Enum Outcome 

pub enum Outcome {
    Done(Value),
    Blob {
        json: Value,
        bytes: Vec<u8>,
    },
    AwaitScreenshot {
        token: u64,
        region: Region,
        document: Option<String>,
    },
    Poll(Poller),
}

What a handler returns.

Variants

Done(Value)

Blob

A JSON result plus a binary payload (a PNG) carried beside it.

Fields

json: Value

bytes: Vec<u8>

AwaitScreenshot

The reply completes when Event::Screenshot with this token arrives. document is the visible document’s handle when the capture was asked for; the capture is refused if another one is showing when it lands.

Fields

token: u64

region: Region

document: Option<String>

Poll(Poller)

Long work the command has STARTED without waiting for it: the queue calls the poller once per frame in the command’s phase, from the frame thread, until it answers. A handler never waits inside a frame — geometry, a PLM answer or a store write lands on later frames, and the app keeps drawing and answering other commands meanwhile.