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complete.lisp
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complete.lisp
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;;;; Copyright (c) 2003, 2004 Nikodemus Siivola, Julian Squires
;;;;
;;;; Permission is hereby granted, free of charge, to any person obtaining
;;;; a copy of this software and associated documentation files (the
;;;; "Software"), to deal in the Software without restriction, including
;;;; without limitation the rights to use, copy, modify, merge, publish,
;;;; distribute, sublicense, and/or sell copies of the Software, and to
;;;; permit persons to whom the Software is furnished to do so, subject to
;;;; the following conditions:
;;;;
;;;; The above copyright notice and this permission notice shall be included
;;;; in all copies or substantial portions of the Software.
;;;;
;;;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
;;;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
;;;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
;;;; IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
;;;; CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
;;;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
;;;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
(in-package :linedit)
(defun pathname-directory-pathname (pathname)
(make-pathname :name nil :type nil
:defaults pathname))
(defun underlying-directory-p (pathname)
(case (file-kind pathname)
(:directory t)
(:symbolic-link
(file-kind (merge-pathnames (read-link pathname) pathname)))))
(defun logical-pathname-p (pathname)
(typep (pathname pathname) 'logical-pathname))
(defun logical-pathname-complete (string)
(values (list string) (length string)))
#+nil
(defun logical-pathname-complete (string)
(let* ((host (pathname-host string))
(rest (subseq string (1+ (mismatch host string))))
(rules (remove-if-not (lambda (rule)
(mismatch rest (first rule)))))
(physicals (mapcar (lambda (rule)
(namestring
(translate-pathname string
(first rule)
(second rule))))
rules))
(matches (apply #'append (mapcar #'directory-complete physicals)))
(logicals (mapcar (lambda (physical)
(let ((rule (find-if (lambda (rule)
(misma
(flet ((maybe-translate-logical-pathname (string)
(handler-case
(translate-logical-pathname string)
(error ()
(return-from logical-pathname-complete (values nil 0))))))
(directory-complete
(namestring
(maybe-translate-logical-pathname string)))))
;; FIXME: refactor chared code with directory complete
(loop with all
with common
with max
for cand in matches
do (let ((diff (mismatch string cand)))
(when (and diff (> diff (length string)))
(setf common (if common
(subseq common 0 (mismatch common cand))
cand)
max (max max (length cand))
all (cons cand all))))
finally (if (or (null common)
(<= (length common) (length string)))
(return (values all max))
(return (values (list common) (length common))))))))))))))))
;;; We can't easily do zsh-style tab-completion of ~us into ~user, but
;;; at least we can expand ~ and ~user. The other bug here at the
;;; moment is that ~nonexistant will complete to the same as ~.
(defun tilde-expand-string (string)
"Returns the supplied string, with a prefix of ~ or ~user expanded
to the appropriate home directory."
(if (and (> (length string) 0)
(eql (schar string 0) #\~))
(flet ((chop (s)
(subseq s 0 (1- (length s)))))
(let* ((slash-index (loop for i below (length string)
when (eql (schar string i) #\/)
return i))
(suffix (and slash-index (subseq string slash-index)))
(uname (subseq string 1 slash-index))
(homedir (or (cdr (assoc :home (user-info uname)))
(chop (namestring
(or (probe-file (user-homedir-pathname))
(return-from tilde-expand-string
string)))))))
(concatenate 'string homedir (or suffix ""))))
string))
(defun directory-complete (string)
(declare (simple-string string))
(let* ((common nil)
(all nil)
(max 0)
(string (tilde-expand-string string))
(dir (pathname-directory-pathname string))
(namefun (if (relative-pathname-p string)
#'namestring
(lambda (x) (namestring (merge-pathnames x))))))
(unless (and (underlying-directory-p dir)
(not (wild-pathname-p dir)))
(return-from directory-complete (values nil 0)))
(with-directory-iterator (next dir)
(loop for entry = (next)
while entry
do (let* ((full (funcall namefun entry))
(diff (mismatch string full)))
(dbg "~& completed: ~A, diff: ~A~%" full diff)
(unless (and diff (< diff (length string)))
(dbg "~& common ~A mismatch ~A~&" common
(mismatch common full))
(setf common (if common
(subseq common 0 (mismatch common full))
full)
max (max max (length full))
all (cons full all))))))
(dbg "~&common: ~A~%" common)
(if (or (null common)
(<= (length common) (length string)))
(values all max)
(values (list common) (length common)))))
(defun lisp-complete (string editor)
(declare (simple-string string))
(when (plusp (length string))
(if (in-quoted-string-p editor)
(if (logical-pathname-p string)
(logical-pathname-complete string)
(directory-complete string))
(let* ((length (length string))
(first-colon (position #\: string))
(last-colon (position #\: string :from-end t))
(state (and first-colon
(if (< first-colon last-colon)
:internal
:external)))
(package (and first-colon
(find-package (if (plusp first-colon)
(string-upcase
(subseq string 0 first-colon))
:keyword))))
(hash (make-hash-table :test #'equal))
(common nil)
(max-len 0))
(labels ((stringify (symbol)
(if (upper-case-p (schar string 0))
(string symbol)
(string-downcase (string symbol))))
(push-name (name)
(setf common (if common
(subseq name 0 (mismatch common name))
name)
max-len (max max-len (length name))
(gethash name hash) name))
(select-symbol (symbol match)
(let ((name (stringify symbol))
(end (length match)))
(when (and (> (length name) end) ; Skip indetical
(equal match (subseq name 0 end)))
(push-name (concat string (subseq name end)))))))
;; Skip empty strings
(when (plusp length)
(if package
;; Symbols with explicit package prefixes.
(let* ((start (1+ last-colon))
(match (subseq string start)))
(ecase state
(:internal (do-internal-symbols (sym package)
(select-symbol sym match)))
(:external (do-external-symbols (sym package)
(select-symbol sym match)))))
;; Symbols without explicit package prefix + packges
(dolist (package (list-all-packages))
(if (eq *package* package)
(do-symbols (sym)
(select-symbol sym string))
;; Package names
(dolist (name (cons (package-name package)
(package-nicknames package)))
(select-symbol name string))))))
;; Return list of matches to caller
(if (> (length common) (length string))
(values (list common) (length common))
(let (list)
(maphash (lambda (key val)
(declare (ignore val))
(push key list))
hash)
(values list max-len))))))))