(defvar goto-tag-location-function nil
"Function of to go to the location in the buffer specified by a tag.
One argument, the tag info returned by `snarf-tag-function'.")
-(defvar find-tag-file-order nil
- "Function which checks for complete and correct match, for file name as tag.")
(defvar find-tag-regexp-search-function nil
"Search function passed to `find-tag-in-order' for finding a regexp tag.")
(defvar find-tag-regexp-tag-order nil
(while tables
(setq computed (cons (car tables) computed)
table-buffer (get-file-buffer (car tables)))
- (if (and table-buffer
+ (if (and table-buffer
;; There is a buffer visiting the file. Now make sure
;; it is initialized as a tag table buffer.
(save-excursion
;; Select the tags table buffer and get the file list up to date.
(let ((tags-file-name (car tables)))
(visit-tags-table-buffer 'same)
- (if (member this-file (tags-table-files))
+ (if (member this-file (mapcar 'expand-file-name
+ (tags-table-files)))
;; Found it.
(setq found tables))))
(setq tables (cdr tables)))
(setq elt (cdr elt))))
;; The last element we found in the computed list before FOUND
;; that appears in the user's list will be the table that
- ;; included the one we found.
+ ;; included the one we found.
could-be))))
;; Subroutine of visit-tags-table-buffer. Move tags-table-list-pointer
;; be frobnicated, and CONT will be set non-nil so we don't
;; do it below.
(and buffer-file-name
- (or
+ (or
;; First check only tables already in buffers.
(tags-table-including buffer-file-name t)
;; Since that didn't find any, now do the
;;;###autoload
(defun tags-table-files ()
"Return a list of files in the current tags table.
-Assumes the tags table is the current buffer.
-File names returned are absolute."
+Assumes the tags table is the current buffer. The file names are returned
+as they appeared in the `etags' command that created the table, usually
+without directory names."
(or tags-table-files
(setq tags-table-files
(funcall tags-table-files-function))))
(setq find-tag-history (cons tagname find-tag-history))
;; Save the current buffer's value of `find-tag-hook' before selecting the
;; tags table buffer.
- (let ((local-find-tag-hook find-tag-hook)
- (search-tag))
+ (let ((local-find-tag-hook find-tag-hook))
(if (eq '- next-p)
;; Pop back to a previous location.
(if (null tags-location-stack)
;; Record the location so we can pop back to it later.
(let ((marker (make-marker)))
(save-excursion
- (setq search-tag (if next-p last-tag tagname))
(set-buffer
;; find-tag-in-order does the real work.
(find-tag-in-order
find-tag-search-function)
(if regexp-p
find-tag-regexp-tag-order
- (if (string-match "\\b.*\\.\\w*" search-tag)
- find-tag-file-order
- find-tag-tag-order))
+ find-tag-tag-order)
(if regexp-p
find-tag-regexp-next-line-after-failure-p
find-tag-next-line-after-failure-p)
first-search)
(let (file ;name of file containing tag
tag-info ;where to find the tag in FILE
- tags-table-file ;name of tags file
(first-table t)
(tag-order order)
goto-func
- match-type
)
(save-excursion
(or first-search ;find-tag-noselect has already done it.
(visit-tags-table-buffer 'same))
;; Get a qualified match.
- (setq match-type
- (catch 'qualified-match-found
+ (catch 'qualified-match-found
;; Iterate over the list of tags tables.
(while (or first-table
(and first-search first-table
;; Start at beginning of tags file.
(goto-char (point-min)))
- (or first-table
- (goto-char (point-min)))
(setq first-table nil)
- (setq tags-table-file buffer-file-name)
;; Iterate over the list of ordering predicates.
(while order
(while (funcall search-forward-func pattern nil t)
(setq order tag-order))
;; We throw out on match, so only get here if there were no matches.
(error "No %stags %s %s" (if first-search "" "more ")
- matching pattern)))
-
+ matching pattern))
+
;; Found a tag; extract location info.
(beginning-of-line)
(setq tag-lines-already-matched (cons (point)
(set-buffer (find-file-noselect file))
(widen)
(push-mark)
- (if (eq match-type 'tag-filename-match-p)
- (goto-char (point-min))
- (funcall goto-func tag-info))
-
+ (funcall goto-func tag-info)
+
;; Return the buffer where the tag was found.
