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e8af40ee | 1 | ;;; info-look.el --- major-mode-sensitive Info index lookup facility |
5a79736d RS |
2 | ;; An older version of this was known as libc.el. |
3 | ||
0d30b337 | 4 | ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2003, |
d7a0267c | 5 | ;; 2004, 2005, 2006, 2007 Free Software Foundation, Inc. |
5a79736d | 6 | |
3b361901 | 7 | ;; Author: Ralph Schleicher <rs@nunatak.allgaeu.org> |
fdba4ab4 | 8 | ;; (did not show signs of life (Nov 2001) -stef) |
5a79736d RS |
9 | ;; Keywords: help languages |
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 | |
b4aa6026 | 15 | ;; the Free Software Foundation; either version 3, or (at your option) |
5a79736d RS |
16 | ;; 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; see the file COPYING. If not, write to the | |
086add15 LK |
25 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
26 | ;; Boston, MA 02110-1301, USA. | |
5a79736d | 27 | |
41b1cae7 SM |
28 | ;;; Commentary: |
29 | ||
30 | ;; Really cool code to lookup info indexes. | |
b3a3e4e1 | 31 | ;; Try especially info-lookup-symbol (aka C-h S). |
41b1cae7 | 32 | |
5a79736d RS |
33 | ;;; Code: |
34 | ||
35 | (require 'info) | |
d2c2b883 RS |
36 | |
37 | (defgroup info-lookup nil | |
38 | "Major mode sensitive help agent." | |
39 | :group 'help :group 'languages) | |
5a79736d RS |
40 | |
41 | (defvar info-lookup-mode nil | |
d2c2b883 RS |
42 | "Symbol of the current buffer's help mode. |
43 | Help is provided according to the buffer's major mode if value is nil. | |
5a79736d RS |
44 | Automatically becomes buffer local when set in any fashion.") |
45 | (make-variable-buffer-local 'info-lookup-mode) | |
46 | ||
d2c2b883 RS |
47 | (defcustom info-lookup-other-window-flag t |
48 | "Non-nil means pop up the Info buffer in another window." | |
49 | :group 'info-lookup :type 'boolean) | |
5a79736d | 50 | |
8270a848 | 51 | (defcustom info-lookup-highlight-face 'match |
d2c2b883 RS |
52 | "Face for highlighting looked up help items. |
53 | Setting this variable to nil disables highlighting." | |
54 | :group 'info-lookup :type 'face) | |
5a79736d RS |
55 | |
56 | (defvar info-lookup-highlight-overlay nil | |
57 | "Overlay object used for highlighting.") | |
58 | ||
9d37318d | 59 | (defcustom info-lookup-file-name-alist |
28a2ca5d | 60 | '(("\\`ac\\(local\\|site\\|include\\)\\.m4\\'" . autoconf-mode)) |
9d37318d KH |
61 | "Alist of file names handled specially. |
62 | List elements are cons cells of the form | |
63 | ||
64 | (REGEXP . MODE) | |
65 | ||
66 | If a file name matches REGEXP, then use help mode MODE instead of the | |
67 | buffer's major mode." | |
68 | :group 'info-lookup :type '(repeat (cons (string :tag "Regexp") | |
69 | (symbol :tag "Mode")))) | |
70 | ||
5a79736d RS |
71 | (defvar info-lookup-history nil |
72 | "History of previous input lines.") | |
73 | ||
d2c2b883 RS |
74 | (defvar info-lookup-alist nil |
75 | "Alist of known help topics. | |
5a79736d RS |
76 | Cons cells are of the form |
77 | ||
d2c2b883 | 78 | (HELP-TOPIC . HELP-DATA) |
5a79736d RS |
79 | |
80 | HELP-TOPIC is the symbol of a help topic. | |
d2c2b883 | 81 | HELP-DATA is a HELP-TOPIC's public data set. |
5a79736d RS |
82 | Value is an alist with elements of the form |
83 | ||
84 | (HELP-MODE REGEXP IGNORE-CASE DOC-SPEC PARSE-RULE OTHER-MODES) | |
85 | ||
86 | HELP-MODE is a mode's symbol. | |
87 | REGEXP is a regular expression matching those help items whose | |
88 | documentation can be looked up via DOC-SPEC. | |
89 | IGNORE-CASE is non-nil if help items are case insensitive. | |
90 | DOC-SPEC is a list of documentation specifications of the form | |
91 | ||
92 | (INFO-NODE TRANS-FUNC PREFIX SUFFIX) | |
93 | ||
94 | INFO-NODE is the name (including file name part) of an Info index. | |
95 | TRANS-FUNC is a function translating index entries into help items; | |
96 | nil means add only those index entries matching REGEXP, a string | |
97 | means prepend string to the first word of all index entries. | |
98 | PREFIX and SUFFIX are parts of a regular expression. If one of | |
99 | them is non-nil then search the help item's Info node for the | |
100 | first occurrence of the regular expression `PREFIX ITEM SUFFIX'. | |
101 | ITEM will be highlighted with `info-lookup-highlight-face' if this | |
102 | variable is not nil. | |
103 | PARSE-RULE is either the symbol name of a function or a regular | |
104 | expression for guessing the default help item at point. Fuzzy | |
105 | regular expressions like \"[_a-zA-Z0-9]+\" do a better job if | |
106 | there are no clear delimiters; do not try to write too complex | |
107 | expressions. PARSE-RULE defaults to REGEXP. | |
108 | OTHER-MODES is a list of cross references to other help modes.") | |
109 | ||
110 | (defsubst info-lookup->topic-value (topic) | |
d2c2b883 | 111 | (cdr (assoc topic info-lookup-alist))) |
5a79736d RS |
112 | |
113 | (defsubst info-lookup->mode-value (topic mode) | |
114 | (assoc mode (info-lookup->topic-value topic))) | |
115 | ||
116 | (defsubst info-lookup->regexp (topic mode) | |
117 | (nth 1 (info-lookup->mode-value topic mode))) | |
118 | ||
119 | (defsubst info-lookup->ignore-case (topic mode) | |
120 | (nth 2 (info-lookup->mode-value topic mode))) | |
121 | ||
122 | (defsubst info-lookup->doc-spec (topic mode) | |
123 | (nth 3 (info-lookup->mode-value topic mode))) | |
124 | ||
125 | (defsubst info-lookup->parse-rule (topic mode) | |
126 | (nth 4 (info-lookup->mode-value topic mode))) | |
