- "Toggle whether to hide unwanted headers and possibly sort them as well.
-If given a negative prefix, always show; if given a positive prefix,
-always hide."
- (interactive (gnus-article-hidden-arg))
- (current-buffer)
- (if (gnus-article-check-hidden-text 'headers arg)
- ;; Show boring headers as well.
- (gnus-article-show-hidden-text 'boring-headers)
- ;; This function might be inhibited.
- (unless gnus-inhibit-hiding
- (save-excursion
- (save-restriction
- (let ((buffer-read-only nil)
- (case-fold-search t)
- (props (nconc (list 'article-type 'headers)
- gnus-hidden-properties))
- (max (1+ (length gnus-sorted-header-list)))
- (ignored (when (not gnus-visible-headers)
- (cond ((stringp gnus-ignored-headers)
- gnus-ignored-headers)
- ((listp gnus-ignored-headers)
- (mapconcat 'identity gnus-ignored-headers
- "\\|")))))
- (visible
- (cond ((stringp gnus-visible-headers)
- gnus-visible-headers)
- ((and gnus-visible-headers
- (listp gnus-visible-headers))
- (mapconcat 'identity gnus-visible-headers "\\|"))))
- (inhibit-point-motion-hooks t)
- beg)
- ;; First we narrow to just the headers.
- (widen)
- (goto-char (point-min))
- ;; Hide any "From " lines at the beginning of (mail) articles.
- (while (looking-at "From ")
- (forward-line 1))
- (unless (bobp)
- (if delete
- (delete-region (point-min) (point))
- (gnus-article-hide-text (point-min) (point) props)))
- ;; Then treat the rest of the header lines.
- (narrow-to-region
- (point)
- (if (search-forward "\n\n" nil t) ; if there's a body
- (progn (forward-line -1) (point))
- (point-max)))
- ;; Then we use the two regular expressions
- ;; `gnus-ignored-headers' and `gnus-visible-headers' to
- ;; select which header lines is to remain visible in the
- ;; article buffer.
- (goto-char (point-min))
- (while (re-search-forward "^[^ \t]*:" nil t)
- (beginning-of-line)
- ;; Mark the rank of the header.
- (put-text-property
- (point) (1+ (point)) 'message-rank
- (if (or (and visible (looking-at visible))
- (and ignored
- (not (looking-at ignored))))
- (gnus-article-header-rank)
- (+ 2 max)))
- (forward-line 1))
- (message-sort-headers-1)
- (when (setq beg (text-property-any
- (point-min) (point-max) 'message-rank (+ 2 max)))
- ;; We make the unwanted headers invisible.
- (if delete
- (delete-region beg (point-max))
- ;; Suggested by Sudish Joseph <joseph@cis.ohio-state.edu>.
- (gnus-article-hide-text-type beg (point-max) 'headers))
- ;; Work around XEmacs lossage.
- (put-text-property (point-min) beg 'invisible nil))))))))
+ "Hide unwanted headers and possibly sort them as well."
+ (interactive)
+ ;; This function might be inhibited.
+ (unless gnus-inhibit-hiding
+ (save-excursion
+ (save-restriction
+ (let ((buffer-read-only nil)
+ (case-fold-search t)
+ (max (1+ (length gnus-sorted-header-list)))
+ (ignored (when (not gnus-visible-headers)
+ (cond ((stringp gnus-ignored-headers)
+ gnus-ignored-headers)
+ ((listp gnus-ignored-headers)
+ (mapconcat 'identity gnus-ignored-headers
+ "\\|")))))
+ (visible
+ (cond ((stringp gnus-visible-headers)
+ gnus-visible-headers)
+ ((and gnus-visible-headers
+ (listp gnus-visible-headers))
+ (mapconcat 'identity gnus-visible-headers "\\|"))))
+ (inhibit-point-motion-hooks t)
+ beg)
+ ;; First we narrow to just the headers.
+ (article-narrow-to-head)
+ ;; Hide any "From " lines at the beginning of (mail) articles.
+ (while (looking-at "From ")
+ (forward-line 1))
+ (unless (bobp)
+ (delete-region (point-min) (point)))
+ ;; Then treat the rest of the header lines.
+ ;; Then we use the two regular expressions
+ ;; `gnus-ignored-headers' and `gnus-visible-headers' to
+ ;; select which header lines is to remain visible in the
+ ;; article buffer.
+ (while (re-search-forward "^[^ \t]*:" nil t)
+ (beginning-of-line)
+ ;; Mark the rank of the header.
+ (put-text-property
+ (point) (1+ (point)) 'message-rank
+ (if (or (and visible (looking-at visible))
+ (and ignored
+ (not (looking-at ignored))))
+ (gnus-article-header-rank)
+ (+ 2 max)))
+ (forward-line 1))
+ (message-sort-headers-1)
+ (when (setq beg (text-property-any
+ (point-min) (point-max) 'message-rank (+ 2 max)))
+ ;; We delete the unwanted headers.
+ (push 'headers gnus-article-wash-types)
+ (add-text-properties (point-min) (+ 5 (point-min))
+ '(article-type headers dummy-invisible t))
+ (delete-region beg (point-max))))))))