(current-buffer))))
\f
(find-tag-regexp-tag-order . (tag-re-match-p))
(find-tag-regexp-next-line-after-failure-p . t)
(find-tag-search-function . search-forward)
- (find-tag-tag-order . (tag-filename-match-p
+ (find-tag-tag-order . (tag-exact-file-name-match-p
tag-exact-match-p
tag-symbol-match-p
tag-word-match-p
tag-any-match-p))
- (find-tag-file-order . (tag-filename-match-p))
(find-tag-next-line-after-failure-p . nil)
(list-tags-function . etags-list-tags)
(tags-apropos-function . etags-tags-apropos)
(defun etags-snarf-tag ()
(let (tag-text line startpos)
- (search-forward "\177")
- (setq tag-text (buffer-substring (1- (point))
- (save-excursion (beginning-of-line)
- (point))))
- ;; Skip explicit tag name if present.
- (search-forward "\001" (save-excursion (forward-line 1) (point)) t)
- (if (looking-at "[0-9]")
- (setq line (string-to-int (buffer-substring
- (point)
- (progn (skip-chars-forward "0-9")
- (point))))))
- (search-forward ",")
- (if (looking-at "[0-9]")
- (setq startpos (string-to-int (buffer-substring
- (point)
- (progn (skip-chars-forward "0-9")
- (point))))))
+ (if (save-excursion
+ (forward-line -1)
+ (looking-at "\f\n"))
+ ;; The match was for a source file name, not any tag within a file.
+ ;; Give text of t, meaning to go exactly to the location we specify,
+ ;; the beginning of the file.
+ (setq tag-text t
+ line nil
+ startpos 1)
+
+ ;; Find the end of the tag and record the whole tag text.
+ (search-forward "\177")
+ (setq tag-text (buffer-substring (1- (point))
+ (save-excursion (beginning-of-line)
+ (point))))
+ ;; Skip explicit tag name if present.
+ (search-forward "\001" (save-excursion (forward-line 1) (point)) t)
+ (if (looking-at "[0-9]")
+ (setq line (string-to-int (buffer-substring
+ (point)
+ (progn (skip-chars-forward "0-9")
+ (point))))))
+ (search-forward ",")
+ (if (looking-at "[0-9]")
+ (setq startpos (string-to-int (buffer-substring
+ (point)
+ (progn (skip-chars-forward "0-9")
+ (point)))))))
;; Leave point on the next line of the tags file.
(forward-line 1)
(cons tag-text (cons line startpos))))
;; TAG-INFO is a cons (TEXT LINE . POSITION) where TEXT is the initial part
;; of a line containing the tag and POSITION is the character position of
-;; TEXT within the file (starting from 1); LINE is the line number. Either
+;; TEXT within the file (starting from 1); LINE is the line number. If
+;; TEXT is t, it means the tag refers to exactly LINE or POSITION
+;; (whichever is present, LINE having preference, no searching. Either
;; LINE or POSITION may be nil; POSITION is used if present. If the tag
;; isn't exactly at the given position then look around that position using
;; a search window which expands until it hits the start of file.
(defun etags-goto-tag-location (tag-info)
(let ((startpos (cdr (cdr tag-info)))
- ;; This constant is 1/2 the initial search window.
- ;; There is no sense in making it too small,
- ;; since just going around the loop once probably
- ;; costs about as much as searching 2000 chars.
- (offset 1000)
- (found nil)
- (pat (concat (if (eq selective-display t)
- "\\(^\\|\^m\\)" "^")
- (regexp-quote (car tag-info)))))
- ;; The character position in the tags table is 0-origin.
- ;; Convert it to a 1-origin Emacs character position.
- (if startpos (setq startpos (1+ startpos)))
- ;; If no char pos was given, try the given line number.
- (or startpos
- (if (car (cdr tag-info))
- (setq startpos (progn (goto-line (car (cdr tag-info)))
- (point)))))
- (or startpos
- (setq startpos (point-min)))
- ;; First see if the tag is right at the specified location.
- (goto-char startpos)
- (setq found (looking-at pat))
- (while (and (not found)
- (progn
- (goto-char (- startpos offset))
- (not (bobp))))
- (setq found
- (re-search-forward pat (+ startpos offset) t)
- offset (* 3 offset))) ; expand search window
- (or found
- (re-search-forward pat nil t)
- (error "Rerun etags: `%s' not found in %s"
- pat buffer-file-name)))
- ;; Position point at the right place
- ;; if the search string matched an extra Ctrl-m at the beginning.
- (and (eq selective-display t)
- (looking-at "\^m")
- (forward-char 1))
- (beginning-of-line))
+ offset found pat)
+ (if (eq (car tag-info) t)
+ ;; Direct file tag.