127 | ||
128 | (defsubst info-lookup->other-modes (topic mode) | |
129 | (nth 5 (info-lookup->mode-value topic mode))) | |
130 | ||
d2c2b883 RS |
131 | (defun info-lookup-add-help (&rest arg) |
132 | "Add or update a help specification. | |
133 | Function arguments are one or more options of the form | |
134 | ||
135 | KEYWORD ARGUMENT | |
136 | ||
137 | KEYWORD is either `:topic', `:mode', `:regexp', `:ignore-case', | |
138 | `:doc-spec', `:parse-rule', or `:other-modes'. | |
139 | ARGUMENT has a value as explained in the documentation of the | |
140 | variable `info-lookup-alist'. | |
141 | ||
142 | If no topic or mode option has been specified, then the help topic defaults | |
143 | to `symbol', and the help mode defaults to the current major mode." | |
144 | (apply 'info-lookup-add-help* nil arg)) | |
145 | ||
146 | (defun info-lookup-maybe-add-help (&rest arg) | |
41b1cae7 | 147 | "Add a help specification iff none is defined. |
d2c2b883 RS |
148 | See the documentation of the function `info-lookup-add-help' |
149 | for more details." | |
150 | (apply 'info-lookup-add-help* t arg)) | |
151 | ||
152 | (defun info-lookup-add-help* (maybe &rest arg) | |
153 | (let (topic mode regexp ignore-case doc-spec | |
154 | parse-rule other-modes keyword value) | |
155 | (setq topic 'symbol | |
156 | mode major-mode | |
157 | regexp "\\w+") | |
158 | (while arg | |
159 | (setq keyword (car arg)) | |
160 | (or (symbolp keyword) | |
161 | (error "Junk in argument list \"%S\"" arg)) | |
162 | (setq arg (cdr arg)) | |
163 | (and (null arg) | |
164 | (error "Keyword \"%S\" is missing an argument" keyword)) | |
165 | (setq value (car arg) | |
166 | arg (cdr arg)) | |
167 | (cond ((eq keyword :topic) | |
168 | (setq topic value)) | |
169 | ((eq keyword :mode) | |
170 | (setq mode value)) | |
171 | ((eq keyword :regexp) | |
172 | (setq regexp value)) | |
173 | ((eq keyword :ignore-case) | |
174 | (setq ignore-case value)) | |
175 | ((eq keyword :doc-spec) | |
176 | (setq doc-spec value)) | |
177 | ((eq keyword :parse-rule) | |
178 | (setq parse-rule value)) | |
179 | ((eq keyword :other-modes) | |
180 | (setq other-modes value)) | |
181 | (t | |
182 | (error "Unknown keyword \"%S\"" keyword)))) | |
183 | (or (and maybe (info-lookup->mode-value topic mode)) | |
184 | (let* ((data (list regexp ignore-case doc-spec parse-rule other-modes)) | |
185 | (topic-cell (or (assoc topic info-lookup-alist) | |
186 | (car (setq info-lookup-alist | |
187 | (cons (cons topic nil) | |
188 | info-lookup-alist))))) | |
189 | (mode-cell (assoc mode topic-cell))) | |
190 | (if (null mode-cell) | |
191 | (setcdr topic-cell (cons (cons mode data) (cdr topic-cell))) | |
192 | (setcdr mode-cell data)))) | |
193 | nil)) | |
194 | ||
5a79736d RS |
195 | (defvar info-lookup-cache nil |
196 | "Cache storing data maintained automatically by the program. | |
197 | Value is an alist with cons cell of the form | |
198 | ||
199 | (HELP-TOPIC . ((HELP-MODE INITIALIZED COMPLETIONS REFER-MODES) ...)) | |
200 | ||
201 | HELP-TOPIC is the symbol of a help topic. | |
202 | HELP-MODE is a mode's symbol. | |
203 | INITIALIZED is nil if HELP-MODE is uninitialized, t if | |
204 | HELP-MODE is initialized, and `0' means HELP-MODE is | |
205 | initialized but void. | |
206 | COMPLETIONS is an alist of documented help items. | |
207 | REFER-MODES is a list of other help modes to use.") | |
208 | ||
209 | (defsubst info-lookup->cache (topic) | |
210 | (or (assoc topic info-lookup-cache) | |
211 | (car (setq info-lookup-cache | |
212 | (cons (cons topic nil) | |
213 | info-lookup-cache))))) | |
214 | ||
0c10ee28 | 215 | (defun info-lookup->topic-cache (topic) |
5a79736d RS |
216 | (cdr (info-lookup->cache topic))) |
217 | ||
0c10ee28 | 218 | (defun info-lookup->mode-cache (topic mode) |
5a79736d RS |
219 | (assoc mode (info-lookup->topic-cache topic))) |
220 | ||
0c10ee28 | 221 | (defun info-lookup->initialized (topic mode) |
5a79736d RS |
222 | (nth 1 (info-lookup->mode-cache topic mode))) |
223 | ||
0c10ee28 | 224 | (defun info-lookup->completions (topic mode) |
5a79736d RS |
225 | (or (info-lookup->initialized topic mode) |
226 | (info-lookup-setup-mode topic mode)) | |
227 | (nth 2 (info-lookup->mode-cache topic mode))) | |
228 | ||
0c10ee28 | 229 | (defun info-lookup->refer-modes (topic mode) |
5a79736d RS |
230 | (or (info-lookup->initialized topic mode) |
231 | (info-lookup-setup-mode topic mode)) | |
232 | (nth 3 (info-lookup->mode-cache topic mode))) | |
233 | ||
0c10ee28 | 234 | (defun info-lookup->all-modes (topic mode) |
5a79736d RS |
235 | (cons mode (info-lookup->refer-modes topic mode))) |
236 | ||
0c10ee28 RS |
237 | (defun info-lookup-quick-all-modes (topic mode) |
238 | (cons mode (info-lookup->other-modes topic mode))) | |
239 | ||
5a79736d RS |
240 | ;;;###autoload |
241 | (defun info-lookup-reset () | |
242 | "Throw away all cached data. | |
243 | This command is useful if the user wants to start at the beginning without | |
244 | quitting Emacs, for example, after some Info documents were updated on the | |
245 | system." | |
246 | (interactive) | |
247 | (setq info-lookup-cache nil)) | |
248 | ||
99400b3e | 249 | ;;;###autoload (put 'info-lookup-symbol 'info-file "emacs") |
5a79736d RS |
250 | ;;;###autoload |
251 | (defun info-lookup-symbol (symbol &optional mode) | |
3481a5c0 | 252 | "Display the definition of SYMBOL, as found in the relevant manual. |
ec4ef174 EZ |
