| 1 | ;;; erc-track.el --- Track modified channel buffers |
| 2 | |
| 3 | ;; Copyright (C) 2002-2012 Free Software Foundation, Inc. |
| 4 | |
| 5 | ;; Author: Mario Lang <mlang@delysid.org> |
| 6 | ;; Maintainer: FSF |
| 7 | ;; Keywords: comm, faces |
| 8 | ;; URL: http://www.emacswiki.org/cgi-bin/wiki.pl?ErcChannelTracking |
| 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 | ;; Highlights keywords and pals (friends), and hides or highlights fools |
| 28 | ;; (using a dark color). Add to your init file: |
| 29 | |
| 30 | ;; (require 'erc-track) |
| 31 | ;; (erc-track-mode 1) |
| 32 | |
| 33 | ;; Todo: |
| 34 | ;; * Add extensibility so that custom functions can track |
| 35 | ;; custom modification types. |
| 36 | |
| 37 | (eval-when-compile (require 'cl)) |
| 38 | (require 'erc) |
| 39 | (require 'erc-compat) |
| 40 | (require 'erc-match) |
| 41 | |
| 42 | ;;; Code: |
| 43 | |
| 44 | (defgroup erc-track nil |
| 45 | "Track active buffers and show activity in the mode line." |
| 46 | :group 'erc) |
| 47 | |
| 48 | (defcustom erc-track-enable-keybindings 'ask |
| 49 | "Whether to enable the ERC track keybindings, namely: |
| 50 | `C-c C-SPC' and `C-c C-@', which both do the same thing. |
| 51 | |
| 52 | The default is to check to see whether these keys are used |
| 53 | already: if not, then enable the ERC track minor mode, which |
| 54 | provides these keys. Otherwise, do not touch the keys. |
| 55 | |
| 56 | This can alternatively be set to either t or nil, which indicate |
| 57 | respectively always to enable ERC track minor mode or never to |
| 58 | enable ERC track minor mode. |
| 59 | |
| 60 | The reason for using this default value is to both (1) adhere to |
| 61 | the Emacs development guidelines which say not to touch keys of |
| 62 | the form C-c C-<something> and also (2) to meet the expectations |
| 63 | of long-time ERC users, many of whom rely on these keybindings." |
| 64 | :group 'erc-track |
| 65 | :type '(choice (const :tag "Ask, if used already" ask) |
| 66 | (const :tag "Enable" t) |
| 67 | (const :tag "Disable" nil))) |
| 68 | |
| 69 | (defcustom erc-track-visibility t |
| 70 | "Where do we look for buffers to determine their visibility? |
| 71 | The value of this variable determines, when a buffer is considered |
| 72 | visible or invisible. New messages in invisible buffers are tracked, |
| 73 | while switching to visible buffers when they are tracked removes them |
| 74 | from the list. See also `erc-track-when-inactive'. |
| 75 | |
| 76 | Possible values are: |
| 77 | |
| 78 | t - all frames |
| 79 | visible - all visible frames |
| 80 | nil - only the selected frame |
| 81 | selected-visible - only the selected frame if it is visible |
| 82 | |
| 83 | Activity means that there was no user input in the last 10 seconds." |
| 84 | :group 'erc-track |
| 85 | :type '(choice (const :tag "All frames" t) |
| 86 | (const :tag "All visible frames" visible) |
| 87 | (const :tag "Only the selected frame" nil) |
| 88 | (const :tag "Only the selected frame if it is visible" |
| 89 | selected-visible))) |
| 90 | |
| 91 | (defcustom erc-track-exclude nil |
| 92 | "A list targets (channel names or query targets) which should not be tracked." |
| 93 | :group 'erc-track |
| 94 | :type '(repeat string)) |
| 95 | |
| 96 | (defcustom erc-track-remove-disconnected-buffers nil |
| 97 | "If true, remove buffers associated with a server that is |
| 98 | disconnected from `erc-modified-channels-alist'." |
| 99 | :group 'erc-track |
| 100 | :type 'boolean) |
| 101 | |
| 102 | (defcustom erc-track-exclude-types '("NICK" "333" "353") |
| 103 | "List of message types to be ignored. |
| 104 | This list could look like '(\"JOIN\" \"PART\"). |
| 105 | |
| 106 | By default, exclude changes of nicknames (NICK), display of who |
| 107 | set the channel topic (333), and listing of users on the current |
| 108 | channel (353)." |
| 109 | :group 'erc-track |
| 110 | :type 'erc-message-type) |
| 111 | |
| 112 | (defcustom erc-track-exclude-server-buffer nil |
| 113 | "If true, don't perform tracking on the server buffer; this is |
| 114 | useful for excluding all the things like MOTDs from the server and |
| 115 | other miscellaneous functions." |
| 116 | :group 'erc-track |
| 117 | :type 'boolean) |
| 118 | |
| 119 | (defcustom erc-track-shorten-start 1 |
| 120 | "This number specifies the minimum number of characters a channel name in |
| 121 | the mode-line should be reduced to." |
| 122 | :group 'erc-track |
| 123 | :type 'number) |
| 124 | |
| 125 | (defcustom erc-track-shorten-cutoff 4 |
| 126 | "All channel names longer than this value will be shortened." |
| 127 | :group 'erc-track |
| 128 | :type 'number) |
| 129 | |
| 130 | (defcustom erc-track-shorten-aggressively nil |
| 131 | "If non-nil, channel names will be shortened more aggressively. |
| 132 | Usually, names are not shortened if this will save only one character. |
| 133 | Example: If there are two channels, #linux-de and #linux-fr, then |
| 134 | normally these will not be shortened. When shortening aggressively, |
| 135 | however, these will be shortened to #linux-d and #linux-f. |
| 136 | |
| 137 | If this variable is set to `max', then channel names will be shortened |
| 138 | to the max. Usually, shortened channel names will remain unique for a |
| 139 | given set of existing channels. When shortening to the max, the shortened |
| 140 | channel names will be unique for the set of active channels only. |
| 141 | Example: If there are two active channels #emacs and #vi, and two inactive |
| 142 | channels #electronica and #folk, then usually the active channels are |
| 143 | shortened to #em and #v. When shortening to the max, however, #emacs is |
| 144 | not compared to #electronica -- only to #vi, therefore it can be shortened |
| 145 | even more and the result is #e and #v. |
| 146 | |
| 147 | This setting is used by `erc-track-shorten-names'." |
