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c8472948 | 1 | ;;; etags.el --- etags facility for Emacs |
e5167999 | 2 | |
20783a2b | 3 | ;; Copyright (C) 1985, 1986, 1988, 1989, 1992, 1993, 1994 |
bf349f36 | 4 | ;; Free Software Foundation, Inc. |
ff1f0fa6 | 5 | |
3a801d0c ER |
6 | ;; Author: Roland McGrath <roland@gnu.ai.mit.edu> |
7 | ;; Keywords: tools | |
8 | ||
ff1f0fa6 JB |
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 | 27 | ;;;###autoload |
b6176f64 RM |
28 | (defvar tags-file-name nil |
29 | "*File name of tags table. | |
9708f7fc | 30 | To switch to a new tags table, setting this variable is sufficient. |
b6176f64 | 31 | If you set this variable, do not also set `tags-table-list'. |
9708f7fc | 32 | Use the `etags' program to make a tags table file.") |
b6176f64 | 33 | ;; Make M-x set-variable tags-file-name like M-x visit-tags-table. |
9ef8b0d6 | 34 | ;;;###autoload (put 'tags-file-name 'variable-interactive "fVisit tags table: ") |
9708f7fc RM |
35 | |
36 | ;;;###autoload | |
b6176f64 | 37 | ;; Use `visit-tags-table-buffer' to cycle through tags tables in this list. |
9708f7fc | 38 | (defvar tags-table-list nil |
b6176f64 RM |
39 | "*List of file names of tags tables to search. |
40 | An element that is a directory means the file \"TAGS\" in that directory. | |
41 | To switch to a new list of tags tables, setting this variable is sufficient. | |
42 | If you set this variable, do not also set `tags-file-name'. | |
43 | Use the `etags' program to make a tags table file.") | |
9708f7fc | 44 | |
33633b28 RM |
45 | ;;;###autoload |
46 | (defvar tags-add-tables 'ask-user | |
0c37b824 RS |
47 | "*Control whether to add a new tags table to the current list. |
48 | t means do; nil means don't (always start a new list). | |
49 | Any other value means ask the user whether to add a new tags table | |
5f8cdaf2 RS |
50 | to the current list (as opposed to starting a new list).") |
51 | ||
a3d358c6 RM |
52 | (defvar tags-table-computed-list nil |
53 | "List of tags tables to search, computed from `tags-table-list'. | |
54 | This includes tables implicitly included by other tables. The list is not | |
55 | always complete: the included tables of a table are not known until that | |
56 | table is read into core. An element that is `t' is a placeholder | |
57 | indicating that the preceding element is a table that has not been read | |
58 | into core and might contain included tables to search. | |
59 | See `tags-table-check-computed-list'.") | |
60 | ||
61 | (defvar tags-table-computed-list-for nil | |
62 | "Value of `tags-table-list' that `tags-table-computed-list' corresponds to. | |
63 | If `tags-table-list' changes, `tags-table-computed-list' is thrown away and | |
64 | recomputed; see `tags-table-check-computed-list'.") | |
65 | ||
9708f7fc | 66 | (defvar tags-table-list-pointer nil |
a3d358c6 | 67 | "Pointer into `tags-table-computed-list' for the current state of searching. |
47f3c459 RM |
68 | Use `visit-tags-table-buffer' to cycle through tags tables in this list.") |
69 | ||
70 | (defvar tags-table-list-started-at nil | |
a3d358c6 | 71 | "Pointer into `tags-table-computed-list', where the current search started.") |
9708f7fc RM |
72 | |
73 | (defvar tags-table-set-list nil | |
74 | "List of sets of tags table which have been used together in the past. | |
75 | Each element is a list of strings which are file names.") | |
76 | ||
77 | ;;;###autoload | |
78 | (defvar find-tag-hook nil | |
79 | "*Hook to be run by \\[find-tag] after finding a tag. See `run-hooks'. | |
80 | The value in the buffer in which \\[find-tag] is done is used, | |
81 | not the value in the buffer \\[find-tag] goes to.") | |
82 | ||
83 | ;;;###autoload | |
84 | (defvar find-tag-default-function nil | |
47f3c459 RM |
85 | "*A function of no arguments used by \\[find-tag] to pick a default tag. |
86 | If nil, and the symbol that is the value of `major-mode' | |
9708f7fc RM |
87 | has a `find-tag-default-function' property (see `put'), that is used. |
88 | Otherwise, `find-tag-default' is used.") | |
89 | ||
9708f7fc | 90 | (defvar default-tags-table-function nil |
5f8cdaf2 RS |
91 | "If non-nil, a function to choose a default tags file for a buffer. |
92 | This function receives no arguments and should return the default | |
93 | tags table file to use for the current buffer.") | |
d74e816f RM |
94 | |
95 | (defvar tags-location-stack nil | |
96 | "List of markers which are locations visited by \\[find-tag]. | |
97 | Pop back to the last location with \\[negative-argument] \\[find-tag].") | |
9708f7fc RM |
98 | \f |
99 | ;; Tags table state. | |
100 | ;; These variables are local in tags table buffers. | |
ff1f0fa6 | 101 | |
9708f7fc RM |
102 | (defvar tag-lines-already-matched nil |
103 | "List of positions of beginnings of lines within the tags table | |
104 | that are already matched.") | |
ff1f0fa6 | 105 | |
9708f7fc RM |
106 | (defvar tags-table-files nil |
107 | "List of file names covered by current tags table. | |
108 | nil means it has not yet been computed; use `tags-table-files' to do so.") | |
109 | ||
110 | (defvar tags-completion-table nil | |
111 | "Alist of tag names defined in current tags table.") | |
112 | ||
113 | (defvar tags-included-tables nil | |
114 | "List of tags tables included by the current tags table.") | |
115 | ||
116 | (defvar next-file-list nil | |
117 | "List of files for \\[next-file] to process.") | |
118 | \f | |
119 | ;; Hooks for file formats. | |
120 | ||
121 | (defvar tags-table-format-hooks '(etags-recognize-tags-table | |
9ef8b0d6 | 122 | recognize-empty-tags-table) |
9708f7fc RM |
123 | "List of functions to be called in a tags table buffer to identify |
124 | the type of tags table. The functions are called in order, with no arguments, | |
125 | until one returns non-nil. The function should make buffer-local bindings | |
126 | of the format-parsing tags function variables if successful.") | |
127 | ||
128 | (defvar file-of-tag-function nil | |
129 | "Function to do the work of `file-of-tag' (which see).") | |
130 | (defvar tags-table-files-function nil | |
131 | "Function to do the work of `tags-table-files' (which see).") | |
132 | (defvar tags-completion-table-function nil | |
133 | "Function to build the tags-completion-table.") | |
134 | (defvar snarf-tag-function nil | |
135 | "Function to get info about a matched tag for `goto-tag-location-function'.") | |
136 | (defvar goto-tag-location-function nil | |
137 | "Function of to go to the location in the buffer specified by a tag. | |
138 | One argument, the tag info returned by `snarf-tag-function'.") | |
139 | (defvar find-tag-regexp-search-function nil | |
140 | "Search function passed to `find-tag-in-order' for finding a regexp tag.") | |
141 | (defvar find-tag-regexp-tag-order nil | |
142 | "Tag order passed to `find-tag-in-order' for finding a regexp tag.") | |
143 | (defvar find-tag-regexp-next-line-after-failure-p nil | |
144 | "Flag passed to `find-tag-in-order' for finding a regexp tag.") | |
145 | (defvar find-tag-search-function nil | |
146 | "Search function passed to `find-tag-in-order' for finding a tag.") | |
147 | (defvar find-tag-tag-order nil | |
148 | "Tag order passed to `find-tag-in-order' for finding a tag.") | |
149 | (defvar find-tag-next-line-after-failure-p nil | |
150 | "Flag passed to `find-tag-in-order' for finding a tag.") | |
151 | (defvar list-tags-function nil | |
152 | "Function to do the work of `list-tags' (which see).") | |
153 | (defvar tags-apropos-function nil | |
154 | "Function to do the work of `tags-apropos' (which see).") | |
155 | (defvar tags-included-tables-function nil | |
156 | "Function to do the work of `tags-included-tables' (which see).") | |
157 | (defvar verify-tags-table-function nil | |
eb8c3be9 | 158 | "Function to return t iff the current buffer contains a valid |
9708f7fc RM |
159 | \(already initialized\) tags file.") |
160 | \f | |
b6176f64 RM |
161 | ;; Initialize the tags table in the current buffer. |
162 | ;; Returns non-nil iff it is a valid tags table. On | |
163 | ;; non-nil return, the tags table state variable are | |
164 | ;; made buffer-local and initialized to nil. | |
9708f7fc | 165 | (defun initialize-new-tags-table () |
b6176f64 RM |
166 | (set (make-local-variable 'tag-lines-already-matched) nil) |
167 | (set (make-local-variable 'tags-table-files) nil) | |
168 | (set (make-local-variable 'tags-completion-table) nil) | |
169 | (set (make-local-variable 'tags-included-tables) nil) | |
9708f7fc RM |
170 | ;; Value is t if we have found a valid tags table buffer. |
171 | (let ((hooks tags-table-format-hooks)) | |
172 | (while (and hooks | |
173 | (not (funcall (car hooks)))) | |
174 | (setq hooks (cdr hooks))) | |
175 | hooks)) | |
ff1f0fa6 | 176 | |
c086701a | 177 | ;;;###autoload |
9708f7fc RM |
