Struct zng_ext_undo::UndoStackInfo

pub struct UndoStackInfo {
    pub stack: Vec<(DInstant, Arc<dyn UndoInfo>)>,
    pub undo_interval: Duration,
}

Snapshot of the undo or redo stacks in an UNDO scope.

Fields

stack: Vec<(DInstant, Arc<dyn UndoInfo>)>

Clones the timestamp and info of all entries in the current undo stack.

In an undo list the latest undo action (first to undo) is the last entry in the list and has the latest timestamp.

In an redo list the latest undone action is the last entry (first to redo). Note that the timestamp marks the moment the original undo registered the action, so the newest timestamp is in the first entry for redo lists.

undo_interval: Duration

Grouping interval.

Implementations

impl UndoStackInfo

pub fn iter_groups( &self, ) -> impl DoubleEndedIterator<Item = &[(DInstant, Arc<dyn UndoInfo>)]>

Iterate over the stack, grouped by undo_interval.

Trait Implementations

impl Clone for UndoStackInfo

fn clone(&self) -> UndoStackInfo

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.