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qpfile-compl.el
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Lisp/Scheme
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1992-05-26
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2KB
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69 lines
;; SCCS: @(#)89/11/20 qpfile-compl.el 1.2
;; file-compl.el
;; filename completion for anywhere in Emacs
;; Paul Davis <davis%scr.slb.com@relay.cs.net> July 1988
;; Copyright (C) Schlumberger Cambridge Research, 1989
;;
;; perhaps better to do this at the source level, but its
;; quick enough and a fair bit more obvious whats going on.
(defvar not-filename-regexp "\\(^\\|[] ^<>\"'`?$%{}|&*()#!@^\;\t\n]\\)"
"grouped regexp specifying characters considered to be excluded
from filenames. Based on csh special characters, coupled with a
brief consideration of C and Lisp syntax.")
(defun shell-filename-complete ()
(interactive)
(let* ((filename (expand-file-name (grab-filename)))
(partial-name (file-name-nondirectory filename)))
(if (null (setq directory (file-name-directory filename)))
(error "no such directory"))
(if (not (null
(setq completion-list
(mapcar 'list
(file-name-all-completions
partial-name directory)))))
(progn
(setq completion (try-completion partial-name completion-list))
(cond ((eq completion t))
;; probably always grabbed by try-completion but throw it in anyway...
((null completion)
(message "No such file or directory")
(ding))
((not (string= partial-name completion))
(delete-region
(save-excursion
(re-search-backward partial-name
(save-excursion
(beginning-of-line)(point))) (point))
(point))
(insert completion))
(t
(message "Making completion list...")
(let ((list (all-completions partial-name completion-list)))
(with-output-to-temp-buffer "*Help*"
(display-completion-list list))
(message "Making completion list... done")))))
(progn
(message "No such file or directory")
(ding)))))
(defun grab-filename ()
"Gets the filename preceeding point. We have to assume
something about characters not legal in filenames, because Un*x
only disallows / and NULL. This is determined by not-filename-regexp,
which is a regexp specifying a set of characters NOT legal in
filenames. It might be nice to add things to mode hooks to set
this for different modes, but the default is a guess at one
that should be reasonably general."
(buffer-substring
(save-excursion
(re-search-backward not-filename-regexp (point-min) t)
(if (bolp)
(point)
(1+ (point))))
(point)))