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c8472948 | 1 | ;;; etags.el --- etags facility for Emacs |
8c8f9bc1 | 2 | |
73b0cd50 | 3 | ;; Copyright (C) 1985-1986, 1988-1989, 1992-1996, 1998, 2000-2011 Free Software Foundation, Inc. |
ff1f0fa6 | 4 | |
5762abec | 5 | ;; Author: Roland McGrath <roland@gnu.org> |
d6b8c85b | 6 | ;; Maintainer: FSF |
3a801d0c ER |
7 | ;; Keywords: tools |
8 | ||
ff1f0fa6 JB |
9 | ;; This file is part of GNU Emacs. |
10 | ||
b1fc2b50 | 11 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
ff1f0fa6 | 12 | ;; it under the terms of the GNU General Public License as published by |
b1fc2b50 GM |
13 | ;; the Free Software Foundation, either version 3 of the License, or |
14 | ;; (at your option) any later version. | |
ff1f0fa6 JB |
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 | |
b1fc2b50 | 22 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
ff1f0fa6 | 23 | |
6010664f SM |
24 | ;;; Commentary: |
25 | ||
e5167999 ER |
26 | ;;; Code: |
27 | ||
f0d732ae AS |
28 | (eval-when-compile |
29 | (require 'cl)) | |
b533f3c5 | 30 | (require 'ring) |
89228b63 | 31 | (require 'button) |
b533f3c5 | 32 | |
c086701a | 33 | ;;;###autoload |
b6176f64 RM |
34 | (defvar tags-file-name nil |
35 | "*File name of tags table. | |
9708f7fc | 36 | To switch to a new tags table, setting this variable is sufficient. |
b6176f64 | 37 | If you set this variable, do not also set `tags-table-list'. |
9708f7fc | 38 | Use the `etags' program to make a tags table file.") |
b6176f64 | 39 | ;; Make M-x set-variable tags-file-name like M-x visit-tags-table. |
1e8780b1 | 40 | ;;;###autoload (put 'tags-file-name 'variable-interactive (purecopy "fVisit tags table: ")) |
6f1a6faf | 41 | ;;;###autoload (put 'tags-file-name 'safe-local-variable 'stringp) |
9708f7fc | 42 | |
99730b0e | 43 | (defgroup etags nil "Tags tables." |
99783bde RS |
44 | :group 'tools) |
45 | ||
ece6e35a GM |
46 | ;;;###autoload |
47 | (defcustom tags-case-fold-search 'default | |
48 | "*Whether tags operations should be case-sensitive. | |
49 | A value of t means case-insensitive, a value of nil means case-sensitive. | |
50 | Any other value means use the setting of `case-fold-search'." | |
51 | :group 'etags | |
52 | :type '(choice (const :tag "Case-sensitive" nil) | |
53 | (const :tag "Case-insensitive" t) | |
54 | (other :tag "Use default" default)) | |
55 | :version "21.1") | |
56 | ||
9708f7fc | 57 | ;;;###autoload |
b6176f64 | 58 | ;; Use `visit-tags-table-buffer' to cycle through tags tables in this list. |
99783bde | 59 | (defcustom tags-table-list nil |
b6176f64 RM |
60 | "*List of file names of tags tables to search. |
61 | An element that is a directory means the file \"TAGS\" in that directory. | |
62 | To switch to a new list of tags tables, setting this variable is sufficient. | |
63 | If you set this variable, do not also set `tags-file-name'. | |
99783bde RS |
64 | Use the `etags' program to make a tags table file." |
65 | :group 'etags | |
66 | :type '(repeat file)) | |
9708f7fc | 67 | |
ddc76b00 | 68 | ;;;###autoload |
4c964351 UM |
69 | (defcustom tags-compression-info-list |
70 | (purecopy '("" ".Z" ".bz2" ".gz" ".xz" ".tgz")) | |
ddc76b00 FP |
71 | "*List of extensions tried by etags when jka-compr is used. |
72 | An empty string means search the non-compressed file. | |
73 | These extensions will be tried only if jka-compr was activated | |
1ea98518 SM |
74 | \(i.e. via customize of `auto-compression-mode' or by calling the function |
75 | `auto-compression-mode')." | |
4c964351 | 76 | :version "24.1" ; added xz |
1ea98518 | 77 | :type '(repeat string) |
ddc76b00 FP |
78 | :group 'etags) |
79 | ||
1ea98518 SM |
80 | ;; !!! tags-compression-info-list should probably be replaced by access |
81 | ;; to directory list and matching jka-compr-compression-info-list. Currently, | |
82 | ;; this implementation forces each modification of | |
83 | ;; jka-compr-compression-info-list to be reflected in this var. | |
84 | ;; An alternative could be to say that introducing a special | |
85 | ;; element in this list (e.g. t) means : try at this point | |
86 | ;; using directory listing and regexp matching using | |
87 | ;; jka-compr-compression-info-list. | |
ddc76b00 FP |
88 | |
89 | ||
33633b28 | 90 | ;;;###autoload |
99783bde | 91 | (defcustom tags-add-tables 'ask-user |
0c37b824 RS |
92 | "*Control whether to add a new tags table to the current list. |
93 | t means do; nil means don't (always start a new list). | |
94 | Any other value means ask the user whether to add a new tags table | |
99783bde RS |
95 | to the current list (as opposed to starting a new list)." |
96 | :group 'etags | |
97 | :type '(choice (const :tag "Do" t) | |
98 | (const :tag "Don't" nil) | |
add3e8b3 | 99 | (other :tag "Ask" ask-user))) |
99783bde RS |
100 | |
101 | (defcustom tags-revert-without-query nil | |
102 | "*Non-nil means reread a TAGS table without querying, if it has changed." | |
103 | :group 'etags | |
104 | :type 'boolean) | |
5f8cdaf2 | 105 | |
a3d358c6 RM |
106 | (defvar tags-table-computed-list nil |
107 | "List of tags tables to search, computed from `tags-table-list'. | |
108 | This includes tables implicitly included by other tables. The list is not | |
109 | always complete: the included tables of a table are not known until that | |
6010664f | 110 | table is read into core. An element that is t is a placeholder |
a3d358c6 RM |
111 | indicating that the preceding element is a table that has not been read |
112 | into core and might contain included tables to search. | |
113 | See `tags-table-check-computed-list'.") | |
114 | ||
115 | (defvar tags-table-computed-list-for nil | |
116 | "Value of `tags-table-list' that `tags-table-computed-list' corresponds to. | |
117 | If `tags-table-list' changes, `tags-table-computed-list' is thrown away and | |
118 | recomputed; see `tags-table-check-computed-list'.") | |
119 | ||
9708f7fc | 120 | (defvar tags-table-list-pointer nil |
a3d358c6 | 121 | "Pointer into `tags-table-computed-list' for the current state of searching. |
47f3c459 RM |
122 | Use `visit-tags-table-buffer' to cycle through tags tables in this list.") |
123 | ||
124 | (defvar tags-table-list-started-at nil | |
a3d358c6 | 125 | "Pointer into `tags-table-computed-list', where the current search started.") |
9708f7fc RM |
126 | |
127 | (defvar tags-table-set-list nil | |
128 | "List of sets of tags table which have been used together in the past. | |
129 | Each element is a list of strings which are file names.") | |
130 | ||
131 | ;;;###autoload | |
99783bde | 132 | (defcustom find-tag-hook nil |
9708f7fc RM |
133 | "*Hook to be run by \\[find-tag] after finding a tag. See `run-hooks'. |
134 | The value in the buffer in which \\[find-tag] is done is used, | |
99783bde RS |
135 | not the value in the buffer \\[find-tag] goes to." |
136 | :group 'etags | |
137 | :type 'hook) | |
9708f7fc RM |
138 | |
139 | ;;;###autoload | |
99783bde | 140 | (defcustom find-tag-default-function nil |
47f3c459 RM |
141 | "*A function of no arguments used by \\[find-tag] to pick a default tag. |
142 | If nil, and the symbol that is the value of `major-mode' | |
9708f7fc | 143 | has a `find-tag-default-function' property (see `put'), that is used. |
99783bde RS |
144 | Otherwise, `find-tag-default' is used." |
145 | :group 'etags | |
d639db36 | 146 | :type '(choice (const nil) function)) |
9708f7fc | 147 | |
b533f3c5 RS |
148 | (defcustom find-tag-marker-ring-length 16 |
149 | "*Length of marker rings `find-tag-marker-ring' and `tags-location-ring'." | |
150 | :group 'etags | |
cd32a7ba DN |
151 | :type 'integer |
152 | :version "20.3") | |
b533f3c5 | 153 | |
7e7b42b2 GM |
154 | (defcustom tags-tag-face 'default |
155 | "*Face for tags in the output of `tags-apropos'." | |
156 | :group 'etags | |
157 | :type 'face | |
158 | :version "21.1") | |
159 | ||
160 | (defcustom tags-apropos-verbose nil | |
161 | "If non-nil, print the name of the tags file in the *Tags List* buffer." | |
162 | :group 'etags | |
163 | :type 'boolean | |
164 | :version "21.1") | |
165 | ||
166 | (defcustom tags-apropos-additional-actions nil | |
167 | "Specify additional actions for `tags-apropos'. | |
168 | ||
169 | If non-nil, value should be a list of triples (TITLE FUNCTION | |
170 | TO-SEARCH). For each triple, `tags-apropos' processes TO-SEARCH and | |
171 | lists tags from it. TO-SEARCH should be an alist, obarray, or symbol. | |
172 | If it is a symbol, the symbol's value is used. | |
6010664f | 173 | TITLE, a string, is a title used to label the additional list of tags. |
7e7b42b2 GM |
174 | FUNCTION is a function to call when a symbol is selected in the |
175 | *Tags List* buffer. It will be called with one argument SYMBOL which | |
176 | is the symbol being selected. | |
177 | ||
178 | Example value: | |
179 | ||
180 | '((\"Emacs Lisp\" Info-goto-emacs-command-node obarray) | |
181 | (\"Common Lisp\" common-lisp-hyperspec common-lisp-hyperspec-obarray) | |
182 | (\"SCWM\" scwm-documentation scwm-obarray))" | |
183 | :group 'etags | |
61520f26 DL |
184 | :type '(repeat (list (string :tag "Title") |
185 | function | |
186 | (sexp :tag "Tags to search"))) | |
7e7b42b2 GM |
187 | :version "21.1") |
188 | ||
b533f3c5 RS |
189 | (defvar find-tag-marker-ring (make-ring find-tag-marker-ring-length) |
190 | "Ring of markers which are locations from which \\[find-tag] was invoked.") | |
191 | ||
9708f7fc | 192 | (defvar default-tags-table-function nil |
5f8cdaf2 RS |
193 | "If non-nil, a function to choose a default tags file for a buffer. |
194 | This function receives no arguments and should return the default | |
195 | tags table file to use for the current buffer.") | |
d74e816f | 196 | |
b533f3c5 RS |
197 | (defvar tags-location-ring (make-ring find-tag-marker-ring-length) |
198 | "Ring of markers which are locations visited by \\[find-tag]. | |
d74e816f | 199 | Pop back to the last location with \\[negative-argument] \\[find-tag].") |
9708f7fc RM |
200 | \f |
201 | ;; Tags table state. | |
202 | ;; These variables are local in tags table buffers. | |
ff1f0fa6 | 203 | |
9708f7fc RM |
204 | (defvar tags-table-files nil |
205 | "List of file names covered by current tags table. | |
206 | nil means it has not yet been computed; use `tags-table-files' to do so.") | |
207 | ||
208 | (defvar tags-completion-table nil | |
7e7b42b2 | 209 | "Obarray of tag names defined in current tags table.") |
9708f7fc RM |
210 | |
211 | (defvar tags-included-tables nil | |
212 | "List of tags tables included by the current tags table.") | |
213 | ||
214 | (defvar next-file-list nil | |
215 | "List of files for \\[next-file] to process.") | |
216 | \f | |
217 | ;; Hooks for file formats. | |
218 | ||
d6b8c85b SM |
219 | (defvar tags-table-format-functions '(etags-recognize-tags-table |
220 | tags-recognize-empty-tags-table) | |
6010664f | 221 | "Hook to be called in a tags table buffer to identify the type of tags table. |
b533f3c5 | 222 | The functions are called in order, with no arguments, |
9708f7fc RM |
223 | until one returns non-nil. The function should make buffer-local bindings |
224 | of the format-parsing tags function variables if successful.") | |
225 | ||
226 | (defvar file-of-tag-function nil | |
79e01623 JB |
227 | "Function to do the work of `file-of-tag' (which see). |
228 | One optional argument, a boolean specifying to return complete path (nil) or | |
229 | relative path (non-nil).") | |
9708f7fc RM |
230 | (defvar tags-table-files-function nil |
231 | "Function to do the work of `tags-table-files' (which see).") | |
232 | (defvar tags-completion-table-function nil | |
6010664f | 233 | "Function to build the `tags-completion-table'.") |
9708f7fc | 234 | (defvar snarf-tag-function nil |
79e01623 JB |
235 | "Function to get info about a matched tag for `goto-tag-location-function'. |
236 | One optional argument, specifying to use explicit tag (non-nil) or not (nil). | |
237 | The default is nil.") | |
9708f7fc RM |
238 | (defvar goto-tag-location-function nil |
239 | "Function of to go to the location in the buffer specified by a tag. | |
240 | One argument, the tag info returned by `snarf-tag-function'.") | |
241 | (defvar find-tag-regexp-search-function nil | |
242 | "Search function passed to `find-tag-in-order' for finding a regexp tag.") | |
243 | (defvar find-tag-regexp-tag-order nil | |
244 | "Tag order passed to `find-tag-in-order' for finding a regexp tag.") | |
245 | (defvar find-tag-regexp-next-line-after-failure-p nil | |
246 | "Flag passed to `find-tag-in-order' for finding a regexp tag.") | |
247 | (defvar find-tag-search-function nil | |
248 | "Search function passed to `find-tag-in-order' for finding a tag.") | |
249 | (defvar find-tag-tag-order nil | |
250 | "Tag order passed to `find-tag-in-order' for finding a tag.") | |
251 | (defvar find-tag-next-line-after-failure-p nil | |
252 | "Flag passed to `find-tag-in-order' for finding a tag.") | |
253 | (defvar list-tags-function nil | |
254 | "Function to do the work of `list-tags' (which see).") | |
255 | (defvar tags-apropos-function nil | |