178 | (defun visit-tags-table (file &optional local) |
179 | "Tell tags commands to use tags table file FILE. | |
ff1f0fa6 | 180 | FILE should be the name of a file created with the `etags' program. |
9708f7fc RM |
181 | A directory name is ok too; it means file TAGS in that directory. |
182 | ||
183 | Normally \\[visit-tags-table] sets the global value of `tags-file-name'. | |
184 | With a prefix arg, set the buffer-local value instead. | |
185 | When you find a tag with \\[find-tag], the buffer it finds the tag | |
186 | in is given a local value of this variable which is the name of the tags | |
187 | file the tag was in." | |
ff1f0fa6 JB |
188 | (interactive (list (read-file-name "Visit tags table: (default TAGS) " |
189 | default-directory | |
9708f7fc RM |
190 | (expand-file-name "TAGS" |
191 | default-directory) | |
192 | t) | |
193 | current-prefix-arg)) | |
aab936ad RM |
194 | (or (stringp file) (signal 'wrong-type-argument (list 'stringp file))) |
195 | ;; Bind tags-file-name so we can control below whether the local or | |
196 | ;; global value gets set. Calling visit-tags-table-buffer will | |
197 | ;; initialize a buffer for the file and set tags-file-name to the | |
b6176f64 | 198 | ;; fully-expanded name. |
9806213d RM |
199 | (let ((tags-file-name file)) |
200 | (save-excursion | |
aab936ad | 201 | (or (visit-tags-table-buffer file) |
9806213d RM |
202 | (signal 'file-error (list "Visiting tags table" |
203 | "file does not exist" | |
204 | file))) | |
b6176f64 | 205 | ;; Set FILE to the expanded name. |
9806213d | 206 | (setq file tags-file-name))) |
9708f7fc | 207 | (if local |
b6176f64 | 208 | ;; Set the local value of tags-file-name. |
47f3c459 | 209 | (set (make-local-variable 'tags-file-name) file) |
b6176f64 | 210 | ;; Set the global value of tags-file-name. |
9806213d RM |
211 | (setq-default tags-file-name file))) |
212 | ||
a3d358c6 RM |
213 | (defun tags-table-check-computed-list () |
214 | "Compute `tags-table-computed-list' from `tags-table-list' if necessary." | |
215 | (let ((expanded-list (mapcar 'tags-expand-table-name tags-table-list))) | |
216 | (or (equal tags-table-computed-list-for expanded-list) | |
217 | ;; The list (or default-directory) has changed since last computed. | |
218 | (let* ((compute-for (mapcar 'copy-sequence expanded-list)) | |
219 | (tables (copy-sequence compute-for)) ;Mutated in the loop. | |
220 | (computed nil) | |
221 | table-buffer) | |
222 | ||
223 | (while tables | |
224 | (setq computed (cons (car tables) computed) | |
225 | table-buffer (get-file-buffer (car tables))) | |
226 | (if table-buffer | |
227 | (save-excursion | |
228 | (set-buffer table-buffer) | |
229 | (if (tags-included-tables) | |
230 | ;; Insert the included tables into the list we | |
231 | ;; are processing. | |
232 | (setcdr tables (append (tags-included-tables) | |
233 | (cdr tables))))) | |
234 | ;; This table is not in core yet. Insert a placeholder | |
235 | ;; saying we must read it into core to check for included | |
236 | ;; tables before searching the next table in the list. | |
237 | (setq computed (cons t computed))) | |
238 | (setq tables (cdr tables))) | |
239 | ||
240 | ;; Record the tags-table-list value (and the context of the | |
241 | ;; current directory) we computed from. | |
242 | (setq tags-table-computed-list-for compute-for | |
243 | tags-table-computed-list (nreverse computed)))))) | |
244 | ||
245 | ;; Extend `tags-table-computed-list' to remove the first `t' placeholder. | |
246 | ;; An element of the list that is `t' is a placeholder indicating that the | |
247 | ;; preceding element is a table that has not been read into core and might | |
248 | ;; contain included tables to search. On return, the first placeholder | |
249 | ;; element will be gone and the element before it read into core and its | |
250 | ;; included tables inserted into the list. | |
251 | (defun tags-table-extend-computed-list () | |
252 | (let ((list tags-table-computed-list)) | |
253 | (while (not (eq (nth 1 list) t)) | |
254 | (setq list (cdr list))) | |
255 | (save-excursion | |
256 | (if (tags-verify-table (car list)) | |
257 | ;; We are now in the buffer visiting (car LIST). Extract its | |
258 | ;; list of included tables and insert it into the computed list. | |
259 | (let ((tables (tags-included-tables)) | |
260 | (computed nil) | |
261 | table-buffer) | |
262 | (while tables | |
263 | (setq computed (cons (car tables) computed) | |
264 | table-buffer (get-file-buffer (car tables))) | |
265 | (if table-buffer | |
266 | (save-excursion | |
267 | (set-buffer table-buffer) | |
268 | (if (tags-included-tables) | |
269 | ;; Insert the included tables into the list we | |
270 | ;; are processing. | |
271 | (setcdr tables (append (tags-included-tables) | |
272 | tables)))) | |
273 | ;; This table is not in core yet. Insert a placeholder | |
274 | ;; saying we must read it into core to check for included | |
275 | ;; tables before searching the next table in the list. | |
276 | (setq computed (cons t computed)))) | |
277 | (setq computed (nreverse computed)) | |
278 | ;; COMPUTED now contains the list of included tables (and | |
279 | ;; tables included by them, etc.). Now splice this into the | |
280 | ;; current list. | |
281 | (setcdr list (nconc computed (cdr (cdr list))))) | |
282 | ;; It was not a valid table, so just remove the following placeholder. | |
283 | (setcdr list (cdr (cdr list))))))) | |
b6176f64 RM |
284 | |
285 | ;; Expand tags table name FILE into a complete file name. | |
47f3c459 | 286 | (defun tags-expand-table-name (file) |
47f3c459 RM |
287 | (setq file (expand-file-name file)) |
288 | (if (file-directory-p file) | |
289 | (expand-file-name "TAGS" file) | |
290 | file)) | |
291 | ||
a3d358c6 RM |
292 | ;; Like member, but comparison is done after tags-expand-table-name on both |
293 | ;; sides and elements of LIST that are t are skipped. | |
294 | (defun tags-table-list-member (file list) | |
47f3c459 | 295 | (setq file (tags-expand-table-name file)) |
a3d358c6 RM |
296 | (while (and list |
297 | (or (eq (car list) t) | |
298 | (not (string= file (tags-expand-table-name (car list)))))) | |
299 | (setq list (cdr list))) | |
47f3c459 RM |
300 | list) |
301 | ||
a3d358c6 RM |
302 | (defun tags-verify-table (file) |
303 | "Read FILE into a buffer and verify that it is a valid tags table. | |
304 | Sets the current buffer to one visiting FILE (if it exists). | |
305 | Returns non-nil iff it is a valid table." | |
306 | (if (get-file-buffer file) | |
307 | ;; The file is already in a buffer. Check for the visited file | |
308 | ;; having changed since we last used it. | |
309 | (let (win) | |
310 | (set-buffer (get-file-buffer file)) | |
311 | (setq win (or verify-tags-table-function (initialize-new-tags-table))) | |
312 | (if (or (verify-visited-file-modtime (current-buffer)) | |
313 | (not (yes-or-no-p | |
314 | (format "Tags file %s has changed, read new contents? " | |
315 | file)))) | |
316 | (and win (funcall verify-tags-table-function)) | |
317 | (revert-buffer t t) | |
318 | (initialize-new-tags-table))) | |
319 | (and (file-exists-p file) | |
320 | (progn | |
321 | (set-buffer (find-file-noselect file)) | |
322 | (or (string= file buffer-file-name) | |
323 | ;; find-file-noselect has changed the file name. | |
324 | ;; Propagate the change to tags-file-name and tags-table-list. | |
325 | (let ((tail (member file tags-table-list))) | |
326 | (if tail | |
327 | (setcar tail buffer-file-name)) | |
328 | (if (eq file tags-file-name) | |
329 | (setq tags-file-name buffer-file-name)))) | |
330 | (initialize-new-tags-table))))) | |
331 | ||
332 | ;; Subroutine of visit-tags-table-buffer. Search the current tags tables | |
333 | ;; for one that has tags for THIS-FILE (or that includes a table that | |
334 | ;; does). Returns the tail of `tags-table-computed-list' whose car is a | |
3cc3f703 RM |
335 | ;; table listing THIS-FILE; if the table is one included by another table, |
336 | ;; it is the master table that we return. If CORE-ONLY is non-nil, check | |
337 | ;; only tags tables that are already in buffers--don't visit any new files. | |
a3d358c6 | 338 | (defun tags-table-including (this-file core-only) |
a3d358c6 | 339 | (let ((tables tags-table-computed-list) |
f06df563 | 340 | (found nil)) |
a3d358c6 | 341 | ;; Loop over the list, looking for a table containing tags for THIS-FILE. |
47f3c459 RM |
342 | (while (and (not found) |
343 | tables) | |
a3d358c6 RM |
344 | (and (not core-only) |
345 | (eq (nth 1 tables) t) | |
346 | ;; This table has not been read into core yet. Read it in now. | |
347 | (tags-table-extend-computed-list)) | |
348 | ||
349 | (if (eq (nth 1 tables) t) | |
350 | ;; Skip this table not in core. | |
351 | (setq tables (cdr (cdr tables)))) | |
352 | ||
3cc3f703 RM |
353 | (if tables |
