;;; poe-xemacs.el --- poe submodule for XEmacs -*-byte-compile-dynamic: t;-*-

;; Copyright (C) 1995 Free Software Foundation, Inc.
;; Copyright (C) 1995,1996,1997,1998 MORIOKA Tomohiko

;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
;; Keywords: emulation, compatibility, XEmacs

;; This file is part of APEL (A Portable Emacs Library).

;; This program 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.

;; This program 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 XEmacs; see the file COPYING.  If not, write to the Free
;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
;; 02111-1307, USA.

;;; Code:

;;; @ color
;;;

(defun-maybe set-cursor-color (color-name)
  "Set the text cursor color of the selected frame to COLOR.
When called interactively, prompt for the name of the color to use.
To get the frame's current cursor color, use `frame-parameters'."
  (interactive "sColor: ")
  (set-frame-property (selected-frame) 'cursor-color
                      (if (color-instance-p color-name)
                          color-name
                        (make-color-instance color-name))))


;;; @ face
;;;

(defalias-maybe 'face-list 'list-faces)

(or (memq 'underline (face-list))
    (and (fboundp 'make-face)
	 (make-face 'underline)))

(or (face-differs-from-default-p 'underline)
    (set-face-underline-p 'underline t))


;;; @ overlay
;;;

(condition-case nil
    (require 'overlay)
  (error (defalias 'make-overlay 'make-extent)
	 (defalias 'overlay-put 'set-extent-property)
	 (defalias 'overlay-buffer 'extent-buffer)
	 (defun move-overlay (extent start end &optional buffer)
	   (set-extent-endpoints extent start end)
	   )
	 ))


;;; @ dired
;;;

(defun-maybe dired-other-frame (dirname &optional switches)
  "\"Edit\" directory DIRNAME.  Like `dired' but makes a new frame."
  (interactive (dired-read-dir-and-switches "in other frame "))
  (switch-to-buffer-other-frame (dired-noselect dirname switches))
  )


;;; @ to avoid bug of XEmacs 19.14
;;;

(or (string-match "^../"
		  (file-relative-name "/usr/local/share" "/usr/local/lib"))
    ;; This function was imported from Emacs 19.33.
    (defun file-relative-name (filename &optional directory)
      "Convert FILENAME to be relative to DIRECTORY
(default: default-directory). [poe-xemacs.el]"
      (setq filename (expand-file-name filename)
	    directory (file-name-as-directory
		       (expand-file-name
			(or directory default-directory))))
      (let ((ancestor ""))
	(while (not (string-match (concat "^" (regexp-quote directory))
				  filename))
	  (setq directory (file-name-directory (substring directory 0 -1))
		ancestor (concat "../" ancestor)))
	(concat ancestor (substring filename (match-end 0)))))
    )


;;; @ for anything older than XEmacs 20.2
;;;

;; eval-after-load is not defined in XEmacs but after-load-alist is
;; usable.  See subr.el in XEmacs.

(defun-maybe eval-after-load (file form)
  "Arrange that, if FILE is ever loaded, FORM will be run at that time.
This makes or adds to an entry on `after-load-alist'.
If FILE is already loaded, evaluate FORM right now.
It does nothing if FORM is already on the list for FILE.
FILE should be the name of a library, with no directory name."
  ;; Make sure there is an element for FILE.
  (or (assoc file after-load-alist)
      (setq after-load-alist (cons (list file) after-load-alist)))
  ;; Add FORM to the element if it isn't there.
  (let ((elt (assoc file after-load-alist)))
    (or (member form (cdr elt))
	(progn
	  (nconc elt (list form))
	  ;; If the file has been loaded already, run FORM right away.
	  (and (assoc file load-history)
	       (eval form)))))
  form)

;; (defun-maybe eval-after-load (file form)
;;   (or (assoc file after-load-alist)
;;       (setq after-load-alist (cons (list file) after-load-alist)))
;;   (let ((elt (assoc file after-load-alist)))
;;     (or (member form (cdr elt))
;;         (nconc elt (list form))))
;;   form)


;;; @ Emacs 20.3 emulation
;;;

(defalias-maybe 'line-beginning-position 'point-at-bol)

(defalias-maybe 'line-end-position 'point-at-eol)


;;; @ end
;;;

(provide 'poe-xemacs)

;;; poe-xemacs.el ends here