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, 1 insertions, 0 deletions

diff --git a/src/prefs.c b/src/prefs.c
index 4a68e4c9..a57c792c 100644
--- a/src/prefs.c
+++ b/src/prefs.c
@@ -85,6 +85,7 @@ void a_Prefs_init(void)
    prefs.scroll_switches_tabs = TRUE;
    prefs.scroll_switches_tabs_reverse = FALSE;
    prefs.no_proxy = dStrdup(PREFS_NO_PROXY);
+   prefs.link_actions = dList_new(16);
    prefs.panel_size = P_medium;
    prefs.parse_embedded_css=TRUE;
    prefs.save_dir = dStrdup(PREFS_SAVE_DIR);