5:37 a.m.
Martin Buchholz <martin(a)xemacs.org> writes:
Exact searching for symbols in lisp mode seems to be messed up.
To reproduce, make a TAGS table for XEmacs using `make TAGS',
do xemacs -q
eval
(setq tags-always-exact t)
visit the file .../lisp/etags.el
and do M-x find-tag RET find-tag RET
==> No entries matching find-tag
I am unable to repeat this bug. For me, `M-. find-tag RET' correctly
finds `find-tag'.
Another bug: If I try
M-x find-tag RET list* RET
it will find the tag for `list', not `list*'.
That's because the expression you type in is actually a regexp
(tags-always-exact is something else, and it's almost totally obsolete
now.)
`M-. list\* RET' will correctly find one definition of `list*' (and a
subsequent `M-,' will find the other one.)
XEmacs should first look for an exact string match for the symbol
surrounded by the ^? and ^A delimiters before trying a pattern
match.
I think I prefer it to be consistent. Perhaps there should be a
switch to turn off the regexp behaviour.
--
Hrvoje Niksic <hniksic(a)srce.hr> | Student at FER Zagreb, Croatia
--------------------------------+--------------------------------
You know it's going to be a bad day when your twin brother forgot
your birthday.
10:12 a.m.
New subject: BUG REPORT: etags searching in lisp mode
>>>> "Hrvoje" == Hrvoje Niksic
<hniksic(a)srce.hr> writes:
Hrvoje> Martin Buchholz <martin(a)xemacs.org> writes:
> Exact searching for symbols in lisp mode seems to be messed up.
>
> To reproduce, make a TAGS table for XEmacs using `make TAGS',
> do xemacs -q eval (setq tags-always-exact t) visit the file
> .../lisp/etags.el and do M-x find-tag RET find-tag RET ==> No
> entries matching find-tag
Hrvoje> I am unable to repeat this bug. For me, `M-. find-tag
Hrvoje> RET' correctly finds `find-tag'.
> Another bug: If I try M-x find-tag RET list* RET it will find
> the tag for `list', not `list*'.
Hrvoje> That's because the expression you type in is actually a
Hrvoje> regexp (tags-always-exact is something else, and it's
Hrvoje> almost totally obsolete now.)
Hrvoje> `M-. list\* RET' will correctly find one definition of
Hrvoje> `list*' (and a subsequent `M-,' will find the other one.)
> XEmacs should first look for an exact string match for the
> symbol surrounded by the ^? and ^A delimiters before trying a
> pattern match.
The function find-tag-internal never looks between ^? and ^A and in my eyes
that's a bug. I've fixed this yesterday and it seems to work, but I've
not tried it with inexact matches or with regular expressions. I need
this changes, because I'm using tag tables, where the first part of
an tag table entry is the real string found by etags in the source
file and the second part (that's the one between the ^? and ^A) is the
name of the constructed function or method (eg: some languages like
Clips builds accessor methods from the slots of classes). With my
changes I'm now able to find the definition of a slot, when I'm
searching with the name of the method.
In the original function there's a strange implementation of the
search. I don't understand why it was implemented this way, so it's
possible, that my changes breaks something else. Therefore I've
included the changed file in this mail. Please try it and let me know
if it works or not. I'll send a patch to xemacs-patches if it works.
;;; etags.el --- etags facility for Emacs
;; Copyright 1985, 1986, 1988, 1990, 1997 Free Software Foundation, Inc.
;; Author: Their Name is Legion (see list below)
;; Maintainer: XEmacs Development Team
;; Keywords: tools
;; This file is part of XEmacs.
;; XEmacs is free software; you can redistribute it and/or modify it
;; under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;; XEmacs is distributed in the hope that it will be useful, but
;; WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;; General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with XEmacs; see the file COPYING. If not, write to the
;; Free Software Foundation, 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Synched up with: Not synched with FSF.
;;; Commentary:
;; This file is completely different from FSF's etags.el. It appears
;; that an early version of this file (tags.el) has been rewritten by
;; two different people; we got one, FSF got the other. Various
;; people have said that our version is better and faster.
;; TODO:
;; - DOCUMENT!
;; Derived from the original lisp/tags.el.
;; Ideas and code from the work of the following people:
;; Andy Norman <ange(a)hplb.hpl.hp.com>, author of ange-tags.el
;; Ramana Rao <rao(a)arisia.xerox.com>
;; John Sturdy <jcgs(a)harlqn.co.uk>, author of tags-helper.el
;; Henry Kautz <kautz(a)allegra.att.com>, author of tag-completion.el
;; Dan LaLiberte <liberte(a)cs.uiuc.edu>, author of local-tags.el
;; Tom Dietterich <tgd(a)turing.cs.orst.edu>, author of quest.el
;; The author(s) of lisp/simple.el
;; Duke Briscoe <briscoe(a)cs.yale.edu>
;; Lynn Slater <lrs(a)indetech.com>, author of location.el
;; Shinichirou Sugou <shin(a)sgtp.apple.juice.or.jp>
;; an unidentified anonymous elisp hacker
;; Kyle Jones <kyle_jones(a)wonderworks.com>
;; added "Exact match, then inexact" code
;; added support for include directive.
;; Hrvoje Niksic <hniksic(a)srce.hr>
;; various changes.
;;; User variables.
(defgroup etags nil
"Etags facility for Emacs.
Using etags, you can create tag tables for any number of files, and
easily access the symbols in those files, using the `\\[find-tag]'
command."
:prefix "tags-"
:group 'tools)
(defcustom tags-build-completion-table 'ask
"*If this variable is nil, then tags completion is disabled.
If it is t, then things which prompt for tags will do so with completion
across all known tags.
If it is the symbol `ask', you will be asked whether each tags table
should be added to the completion list as it is read in. (With the
exception that for very small tags tables, you will not be asked,
since they can be parsed quickly.)"
:type '(choice (const :tag "Disabled" nil)
(const :tag "Complete All" t)
(const :tag "Ask" ask))
:group 'etags)
(defcustom tags-always-exact nil
"*If this variable is non-nil, then tags always looks for exact matches.
If it is nil (the default), tags will first go through exact matches,
then through the non-exact ones."
:type 'boolean
:group 'etags)
(defcustom tag-table-alist nil
"*A list which determines which tags files are active for a buffer.
This is not really an association list, in that all elements are
checked. The CAR of each element of this list is a pattern against
which the buffer's file name is compared; if it matches, then the CDR
of the list should be the name of the tags table to use. If more than
one element of this list matches the buffer's file name, then all of
the associated tags tables will be used. Earlier ones will be
searched first.
If the CAR of elements of this list are strings, then they are treated
as regular-expressions against which the file is compared (like the
auto-mode-alist). If they are not strings, then they are evaluated.
If they evaluate to non-nil, then the current buffer is considered to
match.
If the CDR of the elements of this list are strings, then they are
assumed to name a TAGS file. If they name a directory, then the string
\"TAGS\" is appended to them to get the file name. If they are not
strings, then they are evaluated, and must return an appropriate string.
For example:
(setq tag-table-alist
'((\"/usr/src/public/perl/\" .
\"/usr/src/public/perl/perl-3.0/\")
(\"\\\\.el$\" . \"/usr/local/emacs/src/\")
(\"/jbw/gnu/\" . \"/usr15/degree/stud/jbw/gnu/\")
(\"\" . \"/usr/local/emacs/src/\")
))
This means that anything in the /usr/src/public/perl/ directory should use
the TAGS file /usr/src/public/perl/perl-3.0/TAGS; and file ending in .el should
use the TAGS file /usr/local/emacs/src/TAGS; and anything in or below the
directory /jbw/gnu/ should use the TAGS file /usr15/degree/stud/jbw/gnu/TAGS.
A file called something like \"/usr/jbw/foo.el\" would use both the TAGS files
/usr/local/emacs/src/TAGS and /usr15/degree/stud/jbw/gnu/TAGS (in that order)
because it matches both patterns.
If the buffer-local variable `buffer-tag-table' is set, then it names a tags
table that is searched before all others when find-tag is executed from this
buffer.
If there is a file called \"TAGS\" in the same directory as the file in
question, then that tags file will always be used as well (after the
`buffer-tag-table' but before the tables specified by this list.)
If the variable tags-file-name is set, then the tags file it names will apply
to all buffers (for backwards compatibility.) It is searched first."
:type '(repeat (cons :format "%v"
(choice :value ""
(regexp :tag "Buffer regexp")
sexp)
(choice :value ""
(string :tag "Tag file or directory")
sexp)))
:group 'etags)
(defvar buffer-tag-table nil
"*The additional name of one TAGS table to be used for this buffer.
You can set this with `\\[set-buffer-tag-table]'. See the documentation
for the variable `tag-table-alist' for more information.")
(make-variable-buffer-local 'buffer-tag-table)
(defvar tags-file-name nil
"The name of the tags-table used by all buffers.
This is for backwards compatibility, and is largely supplanted by the
variable tag-table-alist.")
(defcustom tags-auto-read-changed-tag-files nil
"*If non-nil, always re-read changed TAGS file without prompting.
If nil, prompt whether to re-read the changed TAGS file."
:type 'boolean
:group 'etags)
(defcustom make-tags-files-invisible nil
"*If non-nil, TAGS-files will not show up in buffer-lists or be
selectable (or deletable.)"
:type 'boolean
:group 'etags)
(defcustom tags-search-nuke-uninteresting-buffers t
"*If non-nil, keep newly-visited files if they contain the search target.
This affects the `tags-search' and `tags-query-replace' commands."
:type 'boolean
:group 'etags)
;; Buffer tag tables.
(defun buffer-tag-table-list ()
"Returns a list (ordered) of the tags tables which should be used for
the current buffer."
(let (result)
;; Explicitly set buffer-tag-table
(when buffer-tag-table
(push buffer-tag-table result))
;; Current directory
(when (file-readable-p (concat default-directory "TAGS"))
(push (concat default-directory "TAGS") result))
;; Parent directory
(let ((parent-tag-file (expand-file-name "../TAGS" default-directory)))
(when (file-readable-p parent-tag-file)
(push parent-tag-file result)))
;; tag-table-alist
(let ((key (or buffer-file-name
(concat default-directory (buffer-name))))
expression)
(dolist (item tag-table-alist)
(setq expression (car item))
;; If the car of the alist item is a string, apply it as a regexp
;; to the buffer-file-name. Otherwise, evaluate it. If the
;; regexp matches, or the expression evaluates non-nil, then this
;; item in tag-table-alist applies to this buffer.
(when (if (stringp expression)
(string-match expression key)
(ignore-errors
(eval expression)))
;; Now evaluate the cdr of the alist item to get the name of
;; the tag table file.
(setq expression (ignore-errors
(eval (cdr item))))
(if (stringp expression)
(push expression result)
(error "Expression in tag-table-alist evaluated to non-string")))))
(setq result
(mapcar
(lambda (name)
(when (file-directory-p name)
(setq name (concat (file-name-as-directory name) "TAGS")))
(and (file-readable-p name)
;; get-tag-table-buffer has side-effects
(symbol-value-in-buffer 'buffer-file-name
(get-tag-table-buffer name))))
result))
(setq result (delq nil result))
;; If no TAGS file has been found, ask the user explicitly.
;; #### tags-file-name is *evil*.
(or result tags-file-name
(call-interactively 'visit-tags-table))
(when tags-file-name
(setq result (nconc result (list tags-file-name))))
(or result (error "Buffer has no associated tag tables"))
(delete-duplicates (nreverse result) :test 'equal)))
;;;###autoload
(defun visit-tags-table (file)
"Tell tags commands to use tags table file FILE when all else fails.
FILE should be the name of a file created with the `etags' program.
A directory name is ok too; it means file TAGS in that directory."
(interactive (list (read-file-name "Visit tags table: (default TAGS) "
default-directory
(expand-file-name "TAGS" default-directory)
t)))
(if (string-equal file "")
(setq tags-file-name nil)
(setq file (expand-file-name file))
(when (file-directory-p file)
(setq file (expand-file-name "TAGS" file)))
;; It used to be that, if a user pressed RET by mistake, the bogus
;; `tags-file-name' would remain, causing the error at
;; `buffer-tag-table'.
(when (file-exists-p file)
(setq tags-file-name file))))
(defun set-buffer-tag-table (file)
"In addition to the tags tables specified by the variable `tag-table-alist',
each buffer can have one additional table. This command sets that.
See the documentation for the variable `tag-table-alist' for more information."
(interactive
(list
(read-file-name "Visit tags table: (directory sufficient) "
nil default-directory t)))
(or file (error "No TAGS file name supplied"))
(setq file (expand-file-name file))
(when (file-directory-p file)
(setq file (expand-file-name "TAGS" file)))
(or (file-exists-p file) (error "TAGS file missing: %s" file))
(setq buffer-tag-table file))
;; Manipulating the tag table buffer
(defconst tag-table-completion-status nil
"Indicates whether a completion table has been built.
Either nil, t, or `disabled'.")
(make-variable-buffer-local 'tag-table-completion-status)
(defconst tag-table-files nil
"If the current buffer is a TAGS table, this holds a list of the files
referenced by this file, or nil if that hasn't been computed yet.")
(make-variable-buffer-local 'tag-table-files)
(defun get-tag-table-buffer (tag-table)
"Returns a buffer visiting the given TAGS table.
