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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, |
409cc4a3 | 5 | ;; 2004, 2005, 2006, 2007, 2008 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 | ||
eb3fa2cf | 13 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
5a79736d | 14 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
15 | ;; the Free Software Foundation, either version 3 of the License, or |
16 | ;; (at your option) any later version. | |
5a79736d RS |
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 | |
eb3fa2cf | 24 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
5a79736d | 25 | |
41b1cae7 SM |
26 | ;;; Commentary: |
27 | ||
28 | ;; Really cool code to lookup info indexes. | |
b3a3e4e1 | 29 | ;; Try especially info-lookup-symbol (aka C-h S). |
41b1cae7 | 30 | |
5a79736d RS |
31 | ;;; Code: |
32 | ||
33 | (require 'info) | |
d2c2b883 RS |
34 | |
35 | (defgroup info-lookup nil | |
36 | "Major mode sensitive help agent." | |
37 | :group 'help :group 'languages) | |
5a79736d RS |
38 | |
39 | (defvar info-lookup-mode nil | |
d2c2b883 RS |
40 | "Symbol of the current buffer's help mode. |
41 | Help is provided according to the buffer's major mode if value is nil. | |
5a79736d RS |
42 | Automatically becomes buffer local when set in any fashion.") |
43 | (make-variable-buffer-local 'info-lookup-mode) | |
44 | ||
d2c2b883 RS |
45 | (defcustom info-lookup-other-window-flag t |
46 | "Non-nil means pop up the Info buffer in another window." | |
47 | :group 'info-lookup :type 'boolean) | |
5a79736d | 48 | |
8270a848 | 49 | (defcustom info-lookup-highlight-face 'match |
d2c2b883 RS |
50 | "Face for highlighting looked up help items. |
51 | Setting this variable to nil disables highlighting." | |
52 | :group 'info-lookup :type 'face) | |
5a79736d RS |
53 | |
54 | (defvar info-lookup-highlight-overlay nil | |
55 | "Overlay object used for highlighting.") | |
56 | ||
9d37318d | 57 | (defcustom info-lookup-file-name-alist |
28a2ca5d | 58 | '(("\\`ac\\(local\\|site\\|include\\)\\.m4\\'" . autoconf-mode)) |
9d37318d KH |
59 | "Alist of file names handled specially. |
60 | List elements are cons cells of the form | |
61 | ||
62 | (REGEXP . MODE) | |
63 | ||
64 | If a file name matches REGEXP, then use help mode MODE instead of the | |
65 | buffer's major mode." | |
66 | :group 'info-lookup :type '(repeat (cons (string :tag "Regexp") | |
67 | (symbol :tag "Mode")))) | |
68 | ||
5a79736d RS |
69 | (defvar info-lookup-history nil |
70 | "History of previous input lines.") | |
71 | ||
d2c2b883 RS |
72 | (defvar info-lookup-alist nil |
73 | "Alist of known help topics. | |
5a79736d RS |
74 | Cons cells are of the form |
75 | ||
d2c2b883 | 76 | (HELP-TOPIC . HELP-DATA) |
5a79736d RS |
77 | |
78 | HELP-TOPIC is the symbol of a help topic. | |
d2c2b883 | 79 | HELP-DATA is a HELP-TOPIC's public data set. |
5a79736d RS |
80 | Value is an alist with elements of the form |
81 | ||
82 | (HELP-MODE REGEXP IGNORE-CASE DOC-SPEC PARSE-RULE OTHER-MODES) | |
83 | ||
84 | HELP-MODE is a mode's symbol. | |
85 | REGEXP is a regular expression matching those help items whose | |
86 | documentation can be looked up via DOC-SPEC. | |
87 | IGNORE-CASE is non-nil if help items are case insensitive. | |
88 | DOC-SPEC is a list of documentation specifications of the form | |
89 | ||
90 | (INFO-NODE TRANS-FUNC PREFIX SUFFIX) | |
91 | ||
92 | INFO-NODE is the name (including file name part) of an Info index. | |
93 | TRANS-FUNC is a function translating index entries into help items; | |
94 | nil means add only those index entries matching REGEXP, a string | |
95 | means prepend string to the first word of all index entries. | |
96 | PREFIX and SUFFIX are parts of a regular expression. If one of | |
97 | them is non-nil then search the help item's Info node for the | |
98 | first occurrence of the regular expression `PREFIX ITEM SUFFIX'. | |
99 | ITEM will be highlighted with `info-lookup-highlight-face' if this | |
100 | variable is not nil. | |
101 | PARSE-RULE is either the symbol name of a function or a regular | |
102 | expression for guessing the default help item at point. Fuzzy | |
103 | regular expressions like \"[_a-zA-Z0-9]+\" do a better job if | |
104 | there are no clear delimiters; do not try to write too complex | |
105 | expressions. PARSE-RULE defaults to REGEXP. | |
106 | OTHER-MODES is a list of cross references to other help modes.") | |
107 | ||
108 | (defsubst info-lookup->topic-value (topic) | |
d2c2b883 | 109 | (cdr (assoc topic info-lookup-alist))) |
5a79736d RS |
110 | |
111 | (defsubst info-lookup->mode-value (topic mode) | |
112 | (assoc mode (info-lookup->topic-value topic))) | |
113 | ||
114 | (defsubst info-lookup->regexp (topic mode) | |
115 | (nth 1 (info-lookup->mode-value topic mode))) | |
116 | ||
117 | (defsubst info-lookup->ignore-case (topic mode) | |
118 | (nth 2 (info-lookup->mode-value topic mode))) | |
119 | ||
120 | (defsubst info-lookup->doc-spec (topic mode) | |
121 | (nth 3 (info-lookup->mode-value topic mode))) | |
122 | ||
123 | (defsubst info-lookup->parse-rule (topic mode) | |
124 | (nth 4 (info-lookup->mode-value topic mode))) | |
125 | ||
126 | (defsubst info-lookup->other-modes (topic mode) | |
127 | (nth 5 (info-lookup->mode-value topic mode))) | |
128 | ||
d2c2b883 RS |
129 | (defun info-lookup-add-help (&rest arg) |
130 | "Add or update a help specification. | |
131 | Function arguments are one or more options of the form | |
132 | ||
133 | KEYWORD ARGUMENT | |
134 | ||
