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e5167999 ER |
1 | ;; etags.el --- etags facility for Emacs |
2 | ||
3 | ;; Author: Roland McGrath <roland@gnu.ai.mit.edu> | |
4 | ;; Keywords: tools | |
5 | ||
9708f7fc RM |
6 | ;; Copyright (C) 1985, 1986, 1988, 1989, 1991, 1992 |
7 | ;; Free Software Foundation, Inc. | |
ff1f0fa6 JB |
8 | |
9 | ;; This file is part of GNU Emacs. | |
10 | ||
11 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
12 | ;; it under the terms of the GNU General Public License as published by | |
daa37602 | 13 | ;; the Free Software Foundation; either version 2, or (at your option) |
ff1f0fa6 JB |
14 | ;; any later version. |
15 | ||
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
22 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
23 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | ||
e5167999 ER |
25 | ;;; Code: |
26 | ||
c086701a JB |
27 | ;;;###autoload |
28 | (defvar tags-file-name nil "\ | |
9708f7fc RM |
29 | *File name of tags table. |
30 | To switch to a new tags table, setting this variable is sufficient. | |
31 | Use the `etags' program to make a tags table file.") | |
32 | ||
33 | ;;;###autoload | |
34 | (defvar tags-table-list nil | |
35 | "*List of names of tags table files which are currently being searched. | |
36 | An element of nil means to look for a file \"TAGS\" in the current directory. | |
37 | Use `visit-tags-table-buffer' to cycle through tags tables in this list.") | |
38 | ||
39 | (defvar tags-table-list-pointer nil | |
40 | "Pointer into `tags-table-list', or into a list of included tags tables, | |
41 | where the current state of searching is. Use `visit-tags-table-buffer' to | |
42 | cycle through tags tables in this list.") | |
43 | ||
44 | (defvar tags-table-parent-pointer-list nil | |
45 | "List of values to restore into `tags-table-list-pointer' when it hits nil.") | |
46 | ||
47 | (defvar tags-table-set-list nil | |
48 | "List of sets of tags table which have been used together in the past. | |
49 | Each element is a list of strings which are file names.") | |
50 | ||
51 | ;;;###autoload | |
52 | (defvar find-tag-hook nil | |
53 | "*Hook to be run by \\[find-tag] after finding a tag. See `run-hooks'. | |
54 | The value in the buffer in which \\[find-tag] is done is used, | |
55 | not the value in the buffer \\[find-tag] goes to.") | |
56 | ||
57 | ;;;###autoload | |
58 | (defvar find-tag-default-function nil | |
59 | "*If non-nil, a function of no arguments used by \\[find-tag] to pick a | |
60 | default tag. If nil, and the symbol that is the value of `major-mode' | |
61 | has a `find-tag-default-function' property (see `put'), that is used. | |
62 | Otherwise, `find-tag-default' is used.") | |
63 | ||
64 | ;;;###autoload | |
65 | (defvar default-tags-table-function nil | |
66 | "*If non-nil, a function of no arguments to choose a default tags file | |
67 | for a particular buffer.") | |
68 | \f | |
69 | ;; Tags table state. | |
70 | ;; These variables are local in tags table buffers. | |
ff1f0fa6 | 71 | |
9708f7fc RM |
72 | (defvar tag-lines-already-matched nil |
73 | "List of positions of beginnings of lines within the tags table | |
74 | that are already matched.") | |
ff1f0fa6 | 75 | |
9708f7fc RM |
76 | (defvar tags-table-files nil |
77 | "List of file names covered by current tags table. | |
78 | nil means it has not yet been computed; use `tags-table-files' to do so.") | |
79 | ||
80 | (defvar tags-completion-table nil | |
81 | "Alist of tag names defined in current tags table.") | |
82 | ||
83 | (defvar tags-included-tables nil | |
84 | "List of tags tables included by the current tags table.") | |
85 | ||
86 | (defvar next-file-list nil | |
87 | "List of files for \\[next-file] to process.") | |
88 | \f | |
89 | ;; Hooks for file formats. | |
90 | ||
91 | (defvar tags-table-format-hooks '(etags-recognize-tags-table | |
92 | recognize-empty-tags-table | |
9a50b93f | 93 | ctags-recognize-tags-table) |
9708f7fc RM |
94 | "List of functions to be called in a tags table buffer to identify |
95 | the type of tags table. The functions are called in order, with no arguments, | |
96 | until one returns non-nil. The function should make buffer-local bindings | |
97 | of the format-parsing tags function variables if successful.") | |
98 | ||
99 | (defvar file-of-tag-function nil | |
100 | "Function to do the work of `file-of-tag' (which see).") | |
101 | (defvar tags-table-files-function nil | |
102 | "Function to do the work of `tags-table-files' (which see).") | |
103 | (defvar tags-completion-table-function nil | |
104 | "Function to build the tags-completion-table.") | |
105 | (defvar snarf-tag-function nil | |
106 | "Function to get info about a matched tag for `goto-tag-location-function'.") | |
107 | (defvar goto-tag-location-function nil | |
108 | "Function of to go to the location in the buffer specified by a tag. | |
109 | One argument, the tag info returned by `snarf-tag-function'.") | |
110 | (defvar find-tag-regexp-search-function nil | |
111 | "Search function passed to `find-tag-in-order' for finding a regexp tag.") | |
112 | (defvar find-tag-regexp-tag-order nil | |
113 | "Tag order passed to `find-tag-in-order' for finding a regexp tag.") | |
114 | (defvar find-tag-regexp-next-line-after-failure-p nil | |
115 | "Flag passed to `find-tag-in-order' for finding a regexp tag.") | |
116 | (defvar find-tag-search-function nil | |
117 | "Search function passed to `find-tag-in-order' for finding a tag.") | |
118 | (defvar find-tag-tag-order nil | |
119 | "Tag order passed to `find-tag-in-order' for finding a tag.") | |
120 | (defvar find-tag-next-line-after-failure-p nil | |
121 | "Flag passed to `find-tag-in-order' for finding a tag.") | |
122 | (defvar list-tags-function nil | |
123 | "Function to do the work of `list-tags' (which see).") | |
124 | (defvar tags-apropos-function nil | |
125 | "Function to do the work of `tags-apropos' (which see).") | |
126 | (defvar tags-included-tables-function nil | |
