Allow opening a specific line / page in an external program

[luleyleo]

I'm not sure, how to approach this with Flatpak and what the UI should look like.

[luleyleo]

https://gitlab.gnome.org/GNOME/Incubator/papers/-/blob/main/shell/src/application.rs?ref_type=heads#L135

For PDFs (Gnome Papers and KDE Okular) the page can be passed as part of the file URI:

file:///path/to/file.pdf#page=x

For text files (KDE Kate, not Gnome TextEditor) this works:

file:///path/to/file.rs?line=40

[luleyleo]

The OpenURI Portal apparently does not support file URIs for some reason. This will probably only be possible with a host service which directly launches the applications with appropriate arguments.

[sojusnik]

Don't know if this helps in your situation, but Zotero is able to open pdfs on a certain page, when the mimetype is specified, which allows links as zotero://open-pdf/library/items/GTW2HVPE?page=36 to be opened on the specified page.