+(defcustom gnus-button-valid-fqdn-regexp
+ (concat "[a-z0-9][-.a-z0-9]+\\." ;; [hostname.subdomain.]domain.
+ ;; valid TLDs:
+ "\\([a-z][a-z]" ;; two letter country TDLs
+ "\\|biz\\|com\\|edu\\|gov\\|int\\|mil\\|net\\|org"
+ "\\|aero\\|coop\\|info\\|name\\|museum"
+ "\\|arpa\\|pro\\|uucp\\|bitnet\\|bofh" ;; old style?
+ "\\)")
+ "Regular expression that matches a valid FQDN."
+ :group 'gnus-article-buttons
+ :type 'regexp)
+
+(defcustom gnus-button-man-handler 'manual-entry
+ "Function to use for displaying man pages.
+The function must take at least one argument with a string naming the
+man page."
+ :type '(choice (function-item :tag "Man" manual-entry)
+ (function-item :tag "Woman" woman)
+ (function :tag "Other"))
+ :group 'gnus-article-buttons)
+
+(defcustom gnus-ctan-url "http://tug.ctan.org/tex-archive/"
+ "Top directory of a CTAN \(Comprehensive TeX Archive Network\) archive.
+If the default site is too slow, try to find a CTAN mirror, see
+<URL:http://tug.ctan.org/tex-archive/CTAN.sites?action=/index.html>. See also
+the variable `gnus-button-handle-ctan'."
+ :group 'gnus-article-buttons
+ :link '(custom-manual "(gnus)Group Parameters")
+ :type '(choice (const "http://www.tex.ac.uk/tex-archive/")
+ (const "http://tug.ctan.org/tex-archive/")
+ (const "http://www.dante.de/CTAN/")
+ (string :tag "Other")))
+
+(defcustom gnus-button-ctan-handler 'browse-url
+ "Function to use for displaying CTAN links.
+The function must take one argument, the string naming the URL."
+ :type '(choice (function-item :tag "Browse Url" browse-url)
+ (function :tag "Other"))
+ :group 'gnus-article-buttons)
+
+(defcustom gnus-button-handle-ctan-bogus-regexp "^/?tex-archive/\\|^/"
+ "Bogus strings removed from CTAN URLs."
+ :group 'gnus-article-buttons
+ :type '(choice (const "^/?tex-archive/\\|/")
+ (regexp :tag "Other")))
+
+(defcustom gnus-button-mid-or-mail-regexp
+ (concat "\\b\\(<?[a-z0-9][^<>\")!;:,{}\n\t ]*@"
+ gnus-button-valid-fqdn-regexp
+ ">?\\)\\b")
+ "Regular expression that matches a message ID or a mail address."
+ :group 'gnus-article-buttons
+ :type 'regexp)
+
+(defcustom gnus-button-prefer-mid-or-mail 'guess
+ "What to do when the button on a string as \"foo123@bar.com\" is pushed.
+Strings like this can be either a message ID or a mail address. If the
+variable is set to the symbol `ask', query the user what do do. If it is the
+symbol `guess', Gnus will do a guess and query the user what do do if it is
+ambiguous. See the variable `gnus-button-guessed-mid-regexp' for details
+concerning the guessing. If it is one of the sybols `mid' or `mail', Gnus
+will always assume that the string is a message ID or a mail address,
+respectivly."
+ ;; FIXME: doc-string could/should be improved.
+ :group 'gnus-article-buttons
+ :type '(choice (const ask)
+ (const guess)
+ (const mid)
+ (const mail)))
+
+(defcustom gnus-button-guessed-mid-regexp
+ (concat
+ "^<?\\(slrn\\|Pine\\.\\)"
+ "\\|\\.fsf@\\|\\.fsf_-_@\\|\\.ln@"
+ "\\|@4ax\\.com\\|@ID-[0-9]+\\.[a-zA-Z]+\\.dfncis\\.de"
+ "\\|^<?.*[0-9].*[0-9].*[0-9].*[0-9].*[0-9].*[0-9].*@")
+ "Regular expression that matches message IDs and not mail addresses."
+ ;; TODO: Incorporate more matches from
+ ;; <URL:http://piology.org/perl/id-or-mail.pl.html>. I.e. translate the
+ ;; Perl-REs to Elisp-REs.
+ :group 'gnus-article-buttons
+ :type 'regexp)
+
+(defun gnus-button-handle-mid-or-mail (mid-or-mail)
+ (let* ((pref gnus-button-prefer-mid-or-mail)
+ (url-mid (concat "news" ":" mid-or-mail))
+ (url-mailto (concat "mailto" ":" mid-or-mail)))
+ (gnus-message 9 "mid-or-mail=%s" mid-or-mail)
+ ;; If it looks like a MID (well known readers or servers) use 'mid,
+ ;; otherwise 'ask the user.