If appropriate, reverting the buffer, and possibly build a completion-table."
(or (stringp tag-table)
(error "Bad tags file name supplied: %s" tag-table))
;; Remove symbolic links from name.
(setq tag-table (symlink-expand-file-name tag-table))
(let (buf build-completion check-name)
(setq buf (get-file-buffer tag-table))
(unless buf
(if (file-readable-p tag-table)
(setq buf (find-file-noselect tag-table)
check-name t)
(error "No such tags file: %s" tag-table)))
(with-current-buffer buf
;; Make the TAGS buffer invisible.
(when (and check-name
make-tags-files-invisible
(string-match "\\`[^ ]" (buffer-name)))
(rename-buffer (generate-new-buffer-name
(concat " " (buffer-name)))))
(or (verify-visited-file-modtime buf)
(cond ((or tags-auto-read-changed-tag-files
(yes-or-no-p
(format "Tags file %s has changed, read new contents? "
tag-table)))
(when tags-auto-read-changed-tag-files
(message "Tags file %s has changed, reading new contents..."
tag-table))
(revert-buffer t t)
(when (eq tag-table-completion-status t)
(setq tag-table-completion-status nil))
(setq tag-table-files nil))))
(or (eq (char-after 1) ?\f)
(error "File %s not a valid tags file" tag-table))
(or (memq tag-table-completion-status '(t disabled))
(setq build-completion t))
(when build-completion
(if (ecase tags-build-completion-table
((nil) nil)
((t) t)
((ask)
;; don't bother asking for small ones
(or (< (buffer-size) 20000)
(y-or-n-p
(format "Build tag completion table for %s? "
tag-table)))))
;; The user wants to build the table:
(condition-case nil
(progn
(add-to-tag-completion-table)
(setq tag-table-completion-status t))
;; Allow user to C-g out correctly
(quit
(message "Tags completion table construction aborted")
(setq tag-table-completion-status nil
quit-flag t)
t))
;; The table is verboten.
(setq tag-table-completion-status 'disabled))))
buf))
(defun file-of-tag ()
"Return the file name of the file whose tags point is within.
Assumes the tag table is the current buffer.
File name returned is relative to tag table file's directory."
(let ((opoint (point))
prev size)
(save-excursion
(goto-char (point-min))
(while (< (point) opoint)
(forward-line 1)
(end-of-line)
(skip-chars-backward "^,\n")
(setq prev (point)
size (read (current-buffer)))
(goto-char prev)
(forward-line 1)
;; New include syntax
;; filename,include
;; tacked on to the end of a tag file means use filename
;; as a tag file before giving up.
;; Skip it here.
(unless (eq size 'include)
(forward-char size)))
(goto-char (1- prev))
(buffer-substring (point) (point-at-bol)))))
(defun tag-table-include-files ()
"Return all file names associated with `include' directives in a tag
buffer."
;; New include syntax
;; filename,include
;; tacked on to the end of a tag file means use filename as a
;; tag file before giving up.
(let ((files nil))
(save-excursion
(goto-char (point-min))
(while (re-search-forward "\f\n\\(.*\\),include$" nil t)
(push (match-string 1) files)))
files))
(defun tag-table-files (tag-table)
"Returns a list of the files referenced by the named TAGS table."
(with-current-buffer (get-tag-table-buffer tag-table)
(unless tag-table-files
(let (files prev size)
(goto-char (point-min))
(while (not (eobp))
(forward-line 1)
(end-of-line)
(skip-chars-backward "^,\n")
(setq prev (point)
size (read (current-buffer)))
(goto-char prev)
(push (expand-file-name (buffer-substring (1- (point))
(point-at-bol))
default-directory)
files)
(forward-line 1)
(forward-char size))
(setq tag-table-files (nreverse files))))
tag-table-files))
;; #### should this be on previous page?
(defun buffer-tag-table-files ()
"Returns a list of all files referenced by all TAGS tables that
this buffer uses."
(apply #'nconc
(mapcar #'tag-table-files (buffer-tag-table-list))))
;; Building the completion table
;; Test cases for building completion table; must handle these properly:
;; Lisp_Int, XSETINT, current_column 60,2282
;; Lisp_Int, XSETINT, point>NumCharacters ? 0 : CharAt(363,9935
;; Lisp_Int, XSETINT, point<=FirstCharacter ? 0 : CharAt(366,10108
;; point<=FirstCharacter || CharAt(378,10630
;; point>NumCharacters || CharAt(382,10825
;; DEFUN ("x-set-foreground-color", Fx_set_foreground_color,191,4562
;; DEFUN ("x-set-foreground-color", Fx_set_foreground_color,191,4562
;; DEFUN ("*", Ftimes,1172,32079
;; DEFUN ("/=", Fneq,1035,28839
;; defun_internal 4199,101362
;; int pure[PURESIZE / sizeof 53,1564
;; char staticvec1[NSTATICS * sizeof 667,17608
;; Date: 04 May 87 23:53:11 PDT 26,1077
;; #define anymacroname(324,4344
;; (define-key ctl-x-map 311,11784
;; (define-abbrev-table 'c-mode-abbrev-table 24,1016
;; static char *skip_white(116,3443
;; static foo 348,11643
;; (defun texinfo-insert-＠code 91,3358
;; (defvar texinfo-kindex)29,1105
;; (defun texinfo-format-\. 548,18376
;; (defvar sm::menu-kludge-y 621,22726
;; (defvar *mouse-drag-window* 103,3642
;; (defun simula-back-level(317,11263
;; } DPxAC,380,14024
;; } BM_QCB;69,2990
;; #define MTOS_DONE\t
;; "^[^ ]+ +\\([^ ]+\\) "
;; void *find_cactus_segment(116,2444
;; void *find_pdb_segment(162,3688
;; void init_dclpool(410,10739
;; WORD insert_draw_command(342,8881
;; void *req_pdbmem(579,15574
(defvar tag-completion-table (make-vector 511 0))
(defvar tag-symbol)
(defvar tag-table-symbol)
(defvar tag-symbol-tables)
(defvar buffer-tag-table-list)
(defmacro intern-tag-symbol (tag)
`(progn
(setq tag-symbol (intern ,tag tag-completion-table)
tag-symbol-tables (and (boundp tag-symbol)
(symbol-value tag-symbol)))
(or (memq tag-table-symbol tag-symbol-tables)
(set tag-symbol (cons tag-table-symbol tag-symbol-tables)))))
;; Can't use "\\s " in these patterns because that will include newline
(defconst tags-DEFUN-pattern
"DEFUN[ \t]*(\"\\([^\"]+\\)\",[
\t]*\\(\\(\\sw\\|\\s_\\)+\\),\C-?")
(defconst tags-array-pattern ".*[ \t]+\\([^ \[]+\\)\\[")
(defconst tags-def-pattern
"\\(.*[ \t]+\\)?\\**\\(\\(\\sw\\|\\s_\\)+\\)[ ();,\t]*\C-?"
;; "\\(.*[ \t]+\\)?\\(\\(\\sw\\|\\s_\\)+\\)[ ()]*\C-?"
;; "\\(\\sw\\|\\s_\\)+[ ()]*\C-?"
)
(defconst tags-file-pattern "^\f\n\\(.+\\),[0-9]+\n")
;; #### Should make it work with the `include' directive!
(defun add-to-tag-completion-table ()
"Sucks the current buffer (a TAGS table) into the completion-table."
(message "Adding %s to tags completion table..." buffer-file-name)
(goto-char (point-min))
(let ((tag-table-symbol (intern buffer-file-name tag-completion-table))
;; tag-table-symbol is used by intern-tag-symbol
filename file-type name name2 tag-symbol
tag-symbol-tables
(case-fold-search nil))
;; Loop over the files mentioned in the TAGS file for each file,
;; try to find its major-mode, then process tags appropriately.
(while (looking-at tags-file-pattern)
(goto-char (match-end 0))
(setq filename (file-name-sans-versions (match-string 1))
;; We used to check auto-mode-alist for the proper
;; file-type. This was way too slow, as it had to process
;; an enormous amount of regexps for each time. Now we
;; use the shotgun approach with only two regexps.
file-type (cond ((string-match "\\.\\([cC]\\|cc\\|cxx\\)\\'"
filename)
'c-mode)
((string-match "\\.\\(el\\|cl\\|lisp\\)\\'"
filename)
'lisp-mode)
((string-match "\\.scm\\'" filename)
'scheme-mode)
(t nil)))
(set-syntax-table (cond ((and (eq file-type 'c-mode)
c-mode-syntax-table)
c-mode-syntax-table)
((eq file-type 'lisp-mode)
lisp-mode-syntax-table)
(t (standard-syntax-table))))
;; Clear loop variables.
(setq name nil name2 nil)
(lmessage 'progress "%s..." filename)
;; Loop over the individual tag lines.
(while (not (or (eobp) (eq (char-after) ?\f)))
(cond ((and (eq file-type 'c-mode)
(looking-at "DEFUN[ \t]"))
;; DEFUN
(or (looking-at tags-DEFUN-pattern)
(error "DEFUN doesn't fit pattern"))
(setq name (match-string 1)
name2 (match-string 2)))
;;((looking-at "\\s ")
;; skip probably bogus entry:
;;)
((and (eq file-type 'c-mode)
(looking-at ".*\\["))
;; Array
(cond ((not (looking-at tags-array-pattern))
(message "array definition doesn't fit pattern")
(setq name nil))
(t
(setq name (match-string 1)))))
((and (eq file-type 'scheme-mode)
(looking-at
"\\s-*(\\s-*def\\sw*\\s-*(?\\s-*\\(\\(\\sw\\|\\s_\\|:\\)+\\))?\\s-*\C-?"))
;; Something Schemish (is this really necessary??)
(setq name (match-string 1)))
((looking-at tags-def-pattern)
;; ???
(setq name (match-string 2))))
;; add the tags we found to the completion table
(and name (intern-tag-symbol name))
(and name2 (intern-tag-symbol name2))
(forward-line 1)))
(or (eobp) (error "Bad TAGS file")))
(message "Adding %s to tags completion table...done" buffer-file-name))
;; Interactive find-tag
(defvar find-tag-default-hook nil
"Function to call to create a default tag.
Make it buffer-local in a mode hook. The function is called with no
arguments.")
(defvar find-tag-hook nil
"Function to call after a tag is found.
Make it buffer-local in a mode hook. The function is called with no
arguments.")
;; Return a default tag to search for, based on the text at point.
(defun find-tag-default ()
(or (and (not (memq find-tag-default-hook '(nil find-tag-default)))
(condition-case data
(funcall find-tag-default-hook)
(error
(warn "Error in find-tag-default-hook signalled error: %s"
(error-message-string data))
nil)))
(symbol-near-point)))
;; This function depends on the following symbols being bound properly:
;; buffer-tag-table-list,
;; tag-symbol-tables (value irrelevant, bound outside for efficiency)
(defun tag-completion-predicate (tag-symbol)
(and (boundp tag-symbol)
(setq tag-symbol-tables (symbol-value tag-symbol))
(catch 'found
(while tag-symbol-tables
(when (memq (car tag-symbol-tables) buffer-tag-table-list)
(throw 'found t))
(setq tag-symbol-tables (cdr tag-symbol-tables))))))
(defun buffer-tag-table-symbol-list ()
(mapcar (lambda (table-name)
(intern table-name tag-completion-table))
(buffer-tag-table-list)))
(defvar find-tag-history nil "History list for find-tag-tag.")
(defun find-tag-tag (prompt)
(let* ((default (find-tag-default))
(buffer-tag-table-list (buffer-tag-table-symbol-list))
tag-symbol-tables tag-name)
(setq tag-name
(completing-read
(if default
(format "%s(default %s) " prompt default)
prompt)
tag-completion-table 'tag-completion-predicate nil nil
'find-tag-history))
(if (string-equal tag-name "")
;; #### - This is a really LAME way of doing it! --Stig
default ;indicate exact symbol match
tag-name)))
(defvar last-tag-data nil
"Information for continuing a tag search.
Is of the form (TAG POINT MATCHING-EXACT TAG-TABLE TAG-TABLE ...).")
(defvar tags-loop-operate nil
"Form for `tags-loop-continue' to eval to change one file.")
(defvar tags-loop-scan
'(error "%s" (substitute-command-keys
"No \\[tags-search] or \\[tags-query-replace] in progress."))
"Form for `tags-loop-continue' to eval to scan one file.
If it returns non-nil, this file needs processing by evalling
\`tags-loop-operate'. Otherwise, move on to the next file.")
(autoload 'get-symbol-syntax-table "symbol-syntax")
(defun find-tag-internal (tagname)
(let ((next (null tagname))
(tmpnext (null tagname))
;; If tagname is a list: (TAGNAME), this indicates
;; requiring an exact symbol match.
(exact (or tags-always-exact (consp tagname)))
(normal-syntax-table (syntax-table))
(exact-syntax-table (get-symbol-syntax-table (syntax-table)))
tag-table-currently-matching-exact
tag-target exact-tagname
tag-tables tag-table-point file linebeg startpos buf
offset found pat syn-tab)
(when (consp tagname)
(setq tagname (car tagname)))
(cond (next
(setq tagname (car last-tag-data))
(setq tag-table-currently-matching-exact
(car (cdr (cdr last-tag-data)))))
(t
(setq tag-table-currently-matching-exact t)))
(setq exact-tagname (concat "\C-?" tagname "\C-A"))
(save-excursion
(catch 'found
;; Loop searching for exact matches and then inexact matches.