135 | KEYWORD is either `:topic', `:mode', `:regexp', `:ignore-case', | |
136 | `:doc-spec', `:parse-rule', or `:other-modes'. | |
137 | ARGUMENT has a value as explained in the documentation of the | |
138 | variable `info-lookup-alist'. | |
139 | ||
140 | If no topic or mode option has been specified, then the help topic defaults | |
141 | to `symbol', and the help mode defaults to the current major mode." | |
142 | (apply 'info-lookup-add-help* nil arg)) | |
143 | ||
144 | (defun info-lookup-maybe-add-help (&rest arg) | |
4837b516 | 145 | "Add a help specification if none is defined. |
d2c2b883 RS |
146 | See the documentation of the function `info-lookup-add-help' |
147 | for more details." | |
148 | (apply 'info-lookup-add-help* t arg)) | |
149 | ||
150 | (defun info-lookup-add-help* (maybe &rest arg) | |
151 | (let (topic mode regexp ignore-case doc-spec | |
152 | parse-rule other-modes keyword value) | |
153 | (setq topic 'symbol | |
154 | mode major-mode | |
155 | regexp "\\w+") | |
156 | (while arg | |
157 | (setq keyword (car arg)) | |
158 | (or (symbolp keyword) | |
159 | (error "Junk in argument list \"%S\"" arg)) | |
160 | (setq arg (cdr arg)) | |
161 | (and (null arg) | |
162 | (error "Keyword \"%S\" is missing an argument" keyword)) | |
163 | (setq value (car arg) | |
164 | arg (cdr arg)) | |
165 | (cond ((eq keyword :topic) | |
166 | (setq topic value)) | |
167 | ((eq keyword :mode) | |
168 | (setq mode value)) | |
169 | ((eq keyword :regexp) | |
170 | (setq regexp value)) | |
171 | ((eq keyword :ignore-case) | |
172 | (setq ignore-case value)) | |
173 | ((eq keyword :doc-spec) | |
174 | (setq doc-spec value)) | |
175 | ((eq keyword :parse-rule) | |
176 | (setq parse-rule value)) | |
177 | ((eq keyword :other-modes) | |
178 | (setq other-modes value)) | |
179 | (t | |
180 | (error "Unknown keyword \"%S\"" keyword)))) | |
181 | (or (and maybe (info-lookup->mode-value topic mode)) | |
182 | (let* ((data (list regexp ignore-case doc-spec parse-rule other-modes)) | |
183 | (topic-cell (or (assoc topic info-lookup-alist) | |
184 | (car (setq info-lookup-alist | |
185 | (cons (cons topic nil) | |
186 | info-lookup-alist))))) | |
187 | (mode-cell (assoc mode topic-cell))) | |
188 | (if (null mode-cell) | |
189 | (setcdr topic-cell (cons (cons mode data) (cdr topic-cell))) | |
190 | (setcdr mode-cell data)))) | |
191 | nil)) | |
192 | ||
5a79736d RS |
193 | (defvar info-lookup-cache nil |
194 | "Cache storing data maintained automatically by the program. | |
195 | Value is an alist with cons cell of the form | |
196 | ||
197 | (HELP-TOPIC . ((HELP-MODE INITIALIZED COMPLETIONS REFER-MODES) ...)) | |
198 | ||
199 | HELP-TOPIC is the symbol of a help topic. | |
200 | HELP-MODE is a mode's symbol. | |
201 | INITIALIZED is nil if HELP-MODE is uninitialized, t if | |
202 | HELP-MODE is initialized, and `0' means HELP-MODE is | |
203 | initialized but void. | |
204 | COMPLETIONS is an alist of documented help items. | |
205 | REFER-MODES is a list of other help modes to use.") | |
206 | ||
207 | (defsubst info-lookup->cache (topic) | |
208 | (or (assoc topic info-lookup-cache) | |
209 | (car (setq info-lookup-cache | |
210 | (cons (cons topic nil) | |
211 | info-lookup-cache))))) | |
212 | ||
0c10ee28 | 213 | (defun info-lookup->topic-cache (topic) |
5a79736d RS |
214 | (cdr (info-lookup->cache topic))) |
215 | ||
0c10ee28 | 216 | (defun info-lookup->mode-cache (topic mode) |
5a79736d RS |
217 | (assoc mode (info-lookup->topic-cache topic))) |
218 | ||
0c10ee28 | 219 | (defun info-lookup->initialized (topic mode) |
5a79736d RS |
220 | (nth 1 (info-lookup->mode-cache topic mode))) |
221 | ||
0c10ee28 | 222 | (defun info-lookup->completions (topic mode) |
5a79736d RS |
223 | (or (info-lookup->initialized topic mode) |
224 | (info-lookup-setup-mode topic mode)) | |
225 | (nth 2 (info-lookup->mode-cache topic mode))) | |
226 | ||
0c10ee28 | 227 | (defun info-lookup->refer-modes (topic mode) |
5a79736d RS |
228 | (or (info-lookup->initialized topic mode) |
229 | (info-lookup-setup-mode topic mode)) | |
230 | (nth 3 (info-lookup->mode-cache topic mode))) | |
231 | ||
0c10ee28 | 232 | (defun info-lookup->all-modes (topic mode) |
5a79736d RS |
233 | (cons mode (info-lookup->refer-modes topic mode))) |
234 | ||
0c10ee28 RS |
235 | (defun info-lookup-quick-all-modes (topic mode) |
236 | (cons mode (info-lookup->other-modes topic mode))) | |
237 | ||
5a79736d RS |
238 | ;;;###autoload |
239 | (defun info-lookup-reset () | |
240 | "Throw away all cached data. | |
241 | This command is useful if the user wants to start at the beginning without | |
242 | quitting Emacs, for example, after some Info documents were updated on the | |
243 | system." | |
244 | (interactive) | |
245 | (setq info-lookup-cache nil)) | |
246 | ||
99400b3e | 247 | ;;;###autoload (put 'info-lookup-symbol 'info-file "emacs") |
5a79736d RS |
248 | ;;;###autoload |
249 | (defun info-lookup-symbol (symbol &optional mode) | |
3481a5c0 | 250 | "Display the definition of SYMBOL, as found in the relevant manual. |
ec4ef174 EZ |
251 | When this command is called interactively, it reads SYMBOL from the |
252 | minibuffer. In the minibuffer, use M-n to yank the default argument | |
253 | value into the minibuffer so you can edit it. The default symbol is the | |
254 | one found at point. | |
b108eac2 KH |
255 | |
256 | With prefix arg a query for the symbol help mode is offered." | |
5a79736d | 257 | (interactive |
b108eac2 | 258 | (info-lookup-interactive-arguments 'symbol current-prefix-arg)) |
