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, 2 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 4f1d23ac..89348d3c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -29,6 +29,8 @@ dillo-3.2.0 [Not released yet]
  - Reload current page on SIGUSR1 signal
  - Print library versions and enabled features with dillo -v.
  - Allow image formats to be ignored with the "ignore_image_formats" option.
+ - Add the "link_action" option to define custom menu entries to open links
+   with external programs or scripts.
    Patches: Rodrigo Arias Mallo
 +- Add primitive support for SVG using the nanosvg.h library.
  - Add support for ch, rem, vw, vh, vmin and vmax CSS units.