256 | "Function to do the work of `tags-apropos' (which see).") | |
257 | (defvar tags-included-tables-function nil | |
258 | "Function to do the work of `tags-included-tables' (which see).") | |
259 | (defvar verify-tags-table-function nil | |
e7f767c2 | 260 | "Function to return t if current buffer contains valid tags file.") |
9708f7fc RM |
261 | \f |
262 | (defun initialize-new-tags-table () | |
cba9bdd2 RS |
263 | "Initialize the tags table in the current buffer. |
264 | Return non-nil if it is a valid tags table, and | |
265 | in that case, also make the tags table state variables | |
266 | buffer-local and set them to nil." | |
b6176f64 RM |
267 | (set (make-local-variable 'tags-table-files) nil) |
268 | (set (make-local-variable 'tags-completion-table) nil) | |
269 | (set (make-local-variable 'tags-included-tables) nil) | |
931f525c RS |
270 | ;; We used to initialize find-tag-marker-ring and tags-location-ring |
271 | ;; here, to new empty rings. But that is wrong, because those | |
272 | ;; are global. | |
273 | ||
9708f7fc | 274 | ;; Value is t if we have found a valid tags table buffer. |
d6b8c85b | 275 | (run-hook-with-args-until-success 'tags-table-format-functions)) |
ff1f0fa6 | 276 | |
0f518b6b JL |
277 | ;;;###autoload |
278 | (defun tags-table-mode () | |
279 | "Major mode for tags table file buffers." | |
280 | (interactive) | |
175069ef | 281 | (setq major-mode 'tags-table-mode ;FIXME: Use define-derived-mode. |
5ec19a11 | 282 | mode-name "Tags Table" |
8e004a44 | 283 | buffer-undo-list t) |
0f518b6b JL |
284 | (initialize-new-tags-table)) |
285 | ||
c086701a | 286 | ;;;###autoload |
9708f7fc RM |
287 | (defun visit-tags-table (file &optional local) |
288 | "Tell tags commands to use tags table file FILE. | |
ff1f0fa6 | 289 | FILE should be the name of a file created with the `etags' program. |
9708f7fc RM |
290 | A directory name is ok too; it means file TAGS in that directory. |
291 | ||
292 | Normally \\[visit-tags-table] sets the global value of `tags-file-name'. | |
293 | With a prefix arg, set the buffer-local value instead. | |
294 | When you find a tag with \\[find-tag], the buffer it finds the tag | |
295 | in is given a local value of this variable which is the name of the tags | |
296 | file the tag was in." | |
5b76833f | 297 | (interactive (list (read-file-name "Visit tags table (default TAGS): " |
ff1f0fa6 | 298 | default-directory |
9708f7fc RM |
299 | (expand-file-name "TAGS" |
300 | default-directory) | |
301 | t) | |
302 | current-prefix-arg)) | |
aab936ad RM |
303 | (or (stringp file) (signal 'wrong-type-argument (list 'stringp file))) |
304 | ;; Bind tags-file-name so we can control below whether the local or | |
dcaaec23 | 305 | ;; global value gets set. |
5e882a6a RS |
306 | ;; Calling visit-tags-table-buffer with tags-file-name set to FILE will |
307 | ;; initialize a buffer for FILE and set tags-file-name to the | |
b6176f64 | 308 | ;; fully-expanded name. |
9806213d RM |
309 | (let ((tags-file-name file)) |
310 | (save-excursion | |
aab936ad | 311 | (or (visit-tags-table-buffer file) |
9806213d RM |
312 | (signal 'file-error (list "Visiting tags table" |
313 | "file does not exist" | |
314 | file))) | |
b6176f64 | 315 | ;; Set FILE to the expanded name. |
9806213d | 316 | (setq file tags-file-name))) |
9708f7fc | 317 | (if local |
b6176f64 | 318 | ;; Set the local value of tags-file-name. |
47f3c459 | 319 | (set (make-local-variable 'tags-file-name) file) |
b6176f64 | 320 | ;; Set the global value of tags-file-name. |
9806213d RM |
321 | (setq-default tags-file-name file))) |
322 | ||
a3d358c6 RM |
323 | (defun tags-table-check-computed-list () |
324 | "Compute `tags-table-computed-list' from `tags-table-list' if necessary." | |
325 | (let ((expanded-list (mapcar 'tags-expand-table-name tags-table-list))) | |
326 | (or (equal tags-table-computed-list-for expanded-list) | |
327 | ;; The list (or default-directory) has changed since last computed. | |
328 | (let* ((compute-for (mapcar 'copy-sequence expanded-list)) | |
329 | (tables (copy-sequence compute-for)) ;Mutated in the loop. | |
330 | (computed nil) | |
331 | table-buffer) | |
332 | ||
333 | (while tables | |
334 | (setq computed (cons (car tables) computed) | |
335 | table-buffer (get-file-buffer (car tables))) | |
83287e5b | 336 | (if (and table-buffer |
c49a777a RM |
337 | ;; There is a buffer visiting the file. Now make sure |
338 | ;; it is initialized as a tag table buffer. | |
339 | (save-excursion | |
340 | (tags-verify-table (buffer-file-name table-buffer)))) | |
dcaaec23 | 341 | (with-current-buffer table-buffer |
a3d358c6 RM |
342 | (if (tags-included-tables) |
343 | ;; Insert the included tables into the list we | |
344 | ;; are processing. | |
b1c7e434 RM |
345 | (setcdr tables (nconc (mapcar 'tags-expand-table-name |
346 | (tags-included-tables)) | |
347 | (cdr tables))))) | |
a3d358c6 RM |
348 | ;; This table is not in core yet. Insert a placeholder |
349 | ;; saying we must read it into core to check for included | |
350 | ;; tables before searching the next table in the list. | |
351 | (setq computed (cons t computed))) | |
352 | (setq tables (cdr tables))) | |
353 | ||
354 | ;; Record the tags-table-list value (and the context of the | |
355 | ;; current directory) we computed from. | |
356 | (setq tags-table-computed-list-for compute-for | |
357 | tags-table-computed-list (nreverse computed)))))) | |
358 | ||
a3d358c6 | 359 | (defun tags-table-extend-computed-list () |
cba9bdd2 RS |
360 | "Extend `tags-table-computed-list' to remove the first t placeholder. |
361 | ||
362 | An element of the list that is t is a placeholder indicating that the | |
363 | preceding element is a table that has not been read in and might | |
364 | contain included tables to search. This function reads in the first | |
365 | such table and puts its included tables into the list." | |
a3d358c6 RM |
366 | (let ((list tags-table-computed-list)) |
367 | (while (not (eq (nth 1 list) t)) | |
368 | (setq list (cdr list))) | |
369 | (save-excursion | |
370 | (if (tags-verify-table (car list)) | |
371 | ;; We are now in the buffer visiting (car LIST). Extract its | |
372 | ;; list of included tables and insert it into the computed list. | |
373 | (let ((tables (tags-included-tables)) | |
374 | (computed nil) | |
375 | table-buffer) | |
376 | (while tables | |
377 | (setq computed (cons (car tables) computed) | |
378 | table-buffer (get-file-buffer (car tables))) | |
379 | (if table-buffer | |
dcaaec23 | 380 | (with-current-buffer table-buffer |
a3d358c6 RM |
381 | (if (tags-included-tables) |
382 | ;; Insert the included tables into the list we | |
383 | ;; are processing. | |
384 | (setcdr tables (append (tags-included-tables) | |
385 | tables)))) | |
386 | ;; This table is not in core yet. Insert a placeholder | |
387 | ;; saying we must read it into core to check for included | |
388 | ;; tables before searching the next table in the list. | |
e99045bb RM |
389 | (setq computed (cons t computed))) |
390 | (setq tables (cdr tables))) | |
a3d358c6 RM |
391 | (setq computed (nreverse computed)) |
392 | ;; COMPUTED now contains the list of included tables (and | |
393 | ;; tables included by them, etc.). Now splice this into the | |
394 | ;; current list. | |
395 | (setcdr list (nconc computed (cdr (cdr list))))) | |
396 | ;; It was not a valid table, so just remove the following placeholder. | |
397 | (setcdr list (cdr (cdr list))))))) | |
b6176f64 | 398 | |
47f3c459 | 399 | (defun tags-expand-table-name (file) |
cba9bdd2 | 400 | "Expand tags table name FILE into a complete file name." |
47f3c459 RM |
401 | (setq file (expand-file-name file)) |
402 | (if (file-directory-p file) | |
403 | (expand-file-name "TAGS" file) | |
404 | file)) | |
405 | ||
a3d358c6 RM |
406 | ;; Like member, but comparison is done after tags-expand-table-name on both |
407 | ;; sides and elements of LIST that are t are skipped. | |
408 | (defun tags-table-list-member (file list) | |
cba9bdd2 RS |
409 | "Like (member FILE LIST) after applying `tags-expand-table-name'. |
410 | More precisely, apply `tags-expand-table-name' to FILE | |
411 | and each element of LIST, returning the link whose car is the first match. | |
412 | If an element of LIST is t, ignore it." | |
47f3c459 | 413 | (setq file (tags-expand-table-name file)) |
a3d358c6 RM |
414 | (while (and list |
415 | (or (eq (car list) t) | |
416 | (not (string= file (tags-expand-table-name (car list)))))) | |
417 | (setq list (cdr list))) | |
47f3c459 RM |
418 | list) |
419 | ||
a3d358c6 RM |
420 | (defun tags-verify-table (file) |
421 | "Read FILE into a buffer and verify that it is a valid tags table. | |
422 | Sets the current buffer to one visiting FILE (if it exists). | |
e7f767c2 | 423 | Returns non-nil if it is a valid table." |
a3d358c6 RM |
424 | (if (get-file-buffer file) |
425 | ;; The file is already in a buffer. Check for the visited file | |
426 | ;; having changed since we last used it. | |
8c0bf8b3 | 427 | (progn |
a3d358c6 | 428 | (set-buffer (get-file-buffer file)) |
8c0bf8b3 | 429 | (or verify-tags-table-function (tags-table-mode)) |
a3d358c6 | 430 | (if (or (verify-visited-file-modtime (current-buffer)) |
350ce4cf RS |
431 | ;; Decide whether to revert the file. |
432 | ;; revert-without-query can say to revert | |
433 | ;; or the user can say to revert. | |
434 | (not (or (let ((tail revert-without-query) | |
435 | (found nil)) | |
436 | (while tail | |
437 | (if (string-match (car tail) buffer-file-name) | |
438 | (setq found t)) | |
439 | (setq tail (cdr tail))) | |
440 | found) | |
99783bde | 441 | tags-revert-without-query |
350ce4cf RS |
442 | (yes-or-no-p |
443 | (format "Tags file %s has changed, read new contents? " | |
444 | file))))) | |
445 | (and verify-tags-table-function | |
446 | (funcall verify-tags-table-function)) | |
a3d358c6 | 447 | (revert-buffer t t) |
0f518b6b | 448 | (tags-table-mode))) |
dcaaec23 SM |
449 | (when (file-exists-p file) |
450 | (let* ((buf (find-file-noselect file)) | |
451 | (newfile (buffer-file-name buf))) | |
452 | (unless (string= file newfile) | |
453 | ;; find-file-noselect has changed the file name. | |
454 | ;; Propagate the change to tags-file-name and tags-table-list. | |
455 | (let ((tail (member file tags-table-list))) | |
456 | (if tail (setcar tail newfile))) | |
457 | (if (eq file tags-file-name) (setq tags-file-name newfile))) | |
458 | ;; Only change buffer now that we're done using potentially | |
459 | ;; buffer-local variables. | |
460 | (set-buffer buf) | |
461 | (tags-table-mode))))) | |
a3d358c6 RM |
462 | |
463 | ;; Subroutine of visit-tags-table-buffer. Search the current tags tables | |
464 | ;; for one that has tags for THIS-FILE (or that includes a table that | |
c3dea9ba RM |
465 | ;; does). Return the name of the first table table listing THIS-FILE; if |
466 | ;; the table is one included by another table, it is the master table that | |
467 | ;; we return. If CORE-ONLY is non-nil, check only tags tables that are | |
468 | ;; already in buffers--don't visit any new files. | |
a3d358c6 | 469 | (defun tags-table-including (this-file core-only) |
cba9bdd2 RS |
470 | "Search current tags tables for tags for THIS-FILE. |
471 | Subroutine of `visit-tags-table-buffer'. | |
472 | Looks for a tags table that has such tags or that includes a table | |
473 | that has them. Returns the name of the first such table. | |
474 | Non-nil CORE-ONLY means check only tags tables that are already in | |
40b1a3a9 | 475 | buffers. If CORE-ONLY is nil, it is ignored." |
a3d358c6 | 476 | (let ((tables tags-table-computed-list) |
f06df563 | 477 | (found nil)) |
a3d358c6 | 478 | ;; Loop over the list, looking for a table containing tags for THIS-FILE. |
47f3c459 RM |
479 | (while (and (not found) |
480 | tables) | |
9d591df8 RM |
481 | |
482 | (if core-only | |
483 | ;; Skip tables not in core. | |
484 | (while (eq (nth 1 tables) t) | |
485 | (setq tables (cdr (cdr tables)))) | |
486 | (if (eq (nth 1 tables) t) | |
487 | ;; This table has not been read into core yet. Read it in now. | |
488 | (tags-table-extend-computed-list))) | |
a3d358c6 | 489 | |
3cc3f703 RM |
490 | (if tables |
491 | ;; Select the tags table buffer and get the file list up to date. | |
492 | (let ((tags-file-name (car tables))) | |
493 | (visit-tags-table-buffer 'same) | |
83287e5b RM |
494 | (if (member this-file (mapcar 'expand-file-name |
495 | (tags-table-files))) | |
3cc3f703 RM |
496 | ;; Found it. |
497 | (setq found tables)))) | |
47f3c459 | 498 | (setq tables (cdr tables))) |
3cc3f703 RM |
499 | (if found |
500 | ;; Now determine if the table we found was one included by another | |
82f75cca RM |
501 | ;; table, not explicitly listed. We do this by checking each |
502 | ;; element of the computed list to see if it appears in the user's | |
503 | ;; explicit list; the last element we will check is FOUND itself. | |
504 | ;; Then we return the last one which did in fact appear in | |
505 | ;; tags-table-list. | |
3cc3f703 RM |
506 | (let ((could-be nil) |
507 | (elt tags-table-computed-list)) | |