| 148 | :group 'erc-track |
| 149 | :type '(choice (const :tag "No" nil) |
| 150 | (const :tag "Yes" t) |
| 151 | (const :tag "Max" max))) |
| 152 | |
| 153 | (defcustom erc-track-shorten-function 'erc-track-shorten-names |
| 154 | "This function will be used to reduce the channel names before display. |
| 155 | It takes one argument, CHANNEL-NAMES which is a list of strings. |
| 156 | It should return a list of strings of the same number of elements. |
| 157 | If nil instead of a function, shortening is disabled." |
| 158 | :group 'erc-track |
| 159 | :type '(choice (const :tag "Disabled") |
| 160 | function)) |
| 161 | |
| 162 | (defcustom erc-track-list-changed-hook nil |
| 163 | "Hook that is run whenever the contents of |
| 164 | `erc-modified-channels-alist' changes. |
| 165 | |
| 166 | This is useful for people that don't use the default mode-line |
| 167 | notification but instead use a separate mechanism to provide |
| 168 | notification of channel activity." |
| 169 | :group 'erc-track |
| 170 | :type 'hook) |
| 171 | |
| 172 | (defcustom erc-track-use-faces t |
| 173 | "Use faces in the mode-line. |
| 174 | The faces used are the same as used for text in the buffers. |
| 175 | \(e.g. `erc-pal-face' is used if a pal sent a message to that channel.)" |
| 176 | :group 'erc-track |
| 177 | :type 'boolean) |
| 178 | |
| 179 | (defcustom erc-track-faces-priority-list |
| 180 | '(erc-error-face |
| 181 | (erc-nick-default-face erc-current-nick-face) |
| 182 | erc-current-nick-face |
| 183 | erc-keyword-face |
| 184 | (erc-nick-default-face erc-pal-face) |
| 185 | erc-pal-face |
| 186 | erc-nick-msg-face |
| 187 | erc-direct-msg-face |
| 188 | (erc-button erc-default-face) |
| 189 | (erc-nick-default-face erc-dangerous-host-face) |
| 190 | erc-dangerous-host-face |
| 191 | erc-nick-default-face |
| 192 | (erc-nick-default-face erc-default-face) |
| 193 | erc-default-face |
| 194 | erc-action-face |
| 195 | (erc-nick-default-face erc-fool-face) |
| 196 | erc-fool-face |
| 197 | erc-notice-face |
| 198 | erc-input-face |
| 199 | erc-prompt-face) |
| 200 | "A list of faces used to highlight active buffer names in the mode line. |
| 201 | If a message contains one of the faces in this list, the buffer name will |
| 202 | be highlighted using that face. The first matching face is used." |
| 203 | :group 'erc-track |
| 204 | :type '(repeat (choice face |
| 205 | (repeat :tag "Combination" face)))) |
| 206 | |
| 207 | (defcustom erc-track-priority-faces-only nil |
| 208 | "Only track text highlighted with a priority face. |
| 209 | If you would like to ignore changes in certain channels where there |
| 210 | are no faces corresponding to your `erc-track-faces-priority-list', set |
| 211 | this variable. You can set a list of channel name strings, so those |
| 212 | will be ignored while all other channels will be tracked as normal. |
| 213 | Other options are 'all, to apply this to all channels or nil, to disable |
| 214 | this feature. |
| 215 | |
| 216 | Note: If you have a lot of faces listed in `erc-track-faces-priority-list', |
| 217 | setting this variable might not be very useful." |
| 218 | :group 'erc-track |
| 219 | :type '(choice (const nil) |
| 220 | (repeat string) |
| 221 | (const all))) |
| 222 | |
| 223 | (defcustom erc-track-faces-normal-list |
| 224 | '((erc-button erc-default-face) |
| 225 | (erc-nick-default-face erc-dangerous-host-face) |
| 226 | erc-dangerous-host-face |
| 227 | erc-nick-default-face |
| 228 | (erc-nick-default-face erc-default-face) |
| 229 | erc-default-face |
| 230 | erc-action-face) |
| 231 | "A list of faces considered to be part of normal conversations. |
| 232 | This list is used to highlight active buffer names in the mode line. |
| 233 | |
| 234 | If a message contains one of the faces in this list, and the |
| 235 | previous mode line face for this buffer is also in this list, then |
| 236 | the buffer name will be highlighted using the face from the |
| 237 | message. This gives a rough indication that active conversations |
| 238 | are occurring in these channels. |
| 239 | |
| 240 | The effect may be disabled by setting this variable to nil." |
| 241 | :group 'erc-track |
| 242 | :type '(repeat (choice face |
| 243 | (repeat :tag "Combination" face)))) |
| 244 | |
| 245 | (defcustom erc-track-position-in-mode-line 'before-modes |
| 246 | "Where to show modified channel information in the mode-line. |
| 247 | |
| 248 | Setting this variable only has effects in GNU Emacs versions above 21.3. |
| 249 | |
| 250 | Choices are: |
| 251 | 'before-modes - add to the beginning of `mode-line-modes', |
| 252 | 'after-modes - add to the end of `mode-line-modes', |
| 253 | t - add to the end of `global-mode-string', |
| 254 | nil - don't add to mode line." |
| 255 | :group 'erc-track |
| 256 | :type '(choice (const :tag "Just before mode information" before-modes) |
| 257 | (const :tag "Just after mode information" after-modes) |
| 258 | (const :tag "After all other information" t) |
| 259 | (const :tag "Don't display in mode line" nil)) |
| 260 | :set (lambda (sym val) |
| 261 | (set sym val) |
| 262 | (when (and (boundp 'erc-track-mode) |
| 263 | erc-track-mode) |
| 264 | (erc-track-remove-from-mode-line) |
| 265 | (erc-track-add-to-mode-line val)))) |
| 266 | |
| 267 | (defun erc-modified-channels-object (strings) |
| 268 | "Generate a new `erc-modified-channels-object' based on STRINGS. |
| 269 | If STRINGS is nil, we initialize `erc-modified-channels-object' to |
| 270 | an appropriate initial value for this flavor of Emacs." |
| 271 | (if strings |
| 272 | (if (featurep 'xemacs) |
| 273 | (let ((e-m-c-s '("["))) |
| 274 | (push (cons (extent-at 0 (car strings)) (car strings)) |
| 275 | e-m-c-s) |
| 276 | (dolist (string (cdr strings)) |
| 277 | (push "," e-m-c-s) |
| 278 | (push (cons (extent-at 0 string) string) |
