lisp/net/eudc-hotlist.el

   1 ;;; eudc-hotlist.el --- hotlist management for EUDC
   2
   3 ;; Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
   4
   5 ;; Author: Oscar Figueiredo <oscar@xemacs.org>
   6 ;; Maintainer: Oscar Figueiredo <oscar@xemacs.org>
   7 ;; Keywords: help
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software; you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation; either version 2, or (at your option)
  14 ;; any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  24 ;; Boston, MA 02111-1307, USA.
  25
  26 ;;; Commentary:
  27
  28 ;;; Usage:
  29 ;;    See the corresponding info file
  30
  31 ;;; Code:
  32
  33 (require 'eudc)
  34
  35 (defvar eudc-hotlist-menu nil)
  36 (defvar eudc-hotlist-mode-map nil)
  37 (defvar eudc-hotlist-list-beginning nil)
  38
  39 (defun eudc-hotlist-mode ()
  40   "Major mode used to edit the hotlist of servers.
  41
  42 These are the special commands of this mode:
  43     a -- Add a new server to the list.
  44     d -- Delete the server at point from the list.
  45     s -- Select the server at point.
  46     t -- Transpose the server at point and the previous one
  47     q -- Commit the changes and quit.
  48     x -- Quit without commiting the changes."
  49   (interactive)
  50   (kill-all-local-variables)
  51   (setq major-mode 'eudc-hotlist-mode)
  52   (setq mode-name "EUDC-Servers")
  53   (use-local-map eudc-hotlist-mode-map)
  54   (setq mode-popup-menu eudc-hotlist-menu)
  55   (when (and eudc-xemacs-p
  56              (featurep 'menubar))
  57     (set-buffer-menubar current-menubar)
  58     (add-submenu nil (cons "EUDC-Hotlist" (cdr (cdr eudc-hotlist-menu)))))
  59   (setq buffer-read-only t))
  60
  61 ;;;###autoload
  62 (defun eudc-edit-hotlist ()
  63   "Edit the hotlist of directory servers in a specialized buffer."
  64   (interactive)
  65   (let ((proto-col 0)
  66         gap)
  67     (switch-to-buffer (get-buffer-create "*EUDC Servers*"))
  68     (setq buffer-read-only nil)
  69     (erase-buffer)
  70     (mapcar (function
  71              (lambda (entry)
  72                (setq proto-col (max (length (car entry)) proto-col))))
  73             eudc-server-hotlist)
  74     (setq proto-col (+ 3 proto-col))
  75     (setq gap (make-string (- proto-col 6) ?\ ))
  76     (insert "              EUDC Servers\n"
  77             "              ============\n"
  78             "\n"
  79             "Server" gap "Protocol\n"
  80             "------" gap "--------\n"
  81             "\n")
  82     (setq eudc-hotlist-list-beginning (point))
  83     (mapcar '(lambda (entry)
  84              (insert (car entry))
  85              (indent-to proto-col)
  86              (insert (symbol-name (cdr entry)) "\n"))
  87           eudc-server-hotlist)
  88   (eudc-hotlist-mode)))
  89
  90 (defun eudc-hotlist-add-server ()
  91   "Add a new server to the list after current one."
  92   (interactive)
  93   (if (not (eq major-mode 'eudc-hotlist-mode))
  94       (error "Not in a EUDC hotlist edit buffer"))
  95   (let ((server (read-from-minibuffer "Server: "))
  96         (protocol (completing-read "Protocol: "
  97                                    (mapcar '(lambda (elt)
  98                                               (cons (symbol-name elt)
  99                                                     elt))
 100                                            eudc-known-protocols)))
 101         (buffer-read-only nil))
 102     (if (not (eobp))
 103         (forward-line 1))
 104     (insert server)
 105     (indent-to 30)
 106     (insert protocol "\n")))
 107
 108 (defun eudc-hotlist-delete-server ()
 109   "Delete the server at point from the list."
