[PATCH 2/2] browse-url.el: elinks support

[Johannes Weiner]

Hi,

this patch adds `browse-url-elinks'.

        Hannes

diff -Naur emacs.orig/lisp/net/browse-url.el emacs/lisp/net/browse-url.el
--- emacs.orig/lisp/net/browse-url.el   2007-08-22 02:40:40.000000000 +0200
+++ emacs/lisp/net/browse-url.el        2007-08-22 02:57:32.000000000 +0200
@@ -55,6 +55,7 @@
 ;; browse-url-default-macosx-browser  Mac OS X browser
 ;; browse-url-gnome-moz               GNOME interface to Mozilla
 ;; browse-url-kde                     KDE konqueror (kfm)
+;; browse-url-elinks                  Elinks      Don't know (tried with 
0.12.GIT)
 
 ;; [A version of the Netscape browser is now free software
 ;; <URL:http://www.mozilla.org/>, albeit not GPLed, so it is
@@ -263,6 +264,7 @@
          (function-item :tag "Grail" :value  browse-url-grail)
          (function-item :tag "MMM" :value  browse-url-mmm)
          (function-item :tag "KDE" :value browse-url-kde)
+         (function-item :tag "Elinks" :value browse-url-elinks)
          (function-item :tag "Specified by `Browse Url Generic Program'"
                         :value browse-url-generic)
          (function-item :tag "Default Windows browser"
@@ -611,6 +613,11 @@
   :type '(repeat (string :tag "Argument"))
   :group 'browse-url)
 
+(defcustom browse-url-elinks-wrapper '("xterm" "-e")
+  "*Wrapper command prepended to the Elinks command-line."
+  :type '(repeat (string :tag "Wrapper"))
+  :group 'browse-url)
+
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; URL encoding
 
@@ -1493,6 +1500,46 @@
   (apply #'start-process (concat "KDE " url) nil browse-url-kde-program
                         (append browse-url-kde-args (list url))))
 
+;;;###autoload
+(defun browse-url-elinks (url)
+  "Ask the Elinks WWW browser to load URL.
+Default to the URL around the point.
+
+The document is loaded in a new tab of a running Elinks or, if
+none yet running, a newly started instance.
+
+The Elinks command will be prepended by the program+arguments
+from `elinks-browse-url-wrapper'."
+  (interactive (browse-url-interactive-arg "URL: "))
+  (setq url (browse-url-encode-url url))
+  (let ((process-environment (browse-url-process-environment))
+       (elinks-ping-process (start-process "elinks-ping" nil
+                                            "elinks" "-remote" "ping()")))
+    (set-process-sentinel elinks-ping-process
+                         `(lambda (process change)
+                            (browse-url-elinks-sentinel process ,url)))))
+
+(defun browse-url-elinks-sentinel (process url)
+  "Determines if Elinks is running or a new one has to be started."
+  (let ((exit-status (process-exit-status process))
+       (process-environment (browse-url-process-environment)))
+    ;; Try to determine if an instance is running or if we have to
+    ;; create a new one.
+    (case exit-status
+      (5
+       ;; No instance, start a new one.
+       (apply #'start-process
+             (append (list (concat "elinks:" url) nil)
+                     browse-url-elinks-wrapper
+                     (list "elinks" url))))
+      (0
+       ;; Found an instance, open URL in new tab.
+       (start-process (concat "elinks:" url) nil
+                     "elinks" "-remote"
+                     (concat "openURL(\"" url "\",new-tab)")))
+      (otherwise
+       (error "Undefined exit-code of process `elinks'.")))))
+
 (provide 'browse-url)
 
 ;;; arch-tag: d2079573-5c06-4097-9598-f550fba19430