| 279 | e-m-c-s)) |
| 280 | (push "] " e-m-c-s) |
| 281 | (reverse e-m-c-s)) |
| 282 | (concat (if (eq erc-track-position-in-mode-line 'after-modes) |
| 283 | "[" " [") |
| 284 | (mapconcat 'identity (nreverse strings) ",") |
| 285 | (if (eq erc-track-position-in-mode-line 'before-modes) |
| 286 | "] " "]"))) |
| 287 | (if (featurep 'xemacs) '() ""))) |
| 288 | |
| 289 | (defvar erc-modified-channels-object (erc-modified-channels-object nil) |
| 290 | "Internal object used for displaying modified channels in the mode line.") |
| 291 | |
| 292 | (put 'erc-modified-channels-object 'risky-local-variable t); allow properties |
| 293 | |
| 294 | (defvar erc-modified-channels-alist nil |
| 295 | "An ALIST used for tracking channel modification activity. |
| 296 | Each element looks like (BUFFER COUNT FACE) where BUFFER is a buffer |
| 297 | object of the channel the entry corresponds to, COUNT is a number |
| 298 | indicating how often activity was noticed, and FACE is the face to use |
| 299 | when displaying the buffer's name. See `erc-track-faces-priority-list', |
| 300 | and `erc-track-showcount'. |
| 301 | |
| 302 | Entries in this list should only happen for buffers where activity occurred |
| 303 | while the buffer was not visible.") |
| 304 | |
| 305 | (defcustom erc-track-showcount nil |
| 306 | "If non-nil, count of unseen messages will be shown for each channel." |
| 307 | :type 'boolean |
| 308 | :group 'erc-track) |
| 309 | |
| 310 | (defcustom erc-track-showcount-string ":" |
| 311 | "The string to display between buffer name and the count in the mode line. |
| 312 | The default is a colon, resulting in \"#emacs:9\"." |
| 313 | :type 'string |
| 314 | :group 'erc-track) |
| 315 | |
| 316 | (defcustom erc-track-switch-from-erc t |
| 317 | "If non-nil, `erc-track-switch-buffer' will return to the last non-erc buffer |
| 318 | when there are no more active channels." |
| 319 | :type 'boolean |
| 320 | :group 'erc-track) |
| 321 | |
| 322 | (defcustom erc-track-switch-direction 'oldest |
| 323 | "Direction `erc-track-switch-buffer' should switch. |
| 324 | |
| 325 | importance - find buffer with the most important message |
| 326 | oldest - find oldest active buffer |
| 327 | newest - find newest active buffer |
| 328 | leastactive - find buffer with least unseen messages |
| 329 | mostactive - find buffer with most unseen messages. |
| 330 | |
| 331 | If set to 'importance, the importance is determined by position |
| 332 | in `erc-track-faces-priority-list', where first is most |
| 333 | important." |
| 334 | :group 'erc-track |
| 335 | :type '(choice (const importance) |
| 336 | (const oldest) |
| 337 | (const newest) |
| 338 | (const leastactive) |
| 339 | (const mostactive))) |
| 340 | |
| 341 | |
| 342 | (defun erc-track-remove-from-mode-line () |
| 343 | "Remove `erc-track-modified-channels' from the mode-line" |
| 344 | (when (boundp 'mode-line-modes) |
| 345 | (setq mode-line-modes |
| 346 | (remove '(t erc-modified-channels-object) mode-line-modes))) |
| 347 | (when (consp global-mode-string) |
| 348 | (setq global-mode-string |
| 349 | (delq 'erc-modified-channels-object global-mode-string)))) |
| 350 | |
| 351 | (defun erc-track-add-to-mode-line (position) |
| 352 | "Add `erc-track-modified-channels' to POSITION in the mode-line. |
| 353 | See `erc-track-position-in-mode-line' for possible values." |
| 354 | ;; CVS Emacs has a new format string, and global-mode-string |
| 355 | ;; is very far to the right. |
| 356 | (cond ((and (eq position 'before-modes) |
| 357 | (boundp 'mode-line-modes)) |
| 358 | (add-to-list 'mode-line-modes |
| 359 | '(t erc-modified-channels-object))) |
| 360 | ((and (eq position 'after-modes) |
| 361 | (boundp 'mode-line-modes)) |
| 362 | (add-to-list 'mode-line-modes |
| 363 | '(t erc-modified-channels-object) t)) |
| 364 | ((eq position t) |
| 365 | (when (not global-mode-string) |
| 366 | (setq global-mode-string '(""))) ; Padding for mode-line wart |
| 367 | (add-to-list 'global-mode-string |
| 368 | 'erc-modified-channels-object |
| 369 | t)))) |
| 370 | |
| 371 | ;;; Shortening of names |
| 372 | |
| 373 | (defun erc-track-shorten-names (channel-names) |
| 374 | "Call `erc-unique-channel-names' with the correct parameters. |
| 375 | This function is a good value for `erc-track-shorten-function'. |
| 376 | The list of all channels is returned by `erc-all-buffer-names'. |
| 377 | CHANNEL-NAMES is the list of active channel names. |
| 378 | Only channel names longer than `erc-track-shorten-cutoff' are |
| 379 | actually shortened, and they are only shortened to a minimum |
| 380 | of `erc-track-shorten-start' characters." |
| 381 | (erc-unique-channel-names |
| 382 | (erc-all-buffer-names) |
| 383 | channel-names |
| 384 | (lambda (s) |
| 385 | (> (length s) erc-track-shorten-cutoff)) |
| 386 | erc-track-shorten-start)) |
| 387 | |
| 388 | (defvar erc-default-recipients) |
| 389 | |
| 390 | (defun erc-all-buffer-names () |
| 391 | "Return all channel or query buffer names. |
| 392 | Note that we cannot use `erc-channel-list' with a nil argument, |
| 393 | because that does not return query buffers." |
| 394 | (save-excursion |
| 395 | (let (result) |
| 396 | (dolist (buf (buffer-list)) |
| 397 | (set-buffer buf) |
| 398 | (when (or (eq major-mode 'erc-mode) (eq major-mode 'erc-dcc-chat-mode)) |
| 399 | (setq result (cons (buffer-name) result)))) |
| 400 | result))) |
| 401 | |
| 402 | (defun erc-unique-channel-names (all active &optional predicate start) |
| 403 | "Return a list of unique channel names. |
| 404 | ALL is the list of all channel and query buffer names. |
| 405 | ACTIVE is the list of active buffer names. |
| 406 | PREDICATE is a predicate that should return non-nil if a name needs |
| 407 | no shortening. |
| 408 | START is the minimum length of the name used." |
| 409 | (if (eq 'max erc-track-shorten-aggressively) |
