Struct TextEditState 

pub struct TextEditState {
    pub text: String,
    pub cursor: usize,
    pub anchor: usize,
    pub epoch: u64,
}

The mutable editing state shared between TextField and its undo commands.

epoch is a monotonically-increasing text-content revision. It lets a widget that caches something derived from text (e.g. TextArea’s wrapped visual lines) detect when the text was mutated through a different owner of the same shared handle — the case where the widget’s own internal invalidation never ran. Bump it via note_text_change whenever text is modified through a shared reference; cursor/anchor-only moves must NOT bump it (they don’t affect wrapping).

Fields

text: String

cursor: usize

anchor: usize

epoch: u64

Implementations

impl TextEditState

pub fn note_text_change(&mut self)

Record that text changed: advances the content epoch.

pub fn selection_range(&self) -> Option<(usize, usize)>

Sorted [start, end) byte range of the current selection, or None when the selection is empty (cursor == anchor).

Trait Implementations

impl Clone for TextEditState

fn clone(&self) -> TextEditState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for TextEditState

fn default() -> TextEditState

Returns the “default value” for a type.