354 | ;; Select the tags table buffer and get the file list up to date. | |
355 | (let ((tags-file-name (car tables))) | |
356 | (visit-tags-table-buffer 'same) | |
357 | (if (member this-file (tags-table-files)) | |
358 | ;; Found it. | |
359 | (setq found tables)))) | |
47f3c459 | 360 | (setq tables (cdr tables))) |
3cc3f703 RM |
361 | (if found |
362 | ;; Now determine if the table we found was one included by another | |
363 | ;; table, not explicitly listed. | |
364 | (let ((could-be nil) | |
365 | (elt tags-table-computed-list)) | |
366 | (while (not (eq elt (cdr found))) | |
367 | (if (tags-table-list-member (car elt) tags-table-list) | |
368 | ;; This table appears in the user's list, so it could be | |
369 | ;; the one which includes the table we found. | |
370 | (setq could-be (cons (car elt) could-be))) | |
371 | (setq elt (cdr elt))) | |
372 | ;; The last element we found in the computed list before | |
373 | ;; FOUND that appears in the | |
47f3c459 | 374 | found)) |
9708f7fc | 375 | |
a3d358c6 RM |
376 | ;; Subroutine of visit-tags-table-buffer. Move tags-table-list-pointer |
377 | ;; along and set tags-file-name. Returns nil when out of tables. | |
378 | (defun tags-next-table () | |
379 | ;; If there is a placeholder element next, compute the list to replace it. | |
380 | (while (eq (nth 1 tags-table-list-pointer) t) | |
381 | (tags-table-extend-computed-list)) | |
382 | ||
383 | ;; Go to the next table in the list. | |
384 | (setq tags-table-list-pointer (cdr tags-table-list-pointer)) | |
385 | (or tags-table-list-pointer | |
386 | ;; Wrap around. | |
387 | (setq tags-table-list-pointer tags-table-computed-list)) | |
388 | ||
389 | (if (eq tags-table-list-pointer tags-table-list-started-at) | |
390 | ;; We have come full circle. No more tables. | |
391 | (setq tags-table-list-pointer nil) | |
392 | ;; Set tags-file-name to the name from the list. It is already expanded. | |
393 | (setq tags-file-name (car tags-table-list-pointer)))) | |
394 | ||
9708f7fc RM |
395 | (defun visit-tags-table-buffer (&optional cont) |
396 | "Select the buffer containing the current tags table. | |
aab936ad | 397 | If optional arg is a string, visit that file as a tags table. |
9708f7fc | 398 | If optional arg is t, visit the next table in `tags-table-list'. |
9708f7fc | 399 | If optional arg is the atom `same', don't look for a new table; |
b6176f64 | 400 | just select the buffer visiting `tags-file-name'. |
47f3c459 | 401 | If arg is nil or absent, choose a first buffer from information in |
b6176f64 | 402 | `tags-file-name', `tags-table-list', `tags-table-list-pointer'. |
9708f7fc | 403 | Returns t if it visits a tags table, or nil if there are no more in the list." |
b6176f64 RM |
404 | |
405 | ;; Set tags-file-name to the tags table file we want to visit. | |
a3d358c6 RM |
406 | (cond ((eq cont 'same) |
407 | ;; Use the ambient value of tags-file-name. | |
408 | (or tags-file-name | |
409 | (error (substitute-command-keys | |
410 | (concat "No tags table in use! " | |
411 | "Use \\[visit-tags-table] to select one."))))) | |
412 | ||
413 | ((eq t cont) | |
414 | ;; Find the next table. | |
415 | (if (tags-next-table) | |
416 | ;; Skip over nonexistent files. | |
417 | (while (and (not (or (get-file-buffer tags-file-name) | |
418 | (file-exists-p tags-file-name))) | |
419 | (tags-next-table))))) | |
420 | ||
421 | (t | |
422 | ;; Pick a table out of our hat. | |
423 | (tags-table-check-computed-list) ;Get it up to date, we might use it. | |
424 | (setq tags-file-name | |
425 | (or | |
426 | ;; If passed a string, use that. | |
427 | (if (stringp cont) | |
428 | (prog1 cont | |
429 | (setq cont nil))) | |
430 | ;; First, try a local variable. | |
431 | (cdr (assq 'tags-file-name (buffer-local-variables))) | |
432 | ;; Second, try a user-specified function to guess. | |
433 | (and default-tags-table-function | |
434 | (funcall default-tags-table-function)) | |
435 | ;; Third, look for a tags table that contains tags for the | |
436 | ;; current buffer's file. If one is found, the lists will | |
437 | ;; be frobnicated, and CONT will be set non-nil so we don't | |
438 | ;; do it below. | |
439 | (and buffer-file-name | |
440 | (car (or | |
441 | ;; First check only tables already in buffers. | |
442 | (tags-table-including buffer-file-name t) | |
443 | ;; Since that didn't find any, now do the | |
444 | ;; expensive version: reading new files. | |
445 | (tags-table-including buffer-file-name nil)))) | |
446 | ;; Fourth, use the user variable tags-file-name, if it is | |
447 | ;; not already in the current list. | |
448 | (and tags-file-name | |
449 | (not (tags-table-list-member tags-file-name | |
450 | tags-table-computed-list)) | |
451 | tags-file-name) | |
452 | ;; Fifth, use the user variable giving the table list. | |
453 | ;; Find the first element of the list that actually exists. | |
454 | (let ((list tags-table-list) | |
455 | file) | |
456 | (while (and list | |
457 | (setq file (tags-expand-table-name (car list))) | |
458 | (not (get-file-buffer file)) | |
459 | (not (file-exists-p file))) | |
460 | (setq list (cdr list))) | |
461 | (car list)) | |
462 | ;; Finally, prompt the user for a file name. | |
463 | (expand-file-name | |
464 | (read-file-name "Visit tags table: (default TAGS) " | |
465 | default-directory | |
466 | "TAGS" | |
467 | t)))))) | |
468 | ||
469 | ;; Expand the table name into a full file name. | |
470 | (setq tags-file-name (tags-expand-table-name tags-file-name)) | |
471 | ||
472 | (if (and (eq cont t) | |
473 | (null tags-table-list-pointer)) | |
474 | ;; All out of tables. | |
475 | nil | |
476 | ||
477 | ;; Verify that tags-file-name names a valid tags table. | |
478 | (if (tags-verify-table tags-file-name) | |
479 | ||
480 | ;; We have a valid tags table. | |
481 | (progn | |
482 | ;; Bury the tags table buffer so it | |
483 | ;; doesn't get in the user's way. | |
484 | (bury-buffer (current-buffer)) | |
485 | ||
486 | ;; If this was a new table selection (CONT is nil), make | |
487 | ;; sure tags-table-list includes the chosen table, and | |
488 | ;; update the list pointer variables. | |
489 | (or cont | |
490 | ;; Look in the list for the table we chose. | |
491 | (let ((found (tags-table-list-member tags-file-name | |
492 | tags-table-computed-list))) | |
493 | (if found | |
494 | ;; There it is. Just switch to it. | |
495 | (setq tags-table-list-pointer found | |
496 | tags-table-list-started-at found) | |
497 | ||
498 | ;; The table is not in the current set. | |
499 | ;; Try to find it in another previously used set. | |
500 | (let ((sets tags-table-set-list)) | |
501 | (while (and sets | |
502 | (not (tags-table-list-member tags-file-name | |
503 | (car sets)))) | |
504 | (setq sets (cdr sets))) | |
505 | (if sets | |
506 | ;; Found in some other set. Switch to that set. | |
507 | (progn | |
508 | (or (memq tags-table-list tags-table-set-list) | |
509 | ;; Save the current list. | |
f06df563 RM |
510 | (setq tags-table-set-list |
511 | (cons tags-table-list | |
512 | tags-table-set-list))) | |
a3d358c6 RM |
513 | (setq tags-table-list (car sets))) |
514 | ||
515 | ;; Not found in any existing set. | |
516 | (if (and tags-table-list | |
517 | (or (eq t tags-add-tables) | |
518 | (and tags-add-tables | |
519 | (y-or-n-p | |
520 | (concat "Keep current list of " | |
521 | "tags tables also? "))))) | |
522 | ;; Add it to the current list. | |
523 | (setq tags-table-list (cons tags-file-name | |
524 | tags-table-list)) | |
525 | ||
526 | ;; Make a fresh list, and store the old one. | |
527 | (message "Starting a new list of tags tables") | |
528 | (or (null tags-table-list) | |
529 | (memq tags-table-list tags-table-set-list) | |
530 | (setq tags-table-set-list | |
531 | (cons tags-table-list | |
532 | tags-table-set-list))) | |
533 | (setq tags-table-list (list tags-file-name)))) | |
534 | ||
535 | ;; Recompute tags-table-computed-list. | |
536 | (tags-table-check-computed-list) | |
537 | ;; Set the tags table list state variables to start | |
538 | ;; over from tags-table-computed-list. | |
539 | (setq tags-table-list-started-at tags-table-computed-list | |
540 | tags-table-list-pointer tags-table-computed-list))))) | |
541 | ||
542 | ;; Return of t says the tags table is valid. | |
543 | t) | |
544 | ||
545 | ;; The buffer was not valid. Don't use it again. | |
546 | (let ((file tags-file-name)) | |
547 | (kill-local-variable 'tags-file-name) | |
548 | (if (eq file tags-file-name) | |
549 | (setq tags-file-name nil))) | |
550 | (error "File %s is not a valid tags table" file)))) | |
a128c7a0 | 551 | \f |
ff1f0fa6 JB |
552 | (defun file-of-tag () |
553 | "Return the file name of the file whose tags point is within. | |
9708f7fc RM |
554 | Assumes the tags table is the current buffer. |
555 | File name returned is relative to tags table file's directory." | |
