UI does not render until all items are retrieved when executing a slow Source

[tennashi]

When executing a Source that takes a long time to retrieve items (e.g., fetching a large dataset over a network), the UI does not render anything until all items have been retrieved.

Is this the expected behavior?

function test(): Source<never> {
  return defineSource(async function* (_denops) {
    let id = 0;
    while (true) {
      yield {
        id: id++,
        value: "hoge",
      }
      await new Promise(resolve => setTimeout(resolve, 1000));
    }
  });
}

definePickerFromSource(
  "test",
  test,
  {
    matchers: [builtin.matcher.fzf],
    actions: {
      ...myPathActions,
    },
    defaultAction: "cd",
  },
);

I expect the items to be rendered every second.

[lambdalisue]

it's expected but not desired. i'll think of it.

[lambdalisue]

@tennashi Could you try #33

[tennashi]

@lambdalisue LGTM!