Struct UndoEntry 

pub struct UndoEntry {
    pub rope: Rope,
    pub cursor: (usize, usize),
    pub timestamp: SystemTime,
}

A single entry in the undo or redo stack.

The timestamp records the wall-clock time at which the snapshot was taken (i.e. when push_undo was called), enabling the :earlier / :later time-travel ex commands to walk the stack by duration rather than by step count.

Stored as a ropey::Rope (O(1) Arc-clone) rather than a String so snapshot cost is negligible even on multi-MB buffers.

Fields

rope: Rope

cursor: (usize, usize)

timestamp: SystemTime