| 410 | ;; Return the unique substrings of all active channels. |
| 411 | (erc-unique-substrings active predicate start) |
| 412 | ;; Otherwise, determine the unique substrings of all channels, and |
| 413 | ;; for every active channel, return the corresponding substring. |
| 414 | ;; Given the names of the active channels, we now need to find the |
| 415 | ;; corresponding short name from the list of all substrings. To |
| 416 | ;; avoid problems when there are two channels and one is a |
| 417 | ;; substring of the other (notorious examples are #hurd and |
| 418 | ;; #hurd-bunny), every candidate gets the longest possible |
| 419 | ;; substring. |
| 420 | (let ((all-substrings (sort |
| 421 | (erc-unique-substrings all predicate start) |
| 422 | (lambda (a b) (> (length a) (length b))))) |
| 423 | result) |
| 424 | (dolist (channel active) |
| 425 | (let ((substrings all-substrings) |
| 426 | candidate |
| 427 | winner) |
| 428 | (while (and substrings (not winner)) |
| 429 | (setq candidate (car substrings) |
| 430 | substrings (cdr substrings)) |
| 431 | (when (and (string= candidate |
| 432 | (substring channel |
| 433 | 0 |
| 434 | (min (length candidate) |
| 435 | (length channel)))) |
| 436 | (not (member candidate result))) |
| 437 | (setq winner candidate))) |
| 438 | (setq result (cons winner result)))) |
| 439 | (nreverse result)))) |
| 440 | |
| 441 | (defun erc-unique-substrings (strings &optional predicate start) |
| 442 | "Return a list of unique substrings of STRINGS." |
| 443 | (if (or (not (numberp start)) |
| 444 | (< start 0)) |
| 445 | (setq start 2)) |
| 446 | (mapcar |
| 447 | (lambda (str) |
| 448 | (let* ((others (delete str (copy-sequence strings))) |
| 449 | (maxlen (length str)) |
| 450 | (i (min start |
| 451 | (length str))) |
| 452 | candidate |
| 453 | done) |
| 454 | (if (and (functionp predicate) (not (funcall predicate str))) |
| 455 | ;; do not shorten if a predicate exists and it returns nil |
| 456 | str |
| 457 | ;; Start with smallest substring candidate, ie. length 1. |
| 458 | ;; Then check all the others and see whether any of them starts |
| 459 | ;; with the same substring. While there is such another |
| 460 | ;; element in the list, increase the length of the candidate. |
| 461 | (while (not done) |
| 462 | (if (> i maxlen) |
| 463 | (setq done t) |
| 464 | (setq candidate (substring str 0 i) |
| 465 | done (not (erc-unique-substring-1 candidate others)))) |
| 466 | (setq i (1+ i))) |
| 467 | (if (and (= (length candidate) (1- maxlen)) |
| 468 | (not erc-track-shorten-aggressively)) |
| 469 | str |
| 470 | candidate)))) |
| 471 | strings)) |
| 472 | |
| 473 | (defun erc-unique-substring-1 (candidate others) |
| 474 | "Return non-nil when any string in OTHERS starts with CANDIDATE." |
| 475 | (let (result other (maxlen (length candidate))) |
| 476 | (while (and others |
| 477 | (not result)) |
| 478 | (setq other (car others) |
| 479 | others (cdr others)) |
| 480 | (when (and (>= (length other) maxlen) |
| 481 | (string= candidate (substring other 0 maxlen))) |
| 482 | (setq result other))) |
| 483 | result)) |
| 484 | |
| 485 | ;;; Test: |
| 486 | |
| 487 | (assert |
| 488 | (and |
| 489 | ;; verify examples from the doc strings |
| 490 | (equal (let ((erc-track-shorten-aggressively nil)) |
| 491 | (erc-unique-channel-names |
| 492 | '("#emacs" "#vi" "#electronica" "#folk") |
| 493 | '("#emacs" "#vi"))) |
| 494 | '("#em" "#vi")) ; emacs is different from electronica |
| 495 | (equal (let ((erc-track-shorten-aggressively t)) |
| 496 | (erc-unique-channel-names |
| 497 | '("#emacs" "#vi" "#electronica" "#folk") |
| 498 | '("#emacs" "#vi"))) |
| 499 | '("#em" "#v")) ; vi is shortened by one letter |
| 500 | (equal (let ((erc-track-shorten-aggressively 'max)) |
| 501 | (erc-unique-channel-names |
| 502 | '("#emacs" "#vi" "#electronica" "#folk") |
| 503 | '("#emacs" "#vi"))) |
| 504 | '("#e" "#v")) ; emacs need not be different from electronica |
| 505 | (equal (let ((erc-track-shorten-aggressively nil)) |
| 506 | (erc-unique-channel-names |
| 507 | '("#linux-de" "#linux-fr") |
| 508 | '("#linux-de" "#linux-fr"))) |
| 509 | '("#linux-de" "#linux-fr")) ; shortening by one letter is too aggressive |
| 510 | (equal (let ((erc-track-shorten-aggressively t)) |
| 511 | (erc-unique-channel-names |
| 512 | '("#linux-de" "#linux-fr") |
| 513 | '("#linux-de" "#linux-fr"))) |
| 514 | '("#linux-d" "#linux-f")); now we want to be aggressive |
| 515 | ;; specific problems |
| 516 | (equal (let ((erc-track-shorten-aggressively nil)) |
| 517 | (erc-unique-channel-names |
| 518 | '("#dunnet" "#lisp" "#sawfish" "#fsf" "#guile" |
| 519 | "#testgnome" "#gnu" "#fsbot" "#hurd" "#hurd-bunny" |
| 520 | "#emacs") |
| 521 | '("#hurd-bunny" "#hurd" "#sawfish" "#lisp"))) |
| 522 | '("#hurd-" "#hurd" "#s" "#l")) |
| 523 | (equal (let ((erc-track-shorten-aggressively nil)) |
| 524 | (erc-unique-substrings |
| 525 | '("#emacs" "#vi" "#electronica" "#folk"))) |
| 526 | '("#em" "#vi" "#el" "#f")) |
| 527 | (equal (let ((erc-track-shorten-aggressively t)) |
| 528 | (erc-unique-substrings |
| 529 | '("#emacs" "#vi" "#electronica" "#folk"))) |
| 530 | '("#em" "#v" "#el" "#f")) |
| 531 | (equal (let ((erc-track-shorten-aggressively nil)) |
| 532 | (erc-unique-channel-names |
| 533 | '("#emacs" "#burse" "+linux.de" "#starwars" |
| 534 | "#bitlbee" "+burse" "#ratpoison") |
| 535 | '("+linux.de" "#starwars" "#burse"))) |
| 536 | '("+l" "#s" "#bu")) |
| 537 | (equal (let ((erc-track-shorten-aggressively nil)) |
| 538 | (erc-unique-channel-names |
| 539 | '("fsbot" "#emacs" "deego") |
| 540 | '("fsbot"))) |
| 541 | '("fs")) |
| 542 | (equal (let ((erc-track-shorten-aggressively nil)) |
| 543 | (erc-unique-channel-names |
| 544 | '("fsbot" "#emacs" "deego") |
| 545 | '("fsbot") |
| 546 | (lambda (s) |
| 547 | (> (length s) 4)) |
| 548 | 1)) |
| 549 | '("f")) |
| 550 | (equal (let ((erc-track-shorten-aggressively nil)) |
