Provide a Searcher for script templates

[imagejan]

In addition to snippets, it might be useful to be able to search all available script templates and open them in the script editor.

See also https://github.com/scijava/script-editor/issues/6.

[imagejan]

I've made a first attempt implementing this on the add-template-search branch.

Remaining tasks:

• [x] Open the script when the Open button is pressed. (@ctrueden what's the preferred way of doing so using a SciJava service? We should keep it agnostic of the script-editor component, no?)

On the other hand, maybe this whole search module should actually live in the script-editor repo? Opinions, @ctrueden, @stelfrich?

[stelfrich]

On the other hand, maybe this whole search module should actually live in the script-editor repo?

That's a philosophical question, I guess. Templates, in general, are independent of the script-editor component. If script-editor is not available, there's not really that much you can do with the search result, right? However, you should still be able to get template search results, even if you can't take any action on them in the previous case.

What about keeping TemplateSearchResult and TemplateSearcher in here and moving OpenTemplateSearchActionFactory to script-editor? We don't have an example for that kind of separation at the moment, but generating search results and providing an action could be separated.

[imagejan]

Thanks, @stelfrich, for the advice. I wasn't aware that the "Source" and "Help" SearchActionFactory classes already live in imagej-legacy.

I now moved OpenTemplateSearchActionFactory to imagej-legacy in https://github.com/imagej/imagej-legacy/pull/181.