lisp/erc/erc-goodies.el

   1 ;; erc-goodies.el --- Collection of ERC modules
   2
   3 ;; Copyright (C) 2001-2014 Free Software Foundation, Inc.
   4
   5 ;; Author: Jorgen Schaefer <forcer@forcix.cx>
   6 ;; Maintainer: FSF
   7
   8 ;; Most code is taken verbatim from erc.el, see there for the original
   9 ;; authors.
  10
  11 ;; This file is part of GNU Emacs.
  12
  13 ;; GNU Emacs is free software: you can redistribute it and/or modify
  14 ;; it under the terms of the GNU General Public License as published by
  15 ;; the Free Software Foundation, either version 3 of the License, or
  16 ;; (at your option) any later version.
  17
  18 ;; GNU Emacs is distributed in the hope that it will be useful,
  19 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 ;; GNU General Public License for more details.
  22
  23 ;; You should have received a copy of the GNU General Public License
  24 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  25
  26 ;;; Commentary:
  27
  28 ;; This provides some small but still useful modes for ERC.
  29
  30 ;;; Code:
  31
  32 (require 'erc)
  33
  34 ;;; Imenu support
  35
  36 (defun erc-imenu-setup ()
  37   "Setup Imenu support in an ERC buffer."
  38   (set (make-local-variable 'imenu-create-index-function)
  39        'erc-create-imenu-index))
  40
  41 (add-hook 'erc-mode-hook 'erc-imenu-setup)
  42 (autoload 'erc-create-imenu-index "erc-imenu" "Imenu index creation function")
  43
  44 ;;; Automatically scroll to bottom
  45 (defcustom erc-input-line-position nil
  46   "Specify where to position the input line when using `erc-scroll-to-bottom'.
  47
  48 This should be an integer specifying the line of the buffer on which
  49 the input line should stay.  A value of \"-1\" would keep the input
  50 line positioned on the last line in the buffer.  This is passed as an
  51 argument to `recenter'."
  52   :group 'erc-display
  53   :type '(choice integer (const nil)))
  54
  55 (define-erc-module scrolltobottom nil
  56   "This mode causes the prompt to stay at the end of the window."
  57   ((add-hook 'erc-mode-hook 'erc-add-scroll-to-bottom)
  58    (dolist (buffer (erc-buffer-list))
  59      (with-current-buffer buffer
  60        (erc-add-scroll-to-bottom))))
  61   ((remove-hook 'erc-mode-hook 'erc-add-scroll-to-bottom)
  62    (dolist (buffer (erc-buffer-list))
  63      (with-current-buffer buffer
  64        (remove-hook 'post-command-hook 'erc-scroll-to-bottom t)))))
  65
  66 (defun erc-add-scroll-to-bottom ()
  67   "A hook function for `erc-mode-hook' to recenter output at bottom of window.
  68
  69 If you find that ERC hangs when using this function, try customizing
  70 the value of `erc-input-line-position'.
  71
  72 This works whenever scrolling happens, so it's added to
  73 `window-scroll-functions' rather than `erc-insert-post-hook'."
  74   (add-hook 'post-command-hook 'erc-scroll-to-bottom nil t))
  75
  76 (defun erc-scroll-to-bottom ()
  77   "Recenter WINDOW so that `point' is on the last line.
  78
  79 This is added to `window-scroll-functions' by `erc-add-scroll-to-bottom'.
  80
  81 You can control which line is recentered to by customizing the
  82 variable `erc-input-line-position'."
  83       ;; Temporarily bind resize-mini-windows to nil so that users who have it
  84       ;; set to a non-nil value will not suffer from premature minibuffer
  85       ;; shrinkage due to the below recenter call.  I have no idea why this
  86       ;; works, but it solves the problem, and has no negative side effects.
  87       ;; (Fran Litterio, 2003/01/07)
  88   (let ((resize-mini-windows nil))
  89     (save-restriction
  90       (widen)
  91       (when (and erc-insert-marker
  92                  ;; we're editing a line. Scroll.
  93                  (> (point) erc-insert-marker))
  94         (save-excursion
  95           (goto-char (point-max))
  96           (recenter (or erc-input-line-position -1)))))))
  97
  98 ;;; Make read only
  99 (define-erc-module readonly nil
 100   "This mode causes all inserted text to be read-only."