253 | When this command is called interactively, it reads SYMBOL from the |
254 | minibuffer. In the minibuffer, use M-n to yank the default argument | |
255 | value into the minibuffer so you can edit it. The default symbol is the | |
256 | one found at point. | |
b108eac2 KH |
257 | |
258 | With prefix arg a query for the symbol help mode is offered." | |
5a79736d | 259 | (interactive |
b108eac2 | 260 | (info-lookup-interactive-arguments 'symbol current-prefix-arg)) |
5a79736d RS |
261 | (info-lookup 'symbol symbol mode)) |
262 | ||
99400b3e | 263 | ;;;###autoload (put 'info-lookup-file 'info-file "emacs") |
5a79736d RS |
264 | ;;;###autoload |
265 | (defun info-lookup-file (file &optional mode) | |
266 | "Display the documentation of a file. | |
3481a5c0 KH |
267 | When this command is called interactively, it reads FILE from the minibuffer. |
268 | In the minibuffer, use M-n to yank the default file name | |
269 | into the minibuffer so you can edit it. | |
b108eac2 KH |
270 | The default file name is the one found at point. |
271 | ||
272 | With prefix arg a query for the file help mode is offered." | |
5a79736d | 273 | (interactive |
b108eac2 | 274 | (info-lookup-interactive-arguments 'file current-prefix-arg)) |
5a79736d RS |
275 | (info-lookup 'file file mode)) |
276 | ||
b108eac2 KH |
277 | (defun info-lookup-interactive-arguments (topic &optional query) |
278 | "Read and return argument value (and help mode) for help topic TOPIC. | |
279 | If optional argument QUERY is non-nil, query for the help mode." | |
280 | (let* ((mode (cond (query | |
281 | (info-lookup-change-mode topic)) | |
282 | ((info-lookup->mode-value topic (info-lookup-select-mode)) | |
283 | info-lookup-mode) | |
284 | ((info-lookup-change-mode topic)))) | |
5a79736d RS |
285 | (completions (info-lookup->completions topic mode)) |
286 | (default (info-lookup-guess-default topic mode)) | |
5a79736d RS |
287 | (completion-ignore-case (info-lookup->ignore-case topic mode)) |
288 | (enable-recursive-minibuffers t) | |
289 | (value (completing-read | |
3481a5c0 | 290 | (if default |
5a79736d RS |
291 | (format "Describe %s (default %s): " topic default) |
292 | (format "Describe %s: " topic)) | |
3481a5c0 | 293 | completions nil nil nil 'info-lookup-history default))) |
5a79736d RS |
294 | (list (if (equal value "") default value) mode))) |
295 | ||
9d37318d KH |
296 | (defun info-lookup-select-mode () |
297 | (when (and (not info-lookup-mode) (buffer-file-name)) | |
298 | (let ((file-name (file-name-nondirectory (buffer-file-name))) | |
299 | (file-name-alist info-lookup-file-name-alist)) | |
300 | (while (and (not info-lookup-mode) file-name-alist) | |
301 | (when (string-match (caar file-name-alist) file-name) | |
302 | (setq info-lookup-mode (cdar file-name-alist))) | |
303 | (setq file-name-alist (cdr file-name-alist))))) | |
304 | (or info-lookup-mode (setq info-lookup-mode major-mode))) | |
305 | ||
5a79736d RS |
306 | (defun info-lookup-change-mode (topic) |
307 | (let* ((completions (mapcar (lambda (arg) | |
308 | (cons (symbol-name (car arg)) (car arg))) | |
309 | (info-lookup->topic-value topic))) | |
310 | (mode (completing-read | |
311 | (format "Use %s help mode: " topic) | |
312 | completions nil t nil 'info-lookup-history))) | |
313 | (or (setq mode (cdr (assoc mode completions))) | |
314 | (error "No %s help available" topic)) | |
315 | (or (info-lookup->mode-value topic mode) | |
316 | (error "No %s help available for `%s'" topic mode)) | |
317 | (setq info-lookup-mode mode))) | |
318 | ||
319 | (defun info-lookup (topic item mode) | |
320 | "Display the documentation of a help item." | |
9d37318d | 321 | (or mode (setq mode (info-lookup-select-mode))) |
5a79736d RS |
322 | (or (info-lookup->mode-value topic mode) |
323 | (error "No %s help available for `%s'" topic mode)) | |
7c3da01b RS |
324 | (let* ((completions (info-lookup->completions topic mode)) |
325 | (ignore-case (info-lookup->ignore-case topic mode)) | |
326 | (entry (or (assoc (if ignore-case (downcase item) item) completions) | |
0445150c | 327 | (assoc-string item completions t) |
7c3da01b RS |
328 | (error "Not documented as a %s: %s" topic (or item "")))) |
329 | (modes (info-lookup->all-modes topic mode)) | |
330 | (window (selected-window)) | |
331 | found doc-spec node prefix suffix doc-found) | |
947faf4f JL |
332 | (if (not (eq major-mode 'Info-mode)) |
333 | (if (not info-lookup-other-window-flag) | |
334 | (info) | |
335 | (progn | |
336 | (save-window-excursion (info)) | |
337 | ;; Determine whether or not the Info buffer is visible in | |
338 | ;; another frame on the same display. If it is, simply raise | |
339 | ;; that frame. Otherwise, display it in another window. | |
340 | (let* ((window (get-buffer-window "*info*" t)) | |
341 | (info-frame (and window (window-frame window)))) | |
342 | (if (and info-frame | |
343 | (display-multi-frame-p) | |
344 | (memq info-frame (frames-on-display-list)) | |
345 | (not (eq info-frame (selected-frame)))) | |
346 | (select-frame info-frame) | |
347 | (switch-to-buffer-other-window "*info*")))))) | |
5a79736d RS |
348 | (while (and (not found) modes) |
349 | (setq doc-spec (info-lookup->doc-spec topic (car modes))) | |
350 | (while (and (not found) doc-spec) | |
351 | (setq node (nth 0 (car doc-spec)) | |
352 | prefix (nth 2 (car doc-spec)) | |
353 | suffix (nth 3 (car doc-spec))) | |
1d010333 | 354 | (when (condition-case error-data |
e35ccb9e | 355 | (progn |
e8d2103a EZ |
