gnus-button-alist

gnus-button-alist is a variable defined in `gnus-art.el'.
Its value is shown below.

• This variable may be risky if used as a file-local variable.

Documentation:
*Alist of regexps matching buttons in article bodies.

Each entry has the form (REGEXP BUTTON FORM CALLBACK PAR...), where
REGEXP: is the string (case insensitive) matching text around the button (can
also be Lisp expression evaluating to a string),
BUTTON: is the number of the regexp grouping actually matching the button,
FORM: is a Lisp expression which must eval to true for the button to
be added,
CALLBACK: is the function to call when the user push this button, and each
PAR: is a number of a regexp grouping whose text will be passed to CALLBACK.

CALLBACK can also be a variable, in that case the value of that
variable it the real callback function.

You can customize this variable.

Value:

(("<\\(url:[>\n	 ]*?\\)?\\(nntp\\|news\\):[>\n	 ]*\\([^>\n	 ]*@[^>\n	 ]*\\)>" 0
  (>= gnus-button-message-level 0)
  gnus-button-handle-news 3)
 ((concat "\\b\\(nntp\\|news\\):\\(" gnus-button-valid-localpart-regexp "@[a-z0-9.-]+[a-z]\\)")
  0 t gnus-button-handle-news 2)
 ("\\(\\b<\\(url:[>\n	 ]*\\)?\\(nntp\\|news\\):[>\n	 ]*\\(//\\)?\\([^>\n	 ]*\\)>\\)" 1
  (>= gnus-button-message-level 0)
  gnus-button-fetch-group 5)
 ("\\b\\(nntp\\|news\\):\\(//\\)?\\([^'\">\n	 ]+\\)" 0
  (>= gnus-button-message-level 0)
  gnus-button-fetch-group 3)
 ("\\bmid:\\(//\\)?\\([^'\">\n	 ]+@[^'\">\n	 /]+\\)" 0
  (>= gnus-button-message-level 0)
  gnus-button-message-id 2)
 ("\\bin\\( +article\\| +message\\)? +\\(<\\([^\n @<>]+@[^\n @<>]+\\)>\\)" 2
  (>= gnus-button-message-level 0)
  gnus-button-message-id 3)
 ("\\b\\(mid\\|message-id\\):? +\\(<\\([^\n @<>]+@[^\n @<>]+\\)>\\)" 2
  (>= gnus-button-message-level 0)
  gnus-button-message-id 3)
 ("\\( \n	]+\\)>" 0
  (>= gnus-button-message-level 0)
  gnus-url-mailto 2)
 ("\\bmailto:\\([-a-z.@_+0-9%=?&/]+\\)" 0
  (>= gnus-button-message-level 0)
  gnus-url-mailto 1)
 ("\\bmailto:\\([^ \n	]+\\)" 0
  (>= gnus-button-message-level 0)
  gnus-url-mailto 1)
 ("\\binfo://?\\([^'\">\n	]+\\)" 0
  (>= gnus-button-emacs-level 1)
  gnus-button-handle-info-url 1)
 ("\\binfo://\\([^'\">\n	 ]+\\)" 0
  (>= gnus-button-emacs-level 1)
  gnus-button-handle-info-url 1)
 ("\\binfo:\\([^('\n	
 \"><][^'\n	
 \"><]*\\)" 0
  (>= gnus-button-emacs-level 1)
  gnus-button-handle-info-url-gnome 1)
 ("<\\(info:\\(([^)]+)[^>\n
]*\\)\\)>" 1
  (>= gnus-button-emacs-level 1)
  gnus-button-handle-info-url-kde 2)
 ("\\((Info-goto-node\\|(info\\)[ 	\n]*\\(\"[^\"]*\"\\))" 0
  (>= gnus-button-emacs-level 1)
  gnus-button-handle-info-url 2)
 ("\\b\\(C-h\\|?\\)[ 	\n]+i[ 	\n]+d?[ 	\n]?m[ 	\n]+[^ ]+ ?[^ ]+[ 	\n]+RET\\([ 	\n]+i[ 	\n]+[^ ]+ ?[^ ]+[ 	\n]+RET\\([ 	\n,]*\\)\\)?" 0
  (>= gnus-button-emacs-level 1)
  gnus-button-handle-info-keystrokes 0)