(while (not (eq tag-table-currently-matching-exact 'neither))
(cond (tmpnext
(setq tag-tables (cdr (cdr (cdr last-tag-data)))
tag-table-point (car (cdr last-tag-data)))
;; Start from the beginning of the table list on the
;; next iteration of the loop.
(setq tmpnext nil))
(t
(setq tag-tables (buffer-tag-table-list)
tag-table-point 1)))
(if tag-table-currently-matching-exact
(setq tag-target exact-tagname
syn-tab exact-syntax-table)
(setq tag-target tagname
syn-tab normal-syntax-table))
(with-search-caps-disable-folding tag-target t
(while tag-tables
(set-buffer (get-tag-table-buffer (car tag-tables)))
(bury-buffer (current-buffer))
(goto-char (or tag-table-point (point-min)))
(setq tag-table-point nil)
(letf (((syntax-table) syn-tab)
(case-fold-search nil))
;; #### should there be support for non-regexp
;; tag searches?
(while (re-search-forward tag-target nil t)
(and
;; If we're looking for inexact matches, skip
;; exact matches since we've visited them
;; already.
(or tag-table-currently-matching-exact
(letf (((syntax-table) exact-syntax-table))
(save-excursion
(goto-char (match-beginning 0))
(not (looking-at exact-tagname)))))
(throw 'found t))))
(setq tag-tables
(nconc (tag-table-include-files) (cdr tag-tables)))))
(if (and (not exact) (eq tag-table-currently-matching-exact t))
(setq tag-table-currently-matching-exact nil)
(setq tag-table-currently-matching-exact 'neither)))
(error "No %sentries %s %s"
(if next "more " "")
(if exact "matching" "containing")
tagname))
(search-forward "\C-?")
(setq file (expand-file-name (file-of-tag)
;; In XEmacs, this needs to be
;; relative to:
(or (file-name-directory (car tag-tables))
"./")))
(setq linebeg (buffer-substring (1- (point)) (point-at-bol)))
(search-forward ",")
(setq startpos (read (current-buffer)))
(setq last-tag-data
(nconc (list tagname (point) tag-table-currently-matching-exact)
tag-tables))
(setq buf (find-file-noselect file))
(with-current-buffer buf
(save-excursion
(save-restriction
(widen)
;; Here we search for PAT in the range [STARTPOS - OFFSET,
;; STARTPOS + OFFSET], with increasing values of OFFSET.
;;
;; We used to set the initial offset to 1000, but the
;; actual sources show that finer-grained control is
;; needed (e.g. two `hash_string's in src/symbols.c.) So,
;; I changed 100 to 100, and (* 3 offset) to (* 5 offset).
(setq offset 100)
(setq pat (concat "^" (regexp-quote linebeg)))
(or startpos (setq startpos (point-min)))
(while (and (not found)
(progn
(goto-char (- startpos offset))
(not (bobp))))
(setq found (re-search-forward pat (+ startpos offset) t))
(setq offset (* 5 offset)))
;; Finally, try finding it anywhere in the buffer.
(or found
(re-search-forward pat nil t)
(error "%s not found in %s" pat file))
(beginning-of-line)
(setq startpos (point)))))
(cons buf startpos))))
;;;###autoload
(defun find-tag (tagname &optional other-window)
"*Find tag whose name contains TAGNAME.
Selects the buffer that the tag is contained in
and puts point at its definition.
If TAGNAME is a null string, the expression in the buffer
around or before point is used as the tag name.
If called interactively with a numeric argument, searches for the next tag
in the tag table that matches the tagname used in the previous find-tag.
If second arg OTHER-WINDOW is non-nil, uses another window to display
the tag.
This version of this function supports multiple active tags tables,
and completion.
Variables of note:
tag-table-alist controls which tables apply to which buffers
tags-file-name a default tags table
tags-build-completion-table controls completion behavior
buffer-tag-table another way of specifying a buffer-local table
make-tags-files-invisible whether tags tables should be very hidden
tag-mark-stack-max how many tags-based hops to remember"
(interactive (if current-prefix-arg
'(nil nil)
(list (find-tag-tag "Find tag: ") nil)))
(let* ((local-find-tag-hook find-tag-hook)
(next (null tagname))
(result (find-tag-internal tagname))
(tag-buf (car result))
(tag-point (cdr result)))
;; Push old position on the tags mark stack.
(if (or (not next)
(not (memq last-command
'(find-tag find-tag-other-window tags-loop-continue))))
(push-tag-mark))
(if other-window
(pop-to-buffer tag-buf)
(switch-to-buffer tag-buf))
(widen)
(push-mark)
(goto-char tag-point)
(if find-tag-hook
(funcall find-tag-hook)
(if local-find-tag-hook
(funcall local-find-tag-hook))))
(setq tags-loop-scan (list 'find-tag nil nil)
tags-loop-operate nil)
;; Return t in case used as the tags-loop-scan.
t)
;;;###autoload
(defun find-tag-other-window (tagname &optional next)
"*Find tag whose name contains TAGNAME.
Selects the buffer that the tag is contained in in another window
and puts point at its definition.
If TAGNAME is a null string, the expression in the buffer
around or before point is used as the tag name.
If second arg NEXT is non-nil (interactively, with prefix arg),
searches for the next tag in the tag table
that matches the tagname used in the previous find-tag.
This version of this function supports multiple active tags tables,
and completion.
Variables of note:
tag-table-alist controls which tables apply to which buffers
tags-file-name a default tags table
tags-build-completion-table controls completion behavior
buffer-tag-table another way of specifying a buffer-local table
make-tags-files-invisible whether tags tables should be very hidden
tag-mark-stack-max how many tags-based hops to remember"
(interactive (if current-prefix-arg
'(nil t)
(list (find-tag-tag "Find tag other window: "))))
(if next
(find-tag nil t)
(find-tag tagname t)))
;; Completion on tags in the buffer.
(defun complete-symbol (&optional table predicate prettify)
(let* ((end (point))
(beg (save-excursion
(backward-sexp 1)
;;(while (= (char-syntax (following-char)) ?\')
;; (forward-char 1))
(skip-syntax-forward "'")
(point)))
(pattern (buffer-substring beg end))
(table (or table obarray))
(completion (try-completion pattern table predicate)))
(cond ((eq completion t))
((null completion)
(error "Can't find completion for \"%s\"" pattern))
((not (string-equal pattern completion))
(delete-region beg end)
(insert completion))
(t
(message "Making completion list...")
(let ((list (all-completions pattern table predicate)))
(if prettify
(setq list (funcall prettify list)))
(with-output-to-temp-buffer "*Help*"
(display-completion-list list)))
(message "Making completion list...%s" "done")))))
;;;###autoload
(defun tag-complete-symbol ()
"The function used to do tags-completion (using
'tag-completion-predicate)."
(interactive)
(let* ((buffer-tag-table-list (buffer-tag-table-symbol-list))
tag-symbol-tables)
(complete-symbol tag-completion-table 'tag-completion-predicate)))
;; Applying a command to files mentioned in tag tables
(defvar next-file-list nil
"List of files for next-file to process.")
;;;###autoload
(defun next-file (&optional initialize novisit)
"Select next file among files in current tag table(s).
A first argument of t (prefix arg, if interactive) initializes to the
beginning of the list of files in the (first) tags table. If the argument
is neither nil nor t, it is evalled to initialize the list of files.
Non-nil second argument NOVISIT means use a temporary buffer
to save time and avoid uninteresting warnings.
Value is nil if the file was already visited;
if the file was newly read in, the value is the filename."
(interactive "P")
(cond ((not initialize)
;; Not the first run.
)
((eq initialize t)
;; Initialize the list from the tags table.
(setq next-file-list (buffer-tag-table-files)))
(t
;; Initialize the list by evalling the argument.
(setq next-file-list (eval initialize))))
(when (null next-file-list)
(and novisit
(get-buffer " *next-file*")
(kill-buffer " *next-file*"))
(error "All files processed"))
(let* ((file (car next-file-list))
(buf (get-file-buffer file))
(new (not buf)))
(pop next-file-list)
(if (not (and new novisit))
(switch-to-buffer (find-file-noselect file novisit) t)
;; Like find-file, but avoids random junk.
(set-buffer (get-buffer-create " *next-file*"))
(kill-all-local-variables)
(erase-buffer)
(insert-file-contents file nil))
(widen)
(when (> (point) (point-min))
(push-mark nil t)
(goto-char (point-min)))
(and new file)))
;;;###autoload
(defun tags-loop-continue (&optional first-time)
"Continue last \\[tags-search] or \\[tags-query-replace] command.
Used noninteractively with non-nil argument to begin such a command (the
argument is passed to `next-file', which see).
Two variables control the processing we do on each file:
the value of `tags-loop-scan' is a form to be executed on each file
to see if it is interesting (it returns non-nil if so)
and `tags-loop-operate' is a form to execute to operate on an interesting file
If the latter returns non-nil, we exit; otherwise we scan the next file."
(interactive)
(let ((messaged nil)
(more-files-p t)
new)
(while more-files-p
;; Scan files quickly for the first or next interesting one.
(while (or first-time
(save-restriction
(widen)
(not (eval tags-loop-scan))))
(setq new (next-file first-time
tags-search-nuke-uninteresting-buffers))
;; If NEW is non-nil, we got a temp buffer,
;; and NEW is the file name.
(if (or messaged
(and (not first-time)
(> (device-baud-rate) search-slow-speed)
(setq messaged t)))
(lmessage 'progress
"Scanning file %s..." (or new buffer-file-name)))
(setq first-time nil)
(goto-char (point-min)))
;; If we visited it in a temp buffer, visit it now for real.
(if (and new tags-search-nuke-uninteresting-buffers)
(let ((pos (point)))
(erase-buffer)
(set-buffer (find-file-noselect new))
(widen)
(goto-char pos)))
(switch-to-buffer (current-buffer))
;; Now operate on the file.
;; If value is non-nil, continue to scan the next file.
(setq more-files-p (eval tags-loop-operate)))
(and messaged
(null tags-loop-operate)
(message "Scanning file %s...found" buffer-file-name))))
;;;###autoload
(defun tags-search (regexp &optional file-list-form)
"Search through all files listed in tags table for match for REGEXP.
Stops when a match is found.
To continue searching for next match, use command \\[tags-loop-continue].
See documentation of variable `tag-table-alist'."
(interactive "sTags search (regexp): ")
(if (and (equal regexp "")
(eq (car tags-loop-scan) 'with-search-caps-disable-folding)
(null tags-loop-operate))
;; Continue last tags-search as if by `M-,'.
(tags-loop-continue nil)
(setq tags-loop-scan `(with-search-caps-disable-folding ,regexp t
(re-search-forward ,regexp nil t))
tags-loop-operate nil)
(tags-loop-continue (or file-list-form t))))
;;;###autoload
(defun tags-query-replace (from to &optional delimited file-list-form)
"Query-replace-regexp FROM with TO through all files listed in tags table.
Third arg DELIMITED (prefix arg) means replace only word-delimited matches.
If you exit (\\[keyboard-quit] or ESC), you can resume the query-replace
with the command \\[tags-loop-continue].
See documentation of variable `tag-table-alist'."
(interactive
"sTags query replace (regexp): \nsTags query replace %s by: \nP")
(setq tags-loop-scan `(with-search-caps-disable-folding ,from t
(if (re-search-forward ,from nil t)
;; When we find a match, move back
;; to the beginning of it so perform-replace
;; will see it.
(progn (goto-char (match-beginning 0)) t)))
tags-loop-operate (list 'perform-replace from to t t
(not (null delimited))))
(tags-loop-continue (or file-list-form t)))
;; Miscellaneous
;;;###autoload
(defun list-tags (file)
"Display list of tags in FILE."
(interactive (list (read-file-name
(if (buffer-file-name)
(format "List tags (in file, %s by default): "
(file-name-nondirectory (buffer-file-name)))
"List tags (in file): ")
nil (buffer-file-name) t)))
(find-file-noselect file)
(with-output-to-temp-buffer "*Tags List*"
(princ "Tags in file ")
(princ file)
(terpri)
(save-excursion
(dolist (tags-file (with-current-buffer (get-file-buffer file)
(buffer-tag-table-list)))
;; We don't want completions getting in the way.
(let ((tags-build-completion-table nil))
(set-buffer (get-tag-table-buffer tags-file)))
(goto-char (point-min))
(when
(search-forward (concat "\f\n" (file-name-nondirectory file)
",")
nil t)
(forward-line 1)
(while (not (or (eobp) (looking-at "\f")))
(princ (buffer-substring (point)
(progn (skip-chars-forward "^\C-?")
(point))))
(terpri)
(forward-line 1)))))))
;;;###autoload
(defun tags-apropos (string)
"Display list of all tags in tag table REGEXP matches."
(interactive "sTag apropos (regexp): ")
(with-output-to-temp-buffer "*Tags List*"
(princ "Tags matching regexp ")
(prin1 string)
(terpri)
(save-excursion
(visit-tags-table-buffer)
(goto-char 1)
(while (re-search-forward string nil t)
(beginning-of-line)
(princ (buffer-substring (point)
(progn (skip-chars-forward "^\C-?")
