Port to D7

Awesome work, thank you !
I don't use D7 myself, and see no reason to upgrade for the small use I put Drupal too, so haven't invested the time myself.

I've granted you commit rights (I think) so go ahead and create whatever GIT calls a D7 branch, and we'll put up a beta release ASAP for people to try out (as I can't).
I could do this for you, but I'm not sure if you took the base tag from the 6.x or master branches.

Dev branch published, thanks again !

As discussed with pluess at the drupal usergroup this evening here an extended patch for link_node.
Changelog:

- addapted link_node_filter_link_node_settings() for D7 (no Fieldsets requred, description added)
- Settings in link_node_filter_link_node_settings() are now saved properly (via D7 way to save it)
- in link_node_filter_link_node_process() the settings are also loaded via $filter->settings
- removed echo "hallo" ;)
- theme_link_node_thumbnail($node) changed to theme('link_node_thumbnail', $node);
- link_node_help() adjusted because the "Currently available parameters" cannot be shown (no $filter object)
- link_node_filter_link_node_tips() load settings from $filter->settings

Important!

The Patch is done via "git format-patch"
@Pluess if you apply the patch, can you please use:

git am --signoff --ignore-whitespace < saving_settings-1159830-4.patch

this should keep the commiter for my account (what we have discussed) and add your account below.

Happy testing :)

I prefer not to create a new issue as long as both D7 branch developers are working on this one.

There's a bug when you try to refer in a node's field to itself, the reason is that node_load calls link_node_filter_link_node_process which calls node_load generating an infinite loop.

I've created an issue in style's module refering to the architecture of filters which could let you see a possible situation where administrator's theme theme_link_node_format overwritten function output could be injected in another theme:

#1170736: Better compatibility with media filter (WYSIWYG related)

Thank you for the great work already done.