5a79736d RS |
259 | (info-lookup 'symbol symbol mode)) |
260 | ||
99400b3e | 261 | ;;;###autoload (put 'info-lookup-file 'info-file "emacs") |
5a79736d RS |
262 | ;;;###autoload |
263 | (defun info-lookup-file (file &optional mode) | |
264 | "Display the documentation of a file. | |
3481a5c0 KH |
265 | When this command is called interactively, it reads FILE from the minibuffer. |
266 | In the minibuffer, use M-n to yank the default file name | |
267 | into the minibuffer so you can edit it. | |
b108eac2 KH |
268 | The default file name is the one found at point. |
269 | ||
270 | With prefix arg a query for the file help mode is offered." | |
5a79736d | 271 | (interactive |
b108eac2 | 272 | (info-lookup-interactive-arguments 'file current-prefix-arg)) |
5a79736d RS |
273 | (info-lookup 'file file mode)) |
274 | ||
b108eac2 KH |
275 | (defun info-lookup-interactive-arguments (topic &optional query) |
276 | "Read and return argument value (and help mode) for help topic TOPIC. | |
277 | If optional argument QUERY is non-nil, query for the help mode." | |
278 | (let* ((mode (cond (query | |
279 | (info-lookup-change-mode topic)) | |
280 | ((info-lookup->mode-value topic (info-lookup-select-mode)) | |
281 | info-lookup-mode) | |
282 | ((info-lookup-change-mode topic)))) | |
5a79736d RS |
283 | (completions (info-lookup->completions topic mode)) |
284 | (default (info-lookup-guess-default topic mode)) | |
5a79736d RS |
285 | (completion-ignore-case (info-lookup->ignore-case topic mode)) |
286 | (enable-recursive-minibuffers t) | |
287 | (value (completing-read | |
3481a5c0 | 288 | (if default |
5a79736d RS |
289 | (format "Describe %s (default %s): " topic default) |
290 | (format "Describe %s: " topic)) | |
3481a5c0 | 291 | completions nil nil nil 'info-lookup-history default))) |
5a79736d RS |
292 | (list (if (equal value "") default value) mode))) |
293 | ||
9d37318d KH |
294 | (defun info-lookup-select-mode () |
295 | (when (and (not info-lookup-mode) (buffer-file-name)) | |
296 | (let ((file-name (file-name-nondirectory (buffer-file-name))) | |
297 | (file-name-alist info-lookup-file-name-alist)) | |
298 | (while (and (not info-lookup-mode) file-name-alist) | |
299 | (when (string-match (caar file-name-alist) file-name) | |
300 | (setq info-lookup-mode (cdar file-name-alist))) | |
301 | (setq file-name-alist (cdr file-name-alist))))) | |
302 | (or info-lookup-mode (setq info-lookup-mode major-mode))) | |
303 | ||
5a79736d RS |
304 | (defun info-lookup-change-mode (topic) |
305 | (let* ((completions (mapcar (lambda (arg) | |
306 | (cons (symbol-name (car arg)) (car arg))) | |
307 | (info-lookup->topic-value topic))) | |
308 | (mode (completing-read | |
309 | (format "Use %s help mode: " topic) | |
310 | completions nil t nil 'info-lookup-history))) | |
311 | (or (setq mode (cdr (assoc mode completions))) | |
312 | (error "No %s help available" topic)) | |
313 | (or (info-lookup->mode-value topic mode) | |
314 | (error "No %s help available for `%s'" topic mode)) | |
315 | (setq info-lookup-mode mode))) | |
316 | ||
317 | (defun info-lookup (topic item mode) | |
318 | "Display the documentation of a help item." | |
9d37318d | 319 | (or mode (setq mode (info-lookup-select-mode))) |
5a79736d RS |
320 | (or (info-lookup->mode-value topic mode) |
321 | (error "No %s help available for `%s'" topic mode)) | |
7c3da01b RS |
322 | (let* ((completions (info-lookup->completions topic mode)) |
323 | (ignore-case (info-lookup->ignore-case topic mode)) | |
324 | (entry (or (assoc (if ignore-case (downcase item) item) completions) | |
0445150c | 325 | (assoc-string item completions t) |
7c3da01b RS |
326 | (error "Not documented as a %s: %s" topic (or item "")))) |
327 | (modes (info-lookup->all-modes topic mode)) | |
328 | (window (selected-window)) | |
27b1b62b MR |
329 | (new-Info-history |
330 | ;; Avoid clobbering Info-history with nodes searched during | |
331 | ;; lookup. If lookup succeeds set `Info-history' to | |
332 | ;; `new-Info-history'. | |
333 | (when (get-buffer "*info*") | |
334 | (with-current-buffer "*info*" | |
335 | (cons (list Info-current-file Info-current-node (point)) | |
336 | Info-history)))) | |
7c3da01b | 337 | found doc-spec node prefix suffix doc-found) |
947faf4f JL |
338 | (if (not (eq major-mode 'Info-mode)) |
339 | (if (not info-lookup-other-window-flag) | |
340 | (info) | |
341 | (progn | |
342 | (save-window-excursion (info)) | |
343 | ;; Determine whether or not the Info buffer is visible in | |
344 | ;; another frame on the same display. If it is, simply raise | |
345 | ;; that frame. Otherwise, display it in another window. | |
346 | (let* ((window (get-buffer-window "*info*" t)) | |
347 | (info-frame (and window (window-frame window)))) | |
348 | (if (and info-frame | |
349 | (display-multi-frame-p) | |
350 | (memq info-frame (frames-on-display-list)) | |
351 | (not (eq info-frame (selected-frame)))) | |
352 | (select-frame info-frame) | |
353 | (switch-to-buffer-other-window "*info*")))))) | |
5a79736d RS |
354 | (while (and (not found) modes) |
355 | (setq doc-spec (info-lookup->doc-spec topic (car modes))) | |
356 | (while (and (not found) doc-spec) | |
357 | (setq node (nth 0 (car doc-spec)) | |
358 | prefix (nth 2 (car doc-spec)) | |
359 | suffix (nth 3 (car doc-spec))) | |
1d010333 | 360 | (when (condition-case error-data |
e35ccb9e | 361 | (progn |
e8d2103a EZ |
362 | ;; Don't need Index menu fontifications here, and |
363 | ;; they slow down the lookup. | |
27b1b62b MR |