(point))))
(terpri)
(forward-line 1)))))
;; #### copied from tags.el. This function is *very* big in FSF.
(defun visit-tags-table-buffer ()
"Select the buffer containing the current tag table."
(or tags-file-name
(call-interactively 'visit-tags-table))
(set-buffer (or (get-file-buffer tags-file-name)
(progn
(setq tag-table-files nil)
(find-file-noselect tags-file-name))))
(or (verify-visited-file-modtime (get-file-buffer tags-file-name))
(cond ((yes-or-no-p "Tags file has changed, read new contents? ")
(revert-buffer t t)
(setq tag-table-files nil))))
(or (eq (char-after 1) ?\^L)
(error "File %s not a valid tag table" tags-file-name)))
;; Sample uses of find-tag-hook and find-tag-default-hook
;; This is wrong. We should either make this behaviour default and
;; back it up, or not use it at all. For now, I've commented it out.
;; --hniksic
;; Example buffer-local tag finding
;(add-hook 'emacs-lisp-mode-hook 'setup-emacs-lisp-default-tag-hook)
;(defun setup-emacs-lisp-default-tag-hook ()
; (cond ((eq major-mode 'emacs-lisp-mode)
; (make-variable-buffer-local 'find-tag-default-hook)
; (setq find-tag-default-hook 'emacs-lisp-default-tag))))
;;; Run it once immediately
;(setup-emacs-lisp-default-tag-hook)
;(when (get-buffer "*scratch*")
; (with-current-buffer "*scratch*"
; (setup-emacs-lisp-default-tag-hook)))
;(defun emacs-lisp-default-tag ()
; "Function to return a default tag for Emacs-Lisp mode."
; (let ((tag (or (variable-at-point)
; (function-at-point))))
; (if tag (symbol-name tag))))
;; Display short info on tag in minibuffer
;; Don't pollute `M-?' -- we may need it for more important stuff. --hniksic
;(if (null (lookup-key esc-map "?"))
; (define-key esc-map "?" 'display-tag-info))
(defun display-tag-info (tagname)
"Prints a description of the first tag matching TAGNAME in the echo area.
If this is an elisp function, prints something like \"(defun foo (x y z)\".
That is, is prints the first line of the definition of the form.
If this is a C-defined elisp function, it does something more clever."
(interactive (if current-prefix-arg
'(nil)
(list (find-tag-tag "Display tag info: "))))
(let* ((results (find-tag-internal tagname))
(tag-buf (car results))
(tag-point (cdr results))
info lname min max fname args)
(with-current-buffer tag-buf
(save-excursion
(save-restriction
(widen)
(goto-char tag-point)
(cond ((let ((case-fold-search nil))
(looking-at "^DEFUN[ \t]"))
(forward-sexp 1)
(down-list 1)
(setq lname (read (current-buffer))
fname (buffer-substring
(progn (forward-sexp 1) (point))
(progn (backward-sexp 1) (point)))
min (buffer-substring
(progn (forward-sexp 3) (point))
(progn (backward-sexp 1) (point)))
max (buffer-substring
(progn (forward-sexp 2) (point))
(progn (backward-sexp 1) (point))))
(backward-up-list 1)
(setq args (buffer-substring
(progn (forward-sexp 2) (point))
(progn (backward-sexp 1) (point))))
(setq info (format "Elisp: %s, C: %s %s, #args: %s"
lname
fname args
(if (string-equal min max)
min
(format "from %s to %s" min max)))))
(t
(setq info
(buffer-substring
(progn (beginning-of-line) (point))
(progn (end-of-line) (point)))))))))
(message "%s" info))
(setq tags-loop-scan '(display-tag-info nil)
tags-loop-operate nil)
;; Always return non-nil
t)
;; Tag mark stack.
(defvar tag-mark-stack1 nil)
(defvar tag-mark-stack2 nil)
(defcustom tag-mark-stack-max 16
"*The maximum number of elements kept on the mark-stack used
by tags-search. See also the commands `\\[push-tag-mark]' and
and `\\[pop-tag-mark]'."
:type 'integer
:group 'etags)
(defun push-mark-on-stack (stack-symbol &optional max-size)
(let ((stack (symbol-value stack-symbol)))
(push (point-marker) stack)
(cond ((and max-size
(> (length stack) max-size))
(set-marker (car (nthcdr max-size stack)) nil)
(setcdr (nthcdr (1- max-size) stack) nil)))
(set stack-symbol stack)))
(defun pop-mark-from-stack (stack-symbol1 stack-symbol2 &optional max-size)
(let* ((stack (or (symbol-value stack-symbol1)
(error "No more tag marks on stack")))
(marker (car stack))
(m-buf (marker-buffer marker)))
(set stack-symbol1 (cdr stack))
(or m-buf
(error "Marker has no buffer"))
(or (buffer-live-p m-buf)
(error "Buffer has been killed"))
(push-mark-on-stack stack-symbol2 max-size)
(switch-to-buffer m-buf)
(widen)
(goto-char marker)))
(defun push-tag-mark ()
(push-mark-on-stack 'tag-mark-stack1 tag-mark-stack-max))
;;;###autoload (define-key esc-map "*" 'pop-tag-mark)
(defun pop-tag-mark (arg)
"Go to last tag position.
`find-tag' maintains a mark-stack seperate from the \\[set-mark-command] mark-stack.
This function pops (and moves to) the tag at the top of this stack."
(interactive "P")
(if (not arg)
(pop-mark-from-stack
'tag-mark-stack1 'tag-mark-stack2 tag-mark-stack-max)
(pop-mark-from-stack
'tag-mark-stack2 'tag-mark-stack1 tag-mark-stack-max)))
(provide 'etags)
(provide 'tags)
Hrvoje> I think I prefer it to be consistent. Perhaps there
Hrvoje> should be a switch to turn off the regexp behaviour.
I think, that there's already a comment in etags.el, which suggested this.
Hrvoje> -- Hrvoje Niksic <hniksic(a)srce.hr> | Student at FER
Hrvoje> Zagreb, Croatia
Hrvoje> --------------------------------+--------------------------------
Hrvoje> You know it's going to be a bad day when your twin brother
Hrvoje> forgot your birthday.
--
Heiko Muenkel <muenkel(a)tnt.uni-hannover.de>
<A
href="http://www.tnt.uni-hannover.de/wiss/muenkel.html">Münkel</A>
PGP-KeyID: 0x4845D4A5
10:41 p.m.
New subject: BUG REPORT: etags searching in lisp mode
>>>> "Heiko" == Heiko Muenkel
<muenkel(a)tnt.uni-hannover.de> writes:
>>>> "Hrvoje" == Hrvoje Niksic
<hniksic(a)srce.hr> writes:
Hrvoje> Martin Buchholz <martin(a)xemacs.org>
writes:
>> Exact searching for symbols in lisp mode seems to be messed
up.
>>
>> To reproduce, make a TAGS table for XEmacs using `make TAGS',
>> do xemacs -q eval (setq tags-always-exact t) visit the file
>> .../lisp/etags.el and do M-x find-tag RET find-tag RET ==> No
>> entries matching find-tag
Hrvoje> I am unable to repeat this bug. For me, `M-. find-tag
Hrvoje> RET' correctly finds `find-tag'.
Did you omit the step, `visit .../lisp/etags.el'? The key is changing
the syntax table of the current buffer.
>> Another bug: If I try M-x find-tag RET list* RET it will
find
>> the tag for `list', not `list*'.
Hrvoje> That's because the expression you type in is actually a
Hrvoje> regexp (tags-always-exact is something else, and it's
Hrvoje> almost totally obsolete now.)
The docstring for find-tag says nothing about regexps. If a user
wants to do regexp searching for tags, isn't the right tool
tags-apropos? (although this function could use some updating, too)
Hrvoje> `M-. list\* RET' will correctly find one definition of
Hrvoje> `list*' (and a subsequent `M-,' will find the other one.)
>> XEmacs should first look for an exact string match for the
>> symbol surrounded by the ^? and ^A delimiters before trying a
>> pattern match.
Heiko> The function find-tag-internal never looks between ^? and ^A and in my eyes
Heiko> that's a bug. I've fixed this yesterday and it seems to work, but
I've
Heiko> not tried it with inexact matches or with regular expressions. I need
Heiko> this changes, because I'm using tag tables, where the first part of
Heiko> an tag table entry is the real string found by etags in the source
Heiko> file and the second part (that's the one between the ^? and ^A) is the
Heiko> name of the constructed function or method (eg: some languages like
Heiko> Clips builds accessor methods from the slots of classes). With my
Heiko> changes I'm now able to find the definition of a slot, when I'm
Heiko> searching with the name of the method.
Heiko> In the original function there's a strange implementation of the
Heiko> search. I don't understand why it was implemented this way, so it's
Heiko> possible, that my changes breaks something else. Therefore I've
Heiko> included the changed file in this mail. Please try it and let me know
Heiko> if it works or not. I'll send a patch to xemacs-patches if it works.
Heiko, thanks for looking at this. Hrvoje, please take a look at
Heiko's changes.
Heiko> ;;; etags.el --- etags facility for Emacs
Heiko> ;; Copyright 1985, 1986, 1988, 1990, 1997 Free Software Foundation, Inc.
Heiko> ;; Author: Their Name is Legion (see list below)
Heiko> ;; Maintainer: XEmacs Development Team
Heiko> ;; Keywords: tools
Heiko> ;; This file is part of XEmacs.
Heiko> ;; XEmacs is free software; you can redistribute it and/or modify it
Heiko> ;; under the terms of the GNU General Public License as published by
Heiko> ;; the Free Software Foundation; either version 2, or (at your option)
Heiko> ;; any later version.
Heiko> ;; XEmacs is distributed in the hope that it will be useful, but
Heiko> ;; WITHOUT ANY WARRANTY; without even the implied warranty of
Heiko> ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Heiko> ;; General Public License for more details.
Heiko> ;; You should have received a copy of the GNU General Public License
Heiko> ;; along with XEmacs; see the file COPYING. If not, write to the
Heiko> ;; Free Software Foundation, 59 Temple Place - Suite 330,
Heiko> ;; Boston, MA 02111-1307, USA.
Heiko> ;;; Synched up with: Not synched with FSF.
Heiko> ;;; Commentary:
Heiko> ;; This file is completely different from FSF's etags.el. It appears
Heiko> ;; that an early version of this file (tags.el) has been rewritten by
Heiko> ;; two different people; we got one, FSF got the other. Various
Heiko> ;; people have said that our version is better and faster.
Heiko> ;; TODO:
Heiko> ;; - DOCUMENT!
Heiko> ;; Derived from the original lisp/tags.el.
Heiko> ;; Ideas and code from the work of the following people:
Heiko> ;; Andy Norman <ange(a)hplb.hpl.hp.com>, author of ange-tags.el
Heiko> ;; Ramana Rao <rao(a)arisia.xerox.com>
Heiko> ;; John Sturdy <jcgs(a)harlqn.co.uk>, author of tags-helper.el
Heiko> ;; Henry Kautz <kautz(a)allegra.att.com>, author of tag-completion.el
Heiko> ;; Dan LaLiberte <liberte(a)cs.uiuc.edu>, author of local-tags.el
Heiko> ;; Tom Dietterich <tgd(a)turing.cs.orst.edu>, author of quest.el
Heiko> ;; The author(s) of lisp/simple.el
Heiko> ;; Duke Briscoe <briscoe(a)cs.yale.edu>
Heiko> ;; Lynn Slater <lrs(a)indetech.com>, author of location.el
Heiko> ;; Shinichirou Sugou <shin(a)sgtp.apple.juice.or.jp>
Heiko> ;; an unidentified anonymous elisp hacker
Heiko> ;; Kyle Jones <kyle_jones(a)wonderworks.com>
Heiko> ;; added "Exact match, then inexact" code
Heiko> ;; added support for include directive.
Heiko> ;; Hrvoje Niksic <hniksic(a)srce.hr>
Heiko> ;; various changes.
Heiko>
Heiko> ;;; User variables.
Heiko> (defgroup etags nil
Heiko> "Etags facility for Emacs.
Heiko> Using etags, you can create tag tables for any number of files, and
Heiko> easily access the symbols in those files, using the `\\[find-tag]'
Heiko> command."
Heiko> :prefix "tags-"
Heiko> :group 'tools)
Heiko> (defcustom tags-build-completion-table 'ask
Heiko> "*If this variable is nil, then tags completion is disabled.
Heiko> If it is t, then things which prompt for tags will do so with completion
Heiko> across all known tags.
Heiko> If it is the symbol `ask', you will be asked whether each tags table
Heiko> should be added to the completion list as it is read in. (With the
Heiko> exception that for very small tags tables, you will not be asked,
Heiko> since they can be parsed quickly.)"
Heiko> :type '(choice (const :tag "Disabled" nil)
Heiko> (const :tag "Complete All" t)
Heiko> (const :tag "Ask" ask))
Heiko> :group 'etags)
Heiko> (defcustom tags-always-exact nil
Heiko> "*If this variable is non-nil, then tags always looks for exact matches.
Heiko> If it is nil (the default), tags will first go through exact matches,
Heiko> then through the non-exact ones."
Heiko> :type 'boolean
Heiko> :group 'etags)
Heiko> (defcustom tag-table-alist nil
Heiko> "*A list which determines which tags files are active for a buffer.