356 | ;; Don't need Index menu fontifications here, and |
357 | ;; they slow down the lookup. | |
358 | (let (Info-fontify-maximum-menu-size) | |
359 | (Info-goto-node node) | |
360 | (setq doc-found t))) | |
e35ccb9e | 361 | (error |
1d010333 RS |
362 | (message "Cannot access Info node %s" node) |
363 | (sit-for 1) | |
364 | nil)) | |
365 | (condition-case nil | |
366 | (progn | |
7c3da01b RS |
367 | ;; Don't use Info-menu, it forces case-fold-search to t |
368 | (let ((case-fold-search nil)) | |
369 | (re-search-forward | |
370 | (concat "^\\* " (regexp-quote (or (cdr entry) (car entry))) | |
371 | ":"))) | |
372 | (Info-follow-nearest-node) | |
1d010333 RS |
373 | (setq found t) |
374 | (if (or prefix suffix) | |
375 | (let ((case-fold-search | |
376 | (info-lookup->ignore-case topic (car modes))) | |
377 | (buffer-read-only nil)) | |
378 | (goto-char (point-min)) | |
379 | (re-search-forward | |
7c3da01b | 380 | (concat prefix (regexp-quote (car entry)) suffix)) |
1d010333 | 381 | (goto-char (match-beginning 0)) |
141d2f67 | 382 | (and (display-color-p) info-lookup-highlight-face |
1d010333 | 383 | ;; Search again for ITEM so that the first |
a5a08b1f | 384 | ;; occurrence of ITEM will be highlighted. |
7c3da01b | 385 | (re-search-forward (regexp-quote (car entry))) |
1d010333 RS |
386 | (let ((start (match-beginning 0)) |
387 | (end (match-end 0))) | |
388 | (if (overlayp info-lookup-highlight-overlay) | |
389 | (move-overlay info-lookup-highlight-overlay | |
390 | start end (current-buffer)) | |
391 | (setq info-lookup-highlight-overlay | |
392 | (make-overlay start end)))) | |
393 | (overlay-put info-lookup-highlight-overlay | |
394 | 'face info-lookup-highlight-face))))) | |
395 | (error nil))) | |
5a79736d RS |
396 | (setq doc-spec (cdr doc-spec))) |
397 | (setq modes (cdr modes))) | |
7c3da01b RS |
398 | ;; Alert the user if case was munged, and do this after bringing up the |
399 | ;; info buffer since that can print messages | |
400 | (unless (or ignore-case | |
401 | (string-equal item (car entry))) | |
021c54a3 | 402 | (message "Found in different case: %s" (car entry))) |
1d010333 RS |
403 | (or doc-found |
404 | (error "Info documentation for lookup was not found")) | |
5a79736d RS |
405 | ;; Don't leave the Info buffer if the help item couldn't be looked up. |
406 | (if (and info-lookup-other-window-flag found) | |
407 | (select-window window)))) | |
408 | ||
409 | (defun info-lookup-setup-mode (topic mode) | |
410 | "Initialize the internal data structure." | |
411 | (or (info-lookup->initialized topic mode) | |
412 | (let (cell data (initialized 0) completions refer-modes) | |
413 | (if (not (info-lookup->mode-value topic mode)) | |
414 | (message "No %s help available for `%s'" topic mode) | |
415 | ;; Recursively setup cross references. | |
416 | ;; But refer only to non-void modes. | |
538996c7 SM |
417 | (dolist (arg (info-lookup->other-modes topic mode)) |
418 | (or (info-lookup->initialized topic arg) | |
419 | (info-lookup-setup-mode topic arg)) | |
420 | (and (eq (info-lookup->initialized topic arg) t) | |
421 | (setq refer-modes (cons arg refer-modes)))) | |
5a79736d RS |
422 | (setq refer-modes (nreverse refer-modes)) |
423 | ;; Build the full completion alist. | |
424 | (setq completions | |
e12fcc41 KH |
425 | (nconc (condition-case nil |
426 | (info-lookup-make-completions topic mode) | |
427 | (error nil)) | |
5a79736d RS |
428 | (apply 'append |
429 | (mapcar (lambda (arg) | |
430 | (info-lookup->completions topic arg)) | |
431 | refer-modes)))) | |
432 | (setq initialized t)) | |
433 | ;; Update `info-lookup-cache'. | |
434 | (setq cell (info-lookup->mode-cache topic mode) | |
435 | data (list initialized completions refer-modes)) | |
436 | (if (not cell) | |
437 | (setcdr (info-lookup->cache topic) | |
438 | (cons (cons mode data) (info-lookup->topic-cache topic))) | |
439 | (setcdr cell data)) | |
440 | initialized))) | |
441 | ||
442 | (defun info-lookup-make-completions (topic mode) | |
443 | "Create a unique alist from all index entries." | |
1eff0ba1 RS |
444 | (let ((doc-spec (info-lookup->doc-spec topic mode)) |
445 | (regexp (concat "^\\(" (info-lookup->regexp topic mode) | |
446 | "\\)\\([ \t].*\\)?$")) | |
493cf720 | 447 | Info-fontify-maximum-menu-size |
1d010333 | 448 | node trans entry item prefix result doc-found |
1eff0ba1 RS |
449 | (buffer (get-buffer-create " temp-info-look"))) |
450 | (with-current-buffer buffer | |
451 | (Info-mode)) | |
452 | (while doc-spec | |
453 | (setq node (nth 0 (car doc-spec)) | |
454 | trans (cond ((eq (nth 1 (car doc-spec)) nil) | |
455 | (lambda (arg) | |
456 | (if (string-match regexp arg) | |
457 | (match-string 1 arg)))) | |
458 | ((stringp (nth 1 (car doc-spec))) | |
459 | (setq prefix (nth 1 (car doc-spec))) | |
460 | (lambda (arg) | |
461 | (if (string-match "^\\([^: \t\n]+\\)" arg) | |
462 | (concat prefix (match-string 1 arg))))) | |
463 | (t (nth 1 (car doc-spec))))) | |
1d010333 RS |
464 | (with-current-buffer buffer |
465 | (message "Processing Info node `%s'..." node) | |
466 | (when (condition-case error-data | |
e35ccb9e | 467 | (progn |
1d010333 RS |
468 | (Info-goto-node node) |
469 | (setq doc-found t)) | |
e35ccb9e | 470 | (error |
1d010333 RS |
471 | (message "Cannot access Info node `%s'" node) |
472 | (sit-for 1) | |
473 | nil)) | |
474 | (condition-case nil | |
475 | (progn | |
476 | (goto-char (point-min)) | |
477 | (and (search-forward "\n* Menu:" nil t) | |
bdb0f2d5 | 478 | (while (re-search-forward "\n\\* \\(.*\\): " nil t) |
