filtering pdfs

I use Media Library Assistant to post the pdf newsletters of my local historical society all in one place. I recently was asked if perhaps these newsletter could be made searchable from that page. One way to achieve this would be to filter the newsletters shown on the basis of a search menu. Ideally, when pulling up the page all newsletters would be displayed and with a search for a specific keyword only the newsletters with those keywords would be shown. However, I am running into a number of problems trying to make this happen with just Media Library Assistant.

i) I thought some version of the MLA UI Elements Example would do the job. However, there seems to be an issue with filtering pdf files. The only adjustment that I made to the code of MLA UI Elements Example is that I changed the post-mime-type. While the dropdown menu works fine for post-mime-type=application/pdf and gives all the categories for my pdf files, [muie_keyword_search] does not seem to find any pdf files — regardless what keyword I use.

ii) Not sure how to filter on the basis of content of a pdf file with [muie_keyword_search] or if it is even possible. All pdf files on the site are searchable for text in Preview and Adobe.

iii) By default, MLA UI Elements Example, seems to not display any items. Is it possible to make the display of all items in the gallery the default?

Thanks,

Eisso

The page I need help with: [log in to see the link]