127 | "Function to do the work of `tags-included-tables' (which see).") | |
128 | (defvar verify-tags-table-function nil | |
129 | "Function to return t iff the current buffer vontains a valid | |
130 | \(already initialized\) tags file.") | |
131 | \f | |
132 | (defun initialize-new-tags-table () | |
133 | "Initialize the tags table in the current buffer. | |
134 | Returns non-nil iff it is a valid tags table." | |
135 | (make-local-variable 'tag-lines-already-matched) | |
136 | (make-local-variable 'tags-table-files) | |
137 | (make-local-variable 'tags-completion-table) | |
138 | (make-local-variable 'tags-included-tables) | |
139 | (setq tags-table-files nil | |
140 | tag-lines-already-matched nil | |
141 | tags-completion-table nil | |
142 | tags-included-tables nil) | |
143 | ;; Value is t if we have found a valid tags table buffer. | |
144 | (let ((hooks tags-table-format-hooks)) | |
145 | (while (and hooks | |
146 | (not (funcall (car hooks)))) | |
147 | (setq hooks (cdr hooks))) | |
148 | hooks)) | |
ff1f0fa6 | 149 | |
c086701a | 150 | ;;;###autoload |
9708f7fc RM |
151 | (defun visit-tags-table (file &optional local) |
152 | "Tell tags commands to use tags table file FILE. | |
ff1f0fa6 | 153 | FILE should be the name of a file created with the `etags' program. |
9708f7fc RM |
154 | A directory name is ok too; it means file TAGS in that directory. |
155 | ||
156 | Normally \\[visit-tags-table] sets the global value of `tags-file-name'. | |
157 | With a prefix arg, set the buffer-local value instead. | |
158 | When you find a tag with \\[find-tag], the buffer it finds the tag | |
159 | in is given a local value of this variable which is the name of the tags | |
160 | file the tag was in." | |
ff1f0fa6 JB |
161 | (interactive (list (read-file-name "Visit tags table: (default TAGS) " |
162 | default-directory | |
9708f7fc RM |
163 | (expand-file-name "TAGS" |
164 | default-directory) | |
165 | t) | |
166 | current-prefix-arg)) | |
e373f201 | 167 | (setq file (abbreviate-file-name (expand-file-name file))) |
ff1f0fa6 | 168 | (if (file-directory-p file) |
9708f7fc RM |
169 | (setq file (expand-file-name "TAGS" file))) |
170 | (if local | |
171 | (setq tags-file-name file) | |
172 | (kill-local-variable 'tags-file-name) | |
173 | (setq-default tags-file-name file)) | |
174 | (save-excursion | |
175 | (visit-tags-file t))) | |
176 | ||
177 | (defun visit-tags-table-buffer (&optional cont) | |
178 | "Select the buffer containing the current tags table. | |
179 | If optional arg is t, visit the next table in `tags-table-list'. | |
180 | If optional arg is the atom `reset', reset to the head of `tags-table-list'. | |
181 | If optional arg is the atom `same', don't look for a new table; | |
182 | just select the buffer. | |
183 | If arg is nil or absent, choose a buffer from information in | |
184 | `tags-file-name', `tags-table-list', `tags-table-list-pointer'. | |
185 | Returns t if it visits a tags table, or nil if there are no more in the list." | |
186 | (if (eq cont 'same) | |
187 | (let ((tags-file-name (car tags-table-list-pointer))) | |
188 | (if (null tags-file-name) | |
189 | nil | |
190 | (visit-tags-file nil) | |
191 | t)) | |
192 | (let ((put-in-list t)) | |
193 | (if (cond ((eq cont 'reset) | |
194 | (setq tags-table-list-pointer tags-table-list | |
195 | cont nil) | |
196 | nil) | |
197 | (cont | |
198 | (setq tags-table-list-pointer (cdr tags-table-list-pointer)) | |
199 | (if (tags-included-tables) | |
200 | (progn | |
201 | ;; Move into the included tags tables. | |
202 | (if tags-table-list-pointer | |
203 | (setq tags-table-parent-pointer-list | |
204 | (cons tags-table-list-pointer | |
205 | tags-table-parent-pointer-list))) | |
206 | (setq tags-table-list-pointer tags-included-tables))) | |
207 | (or tags-table-list-pointer | |
208 | ;; Pop back to the tags table after the one which includes | |
209 | ;; this one. | |
210 | (setq tags-table-list-pointer | |
211 | (car tags-table-parent-pointer-list) | |
212 | tags-table-parent-pointer-list | |
213 | (cdr tags-table-parent-pointer-list))) | |
214 | (setq put-in-list nil) | |
215 | (null tags-table-list-pointer))) | |
216 | ;; No more tags table files in the list. | |
217 | nil | |
218 | (setq tags-file-name | |
219 | (or (if cont | |
220 | (and tags-table-list-pointer | |
221 | (or (car tags-table-list-pointer) | |
222 | ;; nil means look for TAGS in current directory. | |
223 | (if (file-exists-p | |
224 | (expand-file-name "TAGS" | |
225 | default-directory)) | |
226 | (expand-file-name "TAGS" | |
227 | default-directory)))) | |
228 | (cdr (assq 'tags-file-name (buffer-local-variables)))) | |
229 | (and default-tags-table-function | |
230 | (funcall default-tags-table-function)) | |
231 | (car tags-table-list-pointer) | |
232 | tags-file-name | |
233 | (expand-file-name | |
234 | (read-file-name "Visit tags table: (default TAGS) " | |
235 | default-directory | |
236 | (expand-file-name "TAGS" default-directory) | |
237 | t)))) | |
238 | (if (file-directory-p tags-file-name) | |
239 | (setq tags-file-name (expand-file-name "TAGS" tags-file-name))) | |
240 | (visit-tags-file put-in-list) | |
241 | t)))) | |
242 | ||
243 | ;; Visit tags-file-name and check that it's a valid tags table. | |
244 | ;; On return, tags-table-list and tags-table-list-pointer | |
245 | ;; point to tags-file-name. | |
246 | (defun visit-tags-file (put-in-list) | |
247 | ;; FILE is never changed, but we don't just use tags-file-name | |
248 | ;; directly because we don't want to get its buffer-local value | |
249 | ;; in the buffer we switch to. | |
250 | (let ((file tags-file-name)) | |
251 | (if (if (get-file-buffer file) | |
252 | (let (win) | |
253 | (set-buffer (get-file-buffer file)) | |
254 | (setq win (or verify-tags-table-function | |
255 | (initialize-new-tags-table))) | |
256 | (if (or (verify-visited-file-modtime (current-buffer)) | |
257 | (not (yes-or-no-p | |
258 | "Tags file has changed, read new contents? "))) | |