| 551 | (erc-unique-channel-names |
| 552 | '("fsbot" "#emacs" "deego") |
| 553 | '("fsbot") |
| 554 | (lambda (s) |
| 555 | (> (length s) 4)) |
| 556 | 2)) |
| 557 | '("fs")) |
| 558 | (let ((erc-track-shorten-aggressively nil)) |
| 559 | (equal (erc-unique-channel-names '("deego" "#hurd" "#hurd-bunny" "#emacs") |
| 560 | '("#hurd" "#hurd-bunny")) |
| 561 | '("#hurd" "#hurd-"))) |
| 562 | ;; general examples |
| 563 | (let ((erc-track-shorten-aggressively t)) |
| 564 | (and (equal (erc-unique-substring-1 "abc" '("ab" "abcd")) "abcd") |
| 565 | (not (erc-unique-substring-1 "a" '("xyz" "xab"))) |
| 566 | (equal (erc-unique-substrings '("abc" "xyz" "xab")) |
| 567 | '("ab" "xy" "xa")) |
| 568 | (equal (erc-unique-substrings '("abc" "abcdefg")) |
| 569 | '("abc" "abcd")))) |
| 570 | (let ((erc-track-shorten-aggressively nil)) |
| 571 | (and (equal (erc-unique-substring-1 "abc" '("ab" "abcd")) "abcd") |
| 572 | (not (erc-unique-substring-1 "a" '("xyz" "xab"))) |
| 573 | (equal (erc-unique-substrings '("abc" "xyz" "xab")) |
| 574 | '("abc" "xyz" "xab")) |
| 575 | (equal (erc-unique-substrings '("abc" "abcdefg")) |
| 576 | '("abc" "abcd")))))) |
| 577 | |
| 578 | ;;; Minor mode |
| 579 | |
| 580 | ;; Play nice with other IRC clients (and Emacs development rules) by |
| 581 | ;; making this a minor mode |
| 582 | |
| 583 | (defvar erc-track-minor-mode-map (make-sparse-keymap) |
| 584 | "Keymap for rcirc track minor mode.") |
| 585 | |
| 586 | (define-key erc-track-minor-mode-map (kbd "C-c C-@") 'erc-track-switch-buffer) |
| 587 | (define-key erc-track-minor-mode-map (kbd "C-c C-SPC") |
| 588 | 'erc-track-switch-buffer) |
| 589 | |
| 590 | ;;;###autoload |
| 591 | (define-minor-mode erc-track-minor-mode |
| 592 | "Toggle mode line display of ERC activity (ERC Track minor mode). |
| 593 | With a prefix argument ARG, enable ERC Track minor mode if ARG is |
| 594 | positive, and disable it otherwise. If called from Lisp, enable |
| 595 | the mode if ARG is omitted or nil. |
| 596 | |
| 597 | ERC Track minor mode is a global minor mode. It exists for the |
| 598 | sole purpose of providing the C-c C-SPC and C-c C-@ keybindings. |
| 599 | Make sure that you have enabled the track module, otherwise the |
| 600 | keybindings will not do anything useful." |
| 601 | :init-value nil |
| 602 | :lighter "" |
| 603 | :keymap erc-track-minor-mode-map |
| 604 | :global t |
| 605 | :group 'erc-track) |
| 606 | |
| 607 | (defun erc-track-minor-mode-maybe (&optional buffer) |
| 608 | "Enable `erc-track-minor-mode', depending on `erc-track-enable-keybindings'." |
| 609 | (when (and (not erc-track-minor-mode) |
| 610 | ;; don't start the minor mode until we have an ERC |
| 611 | ;; process running, because we don't want to prompt the |
| 612 | ;; user while starting Emacs |
| 613 | (or (and (buffer-live-p buffer) |
| 614 | (with-current-buffer buffer (eq major-mode 'erc-mode))) |
| 615 | (erc-buffer-list))) |
| 616 | (cond ((eq erc-track-enable-keybindings 'ask) |
| 617 | (let ((key (or (and (key-binding (kbd "C-c C-SPC")) "C-SPC") |
| 618 | (and (key-binding (kbd "C-c C-@")) "C-@")))) |
| 619 | (if key |
| 620 | (if (y-or-n-p |
| 621 | (concat "The C-c " key " binding is in use;" |
| 622 | " override it for tracking? ")) |
| 623 | (progn |
| 624 | (message (concat "Will change it; set" |
| 625 | " `erc-track-enable-keybindings'" |
| 626 | " to disable this message")) |
| 627 | (sleep-for 3) |
| 628 | (erc-track-minor-mode 1)) |
| 629 | (message (concat "Not changing it; set" |
| 630 | " `erc-track-enable-keybindings'" |
| 631 | " to disable this message")) |
| 632 | (sleep-for 3)) |
| 633 | (erc-track-minor-mode 1)))) |
| 634 | ((eq erc-track-enable-keybindings t) |
| 635 | (erc-track-minor-mode 1)) |
| 636 | (t nil)))) |
| 637 | |
| 638 | ;;; Module |
| 639 | |
| 640 | ;;;###autoload (autoload 'erc-track-mode "erc-track" nil t) |
| 641 | (define-erc-module track nil |
| 642 | "This mode tracks ERC channel buffers with activity." |
| 643 | ;; Enable: |
| 644 | ((when (boundp 'erc-track-when-inactive) |
| 645 | (if erc-track-when-inactive |
| 646 | (progn |
| 647 | (if (featurep 'xemacs) |
| 648 | (defadvice switch-to-buffer (after erc-update-when-inactive |
| 649 | (&rest args) activate) |
| 650 | (erc-user-is-active)) |
| 651 | (add-hook 'window-configuration-change-hook 'erc-user-is-active)) |
| 652 | (add-hook 'erc-send-completed-hook 'erc-user-is-active) |
| 653 | (add-hook 'erc-server-001-functions 'erc-user-is-active)) |
| 654 | (erc-track-add-to-mode-line erc-track-position-in-mode-line) |
| 655 | (erc-update-mode-line) |
| 656 | (if (featurep 'xemacs) |
| 657 | (defadvice switch-to-buffer (after erc-update (&rest args) activate) |
| 658 | (erc-modified-channels-update)) |
| 659 | (add-hook 'window-configuration-change-hook |
| 660 | 'erc-window-configuration-change)) |
| 661 | (add-hook 'erc-insert-post-hook 'erc-track-modified-channels) |
| 662 | (add-hook 'erc-disconnected-hook 'erc-modified-channels-update)) |
| 663 | ;; enable the tracking keybindings |
| 664 | (add-hook 'erc-connect-pre-hook 'erc-track-minor-mode-maybe) |
| 665 | (erc-track-minor-mode-maybe))) |
| 666 | ;; Disable: |
| 667 | ((when (boundp 'erc-track-when-inactive) |
| 668 | (erc-track-remove-from-mode-line) |
| 669 | (if erc-track-when-inactive |
| 670 | (progn |
| 671 | (if (featurep 'xemacs) |
| 672 | (ad-disable-advice 'switch-to-buffer 'after |
| 673 | 'erc-update-when-inactive) |
| 674 | (remove-hook 'window-configuration-change-hook |
| 675 | 'erc-user-is-active)) |
| 676 | (remove-hook 'erc-send-completed-hook 'erc-user-is-active) |
| 677 | (remove-hook 'erc-server-001-functions 'erc-user-is-active) |
| 678 | (remove-hook 'erc-timer-hook 'erc-user-is-active)) |
| 679 | (if (featurep 'xemacs) |
| 680 | (ad-disable-advice 'switch-to-buffer 'after 'erc-update) |
| 681 | (remove-hook 'window-configuration-change-hook |