1d010333 RS |
479 | (setq entry (match-string 1) |
480 | item (funcall trans entry)) | |
6480a693 DL |
481 | ;; `trans' can return nil if the regexp doesn't match. |
482 | (when (and item | |
483 | ;; Sometimes there's more than one Menu: | |
e35ccb9e | 484 | (not (string= entry "Menu"))) |
6480a693 DL |
485 | (and (info-lookup->ignore-case topic mode) |
486 | (setq item (downcase item))) | |
487 | (and (string-equal entry item) | |
488 | (setq entry nil)) | |
489 | (and (or (assoc item result) | |
490 | (setq result (cons (cons item entry) | |
491 | result)))))))) | |
1d010333 | 492 | (error nil)))) |
1eff0ba1 RS |
493 | (message "Processing Info node `%s'...done" node) |
494 | (setq doc-spec (cdr doc-spec))) | |
1d010333 RS |
495 | (or doc-found |
496 | (error "Info documentation for lookup was not found")) | |
1eff0ba1 | 497 | result)) |
5a79736d RS |
498 | |
499 | (defun info-lookup-guess-default (topic mode) | |
ce288cb6 KH |
500 | "Return a guess for a symbol to look up, based on text around point. |
501 | Try all related modes applicable to TOPIC and MODE. | |
502 | Return nil if there is nothing appropriate in the buffer near point." | |
5a79736d | 503 | (let ((modes (info-lookup->all-modes topic mode)) |
ce288cb6 | 504 | guess) |
5a79736d RS |
505 | (while (and (not guess) modes) |
506 | (setq guess (info-lookup-guess-default* topic (car modes)) | |
ce288cb6 | 507 | modes (cdr modes))) |
5a79736d | 508 | ;; Collapse whitespace characters. |
ce288cb6 KH |
509 | (when guess |
510 | (let ((pos 0)) | |
511 | (while (string-match "[ \t\n]+" guess pos) | |
512 | (setq pos (1+ (match-beginning 0))) | |
513 | (setq guess (replace-match " " t t guess))))) | |
514 | guess)) | |
5a79736d RS |
515 | |
516 | (defun info-lookup-guess-default* (topic mode) | |
517 | (let ((case-fold-search (info-lookup->ignore-case topic mode)) | |
518 | (rule (or (info-lookup->parse-rule topic mode) | |
519 | (info-lookup->regexp topic mode))) | |
520 | (start (point)) end regexp subexp result) | |
ce288cb6 KH |
521 | (save-excursion |
522 | (if (symbolp rule) | |
523 | (setq result (funcall rule)) | |
524 | (if (consp rule) | |
525 | (setq regexp (car rule) | |
526 | subexp (cdr rule)) | |
527 | (setq regexp rule | |
528 | subexp 0)) | |
e35ccb9e DL |
529 | ;; If at start of symbol, don't go back to end of previous one. |
530 | (if (save-match-data | |
531 | (looking-at "[ \t\n]")) | |
532 | (skip-chars-backward " \t\n")) | |
533 | (setq end (point)) | |
ce288cb6 KH |
534 | (while (and (re-search-backward regexp nil t) |
535 | (looking-at regexp) | |
536 | (>= (match-end 0) end)) | |
537 | (setq result (match-string subexp))) | |
538 | (if (not result) | |
539 | (progn | |
540 | (goto-char start) | |
541 | (skip-chars-forward " \t\n") | |
542 | (and (looking-at regexp) | |
543 | (setq result (match-string subexp))))))) | |
5a79736d RS |
544 | result)) |
545 | ||
546 | (defun info-lookup-guess-c-symbol () | |
547 | "Get the C symbol at point." | |
548 | (condition-case nil | |
549 | (progn | |
ce288cb6 | 550 | (skip-syntax-backward "w_") |
5a79736d RS |
551 | (let ((start (point)) prefix name) |
552 | ;; Test for a leading `struct', `union', or `enum' keyword | |
553 | ;; but ignore names like `foo_struct'. | |
554 | (setq prefix (and (< (skip-chars-backward " \t\n") 0) | |
555 | (< (skip-chars-backward "_a-zA-Z0-9") 0) | |
556 | (looking-at "\\(struct\\|union\\|enum\\)\\s ") | |
557 | (concat (match-string 1) " "))) | |
558 | (goto-char start) | |
559 | (and (looking-at "[_a-zA-Z][_a-zA-Z0-9]*") | |
560 | (setq name (match-string 0))) | |
561 | ;; Caveat! Look forward if point is at `struct' etc. | |
562 | (and (not prefix) | |
563 | (or (string-equal name "struct") | |
564 | (string-equal name "union") | |
565 | (string-equal name "enum")) | |
566 | (looking-at "[a-z]+\\s +\\([_a-zA-Z][_a-zA-Z0-9]*\\)") | |
567 | (setq prefix (concat name " ") | |
568 | name (match-string 1))) | |
569 | (and (or prefix name) | |
570 | (concat prefix name)))) | |
571 | (error nil))) | |
572 | ||
ec4ef174 EZ |
573 | (defun info-lookup-guess-custom-symbol () |
574 | "Get symbol at point in custom buffers." | |
575 | (condition-case nil | |
576 | (save-excursion | |
577 | (let ((case-fold-search t) | |
578 | (ignored-chars "][()`',:.\" \t\n") | |
579 | (significant-chars "^][()`',:.\" \t\n") | |
580 | beg end) | |
581 | (cond | |
582 | ((and (memq (get-char-property (point) 'face) | |
583 | '(custom-variable-tag custom-variable-tag-face)) | |
584 | (setq beg (previous-single-char-property-change | |
585 | (point) 'face nil (line-beginning-position))) | |
586 | (setq end (next-single-char-property-change | |
587 | (point) 'face nil (line-end-position))) | |
588 | (> end beg)) | |
589 | (subst-char-in-string | |
4789a3cb | 590 | ?\s ?\- (buffer-substring-no-properties beg end))) |
ec4ef174 EZ |
591 | ((or (and (looking-at (concat "[" significant-chars "]")) |
592 | (save-excursion | |
593 | (skip-chars-backward significant-chars) | |
594 | (setq beg (point))) | |
595 | (skip-chars-forward significant-chars) | |
596 | (setq end (point)) | |
597 | (> end beg)) | |
598 | (and (looking-at "[ \t\n]") | |
599 | (looking-back (concat "[" significant-chars "]")) | |
600 | (setq end (point)) | |
601 | (skip-chars-backward significant-chars) | |
602 | (setq beg (point)) | |
603 | (> end beg)) | |
604 | (and (skip-chars-forward ignored-chars) | |
605 | (setq beg (point)) | |
606 | (skip-chars-forward significant-chars) | |