259 | (and win (funcall verify-tags-table-function)) | |
260 | (revert-buffer t t) | |
261 | (initialize-new-tags-table))) | |
262 | (set-buffer (find-file-noselect file)) | |
263 | (initialize-new-tags-table)) | |
264 | ||
265 | (if (and put-in-list | |
266 | (not (equal file (car tags-table-list-pointer)))) | |
267 | (let (elt) | |
268 | ;; Bury the tags table buffer so it | |
269 | ;; doesn't get in the user's way. | |
270 | (bury-buffer (current-buffer)) | |
271 | ;; Look for this file in the current list of tags files. | |
272 | (if (setq elt (member file tags-table-list)) | |
273 | (if (eq elt tags-table-list) | |
274 | ;; Already at the head of the list. | |
275 | () | |
276 | ;; Rotate this element to the head of the search list. | |
277 | (setq tags-table-list-pointer (nconc elt tags-table-list)) | |
278 | (while (not (eq (cdr tags-table-list) elt)) | |
279 | (setq tags-table-list (cdr tags-table-list))) | |
280 | (setcdr tags-table-list nil) | |
281 | (setq tags-table-list tags-table-list-pointer)) | |
282 | ;; The table is not in the current set. | |
283 | ;; Try to find it in another previously used set. | |
284 | (let ((sets tags-table-set-list)) | |
285 | (while (and sets | |
286 | (not (setq elt (member file | |
287 | (car sets))))) | |
288 | (setq sets (cdr sets))) | |
289 | (if sets | |
290 | (progn | |
291 | ;; Found in some other set. Switch to that set, making | |
292 | ;; the selected tags table the head of the search list. | |
293 | (or (memq tags-table-list tags-table-set-list) | |
294 | ;; Save the current list. | |
295 | (setq tags-table-set-list | |
296 | (cons tags-table-list tags-table-set-list))) | |
297 | (setq tags-table-list (car sets)) | |
298 | (if (eq elt tags-table-list) | |
299 | ;; Already at the head of the list | |
300 | () | |
301 | ;; Rotate this element to the head of the list. | |
302 | (setq tags-table-list-pointer | |
303 | (nconc elt tags-table-list)) | |
304 | (while (not (eq (cdr tags-table-list) elt)) | |
305 | (setq tags-table-list (cdr tags-table-list))) | |
306 | (setcdr tags-table-list nil) | |
307 | (setq tags-table-list tags-table-list-pointer) | |
308 | (setcar sets tags-table-list))) | |
309 | ;; Not found in any current set. | |
310 | (if (and tags-table-list | |
311 | (y-or-n-p | |
312 | (concat "Add " file | |
313 | " to current list of tags tables? "))) | |
314 | ;; Add it to the current list. | |
315 | (setq tags-table-list | |
316 | (cons file tags-table-list)) | |
317 | ;; Make a fresh list, and store the old one. | |
318 | (or (memq tags-table-list tags-table-set-list) | |
319 | (setq tags-table-set-list | |
320 | (cons tags-table-list tags-table-set-list))) | |
321 | (setq tags-table-list (cons file nil))) | |
322 | (setq tags-table-list-pointer tags-table-list)))))) | |
323 | ||
324 | ;; The buffer was not valid. Don't use it again. | |
325 | (kill-local-variable 'tags-file-name) | |
326 | (setq tags-file-name nil) | |
327 | (error "File %s is not a valid tags table" buffer-file-name)))) | |
ff1f0fa6 JB |
328 | |
329 | (defun file-of-tag () | |
330 | "Return the file name of the file whose tags point is within. | |
9708f7fc RM |
331 | Assumes the tags table is the current buffer. |
332 | File name returned is relative to tags table file's directory." | |
333 | (funcall file-of-tag-function)) | |
ff1f0fa6 | 334 | |
c086701a | 335 | ;;;###autoload |
9708f7fc RM |
336 | (defun tags-table-files () |
337 | "Return a list of files in the current tags table. | |
ff1f0fa6 JB |
338 | File names returned are absolute." |
339 | (save-excursion | |
9708f7fc RM |
340 | (visit-tags-table-buffer) |
341 | (or tags-table-files | |
342 | (setq tags-table-files | |
343 | (funcall tags-table-files-function))))) | |
344 | ||
345 | (defun tags-included-tables () | |
346 | "Return a list of tags tables included by the current table." | |
347 | (or tags-included-tables | |
348 | (setq tags-included-tables (funcall tags-included-tables-function)))) | |
349 | \f | |
350 | ;; Build tags-completion-table on demand. The single current tags table | |
351 | ;; and its included tags tables (and their included tables, etc.) have | |
352 | ;; their tags included in the completion table. | |
353 | (defun tags-completion-table () | |
354 | (or tags-completion-table | |
355 | (condition-case () | |
356 | (prog2 | |
357 | (message "Making tags completion table for %s..." buffer-file-name) | |
358 | (let ((included (tags-included-tables)) | |
359 | (table (funcall tags-completion-table-function))) | |
360 | (save-excursion | |
361 | (while included | |
362 | (let ((tags-file-name (car included))) | |
363 | (visit-tags-file nil)) | |
364 | (if (tags-completion-table) | |
365 | (mapatoms (function | |
366 | (lambda (sym) | |
367 | (intern (symbol-name sym) table))) | |
368 | tags-completion-table)) | |
369 | (setq included (cdr included)))) | |
370 | (setq tags-completion-table table)) | |
371 | (message "Making tags completion table for %s...done" | |
372 | buffer-file-name)) | |
373 | (quit (message "Tags completion table construction aborted.") | |
374 | (setq tags-completion-table nil))))) | |
375 | ||
376 | ;; Completion function for tags. Does normal try-completion, | |
377 | ;; but builds tags-completion-table on demand. | |
378 | (defun tags-complete-tag (string predicate what) | |
379 | (save-excursion | |
380 | (visit-tags-table-buffer) | |
381 | (if (eq what t) | |
382 | (all-completions string (tags-completion-table) predicate) | |
383 | (try-completion string (tags-completion-table) predicate)))) | |
ff1f0fa6 JB |
384 | |
385 | ;; Return a default tag to search for, based on the text at point. | |
386 | (defun find-tag-default () | |
387 | (save-excursion | |
388 | (while (looking-at "\\sw\\|\\s_") | |
389 | (forward-char 1)) | |
9708f7fc RM |
390 | (if (or (re-search-backward "\\sw\\|\\s_" |
391 | (save-excursion (beginning-of-line) (point)) | |
392 | t) | |
393 | (re-search-forward "\\(\\sw\\|\\s_\\)+" | |
394 | (save-excursion (end-of-line) (point)) | |
395 | t)) | |