| 682 | 'erc-window-configuration-change)) |
| 683 | (remove-hook 'erc-disconnected-hook 'erc-modified-channels-update) |
| 684 | (remove-hook 'erc-insert-post-hook 'erc-track-modified-channels)) |
| 685 | ;; disable the tracking keybindings |
| 686 | (remove-hook 'erc-connect-pre-hook 'erc-track-minor-mode-maybe) |
| 687 | (when erc-track-minor-mode |
| 688 | (erc-track-minor-mode -1))))) |
| 689 | |
| 690 | (defcustom erc-track-when-inactive nil |
| 691 | "Enable channel tracking even for visible buffers, if you are |
| 692 | inactive." |
| 693 | :group 'erc-track |
| 694 | :type 'boolean |
| 695 | :set (lambda (sym val) |
| 696 | (if erc-track-mode |
| 697 | (progn |
| 698 | (erc-track-disable) |
| 699 | (set sym val) |
| 700 | (erc-track-enable)) |
| 701 | (set sym val)))) |
| 702 | |
| 703 | ;;; Visibility |
| 704 | |
| 705 | (defvar erc-buffer-activity nil |
| 706 | "Last time the user sent something.") |
| 707 | |
| 708 | (defvar erc-buffer-activity-timeout 10 |
| 709 | "How many seconds of inactivity by the user |
| 710 | to consider when `erc-track-visibility' is set to |
| 711 | only consider active buffers visible.") |
| 712 | |
| 713 | (defun erc-user-is-active (&rest ignore) |
| 714 | "Set `erc-buffer-activity'." |
| 715 | (when erc-server-connected |
| 716 | (setq erc-buffer-activity (erc-current-time)) |
| 717 | (erc-track-modified-channels))) |
| 718 | |
| 719 | (defun erc-track-get-buffer-window (buffer frame-param) |
| 720 | (if (eq frame-param 'selected-visible) |
| 721 | (if (eq (frame-visible-p (selected-frame)) t) |
| 722 | (get-buffer-window buffer nil) |
| 723 | nil) |
| 724 | (get-buffer-window buffer frame-param))) |
| 725 | |
| 726 | (defun erc-buffer-visible (buffer) |
| 727 | "Return non-nil when the buffer is visible." |
| 728 | (if erc-track-when-inactive |
| 729 | (when erc-buffer-activity; could be nil |
| 730 | (and (erc-track-get-buffer-window buffer erc-track-visibility) |
| 731 | (<= (erc-time-diff erc-buffer-activity (erc-current-time)) |
| 732 | erc-buffer-activity-timeout))) |
| 733 | (erc-track-get-buffer-window buffer erc-track-visibility))) |
| 734 | |
| 735 | ;;; Tracking the channel modifications |
| 736 | |
| 737 | (defun erc-window-configuration-change () |
| 738 | (unless (minibuffer-window-active-p (minibuffer-window)) |
| 739 | ;; delay this until command has finished to make sure window is |
| 740 | ;; actually visible before clearing activity |
| 741 | (add-hook 'post-command-hook 'erc-modified-channels-update))) |
| 742 | |
| 743 | (defvar erc-modified-channels-update-inside nil |
| 744 | "Variable to prevent running `erc-modified-channels-update' multiple |
| 745 | times. Without it, you cannot debug `erc-modified-channels-display', |
| 746 | because the debugger also cases changes to the window-configuration.") |
| 747 | |
| 748 | (defun erc-modified-channels-update (&rest args) |
| 749 | "This function updates the information in `erc-modified-channels-alist' |
| 750 | according to buffer visibility. It calls |
| 751 | `erc-modified-channels-display' at the end. This should usually be |
| 752 | called via `window-configuration-change-hook'. |
| 753 | ARGS are ignored." |
| 754 | (interactive) |
| 755 | (unless erc-modified-channels-update-inside |
| 756 | (let ((erc-modified-channels-update-inside t) |
| 757 | (removed-channel nil)) |
| 758 | (mapc (lambda (elt) |
| 759 | (let ((buffer (car elt))) |
| 760 | (when (or (not (bufferp buffer)) |
| 761 | (not (buffer-live-p buffer)) |
| 762 | (erc-buffer-visible buffer) |
| 763 | (and erc-track-remove-disconnected-buffers |
| 764 | (not (with-current-buffer buffer |
| 765 | erc-server-connected)))) |
| 766 | (setq removed-channel t) |
| 767 | (erc-modified-channels-remove-buffer buffer)))) |
| 768 | erc-modified-channels-alist) |
| 769 | (when removed-channel |
| 770 | (erc-modified-channels-display) |
| 771 | (force-mode-line-update t))) |
| 772 | (remove-hook 'post-command-hook 'erc-modified-channels-update))) |
| 773 | |
| 774 | (defvar erc-track-mouse-face (if (featurep 'xemacs) |
| 775 | 'modeline-mousable |
| 776 | 'mode-line-highlight) |
| 777 | "The face to use when mouse is over channel names in the mode line.") |
| 778 | |
| 779 | (defun erc-make-mode-line-buffer-name (string buffer &optional faces count) |
| 780 | "Return STRING as a button that switches to BUFFER when clicked. |
| 781 | If FACES are provided, color STRING with them." |
| 782 | ;; We define a new sparse keymap every time, because 1. this data |
| 783 | ;; structure is very small, the alternative would require us to |
| 784 | ;; defvar a keymap, 2. the user is not interested in customizing it |
| 785 | ;; (really?), 3. the defun needs to switch to BUFFER, so we would |
| 786 | ;; need to save that value somewhere. |
| 787 | (let ((map (make-sparse-keymap)) |
| 788 | (name (if erc-track-showcount |
| 789 | (concat string |
| 790 | erc-track-showcount-string |
| 791 | (int-to-string count)) |
| 792 | (copy-sequence string)))) |
| 793 | (define-key map (vector 'mode-line 'mouse-2) |
| 794 | `(lambda (e) |
| 795 | (interactive "e") |
| 796 | (save-selected-window |
| 797 | (select-window |
| 798 | (posn-window (event-start e))) |
| 799 | (switch-to-buffer ,buffer)))) |
| 800 | (define-key map (vector 'mode-line 'mouse-3) |
| 801 | `(lambda (e) |
| 802 | (interactive "e") |
| 803 | (save-selected-window |
| 804 | (select-window |
| 805 | (posn-window (event-start e))) |
| 806 | (switch-to-buffer-other-window ,buffer)))) |
| 807 | (put-text-property 0 (length name) 'local-map map name) |
| 808 | (put-text-property |
| 809 | 0 (length name) |
| 810 | 'help-echo (concat "mouse-2: switch to buffer, " |
| 811 | "mouse-3: switch to buffer in other window") |
| 812 | name) |
| 813 | (put-text-property 0 (length name) 'mouse-face erc-track-mouse-face name) |
| 814 | (when (and faces erc-track-use-faces) |