 101   ((add-hook 'erc-insert-post-hook 'erc-make-read-only)
 102    (add-hook 'erc-send-post-hook 'erc-make-read-only))
 103   ((remove-hook 'erc-insert-post-hook 'erc-make-read-only)
 104    (remove-hook 'erc-send-post-hook 'erc-make-read-only)))
 105
 106 (defun erc-make-read-only ()
 107   "Make all the text in the current buffer read-only.
 108 Put this function on `erc-insert-post-hook' and/or `erc-send-post-hook'."
 109   (put-text-property (point-min) (point-max) 'read-only t)
 110   (put-text-property (point-min) (point-max) 'front-sticky t)
 111   (put-text-property (point-min) (point-max) 'rear-nonsticky t))
 112
 113 ;;; Move to prompt when typing text
 114 (define-erc-module move-to-prompt nil
 115   "This mode causes the point to be moved to the prompt when typing text."
 116   ((add-hook 'erc-mode-hook 'erc-move-to-prompt-setup)
 117    (dolist (buffer (erc-buffer-list))
 118      (with-current-buffer buffer
 119        (erc-move-to-prompt-setup))))
 120   ((remove-hook 'erc-mode-hook 'erc-move-to-prompt-setup)
 121    (dolist (buffer (erc-buffer-list))
 122      (with-current-buffer buffer
 123        (remove-hook 'pre-command-hook 'erc-move-to-prompt t)))))
 124
 125 (defun erc-move-to-prompt ()
 126   "Move the point to the ERC prompt if this is a self-inserting command."
 127   (when (and erc-input-marker (< (point) erc-input-marker)
 128              (eq 'self-insert-command this-command))
 129     (deactivate-mark)
 130     (push-mark)
 131     (goto-char (point-max))))
 132
 133 (defun erc-move-to-prompt-setup ()
 134   "Initialize the move-to-prompt module for XEmacs."
 135   (add-hook 'pre-command-hook 'erc-move-to-prompt nil t))
 136
 137 ;;; Keep place in unvisited channels
 138 (define-erc-module keep-place nil
 139   "Leave point above un-viewed text in other channels."
 140   ((add-hook 'erc-insert-pre-hook  'erc-keep-place))
 141   ((remove-hook 'erc-insert-pre-hook  'erc-keep-place)))
 142
 143 (defun erc-keep-place (ignored)
 144   "Move point away from the last line in a non-selected ERC buffer."
 145   (when (and (not (eq (window-buffer (selected-window))
 146                       (current-buffer)))
 147              (>= (point) erc-insert-marker))
 148     (deactivate-mark)
 149     (goto-char (erc-beg-of-input-line))
 150     (forward-line -1)))
 151
 152 ;;; Distinguish non-commands
 153 (defvar erc-noncommands-list '(erc-cmd-ME
 154                                erc-cmd-COUNTRY
 155                                erc-cmd-SV
 156                                erc-cmd-SM
 157                                erc-cmd-SMV
 158                                erc-cmd-LASTLOG)
 159   "List of commands that are aliases for CTCP ACTION or for ERC messages.
 160
 161 If a command's function symbol is in this list, the typed command
 162 does not appear in the ERC buffer after the user presses ENTER.")
 163
 164 (define-erc-module noncommands nil
 165   "This mode distinguishes non-commands.
 166 Commands listed in `erc-insert-this' know how to display
 167 themselves."
 168   ((add-hook 'erc-send-pre-hook 'erc-send-distinguish-noncommands))
 169   ((remove-hook 'erc-send-pre-hook 'erc-send-distinguish-noncommands)))
 170
 171 (defun erc-send-distinguish-noncommands (str)
 172   "If STR is an ERC non-command, set `erc-insert-this' to nil."
 173   (let* ((command (erc-extract-command-from-line str))
 174          (cmd-fun (and command
 175                        (car command))))
 176     (when (and cmd-fun
 177                (not (string-match "\n.+$" str))
 178                (memq cmd-fun erc-noncommands-list))
 179       (setq erc-insert-this nil))))
 180
 181 ;;; IRC control character processing.
 182 (defgroup erc-control-characters nil
 183   "Dealing with control characters."
