Add ability to stream or push items into a Quickpick

[eamodio]

• VSCode Version: 1.10.0-insider 256d76f
• OS Version: macOS Sierra 10.12.3 (16D32)

Basically provide a way to add additional items to a quickpick after it is shown and/or provide a way to pass an array of promises to showQuickPick that would add items as each one resolves.

[jrieken]

way to pass an array of promises to showQuickPick that

We do allow a single promise that resolves to an array of strings or message item, like so

const myPromisedItems = new Promise(resolve => resolve(['one', 'two', 'three']);
vscode.window.showQuickPick(myPromisedItems)

What we don't support is to update the quick pick later, neither with a promise nor with a sync set of items

[eamodio]

Yeah I was thinking with the array of promises vs a single, is that there could be a race setup where anytime one of the promises was resolved it would add its items to the list -- so entries would somewhat stream in.

For example in my Find Related extension, I kick off a series of promises to search for different file matches, and now currently aggregate them into a single promise that generates the list of quickpick items, but it would be great if I could have the items returned by each promise added to the list when it became ready. So longer searches don't block the shorter ones.

[jrieken]

Understood. The big challenge with streaming results (to basically anywhere) is how the UI should behave. Once a subset of results is in users can filter and select one and it will be hard to keep the UX stable when more results come in, esp wrt sorting

[eamodio]

Yeah, that is tricky to be sure.

[KnisterPeter]

Just as a reference to track the issue KnisterPeter/vscode-github#84

[jrieken]

This can be done with the new API we have: https://code.visualstudio.com/updates/v1_26#_quickinput-api