Struct TextCaret 

pub struct TextCaret {
    pub start: usize,
    pub end: usize,
}

Byte-offset describing the text caret / a text selection on an editable node.

Offsets are byte indices into the UTF-8 representation of the crate::tree::A11yNode::text_content string. The tree builder translates them into AccessKit’s accesskit::TextSelection / accesskit::TextPosition coordinates by synthesising a child accesskit::Role::TextRun node carrying the text’s character-length table.

For a pure caret (no selection), set TextCaret::start and TextCaret::end to the same value.

Fields

start: usize

Byte offset of the selection anchor (does not move while extending).

end: usize

Byte offset of the selection focus (moves while extending).

Implementations

impl TextCaret

pub const fn caret(pos: usize) -> Self

Construct a degenerate selection at byte offset pos (i.e. a caret).

pub const fn range(start: usize, end: usize) -> Self

Construct a selection running between two byte offsets.

The two offsets may appear in either order; the type stores them as supplied so that callers can preserve the directional anchor/focus distinction.

pub fn lo(&self) -> usize

Lower bound of the selected range, regardless of direction.

pub fn hi(&self) -> usize

Upper bound of the selected range, regardless of direction.

pub fn is_caret(&self) -> bool

true if this caret has no selected range (start == end).

Trait Implementations

impl Clone for TextCaret

fn clone(&self) -> TextCaret

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for TextCaret

impl Debug for TextCaret

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

Formats the value using the given formatter.

impl Default for TextCaret

fn default() -> TextCaret

Returns the “default value” for a type.

impl Eq for TextCaret

impl Hash for TextCaret

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for TextCaret

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for TextCaret