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, 32 insertions, 0 deletions

diff --git a/src/actions.h b/src/actions.h
new file mode 100644
index 00000000..b5319bea
--- /dev/null
+++ b/src/actions.h
@@ -0,0 +1,32 @@
+/*
+ * File: actions.h
+ *
+ * Copyright (C) 2024 Rodrigo Arias Mallo <rodarima@gmail.com>
+ *
+ * This program 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 3 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef ACTIONS_H
+#define ACTIONS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#include "dlib/dlib.h"
+
+typedef struct {
+   char *label;
+   char *cmd;
+} Action;
+
+void a_Actions_init(void);
+Dlist *a_Actions_link_get(void);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+#endif /* ACTIONS_H*/