+ (cond (line (goto-line line))
+ (position (goto-char position))
+ (t (error "etags.el BUG: bogus direct file tag")))
+ ;; This constant is 1/2 the initial search window.
+ ;; There is no sense in making it too small,
+ ;; since just going around the loop once probably
+ ;; costs about as much as searching 2000 chars.
+ (setq offset 1000
+ found nil
+ pat (concat (if (eq selective-display t)
+ "\\(^\\|\^m\\)" "^")
+ (regexp-quote (car tag-info))))
+ ;; The character position in the tags table is 0-origin.
+ ;; Convert it to a 1-origin Emacs character position.
+ (if startpos (setq startpos (1+ startpos)))
+ ;; If no char pos was given, try the given line number.
+ (or startpos
+ (if (car (cdr tag-info))
+ (setq startpos (progn (goto-line (car (cdr tag-info)))
+ (point)))))
+ (or startpos
+ (setq startpos (point-min)))
+ ;; First see if the tag is right at the specified location.
+ (goto-char startpos)
+ (setq found (looking-at pat))
+ (while (and (not found)
+ (progn
+ (goto-char (- startpos offset))
+ (not (bobp))))
+ (setq found
+ (re-search-forward pat (+ startpos offset) t)
+ offset (* 3 offset))) ; expand search window
+ (or found
+ (re-search-forward pat nil t)
+ (error "Rerun etags: `%s' not found in %s"
+ pat buffer-file-name)))
+ ;; Position point at the right place
+ ;; if the search string matched an extra Ctrl-m at the beginning.
+ (and (eq selective-display t)
+ (looking-at "\^m")
+ (forward-char 1))
+ (beginning-of-line)))
(defun etags-list-tags (file)
(goto-char 1)
(end-of-line)
(skip-chars-backward "^," beg)
(or (looking-at "include$")
- ;; Expand in the default-directory of the tags table buffer.
- (setq files (cons (expand-file-name (buffer-substring beg (1- (point))))
- files))))
+ (setq files (cons (buffer-substring beg (1- (point))) files))))
(nreverse files)))
(defun etags-tags-included-tables ()
(save-excursion (backward-char (1+ (length tag)))
(looking-at "\\b"))))
-(defun tag-filename-match-p (tag)
+(defun tag-exact-file-name-match-p (tag)
(and (looking-at ",")
(save-excursion (backward-char (1+ (length tag)))
- (looking-at "\\b"))))
+ (looking-at "\f\n"))))
;; t if point is in a tag line with a tag containing TAG as a substring.
(defun tag-any-match-p (tag)
(save-excursion
;; Visit the tags table buffer to get its list of files.
(visit-tags-table-buffer)
- ;; Copy the list so we can setcdr below.
- (setq next-file-list (copy-sequence (tags-table-files)))
+ ;; Copy the list so we can setcdr below, and expand the file
+ ;; names while we are at it, in this buffer's default directory.
+ (setq next-file-list (mapcar 'expand-file-name (tags-table-files)))
;; Iterate over all the tags table files, collecting
;; a complete list of referenced file names.
(while (visit-tags-table-buffer t)
;; Use a copy so the next loop iteration will not modify the
;; list later returned by (tags-table-files).
(if tail
- (setcdr tail (copy-sequence (tags-table-files)))
- (setq next-file-list (copy-sequence (tags-table-files))))))))
+ (setcdr tail (mapcar 'expand-file-name (tags-table-files)))
+ (setq next-file-list (mapcar 'expand-file-name
+ (tags-table-files))))))))
(t
;; Initialize the list by evalling the argument.
(setq next-file-list (eval initialize))))
t t (list 'quote delimited)))
(tags-loop-continue (or file-list-form t)))
\f
+(defun tags-complete-tags-table-file (string predicate what)
+ (save-excursion
+ ;; If we need to ask for the tag table, allow that.
+ (let ((enable-recursive-minibuffers t))
+ (visit-tags-table-buffer))
+ (if (eq what t)
+ (all-completions string (mapcar 'list (tags-table-files))
+ predicate)
+ (try-completion string (mapcar 'list (tags-table-files))
+ predicate))))
+
;;;###autoload
-(defun list-tags (filename &optional next-match)
- "Gives the list of functions available in file \"filename\"
-Searches only in \"tags-file-name\"."