Heiko> This is not really an association list, in that all elements are
Heiko> checked. The CAR of each element of this list is a pattern against
Heiko> which the buffer's file name is compared; if it matches, then the CDR
Heiko> of the list should be the name of the tags table to use. If more than
Heiko> one element of this list matches the buffer's file name, then all of
Heiko> the associated tags tables will be used. Earlier ones will be
Heiko> searched first.
Heiko> If the CAR of elements of this list are strings, then they are treated
Heiko> as regular-expressions against which the file is compared (like the
Heiko> auto-mode-alist). If they are not strings, then they are evaluated.
Heiko> If they evaluate to non-nil, then the current buffer is considered to
Heiko> match.
Heiko> If the CDR of the elements of this list are strings, then they are
Heiko> assumed to name a TAGS file. If they name a directory, then the string
Heiko> \"TAGS\" is appended to them to get the file name. If they are not
Heiko> strings, then they are evaluated, and must return an appropriate string.
Heiko> For example:
Heiko> (setq tag-table-alist
Heiko> '((\"/usr/src/public/perl/\" .
\"/usr/src/public/perl/perl-3.0/\")
Heiko> (\"\\\\.el$\" . \"/usr/local/emacs/src/\")
Heiko> (\"/jbw/gnu/\" . \"/usr15/degree/stud/jbw/gnu/\")
Heiko> (\"\" . \"/usr/local/emacs/src/\")
Heiko> ))
Heiko> This means that anything in the /usr/src/public/perl/ directory should use
Heiko> the TAGS file /usr/src/public/perl/perl-3.0/TAGS; and file ending in .el should
Heiko> use the TAGS file /usr/local/emacs/src/TAGS; and anything in or below the
Heiko> directory /jbw/gnu/ should use the TAGS file /usr15/degree/stud/jbw/gnu/TAGS.
Heiko> A file called something like \"/usr/jbw/foo.el\" would use both the
TAGS files
Heiko> /usr/local/emacs/src/TAGS and /usr15/degree/stud/jbw/gnu/TAGS (in that order)
Heiko> because it matches both patterns.
Heiko> If the buffer-local variable `buffer-tag-table' is set, then it names a
tags
Heiko> table that is searched before all others when find-tag is executed from this
Heiko> buffer.
Heiko> If there is a file called \"TAGS\" in the same directory as the file
in
Heiko> question, then that tags file will always be used as well (after the
Heiko> `buffer-tag-table' but before the tables specified by this list.)
Heiko> If the variable tags-file-name is set, then the tags file it names will apply
Heiko> to all buffers (for backwards compatibility.) It is searched first."
Heiko> :type '(repeat (cons :format "%v"
Heiko> (choice :value ""
Heiko> (regexp :tag "Buffer regexp")
Heiko> sexp)
Heiko> (choice :value ""
Heiko> (string :tag "Tag file or directory")
Heiko> sexp)))
Heiko> :group 'etags)
Heiko> (defvar buffer-tag-table nil
Heiko> "*The additional name of one TAGS table to be used for this buffer.
Heiko> You can set this with `\\[set-buffer-tag-table]'. See the documentation
Heiko> for the variable `tag-table-alist' for more information.")
Heiko> (make-variable-buffer-local 'buffer-tag-table)
Heiko> (defvar tags-file-name nil
Heiko> "The name of the tags-table used by all buffers.
Heiko> This is for backwards compatibility, and is largely supplanted by the
Heiko> variable tag-table-alist.")
Heiko> (defcustom tags-auto-read-changed-tag-files nil
Heiko> "*If non-nil, always re-read changed TAGS file without prompting.
Heiko> If nil, prompt whether to re-read the changed TAGS file."
Heiko> :type 'boolean
Heiko> :group 'etags)
Heiko> (defcustom make-tags-files-invisible nil
Heiko> "*If non-nil, TAGS-files will not show up in buffer-lists or be
Heiko> selectable (or deletable.)"
Heiko> :type 'boolean
Heiko> :group 'etags)
Heiko> (defcustom tags-search-nuke-uninteresting-buffers t
Heiko> "*If non-nil, keep newly-visited files if they contain the search
target.
Heiko> This affects the `tags-search' and `tags-query-replace' commands."
Heiko> :type 'boolean
Heiko> :group 'etags)
Heiko>
Heiko> ;; Buffer tag tables.
Heiko> (defun buffer-tag-table-list ()
Heiko> "Returns a list (ordered) of the tags tables which should be used for
Heiko> the current buffer."
Heiko> (let (result)
Heiko> ;; Explicitly set buffer-tag-table
Heiko> (when buffer-tag-table
Heiko> (push buffer-tag-table result))
Heiko> ;; Current directory
Heiko> (when (file-readable-p (concat default-directory "TAGS"))
Heiko> (push (concat default-directory "TAGS") result))
Heiko> ;; Parent directory
Heiko> (let ((parent-tag-file (expand-file-name "../TAGS"
default-directory)))
Heiko> (when (file-readable-p parent-tag-file)
Heiko> (push parent-tag-file result)))
Heiko> ;; tag-table-alist
Heiko> (let ((key (or buffer-file-name
Heiko> (concat default-directory (buffer-name))))
Heiko> expression)
Heiko> (dolist (item tag-table-alist)
Heiko> (setq expression (car item))
Heiko> ;; If the car of the alist item is a string, apply it as a regexp
Heiko> ;; to the buffer-file-name. Otherwise, evaluate it. If the
Heiko> ;; regexp matches, or the expression evaluates non-nil, then this
Heiko> ;; item in tag-table-alist applies to this buffer.
Heiko> (when (if (stringp expression)
Heiko> (string-match expression key)
Heiko> (ignore-errors
Heiko> (eval expression)))
Heiko> ;; Now evaluate the cdr of the alist item to get the name of
Heiko> ;; the tag table file.
Heiko> (setq expression (ignore-errors
Heiko> (eval (cdr item))))
Heiko> (if (stringp expression)
Heiko> (push expression result)
Heiko> (error "Expression in tag-table-alist evaluated to
non-string")))))
Heiko> (setq result
Heiko> (mapcar
Heiko> (lambda (name)
Heiko> (when (file-directory-p name)
Heiko> (setq name (concat (file-name-as-directory name) "TAGS")))
Heiko> (and (file-readable-p name)
Heiko> ;; get-tag-table-buffer has side-effects
Heiko> (symbol-value-in-buffer 'buffer-file-name
Heiko> (get-tag-table-buffer name))))
Heiko> result))
Heiko> (setq result (delq nil result))
Heiko> ;; If no TAGS file has been found, ask the user explicitly.
Heiko> ;; #### tags-file-name is *evil*.
Heiko> (or result tags-file-name
Heiko> (call-interactively 'visit-tags-table))
Heiko> (when tags-file-name
Heiko> (setq result (nconc result (list tags-file-name))))
Heiko> (or result (error "Buffer has no associated tag tables"))
Heiko> (delete-duplicates (nreverse result) :test 'equal)))
Heiko> ;;;###autoload
Heiko> (defun visit-tags-table (file)
Heiko> "Tell tags commands to use tags table file FILE when all else fails.
Heiko> FILE should be the name of a file created with the `etags' program.
Heiko> A directory name is ok too; it means file TAGS in that directory."
Heiko> (interactive (list (read-file-name "Visit tags table: (default TAGS)
"
Heiko> default-directory
Heiko> (expand-file-name "TAGS" default-directory)
Heiko> t)))
Heiko> (if (string-equal file "")
Heiko> (setq tags-file-name nil)
Heiko> (setq file (expand-file-name file))
Heiko> (when (file-directory-p file)
Heiko> (setq file (expand-file-name "TAGS" file)))
Heiko> ;; It used to be that, if a user pressed RET by mistake, the bogus
Heiko> ;; `tags-file-name' would remain, causing the error at
Heiko> ;; `buffer-tag-table'.
Heiko> (when (file-exists-p file)
Heiko> (setq tags-file-name file))))
Heiko> (defun set-buffer-tag-table (file)
Heiko> "In addition to the tags tables specified by the variable
`tag-table-alist',
Heiko> each buffer can have one additional table. This command sets that.
Heiko> See the documentation for the variable `tag-table-alist' for more
information."
Heiko> (interactive
Heiko> (list
Heiko> (read-file-name "Visit tags table: (directory sufficient) "
Heiko> nil default-directory t)))
Heiko> (or file (error "No TAGS file name supplied"))
Heiko> (setq file (expand-file-name file))
Heiko> (when (file-directory-p file)
Heiko> (setq file (expand-file-name "TAGS" file)))
Heiko> (or (file-exists-p file) (error "TAGS file missing: %s" file))
Heiko> (setq buffer-tag-table file))
Heiko>
Heiko> ;; Manipulating the tag table buffer
Heiko> (defconst tag-table-completion-status nil
Heiko> "Indicates whether a completion table has been built.
Heiko> Either nil, t, or `disabled'.")
Heiko> (make-variable-buffer-local 'tag-table-completion-status)
Heiko> (defconst tag-table-files nil
Heiko> "If the current buffer is a TAGS table, this holds a list of the files
Heiko> referenced by this file, or nil if that hasn't been computed yet.")
Heiko> (make-variable-buffer-local 'tag-table-files)
Heiko> (defun get-tag-table-buffer (tag-table)
Heiko> "Returns a buffer visiting the given TAGS table.
Heiko> If appropriate, reverting the buffer, and possibly build a
completion-table."
Heiko> (or (stringp tag-table)
Heiko> (error "Bad tags file name supplied: %s" tag-table))
Heiko> ;; Remove symbolic links from name.
Heiko> (setq tag-table (symlink-expand-file-name tag-table))
Heiko> (let (buf build-completion check-name)
Heiko> (setq buf (get-file-buffer tag-table))
Heiko> (unless buf
Heiko> (if (file-readable-p tag-table)
Heiko> (setq buf (find-file-noselect tag-table)
Heiko> check-name t)
Heiko> (error "No such tags file: %s" tag-table)))
Heiko> (with-current-buffer buf
Heiko> ;; Make the TAGS buffer invisible.
Heiko> (when (and check-name
Heiko> make-tags-files-invisible
Heiko> (string-match "\\`[^ ]" (buffer-name)))
Heiko> (rename-buffer (generate-new-buffer-name
Heiko> (concat " " (buffer-name)))))
Heiko> (or (verify-visited-file-modtime buf)
Heiko> (cond ((or tags-auto-read-changed-tag-files
Heiko> (yes-or-no-p
Heiko> (format "Tags file %s has changed, read new contents? "
Heiko> tag-table)))
Heiko> (when tags-auto-read-changed-tag-files
Heiko> (message "Tags file %s has changed, reading new contents..."
Heiko> tag-table))
Heiko> (revert-buffer t t)
Heiko> (when (eq tag-table-completion-status t)
Heiko> (setq tag-table-completion-status nil))
Heiko> (setq tag-table-files nil))))
Heiko> (or (eq (char-after 1) ?\f)
Heiko> (error "File %s not a valid tags file" tag-table))
Heiko> (or (memq tag-table-completion-status '(t disabled))
Heiko> (setq build-completion t))
Heiko> (when build-completion
Heiko> (if (ecase tags-build-completion-table
Heiko> ((nil) nil)
Heiko> ((t) t)
Heiko> ((ask)
Heiko> ;; don't bother asking for small ones
Heiko> (or (< (buffer-size) 20000)
Heiko> (y-or-n-p
Heiko> (format "Build tag completion table for %s? "
Heiko> tag-table)))))
Heiko> ;; The user wants to build the table:
Heiko> (condition-case nil
Heiko> (progn
Heiko> (add-to-tag-completion-table)
Heiko> (setq tag-table-completion-status t))
Heiko> ;; Allow user to C-g out correctly
Heiko> (quit
Heiko> (message "Tags completion table construction aborted")
Heiko> (setq tag-table-completion-status nil
Heiko> quit-flag t)
Heiko> t))
Heiko> ;; The table is verboten.
Heiko> (setq tag-table-completion-status 'disabled))))
Heiko> buf))
Heiko> (defun file-of-tag ()
Heiko> "Return the file name of the file whose tags point is within.
Heiko> Assumes the tag table is the current buffer.
Heiko> File name returned is relative to tag table file's directory."
Heiko> (let ((opoint (point))
Heiko> prev size)
Heiko> (save-excursion
Heiko> (goto-char (point-min))
Heiko> (while (< (point) opoint)
Heiko> (forward-line 1)
Heiko> (end-of-line)
Heiko> (skip-chars-backward "^,\n")
Heiko> (setq prev (point)
Heiko> size (read (current-buffer)))
Heiko> (goto-char prev)
Heiko> (forward-line 1)
Heiko> ;; New include syntax
Heiko> ;; filename,include
Heiko> ;; tacked on to the end of a tag file means use filename
Heiko> ;; as a tag file before giving up.
Heiko> ;; Skip it here.
Heiko> (unless (eq size 'include)
Heiko> (forward-char size)))
Heiko> (goto-char (1- prev))
Heiko> (buffer-substring (point) (point-at-bol)))))
Heiko> (defun tag-table-include-files ()
Heiko> "Return all file names associated with `include' directives in a tag
buffer."
Heiko> ;; New include syntax
Heiko> ;; filename,include
Heiko> ;; tacked on to the end of a tag file means use filename as a
Heiko> ;; tag file before giving up.