396 | (progn (goto-char (match-end 0)) | |
ff1f0fa6 JB |
397 | (buffer-substring (point) |
398 | (progn (forward-sexp -1) | |
399 | (while (looking-at "\\s'") | |
400 | (forward-char 1)) | |
401 | (point)))) | |
402 | nil))) | |
403 | ||
9708f7fc | 404 | ;; Read a tag name from the minibuffer with defaulting and completion. |
ff1f0fa6 | 405 | (defun find-tag-tag (string) |
9708f7fc RM |
406 | (let* ((default (funcall (or find-tag-default-function |
407 | (get major-mode 'find-tag-default-function) | |
408 | 'find-tag-default))) | |
409 | (spec (completing-read (if default | |
410 | (format "%s(default %s) " string default) | |
411 | string) | |
412 | 'tags-complete-tag))) | |
ff1f0fa6 | 413 | (list (if (equal spec "") |
9708f7fc | 414 | (or default (error "There is no default tag")) |
ff1f0fa6 JB |
415 | spec)))) |
416 | ||
c086701a | 417 | ;;;###autoload |
9708f7fc RM |
418 | (defun find-tag-noselect (tagname &optional next-p regexp-p) |
419 | "Find tag (in current tags table) whose name contains TAGNAME. | |
420 | Returns the buffer containing the tag's definition moves its point there, | |
421 | but does not select the buffer. | |
422 | The default for TAGNAME is the expression in the buffer near point. | |
423 | ||
424 | If second arg NEXT-P is non-nil (interactively, with prefix arg), search | |
425 | for another tag that matches the last tagname or regexp used. When there | |
426 | are multiple matches for a tag, more exact matches are found first. | |
ff1f0fa6 | 427 | |
9708f7fc RM |
428 | If third arg REGEXP-P is non-nil, treat TAGNAME as a regexp. |
429 | ||
430 | See documentation of variable `tags-file-name'." | |
ff1f0fa6 JB |
431 | (interactive (if current-prefix-arg |
432 | '(nil t) | |
433 | (find-tag-tag "Find tag: "))) | |
9708f7fc RM |
434 | (let ((local-find-tag-hook find-tag-hook)) |
435 | (if (not next-p) | |
436 | (visit-tags-table-buffer 'reset)) | |
437 | (find-tag-in-order tagname | |
438 | (if regexp-p | |
439 | find-tag-regexp-search-function | |
440 | find-tag-search-function) | |
441 | (if regexp-p | |
442 | find-tag-regexp-tag-order | |
443 | find-tag-tag-order) | |
444 | (if regexp-p | |
445 | find-tag-regexp-next-line-after-failure-p | |
446 | find-tag-next-line-after-failure-p) | |
447 | (if regexp-p "matching" "containing") | |
448 | (not next-p)) | |
449 | (run-hooks 'local-find-tag-hook))) | |
ff1f0fa6 | 450 | |
c086701a | 451 | ;;;###autoload |
9708f7fc RM |
452 | (defun find-tag (tagname &optional next-p) |
453 | "Find tag (in current tags table) whose name contains TAGNAME. | |
454 | Select the buffer containing the tag's definition, and move point there. | |
455 | The default for TAGNAME is the expression in the buffer around or before point. | |
c086701a | 456 | |
9708f7fc RM |
457 | If second arg NEXT-P is non-nil (interactively, with prefix arg), search |
458 | for another tag that matches the last tagname used. When there are | |
459 | multiple matches, more exact matches are found first. | |
ff1f0fa6 | 460 | |
9708f7fc | 461 | See documentation of variable `tags-file-name'." |
ff1f0fa6 JB |
462 | (interactive (if current-prefix-arg |
463 | '(nil t) | |
9708f7fc RM |
464 | (find-tag-tag "Find tag other window: "))) |
465 | (switch-to-buffer (find-tag-noselect tagname next-p))) | |
466 | ;;;###autoload (define-key esc-map "." 'find-tag) | |
ff1f0fa6 | 467 | |
daa37602 | 468 | ;;;###autoload |
9708f7fc RM |
469 | (defun find-tag-other-window (tagname &optional next-p) |
470 | "Find tag (in current tags table) whose name contains TAGNAME. | |
471 | Select the buffer containing the tag's definition | |
472 | in another window, and move point there. | |
473 | The default for TAGNAME is the expression in the buffer around or before point. | |
474 | ||
475 | If second arg NEXT-P is non-nil (interactively, with prefix arg), search | |
476 | for another tag that matches the last tagname used. When there are | |
477 | multiple matches, more exact matches are found first. | |
478 | ||
479 | See documentation of variable `tags-file-name'." | |
480 | (interactive (if current-prefix-arg | |
481 | '(nil t) | |
482 | (find-tag-tag "Find tag other window: "))) | |
483 | (switch-to-buffer-other-window (find-tag-noselect tagname next-p))) | |
484 | ;;;###autoload (define-key ctl-x-4-map "." 'find-tag-other-window) | |
485 | ||
29add8b9 | 486 | ;;;###autoload |
9708f7fc | 487 | (defun find-tag-other-frame (tagname &optional next-p) |
daa37602 JB |
488 | "Find tag (in current tag table) whose name contains TAGNAME. |
489 | Selects the buffer that the tag is contained in in another frame | |
490 | and puts point at its definition. | |
491 | If TAGNAME is a null string, the expression in the buffer | |
492 | around or before point is used as the tag name. | |
9708f7fc | 493 | If second arg NEXT-P is non-nil (interactively, with prefix arg), |
daa37602 JB |
494 | searches for the next tag in the tag table |
495 | that matches the tagname used in the previous find-tag. | |
496 | ||
9708f7fc | 497 | See documentation of variable `tags-file-name'." |
daa37602 JB |
498 | (interactive (if current-prefix-arg |
499 | '(nil t) | |
500 | (find-tag-tag "Find tag other window: "))) | |
9708f7fc RM |
501 | (let ((pop-up-frames t)) |
502 | (find-tag-other-window tagname next-p))) | |
503 | ;;;###autoload (define-key ctl-x-5-map "." 'find-tag-other-frame) | |
504 | ||
daa37602 | 505 | ;;;###autoload |
9708f7fc RM |
506 | (defun find-tag-regexp (regexp &optional next-p other-window) |
507 | "Find tag (in current tags table) whose name matches REGEXP. | |
508 | Select the buffer containing the tag's definition and move point there. | |
daa37602 | 509 | |
9708f7fc RM |
510 | If second arg NEXT-P is non-nil (interactively, with prefix arg), search |
511 | for another tag that matches the last tagname used. | |
512 | ||
513 | If third arg OTHER-WINDOW is non-nil, select the buffer in another window. | |
514 | ||
515 | See documentation of variable `tags-file-name'." | |
516 | (interactive (if current-prefix-arg | |