 184   :group 'erc)
 185
 186 (defcustom erc-interpret-controls-p t
 187   "If non-nil, display IRC colors and other highlighting effects.
 188
 189 If this is set to the symbol `remove', ERC removes all IRC colors and
 190 highlighting effects.  When this variable is non-nil, it can cause Emacs to run
 191 slowly on systems lacking sufficient CPU speed.  In chatty channels, or in an
 192 emergency (message flood) it can be turned off to save processing time.  See
 193 `erc-toggle-interpret-controls'."
 194   :group 'erc-control-characters
 195   :type '(choice (const :tag "Highlight control characters" t)
 196                  (const :tag "Remove control characters" remove)
 197                  (const :tag "Display raw control characters" nil)))
 198
 199 (defcustom erc-interpret-mirc-color nil
 200   "If non-nil, ERC will interpret mIRC color codes."
 201   :group 'erc-control-characters
 202   :type 'boolean)
 203
 204 (defcustom erc-beep-p nil
 205   "Beep if C-g is in the server message.
 206 The value `erc-interpret-controls-p' must also be t for this to work."
 207   :group 'erc-control-characters
 208   :type 'boolean)
 209
 210 (defface erc-bold-face '((t :weight bold))
 211   "ERC bold face."
 212   :group 'erc-faces)
 213
 214 (defface erc-inverse-face
 215   '((t :foreground "White" :background "Black"))
 216   "ERC inverse face."
 217   :group 'erc-faces)
 218
 219 (defface erc-underline-face '((t :underline t))
 220   "ERC underline face."
 221   :group 'erc-faces)
 222
 223 (defface fg:erc-color-face0 '((t :foreground "White"))
 224   "ERC face."
 225   :group 'erc-faces)
 226 (defface fg:erc-color-face1 '((t :foreground "black"))
 227   "ERC face."
 228   :group 'erc-faces)
 229 (defface fg:erc-color-face2 '((t :foreground "blue4"))
 230   "ERC face."
 231   :group 'erc-faces)
 232 (defface fg:erc-color-face3 '((t :foreground "green4"))
 233   "ERC face."
 234   :group 'erc-faces)
 235 (defface fg:erc-color-face4 '((t :foreground "red"))
 236   "ERC face."
 237   :group 'erc-faces)
 238 (defface fg:erc-color-face5 '((t :foreground "brown"))
 239   "ERC face."
 240   :group 'erc-faces)
 241 (defface fg:erc-color-face6 '((t :foreground "purple"))
 242   "ERC face."
 243   :group 'erc-faces)
 244 (defface fg:erc-color-face7 '((t :foreground "orange"))
 245   "ERC face."
 246   :group 'erc-faces)
 247 (defface fg:erc-color-face8 '((t :foreground "yellow"))
 248   "ERC face."
 249   :group 'erc-faces)
 250 (defface fg:erc-color-face9 '((t :foreground "green"))
 251   "ERC face."
 252   :group 'erc-faces)
 253 (defface fg:erc-color-face10 '((t :foreground "lightblue1"))
 254   "ERC face."
 255   :group 'erc-faces)
 256 (defface fg:erc-color-face11 '((t :foreground "cyan"))
 257   "ERC face."
 258   :group 'erc-faces)
 259 (defface fg:erc-color-face12 '((t :foreground "blue"))
 260   "ERC face."
 261   :group 'erc-faces)
 262 (defface fg:erc-color-face13 '((t :foreground "deeppink"))
 263   "ERC face."
 264   :group 'erc-faces)
 265 (defface fg:erc-color-face14 '((t :foreground "gray50"))
 266   "ERC face."
 267   :group 'erc-faces)
 268 (defface fg:erc-color-face15 '((t :foreground "gray90"))
 269   "ERC face."
 270   :group 'erc-faces)
 271
 272 (defface bg:erc-color-face0 '((t :background "White"))
 273   "ERC face."
 274   :group 'erc-faces)
 275 (defface bg:erc-color-face1 '((t :background "black"))
 276   "ERC face."
 277   :group 'erc-faces)
 278 (defface bg:erc-color-face2 '((t :background "blue4"))
 279   "ERC face."