+ (if (eq pref 'guess)
+ (if (string-match gnus-button-guessed-mid-regexp mid-or-mail)
+ (setq pref 'mid)
+ (setq pref 'ask)))
+ (if (eq pref 'ask)
+ (save-window-excursion
+ (if (y-or-n-p (concat "Is <" mid-or-mail "> a mail address? "))
+ (setq pref 'mail)
+ (setq pref 'mid))))
+ (cond ((eq pref 'mid)
+ (gnus-message 9 "calling `gnus-button-handle-news' %s" url-mid)
+ (gnus-button-handle-news url-mid))
+ ((eq pref 'mail)
+ (gnus-message 9 "calling `gnus-url-mailto' %s" url-mailto)
+ (gnus-url-mailto url-mailto)))))
+
+(defun gnus-button-handle-custom (url)
+ "Follow a Custom URL."
+ (customize-apropos (gnus-url-unhex-string url)))
+
+(defvar gnus-button-handle-describe-prefix "^\\(C-h\\|<?[Ff]1>?\\)")
+
+(defun gnus-button-handle-describe-function (url)
+ "Call describe-function when pushing the corresponding URL button."
+ (describe-function
+ (intern
+ (gnus-replace-in-string url gnus-button-handle-describe-prefix ""))))
+
+(defun gnus-button-handle-describe-variable (url)
+ "Call describe-variable when pushing the corresponding URL button."
+ (describe-variable
+ (intern
+ (gnus-replace-in-string url gnus-button-handle-describe-prefix ""))))
+
+;; FIXME: Is is possible to implement this? Else it should be removed here
+;; and in `gnus-button-alist'.
+(defun gnus-button-handle-describe-key (url)
+ "Call describe-key when pushing the corresponding URL button."
+ (error "not implemented"))
+
+(defun gnus-button-handle-apropos (url)
+ "Call apropos when pushing the corresponding URL button."
+ (apropos (gnus-replace-in-string url gnus-button-handle-describe-prefix "")))
+
+(defun gnus-button-handle-apropos-command (url)
+ "Call apropos when pushing the corresponding URL button."
+ (apropos-command
+ (gnus-replace-in-string url gnus-button-handle-describe-prefix "")))
+
+(defun gnus-button-handle-apropos-variable (url)
+ "Call apropos when pushing the corresponding URL button."
+ (funcall
+ (if (fboundp 'apropos-variable) 'apropos-variable 'apropos)
+ (gnus-replace-in-string url gnus-button-handle-describe-prefix "")))
+
+(defun gnus-button-handle-apropos-documentation (url)
+ "Call apropos when pushing the corresponding URL button."
+ (funcall
+ (if (fboundp 'apropos-documentation) 'apropos-documentation 'apropos)
+ (gnus-replace-in-string url gnus-button-handle-describe-prefix "")))
+
+(defun gnus-button-handle-ctan (url)
+ "Call `browse-url' when pushing a CTAN URL button."
+ (funcall
+ gnus-button-ctan-handler
+ (concat
+ gnus-ctan-url
+ (gnus-replace-in-string url gnus-button-handle-ctan-bogus-regexp ""))))
+
+(defcustom gnus-button-tex-level 5
+ "*Integer that says how many TeX-related buttons Gnus will show.
+The higher the number, the more buttons will appear and the more false
+positives are possible. Note that you can set this variable local to
+specifific groups. Setting it higher in TeX groups is probably a good idea.
+See Info node `(gnus)Group Parameters' and the variable `gnus-parameters' on
+how to set variables in specific groups."
+ :group 'gnus-article-buttons
+ :link '(custom-manual "(gnus)Group Parameters")
+ :type 'integer)
+
+(defcustom gnus-button-man-level 5
+ "*Integer that says how many man-related buttons Gnus will show.
+The higher the number, the more buttons will appear and the more false
+positives are possible. Note that you can set this variable local to
+specifific groups. Setting it higher in Unix groups is probably a good idea.
+See Info node `(gnus)Group Parameters' and the variable `gnus-parameters' on
+how to set variables in specific groups."
+ :group 'gnus-article-buttons
+ :link '(custom-manual "(gnus)Group Parameters")
+ :type 'integer)
+
+(defcustom gnus-button-emacs-level 5
+ "*Integer that says how many emacs-related buttons Gnus will show.
+The higher the number, the more buttons will appear and the more false
+positives are possible. Note that you can set this variable local to
+specifific groups. Setting it higher in Emacs or Gnus related groups is
+probably a good idea. See Info node `(gnus)Group Parameters' and the variable
+`gnus-parameters' on how to set variables in specific groups."
+ :group 'gnus-article-buttons
+ :link '(custom-manual "(gnus)Group Parameters")
+ :type 'integer)
+
+(defcustom gnus-button-mail-level 5
+ "*Integer that says how many buttons for message IDs or mail addresses will appear.
+The higher the number, the more buttons will appear and the more false
+positives are possible."
+ :group 'gnus-article-buttons
+ :type 'integer)
+
projects / gnus / blobdiff