517 | '(nil t) | |
518 | (read-string "Find tag regexp: "))) | |
519 | (funcall (if other-window 'switch-to-buffer-other-window 'switch-to-buffer) | |
520 | (find-tag-noselect regexp next-p t))) | |
521 | \f | |
522 | ;; Internal tag finding function. | |
523 | ||
524 | ;; PATTERN is a string to pass to second arg SEARCH-FORWARD-FUNC, and to | |
525 | ;; any member of the function list ORDER (third arg). If ORDER is nil, | |
526 | ;; use saved state to continue a previous search. | |
527 | ||
528 | ;; Fourth arg MATCHING is a string, an English '-ing' word, to be used in | |
529 | ;; an error message. | |
530 | ||
531 | ;; Fifth arg NEXT-LINE-AFTER-FAILURE-P is non-nil if after a failed match, | |
532 | ;; point should be moved to the next line. | |
533 | ||
534 | ;; Algorithm is as follows. For each qualifier-func in ORDER, go to | |
535 | ;; beginning of tags file, and perform inner loop: for each naive match for | |
536 | ;; PATTERN found using SEARCH-FORWARD-FUNC, qualify the naive match using | |
537 | ;; qualifier-func. If it qualifies, go to the specified line in the | |
538 | ;; specified source file and return. Qualified matches are remembered to | |
539 | ;; avoid repetition. State is saved so that the loop can be continued. | |
540 | ||
541 | (defun find-tag-in-order (pattern search-forward-func order | |
542 | next-line-after-failure-p matching | |
543 | first-search) | |
544 | (let (file ;name of file containing tag | |
545 | tag-info ;where to find the tag in FILE | |
546 | tags-table-file ;name of tags file | |
547 | (first-table t) | |
548 | (tag-order order) | |
549 | goto-func | |
550 | ) | |
551 | (save-excursion | |
552 | (or first-search | |
553 | (visit-tags-table-buffer)) | |
554 | ;; Get a qualified match. | |
555 | (catch 'qualified-match-found | |
556 | (while (or first-table | |
557 | (visit-tags-table-buffer t)) | |
558 | ||
559 | (if first-search | |
560 | (setq tag-lines-already-matched nil)) | |
561 | ||
562 | (if first-table | |
563 | (setq first-table nil) | |
564 | ;; Start at beginning of tags file. | |
565 | (goto-char (point-min))) | |
566 | ||
567 | (setq tags-table-file buffer-file-name) | |
568 | (while order | |
569 | (while (funcall search-forward-func pattern nil t) | |
570 | ;; Naive match found. Qualify the match. | |
571 | (and (funcall (car order) pattern) | |
572 | ;; Make sure it is not a previous qualified match. | |
573 | ;; Use of `memq' depends on numbers being eq. | |
574 | (not (memq (save-excursion (beginning-of-line) (point)) | |
575 | tag-lines-already-matched)) | |
576 | (throw 'qualified-match-found nil)) | |
577 | (if next-line-after-failure-p | |
578 | (forward-line 1))) | |
579 | ;; Try the next flavor of match. | |
580 | (setq order (cdr order)) | |
581 | (goto-char (point-min))) | |
582 | (setq order tag-order)) | |
583 | ;; We throw out on match, so only get here if there were no matches. | |
584 | (error "No %stags %s %s" (if first-search "" "more ") | |
585 | matching pattern)) | |
586 | ||
587 | ;; Found a tag; extract location info. | |
588 | (beginning-of-line) | |
589 | (setq tag-lines-already-matched (cons (point) | |
590 | tag-lines-already-matched)) | |
591 | ;; Expand the filename, using the tags table buffer's default-directory. | |
592 | (setq file (expand-file-name (file-of-tag)) | |
593 | tag-info (funcall snarf-tag-function)) | |
594 | ||
595 | ;; Get the local value in the tags table buffer. | |
596 | (setq goto-func goto-tag-location-function) | |
597 | ||
598 | ;; Find the right line in the specified file. | |
599 | (set-buffer (find-file-noselect file)) | |
600 | (widen) | |
601 | (push-mark) | |
602 | (funcall goto-func tag-info) | |
603 | ||
604 | ;; Give this buffer a local value of tags-file-name. | |
605 | ;; The next time visit-tags-table-buffer is called, | |
606 | ;; it will use the same tags table that found a match in this buffer. | |
607 | (make-local-variable 'tags-file-name) | |
608 | (setq tags-file-name tags-table-file) | |
609 | ||
610 | ;; Return the buffer where the tag was found. | |
611 | (current-buffer)))) | |
612 | \f | |
613 | ;; `etags' TAGS file format support. | |
614 | ||
615 | (defun etags-recognize-tags-table () | |
616 | (and (eq (char-after 1) ?\f) | |
617 | (message "%s is an `etags' TAGS file" buffer-file-name) | |
618 | (mapcar (function (lambda (elt) | |
619 | (make-local-variable (car elt)) | |
620 | (set (car elt) (cdr elt)))) | |
621 | '((file-of-tag-function . etags-file-of-tag) | |
622 | (tags-table-files-function . etags-tags-table-files) | |
623 | (tags-completion-table-function . etags-tags-completion-table) | |
624 | (snarf-tag-function . etags-snarf-tag) | |
625 | (goto-tag-location-function . etags-goto-tag-location) | |
626 | (find-tag-regexp-search-function . re-search-forward) | |
627 | (find-tag-regexp-tag-order . (tag-re-match-p)) | |
628 | (find-tag-regexp-next-line-after-failuire-p . t) | |
629 | (find-tag-search-function . search-forward) | |
630 | (find-tag-tag-order . (tag-exact-match-p tag-word-match-p | |
631 | tag-any-match-p)) | |
632 | (find-tag-next-line-after-failure-p . nil) | |
633 | (list-tags-function . etags-list-tags) | |
634 | (tags-apropos-function . etags-tags-apropos) | |
635 | (tags-included-tables-function . etags-tags-included-tables) | |
636 | (verify-tags-table-function . etags-verify-tags-table) | |
637 | )))) | |
638 | ||
639 | (defun etags-verify-tags-table () | |
640 | (= (char-after 1) ?\f)) | |
641 | ||
642 | (defun etags-file-of-tag () | |
643 | (save-excursion | |
644 | (search-backward "\f\n") | |
645 | (forward-char 2) | |
646 | (buffer-substring (point) | |
647 | (progn (skip-chars-forward "^,") (point))))) | |
648 | ||
649 | (defun etags-tags-completion-table () | |
650 | (let ((table (make-vector 511 0))) | |
651 | (save-excursion | |
652 | (goto-char (point-min)) | |
653 | (while (search-forward "\177" nil t) | |
654 | ;; Handle multiple \177's on a line. | |
655 | (save-excursion | |