 280   :group 'erc-faces)
 281 (defface bg:erc-color-face3 '((t :background "green4"))
 282   "ERC face."
 283   :group 'erc-faces)
 284 (defface bg:erc-color-face4 '((t :background "red"))
 285   "ERC face."
 286   :group 'erc-faces)
 287 (defface bg:erc-color-face5 '((t :background "brown"))
 288   "ERC face."
 289   :group 'erc-faces)
 290 (defface bg:erc-color-face6 '((t :background "purple"))
 291   "ERC face."
 292   :group 'erc-faces)
 293 (defface bg:erc-color-face7 '((t :background "orange"))
 294   "ERC face."
 295   :group 'erc-faces)
 296 (defface bg:erc-color-face8 '((t :background "yellow"))
 297   "ERC face."
 298   :group 'erc-faces)
 299 (defface bg:erc-color-face9 '((t :background "green"))
 300   "ERC face."
 301   :group 'erc-faces)
 302 (defface bg:erc-color-face10 '((t :background "lightblue1"))
 303   "ERC face."
 304   :group 'erc-faces)
 305 (defface bg:erc-color-face11 '((t :background "cyan"))
 306   "ERC face."
 307   :group 'erc-faces)
 308 (defface bg:erc-color-face12 '((t :background "blue"))
 309   "ERC face."
 310   :group 'erc-faces)
 311 (defface bg:erc-color-face13 '((t :background "deeppink"))
 312   "ERC face."
 313   :group 'erc-faces)
 314 (defface bg:erc-color-face14 '((t :background "gray50"))
 315   "ERC face."
 316   :group 'erc-faces)
 317 (defface bg:erc-color-face15 '((t :background "gray90"))
 318   "ERC face."
 319   :group 'erc-faces)
 320
 321 (defun erc-get-bg-color-face (n)
 322   "Fetches the right face for background color N (0-15)."
 323   (if (stringp n) (setq n (string-to-number n)))
 324   (if (not (numberp n))
 325       (prog1 'default
 326         (erc-error "erc-get-bg-color-face: n is NaN: %S" n))
 327     (when (> n 16)
 328       (erc-log (format "   Wrong color: %s" n))
 329       (setq n (mod n 16)))
 330     (cond
 331      ((and (>= n 0) (< n 16))
 332       (intern (concat "bg:erc-color-face" (number-to-string n))))
 333      (t (erc-log (format "   Wrong color: %s" n)) 'default))))
 334
 335 (defun erc-get-fg-color-face (n)
 336   "Fetches the right face for foreground color N (0-15)."
 337   (if (stringp n) (setq n (string-to-number n)))
 338   (if (not (numberp n))
 339       (prog1 'default
 340         (erc-error "erc-get-fg-color-face: n is NaN: %S" n))
 341     (when (> n 16)
 342       (erc-log (format "   Wrong color: %s" n))
 343       (setq n (mod n 16)))
 344     (cond
 345      ((and (>= n 0) (< n 16))
 346       (intern (concat "fg:erc-color-face" (number-to-string n))))
 347      (t (erc-log (format "   Wrong color: %s" n)) 'default))))
 348
 349 (define-erc-module irccontrols nil
 350   "This mode enables the interpretation of IRC control chars."
 351   ((add-hook 'erc-insert-modify-hook 'erc-controls-highlight)
 352    (add-hook 'erc-send-modify-hook 'erc-controls-highlight))
 353   ((remove-hook 'erc-insert-modify-hook 'erc-controls-highlight)
 354    (remove-hook 'erc-send-modify-hook 'erc-controls-highlight)))
 355
 356 (defun erc-controls-interpret (str)
 357    "Return a copy of STR after dealing with IRC control characters.