508 | (while (not (eq elt (cdr found))) | |
509 | (if (tags-table-list-member (car elt) tags-table-list) | |
510 | ;; This table appears in the user's list, so it could be | |
511 | ;; the one which includes the table we found. | |
82f75cca RM |
512 | (setq could-be (car elt))) |
513 | (setq elt (cdr elt)) | |
514 | (if (eq t (car elt)) | |
515 | (setq elt (cdr elt)))) | |
ec623f1b RM |
516 | ;; The last element we found in the computed list before FOUND |
517 | ;; that appears in the user's list will be the table that | |
83287e5b | 518 | ;; included the one we found. |
82f75cca | 519 | could-be)))) |
9708f7fc | 520 | |
a3d358c6 | 521 | (defun tags-next-table () |
cba9bdd2 RS |
522 | "Move `tags-table-list-pointer' along and set `tags-file-name'. |
523 | Subroutine of `visit-tags-table-buffer'.\ | |
524 | Returns nil when out of tables." | |
a3d358c6 RM |
525 | ;; If there is a placeholder element next, compute the list to replace it. |
526 | (while (eq (nth 1 tags-table-list-pointer) t) | |
527 | (tags-table-extend-computed-list)) | |
528 | ||
529 | ;; Go to the next table in the list. | |
530 | (setq tags-table-list-pointer (cdr tags-table-list-pointer)) | |
531 | (or tags-table-list-pointer | |
532 | ;; Wrap around. | |
533 | (setq tags-table-list-pointer tags-table-computed-list)) | |
534 | ||
535 | (if (eq tags-table-list-pointer tags-table-list-started-at) | |
536 | ;; We have come full circle. No more tables. | |
537 | (setq tags-table-list-pointer nil) | |
538 | ;; Set tags-file-name to the name from the list. It is already expanded. | |
539 | (setq tags-file-name (car tags-table-list-pointer)))) | |
540 | ||
97534f32 | 541 | ;;;###autoload |
9708f7fc RM |
542 | (defun visit-tags-table-buffer (&optional cont) |
543 | "Select the buffer containing the current tags table. | |
aab936ad | 544 | If optional arg is a string, visit that file as a tags table. |
9708f7fc | 545 | If optional arg is t, visit the next table in `tags-table-list'. |
9708f7fc | 546 | If optional arg is the atom `same', don't look for a new table; |
b6176f64 | 547 | just select the buffer visiting `tags-file-name'. |
47f3c459 | 548 | If arg is nil or absent, choose a first buffer from information in |
b6176f64 | 549 | `tags-file-name', `tags-table-list', `tags-table-list-pointer'. |
9708f7fc | 550 | Returns t if it visits a tags table, or nil if there are no more in the list." |
b6176f64 RM |
551 | |
552 | ;; Set tags-file-name to the tags table file we want to visit. | |
a3d358c6 RM |
553 | (cond ((eq cont 'same) |
554 | ;; Use the ambient value of tags-file-name. | |
555 | (or tags-file-name | |
b0b3cce2 KH |
556 | (error "%s" |
557 | (substitute-command-keys | |
4fa15f59 RS |
558 | (concat "No tags table in use; " |
559 | "use \\[visit-tags-table] to select one"))))) | |
a3d358c6 RM |
560 | |
561 | ((eq t cont) | |
562 | ;; Find the next table. | |
563 | (if (tags-next-table) | |
564 | ;; Skip over nonexistent files. | |
565 | (while (and (not (or (get-file-buffer tags-file-name) | |
566 | (file-exists-p tags-file-name))) | |
567 | (tags-next-table))))) | |
568 | ||
569 | (t | |
570 | ;; Pick a table out of our hat. | |
571 | (tags-table-check-computed-list) ;Get it up to date, we might use it. | |
572 | (setq tags-file-name | |
573 | (or | |
574 | ;; If passed a string, use that. | |
575 | (if (stringp cont) | |
576 | (prog1 cont | |
577 | (setq cont nil))) | |
578 | ;; First, try a local variable. | |
579 | (cdr (assq 'tags-file-name (buffer-local-variables))) | |
580 | ;; Second, try a user-specified function to guess. | |
581 | (and default-tags-table-function | |
582 | (funcall default-tags-table-function)) | |
583 | ;; Third, look for a tags table that contains tags for the | |
584 | ;; current buffer's file. If one is found, the lists will | |
585 | ;; be frobnicated, and CONT will be set non-nil so we don't | |
586 | ;; do it below. | |
587 | (and buffer-file-name | |
83287e5b | 588 | (or |
c3dea9ba RM |
589 | ;; First check only tables already in buffers. |
590 | (tags-table-including buffer-file-name t) | |
591 | ;; Since that didn't find any, now do the | |
592 | ;; expensive version: reading new files. | |
593 | (tags-table-including buffer-file-name nil))) | |
a3d358c6 RM |
594 | ;; Fourth, use the user variable tags-file-name, if it is |
595 | ;; not already in the current list. | |
596 | (and tags-file-name | |
597 | (not (tags-table-list-member tags-file-name | |
598 | tags-table-computed-list)) | |
599 | tags-file-name) | |
600 | ;; Fifth, use the user variable giving the table list. | |
601 | ;; Find the first element of the list that actually exists. | |
602 | (let ((list tags-table-list) | |
603 | file) | |
604 | (while (and list | |
605 | (setq file (tags-expand-table-name (car list))) | |
606 | (not (get-file-buffer file)) | |
607 | (not (file-exists-p file))) | |
608 | (setq list (cdr list))) | |
609 | (car list)) | |
610 | ;; Finally, prompt the user for a file name. | |
611 | (expand-file-name | |
5b76833f | 612 | (read-file-name "Visit tags table (default TAGS): " |
a3d358c6 RM |
613 | default-directory |
614 | "TAGS" | |
615 | t)))))) | |
616 | ||
617 | ;; Expand the table name into a full file name. | |
618 | (setq tags-file-name (tags-expand-table-name tags-file-name)) | |
619 | ||
7e7b42b2 | 620 | (unless (and (eq cont t) (null tags-table-list-pointer)) |
a3d358c6 | 621 | ;; Verify that tags-file-name names a valid tags table. |
229b7986 RM |
622 | ;; Bind another variable with the value of tags-file-name |
623 | ;; before we switch buffers, in case tags-file-name is buffer-local. | |
624 | (let ((curbuf (current-buffer)) | |
625 | (local-tags-file-name tags-file-name)) | |
626 | (if (tags-verify-table local-tags-file-name) | |
627 | ||
628 | ;; We have a valid tags table. | |
629 | (progn | |
630 | ;; Bury the tags table buffer so it | |
631 | ;; doesn't get in the user's way. | |
632 | (bury-buffer (current-buffer)) | |
633 | ||
634 | ;; If this was a new table selection (CONT is nil), make | |
635 | ;; sure tags-table-list includes the chosen table, and | |
636 | ;; update the list pointer variables. | |
637 | (or cont | |
638 | ;; Look in the list for the table we chose. | |
639 | (let ((found (tags-table-list-member | |
640 | local-tags-file-name | |
641 | tags-table-computed-list))) | |
642 | (if found | |
643 | ;; There it is. Just switch to it. | |
644 | (setq tags-table-list-pointer found | |
645 | tags-table-list-started-at found) | |
646 | ||
647 | ;; The table is not in the current set. | |
648 | ;; Try to find it in another previously used set. | |
649 | (let ((sets tags-table-set-list)) | |
650 | (while (and sets | |
651 | (not (tags-table-list-member | |
652 | local-tags-file-name | |
653 | (car sets)))) | |
654 | (setq sets (cdr sets))) | |
655 | (if sets | |
656 | ;; Found in some other set. Switch to that set. | |
657 | (progn | |
658 | (or (memq tags-table-list tags-table-set-list) | |
659 | ;; Save the current list. | |
660 | (setq tags-table-set-list | |
661 | (cons tags-table-list | |
662 | tags-table-set-list))) | |
663 | (setq tags-table-list (car sets))) | |
664 | ||
665 | ;; Not found in any existing set. | |
666 | (if (and tags-table-list | |
667 | (or (eq t tags-add-tables) | |
668 | (and tags-add-tables | |
669 | (y-or-n-p | |
670 | (concat "Keep current list of " | |
671 | "tags tables also? "))))) | |
672 | ;; Add it to the current list. | |
673 | (setq tags-table-list (cons local-tags-file-name | |
674 | tags-table-list)) | |
675 | ||
676 | ;; Make a fresh list, and store the old one. | |
677 | (message "Starting a new list of tags tables") | |
678 | (or (null tags-table-list) | |
679 | (memq tags-table-list tags-table-set-list) | |
f06df563 RM |
680 | (setq tags-table-set-list |
681 | (cons tags-table-list | |
682 | tags-table-set-list))) | |
dd2cedb9 DL |
683 | ;; Clear out buffers holding old tables. |
684 | (dolist (table tags-table-list) | |
cba9bdd2 | 685 | ;; The list can contain items t. |
84d51f9b DL |
686 | (if (stringp table) |
687 | (let ((buffer (find-buffer-visiting table))) | |
dd2cedb9 | 688 | (if buffer |
84d51f9b | 689 | (kill-buffer buffer))))) |
229b7986 RM |
690 | (setq tags-table-list (list local-tags-file-name)))) |
691 | ||
692 | ;; Recompute tags-table-computed-list. | |
693 | (tags-table-check-computed-list) | |
694 | ;; Set the tags table list state variables to start | |
695 | ;; over from tags-table-computed-list. | |
696 | (setq tags-table-list-started-at tags-table-computed-list | |
697 | tags-table-list-pointer | |
698 | tags-table-computed-list))))) | |
699 | ||
700 | ;; Return of t says the tags table is valid. | |
701 | t) | |
702 | ||
703 | ;; The buffer was not valid. Don't use it again. | |
704 | (set-buffer curbuf) | |
a3d358c6 | 705 | (kill-local-variable 'tags-file-name) |
229b7986 | 706 | (if (eq local-tags-file-name tags-file-name) |
e98cc0af | 707 | (setq tags-file-name nil)) |
229b7986 | 708 | (error "File %s is not a valid tags table" local-tags-file-name))))) |
c6987f0b RM |
709 | |
710 | (defun tags-reset-tags-tables () | |
b533f3c5 | 711 | "Reset tags state to cancel effect of any previous \\[visit-tags-table] or \\[find-tag]." |
c6987f0b | 712 | (interactive) |
466886a2 KH |
713 | ;; Clear out the markers we are throwing away. |
714 | (let ((i 0)) | |
715 | (while (< i find-tag-marker-ring-length) | |
716 | (if (aref (cddr tags-location-ring) i) | |
717 | (set-marker (aref (cddr tags-location-ring) i) nil)) | |
718 | (if (aref (cddr find-tag-marker-ring) i) | |
719 | (set-marker (aref (cddr find-tag-marker-ring) i) nil)) | |
720 | (setq i (1+ i)))) | |
c6987f0b | 721 | (setq tags-file-name nil |
466886a2 KH |
722 | tags-location-ring (make-ring find-tag-marker-ring-length) |
723 | find-tag-marker-ring (make-ring find-tag-marker-ring-length) | |
c6987f0b RM |
724 | tags-table-list nil |
725 | tags-table-computed-list nil | |
726 | tags-table-computed-list-for nil | |
727 | tags-table-list-pointer nil | |
728 | tags-table-list-started-at nil | |
729 | tags-table-set-list nil)) | |
a128c7a0 | 730 | \f |
79e01623 | 731 | (defun file-of-tag (&optional relative) |
ff1f0fa6 | 732 | "Return the file name of the file whose tags point is within. |
9708f7fc | 733 | Assumes the tags table is the current buffer. |
79e01623 JB |
734 | If RELATIVE is non-nil, file name returned is relative to tags |
735 | table file's directory. If RELATIVE is nil, file name returned | |
736 | is complete." | |
737 | (funcall file-of-tag-function relative)) | |
ff1f0fa6 | 738 | |
c086701a | 739 | ;;;###autoload |
9708f7fc RM |
740 | (defun tags-table-files () |
741 | "Return a list of files in the current tags table. | |
83287e5b RM |
742 | Assumes the tags table is the current buffer. The file names are returned |
743 | as they appeared in the `etags' command that created the table, usually | |
744 | without directory names." | |
a128c7a0 RM |
745 | (or tags-table-files |
746 | (setq tags-table-files | |
747 | (funcall tags-table-files-function)))) | |
9708f7fc RM |
748 | |
749 | (defun tags-included-tables () | |
b6176f64 RM |
750 | "Return a list of tags tables included by the current table. |
751 | Assumes the tags table is the current buffer." | |
9708f7fc RM |
752 | (or tags-included-tables |
753 | (setq tags-included-tables (funcall tags-included-tables-function)))) | |
754 | \f | |
9708f7fc | 755 | (defun tags-completion-table () |
cba9bdd2 RS |
756 | "Build `tags-completion-table' on demand. |
757 | The tags included in the completion table are those in the current | |
758 | tags table and its (recursively) included tags tables." | |
9708f7fc | 759 | (or tags-completion-table |
f37de644 | 760 | ;; No cached value for this buffer. |
9708f7fc | 761 | (condition-case () |
f37de644 FP |
762 | (let (current-table combined-table) |
763 | (message "Making tags completion table for %s..." buffer-file-name) | |
764 | (save-excursion | |
765 | ;; Iterate over the current list of tags tables. | |
766 | (while (visit-tags-table-buffer (and combined-table t)) | |
767 | ;; Find possible completions in this table. | |
768 | (setq current-table (funcall tags-completion-table-function)) | |
769 | ;; Merge this buffer's completions into the combined table. | |
770 | (if combined-table | |
771 | (mapatoms | |
772 | (lambda (sym) (intern (symbol-name sym) combined-table)) | |
773 | current-table) | |
774 | (setq combined-table current-table)))) | |
775 | (message "Making tags completion table for %s...done" | |
776 | buffer-file-name) | |
f0d732ae | 777 | ;; Cache the result in a buffer-local variable. |
f37de644 | 778 | (setq tags-completion-table combined-table)) |
9708f7fc RM |
779 | (quit (message "Tags completion table construction aborted.") |
780 | (setq tags-completion-table nil))))) | |
781 | ||
b5507bc1 SM |
782 | (defun tags-lazy-completion-table () |
783 | (lexical-let ((buf (current-buffer))) | |
784 | (lambda (string pred action) | |
785 | (with-current-buffer buf | |
786 | (save-excursion | |
787 | ;; If we need to ask for the tag table, allow that. | |