364 | (let (Info-fontify-maximum-menu-size |
365 | Info-history-list) | |
e8d2103a EZ |
366 | (Info-goto-node node) |
367 | (setq doc-found t))) | |
e35ccb9e | 368 | (error |
1d010333 RS |
369 | (message "Cannot access Info node %s" node) |
370 | (sit-for 1) | |
371 | nil)) | |
372 | (condition-case nil | |
373 | (progn | |
7c3da01b RS |
374 | ;; Don't use Info-menu, it forces case-fold-search to t |
375 | (let ((case-fold-search nil)) | |
376 | (re-search-forward | |
377 | (concat "^\\* " (regexp-quote (or (cdr entry) (car entry))) | |
378 | ":"))) | |
379 | (Info-follow-nearest-node) | |
1d010333 RS |
380 | (setq found t) |
381 | (if (or prefix suffix) | |
382 | (let ((case-fold-search | |
383 | (info-lookup->ignore-case topic (car modes))) | |
384 | (buffer-read-only nil)) | |
385 | (goto-char (point-min)) | |
386 | (re-search-forward | |
7c3da01b | 387 | (concat prefix (regexp-quote (car entry)) suffix)) |
1d010333 | 388 | (goto-char (match-beginning 0)) |
141d2f67 | 389 | (and (display-color-p) info-lookup-highlight-face |
1d010333 | 390 | ;; Search again for ITEM so that the first |
a5a08b1f | 391 | ;; occurrence of ITEM will be highlighted. |
7c3da01b | 392 | (re-search-forward (regexp-quote (car entry))) |
1d010333 RS |
393 | (let ((start (match-beginning 0)) |
394 | (end (match-end 0))) | |
395 | (if (overlayp info-lookup-highlight-overlay) | |
396 | (move-overlay info-lookup-highlight-overlay | |
397 | start end (current-buffer)) | |
398 | (setq info-lookup-highlight-overlay | |
399 | (make-overlay start end)))) | |
400 | (overlay-put info-lookup-highlight-overlay | |
401 | 'face info-lookup-highlight-face))))) | |
402 | (error nil))) | |
5a79736d RS |
403 | (setq doc-spec (cdr doc-spec))) |
404 | (setq modes (cdr modes))) | |
7c3da01b RS |
405 | ;; Alert the user if case was munged, and do this after bringing up the |
406 | ;; info buffer since that can print messages | |
407 | (unless (or ignore-case | |
408 | (string-equal item (car entry))) | |
021c54a3 | 409 | (message "Found in different case: %s" (car entry))) |
27b1b62b MR |
410 | (when found |
411 | (setq Info-history new-Info-history)) | |
1d010333 RS |
412 | (or doc-found |
413 | (error "Info documentation for lookup was not found")) | |
5a79736d RS |
414 | ;; Don't leave the Info buffer if the help item couldn't be looked up. |
415 | (if (and info-lookup-other-window-flag found) | |
416 | (select-window window)))) | |
417 | ||
418 | (defun info-lookup-setup-mode (topic mode) | |
419 | "Initialize the internal data structure." | |
420 | (or (info-lookup->initialized topic mode) | |
27b1b62b MR |
421 | (let ((initialized 0) |
422 | cell data completions refer-modes Info-history-list) | |
5a79736d RS |
423 | (if (not (info-lookup->mode-value topic mode)) |
424 | (message "No %s help available for `%s'" topic mode) | |
425 | ;; Recursively setup cross references. | |
426 | ;; But refer only to non-void modes. | |
538996c7 SM |
427 | (dolist (arg (info-lookup->other-modes topic mode)) |
428 | (or (info-lookup->initialized topic arg) | |
429 | (info-lookup-setup-mode topic arg)) | |
430 | (and (eq (info-lookup->initialized topic arg) t) | |
431 | (setq refer-modes (cons arg refer-modes)))) | |
5a79736d RS |
432 | (setq refer-modes (nreverse refer-modes)) |
433 | ;; Build the full completion alist. | |
434 | (setq completions | |
e12fcc41 KH |
435 | (nconc (condition-case nil |
436 | (info-lookup-make-completions topic mode) | |
437 | (error nil)) | |
5a79736d RS |
438 | (apply 'append |
439 | (mapcar (lambda (arg) | |
440 | (info-lookup->completions topic arg)) | |
441 | refer-modes)))) | |
442 | (setq initialized t)) | |
443 | ;; Update `info-lookup-cache'. | |
444 | (setq cell (info-lookup->mode-cache topic mode) | |
445 | data (list initialized completions refer-modes)) | |
446 | (if (not cell) | |
447 | (setcdr (info-lookup->cache topic) | |
448 | (cons (cons mode data) (info-lookup->topic-cache topic))) | |
449 | (setcdr cell data)) | |
450 | initialized))) | |
451 | ||
452 | (defun info-lookup-make-completions (topic mode) | |
453 | "Create a unique alist from all index entries." | |
1eff0ba1 RS |
454 | (let ((doc-spec (info-lookup->doc-spec topic mode)) |
455 | (regexp (concat "^\\(" (info-lookup->regexp topic mode) | |
456 | "\\)\\([ \t].*\\)?$")) | |
27b1b62b | 457 | Info-history-list Info-fontify-maximum-menu-size |
1d010333 | 458 | node trans entry item prefix result doc-found |
1eff0ba1 RS |
459 | (buffer (get-buffer-create " temp-info-look"))) |
460 | (with-current-buffer buffer | |
461 | (Info-mode)) | |
462 | (while doc-spec | |
463 | (setq node (nth 0 (car doc-spec)) | |
464 | trans (cond ((eq (nth 1 (car doc-spec)) nil) | |
465 | (lambda (arg) | |
466 | (if (string-match regexp arg) | |
467 | (match-string 1 arg)))) | |
468 | ((stringp (nth 1 (car doc-spec))) | |
469 | (setq prefix (nth 1 (car doc-spec))) | |
470 | (lambda (arg) | |
471 | (if (string-match "^\\([^: \t\n]+\\)" arg) | |
472 | (concat prefix (match-string 1 arg))))) | |
473 | (t (nth 1 (car doc-spec))))) | |
1d010333 RS |
474 | (with-current-buffer buffer |
475 | (message "Processing Info node `%s'..." node) | |
476 | (when (condition-case error-data | |
e35ccb9e | 477 | (progn |
1d010333 RS |
478 | (Info-goto-node node) |
479 | (setq doc-found t)) | |
e35ccb9e | 480 | (error |
1d010333 RS |
481 | (message "Cannot access Info node `%s'" node) |
482 | (sit-for 1) | |
483 | nil)) | |
484 | (condition-case nil | |
485 | (progn | |
486 | (goto-char (point-min)) | |
487 | (and (search-forward "\n* Menu:" nil t) | |