 358 See `erc-interpret-controls-p' and `erc-interpret-mirc-color' for options."
 359    (when str
 360      (let ((s str))
 361        (cond ((eq erc-interpret-controls-p 'remove)
 362               (erc-controls-strip s))
 363              (erc-interpret-controls-p
 364               (let ((boldp nil)
 365                     (inversep nil)
 366                     (underlinep nil)
 367                     (fg nil)
 368                     (bg nil))
 369                 (while (string-match erc-controls-highlight-regexp s)
 370                   (let ((control (match-string 1 s))
 371                         (fg-color (match-string 2 s))
 372                         (bg-color (match-string 4 s))
 373                         (start (match-beginning 0))
 374                         (end (+ (match-beginning 0)
 375                                 (length (match-string 5 s)))))
 376                     (setq s (erc-replace-match-subexpression-in-string
 377                              "" s control 1 start))
 378                     (cond ((and erc-interpret-mirc-color (or fg-color bg-color))
 379                            (setq fg fg-color)
 380                            (setq bg bg-color))
 381                           ((string= control "\C-b")
 382                            (setq boldp (not boldp)))
 383                           ((string= control "\C-v")
 384                            (setq inversep (not inversep)))
 385                           ((string= control "\C-_")
 386                            (setq underlinep (not underlinep)))
 387                           ((string= control "\C-c")
 388                            (setq fg nil
 389                                  bg nil))
 390                           ((string= control "\C-g")
 391                            (when erc-beep-p
 392                              (ding)))
 393                           ((string= control "\C-o")
 394                            (setq boldp nil
 395                                  inversep nil
 396                                  underlinep nil
 397                                  fg nil
 398                                  bg nil))
 399                           (t nil))
 400                     (erc-controls-propertize
 401                      start end boldp inversep underlinep fg bg s)))
 402                 s))
 403              (t s)))))
 404
 405 (defun erc-controls-strip (str)
 406   "Return a copy of STR with all IRC control characters removed."
 407   (when str
 408     (let ((s str))
 409       (while (string-match erc-controls-remove-regexp s)
 410         (setq s (replace-match "" nil nil s)))
 411       s)))
 412
 413 (defvar erc-controls-remove-regexp
 414   "\C-b\\|\C-_\\|\C-v\\|\C-g\\|\C-o\\|\C-c[0-9]?[0-9]?\\(,[0-9][0-9]?\\)?"
 415   "Regular expression which matches control characters to remove.")
 416
 417 (defvar erc-controls-highlight-regexp
 418   (concat "\\(\C-b\\|\C-v\\|\C-_\\|\C-g\\|\C-o\\|"
 419           "\C-c\\([0-9][0-9]?\\)?\\(,\\([0-9][0-9]?\\)\\)?\\)"
 420           "\\([^\C-b\C-v\C-_\C-c\C-g\C-o\n]*\\)")
 421   "Regular expression which matches control chars and the text to highlight.")
 422
 423 (defun erc-controls-highlight ()
 424   "Highlight IRC control chars in the buffer.
 425 This is useful for `erc-insert-modify-hook' and `erc-send-modify-hook'.
 426 Also see `erc-interpret-controls-p' and `erc-interpret-mirc-color'."
 427   (goto-char (point-min))
 428   (cond ((eq erc-interpret-controls-p 'remove)
 429          (while (re-search-forward erc-controls-remove-regexp nil t)
 430            (replace-match "")))
 431         (erc-interpret-controls-p
 432          (let ((boldp nil)
 433                (inversep nil)
 434                (underlinep nil)
 435                (fg nil)
 436                (bg nil))
 437            (while (re-search-forward erc-controls-highlight-regexp nil t)
 438              (let ((control (match-string 1))
 439                    (fg-color (match-string 2))
 440                    (bg-color (match-string 4))
 441                    (start (match-beginning 0))
 442                    (end (+ (match-beginning 0) (length (match-string 5)))))
 443                (replace-match "" nil nil nil 1)
 444                (cond ((and erc-interpret-mirc-color (or fg-color bg-color))
 445                       (setq fg fg-color)
 446                       (setq bg bg-color))
 447                      ((string= control "\C-b")
 448                       (setq boldp (not boldp)))
 449                      ((string= control "\C-v")
 450                       (setq inversep (not inversep)))
 451                      ((string= control "\C-_")
 452                       (setq underlinep (not underlinep)))
 453                      ((string= control "\C-c")
 454                       (setq fg nil
 455                             bg nil))
 456                      ((string= control "\C-g")
 457                       (when erc-beep-p
 458                         (ding)))
 459                      ((string= control "\C-o")
 460                       (setq boldp nil
 461                             inversep nil
 462                             underlinep nil
 463                             fg nil
 464                             bg nil))
 465                      (t nil))
 466                (erc-controls-propertize start end
 467                                         boldp inversep underlinep fg bg)))))
 468         (t nil)))
 469
 470 (defun erc-controls-propertize (from to boldp inversep underlinep fg bg
 471                                      &optional str)
 472   "Prepend properties from IRC control characters between FROM and TO.