Heiko> (let ((files nil))
Heiko> (save-excursion
Heiko> (goto-char (point-min))
Heiko> (while (re-search-forward "\f\n\\(.*\\),include$" nil t)
Heiko> (push (match-string 1) files)))
Heiko> files))
Heiko> (defun tag-table-files (tag-table)
Heiko> "Returns a list of the files referenced by the named TAGS table."
Heiko> (with-current-buffer (get-tag-table-buffer tag-table)
Heiko> (unless tag-table-files
Heiko> (let (files prev size)
Heiko> (goto-char (point-min))
Heiko> (while (not (eobp))
Heiko> (forward-line 1)
Heiko> (end-of-line)
Heiko> (skip-chars-backward "^,\n")
Heiko> (setq prev (point)
Heiko> size (read (current-buffer)))
Heiko> (goto-char prev)
Heiko> (push (expand-file-name (buffer-substring (1- (point))
Heiko> (point-at-bol))
Heiko> default-directory)
Heiko> files)
Heiko> (forward-line 1)
Heiko> (forward-char size))
Heiko> (setq tag-table-files (nreverse files))))
Heiko> tag-table-files))
Heiko> ;; #### should this be on previous page?
Heiko> (defun buffer-tag-table-files ()
Heiko> "Returns a list of all files referenced by all TAGS tables that
Heiko> this buffer uses."
Heiko> (apply #'nconc
Heiko> (mapcar #'tag-table-files (buffer-tag-table-list))))
Heiko>
Heiko> ;; Building the completion table
Heiko> ;; Test cases for building completion table; must handle these properly:
Heiko> ;; Lisp_Int, XSETINT, current_column 60,2282
Heiko> ;; Lisp_Int, XSETINT, point>NumCharacters ? 0 : CharAt(363,9935
Heiko> ;; Lisp_Int, XSETINT, point<=FirstCharacter ? 0 : CharAt(366,10108
Heiko> ;; point<=FirstCharacter || CharAt(378,10630
Heiko> ;; point>NumCharacters || CharAt(382,10825
Heiko> ;; DEFUN ("x-set-foreground-color", Fx_set_foreground_color,191,4562
Heiko> ;; DEFUN ("x-set-foreground-color", Fx_set_foreground_color,191,4562
Heiko> ;; DEFUN ("*", Ftimes,1172,32079
Heiko> ;; DEFUN ("/=", Fneq,1035,28839
Heiko> ;; defun_internal 4199,101362
Heiko> ;; int pure[PURESIZE / sizeof 53,1564
Heiko> ;; char staticvec1[NSTATICS * sizeof 667,17608
Heiko> ;; Date: 04 May 87 23:53:11 PDT 26,1077
Heiko> ;; #define anymacroname(324,4344
Heiko> ;; (define-key ctl-x-map 311,11784
Heiko> ;; (define-abbrev-table 'c-mode-abbrev-table 24,1016
Heiko> ;; static char *skip_white(116,3443
Heiko> ;; static foo 348,11643
Heiko> ;; (defun texinfo-insert-＠code 91,3358
Heiko> ;; (defvar texinfo-kindex)29,1105
Heiko> ;; (defun texinfo-format-\. 548,18376
Heiko> ;; (defvar sm::menu-kludge-y 621,22726
Heiko> ;; (defvar *mouse-drag-window* 103,3642
Heiko> ;; (defun simula-back-level(317,11263
Heiko> ;; } DPxAC,380,14024
Heiko> ;; } BM_QCB;69,2990
Heiko> ;; #define MTOS_DONE\t
Heiko> ;; "^[^ ]+ +\\([^ ]+\\) "
Heiko> ;; void *find_cactus_segment(116,2444
Heiko> ;; void *find_pdb_segment(162,3688
Heiko> ;; void init_dclpool(410,10739
Heiko> ;; WORD insert_draw_command(342,8881
Heiko> ;; void *req_pdbmem(579,15574
Heiko> (defvar tag-completion-table (make-vector 511 0))
Heiko> (defvar tag-symbol)
Heiko> (defvar tag-table-symbol)
Heiko> (defvar tag-symbol-tables)
Heiko> (defvar buffer-tag-table-list)
Heiko> (defmacro intern-tag-symbol (tag)
Heiko> `(progn
Heiko> (setq tag-symbol (intern ,tag tag-completion-table)
Heiko> tag-symbol-tables (and (boundp tag-symbol)
Heiko> (symbol-value tag-symbol)))
Heiko> (or (memq tag-table-symbol tag-symbol-tables)
Heiko> (set tag-symbol (cons tag-table-symbol tag-symbol-tables)))))
Heiko> ;; Can't use "\\s " in these patterns because that will include
newline
Heiko> (defconst tags-DEFUN-pattern
Heiko> "DEFUN[ \t]*(\"\\([^\"]+\\)\",[
\t]*\\(\\(\\sw\\|\\s_\\)+\\),\C-?")
Heiko> (defconst tags-array-pattern ".*[ \t]+\\([^ \[]+\\)\\[")
Heiko> (defconst tags-def-pattern
Heiko> "\\(.*[ \t]+\\)?\\**\\(\\(\\sw\\|\\s_\\)+\\)[ ();,\t]*\C-?"
Heiko> ;; "\\(.*[ \t]+\\)?\\(\\(\\sw\\|\\s_\\)+\\)[ ()]*\C-?"
Heiko> ;; "\\(\\sw\\|\\s_\\)+[ ()]*\C-?"
Heiko> )
Heiko> (defconst tags-file-pattern "^\f\n\\(.+\\),[0-9]+\n")
Heiko> ;; #### Should make it work with the `include' directive!
Heiko> (defun add-to-tag-completion-table ()
Heiko> "Sucks the current buffer (a TAGS table) into the
completion-table."
Heiko> (message "Adding %s to tags completion table..." buffer-file-name)
Heiko> (goto-char (point-min))
Heiko> (let ((tag-table-symbol (intern buffer-file-name tag-completion-table))
Heiko> ;; tag-table-symbol is used by intern-tag-symbol
Heiko> filename file-type name name2 tag-symbol
Heiko> tag-symbol-tables
Heiko> (case-fold-search nil))
Heiko> ;; Loop over the files mentioned in the TAGS file for each file,
Heiko> ;; try to find its major-mode, then process tags appropriately.
Heiko> (while (looking-at tags-file-pattern)
Heiko> (goto-char (match-end 0))
Heiko> (setq filename (file-name-sans-versions (match-string 1))
Heiko> ;; We used to check auto-mode-alist for the proper
Heiko> ;; file-type. This was way too slow, as it had to process
Heiko> ;; an enormous amount of regexps for each time. Now we
Heiko> ;; use the shotgun approach with only two regexps.
Heiko> file-type (cond ((string-match "\\.\\([cC]\\|cc\\|cxx\\)\\'"
Heiko> filename)
Heiko> 'c-mode)
Heiko> ((string-match "\\.\\(el\\|cl\\|lisp\\)\\'"
Heiko> filename)
Heiko> 'lisp-mode)
Heiko> ((string-match "\\.scm\\'" filename)
Heiko> 'scheme-mode)
Heiko> (t nil)))
Heiko> (set-syntax-table (cond ((and (eq file-type 'c-mode)
Heiko> c-mode-syntax-table)
Heiko> c-mode-syntax-table)
Heiko> ((eq file-type 'lisp-mode)
Heiko> lisp-mode-syntax-table)
Heiko> (t (standard-syntax-table))))
Heiko> ;; Clear loop variables.
Heiko> (setq name nil name2 nil)
Heiko> (lmessage 'progress "%s..." filename)
Heiko> ;; Loop over the individual tag lines.
Heiko> (while (not (or (eobp) (eq (char-after) ?\f)))
Heiko> (cond ((and (eq file-type 'c-mode)
Heiko> (looking-at "DEFUN[ \t]"))
Heiko> ;; DEFUN
Heiko> (or (looking-at tags-DEFUN-pattern)
Heiko> (error "DEFUN doesn't fit pattern"))
Heiko> (setq name (match-string 1)
Heiko> name2 (match-string 2)))
Heiko> ;;((looking-at "\\s ")
Heiko> ;; skip probably bogus entry:
Heiko> ;;)
Heiko> ((and (eq file-type 'c-mode)
Heiko> (looking-at ".*\\["))
Heiko> ;; Array
Heiko> (cond ((not (looking-at tags-array-pattern))
Heiko> (message "array definition doesn't fit pattern")
Heiko> (setq name nil))
Heiko> (t
Heiko> (setq name (match-string 1)))))
Heiko> ((and (eq file-type 'scheme-mode)
Heiko> (looking-at
"\\s-*(\\s-*def\\sw*\\s-*(?\\s-*\\(\\(\\sw\\|\\s_\\|:\\)+\\))?\\s-*\C-?"))
Heiko> ;; Something Schemish (is this really necessary??)
Heiko> (setq name (match-string 1)))
Heiko> ((looking-at tags-def-pattern)
Heiko> ;; ???
Heiko> (setq name (match-string 2))))
Heiko> ;; add the tags we found to the completion table
Heiko> (and name (intern-tag-symbol name))
Heiko> (and name2 (intern-tag-symbol name2))
Heiko> (forward-line 1)))
Heiko> (or (eobp) (error "Bad TAGS file")))
Heiko> (message "Adding %s to tags completion table...done"
buffer-file-name))
Heiko>
Heiko> ;; Interactive find-tag
Heiko> (defvar find-tag-default-hook nil
Heiko> "Function to call to create a default tag.
Heiko> Make it buffer-local in a mode hook. The function is called with no
Heiko> arguments.")
Heiko> (defvar find-tag-hook nil
Heiko> "Function to call after a tag is found.
Heiko> Make it buffer-local in a mode hook. The function is called with no
Heiko> arguments.")
Heiko> ;; Return a default tag to search for, based on the text at point.
Heiko> (defun find-tag-default ()
Heiko> (or (and (not (memq find-tag-default-hook '(nil find-tag-default)))
Heiko> (condition-case data
Heiko> (funcall find-tag-default-hook)
Heiko> (error
Heiko> (warn "Error in find-tag-default-hook signalled error: %s"
Heiko> (error-message-string data))
Heiko> nil)))
Heiko> (symbol-near-point)))
Heiko> ;; This function depends on the following symbols being bound properly:
Heiko> ;; buffer-tag-table-list,
Heiko> ;; tag-symbol-tables (value irrelevant, bound outside for efficiency)
Heiko> (defun tag-completion-predicate (tag-symbol)
Heiko> (and (boundp tag-symbol)
Heiko> (setq tag-symbol-tables (symbol-value tag-symbol))
Heiko> (catch 'found
Heiko> (while tag-symbol-tables
Heiko> (when (memq (car tag-symbol-tables) buffer-tag-table-list)
Heiko> (throw 'found t))
Heiko> (setq tag-symbol-tables (cdr tag-symbol-tables))))))
Heiko> (defun buffer-tag-table-symbol-list ()
Heiko> (mapcar (lambda (table-name)
Heiko> (intern table-name tag-completion-table))
Heiko> (buffer-tag-table-list)))
Heiko> (defvar find-tag-history nil "History list for find-tag-tag.")
Heiko> (defun find-tag-tag (prompt)
Heiko> (let* ((default (find-tag-default))
Heiko> (buffer-tag-table-list (buffer-tag-table-symbol-list))
Heiko> tag-symbol-tables tag-name)
Heiko> (setq tag-name
Heiko> (completing-read
Heiko> (if default
Heiko> (format "%s(default %s) " prompt default)
Heiko> prompt)
Heiko> tag-completion-table 'tag-completion-predicate nil nil
Heiko> 'find-tag-history))
Heiko> (if (string-equal tag-name "")
Heiko> ;; #### - This is a really LAME way of doing it! --Stig
Heiko> default ;indicate exact symbol match
Heiko> tag-name)))
Heiko> (defvar last-tag-data nil
Heiko> "Information for continuing a tag search.
Heiko> Is of the form (TAG POINT MATCHING-EXACT TAG-TABLE TAG-TABLE ...).")
Heiko> (defvar tags-loop-operate nil
Heiko> "Form for `tags-loop-continue' to eval to change one file.")
Heiko> (defvar tags-loop-scan
Heiko> '(error "%s" (substitute-command-keys
Heiko> "No \\[tags-search] or \\[tags-query-replace] in progress."))
Heiko> "Form for `tags-loop-continue' to eval to scan one file.
Heiko> If it returns non-nil, this file needs processing by evalling
Heiko> \`tags-loop-operate'. Otherwise, move on to the next file.")
Heiko> (autoload 'get-symbol-syntax-table "symbol-syntax")
Heiko> (defun find-tag-internal (tagname)
Heiko> (let ((next (null tagname))
Heiko> (tmpnext (null tagname))
Heiko> ;; If tagname is a list: (TAGNAME), this indicates
Heiko> ;; requiring an exact symbol match.
