FB5703918: Expose to the Share extension the name of the app that triggered (hosts) the extension

[sindresorhus]

• Date: 2019-02-12
• Resolution: Open
• Area: AppKit
• OS: macOS 10.14.3
• Type: Suggestion

Details

I have a Share extension that needs to know which app triggered it. The extension presents a list of apps and by knowing which app triggered it, it can prioritize that app in the list by moving it to the top.

There are also other use-cases for knowing this:

• Working around an app sending buggy/weird NSExtensionItem attachments.
• Improve heuristics for which NSExtensionItem attachments and representations to pick.
• Let the user opt-into sharing which app originally made the shared item.

Expected Results:
I expected NSExtensionContext to have a .sourceApp property with the name (or NSRunningApplication instance) of the host/trigger app.

Actual Results:
No property like this.

Notes:
My current workaround is to use NSWorkspace.shared.frontmostApplication, but that has timing issues.