 473 If optional argument STR is provided, apply to STR, otherwise prepend properties
 474 to a region in the current buffer."
 475   (font-lock-prepend-text-property
 476    from
 477    to
 478    'face
 479    (append (if boldp
 480                '(erc-bold-face)
 481              nil)
 482            (if inversep
 483                '(erc-inverse-face)
 484              nil)
 485            (if underlinep
 486                '(erc-underline-face)
 487              nil)
 488            (if fg
 489                (list (erc-get-fg-color-face fg))
 490              nil)
 491            (if bg
 492                (list (erc-get-bg-color-face bg))
 493              nil))
 494    str)
 495   str)
 496
 497 (defun erc-toggle-interpret-controls (&optional arg)
 498   "Toggle interpretation of control sequences in messages.
 499
 500 If ARG is positive, interpretation is turned on.
 501 Else interpretation is turned off."
 502   (interactive "P")
 503   (cond ((and (numberp arg) (> arg 0))
 504          (setq erc-interpret-controls-p t))
 505         (arg (setq erc-interpret-controls-p nil))
 506         (t (setq erc-interpret-controls-p (not erc-interpret-controls-p))))
 507   (message "ERC color interpretation %s"
 508            (if erc-interpret-controls-p "ON" "OFF")))
 509
 510 ;; Smiley
 511 (define-erc-module smiley nil
 512   "This mode translates text-smileys such as :-) into pictures.
 513 This requires the function `smiley-region', which is defined in
 514 smiley.el, which is part of Gnus."
 515   ((add-hook 'erc-insert-modify-hook 'erc-smiley)
 516    (add-hook 'erc-send-modify-hook 'erc-smiley))
 517   ((remove-hook 'erc-insert-modify-hook 'erc-smiley)
 518    (remove-hook 'erc-send-modify-hook 'erc-smiley)))
 519
 520 (defun erc-smiley ()
 521   "Smilify a region.
 522 This function should be used with `erc-insert-modify-hook'."
 523   (when (fboundp 'smiley-region)
 524     (smiley-region (point-min) (point-max))))
 525
 526 ;; Unmorse
 527 (define-erc-module unmorse nil
 528   "This mode causes morse code in the current channel to be unmorsed."
 529   ((add-hook 'erc-insert-modify-hook 'erc-unmorse))
 530   ((remove-hook 'erc-insert-modify-hook 'erc-unmorse)))
 531
 532 (defun erc-unmorse ()
 533   "Unmorse some text.
 534 Add this to `erc-insert-modify-hook' if you happen to be on a
 535 channel that has weird people talking in morse to each other.
 536
 537 See also `unmorse-region'."
 538   (goto-char (point-min))
 539   (when (re-search-forward "[.-]+\\([.-]*/? *\\)+[.-]+/?" nil t)
 540     (save-restriction
 541       (narrow-to-region (match-beginning 0) (match-end 0))
 542       ;; Turn " / " into "  "
 543       (goto-char (point-min))
 544       (while (re-search-forward " / " nil t)
 545         (replace-match "  "))
 546       ;; Turn "/ " into "/"
 547       (goto-char (point-min))
 548       (while (re-search-forward "/ " nil t)
 549         (replace-match "/"))
 550       ;; Unmorse region
 551       (unmorse-region (point-min) (point-max)))))
 552
 553 ;;; erc-occur
 554 (defun erc-occur (string &optional proc)
 555   "Search for STRING in all buffers related to current server.
 556 If called interactively and prefix argument is given, search on all connected
 557 servers.  If called from a program, PROC specifies the server process."
 558   (interactive
 559    (list (read-string "Search for: ")
 560          (if current-prefix-arg
 561              nil erc-server-process)))
 562   (if (fboundp 'multi-occur)
 563       (multi-occur (erc-buffer-list nil proc) string)
 564     (error "`multi-occur' is not defined as a function")))
 565
 566 (provide 'erc-goodies)
 567
 568 ;;; erc-goodies.el ends here