Heiko> (exact (or tags-always-exact (consp tagname)))
Heiko> (normal-syntax-table (syntax-table))
Heiko> (exact-syntax-table (get-symbol-syntax-table (syntax-table)))
Heiko> tag-table-currently-matching-exact
Heiko> tag-target exact-tagname
Heiko> tag-tables tag-table-point file linebeg startpos buf
Heiko> offset found pat syn-tab)
Heiko> (when (consp tagname)
Heiko> (setq tagname (car tagname)))
Heiko> (cond (next
Heiko> (setq tagname (car last-tag-data))
Heiko> (setq tag-table-currently-matching-exact
Heiko> (car (cdr (cdr last-tag-data)))))
Heiko> (t
Heiko> (setq tag-table-currently-matching-exact t)))
Heiko> (setq exact-tagname (concat "\C-?" tagname "\C-A"))
Heiko> (save-excursion
Heiko> (catch 'found
Heiko> ;; Loop searching for exact matches and then inexact matches.
Heiko> (while (not (eq tag-table-currently-matching-exact 'neither))
Heiko> (cond (tmpnext
Heiko> (setq tag-tables (cdr (cdr (cdr last-tag-data)))
Heiko> tag-table-point (car (cdr last-tag-data)))
Heiko> ;; Start from the beginning of the table list on the
Heiko> ;; next iteration of the loop.
Heiko> (setq tmpnext nil))
Heiko> (t
Heiko> (setq tag-tables (buffer-tag-table-list)
Heiko> tag-table-point 1)))
Heiko> (if tag-table-currently-matching-exact
Heiko> (setq tag-target exact-tagname
Heiko> syn-tab exact-syntax-table)
Heiko> (setq tag-target tagname
Heiko> syn-tab normal-syntax-table))
Heiko> (with-search-caps-disable-folding tag-target t
Heiko> (while tag-tables
Heiko> (set-buffer (get-tag-table-buffer (car tag-tables)))
Heiko> (bury-buffer (current-buffer))
Heiko> (goto-char (or tag-table-point (point-min)))
Heiko> (setq tag-table-point nil)
Heiko> (letf (((syntax-table) syn-tab)
Heiko> (case-fold-search nil))
Heiko> ;; #### should there be support for non-regexp
Heiko> ;; tag searches?
Heiko> (while (re-search-forward tag-target nil t)
Heiko> (and
Heiko> ;; If we're looking for inexact matches, skip
Heiko> ;; exact matches since we've visited them
Heiko> ;; already.
Heiko> (or tag-table-currently-matching-exact
Heiko> (letf (((syntax-table) exact-syntax-table))
Heiko> (save-excursion
Heiko> (goto-char (match-beginning 0))
Heiko> (not (looking-at exact-tagname)))))
Heiko> (throw 'found t))))
Heiko> (setq tag-tables
Heiko> (nconc (tag-table-include-files) (cdr tag-tables)))))
Heiko> (if (and (not exact) (eq tag-table-currently-matching-exact t))
Heiko> (setq tag-table-currently-matching-exact nil)
Heiko> (setq tag-table-currently-matching-exact 'neither)))
Heiko> (error "No %sentries %s %s"
Heiko> (if next "more " "")
Heiko> (if exact "matching" "containing")
Heiko> tagname))
Heiko> (search-forward "\C-?")
Heiko> (setq file (expand-file-name (file-of-tag)
Heiko> ;; In XEmacs, this needs to be
Heiko> ;; relative to:
Heiko> (or (file-name-directory (car tag-tables))
Heiko> "./")))
Heiko> (setq linebeg (buffer-substring (1- (point)) (point-at-bol)))
Heiko> (search-forward ",")
Heiko> (setq startpos (read (current-buffer)))
Heiko> (setq last-tag-data
Heiko> (nconc (list tagname (point) tag-table-currently-matching-exact)
Heiko> tag-tables))
Heiko> (setq buf (find-file-noselect file))
Heiko> (with-current-buffer buf
Heiko> (save-excursion
Heiko> (save-restriction
Heiko> (widen)
Heiko> ;; Here we search for PAT in the range [STARTPOS - OFFSET,
Heiko> ;; STARTPOS + OFFSET], with increasing values of OFFSET.
Heiko> ;;
Heiko> ;; We used to set the initial offset to 1000, but the
Heiko> ;; actual sources show that finer-grained control is
Heiko> ;; needed (e.g. two `hash_string's in src/symbols.c.) So,
Heiko> ;; I changed 100 to 100, and (* 3 offset) to (* 5 offset).
Heiko> (setq offset 100)
Heiko> (setq pat (concat "^" (regexp-quote linebeg)))
Heiko> (or startpos (setq startpos (point-min)))
Heiko> (while (and (not found)
Heiko> (progn
Heiko> (goto-char (- startpos offset))
Heiko> (not (bobp))))
Heiko> (setq found (re-search-forward pat (+ startpos offset) t))
Heiko> (setq offset (* 5 offset)))
Heiko> ;; Finally, try finding it anywhere in the buffer.
Heiko> (or found
Heiko> (re-search-forward pat nil t)
Heiko> (error "%s not found in %s" pat file))
Heiko> (beginning-of-line)
Heiko> (setq startpos (point)))))
Heiko> (cons buf startpos))))
Heiko> ;;;###autoload
Heiko> (defun find-tag (tagname &optional other-window)
Heiko> "*Find tag whose name contains TAGNAME.
Heiko> Selects the buffer that the tag is contained in
Heiko> and puts point at its definition.
Heiko> If TAGNAME is a null string, the expression in the buffer
Heiko> around or before point is used as the tag name.
Heiko> If called interactively with a numeric argument, searches for the next tag
Heiko> in the tag table that matches the tagname used in the previous find-tag.
Heiko> If second arg OTHER-WINDOW is non-nil, uses another window to display
Heiko> the tag.
Heiko> This version of this function supports multiple active tags tables,
Heiko> and completion.
Heiko> Variables of note:
Heiko> tag-table-alist controls which tables apply to which buffers
Heiko> tags-file-name a default tags table
Heiko> tags-build-completion-table controls completion behavior
Heiko> buffer-tag-table another way of specifying a buffer-local table
Heiko> make-tags-files-invisible whether tags tables should be very hidden
Heiko> tag-mark-stack-max how many tags-based hops to remember"
Heiko> (interactive (if current-prefix-arg
Heiko> '(nil nil)
Heiko> (list (find-tag-tag "Find tag: ") nil)))
Heiko> (let* ((local-find-tag-hook find-tag-hook)
Heiko> (next (null tagname))
Heiko> (result (find-tag-internal tagname))
Heiko> (tag-buf (car result))
Heiko> (tag-point (cdr result)))
Heiko> ;; Push old position on the tags mark stack.
Heiko> (if (or (not next)
Heiko> (not (memq last-command
Heiko> '(find-tag find-tag-other-window tags-loop-continue))))
Heiko> (push-tag-mark))
Heiko> (if other-window
Heiko> (pop-to-buffer tag-buf)
Heiko> (switch-to-buffer tag-buf))
Heiko> (widen)
Heiko> (push-mark)
Heiko> (goto-char tag-point)
Heiko> (if find-tag-hook
Heiko> (funcall find-tag-hook)
Heiko> (if local-find-tag-hook
Heiko> (funcall local-find-tag-hook))))
Heiko> (setq tags-loop-scan (list 'find-tag nil nil)
Heiko> tags-loop-operate nil)
Heiko> ;; Return t in case used as the tags-loop-scan.
Heiko> t)
Heiko> ;;;###autoload
Heiko> (defun find-tag-other-window (tagname &optional next)
Heiko> "*Find tag whose name contains TAGNAME.
Heiko> Selects the buffer that the tag is contained in in another window
Heiko> and puts point at its definition.
Heiko> If TAGNAME is a null string, the expression in the buffer
Heiko> around or before point is used as the tag name.
Heiko> If second arg NEXT is non-nil (interactively, with prefix arg),
Heiko> searches for the next tag in the tag table
Heiko> that matches the tagname used in the previous find-tag.
Heiko> This version of this function supports multiple active tags tables,
Heiko> and completion.
Heiko> Variables of note:
Heiko> tag-table-alist controls which tables apply to which buffers
Heiko> tags-file-name a default tags table
Heiko> tags-build-completion-table controls completion behavior
Heiko> buffer-tag-table another way of specifying a buffer-local table
Heiko> make-tags-files-invisible whether tags tables should be very hidden
Heiko> tag-mark-stack-max how many tags-based hops to remember"
Heiko> (interactive (if current-prefix-arg
Heiko> '(nil t)
Heiko> (list (find-tag-tag "Find tag other window: "))))
Heiko> (if next
Heiko> (find-tag nil t)
Heiko> (find-tag tagname t)))
Heiko>
Heiko> ;; Completion on tags in the buffer.
Heiko> (defun complete-symbol (&optional table predicate prettify)
Heiko> (let* ((end (point))
Heiko> (beg (save-excursion
Heiko> (backward-sexp 1)
Heiko> ;;(while (= (char-syntax (following-char)) ?\')
Heiko> ;; (forward-char 1))
Heiko> (skip-syntax-forward "'")
Heiko> (point)))
Heiko> (pattern (buffer-substring beg end))
Heiko> (table (or table obarray))
Heiko> (completion (try-completion pattern table predicate)))
Heiko> (cond ((eq completion t))
Heiko> ((null completion)
Heiko> (error "Can't find completion for \"%s\"" pattern))
Heiko> ((not (string-equal pattern completion))
Heiko> (delete-region beg end)
Heiko> (insert completion))
Heiko> (t
Heiko> (message "Making completion list...")
Heiko> (let ((list (all-completions pattern table predicate)))
Heiko> (if prettify
Heiko> (setq list (funcall prettify list)))
Heiko> (with-output-to-temp-buffer "*Help*"
Heiko> (display-completion-list list)))
Heiko> (message "Making completion list...%s" "done")))))
Heiko> ;;;###autoload
Heiko> (defun tag-complete-symbol ()
Heiko> "The function used to do tags-completion (using
'tag-completion-predicate)."
Heiko> (interactive)
Heiko> (let* ((buffer-tag-table-list (buffer-tag-table-symbol-list))
Heiko> tag-symbol-tables)
Heiko> (complete-symbol tag-completion-table 'tag-completion-predicate)))
Heiko>
Heiko> ;; Applying a command to files mentioned in tag tables
Heiko> (defvar next-file-list nil
Heiko> "List of files for next-file to process.")
Heiko> ;;;###autoload
Heiko> (defun next-file (&optional initialize novisit)
Heiko> "Select next file among files in current tag table(s).
Heiko> A first argument of t (prefix arg, if interactive) initializes to the
Heiko> beginning of the list of files in the (first) tags table. If the argument
Heiko> is neither nil nor t, it is evalled to initialize the list of files.
Heiko> Non-nil second argument NOVISIT means use a temporary buffer
Heiko> to save time and avoid uninteresting warnings.
Heiko> Value is nil if the file was already visited;
Heiko> if the file was newly read in, the value is the filename."
Heiko> (interactive "P")
Heiko> (cond ((not initialize)
Heiko> ;; Not the first run.
Heiko> )
Heiko> ((eq initialize t)
Heiko> ;; Initialize the list from the tags table.
Heiko> (setq next-file-list (buffer-tag-table-files)))
Heiko> (t
Heiko> ;; Initialize the list by evalling the argument.
Heiko> (setq next-file-list (eval initialize))))
Heiko> (when (null next-file-list)
Heiko> (and novisit
Heiko> (get-buffer " *next-file*")
Heiko> (kill-buffer " *next-file*"))
Heiko> (error "All files processed"))
Heiko> (let* ((file (car next-file-list))
Heiko> (buf (get-file-buffer file))
Heiko> (new (not buf)))
Heiko> (pop next-file-list)
Heiko> (if (not (and new novisit))
Heiko> (switch-to-buffer (find-file-noselect file novisit) t)
Heiko> ;; Like find-file, but avoids random junk.
Heiko> (set-buffer (get-buffer-create " *next-file*"))
Heiko> (kill-all-local-variables)
Heiko> (erase-buffer)
Heiko> (insert-file-contents file nil))
Heiko> (widen)
Heiko> (when (> (point) (point-min))
Heiko> (push-mark nil t)
Heiko> (goto-char (point-min)))
Heiko> (and new file)))
Heiko> ;;;###autoload
Heiko> (defun tags-loop-continue (&optional first-time)
Heiko> "Continue last \\[tags-search] or \\[tags-query-replace] command.
Heiko> Used noninteractively with non-nil argument to begin such a command (the
Heiko> argument is passed to `next-file', which see).
Heiko> Two variables control the processing we do on each file:
Heiko> the value of `tags-loop-scan' is a form to be executed on each file
Heiko> to see if it is interesting (it returns non-nil if so)
Heiko> and `tags-loop-operate' is a form to execute to operate on an interesting
file
Heiko> If the latter returns non-nil, we exit; otherwise we scan the next file."
Heiko> (interactive)
Heiko> (let ((messaged nil)
Heiko> (more-files-p t)
Heiko> new)
Heiko> (while more-files-p
Heiko> ;; Scan files quickly for the first or next interesting one.
Heiko> (while (or first-time
Heiko> (save-restriction
Heiko> (widen)
Heiko> (not (eval tags-loop-scan))))
Heiko> (setq new (next-file first-time
Heiko> tags-search-nuke-uninteresting-buffers))
Heiko> ;; If NEW is non-nil, we got a temp buffer,
Heiko> ;; and NEW is the file name.