656 | (skip-chars-backward "^-A-Za-z0-9_$\n") ;sym syntax? XXX | |
657 | (or (bolp) | |
658 | (intern (buffer-substring | |
659 | (point) | |
660 | (progn | |
661 | (skip-chars-backward "-A-Za-z0-9_$") | |
662 | ;; ??? New | |
663 | ;; `::' in the middle of a C++ tag. | |
664 | (and (= (preceding-char) ?:) | |
665 | (= (char-after (- (point) 2)) ?:) | |
666 | (progn | |
667 | (backward-char 2) | |
668 | (skip-chars-backward | |
669 | "-A-Za-z0-9_$"))) | |
670 | (point))) | |
671 | table))))) | |
672 | table)) | |
673 | ||
674 | (defun etags-snarf-tag () | |
675 | (let (tag-text startpos) | |
676 | (search-forward "\177") | |
677 | (setq tag-text (buffer-substring (1- (point)) | |
678 | (save-excursion (beginning-of-line) | |
679 | (point)))) | |
680 | (search-forward ",") | |
681 | (setq startpos (string-to-int (buffer-substring | |
682 | (point) | |
683 | (progn (skip-chars-forward "0-9") | |
684 | (point))))) | |
685 | ;; Leave point on the next line of the tags file. | |
686 | (forward-line 1) | |
687 | (cons tag-text startpos))) | |
688 | ||
689 | (defun etags-goto-tag-location (tag-info) | |
690 | (let ((startpos (cdr tag-info)) | |
691 | ;; This constant is 1/2 the initial search window. | |
692 | ;; There is no sense in making it too small, | |
693 | ;; since just going around the loop once probably | |
694 | ;; costs about as much as searching 2000 chars. | |
695 | (offset 1000) | |
696 | (found nil) | |
697 | (pat (concat "^" (regexp-quote (car tag-info))))) | |
698 | (or startpos | |
699 | (setq startpos (point-min))) | |
700 | (while (and (not found) | |
701 | (progn | |
702 | (goto-char (- startpos offset)) | |
703 | (not (bobp)))) | |
704 | (setq found | |
705 | (re-search-forward pat (+ startpos offset) t) | |
706 | offset (* 3 offset))) ; expand search window | |
707 | (or found | |
708 | (re-search-forward pat nil t) | |
709 | (error "`%s' not found in %s; time to rerun etags" | |
710 | pat buffer-file-name))) | |
711 | (beginning-of-line)) | |
712 | ||
713 | (defun etags-list-tags (file) | |
714 | (goto-char 1) | |
715 | (if (not (search-forward (concat "\f\n" file ",") nil t)) | |
716 | nil | |
717 | (forward-line 1) | |
718 | (while (not (or (eobp) (looking-at "\f"))) | |
719 | (princ (buffer-substring (point) | |
720 | (progn (skip-chars-forward "^\177") | |
721 | (point)))) | |
722 | (terpri) | |
723 | (forward-line 1)))) | |
724 | ||
725 | (defun etags-tags-apropos (string) | |
726 | (goto-char 1) | |
727 | (while (re-search-forward string nil t) | |
728 | (beginning-of-line) | |
729 | (princ (buffer-substring (point) | |
730 | (progn (skip-chars-forward "^\177") | |
731 | (point)))) | |
732 | (terpri) | |
733 | (forward-line 1))) | |
734 | ||
735 | (defun etags-tags-table-files () | |
736 | (let ((files nil) | |
737 | beg) | |
738 | (goto-char (point-min)) | |
739 | (while (search-forward "\f\n" nil t) | |
740 | (setq beg (point)) | |
741 | (skip-chars-forward "^,\n") | |
742 | (or (looking-at ",include$") | |
743 | ;; Expand in the default-directory of the tags table buffer. | |
744 | (setq files (cons (expand-file-name (buffer-substring beg (point))) | |
745 | files)))) | |
746 | (nreverse files))) | |
747 | ||
748 | (defun etags-tags-included-tables () | |
749 | (let ((files nil) | |
750 | beg) | |
751 | (goto-char (point-min)) | |
752 | (while (search-forward "\f\n" nil t) | |
753 | (setq beg (point)) | |
754 | (skip-chars-forward "^,\n") | |
755 | (if (looking-at ",include$") | |
756 | ;; Expand in the default-directory of the tags table buffer. | |
757 | (setq files (cons (expand-file-name (buffer-substring beg (point))) | |
758 | files)))) | |
759 | (nreverse files))) | |
760 | \f | |
761 | ;; Empty tags file support. | |
762 | ||
763 | (defun recognize-empty-tags-table () | |
764 | (and (zerop (buffer-size)) | |
765 | (mapcar (function (lambda (sym) | |
766 | (make-local-variable sym) | |
9a50b93f | 767 | (set sym 'ignore))) |
9708f7fc RM |
768 | '(tags-table-files-function |
769 | tags-completion-table-function | |
770 | find-tag-regexp-search-function | |
771 | find-tag-search-function | |
772 | tags-apropos-function | |
773 | tags-included-tables-function)) | |
774 | (set (make-local-variable 'verify-tags-table-function) | |
775 | (function (lambda () | |
776 | (zerop (buffer-size))))))) | |
777 | \f | |
778 | ;;; Match qualifier functions for tagnames. | |
779 | ||
780 | ;; t if point is at a tag line that matches TAG "exactly". | |
781 | ;; point should be just after a string that matches TAG. | |
782 | (defun tag-exact-match-p (tag) | |
783 | (and (looking-at "[ \t();,]?.*\177") | |
784 | (let ((c (char-after (- (point) (length tag))))) | |
785 | (or (= c ?\n) (= c ?\ ) (= c ?\t))))) | |
786 | ||
787 | ;; t if point is at a tag line that matches TAG as a word. | |
788 | ;; point should be just after a string that matches TAG. | |
789 | (defun tag-word-match-p (tag) | |
790 | (and (looking-at "\\b.*\177") | |
791 | (save-excursion (backward-char (1+ (length tag))) | |
792 | (looking-at "\\b")))) | |
793 | ||
794 | ;; t if point is in a tag line with a tag containing TAG as a substring. | |
795 | (defun tag-any-match-p (tag) | |
796 | (looking-at ".*\177")) | |
ff1f0fa6 | 797 | |
9708f7fc RM |
798 | ;; t if point is at a tag line that matches RE as a regexp. |
799 | (defun tag-re-match-p (re) | |
800 | (save-excursion | |
801 | (beginning-of-line) | |
802 | (let ((bol (point))) | |
803 | (and (search-forward "\177" (save-excursion (end-of-line) (point)) t) | |
804 | (re-search-backward re bol t))))) | |
805 | \f | |
c086701a | 806 | ;;;###autoload |
9708f7fc RM |
807 | (defun next-file (&optional initialize novisit) |
808 | "Select next file among files in current tags table. | |
809 | Non-nil first argument (prefix arg, if interactive) | |
810 | initializes to the beginning of the list of files in the tags table. | |
811 | ||
812 | Non-nil second argument NOVISIT means use a temporary buffer | |
813 | to save time and avoid uninteresting warnings. | |
814 | ||