788 | (let ((enable-recursive-minibuffers t)) | |
789 | (visit-tags-table-buffer)) | |
790 | (complete-with-action action (tags-completion-table) string pred)))))) | |
8c0bf8b3 SM |
791 | |
792 | ;;;###autoload (defun tags-completion-at-point-function () | |
793 | ;;;###autoload (if (or tags-table-list tags-file-name) | |
794 | ;;;###autoload (progn | |
795 | ;;;###autoload (load "etags") | |
796 | ;;;###autoload (tags-completion-at-point-function)))) | |
797 | ||
798 | (defun tags-completion-at-point-function () | |
799 | "Using tags, return a completion table for the text around point. | |
800 | If no tags table is loaded, do nothing and return nil." | |
801 | (when (or tags-table-list tags-file-name) | |
802 | (let ((completion-ignore-case (if (memq tags-case-fold-search '(t nil)) | |
803 | tags-case-fold-search | |
804 | case-fold-search)) | |
805 | (pattern (funcall (or find-tag-default-function | |
806 | (get major-mode 'find-tag-default-function) | |
807 | 'find-tag-default))) | |
808 | beg) | |
809 | (when pattern | |
810 | (save-excursion | |
811 | (search-backward pattern) ;FIXME: will fail if we're inside pattern. | |
812 | (setq beg (point)) | |
813 | (forward-char (length pattern)) | |
814 | (list beg (point) (tags-lazy-completion-table))))))) | |
a128c7a0 | 815 | \f |
ff1f0fa6 | 816 | (defun find-tag-tag (string) |
cba9bdd2 | 817 | "Read a tag name, with defaulting and completion." |
8a294d90 FP |
818 | (let* ((completion-ignore-case (if (memq tags-case-fold-search '(t nil)) |
819 | tags-case-fold-search | |
820 | case-fold-search)) | |
821 | (default (funcall (or find-tag-default-function | |
9708f7fc RM |
822 | (get major-mode 'find-tag-default-function) |
823 | 'find-tag-default))) | |
824 | (spec (completing-read (if default | |
ebc6b37c SM |
825 | (format "%s (default %s): " |
826 | (substring string 0 (string-match "[ :]+\\'" string)) | |
827 | default) | |
9708f7fc | 828 | string) |
b5507bc1 | 829 | (tags-lazy-completion-table) |
ab685b6b | 830 | nil nil nil nil default))) |
b6176f64 RM |
831 | (if (equal spec "") |
832 | (or default (error "There is no default tag")) | |
833 | spec))) | |
ff1f0fa6 | 834 | |
21800cb8 RM |
835 | (defvar last-tag nil |
836 | "Last tag found by \\[find-tag].") | |
837 | ||
d74e816f | 838 | (defun find-tag-interactive (prompt &optional no-default) |
cba9bdd2 RS |
839 | "Get interactive arguments for tag functions. |
840 | The functions using this are `find-tag-noselect', | |
841 | `find-tag-other-window', and `find-tag-regexp'." | |
926861fb | 842 | (if (and current-prefix-arg last-tag) |
d74e816f RM |
843 | (list nil (if (< (prefix-numeric-value current-prefix-arg) 0) |
844 | '- | |
845 | t)) | |
846 | (list (if no-default | |
847 | (read-string prompt) | |
848 | (find-tag-tag prompt))))) | |
849 | ||
cba9bdd2 | 850 | (defvar find-tag-history nil) ; Doc string? |
c5507689 | 851 | |
dd2cedb9 | 852 | ;; Dynamic bondage: |
0d56ae89 GM |
853 | (defvar etags-case-fold-search) |
854 | (defvar etags-syntax-table) | |
dd2cedb9 | 855 | |
c086701a | 856 | ;;;###autoload |
9708f7fc RM |
857 | (defun find-tag-noselect (tagname &optional next-p regexp-p) |
858 | "Find tag (in current tags table) whose name contains TAGNAME. | |
f90a6155 | 859 | Returns the buffer containing the tag's definition and moves its point there, |
9708f7fc RM |
860 | but does not select the buffer. |
861 | The default for TAGNAME is the expression in the buffer near point. | |
862 | ||
d74e816f RM |
863 | If second arg NEXT-P is t (interactively, with prefix arg), search for |
864 | another tag that matches the last tagname or regexp used. When there are | |
865 | multiple matches for a tag, more exact matches are found first. If NEXT-P | |
866 | is the atom `-' (interactively, with prefix arg that is a negative number | |
867 | or just \\[negative-argument]), pop back to the previous tag gone to. | |
ff1f0fa6 | 868 | |
9708f7fc RM |
869 | If third arg REGEXP-P is non-nil, treat TAGNAME as a regexp. |
870 | ||
a70ea557 | 871 | A marker representing the point when this command is invoked is pushed |
b533f3c5 RS |
872 | onto a ring and may be popped back to with \\[pop-tag-mark]. |
873 | Contrast this with the ring of marks gone to by the command. | |
874 | ||
9708f7fc | 875 | See documentation of variable `tags-file-name'." |
d74e816f RM |
876 | (interactive (find-tag-interactive "Find tag: ")) |
877 | ||
c5507689 | 878 | (setq find-tag-history (cons tagname find-tag-history)) |
e1cf67b6 GM |
879 | ;; Save the current buffer's value of `find-tag-hook' before |
880 | ;; selecting the tags table buffer. For the same reason, save value | |
881 | ;; of `tags-file-name' in case it has a buffer-local value. | |
dc0274bd | 882 | (let ((local-find-tag-hook find-tag-hook)) |
d74e816f RM |
883 | (if (eq '- next-p) |
884 | ;; Pop back to a previous location. | |
b533f3c5 | 885 | (if (ring-empty-p tags-location-ring) |
d74e816f | 886 | (error "No previous tag locations") |
b533f3c5 | 887 | (let ((marker (ring-remove tags-location-ring 0))) |
d74e816f RM |
888 | (prog1 |
889 | ;; Move to the saved location. | |
b533f3c5 RS |
890 | (set-buffer (or (marker-buffer marker) |
891 | (error "The marked buffer has been deleted"))) | |
d74e816f | 892 | (goto-char (marker-position marker)) |
eb8c3be9 | 893 | ;; Kill that marker so it doesn't slow down editing. |
d74e816f RM |
894 | (set-marker marker nil nil) |
895 | ;; Run the user's hook. Do we really want to do this for pop? | |
896 | (run-hooks 'local-find-tag-hook)))) | |
b533f3c5 RS |
897 | ;; Record whence we came. |
898 | (ring-insert find-tag-marker-ring (point-marker)) | |
926861fb | 899 | (if (and next-p last-tag) |
d74e816f RM |
900 | ;; Find the same table we last used. |
901 | (visit-tags-table-buffer 'same) | |
902 | ;; Pick a table to use. | |
903 | (visit-tags-table-buffer) | |
904 | ;; Record TAGNAME for a future call with NEXT-P non-nil. | |
905 | (setq last-tag tagname)) | |
4cc32db6 RS |
906 | ;; Record the location so we can pop back to it later. |
907 | (let ((marker (make-marker))) | |
dcaaec23 SM |
908 | (with-current-buffer |
909 | ;; find-tag-in-order does the real work. | |
910 | (find-tag-in-order | |
911 | (if (and next-p last-tag) last-tag tagname) | |
912 | (if regexp-p | |
913 | find-tag-regexp-search-function | |
914 | find-tag-search-function) | |
915 | (if regexp-p | |
916 | find-tag-regexp-tag-order | |
917 | find-tag-tag-order) | |
918 | (if regexp-p | |
919 | find-tag-regexp-next-line-after-failure-p | |
920 | find-tag-next-line-after-failure-p) | |
921 | (if regexp-p "matching" "containing") | |
922 | (or (not next-p) (not last-tag))) | |
4cc32db6 RS |
923 | (set-marker marker (point)) |
924 | (run-hooks 'local-find-tag-hook) | |
b533f3c5 | 925 | (ring-insert tags-location-ring marker) |
4cc32db6 | 926 | (current-buffer)))))) |
ff1f0fa6 | 927 | |
c086701a | 928 | ;;;###autoload |
d74e816f | 929 | (defun find-tag (tagname &optional next-p regexp-p) |
9708f7fc RM |
930 | "Find tag (in current tags table) whose name contains TAGNAME. |
931 | Select the buffer containing the tag's definition, and move point there. | |
932 | The default for TAGNAME is the expression in the buffer around or before point. | |
c086701a | 933 | |
d74e816f RM |
934 | If second arg NEXT-P is t (interactively, with prefix arg), search for |
935 | another tag that matches the last tagname or regexp used. When there are | |
936 | multiple matches for a tag, more exact matches are found first. If NEXT-P | |
937 | is the atom `-' (interactively, with prefix arg that is a negative number | |
938 | or just \\[negative-argument]), pop back to the previous tag gone to. | |
ff1f0fa6 | 939 | |
b533f3c5 RS |
940 | If third arg REGEXP-P is non-nil, treat TAGNAME as a regexp. |
941 | ||
a70ea557 | 942 | A marker representing the point when this command is invoked is pushed |
b533f3c5 RS |
943 | onto a ring and may be popped back to with \\[pop-tag-mark]. |
944 | Contrast this with the ring of marks gone to by the command. | |
945 | ||
9708f7fc | 946 | See documentation of variable `tags-file-name'." |
d74e816f | 947 | (interactive (find-tag-interactive "Find tag: ")) |
ebc6b37c SM |
948 | (let* ((buf (find-tag-noselect tagname next-p regexp-p)) |
949 | (pos (with-current-buffer buf (point)))) | |
6010664f SM |
950 | (condition-case nil |
951 | (switch-to-buffer buf) | |
ebc6b37c SM |
952 | (error (pop-to-buffer buf))) |
953 | (goto-char pos))) | |
9708f7fc | 954 | ;;;###autoload (define-key esc-map "." 'find-tag) |
ff1f0fa6 | 955 | |
daa37602 | 956 | ;;;###autoload |
d74e816f | 957 | (defun find-tag-other-window (tagname &optional next-p regexp-p) |
9708f7fc | 958 | "Find tag (in current tags table) whose name contains TAGNAME. |
d74e816f RM |
959 | Select the buffer containing the tag's definition in another window, and |
960 | move point there. The default for TAGNAME is the expression in the buffer | |
961 | around or before point. | |
9708f7fc | 962 | |
d74e816f RM |
963 | If second arg NEXT-P is t (interactively, with prefix arg), search for |
964 | another tag that matches the last tagname or regexp used. When there are | |
965 | multiple matches for a tag, more exact matches are found first. If NEXT-P | |
966 | is negative (interactively, with prefix arg that is a negative number or | |
967 | just \\[negative-argument]), pop back to the previous tag gone to. | |
9708f7fc | 968 | |
b533f3c5 RS |
969 | If third arg REGEXP-P is non-nil, treat TAGNAME as a regexp. |
970 | ||
a70ea557 | 971 | A marker representing the point when this command is invoked is pushed |
b533f3c5 RS |
972 | onto a ring and may be popped back to with \\[pop-tag-mark]. |
973 | Contrast this with the ring of marks gone to by the command. | |
974 | ||
9708f7fc | 975 | See documentation of variable `tags-file-name'." |
d74e816f RM |
976 | (interactive (find-tag-interactive "Find tag other window: ")) |
977 | ||
b6176f64 RM |
978 | ;; This hair is to deal with the case where the tag is found in the |
979 | ;; selected window's buffer; without the hair, point is moved in both | |
980 | ;; windows. To prevent this, we save the selected window's point before | |
981 | ;; doing find-tag-noselect, and restore it after. | |
982 | (let* ((window-point (window-point (selected-window))) | |
d74e816f | 983 | (tagbuf (find-tag-noselect tagname next-p regexp-p)) |
49693298 | 984 | (tagpoint (progn (set-buffer tagbuf) (point)))) |
b6176f64 RM |
985 | (set-window-point (prog1 |
986 | (selected-window) | |
49693298 JB |
987 | (switch-to-buffer-other-window tagbuf) |
988 | ;; We have to set this new window's point; it | |
989 | ;; might already have been displaying a | |
990 | ;; different portion of tagbuf, in which case | |
991 | ;; switch-to-buffer-other-window doesn't set | |
992 | ;; the window's point from the buffer. | |
993 | (set-window-point (selected-window) tagpoint)) | |
b6176f64 | 994 | window-point))) |
9708f7fc RM |
995 | ;;;###autoload (define-key ctl-x-4-map "." 'find-tag-other-window) |
996 | ||
29add8b9 | 997 | ;;;###autoload |
9708f7fc | 998 | (defun find-tag-other-frame (tagname &optional next-p) |
d74e816f RM |
999 | "Find tag (in current tags table) whose name contains TAGNAME. |
1000 | Select the buffer containing the tag's definition in another frame, and | |
1001 | move point there. The default for TAGNAME is the expression in the buffer | |
1002 | around or before point. | |
1003 | ||
1004 | If second arg NEXT-P is t (interactively, with prefix arg), search for | |
1005 | another tag that matches the last tagname or regexp used. When there are | |
1006 | multiple matches for a tag, more exact matches are found first. If NEXT-P | |
1007 | is negative (interactively, with prefix arg that is a negative number or | |
1008 | just \\[negative-argument]), pop back to the previous tag gone to. | |
daa37602 | 1009 | |
b533f3c5 RS |
1010 | If third arg REGEXP-P is non-nil, treat TAGNAME as a regexp. |
1011 | ||
a70ea557 | 1012 | A marker representing the point when this command is invoked is pushed |
b533f3c5 RS |
1013 | onto a ring and may be popped back to with \\[pop-tag-mark]. |
1014 | Contrast this with the ring of marks gone to by the command. | |
1015 | ||
9708f7fc | 1016 | See documentation of variable `tags-file-name'." |
d74e816f | 1017 | (interactive (find-tag-interactive "Find tag other frame: ")) |
9708f7fc RM |
1018 | (let ((pop-up-frames t)) |
1019 | (find-tag-other-window tagname next-p))) | |
1020 | ;;;###autoload (define-key ctl-x-5-map "." 'find-tag-other-frame) | |
1021 | ||
daa37602 | 1022 | ;;;###autoload |
9708f7fc RM |
1023 | (defun find-tag-regexp (regexp &optional next-p other-window) |
1024 | "Find tag (in current tags table) whose name matches REGEXP. | |
1025 | Select the buffer containing the tag's definition and move point there. | |
daa37602 | 1026 | |
d74e816f RM |
1027 | If second arg NEXT-P is t (interactively, with prefix arg), search for |
1028 | another tag that matches the last tagname or regexp used. When there are | |
1029 | multiple matches for a tag, more exact matches are found first. If NEXT-P | |
