Enum LineAffinity 

pub enum LineAffinity {
    Upstream,
    Downstream,
}

Which visual line a caret/handle at a soft-wrap boundary belongs to. At a shared boundary byte (the end of one wrapped visual line IS the start of the next — mid-word wraps produce these) the offset alone is ambiguous:

• LineAffinity::Upstream anchors to the END of the upper line — the glyph a dragging finger means. Selection END and cursor handles, the drawn caret, and the loupe use this; without it a drag along a wrapped line’s right edge snaps the handle one line DOWN and to the left edge.
• LineAffinity::Downstream anchors to the START of the lower line — where the first selected glyph actually renders. Selection START handles and highlight geometry use this.

Variants

Upstream

Downstream

Trait Implementations

impl Clone for LineAffinity

fn clone(&self) -> LineAffinity

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for LineAffinity

impl Debug for LineAffinity

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

Formats the value using the given formatter.

impl Eq for LineAffinity

impl PartialEq for LineAffinity

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for LineAffinity