815 | Value is nil if the file was already visited; | |
816 | if the file was newly read in, the value is the filename." | |
ff1f0fa6 | 817 | (interactive "P") |
9708f7fc RM |
818 | (and initialize |
819 | (save-excursion | |
820 | (visit-tags-table-buffer 'reset) | |
821 | (setq next-file-list (tags-table-files)))) | |
ff1f0fa6 | 822 | (or next-file-list |
9708f7fc RM |
823 | (save-excursion |
824 | ;; When doing (visit-tag-table-buffer t), | |
825 | ;; the tags table buffer must be current. | |
826 | (if (and (visit-tags-table-buffer 'same) | |
827 | (visit-tags-table-buffer t)) | |
828 | (setq next-file-list (tags-table-files)) | |
829 | (and novisit | |
830 | (get-buffer " *next-file*") | |
831 | (kill-buffer " *next-file*")) | |
832 | (error "All files processed.")))) | |
833 | (let ((new (not (get-file-buffer (car next-file-list))))) | |
834 | (if (not (and new novisit)) | |
835 | (set-buffer (find-file-noselect (car next-file-list) novisit)) | |
836 | ;; Like find-file, but avoids random warning messages. | |
837 | (set-buffer (get-buffer-create " *next-file*")) | |
838 | (kill-all-local-variables) | |
839 | (erase-buffer) | |
840 | (setq new (car next-file-list)) | |
841 | (insert-file-contents new nil)) | |
842 | (setq next-file-list (cdr next-file-list)) | |
843 | new)) | |
ff1f0fa6 | 844 | |
9708f7fc RM |
845 | (defvar tags-loop-operate nil |
846 | "Form for `tags-loop-continue' to eval to change one file.") | |
847 | ||
848 | (defvar tags-loop-scan nil | |
849 | "Form for `tags-loop-continue' to eval to scan one file. | |
850 | If it returns non-nil, this file needs processing by evalling | |
851 | \`tags-loop-operate'. Otherwise, move on to the next file.") | |
ff1f0fa6 | 852 | |
c086701a | 853 | ;;;###autoload |
ff1f0fa6 JB |
854 | (defun tags-loop-continue (&optional first-time) |
855 | "Continue last \\[tags-search] or \\[tags-query-replace] command. | |
9708f7fc RM |
856 | Used noninteractively with non-nil argument to begin such a command. |
857 | Two variables control the processing we do on each file: | |
858 | the value of `tags-loop-scan' is a form to be executed on each file | |
859 | to see if it is interesting (it returns non-nil if so) | |
860 | and `tags-loop-operate' is a form to execute to operate on an interesting file | |
861 | If the latter returns non-nil, we exit; otherwise we scan the next file." | |
ff1f0fa6 | 862 | (interactive) |
9708f7fc RM |
863 | (let (new |
864 | (messaged nil)) | |
865 | (while | |
866 | (progn | |
867 | ;; Scan files quickly for the first or next interesting one. | |
868 | (while (or first-time | |
869 | (save-restriction | |
870 | (widen) | |
871 | (not (eval tags-loop-scan)))) | |
872 | (setq new (next-file first-time t)) | |
873 | ;; If NEW is non-nil, we got a temp buffer, | |
874 | ;; and NEW is the file name. | |
875 | (if (or messaged | |
876 | (and (not first-time) | |
877 | (> baud-rate search-slow-speed) | |
878 | (setq messaged t))) | |
879 | (message "Scanning file %s..." (or new buffer-file-name))) | |
880 | (setq first-time nil) | |
881 | (goto-char (point-min))) | |
882 | ||
883 | ;; If we visited it in a temp buffer, visit it now for real. | |
884 | (if new | |
885 | (let ((pos (point))) | |
886 | (erase-buffer) | |
887 | (set-buffer (find-file-noselect new)) | |
888 | (widen) | |
889 | (goto-char pos))) | |
890 | ||
891 | (switch-to-buffer (current-buffer)) | |
892 | ||
893 | ;; Now operate on the file. | |
894 | ;; If value is non-nil, continue to scan the next file. | |
895 | (eval tags-loop-operate))) | |
896 | (and messaged | |
897 | (null tags-loop-operate) | |
898 | (message "Scanning file %s...found" buffer-file-name)))) | |
899 | ||
900 | ;;;###autoload (define-key esc-map "," 'tags-loop-continue) | |
ff1f0fa6 | 901 | |
c086701a | 902 | ;;;###autoload |
ff1f0fa6 | 903 | (defun tags-search (regexp) |
9708f7fc | 904 | "Search through all files listed in tags table for match for REGEXP. |
ff1f0fa6 JB |
905 | Stops when a match is found. |
906 | To continue searching for next match, use command \\[tags-loop-continue]. | |
907 | ||
9708f7fc | 908 | See documentation of variable `tags-file-name'." |
ff1f0fa6 JB |
909 | (interactive "sTags search (regexp): ") |
910 | (if (and (equal regexp "") | |
9708f7fc RM |
911 | (eq (car tags-loop-scan) 're-search-forward) |
912 | (eq tags-loop-operate t)) | |
913 | ;; Continue last tags-search as if by M-,. | |
ff1f0fa6 | 914 | (tags-loop-continue nil) |
9708f7fc RM |
915 | (setq tags-loop-scan |
916 | (list 're-search-forward regexp nil t) | |
917 | tags-loop-operate nil) | |
ff1f0fa6 JB |
918 | (tags-loop-continue t))) |
919 | ||
c086701a | 920 | ;;;###autoload |
ff1f0fa6 | 921 | (defun tags-query-replace (from to &optional delimited) |
9708f7fc | 922 | "Query-replace-regexp FROM with TO through all files listed in tags table. |
ff1f0fa6 | 923 | Third arg DELIMITED (prefix arg) means replace only word-delimited matches. |
9708f7fc | 924 | If you exit (\\[keyboard-quit] or ESC), you can resume the query-replace |
ff1f0fa6 JB |
925 | with the command \\[tags-loop-continue]. |
926 | ||
9708f7fc RM |
927 | See documentation of variable `tags-file-name'." |
928 | (interactive | |
929 | "sTags query replace (regexp): \nsTags query replace %s by: \nP") | |
29add8b9 RM |
930 | (setq tags-loop-scan (list 'prog1 |
931 | (list 'if (list 're-search-forward form nil t) | |
932 | ;; When we find a match, move back | |
933 | ;; to the beginning of it so perform-replace | |
934 | ;; will see it. | |
935 | '(goto-char (match-beginning 0)))) | |
9708f7fc | 936 | tags-loop-operate (list 'perform-replace from to t t delimited)) |
ff1f0fa6 | 937 | (tags-loop-continue t)) |
9708f7fc | 938 | \f |
c086701a | 939 | ;;;###autoload |
9708f7fc | 940 | (defun list-tags (file) |
ff1f0fa6 | 941 | "Display list of tags in file FILE. |
9708f7fc RM |
942 | FILE should not contain a directory specification |
943 | unless it has one in the tags table." | |
944 | (interactive (list (completing-read "List tags in file: " nil | |
