Struct Row 

pub struct Row {
    buf: String,
    width: usize,
    max: usize,
}

One line of the frame, built left to right with its visible width tracked separately from its bytes.

Styling is inline ANSI, so buf.len() says nothing about how wide the line renders; every truncation and every pad has to go through width. That is the entire reason this type exists rather than a String.

Fields

buf: String

width: usize

max: usize

Implementations

impl Row

pub fn new(max: usize) -> Row

pub fn left(&self) -> usize

pub fn cap(&mut self, max: usize) -> &mut Row

Move the right edge, so a right-aligned field can reserve its space before the left-hand side is written and be clipped away by it.

pub fn put(&mut self, style: &str, s: &str) -> &mut Row

Append text, truncated to what is left of the line.

ponytail: one column per char. A CJK log body renders one cell wide per character here and will run past the right edge; the fix is a unicode-width table, which is a crate, and the payload this reads is attribute keys and metric names. Revisit if a user shows up with a wide-character body.

pub fn plain(&mut self, s: &str) -> &mut Row

pub fn raw(&mut self, s: &str, width: usize) -> &mut Row

Append an already-rendered line of known visible width, byte for byte.

put would rewrite its ESC bytes to · and count each one as a column, which is right for a log body and wrong for a line that came out of another Row. Nothing here can recover the width from the bytes, so the caller states it — pass a line finished with done, which pads to exactly the width it was built for.

pub fn pad_to(&mut self, col: usize) -> &mut Row

Pad with spaces until the cursor sits at col. Never truncates: a column that overflowed its slot pushes the next one right rather than losing it.

pub fn repeat(&mut self, style: &str, c: char, n: usize) -> &mut Row

Repeat c n times, clipped to the line.

pub fn fill(self, style: &str) -> String

Finish the line, padded to full width so a selected row’s reverse-video background reaches the right edge.

pub fn done(self) -> String