1030 | is negative (interactively, with prefix arg that is a negative number or | |
1031 | just \\[negative-argument]), pop back to the previous tag gone to. | |
9708f7fc RM |
1032 | |
1033 | If third arg OTHER-WINDOW is non-nil, select the buffer in another window. | |
1034 | ||
a70ea557 | 1035 | A marker representing the point when this command is invoked is pushed |
b533f3c5 RS |
1036 | onto a ring and may be popped back to with \\[pop-tag-mark]. |
1037 | Contrast this with the ring of marks gone to by the command. | |
1038 | ||
9708f7fc | 1039 | See documentation of variable `tags-file-name'." |
d74e816f RM |
1040 | (interactive (find-tag-interactive "Find tag regexp: " t)) |
1041 | ;; We go through find-tag-other-window to do all the display hair there. | |
1042 | (funcall (if other-window 'find-tag-other-window 'find-tag) | |
1043 | regexp next-p t)) | |
a6125773 | 1044 | ;;;###autoload (define-key esc-map [?\C-.] 'find-tag-regexp) |
b533f3c5 RS |
1045 | |
1046 | ;;;###autoload (define-key esc-map "*" 'pop-tag-mark) | |
1047 | ||
1048 | ;;;###autoload | |
1049 | (defun pop-tag-mark () | |
1050 | "Pop back to where \\[find-tag] was last invoked. | |
1051 | ||
1052 | This is distinct from invoking \\[find-tag] with a negative argument | |
1053 | since that pops a stack of markers at which tags were found, not from | |
1054 | where they were found." | |
1055 | (interactive) | |
1056 | (if (ring-empty-p find-tag-marker-ring) | |
1057 | (error "No previous locations for find-tag invocation")) | |
1058 | (let ((marker (ring-remove find-tag-marker-ring 0))) | |
1059 | (switch-to-buffer (or (marker-buffer marker) | |
1060 | (error "The marked buffer has been deleted"))) | |
1061 | (goto-char (marker-position marker)) | |
1062 | (set-marker marker nil nil))) | |
9708f7fc | 1063 | \f |
cba9bdd2 RS |
1064 | (defvar tag-lines-already-matched nil |
1065 | "Matches remembered between calls.") ; Doc string: calls to what? | |
b7089f3c | 1066 | |
f90a6155 JB |
1067 | (defun find-tag-in-order (pattern |
1068 | search-forward-func | |
1069 | order | |
1070 | next-line-after-failure-p | |
1071 | matching | |
1072 | first-search) | |
cba9bdd2 RS |
1073 | "Internal tag-finding function. |
1074 | PATTERN is a string to pass to arg SEARCH-FORWARD-FUNC, and to any | |
1075 | member of the function list ORDER. If ORDER is nil, use saved state | |
1076 | to continue a previous search. | |
1077 | ||
1078 | Arg NEXT-LINE-AFTER-FAILURE-P is non-nil if after a failed match, | |
1079 | point should be moved to the next line. | |
1080 | ||
1081 | Arg MATCHING is a string, an English `-ing' word, to be used in an | |
1082 | error message." | |
1083 | ;; Algorithm is as follows: | |
1084 | ;; For each qualifier-func in ORDER, go to beginning of tags file, and | |
1085 | ;; perform inner loop: for each naive match for PATTERN found using | |
1086 | ;; SEARCH-FORWARD-FUNC, qualify the naive match using qualifier-func. If | |
1087 | ;; it qualifies, go to the specified line in the specified source file | |
1088 | ;; and return. Qualified matches are remembered to avoid repetition. | |
1089 | ;; State is saved so that the loop can be continued. | |
9708f7fc RM |
1090 | (let (file ;name of file containing tag |
1091 | tag-info ;where to find the tag in FILE | |
9708f7fc RM |
1092 | (first-table t) |
1093 | (tag-order order) | |
b7089f3c | 1094 | (match-marker (make-marker)) |
9708f7fc | 1095 | goto-func |
ece6e35a GM |
1096 | (case-fold-search (if (memq tags-case-fold-search '(nil t)) |
1097 | tags-case-fold-search | |
1098 | case-fold-search)) | |
9708f7fc RM |
1099 | ) |
1100 | (save-excursion | |
b7089f3c RM |
1101 | |
1102 | (if first-search | |
1103 | ;; This is the start of a search for a fresh tag. | |
1104 | ;; Clear the list of tags matched by the previous search. | |
1105 | ;; find-tag-noselect has already put us in the first tags table | |
1106 | ;; buffer before we got called. | |
1107 | (setq tag-lines-already-matched nil) | |
1108 | ;; Continuing to search for the tag specified last time. | |
1109 | ;; tag-lines-already-matched lists locations matched in previous | |
1110 | ;; calls so we don't visit the same tag twice if it matches twice | |
1111 | ;; during two passes with different qualification predicates. | |
1112 | ;; Switch to the current tags table buffer. | |
1113 | (visit-tags-table-buffer 'same)) | |
47f3c459 | 1114 | |
9708f7fc | 1115 | ;; Get a qualified match. |
83287e5b | 1116 | (catch 'qualified-match-found |
47f3c459 | 1117 | |
b6176f64 | 1118 | ;; Iterate over the list of tags tables. |
9708f7fc RM |
1119 | (while (or first-table |
1120 | (visit-tags-table-buffer t)) | |
1121 | ||
6218e8c6 RM |
1122 | (and first-search first-table |
1123 | ;; Start at beginning of tags file. | |
1124 | (goto-char (point-min))) | |
5e882a6a | 1125 | |
6218e8c6 | 1126 | (setq first-table nil) |
9708f7fc | 1127 | |
b6176f64 | 1128 | ;; Iterate over the list of ordering predicates. |
9708f7fc RM |
1129 | (while order |
1130 | (while (funcall search-forward-func pattern nil t) | |
1131 | ;; Naive match found. Qualify the match. | |
1132 | (and (funcall (car order) pattern) | |
1133 | ;; Make sure it is not a previous qualified match. | |
9b026d9f | 1134 | (not (member (set-marker match-marker (point-at-bol)) |
b7089f3c | 1135 | tag-lines-already-matched)) |
9708f7fc RM |
1136 | (throw 'qualified-match-found nil)) |
1137 | (if next-line-after-failure-p | |
1138 | (forward-line 1))) | |
1139 | ;; Try the next flavor of match. | |
1140 | (setq order (cdr order)) | |
1141 | (goto-char (point-min))) | |
1142 | (setq order tag-order)) | |
1143 | ;; We throw out on match, so only get here if there were no matches. | |
b7089f3c RM |
1144 | ;; Clear out the markers we use to avoid duplicate matches so they |
1145 | ;; don't slow down editting and are immediately available for GC. | |
1146 | (while tag-lines-already-matched | |
1147 | (set-marker (car tag-lines-already-matched) nil nil) | |
1148 | (setq tag-lines-already-matched (cdr tag-lines-already-matched))) | |
1149 | (set-marker match-marker nil nil) | |
9708f7fc | 1150 | (error "No %stags %s %s" (if first-search "" "more ") |
83287e5b RM |
1151 | matching pattern)) |
1152 | ||
9708f7fc RM |
1153 | ;; Found a tag; extract location info. |
1154 | (beginning-of-line) | |
b7089f3c | 1155 | (setq tag-lines-already-matched (cons match-marker |
9708f7fc RM |
1156 | tag-lines-already-matched)) |
1157 | ;; Expand the filename, using the tags table buffer's default-directory. | |
fb7775eb | 1158 | ;; We should be able to search for file-name backwards in file-of-tag: |
ddc76b00 | 1159 | ;; the beginning-of-line is ok except when positioned on a "file-name" tag. |
fb7775eb | 1160 | (setq file (expand-file-name |
ddc76b00 FP |
1161 | (if (memq (car order) '(tag-exact-file-name-match-p |
1162 | tag-file-name-match-p | |
1163 | tag-partial-file-name-match-p)) | |
7caf6803 | 1164 | (save-excursion (forward-line 1) |
fb7775eb GM |
1165 | (file-of-tag)) |
1166 | (file-of-tag))) | |
9708f7fc RM |
1167 | tag-info (funcall snarf-tag-function)) |
1168 | ||
b6176f64 | 1169 | ;; Get the local value in the tags table buffer before switching buffers. |
9708f7fc | 1170 | (setq goto-func goto-tag-location-function) |
84406262 | 1171 | (tag-find-file-of-tag-noselect file) |
9708f7fc RM |
1172 | (widen) |
1173 | (push-mark) | |
83287e5b RM |
1174 | (funcall goto-func tag-info) |
1175 | ||
9708f7fc RM |
1176 | ;; Return the buffer where the tag was found. |
1177 | (current-buffer)))) | |
79e01623 | 1178 | |
84406262 | 1179 | (defun tag-find-file-of-tag-noselect (file) |
cba9bdd2 RS |
1180 | "Find the right line in the specified FILE." |
1181 | ;; If interested in compressed-files, search files with extensions. | |
1182 | ;; Otherwise, search only the real file. | |
79e01623 JB |
1183 | (let* ((buffer-search-extensions (if (featurep 'jka-compr) |
1184 | tags-compression-info-list | |
1185 | '(""))) | |
1186 | the-buffer | |
1187 | (file-search-extensions buffer-search-extensions)) | |
1188 | ;; search a buffer visiting the file with each possible extension | |
1189 | ;; Note: there is a small inefficiency in find-buffer-visiting : | |
1190 | ;; truename is computed even if not needed. Not too sure about this | |
1191 | ;; but I suspect truename computation accesses the disk. | |
1192 | ;; It is maybe a good idea to optimise this find-buffer-visiting. | |
1193 | ;; An alternative would be to use only get-file-buffer | |
1194 | ;; but this looks less "sure" to find the buffer for the file. | |
1195 | (while (and (not the-buffer) buffer-search-extensions) | |
1196 | (setq the-buffer (find-buffer-visiting (concat file (car buffer-search-extensions)))) | |
1197 | (setq buffer-search-extensions (cdr buffer-search-extensions))) | |
1198 | ;; if found a buffer but file modified, ensure we re-read ! | |
1199 | (if (and the-buffer (not (verify-visited-file-modtime the-buffer))) | |
1200 | (find-file-noselect (buffer-file-name the-buffer))) | |
1201 | ;; if no buffer found, search for files with possible extensions on disk | |
1202 | (while (and (not the-buffer) file-search-extensions) | |
1203 | (if (not (file-exists-p (concat file (car file-search-extensions)))) | |
1204 | (setq file-search-extensions (cdr file-search-extensions)) | |
1205 | (setq the-buffer (find-file-noselect (concat file (car file-search-extensions)))))) | |
1206 | (if (not the-buffer) | |
1207 | (if (featurep 'jka-compr) | |
1208 | (error "File %s (with or without extensions %s) not found" file tags-compression-info-list) | |
1209 | (error "File %s not found" file)) | |
1210 | (set-buffer the-buffer)))) | |
1211 | ||
cba9bdd2 | 1212 | (defun tag-find-file-of-tag (file) ; Doc string? |
84406262 | 1213 | (let ((buf (tag-find-file-of-tag-noselect file))) |
79e01623 JB |
1214 | (condition-case nil |
1215 | (switch-to-buffer buf) | |
1216 | (error (pop-to-buffer buf))))) | |
9708f7fc RM |
1217 | \f |
1218 | ;; `etags' TAGS file format support. | |
1219 | ||
1220 | (defun etags-recognize-tags-table () | |
cba9bdd2 RS |
1221 | "If `etags-verify-tags-table', make buffer-local format variables. |
1222 | If current buffer is a valid etags TAGS file, then give it | |
1223 | buffer-local values of tags table format variables." | |
b6176f64 | 1224 | (and (etags-verify-tags-table) |
9508896e JB |
1225 | ;; It is annoying to flash messages on the screen briefly, |
1226 | ;; and this message is not useful. -- rms | |
1227 | ;; (message "%s is an `etags' TAGS file" buffer-file-name) | |
dd2cedb9 DL |
1228 | (mapc (lambda (elt) (set (make-local-variable (car elt)) (cdr elt))) |
1229 | '((file-of-tag-function . etags-file-of-tag) | |
1230 | (tags-table-files-function . etags-tags-table-files) | |
1231 | (tags-completion-table-function . etags-tags-completion-table) | |
1232 | (snarf-tag-function . etags-snarf-tag) | |
1233 | (goto-tag-location-function . etags-goto-tag-location) | |
1234 | (find-tag-regexp-search-function . re-search-forward) | |
1235 | (find-tag-regexp-tag-order . (tag-re-match-p)) | |
1236 | (find-tag-regexp-next-line-after-failure-p . t) | |
1237 | (find-tag-search-function . search-forward) | |
1238 | (find-tag-tag-order . (tag-exact-file-name-match-p | |
ddc76b00 | 1239 | tag-file-name-match-p |
dd2cedb9 | 1240 | tag-exact-match-p |
d30ffe0e | 1241 | tag-implicit-name-match-p |
dd2cedb9 DL |
1242 | tag-symbol-match-p |
1243 | tag-word-match-p | |
fb7775eb | 1244 | tag-partial-file-name-match-p |
dd2cedb9 DL |
1245 | tag-any-match-p)) |
1246 | (find-tag-next-line-after-failure-p . nil) | |
1247 | (list-tags-function . etags-list-tags) | |
1248 | (tags-apropos-function . etags-tags-apropos) | |
1249 | (tags-included-tables-function . etags-tags-included-tables) | |
1250 | (verify-tags-table-function . etags-verify-tags-table) | |
1251 | )))) | |
9708f7fc RM |
1252 | |
1253 | (defun etags-verify-tags-table () | |
e7f767c2 | 1254 | "Return non-nil if the current buffer is a valid etags TAGS file." |
e4fc4f58 | 1255 | ;; Use eq instead of = in case char-after returns nil. |
a1906d51 | 1256 | (eq (char-after (point-min)) ?\f)) |
9708f7fc | 1257 | |
cba9bdd2 | 1258 | (defun etags-file-of-tag (&optional relative) ; Doc string? |
9708f7fc | 1259 | (save-excursion |
5e0b7560 | 1260 | (re-search-backward "\f\n\\([^\n]+\\),[0-9]*\n") |
79e01623 JB |
1261 | (let ((str (buffer-substring (match-beginning 1) (match-end 1)))) |
1262 | (if relative | |
1263 | str | |
1264 | (expand-file-name str | |
1265 | (file-truename default-directory)))))) | |
9708f7fc | 1266 | |
aa27fbb4 | 1267 | |
cba9bdd2 | 1268 | (defun etags-tags-completion-table () ; Doc string? |
46de1c5a | 1269 | (let ((table (make-vector 511 0)) |
4f124fb5 EZ |
1270 | (progress-reporter |
1271 | (make-progress-reporter | |
1272 | (format "Making tags completion table for %s..." buffer-file-name) | |
1273 | (point-min) (point-max)))) | |
9708f7fc RM |
1274 | (save-excursion |
1275 | (goto-char (point-min)) | |
4a92b718 RM |
1276 | ;; This monster regexp matches an etags tag line. |
1277 | ;; \1 is the string to match; | |
1278 | ;; \2 is not interesting; | |