556 | (funcall file-of-tag-function)) | |
ff1f0fa6 | 557 | |
c086701a | 558 | ;;;###autoload |
9708f7fc RM |
559 | (defun tags-table-files () |
560 | "Return a list of files in the current tags table. | |
b6176f64 | 561 | Assumes the tags table is the current buffer. |
ff1f0fa6 | 562 | File names returned are absolute." |
a128c7a0 RM |
563 | (or tags-table-files |
564 | (setq tags-table-files | |
565 | (funcall tags-table-files-function)))) | |
9708f7fc RM |
566 | |
567 | (defun tags-included-tables () | |
b6176f64 RM |
568 | "Return a list of tags tables included by the current table. |
569 | Assumes the tags table is the current buffer." | |
9708f7fc RM |
570 | (or tags-included-tables |
571 | (setq tags-included-tables (funcall tags-included-tables-function)))) | |
572 | \f | |
573 | ;; Build tags-completion-table on demand. The single current tags table | |
574 | ;; and its included tags tables (and their included tables, etc.) have | |
575 | ;; their tags included in the completion table. | |
576 | (defun tags-completion-table () | |
577 | (or tags-completion-table | |
578 | (condition-case () | |
579 | (prog2 | |
580 | (message "Making tags completion table for %s..." buffer-file-name) | |
581 | (let ((included (tags-included-tables)) | |
582 | (table (funcall tags-completion-table-function))) | |
583 | (save-excursion | |
b6176f64 RM |
584 | ;; Iterate over the list of included tables, and combine each |
585 | ;; included table's completion obarray to the parent obarray. | |
9708f7fc | 586 | (while included |
b6176f64 | 587 | ;; Visit the buffer. |
9708f7fc | 588 | (let ((tags-file-name (car included))) |
47f3c459 | 589 | (visit-tags-table-buffer 'same)) |
b6176f64 | 590 | ;; Recurse in that buffer to compute its completion table. |
9708f7fc | 591 | (if (tags-completion-table) |
b6176f64 | 592 | ;; Combine the tables. |
9708f7fc RM |
593 | (mapatoms (function |
594 | (lambda (sym) | |
595 | (intern (symbol-name sym) table))) | |
596 | tags-completion-table)) | |
597 | (setq included (cdr included)))) | |
598 | (setq tags-completion-table table)) | |
599 | (message "Making tags completion table for %s...done" | |
600 | buffer-file-name)) | |
601 | (quit (message "Tags completion table construction aborted.") | |
602 | (setq tags-completion-table nil))))) | |
603 | ||
604 | ;; Completion function for tags. Does normal try-completion, | |
605 | ;; but builds tags-completion-table on demand. | |
606 | (defun tags-complete-tag (string predicate what) | |
607 | (save-excursion | |
34d51d08 RS |
608 | ;; If we need to ask for the tag table, allow that. |
609 | (let ((enable-recursive-minibuffers t)) | |
610 | (visit-tags-table-buffer)) | |
9708f7fc RM |
611 | (if (eq what t) |
612 | (all-completions string (tags-completion-table) predicate) | |
613 | (try-completion string (tags-completion-table) predicate)))) | |
a128c7a0 | 614 | \f |
ff1f0fa6 JB |
615 | ;; Return a default tag to search for, based on the text at point. |
616 | (defun find-tag-default () | |
617 | (save-excursion | |
618 | (while (looking-at "\\sw\\|\\s_") | |
619 | (forward-char 1)) | |
9708f7fc RM |
620 | (if (or (re-search-backward "\\sw\\|\\s_" |
621 | (save-excursion (beginning-of-line) (point)) | |
622 | t) | |
623 | (re-search-forward "\\(\\sw\\|\\s_\\)+" | |
624 | (save-excursion (end-of-line) (point)) | |
625 | t)) | |
626 | (progn (goto-char (match-end 0)) | |
ff1f0fa6 JB |
627 | (buffer-substring (point) |
628 | (progn (forward-sexp -1) | |
629 | (while (looking-at "\\s'") | |
630 | (forward-char 1)) | |
631 | (point)))) | |
632 | nil))) | |
633 | ||
9708f7fc | 634 | ;; Read a tag name from the minibuffer with defaulting and completion. |
ff1f0fa6 | 635 | (defun find-tag-tag (string) |
9708f7fc RM |
636 | (let* ((default (funcall (or find-tag-default-function |
637 | (get major-mode 'find-tag-default-function) | |
638 | 'find-tag-default))) | |
639 | (spec (completing-read (if default | |
640 | (format "%s(default %s) " string default) | |
641 | string) | |
642 | 'tags-complete-tag))) | |
b6176f64 RM |
643 | (if (equal spec "") |
644 | (or default (error "There is no default tag")) | |
645 | spec))) | |
ff1f0fa6 | 646 | |
21800cb8 RM |
647 | (defvar last-tag nil |
648 | "Last tag found by \\[find-tag].") | |
649 | ||
d74e816f RM |
650 | ;; Get interactive args for find-tag{-noselect,-other-window,-regexp}. |
651 | (defun find-tag-interactive (prompt &optional no-default) | |
652 | (if current-prefix-arg | |
653 | (list nil (if (< (prefix-numeric-value current-prefix-arg) 0) | |
654 | '- | |
655 | t)) | |
656 | (list (if no-default | |
657 | (read-string prompt) | |
658 | (find-tag-tag prompt))))) | |
659 | ||
c5507689 RS |
660 | (defvar find-tag-history nil) |
661 | ||
c086701a | 662 | ;;;###autoload |
9708f7fc RM |
663 | (defun find-tag-noselect (tagname &optional next-p regexp-p) |
664 | "Find tag (in current tags table) whose name contains TAGNAME. | |
f90a6155 | 665 | Returns the buffer containing the tag's definition and moves its point there, |
9708f7fc RM |
666 | but does not select the buffer. |
667 | The default for TAGNAME is the expression in the buffer near point. | |
668 | ||
d74e816f RM |
669 | If second arg NEXT-P is t (interactively, with prefix arg), search for |
670 | another tag that matches the last tagname or regexp used. When there are | |
671 | multiple matches for a tag, more exact matches are found first. If NEXT-P | |
672 | is the atom `-' (interactively, with prefix arg that is a negative number | |
673 | or just \\[negative-argument]), pop back to the previous tag gone to. | |
ff1f0fa6 | 674 | |
9708f7fc RM |
675 | If third arg REGEXP-P is non-nil, treat TAGNAME as a regexp. |
676 | ||
677 | See documentation of variable `tags-file-name'." | |
d74e816f RM |
678 | (interactive (find-tag-interactive "Find tag: ")) |
679 | ||
c5507689 | 680 | (setq find-tag-history (cons tagname find-tag-history)) |
b6176f64 RM |
681 | ;; Save the current buffer's value of `find-tag-hook' before selecting the |
682 | ;; tags table buffer. | |
9708f7fc | 683 | (let ((local-find-tag-hook find-tag-hook)) |
d74e816f RM |
684 | (if (eq '- next-p) |
685 | ;; Pop back to a previous location. | |
686 | (if (null tags-location-stack) | |
687 | (error "No previous tag locations") | |
688 | (let ((marker (car tags-location-stack))) | |
689 | ;; Pop the stack. | |
690 | (setq tags-location-stack (cdr tags-location-stack)) | |
691 | (prog1 | |
692 | ;; Move to the saved location. | |
693 | (set-buffer (marker-buffer marker)) | |
694 | (goto-char (marker-position marker)) | |
eb8c3be9 | 695 | ;; Kill that marker so it doesn't slow down editing. |
d74e816f RM |
696 | (set-marker marker nil nil) |
697 | ;; Run the user's hook. Do we really want to do this for pop? | |
698 | (run-hooks 'local-find-tag-hook)))) | |
699 | (if next-p | |
700 | ;; Find the same table we last used. | |
701 | (visit-tags-table-buffer 'same) | |
702 | ;; Pick a table to use. | |
703 | (visit-tags-table-buffer) | |
704 | ;; Record TAGNAME for a future call with NEXT-P non-nil. | |
705 | (setq last-tag tagname)) | |
706 | (prog1 | |
707 | ;; Record the location so we can pop back to it later. | |
708 | (marker-buffer | |
709 | (car | |
710 | (setq tags-location-stack | |
711 | (cons (let ((marker (make-marker))) | |
712 | (save-excursion | |
713 | (set-buffer | |
714 | ;; find-tag-in-order does the real work. | |
715 | (find-tag-in-order | |
716 | (if next-p last-tag tagname) | |
717 | (if regexp-p | |
718 | find-tag-regexp-search-function | |
719 | find-tag-search-function) | |
720 | (if regexp-p | |
721 | find-tag-regexp-tag-order | |
722 | find-tag-tag-order) | |
723 | (if regexp-p | |
724 | find-tag-regexp-next-line-after-failure-p | |
725 | find-tag-next-line-after-failure-p) | |
726 | (if regexp-p "matching" "containing") | |
727 | (not next-p))) | |
728 | (set-marker marker (point)))) | |
729 | tags-location-stack)))) | |
730 | (run-hooks 'local-find-tag-hook))))) | |
ff1f0fa6 | 731 | |
c086701a | 732 | ;;;###autoload |
d74e816f | 733 | (defun find-tag (tagname &optional next-p regexp-p) |
9708f7fc RM |
734 | "Find tag (in current tags table) whose name contains TAGNAME. |
735 | Select the buffer containing the tag's definition, and move point there. | |
736 | The default for TAGNAME is the expression in the buffer around or before point. | |
c086701a | 737 | |
d74e816f RM |
738 | If second arg NEXT-P is t (interactively, with prefix arg), search for |
739 | another tag that matches the last tagname or regexp used. When there are | |
740 | multiple matches for a tag, more exact matches are found first. If NEXT-P | |
741 | is the atom `-' (interactively, with prefix arg that is a negative number | |
742 | or just \\[negative-argument]), pop back to the previous tag gone to. | |
ff1f0fa6 | 743 | |
9708f7fc | 744 | See documentation of variable `tags-file-name'." |