bdb0f2d5 | 488 | (while (re-search-forward "\n\\* \\(.*\\): " nil t) |
1d010333 RS |
489 | (setq entry (match-string 1) |
490 | item (funcall trans entry)) | |
6480a693 DL |
491 | ;; `trans' can return nil if the regexp doesn't match. |
492 | (when (and item | |
493 | ;; Sometimes there's more than one Menu: | |
e35ccb9e | 494 | (not (string= entry "Menu"))) |
6480a693 DL |
495 | (and (info-lookup->ignore-case topic mode) |
496 | (setq item (downcase item))) | |
497 | (and (string-equal entry item) | |
498 | (setq entry nil)) | |
499 | (and (or (assoc item result) | |
500 | (setq result (cons (cons item entry) | |
501 | result)))))))) | |
1d010333 | 502 | (error nil)))) |
1eff0ba1 RS |
503 | (message "Processing Info node `%s'...done" node) |
504 | (setq doc-spec (cdr doc-spec))) | |
1d010333 RS |
505 | (or doc-found |
506 | (error "Info documentation for lookup was not found")) | |
1eff0ba1 | 507 | result)) |
5a79736d RS |
508 | |
509 | (defun info-lookup-guess-default (topic mode) | |
ce288cb6 KH |
510 | "Return a guess for a symbol to look up, based on text around point. |
511 | Try all related modes applicable to TOPIC and MODE. | |
512 | Return nil if there is nothing appropriate in the buffer near point." | |
5a79736d | 513 | (let ((modes (info-lookup->all-modes topic mode)) |
ce288cb6 | 514 | guess) |
5a79736d RS |
515 | (while (and (not guess) modes) |
516 | (setq guess (info-lookup-guess-default* topic (car modes)) | |
ce288cb6 | 517 | modes (cdr modes))) |
5a79736d | 518 | ;; Collapse whitespace characters. |
ce288cb6 KH |
519 | (when guess |
520 | (let ((pos 0)) | |
521 | (while (string-match "[ \t\n]+" guess pos) | |
522 | (setq pos (1+ (match-beginning 0))) | |
523 | (setq guess (replace-match " " t t guess))))) | |
524 | guess)) | |
5a79736d RS |
525 | |
526 | (defun info-lookup-guess-default* (topic mode) | |
527 | (let ((case-fold-search (info-lookup->ignore-case topic mode)) | |
528 | (rule (or (info-lookup->parse-rule topic mode) | |
529 | (info-lookup->regexp topic mode))) | |
530 | (start (point)) end regexp subexp result) | |
ce288cb6 KH |
531 | (save-excursion |
532 | (if (symbolp rule) | |
533 | (setq result (funcall rule)) | |
534 | (if (consp rule) | |
535 | (setq regexp (car rule) | |
536 | subexp (cdr rule)) | |
537 | (setq regexp rule | |
538 | subexp 0)) | |
e35ccb9e DL |
539 | ;; If at start of symbol, don't go back to end of previous one. |
540 | (if (save-match-data | |
541 | (looking-at "[ \t\n]")) | |
542 | (skip-chars-backward " \t\n")) | |
543 | (setq end (point)) | |
ce288cb6 KH |
544 | (while (and (re-search-backward regexp nil t) |
545 | (looking-at regexp) | |
546 | (>= (match-end 0) end)) | |
547 | (setq result (match-string subexp))) | |
548 | (if (not result) | |
549 | (progn | |
550 | (goto-char start) | |
551 | (skip-chars-forward " \t\n") | |
552 | (and (looking-at regexp) | |
553 | (setq result (match-string subexp))))))) | |
5a79736d RS |
554 | result)) |
555 | ||
556 | (defun info-lookup-guess-c-symbol () | |
557 | "Get the C symbol at point." | |
558 | (condition-case nil | |
559 | (progn | |
ce288cb6 | 560 | (skip-syntax-backward "w_") |
5a79736d RS |
561 | (let ((start (point)) prefix name) |
562 | ;; Test for a leading `struct', `union', or `enum' keyword | |
563 | ;; but ignore names like `foo_struct'. | |
564 | (setq prefix (and (< (skip-chars-backward " \t\n") 0) | |
565 | (< (skip-chars-backward "_a-zA-Z0-9") 0) | |
566 | (looking-at "\\(struct\\|union\\|enum\\)\\s ") | |
567 | (concat (match-string 1) " "))) | |
568 | (goto-char start) | |
569 | (and (looking-at "[_a-zA-Z][_a-zA-Z0-9]*") | |
570 | (setq name (match-string 0))) | |
571 | ;; Caveat! Look forward if point is at `struct' etc. | |
572 | (and (not prefix) | |
573 | (or (string-equal name "struct") | |
574 | (string-equal name "union") | |
575 | (string-equal name "enum")) | |
576 | (looking-at "[a-z]+\\s +\\([_a-zA-Z][_a-zA-Z0-9]*\\)") | |
577 | (setq prefix (concat name " ") | |
578 | name (match-string 1))) | |
579 | (and (or prefix name) | |
580 | (concat prefix name)))) | |
581 | (error nil))) | |
582 | ||
ec4ef174 EZ |
583 | (defun info-lookup-guess-custom-symbol () |
584 | "Get symbol at point in custom buffers." | |
585 | (condition-case nil | |
586 | (save-excursion | |
587 | (let ((case-fold-search t) | |
588 | (ignored-chars "][()`',:.\" \t\n") | |
589 | (significant-chars "^][()`',:.\" \t\n") | |
590 | beg end) | |
591 | (cond | |
592 | ((and (memq (get-char-property (point) 'face) | |
593 | '(custom-variable-tag custom-variable-tag-face)) | |
594 | (setq beg (previous-single-char-property-change | |
595 | (point) 'face nil (line-beginning-position))) | |
596 | (setq end (next-single-char-property-change | |
597 | (point) 'face nil (line-end-position))) | |
598 | (> end beg)) | |
599 | (subst-char-in-string | |
4789a3cb | 600 | ?\s ?\- (buffer-substring-no-properties beg end))) |
ec4ef174 EZ |
601 | ((or (and (looking-at (concat "[" significant-chars "]")) |
602 | (save-excursion | |
603 | (skip-chars-backward significant-chars) | |
604 | (setq beg (point))) | |
605 | (skip-chars-forward significant-chars) | |
606 | (setq end (point)) | |
607 | (> end beg)) | |
608 | (and (looking-at "[ \t\n]") | |
609 | (looking-back (concat "[" significant-chars "]")) | |
610 | (setq end (point)) | |
611 | (skip-chars-backward significant-chars) | |
612 | (setq beg (point)) | |
613 | (> end beg)) | |
614 | (and (skip-chars-forward ignored-chars) | |
615 | (setq beg (point)) | |
