Undo a turn

Take back one agent or notebook turn on the branch shown: show the step before it, or, with only_own, delete only the turn's own steps (applying the others again) when someone else's steps came in between.

Usage

cellucid_history_turn_undo(viewer, turn, only_own = FALSE)

Arguments

viewer

A viewer cellucid_view() or cellucid_serve() returned.

turn

A turn, by its id (history_summary lists them). Text (at least 1 character). Required.

only_own

Delete only the turn's own steps, keeping the others (to Recently deleted). TRUE or FALSE. Default FALSE, the viewer's own.

Value

A cellucid_action_request, at once and invisibly: the action is sent now, or when the viewer's channel opens. cellucid_action_result(request) returns its outcome: a list of head (The step shown now), journal, other_branches (Branches holding more of its steps, undone there separately), removed (Steps deleted (only_own)).

Details

The viewer's action history.turn.undo (History). It moves the viewer's history, as the person's Undo, Redo or a click on a step does: it makes no step of the history.

See also

cellucid_act() sends any action by its type, and cellucid_action_result() collects its answer.

Examples

if (interactive() && requireNamespace("SeuratObject", quietly = TRUE)) {
  data("pbmc_small", package = "SeuratObject")
  viewer <- cellucid_view(SeuratObject::UpdateSeuratObject(pbmc_small))
  request <- cellucid_history_turn_undo(viewer, turn = "turn-1")
  print(request)
  # cellucid_action_result(request) waits for its outcome.
  cellucid_stop(viewer)
}