Struct History 

pub struct History {
    pub undo_stack: Vec<Transaction>,
    pub redo_stack: Vec<Transaction>,
}

Tracks the undo and redo history of a document.

Transactions are stored in the undo stack when they are applied. When a transaction is undone, it is moved to the redo stack. When it is redone, it is moved back to the undo stack.

The most recent transaction is stored at the end of each stack.

Adding a new edit after undoing previous edits should clear the redo stack, as the previous redo history is no longer applicable.

Fields

undo_stack: Vec<Transaction>

Transactions that can currently be undone.

The most recent transaction is at the end of the vector.

redo_stack: Vec<Transaction>

Transactions that can currently be redone.

The most recently undone transaction is at the end of the vector.

Trait Implementations

impl Debug for History

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for History

fn default() -> History

Returns the “default value” for a type.