Add support for user actions in the link menu

Allows the user to define additional entries in the link menu which will
execute the given program/script. Each actions is defined using the
"link_action" option. The link URL is stored in the $url enviroment
variable and the current page in $origin, so the user can customize how
do the handling.

Here is a simple example to add three new entries:

    link_action="Debug variables:echo url=$url origin=$origin"
    link_action="Open in MPV:mpv $url"
    link_action="Open in Firefox:firefox $url"

The command is spawned in a forked process using the system() call,
which uses the shell to expand any variable. In particular, the $url
variable is set to the current URL being opened.

Fixes: https://github.com/dillo-browser/dillo/issues/3

1 files changed, 11 insertions, 0 deletions

diff --git a/dillorc b/dillorc
index 88afe11a..484185c2 100644
--- a/dillorc
+++ b/dillorc
@@ -64,6 +64,17 @@
 # jump to a given position.
 #scrollbar_page_mode=NO
 
+# Define custom actions for the link menu. The format is <label>:<cmd>. The
+# command will be executed in the system shell using the system() call. You can
+# implement your own handling logic in a script or program. The following
+# environment variables are set:
+#   $url:    URL being opened
+#   $origin: URL of the current document
+# Examples:
+# link_action="Debug variables:echo url=$url origin=$origin"
+# link_action="Open in MPV:mpv $url"
+# link_action="Open in Firefox:firefox $url"
+
 #-------------------------------------------------------------------------
 #                           RENDERING SECTION
 #-------------------------------------------------------------------------