| 815 | (put-text-property 0 (length name) 'face faces name)) |
| 816 | name)) |
| 817 | |
| 818 | (defun erc-modified-channels-display () |
| 819 | "Set `erc-modified-channels-object' |
| 820 | according to `erc-modified-channels-alist'. |
| 821 | Use `erc-make-mode-line-buffer-name' to create buttons." |
| 822 | (cond ((or (eq 'mostactive erc-track-switch-direction) |
| 823 | (eq 'leastactive erc-track-switch-direction)) |
| 824 | (erc-track-sort-by-activest)) |
| 825 | ((eq 'importance erc-track-switch-direction) |
| 826 | (erc-track-sort-by-importance))) |
| 827 | (run-hooks 'erc-track-list-changed-hook) |
| 828 | (unless (eq erc-track-position-in-mode-line nil) |
| 829 | (if (null erc-modified-channels-alist) |
| 830 | (setq erc-modified-channels-object (erc-modified-channels-object nil)) |
| 831 | ;; erc-modified-channels-alist contains all the data we need. To |
| 832 | ;; better understand what is going on, we split things up into |
| 833 | ;; four lists: BUFFERS, COUNTS, SHORT-NAMES, and FACES. These |
| 834 | ;; four lists we use to create a new |
| 835 | ;; `erc-modified-channels-object' using |
| 836 | ;; `erc-make-mode-line-buffer-name'. |
| 837 | (let* ((buffers (mapcar 'car erc-modified-channels-alist)) |
| 838 | (counts (mapcar 'cadr erc-modified-channels-alist)) |
| 839 | (faces (mapcar 'cddr erc-modified-channels-alist)) |
| 840 | (long-names (mapcar #'(lambda (buf) |
| 841 | (or (buffer-name buf) |
| 842 | "")) |
| 843 | buffers)) |
| 844 | (short-names (if (functionp erc-track-shorten-function) |
| 845 | (funcall erc-track-shorten-function |
| 846 | long-names) |
| 847 | long-names)) |
| 848 | strings) |
| 849 | (while buffers |
| 850 | (when (car short-names) |
| 851 | (setq strings (cons (erc-make-mode-line-buffer-name |
| 852 | (car short-names) |
| 853 | (car buffers) |
| 854 | (car faces) |
| 855 | (car counts)) |
| 856 | strings))) |
| 857 | (setq short-names (cdr short-names) |
| 858 | buffers (cdr buffers) |
| 859 | counts (cdr counts) |
| 860 | faces (cdr faces))) |
| 861 | (when (featurep 'xemacs) |
| 862 | (erc-modified-channels-object nil)) |
| 863 | (setq erc-modified-channels-object |
| 864 | (erc-modified-channels-object strings)))))) |
| 865 | |
| 866 | (defun erc-modified-channels-remove-buffer (buffer) |
| 867 | "Remove BUFFER from `erc-modified-channels-alist'." |
| 868 | (interactive "bBuffer: ") |
| 869 | (setq erc-modified-channels-alist |
| 870 | (delete (assq buffer erc-modified-channels-alist) |
| 871 | erc-modified-channels-alist)) |
| 872 | (when (interactive-p) |
| 873 | (erc-modified-channels-display))) |
| 874 | |
| 875 | (defun erc-track-find-face (faces) |
| 876 | "Return the face to use in the mode line from the faces in FACES. |
| 877 | If `erc-track-faces-priority-list' is set, the one from FACES who |
| 878 | is first in that list will be used. If nothing matches or if |
| 879 | `erc-track-faces-priority-list' is not set, the default mode-line |
| 880 | faces will be used. |
| 881 | |
| 882 | If `erc-track-faces-normal-list' is non-nil, use it to produce a |
| 883 | blinking effect that indicates channel activity when the first |
| 884 | element in FACES and the highest-ranking face among the rest of |
| 885 | FACES are both members of `erc-track-faces-normal-list'. |
| 886 | |
| 887 | If one of the faces is a list, then it will be ranked according |
| 888 | to its highest-tanking face member. A list of faces including |
| 889 | that member will take priority over just the single member |
| 890 | element." |
| 891 | (let ((choice (catch 'face |
| 892 | (dolist (candidate erc-track-faces-priority-list) |
| 893 | (when (member candidate faces) |
| 894 | (throw 'face candidate))))) |
| 895 | (no-first (and erc-track-faces-normal-list |
| 896 | (catch 'face |
| 897 | (dolist (candidate erc-track-faces-priority-list) |
| 898 | (when (member candidate (cdr faces)) |
| 899 | (throw 'face candidate))))))) |
| 900 | (cond ((null choice) |
| 901 | nil) |
| 902 | ((and (member choice erc-track-faces-normal-list) |
| 903 | (member no-first erc-track-faces-normal-list)) |
| 904 | no-first) |
| 905 | (t |
| 906 | choice)))) |
| 907 | |
| 908 | (defun erc-track-modified-channels () |
| 909 | "Hook function for `erc-insert-post-hook' to check if the current |
| 910 | buffer should be added to the mode line as a hidden, modified |
| 911 | channel. Assumes it will only be called when current-buffer |
| 912 | is in `erc-mode'." |
| 913 | (let ((this-channel (or (erc-default-target) |
| 914 | (buffer-name (current-buffer))))) |
| 915 | (if (and (not (erc-buffer-visible (current-buffer))) |
| 916 | (not (member this-channel erc-track-exclude)) |
| 917 | (not (and erc-track-exclude-server-buffer |
| 918 | (erc-server-buffer-p))) |
| 919 | (not (erc-message-type-member |
| 920 | (or (erc-find-parsed-property) |
| 921 | (point-min)) |
| 922 | erc-track-exclude-types))) |
| 923 | ;; If the active buffer is not visible (not shown in a |
| 924 | ;; window), and not to be excluded, determine the kinds of |
| 925 | ;; faces used in the current message, and unless the user |
| 926 | ;; wants to ignore changes in certain channels where there |
| 927 | ;; are no faces corresponding to `erc-track-faces-priority-list', |
| 928 | ;; and the faces in the current message are found in said |
| 929 | ;; priority list, add the buffer to the erc-modified-channels-alist, |
| 930 | ;; if it is not already there. If the buffer is already on the list |
| 931 | ;; (in the car), change its face attribute (in the cddr) if |
| 932 | ;; necessary. See `erc-modified-channels-alist' for the |
| 933 | ;; exact data structure used. |
| 934 | (let ((faces (erc-faces-in (buffer-string)))) |
| 935 | (unless (and |
| 936 | (or (eq erc-track-priority-faces-only 'all) |
| 937 | (member this-channel erc-track-priority-faces-only)) |
| 938 | (not (catch 'found |
| 939 | (dolist (f faces) |