945 | 'tags-table-files t nil))) | |
ff1f0fa6 JB |
946 | (with-output-to-temp-buffer "*Tags List*" |
947 | (princ "Tags in file ") | |
9708f7fc | 948 | (princ file) |
ff1f0fa6 JB |
949 | (terpri) |
950 | (save-excursion | |
9708f7fc RM |
951 | (let ((first-time t) |
952 | (gotany nil)) | |
953 | (while (visit-tags-table-buffer (if first-time 'reset t)) | |
954 | (if (funcall list-tags-function file) | |
955 | (setq gotany t))) | |
956 | (or gotany | |
957 | (error "File %s not in current tags tables")))))) | |
ff1f0fa6 | 958 | |
c086701a | 959 | ;;;###autoload |
9708f7fc RM |
960 | (defun tags-apropos (regexp) |
961 | "Display list of all tags in tags table REGEXP matches." | |
962 | (interactive "sTags apropos (regexp): ") | |
ff1f0fa6 JB |
963 | (with-output-to-temp-buffer "*Tags List*" |
964 | (princ "Tags matching regexp ") | |
9708f7fc | 965 | (prin1 regexp) |
ff1f0fa6 JB |
966 | (terpri) |
967 | (save-excursion | |
9708f7fc RM |
968 | (let ((first-time nil)) |
969 | (while (visit-tags-table-buffer (if first-time 'reset t)) | |
970 | (funcall tags-apropos-function)))))) | |
971 | \f | |
972 | ;;; XXX Kludge interface. | |
aa228418 | 973 | |
9708f7fc | 974 | ;; XXX If a file is in multiple tables, selection may get the wrong one. |
29add8b9 | 975 | ;;;###autoload |
9708f7fc RM |
976 | (defun select-tags-table () |
977 | "Select a tags table file from a menu of those you have already used. | |
978 | The list of tags tables to select from is stored in `tags-table-file-list'; | |
979 | see the doc of that variable if you want to add names to the list." | |
980 | (interactive) | |
981 | (pop-to-buffer "*Tags Table List*") | |
982 | (setq buffer-read-only nil) | |
983 | (erase-buffer) | |
984 | (setq selective-display t | |
985 | selective-display-ellipses nil) | |
986 | (let ((set-list tags-table-set-list) | |
987 | (desired-point nil)) | |
988 | (if tags-table-list | |
989 | (progn | |
990 | (setq desired-point (point-marker)) | |
991 | (princ tags-table-list (current-buffer)) | |
992 | (insert "\C-m") | |
993 | (prin1 (car tags-table-list) (current-buffer)) ;invisible | |
994 | (insert "\n"))) | |
995 | (while set-list | |
996 | (if (eq (car set-list) tags-table-list) | |
997 | ;; Already printed it. | |
998 | () | |
999 | (princ (car set-list) (current-buffer)) | |
1000 | (insert "\C-m") | |
1001 | (prin1 (car (car set-list)) (current-buffer)) ;invisible | |
1002 | (insert "\n")) | |
1003 | (setq set-list (cdr set-list))) | |
1004 | (if tags-file-name | |
1005 | (progn | |
1006 | (or desired-point | |
1007 | (setq desired-point (point-marker))) | |
1008 | (insert tags-file-name "\C-m") | |
1009 | (prin1 tags-file-name (current-buffer)) ;invisible | |
1010 | (insert "\n"))) | |
1011 | (setq set-list (delete tags-file-name | |
1012 | (apply 'nconc (cons tags-table-list | |
1013 | (mapcar 'copy-sequence | |
1014 | tags-table-set-list))))) | |
1015 | (while set-list | |
1016 | (insert (car set-list) "\C-m") | |
1017 | (prin1 (car set-list) (current-buffer)) ;invisible | |
1018 | (insert "\n") | |
1019 | (setq set-list (delete (car set-list) set-list))) | |
1020 | (goto-char 1) | |
1021 | (insert-before-markers | |
1022 | "Type `t' to select a tags table or set of tags tables:\n\n") | |
1023 | (if desired-point | |
1024 | (goto-char desired-point)) | |
1025 | (set-window-start (selected-window) 1 t)) | |
1026 | (set-buffer-modified-p nil) | |
1027 | (setq buffer-read-only t | |
1028 | mode-name "Select Tags Table") | |
1029 | (let ((map (make-sparse-keymap))) | |
1030 | (define-key map "t" 'select-tags-table-select) | |
1031 | (define-key map " " 'next-line) | |
1032 | (define-key map "\^?" 'previous-line) | |
1033 | (define-key map "n" 'next-line) | |
1034 | (define-key map "p" 'previous-line) | |
1035 | (define-key map "q" 'select-tags-table-quit) | |
1036 | (use-local-map map))) | |
1037 | ||
1038 | (defun select-tags-table-select () | |
1039 | "Select the tags table named on this line." | |
1040 | (interactive) | |
1041 | (search-forward "\C-m") | |
1042 | (let ((name (read (current-buffer)))) | |
1043 | (visit-tags-table name) | |
1044 | (select-tags-table-quit) | |
1045 | (message "Tags table now %s" name))) | |
49116ac0 | 1046 | |
9708f7fc RM |
1047 | (defun select-tags-table-quit () |
1048 | "Kill the buffer and delete the selected window." | |
1049 | (interactive) | |
1050 | (kill-buffer (current-buffer)) | |
1051 | (or (one-window-p) | |
1052 | (delete-window))) | |
1053 | \f | |
1054 | ;;;###autoload | |
1055 | (defun complete-tag () | |
1056 | "Perform tags completion on the text around point. | |
1057 | Completes to the set of names listed in the current tags table. | |
1058 | The string to complete is chosen in the same way as the default | |
1059 | for \\[find-tag] (which see). See also `visit-tags-table-buffer'." | |
1060 | (interactive) | |
1061 | (let ((pattern (funcall (or find-tag-default-function | |
1062 | (get major-mode 'find-tag-default-function) | |
1063 | 'find-tag-default))) | |
1064 | beg | |
1065 | completion) | |
1066 | (or pattern | |
1067 | (error "Nothing to complete")) | |
1068 | (search-backward pattern) | |
1069 | (setq beg (point)) | |
1070 | (forward-char (length pattern)) | |
1071 | (setq completion (try-completion pattern 'tags-complete-tag nil)) | |
1072 | (cond ((eq completion t)) | |
1073 | ((null completion) | |
1074 | (message "Can't find completion for \"%s\"" pattern) | |
1075 | (ding)) | |
1076 | ((not (string= pattern completion)) | |
1077 | (delete-region beg (point)) | |
1078 | (insert completion)) | |
1079 | (t | |
1080 | (message "Making completion list...") | |
1081 | (with-output-to-temp-buffer " *Completions*" | |
1082 | (display-completion-list | |
1083 | (all-completions pattern 'tags-complete-tag nil))) | |
1084 | (message "Making completion list...%s" "done"))))) | |
1085 | ;;;###autoload (define-key esc-map "?" 'complete-tag) ;? XXX | |
1086 | \f | |
1087 | (provide 'etags) | |
e5167999 ER |
1088 | |
1089 | ;;; etags.el ends here |