Struct LineWindow 

pub struct LineWindow {
    pub body: String,
    pub total_lines: usize,
    pub start: usize,
    pub end: usize,
}

A streamed line-window read (#811): only the requested span’s raw lines, plus the file’s true total line count for the header — the rest of the file is never buffered.

Fields

body: String

Raw lines within [start, end], joined with \n.

total_lines: usize

True total line count of the file.

start: usize

Clamped, 1-based inclusive bounds actually served.

end: usize