Struct LineStyle 

pub struct LineStyle<'a> {
    pub line: usize,
    pub left_col: usize,
    pub width: usize,
    pub tab_width: usize,
    pub selections: &'a [Selection],
    pub primary: Selection,
    pub cursor_line: bool,
    pub brackets: Option<(Position, Position)>,
    pub theme: &'a ThemeColors,
}

Everything needed to draw one visible line.

A struct rather than nine positional arguments: the call site was already at six and the three effects added here would have made it a row of unlabelled values where swapping two usizes compiles cleanly and renders wrong.

Fields

line: usize

left_col: usize

width: usize

Text-area width in cells, for padding the current-line highlight out to the edge.

tab_width: usize

selections: &'a [Selection]

primary: Selection

cursor_line: bool

Whether a caret sits on this line with nothing selected. A line carrying a real selection does not also get the stripe — the selection is already saying where the user is, and two answers to one question is how a interface starts to look busy.

brackets: Option<(Position, Position)>

theme: &'a ThemeColors