 ("M-x[ 	\n]\\(customize-[^ ]+\\)[ 	\n]RET[ 	\n]\\([^ ]+\\)[ 	\n]RET\\>" 0
  (>= gnus-button-emacs-level 1)
  gnus-button-handle-custom 1 2)
 ("M-x[ 	\n]+apropos[ 	\n]+RET[ 	\n]+\\([^ 	\n]+\\)[ 	\n]+RET\\>" 0
  (>= gnus-button-emacs-level 1)
  gnus-button-handle-apropos 1)
 ("M-x[ 	\n]+apropos-command[ 	\n]+RET[ 	\n]+\\([^ 	\n]+\\)[ 	\n]+RET\\>" 0
  (>= gnus-button-emacs-level 1)
  gnus-button-handle-apropos-command 1)
 ("M-x[ 	\n]+apropos-variable[ 	\n]+RET[ 	\n]+\\([^ 	\n]+\\)[ 	\n]+RET\\>" 0
  (>= gnus-button-emacs-level 1)
  gnus-button-handle-apropos-variable 1)
 ("M-x[ 	\n]+apropos-documentation[ 	\n]+RET[ 	\n]+\\([^ 	\n]+\\)[ 	\n]+RET\\>" 0
  (>= gnus-button-emacs-level 1)
  gnus-button-handle-apropos-documentation 1)
 ("/\\([a-z][-a-z0-9]+\\.el\\)\\>[^.?]" 1
  (>= gnus-button-emacs-level 8)
  gnus-button-handle-library 1)
 ("`\\([a-z][-a-z0-9]+\\.el\\)'" 1
  (>= gnus-button-emacs-level 8)
  gnus-button-handle-library 1)
 ("`\\([a-z][a-z0-9]+-[a-z0-9]+-[-a-z0-9]*[a-z]\\|\\(gnus\\|message\\)-[-a-z]+\\)'" 0
  (>= gnus-button-emacs-level 8)
  gnus-button-handle-symbol 1)
 ("`\\([a-z][a-z0-9]+-[a-z]+\\)'" 0
  (>= gnus-button-emacs-level 9)
  gnus-button-handle-symbol 1)
 ("(setq[ 	\n]+\\([a-z][a-z0-9]+-[-a-z0-9]+\\)[ 	\n]+.+)" 1
  (>= gnus-button-emacs-level 7)
  gnus-button-handle-describe-variable 1)
 ("\\bM-x[ 	\n]+\\([^ 	\n]+\\)[ 	\n]+RET\\>" 1
  (>= gnus-button-emacs-level 7)
  gnus-button-handle-describe-function 1)
 ("\\b\\(C-h\\|?\\)[ 	\n]+f[ 	\n]+\\([^ 	\n]+\\)[ 	\n]+RET\\>" 0
  (>= gnus-button-emacs-level 1)
  gnus-button-handle-describe-function 2)
 ("\\b\\(C-h\\|?\\)[ 	\n]+v[ 	\n]+\\([^ 	\n]+\\)[ 	\n]+RET\\>" 0
  (>= gnus-button-emacs-level 1)
  gnus-button-handle-describe-variable 2)
 ("`\\(\\(C-h\\|?\\)[ 	\n]+k[ 	\n]+\\([^']+\\)\\)'" 1
  (>= gnus-button-emacs-level 1)
  gnus-button-handle-describe-key 3)
 ("]*\\)>" 1
  (>= gnus-button-browse-level 0)
  gnus-button-embedded-url 1)
 ("\"URL: *\\([^\n\"]*\\)\"" 1
  (>= gnus-button-browse-level 0)
  gnus-button-embedded-url 1)
 (gnus-button-url-regexp 0
			 (>= gnus-button-browse-level 0)
			 browse-url 0)
 ("\\b\\([a-z][a-z]+([1-9])\\)\\W" 0
  (and
   (>= gnus-button-man-level 1)
   (< gnus-button-man-level 3))
  gnus-button-handle-man 1)
 ("\\b\\([a-z][-_.a-z0-9]+([1-9])\\)\\W" 0
  (and
   (>= gnus-button-man-level 3)
   (< gnus-button-man-level 5))
  gnus-button-handle-man 1)
 ("\\b\\(\\(?:[a-z][-+_.:a-z0-9]+([1-9][X1a-z]*)\\)\\|\\b\\(?:X([1-9])\\)\\)\\W" 0
  (>= gnus-button-man-level 5)
  gnus-button-handle-man 1)
 ("^--- \\([^ .]+\\.el\\).*\n.*\n@@ -?\\([0-9]+\\)" 1
  (>= gnus-button-message-level 4)
  gnus-button-patch 1 2)
 ("^\\*\\*\\* \\([^ .]+\\.el\\).*\n.*\n\\*+\n\\*\\*\\* \\([0-9]+\\)" 1
  (>= gnus-button-message-level 4)
  gnus-button-patch 1 2)
 (gnus-button-mid-or-mail-regexp 0
				 (>= gnus-button-message-level 5)
				 gnus-button-handle-mid-or-mail 1))