With the recent addition of search_embed iframes on other pages, we
had photo cards appearing but the photo_clipboard module was not
imported thus the checkboxes did nothing. I don't want to import
photo_clipboard onto every single page, I'd rather they click through
to the full search UI. Otherwise every single page will have the tray
and often not a good enough reason for it.
So, since the functionality of the checkbox is completely reliant on
the photo_clipboard.js module anyway, there's no reason not to have it
generated by that module.
In narrow mode, it's very possible to wind up with only 1 photo per row,
and it looks silly when they are left-justified. Centered looks a little
more natural to me in this case.
This prevents the specific tag from being included in the results in
the first place, and has the knock-on effect that the descendants'
lines won't all start with the parent tag's name.
Previously, then the tags list was very long and dominated the scroll
height of the page, the #right and thus the photo would be floating
halfway down the page. By making it sticky, the photo always occupies
the correct position in the viewport no matter how long #left gets.
The current system has bad performance when you've got 100,000+ tags.
I discovered that when the server returns 304, the browser gives the
ajax a 200 with the full response, and it's not clear to me if js can
know it got a 304. So, the tag set is being fully re-parsed from the
response on every page load. I was thinking that I should store that in
IndexedDB to avoid the parsing step, but... since the JSON.parse is
done by my common.get before it hits this function, it's meaningless.
Not to mention I still have to rebuild the datalist on every page since
of course that state isn't shared between tabs. Not worth the DB stuff.
We'll see what happens next.