616 | (skip-chars-forward significant-chars) | |
617 | (setq end (point)) | |
618 | (> end beg))) | |
619 | (buffer-substring-no-properties beg end))))) | |
620 | (error nil))) | |
621 | ||
5a79736d RS |
622 | ;;;###autoload |
623 | (defun info-complete-symbol (&optional mode) | |
624 | "Perform completion on symbol preceding point." | |
82fb111c RS |
625 | (interactive) |
626 | (info-complete 'symbol | |
627 | (or mode | |
628 | (if (info-lookup->mode-value | |
9d37318d KH |
629 | 'symbol (info-lookup-select-mode)) |
630 | info-lookup-mode | |
82fb111c | 631 | (info-lookup-change-mode 'symbol))))) |
5a79736d RS |
632 | |
633 | ;;;###autoload | |
634 | (defun info-complete-file (&optional mode) | |
635 | "Perform completion on file preceding point." | |
a1fee1bc KH |
636 | (interactive) |
637 | (info-complete 'file | |
638 | (or mode | |
639 | (if (info-lookup->mode-value | |
9d37318d KH |
640 | 'file (info-lookup-select-mode)) |
641 | info-lookup-mode | |
a1fee1bc | 642 | (info-lookup-change-mode 'file))))) |
5a79736d RS |
643 | |
644 | (defun info-complete (topic mode) | |
645 | "Try to complete a help item." | |
646 | (barf-if-buffer-read-only) | |
9d37318d | 647 | (or mode (setq mode (info-lookup-select-mode))) |
5a79736d RS |
648 | (or (info-lookup->mode-value topic mode) |
649 | (error "No %s completion available for `%s'" topic mode)) | |
0c10ee28 RS |
650 | (let ((modes (info-lookup-quick-all-modes topic mode)) |
651 | (start (point)) | |
652 | try) | |
5a79736d RS |
653 | (while (and (not try) modes) |
654 | (setq mode (car modes) | |
655 | modes (cdr modes) | |
656 | try (info-lookup-guess-default* topic mode)) | |
657 | (goto-char start)) | |
658 | (and (not try) | |
d2c2b883 | 659 | (error "Found no %S to complete" topic)) |
0c10ee28 RS |
660 | (let ((completions (info-lookup->completions topic mode)) |
661 | (completion-ignore-case (info-lookup->ignore-case topic mode)) | |
662 | completion) | |
663 | (setq completion (try-completion try completions)) | |
664 | (cond ((not completion) | |
665 | (ding) | |
666 | (message "No match")) | |
667 | ((stringp completion) | |
668 | (or (assoc completion completions) | |
669 | (setq completion (completing-read | |
670 | (format "Complete %S: " topic) | |
671 | completions nil t completion | |
672 | info-lookup-history))) | |
e35ccb9e DL |
673 | ;; Find the original symbol and zap it. |
674 | (end-of-line) | |
675 | (while (and (search-backward try nil t) | |
676 | (< start (point)))) | |
677 | (replace-match "") | |
0c10ee28 RS |
678 | (insert completion)) |
679 | (t | |
680 | (message "%s is complete" | |
681 | (capitalize (prin1-to-string topic)))))))) | |
d2c2b883 RS |
682 | |
683 | \f | |
d2c2b883 RS |
684 | ;;; Initialize some common modes. |
685 | ||
686 | (info-lookup-maybe-add-help | |
687 | :mode 'c-mode :topic 'symbol | |
688 | :regexp "\\(struct \\|union \\|enum \\)?[_a-zA-Z][_a-zA-Z0-9]*" | |
689 | :doc-spec '(("(libc)Function Index" nil | |
947faf4f | 690 | "^[ \t]+-+ \\(Function\\|Macro\\): .*\\<" "\\>") |
3b90e932 EZ |
691 | ;; prefix/suffix has to match things like |
692 | ;; " -- Macro: int F_DUPFD" | |
693 | ;; " -- Variable: char * tzname [2]" | |
694 | ;; "`DBL_MAX'" (texinfo @table) | |
695 | ;; suffix "\\>" is not used because that sends DBL_MAX to | |
696 | ;; DBL_MAX_EXP ("_" is a non-word char) | |
d2c2b883 | 697 | ("(libc)Variable Index" nil |
3b90e932 EZ |
698 | "^\\([ \t]+-+ \\(Variable\\|Macro\\): .*\\<\\|`\\)" |
699 | "\\( \\|'?$\\)") | |
d2c2b883 | 700 | ("(libc)Type Index" nil |
947faf4f | 701 | "^[ \t]+-+ Data Type: \\<" "\\>") |
d2c2b883 RS |
702 | ("(termcap)Var Index" nil |
703 | "^[ \t]*`" "'")) | |
704 | :parse-rule 'info-lookup-guess-c-symbol) | |
705 | ||
706 | (info-lookup-maybe-add-help | |
707 | :mode 'c-mode :topic 'file | |
708 | :regexp "[_a-zA-Z0-9./+-]+" | |
709 | :doc-spec '(("(libc)File Index"))) | |
710 | ||
711 | (info-lookup-maybe-add-help | |
712 | :mode 'bison-mode | |
713 | :regexp "[:;|]\\|%\\([%{}]\\|[_a-z]+\\)\\|YY[_A-Z]+\\|yy[_a-z]+" | |
714 | :doc-spec '(("(bison)Index" nil | |
715 | "`" "'")) | |
716 | :parse-rule "[:;|]\\|%\\([%{}]\\|[_a-zA-Z][_a-zA-Z0-9]*\\)" | |
717 | :other-modes '(c-mode)) | |
718 | ||
719 | (info-lookup-maybe-add-help | |
720 | :mode 'makefile-mode | |
721 | :regexp "\\$[^({]\\|\\.[_A-Z]*\\|[_a-zA-Z][_a-zA-Z0-9-]*" | |
722 | :doc-spec '(("(make)Name Index" nil | |
fdba4ab4 SM |
723 | "^[ \t]*`" "'") |
724 | ("(automake)Macro and Variable Index" nil | |
d2c2b883 | 725 | "^[ \t]*`" "'")) |
fdba4ab4 SM |
726 | :parse-rule "\\$[^({]\\|\\.[_A-Z]*\\|[_a-zA-Z0-9-]+" |
727 | :other-modes '(automake-mode)) | |
d2c2b883 RS |
728 | |
729 | (info-lookup-maybe-add-help | |
730 | :mode 'texinfo-mode | |
731 | :regexp "@\\([a-zA-Z]+\\|[^a-zA-Z]\\)" | |
732 | :doc-spec '(("(texinfo)Command and Variable Index" | |
733 | ;; Ignore Emacs commands and prepend a `@'. | |
734 | (lambda (item) | |
735 | (if (string-match "^\\([a-zA-Z]+\\|[^a-zA-Z]\\)\\( .*\\)?$" item) | |
736 | (concat "@" (match-string 1 item)))) | |
947faf4f | 737 | "`" "[' ]"))) |
d2c2b883 RS |
738 | |
739 | (info-lookup-maybe-add-help | |
740 | :mode 'm4-mode | |
741 | :regexp "[_a-zA-Z][_a-zA-Z0-9]*" | |
742 | :doc-spec '(("(m4)Macro index")) | |
743 | :parse-rule "[_a-zA-Z0-9]+") | |
744 | ||
745 | (info-lookup-maybe-add-help | |
746 | :mode 'autoconf-mode | |
747 | :regexp "A[CM]_[_A-Z0-9]+" | |
01e1a819 JB |
748 | :doc-spec '(;; Autoconf Macro Index entries are without an "AC_" prefix, |
749 | ;; but with "AH_" or "AU_" for those. So add "AC_" if there | |
