lisp/erc/erc-pcomplete.el

   1 ;;; erc-pcomplete.el --- Provides programmable completion for ERC
   2
   3 ;; Copyright (C) 2002-2004, 2006-2011 Free Software Foundation, Inc.
   4
   5 ;; Author: Sacha Chua <sacha@free.net.ph>
   6 ;; Keywords: comm, convenience
   7 ;; URL: http://www.emacswiki.org/cgi-bin/wiki.pl?ErcCompletion
   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 3 of the License, or
  14 ;; (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ;;; Commentary:
  25
  26 ;; This file replaces erc-complete.el.  It provides nick completion
  27 ;; for ERC based on pcomplete.  If you do not have pcomplete, you may
  28 ;; try to use erc-complete.el.
  29 ;;
  30 ;; To use, (require 'erc-auto) or (require 'erc-pcomplete), then
  31 ;;   (erc-pcomplete-mode 1)
  32 ;;
  33 ;; If you want nickname completions ordered such that the most recent
  34 ;; speakers are listed first, set
  35 ;; `erc-pcomplete-order-nickname-completions' to `t'.
  36 ;;
  37 ;; See CREDITS for other contributors.
  38 ;;
  39 ;;; Code:
  40
  41 (require 'pcomplete)
  42 (require 'erc)
  43 (require 'erc-compat)
  44 (require 'time-date)
  45 (eval-when-compile (require 'cl))
  46
  47 (defgroup erc-pcomplete nil
  48   "Programmable completion for ERC"
  49   :group 'erc)
  50
  51 (defcustom erc-pcomplete-nick-postfix ":"
  52   "*When `pcomplete' is used in the first word after the prompt,
  53 add this string to nicks completed."
  54   :group 'erc-pcomplete
  55   :type 'string)
  56
  57 (defcustom erc-pcomplete-order-nickname-completions t
  58   "If t, channel nickname completions will be ordered such that
  59 the most recent speakers are listed first."
  60   :group 'erc-pcomplete
  61   :type 'boolean)
  62
  63 ;;;###autoload (autoload 'erc-completion-mode "erc-pcomplete" nil t)
  64 (define-erc-module pcomplete Completion
  65   "In ERC Completion mode, the TAB key does completion whenever possible."
  66   ((add-hook 'erc-mode-hook 'pcomplete-erc-setup)
  67    (add-hook 'erc-complete-functions 'erc-pcompletions-at-point)
  68    (erc-buffer-list #'pcomplete-erc-setup))
  69   ((remove-hook 'erc-mode-hook 'pcomplete-erc-setup)
  70    (remove-hook 'erc-complete-functions 'erc-pcompletions-at-point)))
  71
  72 (defun erc-pcompletions-at-point ()
  73   "ERC completion data from pcomplete.
  74 for use on `completion-at-point-function'."
  75   (when (> (point) (erc-beg-of-input-line))
  76     (or (let ((pcomplete-default-completion-function #'ignore))
  77           (pcomplete-completions-at-point))
  78         (let ((c (pcomplete-completions-at-point)))
  79           (if c (nconc c '(:exclusive no)))))))
  80
  81 (defun erc-pcomplete ()
  82   "Complete the nick before point."
  83   (interactive)
  84   (when (> (point) (erc-beg-of-input-line))
  85     (let ((last-command (if (eq last-command 'erc-complete-word)
  86                             'pcomplete
  87                           last-command)))
  88       (call-interactively 'pcomplete))
  89     t))
  90
  91 ;;; Setup function
  92
  93 (defun pcomplete-erc-setup ()
  94   "Setup `erc-mode' to use pcomplete."
