration nil)
(when (buffer-live-p slime-completions-buffer-name)
(kill-buffer slime-completions-buffer-name))))
(defun slime-complete-maybe-restore-window-configuration ()
"Restore the window configuration, if the following command
terminates a current completion."
(remove-hook 'pre-command-hook
'slime-complete-maybe-restore-window-configuration)
(condition-case err
(cond ((cl-find last-command-event "()\"'`,# \r\n:")
(slime-complete-restore-window-configuration))
((not (slime-completion-window-active-p))
(slime-complete-forget-window-configuration))
(t
(slime-complete-delay-restoration)))
(error
;; Because this is called on the pre-command-hook, we mustn't let
;; errors propagate.
(message "Error in slime-complete-restore-window-configuration: %S"
err))))
(defun slime-completion-window-active-p ()
"Is the completion window currently active?"
(and (window-live-p slime-completions-window)
(equal (buffer-name (window-buffer slime-completions-window))
slime-completions-buffer-name)))
(defun slime-display-completion-list (completions start end)
(let ((savedp (slime-complete-maybe-save-window-configuration)))
(with-output-to-temp-buffer slime-completions-buffer-name
(display-completion-list completions)
(with-current-buffer standard-output
(setq completion-base-position (list start end))
(set-syntax-table lisp-mode-syntax-table)))
(when savedp
(setq slime-completions-window
(get-buffer-window slime-completions-buffer-name)))))
(defun slime-display-or-scroll-completions (completions start end)
(cond ((and (eq last-command this-command)
(slime-completion-window-active-p))
(slime-scroll-completions))
(t
(slime-display-completion-list completions start end)))
(slime-complete-delay-restoration))
(defun slime-scroll-completions ()
(let ((window slime-completions-window))
(with-current-buffer (window-buffer window)
(if (pos-visible-in-window-p (point-max) window)
(set-window-start window (point-min))
(save-selected-window
(select-window window)
(scroll-up))))))
(defun slime-minibuffer-respecting-message (format &rest format-args)
"Display TEXT as a message, without hiding any minibuffer contents."
(let ((text (format " [%s]" (apply #'format format format-args))))
(if (minibuffer-window-active-p (minibuffer-window))
(minibuffer-message text)
(message "%s" text))))
(defun slime-maybe-complete-as-filename ()
"If point is at a string starting with \", complete it as filename.
Return nil if point is not at filename."
(when (save-excursion (re-search-backward "\"[^ \t\n]+\\="
(max (point-min)
(- (point) 1000)) t))
(let ((comint-completion-addsuffix '("/" . "\"")))
(comint-replace-by-expanded-filename)
t)))
(defun slime-complete-symbol* ()
"Expand abbreviations and complete the symbol at point."
;; NB: It is only the name part of the symbol that we actually want
;; to complete -- the package prefix, if given, is just context.
(or (slime-maybe-complete-as-filename)
(slime-expand-abbreviations-and-complete)))
(defun slime-c-p-c-completion-at-point ()
#'slime-complete-symbol*)
;; FIXME: factorize
(defun slime-expand-abbreviations-and-complete ()
(let* ((end (move-marker (make-marker) (slime-symbol-end-pos)))
(beg (move-marker (make-marker) (slime-symbol-start-pos)))
(prefix (buffer-substring-no-properties beg end))
(completion-result (slime-contextual-completions beg end))
(completion-set (cl-first completion-result))
(completed-prefix (cl-second completion-result)))
(if (null completion-set)
(progn (slime-minibuffer-respecting-message
"Can't find completion for \"%s\"" prefix)
(ding)
(slime-complete-restore-window-configuration))
;; some XEmacs issue makes this distinction necessary
(cond ((> (length completed-prefix) (- end beg))
(goto-char end)
(insert-and-inherit completed-prefix)
(delete-region beg end)
(goto-char (+ beg (length completed-prefix))))
(t nil))
(cond ((and (member completed-prefix completion-set)
(slime-length= completion-set 1))
(slime-minibuffer-respecting-message "Sole completion")
(when slime-complete-symbol*-fancy
(slime-complete-symbol*-fancy-bit))
(slime-complete-restore-window-configuration))
;; Incomplete
(t
(when (member completed-prefix completion-set)
(slime-minibuffer-respecting-message
"Complete but not unique"))
(when slime-c-p-c-unambiguous-prefix-p
(let ((unambiguous-completion-length
(cl-loop for c in completion-set
minimizing (or (cl-mismatch completed-prefix c)
(length completed-prefix)))))
(goto-char (+ beg unambiguous-completion-length))))
(slime-display-or-scroll-completions completion-set
beg
(max (point) end)))))))
(defun slime-complete-symbol*-fancy-bit ()
"Do fancy tricks after completing a symbol.
\(Insert a space or close-paren based on arglist information.)"
(let ((arglist (slime-retrieve-arglist (slime-symbol-at-point))))
(unless (eq arglist :not-available)
(let ((args
;; Don't intern these symbols
(let ((obarray (make-vector 10 0)))
(cdr (read arglist))))
(function-call-position-p
(save-excursion
(backward-sexp)
(equal (char-before) ?\())))
(when function-call-position-p
(if (null args)
(execute-kbd-macro ")")
(execute-kbd-macro " ")
(when (and (slime-background-activities-enabled-p)
(not (minibuffer-window-active-p (minibuffer-window))))
(slime-echo-arglist))))))))
(cl-defun slime-contextual-completions (beg end)
"Return a list of completions of the token from BEG to END in the
current buffer."
(let ((token (buffer-substring-no-properties beg end)))
(cond
((and (< beg (point-max))
(string= (buffer-substring-no-properties beg (1+ beg)) ":"))
;; Contextual keyword completion
(let ((completions
(slime-completions-for-keyword token
(save-excursion
(goto-char beg)
(slime-parse-form-upto-point)))))
(when (cl-first completions)
(cl-return-from slime-contextual-completions completions))
;; If no matching keyword was found, do regular symbol
;; completion.
))
((and (>= (length token) 2)
(string= (cl-subseq token 0 2) "#\\"))
;; Character name completion
(cl-return-from slime-contextual-completions
(slime-completions-for-character token))))
;; Regular symbol completion
(slime-completions token)))
(defun slime-completions (prefix)
(slime-eval `(swank:completions ,prefix ',(slime-current-package))))
(defun slime-completions-for-keyword (prefix buffer-form)
(slime-eval `(swank:completions-for-keyword ,prefix ',buffer-form)))
(defun slime-completions-for-character (prefix)
(cl-labels ((append-char-syntax (string) (concat "#\\" string)))
(let ((result (slime-eval `(swank:completions-for-character
,(cl-subseq prefix 2)))))
(when (car result)
(list (mapcar #'append-char-syntax (car result))
(append-char-syntax (cadr result)))))))
;;; Complete form
(defun slime-complete-form ()
"Complete the form at point.
This is a superset of the functionality of `slime-insert-arglist'."
(interactive)
;; Find the (possibly incomplete) form around point.
(let ((buffer-form (slime-parse-form-upto-point)))
(let ((result (slime-eval `(swank:complete-form ',buffer-form))))
(if (eq result :not-available)
(error "Could not generate completion for the form `%s'" buffer-form)
(progn
(just-one-space (if (looking-back "\\s(" (1- (point)))
0
1))
(save-excursion
(insert result)
(let ((slime-close-parens-limit 1))
(slime-close-all-parens-in-sexp)))
(save-excursion
(backward-up-list 1)
(indent-sexp)))))))
(provide 'slime-c-p-c)