d74e816f RM |
745 | (interactive (find-tag-interactive "Find tag: ")) |
746 | (switch-to-buffer (find-tag-noselect tagname next-p regexp-p))) | |
9708f7fc | 747 | ;;;###autoload (define-key esc-map "." 'find-tag) |
ff1f0fa6 | 748 | |
daa37602 | 749 | ;;;###autoload |
d74e816f | 750 | (defun find-tag-other-window (tagname &optional next-p regexp-p) |
9708f7fc | 751 | "Find tag (in current tags table) whose name contains TAGNAME. |
d74e816f RM |
752 | Select the buffer containing the tag's definition in another window, and |
753 | move point there. The default for TAGNAME is the expression in the buffer | |
754 | around or before point. | |
9708f7fc | 755 | |
d74e816f RM |
756 | If second arg NEXT-P is t (interactively, with prefix arg), search for |
757 | another tag that matches the last tagname or regexp used. When there are | |
758 | multiple matches for a tag, more exact matches are found first. If NEXT-P | |
759 | is negative (interactively, with prefix arg that is a negative number or | |
760 | just \\[negative-argument]), pop back to the previous tag gone to. | |
9708f7fc RM |
761 | |
762 | See documentation of variable `tags-file-name'." | |
d74e816f RM |
763 | (interactive (find-tag-interactive "Find tag other window: ")) |
764 | ||
b6176f64 RM |
765 | ;; This hair is to deal with the case where the tag is found in the |
766 | ;; selected window's buffer; without the hair, point is moved in both | |
767 | ;; windows. To prevent this, we save the selected window's point before | |
768 | ;; doing find-tag-noselect, and restore it after. | |
769 | (let* ((window-point (window-point (selected-window))) | |
d74e816f | 770 | (tagbuf (find-tag-noselect tagname next-p regexp-p)) |
49693298 | 771 | (tagpoint (progn (set-buffer tagbuf) (point)))) |
b6176f64 RM |
772 | (set-window-point (prog1 |
773 | (selected-window) | |
49693298 JB |
774 | (switch-to-buffer-other-window tagbuf) |
775 | ;; We have to set this new window's point; it | |
776 | ;; might already have been displaying a | |
777 | ;; different portion of tagbuf, in which case | |
778 | ;; switch-to-buffer-other-window doesn't set | |
779 | ;; the window's point from the buffer. | |
780 | (set-window-point (selected-window) tagpoint)) | |
b6176f64 | 781 | window-point))) |
9708f7fc RM |
782 | ;;;###autoload (define-key ctl-x-4-map "." 'find-tag-other-window) |
783 | ||
29add8b9 | 784 | ;;;###autoload |
9708f7fc | 785 | (defun find-tag-other-frame (tagname &optional next-p) |
d74e816f RM |
786 | "Find tag (in current tags table) whose name contains TAGNAME. |
787 | Select the buffer containing the tag's definition in another frame, and | |
788 | move point there. The default for TAGNAME is the expression in the buffer | |
789 | around or before point. | |
790 | ||
791 | If second arg NEXT-P is t (interactively, with prefix arg), search for | |
792 | another tag that matches the last tagname or regexp used. When there are | |
793 | multiple matches for a tag, more exact matches are found first. If NEXT-P | |
794 | is negative (interactively, with prefix arg that is a negative number or | |
795 | just \\[negative-argument]), pop back to the previous tag gone to. | |
daa37602 | 796 | |
9708f7fc | 797 | See documentation of variable `tags-file-name'." |
d74e816f | 798 | (interactive (find-tag-interactive "Find tag other frame: ")) |
9708f7fc RM |
799 | (let ((pop-up-frames t)) |
800 | (find-tag-other-window tagname next-p))) | |
801 | ;;;###autoload (define-key ctl-x-5-map "." 'find-tag-other-frame) | |
802 | ||
daa37602 | 803 | ;;;###autoload |
9708f7fc RM |
804 | (defun find-tag-regexp (regexp &optional next-p other-window) |
805 | "Find tag (in current tags table) whose name matches REGEXP. | |
806 | Select the buffer containing the tag's definition and move point there. | |
daa37602 | 807 | |
d74e816f RM |
808 | If second arg NEXT-P is t (interactively, with prefix arg), search for |
809 | another tag that matches the last tagname or regexp used. When there are | |
810 | multiple matches for a tag, more exact matches are found first. If NEXT-P | |
811 | is negative (interactively, with prefix arg that is a negative number or | |
812 | just \\[negative-argument]), pop back to the previous tag gone to. | |
9708f7fc RM |
813 | |
814 | If third arg OTHER-WINDOW is non-nil, select the buffer in another window. | |
815 | ||
816 | See documentation of variable `tags-file-name'." | |
d74e816f RM |
817 | (interactive (find-tag-interactive "Find tag regexp: " t)) |
818 | ;; We go through find-tag-other-window to do all the display hair there. | |
819 | (funcall (if other-window 'find-tag-other-window 'find-tag) | |
820 | regexp next-p t)) | |
9708f7fc RM |
821 | \f |
822 | ;; Internal tag finding function. | |
823 | ||
824 | ;; PATTERN is a string to pass to second arg SEARCH-FORWARD-FUNC, and to | |
825 | ;; any member of the function list ORDER (third arg). If ORDER is nil, | |
826 | ;; use saved state to continue a previous search. | |
827 | ||
828 | ;; Fourth arg MATCHING is a string, an English '-ing' word, to be used in | |
829 | ;; an error message. | |
830 | ||
831 | ;; Fifth arg NEXT-LINE-AFTER-FAILURE-P is non-nil if after a failed match, | |
832 | ;; point should be moved to the next line. | |
833 | ||
834 | ;; Algorithm is as follows. For each qualifier-func in ORDER, go to | |
835 | ;; beginning of tags file, and perform inner loop: for each naive match for | |
836 | ;; PATTERN found using SEARCH-FORWARD-FUNC, qualify the naive match using | |
837 | ;; qualifier-func. If it qualifies, go to the specified line in the | |
838 | ;; specified source file and return. Qualified matches are remembered to | |
839 | ;; avoid repetition. State is saved so that the loop can be continued. | |
840 | ||
f90a6155 JB |
841 | (defun find-tag-in-order (pattern |
842 | search-forward-func | |
843 | order | |
844 | next-line-after-failure-p | |
845 | matching | |
846 | first-search) | |
9708f7fc RM |
847 | (let (file ;name of file containing tag |
848 | tag-info ;where to find the tag in FILE | |
849 | tags-table-file ;name of tags file | |
850 | (first-table t) | |
851 | (tag-order order) | |
852 | goto-func | |
853 | ) | |
854 | (save-excursion | |
47f3c459 RM |
855 | (or first-search ;find-tag-noselect has already done it. |
856 | (visit-tags-table-buffer 'same)) | |
857 | ||
9708f7fc RM |
858 | ;; Get a qualified match. |
859 | (catch 'qualified-match-found | |
47f3c459 | 860 | |
b6176f64 | 861 | ;; Iterate over the list of tags tables. |
9708f7fc RM |
862 | (while (or first-table |
863 | (visit-tags-table-buffer t)) | |
864 | ||
865 | (if first-search | |
866 | (setq tag-lines-already-matched nil)) | |
867 | ||
6218e8c6 RM |
868 | (and first-search first-table |
869 | ;; Start at beginning of tags file. | |
870 | (goto-char (point-min))) | |
871 | (setq first-table nil) | |
9708f7fc RM |
872 | |
873 | (setq tags-table-file buffer-file-name) | |
b6176f64 | 874 | ;; Iterate over the list of ordering predicates. |
9708f7fc RM |
875 | (while order |
876 | (while (funcall search-forward-func pattern nil t) | |
877 | ;; Naive match found. Qualify the match. | |
878 | (and (funcall (car order) pattern) | |
879 | ;; Make sure it is not a previous qualified match. | |
880 | ;; Use of `memq' depends on numbers being eq. | |
881 | (not (memq (save-excursion (beginning-of-line) (point)) | |
882 | tag-lines-already-matched)) | |
883 | (throw 'qualified-match-found nil)) | |
884 | (if next-line-after-failure-p | |
885 | (forward-line 1))) | |
886 | ;; Try the next flavor of match. | |
887 | (setq order (cdr order)) | |
888 | (goto-char (point-min))) | |
889 | (setq order tag-order)) | |
890 | ;; We throw out on match, so only get here if there were no matches. | |
891 | (error "No %stags %s %s" (if first-search "" "more ") | |
892 | matching pattern)) | |
893 | ||
894 | ;; Found a tag; extract location info. | |
895 | (beginning-of-line) | |
896 | (setq tag-lines-already-matched (cons (point) | |
897 | tag-lines-already-matched)) | |
898 | ;; Expand the filename, using the tags table buffer's default-directory. | |
899 | (setq file (expand-file-name (file-of-tag)) | |
900 | tag-info (funcall snarf-tag-function)) | |
901 | ||
b6176f64 | 902 | ;; Get the local value in the tags table buffer before switching buffers. |
9708f7fc RM |
903 | (setq goto-func goto-tag-location-function) |
904 | ||
905 | ;; Find the right line in the specified file. | |
906 | (set-buffer (find-file-noselect file)) | |
907 | (widen) | |
908 | (push-mark) | |
909 | (funcall goto-func tag-info) | |
910 | ||
911 | ;; Give this buffer a local value of tags-file-name. | |
912 | ;; The next time visit-tags-table-buffer is called, | |
913 | ;; it will use the same tags table that found a match in this buffer. | |
914 | (make-local-variable 'tags-file-name) | |
