Add support for pdf tooltip!
Submitted by 9u0..@..il.com
Assigned to poppler-bugs
Some PDf files have 'tooltip' feature on them. For an example document, see the section 3.2 (\pdftooltip command) of the 'package documentation' file on this website (https://www.ctan.org/pkg/pdfcomment).
I tested this using the aformentioned .pdf file and various PDF readers. It worked perfectly with Microsoft Edge (Windows), SumatraPDF (Windows, Wine on Linux and macOS), Adobe Acrobat Reader (Windows and macOS), and Foxit reader (Windows, Linux, and macOS). But not with Evince. (Actually I couldn't find any Linux-native reader that support this tooltip feature.) An Evince developer told me that this is because Poppler doesn't support API for tooltips (https://bugzilla.gnome.org/show_bug.cgi?id=793986).