  95   (set (make-local-variable 'pcomplete-ignore-case)
  96        t)
  97   (set (make-local-variable 'pcomplete-use-paring)
  98        nil)
  99   (set (make-local-variable 'pcomplete-parse-arguments-function)
 100        'pcomplete-erc-parse-arguments)
 101   (set (make-local-variable 'pcomplete-command-completion-function)
 102        'pcomplete/erc-mode/complete-command)
 103   (set (make-local-variable 'pcomplete-command-name-function)
 104        'pcomplete-erc-command-name)
 105   (set (make-local-variable 'pcomplete-default-completion-function)
 106        (lambda () (pcomplete-here (pcomplete-erc-nicks)))))
 107
 108 ;;; Programmable completion logic
 109
 110 (defun pcomplete/erc-mode/complete-command ()
 111   (pcomplete-here
 112    (append
 113     (pcomplete-erc-commands)
 114     (pcomplete-erc-nicks erc-pcomplete-nick-postfix t))))
 115
 116 (defvar erc-pcomplete-ctcp-commands
 117   '("ACTION" "CLIENTINFO" "ECHO" "FINGER" "PING" "TIME" "USERINFO" "VERSION"))
 118
 119 (defun pcomplete/erc-mode/CTCP ()
 120   (pcomplete-here (pcomplete-erc-nicks))
 121   (pcomplete-here erc-pcomplete-ctcp-commands))
 122
 123 (defun pcomplete/erc-mode/CLEARTOPIC ()
 124   (pcomplete-here (pcomplete-erc-channels)))
 125
 126 (defun pcomplete/erc-mode/DEOP ()
 127   (while (pcomplete-here (pcomplete-erc-ops))))
 128
 129 (defun pcomplete/erc-mode/DESCRIBE ()
 130   (pcomplete-here (pcomplete-erc-nicks)))
 131
 132 (defun pcomplete/erc-mode/IDLE ()
 133   (while (pcomplete-here (pcomplete-erc-nicks))))
 134
 135 (defun pcomplete/erc-mode/KICK ()
 136   (pcomplete-here (pcomplete-erc-channels))
 137   (pcomplete-here (pcomplete-erc-nicks)))
 138
 139 (defun pcomplete/erc-mode/LOAD ()
 140   (pcomplete-here (pcomplete-entries)))
 141
 142 (defun pcomplete/erc-mode/MODE ()
 143   (pcomplete-here (pcomplete-erc-channels))
 144   (while (pcomplete-here (pcomplete-erc-nicks))))
 145
 146 (defun pcomplete/erc-mode/ME ()
 147   (while (pcomplete-here (pcomplete-erc-nicks))))
 148
 149 (defun pcomplete/erc-mode/SAY ()
 150   (pcomplete-here (pcomplete-erc-nicks))
 151   (pcomplete-here (pcomplete-erc-nicks))
 152   (while (pcomplete-here (pcomplete-erc-nicks))))
 153
 154 (defun pcomplete/erc-mode/MSG ()
 155   (pcomplete-here (append (pcomplete-erc-all-nicks)
 156                           (pcomplete-erc-channels)))
 157   (while (pcomplete-here (pcomplete-erc-nicks))))
 158
 159 (defun pcomplete/erc-mode/NAMES ()
 160   (while (pcomplete-here (pcomplete-erc-channels))))
 161
 162 (defalias 'pcomplete/erc-mode/NOTICE 'pcomplete/erc-mode/MSG)
 163
 164 (defun pcomplete/erc-mode/OP ()
 165   (while (pcomplete-here (pcomplete-erc-not-ops))))
 166
 167 (defun pcomplete/erc-mode/PART ()
 168   (pcomplete-here (pcomplete-erc-channels)))
 169
 170 (defalias 'pcomplete/erc-mode/LEAVE 'pcomplete/erc-mode/PART)
 171
 172 (defun pcomplete/erc-mode/QUERY ()
 173   (pcomplete-here (append (pcomplete-erc-all-nicks)
 174                           (pcomplete-erc-channels)))
 175   (while (pcomplete-here (pcomplete-erc-nicks)))
 176   )
 177
 178 (defun pcomplete/erc-mode/SOUND ()
 179   (while (pcomplete-here (pcomplete-entries))))
 180
 181 (defun pcomplete/erc-mode/TOPIC ()
 182   (pcomplete-here (pcomplete-erc-channels)))
 183
 184 (defun pcomplete/erc-mode/WHOIS ()
 185   (while (pcomplete-here (pcomplete-erc-nicks))))
 186
 187 (defun pcomplete/erc-mode/UNIGNORE ()
 188   (pcomplete-here (erc-with-server-buffer erc-ignore-list)))
 189
 190 ;;; Functions that provide possible completions.
