Struct Selection 

pub struct Selection {
    pub anchor: usize,
    pub cursor: usize,
}

Anchor + cursor pair. anchor == cursor means “no live selection”.

Fields

anchor: usize

Where the selection was anchored (typically: where the user pressed the mouse, or the caret position when shift was first held). Stays fixed while the cursor moves.

cursor: usize

Live caret position. Moves while extending the selection.

Implementations

impl Selection

pub fn collapsed(pos: usize) -> Selection

pub fn is_collapsed(&self) -> bool

true when anchor == cursor — no characters are selected.

pub fn min(&self) -> usize

pub fn max(&self) -> usize

pub fn range(&self) -> Range<usize>

pub fn collapse_to_cursor(&mut self)

pub fn move_to(&mut self, pos: usize)

Move the cursor to pos, snapping the anchor as well so the selection collapses. Use when the caller wants a pure move.

pub fn extend_to(&mut self, pos: usize)

Move the cursor to pos, keeping the anchor where it is so the selection extends. Use this for shift+arrow / shift+click.

Trait Implementations

impl Clone for Selection

fn clone(&self) -> Selection

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Selection

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

Formats the value using the given formatter.

impl Default for Selection

fn default() -> Selection

Returns the “default value” for a type.

impl PartialEq for Selection

fn eq(&self, other: &Selection) -> 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 Copy for Selection

impl Eq for Selection

impl StructuralPartialEq for Selection