1279 | ;; \3 is the guessed tag name; XXX guess should be better eg DEFUN | |
eb6a920f RM |
1280 | ;; \4 is not interesting; |
1281 | ;; \5 is the explicitly-specified tag name. | |
1282 | ;; \6 is the line to start searching at; | |
1283 | ;; \7 is the char to start searching at. | |
4a92b718 | 1284 | (while (re-search-forward |
a7885816 | 1285 | "^\\(\\([^\177]+[^-a-zA-Z0-9_+*$:\177]+\\)?\ |
7e7b42b2 GM |
1286 | \\([-a-zA-Z0-9_+*$?:]+\\)[^-a-zA-Z0-9_+*$?:\177]*\\)\177\ |
1287 | \\(\\([^\n\001]+\\)\001\\)?\\([0-9]+\\)?,\\([0-9]+\\)?\n" | |
4a92b718 | 1288 | nil t) |
46de1c5a MY |
1289 | (intern (prog1 (if (match-beginning 5) |
1290 | ;; There is an explicit tag name. | |
1291 | (buffer-substring (match-beginning 5) (match-end 5)) | |
1292 | ;; No explicit tag name. Best guess. | |
1293 | (buffer-substring (match-beginning 3) (match-end 3))) | |
4f124fb5 | 1294 | (progress-reporter-update progress-reporter (point))) |
4a92b718 | 1295 | table))) |
9708f7fc RM |
1296 | table)) |
1297 | ||
cba9bdd2 | 1298 | (defun etags-snarf-tag (&optional use-explicit) ; Doc string? |
79e01623 | 1299 | (let (tag-text line startpos explicit-start) |
83287e5b RM |
1300 | (if (save-excursion |
1301 | (forward-line -1) | |
1302 | (looking-at "\f\n")) | |
1303 | ;; The match was for a source file name, not any tag within a file. | |
1304 | ;; Give text of t, meaning to go exactly to the location we specify, | |
1305 | ;; the beginning of the file. | |
1306 | (setq tag-text t | |
1307 | line nil | |
a1906d51 | 1308 | startpos (point-min)) |
83287e5b RM |
1309 | |
1310 | ;; Find the end of the tag and record the whole tag text. | |
1311 | (search-forward "\177") | |
9b026d9f | 1312 | (setq tag-text (buffer-substring (1- (point)) (point-at-bol))) |
79e01623 JB |
1313 | ;; If use-explicit is non nil and explicit tag is present, use it as part of |
1314 | ;; return value. Else just skip it. | |
1315 | (setq explicit-start (point)) | |
9b026d9f | 1316 | (when (and (search-forward "\001" (point-at-bol 2) t) |
79e01623 JB |
1317 | use-explicit) |
1318 | (setq tag-text (buffer-substring explicit-start (1- (point))))) | |
1319 | ||
1320 | ||
83287e5b | 1321 | (if (looking-at "[0-9]") |
027a4b6b JB |
1322 | (setq line (string-to-number (buffer-substring |
1323 | (point) | |
1324 | (progn (skip-chars-forward "0-9") | |
1325 | (point)))))) | |
83287e5b RM |
1326 | (search-forward ",") |
1327 | (if (looking-at "[0-9]") | |
027a4b6b JB |
1328 | (setq startpos (string-to-number (buffer-substring |
1329 | (point) | |
1330 | (progn (skip-chars-forward "0-9") | |
1331 | (point))))))) | |
9708f7fc RM |
1332 | ;; Leave point on the next line of the tags file. |
1333 | (forward-line 1) | |
e1dec509 RM |
1334 | (cons tag-text (cons line startpos)))) |
1335 | ||
9708f7fc | 1336 | (defun etags-goto-tag-location (tag-info) |
cba9bdd2 RS |
1337 | "Go to location of tag specified by TAG-INFO. |
1338 | TAG-INFO is a cons (TEXT LINE . POSITION). | |
1339 | TEXT is the initial part of a line containing the tag. | |
1340 | LINE is the line number. | |
1341 | POSITION is the (one-based) char position of TEXT within the file. | |
1342 | ||
1343 | If TEXT is t, it means the tag refers to exactly LINE or POSITION, | |
1344 | whichever is present, LINE having preference, no searching. | |
1345 | Either LINE or POSITION can be nil. POSITION is used if present. | |
1346 | ||
1347 | If the tag isn't exactly at the given position, then look near that | |
1348 | position using a search window that expands progressively until it | |
1349 | hits the start of file." | |
e1dec509 | 1350 | (let ((startpos (cdr (cdr tag-info))) |
a0f09378 | 1351 | (line (car (cdr tag-info))) |
83287e5b RM |
1352 | offset found pat) |
1353 | (if (eq (car tag-info) t) | |
1354 | ;; Direct file tag. | |
d80619fa GM |
1355 | (cond (line (progn (goto-char (point-min)) |
1356 | (forward-line (1- line)))) | |
a0f09378 | 1357 | (startpos (goto-char startpos)) |
83287e5b RM |
1358 | (t (error "etags.el BUG: bogus direct file tag"))) |
1359 | ;; This constant is 1/2 the initial search window. | |
1360 | ;; There is no sense in making it too small, | |
1361 | ;; since just going around the loop once probably | |
1362 | ;; costs about as much as searching 2000 chars. | |
1363 | (setq offset 1000 | |
1364 | found nil | |
1365 | pat (concat (if (eq selective-display t) | |
1366 | "\\(^\\|\^m\\)" "^") | |
1367 | (regexp-quote (car tag-info)))) | |
1368 | ;; The character position in the tags table is 0-origin. | |
1369 | ;; Convert it to a 1-origin Emacs character position. | |
1370 | (if startpos (setq startpos (1+ startpos))) | |
1371 | ;; If no char pos was given, try the given line number. | |
1372 | (or startpos | |
a0f09378 | 1373 | (if line |
d80619fa GM |
1374 | (setq startpos (progn (goto-char (point-min)) |
1375 | (forward-line (1- line)) | |
83287e5b RM |
1376 | (point))))) |
1377 | (or startpos | |
1378 | (setq startpos (point-min))) | |
1379 | ;; First see if the tag is right at the specified location. | |
1380 | (goto-char startpos) | |
1381 | (setq found (looking-at pat)) | |
1382 | (while (and (not found) | |
1383 | (progn | |
1384 | (goto-char (- startpos offset)) | |
1385 | (not (bobp)))) | |
1386 | (setq found | |
1387 | (re-search-forward pat (+ startpos offset) t) | |
1388 | offset (* 3 offset))) ; expand search window | |
1389 | (or found | |
1390 | (re-search-forward pat nil t) | |
1391 | (error "Rerun etags: `%s' not found in %s" | |
1392 | pat buffer-file-name))) | |
1393 | ;; Position point at the right place | |
1394 | ;; if the search string matched an extra Ctrl-m at the beginning. | |
1395 | (and (eq selective-display t) | |
1396 | (looking-at "\^m") | |
1397 | (forward-char 1)) | |
1398 | (beginning-of-line))) | |
9708f7fc | 1399 | |
cba9bdd2 | 1400 | (defun etags-list-tags (file) ; Doc string? |
a1906d51 | 1401 | (goto-char (point-min)) |
79e01623 JB |
1402 | (when (re-search-forward (concat "\f\n" "\\(" file "\\)" ",") nil t) |
1403 | (let ((path (save-excursion (forward-line 1) (file-of-tag))) | |
1404 | ;; Get the local value in the tags table | |
1405 | ;; buffer before switching buffers. | |
1406 | (goto-func goto-tag-location-function) | |
1407 | tag tag-info pt) | |
9708f7fc RM |
1408 | (forward-line 1) |
1409 | (while (not (or (eobp) (looking-at "\f"))) | |
79e01623 JB |
1410 | (setq tag-info (save-excursion (funcall snarf-tag-function t)) |
1411 | tag (car tag-info) | |
1412 | pt (with-current-buffer standard-output (point))) | |
1413 | (princ tag) | |
1414 | (when (= (aref tag 0) ?\() (princ " ...)")) | |
1415 | (with-current-buffer standard-output | |
1416 | (make-text-button pt (point) | |
1417 | 'tag-info tag-info | |
1418 | 'file-path path | |
1419 | 'goto-func goto-func | |
1420 | 'action (lambda (button) | |
1421 | (let ((tag-info (button-get button 'tag-info)) | |
1422 | (goto-func (button-get button 'goto-func))) | |
84406262 | 1423 | (tag-find-file-of-tag (button-get button 'file-path)) |
79e01623 JB |
1424 | (widen) |
1425 | (funcall goto-func tag-info))) | |
26581f0e CY |
1426 | 'follow-link t |
1427 | 'face tags-tag-face | |
79e01623 | 1428 | 'type 'button)) |
9708f7fc | 1429 | (terpri) |
274d013d | 1430 | (forward-line 1)) |
79e01623 | 1431 | t))) |
9708f7fc | 1432 | |
7e7b42b2 GM |
1433 | (defmacro tags-with-face (face &rest body) |
1434 | "Execute BODY, give output to `standard-output' face FACE." | |
06adf6b1 | 1435 | (let ((pp (make-symbol "start"))) |
286c138d | 1436 | `(let ((,pp (with-current-buffer standard-output (point)))) |
7e7b42b2 | 1437 | ,@body |
286c138d | 1438 | (put-text-property ,pp (with-current-buffer standard-output (point)) |
7e7b42b2 GM |
1439 | 'face ,face standard-output)))) |
1440 | ||
1441 | (defun etags-tags-apropos-additional (regexp) | |
1442 | "Display tags matching REGEXP from `tags-apropos-additional-actions'." | |
1443 | (with-current-buffer standard-output | |
1444 | (dolist (oba tags-apropos-additional-actions) | |
1445 | (princ "\n\n") | |
1446 | (tags-with-face 'highlight (princ (car oba))) | |
1447 | (princ":\n\n") | |
79e01623 | 1448 | (let* ((beg (point)) |
7e7b42b2 GM |
1449 | (symbs (car (cddr oba))) |
1450 | (ins-symb (lambda (sy) | |
1451 | (let ((sn (symbol-name sy))) | |
1452 | (when (string-match regexp sn) | |
79e01623 JB |
1453 | (make-text-button (point) |
1454 | (progn (princ sy) (point)) | |
1455 | 'action-internal(cadr oba) | |
1456 | 'action (lambda (button) (funcall | |
1457 | (button-get button 'action-internal) | |
1458 | (button-get button 'item))) | |
1459 | 'item sn | |
1460 | 'face tags-tag-face | |
26581f0e | 1461 | 'follow-link t |
79e01623 | 1462 | 'type 'button) |
7e7b42b2 GM |
1463 | (terpri)))))) |
1464 | (when (symbolp symbs) | |
1465 | (if (boundp symbs) | |
1466 | (setq symbs (symbol-value symbs)) | |
1467 | (insert "symbol `" (symbol-name symbs) "' has no value\n") | |
1468 | (setq symbs nil))) | |
1469 | (if (vectorp symbs) | |
1470 | (mapatoms ins-symb symbs) | |
1471 | (dolist (sy symbs) | |
1472 | (funcall ins-symb (car sy)))) | |
1473 | (sort-lines nil beg (point)))))) | |
1474 | ||
cba9bdd2 | 1475 | (defun etags-tags-apropos (string) ; Doc string? |
7e7b42b2 GM |
1476 | (when tags-apropos-verbose |
1477 | (princ "Tags in file `") | |
1478 | (tags-with-face 'highlight (princ buffer-file-name)) | |
1479 | (princ "':\n\n")) | |
a1906d51 | 1480 | (goto-char (point-min)) |
4f124fb5 EZ |
1481 | (let ((progress-reporter (make-progress-reporter |
1482 | (format "Making tags apropos buffer for `%s'..." | |
1483 | string) | |
1484 | (point-min) (point-max)))) | |
31f98a93 | 1485 | (while (re-search-forward string nil t) |
4f124fb5 | 1486 | (progress-reporter-update progress-reporter (point)) |
31f98a93 MY |
1487 | (beginning-of-line) |
1488 | ||
1489 | (let* ( ;; Get the local value in the tags table | |
1490 | ;; buffer before switching buffers. | |
1491 | (goto-func goto-tag-location-function) | |
1492 | (tag-info (save-excursion (funcall snarf-tag-function))) | |
1493 | (tag (if (eq t (car tag-info)) nil (car tag-info))) | |
1494 | (file-path (save-excursion (if tag (file-of-tag) | |
7caf6803 | 1495 | (save-excursion (forward-line 1) |
31f98a93 MY |
1496 | (file-of-tag))))) |
1497 | (file-label (if tag (file-of-tag t) | |
7caf6803 | 1498 | (save-excursion (forward-line 1) |
31f98a93 MY |
1499 | (file-of-tag t)))) |
1500 | (pt (with-current-buffer standard-output (point)))) | |
1501 | (if tag | |
1502 | (progn | |
1503 | (princ (format "[%s]: " file-label)) | |
1504 | (princ tag) | |
1505 | (when (= (aref tag 0) ?\() (princ " ...)")) | |
1506 | (with-current-buffer standard-output | |
1507 | (make-text-button pt (point) | |
1508 | 'tag-info tag-info | |
1509 | 'file-path file-path | |
1510 | 'goto-func goto-func | |
1511 | 'action (lambda (button) | |
1512 | (let ((tag-info (button-get button 'tag-info)) | |
1513 | (goto-func (button-get button 'goto-func))) | |
1514 | (tag-find-file-of-tag (button-get button 'file-path)) | |
1515 | (widen) | |
1516 | (funcall goto-func tag-info))) | |
26581f0e CY |
1517 | 'follow-link t |
1518 | 'face tags-tag-face | |
31f98a93 MY |
1519 | 'type 'button))) |
1520 | (princ (format "- %s" file-label)) | |
1521 | (with-current-buffer standard-output | |
1522 | (make-text-button pt (point) | |
1523 | 'file-path file-path | |
1524 | 'action (lambda (button) | |
1525 | (tag-find-file-of-tag (button-get button 'file-path)) | |
1526 | ;; Get the local value in the tags table | |
1527 | ;; buffer before switching buffers. | |
1528 | (goto-char (point-min))) | |
26581f0e CY |
1529 | 'follow-link t |
1530 | 'face tags-tag-face | |
1531 | 'type 'button)))) | |
31f98a93 MY |
1532 | (terpri) |
1533 | (forward-line 1)) | |
1534 | (message nil)) | |
7e7b42b2 | 1535 | (when tags-apropos-verbose (princ "\n"))) |
9708f7fc | 1536 | |
cba9bdd2 | 1537 | (defun etags-tags-table-files () ; Doc string? |
9708f7fc RM |
1538 | (let ((files nil) |
1539 | beg) | |
1540 | (goto-char (point-min)) | |
1541 | (while (search-forward "\f\n" nil t) | |
1542 | (setq beg (point)) | |
610c25c1 RS |
1543 | (end-of-line) |
1544 | (skip-chars-backward "^," beg) | |
1545 | (or (looking-at "include$") | |
83287e5b | 1546 | (setq files (cons (buffer-substring beg (1- (point))) files)))) |
9708f7fc RM |
1547 | (nreverse files))) |
1548 | ||
cba9bdd2 | 1549 | (defun etags-tags-included-tables () ; Doc string? |
9708f7fc RM |
1550 | (let ((files nil) |
1551 | beg) | |
1552 | (goto-char (point-min)) | |
1553 | (while (search-forward "\f\n" nil t) | |
1554 | (setq beg (point)) | |
610c25c1 RS |
1555 | (end-of-line) |
1556 | (skip-chars-backward "^," beg) | |
1557 | (if (looking-at "include$") | |
9708f7fc | 1558 | ;; Expand in the default-directory of the tags table buffer. |
610c25c1 | 1559 | (setq files (cons (expand-file-name (buffer-substring beg (1- (point)))) |
9708f7fc RM |
1560 | files)))) |
1561 | (nreverse files))) | |
1562 | \f | |
1563 | ;; Empty tags file support. | |
1564 | ||
7e7b42b2 | 1565 | (defun tags-recognize-empty-tags-table () |
cba9bdd2 RS |
1566 | "Return non-nil if current buffer is empty. |
