Struct history_tree::HistoryTree

pub struct HistoryTree {
    pub records: Vec<Record>,
    pub cursor: Option<usize>,
}

Stores information about history tree relations.

Fields

records: Vec<Record>

Stores records.

cursor: Option<usize>

History cursor. Points to an index of records where all previous changes are active, and those after are inactive. When set to None, it is assumed to point to the latest version.

Methods

impl HistoryTree

fn new() -> HistoryTree

Creates a new history tree.

fn root(&self) -> usize

Gets the root.

fn cursor(&self) -> usize

Gets the cursor.

fn add(&mut self, parent: usize) -> usize

Add new node.

fn change(&mut self, node: &mut usize)

Change node.

fn delete(&mut self, node: usize)

Delete node.

fn children(&self, parent: usize) -> Vec<usize>

Gets the names of children.

fn undo(&mut self)

Goes back one step in history.

fn redo(&mut self)

Goes forward one step in history.

fn print(&self, parent: usize, tabs: u32)

Prints relations to standard output. This is used for debugging.

Trait Implementations

impl Clone for HistoryTree

fn clone(&self) -> HistoryTree

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for HistoryTree

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl PartialEq for HistoryTree

fn eq(&self, __arg_0: &HistoryTree) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, __arg_0: &HistoryTree) -> bool

This method tests for !=.

impl Eq for HistoryTree