Struct Cell 

pub struct Cell {
    pub ch: char,
    pub style: CellStyle,
    pub width: u8,
}

One screen cell: glyph + its visual attributes. Cell equality is byte-perfect — two cells are equal iff their serialised bytes would be identical, which is the invariant the diff relies on.

width is the display width in terminal columns: 1 for ASCII and other narrow glyphs, 2 for CJK / emoji / other wide glyphs, and 0 for continuation cells — placeholder cells that follow a wide glyph to keep the invariant cell_index == terminal_column. Without continuation cells, typing “你是谁” (3 wide chars = 6 cols) into a row model that tracked only char count (3 cells) would emit patches at model cols 5/6/7 while the terminal had just advanced to actual col 11 after the first 你, overwriting each preceding glyph’s right half with the next glyph — the “you3-type-shows-only- last-char” bug.

Fields

ch: char

style: CellStyle

width: u8

Implementations

impl Cell

pub fn blank() -> Self

Blank narrow cell — space, width 1. Used for padding and as the diff’s “erase” glyph.

pub fn continuation() -> Self

Continuation cell — placeholder for the 2nd (or 3rd, if any) terminal column occupied by a wide glyph. width = 0 tells serialize_patches to skip emit for this cell: the wide glyph emitted in the cell immediately before has already advanced the terminal cursor past this column.

Trait Implementations

impl Clone for Cell

fn clone(&self) -> Cell

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Cell

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

Formats the value using the given formatter.

impl Default for Cell

fn default() -> Self

Default blank cell = ASCII space, width 1, default style.

impl PartialEq for Cell

fn eq(&self, other: &Cell) -> 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 Eq for Cell

impl StructuralPartialEq for Cell