607 | (setq end (point)) | |
608 | (> end beg))) | |
609 | (buffer-substring-no-properties beg end))))) | |
610 | (error nil))) | |
611 | ||
5a79736d RS |
612 | ;;;###autoload |
613 | (defun info-complete-symbol (&optional mode) | |
614 | "Perform completion on symbol preceding point." | |
82fb111c RS |
615 | (interactive) |
616 | (info-complete 'symbol | |
617 | (or mode | |
618 | (if (info-lookup->mode-value | |
9d37318d KH |
619 | 'symbol (info-lookup-select-mode)) |
620 | info-lookup-mode | |
82fb111c | 621 | (info-lookup-change-mode 'symbol))))) |
5a79736d RS |
622 | |
623 | ;;;###autoload | |
624 | (defun info-complete-file (&optional mode) | |
625 | "Perform completion on file preceding point." | |
a1fee1bc KH |
626 | (interactive) |
627 | (info-complete 'file | |
628 | (or mode | |
629 | (if (info-lookup->mode-value | |
9d37318d KH |
630 | 'file (info-lookup-select-mode)) |
631 | info-lookup-mode | |
a1fee1bc | 632 | (info-lookup-change-mode 'file))))) |
5a79736d RS |
633 | |
634 | (defun info-complete (topic mode) | |
635 | "Try to complete a help item." | |
636 | (barf-if-buffer-read-only) | |
9d37318d | 637 | (or mode (setq mode (info-lookup-select-mode))) |
5a79736d RS |
638 | (or (info-lookup->mode-value topic mode) |
639 | (error "No %s completion available for `%s'" topic mode)) | |
0c10ee28 RS |
640 | (let ((modes (info-lookup-quick-all-modes topic mode)) |
641 | (start (point)) | |
642 | try) | |
5a79736d RS |
643 | (while (and (not try) modes) |
644 | (setq mode (car modes) | |
645 | modes (cdr modes) | |
646 | try (info-lookup-guess-default* topic mode)) | |
647 | (goto-char start)) | |
648 | (and (not try) | |
d2c2b883 | 649 | (error "Found no %S to complete" topic)) |
0c10ee28 RS |
650 | (let ((completions (info-lookup->completions topic mode)) |
651 | (completion-ignore-case (info-lookup->ignore-case topic mode)) | |
652 | completion) | |
653 | (setq completion (try-completion try completions)) | |
654 | (cond ((not completion) | |
655 | (ding) | |
656 | (message "No match")) | |
657 | ((stringp completion) | |
658 | (or (assoc completion completions) | |
659 | (setq completion (completing-read | |
660 | (format "Complete %S: " topic) | |
661 | completions nil t completion | |
662 | info-lookup-history))) | |
e35ccb9e DL |
663 | ;; Find the original symbol and zap it. |
664 | (end-of-line) | |
665 | (while (and (search-backward try nil t) | |
666 | (< start (point)))) | |
667 | (replace-match "") | |
0c10ee28 RS |
668 | (insert completion)) |
669 | (t | |
670 | (message "%s is complete" | |
671 | (capitalize (prin1-to-string topic)))))))) | |
d2c2b883 RS |
672 | |
673 | \f | |
d2c2b883 RS |
674 | ;;; Initialize some common modes. |
675 | ||
676 | (info-lookup-maybe-add-help | |
677 | :mode 'c-mode :topic 'symbol | |
678 | :regexp "\\(struct \\|union \\|enum \\)?[_a-zA-Z][_a-zA-Z0-9]*" | |
679 | :doc-spec '(("(libc)Function Index" nil | |
947faf4f | 680 | "^[ \t]+-+ \\(Function\\|Macro\\): .*\\<" "\\>") |
3b90e932 EZ |
681 | ;; prefix/suffix has to match things like |
682 | ;; " -- Macro: int F_DUPFD" | |
683 | ;; " -- Variable: char * tzname [2]" | |
684 | ;; "`DBL_MAX'" (texinfo @table) | |
685 | ;; suffix "\\>" is not used because that sends DBL_MAX to | |
686 | ;; DBL_MAX_EXP ("_" is a non-word char) | |
d2c2b883 | 687 | ("(libc)Variable Index" nil |
3b90e932 EZ |
688 | "^\\([ \t]+-+ \\(Variable\\|Macro\\): .*\\<\\|`\\)" |
689 | "\\( \\|'?$\\)") | |
d2c2b883 | 690 | ("(libc)Type Index" nil |
947faf4f | 691 | "^[ \t]+-+ Data Type: \\<" "\\>") |
d2c2b883 RS |
692 | ("(termcap)Var Index" nil |
693 | "^[ \t]*`" "'")) | |
694 | :parse-rule 'info-lookup-guess-c-symbol) | |
695 | ||
696 | (info-lookup-maybe-add-help | |
697 | :mode 'c-mode :topic 'file | |
698 | :regexp "[_a-zA-Z0-9./+-]+" | |
699 | :doc-spec '(("(libc)File Index"))) | |
700 | ||
701 | (info-lookup-maybe-add-help | |
702 | :mode 'bison-mode | |
703 | :regexp "[:;|]\\|%\\([%{}]\\|[_a-z]+\\)\\|YY[_A-Z]+\\|yy[_a-z]+" | |
704 | :doc-spec '(("(bison)Index" nil | |
705 | "`" "'")) | |
706 | :parse-rule "[:;|]\\|%\\([%{}]\\|[_a-zA-Z][_a-zA-Z0-9]*\\)" | |
707 | :other-modes '(c-mode)) | |
708 | ||
709 | (info-lookup-maybe-add-help | |
710 | :mode 'makefile-mode | |
711 | :regexp "\\$[^({]\\|\\.[_A-Z]*\\|[_a-zA-Z][_a-zA-Z0-9-]*" | |
712 | :doc-spec '(("(make)Name Index" nil | |
fdba4ab4 SM |
713 | "^[ \t]*`" "'") |
714 | ("(automake)Macro and Variable Index" nil | |
d2c2b883 | 715 | "^[ \t]*`" "'")) |
fdba4ab4 SM |
716 | :parse-rule "\\$[^({]\\|\\.[_A-Z]*\\|[_a-zA-Z0-9-]+" |
717 | :other-modes '(automake-mode)) | |
d2c2b883 RS |
718 | |
719 | (info-lookup-maybe-add-help | |
720 | :mode 'texinfo-mode | |
721 | :regexp "@\\([a-zA-Z]+\\|[^a-zA-Z]\\)" | |
722 | :doc-spec '(("(texinfo)Command and Variable Index" | |
723 | ;; Ignore Emacs commands and prepend a `@'. | |
724 | (lambda (item) | |
725 | (if (string-match "^\\([a-zA-Z]+\\|[^a-zA-Z]\\)\\( .*\\)?$" item) | |
726 | (concat "@" (match-string 1 item)))) | |
947faf4f | 727 | "`" "[' ]"))) |
d2c2b883 RS |
728 | |
729 | (info-lookup-maybe-add-help | |
730 | :mode 'm4-mode | |
731 | :regexp "[_a-zA-Z][_a-zA-Z0-9]*" | |
732 | :doc-spec '(("(m4)Macro index")) | |
733 | :parse-rule "[_a-zA-Z0-9]+") | |
734 | ||
735 | (info-lookup-maybe-add-help | |
736 | :mode 'autoconf-mode | |
737 | :regexp "A[CM]_[_A-Z0-9]+" | |
01e1a819 JB |
738 | :doc-spec '(;; Autoconf Macro Index entries are without an "AC_" prefix, |