915 | (setq tags-file-name tags-table-file) | |
916 | ||
917 | ;; Return the buffer where the tag was found. | |
918 | (current-buffer)))) | |
919 | \f | |
920 | ;; `etags' TAGS file format support. | |
921 | ||
b6176f64 RM |
922 | ;; If the current buffer is a valid etags TAGS file, give it local values of |
923 | ;; the tags table format variables, and return non-nil. | |
9708f7fc | 924 | (defun etags-recognize-tags-table () |
b6176f64 | 925 | (and (etags-verify-tags-table) |
9508896e JB |
926 | ;; It is annoying to flash messages on the screen briefly, |
927 | ;; and this message is not useful. -- rms | |
928 | ;; (message "%s is an `etags' TAGS file" buffer-file-name) | |
9708f7fc | 929 | (mapcar (function (lambda (elt) |
b6176f64 | 930 | (set (make-local-variable (car elt)) (cdr elt)))) |
9708f7fc RM |
931 | '((file-of-tag-function . etags-file-of-tag) |
932 | (tags-table-files-function . etags-tags-table-files) | |
933 | (tags-completion-table-function . etags-tags-completion-table) | |
934 | (snarf-tag-function . etags-snarf-tag) | |
935 | (goto-tag-location-function . etags-goto-tag-location) | |
936 | (find-tag-regexp-search-function . re-search-forward) | |
937 | (find-tag-regexp-tag-order . (tag-re-match-p)) | |
7f7436ba | 938 | (find-tag-regexp-next-line-after-failure-p . t) |
9708f7fc RM |
939 | (find-tag-search-function . search-forward) |
940 | (find-tag-tag-order . (tag-exact-match-p tag-word-match-p | |
941 | tag-any-match-p)) | |
942 | (find-tag-next-line-after-failure-p . nil) | |
943 | (list-tags-function . etags-list-tags) | |
944 | (tags-apropos-function . etags-tags-apropos) | |
945 | (tags-included-tables-function . etags-tags-included-tables) | |
946 | (verify-tags-table-function . etags-verify-tags-table) | |
947 | )))) | |
948 | ||
b6176f64 | 949 | ;; Return non-nil iff the current buffer is a valid etags TAGS file. |
9708f7fc | 950 | (defun etags-verify-tags-table () |
e4fc4f58 RM |
951 | ;; Use eq instead of = in case char-after returns nil. |
952 | (eq (char-after 1) ?\f)) | |
9708f7fc RM |
953 | |
954 | (defun etags-file-of-tag () | |
955 | (save-excursion | |
956 | (search-backward "\f\n") | |
957 | (forward-char 2) | |
958 | (buffer-substring (point) | |
959 | (progn (skip-chars-forward "^,") (point))))) | |
960 | ||
961 | (defun etags-tags-completion-table () | |
962 | (let ((table (make-vector 511 0))) | |
963 | (save-excursion | |
964 | (goto-char (point-min)) | |
4a92b718 RM |
965 | ;; This monster regexp matches an etags tag line. |
966 | ;; \1 is the string to match; | |
967 | ;; \2 is not interesting; | |
968 | ;; \3 is the guessed tag name; XXX guess should be better eg DEFUN | |
eb6a920f RM |
969 | ;; \4 is not interesting; |
970 | ;; \5 is the explicitly-specified tag name. | |
971 | ;; \6 is the line to start searching at; | |
972 | ;; \7 is the char to start searching at. | |
4a92b718 | 973 | (while (re-search-forward |
bcd54802 | 974 | "^\\(\\(.+[^-a-zA-Z0-9_$]+\\)?\\([-a-zA-Z0-9_$]+\\)\ |
e1dec509 RM |
975 | \[^-a-zA-Z0-9_$]*\\)\177\\(\\([^\n\001]+\\)\001\\)?\ |
976 | \\([0-9]+\\)?,\\([0-9]+\\)?\n" | |
4a92b718 | 977 | nil t) |
eb6a920f | 978 | (intern (if (match-beginning 5) |
4a92b718 | 979 | ;; There is an explicit tag name. |
eb6a920f | 980 | (buffer-substring (match-beginning 5) (match-end 5)) |
4a92b718 RM |
981 | ;; No explicit tag name. Best guess. |
982 | (buffer-substring (match-beginning 3) (match-end 3))) | |
983 | table))) | |
9708f7fc RM |
984 | table)) |
985 | ||
986 | (defun etags-snarf-tag () | |
e1dec509 | 987 | (let (tag-text line startpos) |
9708f7fc RM |
988 | (search-forward "\177") |
989 | (setq tag-text (buffer-substring (1- (point)) | |
990 | (save-excursion (beginning-of-line) | |
991 | (point)))) | |
eb6a920f RM |
992 | ;; Skip explicit tag name if present. |
993 | (search-forward "\001" (save-excursion (forward-line 1) (point)) t) | |
e1dec509 RM |
994 | (if (looking-at "[0-9]") |
995 | (setq line (string-to-int (buffer-substring | |
9708f7fc RM |
996 | (point) |
997 | (progn (skip-chars-forward "0-9") | |
e1dec509 RM |
998 | (point)))))) |
999 | (search-forward ",") | |
1000 | (if (looking-at "[0-9]") | |
1001 | (setq startpos (string-to-int (buffer-substring | |
1002 | (point) | |
1003 | (progn (skip-chars-forward "0-9") | |
1004 | (point)))))) | |
9708f7fc RM |
1005 | ;; Leave point on the next line of the tags file. |
1006 | (forward-line 1) | |
e1dec509 RM |
1007 | (cons tag-text (cons line startpos)))) |
1008 | ||
1009 | ;; TAG-INFO is a cons (TEXT LINE . POSITION) where TEXT is the initial part | |
1010 | ;; of a line containing the tag and POSITION is the character position of | |
1011 | ;; TEXT within the file (starting from 1); LINE is the line number. Either | |
1012 | ;; LINE or POSITION may be nil; POSITION is used if present. If the tag | |
1013 | ;; isn't exactly at the given position then look around that position using | |
1014 | ;; a search window which expands until it hits the start of file. | |
9708f7fc | 1015 | (defun etags-goto-tag-location (tag-info) |
e1dec509 | 1016 | (let ((startpos (cdr (cdr tag-info))) |
9708f7fc RM |
1017 | ;; This constant is 1/2 the initial search window. |
1018 | ;; There is no sense in making it too small, | |
1019 | ;; since just going around the loop once probably | |
1020 | ;; costs about as much as searching 2000 chars. | |
1021 | (offset 1000) | |
1022 | (found nil) | |
cf3623c6 RS |
1023 | (pat (concat (if (eq selective-display t) |
1024 | "\\(^\\|\^m\\)" "^") | |
1025 | (regexp-quote (car tag-info))))) | |
e1dec509 RM |
1026 | ;; If no char pos was given, try the given line number. |
1027 | (or startpos | |
1028 | (if (car (cdr tag-info)) | |
1029 | (setq startpos (progn (goto-line (car (cdr tag-info))) | |
1030 | (point))))) | |
9708f7fc RM |
1031 | (or startpos |
1032 | (setq startpos (point-min))) | |
b00f856b RM |
1033 | ;; First see if the tag is right at the specified location. |
1034 | (goto-char startpos) | |
1035 | (setq found (looking-at pat)) | |
9708f7fc RM |
1036 | (while (and (not found) |
1037 | (progn | |
1038 | (goto-char (- startpos offset)) | |
1039 | (not (bobp)))) | |
1040 | (setq found | |
1041 | (re-search-forward pat (+ startpos offset) t) | |
1042 | offset (* 3 offset))) ; expand search window | |
1043 | (or found | |
1044 | (re-search-forward pat nil t) | |
f9b1c0b2 | 1045 | (error "Rerun etags: `%s' not found in %s" |
9708f7fc | 1046 | pat buffer-file-name))) |
280a1a65 RS |
1047 | ;; Position point at the right place |
1048 | ;; if the search string matched an extra Ctrl-m at the beginning. | |
1049 | (and (eq selective-display t) | |
1050 | (looking-at "\^m") | |
1051 | (forward-char 1)) | |
9708f7fc RM |
1052 | (beginning-of-line)) |
1053 | ||
1054 | (defun etags-list-tags (file) | |
1055 | (goto-char 1) | |
1056 | (if (not (search-forward (concat "\f\n" file ",") nil t)) | |
1057 | nil | |
1058 | (forward-line 1) | |
1059 | (while (not (or (eobp) (looking-at "\f"))) | |
b7277ac6 RM |
1060 | (let ((tag (buffer-substring (point) |
1061 | (progn (skip-chars-forward "^\177") | |
1062 | (point))))) | |
1063 | (princ (if (looking-at "[^\n]+\001") | |
1064 | ;; There is an explicit tag name; use that. | |
1065 | (buffer-substring (point) | |
1066 | (progn (skip-chars-forward "^\001") | |
1067 | (point))) | |
1068 | tag))) | |
9708f7fc | 1069 | (terpri) |
274d013d RS |
1070 | (forward-line 1)) |
1071 | t)) | |
9708f7fc RM |
1072 | |
1073 | (defun etags-tags-apropos (string) | |
1074 | (goto-char 1) | |
1075 | (while (re-search-forward string nil t) | |
1076 | (beginning-of-line) | |
1077 | (princ (buffer-substring (point) | |
1078 | (progn (skip-chars-forward "^\177") | |
1079 | (point)))) | |
1080 | (terpri) | |
1081 | (forward-line 1))) | |
1082 | ||
1083 | (defun etags-tags-table-files () | |
1084 | (let ((files nil) | |
1085 | beg) | |
1086 | (goto-char (point-min)) | |
1087 | (while (search-forward "\f\n" nil t) | |
1088 | (setq beg (point)) | |
1089 | (skip-chars-forward "^,\n") | |
1090 | (or (looking-at ",include$") | |
1091 | ;; Expand in the default-directory of the tags table buffer. | |
1092 | (setq files (cons (expand-file-name (buffer-substring beg (point))) | |
1093 | files)))) | |
1094 | (nreverse files))) | |
1095 | ||
1096 | (defun etags-tags-included-tables () | |
1097 | (let ((files nil) | |
1098 | beg) | |
1099 | (goto-char (point-min)) | |
1100 | (while (search-forward "\f\n" nil t) | |
1101 | (setq beg (point)) | |
1102 | (skip-chars-forward "^,\n") | |
1103 | (if (looking-at ",include$") | |
1104 | ;; Expand in the default-directory of the tags table buffer. | |
1105 | (setq files (cons (expand-file-name (buffer-substring beg (point))) | |
1106 | files)))) | |
1107 | (nreverse files))) | |
1108 | \f | |
1109 | ;; Empty tags file support. | |
1110 | ||
b6176f64 RM |
