Struct EditingState 

pub struct EditingState {
    pub text: String,
    pub selection_base: i32,
    pub selection_extent: i32,
    pub composing_base: i32,
    pub composing_extent: i32,
}

The full editing state of a text field, the one struct every IME bridge syncs.

This mirrors Flutter’s canonical editing-state shape (−1 = “none” for the selection/composing anchors). It is the value pushed across the framework↔ platform seam in both directions.

Index boundary rule

An EditingState crossing the AppTree/shell seam is UTF-16 code-unit indexed (selection_*/composing_* count UTF-16 units, the platform-native unit for both Android Editable and iOS NSMutableString). Widgets and frust-text convert to/from Rust byte offsets at their own boundary. Core carries the value opaquely and makes no index interpretation.

Fields

text: String

The full text content.

selection_base: i32

Selection anchor (UTF-16 unit index at the shell seam; −1 = none).

selection_extent: i32

Selection focus (UTF-16 unit index at the shell seam; −1 = none).

composing_base: i32

Composing-region start (UTF-16 unit index; −1 = not composing).

composing_extent: i32

Composing-region end (UTF-16 unit index; −1 = not composing).

Trait Implementations

impl Clone for EditingState

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EditingState

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

Formats the value using the given formatter.

impl Default for EditingState

fn default() -> Self

An empty field with no selection and no composing region.

Note this is not the derived default: the anchors are the −1 “none” sentinel, not 0 (which would mean a real caret at offset 0).

impl Eq for EditingState

impl PartialEq for EditingState

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for EditingState