Struct ScrollOp 

pub struct ScrollOp {
    pub top: usize,
    pub bottom: usize,
    pub count: isize,
}

A first-class scroll: rows [top..=bottom] shifted by count lines (positive = up, negative = down). The renderer moves the rows instead of redrawing them. Recorded by the engine — which executes the scroll — rather than diff-detected (ADR-0003).

A reported count never exceeds bottom - top + 1 — see crate::Engine::scroll_delta, which caps it. count is isize here and i16 on the wire, so an uncapped accumulation overflowed the field and reversed the shift’s direction (#661); the bound is also the point past which the value stops meaning anything, since every source row is then outside the region. The cap is applied when the op is read, not while it accumulates, so a region that scrolls far and returns still reports its true small net.

Fields

top: usize

bottom: usize

count: isize

Trait Implementations

impl Clone for ScrollOp

fn clone(&self) -> ScrollOp

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ScrollOp

impl Debug for ScrollOp

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

Formats the value using the given formatter.

impl Eq for ScrollOp

impl PartialEq for ScrollOp

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ScrollOp