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|
;;; goto-addr.el --- click to browse URL or to send to e-mail address
;; Copyright (C) 1995, 2000, 2001 Free Software Foundation, Inc.
;; Author: Eric Ding <ericding@alum.mit.edu>
;; Maintainer: FSF
;; Created: 15 Aug 1995
;; Keywords: mh-e, www, mouse, mail
;; This file is part of GNU Emacs.
;; GNU Emacs 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.
;; GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Commentary:
;; This package allows you to click or hit a key sequence while on a
;; URL or e-mail address, and either load the URL into a browser of
;; your choice using the browse-url package, or if it's an e-mail
;; address, to send an e-mail to that address. By default, we bind to
;; the [mouse-2] and the [C-c return] key sequences.
;; INSTALLATION
;;
;; To use goto-address in a particular mode (for example, while
;; reading mail in mh-e), add something like this in your .emacs file:
;;
;; (add-hook 'mh-show-mode-hook 'goto-address)
;;
;; The mouse click method is bound to [mouse-2] on highlighted URLs or
;; e-mail addresses only; it functions normally everywhere else. To bind
;; another mouse click to the function, add the following to your .emacs
;; (for example):
;;
;; (setq goto-address-highlight-keymap
;; (let ((m (make-sparse-keymap)))
;; (define-key m [S-mouse-2] 'goto-address-at-mouse)
;; m))
;;
;; Known bugs/features:
;; * goto-address-mail-regexp only catches foo@bar.org style addressing,
;; not stuff like X.400 addresses, etc.
;; * regexp also catches Message-Id line, since it is in the format of
;; an Internet e-mail address (like Compuserve addresses)
;; * If the buffer is fontified after goto-address-fontify is run
;; (say, using font-lock-fontify-buffer), then font-lock faces will
;; override goto-address faces.
;;; Code:
(require 'thingatpt)
(autoload 'browse-url-url-at-point "browse-url")
;; XEmacs needs the following definitions.
(unless (fboundp 'overlays-in)
(require 'overlay))
(unless (fboundp 'line-beginning-position)
(defalias 'line-beginning-position 'point-at-bol))
(unless (fboundp 'line-end-position)
(defalias 'line-end-position 'point-at-eol))
(unless (fboundp 'match-string-no-properties)
(defalias 'match-string-no-properties 'match-string))
(defgroup goto-address nil
"Click to browse URL or to send to e-mail address."
:group 'mouse
:group 'hypermedia)
;; I don't expect users to want fontify'ing without highlighting.
(defcustom goto-address-fontify-p t
"*Non-nil means URLs and e-mail addresses in buffer are fontified.
But only if `goto-address-highlight-p' is also non-nil."
:type 'boolean
:group 'goto-address)
(defcustom goto-address-highlight-p t
"*Non-nil means URLs and e-mail addresses in buffer are highlighted."
:type 'boolean
:group 'goto-address)
(defcustom goto-address-fontify-maximum-size 30000
"*Maximum size of file in which to fontify and/or highlight URLs.
A value of t means there is no limit--fontify regardless of the size."
:type '(choice (integer :tag "Maximum size") (const :tag "No limit" t))
:group 'goto-address)
(defvar goto-address-mail-regexp
;; Actually pretty much any char could appear in the username part. -stef
"[-a-zA-Z0-9._+]+@\\([-a-zA-z0-9_]+\\.\\)+[a-zA-Z0-9]+"
"A regular expression probably matching an e-mail address.")
(defvar goto-address-url-regexp
(concat "\\<\\("
(mapconcat 'identity
(delete "mailto:" (copy-sequence thing-at-point-uri-schemes))
"\\|")
"\\)"
thing-at-point-url-path-regexp)
;; (concat "\\b\\(s?https?\\|ftp\\|file\\|gopher\\|news\\|"
;; "telnet\\|wais\\):\\(//[-a-zA-Z0-9_.]+:"
;; "[0-9]*\\)?[-a-zA-Z0-9_=?#$@~`%&*+|\\/.,]*"
;; "[-a-zA-Z0-9_=#$@~`%&*+|\\/]")
"A regular expression probably matching a URL.")
(defvar goto-address-highlight-keymap
(let ((m (make-sparse-keymap)))
(if (featurep 'xemacs)
(define-key m (kbd "<button2>") 'goto-address-at-mouse)
(define-key m (kbd "<mouse-2>") 'goto-address-at-mouse))
(define-key m (kbd "C-c RET") 'goto-address-at-point)
m)
"keymap to hold goto-addr's mouse key defs under highlighted URLs.")