 191
 192 (defun pcomplete-erc-commands ()
 193   "Returns a list of strings of the defined user commands."
 194   (let ((case-fold-search nil))
 195     (mapcar (lambda (x)
 196               (concat "/" (downcase (substring (symbol-name x) 8))))
 197             (apropos-internal "erc-cmd-[A-Z]+"))))
 198
 199 (defun pcomplete-erc-ops ()
 200   "Returns a list of nicks with ops."
 201   (let (ops)
 202     (maphash (lambda (nick cdata)
 203                (if (and (cdr cdata)
 204                         (erc-channel-user-op (cdr cdata)))
 205                    (setq ops (cons nick ops))))
 206              erc-channel-users)
 207     ops))
 208
 209 (defun pcomplete-erc-not-ops ()
 210   "Returns a list of nicks without ops."
 211   (let (not-ops)
 212     (maphash (lambda (nick cdata)
 213                (if (and (cdr cdata)
 214                         (not (erc-channel-user-op (cdr cdata))))
 215                    (setq not-ops (cons nick not-ops))))
 216              erc-channel-users)
 217     not-ops))
 218
 219
 220 (defun pcomplete-erc-nicks (&optional postfix ignore-self)
 221   "Returns a list of nicks in the current channel.
 222 Optional argument POSTFIX is something to append to the nickname.
 223 If optional argument IGNORE-SELF is non-nil, don't return the current nick."
 224   (let ((users (if erc-pcomplete-order-nickname-completions
 225                    (erc-sort-channel-users-by-activity
 226                     (erc-get-channel-user-list))
 227                  (erc-get-channel-user-list)))
 228         (nicks nil))
 229     (dolist (user users)
 230       (unless (and ignore-self
 231                    (string= (erc-server-user-nickname (car user))
 232                             (erc-current-nick)))
 233         (setq nicks (cons (concat (erc-server-user-nickname (car user))
 234                                   postfix)
 235                           nicks))))
 236     (nreverse nicks)))
 237
 238 (defun pcomplete-erc-all-nicks (&optional postfix)
 239   "Returns a list of all nicks on the current server."
 240   (let (nicks)
 241     (erc-with-server-buffer
 242       (maphash (lambda (nick user)
 243                  (setq nicks (cons (concat nick postfix) nicks)))
 244                erc-server-users))
 245       nicks))
 246
 247 (defun pcomplete-erc-channels ()
 248   "Returns a list of channels associated with the current server."
 249   (mapcar (lambda (buf) (with-current-buffer buf (erc-default-target)))
 250           (erc-channel-list erc-server-process)))
 251
 252 ;;; Functions for parsing
 253
 254 (defun pcomplete-erc-command-name ()
 255   "Returns the command name of the first argument."
 256   (if (eq (elt (pcomplete-arg 'first) 0) ?/)
 257       (upcase (substring (pcomplete-arg 'first) 1))
 258     "SAY"))
 259
 260 (defun pcomplete-erc-parse-arguments ()
 261   "Returns a list of parsed whitespace-separated arguments.
 262 These are the words from the beginning of the line after the prompt
 263 up to where point is right now."
 264   (let* ((start erc-input-marker)
 265          (end (point))
 266          args beginnings)
 267     (save-excursion
 268       (if (< (skip-chars-backward " \t\n" start) 0)
 269           (setq args '("")
 270                 beginnings (list end)))
 271       (setq end (point))
 272       (while (< (skip-chars-backward "^ \t\n" start) 0)
 273         (setq beginnings (cons (point) beginnings)
 274               args (cons (buffer-substring-no-properties
 275                           (point) end)
 276                          args))
 277         (skip-chars-backward " \t\n" start)
 278         (setq end (point))))
 279     (cons args beginnings)))
 280
 281 (provide 'erc-pcomplete)
 282
 283 ;;; erc-pcomplete.el ends here
 284 ;;
 285 ;; Local Variables:
 286 ;; indent-tabs-mode: nil
 287 ;; End:
 288