| 940 | (when (member f erc-track-faces-priority-list) |
| 941 | (throw 'found t)))))) |
| 942 | (if (not (assq (current-buffer) erc-modified-channels-alist)) |
| 943 | ;; Add buffer, faces and counts |
| 944 | (setq erc-modified-channels-alist |
| 945 | (cons (cons (current-buffer) |
| 946 | (cons 1 (erc-track-find-face faces))) |
| 947 | erc-modified-channels-alist)) |
| 948 | ;; Else modify the face for the buffer, if necessary. |
| 949 | (when faces |
| 950 | (let* ((cell (assq (current-buffer) |
| 951 | erc-modified-channels-alist)) |
| 952 | (old-face (cddr cell)) |
| 953 | (new-face (erc-track-find-face |
| 954 | (if old-face |
| 955 | (cons old-face faces) |
| 956 | faces)))) |
| 957 | (setcdr cell (cons (1+ (cadr cell)) new-face))))) |
| 958 | ;; And display it |
| 959 | (erc-modified-channels-display))) |
| 960 | ;; Else if the active buffer is the current buffer, remove it |
| 961 | ;; from our list. |
| 962 | (when (and (or (erc-buffer-visible (current-buffer)) |
| 963 | (and this-channel |
| 964 | (member this-channel erc-track-exclude))) |
| 965 | (assq (current-buffer) erc-modified-channels-alist)) |
| 966 | ;; Remove it from mode-line if buffer is visible or |
| 967 | ;; channel was added to erc-track-exclude recently. |
| 968 | (erc-modified-channels-remove-buffer (current-buffer)) |
| 969 | (erc-modified-channels-display))))) |
| 970 | |
| 971 | (defun erc-faces-in (str) |
| 972 | "Return a list of all faces used in STR." |
| 973 | (let ((i 0) |
| 974 | (m (length str)) |
| 975 | (faces (erc-list (get-text-property 0 'face str))) |
| 976 | cur) |
| 977 | (while (and (setq i (next-single-property-change i 'face str m)) |
| 978 | (not (= i m))) |
| 979 | (when (setq cur (get-text-property i 'face str)) |
| 980 | (add-to-list 'faces cur))) |
| 981 | faces)) |
| 982 | |
| 983 | (assert |
| 984 | (let ((str "is bold")) |
| 985 | (put-text-property 3 (length str) |
| 986 | 'face '(bold erc-current-nick-face) |
| 987 | str) |
| 988 | (erc-faces-in str))) |
| 989 | |
| 990 | ;;; Buffer switching |
| 991 | |
| 992 | (defvar erc-track-last-non-erc-buffer nil |
| 993 | "Stores the name of the last buffer you were in before activating |
| 994 | `erc-track-switch-buffers'") |
| 995 | |
| 996 | (defun erc-track-sort-by-activest () |
| 997 | "Sort erc-modified-channels-alist by activity. |
| 998 | That means the number of unseen messages in a channel." |
| 999 | (setq erc-modified-channels-alist |
| 1000 | (sort erc-modified-channels-alist |
| 1001 | (lambda (a b) (> (nth 1 a) (nth 1 b)))))) |
| 1002 | |
| 1003 | (defun erc-track-face-priority (face) |
| 1004 | "Return a number indicating the priority of FACE in |
| 1005 | `erc-track-faces-priority-list'. Lower number means higher |
| 1006 | priority. |
| 1007 | |
| 1008 | If face is not in `erc-track-faces-priority-list', it will have a |
| 1009 | higher number than any other face in that list." |
| 1010 | (let ((count 0)) |
| 1011 | (catch 'done |
| 1012 | (dolist (item erc-track-faces-priority-list) |
| 1013 | (if (equal item face) |
| 1014 | (throw 'done t) |
| 1015 | (setq count (1+ count))))) |
| 1016 | count)) |
| 1017 | |
| 1018 | (defun erc-track-sort-by-importance () |
| 1019 | "Sort erc-modified-channels-alist by importance. |
| 1020 | That means the position of the face in `erc-track-faces-priority-list'." |
| 1021 | (setq erc-modified-channels-alist |
| 1022 | (sort erc-modified-channels-alist |
| 1023 | (lambda (a b) (< (erc-track-face-priority (cddr a)) |
| 1024 | (erc-track-face-priority (cddr b))))))) |
| 1025 | |
| 1026 | (defun erc-track-get-active-buffer (arg) |
| 1027 | "Return the buffer name of ARG in `erc-modified-channels-alist'. |
| 1028 | Negative arguments index in the opposite direction. This direction is |
| 1029 | relative to `erc-track-switch-direction'" |
| 1030 | (let ((dir erc-track-switch-direction) |
| 1031 | offset) |
| 1032 | (when (< arg 0) |
| 1033 | (setq dir (case dir |
| 1034 | (oldest 'newest) |
| 1035 | (newest 'oldest) |
| 1036 | (mostactive 'leastactive) |
| 1037 | (leastactive 'mostactive) |
| 1038 | (importance 'oldest))) |
| 1039 | (setq arg (- arg))) |
| 1040 | (setq offset (case dir |
| 1041 | ((oldest leastactive) |
| 1042 | (- (length erc-modified-channels-alist) arg)) |
| 1043 | (t (1- arg)))) |
| 1044 | ;; normalize out of range user input |
| 1045 | (cond ((>= offset (length erc-modified-channels-alist)) |
| 1046 | (setq offset (1- (length erc-modified-channels-alist)))) |
| 1047 | ((< offset 0) |
| 1048 | (setq offset 0))) |
| 1049 | (car (nth offset erc-modified-channels-alist)))) |
| 1050 | |
| 1051 | (defun erc-track-switch-buffer (arg) |
| 1052 | "Switch to the next active ERC buffer, or if there are no active buffers, |
| 1053 | switch back to the last non-ERC buffer visited. Next is defined by |
| 1054 | `erc-track-switch-direction', a negative argument will reverse this." |
| 1055 | (interactive "p") |
| 1056 | (if (not erc-track-mode) |
| 1057 | (message (concat "Enable the ERC track module if you want to use the" |
| 1058 | " tracking minor mode")) |
| 1059 | (cond (erc-modified-channels-alist |
| 1060 | ;; if we're not in erc-mode, set this buffer to return to |
| 1061 | (unless (eq major-mode 'erc-mode) |
| 1062 | (setq erc-track-last-non-erc-buffer (current-buffer))) |
| 1063 | ;; and jump to the next active channel |
| 1064 | (switch-to-buffer (erc-track-get-active-buffer arg))) |
| 1065 | ;; if no active channels, switch back to what we were doing before |
| 1066 | ((and erc-track-last-non-erc-buffer |
| 1067 | erc-track-switch-from-erc |
| 1068 | (buffer-live-p erc-track-last-non-erc-buffer)) |
| 1069 | (switch-to-buffer erc-track-last-non-erc-buffer))))) |
| 1070 | |
| 1071 | (provide 'erc-track) |
| 1072 | |
| 1073 | ;;; erc-track.el ends here |
| 1074 | ;; |
| 1075 | ;; Local Variables: |
| 1076 | ;; indent-tabs-mode: t |
| 1077 | ;; tab-width: 8 |
| 1078 | ;; End: |