750 | ;; isn't already an "A._". | |
751 | ("(autoconf)Autoconf Macro Index" | |
752 | (lambda (item) | |
753 | (if (string-match "^A._" item) item (concat "AC_" item))) | |
947faf4f | 754 | "^[ \t]+-+ \\(Macro\\|Variable\\): .*\\<" "\\>") |
01e1a819 JB |
755 | ;; M4 Macro Index entries are without "AS_" prefixes, and |
756 | ;; mostly without "m4_" prefixes. "dnl" is an exception, not | |
757 | ;; wanting any prefix. So AS_ is added back to upper-case | |
758 | ;; names, m4_ to others which don't already an m4_. | |
759 | ("(autoconf)M4 Macro Index" | |
760 | (lambda (item) | |
761 | (let ((case-fold-search nil)) | |
762 | (cond ((or (string-equal item "dnl") | |
763 | (string-match "^m4_" item)) | |
764 | item) | |
765 | ((string-match "^[A-Z0-9_]+$" item) | |
766 | (concat "AS_" item)) | |
767 | (t | |
768 | (concat "m4_" item))))) | |
947faf4f | 769 | "^[ \t]+-+ Macro: .*\\<" "\\>") |
01e1a819 JB |
770 | ;; Autotest Macro Index entries are without "AT_". |
771 | ("(autoconf)Autotest Macro Index" "AT_" | |
947faf4f | 772 | "^[ \t]+-+ Macro: .*\\<" "\\>") |
01e1a819 | 773 | ;; This is for older versions (probably pre autoconf 2.5x): |
28a2ca5d | 774 | ("(autoconf)Macro Index" "AC_" |
947faf4f | 775 | "^[ \t]+-+ \\(Macro\\|Variable\\): .*\\<" "\\>") |
01e1a819 JB |
776 | ;; Automake has index entries for its notes on various autoconf |
777 | ;; macros (eg. AC_PROG_CC). Ensure this is after the autoconf | |
778 | ;; index, so as to prefer the autoconf docs. | |
fdba4ab4 | 779 | ("(automake)Macro and Variable Index" nil |
d2c2b883 RS |
780 | "^[ \t]*`" "'")) |
781 | ;; Autoconf symbols are M4 macros. Thus use M4's parser. | |
782 | :parse-rule 'ignore | |
783 | :other-modes '(m4-mode)) | |
784 | ||
785 | (info-lookup-maybe-add-help | |
786 | :mode 'awk-mode | |
787 | :regexp "[_a-zA-Z]+" | |
788 | :doc-spec '(("(gawk)Index" | |
789 | (lambda (item) | |
790 | (let ((case-fold-search nil)) | |
791 | (cond | |
792 | ;; `BEGIN' and `END'. | |
793 | ((string-match "^\\([A-Z]+\\) special pattern\\b" item) | |
794 | (match-string 1 item)) | |
795 | ;; `if', `while', `do', ... | |
796 | ((string-match "^\\([a-z]+\\) statement\\b" item) | |
797 | (if (not (string-equal (match-string 1 item) "control")) | |
798 | (match-string 1 item))) | |
799 | ;; `NR', `NF', ... | |
800 | ((string-match "^[A-Z]+$" item) | |
801 | item) | |
802 | ;; Built-in functions (matches to many entries). | |
803 | ((string-match "^[a-z]+$" item) | |
804 | item)))) | |
805 | "`" "\\([ \t]*([^)]*)\\)?'"))) | |
806 | ||
807 | (info-lookup-maybe-add-help | |
808 | :mode 'perl-mode | |
809 | :regexp "[$@%][^a-zA-Z]\\|\\$\\^[A-Z]\\|[$@%]?[a-zA-Z][_a-zA-Z0-9]*" | |
810 | :doc-spec '(("(perl5)Function Index" | |
811 | (lambda (item) | |
812 | (if (string-match "^\\([a-zA-Z0-9]+\\)" item) | |
813 | (match-string 1 item))) | |
814 | "^" "\\b") | |
815 | ("(perl5)Variable Index" | |
816 | (lambda (item) | |
817 | ;; Work around bad formatted array variables. | |
818 | (let ((sym (cond ((or (string-match "^\\$\\(.\\|@@\\)$" item) | |
819 | (string-match "^\\$\\^[A-Z]$" item)) | |
820 | item) | |
821 | ((string-match | |
822 | "^\\([$%@]\\|@@\\)?[_a-zA-Z0-9]+" item) | |
823 | (match-string 0 item)) | |
824 | (t "")))) | |
825 | (if (string-match "@@" sym) | |
826 | (setq sym (concat (substring sym 0 (match-beginning 0)) | |
827 | (substring sym (1- (match-end 0)))))) | |
828 | (if (string-equal sym "") nil sym))) | |
829 | "^" "\\b")) | |
830 | :parse-rule "[$@%]?\\([_a-zA-Z0-9]+\\|[^a-zA-Z]\\)") | |
831 | ||
41b1cae7 SM |
832 | (info-lookup-maybe-add-help |
833 | :mode 'cperl-mode | |
834 | :regexp "[$@%][^a-zA-Z]\\|\\$\\^[A-Z]\\|[$@%]?[a-zA-Z][_a-zA-Z0-9]*" | |
835 | :other-modes '(perl-mode)) | |
836 | ||
d2c2b883 RS |
837 | (info-lookup-maybe-add-help |
838 | :mode 'latex-mode | |
839 | :regexp "\\\\\\([a-zA-Z]+\\|[^a-zA-Z]\\)" | |
e12fcc41 | 840 | :doc-spec '(("(latex)Command Index" nil |
d2c2b883 RS |
841 | "`" "\\({[^}]*}\\)?'"))) |
842 | ||
843 | (info-lookup-maybe-add-help | |
844 | :mode 'emacs-lisp-mode | |
ec4ef174 | 845 | :regexp "[^][()`',\" \t\n]+" |
16524b9b JB |
846 | :doc-spec '(;; Commands with key sequences appear in nodes as `foo' and |
847 | ;; those without as `M-x foo'. | |
848 | ("(emacs)Command Index" nil "`\\(M-x[ \t\n]+\\)?" "'") | |
849 | ;; Variables normally appear in nodes as just `foo'. | |
850 | ("(emacs)Variable Index" nil "`" "'") | |
851 | ;; Almost all functions, variables, etc appear in nodes as | |
947faf4f | 852 | ;; " -- Function: foo" etc. A small number of aliases and |
16524b9b JB |
853 | ;; symbols appear only as `foo', and will miss out on exact |
854 | ;; positions. Allowing `foo' would hit too many false matches | |
855 | ;; for things that should go to Function: etc, and those latter | |
856 | ;; are much more important. Perhaps this could change if some | |
857 | ;; sort of fallback match scheme existed. | |
947faf4f | 858 | ("(elisp)Index" nil "^ -+ .*: " "\\( \\|$\\)"))) |
d2c2b883 RS |
859 | |
860 | (info-lookup-maybe-add-help | |
861 | :mode 'lisp-interaction-mode | |
ec4ef174 | 862 | :regexp "[^][()`',\" \t\n]+" |
d2c2b883 RS |
863 | :parse-rule 'ignore |
864 | :other-modes '(emacs-lisp-mode)) | |
865 | ||
0c10ee28 RS |
866 | (info-lookup-maybe-add-help |
867 | :mode 'lisp-mode | |
ec4ef174 | 868 | :regexp "[^()`',\" \t\n]+" |
0c10ee28 RS |
869 | :parse-rule 'ignore |
870 | :other-modes '(emacs-lisp-mode)) | |
871 | ||
9d37318d KH |
872 | (info-lookup-maybe-add-help |
873 | :mode 'scheme-mode | |
08d87b2d | 874 | :regexp "[^()`',\" \t\n]+" |
