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;; prompt-extras.jl -- more esoteric prompt variants
;; $Id: prompt-extras.jl,v 1.7 2000/09/08 15:14:02 john Exp $
;; Copyright (C) 2000 John Harper <john@dcs.warwick.ac.uk>
;; This file is part of sawmill.
;; sawmill 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 2, or (at your option)
;; any later version.
;; sawmill 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 sawmill; see the file COPYING. If not, write to
;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
;; Most of this is originally from Jade
(declare (in-module sawfish.wm.util.prompt))
(require 'rep.io.files)
;;; completion/validation functions
(define (prompt-complete-filename word)
(let* ((path (file-name-directory word))
(file (file-name-nondirectory word))
(files (directory-files path)))
(mapcar (lambda (x)
(when (file-directory-p (setq x (concat path x)))
(setq x (concat x ?/)))
x)
(delete-if (lambda (f)
(or (not (string-head-eq f file))
(string-match prompt-file-exclude f)))
files))))
(define (prompt-validate-filename name)
(and (file-exists-p name) name))
(define (prompt-complete-directory word)
(setq word (expand-file-name word))
(let ((path (file-name-directory word))
(file (file-name-nondirectory word)))
(delq nil
(mapcar (lambda (x)
(when (file-directory-p (concat path x))
(concat path x ?/)))
(delete-if (lambda (f)
(not (string-head-eq f file)))
(directory-files path))))))
(define (prompt-validate-directory name)
(and (file-directory-p name) name))
(define (prompt-abbreviate-filename name)
(let ((abbrev (file-name-nondirectory name)))
(if (string= abbrev "")
(file-name-as-directory
(file-name-nondirectory (directory-file-name name)))
abbrev)))
(define (prompt-complete-from-list word)
(let (out)
(mapc (lambda (x)
(when (string-match (concat ?^ (quote-regexp word))
x nil prompt-list-fold-case)
(setq out (cons x out)))) prompt-list)
out))
(define (prompt-validate-from-list name)
(if (null prompt-list-fold-case)
(and (member name prompt-list) name)
(catch 'exit
(mapc (lambda (x)
(when (string-match (concat ?^ (quote-regexp name) ?$) x nil t)
(throw 'exit name))) prompt-list))))
;;; entry points
(define (prompt-for-file #!optional title existing start default)
"Prompt for a file, if EXISTING is t only files which exist are
allowed to be entered."
(unless (stringp title)
(setq title "Enter filename:"))
(setq start (if (stringp start)
(expand-file-name start)
(file-name-as-directory default-directory)))
(let* ((prompt-completion-fun prompt-complete-filename)
(prompt-validation-fun (and existing prompt-validate-filename))
(prompt-abbrev-fun prompt-abbreviate-filename)
(str (prompt title start)))
(when (and (string= str "") default)
(setq str default))
str))
(define (prompt-for-directory #!optional title existing start default)
"Prompt for a directory, if EXISTING is t only files which exist are
allowed to be entered."
(unless (stringp title)
(setq title "Enter filename:"))
(unless (stringp start)
(setq start (file-name-as-directory default-directory)))
(let* ((prompt-completion-fun prompt-complete-directory)
(prompt-validation-fun (and existing prompt-validate-directory))
(prompt-abbrev-fun prompt-abbreviate-filename)
(str (prompt title start)))
(when (and (string= str "") default)
(setq str default))
str))
(define (prompt-from-list options title #!optional start dont-validate)
"Return a selected choice from the list of options (strings) OPTIONS.
PROMPT is the title displayed, START the starting choice.
Unless DONT-VALIDATE is t, only a member of PROMPT-LIST will be returned."
(let ((prompt-list options)
(prompt-completion-fun prompt-complete-from-list)
(prompt-validation-fun (if dont-validate
nil
prompt-validate-from-list)))
(prompt title start)))
(define (prompt-for-string #!optional title start)
(let ((prompt-completion-fun prompt-complete-filename)
(prompt-validation-fun nil))
(prompt (or title "Enter string: ") start)))
(define (prompt-for-number #!optional title)
(let (num)
(while (not (numberp num))
(setq num (read-from-string (prompt (or title "Enter number: ")))))
num))
(define (pwd-prompt title)
(let ((prompt-display-fun (lambda (string)
(make-string (length string) ?*)))
(prompt-history nil))
(prompt-for-string title)))
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