lisp/net/eudc-hotlist.el

   1 ;;; eudc-hotlist.el --- hotlist management for EUDC -*- coding: utf-8 -*-
   2
   3 ;; Copyright (C) 1998-2013 Free Software Foundation, Inc.
   4
   5 ;; Author: Oscar Figueiredo <oscar@cpe.fr>
   6 ;; Maintainer: Pavel Janík <Pavel@Janik.cz>
   7 ;; Keywords: comm
   8 ;; Package: eudc
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software: you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation, either version 3 of the License, or
  15 ;; (at your option) any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  24
  25 ;;; Commentary:
  26
  27 ;;; Usage:
  28 ;;    See the corresponding info file
  29
  30 ;;; Code:
  31
  32 (require 'eudc)
  33
  34 (defvar eudc-hotlist-menu nil)
  35 (defvar eudc-hotlist-list-beginning nil)
  36
  37 (defvar eudc-hotlist-mode-map
  38   (let ((map (make-sparse-keymap)))
  39     (define-key map "a" 'eudc-hotlist-add-server)
  40     (define-key map "d" 'eudc-hotlist-delete-server)
  41     (define-key map "s" 'eudc-hotlist-select-server)
  42     (define-key map "t" 'eudc-hotlist-transpose-servers)
  43     (define-key map "q" 'eudc-hotlist-quit-edit)
  44     (define-key map "x" 'kill-this-buffer)
  45     map))
  46
  47 (define-derived-mode eudc-hotlist-mode fundamental-mode "EUDC-Servers"
  48   "Major mode used to edit the hotlist of servers.
  49
  50 These are the special commands of this mode:
  51     a -- Add a new server to the list.
  52     d -- Delete the server at point from the list.
  53     s -- Select the server at point.
  54     t -- Transpose the server at point and the previous one
  55     q -- Commit the changes and quit.
  56     x -- Quit without committing the changes."
  57   (when (featurep 'xemacs)
  58     (setq mode-popup-menu eudc-hotlist-menu)
  59     (when (featurep 'menubar)
  60       (set-buffer-menubar current-menubar)
  61       (add-submenu nil (cons "EUDC-Hotlist" (cdr (cdr eudc-hotlist-menu))))))
  62   (setq buffer-read-only t))
  63
  64 ;;;###autoload
  65 (defun eudc-edit-hotlist ()
  66   "Edit the hotlist of directory servers in a specialized buffer."
  67   (interactive)
  68   (let ((proto-col 10)
  69         gap)
  70     (switch-to-buffer (get-buffer-create "*EUDC Servers*"))
  71     (setq buffer-read-only nil)
  72     (erase-buffer)
  73     (dolist (entry eudc-server-hotlist)
  74       (setq proto-col (max (length (car entry)) proto-col)))
  75     (setq proto-col (+ 3 proto-col))
  76     (setq gap (make-string (- proto-col 6) ?\ ))
  77     (insert "              EUDC Servers\n"
  78             "              ============\n"
  79             "\n"
  80             "Server" gap "Protocol\n"
  81             "------" gap "--------\n"
  82             "\n")
  83     (setq eudc-hotlist-list-beginning (point))
  84     (dolist (entry eudc-server-hotlist)
  85       (insert (car entry))
  86       (indent-to proto-col)
  87       (insert (symbol-name (cdr entry)) "\n"))
  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 (derived-mode-p '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 (derived-mode-p '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 (derived-mode-p '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 (derived-mode-p '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 (derived-mode-p '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 (defconst eudc-hotlist-menu
 172   '("EUDC Hotlist Edit"
 173     ["---" nil nil]
 174     ["Add New Server" eudc-hotlist-add-server t]
 175     ["Delete Server" eudc-hotlist-delete-server t]
 176     ["Select Server" eudc-hotlist-select-server t]
 177     ["Transpose Servers" eudc-hotlist-transpose-servers t]
 178     ["Save and Quit" eudc-hotlist-quit-edit t]
 179     ["Exit without Saving" kill-this-buffer t]))
 180
 181 (when (not (featurep 'xemacs))
 182   (easy-menu-define eudc-hotlist-emacs-menu
 183     eudc-hotlist-mode-map
 184     ""
 185     eudc-hotlist-menu))
 186
 187 ;;; eudc-hotlist.el ends here