(defcustom goto-address-url-face 'bold
"Face to use for URLs."
:type 'face
:group 'goto-address)
(defcustom goto-address-url-mouse-face 'highlight
"Face to use for URLs when the mouse is on them."
:type 'face
:group 'goto-address)
(defcustom goto-address-mail-face 'italic
"Face to use for e-mail addresses."
:type 'face
:group 'goto-address)
(defcustom goto-address-mail-mouse-face 'secondary-selection
"Face to use for e-mail addresses when the mouse is on them."
:type 'face
:group 'goto-address)
(defun goto-address-fontify ()
"Fontify the URLs and e-mail addresses in the current buffer.
This function implements `goto-address-highlight-p'
and `goto-address-fontify-p'."
;; Clean up from any previous go.
(dolist (overlay (overlays-in (point-min) (point-max)))
(if (overlay-get overlay 'goto-address)
(delete-overlay overlay)))
(save-excursion
(let ((inhibit-point-motion-hooks t))
(goto-char (point-min))
(if (or (eq t goto-address-fontify-maximum-size)
(< (- (point-max) (point)) goto-address-fontify-maximum-size))
(progn
(while (re-search-forward goto-address-url-regexp nil t)
(let* ((s (match-beginning 0))
(e (match-end 0))
(this-overlay (make-overlay s e)))
(and goto-address-fontify-p
(overlay-put this-overlay 'face goto-address-url-face))
(overlay-put this-overlay
'mouse-face goto-address-url-mouse-face)
(overlay-put this-overlay
'help-echo "mouse-2: follow URL")
(overlay-put this-overlay
'keymap goto-address-highlight-keymap)
(overlay-put this-overlay 'goto-address t)))
(goto-char (point-min))
(while (re-search-forward goto-address-mail-regexp nil t)
(let* ((s (match-beginning 0))
(e (match-end 0))
(this-overlay (make-overlay s e)))
(and goto-address-fontify-p
(overlay-put this-overlay 'face goto-address-mail-face))
(overlay-put this-overlay 'mouse-face
goto-address-mail-mouse-face)
(overlay-put this-overlay
'help-echo "mouse-2: mail this address")
(overlay-put this-overlay
'keymap goto-address-highlight-keymap)
(overlay-put this-overlay 'goto-address t))))))))
;; code to find and goto addresses; much of this has been blatantly
;; snarfed from browse-url.el
;;;###autoload
(defun goto-address-at-mouse (event)
"Send to the e-mail address or load the URL clicked with the mouse.
Send mail to address at position of mouse click. See documentation for
`goto-address-find-address-at-point'. If no address is found
there, then load the URL at or before the position of the mouse click."
(interactive "e")
(save-excursion
(mouse-set-point event)
(goto-address-at-point)))
;;;###autoload
(defun goto-address-at-point ()
"Send to the e-mail address or load the URL at point.
Send mail to address at point. See documentation for
`goto-address-find-address-at-point'. If no address is found
there, then load the URL at or before point."
(interactive)
(save-excursion
(let ((address (save-excursion (goto-address-find-address-at-point))))
(if (and address
(save-excursion
(goto-char (previous-single-char-property-change
(point) 'goto-address nil
(line-beginning-position)))
(not (looking-at goto-address-url-regexp))))
(compose-mail address)
(let ((url (browse-url-url-at-point)))
(if url
(browse-url url)
(error "No e-mail address or URL found")))))))
(defun goto-address-find-address-at-point ()
"Find e-mail address around or before point.
Then search backwards to beginning of line for the start of an e-mail
address. If no e-mail address found, return nil."
(re-search-backward "[^-_A-z0-9.@]" (line-beginning-position) 'lim)
(if (or (looking-at goto-address-mail-regexp) ; already at start
(and (re-search-forward goto-address-mail-regexp
(line-end-position) 'lim)
(goto-char (match-beginning 0))))
(match-string-no-properties 0)))
;;;###autoload
(defun goto-address ()
"Sets up goto-address functionality in the current buffer.
Allows user to use mouse/keyboard command to click to go to a URL
or to send e-mail.
By default, goto-address binds to mouse-2 and C-c RET.
Also fontifies the buffer appropriately (see `goto-address-fontify-p' and
`goto-address-highlight-p' for more information)."
(interactive)
(if goto-address-highlight-p
(goto-address-fontify)))
(provide 'goto-addr)
;;; goto-addr.el ends here
|