Heiko> (if (or messaged
Heiko> (and (not first-time)
Heiko> (> (device-baud-rate) search-slow-speed)
Heiko> (setq messaged t)))
Heiko> (lmessage 'progress
Heiko> "Scanning file %s..." (or new buffer-file-name)))
Heiko> (setq first-time nil)
Heiko> (goto-char (point-min)))
Heiko> ;; If we visited it in a temp buffer, visit it now for real.
Heiko> (if (and new tags-search-nuke-uninteresting-buffers)
Heiko> (let ((pos (point)))
Heiko> (erase-buffer)
Heiko> (set-buffer (find-file-noselect new))
Heiko> (widen)
Heiko> (goto-char pos)))
Heiko> (switch-to-buffer (current-buffer))
Heiko> ;; Now operate on the file.
Heiko> ;; If value is non-nil, continue to scan the next file.
Heiko> (setq more-files-p (eval tags-loop-operate)))
Heiko> (and messaged
Heiko> (null tags-loop-operate)
Heiko> (message "Scanning file %s...found" buffer-file-name))))
Heiko> ;;;###autoload
Heiko> (defun tags-search (regexp &optional file-list-form)
Heiko> "Search through all files listed in tags table for match for REGEXP.
Heiko> Stops when a match is found.
Heiko> To continue searching for next match, use command \\[tags-loop-continue].
Heiko> See documentation of variable `tag-table-alist'."
Heiko> (interactive "sTags search (regexp): ")
Heiko> (if (and (equal regexp "")
Heiko> (eq (car tags-loop-scan) 'with-search-caps-disable-folding)
Heiko> (null tags-loop-operate))
Heiko> ;; Continue last tags-search as if by `M-,'.
Heiko> (tags-loop-continue nil)
Heiko> (setq tags-loop-scan `(with-search-caps-disable-folding ,regexp t
Heiko> (re-search-forward ,regexp nil t))
Heiko> tags-loop-operate nil)
Heiko> (tags-loop-continue (or file-list-form t))))
Heiko> ;;;###autoload
Heiko> (defun tags-query-replace (from to &optional delimited file-list-form)
Heiko> "Query-replace-regexp FROM with TO through all files listed in tags
table.
Heiko> Third arg DELIMITED (prefix arg) means replace only word-delimited matches.
Heiko> If you exit (\\[keyboard-quit] or ESC), you can resume the query-replace
Heiko> with the command \\[tags-loop-continue].
Heiko> See documentation of variable `tag-table-alist'."
Heiko> (interactive
Heiko> "sTags query replace (regexp): \nsTags query replace %s by: \nP")
Heiko> (setq tags-loop-scan `(with-search-caps-disable-folding ,from t
Heiko> (if (re-search-forward ,from nil t)
Heiko> ;; When we find a match, move back
Heiko> ;; to the beginning of it so perform-replace
Heiko> ;; will see it.
Heiko> (progn (goto-char (match-beginning 0)) t)))
Heiko> tags-loop-operate (list 'perform-replace from to t t
Heiko> (not (null delimited))))
Heiko> (tags-loop-continue (or file-list-form t)))
Heiko>
Heiko> ;; Miscellaneous
Heiko> ;;;###autoload
Heiko> (defun list-tags (file)
Heiko> "Display list of tags in FILE."
Heiko> (interactive (list (read-file-name
Heiko> (if (buffer-file-name)
Heiko> (format "List tags (in file, %s by default): "
Heiko> (file-name-nondirectory (buffer-file-name)))
Heiko> "List tags (in file): ")
Heiko> nil (buffer-file-name) t)))
Heiko> (find-file-noselect file)
Heiko> (with-output-to-temp-buffer "*Tags List*"
Heiko> (princ "Tags in file ")
Heiko> (princ file)
Heiko> (terpri)
Heiko> (save-excursion
Heiko> (dolist (tags-file (with-current-buffer (get-file-buffer file)
Heiko> (buffer-tag-table-list)))
Heiko> ;; We don't want completions getting in the way.
Heiko> (let ((tags-build-completion-table nil))
Heiko> (set-buffer (get-tag-table-buffer tags-file)))
Heiko> (goto-char (point-min))
Heiko> (when
Heiko> (search-forward (concat "\f\n" (file-name-nondirectory file)
",")
Heiko> nil t)
Heiko> (forward-line 1)
Heiko> (while (not (or (eobp) (looking-at "\f")))
Heiko> (princ (buffer-substring (point)
Heiko> (progn (skip-chars-forward "^\C-?")
Heiko> (point))))
Heiko> (terpri)
Heiko> (forward-line 1)))))))
Heiko> ;;;###autoload
Heiko> (defun tags-apropos (string)
Heiko> "Display list of all tags in tag table REGEXP matches."
Heiko> (interactive "sTag apropos (regexp): ")
Heiko> (with-output-to-temp-buffer "*Tags List*"
Heiko> (princ "Tags matching regexp ")
Heiko> (prin1 string)
Heiko> (terpri)
Heiko> (save-excursion
Heiko> (visit-tags-table-buffer)
Heiko> (goto-char 1)
Heiko> (while (re-search-forward string nil t)
Heiko> (beginning-of-line)
Heiko> (princ (buffer-substring (point)
Heiko> (progn (skip-chars-forward "^\C-?")
Heiko> (point))))
Heiko> (terpri)
Heiko> (forward-line 1)))))
Heiko> ;; #### copied from tags.el. This function is *very* big in FSF.
Heiko> (defun visit-tags-table-buffer ()
Heiko> "Select the buffer containing the current tag table."
Heiko> (or tags-file-name
Heiko> (call-interactively 'visit-tags-table))
Heiko> (set-buffer (or (get-file-buffer tags-file-name)
Heiko> (progn
Heiko> (setq tag-table-files nil)
Heiko> (find-file-noselect tags-file-name))))
Heiko> (or (verify-visited-file-modtime (get-file-buffer tags-file-name))
Heiko> (cond ((yes-or-no-p "Tags file has changed, read new contents?
")
Heiko> (revert-buffer t t)
Heiko> (setq tag-table-files nil))))
Heiko> (or (eq (char-after 1) ?\^L)
Heiko> (error "File %s not a valid tag table" tags-file-name)))
Heiko>
Heiko> ;; Sample uses of find-tag-hook and find-tag-default-hook
Heiko> ;; This is wrong. We should either make this behaviour default and
Heiko> ;; back it up, or not use it at all. For now, I've commented it out.
Heiko> ;; --hniksic
Heiko> ;; Example buffer-local tag finding
Heiko> ;(add-hook 'emacs-lisp-mode-hook 'setup-emacs-lisp-default-tag-hook)
Heiko> ;(defun setup-emacs-lisp-default-tag-hook ()
Heiko> ; (cond ((eq major-mode 'emacs-lisp-mode)
Heiko> ; (make-variable-buffer-local 'find-tag-default-hook)
Heiko> ; (setq find-tag-default-hook 'emacs-lisp-default-tag))))
Heiko> ;;; Run it once immediately
Heiko> ;(setup-emacs-lisp-default-tag-hook)
Heiko> ;(when (get-buffer "*scratch*")
Heiko> ; (with-current-buffer "*scratch*"
Heiko> ; (setup-emacs-lisp-default-tag-hook)))
Heiko> ;(defun emacs-lisp-default-tag ()
Heiko> ; "Function to return a default tag for Emacs-Lisp mode."
Heiko> ; (let ((tag (or (variable-at-point)
Heiko> ; (function-at-point))))
Heiko> ; (if tag (symbol-name tag))))
Heiko>
Heiko> ;; Display short info on tag in minibuffer
Heiko> ;; Don't pollute `M-?' -- we may need it for more important stuff.
--hniksic
Heiko> ;(if (null (lookup-key esc-map "?"))
Heiko> ; (define-key esc-map "?" 'display-tag-info))
Heiko> (defun display-tag-info (tagname)
Heiko> "Prints a description of the first tag matching TAGNAME in the echo
area.
Heiko> If this is an elisp function, prints something like \"(defun foo (x y
z)\".
Heiko> That is, is prints the first line of the definition of the form.
Heiko> If this is a C-defined elisp function, it does something more clever."
Heiko> (interactive (if current-prefix-arg
Heiko> '(nil)
Heiko> (list (find-tag-tag "Display tag info: "))))
Heiko> (let* ((results (find-tag-internal tagname))
Heiko> (tag-buf (car results))
Heiko> (tag-point (cdr results))
Heiko> info lname min max fname args)
Heiko> (with-current-buffer tag-buf
Heiko> (save-excursion
Heiko> (save-restriction
Heiko> (widen)
Heiko> (goto-char tag-point)
Heiko> (cond ((let ((case-fold-search nil))
Heiko> (looking-at "^DEFUN[ \t]"))
Heiko> (forward-sexp 1)
Heiko> (down-list 1)
Heiko> (setq lname (read (current-buffer))
Heiko> fname (buffer-substring
Heiko> (progn (forward-sexp 1) (point))
Heiko> (progn (backward-sexp 1) (point)))
Heiko> min (buffer-substring
Heiko> (progn (forward-sexp 3) (point))
Heiko> (progn (backward-sexp 1) (point)))
Heiko> max (buffer-substring
Heiko> (progn (forward-sexp 2) (point))
Heiko> (progn (backward-sexp 1) (point))))
Heiko> (backward-up-list 1)
Heiko> (setq args (buffer-substring
Heiko> (progn (forward-sexp 2) (point))
Heiko> (progn (backward-sexp 1) (point))))
Heiko> (setq info (format "Elisp: %s, C: %s %s, #args: %s"
Heiko> lname
Heiko> fname args
Heiko> (if (string-equal min max)
Heiko> min
Heiko> (format "from %s to %s" min max)))))
Heiko> (t
Heiko> (setq info
Heiko> (buffer-substring
Heiko> (progn (beginning-of-line) (point))
Heiko> (progn (end-of-line) (point)))))))))
Heiko> (message "%s" info))
Heiko> (setq tags-loop-scan '(display-tag-info nil)
Heiko> tags-loop-operate nil)
Heiko> ;; Always return non-nil
Heiko> t)
Heiko>
Heiko> ;; Tag mark stack.
Heiko> (defvar tag-mark-stack1 nil)
Heiko> (defvar tag-mark-stack2 nil)
Heiko> (defcustom tag-mark-stack-max 16
Heiko> "*The maximum number of elements kept on the mark-stack used
Heiko> by tags-search. See also the commands `\\[push-tag-mark]' and
Heiko> and `\\[pop-tag-mark]'."
Heiko> :type 'integer
Heiko> :group 'etags)
Heiko> (defun push-mark-on-stack (stack-symbol &optional max-size)
Heiko> (let ((stack (symbol-value stack-symbol)))
Heiko> (push (point-marker) stack)
Heiko> (cond ((and max-size
Heiko> (> (length stack) max-size))
Heiko> (set-marker (car (nthcdr max-size stack)) nil)
Heiko> (setcdr (nthcdr (1- max-size) stack) nil)))
Heiko> (set stack-symbol stack)))
Heiko> (defun pop-mark-from-stack (stack-symbol1 stack-symbol2 &optional max-size)
Heiko> (let* ((stack (or (symbol-value stack-symbol1)
Heiko> (error "No more tag marks on stack")))
Heiko> (marker (car stack))
Heiko> (m-buf (marker-buffer marker)))
Heiko> (set stack-symbol1 (cdr stack))
Heiko> (or m-buf
Heiko> (error "Marker has no buffer"))
Heiko> (or (buffer-live-p m-buf)
Heiko> (error "Buffer has been killed"))
Heiko> (push-mark-on-stack stack-symbol2 max-size)
Heiko> (switch-to-buffer m-buf)
Heiko> (widen)
Heiko> (goto-char marker)))
Heiko> (defun push-tag-mark ()
Heiko> (push-mark-on-stack 'tag-mark-stack1 tag-mark-stack-max))
Heiko> ;;;###autoload (define-key esc-map "*" 'pop-tag-mark)
Heiko> (defun pop-tag-mark (arg)
Heiko> "Go to last tag position.
Heiko> `find-tag' maintains a mark-stack seperate from the \\[set-mark-command]
mark-stack.
Heiko> This function pops (and moves to) the tag at the top of this stack."
Heiko> (interactive "P")
Heiko> (if (not arg)
Heiko> (pop-mark-from-stack
Heiko> 'tag-mark-stack1 'tag-mark-stack2 tag-mark-stack-max)
Heiko> (pop-mark-from-stack
Heiko> 'tag-mark-stack2 'tag-mark-stack1 tag-mark-stack-max)))
Heiko>
Heiko> (provide 'etags)
Heiko> (provide 'tags)
Hrvoje> I think I prefer it to be consistent. Perhaps there
Hrvoje> should be a switch to turn off the regexp behaviour.
Heiko> I think, that there's already a comment in etags.el, which suggested this.
Hrvoje> -- Hrvoje Niksic <hniksic(a)srce.hr> | Student at FER
Hrvoje> Zagreb, Croatia
Hrvoje> --------------------------------+--------------------------------
Hrvoje> You know it's going to be a bad day when your twin brother
Hrvoje> forgot your birthday.
Heiko> --
Heiko> Heiko Muenkel <muenkel(a)tnt.uni-hannover.de>
Heiko> <A
href="http://www.tnt.uni-hannover.de/wiss/muenkel.html">Münkel</A>
Heiko> PGP-KeyID: 0x4845D4A5
9490
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participants (3)
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Heiko Münkel -
Hrvoje Niksic -
Martin Buchholz