1567 | If empty, make buffer-local values of the tags table format variables | |
1568 | that do nothing." | |
9708f7fc | 1569 | (and (zerop (buffer-size)) |
dd2cedb9 DL |
1570 | (mapc (lambda (sym) (set (make-local-variable sym) 'ignore)) |
1571 | '(tags-table-files-function | |
1572 | tags-completion-table-function | |
1573 | find-tag-regexp-search-function | |
1574 | find-tag-search-function | |
1575 | tags-apropos-function | |
1576 | tags-included-tables-function)) | |
9708f7fc | 1577 | (set (make-local-variable 'verify-tags-table-function) |
7e7b42b2 | 1578 | (lambda () (zerop (buffer-size)))))) |
9708f7fc | 1579 | \f |
7e7b42b2 | 1580 | ;; Match qualifier functions for tagnames. |
2aa9d1be | 1581 | ;; These functions assume the etags file format defined in etc/ETAGS.EBNF. |
9708f7fc | 1582 | |
6218e8c6 RM |
1583 | ;; This might be a neat idea, but it's too hairy at the moment. |
1584 | ;;(defmacro tags-with-syntax (&rest body) | |
dcaaec23 SM |
1585 | ;; `(with-syntax-table |
1586 | ;; (with-current-buffer (find-file-noselect (file-of-tag)) | |
1587 | ;; (syntax-table)) | |
1588 | ;; ,@body)) | |
6218e8c6 | 1589 | ;;(put 'tags-with-syntax 'edebug-form-spec '(&rest form)) |
8a4c10dc | 1590 | |
2aa9d1be FP |
1591 | ;; exact file name match, i.e. searched tag must match complete file |
1592 | ;; name including directories parts if there are some. | |
1593 | (defun tag-exact-file-name-match-p (tag) | |
cba9bdd2 RS |
1594 | "Return non-nil if TAG matches complete file name. |
1595 | Any directory part of the file name is also matched." | |
2aa9d1be FP |
1596 | (and (looking-at ",[0-9\n]") |
1597 | (save-excursion (backward-char (+ 2 (length tag))) | |
1598 | (looking-at "\f\n")))) | |
cba9bdd2 | 1599 | |
2aa9d1be FP |
1600 | ;; file name match as above, but searched tag must match the file |
1601 | ;; name not including the directories if there are some. | |
1602 | (defun tag-file-name-match-p (tag) | |
cba9bdd2 | 1603 | "Return non-nil if TAG matches file name, excluding directory part." |
2aa9d1be FP |
1604 | (and (looking-at ",[0-9\n]") |
1605 | (save-excursion (backward-char (1+ (length tag))) | |
1606 | (looking-at "/")))) | |
cba9bdd2 | 1607 | |
2aa9d1be FP |
1608 | ;; this / to detect we are after a directory separator is ok for unix, |
1609 | ;; is there a variable that contains the regexp for directory separator | |
1610 | ;; on whatever operating system ? | |
1611 | ;; Looks like ms-win will lose here :). | |
1612 | ||
eb21e7ae | 1613 | ;; t if point is at a tag line that matches TAG exactly. |
9708f7fc | 1614 | ;; point should be just after a string that matches TAG. |
6218e8c6 | 1615 | (defun tag-exact-match-p (tag) |
cba9bdd2 RS |
1616 | "Return non-nil if current tag line matches TAG exactly. |
1617 | Point should be just after a string that matches TAG." | |
add3312f | 1618 | ;; The match is really exact if there is an explicit tag name. |
63aeffd5 | 1619 | (or (and (eq (char-after (point)) ?\001) |
40ce9268 | 1620 | (eq (char-after (- (point) (length tag) 1)) ?\177)) |
63aeffd5 | 1621 | ;; We are not on the explicit tag name, but perhaps it follows. |
eb21e7ae RM |
1622 | (looking-at (concat "[^\177\n]*\177" (regexp-quote tag) "\001")))) |
1623 | ||
d30ffe0e FP |
1624 | ;; t if point is at a tag line that has an implicit name. |
1625 | ;; point should be just after a string that matches TAG. | |
1626 | (defun tag-implicit-name-match-p (tag) | |
cba9bdd2 RS |
1627 | "Return non-nil if current tag line has an implicit name. |
1628 | Point should be just after a string that matches TAG." | |
d30ffe0e FP |
1629 | ;; Look at the comment of the make_tag function in lib-src/etags.c for |
1630 | ;; a textual description of the four rules. | |
1631 | (and (string-match "^[^ \t()=,;]+$" tag) ;rule #1 | |
1632 | (looking-at "[ \t()=,;]?\177") ;rules #2 and #4 | |
1633 | (save-excursion | |
1634 | (backward-char (1+ (length tag))) | |
1635 | (looking-at "[\n \t()=,;]")))) ;rule #3 | |
1636 | ||
eb21e7ae RM |
1637 | ;; t if point is at a tag line that matches TAG as a symbol. |
1638 | ;; point should be just after a string that matches TAG. | |
1639 | (defun tag-symbol-match-p (tag) | |
cba9bdd2 RS |
1640 | "Return non-nil if current tag line matches TAG as a symbol. |
1641 | Point should be just after a string that matches TAG." | |
eb21e7ae RM |
1642 | (and (looking-at "\\Sw.*\177") (looking-at "\\S_.*\177") |
1643 | (save-excursion | |
1644 | (backward-char (1+ (length tag))) | |
1645 | (and (looking-at "\\Sw") (looking-at "\\S_"))))) | |
9708f7fc RM |
1646 | |
1647 | ;; t if point is at a tag line that matches TAG as a word. | |
1648 | ;; point should be just after a string that matches TAG. | |
1649 | (defun tag-word-match-p (tag) | |
cba9bdd2 RS |
1650 | "Return non-nil if current tag line matches TAG as a word. |
1651 | Point should be just after a string that matches TAG." | |
9708f7fc | 1652 | (and (looking-at "\\b.*\177") |
a0f09378 | 1653 | (save-excursion (backward-char (length tag)) |
9708f7fc RM |
1654 | (looking-at "\\b")))) |
1655 | ||
1ea98518 SM |
1656 | ;; partial file name match, i.e. searched tag must match a substring |
1657 | ;; of the file name (potentially including a directory separator). | |
fb7775eb | 1658 | (defun tag-partial-file-name-match-p (tag) |
cba9bdd2 RS |
1659 | "Return non-nil if current tag matches file name. |
1660 | This is a substring match, and it can include directory separators. | |
1661 | Point should be just after a string that matches TAG." | |
1f21ea94 | 1662 | (and (looking-at ".*,[0-9\n]") |
fb7775eb GM |
1663 | (save-excursion (beginning-of-line) |
1664 | (backward-char 2) | |
1665 | (looking-at "\f\n")))) | |
5e882a6a | 1666 | |
9708f7fc RM |
1667 | ;; t if point is in a tag line with a tag containing TAG as a substring. |
1668 | (defun tag-any-match-p (tag) | |
cba9bdd2 | 1669 | "Return non-nil if current tag line contains TAG as a substring." |
9708f7fc | 1670 | (looking-at ".*\177")) |
ff1f0fa6 | 1671 | |
9708f7fc RM |
1672 | ;; t if point is at a tag line that matches RE as a regexp. |
1673 | (defun tag-re-match-p (re) | |
cba9bdd2 | 1674 | "Return non-nil if current tag line matches regexp RE." |
9708f7fc RM |
1675 | (save-excursion |
1676 | (beginning-of-line) | |
1677 | (let ((bol (point))) | |
5ed619e0 | 1678 | (and (search-forward "\177" (line-end-position) t) |
9708f7fc RM |
1679 | (re-search-backward re bol t))))) |
1680 | \f | |
6613bf7a CY |
1681 | (defcustom tags-loop-revert-buffers nil |
1682 | "*Non-nil means tags-scanning loops should offer to reread changed files. | |
1683 | These loops normally read each file into Emacs, but when a file | |
1684 | is already visited, they use the existing buffer. | |
1685 | When this flag is non-nil, they offer to revert the existing buffer | |
1686 | in the case where the file has changed since you visited it." | |
d5792fb2 RS |
1687 | :type 'boolean |
1688 | :group 'etags) | |
1689 | ||
c086701a | 1690 | ;;;###autoload |
9708f7fc RM |
1691 | (defun next-file (&optional initialize novisit) |
1692 | "Select next file among files in current tags table. | |
4f1388fd RM |
1693 | |
1694 | A first argument of t (prefix arg, if interactive) initializes to the | |
1695 | beginning of the list of files in the tags table. If the argument is | |
1696 | neither nil nor t, it is evalled to initialize the list of files. | |
9708f7fc RM |
1697 | |
1698 | Non-nil second argument NOVISIT means use a temporary buffer | |
1699 | to save time and avoid uninteresting warnings. | |
1700 | ||
1701 | Value is nil if the file was already visited; | |
1702 | if the file was newly read in, the value is the filename." | |
c20032c4 RS |
1703 | ;; Make the interactive arg t if there was any prefix arg. |
1704 | (interactive (list (if current-prefix-arg t))) | |
4f1388fd RM |
1705 | (cond ((not initialize) |
1706 | ;; Not the first run. | |
1707 | ) | |
1708 | ((eq initialize t) | |
1709 | ;; Initialize the list from the tags table. | |
1710 | (save-excursion | |
1711 | ;; Visit the tags table buffer to get its list of files. | |
1712 | (visit-tags-table-buffer) | |
83287e5b RM |
1713 | ;; Copy the list so we can setcdr below, and expand the file |
1714 | ;; names while we are at it, in this buffer's default directory. | |
1715 | (setq next-file-list (mapcar 'expand-file-name (tags-table-files))) | |
5c9e49a9 RM |
1716 | ;; Iterate over all the tags table files, collecting |
1717 | ;; a complete list of referenced file names. | |
1718 | (while (visit-tags-table-buffer t) | |
1719 | ;; Find the tail of the working list and chain on the new | |
1720 | ;; sublist for this tags table. | |
1721 | (let ((tail next-file-list)) | |
1722 | (while (cdr tail) | |
1723 | (setq tail (cdr tail))) | |
1724 | ;; Use a copy so the next loop iteration will not modify the | |
1725 | ;; list later returned by (tags-table-files). | |
2f14fde6 | 1726 | (if tail |
83287e5b RM |
1727 | (setcdr tail (mapcar 'expand-file-name (tags-table-files))) |
1728 | (setq next-file-list (mapcar 'expand-file-name | |
1729 | (tags-table-files)))))))) | |
4f1388fd RM |
1730 | (t |
1731 | ;; Initialize the list by evalling the argument. | |
1732 | (setq next-file-list (eval initialize)))) | |
7e7b42b2 | 1733 | (unless next-file-list |
5c9e49a9 RM |
1734 | (and novisit |
1735 | (get-buffer " *next-file*") | |
1736 | (kill-buffer " *next-file*")) | |
4fa15f59 | 1737 | (error "All files processed")) |
f042d383 | 1738 | (let* ((next (car next-file-list)) |
d5792fb2 RS |
1739 | (buffer (get-file-buffer next)) |
1740 | (new (not buffer))) | |
f042d383 RM |
1741 | ;; Advance the list before trying to find the file. |
1742 | ;; If we get an error finding the file, don't get stuck on it. | |
1743 | (setq next-file-list (cdr next-file-list)) | |
d5792fb2 RS |
1744 | ;; Optionally offer to revert buffers |
1745 | ;; if the files have changed on disk. | |
1746 | (and buffer tags-loop-revert-buffers | |
1747 | (not (verify-visited-file-modtime buffer)) | |
6613bf7a CY |
1748 | (y-or-n-p |
1749 | (format | |
1750 | (if (buffer-modified-p buffer) | |
1751 | "File %s changed on disk. Discard your edits? " | |
1752 | "File %s changed on disk. Reread from disk? ") | |
1753 | next)) | |
d5792fb2 | 1754 | (with-current-buffer buffer |
6613bf7a | 1755 | (revert-buffer t t))) |
9708f7fc | 1756 | (if (not (and new novisit)) |
f042d383 | 1757 | (set-buffer (find-file-noselect next novisit)) |
9708f7fc RM |
1758 | ;; Like find-file, but avoids random warning messages. |
1759 | (set-buffer (get-buffer-create " *next-file*")) | |
1760 | (kill-all-local-variables) | |
1761 | (erase-buffer) | |
f042d383 | 1762 | (setq new next) |
9708f7fc | 1763 | (insert-file-contents new nil)) |
9708f7fc | 1764 | new)) |
ff1f0fa6 | 1765 | |
9708f7fc RM |
1766 | (defvar tags-loop-operate nil |
1767 | "Form for `tags-loop-continue' to eval to change one file.") | |
1768 | ||
0f6b9c32 | 1769 | (defvar tags-loop-scan |
b0b3cce2 KH |
1770 | '(error "%s" |
1771 | (substitute-command-keys | |
4fa15f59 | 1772 | "No \\[tags-search] or \\[tags-query-replace] in progress")) |
9708f7fc RM |
1773 | "Form for `tags-loop-continue' to eval to scan one file. |
1774 | If it returns non-nil, this file needs processing by evalling | |
1775 | \`tags-loop-operate'. Otherwise, move on to the next file.") | |
ff1f0fa6 | 1776 | |
ece6e35a GM |
1777 | (defun tags-loop-eval (form) |
1778 | "Evaluate FORM and return its result. | |
1779 | Bind `case-fold-search' during the evaluation, depending on the value of | |
1780 | `tags-case-fold-search'." | |
1781 | (let ((case-fold-search (if (memq tags-case-fold-search '(t nil)) | |
1782 | tags-case-fold-search | |
1783 | case-fold-search))) | |
1784 | (eval form))) | |
ddc76b00 | 1785 | |
ece6e35a | 1786 | |
c086701a | 1787 | ;;;###autoload |
ff1f0fa6 JB |
1788 | (defun tags-loop-continue (&optional first-time) |
1789 | "Continue last \\[tags-search] or \\[tags-query-replace] command. | |
4f1388fd RM |
1790 | Used noninteractively with non-nil argument to begin such a command (the |
1791 | argument is passed to `next-file', which see). | |
78809db7 RM |
1792 | |
1793 | Two variables control the processing we do on each file: the value of | |
1794 | `tags-loop-scan' is a form to be executed on each file to see if it is | |
1795 | interesting (it returns non-nil if so) and `tags-loop-operate' is a form to | |
1796 | evaluate to operate on an interesting file. If the latter evaluates to | |
1797 | nil, we exit; otherwise we scan the next file." | |
ff1f0fa6 | 1798 | (interactive) |
9708f7fc | 1799 | (let (new |
565c8985 RS |
1800 | ;; Non-nil means we have finished one file |
1801 | ;; and should not scan it again. | |
1802 | file-finished | |
04528cda | 1803 | original-point |
9708f7fc RM |
1804 | (messaged nil)) |
1805 | (while | |
1806 | (progn | |
1807 | ;; Scan files quickly for the first or next interesting one. | |
04528cda | 1808 | ;; This starts at point in the current buffer. |
565c8985 | 1809 | (while (or first-time file-finished |
9708f7fc RM |
1810 | (save-restriction |
1811 | (widen) | |
ece6e35a | 1812 | (not (tags-loop-eval tags-loop-scan)))) |