1111 | ;; Recognize an empty file and give it local values of the tags table format |
1112 | ;; variables which do nothing. | |
9708f7fc RM |
1113 | (defun recognize-empty-tags-table () |
1114 | (and (zerop (buffer-size)) | |
1115 | (mapcar (function (lambda (sym) | |
b6176f64 | 1116 | (set (make-local-variable sym) 'ignore))) |
9708f7fc RM |
1117 | '(tags-table-files-function |
1118 | tags-completion-table-function | |
1119 | find-tag-regexp-search-function | |
1120 | find-tag-search-function | |
1121 | tags-apropos-function | |
1122 | tags-included-tables-function)) | |
1123 | (set (make-local-variable 'verify-tags-table-function) | |
1124 | (function (lambda () | |
1125 | (zerop (buffer-size))))))) | |
1126 | \f | |
1127 | ;;; Match qualifier functions for tagnames. | |
b6176f64 | 1128 | ;;; XXX these functions assume etags file format. |
9708f7fc | 1129 | |
6218e8c6 RM |
1130 | ;; This might be a neat idea, but it's too hairy at the moment. |
1131 | ;;(defmacro tags-with-syntax (&rest body) | |
1132 | ;; (` (let ((current (current-buffer)) | |
1133 | ;; (otable (syntax-table)) | |
1134 | ;; (buffer (find-file-noselect (file-of-tag))) | |
1135 | ;; table) | |
1136 | ;; (unwind-protect | |
1137 | ;; (progn | |
1138 | ;; (set-buffer buffer) | |
1139 | ;; (setq table (syntax-table)) | |
1140 | ;; (set-buffer current) | |
1141 | ;; (set-syntax-table table) | |
1142 | ;; (,@ body)) | |
1143 | ;; (set-syntax-table otable))))) | |
1144 | ;;(put 'tags-with-syntax 'edebug-form-spec '(&rest form)) | |
8a4c10dc | 1145 | |
9708f7fc RM |
1146 | ;; t if point is at a tag line that matches TAG "exactly". |
1147 | ;; point should be just after a string that matches TAG. | |
6218e8c6 | 1148 | (defun tag-exact-match-p (tag) |
add3312f | 1149 | ;; The match is really exact if there is an explicit tag name. |
a3d358c6 | 1150 | (or (looking-at (concat "[^\177\n]*\177" (regexp-quote tag) "\001")) |
add3312f RM |
1151 | ;; We also call it "exact" if it is surrounded by symbol boundaries. |
1152 | ;; This is needed because etags does not always generate explicit names. | |
1153 | (and (looking-at "\\Sw.*\177") (looking-at "\\S_.*\177") | |
1154 | (save-excursion | |
1155 | (backward-char (1+ (length tag))) | |
1156 | (and (looking-at "\\Sw") (looking-at "\\S_")))))) | |
9708f7fc RM |
1157 | |
1158 | ;; t if point is at a tag line that matches TAG as a word. | |
1159 | ;; point should be just after a string that matches TAG. | |
1160 | (defun tag-word-match-p (tag) | |
1161 | (and (looking-at "\\b.*\177") | |
1162 | (save-excursion (backward-char (1+ (length tag))) | |
1163 | (looking-at "\\b")))) | |
1164 | ||
1165 | ;; t if point is in a tag line with a tag containing TAG as a substring. | |
1166 | (defun tag-any-match-p (tag) | |
1167 | (looking-at ".*\177")) | |
ff1f0fa6 | 1168 | |
9708f7fc RM |
1169 | ;; t if point is at a tag line that matches RE as a regexp. |
1170 | (defun tag-re-match-p (re) | |
1171 | (save-excursion | |
1172 | (beginning-of-line) | |
1173 | (let ((bol (point))) | |
1174 | (and (search-forward "\177" (save-excursion (end-of-line) (point)) t) | |
1175 | (re-search-backward re bol t))))) | |
1176 | \f | |
c086701a | 1177 | ;;;###autoload |
9708f7fc RM |
1178 | (defun next-file (&optional initialize novisit) |
1179 | "Select next file among files in current tags table. | |
4f1388fd RM |
1180 | |
1181 | A first argument of t (prefix arg, if interactive) initializes to the | |
1182 | beginning of the list of files in the tags table. If the argument is | |
1183 | neither nil nor t, it is evalled to initialize the list of files. | |
9708f7fc RM |
1184 | |
1185 | Non-nil second argument NOVISIT means use a temporary buffer | |
1186 | to save time and avoid uninteresting warnings. | |
1187 | ||
1188 | Value is nil if the file was already visited; | |
1189 | if the file was newly read in, the value is the filename." | |
ff1f0fa6 | 1190 | (interactive "P") |
4f1388fd RM |
1191 | (cond ((not initialize) |
1192 | ;; Not the first run. | |
1193 | ) | |
1194 | ((eq initialize t) | |
1195 | ;; Initialize the list from the tags table. | |
1196 | (save-excursion | |
1197 | ;; Visit the tags table buffer to get its list of files. | |
1198 | (visit-tags-table-buffer) | |
1199 | (setq next-file-list (tags-table-files)))) | |
1200 | (t | |
1201 | ;; Initialize the list by evalling the argument. | |
1202 | (setq next-file-list (eval initialize)))) | |
ff1f0fa6 | 1203 | (or next-file-list |
9708f7fc | 1204 | (save-excursion |
a128c7a0 | 1205 | ;; Get the files from the next tags table. |
974f8dd6 | 1206 | ;; When doing (visit-tags-table-buffer t), |
9708f7fc RM |
1207 | ;; the tags table buffer must be current. |
1208 | (if (and (visit-tags-table-buffer 'same) | |
1209 | (visit-tags-table-buffer t)) | |
1210 | (setq next-file-list (tags-table-files)) | |
1211 | (and novisit | |
1212 | (get-buffer " *next-file*") | |
1213 | (kill-buffer " *next-file*")) | |
1214 | (error "All files processed.")))) | |
1215 | (let ((new (not (get-file-buffer (car next-file-list))))) | |
1216 | (if (not (and new novisit)) | |
1217 | (set-buffer (find-file-noselect (car next-file-list) novisit)) | |
1218 | ;; Like find-file, but avoids random warning messages. | |
1219 | (set-buffer (get-buffer-create " *next-file*")) | |
1220 | (kill-all-local-variables) | |
1221 | (erase-buffer) | |
1222 | (setq new (car next-file-list)) | |
1223 | (insert-file-contents new nil)) | |
1224 | (setq next-file-list (cdr next-file-list)) | |
1225 | new)) | |
ff1f0fa6 | 1226 | |
9708f7fc RM |
1227 | (defvar tags-loop-operate nil |
1228 | "Form for `tags-loop-continue' to eval to change one file.") | |
1229 | ||
0f6b9c32 RM |
1230 | (defvar tags-loop-scan |
1231 | '(error (substitute-command-keys | |
1232 | "No \\[tags-search] or \\[tags-query-replace] in progress.")) | |
9708f7fc RM |
1233 | "Form for `tags-loop-continue' to eval to scan one file. |
1234 | If it returns non-nil, this file needs processing by evalling | |
1235 | \`tags-loop-operate'. Otherwise, move on to the next file.") | |
ff1f0fa6 | 1236 | |
c086701a | 1237 | ;;;###autoload |
ff1f0fa6 JB |
1238 | (defun tags-loop-continue (&optional first-time) |
1239 | "Continue last \\[tags-search] or \\[tags-query-replace] command. | |
4f1388fd RM |
1240 | Used noninteractively with non-nil argument to begin such a command (the |
1241 | argument is passed to `next-file', which see). | |
9708f7fc RM |
1242 | Two variables control the processing we do on each file: |
1243 | the value of `tags-loop-scan' is a form to be executed on each file | |
1244 | to see if it is interesting (it returns non-nil if so) | |
1245 | and `tags-loop-operate' is a form to execute to operate on an interesting file | |
1246 | If the latter returns non-nil, we exit; otherwise we scan the next file." | |
ff1f0fa6 | 1247 | (interactive) |
9708f7fc RM |
1248 | (let (new |
1249 | (messaged nil)) | |
1250 | (while | |
1251 | (progn | |
1252 | ;; Scan files quickly for the first or next interesting one. | |
1253 | (while (or first-time | |
1254 | (save-restriction | |
1255 | (widen) | |
1256 | (not (eval tags-loop-scan)))) | |
1257 | (setq new (next-file first-time t)) | |
1258 | ;; If NEW is non-nil, we got a temp buffer, | |
1259 | ;; and NEW is the file name. | |
1260 | (if (or messaged | |
1261 | (and (not first-time) | |
1262 | (> baud-rate search-slow-speed) | |
1263 | (setq messaged t))) | |
1264 | (message "Scanning file %s..." (or new buffer-file-name))) | |
1265 | (setq first-time nil) | |
1266 | (goto-char (point-min))) | |
1267 | ||
1268 | ;; If we visited it in a temp buffer, visit it now for real. | |
1269 | (if new | |
1270 | (let ((pos (point))) | |
1271 | (erase-buffer) | |
1272 | (set-buffer (find-file-noselect new)) | |
1273 | (widen) | |
1274 | (goto-char pos))) | |
1275 | ||
1276 | (switch-to-buffer (current-buffer)) | |
1277 | ||
1278 | ;; Now operate on the file. | |
1279 | ;; If value is non-nil, continue to scan the next file. | |
1280 | (eval tags-loop-operate))) | |
1281 | (and messaged | |
1282 | (null tags-loop-operate) | |
1283 | (message "Scanning file %s...found" buffer-file-name)))) | |
9708f7fc | 1284 | ;;;###autoload (define-key esc-map "," 'tags-loop-continue) |
ff1f0fa6 | 1285 | |
c086701a | 1286 | ;;;###autoload |
4f1388fd | 1287 | (defun tags-search (regexp &optional file-list-form) |
9708f7fc | 1288 | "Search through all files listed in tags table for match for REGEXP. |
ff1f0fa6 JB |
1289 | Stops when a match is found. |
1290 | To continue searching for next match, use command \\[tags-loop-continue]. | |
1291 | ||
9708f7fc | 1292 | See documentation of variable `tags-file-name'." |
ff1f0fa6 JB |
1293 | (interactive "sTags search (regexp): ") |
1294 | (if (and (equal regexp "") | |
9708f7fc | 1295 | (eq (car tags-loop-scan) 're-search-forward) |
b6176f64 | 1296 | (null tags-loop-operate)) |