739 | ;; but with "AH_" or "AU_" for those. So add "AC_" if there | |
740 | ;; isn't already an "A._". | |
741 | ("(autoconf)Autoconf Macro Index" | |
742 | (lambda (item) | |
743 | (if (string-match "^A._" item) item (concat "AC_" item))) | |
947faf4f | 744 | "^[ \t]+-+ \\(Macro\\|Variable\\): .*\\<" "\\>") |
01e1a819 JB |
745 | ;; M4 Macro Index entries are without "AS_" prefixes, and |
746 | ;; mostly without "m4_" prefixes. "dnl" is an exception, not | |
747 | ;; wanting any prefix. So AS_ is added back to upper-case | |
748 | ;; names, m4_ to others which don't already an m4_. | |
749 | ("(autoconf)M4 Macro Index" | |
750 | (lambda (item) | |
751 | (let ((case-fold-search nil)) | |
752 | (cond ((or (string-equal item "dnl") | |
753 | (string-match "^m4_" item)) | |
754 | item) | |
755 | ((string-match "^[A-Z0-9_]+$" item) | |
756 | (concat "AS_" item)) | |
757 | (t | |
758 | (concat "m4_" item))))) | |
947faf4f | 759 | "^[ \t]+-+ Macro: .*\\<" "\\>") |
01e1a819 JB |
760 | ;; Autotest Macro Index entries are without "AT_". |
761 | ("(autoconf)Autotest Macro Index" "AT_" | |
947faf4f | 762 | "^[ \t]+-+ Macro: .*\\<" "\\>") |
01e1a819 | 763 | ;; This is for older versions (probably pre autoconf 2.5x): |
28a2ca5d | 764 | ("(autoconf)Macro Index" "AC_" |
947faf4f | 765 | "^[ \t]+-+ \\(Macro\\|Variable\\): .*\\<" "\\>") |
01e1a819 JB |
766 | ;; Automake has index entries for its notes on various autoconf |
767 | ;; macros (eg. AC_PROG_CC). Ensure this is after the autoconf | |
768 | ;; index, so as to prefer the autoconf docs. | |
fdba4ab4 | 769 | ("(automake)Macro and Variable Index" nil |
d2c2b883 RS |
770 | "^[ \t]*`" "'")) |
771 | ;; Autoconf symbols are M4 macros. Thus use M4's parser. | |
772 | :parse-rule 'ignore | |
773 | :other-modes '(m4-mode)) | |
774 | ||
775 | (info-lookup-maybe-add-help | |
776 | :mode 'awk-mode | |
777 | :regexp "[_a-zA-Z]+" | |
778 | :doc-spec '(("(gawk)Index" | |
779 | (lambda (item) | |
780 | (let ((case-fold-search nil)) | |
781 | (cond | |
782 | ;; `BEGIN' and `END'. | |
783 | ((string-match "^\\([A-Z]+\\) special pattern\\b" item) | |
784 | (match-string 1 item)) | |
785 | ;; `if', `while', `do', ... | |
786 | ((string-match "^\\([a-z]+\\) statement\\b" item) | |
787 | (if (not (string-equal (match-string 1 item) "control")) | |
788 | (match-string 1 item))) | |
789 | ;; `NR', `NF', ... | |
790 | ((string-match "^[A-Z]+$" item) | |
791 | item) | |
792 | ;; Built-in functions (matches to many entries). | |
793 | ((string-match "^[a-z]+$" item) | |
794 | item)))) | |
795 | "`" "\\([ \t]*([^)]*)\\)?'"))) | |
796 | ||
797 | (info-lookup-maybe-add-help | |
798 | :mode 'perl-mode | |
799 | :regexp "[$@%][^a-zA-Z]\\|\\$\\^[A-Z]\\|[$@%]?[a-zA-Z][_a-zA-Z0-9]*" | |
800 | :doc-spec '(("(perl5)Function Index" | |
801 | (lambda (item) | |
802 | (if (string-match "^\\([a-zA-Z0-9]+\\)" item) | |
803 | (match-string 1 item))) | |
804 | "^" "\\b") | |
805 | ("(perl5)Variable Index" | |
806 | (lambda (item) | |
807 | ;; Work around bad formatted array variables. | |
808 | (let ((sym (cond ((or (string-match "^\\$\\(.\\|@@\\)$" item) | |
809 | (string-match "^\\$\\^[A-Z]$" item)) | |
810 | item) | |
811 | ((string-match | |
812 | "^\\([$%@]\\|@@\\)?[_a-zA-Z0-9]+" item) | |
813 | (match-string 0 item)) | |
814 | (t "")))) | |
815 | (if (string-match "@@" sym) | |
816 | (setq sym (concat (substring sym 0 (match-beginning 0)) | |
817 | (substring sym (1- (match-end 0)))))) | |
818 | (if (string-equal sym "") nil sym))) | |
819 | "^" "\\b")) | |
820 | :parse-rule "[$@%]?\\([_a-zA-Z0-9]+\\|[^a-zA-Z]\\)") | |
821 | ||
41b1cae7 SM |
822 | (info-lookup-maybe-add-help |
823 | :mode 'cperl-mode | |
824 | :regexp "[$@%][^a-zA-Z]\\|\\$\\^[A-Z]\\|[$@%]?[a-zA-Z][_a-zA-Z0-9]*" | |
825 | :other-modes '(perl-mode)) | |
826 | ||
d2c2b883 RS |
827 | (info-lookup-maybe-add-help |
828 | :mode 'latex-mode | |
829 | :regexp "\\\\\\([a-zA-Z]+\\|[^a-zA-Z]\\)" | |
e12fcc41 | 830 | :doc-spec '(("(latex)Command Index" nil |
d2c2b883 RS |
831 | "`" "\\({[^}]*}\\)?'"))) |
832 | ||
833 | (info-lookup-maybe-add-help | |
834 | :mode 'emacs-lisp-mode | |
ec4ef174 | 835 | :regexp "[^][()`',\" \t\n]+" |
16524b9b JB |
836 | :doc-spec '(;; Commands with key sequences appear in nodes as `foo' and |
837 | ;; those without as `M-x foo'. | |
838 | ("(emacs)Command Index" nil "`\\(M-x[ \t\n]+\\)?" "'") | |
839 | ;; Variables normally appear in nodes as just `foo'. | |
840 | ("(emacs)Variable Index" nil "`" "'") | |
841 | ;; Almost all functions, variables, etc appear in nodes as | |
947faf4f | 842 | ;; " -- Function: foo" etc. A small number of aliases and |
16524b9b JB |
843 | ;; symbols appear only as `foo', and will miss out on exact |
844 | ;; positions. Allowing `foo' would hit too many false matches | |
845 | ;; for things that should go to Function: etc, and those latter | |
846 | ;; are much more important. Perhaps this could change if some | |
847 | ;; sort of fallback match scheme existed. | |
947faf4f | 848 | ("(elisp)Index" nil "^ -+ .*: " "\\( \\|$\\)"))) |
d2c2b883 RS |
849 | |
850 | (info-lookup-maybe-add-help | |
851 | :mode 'lisp-interaction-mode | |
ec4ef174 | 852 | :regexp "[^][()`',\" \t\n]+" |
d2c2b883 RS |
853 | :parse-rule 'ignore |
854 | :other-modes '(emacs-lisp-mode)) | |
855 | ||
0c10ee28 RS |
856 | (info-lookup-maybe-add-help |
857 | :mode 'lisp-mode | |
ec4ef174 | 858 | :regexp "[^()`',\" \t\n]+" |
0c10ee28 RS |
859 | :parse-rule 'ignore |
860 | :other-modes '(emacs-lisp-mode)) | |
861 | ||
9d37318d KH |
