Function parse_cli_opts

src/lib.rs:53–97

Parse the command line options.

(call: &EvaluatedCall)

/// Parse the command line options.
fn parse_cli_opts(call: &EvaluatedCall) -> Result<CliOpts, LabeledError> {
    // scale the width and height to the size of the terminal unless specified on the cli
    let height_op: Option<u32> = call.get_flag("height").map(|e| e.map(|f: i64| f as u32))?;
    let width_op: Option<u32> = call.get_flag("width").map(|e| e.map(|f: i64| f as u32))?;

    let mut height: Option<u32>;
    let mut width: Option<u32>;

    if let Some((w, h)) = term_size::dimensions() {
        // don't know why I need to scale this, but I do - I hope it works
        // as intended for other terminals.
        height = Some(height_op.unwrap_or((h as f32 * 1.7) as u32));
        width = Some(width_op.unwrap_or((w as f32 * 1.7) as u32));

        // textplot panics if either of these are below 32 units.
        if height.unwrap() < 32 {
            height = Some(32);
        }
        if width.unwrap() < 32 {
            width = Some(32);
        }
    } else {
        // we couldnt detect terminal size for some reason
        height = height_op;
        width = width_op;
    }

    let legend = call.has_flag("legend")?;
    let steps = call.has_flag("steps")?;
    let bars = call.has_flag("bars")?;
    let points = call.has_flag("points")?;
    let bins: Option<u32> = call.get_flag("bins").map(|e| e.map(|f: i64| f as u32))?;
    let title: Option<String> = call.get_flag("title")?;

    Ok(CliOpts {
        height_op: height,
        width_op: width,
        legend,
        steps,
        bars,
        points,
        bins,
        title,
    })
}

/// The shape of the plot. Default is `Shape::Lines`,
/// but also includes `Shape::Bars` and `Shape::Steps`.