9708f7fc | 1297 | ;; Continue last tags-search as if by M-,. |
ff1f0fa6 | 1298 | (tags-loop-continue nil) |
9708f7fc RM |
1299 | (setq tags-loop-scan |
1300 | (list 're-search-forward regexp nil t) | |
1301 | tags-loop-operate nil) | |
4f1388fd | 1302 | (tags-loop-continue (or file-list-form t)))) |
ff1f0fa6 | 1303 | |
c086701a | 1304 | ;;;###autoload |
4f1388fd | 1305 | (defun tags-query-replace (from to &optional delimited file-list-form) |
9708f7fc | 1306 | "Query-replace-regexp FROM with TO through all files listed in tags table. |
ff1f0fa6 | 1307 | Third arg DELIMITED (prefix arg) means replace only word-delimited matches. |
9708f7fc | 1308 | If you exit (\\[keyboard-quit] or ESC), you can resume the query-replace |
ff1f0fa6 JB |
1309 | with the command \\[tags-loop-continue]. |
1310 | ||
9708f7fc RM |
1311 | See documentation of variable `tags-file-name'." |
1312 | (interactive | |
1313 | "sTags query replace (regexp): \nsTags query replace %s by: \nP") | |
29add8b9 | 1314 | (setq tags-loop-scan (list 'prog1 |
312f637b | 1315 | (list 'if (list 're-search-forward from nil t) |
29add8b9 RM |
1316 | ;; When we find a match, move back |
1317 | ;; to the beginning of it so perform-replace | |
1318 | ;; will see it. | |
1319 | '(goto-char (match-beginning 0)))) | |
9708f7fc | 1320 | tags-loop-operate (list 'perform-replace from to t t delimited)) |
4f1388fd | 1321 | (tags-loop-continue (or file-list-form t))) |
9708f7fc | 1322 | \f |
c086701a | 1323 | ;;;###autoload |
9708f7fc | 1324 | (defun list-tags (file) |
ff1f0fa6 | 1325 | "Display list of tags in file FILE. |
274d013d | 1326 | FILE should not contain a directory specification." |
76c07747 RM |
1327 | (interactive (list (completing-read "List tags in file: " |
1328 | (save-excursion | |
1329 | (visit-tags-table-buffer) | |
274d013d RS |
1330 | (mapcar 'list |
1331 | (mapcar 'file-name-nondirectory | |
1332 | (tags-table-files)))) | |
76c07747 | 1333 | nil t nil))) |
ff1f0fa6 JB |
1334 | (with-output-to-temp-buffer "*Tags List*" |
1335 | (princ "Tags in file ") | |
9708f7fc | 1336 | (princ file) |
ff1f0fa6 JB |
1337 | (terpri) |
1338 | (save-excursion | |
9708f7fc RM |
1339 | (let ((first-time t) |
1340 | (gotany nil)) | |
47f3c459 | 1341 | (while (visit-tags-table-buffer (not first-time)) |
274d013d | 1342 | (setq first-time nil) |
9708f7fc RM |
1343 | (if (funcall list-tags-function file) |
1344 | (setq gotany t))) | |
1345 | (or gotany | |
274d013d | 1346 | (error "File %s not in current tags tables" file)))))) |
ff1f0fa6 | 1347 | |
c086701a | 1348 | ;;;###autoload |
9708f7fc RM |
1349 | (defun tags-apropos (regexp) |
1350 | "Display list of all tags in tags table REGEXP matches." | |
1351 | (interactive "sTags apropos (regexp): ") | |
ff1f0fa6 JB |
1352 | (with-output-to-temp-buffer "*Tags List*" |
1353 | (princ "Tags matching regexp ") | |
9708f7fc | 1354 | (prin1 regexp) |
ff1f0fa6 JB |
1355 | (terpri) |
1356 | (save-excursion | |
47f3c459 RM |
1357 | (let ((first-time t)) |
1358 | (while (visit-tags-table-buffer (not first-time)) | |
1359 | (setq first-time nil) | |
a32a25f4 | 1360 | (funcall tags-apropos-function regexp)))))) |
9708f7fc RM |
1361 | \f |
1362 | ;;; XXX Kludge interface. | |
aa228418 | 1363 | |
9708f7fc | 1364 | ;; XXX If a file is in multiple tables, selection may get the wrong one. |
29add8b9 | 1365 | ;;;###autoload |
9708f7fc RM |
1366 | (defun select-tags-table () |
1367 | "Select a tags table file from a menu of those you have already used. | |
1368 | The list of tags tables to select from is stored in `tags-table-file-list'; | |
1369 | see the doc of that variable if you want to add names to the list." | |
1370 | (interactive) | |
1371 | (pop-to-buffer "*Tags Table List*") | |
1372 | (setq buffer-read-only nil) | |
1373 | (erase-buffer) | |
9708f7fc RM |
1374 | (let ((set-list tags-table-set-list) |
1375 | (desired-point nil)) | |
1376 | (if tags-table-list | |
1377 | (progn | |
1378 | (setq desired-point (point-marker)) | |
1379 | (princ tags-table-list (current-buffer)) | |
1380 | (insert "\C-m") | |
1381 | (prin1 (car tags-table-list) (current-buffer)) ;invisible | |
1382 | (insert "\n"))) | |
1383 | (while set-list | |
1384 | (if (eq (car set-list) tags-table-list) | |
1385 | ;; Already printed it. | |
1386 | () | |
1387 | (princ (car set-list) (current-buffer)) | |
1388 | (insert "\C-m") | |
1389 | (prin1 (car (car set-list)) (current-buffer)) ;invisible | |
1390 | (insert "\n")) | |
1391 | (setq set-list (cdr set-list))) | |
1392 | (if tags-file-name | |
1393 | (progn | |
1394 | (or desired-point | |
1395 | (setq desired-point (point-marker))) | |
1396 | (insert tags-file-name "\C-m") | |
1397 | (prin1 tags-file-name (current-buffer)) ;invisible | |
1398 | (insert "\n"))) | |
1399 | (setq set-list (delete tags-file-name | |
1400 | (apply 'nconc (cons tags-table-list | |
1401 | (mapcar 'copy-sequence | |
1402 | tags-table-set-list))))) | |
1403 | (while set-list | |
1404 | (insert (car set-list) "\C-m") | |
1405 | (prin1 (car set-list) (current-buffer)) ;invisible | |
1406 | (insert "\n") | |
1407 | (setq set-list (delete (car set-list) set-list))) | |
1408 | (goto-char 1) | |
1409 | (insert-before-markers | |
1410 | "Type `t' to select a tags table or set of tags tables:\n\n") | |
1411 | (if desired-point | |
1412 | (goto-char desired-point)) | |
1413 | (set-window-start (selected-window) 1 t)) | |
1414 | (set-buffer-modified-p nil) | |
ef90db45 RS |
1415 | (select-tags-table-mode)) |
1416 | ||
1417 | (defvar select-tags-table-mode-map) | |
1418 | (let ((map (make-sparse-keymap))) | |
1419 | (define-key map "t" 'select-tags-table-select) | |
1420 | (define-key map " " 'next-line) | |
1421 | (define-key map "\^?" 'previous-line) | |
1422 | (define-key map "n" 'next-line) | |
1423 | (define-key map "p" 'previous-line) | |
1424 | (define-key map "q" 'select-tags-table-quit) | |
1425 | (setq select-tags-table-mode-map map)) | |
1426 | ||
1427 | (defun select-tags-table-mode () | |
1428 | "Major mode for choosing a current tags table among those already loaded. | |
1429 | ||
1430 | \\{select-tags-table-mode-map}" | |
1431 | (interactive) | |
1432 | (kill-all-local-variables) | |
9708f7fc | 1433 | (setq buffer-read-only t |
ef90db45 | 1434 | major-mode 'select-tags-table-mode |
9708f7fc | 1435 | mode-name "Select Tags Table") |
ef90db45 RS |
1436 | (use-local-map select-tags-table-mode-map) |
1437 | (setq selective-display t | |
1438 | selective-display-ellipses nil)) | |
9708f7fc RM |
1439 | |
1440 | (defun select-tags-table-select () | |
1441 | "Select the tags table named on this line." | |
1442 | (interactive) | |
1443 | (search-forward "\C-m") | |
1444 | (let ((name (read (current-buffer)))) | |
1445 | (visit-tags-table name) | |
1446 | (select-tags-table-quit) | |
1447 | (message "Tags table now %s" name))) | |
49116ac0 | 1448 | |
9708f7fc RM |
1449 | (defun select-tags-table-quit () |
1450 | "Kill the buffer and delete the selected window." | |
1451 | (interactive) | |
1452 | (kill-buffer (current-buffer)) | |
1453 | (or (one-window-p) | |
1454 | (delete-window))) | |
1455 | \f | |
1456 | ;;;###autoload | |
1457 | (defun complete-tag () | |
1458 | "Perform tags completion on the text around point. | |
1459 | Completes to the set of names listed in the current tags table. | |
1460 | The string to complete is chosen in the same way as the default | |
ab13123a | 1461 | for \\[find-tag] (which see)." |
9708f7fc | 1462 | (interactive) |
ab13123a RM |
1463 | (or tags-table-list |
1464 | tags-file-name | |
1465 | (error (substitute-command-keys | |
1466 | "No tags table loaded. Try \\[visit-tags-table]."))) | |
9708f7fc RM |
1467 | (let ((pattern (funcall (or find-tag-default-function |
1468 | (get major-mode 'find-tag-default-function) | |
1469 | 'find-tag-default))) | |
1470 | beg | |
1471 | completion) | |
1472 | (or pattern | |
1473 | (error "Nothing to complete")) | |
1474 | (search-backward pattern) | |
1475 | (setq beg (point)) | |
1476 | (forward-char (length pattern)) | |
1477 | (setq completion (try-completion pattern 'tags-complete-tag nil)) | |
1478 | (cond ((eq completion t)) | |
1479 | ((null completion) | |
1480 | (message "Can't find completion for \"%s\"" pattern) | |
1481 | (ding)) | |
1482 | ((not (string= pattern completion)) | |
1483 | (delete-region beg (point)) | |
1484 | (insert completion)) | |
1485 | (t | |
1486 | (message "Making completion list...") | |
c6d38ae2 | 1487 | (with-output-to-temp-buffer "*Completions*" |
9708f7fc RM |
1488 | (display-completion-list |
1489 | (all-completions pattern 'tags-complete-tag nil))) | |
1490 | (message "Making completion list...%s" "done"))))) | |
6218e8c6 RM |
1491 | |
1492 | ;;;###autoload (define-key esc-map "\t" 'complete-tag) | |
9708f7fc RM |
1493 | \f |
1494 | (provide 'etags) | |
e5167999 ER |
1495 | |
1496 | ;;; etags.el ends here |