04528cda GM |
1813 | ;; If nothing was found in the previous file, and |
1814 | ;; that file isn't in a temp buffer, restore point to | |
1815 | ;; where it was. | |
1816 | (when original-point | |
1817 | (goto-char original-point)) | |
1818 | ||
565c8985 | 1819 | (setq file-finished nil) |
9708f7fc | 1820 | (setq new (next-file first-time t)) |
04528cda | 1821 | |
9708f7fc RM |
1822 | ;; If NEW is non-nil, we got a temp buffer, |
1823 | ;; and NEW is the file name. | |
04528cda GM |
1824 | (when (or messaged |
1825 | (and (not first-time) | |
1826 | (> baud-rate search-slow-speed) | |
1827 | (setq messaged t))) | |
1828 | (message "Scanning file %s..." (or new buffer-file-name))) | |
1829 | ||
9708f7fc | 1830 | (setq first-time nil) |
04528cda | 1831 | (setq original-point (if new nil (point))) |
9708f7fc RM |
1832 | (goto-char (point-min))) |
1833 | ||
1834 | ;; If we visited it in a temp buffer, visit it now for real. | |
1835 | (if new | |
1836 | (let ((pos (point))) | |
1837 | (erase-buffer) | |
1838 | (set-buffer (find-file-noselect new)) | |
78809db7 | 1839 | (setq new nil) ;No longer in a temp buffer. |
9708f7fc | 1840 | (widen) |
04528cda GM |
1841 | (goto-char pos)) |
1842 | (push-mark original-point t)) | |
9708f7fc RM |
1843 | |
1844 | (switch-to-buffer (current-buffer)) | |
1845 | ||
1846 | ;; Now operate on the file. | |
1847 | ;; If value is non-nil, continue to scan the next file. | |
ece6e35a | 1848 | (tags-loop-eval tags-loop-operate)) |
565c8985 | 1849 | (setq file-finished t)) |
9708f7fc RM |
1850 | (and messaged |
1851 | (null tags-loop-operate) | |
1852 | (message "Scanning file %s...found" buffer-file-name)))) | |
9708f7fc | 1853 | ;;;###autoload (define-key esc-map "," 'tags-loop-continue) |
ff1f0fa6 | 1854 | |
c086701a | 1855 | ;;;###autoload |
4f1388fd | 1856 | (defun tags-search (regexp &optional file-list-form) |
9708f7fc | 1857 | "Search through all files listed in tags table for match for REGEXP. |
ff1f0fa6 JB |
1858 | Stops when a match is found. |
1859 | To continue searching for next match, use command \\[tags-loop-continue]. | |
1860 | ||
9708f7fc | 1861 | See documentation of variable `tags-file-name'." |
ff1f0fa6 JB |
1862 | (interactive "sTags search (regexp): ") |
1863 | (if (and (equal regexp "") | |
9708f7fc | 1864 | (eq (car tags-loop-scan) 're-search-forward) |
b6176f64 | 1865 | (null tags-loop-operate)) |
9708f7fc | 1866 | ;; Continue last tags-search as if by M-,. |
ff1f0fa6 | 1867 | (tags-loop-continue nil) |
06adf6b1 | 1868 | (setq tags-loop-scan `(re-search-forward ',regexp nil t) |
9708f7fc | 1869 | tags-loop-operate nil) |
4f1388fd | 1870 | (tags-loop-continue (or file-list-form t)))) |
ff1f0fa6 | 1871 | |
c086701a | 1872 | ;;;###autoload |
c575e658 | 1873 | (defun tags-query-replace (from to &optional delimited file-list-form) |
056f8a11 | 1874 | "Do `query-replace-regexp' of FROM with TO on all files listed in tags table. |
ff1f0fa6 | 1875 | Third arg DELIMITED (prefix arg) means replace only word-delimited matches. |
056f8a11 | 1876 | If you exit (\\[keyboard-quit], RET or q), you can resume the query replace |
ff1f0fa6 | 1877 | with the command \\[tags-loop-continue]. |
405b8be3 EZ |
1878 | Fourth arg FILE-LIST-FORM non-nil means initialize the replacement loop. |
1879 | Fifth and sixth arguments START and END are accepted, for compatibility | |
1880 | with `query-replace-regexp', and ignored. | |
ff1f0fa6 | 1881 | |
c575e658 RS |
1882 | If FILE-LIST-FORM is non-nil, it is a form to evaluate to |
1883 | produce the list of files to search. | |
1884 | ||
1885 | See also the documentation of the variable `tags-file-name'." | |
17b9c33c | 1886 | (interactive (query-replace-read-args "Tags query replace (regexp)" t t)) |
06adf6b1 SM |
1887 | (setq tags-loop-scan `(let ,(unless (equal from (downcase from)) |
1888 | '((case-fold-search nil))) | |
1889 | (if (re-search-forward ',from nil t) | |
1890 | ;; When we find a match, move back | |
1891 | ;; to the beginning of it so perform-replace | |
1892 | ;; will see it. | |
1893 | (goto-char (match-beginning 0)))) | |
64b98d12 JL |
1894 | tags-loop-operate `(perform-replace ',from ',to t t ',delimited |
1895 | nil multi-query-replace-map)) | |
4f1388fd | 1896 | (tags-loop-continue (or file-list-form t))) |
9708f7fc | 1897 | \f |
cba9bdd2 | 1898 | (defun tags-complete-tags-table-file (string predicate what) ; Doc string? |
83287e5b RM |
1899 | (save-excursion |
1900 | ;; If we need to ask for the tag table, allow that. | |
1901 | (let ((enable-recursive-minibuffers t)) | |
1902 | (visit-tags-table-buffer)) | |
1903 | (if (eq what t) | |
725349c8 SM |
1904 | (all-completions string (tags-table-files) predicate) |
1905 | (try-completion string (tags-table-files) predicate)))) | |
83287e5b | 1906 | |
c086701a | 1907 | ;;;###autoload |
83287e5b RM |
1908 | (defun list-tags (file &optional next-match) |
1909 | "Display list of tags in file FILE. | |
1910 | This searches only the first table in the list, and no included tables. | |
1911 | FILE should be as it appeared in the `etags' command, usually without a | |
1912 | directory specification." | |
1913 | (interactive (list (completing-read "List tags in file: " | |
1914 | 'tags-complete-tags-table-file | |
1915 | nil t nil))) | |
1916 | (with-output-to-temp-buffer "*Tags List*" | |
7e7b42b2 GM |
1917 | (princ "Tags in file `") |
1918 | (tags-with-face 'highlight (princ file)) | |
1919 | (princ "':\n\n") | |
83287e5b RM |
1920 | (save-excursion |
1921 | (let ((first-time t) | |
1922 | (gotany nil)) | |
1923 | (while (visit-tags-table-buffer (not first-time)) | |
1924 | (setq first-time nil) | |
1925 | (if (funcall list-tags-function file) | |
1926 | (setq gotany t))) | |
1927 | (or gotany | |
7e7b42b2 GM |
1928 | (error "File %s not in current tags tables" file))))) |
1929 | (with-current-buffer "*Tags List*" | |
a6e7bdf1 | 1930 | (require 'apropos) |
6ef254ec RS |
1931 | (with-no-warnings |
1932 | (apropos-mode)) | |
79e01623 | 1933 | (setq buffer-read-only t))) |
ff1f0fa6 | 1934 | |
c086701a | 1935 | ;;;###autoload |
9708f7fc RM |
1936 | (defun tags-apropos (regexp) |
1937 | "Display list of all tags in tags table REGEXP matches." | |
1938 | (interactive "sTags apropos (regexp): ") | |
ff1f0fa6 | 1939 | (with-output-to-temp-buffer "*Tags List*" |
7e7b42b2 GM |
1940 | (princ "Click mouse-2 to follow tags.\n\nTags matching regexp `") |
1941 | (tags-with-face 'highlight (princ regexp)) | |
1942 | (princ "':\n\n") | |
ff1f0fa6 | 1943 | (save-excursion |
47f3c459 RM |
1944 | (let ((first-time t)) |
1945 | (while (visit-tags-table-buffer (not first-time)) | |
1946 | (setq first-time nil) | |
7e7b42b2 GM |
1947 | (funcall tags-apropos-function regexp)))) |
1948 | (etags-tags-apropos-additional regexp)) | |
1949 | (with-current-buffer "*Tags List*" | |
7caf6803 | 1950 | (eval-and-compile (require 'apropos)) |
89228b63 JB |
1951 | (apropos-mode) |
1952 | ;; apropos-mode is derived from fundamental-mode and it kills | |
1953 | ;; all local variables. | |
1954 | (setq buffer-read-only t))) | |
9708f7fc | 1955 | \f |
1ea98518 | 1956 | ;; XXX Kludge interface. |
aa228418 | 1957 | |
36278af3 | 1958 | (define-button-type 'tags-select-tags-table |
29878150 | 1959 | 'action 'select-tags-table-select |
26581f0e | 1960 | 'follow-link t |
36278af3 MY |
1961 | 'help-echo "RET, t or mouse-2: select tags table") |
1962 | ||
9708f7fc | 1963 | ;; XXX If a file is in multiple tables, selection may get the wrong one. |
29add8b9 | 1964 | ;;;###autoload |
9708f7fc RM |
1965 | (defun select-tags-table () |
1966 | "Select a tags table file from a menu of those you have already used. | |
168e43e7 | 1967 | The list of tags tables to select from is stored in `tags-table-set-list'; |
9708f7fc RM |
1968 | see the doc of that variable if you want to add names to the list." |
1969 | (interactive) | |
1970 | (pop-to-buffer "*Tags Table List*") | |
9099b373 GM |
1971 | (setq buffer-read-only nil |
1972 | buffer-undo-list t) | |
9708f7fc | 1973 | (erase-buffer) |
9708f7fc | 1974 | (let ((set-list tags-table-set-list) |
36278af3 MY |
1975 | (desired-point nil) |
1976 | b) | |
7e7b42b2 | 1977 | (when tags-table-list |
29878150 SM |
1978 | (setq desired-point (point-marker)) |
1979 | (setq b (point)) | |
1980 | (princ (mapcar 'abbreviate-file-name tags-table-list) (current-buffer)) | |
1981 | (make-text-button b (point) 'type 'tags-select-tags-table | |
1982 | 'etags-table (car tags-table-list)) | |
7e7b42b2 | 1983 | (insert "\n")) |
9708f7fc | 1984 | (while set-list |
7e7b42b2 | 1985 | (unless (eq (car set-list) tags-table-list) |
36278af3 | 1986 | (setq b (point)) |
29878150 SM |
1987 | (princ (mapcar 'abbreviate-file-name (car set-list)) (current-buffer)) |
1988 | (make-text-button b (point) 'type 'tags-select-tags-table | |
1989 | 'etags-table (car (car set-list))) | |
9708f7fc RM |
1990 | (insert "\n")) |
1991 | (setq set-list (cdr set-list))) | |
7e7b42b2 | 1992 | (when tags-file-name |
29878150 SM |
1993 | (or desired-point |
1994 | (setq desired-point (point-marker))) | |
1995 | (setq b (point)) | |
1996 | (insert (abbreviate-file-name tags-file-name)) | |
1997 | (make-text-button b (point) 'type 'tags-select-tags-table | |
1998 | 'etags-table tags-file-name) | |
7e7b42b2 | 1999 | (insert "\n")) |
9708f7fc | 2000 | (setq set-list (delete tags-file-name |
9993b561 | 2001 | (apply 'nconc (cons (copy-sequence tags-table-list) |
9708f7fc RM |
2002 | (mapcar 'copy-sequence |
2003 | tags-table-set-list))))) | |
2004 | (while set-list | |
36278af3 | 2005 | (setq b (point)) |
29878150 SM |
2006 | (insert (abbreviate-file-name (car set-list))) |
2007 | (make-text-button b (point) 'type 'tags-select-tags-table | |
2008 | 'etags-table (car set-list)) | |
9708f7fc RM |
2009 | (insert "\n") |
2010 | (setq set-list (delete (car set-list) set-list))) | |
a1906d51 | 2011 | (goto-char (point-min)) |
9708f7fc RM |
2012 | (insert-before-markers |
2013 | "Type `t' to select a tags table or set of tags tables:\n\n") | |
2014 | (if desired-point | |
2015 | (goto-char desired-point)) | |
2016 | (set-window-start (selected-window) 1 t)) | |
2017 | (set-buffer-modified-p nil) | |
ef90db45 RS |
2018 | (select-tags-table-mode)) |
2019 | ||
cba9bdd2 | 2020 | (defvar select-tags-table-mode-map ; Doc string? |
29878150 SM |
2021 | (let ((map (make-sparse-keymap))) |
2022 | (set-keymap-parent map button-buffer-map) | |
36278af3 MY |
2023 | (define-key map "t" 'push-button) |
2024 | (define-key map " " 'next-line) | |
2025 | (define-key map "\^?" 'previous-line) | |
2026 | (define-key map "n" 'next-line) | |
2027 | (define-key map "p" 'previous-line) | |
2028 | (define-key map "q" 'select-tags-table-quit) | |
2029 | map)) | |
ef90db45 | 2030 | |
175069ef SM |
2031 | (define-derived-mode select-tags-table-mode special-mode "Select Tags Table" |
2032 | "Major mode for choosing a current tags table among those already loaded." | |
29878150 SM |
2033 | (setq buffer-read-only t)) |
2034 | ||
2035 | (defun select-tags-table-select (button) | |
9708f7fc | 2036 | "Select the tags table named on this line." |
29878150 SM |
2037 | (interactive (list (or (button-at (line-beginning-position)) |
2038 | (error "No tags table on current line")))) | |
2039 | (let ((name (button-get button 'etags-table))) | |
9708f7fc RM |
2040 | (visit-tags-table name) |
2041 | (select-tags-table-quit) | |
2042 | (message "Tags table now %s" name))) | |
49116ac0 | 2043 | |
9708f7fc RM |
2044 | (defun select-tags-table-quit () |
2045 | "Kill the buffer and delete the selected window." | |
2046 | (interactive) | |
7591cf05 | 2047 | (quit-window t (selected-window))) |
9708f7fc | 2048 | \f |
3a07ffce CY |
2049 | ;;;###autoload |
2050 | (defun complete-tag () | |
2051 | "Perform tags completion on the text around point. | |
2052 | Completes to the set of names listed in the current tags table. | |
2053 | The string to complete is chosen in the same way as the default | |
2054 | for \\[find-tag] (which see)." | |
2055 | (interactive) | |
2056 | (or tags-table-list | |
2057 | tags-file-name | |
2058 | (error "%s" | |
2059 | (substitute-command-keys | |
2060 | "No tags table loaded; try \\[visit-tags-table]"))) | |
8c0bf8b3 SM |
2061 | (let ((comp-data (tags-completion-at-point-function))) |
2062 | (if (null comp-data) | |
2063 | (error "Nothing to complete") | |
2064 | (apply 'completion-in-region comp-data)))) | |
3a07ffce | 2065 | |
dd2cedb9 DL |
2066 | (dolist (x '("^No tags table in use; use .* to select one$" |
2067 | "^There is no default tag$" | |
2068 | "^No previous tag locations$" | |
2069 | "^File .* is not a valid tags table$" | |
2070 | "^No \\(more \\|\\)tags \\(matching\\|containing\\) " | |
2071 | "^Rerun etags: `.*' not found in " | |
2072 | "^All files processed$" | |
2073 | "^No .* or .* in progress$" | |
2074 | "^File .* not in current tags tables$" | |
2075 | "^No tags table loaded" | |
2076 | "^Nothing to complete$")) | |
2077 | (add-to-list 'debug-ignored-errors x)) | |
9708f7fc RM |
2078 | \f |
2079 | (provide 'etags) | |
e5167999 ER |
2080 | |
2081 | ;;; etags.el ends here |