9d37318d | 875 | :ignore-case t |
6480a693 | 876 | ;; Aubrey Jaffer's rendition from <URL:ftp://ftp-swiss.ai.mit.edu/pub/scm> |
9d37318d | 877 | :doc-spec '(("(r5rs)Index" nil |
947faf4f | 878 | "^[ \t]+-+ [^:]+:[ \t]*" "\\b"))) |
9d37318d | 879 | |
054e5c20 SE |
880 | (info-lookup-maybe-add-help |
881 | :mode 'octave-mode | |
5d8137ab | 882 | :regexp "[_a-zA-Z0-9]+\\|\\s.+\\|[-!=^|*/.\\,><~&+]\\{1,3\\}\\|[][();,\"']" |
c6bb2688 | 883 | :doc-spec '(("(octave)Function Index" nil |
947faf4f JL |
884 | "^ -+ [^:]+:[ ]+\\(\\[[^=]*=[ ]+\\)?" nil) |
885 | ("(octave)Variable Index" nil "^ -+ [^:]+:[ ]+" nil) | |
5d8137ab | 886 | ("(octave)Operator Index" nil nil nil) |
054e5c20 | 887 | ;; Catch lines of the form "xyz statement" |
e35ccb9e | 888 | ("(octave)Concept Index" |
054e5c20 SE |
889 | (lambda (item) |
890 | (cond | |
891 | ((string-match "^\\([A-Z]+\\) statement\\b" item) | |
892 | (match-string 1 item)) | |
893 | (t nil))) | |
947faf4f | 894 | nil; "^ -+ [^:]+:[ ]+" don't think this prefix is useful here. |
054e5c20 | 895 | nil))) |
c0e7fbb8 | 896 | |
b3a3e4e1 SE |
897 | (info-lookup-maybe-add-help |
898 | :mode 'maxima-mode | |
899 | :ignore-case t | |
c99240cc | 900 | :regexp "[a-zA-Z0-9_%]+" |
947faf4f JL |
901 | :doc-spec '( ("(maxima)Function and Variable Index" nil |
902 | "^ -+ [^:]+:[ ]+\\(\\[[^=]*=[ ]+\\)?" nil))) | |
b3a3e4e1 SE |
903 | |
904 | (info-lookup-maybe-add-help | |
905 | :mode 'inferior-maxima-mode | |
c99240cc | 906 | :regexp "[a-zA-Z0-9_%]+" |
b3a3e4e1 SE |
907 | :other-modes '(maxima-mode)) |
908 | ||
c0e7fbb8 | 909 | ;; coreutils and bash builtins overlap in places, eg. printf, so there's a |
c6bb2688 | 910 | ;; question which should come first. Some of the coreutils descriptions are |
c0e7fbb8 JB |
911 | ;; more detailed, but if bash is usually /bin/sh on a GNU system then the |
912 | ;; builtins will be what's normally run. | |
913 | ;; | |
914 | ;; Maybe special variables like $? should be matched as $?, not just ?. | |
915 | ;; This would avoid a clash between variable $! and negation !, or variable | |
916 | ;; $# and comment # (though comment # is not currently indexed in bash). | |
917 | ;; Unfortunately if $? etc is the symbol, then we wouldn't be taken to the | |
918 | ;; exact spot in the relevant node, since the bash manual has just `?' etc | |
919 | ;; there. Maybe an extension to the prefix/suffix scheme could help this. | |
920 | ||
921 | (info-lookup-maybe-add-help | |
922 | :mode 'sh-mode :topic 'symbol | |
923 | ;; bash has "." and ":" in its index, but those chars will probably never | |
924 | ;; work in info, so don't bother matching them in the regexp. | |
925 | :regexp "\\([a-zA-Z0-9_-]+\\|[!{}@*#?$]\\|\\[\\[?\\|]]?\\)" | |
926 | :doc-spec '(("(bash)Builtin Index" nil "^`" "[ .']") | |
927 | ("(bash)Reserved Word Index" nil "^`" "[ .']") | |
928 | ("(bash)Variable Index" nil "^`" "[ .']") | |
929 | ;; coreutils (version 4.5.10) doesn't have a separate program | |
930 | ;; index, so exclude extraneous stuff (most of it) by demanding | |
931 | ;; "[a-z]+" in the trans-func. | |
932 | ("(coreutils)Index" | |
933 | (lambda (item) (if (string-match "\\`[a-z]+\\'" item) item))) | |
934 | ;; diff (version 2.8.1) has only a few programs, index entries | |
935 | ;; are things like "foo invocation". | |
936 | ("(diff)Index" | |
937 | (lambda (item) | |
938 | (if (string-match "\\`\\([a-z]+\\) invocation\\'" item) | |
939 | (match-string 1 item)))) | |
940 | ;; there's no plain "sed" index entry as such, mung another | |
941 | ;; hopefully unique one to get to the invocation section | |
942 | ("(sed)Concept Index" | |
943 | (lambda (item) | |
944 | (if (string-equal item "Standard input, processing as input") | |
945 | "sed"))) | |
946 | ;; there's no plain "awk" or "gawk" index entries, mung other | |
947 | ;; hopefully unique ones to get to the command line options | |
948 | ("(gawk)Index" | |
949 | (lambda (item) | |
950 | (cond ((string-equal item "gawk, extensions, disabling") | |
951 | "awk") | |
952 | ((string-equal item "gawk, versions of, information about, printing") | |
953 | "gawk")))))) | |
538996c7 | 954 | |
7830c895 SM |
955 | ;; This misses some things which occur as node names but not in the |
956 | ;; index. Unfortunately it also picks up the wrong one of multiple | |
957 | ;; entries for the same term in some cases. --fx | |
538996c7 SM |
958 | (info-lookup-maybe-add-help |
959 | :mode 'cfengine-mode | |
1bc897ca | 960 | :regexp "[[:alnum:]_]+\\(?:()\\)?" |
7830c895 SM |
961 | :doc-spec '(("(cfengine-Reference)Variable Index" |
962 | (lambda (item) | |
963 | ;; Index entries may be like `IsPlain()' | |
964 | (if (string-match "\\([[:alnum:]_]+\\)()" item) | |
965 | (match-string 1 item) | |
966 | item)) | |
967 | ;; This gets functions in evaluated classes. Other | |
968 | ;; possible patterns don't seem to work too well. | |
969 | "`" "("))) | |
ec4ef174 EZ |
970 | |
971 | (info-lookup-maybe-add-help | |
e8b36335 | 972 | :mode 'Custom-mode |
ec4ef174 EZ |
973 | :ignore-case t |
974 | :regexp "[^][()`',:\" \t\n]+" | |
975 | :parse-rule 'info-lookup-guess-custom-symbol | |
976 | :other-modes '(emacs-lisp-mode)) | |
977 | ||
978 | (info-lookup-maybe-add-help | |
979 | :mode 'help-mode | |
980 | :regexp "[^][()`',:\" \t\n]+" | |
981 | :other-modes '(emacs-lisp-mode)) | |
d2c2b883 | 982 | \f |
5a79736d RS |
983 | (provide 'info-look) |
984 | ||
cbee283d | 985 | ;; arch-tag: 0f1e3ea3-32a2-4461-bbab-3cff93539a74 |
5a79736d | 986 | ;;; info-look.el ends here |