File viewer and editors

[PVince81]

Story:
Given a developer want to add an action to open a file in another tool
When the app code registers a file action for text files
Then the action shall be visible on text files

When a user executes the file action
Then app code is to be executed or a given url is to be opened (in another tab)

Tasks:

• implement file action + viewer concept in phoenix files app (3MD)
• implement an app to show (text editor which opens a text file in new browser tab) (2MD)

---

Like owncloud/core#13414.

Provide an extension point of some form where apps can register their own "file viewer" for different formats.
This will tie in somehow with the file actions

Please add input as we need to decide on the UX for this.

One proposal was to always have apps open their viewer in a separate page.
This also means the separate page needs to have some layout and styling from Phoenix.

@felixheidecke @DeepDiver1975 @tomneedham @pmaier1

[tomneedham]

Random thoughts:

• Open in new window (new tab if clicked with ctrl+click), no 'inline' editors
• Back button returns to file list, scrolled to the same location
• Needs a similar 'registerActions' type handler for mime registration
  • On that thought, as an admin some global preferred handler config might be nice
• At least how we do it now, each editor should have a route, which accepts a fileid (eg, now I have /apps/drawio/editor/{fielid}
• New persistent locking is most likely needed to give a nice UX
  • Seeing who is currently editing this file (who owns the lock) would be awesome

[PVince81]

Also to discuss, providing a framework:

• how to handle read-only vs read-write mode ?
• what about additional permissions like "comments only" (Collabora and OnlyOffice)
• also think about public link page

[tomneedham]

what about additional permissions like "comments only" (Collabora and OnlyOffice)

Like 'review' permissions - could be cool

[DeepDiver1975]

I don't see a way to integrate app driven/defined permissions to be handled in core. At least I did not have a clever idea ....

[PVince81]

also need to make sure file viewer works in public page

[DeepDiver1975]

There is a markdown editor in phoenix which shows how an editor can be integrated. closing for now