862 | (info-lookup-maybe-add-help |
863 | :mode 'scheme-mode | |
08d87b2d | 864 | :regexp "[^()`',\" \t\n]+" |
9d37318d | 865 | :ignore-case t |
6480a693 | 866 | ;; Aubrey Jaffer's rendition from <URL:ftp://ftp-swiss.ai.mit.edu/pub/scm> |
9d37318d | 867 | :doc-spec '(("(r5rs)Index" nil |
947faf4f | 868 | "^[ \t]+-+ [^:]+:[ \t]*" "\\b"))) |
9d37318d | 869 | |
054e5c20 SE |
870 | (info-lookup-maybe-add-help |
871 | :mode 'octave-mode | |
872 | :regexp "[_a-zA-Z0-9]+" | |
c6bb2688 | 873 | :doc-spec '(("(octave)Function Index" nil |
947faf4f JL |
874 | "^ -+ [^:]+:[ ]+\\(\\[[^=]*=[ ]+\\)?" nil) |
875 | ("(octave)Variable Index" nil "^ -+ [^:]+:[ ]+" nil) | |
054e5c20 | 876 | ;; Catch lines of the form "xyz statement" |
e35ccb9e | 877 | ("(octave)Concept Index" |
054e5c20 SE |
878 | (lambda (item) |
879 | (cond | |
880 | ((string-match "^\\([A-Z]+\\) statement\\b" item) | |
881 | (match-string 1 item)) | |
882 | (t nil))) | |
947faf4f | 883 | nil; "^ -+ [^:]+:[ ]+" don't think this prefix is useful here. |
054e5c20 | 884 | nil))) |
c0e7fbb8 | 885 | |
b3a3e4e1 SE |
886 | (info-lookup-maybe-add-help |
887 | :mode 'maxima-mode | |
888 | :ignore-case t | |
c99240cc | 889 | :regexp "[a-zA-Z0-9_%]+" |
947faf4f JL |
890 | :doc-spec '( ("(maxima)Function and Variable Index" nil |
891 | "^ -+ [^:]+:[ ]+\\(\\[[^=]*=[ ]+\\)?" nil))) | |
b3a3e4e1 SE |
892 | |
893 | (info-lookup-maybe-add-help | |
894 | :mode 'inferior-maxima-mode | |
c99240cc | 895 | :regexp "[a-zA-Z0-9_%]+" |
b3a3e4e1 SE |
896 | :other-modes '(maxima-mode)) |
897 | ||
c0e7fbb8 | 898 | ;; coreutils and bash builtins overlap in places, eg. printf, so there's a |
c6bb2688 | 899 | ;; question which should come first. Some of the coreutils descriptions are |
c0e7fbb8 JB |
900 | ;; more detailed, but if bash is usually /bin/sh on a GNU system then the |
901 | ;; builtins will be what's normally run. | |
902 | ;; | |
903 | ;; Maybe special variables like $? should be matched as $?, not just ?. | |
904 | ;; This would avoid a clash between variable $! and negation !, or variable | |
905 | ;; $# and comment # (though comment # is not currently indexed in bash). | |
906 | ;; Unfortunately if $? etc is the symbol, then we wouldn't be taken to the | |
907 | ;; exact spot in the relevant node, since the bash manual has just `?' etc | |
908 | ;; there. Maybe an extension to the prefix/suffix scheme could help this. | |
909 | ||
910 | (info-lookup-maybe-add-help | |
911 | :mode 'sh-mode :topic 'symbol | |
912 | ;; bash has "." and ":" in its index, but those chars will probably never | |
913 | ;; work in info, so don't bother matching them in the regexp. | |
914 | :regexp "\\([a-zA-Z0-9_-]+\\|[!{}@*#?$]\\|\\[\\[?\\|]]?\\)" | |
915 | :doc-spec '(("(bash)Builtin Index" nil "^`" "[ .']") | |
916 | ("(bash)Reserved Word Index" nil "^`" "[ .']") | |
917 | ("(bash)Variable Index" nil "^`" "[ .']") | |
918 | ;; coreutils (version 4.5.10) doesn't have a separate program | |
919 | ;; index, so exclude extraneous stuff (most of it) by demanding | |
920 | ;; "[a-z]+" in the trans-func. | |
921 | ("(coreutils)Index" | |
922 | (lambda (item) (if (string-match "\\`[a-z]+\\'" item) item))) | |
923 | ;; diff (version 2.8.1) has only a few programs, index entries | |
924 | ;; are things like "foo invocation". | |
925 | ("(diff)Index" | |
926 | (lambda (item) | |
927 | (if (string-match "\\`\\([a-z]+\\) invocation\\'" item) | |
928 | (match-string 1 item)))) | |
929 | ;; there's no plain "sed" index entry as such, mung another | |
930 | ;; hopefully unique one to get to the invocation section | |
931 | ("(sed)Concept Index" | |
932 | (lambda (item) | |
933 | (if (string-equal item "Standard input, processing as input") | |
934 | "sed"))) | |
935 | ;; there's no plain "awk" or "gawk" index entries, mung other | |
936 | ;; hopefully unique ones to get to the command line options | |
937 | ("(gawk)Index" | |
938 | (lambda (item) | |
939 | (cond ((string-equal item "gawk, extensions, disabling") | |
940 | "awk") | |
941 | ((string-equal item "gawk, versions of, information about, printing") | |
942 | "gawk")))))) | |
538996c7 | 943 | |
7830c895 SM |
944 | ;; This misses some things which occur as node names but not in the |
945 | ;; index. Unfortunately it also picks up the wrong one of multiple | |
946 | ;; entries for the same term in some cases. --fx | |
538996c7 SM |
947 | (info-lookup-maybe-add-help |
948 | :mode 'cfengine-mode | |
1bc897ca | 949 | :regexp "[[:alnum:]_]+\\(?:()\\)?" |
7830c895 SM |
950 | :doc-spec '(("(cfengine-Reference)Variable Index" |
951 | (lambda (item) | |
952 | ;; Index entries may be like `IsPlain()' | |
953 | (if (string-match "\\([[:alnum:]_]+\\)()" item) | |
954 | (match-string 1 item) | |
955 | item)) | |
956 | ;; This gets functions in evaluated classes. Other | |
957 | ;; possible patterns don't seem to work too well. | |
958 | "`" "("))) | |
ec4ef174 EZ |
959 | |
960 | (info-lookup-maybe-add-help | |
961 | :mode 'custom-mode | |
962 | :ignore-case t | |
963 | :regexp "[^][()`',:\" \t\n]+" | |
964 | :parse-rule 'info-lookup-guess-custom-symbol | |
965 | :other-modes '(emacs-lisp-mode)) | |
966 | ||
967 | (info-lookup-maybe-add-help | |
968 | :mode 'help-mode | |
969 | :regexp "[^][()`',:\" \t\n]+" | |
970 | :other-modes '(emacs-lisp-mode)) | |
d2c2b883 | 971 | \f |
5a79736d RS |
972 | (provide 'info-look) |
973 | ||
ab5796a9 | 974 | ;;; arch-tag: 0f1e3ea3-32a2-4461-bbab-3cff93539a74 |
5a79736d | 975 | ;;; info-look.el ends here |