 110   (interactive)
 111   (if (not (eq major-mode 'eudc-hotlist-mode))
 112       (error "Not in a EUDC hotlist edit buffer"))
 113   (let ((buffer-read-only nil))
 114     (save-excursion
 115       (beginning-of-line)
 116       (if (and (>= (point) eudc-hotlist-list-beginning)
 117                (looking-at "^\\([-.a-zA-Z:0-9]+\\)[ \t]+\\([a-zA-Z]+\\)"))
 118           (kill-line 1)
 119         (error "No server on this line")))))
 120
 121 (defun eudc-hotlist-quit-edit ()
 122   "Quit the hotlist editing mode and save changes to the hotlist."
 123   (interactive)
 124   (if (not (eq major-mode 'eudc-hotlist-mode))
 125       (error "Not in a EUDC hotlist edit buffer"))
 126   (let (hotlist)
 127     (goto-char eudc-hotlist-list-beginning)
 128     (while (looking-at "^\\([-.a-zA-Z:0-9]+\\)[ \t]+\\([a-zA-Z]+\\)")
 129       (setq hotlist (cons (cons (match-string 1)
 130                                 (intern (match-string 2)))
 131                           hotlist))
 132       (forward-line 1))
 133     (if (not (looking-at "^[ \t]*$"))
 134         (error "Malformed entry in hotlist, discarding edits"))
 135     (setq eudc-server-hotlist (nreverse hotlist))
 136     (eudc-install-menu)
 137     (eudc-save-options)
 138     (kill-this-buffer)))
 139
 140 (defun eudc-hotlist-select-server ()
 141   "Select the server at point as the current server."
 142   (interactive)
 143   (if (not (eq major-mode 'eudc-hotlist-mode))
 144       (error "Not in a EUDC hotlist edit buffer"))
 145   (save-excursion
 146     (beginning-of-line)
 147     (if (and (>= (point) eudc-hotlist-list-beginning)
 148              (looking-at "^\\([-.a-zA-Z:0-9]+\\)[ \t]+\\([a-zA-Z]+\\)"))
 149         (progn
 150           (eudc-set-server (match-string 1) (intern (match-string 2)))
 151           (message "Current directory server is %s (%s)" eudc-server eudc-protocol))
 152       (error "No server on this line"))))
 153
 154 (defun eudc-hotlist-transpose-servers ()
 155   "Swap the order of the server with the previous one in the list."
 156   (interactive)
 157   (if (not (eq major-mode 'eudc-hotlist-mode))
 158       (error "Not in a EUDC hotlist edit buffer"))
 159   (let ((buffer-read-only nil))
 160     (save-excursion
 161       (beginning-of-line)
 162       (if (and (>= (point) eudc-hotlist-list-beginning)
 163                (looking-at "^\\([-.a-zA-Z:0-9]+\\)[ \t]+\\([a-zA-Z]+\\)")
 164                (progn
 165                  (forward-line -1)
 166                  (looking-at "^\\([-.a-zA-Z:0-9]+\\)[ \t]+\\([a-zA-Z]+\\)")))
 167           (progn
 168             (forward-line 1)
 169             (transpose-lines 1))))))
 170
 171 (setq eudc-hotlist-mode-map
 172       (let ((map (make-sparse-keymap)))
 173         (define-key map "a" 'eudc-hotlist-add-server)
 174         (define-key map "d" 'eudc-hotlist-delete-server)
 175         (define-key map "s" 'eudc-hotlist-select-server)
 176         (define-key map "t" 'eudc-hotlist-transpose-servers)
 177         (define-key map "q" 'eudc-hotlist-quit-edit)
 178         (define-key map "x" 'kill-this-buffer)
 179         map))
 180
 181 (defconst eudc-hotlist-menu
 182   '("EUDC Hotlist Edit"
 183     ["---" nil nil]
 184     ["Add New Server" eudc-hotlist-add-server t]
 185     ["Delete Server" eudc-hotlist-delete-server t]
 186     ["Select Server" eudc-hotlist-select-server t]
 187     ["Transpose Servers" eudc-hotlist-transpose-servers t]
 188     ["Save and Quit" eudc-hotlist-quit-edit t]
 189     ["Exit without Saving" kill-this-buffer t]))
 190
 191 (if eudc-emacs-p
 192     (easy-menu-define eudc-hotlist-emacs-menu
 193                       eudc-hotlist-mode-map
 194                       ""
 195                       eudc-hotlist-menu))
 196
 197 ;;; eudc-hotlist.el ends here