- (interactive "sFunctions in File: ")
- (let (file-list)
- (setq file-list (tags-locate-file-in-tags-table filename
- (if next-match next-match nil)))
- (if file-list
- (tags-list-functions-in-file (nth 1 (car file-list))
- (nth 2 (car file-list)))
- (message (format "%s not found in tags table" filename)))))
+(defun list-tags (file &optional next-match)
+ "Display list of tags in file FILE.
+This searches only the first table in the list, and no included tables.
+FILE should be as it appeared in the `etags' command, usually without a
+directory specification."
+ (interactive (list (completing-read "List tags in file: "
+ 'tags-complete-tags-table-file
+ nil t nil)))
+ (with-output-to-temp-buffer "*Tags List*"
+ (princ "Tags in file ")
+ (princ file)
+ (terpri)
+ (save-excursion
+ (let ((first-time t)
+ (gotany nil))
+ (while (visit-tags-table-buffer (not first-time))
+ (setq first-time nil)
+ (if (funcall list-tags-function file)
+ (setq gotany t)))
+ (or gotany
+ (error "File %s not in current tags tables" file))))))
;;;###autoload
(defun tags-apropos (regexp)
(use-local-map select-tags-table-mode-map)
(setq selective-display t
selective-display-ellipses nil))
-
+
(defun select-tags-table-select ()
"Select the tags table named on this line."
(interactive)
(interactive)
(kill-buffer (current-buffer))
(or (one-window-p)
- (delete-window)))
+ (delete-window)))
\f
;;;###autoload
(defun complete-tag ()
"Perform tags completion on the text around point.
-Completes to the set of names listed in the current tags table.
+Completes to the set of names listed in the current tags table.
The string to complete is chosen in the same way as the default
for \\[find-tag] (which see)."
(interactive)
;;;###autoload (define-key esc-map "\t" 'complete-tag)
\f
-(defun tags-list-functions-in-file (pos tag-file)
- "Lists the functions for the given file. Backend for `list-tags'."
- (let ((tag-buf (find-file-noselect tag-file))
- (result-buf (get-buffer-create "*Tags Function List*"))
- function
- beg
- map)
- (save-excursion
- (set-buffer result-buf)
- (erase-buffer)
- (set-buffer tag-buf)
- (goto-char pos)
- (forward-line 1)
- (beginning-of-line)
- ; C-l marks end of information of a file in TAGS.
- (while (and (not (looking-at "^\C-l")) (not (eobp)))
- ; skip mere #defines, typedefs and struct definitions
- (if (not (or (looking-at "^#define\\s-+[a-zA-Z0-9_]+\\s-+")
- (looking-at "^typedef\\s-+")
- (looking-at "^\\s-*}")))
- (progn
- (setq beg (point))
- (skip-chars-forward "^\C-?(")
- (setq function (buffer-substring beg (point)))
- (save-excursion
- (set-buffer result-buf)
- (insert (concat function "\n")))))
- (forward-line 1)
- (beginning-of-line)))
- (switch-to-buffer "*Tags Function List*")
- (goto-char 1)
- (set-buffer-modified-p nil)
- (setq buffer-read-only t)))
-
-(defun tags-locate-file-in-tags-table (filename first-search)
- "This function is used to locate `filename' in `tags-table-list'.
- Its internally used by the functions `find-file-from-tags' and
- `tags-list-tags-in-file'. If `first-search' is t, search continues from where
- it left off last time. Else, its a fresh search."
- (let (tag-list current-tags-buffer beg file found-file-list next-tag-file)
- (setq tag-list tags-table-list)
- (catch 'found-file
- (setq found-file-list nil
- next-tag-file nil)
- (while tag-list
- (setq current-tags-buffer (find-file-noselect (car tag-list)))
- (save-excursion
- (set-buffer current-tags-buffer)
- (if (or next-tag-file
- (not first-search))
- (goto-char (point-min)))
- (if (search-forward filename nil t)
- (if (tag-filename-match-p filename)
- (progn
- (beginning-of-line)
- (setq beg (point))
- (skip-chars-forward "^,")
- (or (looking-at ",include$")
- (setq file (expand-file-name (buffer-substring beg
- (point)))))
- (if (string-match filename (file-name-nondirectory file))
- (progn
- (setq found-file-list (cons (list file (point)
- (buffer-file-name))
- found-file-list))
- (throw 'found-file found-file-list))))))
- (setq tag-list (cdr tag-list))
- (setq next-tag-file 't)))
- (throw 'found-file found-file-list))))
-
(provide 'etags)
;;; etags.el ends here
projects / emacs.git / commitdiff